bluuebunny/crossref_metadata_2025 huggingface dataset:
La ciencia como medio para alcanzar el conocimiento científico
Authors: Calva Nagua Daniel Xavier , Granda Ayabaca Andrea Nataly , Daquilema Cuásquer Brígida Amalin
Published: February 2021

El presente trabajo, aborda un análisis de como la ciencia influye en el desarrollo de la sociedad, particularizando desde su conceptualización básica y aplicada y el método empleado para su consecución, la información corresponde a fuentes bibliográficas de carácter científico. En el ensayo académico se analizó la importancia que tiene la enseñanza de las ciencias, enfatizando algunas valoraciones teóricas tales como la definición, la fundamentación de la ciencia básica y la ciencia aplicada y una contextualización del método científico; así como, una aproximación a lo que se entiende por conocimiento y las características que poseen las ciencias. Para lo cual, la metodología empleada se basó en la revisión heurística de textos científicos, desde un enfoque cualitativo que permitieron describir las ideas que se exponen a lo largo del trabajo. A manera de conclusión se puede mencionar que sin ciencia no hay evolución humana y que con la ayuda del método científico, el cual consta de varias etapas, se permite llegar a la verdad de los hechos, una verdad que jamás es absoluta, mas, cuyos resultados servirán como base para nuevos planteamientos de procesos investigativos y de desarrollo social-tecnológico.
Sistema Informático para Gestionar Información del Claustro de Programas Académicos de la Educación Superior en Cuba
Authors: Espinosa Palenque Alfredo Rafael , Mazaira Fernández Jorge Luis , Medina Martínez Osmel D. , Pérez de Armas Marle
Published: February 2021

El Sistema de Evaluación y Acreditación de la Educación Superior establecido por la Junta de Acreditación Nacional en Cuba evalúa para los diferentes programas académicos cinco variables claves: pertinencia e impacto social, claustro, estudiantes, infraestructura y currículo. La variable claustro se enfoca en revelar toda la in formación pertinente que fundamenta la calidad del mismo, por lo que se necesita recopilar y evidenciar un volumen importante de datos e información. La presente investigación desarrollada en la Universidad de Ciencias Médicas de Cienfuegos, posee como objetivo fundamental el desarrollo de un sistema informático para la gestión de la información relacionada con la variable claustro según los criterios establecidos por la Junta de Acreditación Nacional en su Sistema de Evaluación y Acreditación. Para ello se utiliza la metodología de desarrollo de software seguida fue Rational Unified Process y el lenguaje de modelado Unified Modeling Language. Como herramienta principal se estableció: Visual Paradigm para UML 8.0 Enterprise Edition para la modelación los requerimientos. Como principal resultado se obtiene un software para gestionar toda la información del claustro de los diferentes programas académicos de la Educación Superior en Cuba.

Palabras clave:

sistema informático, evaluación, acreditación, educación superior.

 

ABSTRACT

The Higher Education Evaluation and Accreditation System established by the National Accreditation Board in Cuba assesses five key variables for the different academic programs: relevance and social impact, faculty, students, infrastructure, and curriculum. The cloister variable focuses on revealing all the pertinent information that underpins its quality, so it is necessary to collect and evidence a significant volume of data and information. The present research developed at the University of Medical Sciences of Cienfuegos, has as its main objective the development of a computer system for the management of information related to the cloister variable according to the criteria established by the National Accreditation Board in its Evaluation and Accreditation. For this, the software development methodology followed was Rational Unified Process and the Unified Modeling Language modeling language. The main tool was Visual Paradigm for UML 8.0 Enterprise Edition for modeling the requirements. As the main result, a software is obtained to manage all the information of the cloister of the different academic programs of Higher Education in Cuba.

Keywords:

Computer system, evaluation, accreditation, higher education.
La computación en la nube en los espacios educativos
Authors: Benítez Flores Cristian Rafael , Granda Ayabaca Diana María , Jaramillo Alba Jorge Andrés
Published: February 2021

La Computación en la Nube es un concepto tecnológico cuya aplicación en los espacios educativos es aún insuficiente. Con el objetivo de analizar el uso de la computación en la nube con fines educativos, en aras de contribuir a su conocimiento y divulgación se desarrolló el presente estudio descriptivo fundamentado en los métodos de observación científica, histórico-lógico, revisión bibliográfica y analítico-sintético, así como en la técnica de análisis de contenido. Entre los principales hallazgos se significan: el conocimiento de la Computación en la Nube como modelo tecnológico que permite el acceso a archivos, aplicaciones y servicios almacenados en el ciberespacio mediante internet los que pueden ser compartidos; para lo que no se necesita contar con memoria en el ordenador personal, ni de un sistema operativo específico. A pesar de sus beneficios aún no se utiliza plenamente en los espacios educativos.
Modelado del sistema automático de descargas e implementación del módulo de descargas automáticas
Authors: Carrasco Viera Jesús Alejandro , Cruz Moreira José Ignacio
Published: February 2021

