bluuebunny/crossref_metadata_2025 huggingface dataset:
Um olhar sobre o processo de paz Israel-Palestina e a problemática da terra no documentário Promises (2001)
Authors: Lodos Claudinei
Published: June 2019

O processo de paz entre israelenses e palestinos, ocorrido na década de 1990, está representado no documentário estadunidense Promises (2001). A questão da posse da terra apresenta destaque no filme através das vozes de crianças árabes e judias que debatem sobre os seus direitos de pertencimento. Neste artigo, demonstramos a representação do conflito pelo documentário, destacando a problemática da terra e considerando a contextualização histórica do período em que o documentário foi produzido.
EXPERIMENTAL DETERMINATION OF CONVECTIVE HEAT TRANSFER COEFFICIENTS IN THERMAL BUOYACY VENTILATION SYSTEM
Authors: Abramkina D. V. , Abramyan A. A. , Shevchenko-Enns E. R.
Published: June 2019

Objectives. The main goal of the article is to present the developed method for the experimental determination of convective heat transfer coefficients, suitable for studying the internal convection of models of complex configuration. Method. The study of free convection under the conditions of an internal problem was carried out by determining the conditional thickness of the boundary layer by a graphic method. The first was the selection of the calculated sections and planes for the experimental installation. The selection is carried out in such a way that the calculated planes are perpendicular to the heated walls of the channel in question. Installation of an experimental model is possible only in a room with low internal air mobility, as well as a stable temperature. In this room there should not be heating and heating devices that can create strong convective currents near the channel of the experimental installation. Result. The article presents the results of an experimental study to determine the temperature distribution of the air flow and average convective heat transfer coefficients over the height of the ventilation channel. A decrease in convective heat transfer coefficients at an altitude of 0.5 to 1 meter occurs less noticeably than at an altitude of 1 to 2 meters, which is associated with the restoration of flow after a vent removal. At the stabilization section, there is first a gradual decrease, and then an increase in axial velocity, which is caused by the merging of multidirectional air flows in this area. Conclusion. It was revealed that in the case of modeling free convection under the conditions of an internal problem in the presence of heat-removing boundaries  within the limits of the calculated temperature difference, taking into account the flow turbulization has practically no effect on the final results.
INVESTIGATION OF THE CARRYING CAPACITY OF REINFORCED CONCRETE SLABS WITH CRACKS AFTER THEIR REINFORCEMENT WITH COMPOSITE FABRICS BY THE FINITE ELEMENT METHOD USING THE PRINS COMPUTER COMPLEX
Authors: Agapov V. P. , Aydemirov K. R.
Published: June 2019

Objectives. The finite element method for cracked reinforced concrete slabs analysis after they were reinforced with composite fabrics in order to determine the residual safety factor is considered.Method. The method is based on the use of algorithms for calculating of structures with the account of the geometrical and physical nonlinearities, implemented in the PRINS program. These algorithms assume the use of the same calculation scheme in the process of the problem solving. However, the specifics of the assigned problem is that the design sсheme of the structure before the appearance of defects in it and after its amplification with the help of composite materials should change.Result. Taking into account this circumstance, the algorithms of nonlinear calculation of structures under the PRINS program were supplemented with an option that allows changing the parameters of the design scheme in the process of through calculation. To study the bearing capacity of reinforced concrete slabs, multilayer finite elements are used, for each of which a specific package of materials is specified. Modernization of the design scheme in this case comes down to replacing one package of materials with another. An example of calculation of a slab with a crack reinforced with composite fabric is given.Conclusion.It is shown that the use of a tunable design scheme can significantly improve the accuracy of calculations. In this case, the final result depends on what stage of the formation of defects in the slab its strengthening is realized. The special  multilayered finite elements of a quadrangular shape are used in calculations. The elements consist of four simple triangles, for which most of the matrix characteristics are calculated in a closed form. This is especially important when carrying out nonlinear calculations that require repeated computations of these characteristics.
STRESSED STATE OF A SYSTEM OF THREE PARALLEL TUNNELS WITHOUT DRAWING FROM OWN WEIGHT OF AN ANOTROPHONE ROCK MASSIF
Authors: Bautdinov D. T. , Djamaludinov M. M. , Zhukova K. S.
Published: June 2019

