bluuebunny/crossref_metadata_2025 huggingface dataset:
Role of Agricultural Technology on Socio-Economic Development in Hathras District, Uttar Pradesh
Authors:   Department of Geography, AMU, Aligarh, Ahmad Mumtaj , Islam Pasarul ,   Department of Geography, AMU, Aligarh, Siddiqui Shamsul Haque ,   Department of Geography, AMU, Aligarh
Published: February 2021

Agriculture in India has experienced a significant transformation in the past fifty years, with agriculture being more and more oriented to a productivist form of socio-economic production. Introduction of new agricultural technologies, high yielding varieties of seeds, improve access to irrigation, education, efficient use of fertilizers and extension services are capable of enhanced productivity per unit of land. Increased production further reflects on socio-economic transformation in rural communities. The study uses secondary data from various sources published by the Government of India and the Government of Uttar Pradesh. The study covers the period between 2000-01 and 2014-15 to analyze the role of agricultural technologies on socio-economic transformation in Hathras district. The methodology adopted for the present study are Data Interpolation or Extrapolation, Yang’s Crop Yield Index, Dayal’s Labour Productivity, Data Standardisation technique Z- score, and Composite Z score. The study concludes that the district has experienced tremendous technological changes in agricultural practices, agriculture induced better productivity and productivity further leads to overall socio-economic transformation.
Land use and cropping pattern change in Chandauli District, Uttar Pradesh: A geographical analysis
Authors:   Department of Geography (MMV), B.H.U. Varanasi, Singh Akhilesh Kumar , Singh Arun Kumar ,   Department of Geography (MMV), B.H.U. Varanasi
Published: February 2021

Observation of land uses is an important tool to assess surface change at different spatio-temporal scales. There are six categories of land use discussed in which agricultural land-use class one. Any plan or policy related to agriculture land use brings a change in agricultural performance and cropping patterns. Apart from this, the cropping pattern is also governed by the law of comparative advantage concerning Agro-climatic conditions. The present paper focuses on the changes that have taken place in land use and cropping pattern in Chandauli district from 2000-01 to 2015-16. The study reveals that there has been a significant change in land use pattern and cropping pattern as settlement class of land use increase 22.72 per cent in 2015 and the area of rice and wheat crops increase 12829 ha. and 9767 ha. respectively from 2000-01 in the study area.
Assessing landslide vulnerability in Kohima city, Nagaland: A geospatial approach
Authors:   Department of Geography, Nagaland University (Central), Lumami, India, Kedovikho Yhoshu , Krishnaiah Y.V. ,   Department of Geography & Disaster Management, Tripura University (Central), Suryamaninagar, Tripura, India
Published: February 2021

Kohima located in the Eastern Himalaya of Northeast India experience numerous landslides and soil creeps annually. Landslides, the resultant of various interactions i.e., geological, geomorphologic, meteorological factors etc., caused immense loss economically and environmentally. Kohima city experiences the torrential amount of rainfall which further aggravate landslide hazard. This paper implores the use of high-resolution satellite data for deciphering landslide vulnerability mapping through remote sensing and GIS technique. Factors such as land use and land cover, lithology, lineament, drainage, road, aspect and slope were used as thematic input layers for landslide vulnerability mapping. The bivariate statistical method particularly Information Value method was used to extract the information from the landslide and the various controlling factors to generate the landslide vulnerability map. Validation of the landslide vulnerability mapping using classification and R-index methods along with ground observation were used to create the final vulnerability map.
Assessment of Land use /Land cover changes using Landsat data series: A case study of Chandauli district
Authors:   Professor, department of Geography, Institute of Science, B.H.U. Varanasi-221005, INDIA, Goswami Kaushalendra Prakash , Yadav Sushil Kumar ,   Research Scholar, Department of Geography, Institute of Science, B.H.U. Varanasi, Shekher Himanshu ,   Research Scholar, Department of Geography, Institute of Science, B.H.U. Varanasi
Published: February 2021

The rapid growth of population, urbanization, economic activities and natural phenomena have affected and simultaneously changed the land use land cover pattern. The main aim of this study is to gain a quantitative understanding of land use land cover changes in Chandauli district from 2000 to 2019. The maximum likelihood supervised classication in ERDAS imagine and ARC GIS software is applied in this study for the preparation of land use land cover maps and analysis of the pattern of land cover through satellite data for the years 2000, 2010 and 2019. The classication of land use land cover is divided into nine major classes i.e. water bodies, sand, cropland, built-up land, fallow land, wasteland, dense forest, open forest and scrub forest. Change detection analysis was also included in this analysis. The general pattern of LULC in this area includes an expansion of Fallow land (18.31 per cent), built-up land (13.43 per cent), open forest and water bodies as well as a reduction in the wasteland (12.59 percent) and dense forest areas in the reference period (2000-2019). The result also indicates that the dominating forest cover exists in southern Chandauli district. The mapping of land use land cover classes is also helpful in the study of change detection and natural resource management.
Image Segmentation to Secure LSB2 Data Steganography
Authors: Zaini H. G.
Published: February 2021

