Journal articles on the topic 'Quartet based method'
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Yang, Jialiang, Stefan Grünewald, and Xiu-Feng Wan. "Quartet-Net: A Quartet-Based Method to Reconstruct Phylogenetic Networks." Molecular Biology and Evolution 30, no. 5 (April 12, 2013): 1206–17. http://dx.doi.org/10.1093/molbev/mst040.
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HU, MICHAEL, PAUL KEARNEY, and JONATHAN BADGER. "A COLLAPSING METHOD FOR THE EFFICIENT RECOVERY OF OPTIMAL EDGES IN PHYLOGENETIC TREES." International Journal on Artificial Intelligence Tools 14, no. 05 (October 2005): 717–31. http://dx.doi.org/10.1142/s0218213005002351.
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As the amount of sequencing efforts and genomic data volume continue to increase at an accelerated rate, phylogenetic analysis provides an evolutionary context for understanding and interpreting this growing set of complex data. We introduce a novel quartet based method for inferring molecular based phylogeny called hypercleaning* (HC*). The HC* method is based on the hypercleaning (HC) technique,2 which possesses an interesting property of recovering edges (of a phylogenetic tree) that are best supported by the witness quartet set. HC* extends HC in two regards: (i) whereas HC constrains the input quartet set to be unweighted (binary valued), HC* allows any positive valued quartet scores, enabling more informative quartets to be defined. (ii) HC* employs a novel collapsing technique which significantly speeds up the inference stage, making it empirically on par with quartet puzzling in terms of speed, while still guaranteeing optimal edge recovery as in HC. This paper is primarily aimed at presenting the algorithmic construction of HC*. We also report some preliminary studies on an implementation of HC* as a potentially powerful approximation scheme for maximum likelihood based inference. Details of proofs can be found in report at: ().
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Zhang, Chao, Celine Scornavacca, Erin K. Molloy, and Siavash Mirarab. "ASTRAL-Pro: Quartet-Based Species-Tree Inference despite Paralogy." Molecular Biology and Evolution 37, no. 11 (September 4, 2020): 3292–307. http://dx.doi.org/10.1093/molbev/msaa139.
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Abstract Phylogenetic inference from genome-wide data (phylogenomics) has revolutionized the study of evolution because it enables accounting for discordance among evolutionary histories across the genome. To this end, summary methods have been developed to allow accurate and scalable inference of species trees from gene trees. However, most of these methods, including the widely used ASTRAL, can only handle single-copy gene trees and do not attempt to model gene duplication and gene loss. As a result, most phylogenomic studies have focused on single-copy genes and have discarded large parts of the data. Here, we first propose a measure of quartet similarity between single-copy and multicopy trees that accounts for orthology and paralogy. We then introduce a method called ASTRAL-Pro (ASTRAL for PaRalogs and Orthologs) to find the species tree that optimizes our quartet similarity measure using dynamic programing. By studying its performance on an extensive collection of simulated data sets and on real data sets, we show that ASTRAL-Pro is more accurate than alternative methods.
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Consoli, Sergio, and Nikolaos I. Stilianakis. "A quartet method based on variable neighborhood search for biomedical literature extraction and clustering." International Transactions in Operational Research 24, no. 3 (December 14, 2015): 537–58. http://dx.doi.org/10.1111/itor.12240.
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Sardaru, Monica-Cornelia, Irina Rosca, Simona Morariu, Elena-Laura Ursu, Razvan Ghiarasim, and Alexandru Rotaru. "Injectable Thixotropic β–Cyclodextrin–Functionalized Hydrogels Based on Guanosine Quartet Assembly." International Journal of Molecular Sciences 22, no. 17 (August 25, 2021): 9179. http://dx.doi.org/10.3390/ijms22179179.
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Facile method for the preparation of β–cyclodextrin–functionalized hydrogels based on guanosine quartet assembly was described. A series of seven hydrogels were prepared by linking β–cyclodextrin molecules with guanosine moieties in different ratios through benzene–1,4–diboronic acid linker in the presence of potassium hydroxide. The potassium ions acted as a reticulation agent by forming guanosine quartets, leading to the formation of self–sustained transparent hydrogels. The ratios of the β–cyclodextrin and guanosine components have a significant effect on the internal structuration of the components and, correspondingly, on the mechanical properties of the final gels, offering a tunablity of the system by varying the components ratio. The insights into the hydrogels’ structuration were achieved by circular dichroism, scanning electron microscopy, atomic force microscopy, and X–ray diffraction. Rheological measurements revealed self–healing and thixotropic properties of all the investigated samples, which, in combination with available cyclodextrin cavities for active components loading, make them remarkable candidates for specific applications in biomedical and pharmaceutical fields. Moreover, all the prepared samples displayed selective antimicrobial properties against S. aureus in planktonic and biofilm phase, the activity also depending on the guanosine and cyclodextrin ratio within the hydrogel structure.
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Astahov, V. A. "STRING QUARTET BY MAURICE RAVEL IN THE CONTEXT OF CREATIVITY AND OUTLOOK OF THE COMPOSER." EurasianUnionScientists 6, no. 7(76) (August 20, 2020): 4–6. http://dx.doi.org/10.31618/esu.2413-9335.2020.6.76.933.
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In the article, the author reveals the specifics of the artistic and aesthetic views of the outstanding French composer based on the study of the musical text of M. Ravel's chamber-instrumental composition and musicological literature. The authors substantiate the idea of the significance of literary sources for the formation of Ravel's compositional style. Using the analytical method, the author identifies the compositional, dramatic, melodic, textural and Lado-harmonic features of the Ravel string Quartet (1903). The use of the comparative analysis method allowed us to determine the similarity and difference of the approaches Of M. Ravel and C. Debussy in the interpretation of the string Quartet genre. Consideration of the string Quartet in the context Of M. Ravel's work allowed the author to clarify certain aspects of the composer's creative method, to Supplement the ideas about his aesthetic and ideological principles.
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Springer, Mark S., Erin K. Molloy, Daniel B. Sloan, Mark P. Simmons, and John Gatesy. "ILS-Aware Analysis of Low-Homoplasy Retroelement Insertions: Inference of Species Trees and Introgression Using Quartets." Journal of Heredity 111, no. 2 (December 14, 2019): 147–68. http://dx.doi.org/10.1093/jhered/esz076.
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Abstract DNA sequence alignments have provided the majority of data for inferring phylogenetic relationships with both concatenation and coalescent methods. However, DNA sequences are susceptible to extensive homoplasy, especially for deep divergences in the Tree of Life. Retroelement insertions have emerged as a powerful alternative to sequences for deciphering evolutionary relationships because these data are nearly homoplasy-free. In addition, retroelement insertions satisfy the “no intralocus-recombination” assumption of summary coalescent methods because they are singular events and better approximate neutrality relative to DNA loci commonly sampled in phylogenomic studies. Retroelements have traditionally been analyzed with parsimony, distance, and network methods. Here, we analyze retroelement data sets for vertebrate clades (Placentalia, Laurasiatheria, Balaenopteroidea, Palaeognathae) with 2 ILS-aware methods that operate by extracting, weighting, and then assembling unrooted quartets into a species tree. The first approach constructs a species tree from retroelement bipartitions with ASTRAL, and the second method is based on split-decomposition with parsimony. We also develop a Quartet-Asymmetry test to detect hybridization using retroelements. Both ILS-aware methods recovered the same species-tree topology for each data set. The ASTRAL species trees for Laurasiatheria have consecutive short branch lengths in the anomaly zone whereas Palaeognathae is outside of this zone. For the Balaenopteroidea data set, which includes rorquals (Balaenopteridae) and gray whale (Eschrichtiidae), both ILS-aware methods resolved balaeonopterids as paraphyletic. Application of the Quartet-Asymmetry test to this data set detected 19 different quartets of species for which historical introgression may be inferred. Evidence for introgression was not detected in the other data sets.
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Kolková, Andrea, and Aleksandr Ključnikov. "Demand forecasting: an alternative approach based on technical indicator Pbands." Oeconomia Copernicana 12, no. 4 (December 21, 2021): 1063–94. http://dx.doi.org/10.24136/oc.2021.035.
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Research background: Demand forecasting helps companies to anticipate purchases and plan the delivery or production. In order to face this complex problem, many statistical methods, artificial intelligence-based methods, and hybrid methods are currently being developed. However, all these methods have similar problematic issues, including the complexity, long computing time, and the need for high computing performance of the IT infrastructure.
