bluuebunny/crossref_metadata_2025 huggingface dataset:
SITUATIONAL TASKS AS AN EFFECTIVE TOOL OF KNOWLEDGE CONTROL OF HIGHER EDUCATION’S APPLICANTS
Authors: YARNYKH T. , RUKHMAKOVA O. , ORLOVETSKA N.
Published: April 2021

The organization of the educational process in a higher educational institution must meet the world standards of higher education, provide active motivation for higher education’s applicants to obtain professional knowledge and guarantee quality education. The modern process of professional training in Ukraine is carried out under the influence of the requirements of the European educational space.

Higher School of Pharmacy is dynamically developing and constantly changing, improving the quality of specialists with higher pharmaceutical education, which is provided by improving educational programs in each discipline and a new approach to their teaching.

The article considers the role of situational tasks as an effective tool for monitoring the knowledge of higher education’s applicants. It is shown that the method of knowledge control using situational tasks encourages higher education’s applicants to study not only basic but also additional educational literature, to improve methods of self-control of knowledge and skills.

Situational tasks are one of the means to achieve high efficiency of educational activities of higher education’s applicants in the development of certain competencies through various types of vocational education. They are especially important in distance education, as they provide a high level of independence and creativity in the cognitive activity of higher education.
Broyler Beslemede Protein İhtiyacının Karşılanmasında Yeni Bir Yaklaşım: Böcekler
Authors: ODABAŞI Fulya , YEŞİLBAĞ Derya
Published: April 2021

Ülkemiz hayvancılığının gelişmesinde etkili olan sektörlerden biri de kanatlı sektörüdür. Sektörde ilerleyebilmek için yüksek verimli ırkların kullanılması yanında hayvanların besin madde ihtiyaçları yönünden yeterli ve dengeli diyetlerle beslenme zorunluluğu vardır. Bu zorunluluk kanatlı hayvanların sindirim sistemi fizyolojik yapısından kaynaklanmakta ve sindirimi daha kolay ve esansiyel besin maddelerince zengin ham maddelerin kullanımını gerekli kılmaktadır. Kanatlıların tüketimine sunulan karma yem tüm besin maddelerini içeren ham maddelerin toplamından oluşmaktadır. Bu nedenle karma yemlerinin hazırlanmasında gereksinim duyulan enerji ve protein kaynaklarının sürdürülebilir şekilde diyete ilave edilmesi oldukça önemlidir. Ülkemiz, değerli protein kaynakları açısından kendi kendine yetebilen bir ülke konumunda olmadığından bu kaynakları dışarıdan almak zorundadır. Kanatlı diyetlerinin protein açığının kapatılmasında, diyetin temelini oluşturan bitkisel ve hayvansal protein kaynaklarına alternatif yeni ham madde arayışı devam etmektedir. Bu alternatif kaynaklardan birisi de böceklerdir.
Removal of COD, TOC, and Color from Textile Industry Wastewater by Using Phanerochaete chrysosporium
Authors: YILDIRIM Numan , ERGÜVEN Gökhan Önder , ÇELİK Aytekin
Published: April 2021

Wastewater discharge from textile industries concern environmental risks. Superiority of microbial methods over other high cost combined methods includes conversion of persistent organic materials to non-toxic last materials, sustainability, low cost, and comfortable. Textile wastewaters can have opposite effects on the quality of water in total organic carbon (TOC) and Chemical oxygen demand (COD). Agitation cultures can reach the surface area of the dyes, whereas a static cannot do. Biotreatment of textile wastewater from the dyeing process using white-rot fungus Phanerochaete chrysosporium (P.C) was investigated in agitated and static culture conditions. Dye is the major pollutant component in this wastewater includes some different organic pollutants. The treatment mediums containing distilled water in 1:10 ratio of wastewater were compared for treatment efficiency of P.C. Especially in agitated conditions at 27 oC and 150 rpm, it was achieved a successful treatment results. Under these conditions, a 48h long treatment reduced by 91,46 % of the original COD (from 1484 mg l-1) and by 94,92% the TOC (initial was 723.66 mg l-1). Moreover, treatment reduced color by 86,28 % from 3.550 A540 to 0.487 A540 at the end of the study. The decolorization properties of P.C obtained high performance and we determined P.C showed up to effective removal rate for COD and TOC within 48 hours. We suggest that these fungus pellets of P.C can reach the decolorization and can be a useful tool for bioremediation of textile dye wastewater within a short time period.
Perancangan maximum power point tracking dengan algoritma incremental conductance untuk PLTS 100 Wp
Authors: Assegaf Abdullah , Aming Dedi , Alvianto Febri
Published: April 2021

Efisiensi konversi energi yang rendah menjadi masalah utama padaupembangkit listrikutenagausurya (PLTS). Makalah ini membahas tentang implementasi metode maximum power point tracking (MPPT) dengan algoritma incremental conductance (IC) pada sistem panel surya dengan kapasitas 100 Wattpeak (Wp) yang bertujuan untuk mendapatkan daya keluaran yang paling optimal dari panel surya. Sistem dibangun dengan menggunakan konverter DC/DC buck-boost dan mikrokontroler sebagai pengolah algoritma MPPT serta pusat kendali sistem. Mikrokontroler akan mengontrol duty cycle dari konverter buck-boost dan memastikan bahwa panel surya selalu beroperasi pada kondisi titik daya maksimum dengan menggunakan algoritma IC. Hasil pengujian menunjukkan bahwa penggunaan metode MPPT dengan algoritma IC pada sistem panel surya 100 Wp dapat memaksimalkan daya keluaran dari panel surya sebesar 56%-94% dibandingkan dengan penggunaan panel surya secara langsung tanpa menggunakan MPPT.
Sistem bandwidth WiFi jaringan ad-hoc menggunakan metode class based queue
Authors: Hariyanto Teddi , Rahayu Maya
Published: April 2021

