bluuebunny/crossref_metadata_2025 huggingface dataset:
Генерування ландшафтів для сферичних поверхонь: аналіз завдання та варіанти вирішення
Authors: Морозов М. Ю. , Левус Є. В. , Моравський Р. О. , Пустельник П. Я.
Published: May 2020

Проаналізовано проблему генерування ландшафтів за наявними методами для порівняння їх можливостей, виділено основні переваги і недоліки. Розглянуто програмні інструменти, які дають змогу генерувати ландшафти для різних поверхонь. Запропоновано власний метод на підставі поєднання методів, описаних у науковій літературі, який дає змогу гнучко керувати кількісними та якісними показниками моделювання ландшафтів для сферичних поверхонь завдяки введенню параметрів впливу. Зміст методу полягає у застосуванні програмних агентів для відповідного створення складових моделі, а саме – генерування планетоїда, клімату та моделі ландшафту загалом. Для попереднього оброблення моделі планетоїда здійснюють генерування опуклої оболонки та виконують вибір програмних агентів з алгоритмами для оброблення ландшафтів, а також створення бази даних для зберігання всіх результатів. Програмні агенти під час оброблення використовують маски, які потрібні для контролю впливу кожного програмного агента на модель ландшафту загалом. На відміну від відомих рішень, де шари є неподільні і їхня зміна щоразу вимагає повного перерахунку всього ландшафту, запропонований метод дає змогу вільно модифікувати вплив одних агентів на інші на підставі задавання різних масок, а також ділити створені шари на підрівні. Завдяки введенню програмних агентів і масок метод автоматизовано здійснює параметризацію процесу генерування ландшафтів деталізованих планетоїдів з подальшою їх серіалізацією та обробленням. Застосування програмних агентів дає змогу забезпечити гнучкість методу (урахування різних параметрів моделі планетоїда за різного порядку застосування програмних агентів), економічність виконання обчислень (для різної деталізації сегментів сферичної поверхні не потрібні обчислення з "нуля"). Перевагами запропонованого рішення є врахування різних деталей для забезпечення високої реалістичності результату та уникнення зайвих обчислень для різних рівнів зближення огляду поверхонь.
Methods of determination of quality of software
Authors: Грицюк Ю. І. , Муха Т. О.
Published: May 2020

Developed modern software tool for determining the quality of software (SW) techniques metric analysis. The software allows you to use quality metrics to calculate the corresponding metric and determine the value of the complex index of quality software product. Clarified the quality assessment process, software analyzes the concept of the quality of the software product as an object of standardization and quality levels of performance models of the software. This allowed the opportunity to improve the quality of software by generating the relevant requirements of the criteria for quality evaluation. It is also possible to make the improvement of the metric analysis of models of its quality and its quantitative measurement methods in all phases of a software project. It was revealed that the driving force behind the success of software projects is the desire of their leaders to develop such software, which would have a certain value. It should be important for certain tasks or to achieve tactical and strategic objectives. The value of the software can be expressed in the form of its value, or in some other form. The customer usually has their own idea of ​​the maximum cost of investing in the development of software. These funds profit it expects to achieve in the case of the main goals of using the software. It can also have a vision of the functionality of software and certain expectations of its quality. The features of the use of the metric analysis for determining the quality of the software, revealed the lack of uniform standards for the metric. Therefore, each supplier of its measurement system offers its own methods of evaluating the quality of software and associated metrics. Also it is challenging the interpretation of metric values, since for the majority of users of its software metrics and their values ​​are not absolutely clear and informative. It was found that the main parameters of the choice of an embodiment of the software is its cost, the duration of the development process and the reputation of the designer of the company. But the decisions taken on the basis of these parameters, not always guarantee proper quality of the software.
Nanotehnologija the use of Aluminium-containing Raw Materials in the Petrochemical Industry to Produce High -performance Brick
Authors: Abdrakhimov V. Z. , Abdrakhimova E. S.
Published: May 2020

The reduction in the reserves of traditional natural raw materials makes us look for new ways to replace it with different types of waste. At the same time, the costs of exploration, construction and operation of quarries are excluded, and significant land plots are exempt from the impact of negative anthropogenic factors. The experience of advanced foreign countries has shown the technical feasibility of this direction and its application as a tool for protecting the natural environment from pollution. On the basis of inter-shale clay and high-alumina nanotehnologija raw materials petrochemical spent catalyst IM-2201 NovoKuibyshev petrochemical plant derived ceramic brick with high physical-mechanical properties without the use of traditional natural materials. Using nanotechnogenic petrochemicals - spent catalyst IM-2201, containing more than 70% A12O3, a ceramic brick was obtained that corresponds to the M200 brand. It is possible to build load-bearing walls of the lower floors of high-rise buildings (15 floors or more) from M200 ceramic bricks. Innovative proposals for the use of industrial waste: interslant clay and spent catalyst in the production of high-strength ceramic earthquake-resistant bricks with high strength and frost resistance have been developed. The absolute advantage of using multi-tonnage waste of the spent IM-2201 catalyst and inter-shale clay for the waste of oil shale is the unloading of the environmental situation.
Convergence of Monte Carlo algorithm for solving integral equations in light scattering simulations
Authors: Kraszewski Maciej , Pluciński Jerzy
Published: May 2020

