Journal articles: 'Temporal graph exploration'

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Erlebach, Thomas, and Jakob T. Spooner. "Exploration of k-edge-deficient temporal graphs." Acta Informatica 59, no. 4 (August 2022): 387–407. http://dx.doi.org/10.1007/s00236-022-00421-5.

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AbstractA temporal graph with lifetime L is a sequence of L graphs $$G_1, \ldots ,G_L$$ G 1 , … , G L , called layers, all of which have the same vertex set V but can have different edge sets. The underlying graph is the graph with vertex set V that contains all the edges that appear in at least one layer. The temporal graph is always connected if each layer is a connected graph, and it is k-edge-deficient if each layer contains all except at most k edges of the underlying graph. For a given start vertex s, a temporal exploration is a temporal walk that starts at s, traverses at most one edge in each layer, and visits all vertices of the temporal graph. We show that always-connected, k-edge-deficient temporal graphs with sufficient lifetime can always be explored in $$O(kn \log n)$$ O ( k n log n ) time steps. We also construct always-connected, k-edge-deficient temporal graphs for which any exploration requires $$\varOmega (n \log k)$$ Ω ( n log k ) time steps. For always-connected, 1-edge-deficient temporal graphs, we show that O(n) time steps suffice for temporal exploration.

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Erlebach, Thomas, Michael Hoffmann, and Frank Kammer. "On temporal graph exploration." Journal of Computer and System Sciences 119 (August 2021): 1–18. http://dx.doi.org/10.1016/j.jcss.2021.01.005.

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Zhang, Zhiwen, Chenghao Shi, Pengming Zhu, Zhiwen Zeng, and Hui Zhang. "Autonomous Exploration of Mobile Robots via Deep Reinforcement Learning Based on Spatiotemporal Information on Graph." Applied Sciences 11, no. 18 (September 7, 2021): 8299. http://dx.doi.org/10.3390/app11188299.

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In this paper, we address the problem of autonomous exploration in unknown environments for ground mobile robots with deep reinforcement learning (DRL). To effectively explore unknown environments, we construct an exploration graph considering historical trajectories, frontier waypoints, landmarks, and obstacles. Meanwhile, to take full advantage of the spatiotemporal feature and historical information in the autonomous exploration task, we propose a novel network called Spatiotemporal Neural Network on Graph (Graph-STNN). Specifically, the proposed Graph-STNN extracts the spatial feature using graph convolutional network (GCN) and the temporal feature using temporal convolutional network (TCN). Then, gated recurrent unit (GRU) is performed to synthesize the spatial feature, the temporal feature, and the historical state information into the current state feature. Combined with DRL, our Graph-STNN helps estimation of the optimal target point through extracted hybrid features. The simulation experiment shows that our approach is more effective than the GCN-based approach and the information entropy-based approach. Moreover, Graph-STNN also performs better generalization ability than GCN-based, information entropy-based, and random methods. Finally, we validate our approach on the simulation platform Stage with the actual robot model.

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Madhavan, Advait, Matthew W. Daniels, and Mark D. Stiles. "Temporal State Machines: Using Temporal Memory to Stitch Time-based Graph Computations." ACM Journal on Emerging Technologies in Computing Systems 17, no. 3 (May 11, 2021): 1–27. http://dx.doi.org/10.1145/3451214.

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Race logic, an arrival-time-coded logic family, has demonstrated energy and performance improvements for applications ranging from dynamic programming to machine learning. However, the various ad hoc mappings of algorithms into hardware rely on researcher ingenuity and result in custom architectures that are difficult to systematize. We propose to associate race logic with the mathematical field of tropical algebra, enabling a more methodical approach toward building temporal circuits. This association between the mathematical primitives of tropical algebra and generalized race logic computations guides the design of temporally coded tropical circuits. It also serves as a framework for expressing high-level timing-based algorithms. This abstraction, when combined with temporal memory, allows for the systematic exploration of race logic–based temporal architectures by making it possible to partition feed-forward computations into stages and organize them into a state machine. We leverage analog memristor-based temporal memories to design such a state machine that operates purely on time-coded wavefronts. We implement a version of Dijkstra’s algorithm to evaluate this temporal state machine. This demonstration shows the promise of expanding the expressibility of temporal computing to enable it to deliver significant energy and throughput advantages.

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Zhang, Zhen, Jiajun Bu, Zhao Li, Chengwei Yao, Can Wang, and Jia Wu. "TigeCMN: On exploration of temporal interaction graph embedding via Coupled Memory Neural Networks." Neural Networks 140 (August 2021): 13–26. http://dx.doi.org/10.1016/j.neunet.2021.02.016.

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Andrienko, Natalia, and Gennady Andrienko. "State Transition Graphs for Semantic Analysis of Movement Behaviours." Information Visualization 17, no. 1 (February 1, 2017): 41–65. http://dx.doi.org/10.1177/1473871617692841.

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A behaviour can be defined as a sequence of states or activities occurring one after another. A behaviour consisting of a finite number of reoccurring states/activities may be represented by a directed weighted graph with nodes and edges corresponding, respectively, to the possible states and transitions between them, while the weights represent the probabilities or frequencies of the state and transition occurrences. The same applies to multiple behaviours sharing the same set of possible states. In analysis of movement data, state transition graphs can be used to represent semantic abstractions of mobility behaviours, where states correspond to semantic categories of visited places (such as ‘home’, ‘work’, ‘shop’), activities of moving objects (‘driving’, ‘walking’, ‘exercising’, etc.) or characteristics of the movement (‘straight movement’, ‘sharp turn’, ‘acceleration’, ‘stop’, etc.). Such a representation supports the exploration and analysis of the semantic aspect (i.e. the meaning or purposes) of movement. For comprehensive analysis of movement data, state transition graphs need to be combined with representations reflecting the spatial and temporal aspects of the movement. This requires appropriate coordination between different visual displays (graphs, maps and temporal views) and appropriate reaction to analytical operations applied to any of the representations of the same data. We define in an abstract way the reactions of a graph display to analytical operations of querying, partitioning and direct selection. We also propose visual and interactive display features supporting comparisons between data subsets and between results of different operations. We demonstrate the use of the display features by examples of real-world and synthetic data sets.

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Kim, Sung-Kyun, Amanda Bouman, Gautam Salhotra, David D. Fan, Kyohei Otsu, Joel Burdick, and Ali-akbar Agha-mohammadi. "PLGRIM: Hierarchical Value Learning for Large-scale Exploration in Unknown Environments." Proceedings of the International Conference on Automated Planning and Scheduling 31 (May 17, 2021): 652–62. http://dx.doi.org/10.1609/icaps.v31i1.16014.

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In order for an autonomous robot to efficiently explore an unknown environment, it must account for uncertainty in sensor measurements, hazard assessment, localization, and motion execution. Making decisions for maximal reward in a stochastic setting requires value learning and policy construction over a belief space, i.e., probability distribution over all possible robot-world states. However, belief space planning in a large spatial environment over long temporal horizons suffers from severe computational challenges. Moreover, constructed policies must safely adapt to unexpected changes in the belief at runtime. This work proposes a scalable value learning framework, PLGRIM (Probabilistic Local and Global Reasoning on Information roadMaps), that bridges the gap between (i) local, risk-aware resiliency and (ii) global, reward-seeking mission objectives. Leveraging hierarchical belief space planners with information-rich graph structures, PLGRIM addresses large-scale exploration problems while providing locally near-optimal coverage plans. We validate our proposed framework with high-fidelity dynamic simulations in diverse environments and on physical robots in Martian-analog lava tubes.

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Muoka, Pascal, Daniel Onwuchekwa, and Roman Obermaisser. "Adaptive Scheduling for Time-Triggered Network-on-Chip-Based Multi-Core Architecture Using Genetic Algorithm." Electronics 11, no. 1 (December 24, 2021): 49. http://dx.doi.org/10.3390/electronics11010049.

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Adaptation in time-triggered systems can be motivated by energy efficiency, fault recovery, and changing environmental conditions. Adaptation in time-triggered systems is achieved by preserving temporal predictability through metascheduling techniques. Nevertheless, utilising existing metascheduling schemes for time-triggered network-on-chip architectures poses design time computation and run-time storage challenges for adaptation using the resulting schedules. In this work, an algorithm for path reconvergence in a multi-schedule graph, enabled by a reconvergence horizon, is presented to manage the state-space explosion problem resulting from an increase in the number of scenarios required for adaptation. A meta-scheduler invokes a genetic algorithm to solve a new scheduling problem for each adaptation scenario, resulting in a multi-schedule graph. Finally, repeated nodes of the multi-schedule graph are merged, and further exploration of paths is terminated. The proposed algorithm is evaluated using various application model sizes and different horizon configurations. Results show up to 56% reduction of schedules necessary for adaptation to 10 context events, with the reconvergence horizon set to 50 time units. Furthermore, 10 jobs with 10 slack events and a horizon of 40 ticks result in a 23% average sleep time for energy savings. Furthermore, the results demonstrate the reduction in the state-space size while showing the trade-off between the size of the reconvergence horizon and the number of nodes of the multi-schedule graph.

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Wang, Dongjie, Pengyang Wang, Kunpeng Liu, Yuanchun Zhou, Charles E. Hughes, and Yanjie Fu. "Reinforced Imitative Graph Representation Learning for Mobile User Profiling: An Adversarial Training Perspective." Proceedings of the AAAI Conference on Artificial Intelligence 35, no. 5 (May 18, 2021): 4410–17. http://dx.doi.org/10.1609/aaai.v35i5.16567.

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In this paper, we study the problem of mobile user profiling, which is a critical component for quantifying users' characteristics in the human mobility modeling pipeline. Human mobility is a sequential decision-making process dependent on the users' dynamic interests. With accurate user profiles, the predictive model can perfectly reproduce users' mobility trajectories. In the reverse direction, once the predictive model can imitate users' mobility patterns, the learned user profiles are also optimal. Such intuition motivates us to propose an imitation-based mobile user profiling framework by exploiting reinforcement learning, in which the agent is trained to precisely imitate users' mobility patterns for optimal user profiles. Specifically, the proposed framework includes two modules: (1) representation module, that produces state combining user profiles and spatio-temporal context in real-time; (2) imitation module, where Deep Q-network (DQN) imitates the user behavior (action) based on the state that is produced by the representation module. However, there are two challenges in running the framework effectively. First, epsilon-greedy strategy in DQN makes use of the exploration-exploitation trade-off by randomly pick actions with the epsilon probability. Such randomness feeds back to the representation module, causing the learned user profiles unstable. To solve the problem, we propose an adversarial training strategy to guarantee the robustness of the representation module. Second, the representation module updates users' profiles in an incremental manner, requiring integrating the temporal effects of user profiles. Inspired by Long-short Term Memory (LSTM), we introduce a gated mechanism to incorporate new and old user characteristics into the user profile. In the experiment, we evaluate our proposed framework on real-world datasets. The extensive experimental results validate the superiority of our method comparing to baseline algorithms.

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Luo, Xiao, Hui Hong, Shuyue Wang, Kaicheng Li, Qingze Zeng, Luwei Hong, Xiaocao Liu, et al. "Exploration of the Mechanism Underlying the Association of Incident Microinfarct and Motor Deficit: A Preliminary Functional MRI Study." Journal of Alzheimer's Disease 85, no. 4 (February 15, 2022): 1545–54. http://dx.doi.org/10.3233/jad-215227.

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Background: Cerebral microinfarcts (CMIs) might cause measurable disruption to brain connections and are associated with cognitive decline, but the association between CMIs and motor impairment is still unclear. Objective: To assess the CMIs effect on motor function in vivo and explore the potential neuropathological mechanism based on graph-based network method. Methods: We identified 133 non-demented middle-aged and elderly participants who underwent MRI scanning, cognitive, and motor assessment. The short physical performance battery (SPPB) assessed motor function, including balance, walking speed, and chair stand. We grouped participants into 34 incident CMIs carriers and 99 non-CMIs carriers as controls, depending on diffusion-weighted imaging. Then we assessed the independent CMIs effects on motor function and explored neural mechanisms of CMIs on motor impairment via mapping of degree centrality (DC) and eigenvector centrality (EC). Results: CMIs carriers had worse motor function than non-carriers. Linear regression analyses showed that CMIs independently contributed to motor function. CMIs carriers had decreased EC in the precuneus, while increased DC and EC in the middle temporal gyrus and increased DC in the inferior frontal gyrus compared to controls (p < 0.05, corrected). Correlation analyses showed that EC of precuneus was related to SPPB (r = 0.25) and balance (r = 0.27); however, DC (r = –0.25) and EC (r = –0.25) of middle temporal gyrus was related with SPPB in all participants (p < 0.05, corrected). Conclusion: CMIs represent an independent risk factor for motor dysfunction. The relationship between CMIs and motor function may be attributed to suppression of functional hub region and compensatory activation of motor-related regions.

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Sheppard, John Patrick, Ji-Ping Wang, and Patrick C. M. Wong. "Large-scale Cortical Network Properties Predict Future Sound-to-Word Learning Success." Journal of Cognitive Neuroscience 24, no. 5 (May 2012): 1087–103. http://dx.doi.org/10.1162/jocn_a_00210.

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The human brain possesses a remarkable capacity to interpret and recall novel sounds as spoken language. These linguistic abilities arise from complex processing spanning a widely distributed cortical network and are characterized by marked individual variation. Recently, graph theoretical analysis has facilitated the exploration of how such aspects of large-scale brain functional organization may underlie cognitive performance. Brain functional networks are known to possess small-world topologies characterized by efficient global and local information transfer, but whether these properties relate to language learning abilities remains unknown. Here we applied graph theory to construct large-scale cortical functional networks from cerebral hemodynamic (fMRI) responses acquired during an auditory pitch discrimination task and found that such network properties were associated with participants' future success in learning words of an artificial spoken language. Successful learners possessed networks with reduced local efficiency but increased global efficiency relative to less successful learners and had a more cost-efficient network organization. Regionally, successful and less successful learners exhibited differences in these network properties spanning bilateral prefrontal, parietal, and right temporal cortex, overlapping a core network of auditory language areas. These results suggest that efficient cortical network organization is associated with sound-to-word learning abilities among healthy, younger adults.

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Garcia, Matt. "Network Exploration of Interdistrict School Choice Over Time in a Mandatory Open Enrollment State." Teachers College Record: The Voice of Scholarship in Education 123, no. 9 (September 2021): 171–98. http://dx.doi.org/10.1177/01614681211052006.

