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Journal articles on the topic 'Variants of the p-Center problem'

Author: Grafiati

Published: 15 June 2024

Last updated: 31 July 2025

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1

Dupin, Nicolas, Frank Nielsen, and El-Ghazali Talbi. "Unified Polynomial Dynamic Programming Algorithms for P-Center Variants in a 2D Pareto Front." Mathematics 9, no. 4 (2021): 453. http://dx.doi.org/10.3390/math9040453.

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With many efficient solutions for a multi-objective optimization problem, this paper aims to cluster the Pareto Front in a given number of clusters K and to detect isolated points. K-center problems and variants are investigated with a unified formulation considering the discrete and continuous versions, partial K-center problems, and their min-sum-K-radii variants. In dimension three (or upper), this induces NP-hard complexities. In the planar case, common optimality property is proven: non-nested optimal solutions exist. This induces a common dynamic programming algorithm running in polynomi

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BAREQUET, GILL, and SARIEL HAR-PELED. "POLYGON CONTAINMENT AND TRANSLATIONAL IN-HAUSDORFF-DISTANCE BETWEEN SEGMENT SETS ARE 3SUM-HARD." International Journal of Computational Geometry & Applications 11, no. 04 (2001): 465–74. http://dx.doi.org/10.1142/s0218195901000596.

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The 3SUM problem represents a class of problems conjectured to require Ω(n2) time to solve, where n is the size of the input. Given two polygons P and Q in the plane, we show that some variants of the decision problem, whether there exists a transformation of P that makes it contained in Q, are 3SUM-hard. In the first variant P and Q are any simple polygons and the allowed transformations are translations only; in the second and third variants both polygons are convex and we allow either rotations only or any rigid motion. We also show that finding the translation in the plane that minimizes t

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3

Eskandari, Marzieh, Bhavika B. Khare, Nirman Kumar, and Bahram Sadeghi Bigham. "Red–Blue k-Center Clustering with Distance Constraints." Mathematics 11, no. 3 (2023): 748. http://dx.doi.org/10.3390/math11030748.

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We consider a variant of the k-center clustering problem in IRd, where the centers can be divided into two subsets—one, the red centers of size p, and the other, the blue centers of size q, such that p+q=k, and each red center and each blue center must be a distance of at least some given α≥0 apart. The aim is to minimize the covering radius. We provide a bi-criteria approximation algorithm for the problem and a polynomial time algorithm for the constrained problem where all centers must lie on a given line ℓ. Additionally, we present a polynomial time algorithm for the case where only the ori

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4

Eskandari, Marzieh, Bhavika B. Khare, Nirman Kumar, and Bigham Bahram Sadeghi. "Red–Blue k-Center Clustering with Distance Constraints." Mathematics 11, no. 3 (2024): 748. https://doi.org/10.3390/math11030748.

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We consider a variant of the <em>k</em>-center clustering problem in IRd, where the centers can be divided into two subsets—one, the red centers of size <em>p</em>, and the other, the blue centers of size <em>q</em>, such that p+q=k, and each red center and each blue center must be a distance of at least some given α≥0 apart. The aim is to minimize the covering radius. We provide a bi-criteria approximation algorithm for the problem and a polynomial time algorithm for the constrained problem where all centers must lie on a given line <em>ℓ</em>. Additionally,

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5

Andrei, Ionica. "Existence Theorems for Some Classes of Boundary Value Problems Involving the P(X)-Laplacian." Nonlinear Analysis: Modelling and Control 13, no. 2 (2008): 145–58. http://dx.doi.org/10.15388/na.2008.13.2.14575.

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We prove an alternative for a nonlinear eigenvalue problem involving the p(x)-Laplacian and study a subcritical boundary value problem for the same operator. The theoretical approach is the Mountain Pass Lemma and one of its variants, which is very useful in the study of eigenvalue problems.

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Wen, Fayuan, Angela Rock, Juan Salomon-Andonie, et al. "Genome Wide Association Analysis of Iron Overload in the Trans-Omics for Precision Medicine (TOPMed) Sickle Cell Disease Cohorts." Blood 136, Supplement 1 (2020): 52. http://dx.doi.org/10.1182/blood-2020-142809.

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Introduction: Transfusional iron (Fe) overload is a significant problem among patients with chronic, transfusion-dependent anemias. Iron overload is an important problem in pediatric sickle cell disease (SCD) patients on chronic transfusion regimens predominantly for primary and secondary prevention of stroke. Coexistent hereditary iron overload conditions contribute to the iron overload phenotype in SCD. For example, the Q248H mutation (rs11568350) in SLC40A1, which encodes ferroportin (FPN), is associated with a mild tendency to increase serum ferritin in the general population and with incr

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Arya, Akschat, Boominathan Perumal, and Santhi Krishnan. "Parallelized solution to the asymmetric travelling salesman problem using central processing unit acceleration." Indonesian Journal of Electrical Engineering and Computer Science 25, no. 3 (2022): 1795. http://dx.doi.org/10.11591/ijeecs.v25.i3.pp1795-1802.