Objectives. The aim of the study is to carry out a parametric analysis of the stress state of an anisotropic rock massif on the contours of the workings of a system of three parallel circular tunnels without lining due to the mass of the massif, for various ratios of the elastic characteristics of the rock massif in orthogonal directions, and at different distances del transverse isotropic medium. Method. The calculation of a system of three parallel tunnels without a large extension lining, laid in a strong transversely isotropic rock massif, is reduced to the problem of plane deformation of the theory of elasticity for a transversely isotropic medium containing parallel workings. A model of a transversely isotropic medium (a special case of an anisotropic medium) is used, in which the rock massif in one plane has the characteristics of an isotropic medium (the isotropy plane), and in the perpendicular direction, characteristics different from the isotropic medium. The stress state was investigated by the finite element method using the ANSYS software package. The sizes and type of the finite element suitable for calculation on the basis of the solution in the program complex of the verification task were previously determined. The Kirsch problem was accepted as the verification problem. Result. The relative tangential stresses on the contours of three parallel tunnels were determined depending on the degree of anisotropy of the rock mass and depending on the distance between parallel tunnels. The influence of the distance between the tunnels on the stress state on the contours of three parallel tunnels was evaluated, depending on the degree of anisotropy.Conclusion. The results of a parametric analysis of the system of three parallel free-flow tunnels without lining, depending on the degree of anisotropy of the rock mass and the distance between the tunnels, show that the stress state is significantly affected by the degree of anisotropy of the elastic properties of the soil massif and the distance between the tunnels. When designing underground structures, it is necessary to take into account the anisotropy of the elastic properties of the soil mass. It is also necessary to determine in more detail the physical and mechanical properties of rocky soils and pay special attention to elastic characteristics. As studies have shown, taking into account transverse-isotropy and the distance between the tunnels leads to both an increase and a decrease in tangential stresses on the contours of parallel tunnels. At some ratios of elastic characteristics in orthogonal directions, regardless of the distance between the tunnels, there are no tensile stresses on the contours of the tunnels, which favorably affects the operation of the hydraulic tunnel.
THERMOELECTRIC DEVICE FOR TREATMENT PANARIATION
Authors: Dvorjanchikov V. I. , Magomedov D. A. , Magomedova K. A. , Mispahov I. Sh.
Published: June 2019

Objectives The aim of the study is to develop a thermoelectric device for the treatment of felon, its mathematical modeling, experimental tests of the laboratory model of the device, the study of thermal processes occurring in it. Method. A design of a thermoelectric device for the treatment of felon, providing the possibility of both uniform and contrasting therapeutic heat effects on the fingers is proposed. Result. A mathematical model of the device has been developed, implemented on the basis of solving a non-stationary two-dimensional heat conduction problem for a system of complex configuration with boundary conditions of the second and third kind. Experimental studies of the device were carried out on a specially designed test bench for checking the adequacy of the mathematical model. A two-dimensional non-stationary heat conduction problem was solved for a complex system with a rectangular geometry of fragments and heat sources. The temperature change of various points of the “device-object” system of exposure in space and in time at various values of the cooling and heating capacity of a thermoelectric battery (TEB) was studied. Comparison of calculated and experimental data. Conclusion. The results of research have shown the effectiveness of the use of the developed device for the implementation of thermal procedures in the treatment of felon in terms of efficiency, versatility, impact reliability, comfort and accuracy of maintaining temperature conditions. It is shown that it is possible to increase the efficiency of the device using a combination of thermopile operation modes (maximum cooling capacity and maximum coefficient of  performance), as well as improving the intensity of heat removal from its reference junctions.
Statistical analyses of morphological variation in the Gymnopodium floribundum complex (Polygonaceae): definition of three subspecies
Authors: Ancona Juan José , Ortiz-Díaz Juan Javier , De Luna Efrain , Tun-Garrido Juan , Barrientos-Medina Roberto Carlos
Published: June 2019

Background and Aims: Morphological variability in Gymnopodium floribundum along its distribution area has been the source of taxonomic and nomenclatural inconsistencies, sometimes recognizing up to three species and two varieties. In this paper we present morphometric analyses of variation in 224 specimens of G. floribundum in order to determine the existence of morphological patterns that correspond to geographically structured phenotypic diversity.Methods: The data matrix consisted of 224 specimens and 32 characters, 21 were quantitative and 11 qualitative. A dendrogram was estimated with UPGMA’s algorithm and the Gower´s coefficient. The 21 quantitative characters were subjected to principal components analysis. With the groups identified in the dendrogram, we performed a PERMANOVA using all quantitative characters. Canonical Variate Analyses of leaf shape and perianth segment shape of all specimens were executed.Key results: The results of multivariate analyses suggest the existence of three phenetic groups, which mostly correspond to three geographic regions: Belize, the Pacific Coastal Plain and the Yucatán Peninsula. These groups are distinguished by the presence or absence of indument on leaf blade, ochrea and petiole, the distances between the floral fascicles, and the length and width of the external and internal segments of the perianth. Two of the geographic groups correspond to infraspecific taxa previously recognized by Standley and Steyermark. Our distances and shape morphometric analyses uncover a third group from the southern Pacific region which presents novel characters.Conclusions: Based on these results we raise the rank of two varieties G. floribundum var. antigonoides and G. floribundum var. floribundumto subspecies, and propose to recognize a new third subspecies: Gymnopodium floribundum subsp. chiapensis.
Testing the parent-child communication program: Its effectiveness on developing children’s social competences
Authors: Mulyanto Agus , Razak Alifah Indalika Mulyadi
Published: June 2019

