bluuebunny/crossref_metadata_2025 huggingface dataset:
AVALIAÇÃO DA APRENDIZAGEM NA ABORDAGEM TEMÁTICA: UM OLHAR PARA OS TRÊS MOMENTOS PEDAGÓGICOS
Authors: Klein Sabrina Gabriela , Pereira Diuliana Nadalon , Muenchen Cristiane
Published: May 2021

A avaliação escolar, historicamente, é marcada pela lógica do controle técnico, baseada em mecanismos autoritários, por isso, romper com essa tradição é um desafio. Todavia, a perspectiva de reestruturação curricular da Abordagem Temática tem se apresentado como possibilidade para repensar a avaliação escolar, visto que é pautada em uma concepção de educação libertadora. Em articulação a essa perspectiva, os Três Momentos Pedagógicos vêm sendo utilizados nos contextos educativos e, neste sentido, este trabalho investiga de que maneira as teses e dissertações brasileiras vêm compreendendo e desenvolvendo seus processos avaliativos, baseados nos Três Momentos Pedagógicos articulados à Abordagem Temática.  Por meio de um processo de Análise Textual Discursiva, percebeu-se os Três Momentos Pedagógicos como uma possibilidade de avaliação, com características de uma avaliação emancipatória, pois é dialógica, problematizadora, crítica e possui função diagnóstica com o intuito de replanejamento da ação educativa. Além disso, evidenciou-se o potencial de avaliação processual que ocorre em todos os momentos do seu desenvolvimento, não estando reduzido ao último momento pedagógico.
AÇÕES DOCENTES EM AULAS EXPOSITIVAS DIALOGADAS DE QUÍMICA NO ENSINO MÉDIO
Authors: Borges Larissa Caroline da Silva , Broietti Fabiele Cristiane Dias , Arruda Sergio De Mello
Published: May 2021

Neste artigo apresenta-se um estudo das ações docentes em aulas de Química no Ensino Médio. O objetivo da pesquisa foi identificar e descrever as ações docentes, buscando responder às seguintes questões de investigação: O que os professores fazem, de fato, em aulas de Química no Ensino Médio? E quais categorias podem descrever suas ações? Para isso, os procedimentos metodológicos adotados foram gravações em áudio e em vídeo, e anotações em um caderno de campo das aulas de dois professores de Química, denominados P1 e P2, que atuam no Ensino Médio em escolas públicas. Como metodologia de análise e de interpretação das informações obtidas, utilizou-se a Análise de Conteúdo, considerando as etapas de pré-análise, de exploração do material e de tratamento dos resultados. Com relação aos resultados, para as aulas expositivas dialogadas com resolução de exercícios, foram identificadas 12 categorias de ação docente para P1 (Explica; Pergunta; Escreve; Atividades Burocrático-Avaliativas; Espera; Distribui; Responde; Representa; Informa; Adverte; Organiza; e Retoma) e 13 categorias para P2 (Explica; Pergunta; Escreve; Representa; Espera; Lê; Atividades Burocrático-Avaliativas; Atividades Burocrático-Administrativas; Responde; Adverte; Organiza; Retoma; e Cumprimenta), sendo que para ambos, as ações com maior incidência foram Explica-Pergunta-Escreve, sugerindo um modelo de aula caracterizado como Exp-Per-Esc, relacionado à abordagem e ao tipo de recurso utilizado. A partir das categorias de ação evidenciadas, realizamos um movimento de apresentação dos dados por meio de modelos gráficos que expressam uma representação temporal da aula e sugerem um entrelaçamento existente entre as ações identificadas.
PROMOVER O PENSAMENTO CRÍTICO E CRIATIVO NO ENSINO DAS CIÊNCIAS: PROPOSTAS DIDÁTICAS E SEUS CONTRIBUTOS EM ALUNOS PORTUGUESES
Authors: Tenreiro-Vieira Celina , Vieira Rui M.
Published: May 2021