Purpose of the article: This study aims to verify and evaluate the possibility of using Google Trends data for poetry book demand forecasting and compare the results of the application of the statistical methods, neural networks, and a hybrid model versus the alternative possibility of using technical analysis methods to achieve immediate and accessible forecasting. Specifically, it aims to verify the possibility of immediate demand forecasting based on an alternative approach using Pbands technical indicator for poetry books in the European Quartet countries.
Methods: The study performs the demand forecasting based on the technical analysis of the Google Trends data search in case of the keyword poetry in the European Quartet countries by several statistical methods, including the commonly used ETS statistical methods, ARIMA method, ARFIMA method, BATS method based on the combination of the Cox-Box transformation model and ARMA, artificial neural networks, the Theta model, a hybrid model, and an alternative approach of forecasting using Pbands indicator. The study uses MAPE and RMSE approaches to measure the accuracy.
Findings & value added: Although most currently available demand prediction models are either slow or complex, the entrepreneurial practice requires fast, simple, and accurate ones. The study results show that the alternative Pbands approach is easily applicable and can predict short-term demand changes. Due to its simplicity, the Pbands method is suitable and convenient to monitor short-term data describing the demand. Demand prediction methods based on technical indicators represent a new approach for demand forecasting. The application of these technical indicators could be a further forecasting models research direction. The future of theoretical research in forecasting should be devoted mainly to simplifying and speeding up. Creating an automated model based on primary data parameters and easily interpretable results is a challenge for further research.
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Yao, Shouguang, Luobin Duan, Kai Zhao, Jiangbang Zeng, Zheshu Ma, and Xinwang Jia. "Simulation of phase transition process in reconstructed porous medium based on lattice Boltzmann method." Thermal Science 23, no. 1 (2019): 169–77. http://dx.doi.org/10.2298/tsci160817007y.
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At the pore scale level, 2-D porous medium structures of porous media with different porosities (isotropic) and the same porosities (anisotropic) were constructed using quartet structure generation set. A random porous cavity was selected and combined with the lattice Boltzmann model to describe the gas-liquid phase transition process. Bubble generation, growth, mutual fusion, and collision as well as rebound process in porous media framework were investigated by simulating the phase transition phenomenon in porous media. Calculation results show that in three different heat loads, the maximum relative errors between the qualities of gas phase and liquid phase and theoretical solution of gas phase were 0.09%, 0.19%, and 0.32%, respectively, whereas the values for liquid phase were 0.11%, 0.38%, and 1.49%, respectively. Simulation results coincide with the theoretical solution perfectly, verifying the accuracy and feasibility of the model for random porous structures.
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Avni, Eliran, and Sagi Snir. "A New Quartet-Based Statistical Method for Comparing Sets of Gene Trees Is Developed Using a Generalized Hoeffding Inequality." Journal of Computational Biology 26, no. 1 (January 2019): 27–37. http://dx.doi.org/10.1089/cmb.2018.0129.
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Luo, Liang, Jiahong Jin, Wei Wei, and Jianchao Cai. "An analysis of fractal dimension and tortuosity based on 2D numerical reconstruction model of reservoir rocks." Interpretation 7, no. 4 (November 1, 2019): SJ1—SJ6. http://dx.doi.org/10.1190/int-2019-0033.1.
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The microstructure of reservoir rocks plays an important role in oil and gas accumulation and production. We examine a universal method to evaluate these properties of rocks, such as pore tortuosity, matrix porosity, and connectivity, and we respectively construct a 2D numerical reconstruction rock model with different microstructure parameters by the Monte Carlo method and the quartet structure generation set method. We further study the heterogeneity (characterized by fractal dimension and tortuosity) of the constructed image for reservoir rocks by the numerical and theoretical analysis and obtain the formulas for fractal dimension and tortuosity versus porosity. The simulation results show that the logarithmic relation is between the pore fractal dimension and porosity, and the relationship between tortuosity and porosity has the form of power. This process provided an important method to advance 2D reconstruction technology of reservoir rocks and effectively determine the relationship between microstructure and porosity.
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Martin, Jennifer A., Peter A. Mirau, Yaroslav Chushak, Jorge L. Chávez, Rajesh R. Naik, Joshua A. Hagen, and Nancy Kelley-Loughnane. "Single-Round Patterned DNA Library Microarray Aptamer Lead Identification." Journal of Analytical Methods in Chemistry 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/137489.
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A method for identifying an aptamer in a single round was developed using custom DNA microarrays containing computationally derived patterned libraries incorporating no information on the sequences of previously reported thrombin binding aptamers. The DNA library was specifically designed to increase the probability of binding by enhancing structural complexity in a sequence-space confined environment, much like generating lead compounds in a combinatorial drug screening library. The sequence demonstrating the highest fluorescence intensity upon target addition was confirmed to bind the target molecule thrombin with specificity by surface plasmon resonance, and a novel imino proton NMR/2D NOESY combination was used to screen the structure for G-quartet formation. We propose that the lack of G-quartet structure in microarray-derived aptamers may highlight differences in binding mechanisms between surface-immobilized and solution based strategies. This proof-of-principle study highlights the use of a computational driven methodology to create a DNA library rather than a SELEX based approach. This work is beneficial to the biosensor field where aptamers selected by solution based evolution have proven challenging to retain binding function when immobilized on a surface.
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Wang, Qing Xiang, Hong Mei Zhang, Hong Nian Cai, and Qun Bo Fan. "Modified Quartet Structure Generation Set Reconstruction of Finite Element Model for Co-Continuous Ceramic Composites." Applied Mechanics and Materials 782 (August 2015): 278–90. http://dx.doi.org/10.4028/www.scientific.net/amm.782.278.
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Co-continuous ceramic composites have a complicated topology structure which makes it much more difficult for finite element model reconstruction. In this paper, the two-dimensional co-continuous ceramic composites finite element model is reconstructed by a modified quartet structure generation set method which modified the generation parameters based on quartet structure generation set (QSGS) method, and a numerical simulation at high strain rate is accomplished. The content mainly contains: (1) The distribution features of metal phase and ceramic phase of real co-continuous ceramic composites SEM image is calculated by mathematical statistics to determine the parameters that control the reconstruction such as volume fraction, core distribution probability and directional growth probability; (2) Two phase volume fraction and 2-point correlation function of the reconstructed finite element model is calculated as the quality assessment parameters, which verify the reconstructed finite element model are in allowable error range compared with the real SEM image; (3) Numerical simulation at high strain rate is carried out using the reconstructed finite element model. The failure behavior of co-continuous ceramic composites at high strain rate is analyzed, validates the reconstructed finite element model meets the requirements of numerical calculation.
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Alvarez-González, Ernesto. "Modelo de estimación de pesos de árbol filogenético para un cuartet, aplicando conjugación de Hadamard." Tequio 4, no. 11 (January 27, 2021): 41–52. http://dx.doi.org/10.53331/teq.v4i11.2942.
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The subject on this paper is that part of algebraic phylogenetics which proposes a method to infere the expected values of three kinds of nucleotide substitutions on the branches of a phylogenetic tree that explains the ancestral relations among an associated set of lineages. A tool known as Hadamard conjugation is presented, which –because it connects both the probability distribution of the different substitution patterns on the leaves of the phylogenetic tree, and the complete set of expected values of substitutions on its branches– may indeed be a resource to phylogenetic reconstruction. Based on this, a likelihood function is built for a quartet associated with an alignment of four nucleotide sequences.
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Sun, Jiannan, Ke Yan, Yongsheng Zhu, and Jun Hong. "A High-Similarity Modeling Method for Low-Porosity Porous Material and Its Application in Bearing Cage Self-Lubrication Simulation." Materials 14, no. 18 (September 21, 2021): 5449. http://dx.doi.org/10.3390/ma14185449.
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The porous oil-containing cage achieves the storage, spillage, and suction of lubricating oil by its micro-pore structure, thus ensuring the self-lubricating performance of the bearing. Carrying out fast and accurate modeling of the cage microscopic pore structure is the key to the analysis of the self-lubricating mechanism of bearings. In response to the issues where current modeling methods of porous materials have a low similarity of pore distribution, morphology, structure, and size characteristics, and the transition of pore surfaces is sharp, this paper proposed a modeling method of a highly similar micro-pore structure based on the idea of median filtering, the quartet structure generation set (QSGS), and the slice method. By extracting and analyzing the pore characteristics of the porous model and comparing them with the experimental results of CT scanning, the advantages of the modeling method in terms of morphology and pore connectivity were verified. Finally, by carrying out simulation analysis of the centrifugal force of oil splashing and capillary oil absorption on the constructed model by combining the parameters of porous structures such as porosity and tortuosity, the advantages of the modeling method in the construction of the porous model and multi-physical field analysis were further verified.
