bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of the symmetry of 3D silicon melts flow generated by a bitter traveling magnetic field in a cylindrical crucible
Authors: Hiba B. , Nouri Ab. , Hachani L. , Zaidat K.
Published: July 2024

Full 3D numerical simulation and experimental characterization of the topology and sensitivity of a magnetohydrodynamic flow pattern driven by a travelling magnetic field generated by a specifically designed cylindrical Bitter coil have been carried out. This Bitter coil has six windings composed of multiple circular copper plates and insulator separators disposed in a specific way for an optimum round circulation of electric currents, which are three-phase currents at a network frequency. For experimental characterization, experimental measurement data of radial components of the induced magnetic field (Br) at different z-positions were used without any liquid metal for different applied electric currents, and ultrasound Doppler velocimetry was employed to acquire the vertical velocity component along the beam axis in the centre and at different azimuthal positions for a fixed radial coordinate in the liquid GaInSn alloy. On the other hand, for numerical characterization, a numerical model has been developed using the Comsol MultiphysicsTM software to resolve the set of magnetohydrodynamic equations, fundamentally based on low frequency and low magnetic induction, and on an averaged expression of the Lorentz force. The results clearly show that the choice of 3D modelling and the Bitter coil design, which generates instabilities, can change significantly the usually expected axisymmetric torus-type magnetohydrodynamic flow topology and result in a distinct 3D flow configuration. Figs 8, Refs 16.
Numerical and theoretical framework for the DRESDYN precession dynamo experiment
Authors: Pizzi F. , Giesecke A. , Šimkanin J. , Kumar V. , Gundrum T. , Stefani F.
Published: July 2024

The upcoming DRESDYN (DREsden Sodium facility for DYNnamo and thermohydraulic studies) precession experiment will test the possibility to achieve magnetohydrodynamic dynamo action solely driven by precession. Here, after the description of the experimental facility, we present the results from direct numerical simulations with the aim to understand the flow behavior and its dynamo capability. The main conclusion is that in the nonlinear regime the nutation angle is an essential governing parameter which determines the flow structures and the possibility of dynamo action. We obtain clear indications about the optimum configuration for the future experimental runs. Figs 5, Refs 17.
Near-wall MHD turbulence: investigation of a spanwise magnet array configuration
Authors: Capogna A. , Doche O. , Davoust L.
Published: July 2024

Direct numerical simulations of turbulent channel flows subjected to non-uniform magnetic fields are presented. The magnetic fields are delivered by spanwise distributions of permanent magnets located on the top and bottom walls of the channel. This configuration generates mainly magnetic field components perpendicular and transverse to the wall. Three different values of magnet thickness are considered. For each calculation, the average magnetic intensity imposed in a selective part (\it{i.e.} the turbulent inner layer) of the channel is kept constant so that the only parameter studied is the shape of the magnetic field. We show that larger magnets tend to create more homogeneous magnetic distributions in the near-wall region and lead to a better reduction in turbulent activity in this region. Figs 10, Refs 4.
Large eddy simulation of magnetohydrodynamic turbulent flow in an electrically conducting circular pipe with V-shaped strips
Authors: Mao Jie , Meng Fanzhen , Xu Chao
Published: July 2024

Pressure drops and velocity distributions of liquid metal MHD flow in pipes are closely related to the geometry of the cross-section. Liquid metal flows in two types of electrically conducting circular pipes under a uniform magnetic field applied transversely to the flow are investigated numerically using large eddy simulation with a coherent structure model developed in the OpenFOAM environment. One pipe has a typical circular cross-section (N-pipe), whereas the other has four V-shaped strips at the wall parallel and perpendicular to the magnetic field (F-pipe). The increasing transverse magnetic field causes a turbulent MHD flow evolves into a single-sided turbulent flow and a laminar flow in the N-pipe. The V-shaped strips on the Hartmann wall generate a low-velocity belt along the magnetic field direction in the center of the pipe and weak high-velocity jets near the V-shaped strips. Furthermore, the inflection points in the velocity profile improve instability and turbulence. The root mean square of the velocity fluctuation, in particular, the transverse components increase with the Hartmann number increasing along the magnetic field direction in the F-pipe. The V-shaped strips delay the MHD turbulent-laminar transition. However, the skin friction coefficient is slightly higher in the F-pipe than in the N-pipe, with the same dimensionless parameters. The research results can be applied to the turbulence promoter in the MHD pipe flow. Key words: Magnetohydrodynamic turbulent flow, large eddy simulation, pipe, V-shaped strips. Tables 5, Figs 9, Refs 23.
Supplementary material for CFD simulation of copper magnetoelectrolysis cell in the presence of parallel and antiparallel Lorentz forces
Authors: Najminoori M. , Mohebbi A.
Published: July 2024

