bluuebunny/crossref_metadata_2025_split huggingface dataset:
Seasonal Accumulated Workloads in Collegiate Men's Soccer: A Comparison of Starters and Reserves
Authors: Curtis Ryan M. , Huggins Robert A. , Benjamin Courteney L. , Sekiguchi Yasuki , M. Arent Shawn , C. Armwald Bruin , Pullara Jason M. , West Chris A. , Casa Douglas J. 
Published: August 2019

Abstract
Curtis, RM, Huggins, RA, Benjamin, CL, Sekiguchi, Y, Arent, S, Armwald, B, Pullara, JM, West, CA, and Casa, DJ. Seasonal accumulated workloads in collegiate men's soccer: a comparison of starters and reserves. J Strength Cond Res 35(11): 3184–3189, 2021—The purpose of this investigation was to quantify and compare player's season total-, match-, and training-accumulated workload by player status characteristics (i.e., starter vs. reserve) in American collegiate men's soccer. Global positioning system (GPS) and heart rate (HR)-derived workloads were analyzed from 82 collegiate male soccer athletes from 5 separate teams over the 2016 and 2017 seasons. Differences in total physical and physiological workloads (i.e., total distance, accelerations, and weighted HR-zone training impulse [TRIMP] score) as well as workloads over a range of intensity zones were examined using multilevel mixed models, with mean difference (MD) and effect size (ES) reported. Starters accumulated substantially more total distance (MD = 82 km, ES = 1.23), TRIMP (MD = 2,210 au, ES = 0.63), and total accelerations (MD = 6,324 n, ES = 0.66) over the season. Total accumulated distance in all velocity zones (ES [range] = 0.87–1.08), all accelerations zones (ES [range] = 0.54–0.74), and time spent at 70–90% HRmax (ES [range] = 0.60–1.12) was also greater for starters. Reserves accumulated substantially more total distance (MD = 20 km, ES = 0.43) and TRIMP (MD = 1,683 au, ES = 0.79) during training. Although reserves show elevated physical and physiological loads during training compared with starters, there is an imbalance in overall workloads between player roles, with starters incurring substantially more match and total seasonal workloads. These results indicate managing player workloads in soccer requires attention to potential imbalances between players receiving variable match times. Coaches and practitioners in collegiate men's soccer may consider implementing strategies to reduce discrepancies in loading between starters and reserves. Individualized monitoring of training and match workloads may assist in the implementation of more balanced load management programs.
Dietary Intake and Energy Expenditure During Two Different Phases of Athletic Training in Female Collegiate Lacrosse Players
Authors: Kumahara Hideaki , Ohta Chihiro , Nabeshima Erina , Nakayama Ai , Mine Sayoko , Yamato Takako 
Published: August 2019

Abstract
Kumahara, H, Ohta, C, Nabeshima, E, Nakayama, A, Mine, S, and Yamato, T. Dietary intake and energy expenditure during two different phases of athletic training in female collegiate lacrosse players. J Strength Cond Res 34(6): 1547–1554, 2020—This study aims to investigate the state of nutrient intake and energy expenditure (EE) among various phases of periodization in female collegiate lacrosse players. A total of 17 Japanese female collegiate lacrosse players (age: 20.0 ± 0.9 years) were enrolled in this study. Physical activity (PA) and dietary intake were assessed over each 1-week period during the training preparatory phase (P-phase) and transition phase (T-phase). The exercise training-related EE (EEE) and EE associated with other daily living activities (i.e., nonexercise activity thermogenesis [NEAT]), were measured using accelerometers and heart rate (HR) monitoring using the flex-HR method. The total daily EE during the P-phase was significantly higher than that of the T-phase (2,168 ± 248 vs. 1744 ± 138 kcal·d−1; p < 0.01); however, no significant differences were observed in the total energy intake. Moreover, EEE during the P-phase was significantly higher than that of the T-phase, whereas no significant difference was found in NEAT. Furthermore, no significant differences were noted in any macronutrient intake variable observed between the 2 phases (protein:fat:carbohydrate ratio: 12.6 ± 1.5:32.9 ± 3.9:54.1 ± 5.1% in the P-phase vs. 12.1 ± 1.7:30.7 ± 3.9:55.7 ± 5.2% in the T-phase). The carbohydrate and protein intake were below recommended levels during the P-phase. Conversely, the saturated fatty acid ratio was higher than the dietary goals for disease prevention. Based on the changes in the PA volume observed during different training phases, female collegiate lacrosse players did not attain optimal nutrient intake required for optimal athletic performance and health.
Comparison of Myoelectric Activity During a Suspension-Based and Traditional Split Squat
Authors: Miller William M. , Barnes Jeremy T. , Sofo Seidu S. , Wagganer Jason D. 
Published: August 2019

