bluuebunny/crossref_metadata_2025 huggingface dataset:
Characteristics of Housing in Darkale Rural Settlement, Soma, Manisa
Authors: Etlacakuş Ayşen , Hamamcıoğlu Turan Mine
Published: March 2023

Darkale of Soma, Manisa is a historical rural settlement in Western Anatolia. The aim of this paper is to identify the characteristics of Darkale houses and to present a typology based on their authentic architectural characteristics. The method is evaluation of the housing units with the tools of the discipline of architectural conservation. The characteristics evaluated are the lot size and organization, unit-neighbor relations, storey system, spatial organization, construction technique, and material usage. The houses are representatives of the "Hayat house" typology that has been used for centuries in Anatolia. However, the presence of limited courtyards, possibility of houses composed of a single building mass, the partial carving of the units into the hillside, possibility of single storied units and the relation of housing with each other in all three dimensions, and streets continuing throughout the house masses in form of passages differentiate Darkale houses from the other Hayat houses. In addition, the continuing of the maintenance of housing units with traditional materials and techniques; weaving, cuisine tradition, winter food preparation such as pomegranate juice making, olive oil soap production and their storage, domestic fowl raising on the ground floor and courtyards of the houses are intangible qualities of Darkale. The major conservation problems of Darkale houses are abandonment, the functional transformation of spaces and usage of contemporary techniques and materials in the physical interventions.
Impact of central nervous system involvement in adult patients with Philadelphia-negative acute lymphoblastic leukemia: a GRAALL-2005 study
Authors: Orvain Corentin , Chantepie Sylvain , Thomas Xavier , Escofrre-Barbe Martine , Huguet Francoise , Desbrosses Yohan , Guillerm Gaelle , Uzunov Madalina , Leguay Thibaut , Barbieux Sarah , Vey Norbert , Chevallier Patrice , Malfuson Jean-Valere , Lepretre Stephane , Baumann Michael , Aykut Murat , Chaib Abdelaziz , Joris Magalie , Zerazhi Hacene , Stussi Georg , Chapiro Jacques , Berthon Celine , Bonmati Caroline , Jourdan Eric , Carp Diana , Marcais Amb roise , Gallego-Hernanz Maria-Pilar , Vaida Iona , Bilger Karin , Villate Alban , Pasquier Florence , Chalandon Yves , Maury Sebastien , Lheritier Veronique , Ifrah Norbert , Dombret Herve , Boissel Nicolas , Hunault-Berger. Mathilde
Published: March 2023

Whereas the prognosis of adult patients with Philadelphia-negative acute lymphoblastic leukemia (ALL) has greatly improved since the advent of pediatric-inspired regimens, the impact of initial central nervous system (CNS) involvement has not been formerly re-evaluated. We report here the outcome of patients with initial CNS involvement included in the pediatric-inspired prospective randomized GRAALL-2005 study. Between 2006 and 2014, 784 adult patients (aged 18-59 years) with newly diagnosed Philadelphia-negative ALL were included, of whom 55 (7%) had CNS involvement. In CNSpositive patients, overall survival was shorter (median 1.9 years vs. not reached, HR=1.8 [1.3-2.6], P<0.001). While there was no statistical difference in cumulative incidence of relapse between CNS+ and CNS- patients (HR=1.5 [0.9-2.5], P=0.11), non-relapse mortality was significantly higher in those with initial CNS disease (HR=2.1 [1.2-3.5], P=0.01). This increase in toxicity was mostly observed in patients randomized to the high-dose cyclophosphamide arm and in those who received allogeneic stem cell transplantation. Exploratory landmark analyses did not show any association between either cranial irradiation or allogeneic stem cell transplantation and outcome. Despite improved outcome in young adult ALL patients with pediatric-inspired protocols, CNS involvement is associated with a worse outcome mainly due to excess toxicity, without improved outcome with allogeneic SCT.
La evaluación y el turismo sostenible, caso de estudio Llangahua
Authors: Proaño Gómez Yadira Alexandra , Viteri Toro María Fernanda , Torres Oñate Camilo Francisco , Chisag Andachi Xiomara Abigail
Published: March 2023

Introducción. La presente investigación está enfocada en el centro de turismo Llangahua, el que se considera desde un manejo comunitario por desarrollar sus actividades en el área de páramo que colectivamente se conserva y que desde inicios del 2021 cuenta con afluencia de visitantes. Objetivo. Estructurar un modelo de gestión sostenible en base a la evaluación del centro de turismo Llangahua. Metodología. Es inductiva, de tipo básico, bajo un enfoque cualitativo, comprende un diseño descriptivo de investigación acción práctico, sustentado en un estudio bibliográfico – documental que es base para un estudio longitudinal, desarrollado con el planteamiento de tres etapas: un diagnóstico situacional; propuesta de un modelo de gestión; y, evaluación posterior a la intervención, estableciéndose un análisis entre el antes (evaluación 1) y después de la intervención (evaluación 2), utilizando tablas cruzadas y la triangulación hermenéutica. Resultados. El trabajo permite evidenciar que la evaluación de la administración da origen al modelo de gestión sostenible del centro de turismo Llangahua, donde se ha planteado la filosofía, orgánico estructural, estrategias, programas y acciones tácticas que incluyen sesenta y cuatro instrumentos. Conclusión. La evaluación fortalece la revisión de los logros de la administración del centro de turismo y permite la toma de decisiones para el mejoramiento y sostenibilidad del centro de turismo Llangahua.
El estrés académico y la educación en aulas virtuales en estudiantes universitarios
Authors: Salazar Padilla Emily Pamela , Cristina Ojeda Karen , Tabares Rosero Xiomara del Rocío , Morales Jaramillo María Belén
Published: March 2023