Supplementary material note. Ion parameters and approximate calculation of the terms of Eq. (7) (Table S-1). Contour plots of the velocity field during copper magnetoelectrolysis for the parallel case at (a) t = 10 s and (b) t = 20 s (Fig. S-1). Contour plots of the concentration variation ∆c during copper magnetoelectrolysis for the parallel case at (a) t = 10 s and (b) t = 20 s (Fig. S-2). Profiles of the vertical velocity component for 2 mA at different heights from the bottom of the cell in the parallel case at (a) t = 10 s and (b) t = 20 s (Fig. S-3). Concentration variation ∆c near the cathode for 2 mA at different heights from the bottom of the cell in the parallel case at (a) t = 10 s and (b) t = 20 s (Fig. S-4). Vertical concentration variation profiles parallel to the electrodes at different distances from the cathode in the parallel case at (a) t = 10 s and (b) t = 20 s (Fig. S-5). Contour plot of the velocity field during copper magnetoelectrolysis in the antiparallel case at t = 10 s (Fig. S-6). Contour plot of the concentration variation ∆c during copper magnetoelectrolysis for the antiparallel case at t = 10 s (Fig. S-7). Profile of the vertical velocity component for the electric current 2 mA at different heights from the bottom of the cell for the antiparallel case at t = 10 s (Fig. S-8). Concentration variation ∆c near the cathode for the electric current 2 mA at different heights from the bottom of the cell for the antiparallel case at t = 10 s (Fig. S-9). Vertical concentration variation profile parallel to the electrodes at different distances from the cathode for the antiparallel case at t = 10 s (Fig. S-10). Tables 1, Figs 10.
Numerical study on hydraulic loss characteristics of seawater MHD thruster under electromagnetic field
Authors: Chen Xiaoqiang , Zhao Lingzhi , Wang Feng , Peng Aiwu
Published: July 2024

Under the action of an external electromagnetic field, the velocity distribution of seawater in the MHD thruster channel changes significantly compared with the distribution without an electromagnetic field, which will affect the original hydraulic loss characteristics of the channel. Based on Fluent numerical simulation, the distribution characteristics and generation mechanism of flow in the MHD thruster are analyzed first and then the effects of current density, channel structure, and inlet Reynolds number on the channel flow field distribution and hydraulic loss characteristics are further studied. The results show that (i) the M-type velocity distribution also appears in the channel of the seawater MHD thruster, but due to the low conductivity of seawater, its source is different from the traditional Hartmann effect, which is mainly caused by the combined action of the external electromagnetic field. (ii) There will be an additional hydraulic loss in the thruster channel under the action of the electromagnetic field. With the increase of the interaction coefficient N (the ratio of electromagnetic force to inertial force), the hydraulic loss coefficient ratio ξ/ξ0 of the channel monotonically increases. (iii) When the thruster operates at a high interaction coefficient (N > 1), the additional hydraulic loss caused by the electromagnetic field in the channel cannot be ignored. Key words: Seawater MHD thruster, linear channel, hydraulic loss, interaction coefficient, numerical simulation. Tables 1, Figs 21, Refs 15.
Numerical study on end effect of the seawater MHD thruster in a linear channel
Authors: Chen Xiaoqiang , Zhao Lingzhi , Wang Feng , Peng Aiwu
Published: July 2024

The end effect of the MHD thruster refers to the phenomenon of seawater flowing under the end magnetic field and the end electric field of the thruster channel and its influence on propulsion performance. Starting from the thruster power balance equation and the end effect mechanism, this paper defines five dimensionless parameters: the Joule heat power coefficient, the electromagnetic power coefficient, the leakage current coefficient, the electromagnetic force coefficient, and the electromagnetic efficiency coefficient to characterize and quantify the end effect of the MHD thruster. Based on Ansys Fluent 3D numerical simulation, the influence of applied voltage, flow rate and channel structure on the end effect was studied, and the influencing factors and variation rules of the end effect were obtained. The research methods applied and research results obtained in this study can provide guidance and be a basis for the optimal design of high-performance linear channel MHD thrusters. Key words: Seawater MHD thruster, linear channel, end effect, numerical simulation. Tables 2, Figs 13, Refs 13.
Assessing and Modelling Domestic Water Consumption Behavior
Authors: Raja Ahmad Raja Adzrin , Samsudin Syamsyul , Azmi Nurul Azlin , Md Yatim Nurul Huda
Published: July 2024

The UNICEF predicts severe water shortages and water scarcity worldwide. According to a water resources study conducted from 2000 to 2050, Malaysia is susceptible to potential water shortages in specific regions. These projections emphasized the importance of sustainable water management practices and proactive measures to mitigate potential water scarcity. It becomes crucial for Malaysia to implement effective strategies to address this issue. Therefore, this study aims to identify factors that influence sustainable water consumption behavior (SWCB) and establish a model for understanding consumer behavior in consuming water for domestic usage. Using the prominent theory of planned behavior (TPB) and reviewing the prior literature, this paper proposes a model to assess SWCB to understand consumer behavior on the water. This study found that attitudinal predictors significantly influence the SWCB. These predictors influence consumers’ motivation, engagement, and views that may influence water intention and consumption behavior. Then, consumer intention mediates the relationship between attitudinal predictors and SWCB as it will evaluate consumers’ favorable and unfavorable actions. Moreover, the model also found that socio-demographic traits (gender, household size, and income level) influence SWCB. These factors are the critical variables that significantly influence the SWCB. This paper contributes to policy implementation by modelling SWCB to help policymakers and urban planners develop effective policies and strategies to address water management challenges. By considering the drivers and barriers to sustainable behavior, policymakers can design targeted interventions, provide incentives, and implement regulations that promote water conservation at the household level.
Exploring How Sustainability Development Goals (SDGs) Influence Market Returns for Malaysian Listed Firms
Authors: Mohd Razali Mohd Waliuddin , Abdul Rahim Siti Masyitah , Jambol Dg Junaidah Awang , Hassan NurulAsyikin , Ab Majid Rozaiha
Published: July 2024