Abstract
Miller, WM, Barnes, JT, Sofo, SS, and Wagganer, JD. Comparison of myoelectric activity during a suspension-based and traditional split squat. J Strength Cond Res 33(12): 3236–3241, 2019—Over several decades, traditional resistance training has incorporated body-mass suspension training (SPT), for example, Total-Body Resistance Exercise (TRX); however, very little research has been completed investigating the effects of lower body SPT. Therefore, the purpose of this study was to assess sex differences in myoelectric activity via electromyography while performing a stable (i.e., bench) traditional split squat (TSS) compared with suspension body-mass split squat (TRXSS). Nineteen recreationally active individuals (mean ± SD = men: n = 9; 21.4 ± 2.1 years; 177.2 ± 9.0 cm; 84.2 ± 8.8 kg; women: n = 10; 21.5 ± 1.6 years; 160.7 ± 8.5 cm; 59.1 ± 7.9 kg) participated in this investigation. Subjects performed 3 training sessions, 1 familiarization and 2 (one for each variation) split squat. The TRXSS was performed by placing the rear foot within the foot cradle of the strap, while the TSS required placement of the rear foot on a stable bench (40.64 cm). The TRXSS resulted in higher peak and average myoelectric activity overall, as well as greater gluteus maximus myoelectric activity. No gender or rectus femoris myoelectric activity differences were found. The increased myoelectric activity of the gluteus maximus during the TRXSS was most likely due to increased medial/lateral stabilization demands on the suspended leg. These findings provide insight into TRX as a useful exercise modality for recreationally active or rehabilitative purposes.
Comparison of SYNTAX Score I and SYNTAX Score II for Predicting Postoperative Atrial Fibrillation in Patients Undergoing Coronary Artery Bypass Graft Surgery
Authors: Ozturk Semi , Kalyoncuoglu Muhsin , Sahin Mazlum 
Published: August 2019

Background: Atrial fibrillation is a frequent cause of morbidity following coronary artery bypass grafting (CABG). SYNTAX score II (SSII) is associated with outcomes in patients undergoing coronary revascularization. We investigated the relationship between SSII and postoperative atrial fibrillation (POAF) in patients undergoing CABG.
Methods: Records of 461 consecutive patients who underwent elective isolated CABG were retrospectively reviewed. Characteristics of patients with and without POAF were compared.
Results: POAF developed in 51 (11.1%) patients. Patients with POAF were older (61.8 ± 7.8 versus 58.4±7.7; P = .003). Chronic obstructive pulmonary disease (COPD) and history of coronary artery disease (CAD) were more frequent in patients with POAF whereas the frequency of hypertension (HT), diabetes mellitus (DM), and smoking did not differ. CRP was significantly higher in patients with POAF. Left atrial diameter (LAD), EuroSCORE II, SSI and SSII were greater in patients with POAF (P < .001 for all). Age, history of CAD, LAD, SSI, and SSII were independent predictors of POAF in multivariate regression analysis. In ROC analysis, SSII was more accurate than SSI for predicting POAF, albeit statistically insignificant [difference between AUC: 0.0483, 95% CI (-0.0411) - (0.138); z statistic:1.059, P = .29)]. In-hospital MACE (3.2% versus 9.8%, P = .038) and one-year mortality (4.6% versus 13.5%, P = .008) of patients with POAF were significantly higher.
Conclusion: POAF occurred in more than one-tenth of patients undergoing CABG, and it is associated with in-hospital MACE and one-year mortality. Age, history of CAD, LAD, SSI, and SSII are independent predictors of POAF. SSII seems to be more accurate than SSI for predicting POAF.
On the backward bifurcation of a vaccination model with nonlinear incidence
Authors: Buonomo B. , Lacitignola D. 
Published: August 2019

