bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and Analysis of an Open Differential
Authors: Chaudhari Neha
Published: July 2021

A transmission or gearbox provides speed and torque conversions from a rotating power source to another device using gear ratios. The most common use is in motor vehicles, where the transmission adapts the output of the internal combustion engine to the drive wheels. Such engines need to operate at a relatively high rotational speed, which is inappropriate for starting, stopping, and slower travel. The transmission reduces the higher engine speed to the slower wheel speed, increasing torque in the process. We have designed a differential gearbox and tried to create the frictional contact between two mating gears. And we have performed the structural analysis on gear box by providing the torque to the assembly of crown gear and pinion gear, assembly of inner gears- spider gears and side gears and crown gear with the cage to attach spider gears. We have selected two kinds of alloy steel and have compared the factor of safety and structural analysis of the both.
Behavioral Host-Based Intrusion Detection and Prevention System for Android
Authors: Darange Yashavant
Published: July 2021

Intrusion Detection System (IDS) is vital to protect smartphones from about to happen security breach and make sure user privacy. Android is the most popular mobile Operating System (OS), holding many markets share. Android malware detection has received important concentration, existing solutions typically rely on performing resource intensive analysis on a server, assuming an uninterrupted link between the device and the server. In this paper, we propose a behavior Host-based IDS (HIDS) by using permissions incorporating arithmetical and ML algorithms. The benefit of our proposed IDS is two folds. First, it is completely independent and runs on the smartphone device, without need any link to a server. Second, it requires only training dataset consisting of some of examples from both benign and malicious datasets for tuning. though, in put into practice, collecting malicious examples is exciting since its important infecting the device and collecting many of samples in order to characterize the malware’s behavior and the labelling has to be done. The evaluation outcome show that the proposed IDS gives a very hopeful accuracy.
Analysis of Seismic Behavior of Multistoried R.C.C Building Resting on Sloping Strata under Seismic Load
Authors: D Deeshma
Published: July 2021

Construction of RC buildings in preferred locations in the north & eastern hilly regions have increased during the last few decades due to urbanization, population increase, and high influx of tourists. The buildings situated in hilly areas are much more prone to seismic environment in comparison to the buildings that are located in flat regions. Structures on slopes differ from other buildings since they are irregular both vertically and horizontally and therefore susceptible to severe damage when subjected to seismic action. The columns of ground storey have varying height due to sloping ground. This paper presents the comparative analysis of various configurations of 15 storied building with to be found on varying slope with different plan and different structural arrangements situated on seismic zone IV. This study compares various reinforced concrete models framed and analysed their response against dynamic loading to identify and struggle the worst possible scenario. The study is carried out for a combination of three different slopes and different building configuration by response spectrum analysis method and various parameters are compared against various constraints.
Superheating Limit of Hydrocarbons Based on a Generalized Dieterici Equation of State
Authors:   Department of Physics, Arignar Anna Government Arts College, Namakkal, Tamilnadu, India, R Kamala , R Balasubramanian
Published: July 2021

A new three-parameter Dieterici type equation of state is employed for studying the high-temperature thermodynamic characteristics of hydrocarbons. This generalized equation of state differs from the known Dieterici equation of state by a modified attractive term. That is, a new thermodynamic similarity parameter is introduced in the attractive term of the Dieterici equation of state. The parameters of the equation of state are determined through the experimental values on the critical-point parameters of hydrocarbons. The equation of state is presented in the reduced form, from which follows the single-parameter law of corresponding states. The proposed equation of state gives the value of maximum attainable superheat for hydrocarbons of about 0.887 to 0.894 times the critical temperature. The new three- parameter generalized Dieterici equation of state offers an acceptable compliance with experimental results of maximum attainable superheat of hydrocarbons.
Elastic Cable-Connected Satellites System Under Several Influences of General Nature: Equations of Motion in Elliptical Orbit
Authors:   P.G. Department of Physics, L.S. College, B.R.A. Bihar University, Muzaffarpur, India, Kumar Sangam , Ghosh Joydip
Published: July 2021

In the present work, we have applied the analytical approach to obtain the equations of motion of a system of two cable connected artificial satellites under the effect of various perturbative forces of general nature. These perturbative forces are the earth’s shadow, solar radiation pressure, earth’s oblateness and the earth’s magnetic field. Our aim is to investigate the motion of the centre of mass of the two artificial cable connected satellite system in Keplerian elliptical orbit. We establish the equations of motion for the centre of mass of the system and also for the relative motion of the system. We obtain equations of motion in the rotating frame of reference as well as in Nechvile’s co-ordinate system. The cable under consideration is light, flexible, non-conducting and elastic in nature.
Determining the Primary Productivity of the Macrophytes in Tamdil Lake, Mizoram, Northeast India
Authors:   Department of Environmental Science, Pachhunga University College Mizoram University, Aizawl, Mizoram, India, Singh K. Khelchandra , Zirthangmawia J.C.
Published: July 2021