Social competence has a central role in the development of early childhood. One of the central roles of children's social competence is its influence on children's academic social abilities, such as the ability to (1) receive learning information, (2) follow the school’s rules, and (3) face increasingly complex academic challenges along with increasing school levels. This study aims to test the model of parent-child communication (PCC) in developing children’s social competence. The exclusive communication model was tested to 250 children aged 4-6 years in West Java Province,  which is divided into five research zones, West Java Zone 1 to 5. This study used an experimental design pre-test and post-test to determine the effectiveness of the parent-child communication program that was tested through observation and interview techniques consisting of 68 items of social competence. The results show that the PCC Program can effectively be applied by the collaboration of parents between fathers and mothers to optimize children's social competencies. The PCC program, which was not attended by both parents, would not be effective, for example, as happened in the West Java Zone 1, indicating the ineffectiveness of the PCC program because of the characteristics of parental activities that both work and do not have time to communicate with children. While in the other four West Java Zones PCC can be effective, because working parents want to take the time to interact and communicate actively with their children.
Developing psychomotor evaluation instrument of biochemistry practicum for university students of biology education
Authors: Puspitasari Etika Dyah , Susilo Mohamad Joko , Febrianti Novi
Published: June 2019

Practicum is one of the important aspects of the learning of biology. There is no psychomotor evaluation instrument that is valid and reliable. This study is aimed at developing a valid and reliable psychomotor evaluation instrument for biochemistry practicum. The study is developmental research using the 4-D model of ‘define, design, develop, and disseminate’. Instrument validation was carried out through construct validation. The findings show that the developed instrument is characterized by a high level of construct validity although the reliability measure is not very well-estimated. The instrument is constructed of four factors of perception, set, guided response, and mechanism developed into 80 statement items.
Methods used by mathematics teachers in developing parallel multiple-choice test items in school
Authors: Pramudita Kartika , Rosnawati R. , Mam Socheath
Published: June 2019

The study was aimed at describing five methods of the development of parallel test items of the multiple-choice type in mathematics at Yogyakarta (primary education level). The study was descriptive research involving 22 mathematics teachers as the respondents. Data collection was conducted through interviews and document reviews concerning the developed test packages. A questionnaire was used to gather data about the procedure the teachers employed in developing the tests. Findings show that the teachers used five methods in developing the test item; namely (1) randomizing the item numbers; (2) randomizing the sequences of response options; (3) writing items using the same contexts but different figures; (4) using anchor items; and (5) writing different items based on the same specification table. All of the respondents stated that they developed the table of the specification before developing the test items and that most of them (77%) did the validation of the instruments in content and language.
An analysis of Javanese language test characteristic using the Rasch model in R program
Authors: Muchlisin Muchlisin , Mardapi Djemari , Setiawati Farida Agus
Published: June 2019

One skill required to solve a problem in the 21st century is communication. Two international languages that are important in communication and thought at school are English and German language. However, beside international language, the local language, such as the Javanese language, is also essential and need to be maintained. The purpose of this study is to analyze the Javanese language test characteristics. This study was explorative research with secondary data collected by documentation of 220 students responses to the 50 multiple choice item of Javanese language test in the 11th grade of vocational high school. Data were analyzed using the Rasch model assisted by R program. Rasch model fits the data with 42 items after three times calibration. Based on difficulty level, ICC, and items reliability, there were 28 of 42 items (66.67%) that were good. This study finds out that generally, the Javanese language test is in the moderate category of difficulty. Hence, the need of evaluating the Javanese language test to make a better test that gives more accurate information about examinees' ability is crucial. The evaluation of the Javanese language test can be used to plan the next learning to get better Javanese language learning.
Cigarette Packs With URLs Leading to Tobacco Company Websites: Content Analysis (Preprint)
Authors: Weiger Caitlin Victoria , Smith Katherine , Hong Amy Y , Cohen Joanna E
Published: June 2019

BACKGROUND

Tobacco companies include on the packaging of their products URLs directing consumers to websites that contain protobacco messages. Online media tend to be underregulated and provide the industry with an opportunity to present users with protobacco communication.

OBJECTIVE

The objective of our study was to document the content of websites that were advertised on tobacco packs in 14 low- and middle-income countries.

METHODS

We purchased tobacco packs from 14 low- and middle-income countries in 2013 and examined them for the presence of URLs. We visited unique URLs on multiple occasions between October 1, 2016 and August 9, 2017. We developed a coding checklist and used it to conduct a content analysis of active corporate websites to identify types of protobacco communication. The coding checklist included the presence of regulatory controls and warnings, engagement strategies, marketing appeals (eg, description of product popularity, luxury/quality, taste), corporate social responsibility programs, and image management. We coded brand websites separately and also described social media and other website types.

RESULTS

We identified 89 unique URLs, of which 54 were active during the search period. We assessed 26 corporate websites, 21 brand websites, 2 nontobacco websites, and 5 social media pages. We excluded 2 corporate websites and 14 brand websites due to limited accessible content or incomplete content. Corporate social responsibility was discussed on all corporate websites, and marketing appeals were also common. Corporate websites were also more likely to include more nonspecific (12/24, 50%) than specific (7/24, 29%) health warnings. Promotions (6/7, 86%) and sociability appeals (3/7, 43%) were common on brand websites. The small number of social media webpages in our sample used gendered marketing.