The light scattering process can be modeled mathematically using the Fredholm integral equation. This equation is usually solved after its discretization and transformation into the system of algebraic equations. Volume integral equations can be also solved without discretization using the Monte Carlo algorithm, but its application to the light scattering simulations has not been sufficiently studied. Here we present the implementation of this algorithm for one- and three-dimensional light scattering computations and discuss its applicability in this field. We show that the Monte Carlo algorithm can provide valid and accurate results but, due to its convergence properties, it might be difficult to apply for problems with large volumes or refractive indices of scattering objects.
Utilization of the cyclic interferometer in polarization phase-shifting technique to determine the thickness of transparent thin-films
Authors: Kaewon Rapeepan , Pawong Chutchai , Chitaree Ratchapak , Lertvanithphol Tossaporn , Bhatranand Apichai
Published: May 2020

An alternative polarization phase-shifting technique is proposed to determine the thickness of transparent thin-films. In this study, the cyclic interferometric configuration is chosen to maintain the stability of the operation against external vibrations. The incident light is simply split by a non-polarizing beam splitter cube to generate test and reference beams, which are subsequently polarized by a polarizing beam splitter. Both linearly polarized beams are orthogonal and counter-propagating within the interferometer. A wave plate is inserted into the common paths to introduce an intrinsic phase difference between the orthogonal polarized beams. A transparent thin-film sample, placed in one of the beam tracks, modifies the output signal in terms of the phase retardation in comparison with the reference beam. The proposed phase-shifting technique uses a moving mirror with a set of “fixed” polarizing elements, namely, a quarter-wave retarder and a polarizer, to facilitate phase extraction without rotating any polarizing devices. The measured thicknesses are compared with the measurements of the same films acquired using standard equipment such as the field-emission scanning electron microscope and spectroscopic ellipsometer. Experimental results with the corresponding measured values are in good agreement with commercial measurements. The system can be reliably utilized for non-destructive thickness measurements of transparent thin-films.
Synthesis and anticancer activity of bis(2-arylimidazo[1,2-a]pyridin-3-yl) selenides and diselenides: the copper-catalyzed tandem C–H selenation of 2-arylimidazo[1,2-a]pyridine with selenium
Authors: Matsumura Mio , Takahashi Tsutomu , Yamauchi Hikari , Sakuma Shunsuke , Hayashi Yukako , Hyodo Tadashi , Obata Tohru , Yamaguchi Kentaro , Fujiwara Yasuyuki , Yasuike Shuji
Published: May 2020

Most heteroaryl selenides and diselenides are biologically active, with some reported to act as antioxidants and show activities that are medicinally relevant; hence, the development of efficient methods for their synthesis is an important objective. Herein, a simple method for the synthesis of selenides and diselenides bearing imidazo[1,2-a]pyridine rings and their anticancer activity are described. The double C–H selenation of imidazo[1,2-a]pyridine with Se powder was catalyzed by CuI (10 mol %) ligated with 1,10-phenanthroline (10 mol %) at 130 °C under aerobic conditions. The selenides or diselenides were prepared almost selectively using selenium powder in an appropriate quantity under otherwise identical reaction conditions. The prepared selenides and diselenides bearing two imidazo[1,2-a]pyridine rings were all novel compounds. Among the prepared diselenides and selenides that exhibited cytotoxicity against cancer cells, bis[2-(4-methoxyphenyl)imidazo[1,2-a]pyridin-3-yl] diselenide showed an excellent anticancer activity and low cytotoxicity toward noncancer cells, suggesting that this diselenide is a potential lead compound for anticancer therapy.
Palladium-catalyzed regio- and stereoselective synthesis of aryl and 3-indolyl-substituted 4-methylene-3,4-dihydroisoquinolin-1(2H)-ones
Authors: Nori Valeria , Arcadi Antonio , Carlone Armando , Marinelli Fabio , Chiarini Marco
Published: May 2020

Cascade cyclocarbopalladation of the readily available aryl/alkyl-substituted propargylic amides containing an aryl iodide moiety, followed by Suzuki–Miyaura coupling with arylboronic acids, allowed an efficient regio- and stereoselective synthesis of tetrasubstituted 4-methylene-3,4-dihydroisoquinolin-1(2H)-ones. Moreover, cascade cyclocarbopalladation, followed by the reaction with 2-alkynyltrifluoroacetanilides, accomplished a double cyclization to afford challenging 4-methylene-3,4-dihydroisoquinolin-1(2H)-ones bearing a 3-indolyl substituent through aminopalladation/reductive elimination.
Искусственный интеллект в системе обучения РКИ и оценке уровня владения русским языком как иностранным
Authors: Elnikova S.I.
Published: May 2020

В статье рассматриваются возможности использования цифровой образовательной среды в процессе организации обучения по РКИ ипроведения сертификационного тестировании по РКИ с использованием возможностей искусственного интеллекта в оценке уровня владения РКИ в части такого продуктивного вида речевой деятельности, как письмо.

The article discusses the possibilities of using a digital educational environment in the process of organizing training in Russian as a foreign language and conducting certification testing in Russian as a foreign language using the capabilities of artificial intelligence in assessing the level of proficiency in Russian as a foreign language in terms of such a productive type of speech activity as writing.
ОБУЧЕНИЕ СВЯЗНОМУ КИРИЛЛИЧЕСКОМУ ПИСЬМУ НА УРОКАХ РКИ
Authors: Valkova E.A. , Odincova M.V.
Published: May 2020

В статье рассматривается ряд методов и приемов технологии В.А.Илюхиной с точки зрения возможности их применения на уроках РКИ. Проанализирован опыт использования технологии Письмо с секретом в иностранной аудитории. Обозначены навыки, формируемые в результате обучения по этой технологии.