A digital color image usually has a high resolution, thus its size is good enough and the image can be used as a covering (holding) image to hide secrete messages (short and long). The methods commonly used for data steganography, e.g. LSB and LSB2 are not secure, so in this paper, a method of securing the LSB2 method is proposed. The proposed method is based on wavelet packet decomposition. The levels of decomposition will be kept in secret and one of the resulting segments will be used as a covering segment. MSE, PSNR, hiding time, and extraction time will be experimentally analyzed to prove that the proposed method is capable of handling the process of hiding secret messages, either sort or long.
Decentralized Virtual Impedance-based Circulating Current Suppression Control for Islanded Microgrids
Authors: Abu Bakar A. , Pathan E. , Khan M. K. , Sadiq M. A. , Rabani M. I. , Goli S. B. , Pathan F. , Shaikh M. A.
Published: February 2021

Parallel connected inverters in islanded mode, are getting momentous attention due to their ability to increase the power distribution and reliability of a power system. When there are different ratings of Distributed Generation (DG) units, they will operate in parallel connection due to different output voltages, impedance mismatch, or different phase that can cause current to flow between DG units. The magnitude of this circulating current sometimes can be very large and damage the DG inverters and also cause power losses that affect power-sharing accuracy, power quality, and the efficiency of the Microgrid (MG) system. Droop control, improved droop control, and virtual impedance control techniques and modifications in the virtual impedance control technique are widely used to suppress the circulating current. However, the addition of the virtual impedance to each inverter to compensate the output impedance is resistive or inductive in nature. The resistive nature of the output impedance always causes a certain voltage drop, whereas the inductive nature of the output impedance causes phase delay for the output voltage. Both problems are addressed by the proposed control mechanism in this paper. Negative resistance, along with virtual impedance, is utilized in the proposed control strategy. The output impedance is to be maintained as inductive in nature to achieve good load sharing in droop control MGs. The simulation results validate the proposed control scheme.
Application of Ultrasonic Measurements for the Evaluation of Steel Fiber Reinforced Concrete
Authors: Gebretsadik B. , Jadidi K. , Farhangi V. , Karakouzian M.
Published: February 2021

This study investigates the feasibility of the application of ultrasonic measurement to characterize Steel-Fiber-Reinforced Concrete (SFRC). Specifically, the effects of steel fiber content, age, moisture content, and fiber orientation on Ultrasonic-Pulse-Velocity (UPV) were investigated. In this regard, beam and cylindrical samples were fabricated with different steel fiber contents. The result indicated that for beam specimens the UPV increases with the addition of fiber up to 2% and decreases for higher fiber percentages. Additionally, the fiber orientation within the beam specimens influences the UPV measurements. For cylindrical samples, the rate of UPV decreased with the addition of steel fiber reinforcement. In addition, it was discovered that the curing period affects the magnitude of UPV.
Logo Detection Using Deep Learning with Pretrained CNN Models
Authors: Sahel S. , Alsahafi M. , Alghamdi M. , Alsubait T.
Published: February 2021

Logo detection in images and videos is considered a key task for various applications, such as vehicle logo detection for traffic-monitoring systems, copyright infringement detection, and contextual content placement. The main contribution of this work is the application of emerging deep learning techniques to perform brand and logo recognition tasks through the use of multiple modern convolutional neural network models. In this work, pre-trained object detection models are utilized in order to enhance the performance of logo detection tasks when only a portion of labeled training images taken in truthful context is obtainable, evading wide manual classification costs. Superior logo detection results were obtained. In this study, the FlickrLogos-32 dataset was used, which is a common public dataset for logo detection and brand recognition from real-world product images. For model evaluation, the efficiency of creating the model and of its accuracy was considered.
Seismic Evaluation of the RC Moment Frame Structure using the Shake Table
Authors: Ullah H. , Rizwan M. , Fahad M. , Shah S. A. A.
Published: February 2021

This paper presents the findings of an experimental investigation on a reinforced concrete frame structure (ordinary moment resistant frame). The test model was subjected to lateral excitation employing the 1994 Northridge earthquake accelerogram. The reinforced concrete test model was fabricated in 1:3 reduced scale acquiring dimensional similarities. The utilized ingredient mix ratio was 1:1.65:1.75 and the water to binder ratio was 0.47. The dynamic characteristics (natural frequency and elastic viscous damping) were calculated using the free vibration record. Story shear, drift, and displacement profiles were drawn using multiple excitation records along with damage patterns and capacity curves. The natural frequency of 2.47Hz was calculated for the test specimen, which is equivalent to 1.41Hz for the prototype. Structural damping (elastic viscous) of 12.36% was calculated for the prototype.
Experimental and Numerical Analysis of Bubbles Distribution Influence in BubbleDeck Slab under Harmonic Load Effect
Authors: Mahdi A. S. , Mohammed S. D.
Published: February 2021

Reducing a structure’s self-weight is the main goal and a major challenge for most civil constructions, especially in tall buildings and earthquake-affected buildings. One of the most adopted techniques to reduce the self-weight of concrete structures is applying voids in certain positions through the structure, just like a voided slab or BubbleDeck slab. This research aims to study, experimentally and theoretically, the structural behavior of BubbleDeck reinforced concrete slabs under the effect of harmonic load. Tow-way BubbleDeck slab of 2500mm×2500m×200mm dimensions and uniformly distributed bubbles of 120mm diameter and 160mm spacing c/c was tested experimentally under the effect of harmonic load. Numerical analysis was also performed with the ABAQUS software. The results of the adopted numerical model were in acceptable agreement with the experimental results. The numerical analysis presented by the bubbles distribution effect was carried out for the BubbleDeck two-way slab under the effect of harmonic load through the evaluated numerical model. Two cases were considered in which the distribution kept the critical positions of the slab free from the bubbles. The results proved that bubbles distribution significantly affected the structural behavior.
Cutting Parameter Optimization in Finishing Milling of Ti-6Al-4V Titanium Alloy under MQL Condition using TOPSIS and ANOVA Analysis
Authors: Nguyen V. C. , Nguyen T. D. , Tien D. H.
Published: February 2021

