bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on analysis the emotion regulation mechanisms responsible for improvement of sport performance in artistic gymnastics
Authors: Nuț Ramona Ancuța , Apostu Paula , Pop Nicolae Horațiu
Published: June 2019

This study aims to identify mechanisms responsible for the achievements in the artistic gymnastics performance. The main mechanisms we have considered a priori as being mechanisms of change were: anxiety for high performance sport, general self-efficacy, specific self-efficacy in gymnastics, motivation in high performance sport, emotional skills and social skills. Gymnasts from 3 national clubs attended this study. The gymnasts were distributed in 3 lots. The subjects are between 8 and 10 years. Since this study aimed to monitor certain psychological variables and one of the participating group received psychological counseling, before intervention we submitted screening questionnaires related to emotional and behavioral disorders to all groups.

All gymnasts attending the study received questionnaires related to each mechanism monitored both in the beginning and at the end of the emotional development program. During the study the gymnasts were distributed in three lots as follows: the first lot received in addition to classical training methods, an emotional training program and a complex technical training program; the second lot received the same complex technical training program as the first lot; and the third lot did not receive intervention program and the gymnasts were trained following the traditional training program. We have analyzed the results using the procedure described by Weersing, V.R. and Weisz, J.R. [19]: the Efficiency Test, the Specificity of Intervention Test, Mechanisms of Change Test; Mediation Test.
Fabrication and Characterization of Gelatin/Carbon Black–Based Scaffolds for Neural Tissue Engineering Applications
Authors: Gunasekaran Harish , De Acutis Aurora , Montemurro Francesca , De Maria Carmelo , Vozzi Giovanni
Published: June 2019

Neural tissue engineering has recently emerged as an alternative strategy to repair nerve damage and promote nerve regeneration. It involves the fabrication of scaffolds with properties mimicking those of the natural extracellular matrix for guiding a three-dimensional (3D) neural regeneration. These engineered constructs, in addition to mechanical support, should be also capable of providing proper chemical and electrical stimuli for adhesion, migration, and proliferation of the neural cells. In this study, we developed conductive composite hydrogel films based on gelatin and carbon black (CB) as scaffolds for neural tissue engineering applications. The presented hydrogel constructs were fabricated in the form of films using the solvent casting method after dispersing several concentrations of CB in a 5 % (w/v) gelatin solution along with (3-glycidoxypropyl)trimethoxysilane (GPTMS) as the crosslinking agent at a concentration of 1.84 % (v/v). The CB concentrations of 0.3 %, 0.5 %, 0.7 %, and 0.9 % (w/w) with respect to the gelatin amount were chosen. The morphological, compositional, swelling, dissolution, electrical, mechanical, and wettability properties together were characterized as function of CB content and compared with those of pure gelatin-based hydrogel. Results demonstrated that the incorporation of different quantities of CB relatively reduced the water uptake capability of the films and increased the stability in water of the gelatin matrix. Findings from the mechanical tests revealed that composite hydrogels have a lower elastic modulus with respect to the pure gelatin matrix. Moreover, it was found that the incorporation of incremental CB concentrations kept the wettability surface property unchanged while the electrical characterization of the proposed structures showed a reduction of the electrical impedance. Overall, the study suggests that the composite structures could be used as a potential candidate for fabrication of scaffolds for neural regeneration with tunable electrical and mechanical properties by varying the CB concentration in a finite range.
Investigation on Grain Boundary Character Distribution During Dynamic Recrystallization of Austenitic Stainless Steel During Hot Deformation
Authors: Kumar Santosh , Aashranth B. , Samantaray Dipti , Davinci M. Arvinth , Borah Utpal , Bhaduri A. K.
Published: June 2019

The phenomenon of dynamic recrystallization (DRX) is central to the hot working and thermomechanical processing of austenitic stainless steel. This study aims to relate two distinct parameters that influence DRX: the content of interstitial atoms, such as nitrogen, and character of grain boundaries in the steel. 316LN austenitic stainless steel has been subjected to thermomechanical processing at 1,423 K through uniaxial compression at different strain rates. At these, the microstructure is fully recrystallized. The nature, character, and growth of DRX grains are studied using Electron Backscatter Diffraction (EBSD). EBSD is used to determine grain boundary character distribution and the Effective Grain Boundary Energy (EGBE) parameter. The evolution of EGBE and its relation to grain growth are analyzed. The concomitant development of special low-energy boundaries is correlated with the interstitial content in the steel, thus linking interstitial content to EGBE. The correlations so made are tested by examining the corrosion resistance of different boundaries formed at different deformation conditions.
FARKLI FORMÜLASYONLARDA KAHVALTILIK ZAHTER ÜRETİMİ VE BAZI KALİTE ÖZELLİKLERİNİN BELİRLENMESİ
Authors: KÖTEN Mehmet , SATOUF Mustafa
Published: June 2019