A compartmental epidemic model, introduced by Gumel and Moghadas [1], is considered. The model incorporates a nonlinear incidence rate and an imperfect preventive vaccine given to susceptible individuals. A bifurcation analysis is performed by applying the bifurcation method introduced in [2], which is based on the use of the center manifold theory. Conditions ensuring the occurrence of backward bifurcation are derived. The obtained results are numerically validated and then discussed from both the mathematical and the epidemiological perspective.
Vectorization of human pelvis objects in X-ray images
Authors: Juozapavičius Algimantas , Markauskas Ramūnas 
Published: August 2019

In medical diagnostics visual evaluation of an object or its image is necessary but time consuming operation. Well-known computer vision algorithms or their compilation, or even some new methods should be the right tool in increasing the speed and reliability of this process. This paper introduces situation in this domain and some experiments and their results in extraction of biomechanical parameters of human pelvis from x-ray images using combination of Hough transform for a line, for a circle (arc) and Canny edge detector. The main idea of an algorithm, which was created during this experiment, is to use different levels of noise filter thus making a balance between leaving too much noise and removing too much actual data. The basic steps would be: filter out most of noise and noisy objects using high filter’s threshold value; find sharp and clear objects; narrow the set of possible parameters of noisy objects; apply noise filter with lower threshold value to the original image; find noisy objects. Experiment shows that algorithm works but it needs to be tested on reliability and some bindings with actual biomechanical parameters should be done (see [1–6]).
On a boundary value problem to third order PDE with multiple characteristics
Authors: Apakov Yusufjon P. P. , Rutkauskas Stasys 
Published: August 2019

In the paper the second boundary value problem in a rectangular domain to equation uxxx − uyy = f(x, y) with the multiple characteristics is considered. The considered equation is closely related with nonlinear equation uxxx + uyy −(ν/y)uy = uxuxx, which describes transonic flow of a gas around a revolution bodies. Using the fundamental solutions of corresponding homogeneous equation the Green function of analyzed problem is composed and thereby this problem is solved.
On the numerical solution of chaotic dynamical systems using extend precision floating point arithmetic and very high order numerical methods
Authors: Sarra Scott A. A. , Meador Clyde 
Published: August 2019

Multiple results in the literature exist that indicate that all computed solutions to chaotic dynamical systems are time-step dependent. That is, solutions with small but different time steps will decouple from each other after a certain (small) finite amount of simulation time. When using double precision floating point arithmetic time step independent solutions have been impossible to compute, no matter how accurate the numerical method. Taking the well-known Lorenz equations as an example, we examine the numerical solution of chaotic dynamical systems using very high order methods as well as extended precision floating point number systems. Time step independent solutions are obtained over a finite period of time. However even with a sixteenth order numerical method and with quad-double floating point numbers, there is a limit to this approach.
Unsteady three dimensional flow of couple stress fluid over a stretching surface with chemical reaction
Authors: Hayat Tasawar , Awais Muhammad , Safdar Ambreen , Hendi Awatif A. A. 
Published: August 2019

The unsteady three-dimensional flow of couple stress fluid over a stretched surface is investigated. Analysis has been performed in the presence of mass transfer and chemical reaction. Nonlinear flow analysis is computed by a homotopic approach. Plots are presented and analyzed for the various parameters of interest. A comparative study with existing solutions in a limiting sense is made.
Analysis of equations arising in gyrotron theory
Authors: Cepıtis Janis , Dumbrajs Olgerts , Kalis Harijs , Reinfelds Andrejs , Strautins Uldis 
Published: August 2019