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<p><span>Travelling salesman problem is a well researched problem in computer science and has many practical applications. It is classified as a NP-hard problem as its exact solution can only be obtained in exponential time unless P = NP. There are different variants of the travelling salesman problem (TSP) and in this paper, asymmetric travelling salesman problem is addressed since this variant is quite often observed in real world scenarios. There are a number of heuristic approaches to this problem which provides approximate solutions in polynomial time, however this paper propo

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8

Păun, Gheorghe. "One More Universality Result for P Systems with Objects on Membranes." International Journal of Computers Communications & Control 1, no. 1 (2006): 25. http://dx.doi.org/10.15837/ijccc.2006.1.2269.

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<p>We continue here the attempt to bridge brane calculi with membrane computing, following the investigation started in [2]. Specifically, we consider P systems with objects placed on membranes, and processed by membrane operations. The operations used in this paper are membrane creation (cre), and membrane dissolution (dis), defined in a way which reminds the operations pino, exo from a brane calculus from [1]. For P systems based on these operations we prove the universality, for one of the two possible variants of the operations; for the other variant the problem remains open.</p&g

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9

SEITBEKOVA, А., and А. AMIRBEKOVA. "PHONETIC VARIANTS OF LOANWORDS." Iasaýı ýnıversıtetіnіń habarshysy 125, no. 3 (2022): 37–47. http://dx.doi.org/10.47526/2022-3/2664-0686.03.

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Unification of different spelling of words is one of the most important problem in Kazakh linguistics. Especially noticeable is the number of words that occur in different spelling variants, in loanwords from Arabic and Persian origin. The heterogeneity and diversity of the spelling of borrowed words in the practice of writing remains an unsolved problem among linguists. In this regard, the purpose of our study is to identify the reasons for the use of Arabic, Persian words that are written in different versions of the same meaning, and an attempt to designate the main variant when switching t

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Aksenova, Irina Vasil’evna, Yuliya Igorevna Naumova, and Vladimir Valentinovich Gridyushko. "Perspectives of the contemporary usage of circular locomotive depot buildings." Vestnik MGSU, no. 2 (February 2016): 9–19. http://dx.doi.org/10.22227/1997-0935.2016.2.9-19.

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Variants of reshaping the objects of the industrial heritage, including the buildings of transport infrastructure located in central districts of historical towns are analyzed in the article. The evolution of the development of depots for maintaining and repairing the locomotives is represented. The uniqueness of the complex of buildings of Nikolaevskaya Railway in Moscow, an integrated historical and architectural ensemble, is noted. At the present moment one of few preserved buildings is a circular depot in the center of Moscow. The loss of this unique specimen of industrial architecture of

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Adamuthe, Amol C., and Smita M. Kagwade. "Hybrid and adaptive harmony search algorithm for optimizing energy efficiency in VMP problem in cloud environment." Decision Science Letters 11, no. 2 (2022): 113–26. http://dx.doi.org/10.5267/j.dsl.2022.1.001.

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Data Center energy usage has risen dramatically because of the rapid growth and demand for cloud computing. This excessive energy usage is a challenge from an economic and environmental point. Virtual Machine Placement (VMP) along with virtualization technologies is widely used to manage power utilization in data centers. The assignment of virtual machines to physical machines affects energy consumption. VMP is a process of mapping VMs onto a set of PMs in a data center to minimize total power consumption and maximize resource utilization. The VMP is an NP-hard problem due to its constraints a

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12

Ozsoy, Filiz, Ayse F. Nursal, Nevin Karakus, Meral O. Demir, and Serbulent Yigit. "Estrogen Receptor 1 Gene rs22346939 and rs9340799 Variants are Associated with Major Depressive Disorder and its Clinical Features." Current Neurovascular Research 18, no. 1 (2021): 12–19. http://dx.doi.org/10.2174/1567202618666210531122239.

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Objective: Major Depressive Disorder (MDD) is a major health problem worldwide. Estrogen interacts with the central nervous system and has been shown to affect anxiety and depressive behavior. Estrogen mediates its effects by connecting its receptors, estrogen receptors 1 and 2. The purpose of this case-control study was to clarify the association between MDD risk and estrogen receptor 1 (ESR1) gene variants. Methods: This study included 245 individuals (125 MDD patients and 120 healthy controls). Polymerase Chain Reaction (PCR) and Restriction Fragment Length Polymorphism (RFLP) technics were

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13

Lu, Chun, and Xingyi Zhang. "Solving Vertex Cover Problem by Means of Tissue P Systems with Cell Separation." International Journal of Computers Communications & Control 5, no. 4 (2010): 540. http://dx.doi.org/10.15837/ijccc.2010.4.2512.