The article presents a number of methods and ways of the Technology from the point of view of their possible using in RasFL. There has been analyzed the experience of applying the Technology Writing with a secretin the classroom for foreign students. Some skills formed as a result of learning this Technology have been indicated.
АВДЕЕВА И.Б., ВАСИЛЬЕВА Т.В., ОРЛОВА Т.К., АРТЕМЬЕВА Г.В., БОГОМОЛОВА И.А., ДУБИНСКАЯ Е.В., КОСАРЕВА В.Г., КОЛОСОВА Т.Г., ФИЛИПСКАЯ Т.А., ЦВЕТОВА Н.Е. РУССКИЙ ЯЗЫК ДЛЯ ИНОСТРАННЫХ УЧАЩИХСЯ ИНЖЕНЕРНОГО ПРОФИЛЯ: ЛЕКСИКА И ГРАММАТИКА
Authors: Baranova I.I.
Published: May 2020

Рецензия содержит оценку учебного комплекса с точки зрения дидактической значимости научной концепции авторов в реализации целей учебно-познавательной деятельности будущих инженеров вобразовательной среде российского вуза. Реализация данной научной концепции в учебном комплексе обеспечивает формирование у иностранных учащихся прочных языковых навыков в процессе обучения грамматике на материале аутентичных текстов.

The review provides an assessment of the given course book complex from the point of view of the didactic significance of the authors scientific concept while implementing the goals of future engineers educational and cognitive activity in the Russian-language educational environment. The implementation of this scientific concept in the educational course book complex ensures the development of foreign students language skills in the process of teaching grammar based on authentic texts.
USE OF THE LINK RANKING METHOD TO EVALUATE SCIENTIFIC ACTIVITIES OFSCIENTIFIC SPACE SUBJECTS
Authors: Biloshchytskyi A. , Kuchansky А. , Andrashko Yu. , Biloshchytska S.
Published: May 2020

A modification of the PageRank method based on link ranking is proposed to evaluate the research results of subjects of the scientific space, taking into account self-citation. The method of reducing the influence of self-citation on the final evaluation of the results of research activity of subjects of the scientific space is described. The evaluation of the results of research is calculated using the modified PR-q method, taking into account self-citation as a solution of a system of linear algebraic equations, matrix of which consists of coefficients determined by the number of citations of publications of one scientist in the publications of another scientist. The described method can be used for the task of evaluating the activity of the components of the scientific space: scientists, higher education institutions and their structural units. For the task of evaluating the research activity of subjects of the scientific space, a method based on link ranking (PageRank method for web pages) and taking into account the self-citation of scientists is proposed. The latter allows for an adequate assessment, taking into account the abuses associated with the authors excessive self-citation. The essence of the constructed method lies in the construction of a system of linear algebraic equations, whose coefficients of the matrix reflect the citations of some scientists by others in the citation network of scientific publications. The value of the coefficients of the matrix of such a system of linear algebraic equations is subject to certain restrictions, which allow to reduce the influence of the factor of excessive self-citation of the author on his overall assessment of research activity. The described method can be used to calculate the complex evaluation of the components of the scientific space: the scientist, the institution of higher education and its separate structural units. Evaluating research results provides an opportunity to verify the relevance of the research process to the goals identified at the planning stage and, if necessary, to adjust the progress of those studies. Also, the calculation of research evaluations of the components (objects and entities) of the scientific space is a powerful tool for managing research projects.
THE EXPERT SYSTEM OF CONTROL AND KNOWLEDGE ASSESSMENT
Authors: Golovachyova V. , Tomilova N. , Abildaeva G.
Published: May 2020

The article deals with the problem of objective knowledge assessment using expert automated systems for monitoring and evaluating knowledge. The expert systems of control and knowledge estimation are usually developed on the basis of different approaches to constructing a question and answer on test. The analysis of existing testing methods made it possible to conclude that questions with selective and selectively constructed types of answer do not always allow objectively assessing the knowledge of trainees, which reduces the stimulating effect of pedagogical evaluation on cognitive activity of trainees, and the quality of the learning process as a whole. The article proposes a method of knowledge estimation, which is based on a new approach to constructing a question and answer that allows a freely designed form of a test response. Such answer is analyzed by a set of criteria for its formation based on the developed algorithms for the criteria for assessing their quality. This makes it possible to apply the obtained results to solve the scientific problem of objective knowledge assessment using testing. The proposed approach gives an opportunity to expand the functions of tests, thereby increasing the approximation degree of the estimation for the test to the level of the real knowledge of students. The purpose of the article is to justify the effectiveness and develop the expert system of control and knowledge assessment. The article is addressed to a wide range of researchers and experts in the field of education and information technologies.
INFORMATION TECHNOLOGIES AND THE FUTURE OF EDUCATIONIN THE REPUBLIC OF KAZAKHSTAN
Authors: Kropachev P. , Imanov M. , Borisevich J. , Dhomane I.
Published: May 2020