The present investigation has been carried out for determining the net primary productivity (NPP) of the macrophytes found in Tamdil Lake, Mizoram. Both monthly and daily NPP of the macrophytes were evaluated for a period of two years. The findings clearly indicate that Alternanthera philoxeroides has the highest monthly NPP values (range: 2.18 to 24.42 gm–2 month–1; mean value 18.54 ± 2.12 gm–2 month–1), followed by Echinochloa stagnina (range: 0.91 to 10.94 gm–2 month–1; mean value 7.69 ± 1.97 gm–2 month–1), Eichhornia crassipes (range: 0.63 to 15.93 gm–2 month–1; mean value 12.74 ± 3.14 gm–2 month–1) and Kyllinga tenuifolia (range: 0.20 to 8.61 gm–2 month–1; mean value 7.02 ± 1.95 gm–2 month–1). This was followed progressively by Nymphaea pygmaea helvola with values of 1.08 to 17.11 gm–2 month–1. The monthly NPP of ‘other species’ ranged from 0.38 to 8.01 gm–2 month–1 (mean value 6.06 ± 2.08 gm–2 month–1). The monthly NPP of all the species (combined) reported a range of 0.89 to 119.82 gm–2 month–1 (mean value of 63.50 ± 2.99 gm–2 month–1). For estimation of daily NPP of the macrophytes, Alternanthera philoxeroides reported the peak daily NPP (range: 0.15 to 1.26 gm–2 day–1 with mean value of 0.87 ± 1.39 gm–2 day–1), followed closely by Eichhornia crassipes (range: 0.09 to 0.83 gm–2 day–1; mean value of 0.53 ± 1.42 gm–2 day–1, Nymphaea pygmaea helvola (range: 0.09 to 0.81 gm–2 day–1, mean value of 0.49 ± 2.13 gm–2 day–1), Echinochlo astagnina (range: 0.07 to 0.59 gm–2 day–1 with a mean value of 0.27 ± 0.98 gm–2 day–1. It has been found that the daily NPP of ‘other species’ ranged from 0.03 to 0.47 gm–2 day–1 with a mean value of 0.23 ± 0.92 gm–2 day–1.The daily NPP of all species (combined) ranged from 0.05 to 3.46 gm–2 day–1 with a mean value of 2.47 ± 2.28 gm–2 day–1. The macrophyte NPP varied significantly during the study period. Moderately higher daily NPP values of macrophytes indicates that the lake is approaching towards eutrophic status.
Recolección de Residuos Tecnológicos aplicando Metaheurísticas
Authors: Pérez Diana , Pandolfi Daniel , Villagra Andrea
Published: July 2021

La creciente demanda en el uso las tecnologías de la información y comunicación (TIC) han revolucionado nuestra vida cotidiana, sin embargo, han contribuido a aumentar las preocupaciones ambientales y sociales. La aceleración de factores como el agotamiento y escasez de recursos, daños ambientales, uso de agua y energía y un incremento insostenible de desechos tecnológicos principalmente en zonas urbanas, se ha convertido en una preocupación para la industria y el gobierno. La recuperación de residuos tecnológicos requiere de estrategias inteligentes de recolección que minimicen los costos asociados, maximicen el reúso de materias primas y la reparabilidad de los bienes para la prolongación de su vida útil. Uno de los factores que inciden fuertemente, es el costo de recorrido para la recolección.
 
Este trabajo consiste en generar rutas recolección dado una cantidad de clientes por atender, un conjunto de vehículos de recolección, permitiendo minimizar ciertos factores que ayuden a la empresa a obtener beneficios. Los objetivos pueden ser: minimizar el tiempo de reparto, maximizar el ahorro de combustible en los vehículos, minimizar la cantidad de vehículos de reparto, todo lo cual llevaría a obtener menores costos y por lo tanto obtener beneficios y una mejor calidad de servicio e imagen. Particularmente, el propósito de este trabajo es mostrar como la aplicación de un algoritmo basado en inteligencia colectiva (metaheurística) mejora la planificación de recolección de residuos tecnológicos para un caso de estudio en la localidad de Comodoro Rivadavia sobre con diferentes escenarios e instancias de recolección con 75, 105, 150 y 200 contenedores de residuos y vehículos con diferentes capacidades. Se realiza además un análisis de la reducción de gases emitidos.
Funciones de evaluación de calidad para un tránsito inteligente
Authors: Carballo Laura , Villagra Andrea , Pandolfi Daniel
Published: July 2021

Los problemas de tránsito aumentan constantemente y las ciudades del futuro solo pueden ser verdaderamente inteligentes si habilitan la Movilidad Inteligente (en inglés, Smart Mobility). Aplicaciones de movilidad inteligente como el control de semáforos, el estacionamiento inteligente y la gestión del tránsito, entre otras están comenzando a ser utilizadas en todo el mundo, trayendo beneficios a las ciudades, mejor calidad de vida, costos reducidos, uso de energía más eficiente y disminución de las emisiones vehiculares. Mejorar la movilidad representa un gran reto. Actualmente, una ciudad con tráfico congestionado y muchos embotellamientos conduce a más contaminación. Por lo tanto, con la gestión inteligente del tránsito, el consumo de combustible y las emisiones contaminantes pueden ser reducidas. A diferencia de técnicas tales como semáforos inteligentes que requieren nueva infraestructura, ubicación de sensores y modificaciones en obras civiles ya construidas, el uso de técnicas de inteligencia artificial en la optimización de los ciclos de semáforos se presenta como una herramienta viable, rápida, eficiente y de bajo costo. En este trabajo se proponen diferentes funciones de evaluación de calidad con un algoritmo genético celular (cGA) aplicadas a dos grandes escenarios cercanos a la realidad en áreas urbanas ubicadas en las ciudades de Málaga (España) y París (Francia), simuladas por el popular micro-simulador SUMO (Simulator Urban MObility). La comparación de las diferentes funciones revela la bondad de algunas funciones logrando a una reducción significativa en términos de las tasas de emisión y del consumo total de combustible, además de una reducción en los tiempos de variables de tránsito analizadas.
Routed quantum circuits
Authors: Vanrietvelde Augustin , Kristjánsson Hlér , Barrett Jonathan
Published: July 2021

