Journal articles on the topic 'Grouping Configuration'
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Ma-Wyatt, Anna, Colin W. G. Clifford, and Peter Wenderoth. "Contrast Configuration Influences Grouping in Apparent Motion." Perception 34, no. 6 (June 2005): 669–85. http://dx.doi.org/10.1068/p3444.
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We investigated whether the same principles that influence grouping in static displays also influence grouping in apparent motion. Using the Ternus display, we found that the proportion of group motion reports was influenced by changes in contrast configuration. Subjects made judgments of completion of these same configurations in a static display. Generally, contrast configurations that induced a high proportion of group motion responses were judged as more ‘complete’ in static displays. Using a stereo display, we then tested whether stereo information and T-junction information were critical for this increase in group motion. Perceived grouping was consistently higher for same contrast polarity configurations than for opposite contrast polarity configurations, regardless of the presence of stereo information or explicit T-junctions. Thus, while grouping in static and moving displays showed a similar dependence on contrast configuration, motion grouping showed little dependence on stereo or T-junction information.
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Overvliet, Krista E., Kim Verlaers, Ralf T. Krampe, and Johan Wagemans. "The effect of perceptual grouping on haptic numerosity perception." Seeing and Perceiving 25 (2012): 183. http://dx.doi.org/10.1163/187847612x648134.
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In order to investigate the effect of perceptual grouping on haptic numerosity perception, we asked participants to explore tangible dot patterns and report the number of dots present in the display. We hypothesized that when there are subsets of dots that can be grouped together, exploration time will be shorter as compared to a display where no grouping takes place. The base display consists of dots that are equally spaced on a straight line. We manipulated subset grouping by using both proximity and configurational cues. By placing subsets of dots closer together or placing them in a spatial configuration (e.g., in a triangular shape with three dots, or a rectangular shape with four dots), while keeping the total exploration distance constant, we expected to find shorter exploration times as compared to the base display. The results indeed show that both these cues yield faster exploration. We therefore conclude that both proximity and configurational information can influence haptic grouping for numerosity judgments.
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Lehar, S. "Generalised Model of Illusory Grouping Accounts for Collinear, Orthogonal, and Vertex Grouping Percepts." Perception 25, no. 1_suppl (August 1996): 91. http://dx.doi.org/10.1068/v96l0704.
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A number of illusory phenomena, for example the Kanizsa illusion, exhibit boundary completion by collinearity between visible inducing edges. These phenomena have been addressed by models such as Grossberg's boundary contour system (BCS) (1985 Psychological Review92 173 – 211), which incorporates collinearity cells with receptive fields specialised to detect and enhance collinearity. Other illusory phenomena like the Ehrenstein illusion exhibit boundary completion orthogonal to the oriented inducers. The BCS model explains such orthogonal grouping by disinhibition, due to competition between collinearity cells of orthogonal orientations. There are many illusory grouping phenomena, however, which exhibit boundary completion through sharp corners in a variety of configurations, producing illusory ‘V’ or ‘Y’ vertices. Examples are seen in the diamond percept of the four-line Ehrenstein illusion, the triangular grouping percept of three dots arranged in a triangular configuration, as well as in the hexagonal percept of a grid of dots in a honeycomb pattern. These completions cannot be explained by models based on collinearity. Lehar's orientational harmonic model (1994, PhD thesis, Boston University) offers a single generalised grouping mechanism capable of collinear, orthogonal, and sharp vertex grouping. The proposed mechanism is a harmonic resonance, or pattern of standing waves in the orientational representation which promotes orientational periodicity. Computer simulations show that the model can account for a large number of diverse illusory phenomena using a single simple mechanism, and predicts the specific conditions under which a grouping of one type yields to a different grouping type.
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KIM, Young-Beom. "On the Optimal Configuration of Grouping-Based Framed Slotted ALOHA." IEICE Transactions on Information and Systems E101.D, no. 11 (November 1, 2018): 2823–26. http://dx.doi.org/10.1587/transinf.2018edl8093.
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Jin, Yan, Kee Wook Rim, Kee Cheon Kim, and Min Wei. "A Multi-Hop Grouping Scheme for Assisting Handoff Procedure in Vehicular Networks." Applied Mechanics and Materials 121-126 (October 2011): 3719–25. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.3719.
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The duplicate address detection (DAD) has been a time-costly and a bottleneck in IP address configuration. The dynamic host configuration protocol (DHCP) was proposed and adopted to effectively assign unique address to a host. However, DHCP is not suitable for networks with a large number of nodes, and address renumbering under DHCP would be much more complicated than that under stateless auto-configuration. In vehicular networks, moving vehicles get connected to the Internet through the access point set up by the road. The handoff operation is supposed to happen frequently due to the fast moving of vehicles. Therefore, the performance of handoff becomes one of the most important issues to maintain seamlessly connection to the Internet in vehicular environment. In this paper, we propose a multi-hop group assisted handoff algorithm to effectively reduce handoff latency for avoiding the impact of time-consuming from IP configuration operation.
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Li, Jixing, Tao Ning, Tian Wang, Bifu Hu, Ping Xi, and Jingliang Xu. "A rapid parameter configuration method for film hole component in pipe-net calculation." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 234, no. 7 (November 27, 2019): 915–33. http://dx.doi.org/10.1177/0957650919889454.
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Film hole component is one of the most important cooling components in pipe-net calculation for blade design. However, owing to a large number of gas film holes, manual parameter configuration for film hole components will affect the efficiency of pipe-net calculation. Extracting parameters from the geometric structure of film holes automatically could significantly shorten the time consumption of pipe-net calculation. In this paper, numeric analysis parameter and group data required by film hole components were summarized and analyzed, based on which a parameter configuration strategy was proposed. Aiming at the extraction of group data, a film hole grouping method was presented. By converting the grouping requirements in fluid-heat analysis into a geometric row pattern recognition problem, it further redefines the geometric row as a linear distribution by a projection method and a parametric mapping method and finally solves the grouping problem by a linear search algorithm. A numeric parameter extraction method was put forward to redefine analysis parameters with geometric properties and identify certain geometry primitives. The proposed algorithm and method are verified with instances. The results illustrate that our method could shorten parameter configuration process of film hole component into several minutes from several hours in manual, with more reliable accuracy.
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Quek, Genevieve L., and Marius V. Peelen. "Contextual and Spatial Associations Between Objects Interactively Modulate Visual Processing." Cerebral Cortex 30, no. 12 (August 5, 2020): 6391–404. http://dx.doi.org/10.1093/cercor/bhaa197.
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Abstract Much of what we know about object recognition arises from the study of isolated objects. In the real world, however, we commonly encounter groups of contextually associated objects (e.g., teacup and saucer), often in stereotypical spatial configurations (e.g., teacup above saucer). Here we used electroencephalography to test whether identity-based associations between objects (e.g., teacup–saucer vs. teacup–stapler) are encoded jointly with their typical relative positioning (e.g., teacup above saucer vs. below saucer). Observers viewed a 2.5-Hz image stream of contextually associated object pairs intermixed with nonassociated pairs as every fourth image. The differential response to nonassociated pairs (measurable at 0.625 Hz in 28/37 participants) served as an index of contextual integration, reflecting the association of object identities in each pair. Over right occipitotemporal sites, this signal was larger for typically positioned object streams, indicating that spatial configuration facilitated the extraction of the objects’ contextual association. This high-level influence of spatial configuration on object identity integration arose ~ 320 ms post-stimulus onset, with lower-level perceptual grouping (shared with inverted displays) present at ~ 130 ms. These results demonstrate that contextual and spatial associations between objects interactively influence object processing. We interpret these findings as reflecting the high-level perceptual grouping of objects that frequently co-occur in highly stereotyped relative positions.