The aim of the article is a comprehensive approach to addressing the digitalization of education in the Republic of Kazakhstan based on identifying problems in this area, forming priority tasks and possible ways to solve them. Implementation of IT-programs in the learning process making serious additions to the pedagogical requirements, ethics, and discipline of students also the content of the disciplines. All these aspects are becoming especially relevant today when the quality of education is becoming a strategic task and the key to the successful development of the countrys economy in the digital era. The article touches on the problems of the modern digital generation, its dependence on communication in social networks and instant messengers, the impact of this dependence on health and the level of knowledge. The algorithm for educational technologies will be the main educational goals: the ability to think outside the box, be creative in solving problems, and develop logic and intelligence. Therefore, to formulate requirements for training ICTs, it is necessary to implement measures to assess the effectiveness of implemented programs based on experimental data. Such studies are being conducted today to improve the quality of the educational process, which means that they can be used for ICT. In conclusion, if to base on the results of the survey, the main problems were identified and a number of tasks were set for a deeper study, a general idea was formed on the scope of the forthcoming work and the goals for its achievement.
FUZZY INFERENCE SYSTEMS BASE ON POLYNOMIALCONSEQUENTS OF FUZZY RULES
Authors: Ponomarenko R. , Dyka A.
Published: May 2020

Various fuzzy inference systems that operate on the basis of polynomial consequents of fuzzy rules. As well as inference methods for such systems, in particular, Takagi-Sugeno fuzzy inference systems, their differences from other popular fuzzy systems, such as Mamdani systems, etc., are considered. The attention is focused on the features of the functioning of such systems both in the construction of elementary fuzzy systems. The Systems for which the calculation of the general logical conclusion involves intermediate levels of logical inference with many hierarchically interconnected blocks of fuzzy rules. Fuzzy sets of type 2 are considered, the membership index of which is a fuzzy term of the first type. This allows you to take into account the secondary fuzziness of linguistic concepts in the design of intelligent systems based on fuzzy inference. Fuzzy systems of the second type based on Takagi-Sugeno systems and the iterative Karnik-Mendel algorithm are considered to obtain a logical conclusion for fuzzy systems with the interval membership functions of the second type in the antecedents of fuzzy rules. The proposed procedure for lowering the order of fuzzy rules for higher-order Takagi-Sugeno fuzzy systems is described and justified. A fuzzy inference method for higher-order fuzzy systems based on the partition of a set of input variables is proposed. It is proposed to build a separate block of fuzzy rules for each of the input subspaces in the presence of a common polynomial. Which is a higher-order consequent, that reduces the total number of fuzzy rules in blocks.
CЫМСЫЗ ЖЕЛІЛЕРДЕ АҚПАРАТТАРДЫ ҚОРҒАУ ӘДІСТЕРІ
Authors: Shinasilova F.
Published: May 2020

Апаратты технологияларды дамуы компьютерлк желлерд сенмд трде жмыс стеун жоарылату тапсырмасын ала ояды. Желлерд аупсздгн зерттеу шн жел арылы апаратты ресурстарды жберу барысында желлк хаттамаларды, желлк архитектураларды, аупсздкт ныайту тслдерн руды зерттеу ажет. Желлк шабуылдар, стен шыу, желлк рылыларды стен шыуы сымсыз желлерде апаратты тарату барысында аупсздкке сер ететн негзг факторлар болып табылады. Бл маалада сымсыз желлерде апараттарды оралуын амтамасыз ететн дстер, соны шнде аутентификация, шифрлену жне аупсздкт амтамасыз ететн стандарттар арастырылан. аупсздкт брнеше стандарттары бар, бра бл маалада сол стандарттарды тимдлг мен стандарттарда олданылатын клттерд жмыс стеу принциптер айындалан. Сонымен атар, млметтерд пиялыы мен ттастыын амтамасыз ететн стандарттарды жмыс стеу аидасы аныталан. Яни, TKIP хаттамасы рбр тасымалданатын млметтер пакет шн жаа пия клтт генерациялайды жне бр статистикалы WEP клт шамамен 500 миллиард ммкн болатын клттерге алмастырылады. Ол осы млметтер пакетн шифрлеу шн олданылу ммкн. Клтт генерациялау механизм згертлген. Ол ш компоненттен трады: 128 битт зындыы бар базалы клт(ТК), тасымалданатын пакетт номер(TSC) пен тасымалдаушы рылыны МАС-адрес(ТА). Сонымен атар, TKIP-те инициализациялауды 48 разрядты векторы олданылады. Ол IV векторын айта-айта олдану жадайын туызбау шн олданылады. TKIP алгоритм 48 битт зындыы бар (TSC) пакет есебн олданылады. Ол рдайым артып отырады. Ал, 16 битт TSC жаа IV енгзлед(Сурет 4). Осылайша, шабуылдара тосауыл бола алатын механизм алыптасады.

The development of information technology sets the task of improving the reliability of computer networks. To study the security of networks, it is necessary to study the creation of network protocols, network architectures, and ways to strengthen security when transmitting information resources over a network. Network attacks, failures, and the failure of network devices are key factors affecting the security of information transmission in wireless networks.This article discusses methods for protecting information in wireless networks, including standards for authentication, encryption, and security. There are several security standards, but this article describes the effectiveness of those standards and the key principles used in those standards. It also outlines the principles of standards that ensure the confidentiality and integrity of data. That is, the TKIP protocol generates a new secret key for each packet of data transmitted, and one static WEP key is exchanged for about 500 billion possible keys. It can be used to encrypt this data set. The key generation mechanism has been modified. It consists of three components: a 128-bit Basic Key (TC), a packet number (TSC) and a MAC address of the carrier. The TKIP also uses a 48-bit initialization vector. It is used to prevent repeated use of vector IV. The TKIP algorithm uses a 48-bit (TSC) packet calculation. It keeps increasing. Well, the new 16-bit TSC IV is introduced (Figure 4). Thus, a mechanism is created that can block attacks.
Mediating Between Public and Private Enforcement in Multi-Jurisdiction Settings
Authors: Noonan Chris
Published: May 2020