La presente investigación se llevó a cabo en la Universidad de Cienfuegos con el fin de diseñar un sistema informático e implementar el módulo de Descargas Automáticas para el control, seguimiento y procesamiento automático de las solicitudes de descargas hechas por parte de los usuarios de la red de dicho centro. Para el desarrollo de la aplicación informática se utilizó la arquitectura cliente-servidor y el patrón Modelo Vista Controlador; se usó Python como lenguaje de programación del lado del servidor y el framework Django. El Sistema de Gesión de Base de Datos usado fue PostgresSQL, el Proceso Unificado de Desarrollo de Software como metodología de desarrollo de software, Visual Paradigm para UML como herramienta CASE y PyCharm como Entorno de Desarrollo Integrado. El sistema desarrollado mantiene un control del flujo de información que hasta ahora ocurría de forma manual y gestiona todas las solicitudes de descargas de los usuarios. Además, el módulo de Descargas Automáticas se encarga de procesar las descargas, informar a cada usuario el estado de su descarga y a cada administrador cualquier error que ocurra al procesar las solicitudes. También elimina cada archivo descargado luego que pase un determinado tiempo en los servidores. De esta forma se logró mejorar el proceso de solicitud de descarga en todos sus aspectos.
Palabras clave:
descarga, sistema automático de descarga, tareas programadas.
ABSTRACT
This research was carried out at the University of Cienfuegos in order to design a computer system and implement the Automatic Downloads module for the automatic control, monitoring and processing of download requests made by users of the Internet. said center. For the development of the computer application, the client-server architecture and the Model View Controller pattern were used; Python was used as the server-side programming language and the Django framework. The Database Management System used was PostgresSQL, the Unified Software Development Process as a software development methodology, Visual Paradigm for UML as a CASE tool and PyCharm as an Integrated Development Environment. The developed system maintains a control of the information flow that until now occurred manually and manages all the users' download requests. In addition, the Automatic Downloads module is responsible for processing downloads, informing each user of the status of their download and each administrator of any error that occurs when processing requests. It also deletes each downloaded file after it spends a certain time on the servers. In this way, the download request process was improved in all its aspects.
Keywords:
download, automatic download system, scheduled tasks.
ATEL, agente de telecomunicaciones. Una experiencia digital
Authors: García Roque Dairon Ian , Sosa López Dailyn , Prieto Santana Bunny
Published: February 2021

El proyecto Atel se engloba dentro del área de desarrollo de aplicaciones móviles. Ofrece a la División Territorial Cienfuegos contar con una herramienta de trabajo para el mejoramiento del servicio a la población, ofreciendo una ventaja competitiva en estos momentos en que las TICs toman el mando y el teléfono móvil es el dispositivo a través del que más se accede a Internet. Atel, denominada por sus siglas Aplicación de Telecomunicaciones, estuvo inspirada en la necesidad urgente de proteger a nuestros usuarios haciéndole valer sus derechos como consumidores. Esta novedosa aplicación, única en el país propiciará el intercambio con nuestros productos y servicios, además de buscar en nuestra Red de Ventas (localización), el punto de contacto más cercano al usuario, con sus horarios establecidos, dirección y número telefónico. Facilitará filtrar por consejos populares el Agente de Telecomunicaciones, identificando cuáles servicios brindan: pago de la factura telefónica, la compra de cupones y/o tarjetas telefónicas. Cuenta además con un módulo para acciones rápidas de consulta y compra de paquetes. Otras de las bondades será permitirle al usuario contar con informaciones de primera mano cómo son los niveles de atención a las quejas y los días de atención a la población, así como las vías para establecer el reclamo con la novedad de hacerlo on_line in_situ a través del correo electrónico hacia la cuenta atencion.usuarios@etecsa.cu   También, a través del código QR ubicado en cada estación de trabajo, el usuario podrá evaluar cómo percibe el servicio y/o producto. Esta apk consume servicios web alojada en un servidor de Etecsa.
La innovación didáctica. Su necesidad en el perfeccionamiento del modo de actuación profesional del maestro
Authors: Infante Villafañe Martha
Published: February 2021

El artículo aborda la importancia de la innovación didáctica como requisito de la actuación profesional de los educadores. Se parte de su necesidad en los actuales momentos de desarrollo tecnológico y de promover en los estudiantes un aprendizaje desarrollador. Se efectuó la revisión de la literatura especializada en la temática en las diferentes bases de datos, luego se procedió a realizar la triangulación teórica con el fin de llegar a síntesis y conclusiones parciales. Entre los principales hallazgos se destacan sobre la importancia que el docente asuma una concepción del desarrollo de la personalidad sobre la base de su unidad cognitiva afectiva del educando, emplear métodos que propicien el desarrollo intelectual y favorecer el desarrollo de la personalidad del educando y la capacidad para realizar aprendizajes a lo largo de la vida. A manera de conclusión se puede mencionar que la innovación didáctica en la formación docente implica la formación de profesionales con un profundo compromiso social, elevar la eficiencia del trabajo científico y profesional, formar en el trabajo, lo que significa aprender haciendo y participar activamente en la revolución científico - técnica y educacional.
Prototipe Mesin Pengekstrak Pati Sagu Tipe Stirrer Rotary Blade Bertenaga Pedal
Authors: Darma Darma , Mangallo Bertha , Rumere Charles
Published: February 2021