CONCLUSIONS

URLs appearing on tobacco packs direct consumers to websites where users are exposed to marketing that highlights the “positive” contributions of tobacco companies on corporate websites, and extensive promotions and marketing appeals on brand websites and social media pages. It is essential that marketing regulations become more comprehensive and ban all protobacco communication, a policy that is in line with articles 5.3 and 13 of the World Health Organization Framework Convention on Tobacco Control. For countries that already ban internet tobacco advertising, enforcement efforts should be strengthened. Tobacco companies’ use of URLs on packs may also be compelling for plain packaging advocacy, where all branding is removed from the pack and large graphic health warning labels are the only communication on the tobacco packaging. Future research should consider including tobacco websites in marketing surveillance.
Innovation Patterns and Their Effects on Firm-Level Productivity in South Asia
Authors: Cirera Xavier , Cusolito Ana P.
Published: June 2019

This paper describes and benchmarks innovation activities for a sample of countries in the South Asia region, as well as the impact of these activities on firm-level productivity. The evidence gathered suggests that countries in the South Asia region can be divided into two groups, both in terms of the magnitude and composition of the innovation activities: leaders (Bangladesh and India) and laggards (Nepal and Pakistan). Leaders present higher rates of innovation activities than laggards and focus more on process innovation than in product innovation. Also, differences across-firms within all countries tend to present similar patterns when considering both leaders and laggards; with the acquisition of knowledge capital (e.g., R&D, investments in equipment, training) highly concentrated in few firms, and mature, exporter, and foreign-owned firms as the most innovative of the region. The evidence also suggests a positive impact of innovation on productivity, primarily via incremental innovation, especially in India.
Postweaning Exposure to High Concentrates versus Forages Alters Marbling Deposition and Lipid Metabolism in Steers
Authors: Koch Brandon M. , Pavan Enrique , Long Nathan M. , Andrae John G. , Duckett Susan K.
Published: June 2019

Angus-cross steers (n = 20; 261 ± 21.5 kg BW) were used to examine how early exposure to high concentrates or high quality forages altered marbling deposition and lipid metabolism. Steers were randomly assigned to high concentrate diet (CONC) or high quality forages (FOR) at 30-d postweaning, fed for 127 d, and slaughtered. Data were analyzed using a mixed model that included fixed effect(s) of dietary treatment (CONC vs. FOR), time (for plasma levels, ultrasound measures, and postmortem aging time) and two-way interaction (when appropriate). Steers fed CONC had greater (P < 0.01) ADG and heavier (P < 0.001) body weight at 127 d. Ultrasound measures over time showed greater (P < 0.001) intramuscular fat deposition at d 98 and 126 for CONC than FOR steers. Steers fed CONC had elevated (P < 0.05) plasma glucose and insulin concentrations from d 57 to 127 compared to FOR. Early exposure to CONC increased (P < 0.01) dressing percent, HCW, LM area, 12th rib fat thickness, and marbling scores compared to FOR. Total lipid content of the LM was greater (P < 0.01) for CONC than FOR; however, moisture, protein, and ash content was lower (P < 0.01) for CONC than FOR. Concentrate fed steers had greater (P < 0.01) MUFA content and lower (P < 0.01) polyunsaturated fatty acids PUFA n-3 content than FOR. The n-6:n-3 ratio was greater (P < 0.01) for CONC due to decreased (P < 0.01) in n-3 fatty acid content with CONC. Gene expression was up-regulated (P < 0.05) for key lipogenic genes and downregulated for glucose transporter 4 in steers fed CONC vs. FOR. Early exposure to CONC diets for 127 d at 30 d postweaning stimulated marbling deposition and resulted in these carcasses grading 80% Choice when slaughtered at 13 mo of age and 248 kg HCW.
Evaluación de un sistema de recomendación híbrido de trabajos de titulación
Authors: Vences Nava Rodrigo , Menéndez Domínguez Víctor Hugo , Medina Peralta Salvador
Published: June 2019

La tarea de evaluar un sistema de recomendación no se limita a verificar que el algoritmo de recomendación funcione correctamente, sino que debe contemplar además la validación de que cumple con los objetivos para los cuales fue diseñado. Esto último varía dependiendo del sistema de recomendación, ya que para los sistemas comerciales significaría aumentar sus ventas, pero para uno del sector educativo podría ser mejorar el aprovechamiento de los estudiantes. Este artículo se enfoca en la evaluación de un sistema de recomendación, que presenta al usuario, trabajos de titulación similares a los que ha consultado anteriormente con base en diferentes fuentes de información asociadas a los mismos (metadatos) y su interacción con el sistema y la comunidad de usuarios. Se realizaron tres tipos de estudios para evaluar la precisión del motor de búsqueda y recuperación, el uso del filtrado de palabras clave en la recomendación colaborativa y por último la utilidad, facilidad y percepción del sistema por medio de los cuestionarios Escala de Usabilidad del Sistema y el Modelo de Aceptación Tecnológica. Los análisis estadísticos comprueban la efectividad y aceptación del Sistema de Recomendación por parte de los tres grupos de usuarios participantes en los experimentos (profesores, tesistas y alumnos en general).
Vibration analysis system applied to fault detection in wind turbines
Authors: Sánchez Soto José Rafael , Téllez Anguiano Adriana del Carmen , Escobar Jimenez Ricardo Fabricio , Chávez Campos Gerardo Marx , Gutiérrez Gnecchi José Antonio
Published: June 2019