Introducción. En el transcurso de la vida estudiantil, los universitarios se han visto expuestos a varios cambios, en especial en estos últimos años donde la presión y la falta de adaptación a la educación virtual han desencadenado varias repercusiones dentro de su salud mental, principalmente relacionados al estrés, este afectando su desempeño académico. La educación virtual ha evidenciado debilidades como la falta de tiempo para el desarrollo de trabajo autónomo, la carencia de computadores actualizados e internet y la debilidad en la metodología y didáctica por parte de los docentes para el acceso y uso de ciertos recursos tecnológicos, plataformas, o el desarrollo de trabajos. Estos indicadores junto a la realidad de la pandemia COVID 19, ha incrementado de manera significativa los niveles de estrés en general y académico en particular. Objetivo. Analizar si el contexto académico virtual está generando estrés en los estudiantes universitarios. Metodología. Se aplica un enfoque mixto ya que buscamos analizar, describir la relación del estrés académico con la educación en aulas virtuales, un diseño descriptivo, una modalidad de campo y bibliográfica ya que la información fue recolectada de fuentes primarias. Resultados. Según los hallazgos los estudiantes presentan altos niveles de estrés asociado a las problemáticas que se presentan al usar las aulas virtuales. Conclusión. Existe relación entre el estrés académico y la educación en aulas virtuales, por lo cual es necesario la aplicación de estrategias de intervención que permitan la prevención y disminución del estrés académico en los estudiantes.
Estilos de crianza y su relación con el comportamiento prosocial en adolescentes
Authors: Pérez Paredes Nicole Bárbara , Rodríguez Pérez Mayra Lucía
Published: March 2023

Introducción. La manera en que los padres crían y educan a sus hijos o los estilos de crianza que emplean son determinantes para varias esferas de la vida, entre ello se encuentra la conducta prosocial que son las acciones que se realizan en beneficio de otras personas sin esperar retribución de ningún tipo. Objetivo. Identificar la relación de los estilos de crianza y el comportamiento prosocial en adolescentes. Metodología. La muestra estuvo conformada por 96 estudiantes pertenecientes a primero, segundo y tercero de bachillerato general unificado, de la provincia de Tungurahua-Ecuador, durante el año electivo 2021-2022, mediante un estudio de enfoque cuantitativo, de alcance descriptivo-correlacional y de corte transversal. Se utilizó el Cuestionario de Dimensión y Estilos de Crianza y la Escala original de Prosocialidad de Caprara. Resultados. Se determinó que el estilo de crianza que prevalece entre los adolescentes es el autoritativo, seguido del permisivo. Con respecto al comportamiento prosocial se encontró que predomina la conducta prosocial y posteriormente la empatía y apoyo emocional. Asimismo, se demostró que las mujeres presentan mayor tendencia prosocial en relación con los hombres, identificando diferencias significativas. Al mismo tiempo, se evidenció una correlación estadísticamente significativa entre estilos de crianza y comportamiento prosocial. Conclusión. Se concluyó que los estilos de crianza empleados por los cuidadores principales están relacionados con el comportamiento prosocial de los adolescentes, de manera que dentro de la familia se internalizan los valores y normas.
Estado psicológico y estrategias educativas en docentes universitarios: en tiempos de pandemia Covid-19
Authors: Guillermo Rosero Luis , Aldás Rovayo Víctor Daniel , Castro Dávila Willyams Rodrigo , Neto Chusín Héctor Manuel
Published: March 2023

Introducción: El Covid-19 trajo un sinnúmero de consecuencias en las diversas áreas de la actividad humana, una de ellas en la educación universitaria; este fenómeno fue analizado bajo la óptica de los distintos actores educativos; sin embargo, el estudio se refiere al estado psicológico y a las estrategias educativas desde la perspectiva de los docentes de cuatro universidades de la Sierra ecuatoriana. Objetivo: el propósito es identificar el estado psicológico y las estrategias educativas utilizadas por los docentes universitarios en tiempos de crisis sanitaria. Método: la investigación es de tipo descriptiva correlacional de enfoque cuanti-cualitativa; el instrumento utilizado fue un cuestionario de veinte y ocho ítems, la primera parte corresponde al test del estado psicológico de Kessler y la segunda es un cuestionario sobre las estrategias metodológicas de la autoría de los investigadores con un valor estadístico de 0,73 del coeficiente de Alfa de Cronbach,  aplicado a 70 docentes de las universidades: Técnica de Ambato, Central del Ecuador, Técnica de Cotopaxi, Estatal de Bolívar y Técnica del Norte. Resultados: los resultados muestran que el 61,76% de los profesores universitarios investigados padecen de malestar psicológico, entre ellos, el 33,82% se ubica en el rango (22-29 ptos.) de intensidad alta y el 27,94% en (30-50 ptos.) que equivale a una intensidad muy alta; por otro lado, el 65% de los docentes utilizan recursos convencionales clásicos para la enseñanza, y con respecto a la educación mediada por herramientas tecnológicas a veces contribuyen al logro de los objetivos de aprendizaje. Conclusión: se identificó que más de la mitad de los docentes universitarios presentan síntomas de malestar psicológico, además continúan con el uso de estrategias educativas similares a las de la educación presencial y, por tanto, según la percepción de los propios profesores no se están alcanzando los resultados de aprendizaje esperados.
Aprendizaje cooperativo y su influencia en las competencias digitales
Authors: Morocho Lara Héctor Daniel
Published: March 2023