Mobile ad-hoc network (MANET) merupakan jaringan ad-hoc yang dibangun oleh perangkat-perangkat bergerak, salah satunya adalah laptop. Jaringan tersebut merupakan jaringan nirkabel yang bersifat infrastructureless. Jaringan ini mampu mengkomunikasikan node secara peer-to-peer tanpa basic service set (BSS). Ketidakberadaan BSS pada jaringan ini menyulitkan para pengguna dalam mengalokasikan uplink bandwidth bagi node/link kritikal dan mencegah terjadinya flooding pada jaringan. Penelitian ini bertujuan untuk merancang sebuah bandwidth management tool berupa program yang diimplementasikan untuk mengalokasikan uplink bandwidth pada jaringan ad-hoc. Program yang dirancang menggunakan metode CBQ untuk classifying dan scheduling paket. Dari hasil pengujian, sistem bandwidth WiFi jaringan ad-hoc menggunakan metode CBQ ini memiliki kinerja throughput 513,24 Kbps yang diperoleh melalui perhitungan average rounded trip time.
Indoor location tracking pegawai berbasis Android menggunakan algoritma k-nearest neighbor
Authors: Ramadona Suci , Diono Muhammad , Susantok Mochamad , Ahdan Syaiful
Published: April 2021

Dalam sebuah perusahaan besar biasanya memiliki banyak karyawan. Tetapi jumlah karyawan yang banyak tersebut dapat menyebabkan kurangnya pengawasan dan pengendalian terhadap sistem kerja pegawai. Tumbuhnya teknologi informasi memberikan peluang untuk menyelesaikan permasalahan ini. Salah satu teknologi yang bisa digunakan adalah wireless positioning sytem (WPS). Pemanfaatan teknologi ini memberikan solusi dengan memberikan informasi posisi pegawai berdasarkan kekuatan sinyal WiFi yang dipancarkan dari telepon genggam. Penelitian ini bertujuan untuk merancang sistem indoor location tracking berbasis Android dengan algoritma k-nearest neighbor (K-NN). Pada sistem ini, proses rancang bangun dilakukan melalui tahapan perhitungan pembacaan posisi dari client, perbandingan database dengan menggunakan algoritma K-NN, dan metode fingerprint localization sehingga informasi koordinat client dapat ditampilkan dalam peta koordinat secara real-time. Berdasarkan hasil pengujian, rancang bangun sistem yang telah dilakukan  memiliki keakuratan sangat baik. Rata rata akurasi data besar dari 60% dengan kondisi client yang bergerak aktif maupun diam di tempat.
Implementasi algoritma pendeteksi tingkat kepadatan lalu lintas menggunakan metode background subtraction
Authors: Fadhlan Muhammad Yusuf , B. Hanafi Usman , Aulia Mohamad Rifki
Published: April 2021

Kondisi kepadatan lalu lintas merupakan salah satu faktor yang berpengaruh terhadap kapasitas jalan. Pemanfaatan teknologi dapat dilakukan untuk mempermudah proses pemantauan kepadatan lalu lintas. Beberapa teknologi telah dibuat dan dikembangkan, namun masih memiliki fitur yang terbatas. Dalam penelitian ini, dirancang sebuah purwarupa sistem informasi tingkat kepadatan lalu lintas berdasarkan persentase kapasitas jalan yang dilalui oleh kendaraan. Penelitian ini menggunakan image processing dengan metode background subtraction dari library OpenCV yang dibuat di software Pycharm untuk mengolah rekaman video. Metode tersebut digunakan untuk menghasilkan persentase kapasitas jalan berdasarkan perbandingan luas area kendaraan terhadap luas area jalan. Dari hasil pengujian yang dilakukan dapat diketahui bahwa tingkat kepadatan lalu lintas yang tinggi dan jumlah kendaraan yang banyak berpengaruh terhadap kinerja sistem dalam mendeteksi kendaraan yang melintas.
Sistem kendali posisi motor DC menggunakan state feedback controller dan real-time operating system
Authors: Martin Martin
Published: April 2021

Motor DC merupakan sistem penggerak yang paling banyak digunakan di bidang industri, otomasi, robotika, ataupun lainnya. Penggunaan sistem kendali banyak diterapkan untuk pengaturan pergerakan kecepatan ataupun posisi dari motor DC. Pada penelitian ini, state feedback controller dan penambahan kendali integral dengan estimator digunakan untuk mengendalikan posisi motor DC. Sistem dibuat berbasis real-time operarting system (RTOS) untuk pembacaan sensor, perhitungan matematis kendali, dan pengiriman sinyal pulse width modulation (PWM). Pengendalian dilakukan pada motor DC Quanser yang terhubung dengan Arduino Mega 2560 untuk membaca sensor encoder dan menampilkan data pengujian. Hasil pengujian menunjukkan bahwa state feedback controller dapat mengendalikan posisi motor DC dengan nilai penguat K sebesar 2,66 dan 115,37, nilai penguat N_bar sebesar 0,49 dan nilai estimator sebesar 7,75 dan 0,26. Penggunaan RTOS sebagai inti pemrograman dapat menyelesaikan permasalahan dalam pengerjaan task-task­ seperti pembacaan sensor, perhitungan parameter kendali, dan pengiriman sinyal kendali tanpa terjadi error selama pengujian sistem. Hasil analisa menunjukan keluaran sistem kendali posisi memiliki nilai overshoot sebesar 2,63% pada pengujian pertama dan 2,66% pada pengujian kedua.
"Si no te vas ahora, después no te vas más"
Authors:   , Torti Bárbara
Published: April 2021