Ekstraksi pati sagu secara tradisional tidak efektif dan tidak efisien, dan sebagai konsekuensinya sebagian besar pohon sagu yang telah siap dipanen milik masyarakat terutama di Provinsi Papua dan Papua Barat dibiarkan terbuang begitu saja oleh pemiliknya. Masyarakat di daerah tersebut masih menggunakan pengolahan secara tradisional karena kekurangan peralatan mekanis. Jutaan ton pati yang terkandung pada batang sagu tidak dimanfaatkan dan terbuang sia-sia setiap tahunnya. Tujuan penelitian ini adalah mendesain dan menguji kinerja prototype mesin ekstraksi pati sagu tipe stirrer rotary blade bertenaga pedal. Mesin ini terdiri dari 5 komponen utama yaitu (a) Tabung ekstraksi yang dilengkapi dengan saringan, (b) Komponen transmisi daya, (c) Rangka utama,(d) Pipa penyalur suspensi pati dan (e) Pengaduk . Pada penelitian ini digunakan 3 taraf ratio driver pulley:driven pulley yaitu 6:1, 4:1 dan 3:1 yang diuji pada 3 level periode waktu ekstraksi yaitu 5, 10 dan 15 menit. Evaluasi kinerja dilakukan dengan mengukur variabel (a) Kapasitas ekstraksi, (b) Rendemen pati, (c) Hasil pati dan (d) Persentase pati pada ampas. Hasil pengujian kinerja mesin menunjukkan bahwa semakin lama periode waktu ekstraksi, semakin rendah kinerjanya, sebaliknya semakin besar ratio driver pulley:driven pulley maka semakin tinggi kinerja mesin. Kinerja tertinggi diperoleh dengan menggunakan ratio 6:1 pada periode waktu ekstraksi 5 menit.   Kinerja mesin pada kondisi tersebut adalah (a) Kapasitas ekstraksi 120 kg ela/jam, (b) Rendemen pati   20,6 %, (c) Hasil pati 24.6 kg/jam dan (d) Persentase pati pada ampas 0.3 %.
Pengembangan Alat Pemisah Minyak Kelapa Murni/ Virgin Coconut Oil (VCO) Berpengaduk
Authors: Reniana Reniana , Edowai Desi Natalia
Published: February 2021

Metode pengadukan/stirring adalah salah satu cara dalam membuat minyak kelapa murni/Virgin Coconut Oil (VCO) tanpa melewati proses pemanasan. Banyaknya VCO yang dihasilkan dari proses ini dipengaruhi oleh beberapa faktor diantaranya jenis kelapa, kecepatan pengadukan, jumlah baffle dan jenis impeller. Untuk meningkatkan efisiensi kinerjanya maka perlu dilakukan pengembangan dalam hal modifikasi bagian fungsional berupa baffle dan impeller. Dari hasil penelitian, telah dihasilkan alat pemisah VCO berpengaduk dengan kinerja dan kontruksi yang sederhana dimana kinerja terbaik diperoleh pada waktu pengadukan 4 menit dengan kapasitas kerja efektif 72,50 liter santan/jam dan rendemen hasil 17,78 %.
Uji Lapang Mesin Pemarut Sagu Tipe Silinder Bertenaga Motor Bakar Bensin
Authors: Darma Darma , Faisol Arif , Selano Mario M.
Published: February 2021

Bengkel permesinan agroindustri Fateta Unipa telah menghasilkan berbagai prototype mesin pemarut sagu, salah satu diantaranya yaitu tipe silinder menggunakan sistem pemarutan dengan pengupasan kulit batang.  Suatu prototype mesin wajib dilakukan uji lapang agar diketahui kinerja mesin pada kondisi yang sesungguhnya (real condition). Tujuan penelitian ini adalah pengujian lapangan mesin pemarut sagu tipe silinder bertenaga motor bakar bensin.  Uji lapang dilakukan di Distrik Masni, Kabupaten Manokwari dengan melibatkan 2 keluarga pemilik dusun sagu.  Evaluasi kinerja mesin pada kondisi lapang dilakukan dengan mengukur parameter (a) kapasitas pemarutan, (b) rendemen pati, (c) hasil pati, (d) kehilangan pati pada ampas dan (e) konsumsi bahan bakar bensin.  Dari hasil uji lapang menunjukkan bahwa semua bagian mesin berfungsi dengan baik dan petani dengan mudah dapat mengoperasikan mesin tersebut. Selama pengujian tidak ditemui adanya kendala teknis.  Performansi mesin pada kondisi lapang yaitu:  (a) kapasitas pemarutan 621 kg/jam, (b) rendemen pati 41,5%, (c) hasil pati 479 kg/pohon, (d) kehilangan pati pati pada ampas 6,79% dan (e) konsumsi bahan bakar 1,05 liter/jam.
Sifat Fisik dan Organoleptik Mie Kering dengan Penambahan Tepung Ubi Jalar dan Tepung Kedelai
Authors: Situngkir Risma Uli , Sarungallo Zita Letviany , Sarungallo Rosalia S.
Published: February 2021