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Background: Early studies of district-level outcomes of interdistrict school choice policies found changes in how districts interact with one another and changes in districts’ per-pupil expenditures. More recent studies suggest that wider social and political consequences may result from interdistrict choice policies. Purpose: In Colorado, interdistrict school choice participation increased from 4.64% participation in the 2003–2004 fiscal year to almost 10% participation in the 2016–2017 fiscal year, shifting more than $7.79 billion in per-pupil revenue in the process. This suggests a corresponding shift in the social organization of schooling under Colorado’s statewide interdistrict school choice policy. Research Design: Quantitative studies on school choice policies typically examine the factors leading to individual choices when choosing schools or the individual outcomes of those choices. This study takes a different approach to quantitative analysis of school choice by employing separable temporal exponential random graph modeling (STERGM), a network analysis method, to examine patterns of student-enrollment ties that are created between school districts when students enroll outside their district of residence. Conclusions/Recommendations: School district leaders and policy makers should be cognizant of changes to the organization of education and the fiscal impact of those changes—especially given that findings from this study suggest that these changes may be out of their hands. Findings may have indirect impacts on matters such as mill levy and bond evaluations by way of total program formula calculations and may suggest a hidden destabilization of democratic processes, such as losing the interest of voters who send their students to a school in another district.

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Marco Salas, Sergio, Xiao Yuan, Christer Sylven, Mats Nilsson, Carolina Wählby, and Gabriele Partel. "De novo spatiotemporal modelling of cell-type signatures in the developmental human heart using graph convolutional neural networks." PLOS Computational Biology 18, no. 8 (August 12, 2022): e1010366. http://dx.doi.org/10.1371/journal.pcbi.1010366.

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With the emergence of high throughput single cell techniques, the understanding of the molecular and cellular diversity of mammalian organs have rapidly increased. In order to understand the spatial organization of this diversity, single cell data is often integrated with spatial data to create probabilistic cell maps. However, targeted cell typing approaches relying on existing single cell data achieve incomplete and biased maps that could mask the true diversity present in a tissue slide. Here we applied a de novo technique to spatially resolve and characterize cellular diversity of in situ sequencing data during human heart development. We obtained and made accessible well defined spatial cell-type maps of fetal hearts from 4.5 to 9 post conception weeks, not biased by probabilistic cell typing approaches. With our analysis, we could characterize previously unreported molecular diversity within cardiomyocytes and epicardial cells and identified their characteristic expression signatures, comparing them with specific subpopulations found in single cell RNA sequencing datasets. We further characterized the differentiation trajectories of epicardial cells, identifying a clear spatial component on it. All in all, our study provides a novel technique for conducting de novo spatial-temporal analyses in developmental tissue samples and a useful resource for online exploration of cell-type differentiation during heart development at sub-cellular image resolution.

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Weber, Hannes, Marc Schwenzer, and Steffen Hillmert. "Homophily in the formation and development of learning networks among university students." Network Science 8, no. 4 (April 14, 2020): 469–91. http://dx.doi.org/10.1017/nws.2020.10.

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AbstractStudents’ personal learning networks can be a valuable resource of success in higher education: they offer opportunities for academic and personal support and provide sources of information related to exams or homework. We study the determinants of learning networks using a panel study among university students in their first and second year of study. A long-standing question in social network analysis has been whether the tendency of individuals with similar characteristics to form ties is a result of preferences “choice homophily” or rather selective opportunities “induced homophily”. We expect a latent preference for homophilic learning partnerships with regard to attributes, such as gender, ability, and social origin. We estimate recently developed temporal exponential random graph models to control for previous network structure and study changes in learning ties among students. The results show that especially for males, same-gender partnerships are preferred over heterogeneous ties, while chances for tie formation decrease with the difference in academic ability among students. Social origin is a significant factor in the crosssectional exploration but does appear to be less important in the formation of new (strong) partnerships during the course of studies.

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Gao, Meng, Chenji Wei, Xiangguo Zhao, Ruijie Huang, Jian Yang, and Baozhu Li. "Production Forecasting Based on Attribute-Augmented Spatiotemporal Graph Convolutional Network for a Typical Carbonate Reservoir in the Middle East." Energies 16, no. 1 (December 29, 2022): 407. http://dx.doi.org/10.3390/en16010407.

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Production forecasting plays an important role in development plans during the entire period of petroleum exploration and development. Artificial intelligence has been extensively investigated in recent years because of its capacity to extensively analyze and interpret complex data. With the emergence of spatiotemporal models that can integrate graph convolutional networks (GCN) and recurrent neural networks (RNN), it is now possible to achieve multi-well production prediction by considering the impact of interactions between producers and historical production data simultaneously. Moreover, an accurate prediction not only depends on historical production data but also on the influence of neighboring injectors’ historical gas injection rate (GIR). Therefore, based on the assumption that introducing GIR can enhance prediction accuracy, this paper proposes a deep learning-based hybrid production forecasting model that is aimed at considering both the spatiotemporal characteristics of producers and the GIR of neighboring injectors. Specifically, we integrated spatiotemporal characteristics and GIR into an attribute-augmented spatiotemporal graph convolutional network (AST-GCN) and gated recurrent units (GRU) neural network to extract intricate temporal correlations from historical data. The method proposed in this paper has been successfully applied in a well pattern (including five producers and seven gas injectors) in a low-permeability carbonate reservoir in the Middle East. In single well production forecasting, the error of AST-GCN is 63.2%, 37.3%, and 16.1% lower in MedAE, MAE, and RMSE compared with GRU and 62.9%, 44.6%, and 28.9% lower compared with RNS. Similarly, the accuracy of AST-GCN is 15.9% and 35.8% higher than GRU and RNS in single well prediction. In well-pattern production forecasting, the error of AST-GCN is 41.2%, 64.2%, and 75.2% lower in RMSE, MAE, and MedAE compared with RNS, while the accuracy of AST-GCN is 29.3% higher. After different degrees of Gaussian noise are added to the actual data, the average change in AST-GCN is 3.3%, 0.4%, and 1.2% in MedAE, MAE, and RMSE, which indicates the robustness of the proposed model. The results show that the proposed model can consider the production data, gas injection data, and spatial correlation at the same time, which performs well in oil production forecasts.

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Ramisch, Arne, Alexander Brauser, Mario Dorn, Cecile Blanchet, Brian Brademann, Matthias Köppl, Jens Mingram, et al. "VARDA (VARved sediments DAtabase) – providing and connecting proxy data from annually laminated lake sediments." Earth System Science Data 12, no. 3 (September 25, 2020): 2311–32. http://dx.doi.org/10.5194/essd-12-2311-2020.

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Abstract. Varved lake sediments provide climatic records with seasonal to annual resolution and low associated age uncertainty. Robust and detailed comparison of well-dated and annually laminated sediment records is crucial for reconstructing abrupt and regionally time-transgressive changes as well as validation of spatial and temporal trajectories of past climatic changes. The VARved sediments DAtabase (VARDA) presented here is the first data compilation for varve chronologies and associated palaeoclimatic proxy records. The current version 1.0 allows detailed comparison of published varve records from 95 lakes. VARDA is freely accessible and was created to assess outputs from climate models with high-resolution terrestrial palaeoclimatic proxies. VARDA additionally provides a technical environment that enables us to explore the database of varved lake sediments using a connected data model and can generate a state-of-the-art graphic representation of a multisite comparison. This allows the reassessment of existing chronologies and tephra events to synchronize and compare even distant varved lake records. Furthermore, the present version of VARDA permits the exploration of varve thickness data. In this paper, we report in detail on the data-mining and compilation strategies for the identification of varved lakes and assimilation of high-resolution chronologies, as well as the technical infrastructure of the database. Additional palaeoclimatic proxy data will be provided in forthcoming updates. The VARDA graph database and user interface can be accessed online at https://varve.gfz-potsdam.de (last access: 15 September 2020), all datasets of version 1.0 are available at https://doi.org/10.5880/GFZ.4.3.2019.003 (Ramisch et al., 2019).

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Su, Na, and Zhenbo Wang. "Visual Analysis of Global Carbon Mitigation Research Based on Scientific Knowledge Graphs." International Journal of Environmental Research and Public Health 19, no. 9 (May 9, 2022): 5766. http://dx.doi.org/10.3390/ijerph19095766.

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Global temperature change is related to the destiny of all mankind, and carbon mitigation, as well as greenhouse gases control, are key points. In order to explore the basic knowledge, research hotspots and trends in global carbon mitigation research, this paper, based on 15,304 carbon mitigation articles from Web of Science, from 1991 to 2021, conducts spatio-temporal distribution, country distribution, research hotspots and cooperation network analysis, and draws frontier knowledge graphs of carbon mitigation by using CiteSpace, Gephi and other scientific knowledge mapping and literature analysis software. The key scholars, important literature, main contribution institutions and countries/regions in the field of carbon mitigation research were extracted, and the research basis and evolution law were displayed. The study found that: (1) The research on carbon mitigation is increasing every year, which can be roughly divided into four stages: germination, low-speed development, medium-speed development and high-speed development. (2) The spatial distribution of carbon mitigation research is unbalanced, mainly showing a characteristic of “one super and many strong” centered on the United States. (3) The research hotspots of carbon mitigation have gradually evolved from phenomenon analysis, policy guidance, method exploration to mechanism improvement. Further research might focus on ocean carbon sink, carbon trading and carbon-negative technology.

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Trivellone, Valeria, Christopher H. Dietrich, Dmitry Dmitriev, and Matthew Yoder. "TaxonWorks: A Use Case in Documenting Complex Biological Relationships." Biodiversity Information Science and Standards 2 (May 22, 2018): e25723. http://dx.doi.org/10.3897/biss.2.25723.

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Compilation and retrieval of reliable data on biological interactions is one of the critical bottlenecks affecting efficiency and statistical power in testing ecological theories. TaxonWorks, a web-based workbench, can facilitate such research by enabling the digitization of complex biological interactions involving multiple species, individuals, and trophic levels. These data can be further organized into spatial and temporal axes, and annotated at the level of individual or grouped interactions (e.g. singularly citing the combined elements of a tritrophic interaction). The simple, customizable nature of tools ultimately reduces the time-consuming steps of data gathering, cleaning, and formatting of datasets for subsequent exploration and analysis while also improving the asserted semantics. An example use case is provided with a dataset of associations among plants, pathogens and insect vectors. The curated data are accessed through the JSON serving TaxonWorks API (Application Programming Interface) by an R package. Analysis and visualization of the network graphs persisted in TaxonWorks is demonstrated using core R functionality and the igraph package (Csardi and Nepusz 2006). TaxonWorks is open-source, collaboratively built software available at http://taxonworks.org.

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Chen, Jarvis T., Jason Beckfield, Pamela D. Waterman, and Nancy Krieger. "Can Changes in the Distributions of and Associations Between Education and Income Bias Temporal Comparisons of Health Disparities? An Exploration With Causal Graphs and Simulations." American Journal of Epidemiology 177, no. 9 (April 7, 2013): 870–81. http://dx.doi.org/10.1093/aje/kwt041.

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Andrienko, Gennady, and Natalia Andrienko. "Creating Maps of Artificial Spaces for Exploring Trajectories." Abstracts of the ICA 1 (July 15, 2019): 1–2. http://dx.doi.org/10.5194/ica-abs-1-9-2019.

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Abstract. We propose an approach to interactive visual exploration of trajectories of moving objects in which trajectories are mapped onto different coordinate systems enabling the analyst to look at different aspects of the movement. Geographic visualization techniques can be applied to these coordinate systems in the same way as in usual geographic maps. Movement, i.e., changes of spatial positions of discrete objects, is a complex phenomenon comprising many aspects [1].Maps showing the object tracks in space are essential for analysing movement in relation to the spatial context. However, maps alone are insufficient for representing various dynamic attributes of the movement, and they are usually combined with other types of visual displays. The most commonly used display type is the time graph, i.e., a line chart with one dimension representing time and the other dimension used for encoding attribute values. There are examples of similar displays where time is substituted by a relative distance along a path. This idea can be generalized so that two display dimensions represent any two dynamic attributes, which is the basis of our approach.Data describing movements of discrete objects consist of records that include time stamps and spatial positions (coordinates) of the objects at the specified times. Such data are commonly called trajectories. Trajectory records may also include values of dynamic attributes characterizing the movement of the moving objects, such as speed or heart rate, and they can be extended with values of various attributes derivable from the positions and times. Trajectories are typically represented in a map by lines connecting spatial positions of objects in the chronological order. This is analogous to representing trajectories in a line chart by connecting positions corresponding to attribute values at different times. Our idea is to treat such line charts as maps representing artificial spaces. This gives us an opportunity to use a uniform set of visualization and interaction techniques for map displays based on both physical and artificial spaces. To create an artificial space and a corresponding map, the analyst selects two attributes that will form the space dimensions. The analyst may choose to build either a Cartesian or a polar coordinate system. Depending on the value ranges of the attributes, the analyst may set a scaling factor for one of the dimensions. The analyst may also create a map layer with labelled axes or grid lines corresponding to specified attribute values. Examples of maps of artificial spaces are given in Fig. 2 and Fig. 3. They are based on a set of 5,045 trajectories of flights that arrived to the airports of London in the period December 1-4, 2016. Fig. 1 shows these trajectories in the geographic space. One selected trajectory is marked in black in all displays in Figs. 1-3.Fig. 1 demonstrates usual map displays, in which cartographic visualization techniques are used to represent attribute values associated with trajectories or their segments. On the left, the colouring of the lines encodes the landing directions, from which the eastern (green) and western (purple) ones notably prevail. On the right, colouring is applied to segments of the trajectories, so that red represents holding loops [2], when pilots wait for a permission to land. Figs. 2-3 demonstrate the use of the same visualization techniques in maps based on artificial spaces. In Fig. 2, the lines arecoloured according to the landing directions, and we can see that the western landing direction was used till themorning of the second day and then gave way to the eastern direction. In Fig. 3, red and blue colours discriminate theholding loops from the remaining parts of the flights.We see (top left of Fig.3) that the loops are especially frequent in the times from about 8 till about 17:30 o’clock, which corresponds to high frequency of arrivals in these times. We see (top right and bottom left) two major ranges of the distance to the destination in which the loops take place, and we see (bottom left and right) the range of altitudes at which the loops are made. These displays also show us that the airplanes descend stepwise, and the altitude decreases when they make loops.Map displays based on artificial spaces allow the same interactive operations as usual map displays: zooming, panning, switching on and off the drawing of map layers, changing the appearances of objects in the layers (colour, line thickness, transparency, etc.), interactive selection of objects, which become marked in all currently existing displays (see an example in Figs. 1-3). All maps are responsive to interactive filtering, which may involve various types of query conditions [1]: spatial, temporal, and thematic, i.e., based on attribute values. Moreover, a spatial filter can be interactively set directly in a map display, e.g., by drawing one or more “windows” selecting regions in space. The same can be done in maps based on artificial spaces. Such a filter selects objects based on the values of the attributes represented by the space dimensions. All kinds of filtering affect all currently existing displays, which are coordinated in this way.We conclude that map displays employing cartographic visualization techniques for representing data can be based not only on the geographical space, but also on various artificial spaces. The latter can be created from attributes present in or derived from the data. Maps based on such spaces support exploration of various aspects of the data.