Las experiencias juveniles en la escuela secundaria tienen lugar actualmente en un escenario que combina el aumento de la cobertura del nivel y el consecuente cambio en la composición social de quienes asisten, con un sistema educativo caracterizado por producir y reproducir de modo fragmentado las desigualdades sociales. Al mismo tiempo, el surgimiento de nuevas universidades nacionales en el interior del país supone también la diversificación de los públicos que conforman la matrícula en el nivel superior. De este modo cobra relevancia comprender y analizar de qué manera lxs estudiantes de último año del nivel secundario optan por una u otra universidad, y qué lugar ocupan las universidades públicas nacionales de creación reciente en las expectativas y consideraciones de lxs jóvenes. En ese sentido, el propósito de esta investigación fue reconstruir el horizonte de expectativas de lxs estudiantes de último año de secundarias del interior de la Provincia de Buenos Aires frente a la nueva oferta de universidades públicas nacionales. La perspectiva teórica considerada en la investigación se cimienta en la obra de Pierre Bourdieu, particularmente se retoman los conceptos de capital cultural y habitus estudiados desde un punto de vista relacional. De esta manera, el interés radicó en la interpretación de los significados atribuidos por lxs sujetos a sus acciones a través de un diseño metodológico cualitativo que contempló técnicas de investigación como los grupos focales y las entrevistas individuales. Entre los principales resultados obtenidos se encuentra la preponderancia de la elección de la ciudad donde radicarse por encima de la elección de una universidad en particular, así como también la resignificación de dicha decisión entendida como una manifestación de la autonomía individual.
Preschool Language Experience of Dual Language Learners and English Monolingual Children
Authors: Choi Ji-Young , Van Pay Craig K. , Beecher Constance
Published: April 2021

This study explored the quantitative language experiences of dual language learners (DLLs; n = 19) and English monolinguals (EM; n = 13) in preschool classrooms where English is the primary language of instruction. Using the Language ENvironment AnalysisTM system as a primary tool, we analyzed an average of 34 hours of recordings collected over 5 to 8 days for each participating child (Mage = 52 months) in 6 classrooms. Results showed that DLLs spoke as much as EMs but heard less adult talk overall and had more 5-minute recording segments with zero adult-child conversations than their English EM peers during typical preschool days. When we focused on adult-child conversational contexts, DLLs, relative to EMs, heard less adult talk during conversations that were child-initiated but not during conversations that were adult-initiated. Follow-up analyses also showed that teachers talk more and longer when they initiated conversations than when children initiated conversations for both DLLs and EMs, while children spoke more in child-initiated conversations. Study implications and future research are discussed.
Sobre Ondas Gravitacionales
Authors: Gamboa Jorge
Published: April 2021

Realizamos un resumen histórico y anecdótico del desarrollo y posterior descubrimiento de las ondas gravitacionales. Primero, explicamos el contexto histórico del desarrollo de la teoría de la relatividad general y como se entendía en la época que fue formulada, segundo, enfatizamos las ideas desarrolladas por Einstein y Rosen y las dificultades conceptuales que ellos enfrentaron. La radiación gravitacional no se podía entender siguiendo el conocimiento que Einstein tenía en su época. Explicamos con anécdotas cómo se llegó al actual estado de conocimiento pasando por varios aspectos que, aunque muy técnicos, se explican de manera accesible al público general. Explicamos el origen de la clasificación de soluciones de onda plana de la teoría de Einstein y el posterior descubrimiento de las soluciones de Bondi y Pirani para terminar con el descubrimiento final de la colaboración LIGO y su premio Nobel en 2017.
Factores determinantes de la docencia no presencial en la Universidad de Santiago de Chile durante la pandemia del Covid-19. Estudio piloto con técnicas prospectivas
Authors: Peña Angélica
Published: April 2021

La pandemia del Covid-19 fue una sorpresa para el sistema educativo mundial, y obligó a la Universidad de Santiago de Chile a implementar de manera urgente la docencia no presencial usando el programa de comunicaciones Zoom. El objetivo primario de este estudio fue poner a punto una metodología para evaluar los factores que incidieron en la docencia no presencial, para lo cual se usaron los métodos Delphi y MICMAC con el fin de revelar visiones de consenso del cuerpo académico, según su experiencia durante el primer semestre de 2020. El segundo objetivo fue hacer una descripción piloto de los factores que influyeron en la docencia no presencial. Se reclutó a docentes de jornada completa de la Facultad de Administración y Economía (n=16), y de la de Química y Biología (n=21). Los resultados mostraron que los factores socio económicos y de salud mental estudiantil fueron los que más incidieron en la docencia durante este período, desplazando a un segundo lugar a los relacionados con la didáctica en la sala de clases, y que la metodología propuesta brinda herramientas apropiadas para la evaluación de la docencia no presencial.
Comparative European DigCompEdu Framework (JRC) and Common Framework for Teaching Digital Competence (INTEF) through expert judgment
Authors: Cabero-Almenara Julio , Gutiérrez-Castillo Juan Jesús , Palacios-Rodríguez Antonio , Barroso-Osuna Julio
Published: April 2021

Digital technology, as one of the elements of the Knowledge Society, assumes a determining role in educational systems, where the role of teachers is fundamental. Along these lines, different institutions support the importance of teaching digital skills, proposing models and conceptual frameworks. In them, the knowledge and skills that teachers must develop are classified, combining technological, professional, organizational and pedagogical capacities, with different dimensions and descriptors. The objective of this article is to compare and evaluate the feasibility of the DigCompEdu European Digital Competence Framework for Teachers (JRC) and the Common Framework for Teaching Digital Competence (INTEF). To do this, it is decided to carry out a theoretical reflection on said frameworks and a subsequent Delphi study with the coefficient of expert competence (CEC). 335 people participated, of which 275 (82.1%) were considered experts (CEC ≥ 0.8). The results indicate that, although they are very similar, the European DigCompEdu Teaching Digital Competence Framework is the most endorsed by experts. Finally, the idea that both are viable proposals to develop teaching digital skills through personalized training itineraries is presented.
aprendizaje de las tecnologías en el área de lengua castellana y literatura
Authors: Melguizo Moreno Elisabeth
Published: April 2021