Kahvaltılık Zahter ülkemizin Doğu Akdeniz Bölgesinde
özellikle Kilis, Gaziantep ve Hatay çevresinde sabah kahvaltılarında zeytinyağı
ile birlikte tüketilen geleneksel bir kuruyemiş baharat karışımıdır. Bu
çalışmada, kekik bitkisi ve menengiç meyvesinin değişik oranlarda katılması
suretiyle yeni kahvaltılık zahter formüllerinin geliştirilmesi amaçlanmıştır.
Bu doğrultuda toplam 15 farklı formülasyonda Kahvaltılık Zahter üretilmiştir.
Ayrıca formülasyonda kekik bitkisinin ve menengiç meyvesinin bulunmadığı
kontrol örneğinin üretimi de gerçekleştirilmiştir. Örneklerde yapılan duyusal
analiz sonucunda en çok beğenilen M4+K4 (menengiç
meyvesinin %2 ve kekik bitkisinin %2 kombinasyonunun kullanıldığı örnek)
örneğinde nem, kül, protein, yağ, karbonhidrat, ham lif, fitik asit,
antioksidan aktivite, toplam fenolik madde ve enerji değerleri belirlenmiştir.
Protein hariç diğer tüm özelliklerde tespit edilen değerler kontrol örneğinden
yüksek bulunmuştur.
ŞEKER PANCARI BESİNSEL LİFİNİN FONKSİYONEL ÖZELLİKLERİ ÜZERİNE FARKLI EKSTRAKSİYON UYGULAMALARI VE MİKRONİZASYONUN ETKİLERİ
Authors: KARABULUT İhsan , HANÇER Ayla
Published: June 2019

Bu çalışmanın amacı besinsel lif elde etme ekstraksiyon
uygulamaları ve mikronizasyon işlemlerinin şeker pancarı besinsel lifinin
fonksiyonel özellikleri üzerine etkisini belirlemektir. Çözünmez besinsel lif
ekstraksiyonu su, etil alkol ve alkali çözelti kullanılarak
gerçekleştirilmiştir. Elde edilen toz yapının mikronize edilmesinde 100 MPa
basınçta çalışan yüksek basınç homojenizatörü (YBH) kullanılmıştır. Mikronize
ve liyofilize edilen besinsel lif örneklerinin fonksiyonel özellikleri
incelenmiştir. Ekstraksiyon uygulamaları ve mikronizasyon işleminin besinsel
lifin fonksiyonel özelliklerinde önemli farklılıklar oluşturduğu saptanmıştır (P˂ 0.05). Partikül iriliği bakımından en büyük YBH etkisi su
ile ekstrakte edilen örneklerin 5 kez yüksek basınç uygulamasından geçirilmesi
ile sağlanmıştır [d(0.9) değeri 1049’dan 156 µm’ye düşmüş ve spesifik yüzey
alanı 0.0318’den 0.149 m2/g’a yükselmiştir]. Suyla ekstrakte edilen
ve YBH ile mikronize edilen örneğin şişme, su ve yağ tutma kapasiteleri diğer
uygulamalarla elde edilenlere kıyasla daha üstün bulunmuştur. Bu besinsel lif
örneklerinin düşük kalorili gıdalarda katkı maddesi olarak kullanılabilirliği
önerilebilir.
El influjo de la investigación empírica sobre la teoría sociológica según Robert K. Merton analizado desde la perspectiva de la Metateoria Estructuralista: retomando un diálogo interrumpido
Authors: Abreu Cláudio
Published: June 2019

El presente trabajo está inmerso en el contexto de la filosofía contemporánea de la ciencia, en especial de la filosofía semanticista de la Metateoría Estructuralista. El objetivo general es la aplicación del programa estructuralista en filosofía de la ciencia a las ciencias sociales, en especial a la sociología. Objetivamente, el trabajo pretende reestablecer el diálogo entre la filosofía general de la ciencia y la filosofía especial desarrollada por científicos preocupados con los fundamentos de su disciplina, en este caso, tratando del influjo de la investigación sobre la teoría según Robert K. Merton.
Uso y apropiación de las TIC: una exploración del acceso a los cibercafés y Kioskos Vive Digital en comunidades rurales
Authors: Paulhiac Pérez Juan Camilo , Ortega Hoyos Antonio José
Published: June 2019

El presente artículo abarca la relación entre las TIC y el desarrollo desde un punto de vista cultural, tomando como caso de estudio los cibercafés y los Kioscos Vive Digital en Clemencia y María la Baja, dos localidades donde las TIC juegan un papel estratégico para el desarrollo rural. El estudio combina observaciones en campo con análisis de historiales de navegación en Internet y concluye en la necesidad de expandir la noción de cultura local hacia el ámbito de lo digital, considerando los usos recreativos de las TIC dentro del proceso de apropiación tecnológica y como expresión de aspiraciones individuales y colectivas.
Nietzsche y Así habló Zaratustra
Authors: Villamor Iglesias Alejandro
Published: June 2019

Así habló Zaratustra continúa siendo, 135 años después de su publicación, la principal obra del corpus filosófico nietzscheano. Más de un siglo después de su surgimiento, este trabajo permanece como una fuente inagotable de relecturas cuyo sentido, en aras de evitar interpretaciones negligentes, conviene explicitar cada cierto tiempo. Por este motivo, este trabajo se erige como un análisis renovado de Así habló Zaratustra centrado en la clarificación conceptual de las que se considera son sus cinco principales ideas desde el propio texto. A saber: la “muerte de Dios”, el “Übermensch”, la “voluntad de poder”, el “eterno retorno de lo mismo” y la “asunción/superación del nihilismo”.Para ello, previamente partiremos de una breve aproximación al contexto filosófico del autor, al contexto de la propia obra en el conjunto de la producción nietzscheana, así como una indispensable presentación del estilo narrativo de la misma.
Coordinated Roles of the Putative Ceramide-Conjugation Protein, Cwh43, and a Mn2+-Transporting, P-Type ATPase, Pmr1, in Fission Yeast
Authors: Nakazawa Norihiko , Xu Xingya , Arakawa Orie , Yanagida Mitsuhiro
Published: June 2019