Penelitian ini bertujuan untuk menentukan sifat fisik dan organoleptik mie yang terbuat dari tepung ubi jalar dan dan tepung kedelai. Mie terbuat dari 100% tepung terigu (kontrol), tepung ubi jalar 10%, dan kombinasi tepung ubi jalar dan tepung kedelai dengan rasio 10%: 5% dan 10%:10%. Analisis mie termasuk sifat fisika (warna dan kehilangan memasak) dan uji organoleptik (warna, rasa, keseluruhan, kelembutan dan lengket) dibandingkan dengan mie kontrol. Hasil penelitian ini menunjukkan bahwa penambahan 10% ubi jalar memberikan kontribusi warna oranye dan peningkatan warna, rasa, dan penerimaan secara keseluruhan tanpa kelembutan yang berbeda dan akseptabilitas lengket dengan kontrol, tetapi nilai cooking loss meningkat. Sementara penambahan  tepung kedelai dalam formula dapat meningkatkan cooking loss,  mengurangi kecerahan warna  dan sifat organoleptik mie.
Condiciones de la innovación pecuaria y producción de lácteos en comunidades altoandinas
Authors: Rosas Morales Diana
Published: February 2021

Resumen

El estudio explora las condiciones de los cambios ocurridos en la actividad pecuaria del de dos comunidades del sur andino de Perú, a partir de la innovación en los procesos de producción de ganado vacuno para la obtención de leche. Se utilizó una metodología mixta que involucró el desarrollo de entrevistas y encuestas con las familias de productores del distrito de Ocongate. Se evidencia el incremento de cabezas y criadores de vacunos, mejoras de la producción de leche, incremento de los ingresos familiares, así como otros cambios en la vida familiar de los productores. Además, se argumenta que la participación de instituciones gubernamentales y privadas coadyuvó a la innovación pecuaria.
Comparing Middle School Students’ Responses to Narrative Versus Expository Texts on Situational and Individual Interest
Authors:   Northern Illinois University, Durik Amanda , McGee Steven ,   The Learning Partnership, Hansen Edward ,   Northern Illinois University, Duck Jennifer ,   The Learning Partnership
Published: February 2021

This project examined the effects of text genre on both situational and individual interest. Middle school students completed a three-session web-based learning module in the domain of ecology wherein they were randomly assigned to either narrative or expository readings that were matched on key idea units and other variables. Students reported individual interest in ecology on the day before and after their exposure to the module. Affective and cognitive situational interest was measured after the readings on each day of the module. The results showed that expository readings were perceived as more helpful for learning than were narrative readings, but this varied somewhat by initial individual interest. Although the narrative versions did not facilitate situational interest, there was a small effect on individual interest suggesting that learners exposed to narrative readings came to perceive the domain of ecology as a more meaningful discipline than did those exposed to expository readings.
Sensitivity Enhancement of Methane Detection Based On Hollow Core Photonic Crystal Fiber
Authors: Boufenar R. , Bouamar M. , Hocini A.
Published: February 2021

Monitoring methane (CH4) concentration is essential in many industrial and environmental applications. Emission of such gases is indeed important to detect for health, safety and environmental reasons. The major risk in all these areas is an explosion hazard, which may occur if methane reaches its Lower Explosive Limit (LEL) of5% concentration in air. For that reason, it is necessary to develop gas sensors to monitor that methane levels below this value. Due to a weak absorption of methane, this gas is difficult to detect using conventional methods.Hollow core photonic crystal fibers (HC-PBF) have emerged as a promising technology in the field of gas sensing. The strong interaction achievable with these fibers are especially advantageous for the detection of weakly absorbing regions of methane. In this paper, we investigated, by full vectorial finite element method (FV-FEM) in Rsoft CAD environment, the dependency of relative sensitivity on the fiber parameters and wavelength. Consequently, we introduced the optimal structureof an index guiding hollow core photonic crystal fiber capable of measuring methane concentrations down to 0.1%in air. The simulations showed that the sensing sensitivity increased with an increase in the core diameter and a decrease in the distance between centers of two adjacent holes.
comparatives study of steganography and steganalysis tools
Authors: Leila BENAROUS , Mohamed DJOUDI , Ahmed BOURIDANE
Published: February 2021

Steganography is one of the oldest methods of secure communication. It was an art at the beginning, now became a science. It aims to conceal secret messages or data inside an innocent cover. Steganalysis is the science that can detect and extract hidden data. Many steganography and steganalysis tools exist, a lot of them are free which makes it easy for anyone to use these tools. In this paper, a comparative study will be done between two widely used steganography tools (StegHide and OurSecret) and between three steganalysis tools StegSpy, StegSecret and Hidden data detector.
A New Model of Numerical MHO Distance Relay Associated with Power Swing Detector
Authors: MATI Ayache , BOUSAADIA Baadji , BENTARZI Hamid
Published: February 2021

In conventional transmission line protection, a distance relay is used to provide the primary as well as backup protection. The voltage and current phasors measurement needed by the distance relay for determining the impedance may be affected by the power disturbances such as power swing. Consequently, this power swing may cause mal-operation of Zone three distance relays which in turn may affect on the reliability of the whole protective scheme. Many power swing blocking functions (PSB) have been developed to mitigate these effects. In this paper, a new model of Mho distance relay with dual-quadrilateral power swing detection characteristic has been developed and implemented first in PC using LabVIEW, then tested using Power System Simulink Model under different faults and power swing conditions. Finally, the relay prototype has been realized using acquisition card NI USB-6009, which acquires real-time signals of the currents and the voltages, processes them digitally and outputs tripping or blocking signal to the circuit breaker. The obtained results show that the relay provides good discrimination between a fault and power swing condition.
IMC Multi-Controller Strategies applied on a Manipulator Robot
Authors: Zennir Y. , Guechi E. , Chetioui L. , Bendib R.
Published: February 2021