Introducción. Las tecnologías de la información y comunicación son mediadores culturales hacia un nuevo enfoque de comunidad educativa. El influjo de las tecnologías de la información y comunicación en las actividades de la vida social y sobre todo en el quehacer educativo ha superado condicionamientos basados en el antiguo “profesor sabelotodo y teórico”. Objetivo.  Este artículo de investigación tiene como objetivo describir y analizar el aporte del aprendizaje cooperativo para el desarrollo de competencias digitales, mediante la utilización de herramientas digitales de la web a través de una serie de programas y talleres vinculados a la aplicación de la tecnología. Metodología. La metodología implementada es una investigación de tipo experimental, mediante un cuestionario estructurado de 40 preguntas en escala de Likert el cual fue validado mediante el estadístico alfa de Cronbach con un resultado de 0,871 en la cual se trabajó con una población comprendida en dos grupos intactos; grupo control y grupo experimental, cada uno conformado por 30 sujetos. El contraste de la hipótesis se realizó mediante a prueba estadística de U de Mann-Whitney donde se obtuvo un valor menor a 0,05, Resultados. por consiguiente, se obtuvo resultados favorables donde se afirma que el trabajo colaborativo aporta en el desarrollo de competencias digitales permitiendo un mayor desenvolvimiento de los individuos en actividades educativas diarias, Conclusión. Concluyendo pues que se garantiza un aprendizaje optimo y flexible dentro de un entono social, con ayuda y aplicación de las herramientas web 3.0.
Niveles de actividad física y obesidad por género en escolares de la ciudad de Ambato-Ecuador
Authors: Villalba Garzón Gabriela Alexandra , Moreta Criollo Blanca Rocío , Flores Robalino Rosita Gabriela , Castro Pantoja Edison Andrés
Published: March 2023

Introducción: La presente investigación fue realizada con la finalidad de determinar los niveles de actividad física y obesidad por género en estudiantes de la ciudad de Ambato-Ecuador. Objetivo. Identificar los niveles de actividad física y obesidad en estudiantes de la ciudad de Ambato-Ecuador. Metodología. La investigación es un enfoque cuantitativo del tipo de modelo básico aplicado por métodos no experimentales y diseño de campo transversal, aplicando métodos analíticos como base de la investigación teórica y métodos deductivos, con el fin de obtener resultados y sacar conclusiones se aplicó el método descriptivo. Para la recolección de datos se utilizaron dos herramientas el cuestionario PAQ-A y el IMC los cuales se emplearon a través de la aplicación Google Forms a 211 estudiantes de diversas instituciones educativas de Ambato. Después de la recopilación de datos, se probó la hipótesis planteada. Resultado. Los principales resultados muestran los niveles de actividad física y obesidad en los estudiantes de los diferentes establecimientos educativos del Cantón Ambato-Tungurahua, puesto que al analizarlos a cada uno se detectó los riesgos que pueden ocasionar en la salud, razón por la cual se promueve la importancia de la actividad física y la alimentación. Conclusiones. Se identificó el nivel de la Actividad Física en los estudiantes, determinando que en relación con los niveles de actividad física muy bajo, moderado e intenso, los resultados que se obtuvieron fueron menores a comparación del nivel bajo el cual es el que más prevalece entre los dos géneros. Se evaluó los niveles de obesidad en los estudiantes de Ambato-Tungurahua durante el periodo mayo-agosto 2021, estableciendo que los valores entre el género femenino y masculino tienen valores similares en relación con el IMC.
Alimentación para la actividad física saludable: estudio de caso con escolares
Authors: Flores Robalino Rosita Gabriela , Acosta Chisaguano Diana Carolina , Villalba Garzón Gabriela Alexandra , Castro Pantoja Edison Andrés
Published: March 2023

Introducción. Los hábitos alimenticios en la edad escolar se relacionan directamente con los hábitos de práctica de actividad física, incidiendo en los estilos de vida saludable que estos poseen.  Objetivo. Identificar los hábitos alimenticios de los escolares y su relación con los niveles de práctica de actividad física. Metodología. Estudio de enfoque cuantitativo de tipo no experimental, de alcance correlacional con corte transversal, aplicando el cuestionario CHVSAAF para determinación de hábitos alimenticios a una muestra de 84 estudiantes. Resultados. Entre los principales resultados se observa que en la mayoría de los estudiantes existe hábitos alimentarios deficientes, con un nivel medio de práctica de actividad física. Conclusiones. Los datos que se obtuvieron en el estudio nos permitirán buscar alternativas para mejorar los hábitos alimentarios y fomentar la actividad física en los escolares.
El ejercicio físico y el estado de ánimo en adolescentes
Authors: Mayorga Ortiz Diego Javier , Jiménez Ruíz Luis Alfredo , Cevallos Torres Alicia Carolina , Herrera Tapia Javier Fernando
Published: March 2023

La práctica de ejercicio físico presenta varios beneficios en la salud tanto física como mental. La investigación se centrará en esta última. Objetivo: En el presente trabajo investigativo se determina la relación entre el ejercicio físico y el estado de ánimo de los estudiantes de bachillerato de la Unidad Educativa 17 de abril de la provincia de Tungurahua, durante el periodo abril–agosto de 2021. Metodología: Se trata de una investigación cuantitativa, no experimental de alcance descriptivo con método del nivel teórico hipotético-deductivo. Para la recolección de datos se utilizaron dos instrumentos que permitieron medir cada variable en una muestra de estudio de 49 estudiantes perteneciente a segundo de bachillerato. Resultados: Los resultados de la investigación fueron comprobados a través de la prueba chi cuadrado con diferenciación asintótica bilateral en un nivel de P ≤ 0.05 dando como resultado un valor estadístico significativo en el nivel de asociación del ejercicio físico y el estado de ánimo de los estudiantes. Conclusión: Se concluye que el ejercicio físico si influye sobre el estado de ánimo. Cuando existe un nivel alto o moderado de práctica de ejercicio físico, el estado de ánimo del individuo será positivo, por el contrario, al haber un bajo o nulo nivel de práctica de ejercicio físico existirá una tendencia a que se desarrollen estados de ánimo negativos.
Building up the English language listening skill through M-Learning tools. A preliminary study
Authors: Vera de la Torre Ana Jazmina , Mendoza Chavarria Valeria Carolina , Escalante Gamazo Marbella Cumanda , Cumbe Coraizaca Dorys Maribel
Published: March 2023