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Khalili, A., and D. K. Chua. "Integrated Prefabrication Configuration and Component Grouping for Resource Optimization of Precast Production." Journal of Construction Engineering and Management 140, no. 2 (February 2014): 04013052. http://dx.doi.org/10.1061/(asce)co.1943-7862.0000798.
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Bukhteyeva, I. V., and S. L. Petukhov. "Efficiency improvement of automatic assembly in automotive and tractor engineering." Traktory i sel hozmashiny 82, no. 5 (May 15, 2015): 48–51. http://dx.doi.org/10.17816/0321-4443-65482.
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Results of selecting of optimal number of technological equipment for the automatic assembly of gearboxes are given. A method for items grouping is presented; selecting of optimal configuration of flexible assembly system is substantiated mathematically.
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Zou, Wei, Danfeng Hu, Xin Gao, and Jiajun Wang. "A reconstruction method for diffuse optical tomography by grouping of source-detector configuration." Journal of Modern Optics 64, no. 7 (November 23, 2016): 771–76. http://dx.doi.org/10.1080/09500340.2016.1260780.
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R. Q. A. Fernandes, W. A. Pinheiro, G. B. Xexéo, and J. M. de Souza. "Path Clustering: Grouping in a Efficient Way Complex Data Distributions." Journal on Today's Ideas - Tomorrow's Technologies 5, no. 2 (December 28, 2017): 141–55. http://dx.doi.org/10.15415/jotitt.2017.52009.
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This work proposes an algorithm that uses paths based on tile segmentation to build complex clusters. After allocating data items (points) to geometric shapes in tile format, the complexity of our algorithm is related to the number of tiles instead of the number of points. The main novelty is the way our algorithm goes through the grids, saving time and providing good results. It does not demand any configuration parameters from users, making easier to use than other strategies. Besides, the algorithm does not create overlapping clusters, which simplifies the interpretation of results.
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Baboli, Hossein, and Alain Guinet. "A New Method for the Configuration of Cellular Manufacturing Systems: Multicriteria Machines Grouping Algorithm." IFAC Proceedings Volumes 33, no. 17 (July 2000): 855–60. http://dx.doi.org/10.1016/s1474-6670(17)39515-0.
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Liu, Shengcai, Ke Tang, and Xin Yao. "Automatic Construction of Parallel Portfolios via Explicit Instance Grouping." Proceedings of the AAAI Conference on Artificial Intelligence 33 (July 17, 2019): 1560–67. http://dx.doi.org/10.1609/aaai.v33i01.33011560.
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Exploiting parallelism is becoming more and more important in designing efficient solvers for computationally hard problems. However, manually building parallel solvers typically requires considerable domain knowledge and plenty of human effort. As an alternative, automatic construction of parallel portfolios (ACPP) aims at automatically building effective parallel portfolios based on a given problem instance set and a given rich configuration space. One promising way to solve the ACPP problem is to explicitly group the instances into different subsets and promote a component solver to handle each of them. This paper investigates solving ACPP from this perspective, and especially studies how to obtain a good instance grouping. The experimental results on two widely studied problem domains, the boolean satisfiability problems (SAT) and the traveling salesman problems (TSP), showed that the parallel portfolios constructed by the proposed method could achieve consistently superior performances to the ones constructed by the state-of-the-art ACPP methods, and could even rival sophisticated hand-designed parallel solvers.
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Cosden, Merith A., and Judy P. English. "The Effects of Grouping, Self Esteem, and Locus of Control on Microcomputer Performance and Help Seeking by Mildly Handicapped Students." Journal of Educational Computing Research 3, no. 4 (November 1987): 443–60. http://dx.doi.org/10.2190/wump-cfdy-jfpm-lw3c.
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The impact of grouping, learning handicap, locus of control, and self esteem on students' performance on a math problem-solving program was assessed in two studies. Outcome measures included: 1) the level of difficulty at which students selected to work, 2) use of a program help command, and 3) response accuracy with and without help. Despite indication from the non-computer instructional literature that grouping would facilitate problem-solving skills for some students, neither problem selections nor performance accuracy varied as a function of group configuration. Personal characteristics influenced problem selections, help seeking, and accuracy in anticipated directions but not consistently. More consistent patterns were noted as a function of initial student competency in math.
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DEL RÍO-OSPINA, L., S. C. SOTO-DE LEÓN, M. CAMARGO, R. SÁNCHEZ, D. A. MORENO-PÉREZ, A. PÉREZ-PRADOS, M. E. PATARROYO, and M. A. PATARROYO. "Multiple high-risk HPV genotypes are grouped by type and are associated with viral load and risk factors." Epidemiology and Infection 145, no. 7 (February 10, 2017): 1479–90. http://dx.doi.org/10.1017/s0950268817000188.
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SUMMARYInvestigating whether high-risk human papillomavirus (HR-HPV) types tend to become grouped in a particular way and whether factors are associated with such grouping is important for measuring the real impact of vaccination. In total, 219 women proving positive for HPV as detected by real-time PCR were included in the study. Each sample was analysed for detecting and quantifying six viral types and the hydroxymethylbilane synthase gene. Multiple correspondence analysis led to determining grouping patterns for six HR-HPV types and simultaneous association with multiple variables and whether viral load was related to the coexistence of other viral types. Two grouping profiles were identified: the first included HPV-16 and HPV-45 and the second profile was represented by HPV-31, HPV-33 and HPV-58. Variables such as origin, contraceptive method, births and pregnancies, educational level, healthcare affiliation regime, atypical squamous cells of undetermined significance and viral load were associated with these grouping profiles. Different socio-demographic characteristics were found when coinfection occurred by phylogenetically related HPV types and when coinfection was due to non-related types. Biological characteristics, the number of viral copies, temporality regarding acquiring infection and competition between viral types could influence the configuration of grouping patterns. Characteristics related to women and HPV, influence such interactions between coexisting HPV types reflecting the importance of their evaluation.
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Qi, Fei, Xuetian Zhu, Xinran Zhang, and Songlin Sun. "Hybrid Multicast Transmission for Public Safety Network in 5G." Mobile Information Systems 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/4306356.
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We investigate the application of wireless multicast technology in public safety network (PSN) in future wireless communication system. The hybrid unicast/multicast transmission system is proposed and analyzed in 3D massive multi-input multioutput (MIMO) channel. The mutual coupling channel model is adopted under the different antenna array configuration scenarios. The proposed hybrid system adopts multicast beamforming in the multicast groups as well as multiuser-MIMO (MU-MIMO) linear precoding in the unicast group to increase system throughput. The null space method based interference cancellation is further performed between each group to eliminate signal leakage generated from each group. Comparisons between two types of antenna array configurations, different channel models, linear precoding as well as multicast beamforming, and user grouping strategies for multicast services are presented and analyzed by simulation.
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Lim, Seokbin, Philipp Baldovi, and Christopher Rood. "Jet Grouping of Linear-Shaped Charges and Penetration Performance." Applied Sciences 12, no. 24 (December 13, 2022): 12768. http://dx.doi.org/10.3390/app122412768.
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There have been many studies on the penetration performance of conical-shaped charges (CSCs) in various applications. These studies have led to a great deal of improvement, and even breakthroughs, in the design of CSCs. These studies have also positively affected the design of linear-shaped charges (LSCs), but due to the comparatively low penetration performance of LSCs there has been little theory-based scientific study of their penetration performance. In this paper, empirically observed field testing data are presented, including the details of the penetration performance and configuration of the LSC jet against UHMW-PE (ultra-high molecular weight polyethylene) targets using a series of flash X-ray exposures. These findings are compared to the previously published theoretical analysis in order to understand the nature of the formation, penetration, and classification/grouping of LSC jets. After a series of empirical and theoretical investigations, it was concluded that the LSC jet can be grouped depending on the jet particulation and distribution pattern, and each jet group exhibits different penetration performance. The relationship between liner collapse angle and jet segment density suggests potential room for performance improvement.
