bluuebunny/crossref_metadata_2025_split huggingface dataset:
CONCRETE COMPOSITES USING GRAND-SANDY MIXTURES OF DEPOSITS OF THE CHECHEN REPUBLIC
Authors: Alaskhanov A. Kh. , Murtazaev S.-A. Yu. , Saidumov M. S. , Khubaev M. S.-M. 
Published: August 2019

Objectives Development of optimal recipes of concrete mixtures using local natural raw materials in the form of gravel-sand mixtures from deposits of the Chechen Republic.Method The research methods adopted in the work are based on the theoretical principles and laws of designing and optimizing polydisperse multicomponent systems, the phase and structure formation of clinker minerals, the logic of mathematical calculations, the technological features of the structure formation of composite masses, the theoretical principles of controlling the rheological processes of mixes. All experimental data presented in the work were obtained according to the methods of current regulatory documents (GOST, recommendations, etc.).Result The paper presents the results of a study of the composition and properties of sand and gravel mixtures of deposits of the Chechen Republic and concretes based on them. In particular, the granulometric and chemical compositions and the physicomechanical properties of sand and gravel mixtures have been studied. An analysis of the scientific literature and experience in the use of sand and gravel in construction. The leading scientific schools of the country and abroad in the field of concrete science are presented. The rheological indices of concrete mixes were studied and the dynamics of the curing of concrete of different classes were obtained on the basis of unfortified sand and gravel mixtures in the presence of a chemical additive, the superplasticizer Polyplast SP-1.Conclusion It is proposed to use sand-gravel in its natural form in concrete for non-critical structures in its natural form without additional costs for enriching its composition. The feasibility of obtaining low-grade concrete with the use of sand and gravel mixtures without its enrichment and fractionation is established.
EFFECT OF DOSAGE OF REDISPUTABLE POWDERS AND THE TYPE OF LOW-MODULAR INCLUSIONS ON THE PROPERTIES OF FINE-AGGREGATE CONCRETE
Authors: Dolgova A. V. , Nesvetaev G. V. 
Published: August 2019

Objectives Reliability and durability of structures using materials with various properties (plaster coatings, cement glue, new concrete during repair and restoration of structures, etc.) largely depends on the adhesion of the layers and the deformation properties of the coatings. To obtain the required properties of materials used for coatings, modifiers based on polymers and low-modulus inclusions are introduced into the composition of new concretes, for example, entrained air. The aim of the work is to identify some patterns of change in the properties of concrete with the joint introduction of these modifiers.Method Experimental determination of the tensile strength in bending, compression, E-modulus, adhesion to the concrete base by standard methods.Result The influence of separate and joint introduction of dispersible polymer powders and various low-modulus inclusions into the composition of fine-grained concrete has been established.Conclusion The joint introduction to the composition of fine-grained concrete of various low-modulus inclusions and redispersible polymer powders provides a reduction in the stress level during forced deformations due to the different effects additives on the strength and deformation properties and contributes to increased adhesion to the concrete.
MODELS FOR DETERMINING MAXIMUM DEGREE FILLING CHANNELS OF CIRCULAR SECTION SHAPE
Authors: Alibekov A. K. , Аlibekov G. A. 
Published: August 2019