Wind power is one of the most important renewable energy sources due to its vast availability. Wind turbines are the equipment required to take advantage of the wind energy potential; therefore, a low reliability of these turbines limits the maximum power obtained from the wind. Different techniques and methodologies have been developed to monitor and detect failures in wind turbines in order to prevent undesirable conditions due to different operating conditions. This work presents a system designed to detect failures in wind turbines caused by mechanical vibrations, this system allows to diagnose, online, different structural failures in the wind turbine through a statistical frequency analysis based on LabView and Matlab. The designed system is validated by online measurements, obtained by 3-axis vibrations sensors in a domestic wind turbine. A graphical interface is developed in LabView in order to facilitate the online location and isolation of the detected failures.
Circuito CMOS para el control de temperatura de sensores de gas MOX
Authors: Álvarez Simón Luis Carlos , Gómez Ramirez Emmanuel
Published: June 2019

En los últimos años, la contaminación del aire y la detección de gases nocivos se han convertido en una vertiente en la investigación. Por ello, hoy en día se han desarrollado diversos sensores capaces de detectar diferentes gases, por ejemplo, los sensores químico-resistivos y los de tipo metal-óxido-semiconductor (sensores MOX), los cuales se destacan entre otras tecnologías. Los sensores de gas MOX permiten detectar múltiples gases con una alta sensibilidad y además son compatibles con tecnologías de integración CMOS. Los sensores MOX combinan un elemento de sensado de gas y un elemento de calentamiento para la selectividad de gases. Actualmente, la modulación de la temperatura de operación es una de las técnicas más usadas para mejorar la selectividad y estabilidad de los sensores de gas MOX. En este trabajo se propone un circuito de control on/off para la modulación de la temperatura de operación de sensores MOX utilizando la resistencia del calentador para monitorear su temperatura. Este circuito permite aplicar diferentes técnicas de modulación de temperatura tales como la técnica de modulación por pulsos, la técnica de modulación por ondas periódicas y el control a diferentes niveles de la temperatura de operación para la generación de matrices virtuales de sensores mediante un solo sensor. El circuito se diseñó en una tecnología CMOS de 180nm y se simuló usando un modelo simple del sensor comercial AS-MLC de AppliedSensor. El circuito propuesto permite alcanzar exactitudes de 0.2 Ω en el valor de la resistencia del calentador, el cual, corresponde aproximadamente a un error de 1 °C en la temperatura de operación del sensor.
Estrategias de comunicación de las editoriales literarias de España
Authors: Gómez López Almudena , Hellín Ortuño Pedro Antonio
Published: June 2019

Este estudio trata el tema del marketing editorial y las estrategias de comunicación que despliegan las editoriales literarias en España, y tiene como objetivos fundamentales servir de base a otros estudios referentes a la misma área, conocer las estrategias de comunicación de algunas editoriales literarias de España y establecer una delimitación conceptual del marketing editorial. La metodología empleada consta de una investigación documental en bases de datos, páginas web y bibliotecas, que ha servido para recoger, seleccionar y analizar la información más importante sobre el tema tratado, así como una investigación de campo mediante entrevistas a los responsables del área de mercadotecnia de las editoriales Alba, Anagrama y Balduque para conocer el uso que hacen de las estrategias de comunicación. Los resultados obtenidos evidencian un uso progresivo de la comunicación digital como medio de información, publicidad y fidelización de lectores, con una mejor adaptación a las redes sociales de una editorial pequeña, pero con mayor uso de sus herramientas de publicidad de una editorial grande, siendo similares el uso de las estrategias de comunicación convencionales. Las conclusiones ponen de manifiesto la necesidad de conceptualizar el marketing editorial, debido a la confusión de su utilización, las estrategias de comunicación poco definidas y un uso analógico de las nuevas tecnologías.
Proporción y distribución de erratas en publicaciones científicas
Authors: Pichardo-Corpus Juan Antonio , Contreras-Nuño Guillermo , De la Peña José Antonio
Published: June 2019