Genetically controlled mechanisms of cell division and quiescence are vital for responding to changes in the nutritional environment and for cell survival. Previously, we have characterized temperature-sensitive (ts) mutants of the cwh43 gene in fission yeast, Schizosaccharomyces pombe, which is required for both cell proliferation and nitrogen starvation-induced G0 quiescence. Cwh43 encodes an evolutionarily conserved transmembrane protein that localizes in endoplasmic reticulum (ER). Defects in this protein fail to divide in low glucose and lose mitotic competence under nitrogen starvation, and also affect lipid metabolism. Here, we identified mutations of the pmr1 gene, which encodes an evolutionarily conserved Ca2+/Mn2+-transporting P-type ATPase, as potent extragenic suppressors of ts mutants of the cwh43 gene. Intriguingly, these pmr1 mutations specifically suppressed the ts phenotype of cwh43 mutants, among five P-type Ca2+- and/or Mn2+-ATPases reported in this organism. Cwh43 and Pmr1 co-localized in the ER. In cwh43 mutant cells, addition of excessive manganese to culture media enhanced the severe defect in cell morphology, and caused abnormal accumulation of a cell wall component, 1, 3-β-glucan. In contrast, these abnormal phenotypes were abolished by deletion of the pmr1+ gene, as well as by removal of Mn2+ from the culture medium. Furthermore, nutrition-related phenotypes of cwh43 mutant cells were rescued in the absence of Pmr1. Our findings indicate that the cellular processes regulated by Cwh43 are appropriately balanced with Pmr1-mediated Mn2+ transport into the ER.
Deutschlands Ausstieg aus der Kohleverstromung bis 2038: Notwendig, aber nicht hinreichend
Authors: Häuser Wolfgang
Published: June 2019

Nach zähen Verhandlungen hat die Kohlekommission Ende Januar 2019 ihren Abschlussbericht vorgelegt. Aus diesem werden sowohl die wichtigsten Punkte vorgestellt, als auch die sich daraus ergebenden Hausaufgaben für Politik und Wirtschaft skizziert – sowie die möglichen ökonomischen Folgen für Stromverbraucher und die vom konkreten Ausstieg Betroffenen in den Braunkohlerevieren und in den Kohlekraftwerken. Der Beitrag schließt mit einer skeptischen Bewertung der bisherigen Energie- und Klimapolitik in Deutschland. Denn vor dem Hintergrund des Pariser Klimaprotokolls, das ein durchaus tragfähiges Fundament für eine globale Energiewende darstellt, sind ambitioniertere klimapolitische Ziele und Maßnahmen unerlässlich. Daher dürfte ein früherer Ausstieg aus der Kohleverstromung als 2038 unumgänglich sein. Der Druck hin zu einem solchen Zeitpfad dürfte auf künftigen UN-Klimakonferenzen zunehmen.
Removal of cobalt from lubricant oil by the use of bentonite: equilibrium, kinetic and adsorption preliminary studies
Authors: CUCCIA VALERIA , SELES SANDRO ROGÉRIO NOVAES , LADEIRA ANA CLAUDIA QUEIROZ
Published: June 2019

Radionuclides may contaminate lubricant oils in nuclear power plants. In Brazil, this kind of waste has been stored in the generator’s facilities, awaiting treatment alternatives. This work intends to investigate a process to treat it for final deposition, using bentonite as sorbent material. This process will result in decontaminated oil, free from radiological control, and radioactive loaded sorbent, with considerable volume reduction of the radioactive waste. The study focuses in cobalt removal from a simulated oil waste (non-active). The production of the simulated waste is described. Benton-ite was used for equilibrium time determination, kinetic and adsorption studies. Cobalt adsorption equilibrium was rapidly attained after 30 minutes. The data was used for modelling the system’s kinetic, applying the pseudo first and pseudo second order equation models. Experimental data fitted to pseudo second order model, supporting the assump-tion that the adsorption is due to chemisorption. Batch sorption tests were conducted and the results fitted to Langmuir and Freundlich sorption models. Both isotherm models chosen for this work did not fit to the experimental data. Thus, these are preliminary results and the studies must be repeated to evaluate data variability and better statistical inference. Other isotherm models must be evaluated to choose the best fitted one and describe the sorption of cobalt on bentonite in oil matrix. Even though, bentonite has considerable potential as sorbent for the removal of cobalt from lubricant oil. Finally, the results might be extended to other kinds of radioactive oils and radioactive organic wastes.
Analytical representation of the solution of the space kinetic diffusion equation in a one-dimensional and homogeneous domain
Authors: Tumelero Fernanda , Lapa Celso M. F. , Bodmann Bardo E. J , Vilhena Marco T.
Published: June 2019