Objectives The task was to obtain a model for determining the maximum possible degree of filling the circular section channels in the earthen channel based on the condition of ensuring the stability of slopes and the minimum volume of excavation during their construction, as well as finding the optimum degree of filling fortified channels of a closed profile corresponding to maximum throughput.Method In work analytical methods of differential calculus and the solution of implicit equations are used.Result The experience of domestic and foreign researchers was taken into account to solve the set tasks, select research methods and criteria for optimizing channel parameters. Two cases of circular-shaped channels are considered: 1) in the earth channel, 2) reinforced with a closed transverse profile. For the case of a hydraulically most advantageous circular channel in the earthchannel channel, equating the first derivative of the equation of a circle with the reciprocal of the allowable embedding coefficient of the slopes obtained an analytical solution for determining the maximum degree of filling from the slope stability condition, which was not dependent on hydraulic flow elements. In the case of non-cohesive soils that form the channel, the circular channel can be filled to a depth not exceeding 20 percent of the channel radius. At the same time, the average flow rate should remain in the range from non-venting to non-blurring. In order to be able to determine the flow rate, analytical expressions are given for finding hydraulic flow elements in a circular channel. When determining the volume of excavation for the construction of the channel, the excess of the channel edge above the maximum water level in the channel was taken into account. For the case of a fortified channel of a closed transverse profile, by taking the derivatives from the Chezy formula, we obtained the optimal values of flow rate and average velocity.Conclusion A fortified closed circular profile channel has a maximum capacity with a relative degree of filling of 0.938, and the maximum average velocity of a fluid in a pressureless channel is achieved with a degree of filling of 0.815. To determine the maximum permissible relative degree of filling in the case of a circular section channel in the earthen channel, analytical dependences were obtained, before using which, according to the reference literature, it is necessary to take the value of the slope coefficient for this type of channel bed soil.
VERBAL MODEL OF MANAGEMENT OF A VULNERABLE PROCESS OF DEDICATING THE ACCESS OF USERS TO THE SOFTWARE OF THE ELECTRONIC DOCUMENT SYSTEM
Authors: Alferov V. P. , Drovnikova I. G. , Obukhova L. A. , Rogozin E. A. 
Published: August 2019

Objectives Traditional methods for solving the problem of protecting the information resource of electronic document management systems based on protective basic functions (identification, authentication and verification of users, etc.) of available tools and information security subsystems have a significant drawback - inefficiency when an attacker masters the password of regular users. In order to eliminate it, it is necessary to develop new methods related to managing the weakly vulnerable process of delimiting user access not only to confidential information, but also to the software of the electronic document management system.Method One way to solve this problem is to use the modified “soft administration” method, which consists in automatically generating lists of allowed source files in the authorization matrix by reducing the lists and comparing file integrity functions with a reference list for an existing software package. This allows you to automate the process of developing access control rules and provide management of the weakly vulnerable process of access control to software tools of the electronic document management system.Result A verbal model is developed for automated control of a weakly vulnerable process of differentiating access to software tools of an electronic document management system, and a system of performance indicators for the functioning of a promising subsystem for protecting confidential information characterizing it as a control object is proposed.Conclusion The presented verbal model provides for the possibility of distributed control, in which the security administrator directly controls the specified process using a remote software tool. The formation (change) of the authority establishment matrix for managing a weakly vulnerable process of access control using a promising subsystem for protecting confidential information and the development of a system of indicators to comprehensively evaluate the effectiveness of its functioning is one of the most important tasks of protecting information from unauthorized access, guaranteeing the implementation of a security policy throughout the entire operation period secure electronic document management system.
The Role of the Energy Charter Treaty in Fostering and Promoting Energy Efficiency and Sustainable Development
Authors: Masumy Naimeh 
Published: August 2019

The paper aims to critically analyze whether the Energy Charter Treaty (hereafter “ECT”) can be considered a viable instrument to foster and safeguard the concept of sustainable development, whilst simultaneously promoting foreign investment. First, an overview of the investment protection regime under ECT will be set out, assessing whether or not the ECT ensures that investments are in line with environmentally sound practices. Secondly, this study examines whether references to energy efficiency and environmental concern could signify that this treaty does not only place importance on investment protection, but also considers energy efficiency an equally important objective. Subsequently, this paper will argue that whilst the ECT can be read as promoting sustainable development, this goal is often not realized when the ECT provisions are applied in reality. Finally, the article will propose some reforms that could be made to the ECT which ensures observing key issue related to energy efficiency and sustainable development.
Evaluación de la resistencia bacteriana frente a tres antibióticos usados en la maduración del camarón marino (Litopenaeus vannamei).
Authors: Luna G. Diana , De León L. Jorge , Vallejo I. Adriana , Velásquez L. Gustavo 
Published: August 2019