The paper focuses on the use of multi-controller approach to control a robot wrist (STÄUBLI robot RX 90). The descriptions of a nonlinear mathematical model of the process have been presented with the local parametric models around operating points. Controller design of a conventional PID, IMC control, LQG control and Hv (loop shaping) has been described around each selected operating points for each local parametric models. Finally , in order to show the efficiency of the proposed method, some simulation results in CAO 3D solid-works and MATLAB environments are given.
DVR and D-STATCOM Mitigation Techniques of Power Quality Effects on Induction Motors
Authors: DEKHANDJI Fatma Zohra , DOUCHE Mohamed , ZEBIDI Nacer
Published: February 2021

Power quality disturbances have always been a major concern among engineers. Any slight variation in voltage amplitude or frequency can cause customer equipment to fail, at a substantial cost in time and money.In this project we will use some mitigation techniques to protect the induction motor from excessive temperature (additional losses and high currents) and the rotor vibration torque pulsation caused by power quality disturbances.These mitigation techniques reduce the effects of the power quality disturbances on the induction motor, where the simulations done using MATLAB/SIMULINK.
Robust Sliding Mode Control for Novel Type of Parallel Robot
Authors: INEL Fouad , ZENNIR Youcef
Published: February 2021

In this paper we present a new control architecture based on the robust sliding mode control applied to control a nonlinear system (parallel cable robot). This approach is widely used to address the uncertainties and disturbances of nonlinear systems and to improve the performance of the robot in terms of tracking a desired path. A dynamic model is presented followed by the description of the control approach used. To do this, numerical simulations were carried out by developing a specific code including a graphical user interface for a user-friendly real time. The simulation results for a dynamic model with sliding mode control are discussed for different trajectories applied to this robot, to confirm the validity of accurate tracking of a desired path before future work description.
Rotor Speed and Flux Estimation of a Doubly-fed Induction Machine Using Extended Kalman Filter
Authors: Boussoufa Ahmad , Kidouche Madjid , Ahriche Aimad
Published: February 2021

This paper uses Extended Kalman Filtering method (EKF) to estimate the rotor speed and flux of a Doubly-fed Induction Generator (DFIG) to be used in Wind Turbines (WTs). DFIGs are widely used in WTs because they can generate an electric power of constant voltage amplitude and frequency which allow a direct connection between the WTs and the ac power network. A DFIG modeling in the (dq) reference frame is presented and a brief description of EKF algorithm is described to estimate the rotor speed and flux. Simulations results are shown and discussed.
Sensorless Speed and Reactive Power Control of a Double-Feed Induction Generator using Adaptive Observer in Wind Turbine Power Plant
Authors: BOUMALHA NOUREDDINE , KOUCHIH DJILLALI , BOUCHERIT MOHAMED SEGHIR
Published: February 2021

This work presents a new method for the synthesis of a sensorless speed and reactive power control applied to a wind turbine system based to a Doubly Fed Induction Generator (DFIG). The proposed method based on adaptive observers: The rotor speed is adapted using adaptation mechanisms. Stability analysis based on Lyapunov theory is used to guarantee the stability of the observer. To verify the consistency of the proposed approach. We will be interested in the study of vector control based on the synthesis of classical controllers. Simulation results provided with the MATLAB/SIMULINK environment show the consistency of the proposed approaches.
Impact of NBTI Stress on VDMOSFET Regions
Authors: Merah Sidi Mohammed , Nadji Bouchra
Published: February 2021

In this paper, we investigate the impact of negative bias temperature instability (NBTI) degradation on both channel and drain regions, of commercial power double diffused MOS transistor (VDMOSFET), using capacitance-voltage method (C-V). We report that the degradation is important at channel (drain) region in p-channel VDMOSFET (n-channel VDMOSFET). That means that the phosphorus doped region (n-type) is more sensitive to NBTI stress.
Theoretical and Experimental Investigation of the Supply Voltage Unbalance Effects on Squirrel Cage Induction Motors
Authors: DEKHANDJI Fatma Zohra , BENTARZI Hamid
Published: February 2021

Voltage unbalance is one of the power quality problems causing a lot of ill effects on induction motors. These are namely: Overheating, line-current unbalance, derating, torque pulsation, and inefficiency. The objective of the present work is to assess and quantify the effects of voltage unbalance on induction motors using both theory and experimentation. The analytical study is performed using the complex voltage unbalance factor model of this problem. The work deals specifically with the influence of the variations in the complex angle of the voltage unbalance factor on the stator and rotor currents, stator and rotor copper losses and total losses. The experimental investigation is carried out using an apparatus that measures currents, torque and power losses.
Risk Assessment of a Gas Plant (Unit 30 Skikda Refinery) Using Hazop &Bowtie Methods, Simulation of Dangerous Scenarios Using ALOHA Software
Authors: BENDIB Riad , MECHHOUD Elarkam , BENDJAMA Hanane , BOULKSIBAT Halima
Published: February 2021