Los errores son parte del proceso en la investigación científica. Las correcciones a estos errores se hacen normalmente en artículos llamados, entre otros nombres, errata o erratum. La investigación sobre estas erratas ha sido, en áreas de investigación y revistas, muy específica. Así, en este artículo estudiamos la tasa de erratas en las veintisiete áreas de investigación definidas en la base de datos Scopus. Nos enfocamos en el periodo 2003-2017 para analizar la distribución de las veintisiete áreas en cuartiles, de acuerdo con el porcentaje de erratas. En paralelo, analizamos la tendencia de esos porcentajes por cada área durante el periodo señalado. Encontramos que esas equivocaciones son útiles como un indicador de diferencias notables entre áreas del conocimiento. Con información de la Web of Science, nos enfocamos en cuatro áreas del conocimiento, particularmente en la proporción de erratas por revista. Encontramos que la mayoría de éstas no tienen erratas publicadas, que en general la correlación entre el factor de impacto y el porcentajede aquéllas no es significativa y que la distribución de esos por revista se ajusta bien a una distribución log-normal.
La circulación de libros en la Biblioteca de la Universidad de León (España)
Authors: Rodriguez-Bravo Blanca , Rodriguez-Sedano Francisco Jesus
Published: June 2019

El objetivo general de esta investigación se dirige a conocer la circulación de los materiales tradicionales en las bibliotecas de la ULe, para observar la evolución del préstamo en el momento de auge de la colección electrónica, indagar sobre los principales usuarios de la colección y averiguar qué tipos documentales son los más prestados. En especial interesa saber el posicionamiento del libro como fuente de información en la comunidad universitaria. De los resultados obtenidos se desprendeque el volumen de la colección se adecua al número de usuario, que el movimiento de la colección no es muy elevado, aunque existen notables diferencias entre centros, y que el préstamo, al igual que la colección, está dominado por los libros impresos.
Mediação: categoria lógica, ontológica, epistemológica e metodológica
Authors: Martins Ana Amélia Lage
Published: June 2019

La categoría mediación se consolidó en el marco teórico de la Ciencia de la Información como un importante operador conceptual. Con significados distintos, su empleo es hecho por distintas corrientes teóricas y epistemológicas, como modo de pensar las diversas dinámicas que involucran la producción, la organización, el flujo, la comunicación, la apropiación, la circulación, la transferencia, los dispositivos, los registros, los usos, los usuarios y los regímenes de información en diferentes contextos. Se sabe que este constructo polisémico, que ha migrado a diversos campos del conocimiento, está presente en la Filosofía, por lo menos, desde la Antigüedad Clásica, habiendo sido desarrollado por la dialéctica moderna, que lo tiene como importante categoría de su sistema. El articulo parte de la génesis histórica del concepto de mediación y explora algunos de sus significados dialécticos, demarcando que la mediación es categoría fundamentalmente lógica, ontológica, epistemológica y metodológica.
Moisture potental theory application for modelling of enclosing structure unsteady-state moisture regime
Authors: Gagarin About the authors: Vladimir G. , Zubarev Kirill P.
Published: June 2019

Introduction. Known calculation methods for enclosing structure unsteady-state moisture regime proposed by K.F. Fokin, are examined. The first one describes moisture transfer in a sorption zone, and another allows calculation in oversorption zone also. “Thermodynamic moisture potential” of enclosing structure materials introduced by V.N. Bogoslovsky is described. Moisture potential F developed by V.G. Gagarin and V.V. Kozlov is shown. The moisture potential F allows describing water vapor and liquid moisture movement in material in a consistent way. The scientific novelty of the study is the development of calculation method based on moisture potential F. Practical relevance of the study is the possibility to obtain performance humidity values of enclosing structure materials by means of calculations for engineering practice.
Materials and methods. A moisture transfer equation is derived on the basis of process physical interpretation, A mathematical model, consisting of heat conductivity equation, derived moisture transfer equation, spatial-time domain, boundary and initial conditions, is formulated. Moisture potential in single-layer and multilayer enclosing structures is determined using finite difference method.
Results. Calculations for four types of enclosing structures are made on the basis of the proposed mathematical model: single-layer aerated concrete wall; a wall made of aerated concrete masonry base and clay brick cladding; a wall made of aerated concrete masonry base and mineral wool insulation with thin plaster layer; a wall made of aerated concrete masonry base and expanded polystyrene insulation with thin plaster layer.
Conclusions. Calculated performance humidity values of enclosing structure materials were lower than values stated in regulatory documents. The presented results allow to define building heat loss definition and heating system design more accurately. Specification data on maximum wetting plane position obtained earlier were proved within the framework of the developed theory: in enclosing structures with aerated concrete base and mineral wool insulation maximum moisture content is located at the joint of plaster and insulation layers; in enclosing structures with aerated concrete base and expanded polystyrene insulation maximum moisture content is located in the insulation layer.
Acknowledgements. Authors are deeply indebted to V.V. Kozlov, PhD in Technical Sciences, and V.K. Akhmetov, Doctor of Engineering Science, Professor, for discussion and useful comment in the course of study.
Influence of beam butt face nonparallelism on free damped vibration spectrum of the beam
Authors: Popov Alexander L. , Sadovskiy Sergey A.
Published: June 2019

Introduction. The free vibration method is widely applied to detecting internal defects in rod and lamellar structural elements. In this work, it is used to diagnose a rod sample defect consisting in nonparallelism of the rod ends. The possibility of identifying a defect in the form of a bevel of one of the rod butts by the frequency spectrum of free damped longitudinal and transverse vibration after impact actions to the rod side or butt face is considered.