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Tissue P systems is a computing model in the framework of membrane computing inspired from intercellular communication and cooperation between neurons. Many different variants of this model have been proposed. One of the most important models is known as tissue P systems with cell separation. This model has the ability of generating an exponential amount of workspace in linear time, thus it allows us to design cellular solutions to NP-complete problems in polynomial time. In this paper, we present a solution to the Vertex Cover problem via a family of such devices. This is the first solution t

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14

Akschat, Arya1, Perumal2 Boominathan, and Krishnan3 Santhi. "Parallelized solution to the asymmetric travelling salesman problem using central processing unit acceleration." Indonesian Journal of Electrical Engineering and Computer Science 25, no. 3 (2022): 1795–802. https://doi.org/10.11591/ijeecs.v25.i3.pp1795-1802.

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Travelling salesman problem is a well researched problem in computer science and has many practical applications. It is classified as a NP-hard problem as its exact solution can only be obtained in exponential time unless P = NP. There are different variants of the travelling salesman problem (TSP) and in this paper, asymmetric travelling salesman problem is addressed since this variant is quite often observed in real world scenarios. There are a number of heuristic approaches to this problem which provides approximate solutions in polynomial time, however this paper proposes an exact optimal

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15

Hu, Zhongbo, Shengwu Xiong, Xiuhua Wang, Qinghua Su, Mianfang Liu, and Zhong Chen. "Subspace Clustering Mutation Operator for Developing Convergent Differential Evolution Algorithm." Mathematical Problems in Engineering 2014 (2014): 1–18. http://dx.doi.org/10.1155/2014/154626.

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Many researches have identified that differential evolution algorithm (DE) is one of the most powerful stochastic real-parameter algorithms for global optimization problems. However, a stagnation problem still exists in DE variants. In order to overcome the disadvantage, two improvement ideas have gradually appeared recently. One is to combine multiple mutation operators for balancing the exploration and exploitation ability. The other is to develop convergent DE variants in theory for decreasing the occurrence probability of the stagnation. Given that, this paper proposes a subspace clusterin

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16

Etemad, Roghayeh, and Behrooz Alizadeh. "Some variants of reverse selective center location problem on trees under the Chebyshev and Hamming norms." Yugoslav Journal of Operations Research 27, no. 3 (2017): 367–84. http://dx.doi.org/10.2298/yjor160317012e.

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This paper is concerned with two variants of the reverse selective center location problems on tree graphs under the Hamming and Chebyshev cost norms in which the customers are existing on a selective subset of the vertices of the underlying tree. The first model aims to modify the edge lengths within a given modification budget until a prespecified facility location becomes as close as possible to the customer points. However, the other model wishes to change the edge lengths at the minimum total cost so that the distances between the prespecified facility and the customers satisfy a given up

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17

Alfiyah, Fifi, and Yunita Dyah Puspita Santik. "Perilaku Kepatuhan Masyarakat dalam Menerapkan Protokol Kesehatan Covid-19." Indonesian Journal of Public Health and Nutrition 3, no. 1 (2023): 29–39. http://dx.doi.org/10.15294/ijphn.v3i1.58130.

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Background: The Covid-19 pandemic in Indonesia is a health problem that has not yet ended. Covid-19 cases in Indonesia on 31 May 2022 were 6.054.973 cases. Indonesia ministry of Health informed that SARS-CoV-2 continues to mutate to form new variants. Therefore, efforts are needed to prevent the transmission of Covid-19 through the implementation of the Covid-19 health protocol. The purpose of this studi was to determine the factors related to community adherence in implementing the Covid-19 health protocol in the Karangsari Healthcare Center, Cirebon Regency. Method: This type of research use

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18

Luévanos-Rojas, Arnulfo, Victor Manuel Moreno-Landeros, Griselda Santiago-Hurtado, et al. "Mathematical Modeling for the Optimal Cost Design of Circular Isolated Footings with Eccentric Column." Mathematics 12, no. 5 (2024): 733. http://dx.doi.org/10.3390/math12050733.

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This article shows a model for the design of circular isolated footings and the column placed anywhere in the footing under minimum cost criteria. Some designs for obtaining the diameter, effective depth, and steel areas of the footing under biaxial bending assume the maximum and uniform pressure at the bottom of the footing supported on elastic soils. All these works consider the column placed at the center of the footing. Three numerical problems are given (each problem presents four variants) to determine the lowest cost to design the circular footings under biaxial bending. Problem 1: Colu

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Wojtas, Krzysztof, and Piotr Faliszewski. "Possible Winners in Noisy Elections." Proceedings of the AAAI Conference on Artificial Intelligence 26, no. 1 (2021): 1499–505. http://dx.doi.org/10.1609/aaai.v26i1.8255.