Las tecnologías de la información y la comunicación han formado parte de los currículos de enseñanza ante la demanda de una nueva sociedad digital. En esta contribución se estudia el aprendizaje de las tecnologías en el área de Lengua Castellana y Literatura durante la Educación Primaria, en el proyecto educativo Superpixépolis de la editorial Edelvives. Se desarrolla un enfoque metodológico mixto; cualitativo, que gira en torno al análisis de los contenidos digitales en 16 libros de texto, por parte de docentes expertos en la materia; y cuantitativo, mediante el programa IBM SPSS Statistics 26.0, a través de un análisis descriptivo de las siguientes variables: curso, tipo de contenido digital, bloque del libro, complejidad de la actividad, destrezas lingüísticas y agrupamientos. Los resultados han mostrado una presencia importante de actividades digitales en los libros de texto (N= 89) correspondientes, en su mayoría, a segundo y tercer ciclo de Primaria; trataban de búsquedas de información en Internet o consulta de fuentes digitales; pertenecían al bloque de Técnicas de estudio (Repasa o Literatura); eran de un nivel intermedio; trabajaban las destrezas escritas y se planteaban de forma individual. Se concluye que el aprendizaje de contenidos tecnológicos en los libros de texto aún debe mejorar, puesto que no fomenta apenas las destrezas orales ni el aprendizaje colaborativo y tampoco posee identidad propia, ya que se desarrolla fundamentalmente en técnicas de estudio, repaso o literatura.
Principales vertientes de los estudios de alfabetización en Brasil
Authors: Silva Cícero da , Gonçalves Adair Vieira
Published: April 2021

El objetivo de este artículo es contextualizar los estudios de alfabetización en Brasil, puntualizando las líneas de investigación y marcos teóricos principales. Esta exploración es de naturaleza bibliográfica, con un enfoque cualitativo-interpretativo. Primero, se plantean las referencias sobre los estudios de alfabetización y sus diferentes líneas, como la alfabetización académica, la escolar, la docente, la digital, la literaria y la científica. Luego, se realiza una consulta parametrizada en el sitio web del Directorio de Grupos de Investigación en Brasil, perteneciente al Consejo Nacional para el Desarrollo Científico y Tecnológico, donde se identifican las líneas y respectivos grupos investigativos vinculados a los estudios de alfabetización. Este levantamiento revela suficientes referencias sobre el tema, así como que las diversas perspectivas corroboran la trascendencia y las contribuciones de estas líneas investigativas, promovidas por el New London Group y los Nuevos Estudios de Alfabetización.
Analisis Pengaruh Pengetahuan, Kepribadian, dan Reputasi Terhadap Keputusan Masyarakat Memilih Bank Syariah di Banda Aceh
Authors: Riza Akmal , Hakim Lukman , Eliana Eliana
Published: April 2021

The study was conducted to determine the effect of knowledge, personality and reputation on people's decisions to choose Islamic banks. The research subjects were all people of Banda Aceh city in early 2020 as many as 270.321 people using the Slovin formula with cluster random sampling technique representing 9 sub districts total 100 respondents using Islamic banking services. The data analysis technique uses linear regression to answer the proposed hypothesis. The results show that all independent variables of knowledge, personality and reputation influence the variables related to the customers decision to choose Islamic bank in the city of Banda Aceh.
Agritourism entrepreneurship in Greece: policy framework, inhibitory factors and a roadmap for further development
Authors:   Director General for Tourism Policy, Ministry of Tourism, Greece & Adjunct Professor of Higher Education, Hellenic Open University, Patras, Greece, Dionysopoulou Panagiota
Published: April 2021

Purpose: This paper aimed to examine how agritourism as a mild form of tourism can contribute to sustainable tourism development. Research methodology: A primary survey was conducted using a closed-type questionnaire of multiple-choice questions and sent to a respective enterprise sample. Results: The survey's output refers to the steps and measures that need to be taken for the further development of agritourism in Greece and its driving force as a pillar of sustainability growth. Limitations: The research addressed certain methodological issues, such as the difficulty of collecting the sample, since agritourism companies are not in total registered in Greece. There was also difficulty obtaining contact details (email, fax) from the list of final approved investments of the National Strategic Reference Framework. Contribution: The purpose is to present the views of agritourism entrepreneurs on their industry and identify the possible problems they encountered during their businesses' start-up and operation due to the legal or financial framework. Also, the state's role in this direction is examined and proposals are made for the further development of agritourism in Greece. Keywords: Farmer, Law 4276/2014, Legal framework of agritourism, National strategic reference framework, Rural tourism, State aid, Sustainable development
Enhancing the competitive advantage for tourist souvenirs in Egypt: a marketing approach
Authors:   Faculty of Tourism and Hotels, Suez Canal University, Ismailia, Egypt, Elhoda Ali Nour , Abdallah Mohamed Ghada ,   Faculty of Tourism and Hotels, Suez Canal University, Ismailia, Egypt, Atef Alakhras Hebatullah ,   Faculty of Tourism and Hotels, Suez Canal University, Ismailia, Egypt
Published: April 2021