The gyrotron is a microwave source whose operation is based on the stimulated cyclotron radiation of electrons oscillating in a static magnetic field. Powerful gyrotrons can be used to heat nuclear fusion plasma. In addition, they have found a wide utility in plasma diagnostics, plasma chemistry, radars, extra-high-resolution spectroscopy, high-temperature processing of materials, medicine, etc. However, the main application of gyrotrons is in electron cyclotron resonance heating in tokamaks and stellarators. Equations describing gyrotron operation are ordinary differential equations and Schrödinger type partial differential equations. The present paper provides a survey of the analytical and numerical results concerning these equations obtained by our group in the last decade.
Influence of thermal radiation on non-Darcian natural convection in a square cavity filled with fluid saturated porous medium of uniform porosity
Authors: Mahapatra Tapas Ray Ray , Pal Dulal , Mondal Sabyasachi 
Published: August 2019

Influence of thermal radiation on natural-convection flow in a square cavity filled with a porous medium of uniform porosity having isothermal vertical walls and adiabatic horizontal walls, has been studied numerically by using finite-difference method with staggered grid distribution. The simulation is performed by considering both Darcian and non-Darcian models. Governing momentum and energy equations are solved numerically to obtain velocity and temperature fields for various values of different physical parameters. It is seen that increasing the thermal radiation parameter enhances the local Nusselt number on the left vertical wall whereas the reverse effects are observed due to increase in the heat generating parameter when Ra = 109. The temperature at the mid-horizontal plane decreases with increase in the value of Rayleigh number up to a certain distance from the left vertical wall and beyond that distance the opposite trend is observed. The temperature at the mid-horizontal plane increases with increase in the value of heat generating parameter.
Optimal control of an epidemic model with a saturated incidence rate
Authors: Laarabi Hassan , Labriji El Houssine Houssine , Rachik Mostafa , Kaddar Abdelilah 
Published: August 2019

In this study we consider a mathematical model of an SIR epidemic model with a saturated incidence rate. We used the optimal vaccination strategies to minimize the susceptible and infected individuals and to maximize the number of recovered individuals. We work in the nonlinear optimal control framework. The existence result was discussed. A characterization of the optimal control via adjoint variables was established. We obtained an optimality system that we sought to solve numerically by a competitive Gauss–Seidel like implicit difference method.
Exact solutions of the Kudryashov–Sinelshchikov equation and nonlinear telegraph equation via the first integral method
Authors: Mirzazadeh Mohammad , Eslami Mostafa 
Published: August 2019

In this article we find the exact traveling wave solutions of the Kudryashov–Sinelshchikov equation and nonlinear telegraph equation by using the first integral method. This method is based on the theory of commutative algebra. This method can be applied to nonintegrable equations as well as to integrable ones.
Linear and nonlinear stability in nuclear reactors with delayed effects
Authors: Bučys Kostas , Švitra Donatas , Vilkytė Ramunė 
Published: August 2019

The research of a nuclear reactor model has been observed, where the system consists of two differential equations with one delay. A linear analysis has been performed, the asymptotic stability model of the area D0 and D2 has been defined, in which a stable periodic solution of one frequency appears. In the nonlinear analysis the analytical expression of the solution is presented with the help of bifurcation theories. In the numerical experiment using the scientific simulation program “Model Maker” numerical Runge–Kutta IV series method asymptotically stable solution and a stable periodic solution has been received and compared to the stable periodic solution received in nonlinear analysis with the help of bifurcation theories.
Optimal management of a renewable resource utilized by a population with taxation as a control variable
Authors: Dubey Balram , Patra Atasi 
Published: August 2019

A dynamical model is proposed and analyzed to discuss the effect of population on a resource biomass by taking into account the crowding effect. It is assumed that the resource biomass, which has commercial importance, is subjected to harvesting. The harvesting effort is assumed to be a dynamical variable and taxation is being used as a control variable. The optimal harvesting policy is discussed using the Pontryagin’s maximum principle.
Modeling nonlinear stochastic kinetic system and stochastic optimal control of microbial bioconversion process in batch culture
Authors: Wang Lei , Feng Enmin , Xiu Zhilong 
Published: August 2019