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We consider the problem of predicting winners in elections given complete knowledge about all possible candidates, all possible voters (together with their preferences), but in the case where it is uncertain either which candidates exactly register for the election or which voters cast their votes. Under reasonable assumptions our problems reduce to counting variants of election control problems. We either give polynomial-time algorithms or prove #P-completeness results for counting variants of control by adding/deleting candidates/voters for Plurality, k-Approval, Approval, Condorcet, and Max

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Pronnikova, T. I., and M. N. Rasskazova. "OPTIMIZATION OF BUSINESS PROCESSES OF CUSTOMER SERVICE IN A MULTI-FUNCTIONAL CENTER BASED ON SIMULATION MODELING." Applied Mathematics and Fundamental Informatics 9, no. 2 (2022): 39–49. http://dx.doi.org/10.25206/2311-4908-2022-9-2-39-49.

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This article discusses the problem of building a simulation model of customer service in a multifunctional center providing public and municipal services to optimize business processes. The logical scheme of the simulation model based on UML-diagrams has been developed. A 3D model of customer location and service at the multifunctional center has been created. Experiments have been conducted for different variants of queuing. Proposals for optimizing the work has been developed. The software AnyLogic was used as an implementation tool.

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Yıldırım, Ümit, and Yusuf Kuvvetli. "Solution of capacitated vehicle routing problem with invasive weed and hybrid algorithms." International Journal of Industrial Engineering Computations 12, no. 4 (2021): 441–56. http://dx.doi.org/10.5267/j.ijiec.2021.4.002.

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The vehicle routing problem is widespread in terms of optimization, which is known as being NP-Hard. In this study, the vehicle routing problem with capacity constraints is solved using cost- and time-efficient metaheuristic methods: an invasive weed optimization algorithm, genetic algorithm, savings algorithm, and hybridized variants. These algorithms are tested using known problem sets in the literature. Twenty-four instances evaluate the performance of algorithms from P and five instances from the CMT data set group. The invasive weed algorithm and its hybrid variant with savings and geneti

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Alhazov, Artiom, Rudolf Freund, and Sergiu Ivanov. "When catalytic P systems with one catalyst can be computationally complete." Journal of Membrane Computing 3, no. 3 (2021): 170–81. http://dx.doi.org/10.1007/s41965-021-00079-x.

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AbstractCatalytic P systems are among the first variants of membrane systems ever considered in this area. This variant of systems also features some prominent computational complexity questions, and in particular the problem of using only one catalyst in the whole system: is one catalyst enough to allow for generating all recursively enumerable sets of multisets? Several additional ingredients have been shown to be sufficient for obtaining computational completeness even with only one catalyst. In this paper, we show that one catalyst is sufficient for obtaining computational completeness if

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23

Фролов, Виктор Петрович, та Дмитрий Васильевич Клименко. "АВІАЦІЙНЕ ТРАНСПОРТУВАННЯ РІДИННИХ РАКЕТ-НОСІЇВ". Aerospace Technic and Technology, № 2 (25 березня 2017): 22–25. http://dx.doi.org/10.32620/aktt.2017.2.02.

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This paper concerns the problem of liquid propellant launch vehicles delivery to the launch center. The variants of launch vehicles transportation using rail, road and air transport were considered. The key problems of transportation using the aircrafts, such as overloads applied to the launch vehicle attake off and landing, variation of temperature inside the aircraft cargo compartment, difference in pressure inside the launch vehicle propellant tank sand aircraft cargo compartment, were studied. As a result the proposals for avoiding such problems at transportation using aircraft were stated

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Zhbannikov, Ilya, Konstantin Arbeev, Olivia Bagley, et al. "Using Threshold Regression as an Approach to Incorporate Informative Missingness in Long Life Family Study Data." Innovation in Aging 5, Supplement_1 (2021): 668. http://dx.doi.org/10.1093/geroni/igab046.2520.

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Abstract Genetics of aging is important since aging is a major risk factor in most diseases. Variables describing physiological state and cognitive functioning that influence morbidity and mortality risks can serve as biomarkers of aging. They change with increasing age and the ways in which these variables change can also influence these risks. Missing data due to dropout or death create problems in longitudinal studies producing biased results especially if the gap between exams is relatively long, as is the case in the Long Life Family Study (LLFS). We applied the threshold regression model

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Arfat, Yasir, Muhammad Aqeel Ahmad Khan, Poom Kumam, Wiyada Kumam, and Kanokwan Sitthithakerngkiet. "Iterative solutions via some variants of extragradient approximants in Hilbert spaces." AIMS Mathematics 7, no. 8 (2022): 13910–26. http://dx.doi.org/10.3934/math.2022768.

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<abstract><p>This paper provides iterative solutions, via some variants of the extragradient approximants, associated with the pseudomonotone equilibrium problem (EP) and the fixed point problem (FPP) for a finite family of $ \eta $-demimetric operators in Hilbert spaces. The classical extragradient algorithm is embedded with the inertial extrapolation technique, the parallel hybrid projection technique and the Halpern iterative methods for the variants. The analysis of the approximants is performed under suitable set of constraints and supported with an appropriate numerical exper

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Zhao, Yan Ling, and Su Chang Ma. "Research on the Flexible Product Platform Technology of Machining Center." Advanced Materials Research 842 (November 2013): 596–601. http://dx.doi.org/10.4028/www.scientific.net/amr.842.596.