The significance of SDGs lies in their ability to offer a comprehensive structure for tackling worldwide issues and advancing sustainable development in the realms of economy, society, and the environment. This study aims to investigate the relationship between SDGs and market returns. The final data sample of 74 firms was collected from the firm website and Eikon database from 2021-2022. The research reveals that although SDGs and market returns have no statistically significant relationship, a positive impact indicates potential appeal to investors. Moreover, adhering to SDGs demonstrates social responsibility and can yield regulatory advantages, potentially shaping frameworks and offering investors a sense of assurance in the face of environmental apprehensions. Conducting comparative studies in various geographical and market contexts, as well as longitudinal studies that monitor SDG initiatives and market returns, has the potential to deepen our comprehension of how regional disparities and economic cycles impact the connection between SDGs and market performance. Additionally, examining sector-specific intricacies may reveal industry-specific obstacles and prospects in aligning with SDGs to enhance financial performance.
Portable X/g-ray survey meter based on the internet of things network for measuring the environmental radiation distribution
Authors: Xiao Simin , Li Xinglong , Liu Yang , Luo Zhiping , Pang Hongchao , Wu Jianhua , Huang Xiaopeng
Published: July 2024

Real-time detection of X/gamma radiation dose rates holds particular
significance in nuclear science research. In this study, we developed
a portable X/gamma-ray survey meter for large-scale distributed
real-time monitoring of ambient dose equivalent rates in the surrounding environment. This innovative device uses a silicon photomultiplier
coupled with a CsI(Tl) scintillator and can connect to an Internet of Things
network. Additionally, it facilitates a wide spectrum of dose rate
measurements by modifying the frequency of a pulse-frequency
modulation-type DC-DC power supply mode. The energy response of the survey
meter, which is improved through Geant4 simulations and a multi-comparator
design, ranges from 48 keV to 1.3 MeV, encompassing various common
protection level applications. It effectively measures gamma radiation
dose rates ranging between 0.1 mSvh-1 and 100 mSvh-1 for 60Co. Temperature
compensation of the detector was achieved through a series of experiments.
The meter exhibits a deviation of -25 % to +25 % at temperatures between -40?C and +40?C.
Evaluating the Challenges Encountered in the White Goods Industry in the Adaptation Process to Industry 4.0 via a Hybrid MCDM Model
Authors: Akman Gulsen , Boyacı Ali İhsan
Published: July 2024

The aim of this study to define and analyze the difficulties for the adoption of I4.0 in the white goods sector in Turkey. Firstly, difficulties of I4.0 adoption are determined and finalized by examining the literature. Then a hybrid MCDM approach consisting of the Fuzzy Decision Making Trial and Evaluation Laboratory (F-DEMATEL) method, the Maximum Mean De-Entropy (MMDE) technique, the interpretive structural modelling (ISM) technique and MICMAC analysis is used to evaluate relationships and interactions between difficulties. Findings show that “Lack of technological infrastructure and networks powered by the internet” and “Lack of integration of data and technology platforms” are the difficulties that have the strongest driving power, and they have direct or indirect effects on other difficulties. These are the main difficulties for Industry 4.0 adoption in white good production industry. On the other hand, “Ineffective communication and cooperation amongst supply chain participants” is found out the most affected difficulty directly or indirectly from other difficulties.
Średniowieczna nazwa kulturowa SIECZCZA < *SIEKCZA
Authors: Gałecki Zygmunt
Published: July 2024

W artykule zaprezentowano wyniki analizy językoznawczej dokonanej dla nazwy miejscowej Sieczcza. W średniowieczu określano nią wieś, na gruntach której w drugiej ćwierci XVI w. lokowano miasto Parysów na południowym Mazowszu. Zakwestionowano zasadność interpretacji funkcjonujących dotąd w dyskusji naukowej, zgodnie z którymi pochodzenie tego toponimu jest dzierżawcze i wykazano jego kulturową genezę oraz związki semantyczne z polskimi nazwami typu Osiek, Osieck i ukraińską Siczą, jako wywodzącymi się od ogólnosłowiańskiego czasownika siec, siekać.
Kultura jedzenia i dieta bazylianów prowincji litewskiej w drugiej połowie XVIII wieku
Authors: Laužikas Rimvydas , Pavlyshyn Andriy , Kažuro Ina
Published: July 2024

Artykuł ma na celu przybliżenie zwyczajów żywieniowych i diety bazylianów z klasztoru Świętej Trójcy w Wilnie w drugiej połowie XVIII w., należącego do prowincji litewskiej tego zakonu. Ustalono, jakie reguły określały te zwyczaje i w jakim stopniu były one przez mnichów przestrzegane, z jakich artykułów spożywczych składał się jadłospis wspólnoty i jakie były źródła pozyskiwania produktów. Porównanie z lwowskim klasztorem bazylianów, reprezentującym prowincję Koronną (Ruską) zakonu, pozwala lepiej zrozumieć specyfikę kultury jedzenia bazylianów. O jej swoistości w znacznej mierze przesądziła rezygnacja ze starożytnej monastycznej tradycji niespożywania mięsa. Inne cechy zostały zdeterminowane przez monastycyzm potrydencki i ówczesne czynniki społeczno-ekonomiczne społeczeństwa.
Inwentarz lubelskiej księgarni Józefa Gostomskiego z pierwszej połowy XVIII wieku
Authors: Juda Maria
Published: July 2024