In this paper, we analyze a stochastic model representing batch fermentation in the process of glycerol bio-dissimilation to 1,3-propanediol by klebsiella pneumoniae. The stochasticity in the model is introduced by parameter perturbation which is a standard technique in stochastic population modelling. Thus, based on the nonlinear deterministic dynamical system of glycerol bioconversion to 1,3-propanediol in batch culture, we present the stochastic version of the batch fermentation process driven by a five-dimensional Brownian motion and Lipschitz coefficients, which is suitable for the factual fermentation. Subsequently, we study the existence and uniqueness of solutions for the stochastic system as well as the boundedness and Markov property of solutions. Moveover a stochastic optimal control model is constructed and the sufficient and necessary conditions for optimality are proved via dynamic programming principle. Finally we present computer simulation for the stochastic system by using Stochastic Euler–Maruyama scheme. Compared with the results from the deterministic system, numerical results reveal the peculiar role of stochasticity in the dynamical responses of the batch culture.
Soliton solution and conservation laws of the Zakharov equation in plasmas with power law nonlinearity
Authors: Morris Richard , Kara Abdul Hamid Hamid , Biswas Anjan 
Published: August 2019

This paper studies the Zakharov equation with power law nonlinearity. The traveling wave hypothesis is applied to obtain the 1-soliton solution of this equation. The multiplier method from Lie symmetries is subsequently utilized to obtain the conservation laws of the equations. Finally, using the exact 1-soliton solution, the conserved quantities are listed.
Phenomenological model of bacterial aerotaxis with a negative feedback
Authors: Skakauskas Vladas , Katauskis Pranas , Šimkus Remigijus , Ivanauskas Feliksas 
Published: August 2019

A phenomenological model for the suspension of the aerotactic swimming microorganisms placed in a chamber with its upper surface open to air is presented. The model was constructed to embody some complexity of the aerotaxis phenomenon, especially, changes in the average bacteria drift velocity under changing environmental conditions. It was assumed that effective forces applied to the cell (gravitational, drag, and thrust) should be essential for the overall system dynamics; and that bacterial propulsion force, but not their swimming velocity, is proportional to the gradient of the oxygen concentration. Mathematically, the model consists of three coupled equations for the oxygen dynamics; for the cell conservation; and for the balance of forces acting on bacteria. An analytical steady-state solution is given for the shallow and deep layers and numerical results are given for the steady-state and initial value problems which are compared with corresponding ones to the Keller–Segel model.
Multi-objective optimization aided to allocation of vertices in aesthetic drawings of special graphs
Authors: Varoneckas Audrius , Žilinskas Antanas , Žilinskas Julius 
Published: August 2019

A problem of drawing specific graphs is considered emphasizing aesthetic appeal of the visualization. We focus on graphs related to the management of business processes. A particular problem of the aesthetic drawing is considered where the aesthetic allocation of vertices is aimed. The problem is stated as a problem of bi-objective optimization where the objectives are the length of connectors and the compatibility of the sequence flows with the favorable top-down, left-right direction. An algorithm based on the branch-and-bound approach is proposed.
From the Pontifical Faculty of Theology in Krakow to the Pontifical University of John Paul II in Krakow. Part 1: 1954-1982
Authors: Marecki Józef 
Published: August 2019

In 1954, arbitrarily and without consulting with the Catholic Church, the communist authorities transferred the Faculties of Theology of the Jagiellonian University and the University of Warsaw to a new university that they had created without a canonical mandate – the Academy of Catholic Theology in Warsaw. Instead of accepting the Polish communists’ unilateral decision, the Holy See transferred the rights of the Faculty of Theology in Krakow to the Archdiocesan Major Seminary, whose faculty eventually was given the right to have the adjective “Pontifical” in its title. Although it did not have authority from the state, it continued to offer post-secondary education and bestow academic titles upon its graduates. On the basis of this, Pope John Paul II, who as the Archbishop of Krakow was not only officially its great chancellor but also its promoter and special custodian, established the Pontifical Academy of Theology in 1981. This article presents the history of the Pontifical Faculty of Theology in 1954-1982. Its activity in later years as the Pontifical Academy of Theology, which in 2009 became the Pontifical University of John Paul II, will be presented in the second part of this text.