Introducción. El aprendizaje de una lengua extranjera requiere el manejo de ciertas habilidades y para lograrlo es necesario tomarse el tiempo, aplicar métodos y estrategias, y apreciar el proceso de aprendizaje significativo. Objetivo. El objetivo principal de esta investigación es evaluar las aplicaciones móviles Listening English y 6 Minute English en el desarrollo de la comprensión auditiva. Metodología. Esta investigación se desarrolló en la Unidad Educativa Prócer Manuel Quiroga en Santo Domingo, con 63 estudiantes en su tercer año de secundaria. Como primer paso, se realizó una encuesta entre profesores para identificar el problema. Resultados. Este trabajo utilizó investigación empírica con enfoques cualitativos y cuantitativos. Para recopilar información, se utilizó pruebas estandarizadas previas y posteriores a la prueba. Los estudiantes utilizaron la aplicación móvil durante dos meses. Se utilizó la prueba de Wilcoxon para analizar la información recopilada. Conclusión. Finalmente, los resultados mostraron que las aplicaciones móviles English Listening y 6 Minute English tuvieron un impacto positivo en el desarrollo de la comprensión auditiva. Su estructura, métodos y recursos resultaron muy atractivos para los estudiantes y han aprendido el idioma de forma eficaz. Estos factores hacen que los estudiantes y profesores se sientan cómodos y motivados para desarrollar sus habilidades auditivas.
Competencias digitales docentes y estrategias de aprendizaje en la formación del profesional de educación física
Authors: Castro Pantoja Edison Andrés , Sandoval Gordón Anthony Paúl , Loaiza Dávila Lenin Esteban , Sánchez Cañizares Christian Mauricio
Published: March 2023

Introducción. El nivel de competencias digitales docentes delimita el nivel de aplicación de estrategias de aprendizaje en los estudiantes de formación en el área de Educación Física, ya que el conocimiento y manejo de la tecnología e informática hace que el docente, presente maneras dinámicas y diversas de enseñar. Objetivo. Se planteó determinar el grado de incidencia del nivel de competencias de carácter digital en un grupo de docentes sobre la aplicación de estrategias de aprendizaje enunciadas por los estudiantes universitarios de formación en Educación Física. Metodología. Estudio de enfoque cuantitativo de tipo de investigación   no experimental, de alcance correlacional con un corte transversal, realizado a través de la técnica de la encuesta específicamente 2 cuestionarios validados estadísticamente y por criterio de expertos (Cuestionario de competencias digitales docentes y cuestionario de estrategias de aprendizaje) aplicados en una muestra de 25 docentes y cada uno con un grupo de estudiantes universitarios en formación de Educación física, con un total de 1002 individuos. Resultados. El mayor porcentaje de los docentes en estudio se encontraron en un nivel B2 de competencias digitales y sus estudiantes determinaron que estos se encontraban en un nivel alto de aplicación de estrategias de enseñanza, obteniendo una relación estadística entre las variables en un nivel de P<0.05. Conclusión. El análisis y recolección de datos concluyeron que, efectivamente aquellos docentes con un nivel competencial digital avanzado, poseen un nivel alto de aplicación de estrategias de aprendizaje en los estudiantes universitarios de formación en educación física.
Inteligencia emocional y resiliencia en estudiantes universitarios, durante la pandemia del COVID-19
Authors: Buenaño Salinas Alejandra Lizbeth , Gavilanes López Wilma Lorena , Saltos Salazar Lenin Fabián , Díaz Martín Yanet
Published: March 2023

Debido a que las emociones ejercen gran influencia en la salud física y mental, varios investigadores han enfocado sus trabajos en cómo regular los estados emocionales para facilitar la resolución de conflictos y la adaptación al entorno. Objetivo: El presente estudio establece la relación entre inteligencia emocional y resiliencia en los estudiantes de nivelación de la Facultad de Ciencias Humanas y de la Educación de la Universidad Técnica de Ambato. Metodología: La investigación tiene un enfoque mixto, nivel descriptivo correlacional y modalidad documental, bibliográfica y de campo modalidad virtual. Aportes: Realizado el análisis y la interpretación, los resultados muestran que las dimensiones de inteligencia emocional claridad, atención y reparación se correlacionan con las dimensiones de resiliencia: satisfacción personal, ecuanimidad, confianza en sí mismo, sentirse bien sólo, perseverancia, pues obtienen una significancia bilateral menor a 0,05. Conclusión: Predominó el nivel adecuado de inteligencia emocional, seguido del bajo y del excelente. De igual manera predominó el nivel alto de resiliencia. No se encontraron diferencias significativas en cuanto al género y edad y se comprueba que la inteligencia emocional influye en la resiliencia de los estudiantes de la Universidad Técnica de Ambato.
Determination of Fish Diversity in the Northern Coasts of Cyprus (Eastern Mediterranean) by Visual Census Method
Authors: YALGIN Ferhat , TÜRKER Ali
Published: March 2023