Private enforcement was built into many competition statutes from the start, or uncovered by the courts early in the life of the regime. Many aspects of private cartel enforcement impact on public enforcement, and vice versa. The relationship between public and private enforcement is complex and multifaceted. However, most examinations of the relationship tend to take public enforcement as given and examine the additional role that private enforcement can and should play. The answer is usually greater deterrence of cartel conduct or compensation for harms suffered by the victims of cartel conduct.
Induction and evaluation of colchitetraploids of two species of Tinospora Miers, 1851
Authors: Thakur Rakesh Kr. , Rajpal Vijay Rani , Rao Satyawada Rama , Singh Apekshita , Joshi Lata , Kaushal Pankaj , Raina Soom Nath
Published: May 2020

Autotetraploidy, both natural and/or induced, has potential for genetic improvement of various crop species including that of medicinal importance.Tinospora cordifolia(Willdenow, 1806) Miers, 1851 ex Hooker et Thomson, 1855 andT. sinensis(Loureiro, 1790) Merrill, 1934 are two diploid species, which are dioecious, deciduous and climbing shrubs with high medicinal importance. Among the three methods used for induction of polyploidy by colchicine treatment, it was cotton swab method which successfully induced the polyploidy in both species. The morphological and cytogenetical features of the synthetic tetraploids were compared with their diploid counterparts. The tetraploids were morphologically distinct from diploid plants. They exhibited larger organs, such as stem, leaves, inflorescence, fruits, flowers and seeds. The tetraploids were characterized by the presence of low quadrivalent frequency and high bivalent average. Unequal distribution of chromosomes at anaphase I was found in 60% cells. The present study provides important information on the superiority of autotetraploids as compared to diploid counterparts in both species.
A new genus for Pericera septemspinosa Stimpson, 1871 and Pericera heptacantha Bell, 1836 (Crustacea, Brachyura, Majoidea), based on morphology and molecular data
Authors: Colavite Jessica , Windsor Amanda M. , Santana William
Published: May 2020

A new genus of majoid spider crab,Pohleusgen. nov.is established forPericera septemspinosaStimpson, 1871 andPericera heptacanthaBell, 1836, based on morphology and molecular data from the partial sequences of the 12S and 16S mitochondrial genes and the 18S small subunit rRNA nuclear locus. The species are re-described and illustrated, based on material from several localities of the western Atlantic and eastern Pacific oceans. The carapace, antennal and pterygostomial spines, male thoracic sternum and first gonopods are distinctive characters, distinguishingPohleusgen. nov.from species assigned toMacrocoelomaMiers, 1879, whereP. septemspinosusandP. heptacanthusare currently included.
Favoriser l’émergence d’un écosystème d’affaires en tourisme durable
Authors: Van Der Yeught Corinne
Published: May 2020

Malgré l’intérêt suscité par les écosystèmes d’affaires (ESA) en management stratégique, aucune recherche n’a, à ce jour, été menée sur les ESA en tourisme durable. Afin de combler cette lacune, l’article propose d’en définir les contours et les déterminants. Une étude qualitative réalisée auprès des entreprises touristiques de Porquerolles (Parc national de Port-Cros) révèle l’intérêt d’un écolabel certifié par tierce partie accréditée. Ce type de label facilite non seulement l’implémentation du tourisme durable (aux niveaux organisationnel et méta-organisationnel), mais également la création d’une structure d’alignement favorisant l’émergence d’un ESA en tourisme durable, sous certaines conditions relevant de la gouvernance de la destination.
ASDSR: An Adaptive Stable DSR Routing Protocol for Mobile Ad-hoc Networks
Authors: Natoureah Hutaf Salah Al-Deen , Karajeh Huda Abd El-Raheem , Abu Serhan Alaa' Abd El-Aziz
Published: May 2020

Abstract—The process of finding a route between the transmitter and the receiver node in the Mobile Adhoc Networks (MANets) is a renewed issue that is becoming more and more interesting to the researchers as this type of networks  grow and expand. The dynamic nature of MANET and the limited capabilities of wireless nodes in terms of memory size and battery charge are the most important obstacles to the routing (path-finding) process between nodes. In this research, we introduced a new protocol based on the well-known DSR protocol to add a mechanism that controls the RREQ Flooding process, which aims to reach more stable (life-long) routes while reducing the overhead of routing process caused by link breakage between nodes and reduce the overhead of network flooding with RREQ messages with each attempt to find a path. In this proposed mechanism, a specific group is selected from within the devices adjacent to the transmitter to be sent RREQ so that these devices are selected based on the stability evaluation criterion. The stability criterion is calculated based on three weighted factors: the speed of the node, the out-degree value (the number of adjacent nodes), and the number of tracks stored in the device memory. The proportion of devices selected is automatically changed adaptively to ensure that the expected throughput of this network is achieved. The proposed protocol was tested using simulation where results showed that ASDSR proved an enhancement in route stability about (0.13), and a decrease in the number of deleted routes by (9%), while maintaining the expected packet delivery ratio of the original DSR by about (0.86).
Experimental Verification of two Theoretical Solutions of the Pendulum for Large Angles in Frequency Domain for Teaching Support
Authors: Garcés-Gómez Yeison Alberto , López Jimenez Paula Andrea , Cárdenas Delgado Oscar Oswaldo , Henao Cespedes Vladimir , Toro García Nicolás
Published: May 2020