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Wu, Chunrui, Tiechen Zhang, Jiale Fu, Xiaori Liu, and Boxiong Shen. "Random pore structure and REV scale flow analysis of engine particulate filter based on LBM." Open Physics 18, no. 1 (December 5, 2020): 881–96. http://dx.doi.org/10.1515/phys-2020-0208.
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Abstract In this article, lattice Boltzmann method (LBM) is used to simulate the multi-scale flow characteristics of the engine particulate filter at the pore scale and the representative elementary volume (REV) scale, respectively. Four kinds of random wall-pore structures are considered, which are circular random structure, square random structure, isotropic quartet structure generation set (QSGS), and anisotropic QSGS, with difference analysis done. In terms of the REV scale, the influence of different inlet flow velocities and wall permeabilities on the flow in single channel is analyzed. The result indicates that the internal seepage laws of random structures constructed in this article and single channel are in accordance with Darcy’s law. Circular random structure has better permeability than square random structure. Isotropic QSGS has better fluidity than anisotropic one. The flow in single channel is similar to Poiseuille flow. The flow lines in the channel are complicated and a large number of vortices appear at the ends of channel with high inlet flow rate. With the increase of inlet velocity, the static pressure in channel gradually increases along the axial direction as well as the seepage velocity. The temperature field in the channel becomes more uniform as the flow velocity increases, and the higher temperature distribution appears on the wall of the porous media.
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Yang, Qirong, Tiechen Zhang, Xiaori Liu, Bo Qin, Minghao Song, and Boxiong Shen. "The flow and heat transfer characteristics of DPF porous media with different structures based on LBM." Open Physics 20, no. 1 (January 1, 2022): 349–69. http://dx.doi.org/10.1515/phys-2021-0016.
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Abstract To study the flow and heat transfer characteristics of diesel particulate filter wall porous media, Lattice Boltzmann Method (LBM) is used to simulate and analyze different structures in this article. On studying the heat transfer and flow characteristics of regular structures such as parallel and staggered structures, it is proved that the distribution of porous media structure has an effect on the heat transfer and flow characteristics. The effects of different structure distributions on the flow and heat transfer characteristics are analyzed by studying the complex structures such as random structure and the structure of Quartet Structure Generation Set (QSGS). The influences of different fiber diameters on the parameters under the parallel arrangement, the staggered arrangement, and the random arrangement is considered. The flow and heat transfer characteristics of the QSGS structure and Sierpinski carpets structure are also considered. Under the same porosity, different fiber diameters have effect on dimensionless permeability coefficient, pressure gradient, and filtration efficiency. The different structures of porous media affect the temperature and pressure distribution. For the relatively complex structure, the flow resistance is greater. The increase in Re will reduce the temperature gradient, and with the increase in Re, the flow in the structure will be more uniform.
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Qin, Zhi, Tianrui Bai, and Linhua Liu. "Radiative association of atomic and ionic nitrogen." Monthly Notices of the Royal Astronomical Society 507, no. 2 (August 9, 2021): 2930–36. http://dx.doi.org/10.1093/mnras/stab2269.
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ABSTRACT Radiative association for the formation of molecular nitrogen cation ${\rm{N}}_2^ + $ during the collision of an N(4Su) atom and an N+(3Pg) ion is investigated. The corresponding cross-sections and rate coefficients are computed by the quantum mechanical method based on ab initio potential energy curves and transition dipole moments, which are obtained by the internally contracted multireference configuration interaction method with the Davidson correction and aug-cc-pCV5Z-DK basis set. A number of low-lying doublet, quartet, and sextet states correlating to the N(4Su) + N+(3Pg) dissociation limit are considered. Hence, we investigate a number of dipole-allowed transitions and determine their contributions to the radiative association. The results show that transitions originating in the f4Πu, D2Πg, ${{\rm{B}}^2}\Sigma _{\rm{u}}^ + $, ${{\rm{1}}^4}\Sigma _{\rm{g}}^{\rm{ + }}$, and ${{\rm{1}}^6}\Sigma _{\rm{u}}^{\rm{ + }}$states are the main contributors for the radiative association process. The calculated rate coefficients are valid for temperatures from 100 to 10 000 K and fitted to the analytical function suitable for astrochemical reaction applications.
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Du, Wei, Zhongbo Cao, Yan Wang, Ying Sun, Enrico Blanzieri, and Yanchun Liang. "Prokaryotic Phylogenies Inferred from Whole-Genome Sequence and Annotation Data." BioMed Research International 2013 (2013): 1–15. http://dx.doi.org/10.1155/2013/409062.
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Phylogenetic trees are used to represent the evolutionary relationship among various groups of species. In this paper, a novel method for inferring prokaryotic phylogenies using multiple genomic information is proposed. The method is called CGCPhy and based on the distance matrix of orthologous gene clusters between whole-genome pairs. CGCPhy comprises four main steps. First, orthologous genes are determined by sequence similarity, genomic function, and genomic structure information. Second, genes involving potential HGT events are eliminated, since such genes are considered to be the highly conserved genes across different species and the genes located on fragments with abnormal genome barcode. Third, we calculate the distance of the orthologous gene clusters between each genome pair in terms of the number of orthologous genes in conserved clusters. Finally, the neighbor-joining method is employed to construct phylogenetic trees across different species. CGCPhy has been examined on different datasets from 617 complete single-chromosome prokaryotic genomes and achieved applicative accuracies on different species sets in agreement with Bergey's taxonomy in quartet topologies. Simulation results show that CGCPhy achieves high average accuracy and has a low standard deviation on different datasets, so it has an applicative potential for phylogenetic analysis.
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Qi, Han-Bing, Dong-Hai Li, Wei Wei, Xin-Hao Hu, Dong Li, Guo-Zhong Wu, and Xiao-Yan Liu. "Lattice Boltzmann simulation of resistance coefficient of the oil and water migration in porous media." Thermal Science 22, Suppl. 2 (2018): 547–56. http://dx.doi.org/10.2298/tsci171011039q.
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The coefficients of oil and water transfer resistance in porous media are the basis of numerical study on the migration of contamination in the pipeline, soil cleaning, oilfield water flooding, and oilfield water treatment. Based on the quartet structure generation set, the porous media with random distribution are constructed. The lattice Boltzmann method is used to simulate the mesoscopic migration of oil and water in porous media. Then the distribution law of oil and water velocity and pressure in porous media is analyzed, and the fitting equations of oil and water resistance coefficients are obtained under different porosity. The results show that when the oil and water migrate in porous media, the viscous resistance coefficient is larger than the inertia resistance factor, and the viscosity resistance coefficient of water is obviously higher than that of oil, while the coefficient of inertia resistance of oil and water is nearly same.
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Burla, M. C., C. Giacovazzo, and G. Polidori. "A robust tangent procedure." Journal of Applied Crystallography 46, no. 6 (October 26, 2013): 1592–602. http://dx.doi.org/10.1107/s0021889813024709.
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Third-generation direct methods programs are based on a phasing algorithm (e.g.the tangent or the parameter shift method) and on dual space refinement techniques. The two spaces may be alternated during the phasing procedure or used in a sequential way: for example, first phase and after extend and refine. The tangent approach inSIR2011belongs to the second category: phases are first estimated by the tangent formula, then their extension and refinement is performed in direct spaceviaelectron density modification techniques. In this article a number of new algorithms are described, with the aim of improving theSIR2011tangent step and allowing more efficient phase extension and refinement. New criteria were chosen for defining the number of reflections to phase, for modifying the tangent weighting scheme, and for fixing the active use of the psi-0 triplets and of the quartet invariants. Each tangent trial may now be submitted to the RELAX procedure, a tool for moving to the correct position a well oriented but misplaced structural model. The resulting procedure shows surprising efficiency, testified by a wide set of applications. The experimental results have been compared with the tangent and VLD (vive la différence) approaches implemented inSIR2011.
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Zheng, Binshuang, Xiaoming Huang, Jingwen Ma, Zhengqiang Hong, Jiaying Chen, Runmin Zhao, and Shengze Zhu. "Evaluation on Distribution Characteristics of Pore Water Pressure within Saturated Pavement Structure Based on the Proposed Tire-Fluid-Pavement Coupling Model." Advances in Materials Science and Engineering 2022 (January 28, 2022): 1–12. http://dx.doi.org/10.1155/2022/5849418.