The present study aims to determine fish assemblages spreading between 0 and 40 m depth on the northern coasts of Cyprus. During the study, Underwater Observations (UO) have been conducted in 54 locations and photographed the fish species. The hourly imaging figures of the recorded species were determined by using the Time-Transect Method (TTM). Also, dominance Analysis (DA) and Incidence Frequency Analysis (IFA) of the identified species were performed. As a result, 72 different fish species belonging to 26 families were found to occur in the studied area. After the evaluation of identified species, 56 of them were determined as native species of the Mediterranean and 14 of them as Indo-Pacific origin. Additionally, we provide two new records (Dasyatis chrysonota and Gobius fallax) from Cyprus.
Turbulence anisotropy analysis at the middle section of a highly loaded 3D linear turbine cascade using Large Eddy Simulation
Authors: Fard afshar Nima , Kozulovic Dragan , Henninger Stefan , Deutsch Johannes , Bechlars Patrick
Published: March 2023

This study analyzes the flow over a three-dimensional linear low-pressure turbine cascade blade using large eddy simulation at Re = 90,000. The computational model consists of one blade passage with periodic boundaries and synthetic turbulence is generated at the inlet of the domain. Various flow metrics, including isentropic Mach number distribution at mid-span and wake total pressure losses are compared with available experimental data and found to be in good agreement. A more detailed analysis of the turbulence with particular attention to the separation bubble region is subsequently presented. The analysis revealed that the turbulence is in a nearly two-component state very close to the wall region and gradually follows a certain anisotropy trajectory, as the distance from the wall increases. Even in the free-stream region no fully isotropic state is reached, due to large acceleration and flow turning. The results give a new insight into the state of turbulence within the separation region on the blade suction side and emphasize the deficiencies of the Reynolds-averaged Navier Stokes (RANS) turbulence models in reproducing the turbulence anisotropy. This insight is of relevance for the aerodynamic design of turbines, since large parts of the total pressure loss are generated in the separation region.
On the Riemann Hypothesis
Authors: TAHA BEN MOHAMED ABDELKRIM
Published: March 2023

In this paper we try to disprove the Riemann hypothesis
Analisis Komparasi Performa Bohlam LED Berbagai Merk
Authors: Rahman Azis Prasojo  , Hafiz Furqoni  , Muhammad Fahmi Hakim  , Hari Kurnia Safitri  , Heri Sungkowo
Published: March 2023

LED bulb are increasingly being adopted not only because of their good efficacy, but also because they are known to havehigh controllability. LED lighting has developed rapidly in recent years to achieve more efficient and reliable LED performance. Severalstudies have conducted experiments to obtain the characteristics and performance of LED lamps. However, study comparing theperformance of LED bulbs with various manufacturer and considering the price factor has not been found. In this study, the performancecomparison of six LED bulb manufacturers that are commonly found in the Indonesian market were conducted. Each brand is sampledfrom three rated powers. The results of this study show a weak correlation between the price and performance. Nonetheless, theperformance of LED bulb from different manufacturers were observed.
Instalasi Listrik Penerangan Untuk Masyarakat Binaan Disnaker Di Pemkot Malang
Authors: Sukamdi  , Anang Dasa Novfowan  , Mochammad Mieftah  , Rachmat Sutjipto  , Dhimas Dhesah Kharisma
Published: March 2023

This study discusses the installation of lighting electrical installations that are appropriate and safe for the communityassisted by the Manpower Office in Malang City Government. The existence of this research is expected to provide additional skills ininstalling lighting installations, to be used in working to install lighting installations that are correct and safe and in accordance withstandards, so as to minimize work hazards or accidents due to errors due to installation and use. This research activity was carried out inthe AK Building of Malang State Polytechnic, Jalan Soekarno Hatta Malang by Malang State Polytechnic. The research activity forlighting electrical installations was carried out using a direct practice method. These activities are the introduction of standard electricalinstallation equipment according to PUIL; Introduction of lighting equipment components such as lamps, switches, contact boxes; andInstallation of fittings, contact boxes, pipes, cables, switches. From the results of the research which was carried out for several days, theresults obtained were knowing the practical theory of lighting installation; know the use of PPE properly; know the components of thelighting installation; know the electric measuring instruments; knowing how to install lighting installation components correctly and safely;know what things are done before the object is connected to a power source; and can take measurements when the object has beenconnected to a power source.
Implementasi Kendali Tegangan Lup Tertutup Buck Converter dengan ArduinoMega
Authors: Saputra Masramdhani , Djulihenanto Saddani , Fadlika Irham
Published: March 2023

One type of power converter that is widely applied in the field of renewable energy is DC-DC Converter. In variousapplication cases, voltage control features are often required. One of the challenges is how to build a closed loop controller to control the output voltage of the DC-DC Converter. In this journal, an Arduino Mega based output voltage controller will be implemented. The type of voltage controller implemented is the PI controller with the consideration that the controller has been well-known tested and mathematically proven. The PI controller is set based on closed loop block diagram calculations with the Buck Converter as the main plant. The implementation of the PI controller on the Arduino Mega is based on the expected transient response settings. PI controller was successfully implemented in this study. The experimental results show that, the controller can maintain its voltage along with changes, both source and load voltage. Thus, it can be concluded that the Arduino Mega board can work well in closed loop applications for power converter control.
Analisis Resetting Relay Dan Load Presentase Terhadap Pola Pelaksanaan Dan Pemeliharaan Pada Gardu Induk 150 Kv Saketi Banten
Authors: Kuncoro Rohmanu Dwi , Hermawan Ahmad , Ananto Rhezal Agung
Published: March 2023