During pendulum analysis, the approximation for small angles is usually performed as a simple harmonic motion. However, for large angles, this approximation is not convenient so exact solutions are proposed by differ-ent methods. This paper presents the comparison of two solutions for the displacement of the pendulum in the domain of time and frequency, the solution by Jacobi elliptic function and the solution by the numerical method Dormand-Prince with the results of measurements obtained by means of a physical prototype designed for the teaching of physics. We consider that this comparative study allows a better understanding of the phenomenon of the non-linear pendulum in the students of undergraduate careers in the physics of waves as well as a previous training for the course of analysis of signals being in good exercise of teaching
Fostering Student’s Critical Thinking through a Virtual Reality Laboratory
Authors: Ikhsan Jaslin , Sugiyarto Kristian Handoyo , Astuti Tiwi Nur
Published: May 2020

Virtual reality (VR) laboratory is great potential for education. It is recognized as a technological advance that can facilitate a learning process through the development of highly realistic 3D visualization. Using VR laboratory in teaching and learning makes it possible to manipulate objects in the virtual scene in a manner similar to the real world. Virtual reality laboratory was developed to enhance the students’ critical thinking skills. A Research and Development (R & D) method with a post-test design was used in the research. The subjects included the students who were enrolled at Senior High School in Yogyakarta, Indonesia with a total of 96 grade 10th students. The samples divided into three classes, namely EC-1 with virtual reality laboratory, EC-2 with virtual reality and real laboratory, and CC with real laboratory while the quality VR was applied to chemistry teachers. The findings of this research reveal that the quality of VR laboratory integrated hybrid learning was in a very good category. The results of students' critical thinking skills were analyzed using ANOVA test and it was found that there is a significant difference on students’ critical thinking skills of the three classes. Students who took part in learning using VR laboratory both in the EC-1 and EC-2 classes had better critical thinking skills compared to the CC class. Thus, the VR laboratory is potentially used for further teaching-learning process.
The Effectiveness of Using Mobile Learning Techniques to Improve Learning Outcomes in Higher Education
Authors: El-Sofany Hosam Farouk , El-Haggar Nahla
Published: May 2020

Recently Mobile technology is considered an effective way to improve students' skills such as positive thinking, collaborative, communication, as well as it is considered the main part of major innovation in many e-learning research areas. As a result of the 21st. century requirements, skills were developed to address the rising needs in higher education which causes a shifting paradigm from the traditional methods of teaching to M-learning. In this research, we discuss the effect of using Mobile learning techniques to improve learning outcomes in Higher Education. We have implemented a web-based survey through two questionnaires. The questionnaires were distributed among 200 students in the second and third levels in the computer science department at both Community College and College of Arts and Science. This research explores a study on e-learning using mobile technology to identify students’ perceptions in the acceptance of mobile techniques and recognize the quality of mobile services for academic and social purposes to improve teaching strategy and learning performance in higher educational organizations. The outcomes of this research would support the evolution of M-learning at the university-level and cause shifting the traditional learning methods by merging M-learning methodologies as a learning management system that provides mobile learning services to students and teachers any time and from any location. The research study shows some important results towards the integration of mobile technology into teaching include: student positive perception, facilitates student concentrate, flexible access to m-services for learning materials, and increases students' skills in using mobile technology for e-learning.
FHL2 Is Essential for Spleen T Cell–Dependent B Cell Activation and Antibody Response
Authors: Ebrahimian Talin , Dierick France , Simon David , Heidari Maryam , Orthwein Alexandre , Mann Koren K , Lehoux Stephanie
Published: May 2020

Four-and-a-half LIM domain protein 2 (FHL2) is an adaptor molecule regulating various cellular processes, including signal transduction, transcription, and cell survival. Although involved in inflammation and immune responses, its role in the germinal center reaction and B cell maturation remains unknown. We found that FHL2−/− mouse spleens displayed enlarged follicles with more B cells. When a T cell–dependent immune response was elicited using SRBC, FHL2−/− germinal center area was enhanced 2-fold compared with wild type (WT), concomitant with expanded dark zones. Nevertheless, the SRBC-induced rise in spleen IgG1 expression, and plasma IgG1 levels observed in WT were absent in FHL2−/− mice, and circulating plasma cells were also reduced in FHL2−/−. This could be explained by deficient upregulation of spleen activation-induced cytidine deaminase mRNA. Interestingly, FHL2−/− B cells successfully underwent class-switch recombination in vitro, and both activation-induced cytidine deaminase induction and IgG1 response to SRBC were equivalent in B cell–deficient μMT mice transplanted with WT or FHL2−/− bone marrow, suggesting that the defects observed in FHL2−/− mice were not B cell intrinsic. However, spleen lysates from FHL2−/− mice revealed a disturbed spleen microenvironment, with reduced CXCL12 and CXCL13 levels compared with WT. Our data suggest that spleen FHL2 expression is essential for a normal germinal center reaction and proper induction of class-switch recombination in response to a T cell–dependent Ag, leading to the emergence of Ab producing plasma cells. This could be due to the regulation of spleen cytokine production by FHL2.
Keratinocyte Dissociation (Desmolysis/Acantholysis) in Ameloblastoma
Authors: Sarode Sachin C. , Sarode Gargi S. , Birur Praveen , Alhazmi Yaser A. , Patil Shankargouda
Published: May 2020