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Maksimov, L. A., and G. V. Vedernikov. "APPLICATION OF THE TECHNOLOGY OF PASSIVE–ACTIVE CDP SURVEY (CDP PAS) FOR REGIONAL EVALUATION OF PETROLEUM POTENTIAL OF THE SEPANOVSKOYE DOME-SHAPED UPLIFT OF THE EAST PAIDUGINA DEPRESSION." Geology and mineral resources of Siberia, no. 2 (2021): 46–55. http://dx.doi.org/10.20403/2078-0575-2021-2-46-55.

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The results of application of the innovative CDP PAS technology on the materials of seismic operations along regional CDP profiles with a total length of 2171 linear km clarifying the southeastern part of the Tomsk region are given. This technology is based on the analysis of spatial-temporal intervals of CDP seismograms up to the first arrivals of induced waves, which provides additional characteristics of emission waves. The working results are presented by spectra and graphs of activity of geodynamic noises in comparison with time sections and the scheme of the spatial position of these data. Areas of anomalous noise values that allow researchers to predict the presence of hydrocarbon accumulations within their boundaries have been identified for all profiles. The results obtained make it possible to assess the oil bearing capacity of this territory rather highly. In Tomsk region, these prospects should be associated mainly with specific non-anti cline traps located near suture zones- long-lived tectonic faults that are possible channels for the migration of deep hydrocarbons. The data obtained indicate an increase in petroleum potential in the southern direction, that is important for the development strategy of this district. The territory of the Stepanovskoye dome mesoelevation appears to be the primary target for the buildup of prospecting and exploration here.

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Bumpus, Benjamin Merlin, and Kitty Meeks. "Edge Exploration of Temporal Graphs." Algorithmica, August 22, 2022. http://dx.doi.org/10.1007/s00453-022-01018-7.

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AbstractWe introduce a natural temporal analogue of Eulerian circuits and prove that, in contrast to the static case, it is $${\textsc {NP}}$$ NP -hard to determine whether a given temporal graph is temporally Eulerian even if strong restrictions are placed on the structure of the underlying graph and each edge is active at only three times. However, we do obtain an $${\textsc {FPT}}$$ FPT -algorithm with respect to a new parameter called interval-membership-width which restricts the times assigned to different edges; we believe that this parameter will be of independent interest for other temporal graph problems. Our techniques also allow us to resolve two open questions of Akrida, Mertzios and Spirakis [CIAC 2019] concerning a related problem of exploring temporal stars.

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Li, Shunlong, Jin Niu, and Zhonglong Li. "Novelty detection of cable-stayed bridges based on cable force correlation exploration using spatiotemporal graph convolutional networks." Structural Health Monitoring, February 12, 2021, 147592172098866. http://dx.doi.org/10.1177/1475921720988666.

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The novelty detection of bridges using monitoring data is an effective technique for diagnosing structural changes and possible damages, providing a critical basis for assessing the structural states of bridges. As cable forces describe the state of cable-stayed bridges, a novelty detection method was developed in this study using spatiotemporal graph convolutional networks by analysing spatiotemporal correlations among cable forces determined from different cable dynamometers. The spatial dependency of the sensor network was represented as a directed graph with cable dynamometers as vertices, and a graph convolutional network with learnable adjacency matrices was used to capture the spatial dependency of the locally connected vertices. A one-dimensional convolutional neural network was operated along the time axis to capture the temporal dependency. Sensor faults and structural variations could be distinguished based on the local or global anomalies of the spatiotemporal model parameters. Faulty sensors were detected and isolated using weighted adjacency matrices along with diagnostic indicators of the model residuals. After eliminating the effect of the sensor fault, the underlying variations in the state of the cable-stayed bridge could be determined based on the changing data patterns of the spatiotemporal model. The application of the proposed method to a long-span cable-stayed bridge demonstrates its effectiveness in sensor fault localization and structural variation detection.

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Zhang, Pengfei, Yanli Jiang, Guangyao Liu, Jiao Han, Jun Wang, Laiyang Ma, Wanjun Hu, and Jing Zhang. "Altered brain functional network dynamics in classic trigeminal neuralgia: a resting-state functional magnetic resonance imaging study." Journal of Headache and Pain 22, no. 1 (December 2021). http://dx.doi.org/10.1186/s10194-021-01354-z.

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Abstract Background Accumulating studies have indicated a wide range of brain alterations with respect to the structure and function of classic trigeminal neuralgia (CTN). Given the dynamic nature of pain experience, the exploration of temporal fluctuations in interregional activity covariance may enhance the understanding of pain processes in the brain. The present study aimed to characterize the temporal features of functional connectivity (FC) states as well as topological alteration in CTN. Methods Resting-state functional magnetic resonance imaging and three-dimensional T1-weighted images were obtained from 41 CTN patients and 43 matched healthy controls (HCs). After group independent component analysis, sliding window based dynamic functional network connectivity (dFNC) analysis was applied to investigate specific FC states and related temporal properties. Then, the dynamics of the whole brain topological organization were estimated by calculating the coefficient of variation of graph-theoretical properties. Further correlation analyses were performed between all these measurements and clinical data. Results Two distinct states were identified. Of these, the state 2, characterized by complicated coupling between default mode network (DMN) and cognitive control network (CC) and tight connections within DMN, was expressed more in CTN patients and presented as increased fractional windows and dwell time. Moreover, patients switched less frequently between states than HCs. Regarding the dynamic topological analysis, disruptions in global graph-theoretical properties (including network efficiency and small-worldness) were observed in patients, coupled with decreased variability in nodal efficiency of anterior cingulate cortex (ACC) in the salience network (SN) and the thalamus and caudate nucleus in the subcortical network (SC). The variation of topological properties showed negative correlation with disease duration and attack frequency. Conclusions The present study indicated disrupted flexibility of brain topological organization under persistent noxious stimulation and further highlighted the important role of “dynamic pain connectome” regions (including DMN/CC/SN) in the pathophysiology of CTN from the temporal fluctuation aspect. Additionally, the findings provided supplementary evidence for current knowledge about the aberrant cortical-subcortical interaction in pain development.

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Krammer, Werner, John H. Missimer, Simon Habegger, Manuela Pastore-Wapp, Roland Wiest, and Bruno J. Weder. "Sensing form - finger gaiting as key to tactile object exploration - a data glove analysis of a prototypical daily task." Journal of NeuroEngineering and Rehabilitation 17, no. 1 (September 3, 2020). http://dx.doi.org/10.1186/s12984-020-00755-6.

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Abstract Background Motor hand skill and associated dexterity is important for meeting the challenges of daily activity and an important resource post-stroke. In this context, the present study investigated the finger movements of right-handed subjects during tactile manipulation of a cuboid, a prototypical task underlying tactile exploration. During one motor act, the thumb and fingers of one hand surround the cuboid in a continuous and regular manner. While the object is moved by the guiding thumb, the opposed supporting fingers are replaced once they reach their joint limits by free fingers, a mechanism termed finger gaiting. Methods For both hands of 22 subjects, we acquired the time series of consecutive manipulations of a cuboid at a frequency of 1 Hz, using a digital data glove consisting of 29 sensors. Using principle component analysis, we decomposed the short action into motor patterns related to successive manipulations of the cuboid. The components purport to represent changing grasp configurations involving the stabilizing fingers and guiding thumb. The temporal features of the components permits testing whether the distinct configurations occur at the frequency of 1 Hz, i.e. within the time window of 1 s, and, thus, taxonomic classification of the manipulation as finger gaiting. Results The fraction of variance described by the principal components indicated that three components described the salient features of the single motor acts for each hand. Striking in the finger patterns was the prominent and varying roles of the MCP and PIP joints of the fingers, and the CMC joint of the thumb. An important aspect of the three components was their representation of distinct finger configurations within the same motor act. Principal component and graph theory analysis confirmed modular, functionally synchronous action of the involved joints. The computation of finger trajectories in one subject illustrated the workspace of the task, which differed for the right and left hands. Conclusion In this task one complex motor act of 1 s duration could be described by three elementary and hierarchically ordered grasp configurations occurring at the prescribed frequency of 1 Hz. Therefore, these configurations represent finger gaiting, described until now only in artificial systems, as the principal mechanism underlying this prototypical task. Trial registration clinicaltrials.gov, NCT02865642, registered 12 August 2016.

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Mallick, Antik, Mohammad Khairul Bashar, Daniel S. Truesdell, Benton H. Calhoun, Siddharth Joshi, and Nikhil Shukla. "Using synchronized oscillators to compute the maximum independent set." Nature Communications 11, no. 1 (September 17, 2020). http://dx.doi.org/10.1038/s41467-020-18445-1.

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Abstract Not all computing problems are created equal. The inherent complexity of processing certain classes of problems using digital computers has inspired the exploration of alternate computing paradigms. Coupled oscillators exhibiting rich spatio-temporal dynamics have been proposed for solving hard optimization problems. However, the physical implementation of such systems has been constrained to small prototypes. Consequently, the computational properties of this paradigm remain inadequately explored. Here, we demonstrate an integrated circuit of thirty oscillators with highly reconfigurable coupling to compute optimal/near-optimal solutions to the archetypally hard Maximum Independent Set problem with over 90% accuracy. This platform uniquely enables us to characterize the dynamical and computational properties of this hardware approach. We show that the Maximum Independent Set is more challenging to compute in sparser graphs than in denser ones. Finally, using simulations we evaluate the scalability of the proposed approach. Our work marks an important step towards enabling application-specific analog computing platforms to solve computationally hard problems.

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Zhu, Yucheng, Xiongkuo Min, Dandan Zhu, Guangtao Zhai, Xiaokang Yang, Wenjun Zhang, Ke Gu, and Jiantao Zhou. "Toward Visual Behavior and Attention Understanding for Augmented 360 Degree Videos." ACM Transactions on Multimedia Computing, Communications, and Applications, September 29, 2022. http://dx.doi.org/10.1145/3565024.

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Augmented reality (AR) overlays digital content onto reality. In an AR system, correct and precise estimations of user visual fixations and head movements can enhance the quality of experience by allocating more computational resources for analyzing, rendering and 3D registration on the areas of interest. However, there is inadequate research to help in understanding the visual explorations of the users when using an AR system or modeling AR visual attention. To bridge the gap between the saliency prediction on real-world scenes and on scenes augmented by virtual information, we construct the ARVR saliency dataset. The virtual reality (VR) technique is employed to simulate the real-world. Annotations of object recognition and tracking as augmented contents are blended into omnidirectional videos. The saliency annotations of head and eye movements for both original and augmented videos are collected and together constitute the ARVR dataset. We also design a model that is capable of solving the saliency prediction problem in AR. Local block images are extracted to simulate the viewport and offset the projection distortion. Conspicuous visual cues in the local block images are extracted to constitute the spatial features. The optical flow information is estimated as an important temporal feature. We also consider the interplay between virtual information and reality. The composition of the augmentation information is distinguished, and the joint effects of adversarial augmentation and complementary augmentation are estimated. The Markov chain is constructed with block images as graph nodes. In the determination of the edge weights, both the characteristics of the viewing behaviors and the visual saliency mechanisms are considered. The order of importance for block images is estimated through the state of equilibrium of the Markov chain. Extensive experiments are conducted to demonstrate the effectiveness of the proposed method.

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Hagen, Sal. "“Trump Shit Goes into Overdrive”: Tracing Trump on 4chan/pol/." M/C Journal 23, no. 3 (July 7, 2020). http://dx.doi.org/10.5204/mcj.1657.