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Garcia-Villegas, Eduard, Alejandro Lopez-Garcia, and Elena Lopez-Aguilera. "Genetic Algorithm-Based Grouping Strategy for IEEE 802.11ah Networks." Sensors 23, no. 2 (January 12, 2023): 862. http://dx.doi.org/10.3390/s23020862.
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The IEEE 802.11ah standard is intended to adapt the specifications of IEEE 802.11 to the Internet of Things (IoT) scenario. One of the main features of IEEE 802.11ah consists of the Restricted Access Window (RAW) mechanism, designed for scheduling transmissions of groups of stations within certain periods of time or windows. With an appropriate configuration, the RAW feature reduces contention and improves energy efficiency. However, the standard specification does not provide mechanisms for the optimal setting of RAW parameters. In this way, this paper presents a grouping strategy based on a genetic algorithm (GA) for IEEE 802.11ah networks operating under the RAW mechanism and considering heterogeneous stations, that is, stations using different modulation and coding schemes (MCS). We define a fitness function from the combination of the predicted system throughput and fairness, and provide the tuning of the GA parameters to obtain the best result in a short time. The paper also includes a comparison of different alternatives with regard to the stages of the GA, i.e., parent selection, crossover, and mutation methods. As a proof of concept, the proposed GA-based RAW grouping is tested on a more constrained device, a Raspberry Pi 3B+, where the grouping method converges in around 5 s. The evaluation concludes with a comparison of the GA-based grouping strategy with other grouping approaches, thus showing that the proposed mechanism provides a good trade-off between throughput and fairness performance.
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Forza, Cipriano, Alessio Trentin, and Fabrizio Salvador. "Supporting product configuration and form postponement by grouping components into kits: the case of MarelliMotori." International Journal of Mass Customisation 1, no. 4 (2006): 427. http://dx.doi.org/10.1504/ijmassc.2006.010443.
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Casco, Clara, and Michael Morgan. "Detection of Moving Local Density Differences in Dynamic Random Patterns by Human Observers." Perception 16, no. 6 (December 1987): 711–17. http://dx.doi.org/10.1068/p160711.
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The way in which movement enhances target visibility has been investigated by measuring the detectability of the direction of motion of a dot pattern added to a background of dynamic visual noise. When the positions of all the dots were changed randomly from frame to frame, so that there was no dot configuration to define the target area (experiments 1 and 2), the threshold density difference necessary was for direction of motion detection less than 3 dots/frame (between 20% and 50% density difference). The spatial displacement (S) at which optimal detection occurs increased when a target elongated in the direction of motion was used. If S was either larger or smaller than its optimal value, thresholds rose progressively. The rise in threshold when S was smaller than 0.25 deg (the width of the target area) decreased when the target dots had a fixed spatial arrangement (experiment 3). It is suggested that in both fixed and random target configurations there is a grouping of dots with similar trajectories via a global directionally-selective process. The strength of the overall motion signal is greater in the fixed-dot configuration because each target dot has associated with it a vector precisely aligned in the direction of the target motion.
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Stojanovic, Nebojsa, Ivica Stefanovic, Aleksandar Kostic, Radisav Mitic, Misa Radisavljevic, Dragan Stojanov, and Sladjana Petrovic. "Analysis of the symmetric configuration of the circle of Willis in a series of autopsied corpses." Vojnosanitetski pregled 72, no. 4 (2015): 356–60. http://dx.doi.org/10.2298/vsp1504356s.
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Introduction. The forming of the blood vessels network configuration at the base of the brain and interconnecting of blood vessels during the embryogenesis is directly related to the phylogenetic development of the brain and brain structures. A blood vessel configuration at the brain base, in the form of a ring or a hexagon, stands in direct relation to the perfusion needs of certain parts of the brain during its primary differentiation. The aim of this paper was to determine the incidence of certain blood vessel configurations at the base of the brain and understanding their symmetry or asymmetry. Methods. Analysis of the blood vessels at the base of the brain was performed on the autopsied subjects. The object of observation was the anterior segment of the circle of Willis consisting of C1- a. carotis interna (ICA), above a. communicaus posterior (PcoA), the segment A1 a. cerebri anterior (ACA) from a. carotis interna bifurcation to the a. communicans anterior (AcoA) and a. communicans anterior itself, as well as the posterior segment consisting of PcoA and the segment P1 - a. cerebri posterior (PCA) from the a. basilaris bifurcation to the PcoA. For the purpose of grouping the findings, the four basic configuration types of the circle of Willis were identified based on its symmetry or asymmetry. Type-A (symmetric circle of Willis), type-B (asymmetric circle of Willis' due to the unilateral hypoplastic A1-ACA); type-C (symmetric circle of Willis with bilateral symmetric changes on PcoA) and type-D (asymmetric circle of Willis due to the asymmetric changes on PcoA). Results. Autopsy was performed on 56 corpses. A total of 41 (73.2%) subjects were recorded with a symmetric configuration of the circle of Willis', of which 27 (48.2%) subjects had type A and 14 (25%) type C. The asymmetric configuration was present in 15 (26.8%) subjects, of whom 9 (16%) had type B and 6 (10.8%) type D. The symmetric Willis group (73.2%) did not have a homogeneous finding that would fit into the schematic presentation of the symmetric type A and type C. A total of 17 (30.4%) findings were classified in this group of the so-called conditionally symmetric configurations. In all the cases, type B (16%) had unilaterally reduced diameter A1 and hyperplastic AcoA. Conclusion. The presence of asymmetric Willis configuration in 26.8% of the cases, which makes up more than one fourth, indicates that the asymmetric configurations do not represent a pathological form of connecting the blood vessels at the base of the brain, but rather one aspect of its adaptation. The forming of the basic types of configurations of the circle of Willis is associated with a tendency toward certain types of hemodynamic disorders and more frequent pathological changes in places of reduced resistance.
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Hariyadi, I. Putu, and Khairan Marzuki. "Implementation Of Configuration Management Virtual Private Server Using Ansible." MATRIK : Jurnal Manajemen, Teknik Informatika dan Rekayasa Komputer 19, no. 2 (May 30, 2020): 347–57. http://dx.doi.org/10.30812/matrik.v19i2.724.
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Virtualization technology has been applied to universities with computer study programs to support practicum in Network Management courses. Each user gets a Virtual Private Server (VPS) with container technology. VPS system that is prepared manually requires a long time, especially when the number of users is increasing. The activity repeats every semester so it becomes ineffective and inefficient. Application of automation using Ansible can help to manage VPS objects in the Promox Virtual Environment (PVE) Cluster dynamically. Network Development Life Cycle (NDLC) was used as a method in this study. The design of the VPS management automation system created supports the grouping of container, user and permission resource management for users. The design is implemented in Ansible Playbook. The test results show the average time of making VPS objects per student with an automation system 2 (two) times faster, that is 26.25 seconds compared to the old system which takes 2 minutes 15 seconds. Besides that, the Playbook that was created succeeded in automating the start and stop containers per group of students based on the practicum schedule dynamically so as to maintain the availability of services from the PVE Cluster.
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Valente Ferreira, Julio Cesar, Thiago Ribeiro Furtado, Rafael Dirques David Regis, Gabriela Rodrigues Diniz, Paula Gonçalves, and Vitor Pedro da Silva Castelo Tavares. "Anime clustering for automatic classification and configuration of demographics." Cuadernos.info, no. 54 (2023): 67–94. http://dx.doi.org/10.7764/cdi.54.53193.