In this work we solve the space kinetic diffusion equation in a one-dimensional geometry considering a homogeneous domain, for two energy groups and six groups of delayed neutron precursors. The proposed methodology makes use of a Taylor expansion in the space variable of the scalar neutron flux (fast and thermal) and the concentration of delayed neutron precursors, allocating the time dependence to the coefficients. Upon truncating the Taylor series at quadratic order, one obtains a set of recursive systems of ordinary differential equations, where a modified decomposition method is applied. The coefficient matrix is split into two, one constant diagonal matrix and the second one with the remaining time dependent and off-diagonal terms. Moreover, the equation system is reorganized such that the terms containing the latter matrix are treated as source terms. Note, that the homogeneous equation system has a well known solution, since the matrix is diagonal and constant. This solution plays the role of the recursion initialization of the decomposition method. The recursion scheme is set up in a fashion where the solutions of the previous recursion steps determine the source terms of the subsequent steps. A second feature of the method is the choice of the initial and boundary conditions, which are satisfied by the recursion initialization, while from the first recursion step onward the initial and boundary conditions are homogeneous. The recursion depth is then governed by a prescribed accuracy for the solution.
Investigation of polymer-based BaO and rGO nanocomposites for application in low energy X ray attenuation
Authors: SILVA LILIANE Aparecida , Batistab Adriana , Nascimentoc Jefferson , Furtadoc Clascidia , Faria Luiz
Published: June 2019

Polymeric materials can serve as a matrix for the dispersion of nanomaterials with good attenuation features, resulting in lightweight, conformable, flexible, lead-free and easy-to-process materials. Thus, some well-known radiation shielding materials could be used in low proportion as a filler, for the formation of new materials. On the other hand, nanostructured carbon materials, such as graphene oxide (GO) have been reported recently to show enhanced attenuation properties. For the present work, poly(vinylidene fluoride) [PVDF] homopolymers and its fluorinated copolymers were filled with metallic oxides and nanosized reduced graphene oxides (rGO) in order to produce nanocomposites with increased low energy X ray attenuation efficiency. We objective is to investigate the X ray shielding features of multilayered PVDF/rGO and P(VDF-TrFE)/BaO composites. PVDF/rGO overlapped with P(VDF-TrFE)/BaO thin films were sandwiched between two layers of kapton films of different thickness. The linear attenuation coefficients were measured for monochromatic X ray photons with energy of 8.1 keV. The samples were characterized by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Ultraviolet–visible (UV-vis) and Fourier-Transform Infrared (FTIR) Spectroscopy. The linear attenuation coefficient of the multilayered sample was evaluated and compared with the linear attenuation of the individual constituents. It was observed an increase in the attenuation coefficient of the overlapping samples. It is demonstrated that thin films of rGO nanocomposite with thickness of only 0.32 mm can attenuate up to 50% of X ray beams with energy of 8.1 keV, justifying further investigation of these nanocomposites as X ray or gamma radiation attenuators
A CFD analysis of blockage length on a partially blocked fuel rod
Authors: Scuro Nikolas Lymberis , Umbehaun Pedro Ernesto , Angelo Edvaldo , Angelo Gabriel , Andrade Delvonei Alves de
Published: June 2019

After a loss of coolant accident (LOCA), fuel rods may balloon. The swelling can partially block the flow channel, affecting the coolability during reflood phase. In order to analyze the influence of blockage length, using a radial blockage of 90%, varying just the blockage length, many steady state numerical simulations has been done using Ansys-CFX code to verify thermal-hydraulic properties according to different forced cooled conditions. Temperature peaks are observed on cladding, followed by a temperature drop. A 5x5 fuel assembly, with 9 centered ballooned fuel rod, flow redistribution inside channels can also be captured, indicating an overheating zone. Therefore, this study conclude, for the same boundary conditions, the longer the blockage length originated after LOCA events, the higher are the clad temperatures, indicating the possibility of overheat during transient conditions on reflood.
Simplified CFD model of coolant channels typical of a plate-type fuel element: an exhaustive verification of the simulations
Authors: González Mantecón Javier , Mattar Neto Miguel
Published: June 2019

The use of parallel plate-type fuel assemblies is common in nuclear research reactors. One of the main problems of this fuel element configuration is the hydroelastic instability of the plates caused by the high flow velocities. The current work is focused on the hydrodynamic characterization of coolant channels typical of a flat-plate fuel element, using a numerical model developed with the commercial code ANSYS CFX. Numerical results are compared to accurate analytical solutions, considering two turbulence models and three different fluid meshes. For this study, the results demonstrated that the most suitable turbulence model is the k-e model. The discretization error is estimated using the Grid Convergence Index method. Despite its simplicity, this model generates precise flow predictions.
Simulation of a severe accident at a typical PWR due to break of a hot leg ECCS injection line using MELCOR code.
Authors: Lee Seung Min , Lapa Nelbia Da Silva , Sabundjian Gaianê
Published: June 2019