We argue that the quantum-theoretical structures studied in several recent lines of research cannot be adequately described within the standard framework of quantum circuits. This is in particular the case whenever the combination of subsystems is described by a nontrivial blend of direct sums and tensor products of Hilbert spaces. We therefore propose an extension to the framework of quantum circuits, given by routed linear maps and routed quantum circuits. We prove that this new framework allows for a consistent and intuitive diagrammatic representation in terms of circuit diagrams, applicable to both pure and mixed quantum theory, and exemplify its use in several situations, including the superposition of quantum channels and the causal decompositions of unitaries. We show that our framework encompasses the `extended circuit diagrams' of Lorenz and Barrett [arXiv:2001.07774 (2020)], which we derive as a special case, endowing them with a sound semantics.
DIEZ REFLEXIONES SOBRE MEDIACIÓN PEDAGÓGICA
Authors: Godoy Gálvez Marcelo Humberto , Cortes Veliz Johanna , Espinoza Vásquez Rodrigo , Rengifo Oyarce Mónica
Published: July 2021

El presente texto es una reflexión que surge de la revisión bibliográfica y de experiencias educativas para la comprensión del fenómeno de la mediación pedagógica. Acercamos nuestros pensamientos hacia la idea de mediación como un entramado de experiencias educativas, donde se produce la creación de relaciones posibles entre quienes viven la situación de aprendizaje.Esta reflexión comprende la mediación a partir de la ética y fundadas en el amor y la aceptación. Asimismo, concebimos el aprendizaje como una transformación profunda del ser, pues aprender es sinónimo de vida.
BULAK SUMUR FRAMEWORK: OPTIMALISASI KUALITAS AUDIT SYARIAH DI INDONESIA
Authors: Sembilan Bunga Thuba , Haryono Slamet
Published: July 2021

The many problems that occur in sharia audits in Indonesia starting from the problem of human resources, regulations and audit processes make it necessary to take action in order to improve the quality of institutions and finance in Indonesia. Islamic auditing is very important to be able to evaluate the mistakes that occur in Islamic financial institutions. The problems that arise in the Islamic audit try to be solved by researchers by using the Bulak Sumur well through several strategic offers. In conducting this research, the approach used is a qualitative approach with a method of literature study. The research results obtained in overcoming the problem of Islamic auditing in Indonesia, namely by increasing the number of institutions and improving the materials in auditor training, forming a framework and regulation, forming cooperation between academics and practitioners and adopting related rules, materials, etc. from suitable foreign countries applied in Indonesia.Keywords: Bulak Sumur Framework, Sharia Audit.
FMAQ-S: Development of a Short Form of the Family Medicine Attitudes Questionnaire
Authors: Kang Hana , Prunuske Jacob , Wendling Andrea L. , Edwards-Johnson Jennifer , Phillips Julie P.
Published: July 2021

Introduction: Identifying and training students who choose family medicine careers is essential to meeting primary care workforce needs in the United States. Medical students’ positive attitudes toward family medicine are associated with students’ choice of family medicine as a specialty. This study sought to refine a previously tested questionnaire assessing US medical students’ attitudes toward family medicine by shortening the questionnaire to make it more useful in educational practice and research settings.
Methods: We refined our existing 14-item questionnaire by item analysis and validation. We conducted item analysis using a graded response model approach after identifying the unidimensionality of the original scale. We selected items based on their item discrimination parameters and item information levels, and calculated the correlation between specialty choice and family medicine attitudes score to evaluate criterion validity.
Results: Exploratory factor analyses indicated the questionnaire is unidimensional. Among the original 14 items, 10 items had high item discrimination parameters and low standard error of measurement. These 10 items contribute the most to distinguishing individuals’ differences in family medicine attitudes and were selected for inclusion in the short-form questionnaire (FMAQ-S). The point-biserial correlation between the short-form scale and students’ choice of family medicine was 0.378, which provides supporting evidence for criterion validity.
Conclusion: The FMAQ-S is a concise and validated measure for assessing medical student attitudes toward family medicine. This abbreviated questionnaire can be used by medical educators to identify students for specific programming or interventions intended to support family medicine specialty choice.
Comprensión de la derivada apoyada en la ingeniería didáctica como método de investigación
Authors: Saraza-Sosa Dilan Fabián , Prada-Núñez Raúl , Vera-Gutiérrez Charen Lisset
Published: July 2021

El cálculo diferencial ha tenido diversas dificultades en el entendimiento de sus diversos conceptos, en especial en el tema de la derivada, donde se ha registrado que los estudiantes desarrollan una asimilación de tipo algorítmico y mecánico en la aplicación de sus reglas de derivación, despreciando la construcción gráfica y visual, la cual es importante para un desarrollo óptimo del saber mencionado.  Por lo anterior se implementó la metodología de ingeniería didáctica en el tema de la derivada, con el fin de sentar bases de tipo epistémico y documental para conocer cuáles son las situaciones que generalmente se presenta entorno a la enseñanza de este saber, en base a lo anterior se aplicó una prueba de conocimiento para identificar el grado de comprensión adquirido por los docentes en formación de programa académico de Licenciatura en Matemática de la Universidad Francisco de Paula Santander, a fin de establecer lineamiento para la estructuración de unas secuencias didácticas que fomento un aprendizaje óptimo de la derivada.
La maleta viajera de Euclides, como estrategia didáctica para fortalecer el pensamiento espacial y los sistemas geométricos
Authors: Marín-Arguello Leidy Katerine
Published: July 2021