Materials and methods. An experimental facility and a method of contact-free recording of the frequency spectrum of the rod natural vibration by its acoustic radiation spectrum are presented. Signs of a defect in the form of a split frequency of the rod transverse vibration are detected. At the same time, the maximum amplitudes of the split frequencies correspond to higher or lower frequencies depending on the face to which the impact is applied. This allows not only determining the presence of a defect in the form of the bevelled butt face, but also establishing its orientation relative to the side rod faces.

Results. An approximate theoretical model is suggested. It explains the effect of frequency splitting in the presence of nonparallelism of the rod butts. For this, the frequency spectra of transverse vibration of two rods with lengths equal to the lengths of the smaller and the larger faces of the original rod with the bevel edge are considered. Experiments show that the differences in the natural frequencies of the bending vibration of these rods, which correspond to the same eigenmodes, are consistent with the differences in the split frequencies of the free damped transverse vibrations of the bevelled-face rod. At this, relationship between the split frequency amplitudes allows determining not only the presence of bevelled face, but also its location.

Conclusions. The application and development of the method through the analysis of the natural vibration spectrum can lead to creation of remote quality control equipment for rod structural elements.
Research of sewage intake of small settlements during the period of rain and snowmelt
Authors: Ivanenkо Irina I. , Senicheva Kseniya S.
Published: June 2019

Introduction. The coefficients of uneven receipt of waste for settlements with a population of 1000 people used in the design practice, as determined in the process of analyzing the literature data, differ greatly in values, which can lead to significant errors in the calculations in the design of head wastewater treatment plants. At three sites located in the Leningrad Region, wastewater discharge measurements were carried out. Earlier, irregularity coefficients for wastewater in the dry season were determined and a mathematical relationship was proposed to describe fluctuations in the daily irregularity coefficient of wastewater during the year. The authors continued to work towards determining the irregularity coefficients for settlements with a population of 1000 people. Information on irregularity coefficients in the period of rainfall and snowmelt for two objects is given. Materials and methods. To measure the daily flow of municipal wastewater in the village of Bolshaya Dvor and the village of Tsvylevo, Leningrad Region, flow meters ERRAYM ERSV-540F V flow meters were used. A sample of the values corresponding to rainfall and snowmelt was compiled using the available weather archive from 15.12.2016 to 14.12.2017, determined the corresponding coefficients of daily irregularity of wastewater costs. A comparison of data of various objects. Results. The dependence of the daily irregularity coefficient of the snow melting period on the average air temperature is proposed. Results are given on the effect of precipitation and the duration of the preceding drought period on the daily irregularity coefficient during rainfall. Conclusions. The previously developed method for determining the estimated wastewater costs for small objects with a population of 1000 people has been added.
Desarrollo Sostenible para resguardar la seguridad humana, a partir de los resultados del Índice de Progreso Social y su vinculación con la Economía Social Solidaria: Caso Costa Rica
Authors: Espinach-Rueda Monserrat
Published: June 2019

El desarrollo sostenible busca resguardar la seguridad humana a partir de crear progreso social en las comunidades al implementar una Economía Social Solidaria (ESS). Para determinar el avance o rezago de una comunidad o país en seguridad humana, se requiere indicadores que midan el progreso social y, bajo esa filosofía, nace el Índice de Progreso Social (IPS).A nivel mundial, Costa Rica ha crecido en el IPS comparado con otras naciones, pero al hacer un análisis interno de las mediciones que se dan en 81 cantones del país en el 2017, los resultados visualizan una brecha social dentro de distintas comunidades del país que no permite crecer en condiciones de equidad en seguridad humana para todo el país.
Using Public Company Filings to Plan the Audit and Perform Risk Assessment Procedures
Authors: Cunningham Lauren M. , Kremin Joleen , Warren Amanda D.
Published: June 2019

This project gives student groups the opportunity to research and analyze publicly available information in the context of audit planning and risk assessment for a publicly traded company. Students simulate an audit team environment and deliver a summary audit-planning memo, risk assessment analytical procedures, and a video presentation in which each audit team presents its findings to the “audit partner.” This project accomplishes several important learning objectives, including (1) familiarizing students with the SEC's EDGAR database and other public sources of company data; (2) fostering students' research and critical-thinking skills; and (3) improving students' understanding of the risk assessment process. This project uses free, publicly available information to achieve these objectives, and the project can be easily modified for subsequent classes by requiring students to utilize the most recent year's filings when completing the project. The project is appropriate for undergraduate or graduate auditing students.
Key Features of Insulin Delivery Devices for Type 2 Diabetes: Type 2.0 Booth Survey
Authors: Sze David , Oliveria Teresa
Published: June 2019