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As the main production equipment in the machinery industry, machining center (MC) market is active, it is urgent to enhance its development and design ability. Product platform can be a good solution to this problem. In the constructing process, market segmentation grid of MC was created firstly, variants and part of future uncertainties were identified at the same time. Then the unknown uncertainties related to customer needs were analyzed to find out the key design parameters. Through the mapping between the parameters and structure, the critical flexible modules were determined. Finally, th

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27

Cahyaningrum, Ika, and Errick Endra Cita. "Pengendalian Tekanan Darah dengan Black Garlic Varian Bawang Lanang pada Pasien Hipertensi." Jurnal Akademika Baiturrahim Jambi 11, no. 2 (2022): 321. http://dx.doi.org/10.36565/jab.v11i2.581.

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Cardiovascular disease is a major health problem in the world. Hypertension is one of the most common cardiovascular diseases. Efforts to control and treat hypertension are very important so as not to cause complications. Hypertension control can be done with pharmacological and non-pharmacological therapy. One of the non-pharmacological therapies is black garlic therapy with solo garlic variant. The type of research used is pre experimental with a one-group pretest and post-test design. Researchers analyzed the respondents' blood pressure before and after being given black garlic variant solo

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28

Ryu, Justine, Sean J. Jurgens, Satoshi Koyama, et al. "Use of Large-Scale Genomic Datasets to Identify Additional Modifiers of Thrombosis Risk Among 26,436 Carriers of the Factor V Leiden and Prothrombin G20210A Mutations." Blood 144, Supplement 1 (2024): 18. https://doi.org/10.1182/blood-2024-207841.

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Introduction Individuals with the factor V Leiden (FVL, rs6025) and prothrombin G20210A (PTGM, rs1799963) mutations experience a significantly increased risk of venous thromboembolism (VTE). Nevertheless, most carriers never develop VTE. The identity of additional genetic modifiers in this population remains a major unanswered question in the field, and investigators have long hypothesized that genetic differences in both the rare and common variant space contribute to overall risk. To date, addressing this problem has proven extremely challenging due to the lack of sufficiently large cohorts

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29

Feldman, Arthur M., Lilin She, Dennis M. McNamara, et al. "Genetic Variants Are Not Associated with Outcome in Patients with Coronary Artery Disease and Left Ventricular Dysfunction: Results of the Genetic Substudy of the Surgical Treatment for Ischemic Heart Failure (STICH) Trials." Cardiology 130, no. 2 (2015): 69–81. http://dx.doi.org/10.1159/000368221.

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Objectives and Background: We evaluated the ability of 23 genetic variants to provide prognostic information in patients enrolled in the Genetic Substudy of the Surgical Treatment for Ischemic Heart Failure (STICH) trials. Methods: Patients assigned to STICH Hypothesis 1 were randomized to medical therapy with or without coronary artery bypass grafting (CABG). Those assigned to STICH Hypothesis 2 were randomized to CABG or CABG with left ventricular reconstruction. Results: In patients assigned to STICH Hypothesis 2 (n = 714), no genetic variant met the prespecified Bonferroni-adjusted thresho

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Alhazov, Artiom, Rudolf Freund, Sergiu Ivanov, and Sergey Verlan. "Variants of derivation modes for which catalytic P systems with one catalyst are computationally complete." Journal of Membrane Computing 3, no. 4 (2021): 233–45. http://dx.doi.org/10.1007/s41965-021-00085-z.

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AbstractCatalytic P systems are among the first variants of membrane systems ever considered in this area. This variant of systems also features some prominent computational complexity questions, and in particular the problem of using only one catalyst: is one catalyst enough to allow for generating all recursively enumerable sets of multisets? Several additional ingredients have been shown to be sufficient for obtaining even computational completeness with only one catalyst. Last year we could show that the derivation mode $$max_{objects}$$ m a x objects , where we only take those multisets o

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Kundzer, A. V. "Recommendations on the management of patients with axial spondyloarthritis." Proceedings of the National Academy of Sciences of Belarus, Medical series 16, no. 1 (2019): 117–28. http://dx.doi.org/10.29235/1814-6023-2019-16-1-117-128.

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Spondyloarthritis is a group of diseases characterized by a primarily chronic, progressive inﬂammatory process with the affection of the axial skeleton (spine and sacroiliac joints) and peripheral joints having some common etiopathogenetic and clinical signs. The modern concept of spondyloarthritis involves the isolation of predominantly axial and predominantly peripheral variants of the disease. The problem of spondyloarthritis is in the center of attention of the medical community. Studies of the leading rheumatological centers are devoted to the aspects of the onset and development of the d

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Tipka, Martin, Tadeáš Maceček, and Jitka Vašková. "Analysis of Position Effect of Vertical Load-Bearing Elements for Reinforcement of Steel Reinforced Concrete Floor Structures." Key Engineering Materials 976 (March 18, 2024): 11–20. http://dx.doi.org/10.4028/p-jmrgs4.