El desarrollo del pensamiento, incide de manera progresiva en la formación  integral de los sujetos, al respecto, se hizo necesario desarrollar la presente investigación, cuyo objetivo general fue: Fortalecer el pensamiento espacial y los sistemas geométricos en los estudiantes de noveno grado del colegio Los Santos Apóstoles mediante la estrategia didáctica, la Maleta Viajera de Euclides, para ello, se adelantó una metodología enmarcada en los postulados de la investigación acción, donde se consideró la puesta en marcha de cuatro fases de manera sistemática, al respecto se asumió la planificación en primer lugar, en esta se diseñaron todos los elementos que contendría la Maleta Viajera de Euclides para el desarrollo del pensamiento espacial y los sistemas geométricos en los estudiantes de grado noveno, seguidamente se presenta la acción, donde se ejecutaron las situaciones diseñadas, en este caso, se evidencia un conjunto de intervenciones, las cuales iniciaron con formas geométricas planas, para posteriormente transformarlas en tridimensionales, para lo cual, los estudiantes representaron disposición e interés en el desarrollo de las actividades, las actividades fueron valoradas mediante la observación directa no participante, para dar paso a la reflexión, donde se logró determinar que la Maleta Viajera de Euclides posee un impacto significativo en la enseñanza y el aprendizaje de los conocimientos inherentes al pensamiento espacial y los sistemas geométricos.
Uso de herramientas tecnológicas para la enseñanza de la ciencias en educación media diversificada de acuerdo a la modalidad de estudio a distancia
Authors: Rizales-Semprum Mervin Javier , Gómez-Valderrama Carlos Luis , Hernández-Suarez Cesar Augusto
Published: July 2021

Se tiene como objetivo determinar en los docentes de ciencias, en un Liceo Bolivariano del estado Trujillo – Venezuela, el uso de una plataforma tecnológica en la educación media diversificada de acuerdo con la modalidad a distancia. El método, se desarrolló bajo un enfoque cuantitativo, de tipo descriptivo y diseño de campo. La muestra estuvo conformada por ocho docentes que imparten enseñanza de las ciencias. La información fue recolectada a través de un cuestionario. Se comprobó que el 37,5% de los encuestados si sabe utilizar la plataforma Moodle. Otro 25% dice que algunas veces sabe utilizar la plataforma. Igualmente, el 75% de los encuestados perciben adecuada la modalidad a distancia para la enseñanza aprendizaje del tema. Se evidencio que un grupo significativo de docentes desconocen la plataforma Moodle y con ello su utilidad en el proceso de enseñanza aprendizaje específicamente en la modalidad de educación interactiva a distancia.
El juego como estrategia didáctica para el fortalecimiento de las competencias ciudadanas en la construcción de la paz, en los estudiantes de quinto grado de básica primaria, a través del juego popular denominado la vuelta a Colombia.
Authors: Pérez-Velásquez Juan Carlos , Peñaranda-Mojica Liliana Esperanza
Published: July 2021

El proyecto estuvo basado en el fortalecimiento de las competencias ciudadanas de los estudiantes de una Institución Educativa de Cúcuta, Norte de Santander, en los cuales, por medio de un diagnóstico, se pudo detectar graves falencias en dicho aspectos, y más específicamente en aspectos de convivencia, tolerancia y respeto por la opinión, creencias y opiniones de las personas que los rodean.

Se diseñó y aplico diversas actividades  conducentes a mejorar dichos aspectos, de lo cual se debe mencionar que fueron altamente efectivas, dadas las estrategias aplicadas, en las cuales se tuvo en cuenta la autoestima, la reflexión y la visualización de los propios defectos y virtudes de cada estudiante, se planteó una observación directa, con enfoque cualitativo que permitió establecer que los estudiantes, entre otras cosas, no se apropian de los problemas de su entorno y se les dificulta reconocer sus falencias en lo referente a la convivencia y al respeto por las ideas y creencias de los demás. Los instrumentos que se utilizaron para la recolección de la información fueron el diario pedagógico y rejilla diagnostica. A través del juego denominado “la Vuelta a Colombia” se observó que se fortalecieron  las competencias ciudadanas en los estudiantes de quinto grado donde ellos proponen soluciones prontas y afectivas.

Los resultados fueron socializados a la comunidad educativa y el proyecto se dejó inmerso en un plan de mejoramiento institucional el cual será implementado en todas las áreas, cursos y sedes de la Institución Educativa.
Rendimiento escolar en matemáticas de estudiantes de primaria en el municipio de Tibú Norte de Santander
Authors: Pérez-Cabrales José Trinidad
Published: July 2021

Este proyecto de investigación tiene como propósito indagar sobre los factores sociales económicos, políticos y culturales asociados en el aprendizaje de las matemáticas en estudiantes de básica primaria del municipio de Tibú como zona de conflicto armado.

La investigación realizada se hizo con un enfoque cuantitativo, de tipo descriptivo, En la cual participaron 47 estudiantes 21 padres de familia y 10 docentes.  A los participantes se les aplicó una entrevista enfatizando los factores sociales, económicos y culturales que inciden el rendimiento escolar de los estudiantes.