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To investigate the flow characteristics of pore water in asphalt pavement and the variation law of the pore water pressure under vehicle loading, a novel method based on BA network and quartet structure generation set method was proposed to reconstruct the three-dimensional (3D) pavement model with pores. The permeability coefficient and the gradation curve were adopted to evaluate the reliability and stability of the random growth pavement model. Then, the tire-fluid-pavement coupling model was established with FLUENT 3D based on the fluid Mie–Gruneisen state equation. According to the built fluid-solid coupling model, the pressure-velocity coupled finite volume algorithm was applied to study the distribution of the pore water pressure in asphalt pavement. Results show that the pore water pressure in asphalt pavement decays periodically with time under vehicle loading. For different types of asphalt pavement, the pore water pressure in open-graded friction course (OGFC) pavement is the smallest during the whole process. Moreover, the peak values of the pore water pressure decrease in the order of asphalt concrete (AC) pavement, stone mastic asphalt (SMA) pavement, and OGFC pavement. The maximum negative value of the pore water pressure is generally less than 0.3 times the maximum positive values. As for saturated pavement pores, the pore water pressure is hardly affected by the water film thickness. The positive peak value of the pore water pressure increases on an approximate parabolic curve as the vehicle speed improves gradually, while the negative one remains largely unchanged. The results are expected to help reduce tire hydroplaning risk and provide guidance for the selection of asphalt mixtures of drainage asphalt pavement.
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Sofyani, Achmad S. Pahroji, Abdul Kadir Husain, Salim Korompot, and Jumadi Mori Salam Tuasikal. "Games Kuartet Sebagai Media Bimbingan dan Konseling Untuk Meningkatkan Pemahaman Karakter Religius Siswa." Student Journal of Guidance and Counseling 1, no. 2 (April 25, 2022): 61–74. http://dx.doi.org/10.37411/sjgc.v1i2.1063.
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Rumusan masalah pada penelitian ini yakni bagaimana games kuartet sebagai media bimbingan dan konseling untuk meningkatkan pemahaman karakter religius siswa. Adapun penelitian ini bertujuan untuk menghasilkan games kuartet sebagai media bimbingan dan konseling untuk meningkatkan pemahaman karakter religius siswa sekolah dasar. Motode penelitian yang digunakan yakni Reserch and Development model Sugiyono yang menguraikan tahap-tahap dalam metode penelitian dan pengembangan sebanyak sepuluh tahap penelitian dan pengembangan, namun dalam penelitian ini, peneliti membatasi sampai pada tahap uji coba produk dengan tanpa mengurangi esensi dari penelitian tersebut. Untuk mengetahui kepraktisan dan kelayakan media, peneliti melakukan validasi kepada ahli media, ahli bahasa, dan ahli bimbingan dan konseling guna melihat kelayakan dan meminta masukan sebelum nanti diujicobakan ke siswa sekolah dasar.
Berdasarkan hasil uji coba produk pada siswa kelas tinggi (4-6) di Sekolah Dasar Negeri 12 Telaga Biru Kabupaten Gorontalo. Menyatakan produk yang dibuat layak untuk dijadikan media bimbingan dan konseling untuk meningkatkan pemahaman karakter religius siswa sekolah dasar.
The formulation of the problem in this study is how the quartet games as a medium of guidance and counseling to improve the understanding of students' religious character. This study aims to produce quartet games as a medium of guidance and counseling to improve understanding of the religious character of elementary school students. The research method used is the Sugiyono Research and Development model which describes the stages in the research and development method as many as ten stages of research and development, but in this study, the researchers limited it to the product trial stage without reducing the essence of the research. To find out the practicality and feasibility of the media, researchers validated media experts, linguists, and guidance and counseling experts to see the feasibility and asked for input before being tested on elementary school students.
Based on the results of product trials on high grade students (4-6) at State Elementary School 12 Telaga Biru, Gorontalo Regency. Stating that the product made is feasible to be used as a medium of guidance and counseling to improve understanding of the religious character of elementary school students
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Marharyta, Pashkovska. "Timbre-image of the viola in Valentin Bibik’s Fifth String Quartet in the context of the «last work» concept." Problems of Interaction Between Arts, Pedagogy and the Theory and Practice of Education 62, no. 62 (September 16, 2022): 153–74. http://dx.doi.org/10.34064/khnum1-62.10.
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Statement of the problem. The opuses, which were created at the final stage of the composer’s creative path – namely, V. Bibik’s Fifth String Quartet – always arouse the special interest of researchers as the “last word” of the artist, which accumulates the peculiarities of his thinking and contributes to the integrity of the perception of his work We are particularly interested in the fact that quite often the latest works of composers, par excellence, those of the 19–21 centuries, are associated with the timbre of the viola (J. Brahms, M. Reger, D. Shostakovich, B. Britten, B. Bartok, P. Hindemith, B. Martinu, E. Bloch, A. Khachaturyan and others), which can also be traced in V. Bibik’s work. The phenomenon of involving the viola in the late opuses of composers of the 19–21 centuries has not been specifically considered so far, therefore, the discovery and application of this research angle constitutes a certain scientific novelty of our work. The purpose of the presented research is to consider the specifics of the application of the timbre semantics of the viola in the late works of the famous Ukrainian composer Valentyn Bibik (1940–2003) using the example of his Fifth String Quartet (2002). A set of general and special musicological approaches was used to explore the topic: historical and biographical in the study of V. Bibik’s life and creative path; stylistic, since the specifics of the composer’s late style are considered; semantic, in connection with the study of the timbre image of the viola; organological, in connection with the analysis of timbre-sematic and articulation-stroke means of expression; the method of performance analysis, focused on revealing the semantics of the viola timbre in the researched work. The article presents the references to works by researchers on the issue of the semantics of the timbre-image of the viola (Kosenko, 2018; Kupriyanenko, 2005; Horodetskyi, 2019 and others), on the studies dedicated to the issues of periodization of the work of composers, in particular, the typology of late period of creativity (Savytska, 2008, 2010), and on some works devoted to V. Bibik (Shapovalova, 2007a, b; Ivanova, & Mizitova, 2020; Shchetynsky, 2021, Serhaniuk, Shapovalova, Nikolaievska, & Kopeliuk, 2021). Results and conclusions. Based on the research of G. Kosenko, E. Kupriyanenko, and A. Horodetskyi, we have deduced some parameters for analyzing the semantics of the viola timbre-image: – creating a semantic “image of the instrument”; – accentuation of timbre qualities that express its specificity; – selection of intonations that form psychological characteristics presented by the alto timbre; – emphasis on various timbre components that influence the richness of the viola timbre. – performance influence on the timbre-image of the viola; – gravitation of the alto timbre towards certain moods; – use of two opposite parts of the viola register (high – low) for the characterization of internally contrasting images. The typology of creative periods (according to N. Savytska, 2008) was projected onto the work of V. Bibik, as a result of which it was found out that the late period of his compositional activity (according to our periodization – 1994–2003) can be attributed to the “consolidating” type, since the main constants of the artist’s style such as philosophical aspect, symphonism, polyphonisation, monologisation, meditative type of the dramaturgy are preserved. A compositional and dramaturgical analysis of the Fifth String Quartet was done, the techniques of instrumental exposition and development of thematic material were considered, attention was focused on the peculiarities of the use of the timbre image of the viola in the semantic field of the work. Based on the analysis of the Quartet, taking into account the stylistic dominants of the composer’s work, the main trends in the use of the viola timbre in V. Bibik’s late work are highlighted. It is concluded that the composer significantly expands its semantic spectrum due to the technical and performance capabilities of the instrument.
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Hannan, Hannan, Pratiwi Wikaningtyas, and I. Ketut Adnyana. "Edukasi Anti Penyalahgunaan Obat Kepada Siswa SD Di Kota Palu Melalui Media Kartu Kuartet." Jurnal Farmasi Galenika (Galenika Journal of Pharmacy) (e-Journal) 5, no. 1 (March 19, 2019): 20–25. http://dx.doi.org/10.22487/j24428744.2019.v5.i1.11933.
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Cases of illegal drugs and drug abuse in the elementary school community in Indonesia is increasingly massive and alarming. An innovation to protect elementary school students from that situation is through the colaboration of academics from Bandung Institute of Technology with FDA in Palu in the form education of anti-drug abuse for elementary school students through quartet card media. The aim of the study was to determine the effect of the education on anti-drug abuse knowledge in fifth grade students in Palu City. The research method used pre-experimental design with the design of one group pretest-posttest on three elementary schools which were representatives of three ranks namely; good, quite good and not good based on the results of the Smart-Accurate Quiz FDA in Palu for elementary school level in 2017. The sampling technique used purposive sampling. Observation of knowledge of elementary students using questionnaires that have been tested for validity and reliability had been carried out. The pretest and posttest were conducted before and after education. The comparison of pretest and posttest data in each elementary school was analyzed using paired T test whereas for all elementary school data analyzed using the Wilcoxon test with hypotheses. There was an influence of anti-drug abuse education through quartet card media on anti-drug abuse knowledge in fifth grade students in Palu City. The results showed that there was an influence of education on anti-drug abuse knowledge in fifth grade students from elementary school representatives “good and quite good ranking” with p values of 0.005 and p ≤ 0.001, while in elementary schools representatives “not good ranking”, the education did not influence their knowledge with a p value of 0.149. Analysis of the Wilcoxon test in all elementary schools showed a p value p ≤ 0,001, which meant that education had an influence on the knowledge of fifth grade students in elementary schools in Palu City.