Purpose: The main aim of this research is to study the relationship between innovative marketing - in its various dimensions (innovation in product, innovation in price, innovation in promotion, innovation in distribution) - and enhancing the competitive advantage of tourist souvenirs in Egypt. Research methodology: The study adopted the descriptive-analytical approach for accurate and detailed descriptions of the study’s subject quantitatively and qualitatively and analyzed data available on this subject. The field study included surveying a random sample of tourists who frequented the souvenirs and handicrafts stores in various tourist cities in Egypt. Results: There is a statistically significant effect of innovative marketing in enhancing tourist souvenirs’ competitive advantage in Egypt. Overall findings highlighted that all the hypotheses were accepted. Limitations: The repercussions of the COVID-19 virus crisis reduced the scope of the study to only tourists in South Sinai and Red sea Governorates; whereas, tourist souvenirs stores were allowed to operate in accordance with the precautionary measures in only three main governorates: the Red Sea, South Sinai, and Marsa Matrouh, in addition to some gift shops in major hotels. Contribution: The study findings provide guidelines for practitioners within the tourist souvenirs and handicrafts sector to undertake the results and adapt them to assess and enhance their performance. Thus, they could improve their competitiveness. Keywords: Tourist souvenirs, Innovative marketing, Competitive advantage
Designing of water distribution system
Authors: Amin Osama Khasraw Mohammed , Akkad Mohammad Zaher , Bányai Tamás
Published: April 2021

Water distribution system (WDS) aims to distribute water from reservoirs or aqueducts to the end-users. This system is part of the water supply network that carries potable water from a central treatment plant or wells to water consumers in order to deliver water sufficiently to meet residential, commercial, industrial, and firefighting requirements. Modern systems aim to solve water distribution systems management problems, such as the lowest cost, and most efficient design by using linear/nonlinear optimization schemes, which are limited by the system size, the number of constraints, and the number of loading conditions. After a literature review for the articles that dealt with this topic, designing two parts of the water distribution system is discussed as a case study in Erbil. Pumps and storage tanks, while optimizing the water distribution system by minimizing the project cost through minimizing the volume of the elevated tank according to the pump working hours.
Design of a robot remote controller for „Magyarok a Marson” competition
Authors: Tóth József
Published: April 2021

This paper is introducing a “Magyarok a Marson” robot, which is developed at the Institute of Automation and Infocommunication in University of Miskolc. The controller was built for “Magyarok a Marson” student competition. Our goal was to create a controller, which looks like a magic wand and it is able to control remotely a spherical robot. It was the expectation of the competition. My main task was the hardware design of the remote controller. This paper presents the requirements of the competition, the development of the PCB panel and the controller itself.
Az MTMI tudományterület iránti érdeklődés változásának vizsgálata digitális tanulási környezetben
Authors: Lengyelné Szilágyi Szilvia , Szepesiné Medve Judit
Published: April 2021

Cikkünkben annak a felmérésnek az eredményeit mutatjuk be, amelyet 2021 februárjában végeztünk 15-16 éves, gimnáziumban tanuló diákok körében a természettudományos tárgyak (matematika, biológia, kémia, fizika) online tanulási-tanítási folyamatának kapcsán a koronavírus járvány második hulláma alatt.
Indukciós hevítés hőmérséklet-idő diagramjai
Authors: Koncsik Zsuzsanna , Fodor Béla , Lukács János
Published: April 2021

Napjainkat a felgyorsult technológiai folyamatok jellemzik. A hőkezelési technológiákban az egyik leghatékonyabb eljárás az indukciós hevítés, amelynek révén a klasszikus edzési-megeresztési folyamat időtartama akár tizedére is csökkenhet. Azonban ezt a felgyorsult folyamatot nehéz a szokásos hőkezelési diagramokkal jellemezni, már csak azon egyszerű tény miatt is, hogy nincs maximális kemence hőmérséklet, hanem csak az indukciós tekercs leadott teljesítménye értelmezhető, amely a hőkezelt alapanyagban meghatározott nagyságú hőt kelt. A hőkezelési diagramok segítségével jellemezhető a kialakuló szövetszerkezet és előre jelezhető a mechanikai viselkedés. Jelen cikkben adott geometriájú alkatrész indukciós hevítése közben mérhető maximális hőmérsékleteket vizsgáljuk, hőkamera segítségével és a hevítési, valamint a hűlési idők meghatározásával kísérletet teszünk hőmérséklet-idő diagramok felrajzolására.
LLC rezonáns konverter tervezése és szimulálása
Authors: Boros Rafael Ruben
Published: April 2021

A kutatás bemutatja az LLC rezonáns feszültségnövelő konverter tervezését és szimulációját, amelynek a bemenete közvetlenül napelemre, kimenete pedig háromfázisú inverterre csatlakozik. A háromfázisú inverter aszinkron motoros hajtást valósít meg. A konverter kimeneti feszültségét szabályozókör állítja be, ennek a dinamikusságát is vizsgálja a kutatás. A tanulmány röviden ismerteti az LLC konvertert általánosan, kifejti részletesebben a rezonáns elemek értékeinek tervezését, majd a tervezett paraméterek alapján elkészült szimuláció eredményét is. A szimuláció MATLAB alapú grafikus fejlesztőkörnyezetben valósult meg (Simulinkben).
How to prevent damages of transporting pipeline girth welds?
Authors: Dakhel Ahmad Yasser , Lukács János
Published: April 2021

Girth welds of hydro-carbon transporting pipelines play important role of the life and the lifetime, during both the construction and the operation. In consideration of the huge number of girth welds, the highlighted attention to those is worthy and necessary. The aims of the article are twofold: on the one hand, collecting the influencing factors on the failures of girth welds; on the other hand, answering the question assumed in the title of the article: how to prevent damages of transporting pipeline girth welds? The answers build upon the demonstrated influencing factors, using examples, and systematically respond to those.
A diffúziós hidrogéntartalom hegesztett kötésekre gyakorolt hatása
Authors: Kovács Judit , Dakhel Ahmad Yasser , Lukács János
Published: April 2021