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The cultural industry assumed greater relevance as a productive system and expanded its market share with different forms of reception, transmission, and communication with the public, increasingly using the so called classification and recommendation algorithms and manipulation of mass processed data, which do not require cyber-physical systems for cataloging andconstant feedback from all parties involved for cataloging. In this regard, this paper proposes a methodology to support the classification and creation of corresponding groups, automatically, of cultural productions of certain segments through Robot Process Automation (RPA) techniques, to first extract public data created by fans of certain cultural segments, and Latent Dirichlet Allocation (LDA), for the clustering of these productions based on the data of the terms extracted by RPA. As a case study for this proposal, we specifically observed the anime market, defined as an originally Japanese cultural product with high fan engagement and high annual production scale, supported by data obtained from two public databases data: MyAnimeList and AniDB, built collaboratively by fans. The application of the methodology allowed the automatic classification of anime, grouping them into topics that allow the proposal of a new demography of products of this genre in relation to the current one, providing a greater level of detail and allowing to contemplate the expansion of new themes.
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Nicholas, P. Emmanuel, K. P. Padmanaban, and M. C. Lenin Babu. "Multi-Objective Optimization of Laminated Composite Plate with Diffused Layer Angles using Non-Dominated Sorting Genetic Algorithm (NSGA-II)." Advanced Composites Letters 23, no. 4 (July 2014): 096369351402300. http://dx.doi.org/10.1177/096369351402300403.
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An approach to design the laminated composite plate subjected to in-plane loading conditions is investigated. The composite structure is optimized for the conflicting multi-objectives maximum buckling load factor and minimum weight. Fibre orientation angles, stacking sequence and number of layers are chosen as design variables. In order to avoid the inter-laminar stress developed due to grouping of plies, design of laminated plate with diffused stacking sequences is proposed in this work. In-plane strength of the laminate and not grouping more than four plies of same orientation are set as the design constraints. Static failure criteria (Tsai-Wu and Maximum Stress) are used to determine the load bearing capacity for a configuration generated during the optimization process. The effectiveness of the proposed approach is explored with two optimization problems. In the first problem a simple genetic algorithm (SGA) is applied to maximize the buckling load factor of the composite plate. In the second problem, a multi-objective genetic algorithm (NSGA-II) is used to obtain Pareto optimal designs for the problem having multiple, conflicting, objectives minimum weight and maximum buckling load factor. The results show that better design can be obtained with diffused angle layers and the grouping of plies can also be completely eliminated.
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Lieber, Joan, and Melvyn I. Semmel. "The Relationship of Group Configuration to the Interactions of Students Using Microcomputers." Journal of Special Education Technology 10, no. 1 (September 1989): 14–23. http://dx.doi.org/10.1177/016264348901000102.
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In order to maximize student access to microcomputers, teachers have assigned students to work at the computer in groups. There is little empirical evidence, however, to indicate the effect of grouping students on the social and instructional interactions that occur within those groups. Twenty learning-handicapped and twenty nonhandicapped boys from upper elementary grades participated for 10 minutes, three times per week for a 4-week period on a mathematics problem-solving task. Students worked in three different configurations: individually, with a handicapped partner, and with a nonhandicapped partner. All sessions were videotaped and interactions that occurred were assigned to categories using an observational instrument. Results indicated that nonhandicapped students behaved differently in heterogeneous dyads and homogeneous dyads. In heterogeneous dyads they made more management comments and used the computer rather than their partner as a resource. The task-related behavior of learning-handicapped students was similar in both configurations. As the task became more difficult, instructional behavior increased in all dyads. In all dyads, interactions were primarily task-related and positive in tone.
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Harrar, Vanessa, and Laurence R. Harris. "Multimodal Ternus: Visual, Tactile, and Visuo — Tactile Grouping in Apparent Motion." Perception 36, no. 10 (October 2007): 1455–64. http://dx.doi.org/10.1068/p5844.
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Gestalt rules that describe how visual stimuli are grouped also apply to sounds, but it is unknown if the Gestalt rules also apply to tactile or uniquely multimodal stimuli. To investigate these rules, we used lights, touches, and a combination of lights and touches, arranged in a classic Ternus configuration. Three stimuli (A, B, C) were arranged in a row across three fingers. A and B were presented for 50 ms and, after a delay, B and C were presented for 50 ms. Subjects were asked whether they perceived AB moving to BC (group motion) or A moving to C (element motion). For all three types of stimuli, at short delays, A to C dominated, while at longer delays AB to BC dominated. The critical delay, where perception changed from group to element motion, was significantly different for the visual Ternus (3 lights, 162 ms) and the tactile Ternus (3 touches, 195 ms). The critical delay for the multimodal Ternus (3 light – touch pairs, 161 ms) was not different from the visual or tactile Ternus effects. In a second experiment, subjects were exposed to 2.5 min of visual group motion (stimulus onset asynchrony = 300 ms). The exposure caused a shift in the critical delay of the visual Ternus, a trend in the same direction for the multimodal Ternus, but no shift in the tactile Ternus. These results suggest separate but similar grouping rules for visual, tactile, and multimodal stimuli.
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Yousefi Nooraie, Reza, Bronwyn Thompson, Chelsea D’Silva, Ian Zenlea, Maryam Tabatabaee, and Ardavan Mohammad Aghaei. "A fused mixed-methods approach to thematic analysis of personal networks: Two case studies of caregiver support networks." Network Science 9, no. 2 (May 4, 2021): 236–53. http://dx.doi.org/10.1017/nws.2021.4.
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AbstractThematic analysis of personal networks involves identifying regularities in network structure and content, and grouping networks into types/clusters, to allow for a holistic understanding of social complexities. We propose an inductive approach to network thematic analysis, applying the learnings from qualitative coding, fused mixed-methods analysis, and typology development. It involves framing (changing focus by magnifying, aggregating, and graphical configuration), pattern detection (identification of underlying dimensions, sorting, and clustering), labeling, and triangulating (confirmation and fine-tuning using quantitative and qualitative approaches); applied repeatedly and emergently. We describe this approach utilized in two cases of studying support networks of caregivers.
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Sceulovs, Deniss, Vladimir Shatrevich, and Elina Gaile-Sarkane. "Development of Different SMEs Growing Stages Using Configurational Theory." GATR Global Journal of Business Social Sciences Review 4, no. 4 (October 11, 2016): 20–28. http://dx.doi.org/10.35609/gjbssr.2016.4.4(4).
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Objective The purpose of article is to study the factors that positively influenced the development of enterprises, named as "success factors", creating model of success factors that affect entrepreneurial process. The article investigates configuration during the process of company growth. Methodology/Technique The theoretical and methodological groundwork of the study is formed of scientific articles, monographs, regulatory enactments and researches, conference materials, internet resources, expert opinions published in Latvia and abroad. In the research generally accepted qualitative and quantitative data analysis methods of the economic science was employed, among them, statistical data processing, data grouping, and inductive-deductive data analysis methods. The scientific study employs surveying, observation study method, as well as comparative and analytical methods, which are used by the authors to compare and analyse facts and assess solutions to specific issues. Findings As start-ups grow, there are several factors that determine their successful operations. The empirical pre-research survey conducted by the authors allowed identifying several factors that affect a company's long-term development. According to analysis, the factors were divided into four groups. The factors determined by the authors of the article are mutually related and considered as a whole system according to configurational approach. Novelty : The authors point out that the factors described and grouped in this article will serve as the ground for further studies, during which the authors will perform factor classification. Type of Paper: Review Keywords: SMEs, Success Factors, Development of a Company, Growth, Stakeholders Values, Configuration.