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Content warning: although it was kept to a minimum, this text displays instances of (anti-Semitic) hate speech. During the 2016 U.S. election and its aftermath, multiple journalistic accounts reported on “alt-right trolls” emanating from anonymous online spaces like the imageboard 4chan (e.g. Abramson; Ellis). Having gained infamy for its nihilist trolling subcultures (Phillips, This Is Why) and the loose hacktivist movement Anonymous (Coleman), 4chan now drew headlines because of the alt-right’s “genuinely new” concoction of white supremacy, ironic Internet humour, and a lack of clear leadership (Hawley 50). The alt-right “anons”, as imageboard users call themselves, were said to primarily manifest on the “Politically Incorrect” subforum of 4chan: /pol/. Gradually, a sentiment arose in the titles of several news articles that the pro-Trump “alt-right trolls” had successfully won the metapolitical battle intertwined with the elections (Phillips, Oxygen 5). For instance, articles titled that “trolls” were “The Only True Winners of this Election” (Dewey) or even “Plotting a GOP Takeover” (Stuart).The headlines were as enticing as questionable. As trolling-expert Whitney Phillips headlined herself, the alt-right did not attain political gravity solely through its own efforts but rather was “Conjured Out of Pearl Clutching and Media Attention” (“The Alt-Right”), with news outlets being provoked to criticise, debunk, or sensationalise its trolling activities (Faris et al. 131; Phillips, “Oxygen” 5-6). Even with the right intentions, attempts at denouncement through using vague, structuralist notions–from “alt-right” and “trolls” to “the basket of deplorables” (Robertson) – arguably only strengthened the coherence of those it was meant to disavow (Phillips, Oxygen; Phillips et al.; Marantz). Phillips et al. therefore lamented such generalisations, arguing attributing Trump’s win to vague notions of “4chan”, “alt-right”, or “trolls” actually bestowed an “atemporal, almost godlike power” to what was actually an “ever-reactive anonymous online collective”. Therefore, they called to refrain from making claims about opaque spaces like 4chan without first “plotting the landscape” and “safeguarding the actual record”. Indeed, “when it comes to 4chan and Anonymous”, Phillips et al. warned, “nobody steps in the same river twice”.This text answers the call to map anonymous online groups by engaging with the complexity of testing the muddy waters of the ever-changing and dissimulative 4chan-current. It first argues how anti-structuralist research outlooks can answer to many of the pitfalls arising from this complex task. Afterwards, it traces the word trump as it was used on 4chan/pol/ to problematise some of the above-mentioned media narratives. How did anons consider Trump, and how did the /pol/-current change during the build-up of the 2016 U.S. elections and afterwards?On Researching Masked and Dissimulative ExtremistsWhile potentially playing into the self-imagination of malicious actors (Phillips et al.), the frequent appearance of overblown narratives on 4chan is unsurprising considering the peculiar affordances of imageboards. Imageboards are anonymous – no user account is required to post – and ephemeral – posts are deleted after a certain amount of activity, sometimes after days, sometimes after minutes (Bernstein et al.; Hagen). These affordances complicate studying collectives on imageboards, with the primary reasons being that 1) they prevent insights into user demographics, 2) they afford particularly dissimulative, playful discourse that can rarely be taken at face value (Auerbach; de Zeeuw and Tuters), and 3) the sheer volume of auto-deleted activity means one has to stay up-to-date with a rapid waterfall of subcultural ephemera. Additionally, the person stepping into the muddy waters of the chan-river also changes their gaze over time. For instance, Phillips bravely narrates how she once saw parts of the 4chan-stream as “fun” to only later realise the blatantly racist elements present from the start (“It Wasn’t Just”).To help render legible the changing currents of imageboard activity without relying on vague understandings of the “alt-right”, “trolls”, or “Anonymous”, anti-structuralist research outlooks form a possible answer. Around 1900, sociologists like Gabriel Tarde already argued to refrain from departing from structuralist notions of society and instead let social compositions arise through iterative tracing of minute imitations (11). As described in Bruno Latour’s Reassembling the Social, actor-network theory (ANT) revitalises the Tardean outlook by similarly criticising the notion of the “social” and “society” as distinct, sui-generis entities. Instead, ANT advocates tracing “flat” networks of agency made up of both human and non-human actors (165-72). By tracing actors and describing the emerging network of heterogeneous mediators and intermediaries (105), one can slowly but surely get a sense of collective life. ANT thus takes a page from ethnomethodology, which advocates a similar mapping of how participants of a group produce themselves as such (Garfinkel).For multiple reasons, anti-structuralist approaches like ANT can be useful in tracing elusive anonymous online groups and their changing compositions. First, instead of grasping collectives on imageboards from the outset through structuralist notions, as networked individuals, or as “amorphous and formless entities” (see e.g. Coleman 113-5), it only derives its composition after following where its actors lead. This can result in an empirical and literally objective mapping of their collectivity while refraining from mystifications and non-existent connections–so often present in popular narratives about “trolls” and the “alt-right”. At the same time, it allows prominent self-imaginations and mythologizations – or, in ANT-parlance, “localisations of the global” (Latour 173-190) – rise to the surface whenever they form important actors, which, as we will see, tends to happen on 4chan.Second, ANT offers a useful lens with which to consider how non-human actors can uphold a sense of collectivity within anonymous imageboards. This can include digital objects as part of the infrastructure–e.g. the automatically assigned post numbers having mythical value on 4chan (Beran, It Came From 69)–but also cultural objects like words or memes. Considering 4chan’s anonymity, this focus on objects instead of individuals is partly a necessity: one cannot know the exact amount and flow of users. Still, as this text seeks to show, non-human actors like words or memes can form suitable actors to map the changing collectivity of anonymous imageboard users in the absence of demographic insights.There are a few pitfalls worth noting when conducting ANT-informed research into extremist spaces like 4chan/pol/. The aforementioned ironic and dissimulative rhetoric of anonymous forum culture (de Zeeuw and Tuters) means tracing is complicated by implicit (yet omnipresent) intertextual references undecipherable to the untrained eye. Even worse, when misread or exaggerated, such tracing efforts can play into trolling tactics. This can in turn risk what Phillips calls “giving oxygen” to bigoted narratives by amplifying their presence (“Oxygen”). Since ANT does not prescribe what sort of description is needed (Latour 149), this exposure can be limited and/or critically engaged with by the researcher. Still, it is inevitable that research on extremist collectives adds at least some garbage to already polluted information ecologies (Phillips and Milner 2020), even when “just” letting the actors speak (Venturini). Indeed, this text will unfortunately also show hate speech terms below.These complications of irony and amplification can be somewhat mitigated by mixing ethnographic involvement with computational methods. Together, they can render implicit references explicit while also mapping broad patterns in imitation and preventing singular (misleading) actors from over-dominating the description. When done well, such descriptions do not only have to amplify but can also marginalise and trivialise. An accurate mapping can thereby counter sensationalist media narratives, as long as that is where the actors lead. It because of this potentiality that anti-structuralist tracing of extremist, dissimulative online groups should not be discarded outright.Stopping Momentarily to Test the WatersTo put the above into practice, what follows is a brief case study on the term trump on 4chan/pol/. Instead of following users, here the actor trump is taken an entry point for tracing various assemblages: not only referring to Donald J. Trump as an individual and his actions, but also to how /pol/-anons imagine themselves in relation to Trump. In this way, the actor trump is a fluid one: each of its iterations contains different boundaries and variants of its environment (de Laet and Mol 252). By following these environments, can we make sense of how the delirious 2016 U.S. election cycle played out on /pol/, a space described as the “skeleton key to the rise of Trump” (Beran, 4chan)?To trace trump, I use the 4plebs.com archive, containing almost all posts made on /pol/ between late-2013 and early 2018 (the time of research). I subsequently use two text mining methods to trace various connections between trump and other actors and use this to highlight specific posts. As Latour et al. note, computational methods allow “navigations” (593) of different data points to ensure diverse empirical perspectives, preventing both structuralist “zoomed-out” views and local contexts from over-dominating. Instead of moving between micro and macro views, such a navigation should therefore be understood as a “circulation” around the data, deploying various perspectives that each assemble the actors in a different way. In following this, the case study aims to demonstrate how, instead of a lengthy ethnographic account, a brief navigation using both quali- and quantitative perspectives can quickly demystify some aspects of seemingly nebulous online groups.Tracing trump: From Meme-Wizard to Anti-Semitic TargetTo get a sense of the centrality of Trump on /pol/, I start with post frequencies of trump assembled in two ways. The first (Figure 1) shows how, soon after the announcement of Trump’s presidential bid on 16 June 2015, around 100,000 comments mention the word (2% of the total amount of posts). The frequencies spike to a staggering 8% of all comments during the build-up to Trump’s win of the Republican nomination in early 2016 and presidential election in November 2016. Figure 1: The absolute and relative amount of posts on 4chan/pol/ containing the word trump (prefixes and suffixes allowed).To follow the traces between trump and the more general discourse surrounding it, I compiled a more general “trump-dense threads” dataset. These are threads containing thirty or more posts, with at least 15% of posts mentioning trump. As Figure 2 shows, at the two peaks, 8% of any thread on /pol/ was trump-dense, accounting for approximately 15,000 monthly threads. While Trump’s presence is unsurprising, these two views show just how incredibly central the former businessman was to /pol/ at the time of the 2016 U.S. election. Figure 2: The absolute and relative amount of threads on 4chan/pol/ that are “trump-dense”, meaning they have thirty comments or more, out of which at least 15% contain the word trump (prefixes and suffixes allowed).Instead of picking a certain moment from these aggregate overviews and moving to the “micro” (Latour et al.), I “circulate” further with Figure 3, showing another perspective on the trump-dense thread dataset. It shows a scatter plot of trump-dense threads grouped per week and plotted according to how similar their vocabulary is. First, all the words per week are weighted with tf-idf, a common information retrieval algorithm that scores units on the basis if they appear a lot in one of the datasets but not in others (Spärck-Jones). The document sets are then plotted according to the similarity of their weighted vocabulary (cosine similarity). The five highest-scoring terms for the five clusters (identified with K-means) are listed in the bottom-right corner. For legibility, the scatterplot is compressed by the MDS algorithm. To get a better sense of specific vocabulary per week, terms that appeared in all weeks are filtered out (like trump or hillary). Read counterclockwise, the nodes roughly increase in time, thus showing a clear temporal change of discourse, with the first clusters being more similar in vocabulary than the last, and the weeks before and after the primary election (orange cluster) showing a clear gap. Figure 3: A scatterplot showing cosine distances between tf-idf weighted vocabularies of trump-dense threads per week. Compressed with MDS and coloured by five K-means clusters on the underlying tf-idf matrix (excluding terms that appeared in all weeks). Legend shows the top five tf-idf terms within these clusters. ★ denotes the median week in the cluster.With this map, we can trace other words appearing around trump as significant actors in the weekly documents. For instance, Trump-supportive words like stump (referring to “Can’t Stump the Trump”) and maga (“Make America Great Again”) are highly ranked in the first two clusters. In later weeks, less clearly pro-Trump terms appear: drumpf reminds of the unattractive root of the Trump family name, while impeached and mueller show the Russia probe in 2017 and 2018 were significant in the trump-dense threads of that time. This change might thus hint at growing scepticism towards Trump after his win, but it is not shown how these terms are used. Fortunately, the scatterplot offers a rudder with which to navigate to further perspectives.In keeping with Latour’s advice to keep “aggregate structures” and “local contexts” flat (165-72), I contrast the above scatterplot with a perspective on the data that keeps sentence structures intact instead of showing abstracted keyword sets. Figure 4 uses all posts mentioning trump in the median weeks of the first and last clusters in the scatterplot (indicated with ★) and visualises word trees (Wattenberg and Viégas) of most frequent words following “trump is a”. As such, they render explicit ontological associations about Trump; what is Trump, according to /pol/-anons? The first word tree shows posts from 2-8 November 2015, when fifteen Republican competitors were still in the race. As we have seen in Figure 1, Trump was in this month still “only” mentioned