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Wang, Zheng-Xin, Ji-Min Wu, Chao-Jun Zhou, and Qin Li. "Identifying the factors of China's seasonal retail sales of consumer goods using a data grouping approach–based GRA method." Grey Systems: Theory and Application 10, no. 2 (April 3, 2020): 125–43. http://dx.doi.org/10.1108/gs-11-2019-0055.
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PurposeSeasonal fluctuation interference often affects the relational analysis of economic time series. The main purpose of this paper is to propose a new grey relational model for relational analysis of seasonal time series and apply it to identify and eliminate the influence of seasonal fluctuation of retail sales of consumer goods in China.Design/methodology/approachFirst, the whole quarterly time series is divided into four groups by data grouping method. Each group only contains the time series data in the same quarter. Then, the new series of four-quarters are used to establish the grey correlation model and calculate its correlation coefficient. Finally, the correlation degree of factors in each group of data was calculated and sorted to determine its importance.FindingsThe data grouping method can effectively reflect the correlation between time series in different quarters and eliminate the influence of seasonal fluctuation.Practical implicationsIn this paper, the main factors influencing the quarterly fluctuations of retail sales of consumer goods in China are explored by using the grouped grey correlation model. The results show that the main factors are different from quarter to quarter: in the first quarter, the main factors are money supply, tax and per capita disposable income of rural residents. In the second quarter are money supply, fiscal expenditure and tax. In the third quarter are money supply, fiscal expenditure and per capita disposable income of rural residents. In the fourth quarter are money supply, fiscal expenditure and tax.Originality/valueThis paper successfully realizes the application of grey relational model in quarterly time series and extends the applicable scope of grey relational model.
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Oshima, Masaharu, Tatsuyuki Yoshida, Kohei Koyama, and Taminori Moriyama. "A method for assessing loss in milk yield due to subclinical mastitis." Journal of Dairy Research 57, no. 3 (August 1990): 319–24. http://dx.doi.org/10.1017/s0022029900026960.
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SummaryA method for assessing the loss in quarter milk yield due to subclinical mastitis is proposed. It is based upon two indices calculated from quarter milk yields and results from the assessment of mastitis obtained by measurement of the electrical conductivity of milk. The results were obtained from the cows through repeated quarter-milkings during several months of lactation. The grade of abnormality of a quarter with subclinical mastitis was expressed by the first index, the mean quarter difference of electrical conductivity of milk produced by the quarter (mQdEC, 25 °C). The reduction in milk yield of a quarter presumed to be due to subclinical mastitis was expressed by another index, the quarter yield ratio, R, which is that percentage of normal milk yield produced by a quarter with mastitis. Examination of the relationship between these two indices showed that subclinical mastitis caused a reduction in milk yield in the affected quarters. From the linear regression, it was found that ~3% reduction in quarter milk yield occurred for every 1 x 10–4 S/cm increase in the mQdEC of the quarter with presumed subclinical mastitis.
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Yang, Jialiang, Stefan Grünewald, Yifei Xu, and Xiu-Feng Wan. "Quartet-based methods to reconstruct phylogenetic networks." BMC Systems Biology 8, no. 1 (2014): 21. http://dx.doi.org/10.1186/1752-0509-8-21.
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Dibaeinia, Payam, Shayan Tabe-Bordbar, and Tandy Warnow. "FASTRAL: improving scalability of phylogenomic analysis." Bioinformatics 37, no. 16 (February 8, 2021): 2317–24. http://dx.doi.org/10.1093/bioinformatics/btab093.
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Abstract Motivation ASTRAL is the current leading method for species tree estimation from phylogenomic datasets (i.e. hundreds to thousands of genes) that addresses gene tree discord resulting from incomplete lineage sorting (ILS). ASTRAL is statistically consistent under the multi-locus coalescent model (MSC), runs in polynomial time, and is able to run on large datasets. Key to ASTRAL’s algorithm is the use of dynamic programming to find an optimal solution to the MQSST (maximum quartet support supertree) within a constraint space that it computes from the input. Yet, ASTRAL can fail to complete within reasonable timeframes on large datasets with many genes and species, because in these cases the constraint space it computes is too large. Results Here, we introduce FASTRAL, a phylogenomic estimation method. FASTRAL is based on ASTRAL, but uses a different technique for constructing the constraint space. The technique we use to define the constraint space maintains statistical consistency and is polynomial time; thus we prove that FASTRAL is a polynomial time algorithm that is statistically consistent under the MSC. Our performance study on both biological and simulated datasets demonstrates that FASTRAL matches or improves on ASTRAL with respect to species tree topology accuracy (and under high ILS conditions it is statistically significantly more accurate), while being dramatically faster—especially on datasets with large numbers of genes and high ILS—due to using a significantly smaller constraint space. Availabilityand implementation FASTRAL is available in open-source form at https://github.com/PayamDiba/FASTRAL. Supplementary information Supplementary data are available at Bioinformatics online.
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BÉG, O. ANWAR, V. R. PRASAD, and B. VASU. "NUMERICAL STUDY OF MIXED BIOCONVECTION IN POROUS MEDIA SATURATED WITH NANOFLUID CONTAINING OXYTACTIC MICROORGANISMS." Journal of Mechanics in Medicine and Biology 13, no. 04 (July 7, 2013): 1350067. http://dx.doi.org/10.1142/s021951941350067x.
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A mathematical model has been developed for steady-state boundary layer flow of a nanofluid past an impermeable vertical flat wall in a porous medium saturated with a water-based dilute nanofluid containing oxytactic microorganisms. The nanoparticles were distributed sufficiently to permit bioconvection. The product of chemotaxis constant and maximum cell swimming speed was assumed invariant. Using appropriate transformations, the partial differential conservation equations were non-dimensionalised to yield a quartet of coupled, non-linear ordinary differential equations for momentum, energy, nanoparticle concentration and dimensionless motile microorganism density, with appropriate boundary conditions. The dominant parameters emerging in the normalised model included the bioconvection Lewis number, bioconvection Peclet number, Lewis number, buoyancy ratio parameter, Brownian motion parameter, thermophoresis parameter, local Darcy-Rayleigh number and the local Peclet number. An implicit numerical solution to the well-posed two-point non-linear boundary value problem is developed using the well-tested and highly efficient Keller box method. Computations are validated with the Nakamura tridiagonal implicit finite difference method, demonstrating excellent agreement. Nanoparticle concentration and temperature were found to be generally enhanced through the boundary layer with increasing bioconvection Lewis number, whereas dimensionless motile microorganism density was only increased closer to the wall. Temperature, nanoparticle concentration and dimensionless motile microorganism density were all greatly increased with a rise in Peclet number. Temperature and dimensionless motile microorganism density were reduced with increasing buoyancy parameter, whereas nanoparticle concentration was increased. The present study found applications in the fluid mechanical design of microbial fuel cell and bioconvection nanotechnological devices.
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Wu, Xianhua, Lei Zhou, Ji Guo, and Hui Liu. "Impacts of Typhoons on Local Labor Markets based on GMM: An Empirical Study of Guangdong Province, China." Weather, Climate, and Society 9, no. 2 (March 20, 2017): 255–66. http://dx.doi.org/10.1175/wcas-d-16-0079.1.
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Abstract What impacts do typhoons have on local labor markets? Few empirical researches have been conducted in China. By collecting the data of 23 quarters (3-month intervals) of Guangdong province from 2009 to 2014 and using the generalized method of moments (GMM), this paper analyzes the impacts of typhoons on labor markets from the perspectives of general effect, regional effect, intensity effect, and time effect. In addition, a comparative analysis is carried out between this study and similar studies of developed countries. The results show that 1) massive typhoons resulted in a 12.5% increase in employment but did not have a significant impact on Guangdong’s per capita employee remuneration, and 2) there are periodic features to typhoons’ impacts on employment. Typhoons influence employment in a four-quarter cycle. In the quarter affected by a typhoon, the first quarter, the number of employees increased by 17.4%. The quantity of labor employed in the subsequent two quarters shows no significant change. In the last quarter, the number of employed people decreases by 17.0%, which returns to predisaster levels. Additionally, 3) the results of this study are different from those of studies involving developed countries, which may be caused by the distinctiveness of China’s labor market. Finally, conclusions and corresponding suggestions are presented.