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Kuc, Marta. "The use of taxonomy methods for clustering European Union countries due to the standard of living." Oeconomia Copernicana 3, no. 2 (June 30, 2012): 5–24. http://dx.doi.org/10.12775/oec.2012.006.
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This paper proposes the application of taxonomic tools to study the differentiation of standard of living in the European Union countries. The aggregate distance between given countries is the basis for grouping member states in terms of their internal structure of the studied characteristics. The analysis is based on two chosen methods–the Ward’s and k-means method. The study included 24 member states of the European Union in 1995-2010. Depending on the distance between the object, the countries were divided into two or four clusters. Similar configuration of each group obtained using both methods has led to the conclusion that these methods can be used both complementarily and separately.
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Amarendra Reddy, P., O. Ramesh, and . "Elite Sequence Mining of Big Data using Hadoop Mapreduce." International Journal of Engineering & Technology 7, no. 4.10 (October 2, 2018): 19. http://dx.doi.org/10.14419/ijet.v7i4.10.20696.
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Text mining can deal with unstructured information. The proposed work extricates content from a PDF report is changed over to plain content configuration; at that point record is tokenized and serialized. Record grouping and classification is finished by discovering similarities between reports put away in cloud. Comparable archives are distinguished utilizing Singular Value Decomposition (SVD) strategy in Latent Semantic Indexing (LSI). At that point comparative records are assembled together as a group. A similar report is done between LFS (Local File System) and HDFS (HADOOP DISTRIBUTED FILE SYSTEM) as for rate and dimensionality. The System has been assessed on genuine records and the outcomes are classified.
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Weldon, James. "Decorative Reading: Some Implications of Ordinatio in Piers Plowman." Florilegium 14, no. 1 (January 1996): 137–56. http://dx.doi.org/10.3138/flor.14.009.
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Critical analysis of Piers Plowman frequently rests on two assumptions — the theory of bipartition (the division of the poem into visio and vita) and the related theory of segmentation of the vita into the triad: dowel, dobet, and dobest. These theories have resulted in readings of the poem invariably quadripartite and triadic and, in my view, have obscured the dominant of Piers Plowman—the dream vision genre. Biparition and segmentation inevitably mask the B-text’s unique arrangement of a sequence of dream visions (each with its distinctive generic markers of prologue, vision, and epilogue) and cloud any structural grouping of those visions. The visio section, for example, combines dream visions one and two (B. Prol., Passus 1-7), and any structural configuration which extends beyond this theoretical boundary seems untenable — perhaps even unthinkable — given the critical tradition of the poem. That critical tradition, however, rests on past editorial decisions and involves to some extent the suppression and misrepresentation of manuscript evidence of disagreement with, challenge to, and uncertainty regarding bipartition and segmentation. Some manuscripts foster suggestions of an alternative grouping of dream visions within Piers Plowman, suggestions that emerge from the ordinatio.
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Umezurike, Samuel Augustine, and Olusola Ogunnubi. "Counting the Cost? A Cautionary Analysis of South Africa's BRICS Membership." Journal of Economics and Behavioral Studies 8, no. 5(J) (October 30, 2016): 211–21. http://dx.doi.org/10.22610/jebs.v8i5(j).1444.
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BRICS is a grouping of five major developing countries that includes Brazil, Russia, India, China and South Africa, all with the ambition of changing the governance architecture of international political-economy but with claims to speedy industrialization, fast growing economies and relatively strong regional and global influence. South Africa joined BRICS at the invitation of China in 2010 and has shown commitment to the group through friendly relations with other member countries. The country’s extensive economic links with China and the other BRICS states underpinned its strategy of diversifying its external trade especially with regard to looking away from West. This article employs content analysis to reflect on South Africa’s membership of BRICS, focusing specifically on the country’s relations with China. It argues that, while South Africa’s economic indicators do not fit well with the BRICS grouping, China is promoting this relationship in order to counter the West’s neo-imperialism and neo-liberal rhetoric. South Africa’s willingness to accept Chinese superiority in the African market and to act as a junior partner in the global power configuration makes the country the perfect choice for this project.
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Fedorova, Aleksandra, Viktar Beliautsou, and Armin Zimmermann. "Colored Petri Net Modelling and Evaluation of Drone Inspection Methods for Distribution Networks." Sensors 22, no. 9 (April 29, 2022): 3418. http://dx.doi.org/10.3390/s22093418.
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The UAV industry is developing rapidly and drones are increasingly used for monitoring industrial facilities. When designing such systems, operating companies have to find a system configuration of multiple drones that is near-optimal in terms of cost while achieving the required monitoring quality. Stochastic influences such as failures and maintenance have to be taken into account. Model-based systems engineering supplies tools and methods to solve such problems. This paper presents a method to model and evaluate such UAV systems with coloured Petri nets. It supports a modular view on typical setup elements and different types of UAVs and is based on UAV application standards. The model can be easily adapted to the most popular flight tasks and allows for estimating the monitoring frequency and determining the most appropriate grouping and configuration of UAVs, monitoring schemes, air time and maintenance periods. An important advantage is the ability to consider drone maintenance processes. Thus, the methodology will be useful in the conceptual design phase of UAVs, in monitoring planning, and in the selection of UAVs for specific monitoring tasks.
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Włoch, Wiesław, and Stanisław Wawrzyniak. "The configuration of events and cell growth activity in the storeyed cambium of the linden (Tilia cordata Mill.)." Acta Societatis Botanicorum Poloniae 59, no. 1-4 (2014): 25–43. http://dx.doi.org/10.5586/asbp.1990.003.
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A sample of wood from the trunk of the studied linden showed a periodic change in the orientation of the grain, occurring in an approximately two-year cycle. These changes in the grain were accompanied by cyclic changes in the configuration of events in the rays, that is, in the splitting and uniting of rays in the cambium. Intrusive growth on the lateral, radial edges near the ends of fusiform cells caused the translocation of cells on the storey borders, resulting in the splitting and uniting of rays. The growth activity of fusiform cells was determined on the basis of analysis of events in the rays through comparison of successive layers of the terminal parenchyma of the wood. Grouping of the ends of intrusively growing cells occurred here. The distribution of growth activity on the surface of the cambium was not uniform. It was possible to identify areas of cambium significantly differing from each other in respect to the duration of their growth activity. This period did not coincide with the duration of the cycle of changes in the configuration of events.
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García-Cervigón, Ana I., Alex Fajardo, Cristina Caetano-Sánchez, J. Julio Camarero, and José Miguel Olano. "Xylem anatomy needs to change, so that conductivity can stay the same: xylem adjustments across elevation and latitude in Nothofagus pumilio." Annals of Botany 125, no. 7 (March 16, 2020): 1101–12. http://dx.doi.org/10.1093/aob/mcaa042.
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Abstract Background and Aims Plants have the potential to adjust the configuration of their hydraulic system to maintain its function across spatial and temporal gradients. Species with wide environmental niches provide an ideal framework to assess intraspecific xylem adjustments to contrasting climates. We aimed to assess how xylem structure in the widespread species Nothofagus pumilio varies across combined gradients of temperature and moisture, and to what extent within-individual variation contributes to population responses across environmental gradients. Methods We characterized xylem configuration in branches of N. pumilio trees at five sites across an 18° latitudinal gradient in the Chilean Andes, sampling at four elevations per site. We measured vessel area, vessel density and the degree of vessel grouping. We also obtained vessel diameter distributions and estimated the xylem-specific hydraulic conductivity. Xylem traits were studied in the last five growth rings to account for within-individual variation. Key Results Xylem traits responded to changes in temperature and moisture, but also to their combination. Reductions in vessel diameter and increases in vessel density suggested increased safety levels with lower temperatures at higher elevation. Vessel grouping also increased under cold and dry conditions, but changes in vessel diameter distributions across the elevational gradient were site-specific. Interestingly, the estimated xylem-specific hydraulic conductivity remained constant across elevation and latitude, and an overwhelming proportion of the variance of xylem traits was due to within-individual responses to year-to-year climatic fluctuations, rather than to site conditions. Conclusions Despite conspicuous adjustments, xylem traits were coordinated to maintain a constant hydraulic function under a wide range of conditions. This, combined with the within-individual capacity for responding to year-to-year climatic variations, may have the potential to increase forest resilience against future environmental changes.