in around 50,000 posts (2% of the total). This word tree suggests his eventual nomination was at this point seen as an unlikely and even undesirable scenario, showing derogatory associations like retard and failure, as well as more conspiratorial words like shill, fraud, hillary plant, and hillary clinton puppet. Notably, the most prominent association, meme, and others like joke and fucking comic relief, imply Trump was not taken too seriously (see also Figure 5). Figure 4: Word trees of words following “trump is a” in the median weeks of the first and last clusters of the scatterplot. Made with Jason Davies’s Word Tree application. Figure 5: Anons who did not take Trump seriously. Screencapture taken from archive.4plebs.org (see post 1 and post 2 in context).The first word tree contrast dramatically with the one from the last median week from 18 to 24 December 2017. Here, most associations are anti-Semitic or otherwise related to Judaism, with trump most prominently related to the hate speech term kike. This prompts several questions: did /pol/ become increasingly anti-Semitic? Did already active users radicalise, or were more anti-Semites drawn to /pol/? Or was this nefarious current always there, with Trump merely drawing anti-Semitic attention after he won the election? Although the navigation did not depart from a particular critical framework, by “just following the actors” (Venturini), it already stumbled upon important questions related to popular narratives on 4chan and the alt-right. While it is tempting to stop here and explain the change as “radicalisation”, the navigation should continue to add more empirical perspectives. When doing so, the more plausible explanation is that the unlikely success of Trump briefly attracted (relatively) more diverse and playful visitors to /pol/, obscuring the presence and steady growth of overt extremists in the process.To unpack this, I first focus on the claim that a (relatively) diverse set of users flocked to /pol/ because of the Trump campaign. /pol/’s overall posting activity rose sharply during the 2016 election, which can point to already active users becoming more active, but is likely mostly caused by new users flocking to /pol/. Indeed, this can be traced in actor language. For instance, many anons professed to be “reporting in” from other 4chan boards during crucial moments in the campaing. One of the longest threads in the trump-dense threads dataset (4,504 posts) simply announces “Cruz drops out”. In the comments below, multiple anons state they arrived from other boards to join the Trump-infused activity. For instance, Figure 6 shows an anon replying “/v/ REPORTING IN”, to which sixty other users reacted by similarly affirming themselves as representatives from other boards (e.g. “/mu/ here. Ready to MAGA”). While but another particular view, this implies Trump’s surprising nomination stimulated a crowd-like gathering of different anons jumping into the vortex of trump-related activity on /pol/. Figure 6: Replies by outside-anons “reporting in” the sticky thread announcing Ted Cruz's drop out, 4 May 2016. Screenshots taken from 4plebs.org (see post 1 and post 2 in context).Other actor-language further expresses Trump’s campaign “drew in” new and unadjusted (or: less extreme) users. Notably, many anons claimed the 2016 election led to an “invasion of Reddit users”. Figure 7 shows one such expression: an annotated timeline of /pol/’s posting activity graph (made by 4plebs), posted to /pol/ on 26 February 2016 and subsequently reposted 34 times. It interprets 2016 as a period where “Trump shit goes into overdrive, meme shit floods /pol/, /pol/ is now reddit”. Whether these claims hold any truth is difficult to establish, but the image forms an interesting case of how the entirety “/pol/” is imagined and locally articulated. Such simplistic narratives relate to what Latour calls “panoramas”: totalising notions of some imagined “whole” (188-90) that, while not to be “confused with the collective”, form crucial data since they express how actors understand their own composition (190). Especially in the volatile conditions of anonymous and ephemeral imageboards, repeated panoramic narratives can help in constructing a sense of cohesion–and thereby also form interesting actors to trace. Indeed, following the panoramic statement “/pol/ is now reddit”, other gatekeeping-efforts are not hard to find. For instance, phrases urging other anons to go “back to reddit” (occurring in 19,069 posts in the total dataset) or “back to The_Donald” (a popular pro-Trump subreddit, 1,940 posts) are also particularly popular in the dataset. Figure 7: An image circulated on /pol/ lamenting that "/pol/ is now reddit" by annotating 4plebs’s posting metrics. Screenshot taken from archive.4plebs.org (see posts).Did trump-related activity on /pol/ indeed become more “meme-y” or “Reddit-like” during the election cycle, as the above panorama articulates? The activity in the trump-dense threads seems to suggest so. Figure 8 again uses the tf-idf terms from these threads, but here with the columns denoting the weeks and the rows the top scoring tf-idf terms of their respective week. To highlight relevant actors, all terms are greyed out (see the unedited sheet here), except for several keywords that indicate particularly playful or memetic vernacular: the aforementioned stump, emperor, referring to Trump’s nickname as “God Emperor”; energy, referring to “high energy”, a common catchphrase amongst Trump supporters; magic, referring to “meme magic”, the faux-ironic belief that posting memes affects real-life events; and pepe, the infamous cartoon frog. In both the tf-idf ranking and the absolute frequencies, these keywords flourish in 2016, but disappear soon after the presidential election passes. The later weeks in 2017 and 2018 rarely contain similarly playful and memetic terms, and if they do, suggest mocking discourse regarding Trump (e.g. drumpf). This perspective thus pictures the environment around trump in the run-up to the election as a particularly memetic yet short-lived carnival. At least from this perspective, “meme shit” thus indeed seemed to have “flooded /pol/”, but only for a short while. Figure 8: tf-idf matrix of trump-dense threads, columns denoting weeks and rows denoting the top hundred most relevant terms per week. Download the full tf-idf matrix with all terms here.Despite this carnivalesque activity, further perspectives suggest it did not go at the expense of extremist activity on /pol/. Figure 9 shows the absolute and relative counts of the word "jew" and its derogatory synonym "kike". Each of these increases from 2015 onwards. As such, it seems to align with claims that Trump’s success and /pol/ becoming increasingly extremist were causally related (Thompson). However, apart from possibly confusing correlation with causation, the relative presence remains fairly stable, even slightly decreasing during the frenzy of the Trump campaign. Since we also saw Trump himself become a target for anti-Semitic activity, these trendlines rather imply /pol/’s extremist current grew proportionally to the overall increase in activity, and increased alongside but not but necessarily as a partisan contingent as a result of Trump’s campaign. Figure 9: The absolute and relative frequency of the terms "jew" and "kike" on 4chan/pol/.ConclusionCombined, the above navigation implies two main changes in 4chan/pol/’s trump-related current. First, the climaxes of the 2016 Republican primaries and presidential elections seem to have invoked crowd-like influxes of (relatively) heterogeneous users joining the Trump-delirium, marked by particularly memetic activity. Second, /pol/ additionally seemed to have formed a welcoming hotbed for anti-Semites and other extremists, as the absolute amount of (anti-Semitic) hate speech increased. However, while already-present and new users might have been energised by Trump, they were not necessarily loyal to him, as professed by the fact that Trump himself eventually became a target. Together with the fact that anti-Semitic hate speech stayed relatively consistent, instead of being “countercultural” (Nagle) or exclusively pro-Trump, /pol/ thus seems to have been composed of quite a stable anti-Semitic and Trump-critical contingent, increasing proportionally to /pol/’s general growth.Methodologically, this text sought to demonstrate how a brief navigation of trump on 4chan/pol/ can provide provisional yet valuable insights regarding continuously changing current of online anonymous collectives. As the cliché goes, however, this brief exploration has left more many questions, or rather, it did not “deploy the content with all its connections” (Latour 147). For instance, I have not touched on how many of the trump-dense threads are distinctly separated and pro-Trump “general threads” (Jokubauskaitė and Peeters). Considering the vastness of such tasks, the necessity remains to find appropriate ways to “accurately map” the wild currents of the dissimulative Web–despite how muddy they might get.NoteThis text is a compressed and edited version of a longer MA thesis available here.ReferencesAbramson, Seth. “Listen Up, Progressives: Here’s How to Deal with a 4Chan (“Alt-Right”) Troll.” Medium, 2 May 2017. <https://medium.com/@Seth_Abramson/listen-up-progressives-heres-how-to-deal-with-a-4chan-alt-right-troll-48594f59a303>.Auerbach, David. “Anonymity as Culture: Treatise.” Triple Canopy, n.d. 22 June 2020 <https://www.canopycanopycanopy.com/contents/anonymity_as_culture__treatise>.Beran, Dale. “4chan: The Skeleton Key to the Rise of Trump”. Medium, 14 Feb. 2017. <https://medium.com/@DaleBeran/4chan-the-skeleton-key-to-the-rise-of-trump-624e7cb798cb>.Beran, Dale. It Came from Something Awful: How a Toxic Troll Army Accidentally Memed Donald Trump into Office. New York: All Points Books, 2019.Bernstein, Michael S, Andrés Monroy-Hernández, Drew Harry, Paul André, Katrina Panovich, and Greg Vargas. “4chan and /b/: An Analysis of Anonymity and Ephemerality in a Large Online Community.” Proceedings of the Fifth International AAAI Conference on Weblogs and Social Media, 2011.Coleman, Gabriella. Hacker, Hoaxer, Whistleblower, Spy: The Many Faces of Anonymous. London: Verso Books, 2014.De Laet, Marianne, and Annemarie Mol. “The Zimbabwe Bush Pump: Mechanics of a Fluid Technology.” Social Studies of Science 30.2 (2000): 225–263. 1 May 2020 <https://journals.sagepub.com/doi/10.1177/030631200030002002>. De Zeeuw, Daniel, and Marc Tuters. “Teh Internet Is Serious Business: On the Deep Vernacular Web Imaginary.” Cultural Politics 16.2 (2020).Dewey, Caitlin. “The Only True Winners of this Election are Trolls.” The Washington Post, 3 Nov. 2016. <https://www.washingtonpost.com/news/the-intersect/wp/2016/11/03/the-only-true-winners-of-this-election-are-trolls/>.Faris, Robert, Hal Roberts, Bruce Etling, Nikki Bourassa, Ethan Zuckerman, and Yochai Benkler. “Partisanship, Propaganda, and Disinformation: Online Media and the 2016 U.S. Presidential Election.” Berkman Klein Center Research Publication, 2017. <http://nrs.harvard.edu/urn-3:HUL.InstRepos:33759251>.Garfinkel, Harold. Studies in Ethnomethodology. New Jersey: Prentice-Hall, 1967.Hagen, Sal. “Rendering Legible the Ephemerality of 4chan/pol/.” OILab.eu, 12 Apr. 2020. <https://oilab.eu/rendering-legible-the-ephemerality-of-4chanpol/>.Hawley, George. Making Sense of the Alt-Right. New York: Columbia UP, 2017.Jokubauskaitė, Emilija, and Stijn Peeters. “Generally Curious: Thematically Distinct Datasets of General Threads on 4chan/Pol/”. Proceedings of the International AAAI Conference on Web and Social Media 14.1 (2020): 863-7. <https://www.aaai.org/ojs/index.php/ICWSM/article/view/7351>.Latour, Bruno. Reassembling the Social: An Introduction to Actor-Network Theory. New York: Oxford UP, 2005.Latour, Bruno, Pablo Jensen, Tommaso Venturini, Sébastian Grauwin, and Dominique Boullier. “‘The Whole Is Always Smaller than Its Parts’. A Digital Test of Gabriel Tarde’s Monads.” British Journal of Sociology 63.4 (2012): 590-615.Marantz, Andrew. Antisocial: Online Extremists, Techno-Utopians, and the Hijacking of the American Conversation. New York: Penguin Random House, 2019.Nagle, Angela. Kill All Normies: Online Culture Wars from 4chan and Tumblr to Trump and the White House. Winchester: Zero Books, 2017.Phillips, Whitney. This Is Why We Can’t Have Nice Things: Mapping the Relationship between Online Trolling and Mainstream Culture. Cambridge: MIT Press, 2015.———. “The Alt-Right Was Conjured Out of Pearl Clutching and Media Attention.” Motherboard, 12 Oct. 2016 <https://www.vice.com/en_us/article/jpgaeb/conjuring-the-alt-right>.———. “The Oxygen of Amplification: Better Practices for Reporting on Extremists, Antagonists, and Manipulators Online.” Data & Society, 2018. <https://datasociety.net/wp-content/uploads/2018/05/1_PART_1_Oxygen_of_Amplification_DS.pdf>.———. “It Wasn’t Just the Trolls: Early Internet Culture, ‘Fun,’ and the Fires of Exclusionary Laughter.” Social Media + Society (2019). <https://journals.sagepub.com/doi/10.1177/2056305119849493>.Phillips, Whitney, Gabriella Coleman, and Jessica Beyer. “Trolling Scholars Debunk the Idea That the Alt-Right’s Shitposters Have Magic Powers.” Motherboard, 22 Mar. 2017. <https://motherboard.vice.com/en_us/article/z4k549/trolling-scholars-debunk-the-idea-that-the-alt-rights-trolls-have-magic-powers>.Robertson, Adi. “Hillary Clinton Exposing Pepe the Frog Is the Death of Explainers.” The Verge, 15 Sep. 2016. <https://www.theverge.com/2016/9/15/12926976/hillary-clinton-trump-pepe-the-frog-alt-right-explainer>.Spärck Jones, Karen. “A Statistical Interpretation of Term Specificity and its Application in Retrieval.” Journal of Documentation 28.1 (1972): 11-21.Stuart, Tessa. “Inside the DeploraBall: The Trump-Loving Trolls Plotting a GOP Takeover.” Rolling Stone, 20 Jan. 2017. <https://www.rollingstone.com/politics/politics-features/inside-the-deploraball-the-trump-loving-trolls-plotting-a-gop-takeover-128128/>.Tarde, Gabriel. The Laws of Imitation. Ed. and trans. Elsie Clews Parsons. New York: Henry Holt and Company, 1903.Thompson, Andrew. “The Measure of Hate on 4chan.” Rolling Stone, 10 May 2018. <https://www.rollingstone.com/politics/politics-news/the-measure-of-hate-on-4chan-627922/>.Venturini, Tommaso. “Diving in Magma: How to Explore Controversies with Actor-Network Theory.” Public Understanding of Science 19.3 (2010): 258-273.Wattenberg, Martin, and Fernanda Viégas. “The Word Tree, an Interactive Visual Concordance.” IEEE Transactions on Visualization and Computer Graphics 14.6 (2008): 1221-1228.