A sociedade contemporânea evidencia diversos avanços científicos e tecnológicos que têm contribuído para a melhoria da qualidade de vida de seres humanos. Todavia, tem também acentuado problemas e assimetrias entre os mesmos, como a escassez de água potável e de produção alimentar, o acesso a cuidados de saúde e a desinformação. O ensino das ciências necessita, pois, de ser repensado de modo a responder eficazmente a estes complexos desafios. Nesse sentido, uma das exigências e radica na necessidade de se centrar o curículo, os programas e as práticas de ensino no âmbito de todas as disciplinas em áreas de competências, como as de pensamento crítico e criativo (PCC). Uma das formas de o conseguir é investindo no desenvolvimento de propostas didáticas para os alunos vivenciarem a participação cidadã responsável, mobilizando explicitamente o PCC. Neste quadro, realizou-se um estudo com o propósito de elaborar, implementar e avaliar propostas didáticos com foco no PCC, para o ensino das ciências com alunos dos 8 aos 12 anos. Decorrente disso, a questão de investigação norteadora do estudo foi: “As propostas didáticas elaboradas e implementadas contribuem para a melhoria do PCC dos alunos envolvidos”? O estudo seguiu uma natureza mista, por um lado, com um planeamento de Investigação-ação para o desenvolvimento de propostas didáticas e, por outro, um design pré-teste e pós-teste com seleção não aleatória dos sujeitos. Os resultados obtidos suportam a conclusão de que as propostas didáticas elaboradas e implementadas promoveram estes tipos de pensamento dos alunos envolvidos. Estas propostas relevam-se, pois, de amplo potencial, no contexto do ensino das ciências, para alunos destes níveis etários, dadas as temáticas transversais em que se centraram. Afiguram-se também como exemplos a serem usados na formação de professores, de modo a desenvolverem práticas que promovam explícita e intencionalmente estes dois tipos de pensamento.
ANÁLISE PSICOMÉTRICA DAS ESTRATÉGIAS DE ESTUDO E APRENDIZAGEM EM IMUNOLOGIA
Authors: Silva Jean Carlos Souza , Falcão Dayseanne Araujo , Dantas Iron Macêdo
Published: May 2021

A falta de estratégias de aprendizagem e estudo é um dos motivos mais importantes de frustração e fracasso escolar do aluno, portanto, as estratégias de aprendizagem e estudo assemelham-se a uma ferramenta aplicada na resolução de problemas acadêmicos, auxiliando o aluno a desenvolver as competências exigidas em seu curso acadêmico. Identificar e potencializar essas estratégias ajuda o sujeito a ter sucesso na educação universitária dependendo de suas próprias capacidades, descobrindo-as e fortalecendo-as. Pensando nesta meta, estabeleceu-se um processo investigativo acerca das estratégias de estudo e aprendizagem dos alunos matriculados na disciplina de Imunologia, tendo em vista os desafios enfrentados pelos docentes de disciplinas na área biomédica. O método de escolha para o levantamento foi a aplicação para os alunos da versão validada para o Brasil do Learning and Study Strategies Inventory – LASSI que possibilita o levantamento de dados estatísticos quantitativos, e consequentemente, o grau e perfil de uso das estratégias de aprendizagem dos discentes selecionados. Foram avaliadas as categorias: processamento da informação, ansiedade, organização de tempo, concentração, atitude, preocupação ao estudar, seleção das ideias principais, auxiliares de estudos, motivação e internet como fonte de estudo. Analisou-se as categorias de formas independentes entre si e em comparação com diferentes subgrupos de alunos, tais como: gênero, execução de atividade remunerada, modalidade de curso e instituição de formação no ensino médio. A pesquisa de caráter exploratório oportunizou o levantamento de dados acerca de um contexto ainda não investigado na área de Ensino de Imunologia. Com este levantamento, foi possível apresentar um panorama do uso de estratégias de estudo e aprendizagem pelos alunos matriculados na disciplina de Imunologia no ano letivo de 2017. Os resultados permitiram a identificação de áreas em que os estudantes apresentam contratempos, dificuldades, perturbações e disfunções na disciplina analisada, tais como: reduzido uso da biblioteca como ferramenta de auxílio nos estudos, dificuldades de organização e administração de tempo, alto grau de ansiedade e tensão. Como resultado da comparação das estratégias utilizadas por diferentes grupos, identificou-se que alunos da modalidade bacharelado são mais hábeis em selecionar as ideias principais e mais motivados; que discentes exercendo atividade remunerada apresentam maior atitude em relação aos estudos. Desse modo, a investigação permitiu a análise dos diversos fatores que podem contribuir com déficits no processo de aprendizagem dos alunos e o direcionamento de possíveis estratégias a serem utilizadas em projetos de intervenção voltados para a facilitação da aprendizagem e construção do conhecimento significativo.
CONHECIMENTO ESPECIALIZADO DE PROFESSORES DE QUÍMICA – CTSK: UMA ANÁLISE DE PRÁTICA DOCENTE NO ENSINO DE HIDROCARBONETOS
Authors: Alves Martins Jakline Estfane , Carbo Leandro , Coelho Soares Susel Taís
Published: May 2021