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Hung, Yi-Feng, Chi-Chung Wang, and Gen-Han Wu. "Scheduling Semiconductor Multihead Testers Using Metaheuristic Techniques Embedded with Lot-Specific and Configuration-Specific Information." Mathematical Problems in Engineering 2013 (2013): 1–14. http://dx.doi.org/10.1155/2013/436701.
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In the semiconductor back-end manufacturing, the device test central processing unit (CPU) is most costly and is typically the bottleneck machine at the test plant. A multihead tester contains a CPU and several test heads, each of which can be connected to a handler that processes one lot of the same device. The residence time of a lot is closely related to the product mix on test heads, which increases the complexity of this problem. It is critical for the test scheduling problem to reduce CPU's idle time and to increase tester utilization. In this paper, a multihead tester scheduling problem is formulated as an identical parallel machine scheduling problem with the objective of minimizing makespan. A heuristic grouping method is developed to obtain a good initial solution in a short time. Three metaheuristic techniques, using lot-specific and configuration-specific information, are proposed to receive a near-optimum and are compared to traditional approaches. Computational experiments show that a tabu search with lot-specific information outperforms all other competing approaches.
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Kumar, Ankit, and Bumshik Lee. "An Analytic Transform Kernel Derivation Method for Video Codecs." Applied Sciences 11, no. 19 (October 6, 2021): 9280. http://dx.doi.org/10.3390/app11199280.
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In the standardization of versatile video coding (VVC), discrete cosine transform (DCT)-2, discrete sine transform (DST)-7, and DCT-8 are regarded as the primary transform kernels. However, DST-4 and DCT-4 can also be considered as the transform kernels instead of using DST-7 and DCT-8 owing to their effectiveness in smaller resolution test sequences. To implement these different block size transform kernels, a considerable amount of memory has to be allocated. Moreover, memory consumption to store different block size transform kernels is regarded as a major issue in video coding standardization. To address this problem, a common sparse unified matrix concept is introduced in this study, where any block size transform kernel matrix can be obtained after some mathematical operations. The proposed common sparse unified matrix saves approximately 80% of the static memory by storing only a few transform kernel elements for DCT-2, DST-7, and DCT-8. Full-required transform kernels are derived using the stored transform kernels and generated unit-element matrices and a permutation matrix. The static memory required is only for 1648 elements instead of 8180 elements, each with 8-bit precision. The defined common sparse unified matrix is composed of two parts: a unified DST-3 matrix and a grouped DST-7 matrix. The unified DST-3 matrix is used to derive different points of DCT-2 transform kernels, and the grouped DST-7 matrix is used to derive different points of DST-7 and DCT-8 transform kernels. The new technique of grouping concept is introduced, which shows the relationship between different rows of DST-7 transform kernels with various block sizes. The proposed grouping concept supports the fast algorithm of DST-7 by implementing the proposed method of the “one group one feature” principle. The simulation was conducted using the VTM-3.0 reference software under common test conditions. The simulation result of the all intra (AI) configuration is Y = 0.00%, U = −0.02%, V = 0.00% with an encoding time of 100%, and a decoding time of 100%. Similarly, the simulation results of random access (RA) configuration are Y = −0.01%, U = 0.09%, V = 0.06%, and the encoding and decoding times are 101% and 100%, respectively. The simulation result of the low delay B (LDB) configuration is Y = 0.01%, U = 0.08%, and V = −0.27%, for encoding and decoding times of 101% and 100%, respectively.
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Sikk, Kaarel, and Geoffrey Caruso. "A spatially explicit agent-based model of central place foraging theory and its explanatory power for hunter-gatherers settlement patterns formation processes." Adaptive Behavior 28, no. 5 (June 12, 2020): 377–97. http://dx.doi.org/10.1177/1059712320922915.
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The behavioural ecological approach to anthropology states that the density and distribution of resources determines optimal patterns of resource use and also sets its constraints to grouping, mobility and settlement choice. Central place foraging (CPF) models have been used for analyzing foraging behaviours of hunter-gatherers and drawing a causal link from the volume of available resources in the environment to the mobility decisions of hunter-gatherers. In this study, we propose a spatially explicit agent-based CPF model. We explore its potential for explaining the formation of settlement patterns and test its robustness to the configuration of space. Building on a model assuming homogeneous energy distributions, we had to add several new parameters and an adaptation mechanism for foragers to predict the length of their stay, together with a heterogeneous environment configuration. The validation of the model shows that the spatially explicit CPF is generally robust to spatial configuration of energy resources. The total volume of energy has a significant effect on constraining sedentism as predicted by aspatial model and thus can be used on different environmental conditions. Still the spatial autocorrelation of resource distribution has a linear effect on optimal mobility decisions and needs to be considered in predictive models. The effect on settlement location choice is not substantial and is more determined by other characteristics of settlement location. This limits the CPF models in analyzing settlement pattern formation processes.
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Mitkovic, Milan, Milorad Mitkovic, Marko Bumbasirevic, and Marija Mitkovic. "Influence of pins configuration to balance of general transversal stability in long bone fractures external fixation." Acta chirurgica Iugoslavica 57, no. 4 (2010): 109–13. http://dx.doi.org/10.2298/aci1004109m.
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Biomechanical features of long bones indicate that external fixation of long bone fractures have to be balanced according to general transversal stability as more as possible. The aim of this work was to investigate the influence of orientation pins to the general transversal stability of external fixation of fractures of long bones. In this study we have used the model of fractured long bone made of wood which was treated by Mitkovic external fixator with 4 pins, in 3 different situations: 1. all pins are in one axial plane, 2. each 2 pins are in 2 axial planes with angle distances of 60o, 3. each 2 pins are in 2 axial planes wich are normal to each other. Means of relations of measured movements of long bone model fragments during the use of perpendicular force from 2 directions, normal to each other, after grouping of results in 3 groups: 0,17, 0,46 i 0,72. Statistical analyses showed that the differences between each of 3 groups were significant (p<0,05). It can be concluded that it is better if pins are oriented in different axial planes, with pretension that both planes are normal to each other, during external fixation of long bone fractures.
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Suzuki, Toshiaki, Hiroyuki Kubo, Hayato Hoshihara, and Taro Ogawa. "Packet Transport Network Recovery System with Examination of Data Transmission Quality." International Journal of Reliability, Quality and Safety Engineering 27, no. 03 (September 18, 2019): 2050007. http://dx.doi.org/10.1142/s0218539320500072.