The aim of this work was to simulate a severe accident at a typical PWR, initiated with a break in Emergency Core Cooling System line of a hot leg, using the MELCOR code. The model of this typical PWR was elaborated by the Global Research for Safety and provided to the CNEN for independent analysis of the severe accidents at Angra 2, which is similar to this typical PWR. Although both of them are not identical, the results obtained of that typical PWR may be valuable because of the lack of officially published simulation of severe accident at Angra 2. Relevant parameters such as pressure, temperature and water level in various control volumes, after the break at the hot leg, were calculated as well as degree of core degradation and hydrogen production within the containment. The result obtained in this work could be considered satisfactory in the sense that the physical phenomena reproduced by the simulation were in general very reasonable, and most of the events occurred within acceptable time intervals. However, the uncertainty analysis was not carried out in this work. Furthermore, this scenario could be used as a base for the study of the effectiveness of some preventive or/and mitigating measures of Severe Accident Management by implementing each measure in this model.
Reconstruction of the Lorenz system using the method of perspective coefficients
Authors: Gorodetskiy V. G. , Osadchuk N. P.
Published: June 2019

Reconstruction of the Lorenz ordinary differential equations system is performed by using perspective coefficients method. Four systems that have structures different from Lorenz system and can reproduce time series of one variable of Lorenz system were found. In many areas of science, the problem of identifying a system of ordinary differential equations (ODE) from a time series of one observable variable is relevant. If the right-hand sides of an ODE system are polynomials, then solving such a problem only by numerical methods allows to obtain a model containing, in most cases, redundant terms and not reflecting the physics of the process. The preliminary choice of the structure of the system allows to improve the precision of the reconstruction. Since this study considers only the single time series of the observable variable, and there are no additional requirements for candidate systems, we will look only for systems of ODE's that have the least number of terms in the equations. We will look for candidate systems among particular cases of the system with quadratic polynomial right-hand sides. To solve this problem, we will use a combination of analytical and numerical methods proposed in [12, 11]. We call the original system (OS) the ODE system, which precisely describes the dynamics of the process under study. We also use another type of ODE system-standard system (SS), which has the polynomial or rational function only in one equation. The number of OS variables is equal to the number of SS variables. The observable variable of the SS coincides with the observable variable of the OS. The SS must correspond to the OS. Namely, all the SS coefficients can be analytically expressed in terms of the OS coefficients. In addition, there is a numerical method [12], which allows to determine the SS coefficients from a time series. To find only the simplest OS, one can use the perspective coefficients method [10], which means the following. Initially, the SS is reconstructed from a time series using a numerical method. Then, using analytical relations and the structure of the SS, we determine which OS coefficients are strictly zero and strictly non-zero and form the initial system (IS), which includes only strictly non-zero coefficients. After that, the IS is supplemented with OS coefficients until the corresponding SS coincides with the SS obtained by a numerical method. The result will be one or more OS’s. Using this approach, we have found 4 OS structures with 7 coefficients that differ from the Lorenz system [17], but are able to reproduce exactly the time series of X variable of the Lorenz system. Numerical values of the part of the coefficients and relations connecting the rest of the coefficients were found for each OS
Adjustment of genetic algorithm parameters for solving the problem of topology optimization of the sensory network
Authors: Guk N. A. , Guk M. K. , Shapoval I. P.
Published: June 2019

The paper is devoted to the optimal placement of devices within a wireless sensor network. Modern requirements to ensure public safety in buildings with a complex structure imply the existence of systems that can detect and position emergency situation, inform rescue and tenants about the status and help them to either evacuate or eliminate the danger. Nowadays the main approach to create indoor emergency system is based on wireless sensor network. The network is built with a big number of usually battery-operating devices, each consists of a sensors set for hazard detection, and radio frequency module for communication. To evaluate the state of indoor environment different sensors can be used, such as temperature, humidity, light, flame, smoke, gas, etc. The problem of optimizing the network topology as a covering problem is formulated. A set of points in the area that is not covered by circles, a set of points belonging to the region and the intersection of two or more circles of coverage, set of points that do not belong to the area need to be minimized. To ensure fault tolerance of the wireless sensor network, it is necessary to allow the connection of each sensor with at least two routers, in case one of the routers is accidentally switched off, and also it is necessary to ensure connection of the router with at least one router. To take into account these additional conditions, the method of penalty functions is used. The genetic algorithm for solving the problem is used. The main genetic operators are adapted to the problem of designing the topology of wireless sensor networks. A computa-tional experiment was carried out, during which the optimal population size was estab-lished; the procedure of homogeneous crossing, procedure of tournament selection is chosen; procedure of homogeneous mutation. As a criterion for stopping the genetic algorithm, the stagnation of the results on the iterations of the algorithm is chosen.
Numerical study of models of optimal distribution of recreational resources
Authors: Kiselova O. M. , Stroeva V. O.
Published: June 2019