Celem artykułu jest zaprezentowanie wyników analizy inwentarza księgarni Józefa Gostomskiego pod względem metody sporządzenia i tematyki wykazanych w nim książek. Dokument przygotowano w związku z przekazaniem lub sprzedażą księgarni nowemu właścicielowi. Zarejestrowano w nim 518 książek w 3523 egzemplarzach, będących wytworami krajowych i zagranicznych drukarni. Analiza metody opracowania inwentarza i jego zawartości pozwoliła na ukazanie zasobu księgarni, dróg i sposobów pozyskiwania książek oraz ich wartości. Zaś analiza treściowa wskazała na zainteresowania czytelnicze potencjalnych klientów księgarni, które zorientowane były na różnego rodzaju piśmiennictwo religijne, literaturę piękną i popularną, pomoce dydaktyczne i w znacznie mniejszym stopniu na dzieła z innych dziedzin wiedzy.
František Kolář, Jana Koudelová, Petra Kaniová, Romana Rosová, Dalibor Prix, Pavel Stabrava, Michal Zezula, Život uvnitř města. Typologie zástavby a kultura bydlení v městských historických jádrech moravskoslezského pomezí
Authors: Czechowicz Bogusław
Published: July 2024

Recenzja
Kościoły i klasztory rzymskokatolickie na terenie dawnego województwa bełskiego
Authors: Sobczyńska-Szczepańska Mirosława
Published: July 2024

Recenzja
Jan Klemens Branicki — splendor i miraż
Authors: Kalinowski Emil
Published: July 2024

Recenzja
Łukasz Kadela, Interpretacja estetyki dzieł architektury w procesie ich ochrony na przy kładzie Krakowa, t. 1, Lata 1945–1970
Authors: Getka-Kenig Mikołaj
Published: July 2024

Recenzja
Intravenous Injection of Serratia marcescens Nuclease in Mice Induced Elevation of Synthetized and Secreted into the Serum Extracellular Ribonucleases
Authors: MN Filimonova , AG Malanyeva
Published: July 2024

Deoxyribonucleases and ribonucleases are interest as potential anticancer compounds. Along with mammalian DNases and RNases the cancer suppressive effect was demonstrated for expressing the both activities nuclease from bacterium Serratia marcescens. The aim of the study was to examine how the appearing small amount of S.marcescens nuclease in blood can influence the level of serum DNase and RNase activities. Intravenous injection of S. marcescens nuclease in mice at the dose of 0.5µg /g of mouse was found to induce intensive rising RNA degrading activities in the serum. The induced activities differed from S.marcescens nuclease by the products of RNA degradation and requirement of magnesium cations. S.marcescens nuclease at the dose of 0.5µg /g of mouse did not both induce acute adverse effects and influenced on physical appearance and behavior in mice that evidenced a lack of the nuclease toxicity in vivo.
A Review of Rift Valley Fever: Its Epidemiology and Economic Impact on Livestock
Authors: F Tariku , T Rebuma
Published: July 2024

Rift Valley fever is a significant zoonotic disease transmitted by mosquitoes, affecting domestic ruminants and occasionally humans, with substantial economic implications. This review highlights the epidemiology and economic impacts of RVF, emphasizing its emergence beyond traditional endemic regions, notably in recent outbreaks across Africa and the Middle East. RVF outbreaks are closely linked to climatic factors such as heavy rainfall and flooding, facilitating mosquito vector proliferation. While primarily transmitted by mosquitoes, the virus exhibits a complex multispecies epidemiology involving various hosts and vectors. The diversity of host and vector species present, as well as climate change, has resulted in outbreaks in previously unreported areas. However, in Ethiopia, the occurrence of the disease was reported, but clinical Rift Valley fever has never been detected or reported yet. Outbreaks lead to livestock market closures, trade restrictions, and substantial economic losses, particularly in countries heavily reliant on livestock trade. Vaccination, vector control, and movement restrictions are crucial for disease prevention and control. Understanding RVF's complex epidemiology and implementing effective surveillance and control measures are essential for mitigating its impact on both livestock and human populations. Collaboration between endemic countries and their trading partners is vital for managing the disease and ensuring food security.
Growth and Yield of Celery (Apium Graveolens L.) in Organic Cultivation on Alluvial Soil
Authors: Irianti Agnes Tutik Purwani , Rahayu Sri , Suyanto Agus , Ayen Rosalina Yuliana , Oktarianti Sherly
Published: July 2024

Celery (Apium graveolens L.) is a horticultural crop that is consumable and offers numerous health benefits. The purpose of this study was to ascertain how celery growth and yield cultivated on alluvial soil were affected by the interaction between liquid organic NPK fertilizer and chicken manure. The study utilized a field experiment that was designed completely randomized comprising two factors. The first factor was the dosage of chicken manure with three levels: C1: 50 g/pot, C2: 100 g/pot, and C3: 150 g/pot. The second factor was liquid organic NPK fertilizer with three levels: L1: 1%, L2: 2%, and L3: 3%. All treatment combinations were performed in triplicates. The results indicated that the interaction between chicken manure and liquid organic NPK fertilizer significantly affected the number of tillers and dry weight of celery yield. Chicken manure as a single factor significantly influenced the number of stems and tillers. Liquid organic NPK fertilizer as a single factor significantly influenced the number of tillers, fresh weight, dry weight, and plant height. The combination of chicken manure and liquid organic NPK fertilizer (C1L3) produced the highest number of stems per clump (79.44 stems) and the highest number of tillers per clump (9.78 tillers). The combination of C2L3 yielded the highest fresh weight (184 g) and dry weight (17.33 g). Keywords: Alluvial soil, Celery, Chicken manure, Liquid organic NPK fertilizer
Editorial
Authors: García Mogollón Javier Mauricio
Published: July 2024