Process plant and chemical processes are complex and large systems, consisting of thousands of devices interacting with each other [76][45]. The structure of this type of industrial plants lead to difficulties in process control, hence deviations from the operation objectives or desired states. These deviations creates abnormal situations that drive products out of specification, increased operational costs, shut downs and even worse they can cause accidents, which may lead to damages of equipment, environment and affect the health. identifying hazards is fundamental for ensuring the safe design and operation in process plants. Based on the idea of learning from accidents, several techniques and standards are available to identify hazardous situations and help companies to build up strategies to avoid the hazards. In this s work we present a study based on two methods BOWTIE and HAZOP methods applied for an LPG a plant for gas separation located in SKIKDA refinery which is considered as the most important refinery in Algeria where the treatment capacity reaches more than 15 millions tones per year of crude oil. Several recommendations raised from our study to improve the safety of the plant particularly since it is considered as an old plant start working since 1980. The study is completed by simulating the deduced dangerous scenarios using ALOHA software.
Particle Swarm Optimization for tuning a Fuzzy Supervisory Controller Parameters (Takagi Seguno and Mamdani Engines)
Authors: BENDIB Riad , HAMMADI YOUC , MAZOUZI Mohammed , MECHHOUD Elarkam
Published: February 2021

Steam generation systems are a crucial part of most power plants. Therefore, boiler control is an important problem for power plants that are frequently changing load or subject to sudden load disturbances, which are common in current market driven electricity industry. Hence, the control of such processes needs the design of more effective controllers. Although Fuzzy logic controllers seem more adequate for controlling chemical processes, since they provides solutions to incompletely defined and nonlinear processes industrials does not prefer such type of controllers since the tuning of these controllers requires the adjustment of a large number of parameters, which is tedious. The fact that let the industrials prefer the use of simple PID controllers rather than complicated fuzzy or neural controllers. Hence in this paper a simple PD controller is used to control the steam flow parameters of whereas its parameters are deduced using fuzzy supervisory controller the parameters of the supervisory controller are optimized using particle swarm optimization algorithm, the most known inference Engines SEGUNO and MAMDANI are considered.
Assessment of the Common Cause Failure(CCFs) effect on Safety Instrumented System(SIS) by usign the Fault Tree Analysis (FTA) method
Authors: Metatla Hassina , Rouainia Mounira
Published: February 2021

The reliability of the safety-instrumented system (SIS) has received a lot of attention during the past decade, with the emergence of the new standards such as International Electrotechnical Commission IEC61508, and IEC61511, that provides a general framework for the design and implementation of these safety barriers. Among the problems influencing on the global SIS reliability: Common Cause Failure (CCF), which contributes too many accidents, that has a negative impacts, so it must be considered in the risk and reliability assessment for these systems. The aim of this work is to focus on the effects of common cause failures (CCFs) on the reliability of a SIS, by implementing a comparative SIS dependability study with and without consideration the CCFs, using the beta factor model, and the fault tree analysis (FTA) method.
Level Control of Quadruple Tank Process using Laguerre Functions based Model Predictive Control Algorithm
Authors: Menighed Kamel , CHEKAKTA Issam
Published: February 2021

This paper aims to present a model predictive controller based on discrete state-space modeling, where the future control trajectory is approximated by a set of discrete-time Laguerre functions instead of shift forward operators. The benefit of using these orthonormal Laguerre functions is that they have fewer parameters to adjust in the optimization problem and the computation load is significantly lower than the standard predictive control. The effectiveness of this controller is illustrated through the quadruple tank process, which is a highly interacted, multivariable and constrained system.
Covid-19 Epidemic Control Strategy Using Risk Analysis and Decision Making Tools
Authors: CHAFAI Mahfoud , ZITOUNI Abdelkader , BENTARZI Hamid
Published: February 2021

Mitigation of the major risk caused by the Coronavirus epidemic must be approached in a scientific manner by using methods and tools of risk analysis and management. In order to develop an effective strategy, emergency plan based on these methods for minimizing human losses whatever the scenario that may arise in the future may be established.
Design Optimization of PMU Anti-Aliasing Filters using Taguchi Method
Authors: DEKHANDJI Fatma Zohra
Published: February 2021

A Phasor Measurement Unit (PMU) is a monitoring device, which serves in checking the power system condition by measuring voltage and current phasors along with frequency at a particular node. The basic structure of PMU consists of Synchronization Unit, Measurement Unit and Data Transmission Unit. The Measurement Unit has three components: Anti-aliasing filters, Analog-to-Digital Converter and Phasor measurement Unit/ Processor. An anti-aliasing filter ensures that all the analog signals have the same phase shift and attenuation thus assuring that the phase angle differences and relative magnitudes of the different signals are unchanged. Anti-aliasing filters made up of an analog front end and a digital decimation filter are far more stable as far as aging and temperature variations are concerned. IEEE C37.118 standard stipulates that it is mandatory to use the filter for avoiding any aliasing errors. Out of various analog filters, the Butterworth has been preferred due to its flat response in pass-band as compared to other filters. In this work, it is attempted to design anti-aliasing filters to be used in PMUs. The design problem is formulated as an optimization task that is solved using the Taguchi method. The results show better performance in terms characteristics compared to the conventional filters. The designed filters may be employed as building blocks in modern PMUs.
MEKANISME PERTANGGUNGJAWABAN BADAN USAHA MILIK DESA MENURUT PERMENDES PDTT NOMOR 4 TAHUN 2015 TENTANG PENDIRIAN, PENGURUSAN DAN PENGELOLAAN DAN PEMBUBARAN BUM DESA
Authors: Hutagalung Aldyan , Rajagukguk Mori , Siregar Hisar
Published: February 2021