Titanium and its alloys give immense specific strength, imparting properties such as corrosion and fracture resistance, making them the right candidate for medical and aerospace applications. There is a wide range of engineering applications that use titanium alloys in a variety of forms. The cost of these alloys is slightly higher in comparison to other variants due to the problematic extraction of the molten process. To reduce costs, titanium alloy products could be made by casting, isothermal forging, radial swaging, or powder metallurgy, although these techniques require some kind of finishing machining process. Titanium and its alloys are difficult to machine due to skinny chips leading to a small cutting tool-workpiece contact area. The thermal conductivity of titanium alloys is too low and the stress produced is too large due to the small contact area, which results in very high cutting temperatures. This paper deals with the experimental study of the influence of the Minimum Quantity Lubricant (MQL) environment in the milling of Ti-6Al-4V alloy considering the optimization of surface roughness and production rate. Taguchi-based TOPSIS and ANOVA were used to analyze the results. The experimental results show that MQL with vegetable oil is successfully applied in the milling of Ti-6Al-4V. The research confirms the suitability of TOPSIS in solving the Multiple Criteria Decision Making (MCDM) issue, by choosing the best alternative at Vc=120m/min, fz=0.065mm/tooth, and ap=0.2mm, where the surface roughness and material removal rate are 0.41µm and 44.1492cm3/min respectively. Besides, ANOVA can be used to predict the best parameters set in the milling process based on the regression model. The parameters predicted by ANOVA analysis do not coincide with any implemented parameters
Optimized Deep Learning for Enhanced Trade-off in Differentially Private Learning
Authors: Geetha P. , Naikodi C. , Suresh L.
Published: February 2021

Privacy and data analytics are two conflicting domains that have gained interest due to the advancements of technology in the big data era. Organizations in sectors such as finance, healthcare, and e-commerce take advantage of the data collected, to help them enable innovative decision making and analysis. What is sidelined is the fact that the collected data have associated private data of the individuals involved, and may be exploited and used for unjustified purposes. Defending privacy and performing useful analytics are two sides of the same coin, and hence achieving a good balance between these is a challenging scenario. This paper proposes an optimized differentially private deep learning mechanism that enhances the trade-off between the conflicting objectives of privacy, accuracy, and performance. The goal of this paper is to provide an optimal solution that gives a quantifiable trade-off between these contradictory objectives.
Vitamin D and Covid-19
Authors:   Cabinet de Rhumatologie, Sétif, Algérie, Boularouk Adnane , Rahal Fadia ,   Service de rhumatologie CHU Beni Messous, Alger - Algérie, Bencheikh Siham
Published: February 2021

La vitamine D est une hormone stéroïde vitale synthétisée essentiellement de façon endogène sous l’effet des rayons ultraviolets sur la peau, mais aussi présente dans certains aliments (origine exogène), qui a un effet immuno-modulateur en stimulant l’immunité innée via la sécrétion de peptides antiviraux. Des publications récentes suggèrent que la carence en vitamine D pourrait compromettre les fonctions immunitaires respiratoires augmentant ainsi le risque d’infection par la COVID-19 mais aussi le risque de formes graves et de mortalité. La vitamine D induit la prolifération et la production cytokinique des cellules NK. Il est de plus en plus admis que la vitamine D joue un rôle dans L’immunité innée et adaptative et qu’elle limiterait les conséquences néfastes de l’immunopathologie induite par les agents infectieux. Ainsi la supplémentation en vitamine D pourrait réduire le risque de développement et de formes graves de la COVID 19 si instaurée précocement, avant une éventuelle atteinte pulmonaire, son efficacité n’est pas certaine dans les formes évoluées. Il a été également suggéré qu’une supplémentation en magnésium avec des suppléments de vitamine D serait bénéfique, car le magnésium aide à réguler l’homéostasie phosphatée et calcique. Il est donc recommandé une dose quotidienne de 800 UI/jour de cholécalciférol (ou équivalent). Des études randomisées contrôlées de large ampleur, en termes de taille et de typage clinique des populations, sont à mener afin de déterminer dans quelle mesure la gestion de la pandémie à Sars-CoV2 pourrait passer par celle de la carence vitaminique D.
Virtual tourism on the example of the defunct Koscelisko medieval church in the North-Western Slovakia
Authors:   Technical University of Košice, Faculty of Mining, Ecology, Process Control, and Geotechnology, Institute of Earth Resources, Department of Geo and Mining Tourism, Košice, Slovakia, HRONČEK Pavel , WEIS Karol , ČECH Vladimír
Published: February 2021