Na busca de um referencial teórico metodológico, que seja possível descrever os conhecimentos docente necessários para o ensino, diversos modelos surgiram nas últimas décadas para diferentes áreas. Com relação à área da Química, tem-se o modelo do Conhecimento Especializado de Professores de Química - CTSK, que descreve o conjunto de conhecimentos específicos de professores de Química, e permite conectar os conhecimentos da disciplina ao didático. Assim, o objetivo dessa pesquisa foi de caracterizar os conhecimentos mobilizados por uma professora de Química, quando do ensino de hidrocarbonetos, a partir do CTSK. A pesquisa ancora-se na abordagem qualitativa-descritiva de cunho exploratória, e a produção de dados ocorreu mediante o estudo de campo. Os resultados evidenciaram a mobilização de conhecimentos, tanto no domínio Químico (CK) quanto no didático (PCK), conforme o CTSK, e revelou conexões entre ambos os domínios, caracterizando a articulação entre ensino e aprendizagem – elementos essenciais ao sucesso escolar dos estudantes.
DISCUSSÕES SOBRE A EDUCAÇÃO INCLUSIVA NOS ESPAÇOS DOS CURSOS DE FORMAÇÃO INICIAL E CONTINUADA DE PROFESSORES
Authors: Souza Cunha Jáisse Mendes , Silva Pereira Luciano da , Alves Pereira Cláudio
Published: May 2021

O objetivo do artigo é analisar como a temática em tela se desenvolve nos cursos de formação continuada dos professores em duas cidades brasileiras, Cuiabá, no estado de Mato Grosso e Presidente Dutra, na Bahia, assim como identificar se houve, em sua formação inicial, disciplinas que os preparassem para os processos de educação inclusiva e se, no exercício da docência, tais educadores tiveram oportunidades para formações continuadas na área. A metodologia baseou-se na perspectiva da abordagem qualitativa e o principal instrumento de coleta de informações foi um questionário eletrônico disponibilizado no Google Forms. Teoricamente, o artigo se apoia em Diniz (2012), Duek (2014), Pletsch (2009), entre outros. Os resultados apontam que os professores entrevistados reconhecem a importância de discutir a temática da inclusão no ambiente escolar, seja na formação inicial ou continuada e, da mesma forma, reconhecem que muitas ações por parte dos órgãos competentes têm permanecido presentes apenas nos documentos normativos.
Current COVID-19 Pandemic and Medical Education: Medical Students' Perception and Experiences with Online Clinical Teaching and Learning at College of Medicine in Oman
Authors: Jahan Firdous , Siddiqui Muhammad , Al-Asmi Muzna S.R. , Al-Shahi Manar R. S.
Published: May 2021