Dentro de los resultados se evidencia que: los estudiantes son utilizados para realizar trabajos en el campo, además no reciben el apoyo emocional y económico de sus padres en la orientación de sus tareas y la compra de los implementos educativos necesario para el desarrollo de su actividad académica. En cuanto a los docentes del área, no están motivados y por lo tanto no motivan a sus estudiantes y el desarrollo de sus clases son monótonas y aburridas. Los padres de familia en su mayoría son de muy de bajo recursos económicos y su grado de escolaridad es baja. De lo anterior podemos concluir que: existen factores socio-económicos que influyen en el rendimiento escolar de los estudiantes, en el cual están involucrados los docentes, que se siente poco apreciaos por la comunidad educativa, por otra parte, los estudiantes no cuentan con el apoyo y la motivación de los padres y docentes.
Descriptive analysis of personality traits in relation to gender and age of the students of the University of Pamplona at the Villa Rosario campus
Authors: Contreras-Manrique Liliana , Contreras-Manrique Rocío de Belén , Ovalle-Lizcano Tatiana Valentina , Rincón-Leal Jaime Fernando
Published: July 2021

The study of the investigation of personality traits in university students, was developed with a mixed approach and descriptive design whose sample is 200 students from the University of Pamplona, ​​Villa Rosario, through the application of the Minnesota Multiphasic Personality Inventory II, the traits were determined of personality in relation to the gender and age of the students; observing an index in the degree of impulsivity in impulse control; also anxiety traits such as fear, obsessive, anguish in the male gender between the ages of 15 to 17 years; followed by the ages 18 to 25 of the same gender, with tendencies to react with feelings of sadness, and introversion and ideas of mistrust and suspicion. Then, in the female gender between 15 and 17 years old, emotions such as hysteria, extroversion, were present in the students, in a second order; ages 18 to 25 of the same gender, exhibiting being stress and hypochondriasis. In such a way these personality traits influence young university students either in their environment, particularly in the socialization processes with levels of anxiety, feelings of sadness or disorder such as depression, aggressiveness that affect the student in their learning process and interaction with their educational community and in professional training. This research was based on the theory of Erik Erickson, taking into account the stages in the development of the personality and emphasizing stage V (Identity versus Confusion of Roles), stage VI (Intimacy versus Isolation) where it was possible to give the importance, which is a fundamental basis to understand the process of human development, allowing the student to interact in a flexible, harmonious way in the environment that surrounds him.
Structural health monitoring of liquid filled above ground storage tank floors: a time-reversed approach to acoustic emission source location
Authors: Zárate-Hernández Boris Adolfo
Published: July 2021

Acoustic Emission (AE) is a proven successful Non-Destructive Testing (NDT) method to assess the state of storage tank floors. Traditional AE source location in tanks floors is performed using only the wavefronts that have traveled directly from the source to the sensor (direct hit). The wavefronts captured after reflected from the tank walls are identified and discarded. This paper proposes a new AE source location algorithm in tanks that considers a combination of reflections and direct hits. The proposed algorithm is based on time-reversed acoustics and ray theory. The methodology uses the concept of time-reversed acoustics in which a wave detected at any location can be directed back to the source when re-created at the detection place. Therefore, the developed approach takes the time at which each wave arrives to the sensor and sends it back as if time had reversed. Ray theory is used in the methodology to account for the way in which the wavefront is reflected when encounters an obstacle such as the walls of the tank. Then, the point of intersection of all wavefronts is identified using an optimization algorithm. This point where all wavefronts intersect is considered the location of the source. The location algorithm considers the first path or direct hits from the source to the sensors combined with reflections obtained by wavefronts bouncing from the tank walls. The proposed location algorithm was validated using numerical data from 176ft diameter tank and experimentally using AE data from a tank 55ft diameter.
Análisis de herramientas para gestión bibliográfica y control de acceso utilizando tecnología RFID
Authors: Niño-Rondón Carlos Vicente , Duran-Bayona José Daniel , Bermon-Meneses Luis Alexis , Duarte-Parada Duvar Mauricio , Castro-Casadiego Sergio Alexander , Sandoval-Martínez Gloria Esmeralda
Published: July 2021

En este documento se presenta una estrategia para el análisis de herramientas de gestión de recursos y control de acceso a personas en bibliotecas empleando tecnología RFID. Se aplicó una encuesta en escala de Likert para conocer tanto la perspectiva como las expectativas de las personas respecto a la implementación de esta propuesta tecnológica. Asimismo, mediante la técnica de matriz de priorización se definieron las tecnologías de hardware y software de mayor fiabilidad para el control de acceso y gestión de recursos bibliográficos, ponderando parámetros para la selección de herramientas de hardware y software. Conociendo las tecnologías, se planteó la arquitectura inicial del sistema. El instrumento aplicado mostró la necesidad de las personas por la mejora de los servicios convencionales de gestión de librería y control de acceso en bibliotecas. En cuanto a las herramientas de hardware y software, Raspberry Pi 3B+ y el lenguaje de programación Python fueron las seleccionadas para el desarrollo de la propuesta investigativa. La metodología planteada y la arquitectura del sistema pueden ser replicados para estructuras con tecnologías similares basadas en identificación por radiofrecuencia en lugares de alta densidad poblacional.
Detección de placas vehiculares mediante modelo de clasificador en cascada basado en lenguaje Python
Authors: Niño-Rondón Carlos Vicente , Castellano-Carvajal Diego Andrés , Castro-Casadiego Sergio Alexander , Medina-Delgado Byron , Guevara-Ibarra Dinael
Published: July 2021