The Saketi substation has three 150/70 kV power transformers with a capacity of 3x60 MVA with a frequency of 50 Hzwhere all three transformers have the capacity, transformer 1 60 MVA (PAUWELS TRAFO) has 3 feeders with an average load of 300 A, 10 MW, transformer 2 60 MVA (UNINDO) has 3 feeders with an average load of 200 A, 6.9 MW and transformer 3 60 MVA (UNINDO) has 4 feeders with an average load of 300 A, 10 MW. This calculation and simulation analysis is carried out aiming to find out the relay settings on each transformer under normal conditions and in a maintenance state on one of the transformers for a long period of time. From the results of the analysis and calculation, it was found that the OCR relay setting under normal conditions of the incoming 150 kV transformer transformers 1, 2, and 3 has a current setting value of 0.92 A and a time setting of 0.36 seconds. On the outgoing side the 20 kV transformers 1, 2, and 3 have a setting of 1,039 A and a time setting of 0.166 seconds.
Studi Kinerja Relay Proteksi pada Transformator II 150/20 KV 50 MVA dengan Penyulang Lakarsantri di GIS Karangpilang PT. PLN (Persero) UPT Malang ULTG
Authors: Sugiarto Riska Salsabila , Hanik Ummu , Prasetyo Budi Eko , Ananto Rhezal Agung
Published: March 2023

The substation is one of the components of the electric power system that is an important role in the distribution ofelectrical energy and load regulation. In the process of distributing electrical energy, continuity of good service is needed, but theinterferences still often occur, both internal and external. On Sunday, July 21, 2019 there was an interference, Lakarsantri feeder CB failed to trip so make the incoming 20kV CB trip. That interference was caused by the burning of the Switching Substation in the Citraland area. Therefore, a new relay setting is needed as a recommendation to use transformator 2 to avoid the recurrence of a similar fault. The relay settings have shown good results where the working time of the relay on the outgoing feeder side is faster than the incoming feeder 20kV and the incoming transformator 150kV side, when coordination simulated using the E-TAP 12.6.0 software by entering the current setting and the time setting, it shows good coordination because when there is an interference on the outgoing feeder, CB outgoing feeder works first, not the incoming feeder 20kV CB or the incoming transformator 150kV CB. Preventive maintenance on other equipment such as CB and CT need to be be done to increase of equipment reliability to reduce the occurs of protection failure or damage to the equipment.
Analisis Perencanaan Sistem Jaringan Distribusi Listrik dan Perkembangan Beban Pada Perumahan The Grand Kenjeran Surabaya
Authors: Epiwardi  , Ruwah Joto  , Muhammad Urfan Barran Rusyda Marzuq
Published: March 2023

he electric power system is a system consisting of several parts, namely generating units, transmission units, distributionunits, and load units that are interconnected and work together to serve the electricity needs of customers according to their needs. In theprocess itself, electrical energy is distributed from the generator through the transmission network until it is received by consumers orcustomers so that in this case a related plan is needed. Planning here aims to get an optimal service flexibility so that it is able to quicklyanticipate the growth of electrical energy and how dense the load that must be served. So that the planning of the electricity distributionnetwork system must pay attention to the load conditions in the field, this is intended so that the planned distribution network system can stillwork well for the next few years. The data collection method used is in the form of field observations which aim to determine field conditionsand obtain load data that will be planned. The results of research conducted at The Grand Kenjeran Surabaya housing show that there are76 housing units to be built in this housing. The 76 housing units will be divided into 4 blocks D, E, F, G and are planned with an initial powerof 5500 VA for each housing unit along with Public Road Planning in residential areas. Taking into account field conditions, ground cablesare used as a distribution network system which includes SKTM and SKTR. The total power obtained is 435,107.5 VA and is served by 3units of distribution transformer using Pole Transformer Substation, 3 PHB-TR, 12 Main PHB, and 3 Branch PHB. The magnitude of thepossible voltage drop is around 0.97% for medium voltage, 0.3% - 0.92% for Main PHB group, 0.7% - 1.54% for Branch PHB group.
ANALISIS PENAMBAHAN NUTRISI PADA TANAMAN HIDROPONIK BERBASIS INTERNET OF THINGS
Authors: Priya Surya Harijanto  , Masramdhani Saputra  , Oky Achmad E
Published: March 2023

In an increasingly advanced era, electrical energy has become a basic resource for humans, the wider and more equitabledistribution has greatly influenced the progress of all sectors of electricity users. However, on the other hand, this hydroponic businessrequires precision and special attention by the actors to support the maximum success of the hydroponic business. Several previous toolshave been able to overcome the problem of irrigation for hydroponic plants. However, there is no tool that can regulate the addition ofnutrients based on the internet of things and monitor the hydroponics. So, a tool for adding nutrients to hydroponic plants based on theinternet of things was designed that is equipped with supervision on plant nutrition. It is hoped that after the manufacture and analysis oftools on hydroponic plants can overcome the problems that are often experienced by hydroponic entrepreneurs.The research wasconducted from May to July 2022 in Margoutomo Dalam, Dau, Malang. This nutrient addition tool is designed using an Arduino Unomicrocontroller where as a regulator and NodeMCU is added as an online access on the user's cellphone. After the tool has been designed,a regression analysis is carried out to determine the effect of nutrient levels on the fertility of hydroponic plants. The results of this studyshowed that the nutritional value of a good plant was 350 ppm, with the response rate of this nutrition enhancer at 1.62% per second at adistance of 338 km for testing the user.
Analisis Keandalan Sistem Distribusi 20kV Pada Penyulang Pujon PT. PLN (PERSERO) ULP Batu
Authors: Wijaya Kusuma  , Ruwah Joto  , Mochammad Mieftah
Published: March 2023