Numerical realization of the problems of optimal distribution of recreational resources adapted to the continuous non-linear multiproduct problem of optimal partitioning of sets, the solution of which can be interesting in the sense of the development of recreation and tourism, is carried out. The success of most management tasks depends on the best way to use resources. In general, this problem is reduced to the problems of optimal resource allocation. The tasks of this type include the tasks of optimal placement of tourist complexes on a given territory, which is attractive in the sense of the tourism industry. In this case, the models of functioning and development of tourist and recreational systems are considered that can be used for analysis and forecasting of the tourism industry, both at the regional and national and international levels. The problem of the optimal distribution of recreational resources in the conditions of the modern and perspective structure of recreational needs was investigated. A mathematical model of the problem is constructed, which is a nonlinear continuous multi-product problem of the optimal partition of a set into its disjoint subsets (among which there may be empty ones) with fixed coordinates of the centers of these subsets under constraints in the form of equalities and inequalities. An analytical solution of the problem is obtained, which includes parameters that are sought as the optimal solution of the auxiliary dual finite-dimensional optimization problem with a nonsmooth target functional. On the basis of the analytical solution of the problem studied, a theoretically grounded solution algorithm was developed. A numerical investigation of the problem is carried out. The presented research results can serve as a useful tool in the sense of effective optimal partitioning of the functioning zones of existing tourist and recreational facilities that are able to produce service complexes to meet the necessary needs of recreants from the service area in conditions of the optimal cost of recreational needs
Generate random rectangular maps
Authors: Kozin I. V. , Batovskiy S. E.
Published: June 2019

It is known that a large number of applied optimization problems can’t be exactly solved nowadays, because their computational complexity is related to the NP-hard class. In many cases metaheuristics of various types are used to search for approximate solutions, but the choice of the concrete metaheuristic has open question of the quality of the chosen method. There are several possible solutions to this problem, one of which is the verification of metaheuristic algorithms using examples from known test libraries with known records. Another approach to solving the problem of evaluating the quality of algorithms is to compare the "new" algorithm with other algorithms, the work of which has already been investigated. The construction a generator of random problems with a known optimal solution can solve the problem of obtaining "average" estimates of the accuracy for used algorithm in comparison with other methods. The article considers the construction of generators of random non-waste maps of rec-tangular cutting with restrictions on the rectangles of limited sizes. The existence of sets of such cards forms the basis of test problems for checking the quality of approximate algorithms for searching for optimal solution. Rectangular cutting, which is considered in the article, is also the basis for building cuts using more complex shapes. As the simplest method of generating random rectangular non-waste maps, considered a method that uses guillotine cutting. Also, a more complex algorithm for generating a random rectangular cut is given, whose job is to generate a random dot grid and remove some random points from this grid. Much attention is paid to the implementation of the above methods, since the main purpose of the article is to simplify using of generators in practice. All the above algorithms are already used in the software system for testing evolution-aryfragmentary algorithms for various classes of optimization problems on the graphs
Macroeconomic Characteristics of Tourism Economy in the Republic of Tunisia
Authors: Zhulina Marina A. , Kitsis Vyacheslav M. , Saraykina Svetlana V.
Published: June 2019

Introduction. Tourism is a dynamic, constantly developing sector of the economy. Tourism economy develops along with the society, recreation and tourism. The purpose of the article is to show the features of the impact of tourism on the national economy using the case of Tunisia. The experience of Tunisia is especially useful for the countries where beach recreation has developed and where the political situation has remained difficult for a long time (Egypt, Turkey, Thailand, etc.).

Materials and Methods. The article is based on the statistical data provided by the World Tourism Organization, the World Data Atlas and open Internet sources. The study employed general scientific methods (analysis, synthesis, synthesis, comparison, etc.) and special ones (the methods of mathematical statistics, the graphical method, the comparative method, etc.).

Results. For the first time, the article has provided a fairly complete description of the macroeconomic indicators characterizing the level of development of international tourism in Tunisia. The article has analyzed the dynamics of inbound and outbound tourism, discussed the factors affecting the volume of international tourism, considered international tourism expenditures and revenues, which to a large extent have a positive or negative impact on the country’s balance of payments. The trends in the development of international tourism in Tunisia have been revealed and the problems facing the industry have been identified.

Discussion and Conclusion. The research has revealed that tourism economy largely depends on the political and economic processes taking place in the country. The current level of macroeconomic indicators of tourism economy in Tunisia lags behind the 2008–2009 figures. The results of the study made it possible to assess the current state of international tourism and make a number of suggestions aimed at increasing the level of development of international tourism in the country. The results of the study can contribute to the development of a program aimed to boost tourism economy in Tunisia, one of the key tasks of which should be that of increasing performance at the macro-level.
Threats to the Economic Security of the Agricultural Sector of the Republic of Mordovia
Authors: Vorobyova Elena G. , Kildyushkina Irina G.
Published: June 2019

Introduction. The issue of food security and the task of increasing Russia’s exports make it necessary to identify and monitor the threats to the economic security of agriculture in each region; therefore the topic is of particular relevance. The main goal of the study is to identify and analyze the threats to the economic security of the agricultural sector of the Republic of Mordovia and their sources.

Materials and Methods. The agricultural sector of the Republic of Mordovia was considered as the object of the research. The study employed the methods of system analysis, economic statistics, and analytical, dynamic and graphical interpretation of information.

Results. The authors have analyzed the development of the agricultural sector over the past ten years, identified and examined the threats to the economic security of the industry and their sources, presented a classification of the threats, substantiated the range of measures aimed at preventing and neutralizing the threats. It has been proved that the identified threats are not completely insurmountable but are systemic since they are formed at the macro level and require an identical comprehensive solution within the framework of the state regional policy.