La detección de placas vehiculares empleando técnicas de aprendizaje automático mejora los procesos de rastreo, seguimiento y seguridad. Se presenta el desarrollo de un modelo de clasificador en cascada para la detección de placas vehiculares, utilizando las herramientas de Python, OpenCV y Cascade Trainer GUI, basadas en código abierto. Las imágenes utilizadas para el procesamiento fueron capturadas mediante una cámara para Raspberry Pi conectada a la placa embebida, en diversos puntos de la zona céntrica de la ciudad fronteriza de Cúcuta, Colombia; posteriormente enviadas a una computadora personal y redireccionadas mediante transformaciones geométricas; y para garantizar el alto rendimiento del sistema de clasificación, se aplican procesos de aumentado de datos, pasando de 245 a 1867 imágenes para el entrenamiento del detector en cascada. El modelo de clasificación tardó 17.4 minutos en crearse, y se probó con imágenes y videos en ambientes reales de la ciudad de Cúcuta, logrando la detección de placas vehiculares de matrículas colombianas y venezolanas con una efectividad del 90.26%.
Filatelia e historia de la ciencia: una biografía filatélico-didáctica de Albert Einstein
Authors: Martínez-Reina Marlon
Published: July 2021

Una biografía filatélico-didáctica es un producto educativo y didáctico, donde se conjugan: la filatelia, un interés profesional y un interés académico. En este caso, se presentan 55 sellos postales para elaborar una biografía filatélico-didáctica de Albert Einstein. La iconografía representada en los sellos, nos recuerda su nacimiento, su maravilloso 1905, el Premio Nobel, la relatividad, su muerte, y de forma póstuma, su reconocimiento como el personaje del siglo XX.
Metaanálisis de la seguridad percibida en el transporte público en la era Covid-19
Authors: García-Lirios Cruz
Published: July 2021

El objetivo de este estudio fue realizar una revisión sistemática de la literatura para conocer las políticas de movilidad metropolitana y salud periurbana. Se realizó un estudio documental, retrospectivo y meta analítico con una selección no probabilística de fuentes indexadas publicadas del 2019 al 2021 y búsqueda con las palabras clave. Se encontró la prevalencia de riesgos relativos derivados de políticas culturales que sustentan la no exposición a eventos sin consecuencias en la salud de los usuarios. Las comparaciones políticas revelan la prevención de los efectos de los eventos de riesgo en la salud de los usuarios. Las políticas preventivas pueden utilizar el metaanálisis para diseñar programas y protocolos de seguridad.
Metodología para el análisis y diseño de circuitos con transistores y diodos en asignaturas de electrónica utilizando una herramienta computacional
Authors: Ramírez-Carvajal Luis Eduardo , Puerto-López Karla Cecilia , García-Ortiz Luilly Alejandro
Published: July 2021

Las herramientas tecnológicas mejoran el rendimiento académico haciendo más dinámicos y eficientes los procesos de enseñanza y aprendizaje. Se presenta una metodología de análisis y diseño de circuitos mediante el uso de una herramienta tecnológica en asignaturas de electrónica de la Universidad Francisco de Paula Santander. Se desarrolló una metodología ágil que consistió en cuatro elementos: planeación, diseño, codificación y prueba. En la planeación se consultaron las fuentes adecuadas y se desarrolló una metodología de análisis y diseño de circuitos con diodos y transistores. En el diseño se utilizó diagramación UML para el modelado del software. En codificación se utilizó lenguaje de programación java y se realizó una interfaz dinámica con la herramienta NetBeans. Finalmente se elaboraron pruebas a la interfaz, que consistieron en llevar a cabo diseños y análisis de circuitos con diodos y transistores, que fueron luego modelados en el software de simulación QUCS para calcular los errores en las variables y avalar la herramienta desarrollada. Los errores en todas las pruebas fueron inferiores al 2%, lo que implica que la interfaz es eficiente, interactiva e incentiva los procesos de enseñanza y aprendizaje haciéndolos más dinámicos.
Hizmet İçi Eğitimlerin Otel Çalışanları Tarafından Değerlendirilmesi: Trabzon Doubletree By Hilton Oteli Örneği
Authors: DOĞAN Özgür , YAVUZ Aydan
Published: July 2021

Eğitim işletmeler ve çalışanlar için hayati bir öneme sahiptir. Sahip olduğu bilgi ve beceri bir çalışanı güçlü kılarken bir işletmeyi de diğer işletmelerin önüne geçirmektedir. İşletmede verilen eğitimler, eğitim alacak çalışanların belirlenmesi, çalışanların ihtiyaç duyduğu bilgi ve becerilerin belirlenmesi, bunların bir program dahilinde çalışanlara kazandırılması ve program başarısının değerlendirilmesi faaliyetlerini içermektedir. Eğitim faaliyetleri literatürde hizmet içi eğitim ve hizmet dışı eğitim şeklinde 2 başlık altında ele alınmaktadır. Eğitim konusu, sürekli gelişen sektör ve değişen müşteri talepleri sebebiyle hizmet sektörü için de oldukça önem arz etmektedir. Bu çalışmanın amacı hizmet sektöründe çalışan personelin hizmet içi eğitime ilişkin algılamalarının belirlenmesidir. Bu çalışma nitel araştırma yöntemlerinden vaka çalışması desenine göre tasarlanmıştır. Çalışma kapsamında Trabzon Doubletree By Hilton oteli personeli örneklem grup olarak belirlenmiş ve veriler mülakat yöntemiyle elde edilmiştir. Elde edilen veriler MaxQda 2020 nitel analiz programı ile analiz edilmiştir. Araştırmanın sonuçları; hizmet içi eğitimin planlanması ve uygulanması, eğitimcinin performansı, eğitimin kazandırdığı beceriler, eğitim konusuna ilişkin talepler ve personelin eğitimle ilgili önerileri başlıkları altında değerlendirilmiştir. Eğitimin zamanlaması, eğitimcilerin etkileşim düzeyleri, eğitimcilerin departman ya da kurum dışından olmayışı, eğitimlerin sistemli ve düzenli verilmemesi, çalışanların temel memnuniyetsizlik konularını oluşturmaktadır.
Double Inlet Left Ventricle with common AV valve, discordant ventriculo-arterial connection and pulmonary atresia: A rare anomaly on fetal echocardiogram with three dimensional spatio-temporal imaging correlation (STIC)
Authors: Sennaiyan Usha Nandhini , Krishna Mani Ram
Published: July 2021