Ameloblastoma is the only odontogenic tumor that displays diversified histomorphological features with subtypes like follicular, plexiform, acanthomatous, granular cell, clear cell, desmoplastic etc. In this paper we presented an extremely unusual presentation of ameloblastoma, which is characterized by desmolysis or acantholysis of stellate reticulum-like cells caused due to keratinocyte dissociation. A 35-year-old male patient presented with a painless hard 3×3 cm swelling in the mandibular right posterior region in the past 4-5 months. Radiographic examination revealed a multilocular radiolucent lesion in the body of mandible with resorption of the roots. Histopathological examination revealed ameloblastic follicles with central cells showing keratinocyte dissociation leading to desmolysis/acantholysis. Desmolytic cells were seen as an isolated entity in the follicular space with round to polygonal shaped morphology. Future retrospective studies on archival samples of ameloblastoma are recommended to relook into identification of such rare phenomenon. This will help in better understanding of the incidence rate and biological behavior of this rare variant of ameloblastoma.
Associations Among Eccentric Hamstrings Strength, Hamstrings Stiffness, and Jump-Landing Biomechanics
Authors: Dewig Derek R. , Goodwin Jonathan S. , Pietrosimone Brian G. , Blackburn J. Troy
Published: May 2020

Context

Anterior cruciate ligament (ACL) injury risk can be assessed from landing biomechanics. Greater hamstrings stiffness is associated with a landing-biomechanics profile consistent with less ACL loading but is difficult to assess in the clinical setting. Eccentric hamstrings strength can be easily evaluated by clinicians and may provide a surrogate measure for hamstrings stiffness.

Objective

To examine associations among eccentric hamstrings strength, hamstrings stiffness, and landing biomechanics linked to ACL injury risk.

Design

Cross-sectional study.

Setting

Research laboratory.

Patients or Other Participants

A total of 34 uninjured, physically active participants (22 women, 12 men; age = 20.2 ± 1.6 years, height = 171.5 ± 9.7 cm, mass = 67.1 ± 12.7 kg).

Intervention(s)

We collected eccentric hamstrings strength, active hamstrings stiffness, and double- and single-legged landing biomechanics during a single session.

Main Outcome Measure(s)

Bivariate associations were conducted between eccentric hamstrings strength and hamstrings stiffness, vertical ground reaction force, internal knee-extension moment, internal knee-varus moment, anterior tibial shear force, knee sagittal-plane angle at initial ground contact, peak knee-flexion angle, knee frontal-plane angle at initial ground contact, peak knee-valgus angle, and knee-flexion displacement using Pearson product moment correlations or Spearman rank-order correlations.

Results

We observed no association between hamstrings stiffness and eccentric hamstrings strength (r = 0.029, P = .44). We also found no association between hamstrings stiffness and landing biomechanics. However, greater peak eccentric strength was associated with less vertical ground reaction force in both the double-legged (r = −0.331, P = .03) and single-legged (r = −0.418, P = .01) landing conditions and with less internal knee-varus moment in the single-legged landing condition (r = −0.326, P = .04).

Conclusions

Eccentric hamstrings strength was associated with less vertical ground reaction force during both landing tasks and less internal knee-varus moment during the single-legged landing but was not an acceptable clinical estimate of active hamstrings stiffness.
Aleatory and epistemic uncertainties can completely derail medical research results
Authors: Indrayan A
Published: May 2020

Aleatory uncertainties are generated by intrinsic factors such as studying a sample rather than the whole population and the source of epistemic uncertainties is extraneous such as limitations of knowledge. These uncertainties inflict all the findings in empirical medical research, but they are rarely appreciated. This article highlights these uncertainties and shows with the help of an example how apparently valid and reliable findings can completely derail due to these uncertainties. We conclude that aleatory and epistemic uncertainties should get due consideration while drawing conclusions and before the results are put into practice. Methods to reduce their impact on results are also presented.
Heat content estimates for the fractional Schrödinger operator $(-\Delta)^\frac {\alpha}{2} + c1_{\Omega}, c > 0$
Authors: Acuña Valverde Luis
Published: May 2020

This paper establishes by employing analytic and probabilistic techniques estimates concerning the
heat content
for the fractional Schrödinger operator

(-\Delta)^\frac {\alpha}{2} + c1_{\Omega}, c > 0

with

0 < \alpha \leq 2

in

\mathbb R^d

,

d \geq 2

and

\Omega

a Lebesgue measure set satisfying some regularity conditions.
Desarrollo e implementación de aplicación móvil para la difusión de publicaciones de la Editorial ULEAM
Authors: Zambrano-Pilay Enrique , Vélez-Vélez Luis , Almeida-Zambrano Edison
Published: May 2020

La publicación y divulgación científica son parámetros que reflejan la calidad de la educación superior, más aún si se fundamentan en herramientas tecnológicas. Es por esta razón que desde la Editorial Universitaria Uleam nace la necesidad de implementar una plataforma móvil que brinde a la comunidad nacional e internacional, contenido científico y conocimientos ancestrales de acceso abierto. El presente proyecto de investigación y desarrollo tecnológico está basado en la creación e implementación de un aplicativo móvil que permitirá visualizar los libros y artículos científicos publicados por la Editorial Universitaria y a su vez difundir entre la comunidad con escaso acceso debido a limitaciones asociadas con la dificultad visual. Esta aplicación móvil se diseñará bajo una plataforma Android y se enlazará con la base de datos de la plataforma institucional SEGUP, en la que se encuentran alojados los textos científicos publicados.