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A packet transport network recovery system based on failure pattern under examination of transmission quality is proposed. Network failures are segmented into one of the three patterns: single failure of a node, failures of multiple nodes, and failures of multiple network areas. The single failure is recovered by a protection scheme. For failures of multiple nodes or multiple areas, recovery is performed by a node-based multiple-backup operation plane scheme or by an area-based multiple-back operation plane scheme, respectively. A unique recovery ID is assigned to each failure pattern and backup paths with the recovery ID are stored in each node. When network failures occur, the network management server determines the type of failure and sends the appropriate recovery ID to the nodes. Then recovery paths are configured. Our proposed system took about 0.5[Formula: see text]s to configure 1000 backup paths after failures were detected, compared to about 4[Formula: see text]s by a conventional scheme. For the examination of data transmission quality, multiple paths that do not share the same link are grouped and configured concurrently. The number of groups is regarded as the performance of the configuration. The performance of the proposed system is about three times faster than a configuration without grouping.
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Erickson, R. P., J. L. Rodgers, and W. S. Sarle. "Statistical analysis of neural organization." Journal of Neurophysiology 70, no. 6 (December 1, 1993): 2289–300. http://dx.doi.org/10.1152/jn.1993.70.6.2289.
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1. The responses of 32 taste neurons in the solitary nucleus of the rat to 12 stimuli were analyzed with multidimensional scaling (MDS) and cluster analysis (CA) procedures. These analyses of empirical taste data were compared with similar analyses of two model data sets of known configuration to help clarify the implications of these methods commonly used in forming conclusions about the organization of the taste system. 2. To relate to possible conclusions about groupings in taste, both model data sets were chosen as the best possible examples of ungrouped data, the first being completely regular (in the form of a checkerboard) across the taste space, the second randomly arranged. The analysis of the present empirical data appear to be similar to the present ungrouped models, more so the random than the regular model, in the sense that all are amenable to grouping. 3. Because of the similarity of these model MDS and CA solutions to the present empirical solutions and to most published analyses of this sort, the idea is suggested that the appearance of the plots per se for empirical data does not support the conclusion of grouping. And, technically, MDS and CA do not have the statistical power to provide conclusions about issues of neural organization. 4. MDS and CA analyses have two very powerful roles relating to their ability to disclose the hidden organization of complex data sets; they may lend support for or refute theories about the data sets developed from other considerations, and may help generate theories for further consideration. The question of groupings is only one of many such issues. 5. Because data in the present and other reports are quite adequately accounted by MDS solutions of low dimensionality, it is suggested that their organization is characterized as continuous (i.e., rather than belonging to several disjoint spaces). 6. The use of correlations as distance measures in MDS and CA procedures distorts the spatial solutions, making analysis by visual inspection misleading. For example, using correlations, the true or natural spatial arrangements of data sets are probably less circular or spherical than shown in published MDS solutions. Also they are probably more evenly distributed across the space in the sense that the points are actually more concentrated toward the centers of the spaces; this may have strong influences on interpretations of the general form of the solutions. CA solutions can be influenced in analogous fashion. These problems of distortion of the solutions can be avoided with use of direct, linear estimates of distances. (ABSTRACT TRUNCATED AT 400 WORDS)
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Shinjo, J., J. Xia, L. C. Ganippa, and A. Megaritis. "Puffing-enhanced fuel/air mixing of an evaporating -decane/ethanol emulsion droplet and a droplet group under convective heating." Journal of Fluid Mechanics 793 (March 18, 2016): 444–76. http://dx.doi.org/10.1017/jfm.2016.130.
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Puffing of a decane/ethanol emulsion droplet and a droplet group under convective heating and its effects on fuel/air mixing are investigated by direct numerical simulation that resolves all of the liquid/gas and liquid/liquid interfaces. With distinct differences in the boiling point between decane and ethanol, the embedded ethanol sub-droplets can be superheated and boil explosively. Puffing, i.e. ejection of ethanol vapour, occurs from inside the parent decane droplet, causing secondary breakup of the droplet. The ejected ethanol vapour mixes with the outer gas mixture composed of air and vapour of the primary fuel decane, and its effects on fuel/air mixing can be characterised by the scalar dissipation rates (SDRs). For the primary-fuel SDR, the cross-scalar diffusion due to ethanol vapour puffing plays a dominant role in enhancing the micromixing. When the vapour ejection direction is inclined towards the wake direction, the wake is elongated, but the shape of the stoichiometric mixture fraction isosurface is not changed much, indicating a limited effect on droplet grouping in a spray. On the other hand, when the ejection direction is inclined towards the transverse direction, the stoichiometric surface is pushed further away in the transverse direction, and its topology is changed by the puffing. The trajectories of ejected ethanol vapour pockets can be predicted by the correlation obtained for a jet in cross-flow, and the vapour pockets may reach a few diameters away from the droplet. Therefore, in a multiple-droplet configuration, the transverse ethanol vapour ejection due to puffing may transiently change the droplet grouping characteristics. In simulation cases with multiple droplets, the interaction changing the droplet grouping due to puffing has been confirmed, especially for droplets in the most upstream position in a spray. This implies that puffing should be accurately included in the mixing and combustion modelling of such a biofuel-blended diesel spray process.
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Sánchez-Martín, José-Manuel, Juan-Ignacio Rengifo-Gallego, and Rocío Blas-Morato. "Hot Spot Analysis versus Cluster and Outlier Analysis: An Enquiry into the Grouping of Rural Accommodation in Extremadura (Spain)." ISPRS International Journal of Geo-Information 8, no. 4 (April 4, 2019): 176. http://dx.doi.org/10.3390/ijgi8040176.
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The importance of the distribution of accommodation businesses over a certain area has grown remarkably, especially if such distribution is mapped using tools and techniques that utilize the territory as a variable in the analysis. The purpose of this paper is to demonstrate, by means of a geographical information system (GIS) and spatial statistics, that it is possible to better define the groupings of rural accommodation available in Extremadura, Spain, especially if these are conceptualized by dint of their lodging capacity. To do so, two specific techniques have been used: hotspot analysis and outlier analysis, which yield results that prove the existence of homogeneous and heterogeneous groups of accommodation businesses, based not only on their spatial proximity but also on their lodging capacity. On the basis of this analysis, the regional administration can devise tourist policies and strategic plans in order to improve the management and efficiency of each business. Despite the applicability of the present results, this study also addresses the difficulties in using these techniques—Where establishing the spatial relationships and the boundary distance are key concepts. In the case study here, the ideal configuration utilizes a fixed distance of six miles.
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Raja, Jawwad Z., Mehmet Chakkol, Mark Johnson, and Ahmad Beltagui. "Organizing for servitization: examining front- and back-end design configurations." International Journal of Operations & Production Management 38, no. 1 (January 2, 2018): 249–71. http://dx.doi.org/10.1108/ijopm-03-2016-0139.
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Purpose Research suggests that to structure for servitization, organizations should separate their front- and back-end units by reference to high vs low contact activities. However, these prescriptions are overly simplistic and largely based on anecdotal evidence that fails to account for context. The purpose of this paper is to explore the design decisions taken by organizations in support of servitization. Design/methodology/approach A large-scale exploratory case study was conducted, consisting of embedded cases in three divisions of a UK-based, global manufacturing firm. Findings Each division provided different combinations of offerings (i.e. product-, use- and result-oriented). The findings suggest that front-end/back-end configurations differ according to the offering and can exist concurrently within the same organization, challenging the assumption that different configurations within an organization are not possible. The findings show that underlying contextual factors, such as the complexity and temporality of the offering, as well as the power of the customer, have implications for the structuring of servitizing organizations. Research limitations/implications This is a context-specific, qualitative case study conducted within a large original equipment manufacturer, yet the findings are analytically generalized. Originality/value In identifying the relevance of different design decisions in terms of customer contact, decoupling of activities and grouping of employees, the findings challenge the extant view that organizations simply split activities between the front- and back-end functions. The research identifies an additional design configuration – integrated project teams – involving a dominant customer dictating organizational interfaces. This research exposes the need for further investigation into how to organize for servitization in project-based contexts.