La incidencia de las enfermedades bacteriana en camaronicultura, ha conducido a la utilización de terapéuticos, con el subsecuente problema de generación de resistencia a mediano y largo plazo, afectando la producción. Con el objetivo de evaluar la resistencia bacteriana en un sistema de maduración de Litopenaeus vannamei , fueron aisladas 18 cepas bacterianas correspondientes a V. parahaemolyticus (n=3), V. alginolyiticus (n=5), V. hollisae (n=5) y Flavobacterium spp. (n=5). La resistencia a antibióticos oxitetraciclina, trimetoprim-sulfa y ciprofloxacina, fueron evaluados siguiendo la metodología de Kirby-Bauer; la concentración mínima inhibitoria (MIC) se determinó según los métodos normalizados (Comité Nacional para las Normas de Laboratorio Clínico – NCCLS). El 66% de las cepas de V. parahaemolytucus , resultaron resistentes a la oxitetraciclina con una MIC entre 7.81 y 15 µg.ml -1 . El 40% de las cepas de V. hollidae presentaron

resistencia a este antibiótico con una MIC entre 3.9 y	7.81	µg.ml -1	para	trimetrprim-sulfa	y concentraciones entre 0.06 y 0.25 µg.ml-1 para ciprofloxacina. Como conclusión se advierte en este estudio la resistencia a la oxitetraciclina en las cepas de V. arahaemolyticus y V. hollisae , potencialmente patógenas para camarones. Tanto trimetoprim – sulfa como ciprofloxacina resultaron ser efectivos para la inhibición de todas las cepas bacterianas evaluadas; no obstante trimetroprim-sulfa requirió dosis hasta de 8µg.ml -1 , situación que hace poco práctico su uso por los costos y el riesgo de generar resistencia. Se recomienda el uso de ciprofloxacina solamente para casos especiales con el fin de evitar el desarrollo de cepas bacterianas resistentes arriesgando la salud pública	veterinaria.	Se	sugiere	estudios complementarios para otros antibióticos de uso en la Acuicultura.
Intraindividual Variability Measurement of Fine Manual Motor Skills in Children Using an Electronic Pegboard: Cohort Study
Authors: Rivera Diego , García Antonio , Ortega Jose Eugenio , Alarcos Bernardo , van der Meulen Kevin , Velasco Juan R , del Barrio Cristina 
Published: August 2019

Background
Pegboard tests are a powerful technique used by health and education professionals to evaluate manual dexterity and fine motor speed, both in children and adults. Using traditional pegboards in tests, the total time that, for example, a 4-year-old child needs for inserting pegs in a pegboard, with the left or right hand, can be measured. However, these measurements only allow for studying the variability among individuals, whereas no data can be obtained on the intraindividual variability in inserting and removing these pegs with one and the other hand.

Objective
The aim of this research was to study the intraindividual variabilities in fine manual motor skills of 2- to 3-year-old children during playing activities, using a custom designed electronic pegboard.

Methods
We have carried out a pilot study with 39 children, aged between 25 and 41 months. The children were observed while performing a task involving removing 10 pegs from 10 holes on one side and inserting them in 10 holes on the other side of a custom-designed sensor-based electronic pegboard, which has been built to be able to measure the times between peg insertions and removals.

Results
A sensor-based electronic pegboard was successfully developed, enabling the collection of single movement time data. In the piloting, a lower intraindividual variability was found in children with lower placement and removal times, confirming Adolph et al’s hypothesis.

Conclusions
The developed pegboard allows for studying intraindividual variability using automated wirelessly transmitted data provided by its sensors. This novel technique has been useful in studying and validating the hypothesis that children with lower movement times present lower intraindividual variability. New research is necessary to confirm these findings. Research with larger sample sizes and age ranges that include additional testing of children’s motor development level is currently in preparation.
Presidential Power, Vetoes, and Public Policy: a Comparative Study between Brazil and the United States
Authors: Hebling Matheus Lucas , Contrera Flávio 
Published: August 2019