At PT. PLN (Persero) ULP Batu, Pujon feeder is one of the 9 feeders in the distribution system that supplies severalareas in PT. PLN (Persero) ULP Batu. At the Pujon feeder, the number of disturbances that occurred from January to November 2021occurred twenty-two times, with details of eighteen temporary disturbances and four permanent disturbances. The number of disturbancesthat often occur can affect the feeder who is working normally. This can cause voltage drops and power losses, causing the flow of electricpower to be less than optimal and detrimental to customers or consumers. Because it requires maneuvering so that the disturbance does notspread to all feeders and cause one feeder to experience a blackout. Based on the problems that occur, maneuver analysis is needed toreduce the impact of disturbances on the Pujon feeder and to maintain the reliability value of the distribution system at PT. PLN (Persero)ULP BATU.
Analisis Perbaikan Sistem Pentanahan Tower 70 kV pada Transmisi Wlingi - Blitar
Authors: Prasetyo Budi Eko , Hermawan Ahmad , Azizah Safira
Published: March 2023

70 KV High Voltage Air Line (in Indonesian known as SUTT) is defined as part of an electric power transmission network that islikely to be struck by lightning. This condition may lead to back flashover (BFO) phenomenon if the grounding value in the transmission is found to be high (>5 Ohms) and may also generate equipment failure. This research was intended to analyze the grounding improvement in tower T17, so that traveling-wave voltages may not result in failure of the main equipment at the substation, specifically the transformer. The value of the traveling wave at the substation was measured through simulation by means of the ATP Draw application in tower T17 to the substation. The grounding value may be reduced by increasing and widening the distance between the electrodes. The value obtained by modeling 4 electrodes with a distance of 0.5 meter was amounted to 1.73 Ohms. Furthermore, modeling 3 electrodes with a distance of 1 meter had successfully generated a value of 1.06 Ohm, and a value of 1.67 Ohm was also successfully obtained through modeling 2 electrodes with a distance of 2 meters. The ground resistance with a value of 67.05 Ohms that has not been repaired will lead to back flashover (BFO) caused by lightning strikes. However, this may be reduced properly with a lightning arrester which is capable of cutting the overvoltage at the substation, so that the voltage entering the transformer is below the BIL (Basic Insulation Level) value.
Deep Reinforcement Learning: A New Beacon for Intelligent Active Flow Control
Authors: Xie Fangfang , Zheng Changdong , Ji Tingwei , Zhang Xinshuai , Bi Ran , Zhou Hongjie , Zheng Yao
Published: March 2023

The ability to manipulate fluids has always been one of the focuses of scientific research and engineering application. The rapid development of machine learning technology provides a new perspective and method for active flow control. This review presents recent progress in combining reinforcement learning with high-dimensional, non-linear, and time-delay physical information. Compared with model-based closed-loop control methods, deep reinforcement learning (DRL) avoids modeling the complex flow system and effectively provides an intelligent end-to-end policy exploration paradigm. At the same time, there is no denying that obstacles still exist on the way to practical application. We have listed some challenges and corresponding advanced solutions. This review is expected to offer a deeper insight into the current state of DRL-based active flow control within fluid mechanics and inspires more non-traditional thinking for engineering.
Fast, cheap and sensitive: Homogenizer-based RNA extraction free method for SARS-CoV-2 detection by RT-qPCR
Authors: Ramírez-Córdova Cristina , Morales-Jadán Diana , Alarcón-Salem Sofía , Sarmiento-Alvarado Alisson , Proaño María Belén , Camposano Isabel , Sarmiento-Alvarado Berenice , Bravo-Castro Mishell , Hidalgo-Jiménez Jean Franco , Coello Dayana , Rodríguez Ángel S. , Viteri-Dávila Carolina , Vallejo-Janeta Alexander Paolo , Arcos-Suárez Daniela , Garcia-Bereguiain Miguel Angel
Published: March 2023

Background

The SARS-CoV-2 gold standard detection method is an RT-qPCR with a previous step of viral RNA extraction from the patient sample either by using commercial automatized or manual extraction kits. This RNA extraction step is expensive and time demanding.

Objective

The aim of our study was to evaluate the clinical performance of a simple SARS-CoV-2 detection protocol based on a fast and intense sample homogenization followed by direct RT-qPCR.

Results

388 nasopharyngeal swabs were analyzed in this study. 222 of them tested positive for SARS-CoV-2 by the gold standard RNA extraction and RT-qPCR method, while 166 tested negative. 197 of those 222 positive samples were also positive for the homogenization protocol, yielding a sensitivity of 88.74% (95% IC; 83.83 – 92.58). 166 of those negative samples were also negative for the homogenization protocol, so the specificity obtained was 97% (95% IC; 93.11 – 99.01). For Ct values below 30, meaning a viral load of 103 copies/uL, only 4 SARS-CoV-2 positive samples failed for the RNA extraction free method; for that limit of detection, the homogenizer-based method had a sensitivity of 97.92% (95% CI; 96.01 – 99.83).