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Wilson, Antony Deol. "Detection and Classification of Plant Diseases by Image Processing." International Journal for Research in Applied Science and Engineering Technology 9, no. VIII (August 15, 2021): 789–93. http://dx.doi.org/10.22214/ijraset.2021.37482.
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The point of this undertaking is to configuration, carry out and assess a picture handling programming based answer for programmed recognition and grouping of plant leaf infection. Anyway contemplates show that depending on unadulterated unaided eye perception of specialists to recognize and group infections can be tedious and costly, particularly in country regions and agricultural nations. So we present quick, programmed, modest and precise picture preparing based arrangement. Arrangement is made out of four primary stages; in the main stage we make a shading change structure for the RGB leaf picture and afterward, we apply shading space change for the shading change structure. Then, in the subsequent stage, the pictures are sectioned utilizing the K-implies bunching strategy. In the third stage, we figure the surface components for the portioned contaminated items. At long last, in the fourth stage the separated provisions are gone through a pre-prepared neural organization.
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Baqaruzi, Syamsyarief, Afit Afit Miranto, and Dede Wahyuda. "The Effect of Halbach Array Configuration on Permanent-Magnet Synchronous Generator (PMSG) Outer-Runner." International Journal of Engineering, Science and Information Technology 1, no. 2 (March 29, 2021): 16–23. http://dx.doi.org/10.52088/ijesty.v1i2.50.
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Permanent-Magnet Synchronous Generator it can provide highly reliable power generation with small in size, no copper losses in the rotor circuit, no need for external excitation. We designed and simulated the PMSG with 12 slots and 8 poles with an alternating polarity magnet configuration: NN-SS-NN-SS-NN-SS-NN-SS-NN-SS-NN magnetic flux per pole in the outer stator and the inner stator has been assumed to be constant, following sizes and materials described in this paper. The generator's number of poles is determined by stacking several sections of the magnet side by side and grouping opposite poles in a continuous pattern. the initial design of the PMSG 12 slots and 8 poles outer-runner compare to see how the halbach array configuration changes the output parameter, it will be included. Proportional to the load size and speed The larger the magnetic flux generated by the movement of the magnetic field, the higher the rpm, and the heavier the coil magnetic flux obtained, the higher the induced voltage. This research use five speed variations varying from 1000 to 5000 rpm and load variation from 5 ohm, 15 ohm, 30 ohm, 60 ohm, and 100 ohm. With the effect that the flux distribution is voltage generated at a 5 ohm load only increases at 1000 rpm, while the increase in torque produces an increase in the amount of input power at 30 ohm, which is equal to both the speed and the amount of torque, where the input power increases at all speeds at a load of 30 ohm. This also arises when the output power generated at a load of 30 ohm increases by a high efficiency of over 86%.
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Collins, Nancy, Isabel Margarita Coronado González, and Bruno Victor Alfons Govaerts. "Oecanthus mhatreae sp. nov. (Gryllidae: Oecanthinae): A new species of tree cricket from Mexico, with an irregular song pattern and unique chirp-like trill configuration." Journal of Orthoptera Research 28, no. 2 (August 28, 2019): 137–43. http://dx.doi.org/10.3897/issn2541-8416.2019.19.2.75.
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A new species of Oecanthus is described from Mexico. Oecanthus mhatreaesp. nov. occurs in central Mexico in the understory of tropical deciduous forest. Oecanthus mhatreaesp. nov. is currently known only from the Corregidora area of the Mexican state of Querétaro. The widened tegmina and chirp-like brief trills song are consistent with some members of the rileyi species group; however, this new species of tree cricket is different in several aspects. The chirp-like brief trills are generally irregularly spaced, it does not have the expected grouping of the chirp pulses, and the colors of buff, light olive green, or light brown are vastly different than the four known pale green species in the rileyi species group of the Western Hemisphere. Morphology, habitat, and song details of this new species, with the common name of Otomi tree cricket, are provided in this paper. Video can be viewed at www.oecanthinae.com.
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Collins, Nancy, Isabel Margarita Coronado González, and Bruno Victor Alfons Govaerts. "Oecanthus mhatreae sp. nov. (Gryllidae: Oecanthinae): A new species of tree cricket from Mexico, with an irregular song pattern and unique chirp-like trill configuration." Journal of Orthoptera Research 28, no. 2 (August 28, 2019): 137–43. http://dx.doi.org/10.3897/jor.28.33781.
Full textAbstract:
A new species of Oecanthus is described from Mexico. Oecanthus mhatreaesp. nov. occurs in central Mexico in the understory of tropical deciduous forest. Oecanthus mhatreaesp. nov. is currently known only from the Corregidora area of the Mexican state of Querétaro. The widened tegmina and chirp-like brief trills song are consistent with some members of the rileyi species group; however, this new species of tree cricket is different in several aspects. The chirp-like brief trills are generally irregularly spaced, it does not have the expected grouping of the chirp pulses, and the colors of buff, light olive green, or light brown are vastly different than the four known pale green species in the rileyi species group of the Western Hemisphere. Morphology, habitat, and song details of this new species, with the common name of Otomi tree cricket, are provided in this paper. Video can be viewed at www.oecanthinae.com.
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Morales, Félix, Miguel García-Torres, Gustavo Velázquez, Federico Daumas-Ladouce, Pedro E. Gardel-Sotomayor, Francisco Gómez-Vela, Federico Divina, et al. "Analysis of Electric Energy Consumption Profiles Using a Machine Learning Approach: A Paraguayan Case Study." Electronics 11, no. 2 (January 14, 2022): 267. http://dx.doi.org/10.3390/electronics11020267.
Full textAbstract:
Correctly defining and grouping electrical feeders is of great importance for electrical system operators. In this paper, we compare two different clustering techniques, K-means and hierarchical agglomerative clustering, applied to real data from the east region of Paraguay. The raw data were pre-processed, resulting in four data sets, namely, (i) a weekly feeder demand, (ii) a monthly feeder demand, (iii) a statistical feature set extracted from the original data and (iv) a seasonal and daily consumption feature set obtained considering the characteristics of the Paraguayan load curve. Considering the four data sets, two clustering algorithms, two distance metrics and five linkage criteria a total of 36 models with the Silhouette, Davies–Bouldin and Calinski–Harabasz index scores was assessed. The K-means algorithms with the seasonal feature data sets showed the best performance considering the Silhouette, Calinski–Harabasz and Davies–Bouldin validation index scores with a configuration of six clusters.
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Grein, Friedrich. "Theoretical studies on ClOO — electronic spectra, ionization potential, and electron affinity." Canadian Journal of Physics 89, no. 8 (August 2011): 891–97. http://dx.doi.org/10.1139/p11-076.
Full textAbstract:
Vertical excitation energies and oscillator strengths of doublet and quartet states of ClOO, covering doublet states up to 7.5 eV and quartet states up to 9 eV, were obtained by multireference configuration interaction calculations. Strong absorptions from the X2A″ ground state are predicted at 186 and 235 nm. Experimentally, a maximum has been found near 248 nm. The grouping of excited states, with twelve low-lying doublet states and three low-lying quartet states, is explained by the interaction of the 2P ground state of Cl with the π*2 states 3Σg–, 1Δg, and 1Σg+ of O2. Potential energy curves for Cl–O separation at fixed O–O distance and ClOO angle show the lower states to be repulsive (with the exception of the ground state), and higher states to have minima due to avoided crossings. The lowest Rydberg states are expected around 8.5 eV. Adiabatic ionization potentials (IP) and electron affinities (EA) of ClOO were obtained by density functional and coupled cluster methods, with values of 11.60–11.79 eV for IP and 3.56–3.79 eV for EA.