The primary objective of this paper is to present opportunities for creating virtual 3D models of defunct historical buildings, reconstructed on the basis of archival and field research, and the effective promotion and visualisation of such models through a thematic web application. The secondary objective is to increase the tourism potential and attractiveness of the various historical sites and the studied region. The comprehensive methodical processing of documents and the creation of 3D models of objects and other digital visualisation requires not only high-quality programmers and graphic artists, but especially scientists who create historically-relevant descriptive texts, real schemes, and historically acceptable models that can be computer-processed, visualised, and used as an effective tool for the development of tourism. Research and follow-up activities require an interdisciplinary approach, i.e. the cooperation of experts from various disciplines. The research processed in this study points out that even simple, now widely available modern means of communication, such as websites, can be effectively used for the promotion and publicity of this type of attraction. High-quality 3D models and visualisations of buildings and specific destinations, or cultural and technical monuments, can thus become available to tourists also outside museums. This paper introduces the opportunities of digital presentation of preserved, partially defunct and, especially, completely defunct historical buildings and sites that are often almost unknown to tourists. In many cases, only their shells or foundations remain. In terms of cultural heritage conservation and monument protection, these sites are often among the most important religious buildings from various historical periods. This study focuses on the Middle Ages and locations in Slovakia (former Hungary), and presents a methodology that is generally applicable for the research and visualisation of any similar cultural sites, and thus opening up their potential to tourists.
Impacts of Forest Resource Use Conflicts on Conservation Efforts within Enderit Forest Block in Mau Forest Complex, Kenya
Authors:   University of Nairobi, Kenya, KITHIIA Shadrack Mulei , KOECH Robert Kipkemoi ,   Institution of Surveyors of Kenya
Published: February 2021

This paper examined the relationship between forest resource use conflicts and conservation, which are contemporary issues in the field of environment conservation. The study was carried out in Enderit forest block, Mau forest Complex. The study findings indicate that the forest block has lost considerable vegetation cover in the recent past due to resource use conflict which in turn attracted conservation efforts from various stakeholders. The identified conflicts not only threaten the sustainability of these efforts but also community livelihoods that depend on this vital resource in the long term. The study therefore sought to establish the types of forest resource use conflicts, identify the stakeholders and their areas of focus and examine how the forest resource conflicts are affecting forest conservation efforts. Both quantitative and qualitative research methods were used. The results indicate that there exist various forms of conflicts within the forest block while various actors are involved in the forest conservation efforts. However, despite the concerted conservation efforts, there existing forest resource use conflicts that frustrate these efforts and slow the implementation of conservation programs. Based on the findings, the study recommends that for sustainable conservation of the forest block, the Government and the stakeholders should put in place policy measures aiming at increasing income and generating off-farm employment activities for the forest adjacent communities. This will reduce forest dependency and consequently enhance biodiversity conservation and sustainable use of the forest resources.
Corrosion of Additively Manufactured Stainless Steels—Process, Structure, Performance: A Review
Authors: Schindelholz Eric J. , Melia Michael A. , Rodelas Jeffrey M.
Published: February 2021

The corrosion of additively manufactured (AM) metallic materials, such as stainless steels (SS), is a critical factor for their qualification and reliable use. This review assesses the emerging knowledgebase of powder-based laser AM SS corrosion and environmentally assisted cracking (EAC). The origins of AM-unique material features and their hierarchal impact on corrosion and EAC are addressed relative to conventionally processed SS. The effects of starting material, heat treatment, and surface finishing are substantively discussed. An assessment of the current status of AM corrosion research, scientific gaps, and research needs with greatest impact for AM SS advancement and qualification is provided.
Causalidad del plagio en el ámbito académico
Authors: Tamayo Guajala Lady Priscila , Castillo Jiménez Dariana Gissel , Apolo Castillo Josselyn Esthefania , Tinitana Ordoñez Andrés Geovanny
Published: February 2021

El plagio o fraude académico es uno de los principales problemas que ha surgido junto a la mano de la emersión de las tecnologías y fuentes de internet, del mismo modo debido a la facilidad de encontrar la información en la red no siempre la información es verdadera y no son más que pseudo datos, por dicha razón se consideró conocer cuáles son las causas del plagio y la falta de uso de documentación de fuentes de manera adecuada para la realización de trabajos académicos, siendo como principales causas el hecho de el desconocimiento de las personas sobre como investigar de manera adecuada de fuentes confiables, el no saber cómo realizar un correcto parafraseo y como no se aplican consecuencias judiciales a los que incumplen con plagio. Dando como resultado la recopilación de datos que brindan información acerca de cuáles son las normas que se deben cumplir para no infringir con plagio, además de las consecuencias que conlleva hacer este delito.
Aproximación a la didáctica de la computación
Authors: Espinoza Freire Eudaldo Enrique , Guamán Gómez Verónica Jacquelinez , Rivera Ríos Alex Rodrigo
Published: February 2021

La enseñanza y aprendizaje de la computación irrumpió en los espacios educativos sin una didáctica propia, situación que ha sido superada mediante la construcción epistémica de una teoría enriquecida por las aportaciones praxiológicas instrumentales, tanto como objeto de estudio como de medio de apoyo al proceso docente-educativo. El presente artículo busca una aproximación a la información actualizada sobre este asunto; para lo cual se desarrolló un estudio de revisión bibliográfica, sustentado en los métodos histórico-lógico, análisis de contenido y hermenéutico. Entre los principales hallazgos se significan, los fundamentos de la didáctica de la computación en las aportaciones de Piaget, Vygotsky y Ausubel sobre la teoría constructivista. El aprendizaje mediado por la computadora se puede asumir desde dos posicionamientos: el aprendizaje con el ordenador y el aprendizaje a través del ordenador. Los métodos activos son los recomendados en la didáctica de la computación para propiciar el aprendizaje significativo y valores éticos.
Tablero estratégico para el cambio, plan para el desarrollo
Authors: Bonne Falcón Eduardo Nicolás , Tellez Rodríguez Niurka
Published: February 2021