Editorial
ESTRATEGIA DE CONOCIMIENTO CIENTÍFICO Y COMUNITARIO PARA CONSERVACIÓN DE LA DIVERSIDAD BIOLÓGICA EN EL SISTEMA LAGUNAR DE CARTAGENA DE INDIAS
Authors: Real Capacho Nazly Constanza , Parra Peñalosa Oscar José
Published: July 2024

La ubicación de la ciudad de Cartagena otorga particularidades biofísicas específicas, accediendo interiormente a sistemas lagunares conectados y en algunos recorridos tienden a estar encerrados de manglar, formado un sistema biodiverso que atraviesa la ciudad por el barrio Crespo llegando el barrio Manga cruzando por los barrios Marbella, Cabrero, Centro Histórico, Pie de la Popa y Bazurto. La ciudad se considera un corredor biológico conformando por seis masas de agua, conocidos como: caño de Juan Angola, Laguna del Cabrero, Launa de Chambacú, Laguna de San Lázaro, caño de Bazurto y la Ciénaga de las Quintas. La participación de estas comunidades no permitió conocer la percepción sobre la biodiversidad existente a sus alrededores, para comprender las relaciones negativas o positivas que pueden afectar los procesos de turismo y conservación de las especies. El objetivo de la presente investigación es construir una línea base de información de la biodiversidad aplicando conocimiento científico y comunitario en el sistema lagunar de Cartagena de Indias. La estrategia de investigación se  basó en el recorrido por el sistema lagunar, en compañía de investigadores, sabedores locales y comunidad en general, inicialmente se estudió la información en base científicas indagadas en CARDIQUE, Establecimiento público Ambiental (EPA), universidades a nivel nacional y a nivel local, artículos científicos, tesis de pregrado y postgrado, colecciones biológicas, páginas web y libros rojos, listas CITES, boletines periódicos, con el fin de generar una matriz de información biológica para el área de estudio y sus aledañas. Posteriormente se relaciona con la comunidad aplicando un aprendizaje colectivo que consiste en investigar mediante la acción participativa un conocimiento real sobre la biodiversidad de la zona, entendiéndolo como un conjunto de fauna, flora y cultura, orientado a la implementación del turismo científico. Como conclusión se generó una base de datos de diversidad biológica, validada por investigadores, sabedores locales y habitantes de la comunidad, alcanzando a identificar 94 especies entre aves, peces, reptiles, mamífero y mangles presentes en el sistema lagunar de Cartagena de Indias, departamento de Bolívar.
Desafíos en la enseñanza de ingeniería en el siglo XXI
Authors: Ramirez Hugo Ricardo
Published: July 2024

Los programas de ingeniería tienen un papel crucial que desempeñar para que la formación de los futuros ingenieros sea exitosa y se adapten a las necesidades de la sociedad del siglo XXI. A través de la revisión bibliográfica, el diálogo con actores de la academia, la industria y entes gubernamentales se identificaron unos tópicos fundamentales que los programas de ingeniería deben constantemente monitorear para adaptar sus currículos, métodos de enseñanza, procesos de admisión y retención de estudiantes. Dentro estos tópicos se destacan: los rápidos cambios en el mercado laboral, avances tecnológicos en educación y la creciente necesidad de diversidad e inclusión. Para hacer frente a estos retos, la enseñanza de la ingeniería debe ser más adaptable, receptiva e integradora, y centrarse en el desarrollo de las competencias más demandadas en el mercado laboral, un aprendizaje más práctico y basado en proyectos, enfoques interdisciplinarios, competencias interpersonales y elementos éticos y sociales
Desarrollo de un sistema multisensorial embebido para detección de fallas incipientes en transformadores eléctricos
Authors: Trujillo Barajas Emili Catherine , Gualdrón Guerrero Oscar Eduardo , Peláez Carrillo Diego Alfonso
Published: July 2024

El trabajo de investigación se basó en la elaboración de un sistema embebido capaz de detectar gases volátiles incipientes presentes en los transformadores eléctricos. Para realizar la detección de cada uno de los gases que allí se localizan, se aplicó ingeniería de detalle para la toma y adquisición de datos provenientes del sistema multisensorial, esto por medio de cada una de las pruebas que se debe aplicar a los sensores que se utilizaron para la toma de muestras, luego de haber realizado este tipo de ingeniería, se realizó un algoritmo para clasificar los datos adquiridos por medio del sistema multisensorial anteriormente planteado y esto con el fin de saber qué tipo de gas se detectó para la respectiva clasificación de los mismos, una vez logrado cada uno de los pasos anteriormente formulados se implementó un sistema inalámbrico capaz de dar la información interna que se está presentado en tiempo real en el transformador con el fin de hacer un  monitoreo constante para prevenir los daños futuros, y con esto implementar sistemas de mantenimiento bien sean preventivos o predictivos y así evitarle costos a la empresa encargada de dar manteniendo y buen funcionamiento a estos elementos de distribución eléctrica.
Comparación de modelos para el cálculo del dinagrama de fondo
Authors: Meneses Florez Jorge Enrique , Carreño Pérez Andrea Ximena , Pinto López Sebastián
Published: July 2024