Background: Clinical teaching is a form of interpersonal communication between a teacher and learner. It mainly involves a patient or a patient scenario; the student learns how to evaluate a patient and manage the problem. The ideal clinical teaching and learning are done in the patient care area, but because of the COVID-19 pandemic outbreak, all clinical and classroom teaching is suspended now.Objective: This study's main purpose was to assess medical students' perceptions and experiences with online clinical teaching and learning.Method: A cross-sectional study was conducted at the College of Medicine and Health Sciences (CoMHS). All students in 6 and 7 years consented to participate in the survey for a self-filled study (google form). Statistical analysis was performed using Statistical Package for Social Sciences (IBM SPSS Statistics 24.0). Data were expressed in frequencies for questionnaire responses calculated for all variables in numbers and percentages. Independent sample t-test was used to compare differences between two groups. Result: Ninety-one students participated in the study, of which 10.2% were male, and 46.2% were Omani citizens. 27.5% of students were 6th year, and 72.5% were 7th-year students. 69.2% of students did not experience any login/registration problem in GoToWebinar most of the time. Table 1 shows the student's responses in this regard. A significant statistical difference (p- <0.001; 95 % CI: 0.34-0.91) was observed between 6th year (mean-2.79±0.62) and 7th year students (mean-2.16±0.51). Conclusion: Medical students have shown a positive attitude and motivation towards webinar clinical teaching. Online webinar teaching can offer more diverse and compelling educational opportunities. Medical students in clinical years are self-directed learners but need in-depth learning with maximum hands-on practice. The Webinar teaches an impact on medical student education, particularly affecting the hands-on approach and training, which is limited and mandatory to become a doctor.
Blood Glucose – Lowering Potentials of Annona muricata Leaf Extract in Alloxan–Induced Diabetic Rats
Authors: Opara P. O. , Enemor V. H. A. , Eneh F. U. , Emengaha F. C.
Published: May 2021

The blood glucose- lowering potentials of ethanol leaf extract of Annona muricata were studied. Thirty wistar albino rats were divided into six groups of five rats per group. Group 1 served as “Normal control” animals and received normal rat pellets and water. Diabetes mellitus was induced in Groups 2, 3, 4, and 5 by intraperitoneal injection of alloxan (130 mg/kg). Group 6 rats were administered with 400 mg/kg daily of the extract without induction; group 3 rats were treated with glibenclamide (5 mg/kg body weight), groups 4 and 5 received 200 mg/kg and 400 mg/kg body weight of A. muricata leaf extract daily respectively throughout the duration of the experiment of 14 days. Group 2 rats were induced but not treated with any drug, thus it served as the “Negative control” group. Quantitative phytochemical analysis of the leaf extract was carried out using the Association of Official Analytical Chemists (AOAC) methods. Acute toxicity test of the leaf extract of A. muricata was determined using 12 rats by Lorke’s toxicity testing method. The blood glucose levels of the animals in each group were determined using Accu-chek test strip method. The weights of the animals were determined using a standard electronic weighing balance. The result of the quantitative phytochemical analysis of the leaf showed that the ethanol leaf extract contains the following: phenols (74 mg/100 g), flavonoids (3.70 mg/100 g), tannins (2.95 mg/100 g), oxalate (6.48 mg/100 g), terpenoid (13.88 mg/100 g), phytates (130 mg/100 g), saponins (6800 mg/100 g), alkaloids (570 mg/100 g), cardiac glycoside (1690 mg/100g). Acute toxicity studies showed that LD50 was 3807.89 mg/kg body weight. The results of the average blood glucose levels (mg/dl) of the rats in each group were group 1, 82.6071±7.7524, group 2, 309.3571±163.6923, group 3, 226.7143±132.8182, group 4, 146.5000±140.1465, group 5, 150.4783±81.8340, and group 6, 83.4643±12.5329 for each group respectively. The average body weights of the rats in each group were group 1, 192.8571±22.5844, group 2, 185.7143±33.6759, group 3, 177.1429±36.67500, group 4, 219.2857±21.2908, group 5, 119.5455±23.5993, and group 6, 191.7857±25.2475. The findings from this study suggest that ethanolic leaf extract of A. muricata has notable effect in lowering blood glucose levels in diabetic rats and is a more potent drug in the treatment and management of diabetes mellitus and oxidative stress- related diseases.
Estimation of a Planetary Gear Mesh Stiffness: An Approach Based on Minimising Error Function
Authors: Olanipekun K. A.
Published: May 2021