Discussion and Conclusion. It has been concluded that the present threats to the agriculture of the Republic of Mordovia resulted from the 1990s ignorant policies. Despite the measures taken, the situation still cannot be improved. Further research may be aimed at developing a methodology for analyzing threats to sectoral economic security at the regional level. The practical significance of the study lies in the possibility of applying the obtained information when establishing sectoral programs for the development of agriculture and the agro-industrial sector by the constituent entities of the Russian Federation facing similar threats.
Regional Features in the Legislation of the Republic of Mordovia on Education
Authors: Beliaikina Anastasia I.
Published: June 2019

Introduction. Education is of priority interest for the state. The future of Russia, its economic development, and the level of welfare in the society largely depend on its quality. Therefore, identification and study of the peculiarities of the legal regulation of the right to education in the regions of Russia is a relevant topic. The purpose of this paper is to investigate the legislation of the Republic of Mordovia on education, to identify whether consideration is given to socio-economic, national, geographical, ethnocultural, demographic and other features of the region when laws are made.

Materials and Methods. The rules of the current legislation of the Russian Federation and the Republic of Mordovia on education were used as the materials for the study. Open data from municipal budgetary educational institutions of the Republic of Mordovia formed the information base of the research. The study employed the method of systemic and structural analysis, that of comparison, as well as the formal logical method.

Results. The study has revealed the peculiarities of the region taken into account in the Republic of Mordovia in the process of rule-making in the field of education: the ethnic, economic, geographical, and socio-economic ones. It has been established that in the Republic of Mordovia additional guarantees are provided for the realization of the constitutional right to education: material support is provided to orphans and children left without parental care whose tuition is paid for from the federal or republican budget.

Discussion and Conclusion. The research results made it possible to draw the conclusion that consideration of the peculiarities of Mordovia in regional legislation on education is at the appropriate level. Further research may be associated with identifying the regional features and introducing them into the legislation of the constituent entities of the Russian Federation. The data obtained will be useful to regional authorities and administrations of municipal districts when drafting regu­lations and drawing up programs for the development of education in the region.
Providing Invariance to Disturbing Effects in Rail Lines
Authors: Tarasov Evgeniy M. , Zheleznov Dmitry V. , Vasin Nicolay N. , Tarasova Anna E.
Published: June 2019

Introduction. The time interval systems for controlling train movement operated under the influence of significant industrial disturbances, interference from the electric current of traction rolling stocks, and significant climate changes that result in fluctuations of parameters of circuit elements. These factors lead to the appearance of internal disturbances. The fluctuations in a wide range of the conductivity of rail lines insulation are the main external disturbances leading to considerable changes of the informative parameter, the voltage at the output end of the rail line. At present, there are many methods for suppressing disturbances, which allow correcting fluctuations in the informative signal without deteriorating the quality of classification. The article deals with the problem of providing insensitivity of the output informative signal to the influence of disturbance by principles of coordinate compensation with a correcting link.
Materials and Methods. To solve the problem, various methodologies of compensation for disturbances are considered in the paper; the method of coordinate compensation for disturbances at the input of a quadripole of rail lines is adopted as the main one. The equation of the transfer function of the correcting link is determined, assuming an indirect measurement of the input resistance of the rail line, which is a function of the conductivity of the insulation.
Results. The article presents the results of the research of the invariant capabilities of the disturbance compensation principle. It is shown that disturbances compensation with a corrective link included at the input of a quadripole allows one to significantly reduce the dynamic range of the output informative signal change in each of the classes, i.e. classes have become more compact, and the quality of classification has become 5 times higher than in the absence of compensation of disturbances.
Discussion and Conclusion. The results confirm the effectiveness of the proposed method for the coordinate compensation of disturbances in rail lines with an open circuit in the absence of the possibility for organizing feedback, a variable circuit in each of the classes of states, and the impossibility of creating a physical additional channel for the transmission of the disturbance. Using the proposed method in the construction of modern classifiers will significantly improve the stability of the functioning of train control systems; eliminate errors of the first kind, leading to unproductive idle train, and errors of the second kind, leading to accidents and crashes.
The Quadcopter Design Based on Integrated Model Environment
Authors: Chugunov Mikhail V. , Polunina Irina N. , Popkov Mikhail A.
Published: June 2019