La industria petrolera ha desarrollado el concepto de "pozo inteligente" para optimizar la producción y reducir el riesgo operacional a través de la automatización. En los sistemas de bombeo mecánico, es posible obtener en tiempo real el "dinagrama de fondo" para diagnosticar el sistema. Esto se logra utilizando los valores instantáneos de fuerza y posición medidos en la superficie y procesándolos mediante un modelo matemático llamado "ecuación de onda", que representa el comportamiento de la sarta de varillas que conecta el fondo con la superficie.  La precisión del dinagrama de fondo obtenido y, por lo tanto, la certeza de los diagnósticos realizados a partir de él, dependen del modelo de ecuación de onda utilizado.  En este artículo, se compara la efectividad de tres modelos matemáticos (Gibbs, Barreto Filho y Everitt) para la ecuación de onda y mediante su solución obtener el dinagrama de fondo en condiciones reales. El estudio se llevó a cabo utilizando Python en una plataforma PC, evaluando los resultados en términos de rendimiento computacional y precisión en la detección de fallas operacionales comunes.
Sistema tutor inteligente basado en la personalización del aprendizaje para la enseñanza de protocolos de atención en salud
Authors: Hanna Lavalle Monica Isabel , Gomez Salgado Adan Alberto , Marquez Garcia Laura Andrea
Published: July 2024

La personalización del aprendizaje es un proceso que organiza los contenidos del sistema considerando las características y desempeño de los usuarios utilizando Inteligencia Artificial. Este artículo presenta el diseño y evaluación de un Sistema Tutor Inteligente para la personalización del aprendizaje a través de estrategias pedagógicas basadas en Razonamiento Basado en Casos sobre protocolos de atención para sífilis gestacional y congénita. La metodología fue cuasiexperimental con dos grupos, experimental y control. La muestra estuvo conformada por 68 estudiantes. El grupo experimental utilizó el STI, mientras que el grupo control recibió la formación a través de clases magistrales. El grupo que utilizó el STI obtuvo un mejor logro de aprendizaje frente al otro grupo que aprendió tradicionalmente este tema. Estos resultados podrían sugerir que el uso de aplicaciones de este tipo, facilitaría la creación de nuevos escenarios que permitan un aprendizaje significativo considerando las características y necesidades de los estudiantes.
Desarrollo e implementación de unidad de monitoreo remoto para aplicaciones de protección catódica
Authors: Pinzón Gomez Sergio Andres , Acevedo Hernandez Guillermo Alexander , León Quiñonez Jhon Carlos , Granados Giraldo Maria Camila
Published: July 2024

Este documento presenta el desarrollo de un sistema de monitoreo remoto (SMR) para el seguimiento y control de unidades rectificadoras de protección catódica (URPC). Asimismo, se presentan las etapas de desarrollo desde su concepción, implementación, validación en laboratorio e implementación en ambiente industrial. Dicho sistema se basa en una red IoT compuesta por un equipo hardware encargado de adquirir las variables de entrada y salida de la operación de las URPCs, llamado Unidad de Monitoreo Remoto (UMR), transmisión de la data recolectada vía MQTT y una plataforma Web con servicio complementarios para la adquisición de la data y la gestión de los activos monitoreados.
Pengaruh Lingkungan Eksternal, Kompetensi Sumber Daya Manusia Dan Knowledge Management Terhadap Kinerja Organisasi Dengan Inovasi Sebagai Variabel Mediasi (Studi Pada UMKM di Kelurahan Pagerharjo, Kabupaten Kulon Progo)
Authors: Panuji Albertus , Ernawati Maria , Poerwanto Gregorius
Published: July 2024

This study aims to investigate the relationships between the external environment, human resource competencies, knowledge management, and organizational performance with innovation as a mediating variable. Data were collected through direct distribution of questionnaires to 60 respondents who are stakeholders of Kalurahan Pagerharjo, Kulon Progo Regency, registered under the Badan Usaha Milik Desa (BUMDes). The analysis method used was SEM-PLS. The study found that the external environment has a non-significant direct influence on organizational performance, but it significantly affects organizational performance when innovation is considered as a mediating variable. This might be due to the industry where the organization operates not being strongly influenced by external environmental factors. Human resource competencies have a significant direct influence on organizational performance, but their influence on organizational performance with innovation as a mediating variable is not significant. The research revealed that despite high levels of human resource competencies and innovation, they are not sufficient to enhance organizational performance. Knowledge management significantly influences organizational performance, both directly and with innovation as a mediating variable. These findings diverge from previous research and suggest that other factors may impact the external environment and organizational performance.
220KV HV Transmission Line from Deir Ammar to Deir Nbouh in Northern Lebanon
Authors: El Hassan Moustapha ,   Department of Electrical Engineering. University of Balamand, Kura. Lebanon, El Najjar Maged Badawi , Mustapha Osman , Daba Jihad
Published: July 2024