Las crecientes demandas que se producen de forma natural y otras por política de los órganos decisores en función de alcanzar la satisfacción de las crecientes necesidades de la población, imponen más y más exigencias a todas las organizaciones de la estructura de la sociedad. Las contextualizaciones obligan a los gestores a proyectar las alternativas más efectivas para asumir las exigencias de los cambios, sean esos de índole organizacional, estructural, funcional, u otro. El Tablero Estratégico para el Cambio (TEC), es una herramienta para la transformación y el desarrollo, para la actuación colectiva, simple por áreas y de acciones personales bien orientadas, las que necesitan de escribirse y de constituirse en un documento orientador de las transformaciones. En las organizaciones, donde son diversas, convergentes, simples y complejas las acciones a cumplir, sí es muy importante tenerla bien escritas, bien definidas y bien orientadas hacia los objetivos colectivos.
Palabras clave:
Visión integral para el cambio desde el Tablero Estratégico, movilidad de la organización institucional promovido desde el tablero estratégico, la conquista de la efectividad una misión para mejorar la calidad de vida.
ABSTRACT
The increasing requests that are  produced spontaneously and another one for policy of the organs decision makers in terms of attaining the satisfaction of the increasing needs of the population, they force more and more on requirements all of the organizations of the structure of the society. All country, with his natural resources and his social and productive infrastructures, with his roads of interior commerces and exteriors, affected his administrative and entrepreneurial institution is forced in the position of constant way to contextualizar for the various universal crises that today they coexist. The Strategic Chessboard for the Change, a tool for transformation and development, for the collective, simple acting for areas and actions in personam well guided, they are in need of writing to each other and of getting constituted in a guiding document of transformations. In the organizations, where actions are various, convergent, simple and complex to do one's job, definitely you are very important to have it good written, clear-cut and very guided toward the collective objectives.
Keywords:
Integral vision for the change from the Strategic Board, mobility of the institutional organization promoted from the strategic board, the conquest of the effectiveness a mission to improve the quality of life.
El desempeño profesional pedagógico de los entrenadores de levantamiento de pesas con adolescentes limitados físicos motores
Authors: Hernández Simón Leandro , Frómeta Moreira Noralmis , Caballero Riera Luis Orlando , León Reyes Borys Bismark
Published: February 2021

La presente investigación estuvo dirigida a elaborar una estrategia de superación para propiciar el mejoramiento del desempeño profesional pedagógico de los entrenadores del deporte Levantamiento de Pesas, en el trabajo con adolescentes limitados físicos motores, del municipio Santiago de Cuba. Por consiguiente, se realizó una revisión documental, además se utilizaron métodos del nivel teórico favoreciendo el trabajo con conceptos, leyes, categorías, y métodos empíricos permitió la interacción directa entre el sujeto y el objeto de la investigación. Les brinda respuesta a las necesidades de los adolescentes limitados físicos motores, al incorporarse a la práctica sistemática de actividades físicas en el deporte adaptado y capacitará un profesional con herramientas pedagógicas competente para atenderlo, además de contar con un documento de referencia científica. Al valorar la estrategia de superación, contribuye al desarrollo de la formación de profesionales para la Cultura Física y Deporte con una visión reflexiva de las dificultades profesionales durante la atención al deporte adaptado.
Palabras Claves:
Desempeño profesional pedagógico, Adolescentes, Levantamiento de Pesas, Deporte adaptado, Limitados físicos motores.
ABSTRACT
The present research was aimed at developing an overcoming strategy to promote the improvement of the pedagogical professional performance of the weightlifting sport trainers, in the work with adolescents with limited physical motor skills, of the Santiago de Cuba municipality. Therefore, a documentary review was carried out, in addition to using theoretical level methods favoring the work with concepts, laws, categories, and empirical methods using direct interaction between the subject and the object of the research. It provides a response to the needs of adolescents with limited physical motor skills, by incorporating the systematic practice of physical activities in adapted sport and will train a professional with competent pedagogical tools to serve them, in addition to having a scientific reference document. When assessing the improvement strategy, contribute to the development of the training of professionals for Physical Culture and Sports with a reflective vision of professional difficulties during attention to adapted sport.
Cuestionario de burnout de Maslach (MBI-Ed) dirigido a los docentes de la Facultad de Ciencias Sociales de la Universidad Técnica de Machala
Authors: Serrano Polo Oscar Rodolfo , Carriel Román Alicia del Pilar , Sánchez Barreto Ximena Del Rocio
Published: February 2021