The mesh stiffness of gear teeth is one of the major sources of excitation in gear systems. Many analytical and finite element methods have been proposed in order to determine the mesh stiffness of gears especially parallel axis spur gears. Most of these methods are not trivial because they involve complicated analyses which incorporate parameters like gear tooth error, gear spalling sizes and shapes, nonlinear contact stiffness and sliding friction before mesh stiffness can be determined. In this work, a method is proposed to determine the sun-planet and ring-planet mesh stiffnesses of a planetary gear system. This approach involves fitting a relationship between the measured natural frequencies from an experimental modal test and natural frequencies predicted using an analytical model of a planetary gear. This method is relatively easier compared to the existing methods which involve complicated analyses. For this study, the average mesh stiffness estimated is 12.5 MN/m.
Thermal-Hydraulic Performance Analysis by Means of Rectangular Winglet Vortex Generators in a Channel: An Experimental Study
Authors: Heriyani Oktarina , Djaeni Mohamad , Syaiful .
Published: May 2021

Vortex generators (VGs) are one of the effective passive models used to increase the heat transfer rate in heat exchangers. In this experiment, heat transfer from six cylinders heated to the airflow was improved by attaching rectangular winglet vortex generators (RWVGs) to a plate in a rectangular channel. The installation aimed to increase the value of the thermal-hydraulic performance evaluation criteria in the line. This experimental study was carried out by varying the fluid flow velocity from 0.4 m/s to 2 m/s with an interval of 0.2 m/s in the channel. Three pairs of VGs were arranged in both in-line and staggered configurations. The experimental results show that the thermal-hydraulic performance evaluation criteria for three pairs of vortex generators in the staggered configuration was 15.17% higher than the baseline, while the thermal-hydraulic performance of the in-line arrangement was 1.54% higher than the staggered one.
Allocation Problems, by the Method of Alternative Representation of the Inverse Set, for Values of Cooperative TU Games
Authors: Dragan Irinel
Published: May 2021

In earlier works, we introduced the Inverse Problem, relative to the Shapley Value, as follows: for a given n-dimensional vector L, find out the transferable utilities’ games , such that  The same problem has been discussed further for Semivalues. A connected problem has been considered more recently: find out TU-games for which the Shapley Value equals L, and this value is coalitional rational, that is belongs to the Core of the game . Then, the same problem was discussed for other two linear values: the Egalitarian Allocation and the Egalitarian Nonseparable Contribution, even though these are not Semivalues. To solve such problems, we tried to find a solution in the family of so called Almost Null Games of the Inverse Set, relative to the Shapley Value, by imposing to games in the family, the coalitional rationality conditions.

In the present paper, we use the same idea, but a new tool, an Alternative Representation of Semivalues. To get such a representation, the definition of the Binomial Semivalues due to A. Puente was extended to all Semivalues. Then, we looked for a coalitional rational solution in the Family of Almost Null games of the Inverse Set, relative to the Shapley Value.

In each case, such games depend on a unique parameter, so that the coalitional rationality will be expressed by a simple inequality, determined by a number, the coalitional rationality threshold. The relationships between the three numbers corresponding to the above three efficient values have been found. Some numerical examples of the method are given.
Modelling of Harmonic Response of Scarf Adhesive Joints
Authors: Alqahtani Awad A. , Almitani Khalid H. , Othman Ramzi
Published: May 2021

Adhesives are used for attaching structures to various spacers such as tubular and scarf joints to replace the traditional joining methods of welding, brazing, soldering, etc. Many of the unique features associated with adhesives are low manufacturing cost, long component life, and lightweight. Accordingly, a considerable amount of study has been carried out and is still underway to develop. The main objective of this study is to investigate the response of the scarf joints when exposed to a harmonic load. The finite element method (FEM) using ANSYS is availed to study and analysis the natural frequencies, mode shape, and frequency response. Additionally, the influence of the adhesion angle is examined.
Quality Evaluation of Dried Fermented Locust Bean and Soybean Condiments
Authors: Tersoo-Abiem Evelyn Mnguchivir , Sule Stephen , Iwuamadi Izuchukwu , Awulu Esther Obiye
Published: May 2021