This paper provides a thorough analysis of the design, construction, and addition of a crucial 220-kV high-voltage transmission line that connects Deir-Ammar and Deir-Nbouh stations in northern Lebanon. The line effectively transports electricity over 11.1 kilometers, highlighting its essential function in the electrical grid. To guarantee reliability, dependability, and safety, the design takes environmental, landscape, and electrical load issues into account. High-strength materials and specialized equipment are used and proposed. In the end, the transmission line greatly improves electrical connectivity, supporting high-quality materials and environmentally sensitive design that increase grid stability, reliability, and energy accessibility. This infrastructure investment supports long-term energy needs and socioeconomic development in interconnected regions, benefits people, and businesses, and guarantees a consistent power supply. Results obtained through simulation closely align with the manual calculations and site visit measurements. Key words. Transmission lines, sag, horizontal tension, power flow.
New Technique to enhance Hybrid Renewable Energy Resources Operational Flexibility and Reliability
Authors: Masood Tariq ,   Department of Engineering. Frostburg, Maryland. USA, Abdo Jamil , Khan Abdul Jabbar ,   National Transmission & Dispatch Company, WAPDA, House Lahore. Pakistan
Published: July 2024

In this research four integrated strategies proposed and discussed for increasing the flexibility of hydropower operations. This initiative seeks to understand, enable, and improve the contribution of hydropower, including pumped storage hydropower (PSH) to reliability, resilience, and integration in the rapidly evolving U.S. electricity system. Hydropower’s flexibility is central to enhancing all these contributions. Four KFA (key focus areas) listed below to maintain and reliable operations. These KFAs will develop a suite of advancements that improve hydropower flexibility at multiple scales: improved components within the plant, improved hybridized capabilities at the plant interconnection, and improved operations across the fleet.[1],[2],[3] 1. HSE in Hydropower Hybrids 2. Reliable productivity 3. Technologies to Increase Flexibility 4. Operational Flexibility Key words. Novelty, Corrective Maintenance and Preventive maintenance and Intelligent module.
Evaluation of Constructive Parameters to Minimize the Effects of Solar Radiation in Households with Tropical Climate
Authors: Cárdenas J. ,   . Department of Electrical Engineering, Osma G. , Jaramillo J. ,   . Department of Electrical Engineering,   Department of Mechanical Engineering. Universidad Industrial de Santander     Bucaramanga, Colombia
Published: July 2024

In tropical climates, the energy consumption of buildings is strongly influenced by solar radiation. However, more research needs to be done on how specific design parameters can mitigate the effects of solar radiation in tropical homes. This study uses simulations in EnergyPlus to evaluate how orientation, roof solar absorptance, overhang depth, glass type, and wall type affect energy consumption in a typical middle-income home in a tropical climate. The results highlight the benefits of adequate solar absorbance and correct orientation. Incorporating insulation into exterior walls does not offer significant improvements in the energy performance of the building. Key words. Building energy simulation, Tropical climate, parametric analysis.
Control strategies applied to distribution networks with the integration of distributed energy resources - A review
Authors: Martínez-Peñaloza Alejandra ,   Escuela de Ingenierías Eléctrica, Electrónica y deTelecomunicaciones. Universidad Industrial de Santander. Bucaramanga. Colombia, Osma-Pinto German , Duarte César
Published: July 2024

The continuous integration of distributed energy resources (DERs) in power systems has opened the need to propose control strategies that tend to mitigate the possible impacts that an unlimited integration can produce. Authors have presented studies that present different control strategies that take advantage of the devices already present in the network or of new elements added, such as DERs. Also, different control architectures that can take full advantage of the capabilities that DERs can offer are studied. Therefore, this article focuses on reviewing the recent literature related to control strategies and architectures applied to distribution networks with DERs as protagonists. The control strategies that exploit the characteristics of DERs to perform control actions are described, and the control architectures adapted to the integration of DERs in distribution networks are detailed. Device modeling approaches are also mentioned, considering that some DERs depend on random variables and can introduce uncertainty in the analyses if their behavior is not modeled correctly. Finally, current and future trends in this area are discussed. Keywords. Control architectures, control strategies, deterministic approach, Distributed Energy Resources, stochastic approach.
Influence of environmental factors on corona voltage
Authors: Etxegarai A. ,   Department of Electrical Engineering. University of the Basque Country UPV/EHU Bilbao. Spain, De la Hoz M. , Fernandez E. , Aranzaba I. , Iturregi, A. , Mazón J.
Published: July 2024

The environmental conditions related to the air i.e. pressure, temperature, and humidity are relevant in the development of the corona effect in high voltage systems, affecting both corona onset voltage and the observed corona mode. This paper studies the influence of those environmental factors on the effective ionization coefficient and corona onset voltage, based on theoretical analysis, finite element modelling (FEM) and simulation results. Key words. Corona effect, FEM, high voltage, relative density, humidity.
Design of Protection Software Using Some Cryptosystems for Cloud Database Files
Authors: Jasim Khalid F. , Zeki Akram M
Published: July 2024

The security of cloud databases may be a basic concern for organizations as they store and manage expansive volumes of delicate information within the cloud. Cryptosystems played an essential part in securing information privacy and integrity in these situations. This paper gives an in-depth investigation of the utilization of cryptosystems for cloud database security. The paper starts by talking about the foundation and importance of cloud database security, highlighting the expanding requirement for strong information security measures. A comprehensive study reviewed and investigated the current state of research in this space, distinguishing key progressions and challenges. The paper at that point digs into the execution of cryptosystems in cloud databases, looking at their execution and trade-offs. Besides, rising patterns and advances for improving cloud database security, such as multi-factor confirmation, homomorphic encryption, and blockchain, are discussed. The paper moreover recognizes different inquiries about openings and future headings within the field, counting various encryption methods, execution optimization, key administration, convenience enhancements, compliance contemplations, and integration with rising advances. Furthermore, we proposed encryption software for file protection, the software designed based on symmetric and asymmetric cryptosystems. The proposed software can be adapted for file protection in cloud database security. In conclusion, the paper emphasizes the significance of cryptosystems for cloud database security and underscores the requirement for continuous inquiry about and collaboration to address challenges and drive development in this zone.
Knowledge and Awareness Towards Food Drug Interaction Among Pharmacists in Erbil City
Authors: Shahrokhisahneh Behnaz , Mahmoud Noor O. , Najmadin Rangin , Abdulwahab Ala H. , Hamasalh Sima S.
Published: July 2024