El objetivo de esta investigación estuvo dirigido a determinar el estado actual de manifestación e intensidad del Síndrome de Burnout, en los docentes de la Unidad Académica de Ciencias Sociales en la Universidad Técnica de Machala, que contribuya a la ejecución de estrategias de intervención. En su ejecución se emplearon los siguientes métodos: la revisión bibliográfica y documental, el método de observación, en su variante observación participante, Cuestionario Maslach Burnout Inventory (MBI), que se aplicó a una muestra de 43 docentes de esta universidad y la Escala WHOQOL-BREF para la evaluación de la calidad de vida de los docentes. Dentro de sus principales resultados están: La mayoría de docentes no atraviesan por niveles altos o crónicos de estrés laboral. Un gran por ciento expresa una calidad de vida percibida alta y ninguno la considera baja. De acuerdo a lo registrado por la encuesta, no disfrutan de bienestar o satisfacción en cuanto a la oportunidad de realizar actividades de ocio, recreativas o físicas. Se concluye que, el estrés laboral, presentado por los docentes universitarios no se encuentra en niveles altos o crónicos, sin embargo ocasiona agotamiento emocional que de no ser disminuido, podría interferir en el adecuado desarrollo de sus actividades laborales
Actitudes hacia el fraude académico en estudiantes angolanos de Magisterio
Authors: Peña Martínez Yomara , Dos Santos Saraiva Júnior
Published: February 2021

La investigación tuvo por objetivo caracterizar las actitudes fraudulentas de los alumnos del 13ro grado de la Escuela de Magisterio Daniel Vemba en Mbanza Congo, Zaire, Angola. Se estudiaron 100 alumnos y 15 profesores correspondientes a ese grado escolar, para lo cual fueron aplicados cuestionarios a ambas partes, en función de analizar los componentes cognitivo, afectivo y comportamental de las actitudes de los alumnos frente al fraude académico. Como principal resultado está la presencia de disonancia cognitiva en sus actitudes, debido a que perciben como inaceptable y negativo el fraude (componente cognitivo), pero tienen conductas que representan diferentes formas de fraude (componente comportamental).
Konstruksi Dan Kinerja Prototipe Alat Pengering Pati Sagu Tipe Rotari Bersumber Panas Biomassa
Authors: Aman Wilson Palelingan , Jading Abadi , Roreng Mathelda K.
Published: February 2021

Penelitian mengenai pengeringan pati sagu menggunakan alat pengering tipe rotari dengan sumber panas pengering berasal dari pembakaran biomassa melalui tungku telah dilakukan. Tujuan penelitian ini adalah untuk merancang prototipe alat pengeringan pati tipe rotari (rotary dryer) dengan panas pengering bersumber dari tungku pembakaran biomass, menguji kinerja alat pengering dan untuk mengetahui mengetahui sifat-sifat fisikokimia pati hasil pengeringan. Penelitian ini dilakukan dengan metode perancangan dan eksperimen. Hasil dari penelitian ini adalah berupa prototipe alat pengering pati tipe rotari dengan sumber panas pengering dari biomassa hasil pembakaran. Dimensi prototipe alat pengering yang dihasilkan adalah Diameter 0,5 m, Panjang 4 meter, dengan kapasitas 100-200 kg per proses. Kisaran suhu tungku pembakaran sebesar 219oC - 589oC, suhu pada bagian masukan sebesar 42 oC-52 oC dan suhu pada bagian keluaran alat berkisar 33oC-35 oC. Hasil pengukuran awal kadar air pati yang dihasilkan dalam proses pengeringan selama 2 jam adalah 16-18% basis basah. Kandungan amilosa dan amilopektin bervariasi pada kadar air pati yang berbeda. Kandungan Amilosa pati hasil penelitian berkisar 16,32-18,15%, sedangkan amilopektin berkisar 77,77-84,63%.
Sifat Fisik, Kandungan Fitokimia dan Aktivitas Antibakteri Minyak Essensial Kulit Batang Akway (Drimys piperita Hook f.)
Authors: Zakariyah Muhammad , Cepeda Gino Nemesio , Hutasoit Hostalige
Published: February 2021

Minyak essensial merupakan produk cairan yang diperoleh melalui proses ekstraksi dari berbagai bagian tumbuhan aromatik. Akway (Drimys piperita Hook f.) merupakan salah satu jenis tumbuhan aromatik yang memiliki kulit batang yang mengandung minyak essensial. Konsentrasi dan jenis senyawa penyusun minyak essensial sangat menentukan sifat fisik, kimia dan antibakterinya. Penelitian ini bertujuan untuk menentukan sifat fisik dan kandungan fitokimia minyak essensial kulit batang akway serta potensi antibakterinya terhadap pertumbuhan bakteri patogen. Proses ekstraksi minyak essensial kulit batang akway dilakukan menggunakan metode distilasi air. Pengujian sifat fisik yang dilakukan meliputi warna, kelarutan dalam alkohol dan indeks refraktif sedangkan pengujian kandungan kualitatif fitokimianya meliputi terpenoid, flavonoid, alkaloid dan saponin. Pengujian aktivitas antibakteri dilakukan pada konsentrasi 0-10% dengan metode difusi cakram di dalam medium agar. Hasil menunjukkan bahwa minyak essensial kulit batang akway memiliki warna jernih kekuningan, kelarutan 1 : 2 dalam alkohol 80%, dan indeks refraktif sebesar 1,4942. Minyak essensial kulit batang akway mengandung terpenoid, flavonoid, alkaloid dan saponin serta dapat menghambat pertumbuhan bakteri patogen dengan konsentrasi hambat tumbuh minimum sebesar 2,7-5,0 mg/ml.
Kandungan Senyawa Fenolik Dan Terpenoid Ekstrak Etilasetat Daun Drimys piperita
Authors: Cepeda Gino Nemesio , Lisangan Meike Meilan , Silamba Isak
Published: February 2021