This research aims to find out how the management system of village-owned companies. Where this article refers to several rules and legislation governing the village belonging to the company. Establishment of village owned enterprises is a container that can be one of the real income sources of the coveted village can encourage the village economy to better. This business entity has a legal basis as a reference and the foundation in the implementation of its activities to run as close as possible. In the case of this writing the author uses a juridical normative research method. This approach uses approach to legislation and conceptual approach. The mechanism of accountability in conducting and carrying out the village's business activities, which is to provide a report of accountability for the implementation of the village's business activities for advisors, the village's Consultative institution is Supervisors who supervise the activities or performance of village governments, village governments must give accountability for their duties as contractors of the village-owned company to the Consultative Village agency that is submitted during village consultation.
Ketimpangan Distribusi Pendapatan Antarwilayah Di Provinsi Sumatera Utara Tahun 2001-2016
Authors: Purba Elvis , Siregar Ayu Handayani
Published: February 2021

This paper decribes how the inequality of income distribution in the Province of North Sumatra Province is based on analysis interregional, namely the West Coast, Nias Islands, the Highlands, and the East Coast. The data analyzed is the Gini coefficient published by BPS North Sumatra Province from 2001 to 2016. Based on the distribution criteria of income from the Gini coefficient, there are three qualitative measures of inequality, viz: (1) relatively evenly distributed (very low inequality), (2) moderate inequality, (3) very high inequality. The results of data analysis show that: (1) there is no one regency or city whose income distribution is classified aa very high inequality, (2) all of regencies and cities in the highlands show a very low inequality, (3) in general, the distribution of income in regencies and cities in the West Coast, Nias Islands and the East Coast is relatively evenly distributed, (4) there is no clear pattern or fully unidirectional correlation between high economic growth rates and an increasingly unequal distribution of income in each regency or city. Very low inequality can also occur in regencies or cities whose economic growth rate are higher than the provincial economic growth rate. Vice versa, there are regencies or cities that have economic growth rates are lower than the provinces but instead show a moderate inequality.
FUNGSI DEWAN PERWAKILAN RAKYAT DAERAH SEBAGAI UNSUR PENYELENGGARA PEMERINTAH DAERAH BERDASARKAN UNDANG – UNDANG NOMOR 23 TAHUN 2014 TENTANG PEMERINTAHAN DAERAH
Authors: Tampubolon Elita , Sitanggang Ranap , Siallagan Haposan
Published: February 2021

Regional people's representatives council or abbreviated as DPRD is a representative positioned as an element of provincial/regencial administration in Indonesia.This council is directly elected by the society as the representation to take part in government implementation. the problems caused among the society are not the measurement that DPRD not organize its funtions but this is to help DPRD as the representative of society in administrating the local government.
Prva svetovna vojna in Slovenci: 1994–2014
Authors: Svoljšak Petra
Published: February 2021

WORLD WAR I AND SLOVENIANS: 1994–2014The paper examines the Slovenian historiographic production about the topic of World War I from 1994 to 2014 and represents a continuation of a commented bibliography, which encompassed the period from 1918 to 1993. The time between 1994 and 2014 was characterised by enormous production and a shift of the contents from the »Yugoslav« themes, which had tailored the statehood remembrance after World War I; the decline of the World War I themes as the focus shifted to the historiographic examination of World War II; and the very diversified research in the last period. The central theme of the historical writings is the Soča/Isonzo Front, but not merely as a military process: the focus shifted on the level of the soldiers’ experience, gender studies, the role of the Church, fatalities among soldiers, and remembrance of World War I. All of these issues have been subjected to historical research as well.
Revolution by the law: Transformation of the Czechoslovak Federal Assembly 1989–1990
Authors: Roubal Petr
Published: February 2021

This study looks at the role of the Federal Assembly in the Velvet Revolution. With the disintegration of the communist party, the Federal Assembly became unexpectedly a key constitutional institution with far reaching powers in times of rapid political change. The revolutionary movement Civic Forum forced through a legislation that enabled to recall substantial part of the members of the parliament and replace them by its own candidates through co-optation. This method of “cleansing” of the parliament had far-reaching consequences for the post-November Czechoslovak political culture.
Changing Dynamics of Democratic Parliamentary Arena in Slovenia: Voters, Parties, Elections
Authors: Kustec Lipicer Simona , Henjak Andrija
Published: February 2021

The main goal of this paper is to provide a descriptive analytical overview of the existing evolution of the Slovenian parliamentary arena since its transition to democracy and independence. The paper is divided into two main parts: (1) an overview of a normative insight into the parliamentary and party system, and (2) an analytical assessment of the structure of the parliamentary arena as it is reflected in electoral and parties’ choices and policy preferences. A look at the contemporary democratic parliamentary arena in Slovenia shows that it, in itself, has been quite stable, while, on the contrary, its main integral parts – political parties – have gradually become less stable and less predictable, especially in the second decade of democracy, which can potentially influence the future stability of parliamentary arena, too.
Španska državljanska vojna v kontekstu slovenskih in jugoslovanskih razmer med svetovnima vojnama
Authors: Repe Božo
Published: February 2021