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The paper deals with the problem of stress in the connection detail of vertical supporting structures with a flat slab and possible methods for its analysis. It mainly focuses on the problem of non-axial connection of columns and walls, which is typical for today's architectural designs. The parametric study compares the effect of the distance of the connected vertical support structures on reinforcement in the discontinuity region. Three different computational methods are used to stress analysis of this region - linear Finite Elements Method in SCIA Engineer software, 2D Strut-and-Tie Model

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ШВЕДЧИКОВА, І. О., and Ю. А. РОМАНЧЕНКО. "Research of influence of working area geometric dimensions on spatial distribution of magnetic field inside the matrix of a polygradient separator." Journal of Electrical and power engineering 14, no. 1 (2020): 13–20. http://dx.doi.org/10.31474/2074-2630-2020-1-13-20.

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The possibility of application of the Infolytica software package to solve the main tasks of work is substantiated. The computer 3D-model of electromagnetic separator was verified by solving of test problem. Comparison of results of magnetic induction research for characteristic points obtained during 3D modeling of electromagnetic separator with data obtained during experimental research showed a fairly high consistency. An analysis of geometric dimensions influence on distribution of magnetic field in a polygradient matrix was carried out for a random sampling containing three structural var

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Martínez-del-Amor, Miguel Ángel, David Orellana-Martín, Ignacio Pérez-Hurtado, Francis George C. Cabarle, and Henry N. Adorna. "Simulation of Spiking Neural P Systems with Sparse Matrix-Vector Operations." Processes 9, no. 4 (2021): 690. http://dx.doi.org/10.3390/pr9040690.

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To date, parallel simulation algorithms for spiking neural P (SNP) systems are based on a matrix representation. This way, the simulation is implemented with linear algebra operations, which can be easily parallelized on high performance computing platforms such as GPUs. Although it has been convenient for the first generation of GPU-based simulators, such as CuSNP, there are some bottlenecks to sort out. For example, the proposed matrix representations of SNP systems lead to very sparse matrices, where the majority of values are zero. It is known that sparse matrices can compromise the perfor

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Varfolomeeva, A. V., A. G. Tishchenko, and Y. I. Alexandrov. "Variants of Mutual Coordination of Individuals with Similar and Different Psychological Characteristics." Experimental Psychology (Russia) 17, no. 2 (2024): 84–97. http://dx.doi.org/10.17759/exppsy.2024170205.

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<p>The article considers the problem of coordination of individual experience in the situation when individuals achieve a collective result. In terms of the system-evolutionary approach, such coordination is described as mutual-co-operation. The aim of the study was to evaluate possible variants of individual experience coordination in the conditions of joint solution of textual tasks (in dyads). Analytical logical ("Knights and Liars", "Grid-logic") and holistic ("Anagrams", "Moral Judgements") textual problems were used. Two criteria for distinguishing dyads were tested: 1. "Analytic-H

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Shmatov M. L. "On the problem of acceleration of fast ignition thermonuclear targets with two cones." Technical Physics 92, no. 5 (2022): 578. http://dx.doi.org/10.21883/tp.2022.05.53673.137-21.

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The problems of acceleration of fast ignition thermonuclear targets with two cones for their high-precision injection into region near the center of the reactor chamber are considered and the possibility of solution of these problems is shown. A brief review of discussed variants of such targets and of their main advantages, related to ignition of microexplosion and simplicity of providing preservation of targets workability during their flight in the reactor chamber, is presented. Fast ignition by microexplosion of two-sided cone target and the method to estimate acceptable speed of stabilizi

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Shnayder, Natalia A., Violetta V. Grechkina, Vera V. Trefilova, et al. "Ethnic Aspects of Valproic Acid P-Oxidation." Biomedicines 12, no. 5 (2024): 1036. http://dx.doi.org/10.3390/biomedicines12051036.

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The safety of the use of psychotropic drugs, widely used in neurological and psychiatric practice, is an urgent problem in personalized medicine. This narrative review demonstrated the variability in allelic frequencies of low-functioning and non-functional single nucleotide variants in genes encoding key isoenzymes of valproic acid β-oxidation in the liver across different ethnic/racial groups. The sensitivity and specificity of pharmacogenetic testing panels for predicting the rate of metabolism of valproic acid by P-oxidation can be increased by prioritizing the inclusion of the most common

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Vasumathi, D., and Thangavelu S. "Scalarizing functions in solving multi-objective problem-an evolutionary approach." Indonesian Journal of Electrical Engineering and Computer Science 13, no. 3 (2019): 974. http://dx.doi.org/10.11591/ijeecs.v13.i3.pp974-981.