Tumbuhan obat Drimys piperita dikenal dengan nama lokal “akway” adalah tumbuhan aromatik yang tumbuh  di wilayah Pegunungan Arfak Papua Barat. Tumbuhan ini memiliki batang yang berwarna coklat kemerahan,  rasa pedas juga memiliki daun yang tebal dan berwarna hijau. Masyarakat lokal yang bermukim di Pegunungan Arfak memanfaatkan akway sebagai tumbuhan untuk pengobatan malaria. Tujuan penelitian ini adalah untuk mengetahui kandungan senyawa fenolik dan terpenoid ekstrak etilasetat daun akway. Ekstraksi komponen fitokimia daun akway dengan pelarut etilasetat dilakukan menggunakan metode perendaman dengan waktu 3 hari. Fraksinasi senyawa terpenoid ekstrak etilasetat dilakukan menggunakan larutan KOH 5% dan HCl 5%. Hasil penentuan kandungan total fenol dan flavonoid menunjukkan ekstrak etilasetat akway mengandung total fenol dan flavonoid masing-masing 33,25 mg EAG/g dan 3,05 mg EQ/g ekstrak. Senyawa penyusun utama fraksi terpenoid ekstrak etilasetat daun akaway adalah caryophyllene 14.43%, isopatchoulane 11,60%, 7-methanoasulen 6,21%, humulene  4,76%, Octadecane 4.24%, t-phytol 3.46%, linalool 3,20% dan 1,8-cyclotetradecadiyne 3,16%. Ekstrak etilasetat daun akway berpotensi sebagai sumber senyawa pencegah penyakit jantung,  antikanker, aktivitas antidiabetes, antimikroba, antiviral, antioksidan, antiinflamasi dan antikarsinogenik.
COVID-19, un desafío para la educación inclusiva en el Perú
Authors: Laderas Huillcahuari Edison , Huauya Quispe Pedro , Coaquira Cárdenas Víctor Alcides
Published: February 2021

En el presente trabajo de investigación, cuyo objetivo es analizar la coyuntura del COVID-19, como un desafío para la educación inclusiva en Perú; cuyo enfoque es cualitativo de nivel descriptivo, diseño de investigación documental, se utilizó técnica de análisis documental cuyas fuentes de información fueron las publicaciones periódicas y revistas científicas. En esta crisis política educativa en un estado de emergencia sanitaria, frente a un enemigo invisible COVID-19, los estudiantes de los diferentes niveles evidencian dificultades en el manejo tecnológico, baja señal de internet en zonas alto andinas del Perú, falta de recursos y equipos tecnológicos, tanto de estudiantes y docentes. Con un sistema educativo muy precario y que no sólo se trata de hablar de inclusión de personas con discapacidad, tiene que ver también en integrar a todos según su diversidad cultural. La equidad en la educación entonces, debe tener como base que la educación es un derecho universal con una oportunidad inclusiva de educación virtual, por tanto, se tiene que sustentar en la equidad, justicia, tolerancia y la aceptación de las diferentes maneras de comprender y vivir la realidad.
Fast Ensemble Empirical Mode Decomposition Using the Savitzky Golay filter
Authors: MOHGUEN WAHIBA , BEKKA RAÏS EL’HADI
Published: February 2021

Empirical mode decomposition (EMD) is a powerful algorithm proposed to analysis of nonlinear and non-stationary signals. The phenomenon of mode mixing is one of the major disadvantages of the EMD. The Ensemble EMD (EEMD) was introduced to eliminate the mode-mixing effect. The principle of EEMD is to add additional white noise into the signal with many trials. The noise in each trial is different; and the added noise can be completely cancelled out on average, if the number of trials is very high. The number of trials is a high computational load. The improvement on computational efficiency of EEMD is therefore required. In this paper, an improvement on the computing time of the EEMD was proposed by replacing white noise with white noise filtered using Savitzky-Golay (SG) filter. Numerical simulations were performed to demonstrate that such replacement has effectively reduced the number of trials to obtain a noise-free reconstructed signal.
Performance comparison of some censoring CA-based CFAR processors in heterogeneous environments
Authors: ZATTOUTA B. , MESSIKH L.
Published: February 2021

Performance comparison of automatic censoring CA-based CFAR processors contribute to the development of more efficient censoring detectors. In this paper, the authors analyze the performance of the detection schemes which named: ACCA-odv- (Automatic Censored Cell Averaging -ordered data variability-), ADCCA- (Automatic Dual Censoring Cell Averaging-), ACGCA- (Automatic Censoring Greatest Cell Averaging-), and GGDC- (Goodness-of-fit Generalized likelihood test with Dual Censoring-)-CFAR's in heterogeneous environments. The assumed environments are represented by three situations: first, the homogeneous situation, second, the presence of interfering targets, and the third case is allowed to the presence of clutter edges. The obtained results, under the assumption of a Gaussian clutter and a mono pulse processing, show that most of the studied detectors perform well in a specific conditions and there is a need to further developments to ensure the required performances for recent target detection application.
Fault Diagnostic of Doubly-Fed Induction Generator in Stator Inter-Turn Short Circuit Based Wind Turbine
Authors: Boumalha N. , Hachelef R. , Kouchih D. , Tadjine M. , Boucherit M.S.
Published: February 2021