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Velichkin, Victor Z., Marina V. Petrochenko, Ksenia I. Strelets, Evgeniya B. Zavodnova, and Anna Yu Gorodishenina. "The branch and bound method applied to the construction of residential quarters." Vestnik MGSU, no. 1 (January 2021): 91–104. http://dx.doi.org/10.22227/1997-0935.2021.1.91-104.
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Introduction. When construction works are scheduled within the framework of a project that encompasses the construction of civil or industrial facilities representing a residential quarter, the focus is placed on the continuous operation of particular specialized construction departments, subject to the adherence to applicable technologies and compliance with standard deadlines that apply to the construction of buildings. The relevance of this problem stems from the complexity of coordination of works to be performed by contractors and subcontractors, involved in the development of a quarter and responsible to the general contractor. The purpose of this research is to analyze and apply the branch and bound method to the problems arising in the course of scheduling the construction of a quarter using special methods of the scheduling theory.
Materials and methods. The article addresses the problem of continuous operation of special-focus construction departments subject to the adherence to applicable technologies and compliance with standard deadlines set for the construction of individual structures when scheduling the construction of residential quarters.
Results. The solution, based on the branch and bound method, is proposed. The construction of eight buildings, that comprise a residential quarter, is taken as an example. Matrices, representing continuous workflows for different methods of work organization, were obtained; principal parameters of integrated workflows, encompassing the construction of the quarter structures, were calculated with regard for the commencement and completion time for each specialized workflow at each individual structure. A displacement matrix was used to consolidate all eight structures. Two principal methods of reorganizing the integrated quarterly workflow are considered.
Conclusions. The branch and bound method is used to compare original and optimized matrices; calculation results are presented. The strengths and weaknesses of the critical path/continuous resource employment method are illustrated by the project that encompasses the construction of eight facilities in a residential quarter.
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Tang Feilong, 汤飞龙, 李中梁 Li Zhongliang, 步扬 Bu Yang, 王向朝 Wang Xiangzhao, 范李立 Fan Lili, 王瑄 Wang Xuan, and 曹绍谦 Cao Shaoqian. "Calibration of Rotating Quarter-Wave Method Based Polarimeter." Acta Optica Sinica 33, no. 9 (2013): 0912005. http://dx.doi.org/10.3788/aos201333.0912005.
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Sunarto, Andang, Praveen Agarwal, Jumat Sulaiman, Jackel Vui Lung Chew, and Shaher Momani. "Quarter-Sweep Preconditioned Relaxation Method, Algorithm and Efficiency Analysis for Fractional Mathematical Equation." Fractal and Fractional 5, no. 3 (August 14, 2021): 98. http://dx.doi.org/10.3390/fractalfract5030098.
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Research into the recent developments for solving fractional mathematical equations requires accurate and efficient numerical methods. Although many numerical methods based on Caputo’s fractional derivative have been proposed to solve fractional mathematical equations, the efficiency of obtaining solutions using these methods when dealing with a large matrix requires further study. The matrix size influences the accuracy of the solution. Therefore, this paper proposes a quarter-sweep finite difference scheme with a preconditioned relaxation-based approximation to efficiently solve a large matrix, which is based on the establishment of a linear system for a fractional mathematical equation. The paper presents the formulation of the quarter-sweep finite difference scheme that is used to approximate the selected fractional mathematical equation. Then, the derivation of a preconditioned relaxation method based on a quarter-sweep scheme is discussed. The design of a C++ algorithm of the proposed quarter-sweep preconditioned relaxation method is shown and, finally, efficiency analysis comparing the proposed method with several tested methods is presented. The contributions of this paper are the presentation of a new preconditioned matrix to restructure the developed linear system, and the derivation of an efficient preconditioned relaxation iterative method for solving a fractional mathematical equation. By simulating the solutions of time-fractional diffusion problems with the proposed numerical method, the study found that computing solutions using the quarter-sweep preconditioned relaxation method is more efficient than using the tested methods. The proposed numerical method is able to solve the selected problems with fewer iterations and a faster execution time than the tested existing methods. The efficiency of the methods was evaluated using different matrix sizes. Thus, the combination of a quarter-sweep finite difference method, Caputo’s time-fractional derivative, and the preconditioned successive over-relaxation method showed good potential for solving different types of fractional mathematical equations, and provides a future direction for this field of research.
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Kashapov, Il'dar, Bulat Ziganshin, Yuriy Tsoy, Ruslan Lukmanov, and Aleksandr Fokin. "THE STUDY OF UNEVEN DEVELOPMENT OF THE UDDER QUARTERS OF THE ANIMAL." Vestnik of Kazan State Agrarian University 15, no. 3 (November 30, 2020): 84–87. http://dx.doi.org/10.12737/2073-0462-2020-84-87.
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Increasing the economic efficiency of machine milking is possible by using high-performance, partially and (or) fully automated milking units using advanced milking technologies. When milking animals with traditional milking machines, turning off the milking cups occurs simultaneously, without taking into account the uneven development of the udder quarters, this can eventually lead to dry milking of the udder quarters, which is fraught with consequences. To substantiate this issue, an analysis was made of the work of DeLaval milking robot in Timershik farm of Saba LLC in the Sabinsky district of the Republic of Tatarstan.
The results of the study of uneven development of cow udder shares based on the processing of the data obtained showed that a large number of animals in the herd have uneven development of udder quarters, but they are superior in productivity to other cows and culling of these animals due to uneven development of udder quarters is excluded.
In this connection, the method proposed by Safiullin N.A. for assessing the uniformity of development of udder quarters is considered, which consists in the following: after determining the number of milk yields by quarters, the coefficient of variation is calculated and the indicators of uniformity of development of quarters are calculated. In our opinion, this method of analysis is more effective. We also analyzed the milk yield curves for udder quarters and proposed a scheme of integral milk yield curves. The obtained curves once again prove that milk production in animals by udder shares does not end in the same way.
Based on the data obtained, it can be stated that the development of a domestic automated milking machine with a quarter-turn shutdown of milking cups is an urgent task today.
The obtained data are necessary for the development of a domestic automated milking machine with a quarter-turn shutdown of milking cups
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Meshcheriak, Oleh, and Oleh Velychko. "CALIBRATION OF QUARTZ ELECTRONIC STOPWATCHERS COMPARISON METHOD USING A DIGITAL CAMERA." Measuring Equipment and Metrology 83, no. 3 (2022): 23–29. http://dx.doi.org/10.23939/istcmtm2022.03.023.
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Measurement of time intervals with low accuracy on intervals from a few seconds to several hours or days is relevant for some broad applications in various fields of activity. Such measurements are widely used in the technological processes of various enterprises during the preparation and quality control of the preparation of medicines, during the maintenance of technical equipment and mechanisms, chemical technological processes, etc. For such measurements, manual electronic quartz stopwatches are widely used, which, despite their not too high measurement accuracy, must guarantee users the accuracy of measurements within the tolerance established by the technical documentation, since the risks of using untested measuring equipment are quite high, or generally unacceptable especially in the medical field. The issue of calibrating quartz electronic stopwatches by various methods remains relevant for many of their applications. The article discusses the calibration of quartz electronic stopwatches by the method of comparison using a digital camera. A calibration scheme for stopwatches was developed and a calibration measurement model was created based on the developed calibration scheme. The contribution of each component of the measurement model to the calibration result and the corresponding uncertainties of the model components were determined. The measurement uncertainty budget was made based on the proposed stopwatch calibration model. The influence of the most significant influential values on the accuracy of measurement results was analyzed. The content of quantitative and qualitative correction indicators, which must be taken into account during calibration to achieve the highest accuracy of measurements, is revealed. The method of calibrating stopwatches described in the article can be used in calibration laboratories that have the appropriate equipment and standards.
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S. Blahun, Ivan, Ivan I. Blahun, and Semen I. Blahun. "Assessing the stability of the banking system based on fuzzy logic methods." Banks and Bank Systems 15, no. 3 (October 7, 2020): 171–83. http://dx.doi.org/10.21511/bbs.15(3).2020.15.