Double Inlet Left Ventricle through a common AV valve is a rare type of
functionally univentricular heart. We report a fetus with double inlet
left ventricle with discordant ventriculo-arterial connection and
pulmonary atresia. The anatomy was readily apparent on three dimensional
rendering by spatio-temporal imaging correlation technique(STIC)
Reactive astrocytes augment hippocampal inhibitory tone via GABA transporter-3/4 to facilitate synaptic balance in Alzheimer’s disease
Authors: Aldabbagh Yousif , Islam Anam , Zhang Weicong , Whiting Paul , Ali Afia
Published: July 2021

Background and Purpose: Cognitive decline is a major symptom in
Alzheimer’s disease (AD), which is closely associated with synaptic
excitatory-inhibitory imbalance. Here, we investigated whether
astrocytic mechanisms involving the astrocyte-specific GABA transporter
3/4 (GAT3/4) play a role in altering the synaptic balance in AD and
whether these mechanisms correlate with presynaptic cannabinoid type-1
receptors (CB1-Rs). Experimental approach: Using the APPNL-F/NL-F
knock-in mouse model of AD, aged-matched to wild-type mice, we performed
in vitro electrophysiological whole-cell recordings combined with
immunohistochemistry in the CA1 and dentate gyrus (DG) regions of the
hippocampus. Comparative neuroanatomy experiments were also performed in
post-mortem brain tissue from human AD patients, age-matched to healthy
controls. Results: We observed a higher expression of GABA content and
GAT3/4 co-localised with reactive astrocytes, which enhanced tonic
inhibition in the CA1, and DG of APPNL-F/NL-F mice compared to the
age-matched wild-type animals. Blocking GAT3/4 - associated tonic
inhibition in APPNL-F/NL-F mice resulted in an enhanced frequency of
synaptic excitation, suggesting a presynaptic mechanism. These data also
correlated with an up-regulation of CB1-Rs in astrocytes and
cholecystokinin (CCK)-containing interneurons, which also enhanced tonic
inhibition in the AD model, but did not affect GAT3/4 -associated tonic
inhibition. The neuroanatomical results were mirrored in post-mortem
tissue of AD patients. Conclusions: Our data suggest that reactive
astrocytes lead to augmented tonic inhibition in the hippocampus, which
probably plays an important presynaptic compensatory role in attempting
to restore AD-associated neuronal hyperactivity. Therefore, reducing
tonic inhibition through GAT3/4 may not be a good therapeutic strategy
for AD.
Strategic Agility and the Global Pandemic: The Agile Organizational Structure, A Theoretical Review
Authors: Arokodare Michael A. , Falana Blessing R.
Published: July 2021

Literature has shown that university institutions cannot survive global pandemic shock-like COVID-19 as well as achieve sound outcomes without putting in place an agile or flexible organizational structure. However, most university institutions in Nigeria especially public university institutions recorded poor outcomes in terms of marketing, customer/student satisfaction and operations management. The purpose of this paper was to establish how agile or flexible organizational structure enhances the link between strategic agility and university institutional outcomes. Considering past empirical studies reviewed, the study proposed that strategic agility has a positive influence on organizational outcomes in institutions of higher education; and that flexible or agile organizational structure has a positive mediating influence on the relationship between strategic agility and organizational outcomes. A conceptual model to guide the further investigation in future studies was developed depicting the interaction between strategic agility and organizational outcomes with flexible organizational structure as a mediator. The paper concluded that agile or flexible organizational structure enhances strategic agility and sound outcomes of university institutions. The study recommended that these institutions must be able to think strategically with an agile mindset, understand mistakes, learn lessons quickly, and continuously adjust and readjust their strategic direction in order to develop innovative ways to create value. They must also empower their academic and non-academic staff teams on dynamic and modern marketing approaches to manage unexpected events to enhance marketing performance, student satisfaction and sound operations management.
A Conceptual Framework on the Corporate Social Responsibility Disclosure: Profitability, Leverage and Company Size
Authors: Lastiningsih Noegrahini , Ermawati
Published: July 2021

This research begins with environmental damage is mostly carried out by companies with the background of company activities related to nature, and companies in Indonesia have not been able to carry out their social responsibilities to the society and the culture in which they operate to their full potential. This phenomenon also proves that the legal basis is not sufficient to motivate companies to carry out CSR as well as possible, but it also making social concerns a priority and part of the company's corporate plan needs engagement and support from management and shareholders. The aim of this research was to find out what factors influence corporate social responsibility disclosure on the Indonesian stock exchange. This study has three objectives namely to find out profitability, leverage and company size for corporate social responsibility disclosure. Therefore, this study relates to the measurement of corporate social responsibility disclosures by companies listed on the Indonesian stock exchange.
The Effect of Leadership Styles on Employee’s Productivity in the Nigerian Oil and Gas Industry
Authors: Olayisade Adegboyega , Awolusi Olawumi D.
Published: July 2021