This paper describes a Fault Tolerant Control (FTC) of a doubly-fed induction generator (DFIG) based wind turbine model suitable for the simulation of this generator in the mode faulty mode. The dynamic model of a DFIG with stator inter-turn short circuit fault is proposed. A model (abc) is developed, which can represent both the healthy and faulty conditions. The DFIG is directly connected to the grid whereas the rotor winding is fed by back-to-back PWM converters .the Control schemes for active and reactive power regulation are designed firstly. Under different wind speed, maximum power point tracing (MPPT) control is implemented to ensure the optimum active power output. The numerical simulation developed in Matlab/Simulink studies the effects of stator inter-turn short-circuit in the DFIG. Afterward, the application of Approach technique of Adaptive Obs
Design of Standalone Micro-Grid Systems Using Teaching Learning Based Optimization
Authors: RECIOUI Abdelmadjid , DASSA Khaled
Published: February 2021

Meeting the load demand reliably and efficiently is the most important issue of any electrical system. Installing huge off grid hybrid power systems to deliver enough power is economically unwise. Therefore, it is necessary to minimize the size and number of units of the off-grid power system components and operate the system under an appropriate power management strategy to ensure efficient system operation. The successfulness of installing an off grid power system in remote areas depends on the total net present cost occurs during the lifetime of the project. In this work, optimization of off grid power system component sizing is performed using two tools: Homer and a metaheuristic optimization method that has been recently developed, the Teaching Learning Based Optimization (TLBO).
Optimal placement of power factor correction capacitors in power systems using Teaching Learning Based Optimization
Authors: Bouaraki Mouloud , RECIOUI Abdelmadjid
Published: February 2021

This paper presents a method to optimize the placement of capacitors in a distribution system to correct power factor and reduce losses and costs. The method uses the Teaching Learning Based Optimization (TLBO) method to solve the optimal capacitor placement problem. The combinatorial nature of the problem suggests the employment of a mixed binary and real valued TLBO algorithm. To validate the efficiency of the method, it was applied to various examples (different bus systems) and simulation results are discussed.
PLC-Based Safety Instrumented System of a Boiler using HAZOP
Authors: CHAFAI Mahfoud , OUADI Abderrahmane , BENTARZI Hamid
Published: February 2021

HAZOP Analysis is used to determine great deviations which will affect the operational safety of a boiler of an existing petrochemical plant that may affect on persons, material and the environment. PLC is proposed to provide the safety function to fit into the overall machine control system as a safety-related part. It reads from the temperature, pressure sensors via its input interface modules and outputs commands in the case of critical deviation via the output module to the final control elements such as actuators allowing an improvement in the safety of the overall boiler system.
High Precision Roll/Yaw Attitude Stabilization for Flexible communication satellite
Authors: Benmansour J. E , Khouane B. , Rima R.
Published: February 2021

The aim of this paper is to realize high-precision attitude stabilization for roll/yaw axes of flexible communication satellite while attenuate the effects of the elastic vibrations and multiple disturbances such as solar radiation and model uncertainties. a composite control has been designed which is comprise two part an anti-disturbance proportional-derivative (PD) controller is designed to stabilize the attitude while rejecting the effects of flexible vibrations, environmental disturbances, and unmodelled dynamics, whose are assumed as an extended state. This controller comprises two parts, i.e. an extended state observer and a PD controller with feedforward. First, flexible vibrations, environmental disturbances and unmodelled dynamics are regarded as an extended state, which can be estimated by the proposed observer. The estimated extended state can be compensated by feedforward where the attitude can be stabilized by the PD controller. Numerical simulation results are presented to demonstrate the effectiveness of the control scheme.
Combining MUSIC Spatial Sampling and Bootstrap to Estimate Closed Space DOA for Few Samples
Authors: HADJ IRID SIDI MOHAMMED , KAMECHE SAMIR
Published: February 2021

DOA estimation in array processing uses MUSIC (Multiple Signal Classification) algorithm, mainly. It’s the most investigated technique and is very attractive because of its simplicity. However, it meets drawbacks and fails when only very few samples are available and the sources are very close or highly correlated. In these conditions, the problem is more intricate and the detection of targets becomes arduous. To overcome these problems, a new algorithm is developed in this paper. We combine bootstrap technique to increase sample size, spatial sampling and MUSIC method to improve resolution. Through different simulations, the performance and the effectiveness of the proposed approach, referred as spatial Sampling and Bootstrapped technique ‘’SSBoot’’, are demonstrated.
TCR Antenna For Small Satellite Application
Authors: KOURDI Z. , KARA ALI O.
Published: February 2021

The results of this study are interesting about antenna technology generation used in small satellite. A new design optimized of the TCR (tracking, command and ranging) antenna has been presented. It has a good impedance matching to the 50 Ohm coaxial line which has been radically enhanced with different geometric features. For the Ku band frequency band, the VSWR of 1.15 is not exceeded. In its optimized version, it is compact and aesthetic and this property reduces antenna distortions. Design considerations for this antenna performance in terms of coverage gain, side lobe isolation, and cross-polar isolation are discussed. The paper also discusses the possibilities of extending the frequency coverage of the antenna system into the Ku-band system can increase the capabilities and operational flexibility of existing earth stations as well as adapts with new current and future technology trends are presented.