A hidrogén okozta repedés, illetve a hidegrepedés egy gyakran előforduló károsodási mechanizmus, ami a fémek és az ötvözetek többségére hatással van. A hidegrepedést számos külső és belső paraméter befolyásolja, így a repedéskialakuláshoz hozzájáruló tényezők meghatározása gyakran nehézségbe ütközik. Jelen áttekintő cikkben, hazai és nemzetközi szakirodalmi források alapján, a hidrogén előfordulását, oldhatóságát, diffúzióját és mennyiségi maghatározásának a lehetőségeit vizsgáljuk, valamint a hidegrepedés mechanizmusát és kialakulásának lehetséges megakadályozási módjait foglaljuk össze.
Test validated 0D/1D engine model of a swinging valve internal combustion engine
Authors: Kovács László , Szabó Szilárd
Published: April 2021

In the quest for reaching ever higher power density of IC engines a much simpler solution has been investigated that allows vehicles to reach a comparable power level with cars equipped with turbo charged engines. The new Swinging Valve (SwV) arrangement enables the unhindered gas exchange process through an engine. In this experiment a flow bench was used to examine a normal poppet valve cylinder head and a cylinder head constructed for the same engine but with Swinging Valves. The flow parameters of the original cylinder head were obtained then the SwV head was investigated in the same way. To examine the practical use of a SwV system a 0D/1D engine simulation had been created, first using the engine with conventional cylinder head. That model had been validated with dynamometer tests. After this stage the results of the Swinging Valve flow measurements were fed in the same 0D/1D engine simulation then the results were compared and examined.
STATUS KESEHATAN GIGI DAN MULUT CALON PENGANTIN WANITA (STUDI KASUS: PUSKESMAS KECAMATAN CIPAYUNG JAKARTA TIMUR)
Authors: Indarto Sigit Nur , Kasihani Ni Nyoman , Widiyastuti Rini , Budiarti Rahaju , Purnama Tedi
Published: April 2021

Latar belakang: Karies gigi merupakan masalah kesehatan gigi dan mulut yang sering dialami oleh hampir seluruh masyarakat di Indonesia. Prevalensi karies gigi nasional 57,8% dengan index DMF-T pada usia 15-34 tahun sebesar 2,40. Salah satu kelompok rentan terhadap karies gigi adalah ibu hamil dan menyusui menyusui. Karies gigi yang yang tidak dirawat akan menyebabkan masalah sistemik selama kehamilan dan dapat menyebabkan kelahiran prematur dan berat bayi rendah. Pelayanan kesehatan bagi calon pengantin merupakan bagian dari pelayanan kesehatan pada masa sebelum hamil, diantaranya pemeriksaan fisik, pemeriksaan laboratorium, pemeriksaan penunjang medis dan pemeriksaan gigi dan mulut. Tujuan: Penelitian ini bertujuan untuk mengetahui gambaran status kesehatan gigi dan mulut calon pengantin wanita di Puskesmas Kecamatan Cipayung Jakarta Timur. Penelitian ini menggunakan metode deskriptif dengn sampel penelitian menggunakan teknik purvosive sampling sebanyak 30 responden. Data yang digunakan yaitu data primer dengan melakukan pemeriksaan gigi pada calon pengantin. Hasil: penelitian menunjukan gambaran status karies gigi didapatkan, DMF-T rata-rata 2,27 dengan status karies yang paling banyak kategori rendah (60%). Seluruh responden melakukan perawatan lanjutan (100%) dengan perawatan gigi yang dilakukan scalling 56,7% dan pemambalan 43,3%.
INDEKS DMF-T DAN PERIODONTITIS PADA PASIEN DI KLINIK PERTAMEDIKA YOS SUDARSO JAKARTA UTARA
Authors: RE Pudentiana Rr , Fadjeri Indrayati , Priharti Dwi , Mariyati Mariyati
Published: April 2021

Latar Belakang: Masalah kesehatan gigi yang banyak diderita masyarakat Indonesia adalah karies gigi dan penyakit periodontal. presentase penduduk yang mempunyai masalah gigi dan mulut meningkat tahun 2013 dari 25,9% menjadi 57,6% di tahun 2018. karies gigi tidak ditangani maka penyakit ini dapat menyebabkan nyeri, penanggalan gigi, infeksi bahkan dapat menyebabkan penyakit periodontal contohnya periodontitis. Tujuan: Tujuan penelitian ini adalah untuk mengetahui gambaran indeks DMF-T dan periodontitis pada pasien di Klinik Pertamedika Yos Sudarso Periode Bulan Januari s/d Maret tahun 2020. Metode: Penelitian ini menggunakan metode deskriptif dengan sampel penelitian menggunakan teknik total sampling sebanyak 61 responden. Data yang digunakan yaitu data sekunder yang diambil dari rekam medis pasien. Hasil: Pasien Klinik Pertamedika Yos Sudarso memiliki rata-rata indeks DMF-T sebesar 6,57 termasuk kriteria tinggi. Untuk kejadian periodontitis diperoleh responden tidak mengalami periodontitis 50,8% dan mengalami periodontitis 49,2%. Perbandingan berdasarkan jenis kelamin diperoleh laki-laki memiliki indeks DMF-T dan kejadian periodontitis lebih tinggi daripada perempuan. Kesimpulan: Pasien Klinik Pertamedika Yos Sudarso memiliki indeks DMF-T kriteria tinggi dan mengalami periodontitis
Síntomas del Trastorno por Déficit de Atención con Hiperactividad en estudiantes de medicina
Authors: Godínez Cabrera Rocío Alejandra , Mack Juan , Moll Christian , Alvarez David , Archila Brenda , Cavaradossi Mario , Domínguez Guillermo , Morales Andrea , Salatino Adrián
Published: April 2021