This article reports on a survey conducted at four diabetes-related annual conferences in 2017 and 2018 to obtain input from the medical community regarding the most important features of insulin delivery devices to address the unmet needs of people with type 2 diabetes who require basal/bolus insulin therapy. The overall patterns of responses compiled from 742 participating health care providers, each voting for three of eight proposed features of insulin delivery devices, were mostly similar numerically at each conference. The features garnering the top three percentages of votes (n = 2,226) averaged for all four conferences were tube-free patch (14.7%), reduced number of insulin injections (14.7%), and dose capture report (14.2%). Four other features received almost as many votes: flexible dosing (14.0%), patient lifestyle app (13.3%), wireless controller (12.7%), and interconnected glucose monitoring (12.6%). This survey provided valuable information that can aid the development of future insulin delivery devices.
An Integrated Approach for Friction and Wear Simulation of Tire Tread Rubber. Part I: Friction Test, Characterization, and Modeling
Authors: Li Zhao , Li Ziran , Wang Yang
Published: June 2019

To simulate tire tread friction and wear, a variety of factors have to be taken into account. Among them, the local nonlinear constitutive equation for friction and wear in the contact interface and the related solving strategies, including the wear increment optimization and worn mesh update, are very critical to the predicting methodology. This two-part contribution addresses an integrated approach for friction and wear simulation of tire tread rubber. In Part I, a modified friction test scheme of rubber wheels with the Laboratory Abrasion and Skid Tester (LAT 100) is proposed, along with numerical verification, which greatly improved the distribution uniformities of the contact pressure and sliding velocity. In order to investigate the friction characteristics of tire tread rubber, various contact conditions were conducted, and then a unified friction model was put forward to describe the nonlinear relationship of rubber friction with contact pressure and sliding velocity. Based on the established frictional contact model, the locked traction and cornering rolling were simulated, and the calculated friction forces and lateral forces agree with the experimental results on the whole.
The Contribution of Student Activity and Learning Facilities to Learning Independency and it’s Impact on Mathematics Learning Outcomes in Junior High School
Authors: Firdausy Ainun Rahma , Setyaningsih Nining , Ishabu La Suha , Waluyo Mohamad
Published: June 2019

This study aims to: (1) examine the contribution of student activity and learning facilities to mathematical learning outcomes indirectly through learning independence, (2) examine the contribution of student activity and learning facilities to learning independence, (3) test the contribution of student learning independence to results learn math. This type of research is quantitative with the research subjects being all VII grade students of the Muhammadiyah Middle School Surakarta Special Program in 2018/2019. Data collection is done by questionnaire and documentation. The data analysis technique used is path analysis which has previously been carried out in five tests of data analysis prerequisites, namely: normality test with liliefors, linearity test, multicollinearity test, heteroscedasticity test and autocorrelation test. The results of the study with a significance level of 0.05, namely: (1) there is a contribution of student activity and learning facilities to learning outcomes indirectly through learning independence by 23.9%, (2) there is a contribution of student activity and learning facilities to learning independence by 64%, (3) there is a contribution of learning independence to mathematics learning outcomes of 15.68%.
Ujaran Kebencian di Ruang Publik: Analisis Pragmatik pada Data Pusat Studi Agama dan Perdamaian (PSAP) Solo Raya
Authors: Kurniasih Dwi
Published: June 2019

This study aims to explain the forms of speech hate in the public space using pragmatic theory, especially acts of perlokusi speech. In addition, this research also explains the actualization of the Solo Raya Center for Religion and Peace Studies in minimizing the utterances of hatred in the public sphere. The method used in this study is descriptive qualitative. Data is obtained from hate speech monitored by PSAP for the period January-December 2017 until January-July 2018. Data is a word or sentence in the form of banners and the like with utterances of hate spread in public spaces. The results of the study show that all forms of speech if associated with pragmatic science, are all included in the category of perlocution speech acts, because they all lead to the power of one's influence or cause bad stereotypes. Based on the class of hate speech forms, the data presented is classified into several types of hate speech, namely (1) insult; (2) provocation; (3) oppression; (4) speech of crime. In addition, a forum for communication and discussion is needed to erode speeches of hatred. For example, the formation of the Solo Raya PSAP institution as a form of minimizing the utterance of hate in the public space.
Distribution of Ploidy Level on Adiantumdiaphanum Blume at Various Altitudes in Probolinggo
Authors: Amelia Ade Rezi , Fauzi Ahmad
Published: June 2019

Ferns are indicated could become polyploid organism due to altitude effect. In this research, the distribution of ploidy level on AdiantumdiaphanumBlume based on difference altitude was studied. This study was a survey research conducted in Probolinggo Regency which aims studying the effect of altitude on ploidy level in A. diaphanumBlume. Leces (50 masl), Lumbang (460 masl), and Sukapura (820 masl) were the tree research sampling areas that represent low, medium, and highland location, respectively. The determination of ploidy level was conducted by counting the chromosome number of cells root tips. The results showed that all ferns found in the medium and lowland were diploid organisms, whereas all ferns found in the highlands were triploid organism.