The study was carried out in order to establish the suitability of fermented soybean condiment as an alternative to fermented locust bean condiment in meal preparations. The dried fermented condiments were subjected to chemical, microbial and sensory evaluation using standard methods. Results revealed significantly (p<0.05) higher protein (54.06%), ash (6.21%), crude fat (14.15%) and pH (8.90) content in fermented soybean condiment. Higher values of 44.72 mg/100 g, 20.06 mg/100 g, 612.40 mg/100 g and 164.34 mg / 100 g were also observed in fermented soybean condiment with respect to iron, magnesium, potassium, and calcium respectively. Furthermore, fermented soybean condiment revealed significantly (p<0.05) higher vitamin content of 647.62 UI/100 g, 0.047 mg/100 g and 0.030 mg/100 g for pro-vitamin A (β-Carotene), vitamins B1 and B2 respectively. Microbiologically, total plate count of 1.7×105 CFU/g and 1.4×105 CFU/g were observed for fermented soybean and locust bean condiments respectively. There was however no fungal growth observed in both condiments. Isolation and characterization of bacteria isolates revealed Bacillus subtilis as the common microorganism in both condiments. Bacillus licheniformis was predominant in locust bean condiment, while Bacillus pumilus was more in soybean condiment. With the exception of appearance, there was no significant difference (p>0.05) between the condiments in terms of their sensory attributes. Sensory scores for fermented soybean condiment were however higher than that of fermented African locust bean. From this study, soybean condiment may be a suitable substitute to locust bean (Parkia biglobosa) condiment, following the gradual extinction of the plant.
Momentum Concept Learning using Tracker as a Virtual Experiment Model: Looking at Students’ Learning Independence
Authors: Subali Bambang , Ulqia Nindy , Ellianawati Ellianawati , Siswanto Siswanto
Published: May 2021

Visualization of physical phenomena through modeling and virtual experiment help students to understand the physics concepts. The concept of momentum is quite challenging to explain without the help of virtual experiments.This study aimed to analyze students' independent learning after conducting the learning process on the concept of momentum using Tracker software as a virtual experimental model. This study was quasi-experimentalwith the purposive sampling technique to determine the control class and the experimentalclass. There were 42 students involved in this research. The control class was treated by actual experiments on learning, while the experimental class used the Tracker software as a virtual experiment model. The instrument used was questionnaires given at the end of learningto measurestudents’ learning independence. The data were analyzed by using the descriptive statistics method. Learning independence in the control class obtained 51.31% in the medium category, and the experimental class obtained 60.95% in the medium category. Although the average achievement was not significantly different, the aspects of responsibility, motivation, and self-evaluation of the experimental classwere better than that of the control class.
Trending Research Topics in the Field of Physics Education from 2017 to 2019 in Highly Reputable International Journals
Authors: Bancong Hartono , Nurazmi Nurazmi , Fiskawarni Tri Hastiti , Park Jisun
Published: May 2021

This study aims to map the physics education research topics trending in the last three years in highly reputable international journals. This is a descriptive study that analyzed 511 articles using content analysis. All articles were selected from the top 3 academic journals: International Journal of Science Education (IJSE), Research in Science Education (RISE), and Science Education (SE). All three journals have JSRs above 0.8 with a quartile of Q1. Data collection and analysis were carried out from April to September 2020. The results showed that the top research topics in the IJSE journal were science learning: contexts, characteristics, and interactions with a percentage of 15.05%. Likewise, in the RISE journal, the topics of science learning: contexts, characteristics, and interactions also ranked first with a percentage of 16.30%. Meanwhile, the top research topics in the SE journal were STEM/STEAM, with a percentage of 13.28%. Based on the results, it can be concluded that overall, the top three research topics highlighted by physics researchers in highly reputable international journals from 2017 to 2019 period were science learning: contexts, characteristics and interactions, STEM/STEAM, and curriculum and assessment.
Implementation of Interactive Conceptual Instruction (ICI) With Computer Simulation: Impact of Students’ Misconceptions on Momentum and Impulse Material
Authors: Kaniawati Ida , Danawan Agus , Suyana Iyon , Samsudin Achmad , Suhendi Endi
Published: May 2021