SPANISH CIVIL WAR IN THE CONTEXT OF THE SLOVENIAN AND YUGOSLAV CIRCUMSTANCES BETWEEN BOTH WORLD WARSThe author describes the division of the Slovenian society in the 1930s concerning the Spanish Civil War. Slovenian history was marked by various ideological schisms – from Christianisation and anti-Reformation in the 16thcentury to the longest lasting ideological-religious schism of the 20thcentury, which had begun at the end of the 19thcentury, in the time when political parties had been formed. At that time the Catholic camp, under the influence of Dr. Anton Mahnič, wanted to organise the public life in the Slovenian provinces according to the principles of extreme Catholicism. The polarisation continued during the interwar period, especially in the 1930s, where we should search for the roots of the wartime fratricidal conflict. Slovenians are still divided along these lines, and the schism surfaces at every possible occasion, for example during elections or celebrations. We are burdened by it to the point where it actually prevents us from becoming a modern nation or at least hinders the process of its formation. The assessment of the Spanish Civil War, even more than 70 years thereafter, still remains essentially controversial, just as it was back then. This holds true for the Slovenian as well as for the European (nowadays mostly conservative) society.
Gospodarski in družbeni nazori v slovenskem naprednem taboru, 1930–35: I. del – velika gospodarska kriza
Authors: Mulej Oskar
Published: February 2021

ECONOMIC AND SOCIAL VIEWS IN THE SLOVENE PROGRESSIVE CAMP, 1930–35. Part I. – The Great DepressionThe following article focuses on the economic and social orientations, ideas and concrete policies that were present, being developed and implemented within the Slovene progressive camp during the first half of the 1930s. Primarily it focuses on the time after 1931, when the progressives as part of the Yugoslav National Party steered the Yugoslav politics and represented the political authority in Slovenia. This article – the first part of the study – provides a detailed analysis of the global economic crisis as the factor that had the most profound impact on the period under consideration and which all the political actors had to face, respond to, and address by employing the major part of their efforts. The Slovene progressives understood the Great Depression as a serious blow to the global economy, while at the same time they also saw this crisis as a harbinger of the potential radical political changes. In this regard they argued for a more conservative approach to the fiscal policy as well as defended the principles of free trade, for they viewed the economic protectionism as one of the major causes of the deepening crisis. At the same time the gradual change in the political-economic paradigm, calling for a more prominent role of the state in the economy and reflected through the changed rhetoric and discourse of the Slovene progressives , was already becoming more apparent in the years between 1933 and 1935.
"Psi s cvetlicami": slovenski vojaki in vojna s slovanskimi nasprotniki v slovenskem političnem časopisju 1914–1916
Authors: Perovšek Jurij
Published: February 2021

»DOGS WITH FLOWERS«: SLOVENIAN SOLDIERS AND WAR WITH SLAVIC OPPONENTS IN SLOVENIAN POLITICAL NEWSPAPERS 1914–1916For a vast majority of Slovenians and Slovenian soldiers there was no doubt that the Slavic opponents of the Monarchy were, due to their undisputed Austrian patriotism, nothing but enemies to the Monarchy. In the period from 1914 to 1916, such sentiments were encouraged by two Slovenian political daily newspapers, i.e. Slovenec and Slovenski narod, whose attitude allowed no ideas about interaction between Slovenians and the other Slavic nations. Regarding the issue of Slavic identity, they found the front lines which ran between Austria-Hungary and Germany on the one side and Slavic countries fighting them on the other to be the deciding factor. Despite some articles in which no harsh words were shared concerning Slavic opponents, the path to considering the mutual Slavic identity was decisively closed at both newspapers. There were only the Austrian sense of self-worth and its narrow attitude towards the Slavic identity and culture. Both Slovenec and Slovenski narod significantly consolidated the position that Slovenians – just like other Slavs in the Habsburg Monarchy – were Austrians, and those who did not feel the same came from a different planet. This attitude was the result of the war, which made Slavic affiliation inferior to the interests of countries fighting in it.
Determinants of Microfinance Factors Affecting Women’s Empowerment: Evidence from Egypt
Authors:   Azzaytuna University, Libya, Irhoumah Ali , Ayedh Abdullah
Published: February 2021

There have been many proposals made and implemented worldwide by both the public and private sectors to alleviate the hardships of the poor women, and in the long term enhance their empowerment. Subsequently, this would allow women to play a significant social and economic role in modern societies. The current research has been motivated by the need to close the knowledge gap by assessing the determinants of microfinance, as well as the factors affecting women‘s empowerment in Egypt, in terms of increased savings and real income and choice, as well as participation in decision making, social relations, consumption and household welfare. This study applied quantitative tools and examined a random sample of 423 women participants with a microfinance agency in Egypt. Particularly, a survey was conducted on the key impact of institutional factors, cognitive effects and cultural factors on women's empowerment. Data were inspected and then analysed using structural equation modelling (SEM), to determine the statistical significance and differences. The findings showed that women using microfinance were able to raise their own standard of living as well as that of their families, thus indicating the positive impact of microfinance. This finding could be useful for policy makers and microfinance institutions and other stakeholders in Egypt