Conclusions

Our results show that this fast and cheap homogenization method for the SARS-CoV-2 detection by RT-qPCR is a reliable alternative of high sensitivity for potentially infectious SARS-CoV-2 positive patients. This RNA extraction free protocol would help to reduce diagnosis time and cost, and to overcome the RNA extraction kits shortage experienced during COVID-19 pandemic.
Refractile bodies of Eimeria tenella are proteinaceous membrane-less organelles that undergo dynamic changes during infection
Authors: Burrell Alana , Marugan-Hernandez Virginia , Graefin Von Der Recke Karolin , Aguiar-Martins Kelsilandia , Gabriel Heloisa Berti , Tomley Fiona M. , Vaughan Sue
Published: March 2023

Introduction

Refractile bodies (RB) are large membrane-less organelles (MLO) of unknown function found as a prominent mismatched pair within the sporozoite stages of all species of Eimeria, parasitic coccidian protozoa.

Methods

High resolution imaging methods including time-lapse live confocal microscopy and serial block face-scanning electron microscopy (SBF-SEM) were used to investigate the morphology of RB and other intracellular organelles before and after sporozoite invasion of host cells.

Results

Live cell imaging of MDBK cells infected with E. tenella sporozoites confirmed previous reports that RB reduce from two to one post-infection and showed that reduction in RB number occurs via merger of the anterior RB with the posterior RB, a process that lasts 20-40 seconds and takes place between 2- and 5-hours post-infection. Ultrastructural studies using SBF-SEM on whole individual sporozoites, both pre- and post-host cell invasion, confirmed the live cell imaging observations and showed also that changes to the overall sporozoite cell shape accompanied RB merger. Furthermore, the single RB post-merger was found to be larger in volume than the two RB pre-merger. Actin inhibitors were used to investigate a potential role for actin in RB merger, Cytochalasin D significantly inhibited both RB merger and the accompanying changes in sporozoite cell shape.

Discussion

MLOs in eukaryotic organisms are characterised by their lack of a membrane and ability to undergo liquid-liquid phase separation (LLPS) and fusion, usually in an actin-mediated fashion. Based on the changes in sporozoite cell shape observed at the time of RB merger together with a potential role for actin in this process, we propose that RB are classed as an MLO and recognised as one of the largest MLOs so far characterised.
Modeling the human placental barrier to understand Toxoplasma gondii´s vertical transmission
Authors: Faral-Tello Paula , Pagotto Romina , Bollati-Fogolín Mariela , Francia Maria E.
Published: March 2023

Toxoplasma gondii is a ubiquitous apicomplexan parasite that can infect virtually any warm-blooded animal. Acquired infection during pregnancy and the placental breach, is at the core of the most devastating consequences of toxoplasmosis. T. gondii can severely impact the pregnancy’s outcome causing miscarriages, stillbirths, premature births, babies with hydrocephalus, microcephaly or intellectual disability, and other later onset neurological, ophthalmological or auditory diseases. To tackle T. gondii’s vertical transmission, it is important to understand the mechanisms underlying host-parasite interactions at the maternal-fetal interface. Nonetheless, the complexity of the human placenta and the ethical concerns associated with its study, have narrowed the modeling of parasite vertical transmission to animal models, encompassing several unavoidable experimental limitations. Some of these difficulties have been overcome by the development of different human cell lines and a variety of primary cultures obtained from human placentas. These cellular models, though extremely valuable, have limited ability to recreate what happens in vivo. During the last decades, the development of new biomaterials and the increase in stem cell knowledge have led to the generation of more physiologically relevant in vitro models. These cell cultures incorporate new dimensions and cellular diversity, emerging as promising tools for unraveling the poorly understood T. gondii´s infection mechanisms during pregnancy. Herein, we review the state of the art of 2D and 3D cultures to approach the biology of T. gondii pertaining to vertical transmission, highlighting the challenges and experimental opportunities of these up-and-coming experimental platforms.
Effect of metformin on sepsis-associated acute lung injury and gut microbiota in aged rats with sepsis
Authors: Wan Youdong , Wang Shuya , Niu Yifan , Duo Boyang , Liu Yinshuang , Lu Zhenzhen , Zhu Ruixue
Published: March 2023

Background

Recent studies reported the association between the changes in gut microbiota and sepsis, but there is unclear for the gut microbes on aged sepsis is associated acute lung injury (SALI), and metformin treatment for the change in gut microbiota. This study aimed to investigate the effect of metformin on gut microbiota and SALI in aged rats with sepsis. It also explored the therapeutic mechanism and the effect of metformin on aged rats with SALI.

Methods

Aged 20-21 months SD rats were categorized into three groups: sham-operated rats (AgS group), rats with cecal ligation and puncture (CLP)-induced sepsis (AgCLP group), and rats treated with metformin (100 mg/kg) orally 1 h after CLP treatment (AgMET group). We collected feces from rats and analyzed them by 16S rRNA sequencing. Further, the lung samples were collected for histological analysis and quantitative real-time PCR (qPCR) assay and so on.

Results

This study showed that some pathological changes occurring in the lungs of aged rats, such as hemorrhage, edema, and inflammation, improved after metformin treatment; the number of hepatocyte death increased in the AgCLP group, and decreased in the AgMET group. Moreover, metformin relieved SALI inflammation and damage. Importantly, the gut microbiota composition among the three groups in aged SALI rats was different. In particular, the proportion of E. coli and K. pneumoniae was higher in AgCLP group rats than AgS group rats and AgMET group rats; while metformin could increase the proportion of Firmicutes, Lactobacillus, Ruminococcus_1 and Lactobacillus_johnsonii in aged SALI rats. Moreover, Prevotella_9, Klebsiella and Escherichia_Shigella were correlated positively with the inflammatory factor IL-1 in the lung tissues; Firmicutes was correlated negatively with the inflammatory factor IL-1 and IL-6 in the lung tissues.

Conclusions

Our findings suggested that metformin could improve SALI and gut microbiota in aged rats, which could provide a potential therapeutic treatment for SALI in aged sepsis.