Misconceptions frequently occur in various physics concepts, including momentum and impulse. Misconceptions in students must be addressed since they can hinder the learning process. This study aimed at investigating students' misconceptions on momentum and impulse material after implementing Interactive Conceptual Instruction (ICI) with computer simulations. The method employed in this study was a quasi-experimental design with One Group Pretest-Posttest Design. This research was conducted on 30 students of the tenth grade determined by the purposive sampling technique. Fifteen four-tier test items were used as the research instrument. The N-gain analysis was performed to know the reduction of misconceptions. The results showed that the N-gain value obtained was 0.46 with moderate interpretation, meaning that Interactive Conceptual Instruction (ICI) aided with computer simulations could reduce student misconceptions. The results also indicated that the misconception after treatment was smaller than before treatment. This phenomenon can be seen from the reduction of misconceptions by 11.6% after implementing Interactive Conceptual Instruction (ICI) with computer simulations. Therefore, it can be concluded that the Interactive Conceptual Instruction (ICI) with computer simulations can facilitate students in the learning process so that misconceptions can be reduced.
Analysis of Banana Leaves as Noise Reducing Media With Addition of Zalacca Plam Peel
Authors: Irmadona Irmadona , Marbun Elwy Asrianto , Ilmi Lubis Aisyah Nurul , Luthan Putri Lynna A.
Published: May 2021

At present there are very many sound absorbers developed with modifications from various simple materials available. A comparative study and analysis of banana midribs as a sound dampening medium has been tested by several other researchers, but not with the addition of zalacca bark. This research was continued to find out whether salak skin would reduce the sound. In this study carried out by the method of making banana midrib fiber, salak skin carbonization, composite fabrication and specimen testing. The specimens used is 30x30 cm. This composite consists of polyester resin as a matrix, banana midrib fiber and salak skin as a pore enhancer with a ratio of 5: 1. The results of the data from this analysis are that the sound can be muted by a composite that has been tested with a specimen test of 6 dB; 8.3 dB; 16.8 dB; 16.9 dB; 14 dB.
Derivatisation of 2,4 (dinitrophenyl hydrazine) DNPH in Canola oil oxidation
Authors: Damanik Marini , Murkovic Michael
Published: May 2021

Lipid oxidation during heating started at the allylic position of the double bond of unsaturated fatty acids. Primary lipid oxidation which was produced during heating are generally unstable and directly decompose into secondary oxidation products. The oxidative and thermal  stability  of Rapeseed  oil was  evaluated using Rancimat 679. Oil samples were heated at 120oC for 10 hours which  are taken started from 5, 6, 6.5, 7, 7.5, 8, 9 and 10 hours. Derivatization with DNPH eluted with a mixture of methanol (60%) and water (40%). The aldehydes are analysed by High Performance Liquid Chromatography- Diode Array Detection (HPLC-DAD) after derivatisation with DNPH and identified by high-resolution MS using an orbitrap-based mass spectrometer. HPLC is the suitable method to investigate the non-volatile aldehydes formed by decomposition of hydroperoxides.  The result of this oxidation process were described that the maximum point of the oil oxidation was at 9 hours which peak area 378. For oxidation process at the 10 hours the area peak is decreased which point 344.
Potential of Bio-briquette of Pineapple Crown Waste (Ananas comosus (L.) merr
Authors: Addina Kurnia Nur , Lazulva Lazulva
Published: May 2021

This study aims to determine the potential of pineapple crown waste to be used as natural fuel in the form of biobriquettes, The research method used in this study is an experimental method. The research carried out in several stages, namely collection of raw materials, dehydration of raw materials, carbonization, crushing and screening, mixing binder, molding and compressing, drying and briquettes quality determining. The research findings showed that the bio-briquette quality of pineapple crown was 5.2-2.2% based on water content test, kabout 200-150 minutes, heating a liter water wiyh 200 grams bio-briquette was 23-15 minutes. All results of bio-briquette quality test of pineapple crown passed the SNI 06-3730-1995.
Electricity Production From Peat Water Uses Microbial Fuel Cells Technology
Authors: Utami Lisa , Lazulva Lazulva , Fatisa Yuni
Published: May 2021