In the evolving landscape of healthcare, understanding the potential interactions between pharmaceutical drugs and food is imperative yet often overlooked. This study aimed to assess pharmacists' knowledge of food-drug interactions (FDI) in Erbil city, focusing on comprehension, risk factors, counseling practices, and familiarity with drug databases. Conducted through a survey-based approach, the research involved 100 pharmacists from varying educational backgrounds, sampled purposively from Doctors Street in Erbil. Data collection occurred over two months via a self-administered questionnaire comprising 34 questions covering basic FDI awareness and advanced topics. Results indicate a correlation between higher education levels and a deeper understanding of FDI, particularly in recognizing specific drug-nutrient interactions. Nonetheless, knowledge gaps persist, underscoring the complexity of FDI comprehension. Intriguingly, pharmacists with institute certificates exhibited nuanced understanding in certain scenarios, challenging assumptions about the linear relationship between education and awareness. The study emphasizes the necessity for targeted interventions in pharmaceutical education to address these nuances effectively. These findings contribute to the growing body of knowledge on FDI awareness among pharmacists, highlighting the importance of continuous education to ensure optimal patient care, treatment efficacy, and safety.
PENGARUH BABY SPA TERHADAP PERKEMBANGAN MOTORIK BAYI USIA 3-6 BULAN DI PRAKTEK MANDIRI BIDAN MAHANUM TAHUN 2021
Authors: R Maimunah , Ramadhani Yuni
Published: July 2024

ABSTRACTThe prevalence of growth and development disorders is the second highest after nutritional problems in infants. motor development of infants aged 3-6 years is a baby spa. This research is a quasi- experimental research with a pre-experimental design approach. The research was conducted at the Mahanum Midwife Independent Practice Medan. it is recommended to health workers at the Independent Practice of Midwives Mahanum Medan to develop promotions and education about baby spas to the public, especially parents of babies to improve motor development both gross and fine for babies. Keywords : Baby Spa, Motor Development, Babies Age 3-6 Months ABSTRAKPrevalensi gangguan tumbuh kembang tertinggi kedua setelah masalah gizi pada balira. Perkembangan motorik bayi usia 3-6 tahun adalah baby spa. Penelitian ini merupakan penelitian eksperimen semu dengan pendekatan pre-experimental desain. Penelitian dilakukan di Praktek Mandiri Bidan Mahanum. Disarankan kepada tenaga kesehatan di Praktek Mandiri Bidan Mahanum medan untuk mengembangkan promosi dan edukasi tentang baby spa kepada masyarakat khususnya orang tua bayi untuk meningkatkan perkembangan motorik baik kasar maupun halus pada bayi. Kata Kunci : Baby Spa, Perkembangan Motorik, Bayi Usia 3-6 Bulan
INOVASI PEMBUATAN BANDREK INSTAN DENGAN MEMANFAATKAN POTENSI TANAMAN HERBAL DI DESA DALU SEPULUH A KECAMATAN TANJUNG MORAWA
Authors: Putri Umi Muti'ah , Frasiska Rindi Ayu , Utama Widya , Fatimah Fatimah , Lubis Azwani
Published: July 2024

ABSTRACTIndonesia is a tropical country, this makes Indonesia rich in various plant species, including herbal plants such as lemongrass. Lemongrass with the Latin name Cymbopogon citratus thrives both in the highlands and lowlands. Lemongrass plants can be used in cooking spices, a mixture of essential oils and herbal drinks. There are still many people who use citronella conservatively, even though the use of lemongrass in a more modern way can provide more benefits and be able to reach a wider consumption market. Therefore, lemongrass processing innovation is needed in order to have high selling power, such as instant bandrek in powder form. This article aims to describe the manufacture of instant bandrek using lemongrass as the main herbal plant in Dalu Ten A Village, Tanjung Morawa. Keywords: Herbal Plants, Lemongrass, Instant Bandrek ABSTRAKIndonesia termasuk negara beriklim tropis, hal ini menjadikan Indonesia kaya akan aneka spesies tanaman tidak terkecuali tanaman herbal alam seperti serai. Serai dengan nama latin Cymbopogon citratus ini tumbuh subur baik pada dataran tinggi maupun rendah. Tanaman serai dapat digunakan dalam bumbu masakan, campuran essential oil maupun minuman herbal. Masih banyak masyarakat yang memanfaatkan serai wangi secara konservatif, padahal pemanfaatan serai secara lebih modern dapat memberi keuntungan lebih dan mampu menjangkau pasar konsumsi secara luas. Karena itu dibutuhkan inovasi pengolahan serai agar memiliki daya jual tinggi yaitu seperti bandrek instan dalam bentuk bubuk. Artikel ini bertujuan untuk mengemukakan pembuatan bandrek instan dengan memanfaatkan serai sebagai tanaman herbal utama di Desa Dalu Sepuluh A Tanjung Morawa.      Kata Kunci : Tanaman Herbal, Serai, Bandrek Instan