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Chavdarov, Anatoliy V. "Special Issue No. – 10, June, 2020 Journal > Special Issue > Special Issue No. – 10, June, 2020 > Page 5 “Quantative Methods in Modern Science” organized by Academic Paper Ltd, Russia MORPHOLOGICAL AND ANATOMICAL FEATURES OF THE GENUS GAGEA SALISB., GROWING IN THE EAST KAZAKHSTAN REGION Authors: Zhamal T. Igissinova,Almash A. Kitapbayeva,Anargul S. Sharipkhanova,Alexander L. Vorobyev,Svetlana F. Kolosova,Zhanat K. Idrisheva, DOI: https://doi.org/10.26782/jmcms.spl.10/2020.06.00041 Abstract: Due to ecological preferences among species of the genus GageaSalisb, many plants are qualified as rare and/or endangered. Therefore, the problem of rational use of natural resources, in particular protection of early spring plant species is very important. However, literary sources analysis only reveals data on the biology of species of this genus. The present research,conducted in the spring of 2017-2019, focuses on anatomical and morphological features of two Altai species: Gagealutea and Gagea minima; these features were studied, clarified and confirmed by drawings and photographs. The anatomical structure of the stem and leaf blade was studied in detail. The obtained research results will prove useful for studies of medicinal raw materials and honey plants. The aforementioned species are similar in morphological features, yet G. minima issmaller in size, and its shoots appear earlier than those of other species Keywords: Flora,gageas,Altai species,vegetative organs., Refference: I. Atlas of areas and resources of medicinal plants of Kazakhstan.Almaty, 2008. II. Baitenov M.S. Flora of Kazakhstan.Almaty: Ġylym, 2001. III. DanilevichV. G. ThegenusGageaSalisb. of WesternTienShan. PhD Thesis, St. Petersburg,1996. IV. EgeubaevaR.A., GemedzhievaN.G. The current state of stocks of medicinal plants in some mountain ecosystems of Kazakhstan.Proceedings of the international scientific conference ‘”Results and prospects for the development of botanical science in Kazakhstan’, 2002. V. Kotukhov Yu.A. New species of the genus Gagea (Liliaceae) from Southern Altai. Bot. Journal.1989;74(11). VI. KotukhovYu.A. ListofvascularplantsofKazakhstanAltai. Botan. Researches ofSiberiaandKazakhstan.2005;11. VII. KotukhovYu. The current state of populations of rare and endangered plants in Eastern Kazakhstan. Almaty: AST, 2009. VIII. Kotukhov Yu.A., DanilovaA.N., AnufrievaO.A. Synopsisoftheonions (AlliumL.) oftheKazakhstanAltai, Sauro-ManrakandtheZaisandepression. BotanicalstudiesofSiberiaandKazakhstan. 2011;17: 3-33. IX. Kotukhov, Yu.A., Baytulin, I.O. Rareandendangered, endemicandrelictelementsofthefloraofKazakhstanAltai. MaterialsoftheIntern. scientific-practical. conf. ‘Sustainablemanagementofprotectedareas’.Almaty: Ridder, 2010. X. Krasnoborov I.M. et al. The determinant of plants of the Republic of Altai. Novosibirsk: SB RAS, 2012. XI. Levichev I.G. On the species status of Gagea Rubicunda. Botanical Journal.1997;6:71-76. XII. Levichev I.G. A new species of the genus Gagea (Liliaceae). Botanical Journal. 2000;7: 186-189. XIII. Levichev I.G., Jangb Chang-gee, Seung Hwan Ohc, Lazkovd G.A.A new species of genus GageaSalisb.(Liliaceae) from Kyrgyz Republic (Western Tian Shan, Chatkal Range, Sary-Chelek Nature Reserve). Journal of Asia-Pacific Biodiversity.2019; 12: 341-343. XIV. Peterson A., Levichev I.G., Peterson J. Systematics of Gagea and Lloydia (Liliaceae) and infrageneric classification of Gagea based on molecular and morphological data. Molecular Phylogenetics and Evolution.2008; 46. XV. Peruzzi L., Peterson A., Tison J.-M., Peterson J. Phylogenetic relationships of GageaSalisb.(Liliaceae) in Italy, inferred from molecular and morphological data matrices. Plant Systematics and Evolution; 2008: 276. XVI. Rib R.D. Honey plants of Kazakhstan. Advertising Digest, 2013. XVII. Scherbakova L.I., Shirshikova N.A. Flora of medicinal plants in the vicinity of Ust-Kamenogorsk. Collection of materials of the scientific-practical conference ‘Unity of Education, Science and Innovation’. Ust-Kamenogorsk: EKSU, 2011. XVIII. syganovA.P. PrimrosesofEastKazakhstan. Ust-Kamenogorsk: EKSU, 2001. XIX. Tsyganov A.P. Flora and vegetation of the South Altai Tarbagatay. Berlin: LAP LAMBERT,2014. XX. Utyasheva, T.R., Berezovikov, N.N., Zinchenko, Yu.K. ProceedingsoftheMarkakolskStateNatureReserve. Ust-Kamenogorsk, 2009. XXI. Xinqi C, Turland NJ. Gagea. Flora of China.2000;24: 117-121. XXII. Zarrei M., Zarre S., Wilkin P., Rix E.M. Systematic revision of the genus GageaSalisb. (Liliaceae) in Iran.BotJourn Linn Soc.2007;154. XXIII. Zarrei M., Wilkin P., Ingroille M.J., Chase M.W. A revised infrageneric classification for GageaSalisb. (Tulipeae; Liliaceae): insights from DNA sequence and morphological data.Phytotaxa.2011:5. View | Download INFLUENCE OF SUCCESSION CROPPING ON ECONOMIC EFFICIENCY OF NO-TILL CROP ROTATIONS Authors: Victor K. Dridiger,Roman S. Stukalov,Rasul G. Gadzhiumarov,Anastasiya A. Voropaeva,Viktoriay A. Kolomytseva, DOI: https://doi.org/10.26782/jmcms.spl.10/2020.06.00042 Abstract: This study was aimed at examining the influence of succession cropping on the economic efficiency of no-till field crop rotations on the black earth in the zone of unstable moistening of the Stavropol krai. A long-term stationary experiment was conducted to examine for the purpose nine field crop rotation patterns different in the number of fields (four to six), set of crops, and their succession in crop rotation. The respective shares of legumes, oilseeds, and cereals in the cropping pattern were 17 to 33, 17 to 40, and 50 to 67 %. It has been established that in case of no-till field crop cultivation the economic efficiency of plant production depends on the set of crops and their succession in rotation. The most economically efficient type of crop rotation is the soya-winter wheat-peas-winter wheat-sunflower-corn six-field rotation with two fields of legumes: in this rotation 1 ha of crop rotation area yields 3 850 grain units per ha at a grain unit prime cost of 5.46 roubles; the plant production output return and profitability were 20,888 roubles per ha and 113 %, respectively. The high production profitabilities provided by the soya-winter wheat-sunflower four-field and the soya-winter-wheat-sunflower-corn-winter wheat five-field crop rotation are 108.7 and 106.2 %, respectively. The inclusion of winter wheat in crop rotation for two years in a row reduces the second winter wheat crop yield by 80 to 100 %, which means a certain reduction in the grain unit harvesting rate to 3.48-3.57 thousands per ha of rotation area and cuts the production profitability down to 84.4-92.3 %. This is why, no-till cropping should not include winter wheat for a second time Keywords: No-till technology,crop rotation,predecessor,yield,return,profitability, Refference: I Badakhova G. Kh. and Knutas A. V., Stavropol Krai: Modern Climate Conditions [Stavropol’skiykray: sovremennyyeklimaticheskiyeusloviya]. Stavropol: SUE Krai Communication Networks, 2007. II Cherkasov G. N. and Akimenko A. S. Scientific Basis of Modernization of Crop Rotations and Formation of Their Systems according to the Specializations of Farms in the Central Chernozem Region [Osnovy moderniz atsiisevooborotoviformirovaniyaikh sistem v sootvetstvii so spetsi-alizatsiyeykhozyaystvTsentral’nogoChernozem’ya]. Zemledelie. 2017; 4: 3-5. III Decree 330 of July 6, 2017 the Ministry of Agriculture of Russia “On Approving Coefficients of Converting to Agricultural Crops to Grain Units [Ob utverzhdeniikoeffitsiyentovperevoda v zernovyyee dinitsysel’s kokhozyaystvennykhkul’tur]. IV Dridiger V. K., About Methods of Research of No-Till Technology [O metodikeissledovaniytekhnologii No-till]//Achievements of Science and Technology of AIC (Dostizheniyanaukiitekhniki APK). 2016; 30 (4): 30-32. V Dridiger V. K. and Gadzhiumarov R. G. Growth, Development, and Productivity of Soya Beans Cultivated On No-Till Technology in the Zone of Unstable Moistening of Stavropol Region [Rost, razvitiyeiproduktivnost’ soiprivozdelyvaniipotekhnologii No-till v zone ne-ustoychivog ouvlazhneniyaStavropol’skogokraya]//Oil Crops RTBVNIIMK (Maslichnyyekul’turyNTBVNIIMK). 2018; 3 (175): 52–57. VI Dridiger V. K., Godunova E. I., Eroshenko F. V., Stukalov R. S., Gadzhiumarov, R. G., Effekt of No-till Technology on erosion resistance, the population of earthworms and humus content in soil (Vliyaniyetekhnologii No-till naprotivoerozionnuyuustoychivost’, populyatsiyudozhdevykhcherveyisoderzhaniyegumusa v pochve)//Research Journal of Pharmaceutical, Biological and Chemical Sciences. 2018; 9 (2): 766-770. VII Karabutov A. P., Solovichenko V. D., Nikitin V. V. et al., Reproduction of Soil Fertility, Productivity and Energy Efficiency of Crop Rotations [Vosproizvodstvoplodorodiyapochv, produktivnost’ ienergeticheskayaeffektivnost’ sevooborotov]. Zemledelie. 2019; 2: 3-7. VIII Kulintsev V. V., Dridiger V. K., Godunova E. I., Kovtun V. I., Zhukova M. P., Effekt of No-till Technology on The Available Moisture Content and Soil Density in The Crop Rotation [Vliyaniyetekhnologii No-till nasoderzhaniyedostupnoyvlagiiplotnost’ pochvy v sevoob-orote]// Research Journal of Pharmaceutical, Biological and Chemical Sciences. 2017; 8 (6): 795-99. IX Kulintsev V. V., Godunova E. I., Zhelnakova L. I. et al., Next-Gen Agriculture System for Stavropol Krai: Monograph [SistemazemledeliyanovogopokoleniyaStavropol’skogokraya: Monogtafiya]. Stavropol: AGRUS Publishers, Stavropol State Agrarian University, 2013. X Lessiter Frank, 29 reasons why many growers are harvesting higher no-till yields in their fields than some university scientists find in research plots//No-till Farmer. 2015; 44 (2): 8. XI Rodionova O. A. Reproduction and Exchange-Distributive Relations in Farming Entities [Vosproizvodstvoiobmenno-raspredelitel’nyyeotnosheniya v sel’skokhozyaystvennykhorganizatsiyakh]//Economy, Labour, and Control in Agriculture (Ekonomika, trud, upravleniye v sel’skomkhozyaystve). 2010; 1 (2): 24-27. XII Sandu I. S., Svobodin V. A., Nechaev V. I., Kosolapova M. V., and Fedorenko V. F., Agricultural Production Efficiency: Recommended Practices [Effektivnost’ sel’skokhozyaystvennogoproizvodstva (metodicheskiyerekomendatsii)]. Moscow: Rosinforagrotech, 2013. XIII Sotchenko V. S. Modern Corn Cultivation Technologies [Sovremennayatekhnologiyavozdelyvaniya]. Moscow: Rosagrokhim, 2009. View | Download DEVELOPMENT AND TESTING OF AUTONOMOUS PORTABLE SEISMOMETER DESIGNED FOR USE AT ULTRALOW TEMPERATURES IN ARCTIC ENVIRONMENT Authors: Mikhail A. Abaturov,Yuriy V. Sirotinskiy, DOI: https://doi.org/10.26782/jmcms.spl.10/2020.06.00043 Abstract: This paper is concerned with solving one of the issues of the general problem of designing geophysical equipment for the natural climatic environment of the Arctic. The relevance of the topic has to do with an increased global interest in this region. The paper is aimed at considering the basic principles of developing and the procedure of testing seismic instruments for use at ultralow climatic temperatures. In this paper the indicated issue is considered through the example of a seismic module designed for petroleum and gas exploration by passive seismoacoustic methods. The seismic module is a direct-burial portable unit of around 5 kg in weight, designed to continuously measure and record microseismic triaxial orthogonal (ZNE) noise in a range from 0.1 to 45 Hz during several days in autonomous mode. The functional chart of designing the seismic module was considered, and concrete conclusions were made for choosing the necessary components to meet the ultralow-temperature operational requirements. The conclusions made served for developing appropriate seismic module. In this case, the components and tools used included a SAFT MP 176065 xc low-temperature lithium cell, industrial-spec electronic component parts, a Zhaofeng Geophysical ZF-4.5 Chinese primary electrodynamic seismic sensor, housing seal parts made of frost-resistant silicone materials, and finely dispersed silica gel used as water-retaining sorbent to avoid condensation in the housing. The paper also describes a procedure of low-temperature collation tests at the lab using a New Brunswick Scientific freezing plant. The test results proved the operability of the developed equipment at ultralow temperatures down to -55°C. In addition, tests were conducted at low microseismic noises in the actual Arctic environment. The possibility to detect signals in a range from 1 to 10 Hz at the level close to the NLNM limit (the Peterson model) has been confirmed, which allows monitoring and exploring petroleum and gas deposits by passive methods. As revealed by this study, the suggested approaches are efficient in developing high-precision mobile seismic instruments for use at ultralow climatic temperatures. The solution of the considered instrumentation and methodical issues is of great practical significance as a constituent of the generic problem of Arctic exploration. Keywords: Seismic instrumentation,microseismic monitoring,Peterson model,geological exploration,temperature ratings,cooling test, Refference: I. AD797: Ultralow Distortion, Ultralow Noise Op Amp, Analog Devices, Inc., Data Sheet (Rev. K). Analog Devices, Inc. URL: https://www.analog.com/media/en/technical-documentation/data-sheets/AD797.pdf(Date of access September 2, 2019). II. Agafonov, V. M., Egorov, I. V., and Shabalina, A. S. Operating Principles and Technical Characteristics of a Small-Sized Molecular–Electronic Seismic Sensor with Negative Feedback [Printsipyraboty I tekhnicheskiyekharakteristikimalogabaritnogomolekulyarno-elektronnogoseysmodatchika s otritsatel’noyobratnoysvyaz’yu]. SeysmicheskiyePribory (Seismic Instruments). 2014; 50 (1): 1–8. DOI: 10.3103/S0747923914010022. III. Antonovskaya, G., Konechnaya, Ya.,Kremenetskaya, E., Asming, V., Kvaema, T., Schweitzer, J., Ringdal, F. Enhanced Earthquake Monitoring in the European Arctic. Polar Science. 2015; 1 (9): 158-167. IV. Anthony, R. E., Aster, R. C., Wiens, D., Nyblade, Andr., Anandakrishnan, Sr., Huerta, Audr., Winberry, J. P., Wilson, T., and Rowe, Ch. The Seismic Noise Environment of Antarctica. Seismological Research Letters. 