The purpose of this study is to examine the effect of leadership style on employee productivity in the Nigerian oil and gas industry using Chevron Nigeria Limited as a case study. The study used a five-point Likert scale questionnaire consisting of forty questions covering autocratic, democratic, bureaucratic, laissez-faire, transactional, charismatic leadership styles and employee productivity variables. The questionnaire was deployed to one hundred and twenty-five respondents (125) and received ninety-three (93) valid responses. Statistical Package for the Social Sciences (SPSS) was used to analyze respondent responses. Demographic analysis, normality test, homoscedasticity, multicollinearity, reliability test (Cronbach’s Alpha) were presented; results affirm the validity and reliability of research findings. The results of the descriptive and regression analysis indicate that the autocratic leadership style is the most predominant leadership style in the Nigerian Oil and Gas followed by laissez-faire, bureaucratic, transactional, democratic and charismatic leadership styles. The study concludes that leadership styles significantly influence employee productivity albeit different leadership styles have varying effects on employee productivity and varying leadership styles can co-exist within the same organization. The study highlighted various policy implications and recommendations. This study adds to the existing literature on leadership practice and is intended to be a reference point to scholars and researchers for further studies on leadership practices in the oil and gas industry.
Urea as a complexing agent for selective removal of Ta and Cu in sodium carbonate based alumina chemical–mechanical planarization slurry
Authors: Shukla Arpita , Selvam Victoria , Ramachandran Manivannan
Published: July 2021

This work reports urea as a promising complexing agent in sodium carbonate-based alumina slurry for chemical?mechanical planarization (CMP) of tantalum and copper. Ta and Cu were polished using Na2CO3 (1 wt. %) with alumina (2 wt. %) in the presence and absence of urea. The effect of slurry pH, urea concentration, applied downward pressure and platen rotational speed were deliberated and the outcomes conveyed. Prior to the addition of urea, the Ta removal rate (RR) was observed to increase with pH from acidic to alkaline, having a maximum RR at pH 11. However, Cu RR decreases with increasing pH with minimum RR at pH 11. With the addition of urea in the slurry, a Cu to Ta removal rate selectivity of nearly 1:1 was encountered at pH 11. The addition of urea simultaneous boosts the Ta RR and suppresses Cu RR at pH 11, as it adsorbs on the metal surface. Potentiodynamic polarization was conducted to determine the corrosion current (Icorr) and the corrosion potential (Ecorr). Electrochemical impedance spectroscopy of both metals was carried out in the proposed formulation and the obtained outcomes are elaborated.
Prohibitin Inactivation in Adipocytes Results in Reduced Lipid Metabolism and Adaptive Thermogenesis Impairment
Authors: Gao Zhanguo , Daquinag Alexes C. , Fussell Cale , Djehal Amel , Désaubry Laurent , Kolonin Mikhail G.
Published: July 2021

Prohibitin-1 (PHB) is a multifunctional protein previously reported to be important for adipocyte function. PHB is expressed on the surface of adipose cells, where it interacts with a long-chain fatty acid (LCFA) transporter. Here, we show that mice lacking PHB in adipocytes (PHB adipocyte [Ad]-knockout [KO]) have a defect in fat tissue accumulation despite having larger lipid droplets in adipocytes due to reduced lipolysis. Although PHB Ad-KO mice do not display glucose intolerance, they are insulin resistant. We show that PHB Ad-KO mice are lipid intolerant due to a decreased capacity of adipocytes for LCFA uptake. Instead, PHB Ad-KO mice have increased expression of GLUT1 in various tissues and use glucose as a preferred energy source. We demonstrate that PHB Ad-KO mice have defective brown adipose tissue, are intolerant to cold, and display reduced basal energy expenditure. Systemic repercussions of PHB inactivation in adipocytes were observed in both males and females. Consistent with lower cellular mitochondrial content and reduced uncoupling protein 1 protein expression, brown adipocytes lacking PHB display decreased proton leak and switch from aerobic metabolism to glycolysis. Treatment of differentiating brown adipocytes with small molecules targeting PHB suppressed mitochondrial respiration and uncoupling. Our results demonstrate that PHB in adipocytes is essential for normal fatty acid uptake, oxidative metabolism, and adaptive thermogenesis. We conclude that PHB inhibition could be investigated as an approach to altering energy substrate utilization.
AN ANALYSIS OF SPEECH ACTS IN THE STUDENT’S TEXTBOOK AT THE SENIOR VOCATIONAL HIGH SCHOOL
Authors: Sukmayanthi Ni Made Ika , Tantra Dewa Komang , Santosa Made Hery
Published: July 2021

The current research objectives were to analyse the eleventh grade students’ textbook in the Senior Vocational High School publishes by the Indonesian Ministry of National Education based on the 2013 Curriculum. The research problems were focused on the speech acts’ social functions, linguistic features, and language elements. The research was designed in a qualitative approach. Data were collected through document analysis method. Data were analysed descriptively by classifying the speech acts’ social functions, linguistic features, and language elements. The research was delimited on the verbal acts or speech acts, focusing on their social functions, linguistic structures, and language features as outlined in the 2013 Curriculum (Kemdikbud 2016). The three verbal learning focus assisted students in improving their communicative competence in English. The research findings are, firstly, there were four speech act types found, namely directive, assertive, expressive, and commissive acts. The speech acts’ social functions were ordering, asking, telling, advising, praying, stating, explaining, welcoming, thanking, apologizing, offering and refusing. Secondly, the speech acts’ linguistic features designed were imperative, interrogative, and declarative sentences. Thirdly, the speech acts’ language elements specifically grammatical rules used were simple present tense, simple past tense, present continuous tense, present perfect tense, and past continuous tense.