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The functioning of the country’s banking system is the basis for ensuring its economic development and stability. The state of the banking system often causes financial crises; therefore, ensuring its stable work is one of the main tasks of monetary policy. Meanwhile, it is important to find approaches to a comprehensive assessment and forecasting of the stability of the banking system that would allow obtaining adequate results.Based on a sample of data generated for the period from 2008 to the 1st quarter of 2020 with a quarterly breakdown, an integrated stability index of Ukraine’s banking system was estimated. The analysis was based on 23 variables that characterize certain aspects of the functioning of the Ukrainian banking system.Using the principal component analysis, five factors have been identified that have the greatest impact on ensuring the stability of the banking system. They were used to form an integrated index based on the application of the Mamdani fuzzy logic method. The results obtained adequately reflected the state of stability of the banking system for the analyzed period, which coincided in time with the crisis phenomena occurring in the Ukrainian banking system. The obtained value of the integrated index characterizes the stability of Ukraine’s banking system at the average level, since it depends not only on the internal state of the system, but also on the influence of external factors, both national and international.
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Zhao, Huajun, and Dairong Yuan. "Quarter wave retarder design with subwavelength gratings based on modal method." Optik 127, no. 1 (January 2016): 212–14. http://dx.doi.org/10.1016/j.ijleo.2015.10.045.
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ZHU, QIANG, YUMING LIU, and DICK K. P. YUE. "Resonant interactions between Kelvin ship waves and ambient waves." Journal of Fluid Mechanics 597 (February 1, 2008): 171–97. http://dx.doi.org/10.1017/s002211200700969x.
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We consider the nonlinear interactions between the steady Kelvin waves behind an advancing ship and an (unsteady) ambient wave. It is shown that, for moderately steep ship waves and/or ambient waves, third-order (quartet) resonant interaction among the two wave systems could occur, leading to the generation of a new propagating wave along a specific ray in the Kelvin wake. The wave vector of the generated wave as well as the angle of the resonance ray are determined by the resonance condition and are functions of the ship forward speed and the wave vector of the ambient wave. To understand the resonance mechanism and the characteristics of the generated wave, we perform theoretical analyses of this problem using two related approaches. To obtain a relatively simple model in the form of a nonlinear Schrödinger (NLS) equation for the evolution of the resonant wave, we first consider a multiple-scale approach assuming locally discrete Kelvin wave components, with constant wave vectors but varying amplitudes along the resonance ray. This NLS model captures the key resonance mechanism but does not account for the detuning effect associated with the wave vector variation of Kevin waves in the neighbourhood of the resonance ray. To obtain the full quantitative features and evolution characteristics, we also consider a more complete model based on Zakharov's integral equation applied in the context of a continuous wave vector spectrum. The resulting evolution equation can be reduced to an NLS form with, however, cross-ray variable coefficients, on imposing a narrow-band assumption valid in the neighbourhood of the resonance ray. As expected, the two models compare well when wave vector detuning is small, in the near wake close to the ray. To verify the analyses, direct high-resolution simulations of the nonlinear wave interaction problem are obtained using a high-order spectral method. The simulations capture the salient features of the resonance in the near wake of the ship, with good agreements with theory for the location of the resonance and the growth rate of the generated wave.
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Fahey, Margaret C., Robert C. Klesges, Mehmet Kocak, Leslie A. Gladney, Gerald W. Talcott, and Rebecca A. Krukowski. "Counselor Efficiency at Providing Feedback in a Technology-Based Behavioral Weight Loss Intervention: Longitudinal Analysis." JMIR Formative Research 5, no. 5 (May 5, 2021): e23974. http://dx.doi.org/10.2196/23974.
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Background Feedback for participants’ self-monitoring is a crucial and costly component of technology-based weight loss interventions. Detailed examination of interventionist time when reviewing and providing feedback for online self-monitoring data is lacking. Objective The aim of this study was to longitudinally examine the time counselors spent providing feedback on participant self-monitoring data (ie, diet, physical activity, weight) in a 12-month technology-based weight loss intervention. We hypothesized that counselors would compose feedback for participants more quickly over time. Methods The time the lay counselors (N=10) spent reviewing self-monitoring records and providing feedback to participants via email was longitudinally examined for all counselors across the three years of study implementation. Descriptives were observed for counselor feedback duration across counselors by 12 annual quarters (ie, 3-month periods). Differences in overall duration times by each consecutive annual quarter were analyzed using Wilcoxon-Mann-Whitney tests. Results There was a decrease in counselor feedback duration from the first to second quarter (mean 53 to 46 minutes; P<.001), and from the second to third (mean 46 to 30 minutes; P<.001). A trend suggested a decrease from the third to fourth quarter (mean 30 to 26 minutes; P=.053), but no changes were found in subsequent quarters. Consistent with the hypothesis, counselors may be increasing their efficiency in providing feedback; across 12 months, counselors spent less time reviewing participant self-monitoring and composing feedback (decreasing from mean 53 to 26 minutes). Conclusions Counselors used increasingly less time to review online self-monitoring data and compose feedback after the initial 9 months of study implementation. Results inform counselor costs for future technology-based behavioral weight loss interventions. For example, regardless of increasing counselor efficiency, 25-30 minutes per feedback message is a high cost for interventions. One possibility for reducing costs would be generating computer-automated feedback. Trial Registration ClinicalTrials.gov NCT02063178; https://clinicaltrials.gov/ct2/show/NCT02063178
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Budiwati, Hesti, and Ainun Jariah. "Asset Quality as a Predictor of Rural Bank Bankruptcy in Indonesia." Jurnal Ilmu Manajemen Advantage 4, no. 1 (January 12, 2021): 44–45. http://dx.doi.org/10.30741/adv.v4i1.612.
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The study aims to form a bankruptcy prediction model of rural bank in Indonesia at a time variation of 1 quarter (MP1), 2 quarters (MP2), 4 quarters (MP4), and 8 quarters (MP8) before bankruptcy. The quality of productive assets as a predictor variable consist of CEA, CEAEA, and NPL. The condition of rural bank bankrupt and non bankrupt as a dependent variable. The analytical method used is logistic regression followed by testing the model accuration. The population of this study is rural bank in Indonesia. The sample used was 241 rural banks that consist of 41 bankrupt rural banks and 200 non bankrupt rural banks. The data used are the quarterly financial statements of 2006 to 2019. The study result showed that of the four prediction models that successfully built, the 1 quarter (MP1) is the most feasible and accurate used as bankruptcy prediction model of rural banks in Indonesia that formed by CEAEA and NPL ratio. The MP1 has a classification accuracy of 93,8% at the level of modelling with cut off point of 0,29 and it has a classification accuracy of 83,93% at the level of validation with cut off point of 0,12. Based on those advantage, the MP1 was chosen as a model that able to predict the bankruptcy of rural bank in Indonesia.
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Banerjee, Imon, Selen Bozkurt, Jennifer Lee Caswell-Jin, Allison W. Kurian, and Daniel L. Rubin. "Natural Language Processing Approaches to Detect the Timeline of Metastatic Recurrence of Breast Cancer." JCO Clinical Cancer Informatics, no. 3 (December 2019): 1–12. http://dx.doi.org/10.1200/cci.19.00034.
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PURPOSE Electronic medical records (EMRs) and population-based cancer registries contain information on cancer outcomes and treatment, yet rarely capture information on the timing of metastatic cancer recurrence, which is essential to understand cancer survival outcomes. We developed a natural language processing (NLP) system to identify patient-specific timelines of metastatic breast cancer recurrence. PATIENTS AND METHODS We used the OncoSHARE database, which includes merged data from the California Cancer Registry and EMRs of 8,956 women diagnosed with breast cancer in 2000 to 2018. We curated a comprehensive vocabulary by interviewing expert clinicians and processing radiology and pathology reports and progress notes. We developed and evaluated the following two distinct NLP approaches to analyze free-text notes: a traditional rule-based model, using rules for metastatic detection from the literature and curated by domain experts; and a contemporary neural network model. For each 3-month period (quarter) from 2000 to 2018, we applied both models to infer recurrence status for that quarter. We trained the NLP models using 894 randomly selected patient records that were manually reviewed by clinical experts and evaluated model performance using 179 hold-out patients (20%) as a test set. RESULTS The median follow-up time was 19 quarters (5 years) for the training set and 15 quarters (4 years) for the test set. The neural network model predicted the timing of distant metastatic recurrence with a sensitivity of 0.83 and specificity of 0.73, outperforming the rule-based model, which had a specificity of 0.35 and sensitivity of 0.88 ( P < .001). CONCLUSION We developed an NLP method that enables identification of the occurrence and timing of metastatic breast cancer recurrence from EMRs. This approach may be adaptable to other cancer sites and could help to unlock the potential of EMRs for research on real-world cancer outcomes.