<p><strong>[Poder presidencial, vetos y política pública: Un estudio comparativo de Brasil y Estados Unidos]</strong></p><p><strong>ABSTRACT</strong></p><p>Much of the literature on Presidentialism focuses on the argument that bipartisan presidential systems are better able to avoid a conflictive Executive-Legislative relationship by facilitating the formation of coalitions in Congress and partisan ideological identification. From a comparative perspective, this study aims to identify and discuss the ability of the presidents of the United States and Brazil to promote public policy, and to examine the degree of conflict in the drafting of these policies by studying legislative vetoes. In addition, it analyzes the success rate of welfare bills voted in the lower chamber of the two countries and supported by their respective presidents. The period studied here covers 16 years (from 1995 to 2010 in Brazil and in the United States from 1993 to 2008), consisting of eight years of more liberal administrations and eight years of more conservative ones in each country. The presented hypothesis is that there is no significant difference between two-party or multi-party systems in terms of conflict, public policy drafting and presidential success rate. The data are analyzed using multivariate regressions and undergo qualitative treatment for a deeper understanding.</p><p><strong>RESUMEN</strong></p><p>Gran parte de la literatura sobre el presidencialismo se centra en el argumento de que los sistemas presidenciales bipartidistas son más capaces de evitar una relación conflictiva entre ejecutivo y legislativo al facilitar la formación de coaliciones en el Congreso y la identificación ideológica partidista. Desde una perspectiva comparativa, este estudio tiene como objetivo identificar y discutir los poderes de los presidentes de los Estados Unidos y Brasil para promover políticas públicas y verificar el grado de conflicto en la producción de dichas políticas mediante el control de los vetos legislativos. Analiza también la tasa de éxito de los proyectos de leyes de políticas de bienestar votadas en la cámara baja de los dos países y respaldados por sus respectivos presidentes. Abarca un período de 16 años (de 1995 a 2010 en Brasil y en los Estados Unidos de 1993 a 2008), con ocho años de administraciones más liberales y ocho años de gobiernos más conservadores en cada país. La hipótesis es que no hay una diferencia significativa con respecto al conflicto y la producción de políticas públicas en sistemas bipartidistas o multipartidistas y que las tasas de éxito son similares. Los datos se analizan mediante regresiones multivariables y se someten a un tratamiento cualitativo para una comprensión más profunda.</p>
Simple theoretical proposal of the dependence of the deGennes extrapolation parameter with the surface temperature of a superconducting sample
Authors: Barba-Ortega José José , González Jesús D. , Rincón-Joya Miryam 
Published: August 2019

The Time-dependent Ginzburg–Landau model (TDGLM) is a robust tool widely used to analyze the magnetization of the single-vortex state of a mesoscopic superconducting sample in presence of a magnetic field. The algorithm implemented in this work is applied to a square geometry surrounded by diﬀerent kinds of materials simulated by deGennes extrapolation length . The inside of the sample remains at constant temperature , while its boundary remains at temperature . This temperature variation in the sample can be generated by a continuous laser wave injected into all the internal points, except for a thin surface layer in the boundary of the material. We found that the b value at , which mimics the magnetization curve for a corresponding , presents a linear dependence with the temperature. Therefore, although within the domain of validity TDGLM the parameter is to be considered temperature-independent in the vicinity of the bulk critical temperature and that depends on the density of states near the surface, we propose a simple dependence of using a TDGLM.
Referentes identificatórios e jogos identitários no candomblé
Authors: Nunes Mônica de Oliveira 
Published: August 2019

Nesse artigo, evidenciamos um conjunto de “referentes identificatórios” presentes no idioma do Candomblé e apresentamos uma discussão sobre as formas pelas quais as pessoas utilizam esses elementos para construir suas identidades de forma progressiva e flexível. Para tanto, retomamos alguns pontos de análise acerca da construção da pessoa no Candomblé a partir de autores clássicos, destacando o que dados etnográficos produzidos na cidade de Cachoeira, Bahia, apontam de inovador em relação aos mesmos. Apresentamos uma primeira polêmica entre unicidade e multiplicidade do eu no Candomblé, inserindo-a em uma discussão filosófica acerca de como várias culturas produzem diferentes metáforas para darem conta de uma provavelmente universal “ilusão de totalidade”. Em seguida, identificamos mecanismos de individuação no interior de uma sociedade predominantemente sócio-cêntrica. Finalmente, apresentamos novos significantes religiosos que não são habitualmente explorados em análises acerca de jogos identitários no Candomblé, enfatizando importância da subjetividade dos adeptos na construção desses jogos.
LATIM, BIQUÍNI E SINFONIA DISCORDANTE: LÍNGUAS CLÁSSICAS E METODOLOGIA DE ENSINO
Authors: Marcant Engelsing Eduardo 
Published: August 2019