2015; 86(1): 89-100. DOI: 10.1785/0220150005 V. Brincker, R., Lago, T. L., Andersen, P., and Ventura, C. Improving the Classical Geophone Sensor Element by Digital Correction. In Conference Proceedings: IMAC-XXIII: A Conference & Exposition on Structural Dynamics Society for Experimental Mechanics, 2005. URL: https://www.researchgate.net/publication/242452637_Improving_the_Classical_Geophone_Sensor_Element_by_Digital_Correction(Date of access September 2, 2019). VI. Bylaw 164 of the State Committee for Construction of the Russian Federation “On adopting amendments to SNiP 31-01-99 “Construction climatology”. URL: https://base.garant.ru/2322381/(Date of access September 2, 2019). VII. Chao Xu, Junbo Wang, Deyong Chen, Jian Chen, Bowen Liu, Wenjie Qi, XichenZheng, Hua Wei, Guoqing Zhang. The Electrochemical Seismometer Based on a Novel Designed.Sensing Electrode for Undersea Exploration. 20th International Conference on Solid-State Sensors, Actuators and Microsystems &Eurosensors XXXIII (TRANSDUCERS &EUROSENSORS XXXIII). IEEE, 2019. DOI: 10.1109/TRANSDUCERS.2019.8808450. VIII. Chebotareva, I. Ya. New algorithms of emission tomography for passive seismic monitoring of a producing hydrocarbon deposit: Part I. Algorithms of processing and numerical simulation [Novyye algoritmyemissionnoyto mografiidlyapassivnogoseysmicheskogomonitoringarazrabatyvayemykhmestorozhdeniyuglevodorodov. Chast’ I: Algoritmyobrabotki I chislennoyemodelirovaniye]. FizikaZemli. 2010; 46(3):187-98. DOI: 10.1134/S106935131003002X IX. Danilov, A. V. and Konechnaya, Ya. V. Analytical comparison of seismic instruments for stationary surveys in the Arctic [Sravnitel’nyyanalizseysmicheskoyapparaturydlyastatsionarnykhnablyudeniy v Arktike]. DSYS. URL: https://dsys.ru/upload/id254_docPDF_FranzJosefLand.pdf(Date of access September 2, 2019). X. Dew point temperature calculator. Maple Tech. International LLC. URL: https://www.calculator.net/dew-point-calculator.html?airtemperature=20&airtemperatureunit=celsius&humidity=0.34&dewpoint=&dewpointunit=celsius&x=51&y=14(Date of access September 2, 2019). XI. Frolov, A. S. Matching of wave fields recorded by different geophysical receivers [Soglasovaniyevolnovykhpoley, poluchennykh s primeneniyemrazlichnoyregistriruyushcheyapparatury]. Abstracts IX International scientific and technical conference competition of young specialists “Geophysics-2013”. Saint-Petersburg: Gubkin University, 2013. URL: https://www.gubkin.ru/faculty/geology_and_geophysics/chairs_and_departments/exploration_geophysics_and_computers_systems/files/2013_SPb_Frolov.pdf. (Date of access September 2, 2019). XII. Gibbons, S. J., Asming, V., Fedorov, A., Fyen, J., Kero, J., Kozlovskaya, E., Kværna, T., Liszka, L., Näsholm, S.P., Raita, T., Roth, M., Tiira, T., Vinogradov, Yu. The European Arctic: A laboratory for seismoacoustic studies. Seism. Res. Letters. 2015; 86 (3): 917–928. XIII. GOST 8.395-80. State system for ensuring the uniformity of measurements. Reference conditions of measurements while calibrating. General requirements [Gosudarstvennayasistemaobespecheniyaedinstvaizmereniy. Normal’nyyeusloviyaizmereniypripoverke. Obshchiyetrebovaniya]. Moscow: Standartinform, 2008. URL: http://gostrf.com/normadata/1/4294821/4294821960.pdf (Date of access September 2, 2019). XIV. Guralp 6TD. Operators’ Guide. Document Number: MAN-T60-0002, Issue J: April, 2017. Guralp Systems Limited. URL: https://www.guralp.com/documents/MAN-T60-0002.pdf (Date of access September 2, 2019). XV. Inshakova, A. S., Barykina, E. S., and Kozlov, V. V. Role of silica gel in adsorption air drying [Rol’ silikagelya v adsorbtsionnoyosushkevozdukha]. AlleyaNauki (Alley of Science). 2017; 15. URL: https://www.alley- science.ru/domains_data/files/November2017/ROL%20SILIKAGELYa%20V%20ADSORBCIONNOY%20OSUShKE%20VOZDUHA.pdf(Date of access September 2, 2019). XVI. Ioffe, D. and Pozdnyakov, P. Searching for Hidden Reserves of Modern Microchip Circuits. Part I [Poiskskrytykhrezervovsovremennykhmikroskhem. Chast’ I].Komponenty I tekhnologii (Components and Technologies). 2015; 4: 144-46. XVII. Jiang Xu, Xi Wang, Ningyi Yuan, Jianning Ding, Si Qin, Joselito M. Razal, Xuehang Wang, ShanhaiGe, Gogotsi, Yu. Extending the low temperature operational limit of Li-ion battery to −80 °C. Energy Storage Materials (IF0). Published 2019-04-27. DOI: 10.1016/j.ensm.2019.04.033. XVIII. Kouznetsov, O. L., Lyasch, Y. F., Chirkin, I. A., Rizanov, E. G., LeRoy, S. D., Koligaev, S. O. Long-term monitoring of microseismic emissions: Earth tides, fracture distribution, and fluid content. SEG, APPG Interpretation. 2016: 4 (2): T191–T204. XIX. Laverov, N. P., Bogoyavlenskiy, V. I., Bogoyavlenskiy, I. V. Fundamental Aspects of Rational Management of the Petroleum and Gas Resources of the Arctic and the Russian Continental Shelf: Strategy, Prospects, and Problems [Fundamental’nyyeaspektyratsional’nogoosvoyeniyaresursovneftiigazaArktiki I shel’faRossii: strategiya, perspektivyi problem].Arktika: ekologiya I ekonomika [Arctic: Ecology and Economy]. 2016; 2 (22): 4-13. XX. Lee, P. Low Noise Amplifier Selection Guide for Optimal Noise Performance, Analog Devices, Inc., AN-940 Application Note. Analog Devices, Inc. URL: https://www.analog.com/media/en/technical-documentation/application-notes/AN-940.pdf(Date of access September 2, 2019). XXI. Markatis, N., Polychronopoulou, K., Tselentis, Ak. Passive seismic tomography: A passive concept actively evolving. First Break. 2012; 30 (7): 83-90. XXII. Matveev, I. V. and Matveeva, N. V. Portable seismic recorder “SEISAR-5” with very low energy consumption for autonomous work in harsh climatic conditions [Portativnyyseysmicheskiyregistrator «Seysar-5» s ochen’ nizkimenergopotrebleniyemdlyaavtonomnoyraboty v slozhnykhklimatic heskikhusloviyakh]. Nauka I tekhnologicheskierazrabotki (Science and Technological Developments). 2017; 96 (3): 33-40. [Special Issue “Applied Geophysics: New Developments and Results. Part 1. Seismology and Seismic Exploration]. DOI: 10.21455/std2017.3-3. XXIII. Mishra, R. The Temperature Ratings of Electronic Parts.Electronics Cooling magazine. URL: http://www.electronics-cooling.com/2004/02/the-temperature-ratings-of-electronic-parts(Date of access September 2, 2019). XXIV. Moore, Sue E.; Stabeno, Phyllis J.; Van Pelt, Thomas I. The Synthesis of Arctic Research (SOAR) project. 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View | Download COMPARATIVE ANALYSIS OF RESULTS OF TREATMENT OF PATIENTS WITH FOOT PATHOLOGY WHO UNDERWENT WEIL OPEN OSTEOTOMY BY CLASSICAL METHOD AND WITHOUT STEOSYNTHESIS Authors: Yuriy V. Lartsev,Dmitrii A. Rasputin,Sergey D. Zuev-Ratnikov,Pavel V.Ryzhov,Dmitry S. Kudashev,Anton A. Bogdanov, DOI: https://doi.org/10.26782/jmcms.spl.10/2020.06.00044 Abstract: The article considers the problem of surgical correction of the second metatarsal bone length. The article analyzes the results of treatment of patients with excess length of the second metatarsal bones that underwent osteotomy with and without osteosynthesis. The results of treatment of patients who underwent metatarsal shortening due to classical Weil-osteotomy with and without osteosynthesis were analyzed. The first group consisted of 34 patients. They underwent classical Weil osteotomy. The second group included 44 patients in whomosteotomy of the second metatarsal bone were not by the screw. When studying the results of the treatment in the immediate postoperative period, weeks 6, 12, slightly better results were observed in patients of the first group, while one year after surgical treatment the results in both groups were comparable. One year after surgical treatment, there were 2.9% (1 patient) of unsatisfactory results in the first group and 4.5% (2 patients) in the second group. Considering the comparability of the results of treatment in remote postoperative period, the choice of concrete method remains with the operating surgeon. Keywords: Flat feet,hallux valgus,corrective osteotomy,metatarsal bones, Refference: I. A novel modification of the Stainsby procedure: surgical technique and clinical outcome [Text] / E. Concannon, R. MacNiocaill, R. Flavin [et al.] // Foot Ankle Surg. – 2014. – Dec., Vol. 20(4). – P. 262–267. II. Accurate determination of relative metatarsal protrusion with a small intermetatarsal angle: a novel simplified method [Text] / L. Osher, M.M. Blazer, S. Buck [et al.] // J. Foot Ankle Surg. – 2014. – Sep.-Oct., Vol. 53(5). – P. 548–556. III. Argerakis, N.G. The radiographic effects of the scarf bunionectomy on rearfoot alignment [Text] / N.G. Argerakis, L.Jr. Weil, L.S. Sr. Weil // Foot Ankle Spec. – 2015. – Apr., Vol. 8(2). – P. 89–94. IV. Bauer, T. Percutaneous forefoot surgery [Text] / T. Bauer // Orthop. Traumatol. Surg. Res. – 2014. – Feb., Vol. 100(1 Suppl.). – P. S191–S204. V. Biomechanical Evaluation of Custom Foot Orthoses for Hallux Valgus Deformity [Text] // J. Foot Ankle Surg. – 2015. – Sep.-Oct., Vol.54(5). – P. 852–855. VI. Chopra, S. Characterization of gait in female patients with moderate to severe hallux valgus deformity [Text] / S. Chopra, K. Moerenhout, X. Crevoisier // Clin. Biomech. (Bristol, Avon). – 2015. – Jul., Vol. 30(6). – P. 629–635. VII. Computer assisted planning and custom-made surgical guide for malunited pronation deformity after first metatarsophalangeal joint arthrodesis in rheumatoid arthritis: a case report [Text] / M. Hirao, S. Ikemoto, H. Tsuboi [et al.] // Comput. Aided Surg. – 2014. – Vol. 19(1-3). – P. 13–19. VIII. Correlation between static radiographic measurements and intersegmental angular measurements during gait using a multisegment foot model [Text] / D.Y. Lee, S.G. Seo, E.J. Kim [et al.] // Foot Ankle Int. – 2015. – Jan., Vol.36(1). – P. 1–10. IX. Correlative study between length of first metatarsal and transfer metatarsalgia after osteotomy of first metatarsal [Text]: [Article in Chinese] / F.Q. Zhang, B.Y. Pei, S.T. Wei [et al.] // Zhonghua Yi XueZaZhi. – 2013. – Nov. 19, Vol. 93(43). – P. 3441–3444. X. Dave, M.H. Forefoot Deformity in Rheumatoid Arthritis: A Comparison of Shod and Unshod Populations [Text] / M.H. Dave, L.W. Mason, K. Hariharan // Foot Ankle Spec. – 2015. – Oct., Vol. 8(5). – P. 378–383. XI. Does arthrodesis of the first metatarsophalangeal joint correct the intermetatarsal M1M2 angle? Analysis of a continuous series of 208 arthrodeses fixed with plates [Text] / F. Dalat, F. Cottalorda, M.H. Fessy [et al.] // Orthop. Traumatol. Surg. Res. – 2015. – Oct., Vol. 101(6). – P. 709–714. XII. Dynamic plantar pressure distribution after percutaneous hallux valgus correction using the Reverdin-Isham osteotomy [Text]: [Article in Spanish] / G. Rodríguez-Reyes, E. López-Gavito, A.I. Pérez-Sanpablo [et al.] // Rev. Invest. Clin. – 2014. – Jul., Vol. 66, Suppl. 1. – P. S79-S84. XIII. Efficacy of Bilateral Simultaneous Hallux Valgus Correction Compared to Unilateral [Text] / A.V. Boychenko, L.N. Solomin, S.G. Parfeyev [et al.] // Foot Ankle Int. – 2015. – Nov., Vol. 36(11). – P. 1339–1343. XIV. Endolog technique for correction of hallux valgus: a prospective study of 30 patients with 4-year follow-up [Text] / C. Biz, M. Corradin, I. Petretta [et al.] // J. OrthopSurg Res. – 2015. – Jul. 2, № 10. – P. 102. XV. First metatarsal proximal opening wedge osteotomy for correction of hallux valgus deformity: comparison of straight versus oblique osteotomy [Text] / S.H. Han, E.H. Park, J. Jo [et al.] // Yonsei Med. J. – 2015. – May, Vol. 56(3). – P. 744–752. XVI. Long-term outcome of joint-preserving surgery by combination metatarsal osteotomies for shortening for forefoot deformity in patients with rheumatoid arthritis [Text] / H. Niki, T. Hirano, Y. Akiyama [et al.] // Mod. Rheumatol. – 2015. – Sep., Vol. 25(5). – P. 683–638. XVII. Maceira, E. Transfer metatarsalgia post hallux valgus surgery [Text] / E. Maceira, M. Monteagudo // Foot Ankle Clin. – 2014. – Jun., Vol. 19(2). – P.285–307. XVIII. Nielson, D.L. Absorbable fixation in forefoot surgery: a viable alternative to metallic hardware [Text] / D.L. Nielson, N.J. Young, C.M. Zelen // Clin. Podiatr. Med. Surg. – 2013. – Jul., Vol. 30(3). – P. 283–293 XIX. Patient’s satisfaction after outpatient forefoot surgery: Study of 619 cases [Text] / A. Mouton, V. Le Strat, D. Medevielle [et al.] // Orthop. Traumatol. Surg. Res. – 2015. – Oct., Vol. 101(6 Suppl.). – P. S217–S220. XX. Preference of surgical procedure for the forefoot deformity in the rheumatoid arthritis patients–A prospective, randomized, internal controlled study [Text] / M. Tada, T. Koike, T. Okano [et al.] // Mod. Rheumatol. – 2015. – May., Vol. 25(3). – P.362–366. XXI. Redfern, D. Percutaneous Surgery of the Forefoot [Text] / D. Redfern, J. Vernois, B.P. Legré // Clin. Podiatr. Med. Surg. – 2015. – Jul., Vol. 32(3). – P. 291–332. XXII. Singh, D. Bullous pemphigoid after bilateral forefoot surgery [Text] / D. Singh, A. Swann // Foot Ankle Spec. – 2015. – Feb., Vol. 8(1). – P. 68–72. XXIII. Treatment of moderate hallux valgus by percutaneous, extra-articular reverse-L Chevron (PERC) osteotomy [Text] / J. Lucas y Hernandez, P. Golanó, S. Roshan-Zamir [et al.] // Bone Joint J. – 2016. – Mar., Vol. 98-B(3). – P. 365–373. XXIV. Weil, L.Jr. Scarf osteotomy for correction of hallux abducto valgus deformity [Text] / L.Jr. Weil, M. Bowen // Clin. Podiatr. Med. Surg. – 2014. – Apr., Vol.31(2). – P. 233–246. View | Download QUANTITATIVE ULTRASONOGRAPHY OF THE STOMACH AND SMALL INTESTINE IN HEALTHYDOGS Authors: Roman A. Tcygansky,Irina I. Nekrasova,Angelina N. Shulunova,Alexander I.Sidelnikov, DOI: https://doi.org/10.26782/jmcms.spl.10/2020.06.00045 Abstract: Purpose.To determine the quantitative echogenicity indicators (and their ratio) of the layers of stomach and small intestine wall in healthy dogs. Methods. A prospective 3-year study of 86 healthy dogs (aged 1-7 yrs) of different breeds and of both sexes. Echo homogeneity and echogenicity of the stomach and intestines wall were determined by the method of Silina, T.L., et al. (2010) in absolute values of average brightness levels of ultrasound image pixels using the 8-bit scale with 256 shades of gray. Results. Quantitative echogenicity indicators of the stomach and the small intestine wall in dogs were determined. Based on the numerical values characterizing echogenicity distribution in each layer of a separate structure of the digestive system, the coefficient of gastric echogenicity is determined as 1:2.4:1.1 (mucosa/submucosa/muscle layers, respectively), the coefficient of duodenum and jejunum echogenicity is determined as 1:3.5:2 and that of ileum is 1:1.8:1. Clinical significance. The echogenicity coefficient of the wall of the digestive system allows an objective assessment of the stomach and intestines wall and can serve as the basis for a quantitative assessment of echogenicity changes for various pathologies of the digestive system Keywords: Ultrasound (US),echogenicity,echogenicity coefficient,digestive system,dogs,stomach,intestines, Refference: I. Agut, A. Ultrasound examination of the small intestine in small animals // Veterinary focus. 