Palabras clave: publicación, aplicación móvil, libros, artículos.
LÜKSEMBURG’DA YÖNETSEL BELGELERE ERİŞİM HAKKI MODELİ ÜZERİNE BİR İNCELEME
Authors: ŞENGÜL Ramazan
Published: May 2020

Bilgi edinme hakkının genel bir hak olarak düzenlenmesi son dönemlerde oldukça yaygınlaşmaktadır. Kamu yönetim faaliyetlerinin toplum tarafından denetlenmesinde ve yönetsel hesapverebilirliğin tesisinde bilgi edinme hakkı oldukça işlevsel etkilere sahiptir. Bununla birlikte bilgi edinme hakkı ile yönetsel şeffaflık arasındaki güçlü bağın kurularak beklenen olumlu etkilerin ortaya çıkması bu hakkın düzenlenme şekline bağlıdır. İsveç modelinden esinlenerek bilgi edinme hakkını mevzuatlarının parçası haline getiren Avrupa Birliği ülkelerinde yapılan hukuki düzenlemeler benzerlikler göstermektedir. Çalışmamızın amacı Lüksemburg’da önceki yıl kanunla düzenlenen yönetsel belgelere erişim hakkına ilişkin modelin işlevselliğini ortaya koymaktır. Belge analizi gerçekleştirilen bu çalışmada belgelere erişim hakkı modelinin içeriği, istisnaları ve bu haktan kaynaklanan uyuşmazlıkların çözüm yolları ile yönetsel şeffaflıkla ilişkisi ele alınmıştır.
HALAL TOURISM: LITERATURE REVIEW AND MAIN SERVICES OF HALAL CONCEPT HOTELS
Authors: GEZER Yusuf , KINGIR Said
Published: May 2020

This article discusses the competence of halal sensitive tourists (HST) to benefit from tourism services without contravening Islamic law. The obligation of halal concept enterprises and the best perception of these obligations by travellers will be discussed. With international research and publications, The Journal has been examined in a broad framework from expert notes along with articles from the Dergipark database. Some uncertainties remain as halal tourism is a new area of study. Halal tourism is still perceived as a "Muslim Hotel” or" hijab hotels " specific to Muslim tourists. Three steps that should be implemented and supported in halal tourism concept applications have been discussed. The first of these is halal food, the second is halal place and the third is the most important steps to be presented in the form of halal entertainment. in addition, certification is the way halal concept applications can provide reliability in attracting and promoting tourists. This article aims to contribute to the institutionalization of halal tourism services. The first step is to establish coordination with halal tourism education institutions by conducting theoretical studies to study this issue more deeply.
3. LOS CAMBIOS GEOHISTÓRICOS, LA ENSEÑANZA GEOGRÁFICAY LA EDUCACION SECUNDARIA EN VENEZUELA, DESDE EL SIGLO XIX AL XX
Authors: Santiago Rivera (ULA) José Armando
Published: May 2020

El propósito este trabajo es analizar la enseñanza de la geografía facilitada en la educación secundaria, desde el Colegio Nacional, el Liceo Tradicional al Liceo Bolivariano en el marco de los cambios geohistóricos de Venezuela, entre el siglo XIX al siglo XX. Se asume que en la evolución histórica de las citadas instituciones, la labor formativa de la enseñanza geográficase ha centrado en transmitir contenidos programáticos, desde la perspectiva geográfica descriptiva, la pedagogía tradicional y el desfase de las condiciones del momento histórico. Esta problemática determinó metodológicamente, realizar una revisión bibliográfica para estructurar un planteamiento sobre las condiciones del momento histórico, la institución secundaria y la práctica de la enseñanza geográfica de las asignaturas geográficas. Por tanto, se concluye que en la educación secundaria se deben promover cambios acordes con la innovación paradigmática y epistemológica, los avances teóricos y metodológicos del currículo, la ciencia geográfica, la pedagogía y la didáctica para adecuar su labor formativa a la explicación analítica de los acontecimientos geográficos y las necesidades de la sociedad, ante los desafíos del mundo contemporáneo.
1. Proceso de Acompañamiento en Investigación en el Nivel de Pregrado desde la Experiencia de Tutores Académicos
Authors: Gamero Mujica (UNEFM) Maricarmen Balbina
Published: May 2020

El presente artículo corresponde a un informe de investigación cualitativa, enfocado en el proceso de acompañamiento en investigación, el cual atañe a las acciones, tanto de orientación, mediación y entrenamiento en investigación, como a las de apoyo psicosocial, liderado por un tutor, quien atiende a las características y necesidades académicas y personales de cada tutorado dentro de un marco institucional definido. La intencionalidad de la investigación fue develar la actuación de tutores académicos durante dicho proceso desde su propia experiencia en el nivel de pregrado. Se empleó un enfoque introspectivo-vivencial; en este sentido, el diseño se enmarcó en la etnometodología a la par que la estrategia para el acopio de información fue la observación participante. Los hallazgos muestran que las sesiones de acompañamiento se llevan a cabo entre fases: preámbulo, abordaje del objeto de estudio y cierre, realizadas con base en la producción de contenido que haya realizado el tutorado.