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<p><span>Scalarizing functions had long been observed for optimization of multi-objective problems. Scalarizing functions on multi-objective problem along with Differential Evolution (DE) algorithm variants had been used to analyze the effect of scalarizing functions. The main purpose is to find the better scalarizing function which can be applied for optimization. The effective solution of the multi-objective problem depends on the various factors like the DE algorithm and the scalarizing functions used. Multi objective evolutionary algorithm (MOEA) framework in java had been used

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Alay, Tarık, İbrahim Demir, and Murat Kirisci. "Modified Hard Voting Classifier Implementation on MEFV Gene Variants Increases in Silico Tool Performance: A Novel Approach for Small Sample Size." Journal of Intelligent Systems: Theory and Applications 8, no. 1 (2025): 35–46. https://doi.org/10.38016/jista.1501164.

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Objective: There are a limited number of pathogenic variants known in the MEFV gene. In silico tools fail to classify many MEFV gene variants. Therefore, it is essential to implement novel approaches. Our goal is to develop a new strategy to solve the even number classification problem while improving MEFV gene variant prediction accuracy using small datasets. Material - methods: First, we determined the optimal number of computational tools for the model. We then applied eight distinct ML algorithms on the training dataset containing MEFV gene variants using the determined tools. We initiated

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Fekete, Sándor P., Andreas Haas, Phillip Keldenich, Michael Perk, and Arne Schmidt. "Computing Area-Optimal Simple Polygonizations." ACM Journal of Experimental Algorithmics 27 (December 31, 2022): 1–23. http://dx.doi.org/10.1145/3503607.

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We consider methods for finding a simple polygon of minimum ( Min-Area ) or maximum ( Max-Area ) possible area for a given set of points in the plane. Both problems are known to be NP-hard; at the center of the recent CG Challenge, practical methods have received considerable attention. However, previous methods focused on heuristic methods, with no proof of optimality. We develop exact methods, based on a combination of geometry and integer programming. As a result, we are able to solve instances of up to \( n=25 \) points to provable optimality. While this extends the range of solvable insta

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Kuhn, Jens H., Kristian G. Andersen, Yīmíng Bào, et al. "Filovirus RefSeq Entries: Evaluation and Selection of Filovirus Type Variants, Type Sequences, and Names." Viruses 6, no. 9 (2014): 3663–82. https://doi.org/10.5281/zenodo.13530339.

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(Uploaded by Plazi for the Bat Literature Project) Sequence determination of complete or coding-complete genomes of viruses is becoming common practice for supporting the work of epidemiologists, ecologists, virologists, and taxonomists. Sequencing duration and costs are rapidly decreasing, sequencing hardware is under modification for use by non-experts, and software is constantly being improved to simplify sequence data management and analysis. Thus, analysis of virus disease outbreaks on the molecular level is now feasible, including characterization of the evolution of individual virus pop

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Kuhn, Jens H., Kristian G. Andersen, Yīmíng Bào, et al. "Filovirus RefSeq Entries: Evaluation and Selection of Filovirus Type Variants, Type Sequences, and Names." Viruses 6, no. 9 (2014): 3663–82. https://doi.org/10.5281/zenodo.13530339.

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(Uploaded by Plazi for the Bat Literature Project) Sequence determination of complete or coding-complete genomes of viruses is becoming common practice for supporting the work of epidemiologists, ecologists, virologists, and taxonomists. Sequencing duration and costs are rapidly decreasing, sequencing hardware is under modification for use by non-experts, and software is constantly being improved to simplify sequence data management and analysis. Thus, analysis of virus disease outbreaks on the molecular level is now feasible, including characterization of the evolution of individual virus pop

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Murashkina, O. V. "On the problem of diatopic variation of the Spanish language in the dialect subsystems of Latin American countries." Language and Text 12, no. 2 (2025): 52–61. https://doi.org/10.17759/langt.2025120205.

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<p>The article examines the inventory phonological system of Spanish consonantism and its phonetic realizations in dialect subsystems of modern Spanish. Substrate-superstrate linguistic relations in Latin American countries determine the variable nature of the implementation of the standardized norm of the Spanish language in Spanish-speaking America. The national dialectal norm of the Spanish language in these countries has characteristics that differ from the Iberian norm. Bearing in mind that all Latin American varieties of Spanish belong to a single linguistic standardized model of t

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Polyakova, Natalia M. "Initial Boundary Value Problem of the Flow in a Blood Vessel." UNIVERSITY NEWS. NORTH-CAUCASIAN REGION. NATURAL SCIENCES SERIES, no. 4-1 (216-1) (December 28, 2022): 42–54. http://dx.doi.org/10.18522/1026-2237-2022-4-1-42-54.