Introduction. The deals with the multi/interdisciplinary approach to designing the unmanned aerial vehicle (quadcopter) based on the use of the integrated model environment. The designing process is implemented as creating different types of models: natural (physics) and virtual.
Materials and Methods. The virtual model is understood to be a set of mathematical, algorithmic, program and 3D models maintaining its functioning in virtual environment. The design decision represents a set of the design-technology documentation including the integrated model of the designed project, whose components are connected with each other. The natural (physics) part of the integrated model environment includes the following components: a carrier system, shell details, electromechanical and electronic systems for controlling navigation, telemetry and sensory. For the carrier systems and shells there used polyamide bionic parts, which are purchased and printed on the 3D printer; the basic element of electronic system is the flight controller ArduPilot (ArduCopter). The virtual environment of modelling is formed on the basis of CAD/CAE/CAM/PDM/PLM SolidWorks (Motion, Simulation). The main tools, used for creating the communications between models of different types and levels, are the COM technology, API CAD/CAE/CAM/PDM/PLM system, MS Visual Studio C++, which allow developing the integrated interface for controlling the flight and planning the trajectory in the real and virtual environment.
Results. The integrated (natural and virtual) model environment for the quadcopter is developed. On this basis, the design decision in the form of a real object and its virtual model is made. The state and behaviour of these objects is controlled and guided by the software having access both to a real object and to its 3D model. The received result can be considered as the tool of engineering for the solution of a wide range of scientific, technical and production tasks: performing defectoscopy, diagnosing emergencies, and 3D-scanning remote and hard-to-reach objects.
Discussion and Conclusion. The research shows the efficiency of the approach to designing as to process of creating the multi/interdisciplinary models of different types and levels. At the same time, the problem of integrating these models into a coherent whole by forming bidirectional associative communications has assumed particular importance. The technological (program) means for synchronizing a state and behaviour of the natural and virtual models of design objects require further development.
ANALISIS KESALAHAN DALAM MENYELESAIKAN SOAL KOMUNIKASI MATEMATIS MATERI BANGUN RUANG
Authors: Rahman Iffa Hanifah , Yassar Meilinda Manda , Fauziah Nadya Suciati , Rohmi Nurul , Sugilar Hamdan
Published: June 2019

The purpose of this study is to describe the errors and causes that often occur in solving problems in the material building space beam and cube in terms of mathematical communication. In this study using a type of qualitative descriptive research, with data collection techniques used are tests, and interviews. The subjects of this study were 4th semester students at one of the universities in Bandung. The analysis technique used is an interactive technique which includes data collection, data reduction, data presentation, and conclusion drawing. The mathematical communication indicators used in this research are expressing everyday problems in mathematical languages / symbols, presenting allegations, and drawing conclusions. Errors made by students in solving problems are wrong in symbolizing data that is known and asked, does not calculate prerequisite data, determine formulas, and do not draw conclusions. The cause of the error is due to the assumption that symbolizing the known and asked data is not important, does not focus when working on the problem so that it is not thorough and understands the questions given, and the unfamiliarity to draw conclusions on each problem resolved
Efektivitas Analgesik Pascaoperasi pada Pasien Pediatrik di Ruang Pemulihan Rumah Sakit Dr. Hasan Sadikin Bandung Periode Juni–November 2018
Authors: Bernadeth Bernadeth , Oktaliansah Ezra , Indriasari Indriasari
Published: June 2019

Nyeri merupakan pengalaman sensorik dan emosional yang tidak menyenangkan. Penyebab utama nyeri akut pada anak adalah prosedur pembedahan, trauma, dan penyakit akut. Penilaian nyeri merupakan bagian penting dari manajemen nyeri. Penelitian ini bertujuan mengetahui efektivitas analgesik pascaoperasi pada pasien pediatrik  di ruang pemulihan RSUP Dr. Hasan Sadikin Bandung periode Juni-November 2018. Penelitian menggunakan metode deskriptif observasional prospektif terhadap 471 pasien pediatrik pascaoperasi di ruang pemulihan. Subjek penelitian dikelompokkan berdasar atas jenis operasi yang menyebabkan nyeri ringan, sedang, dan berat. Jenis analgesik pascaoperasi yang diberikan dan penilaian nyeri selama di ruang pemulihan dicatat untuk melihat efektivitas analgesik pascaoperasi tersebut. Dari hasil penelitian efektivitas analgesik pascaoperasi pada jenis operasi nyeri ringan sebanyak 181 pasien (99,5%), jenis operasi nyeri sedang sebanyak 231 pasien (98,7%), dan pada jenis operasi nyeri berat sebanyak 53 pasien (96,4%). Simpulan penelitian ini adalah efektivitas analgesik pascaoperasi pada pasien pediatrik di RSUP Dr. Hasan Sadikin Bandung masih kurang efektif karena belum memenuhi target rumah sakit 100% bebas nyeri dan pemberian analgesik juga belum efisien karena masih banyak terdapat ketidaksesuaian antara pilihan analgesik dan derajat nyeri.Effectiveness of Post-Operative Analgesia on Pediatric Patients in the recovery room of Dr. Hasan Sadikin General Hospital Bandung from June to November 2018Pain is an unpleasant sensory and emotional experience. Pain assessment is an important part of pain management. The main causes of acute pain in children are surgical procedures, trauma, and acute diseases. This study aimed to study the effectuIveness of postoperative analgesics in pediatric patients in the recovery room of Dr. Hasan Sadikin General Hospital Bandung from June to November 2018. This was a prospective observational descriptive study on 471 postoperative pediatric patients in recovery rooms. The research subjects were grouped based on the type of surgery pain, i.e. mild, moderate, and severe. The type of postoperative analgesics given and assessment of pain during the stay in the recovery room were recorded to see the effectiveness of the postoperative analgesic drug. From the results of the study it was identified that the of postoperative analgesics was effective for 181 patients (99.5%) in the mild pain surgery group, for 231 patients (98.7%) in the moderate pain surgery, and for 53 patients (96.4%)  in severe pain surgery. It is concluded that the postoperative analgesics provided to pediatric patients at Dr. Hasan Sadikin General Hospital Bandung is still less effective because it has not met the target of 100% pain free set by the hospital and that analgesic administration is also not efficient because there are still many discrepancies in analgesic choices and the degree of pain.