El trastorno por déficit de atención con hiperactividad (TDAH) es un trastorno del neurodesarrollo que se caracteriza por alteraciones en la atención, impulsividad y sobreactividad motora que conllevan a afectar el rendimiento académico. Objetivo: determinar la presencia de síntomas del Trastorno por Déficit de Atención con Hiperactividad (TDAH) en estudiantes universitarios de primer a tercer año de la Carrera de Médico y Cirujano de la Facultad de Ciencias Médicas de la Universidad San Carlos de Guatemala, durante el año 2020. Material y métodos: estudio descriptivo, transversal, realizado en 382 estudiantes de medicina mediante muestreo aleatorio simple. Se aplicaron las escalas Adult Self-Report Scale (ASRS-v1.1) y Wender Utah Rating Scale (WURS-25) para evaluar la presencia de síntomas de TDAH en la infancia y en la actualidad. Resultados: de la población estudiada (n=366), 14% (n=51) presentó síntomas de TDAH y 6% (n=3), repitencia académica escolar. Conclusión: uno de cada diez estudiantes de la Facultad de Ciencias Médicas presenta síntomas para TDAH, la mayoría comprendía las edades de 17-19 años, cursando segundo año y de sexo femenino. La mayoría de los estudiantes universitarios con síntomas de TDAH ha repetido uno o más años académicos
Blockchain for Waste Management in Smart Cities: A Survey
Authors: Ahmad Raja Wasim , Salah Khaled , Jayaraman Raja , Yaqoob Ibrar , Omar Mohammed
Published: April 2021

Smart cities have the potential to overcome environmental problems caused by improper waste disposal to improve human health, protect the aquatic ecosystem, and reduce air pollution. However, today's systems, approaches, and technologies leveraged for waste management are manual and centralized that make them vulnerable to manipulation and the single point of failure problem. Also, a large portion of the existing waste management systems within smart cities fall short in providing operational transparency, traceability, audit, security, and trusted data provenance features. In this paper, we explore the key role of blockchain technology in managing waste within smart cities as it can offer traceability, immutability, transparency, and audit features in a decentralized, trusted, and secure manner. We discuss the opportunities brought about by blockchain technology in various waste management use cases and application scenarios, including real-time tracing and tracking of waste, reliable channelization and compliance with waste treatment laws, efficient waste resources management, protection of waste management documentation, and fleet management. We introduce a framework that leverages blockchain-based smart contracts to automate the key services in terms of waste management of smart cities. We compare the existing blockchain-based waste management solutions based on important parameters. Furthermore, we present insightful discussions on several ongoing blockchain-based research projects and case studies to highlight the practicability of blockchain in waste management. Finally, we present open challenges that act as future research directions.
La storia di un’epidemia: dall’immaginario sfuggente, all’incertezza del domani
Authors: Nesti Arnaldo
Published: April 2021

A distant pain that suddenly involves us. Covid 19 seemed to be a matter that concerned only China, instead we soon found ourselves counting our dead and dealing with “suspended mourning”, that is, facing death without being able to access the usual system of rituals and symbols that accompany the event. A pandemic, as La Spagnola had been in other periods, puts us in a position of uncertainty, but perhaps it stimulates us to find meekness and be more hospitable. The possibility of being able to become better is the message of hope, as are the flowers that continue to bloom demonstrating the victory of beauty in a time of despair.
Il respiro corto dello Spirito nelle mega-chiese, ai tempi della pandemia
Authors: Pace Enzo
Published: April 2021

What effect has the pandemic on Mega-churches? The forced closure or drastic reduction of those present admitted to religious services has in fact called into question both the regime of truth that many of these churches follow, from the theological and spiritual point of view, and the drama-liturgy of hand-to-hand combat between the transmormative force of the Spirit and the prince of all evils, Satan. In this way, Mega-churches moved from the mass event experienced in large auditoriums to an online service, on a domestic scale, for many anonymous and distant faithful, to which a consoling message can be conveyed in a phase of inconvenience and suffering in their daily life. The epidemic has stolen the scene from the great performers of the Mega-churches and from those who, enthusiastic, took their seats in the stalls or moved freely possessed by spirits waiting to be freed, actively participating in the deliverance’s rite. These faithful, probably, now watching from a distance at home, in front of their computer screen, another scene, less involving and, above all, without the parrhesia of the regime of truth, which materialized in the ritual space. The epidemic represents a double contingency for the Mega-churches: on the one hand, it weakens the theological vision of a God who can do everything and of the Spirit who blows triumphantly and defeats all evil, on the other, it dematerializes the presence of the enemy who becomes invisible and intrusive, no longer physically dominable, from which no charismatic leader is more able to delivere the faithful.
El castillo de la pureza. Concepto de Hogar Mundo y la irrupción de los Nuevos Puritanismos en el contexto de la pandemia de COVID 19
Authors: Gaytán Alcalá Felipe , Bernal Ricardo
Published: April 2021

This text tries to show the emergence of a new social dimension identified as Home-World and how through its New Puritanism linked to the religious sphere gain strength that although they resemble the field of neo-conservatisms, but simultaneously distance themselves from them from the field private. The work takes as a reference what happened in Mexico during the COVID 19 pandemic. Methodologically this is an interpretive exercise of a social representation of both the Home-World and what we identify here as New Puritanism based on data, information and events that allow outline this sociological reality.
Cristianismo y pandemia en Argentina. Notas sobre la secularización del discurso religioso
Authors: Mauro Diego , Fabris Mariano
Published: April 2021

The article analyzes the discourse of religious specialists on the pandemic. Throughout the essay we offer some provisional answers based on what happened in Argentina with the authorities of the Catholic Church and the associations of evangelical churches. We defend the hypothesis that the discourse of these religious actors about the pandemic had a low level of enchantment. We also affirm that it was based on a secularized view of society, health and politics, devoid of apocalyptic and conspiratorial perspectives. On the other hand, we affirm that two moments can be demarcated. In the first months, Christian religious institutions supported the government’s health measures. However, in the following months, critical voices emerged demanding more attention to religion in public policy.
Comunità da remoto. Il laboratorio della diaspora cristiano-ortodossa davanti alla pandemia
Authors: Carnevale Davide Nicola , Girneata Simona Fabiola
Published: April 2021