2009.Vol. 19. No. 1. P. 20-29. II. Bull. 4.RF patent 2398513, IPC51A61B8 / 00 A61B8 / 14 (2006.01) A method for determining the homoechogeneity and the degree of echogenicity of an ultrasound image / T. Silina, S. S. Golubkov. – No. 2008149311/14; declared 12/16/2008; publ. 09/10/2010 III. Choi, M., Seo, M., Jung, J., Lee, K., Yoon, J., Chang, D., Park, RD. Evaluation of canine gastric motility with ultrasonography // J. of Veterinary Medical Science. – 2002. Vol. 64. – № 1. – P. 17-21. IV. Delaney, F., O’Brien, R.T., Waller, K.Ultrasound evaluation of small bowel thickness compared to weight in normal dogs // Veterinary Radiology and Ultrasound. 2003 Vol. 44, № 5. Р 577-580. V. Diana, A., Specchi, S., Toaldo, M.B., Chiocchetti, R., Laghi, A., Cipone, M. Contrast-enhanced ultrasonography of the small bowel in healthy cats // Veterinary Radiology and Ultrasound. – 2011. – Vol. 52, № 5. – Р. 555-559. VI. Garcia, D.A.A., Froes, T.R. Errors in abdominal ultrasonography in dogs and cats // J. of Small Animal Practice. – 2012. Vol. 53. – № 9. – P. 514-519. VII. Garcia, D.A.A., Froes, T.R. Importance of fasting in preparing dogs for abdominal ultrasound examination of specific organs // J. of Small Animal Practice. – 2014. Vol. 55. – № 12. – P. 630-634. VIII. Gaschen, L., Granger, L.A., Oubre, O., Shannon, D., Kearney, M., Gaschen, F. The effects of food intake and its fat composition on intestinal echogenicity in healthy dogs // Veterinary Radiology and Ultrasound. 2016. Vol. 57. № 5. P. 546-550 IX. Gaschen, L., Kircher, P., Stussi, A., Allenspach, K., Gaschen, F., Doherr, M., Grone, A. Comparison of ultrasonographic findings with clinical activity index (CIBDAI) and diagnosis in dogs with chronic enteropathies // Veterinary radiology and ultrasound. – 2008. – Vol. 49. – № 1. – Р. 56-64. X. Gil, E.M.U. Garcia, D.A.A. Froes, T.R. In utero development of the fetal intestine: Sonographic evaluation and correlation with gestational age and fetal maturity in dogs // Theriogenology. 2015. Vol. 84, №5. Р. 681-686. XI. Gladwin, N.E. Penninck, D.G., Webster, C.R.L. Ultrasonographic evaluation of the thickness of the wall layers in the intestinal tract of dogs // American Journal of Veterinary Research. 2014. Vol. 75, №4. Р. 349-353. XII. Gory, G., Rault, D.N., Gatel, L, Dally, C., Belli, P., Couturier, L., Cauvin, E. Ultrasonographic characteristics of the abdominal esophagus and cardia in dogs // Veterinary Radiology and Ultrasound. 2014. Vol. 55, № 5. P. 552-560. XIII. Günther, C.S. Lautenschläger, I.E., Scholz, V.B. Assessment of the inter- and intraobserver variability for sonographical measurement of intestinal wall thickness in dogs without gastrointestinal diseases | [Inter-und Intraobserver-Variabilitätbei der sonographischenBestimmung der Darmwanddicke von HundenohnegastrointestinaleErkrankungen] // Tierarztliche Praxis Ausgabe K: Kleintiere – Heimtiere. 2014. Vol. 42 №2. Р. 71-78. XIV. Hanazono, K., Fukumoto, S., Hirayama, K., Takashima, K., Yamane, Y., Natsuhori, M., Kadosawa, T., Uchide, T. Predicting Metastatic Potential of gastrointestinal stromal tumors in dog by ultrasonography // J. of Veterinary Medical Science. – 2012. Vol. 74. – № 11. – P. 1477-1482. XV. Heng, H.G., Lim, Ch.K., Miller, M.A., Broman, M.M.Prevalence and significance of an ultrasonographic colonic muscularishyperechoic band paralleling the serosal layer in dogs // Veterinary Radiology and Ultrasound. 2015. Vol. 56 № 6. P. 666-669. XVI. Ivančić, M., Mai, W. Qualitative and quantitative comparison of renal vs. hepatic ultrasonographic intensity in healthy dogs // Veterinary Radiology and Ultrasound. 2008. Vol. 49. № 4. Р. 368-373. XVII. Lamb, C.R., Mantis, P. Ultrasonographic features of intestinal intussusception in 10 dogs // J. of Small Animal Practice. – 2008. Vol. 39. – № 9. – P. 437-441. XVIII. Le Roux, A. B., Granger, L.A., Wakamatsu, N, Kearney, M.T., Gaschen, L.Ex vivo correlation of ultrasonographic small intestinal wall layering with histology in dogs // Veterinary Radiology and Ultrasound.2016. Vol. 57. № 5. P. 534-545. XIX. Nielsen, T. High-frequency ultrasound of Peyer’s patches in the small intestine of young cats / T. Nielsen [et al.] // Journal of Feline Medicine and Surgery. – 2015. – Vol. 18, № 4. – Р. 303-309. XX. PenninckD.G. Gastrointestinal tract. In Nyland T.G., Mattoon J.S. (eds): Small Animal Diagnostic Ultrasound. Philadelphia: WB Saunders. 2002, 2nd ed. Р. 207-230. XXI. PenninckD.G. Gastrointestinal tract. In: PenninckD.G.,d´Anjou M.A. Atlas of Small Animal Ultrasonography. Blackwell Publishing, Iowa. 2008. Р. 281-318. XXII. Penninck, D.G., Nyland, T.G., Kerr, L.Y., Fisher, P.E. Ultrasonographic evaluation of gastrointestinal diseases in small animals // Veterinary Radiology. 1990. Vol. 31. №3. P. 134-141. XXIII. Penninck, D.G.,Webster, C.R.L.,Keating, J.H. The sonographic appearance of intestinal mucosal fibrosis in cats // Veterinary Radiology and Ultrasound. – 2010. – Vol. 51, № 4. – Р. 458-461. XXIV. Pollard, R.E.,Johnson, E.G., Pesavento, P.A., Baker, T.W., Cannon, A.B., Kass, P.H., Marks, S.L. Effects of corn oil administered orally on conspicuity of ultrasonographic small intestinal lesions in dogs with lymphangiectasia // Veterinary Radiology and Ultrasound. 2013. Vol. 54. № 4. P. 390-397. XXV. Rault, D.N., Besso, J.G., Boulouha, L., Begon, D., Ruel, Y. Significance of a common extended mucosal interface observed in transverse small intestine sonograms // Veterinary Radiology and Ultrasound. 2004. Vol. 45. №2. Р. 177-179. XXVI. Sutherland-Smith, J., Penninck, D.G., Keating, J.H., Webster, C.R.L. Ultrasonographic intestinal hyperechoic mucosal striations in dogs are associated with lacteal dilation // Veterinary Radiology and Ultrasound. – 2007. Vol. 48. – № 1. – P. 51-57. View | Download EVALUATION OF ADAPTIVE POTENTIAL IN MEDICAL STUDENTS IN THE CONTEXT OF SEASONAL DYNAMICS Authors: Larisa A. Merdenova,Elena A. Takoeva,Marina I. Nartikoeva,Victoria A. Belyayeva,Fatima S. Datieva,Larisa R. Datieva, DOI: https://doi.org/10.26782/jmcms.spl.10/2020.06.00046 Abstract: The aim of this work was to assess the functional reserves of the body to quantify individual health; adaptation, psychophysiological characteristics of the health quality of medical students in different seasons of the year. When studying the temporal organization of physiological functions, the rhythm parameters of physiological functions were determined, followed by processing the results using the Cosinor Analysis program, which reveals rhythms with an unknown period for unequal observations, evaluates 5 parameters of sinusoidal rhythms (mesor, amplitude, acrophase, period, reliability). The essence of desynchronization is the mismatch of circadian rhythms among themselves or destruction of the rhythms architectonics (instability of acrophases or their disappearance). Desynchronization with respect to the rhythmic structure of the body is of a disregulatory nature, most pronounced in pathological desynchronization. High neurotism, increased anxiety reinforces the tendency to internal desynchronization, which increases with stress. During examination stress, students experience a decrease in the stability of the temporary organization of the biosystem and the tension of adaptive mechanisms develops, which affects attention, mental performance and the quality of adaptation to the educational process. Time is shortened and the amplitude of the “initial minute” decreases, personal and situational anxiety develops, and the level of psychophysiological adaptation decreases. The results of the work are priority because they can be used in assessing quality and level of health. Keywords: Desynchronosis,biorhythms,psycho-emotional stress,mesor,acrophase,amplitude,individual minute, Refference: I. Arendt, J., Middleton, B. Human seasonal and circadian studies in Antarctica (Halley, 75_S) – General and Comparative Endocrinology. 2017: 250-259. (http://dx.doi.org/10.1016/j.ygcen.2017.05.010). II. BalandinYu.P. A brief methodological guide on the use of the agro-industrial complex “Health Sources” / Yu.P. Balandin, V.S. Generalov, V.F. Shishlov. Ryazan, 2007. III. Buslovskaya L.K. Adaptation reactions in students at exam stress/ L.K. Buslovskaya, Yu.P. Ryzhkova. Scientific bulletin of Belgorod State University. Series: Natural Sciences. 2011;17(21):46-52. IV. Chutko L. S. Sindromjemocionalnogovygoranija – Klinicheskie I psihologicheskieaspekty./ L.S Chutko. Moscow: MEDpress-inform, 2013. V. Eroshina K., Paul Wilkinson, Martin Mackey. The role of environmental and social factors in the occurrence of diseases of the respiratory tract in children of primary school age in Moscow. Medicine. 2013:57-71. VI. Fagrell B. “Microcirculation of the Skin”. The physiology and pharmacology of the microcirculation. 2013:423. VII. Gurova O.A. Change in blood microcirculation in students throughout the day. New research. 2013; 2 (35):66-71. VIII. Khetagurova L.G. – Stress/Ed. L.G. Khetagurov. Vladikavkaz: Project-Press Publishing House, 2010. IX. Khetagurova L.G., Urumova L.T. et al. Stress (chronomedical aspects). International Journal of Experimental Education 2010; 12: 30-31. X. Khetagurova L.G., Salbiev K.D., Belyaev S.D., Datieva F.S., Kataeva M.R., Tagaeva I.R. Chronopathology (experimental and clinical aspects/ Ed. L.G. Khetagurov, K.D. Salbiev, S.D.Belyaev, F.S. Datiev, M.R. Kataev, I.R. Tagaev. Moscow: Science, 2004. XI. KlassinaS.Ya. Self-regulatory reactions in the microvasculature of the nail bed of fingers in person with psycho-emotional stress. Bulletin of new medical technologies, 2013; 2 (XX):408-412. XII. Kovtun O.P., Anufrieva E.V., Polushina L.G. Gender-age characteristics of the component composition of the body in overweight and obese schoolchildren. Medical Science and Education of the Urals. 2019; 3:139-145. XIII. Kuchieva M.B., Chaplygina E.V., Vartanova O.T., Aksenova O.A., Evtushenko A.V., Nor-Arevyan K.A., Elizarova E.S., Efremova E.N. A comparative analysis of the constitutional features of various generations of healthy young men and women in the Rostov Region. 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Triadic comparison models are proposed as an alternative to dyadic comparison models. Comparison allows finding the common and the different; this approach is proposed for the analysis of the nomothetic and ideographic method of obtaining knowledge. The nomothetic method identifies and evaluates the general, while the ideographic method searches for unique in parameters and in combinations of parameters. Triadic comparison is used in systems and methods of argumentation, as well as in the analysis of consistency/inconsistency. Keywords: Comparative analysis,dyad,triad,triadic model,comparability relation,object comparison,attributive comparison,nomothetic method,ideographic method, Refference: I. AltafS., Aslam.M.Paired comparison analysis of the van Baarenmodel using Bayesian approach with noninformativeprior.Pakistan Journal of Statistics and Operation Research 8(2) (2012) 259{270. II. AmooreJ. E., VenstromD Correlations between stereochemical assessments and organoleptic analysis of odorous compounds. Olfaction and Taste (2016) 3{17. III. BarnesJ., KlingerR. Embedding projection for targeted cross-lingual sentiment: model comparisons and a real-world study. Journal of Artificial Intelligence Research 66 (2019) 691{742. doi.org/10.1613/jair.1.11561 IV. Castro-SchiloL., FerrerE.Comparison of nomothetic versus idiographic-oriented methods for making predictions about distal outcomes from time series data. Multivariate Behavioral Research 48(2) (2013) 175{207. V. De BonaG.et al. Classifying inconsistency measures using graphs. Journal of Artificial Intelligence Research 66 (2019) 937{987. VI. FideliR. La comparazione. Milano: Angeli, 1998. VII. GordonT. F., PrakkenH., WaltonD. The Carneades model of argument and burden of proof. Artificial Intelligence 10(15) (2007) 875{896. VIII. GrenzS.J. The social god and the relational self: A Triad theology of the imago Dei. Westminster: John Knox Press, 2001. IX. HermansH.J. M.On the integration of nomothetic and idiographic research methods in the study of personal meaning.Journal of Personality 56(4) (1988) 785{812. X. JamiesonK. G., NowakR. Active ranking using pairwise comparisons.Advances in Neural Information Processing Systems (2011) 2240{2248. XI. JongsmaC.Poythress’s triad logic: a review essay. Pro Rege 42(4) (2014) 6{15. XII. KärkkäinenV.M. Trinity and Religious Pluralism: The Doctrine of the Trinity in Christian Theology of Religions. London: Routledge, 2017. XIII. KudzhS. A., TsvetkovV.Ya. Triadic systems. Russian Technology Magazine 7(6) (2019) 74{882. XIV. NelsonK.E.Some observations from the perspective of the rare event cognitive comparison theory of language acquisition.Children’s Language 6 (1987) 289{331. XV. NiskanenA., WallnerJ., JärvisaloM.Synthesizing argumentation frameworks from examples. Journal of Artificial Intelligence Research 66 (2019) 503{554. XVI. PührerJ.Realizability of three-valued semantics for abstract dialectical frameworks.Artificial Intelligence 278 (2020) 103{198. XVII. SwansonG.Frameworks for comparative research: structural anthropology and the theory of action. In: Vallier, Ivan (Ed.). Comparative methods in sociology: essays on trends and applications.Berkeley: University of California Press, 1971 141{202. XVIII. TsvetkovV.Ya.Worldview model as the result of education.World Applied Sciences Journal 31(2) (2014) 211{215. XIX. TsvetkovV. Ya. Logical analysis and variable scales. Slavic Forum 4(22) (2018) 103{109. XX. Wang S. et al. Transit traffic analysis zone delineating method based on Thiessen polygon. Sustainability 6(4) (2014) 1821{1832. View | Download DEVELOPING TECHNOLOGY OF CREATING WEAR-RESISTANT CERAMIC COATING FOR ICE CYLINDER." JOURNAL OF MECHANICS OF CONTINUA AND MATHEMATICAL SCIENCES spl10, no. 1 (June 28, 2020). http://dx.doi.org/10.26782/jmcms.spl.10/2020.06.00048.

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