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Jiang Chao, 蒋超, 郭仁慧 Guo Renhui, 张辉钦 Zhang Huiqin, 周翔 Zhou Xiang, 郑东晖 Zheng Donghui, and 陈磊 Chen Lei. "Method of Fizeau Simultaneous Phase-Shifting Interferometry Based on Quarter-Wave Plate." Laser & Optoelectronics Progress 53, no. 10 (2016): 101203. http://dx.doi.org/10.3788/lop53.101203.
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Maarif, Samsul, Krisna Satrio Perbowo, and Rahmat Kusharyadi. "Depicting Epistemological Obstacles in Understanding the Concept of Sequence and Series." IndoMath: Indonesia Mathematics Education 4, no. 1 (February 9, 2021): 66. http://dx.doi.org/10.30738/indomath.v4i1.9339.
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This study aimed to discover epistemological obstacle on secondary students to solve sequence and series problems based on three indicators, there are a conceptual obstacle, procedural obstacle, and operational technique obstacle. This study was descriptive with qualitative research approaches. Data were collected with the test and interview method. The subjects in this study are students of SMP Negeri 86 Jakarta class VIII based on the errors seen from the diagnostic tests that had been tested. The analysis was done by giving written tests which are essay and interview formatted. Results on analysis showed that: (1) Conceptual obstacle, obstacle that was experienced by students are: students considered that a pattern was said as a numeral pattern because they own odd numeral pattern and own 2,2,2 of difference; were not able to find exact pattern within the problem; considering that Fibonacci numeral sequence was a pattern that form prime numeral pattern; were not able to differ the concept of arithmetics and geometry sequence; were not able to understand the concept of first quarter on arithmetics sequence; error when interpreted the meaning of problems; were not able to intepret what was given on mathematics model; interpreting sum of the first 20 quarters with sequences which own the 20th quarter; and interpreting sum of the first 20 quarters with the 20th quarter; (2) While on procedural obstacle, obstacle that was experienced are: interpreting numeral pattern if they own their pair; error on determining multiplication or difference; and applying formulas incorrectly; (3) Last on operasional technique obstacle, obstacle that was experienced are error on calculation and using sign and symbol mathematics incorrectly.
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Zheng, Jane. "NORMATIVE APPROACHES IN MAKING CULTURAL QUARTERS AND ASSESSMENT OF CREATIVE INDUSTRY PARKS IN SHANGHAI." JOURNAL OF ARCHITECTURE AND URBANISM 42, no. 2 (November 16, 2018): 134–54. http://dx.doi.org/10.3846/jau.2018.6212.
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This article aims to synthesize the principles of making cultural quarters in literature and test their applicability in creative industry parks in the Chinese context. Extant literature on creative industry parks in China lacks an evaluation instrument for evaluating the performance of creative industry parks. This research reviews normative theories regarding cultural quarter making and identifies three approaches, namely the area-based approach in cultural quarter design, architectural design principles (tailored to cultural quarters), and a comprehensive framework that comprises three dimensions, i.e., activity, built form, and meaning. These normative approaches were applied to evaluate the quality of creative industry parks that emerged in Shanghai in the recent decade. Qualitative research methods, including on-site reconnaissance, observation, and interview, were adopted. The former two approaches revealed good design practices in Shanghai’s creative industry parks. A systematic evaluation of the said parks through a comparative study suggests significant disparity in the dimensions of architectural design and place making. Additionally, indicators of state support for micro and small creative industry companies and arts funding are less applicable in Shanghai. These findings reveal the role of the private sector in constructing a diversified creative environment which was previously enshrined by the state. With these outcomes, this research partially endorses the value of the normative theories to guide the practice of making and evaluating cultural quarters in the Chinese context.
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Legault, Marc-André, Simon Girard, Louis-Philippe Lemieux Perreault, Guy A. Rouleau, and Marie-Pierre Dubé. "Comparison of Sequencing Based CNV Discovery Methods Using Monozygotic Twin Quartets." PLOS ONE 10, no. 3 (March 26, 2015): e0122287. http://dx.doi.org/10.1371/journal.pone.0122287.
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Guo, Hui, Yansong Wang, Xiaolan Wang, and Chi Xu. "Investigation on acoustic energy harvesting based on quarter-wavelength resonator phononic crystals." Advances in Mechanical Engineering 10, no. 1 (January 2018): 168781401774807. http://dx.doi.org/10.1177/1687814017748077.
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This article presents the development of an acoustic energy harvester using a quarter-wavelength resonator phononic crystals together with piezoelectric vibrators. The quarter-wavelength resonator phononic crystals consist of a main wave duct, several quarter-wavelength resonators, and equivalent piezoelectric vibrators. The acoustic energy is converted to mechanical energy when the sound incident in the quarter-wavelength resonator generates an oscillatory pressure as of localization efficiency, which in turns causes piezoelectric vibrators vibrating. Transfer matrix method is used to provide a physical insight into the structure band of the quarter-wavelength resonator phononic crystals, and finite element method is used to analyze the sound localization effect and evaluate the reclaimed energy of the quarter-wavelength resonator phononic crystals. Results indicate that the numerical analysis agrees well with experiments. When the frequencies of the incident sound are near both sides of the bandgap, the maximum output voltage always can be obtained.
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Kozak, Ya. "PULSE METHOD FOR DETERMINATION OF TIME PARAMETERS THERMAL FIRE DETECTOR." Municipal economy of cities 4, no. 164 (October 1, 2021): 166–70. http://dx.doi.org/10.33042/2522-1809-2021-4-164-166-170.
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For thermal fire detectors with a thermoresistive sensitive element, the method of determining its time parameters is justified. The time parameters of operation and the time constant of the thermal fire detector are considered as time parameters. The method is based on the use of the Joule-Lenz effect, for the implementation of which single pulses of electric current are passed through the thermoresistive sensitive element of the fire detector. Pulses having the shape of a quarter sinusoid or a quarter cosinusoid are used as such test signals. Using the Laplace integral transformation, analytical expressions are obtained, which represent the formalization of the reaction of the thermoresistive sensitive element of the fire detector to the corresponding test signals. These analytical expressions are used to obtain the functional dependences of the fire detector time constants on the pulse duration of the electric current and the auxiliary parameter. The auxiliary parameter is the ratio of the values of the output signal of the thermal fire detector at two fixed points in time. This choice of auxiliary parameter allows to ensure invariance with respect to the transfer coefficient of the thermal fire detector with a thermoresistive sensing element. The fixed moments of time are chosen to be equal to half and three quarters of the duration of the pulses of electric current flowing through the thermoresistive sensitive element of the fire detector. The time of operation of the thermal fire detector is determined in the form of two additive components, one of which is a time constant of the fire detector, and the other is determined by the values of normalized parameters in accordance with existing regulations. A sequence of procedures is given, which together represent a method of determining the time parameters of thermal fire detectors of this type.
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Li, Ai-jun, Yong Liu, and Zuo-rui Lyu. "Analysis of water wave interaction with a submerged quarter-circular breakwater using multipole method." Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment 234, no. 4 (March 24, 2020): 846–60. http://dx.doi.org/10.1177/1475090220910594.
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This article studies water wave interaction with a submerged quarter-circular breakwater based on potential theory and multipole expansion method. The obliquely and normally incident waves are independently considered. The series solution of velocity potential in the external fluid domain is expressed through the multipole expansions, while the series solution of velocity potential in the quarter-circular internal fluid domain is obtained through the separation of variables. Then, the unknown coefficients in the series solutions are determined by matching the boundary conditions between external and internal fluid domains. The calculation methods for the reflection and transmission coefficients of the submerged quarter-circular breakwater as well as the horizontal and vertical wave forces on the breakwater are presented. The wave forces acting on the submerged breakwater with a seaside quarter-circular-arc and that with a leeside quarter-circular-arc are compared. The hydrodynamic quantities of the submerged quarter-circular breakwater are also compared with those of the submerged semi-circular breakwater. In addition, the effects of breakwater radius, incident frequency, and incident angle on the hydrodynamic quantities of the quarter-circular breakwater are clarified. Valuable results for practical engineering application are drawn.
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Lee, Bu Hyoung. "Bootstrap Prediction Intervals of Temporal Disaggregation." Stats 5, no. 1 (February 18, 2022): 190–202. http://dx.doi.org/10.3390/stats5010013.
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In this article, we propose an interval estimation method to trace an unknown disaggregate series within certain bandwidths. First, we consider two model-based disaggregation methods called the GLS disaggregation and the ARIMA disaggregation. Then, we develop iterative steps to construct AR-sieve bootstrap prediction intervals for model-based temporal disaggregation. As an illustration, we analyze the quarterly total balances of U.S. international trade in goods and services between the first quarter of 1992 and the fourth quarter of 2020.