Neste artigo se discute a visão que os profissionais de Letras têm do latim e do ensino de línguas Clássicas. Baseando-se na noção de que o que faz uma língua são capacidades inatas e individuais do ser humano – e não o uso dessa língua entre indivíduos e em comunidade – o estudo de latim se encerra na leitura de textos escritos entre dois a quatros séculos, em oposição a mais de dois milênios de uso do latim, e o ensino de língua é individualista e formalista, em oposição ao social e participativo. Se propõe que uma concepcão mais ampla de língua e a noção de aprendizagem como crescente participação em atividades letradas podem transformar o estudante, de titubeante leitor de poucos autores, em ativo participante da comunidade que se extende por vários territórios do globo e abarca a produção de vinte séculos de história: a produção mais ampla, mais diversificada, mais influente na história social e literária dos homens.
YAKA, DE PEPETELA: UMA SAGA FAMILIAR E UMA RELEITURA DA HISTÓRIA DE ANGOLA
Authors: Santos Donizeth Aparecido 
Published: August 2019

O artigo apresenta uma abordagem do romance Yaka, do escritor angolano Pepetela, no qual, através da articulação entre literatura e história, o romancista entrelaça a história individual da família Semedo com a história do desenvolvimento político e social de Angola, num período que começa em 1890 e se estende até 1975. Por meio de uma representação literária típica do romance histórico tradicional, o autor recupera a singularidade histórica de uma época atravessada por diversas crises históricas e políticas provocadas por fatores de ordem econômica e pelos constantes conflitos entre colonos portugueses e nativos angolanos. Através do uso da saga familiar como estratégia narrativa, Pepetela realiza uma análise da sociedade colonial e faz uma releitura da história do país, dando voz a tudo aquilo que foi silenciado e obscurecido pela historiografia oficial portuguesa.
PARCOURS MEMORIELS AMERINDIENS ET GEOPOETIQUE DES CONFINS - AMERINDIAN MEMORIAL ITINERARIES AND GEOPOETICS OF THE CONFINES
Authors: Olivieri Godet Rita 
Published: August 2019

RESUME : Il s’agit d’interroger les figurations des rapports des Amérindiens au continent américain dans des textes littéraires qui ont recours à la mémoire pour mettre en scène des « territoires lointains » et leurs populations autochtones: les territoires nordiques du Canada (Chants polaires de Jean Morisset, 2002) ; la forêt amazonienne (Yuxin-Alma de Ana Miranda, 2009) ; la Terre de Feu (Luna roja de Leopoldo Brizuela, 2002). De l’extrême-Nord à l’extrême-Sud du continent américain, en passant par la forêt amazonienne, c’est la construction imaginaire de la conception de « confins », renvoyant à la dichotomie entre civilisation et terres sauvages, qu’il nous intéresse d’examiner tout en soulignant les modalités spécifiques d’appropriation des éléments d’une mythologie de l’espace américain mises en place par les différents textes littéraires. MOTS CLES : mémoire, Amérindiens, confins, espace américain ABSTRACT: The representations of American Indians relationship to the American continent are investigated in literary texts that use memory to stage the "distant lands" and their indigenous peoples: the northern territories of Canada (Chants Polaires by Jean Morisset, 2002); the Amazonian forest (Yuxin-Alma by Ana Miranda, 2009); Tierra del Fuego (Luna roja by Leopoldo Brizuela, 2002). From the far north to the far south of the American continent through the Amazon forest, we are interested in the imaginary construction of the conception of "confines", referring to the dichotomy between civilization and wilderness, while emphasizing the specific modalities of appropriation of elements of a mythology of the American space implemented by the various literary texts. KEYWORDS: memory, Amerindians, confines, American space