This paper pledges to illustrate and analyse the practices and measures that Eastern European Orthodox Christian communities in the diaspora implemented in response to the global phenomenon of the SARS-CoV-2 epidemic. A comparative study of two different West-European communities, in Italy and France, will be attempted through the tools of multi-sited participant observation. We will illustrate the alternative forms of reaction and re-aggregation implemented by the faithful and their priests by putting them in communication with the two local contexts, and with the overall dynamics that have affected contemporary Orthodoxy. Observation will therefore offer fruitful opportunities to investigate the semantic variations with which Orthodox communities translate the debate between tecno-scientific measures and religious dogmas, and between civil and religious authorities, in a scenario in which orthodox migrants are protagonists of both a growing religious transnationalization, and a new everyday life regulated by epidemic risk and physical and social distancing. We will therefore focus on the production from below of new practices, which have readjusted the community belonging and the adherence to dogmas and traditional rituality, both central in Orthodox Christianity, to the current condition.
Pemeriksaan Ultrasonografi dan CT-Scan untuk Diagnosis Apendisitis Akut pada Anak
Authors: Susanto Suryadi
Published: April 2021

Apendisitis akut merupakan suatu keadaan tersering yang memerlukan tindakan bedah pada anak. Ketepatan untuk menentukan diagnosis dan intervensi bedah berhubungan erat dengan luaran akhir. Diagnosis apendisitis akut dengan keluhan yang tidak spesifik sering membingungkan. Pendekatan diagnosis seperti anamnesis, pemeriksaan fisik, dan pemeriksaan laboratorium rutin tidak selalu akurat. Pemeriksaan diagnostik pencitraan seperti ultrasonografi (USG) dan computed tomography scan (CT-scan) sering digunakan untuk membantu menegakkan diagnosis. Tujuan pemeriksaan pencitraan untuk mengkonfirmasi atau menyingkirkan diagnosis apendisitis akut serta menentukan apendisitis tanpa atau dengan komplikasi. Keterlambatan menentukan diagnosis berhubungan erat dengan meningkatnya angka kesakitan, angka kematian, dan biaya perawatan. Komplikasi dapat berupa perforasi, abses abdominal, atau kematian. Perforasi umumnya terjadi pada usia anak dan remaja dengan angka kejadian berkisar 17-40%. Secara umum angka kematian akibat apendisitis kurang dari 1% dan meningkat 5-15% pada anak dan remaja. Pemeriksaan USG memiliki sensitivitas dan spesifisitas yang sama baiknya dengan pemeriksaan CT-scan.
Effects of Omega-3 Polyunsaturated Fatty Acids to The Serum Level of Interleukin-8, Percentage of Forced Expiratory Volume in 1 Second (%FEV1), and COPD Assesment Test Scores in Stable COPD Patients
Authors: Angriani Nisfi , Suradi Suradi , Subagio Yusup
Published: April 2021

Backgorund: Cigarette smoke inhalation and the other exposure can cause of airway inflammatory and it was the most cause of chronic obstruction pulmonary desease (COPD) pathogenesis. The airway inflammatory will release cytokines proinflammation, one of them was interleukin (IL)-8. Omega-3 polyunsaturated fatty acids (PUFA) have anti-inflammatory effect and its can decrease cytokines production in COPD pathogenesis.

Methods: This study aimed to analyze effects of omega 3 PUFAs on serum IL-8, %FEV1, and CAT score in stable COPD patients. Clinical trials of experimental with pretest and posttest designs were conducted of 32 stable COPD patients came to clinic in Dr. Moewardi Hospital Surakarta from December 2016 until February 2017. Samples were taken by consecutive sampling. Subjects were divided into two groups include the treatment group (n=16) received standard COPD therapy omega 3 PUFA 600mg/day and the control group (n=16) received only standard COPD therapy for 28 days.

Results: There were significant difference (P=0.0001) towards decreased of serum IL-8 between treatment group (-3.56+5.32pg/ml) and control group (8.90+9.98pg/ml), increase difference were no significantly of %VEP1 value (P=0.473) between treatment group (7.02+7.17pg/ml) and control group (5.32+5.97pg/ml), decrease difference of CAT scores significantly (P=0.0001) between treatment group (-16.13+3.03pg/ml) and control group (-4.75+4.17pg/ml).

Conclusions: Omega-3 PUFA may decrease airway inflammation with decrease serum IL-8 level significantly, increase of %FEV1 no significantly and improve the clinical symptoms of stable COPD by decreased CAT scores significantly in stable COPD patients. (J Respir Indo. 2017; 37(4): 265-77)
Effects of Lower Limb Endurance Training on Maximal Oxygen Uptake (VO2 max) in Chronic Obstructive Pulmonary Disease
Authors: Pradana Andika , Tarigan Amira P , Mediyanti Tari , Mutiara Erna , Pandia Pandiaman
Published: April 2021

Background: Patients with COPD exhibit muscle atrophy and dysfunction which lead into decondition state. This will in turn decrease maximal oxygen uptake (VO2 max) in tissues. Considered as the best predictor of cardiorespiratory endurance and survival, VO2max can be attenuated by aerobic training. This study aimed to assess the effects of lower-limb endurance training on VO2 max in COPD patient.

Methods: An experimental study was conducted on 20 COPD patients in group C and D in June–July 2017 at USU Hospital. Patients were prescribed lower-limb exercise by stationary cycling with individualized dose, twice a week for 4 weeks, ranging from 5-20 minutes/session. VO2 max measurement was calculated pre-and post-intervention using Nury’s Formula specifically designed for Indonesian (r=0,68; P