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The solution of the initial boundary value problem for a system of two quasi-linear hyperbolic equations, which describes a rotationally symmetric vortex-free flow of a viscous incompressible fluid in an infinite cylindrical domain (pipe, blood vessel) is constructed. It is assumed that the side surface of the domain is a free (soft, compliant) boundary on which the kinematic condition is set. The dynamic condition at the boundary is modeled by some constitutive relation – the dependence of the pressure P on the cross-sectional area S of the cylindrical domain. To study the flow an asymptotic

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Rojas-Diaz, Jose Manuel, Marianela Zambrano-Román, Jorge Ramón Padilla-Gutiérrez, Yeminia Valle, José Francisco Muñoz-Valle, and Emmanuel Valdés-Alvarado. "Association of CTLA-4 (AT)n Variants in Basal Cell Carcinoma and Squamous Cell Carcinoma Patients from Western Mexico." Current Issues in Molecular Biology 46, no. 8 (2024): 8368–75. http://dx.doi.org/10.3390/cimb46080493.

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The incidence of basal cell carcinoma (BCC) and squamous cell carcinoma (SCC) is constantly increasing, becoming a significant health problem. CTLA-4 is a critical immune checkpoint, and it has been suggested that a variant of variable-number tandem repeat in the 3’-UTR of its gene, known as (AT)n, may be associated with a higher susceptibility to some cancers; however, little is known about genetic variants of the CTLA-4 gene in NMSC. To establish the association of this genetic variant in the CTLA-4 gene with the susceptibility of NMSC carcinogenesis in the Western Mexican population, sample

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Li, Juan, Dan-dan Xiao, Hong Lei, Ting Zhang, and Tian Tian. "Using Cuckoo Search Algorithm with Q-Learning and Genetic Operation to Solve the Problem of Logistics Distribution Center Location." Mathematics 8, no. 2 (2020): 149. http://dx.doi.org/10.3390/math8020149.

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Cuckoo search (CS) algorithm is a novel swarm intelligence optimization algorithm, which is successfully applied to solve some optimization problems. However, it has some disadvantages, as it is easily trapped in local optimal solutions. Therefore, in this work, a new CS extension with Q-Learning step size and genetic operator, namely dynamic step size cuckoo search algorithm (DMQL-CS), is proposed. Step size control strategy is considered as action in DMQL-CS algorithm, which is used to examine the individual multi-step evolution effect and learn the individual optimal step size by calculatin

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SHALKEVICH, L. V., A. K. STASHKOV, and A. N. YAKOVLEV. "THE PROBLEM OF PAIN SYNDROME IN CHILDREN WITH CEREBRAL PALSY." MODERN PERINATAL MEDICAL TECHNOLOGIES IN SOLVING THE PROBLEM OF DEMOGRAPHIC SECURITY, no. 17 (December 2024): 382–88. https://doi.org/10.63030/2307-4795/2024.17.p.28.

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Cerebral palsy in children is the symptom complex of non-progressive motor disorders, which are based on structure damage of the central nervous system in the perinatal period. A common concomitant disorder of cerebral palsy is pain syndrome, which in most cases is complex and heterogeneous. Syndrome is represented by the following types of pain: pain associated with increased muscle tone, forced body position and contractures; pain associated with the digestive system; primary and secondary headaches; situationally-caused musculoskeletal pain; pain accompanying by bedsores; functional types o

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Augustyn, Marcin, and Marek Barski. "Numerical and Analytical Determination of the Critical Wind Speed Causing the Overturning of the Top-Slewing Tower Crane." Applied Sciences 15, no. 9 (2025): 4683. https://doi.org/10.3390/app15094683.

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The current study is devoted to the problem of the stability of the top-slewing tower cranes concerning the wind. A sufficiently strong wind can cause the overturning of the whole crane. The critical wind speed varies significantly depending on the geometrical configuration of the crane with respect to the wind direction. At the very beginning, the aerodynamic forces are estimated using CFD simulations. Next, the obtained results are compared with the applicable standards. The critical wind speeds and corresponding jib rotation angles are determined for the following two selected crane configu

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Lin, Min-Sheng. "Counting dominating sets in generalized series-parallel graphs." Discrete Mathematics, Algorithms and Applications 11, no. 06 (2019): 1950074. http://dx.doi.org/10.1142/s1793830919500745.

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Counting dominating sets in a graph is a #P-complete problem even in planar graphs. This paper studies this problem for generalized series-parallel graphs, which are a subclass of planar graphs. This work develops some linear-time algorithms for counting dominating sets and their two variants, independent dominating sets and connected dominating sets in generalized series-parallel graphs.

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Lei, Ting L., and Zhen Lei. "Computerized Proof of Fundamental Properties of the p-Median Problem Using Integer Linear Programming and a Theorem Prover." ISPRS International Journal of Geo-Information 14, no. 4 (2025): 162. https://doi.org/10.3390/ijgi14040162.

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The p-median problem is one of the earliest location-allocation models used in spatial analysis and GIS. It involves locating a set of central facilities (the location decision) and allocating customers to these facilities (the allocation decision) so as to minimize the total transportation cost. It is important not only because of its wide use in spatial analysis but also because of its role as a unifying location model in GIS. A classical way of solving the p-median problem (dating back to the 1970s) is to formulate it as an Integer Linear Program (ILP), and then solve it using off-the-shelf

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