This study aims to study how the potential of peat water as a source of electrical energy using Microbial Fuel Cell (MFC) technology. Observations were made on two chamber vessel reactors (anodes and cathodes) and connected to electrochemical cell circuits (voltaic cells) and voltage values were measured, current, power density generated from the circuit for 9 days.The results of the measurement of the maximum voltage value, the maximum current generated and the maximum power density (8th day) of the reactor are obtained as follows: 50.8 mV, 1 µA and 3.64 x 10-2 mW / m2
Where Anti-Corruption Education Need To Be Started
Authors: Heryadi Adi , Evianawati Evianawati , Atmaningrum Agustin
Published: May 2021

This descriptive research with the survey method aims to determine the level of knowledge and understanding of junior high school students in Sleman, DIY on corruption, and the Corruption Eradication Commission (KPK). The cluster sampling technique was used to obtain data from a total of 20,748 students from 137 junior high schools in Sleman Regency in 2017, through a questionnaire consisted of 10 answer choices. This research was conducted from 21 May to 21 August 2017 and analyzed with the SPSS version 16 with a 95% level of confidence and a margin error of 1.86%.The data collected was descriptive, therefore, it does not need further explanation or test hypotheses (Azwar, 2015). The results of this study are used to determine the intervention steps that need to be taken in anti-corruption campaigns in the millennial generation.
desain mesin burner oven tembakau dengan bakar biomassa wood pellet
Authors: Prasetyo Yodi
Published: May 2021

ABSTRAKPenelitian ini bertujuan untuk mendesain mesin burner oven tembakau dengan bahan bakar biomassa wood pellet. Metode desain diawali dengan proses kajian pustaka, desain mesin dan simulasi mesin. Tahap awal mendesain mesin burner yg dibutuhkan untuk oven tembakau mencari kalor tembakau untuk proses pengeringan, sehingga dapat menentukan energi wood pellet yg dibutuhkan, Menghitung jumlah udara untuk proses pembakaran. Selanjutnya menghitung jumlah bahan bakar wood pellet untuk menentukan dimensi ruang bakar dan dimensi screw conveyor. Hasil desain adalah energi untuk mengeringkan 30kg tembakau sebesar 4.395,3kj dan dibutuhkan total energi panas wood pellet 6.670 kj. Udara yg diperlukan untuk pembakaran sebesar 1,078 m3/jam. Sehingga didapat dimensi ruang bakar berdiameter : 105 mm  dan panjang : 180mm. bahan bakar wood pellet yg digunakan sebanyak 0,748kg atau 800gram untuk mengeringkan 30kg tembakau. Simulasi frame diberikan beban sebesar 196,1N. hasil simulasi tegangan equivalent maksimum terjadi dibagian belakang burner sebesar 0,1101Mpa. setelah itu didapat tegangan minimum equivalent sebesar 0Mpa.      Kata kunci : burner, biomassa, pembakaran.
Pembuatan Sepeda Kargo Lipat Minimalis
Authors: Widyanto Bagas
Published: May 2021

Beberapa negara maju sudah mulai mengembangkan suatu teknologi berupa alat/kendaraan yang diciptakan untuk efisiensi waktu.Kendaraan ini akan mempersingkat waktu jarak tempuh yang diperlukan saat melakukan perpindahan dari suatu tempat ke tempat lainnya, yang jika ditempuh dengan jalan kaki akan memakan waktu yang lama. Tujuan penelitian ini adalah untuk membuat sepeda kargo minimalis  folding bike sehingga dapat dilipat mempermudah pengguna dengan sesuai kebutuhan dan dapat disimpan diruang terbatas.Metode dalam pembuatan sepeda kargo minimalis folding bike ini di awali dengan proses perancanaan, pembuatan dan pengujian. Tahap awal pembuatan speda kargo ini mulai dari gambar kerja, pemotongan bahan sesuai gambr kerja, pengeboran, pengelasan, perakitan finishing, anilis biaya dan selanjutnya dilakukan uji fungsional untuk memastikan apakah pembuatan speda kargo minimalis folding bike dan berfungsi dengan baik atau tidak.Hasil yang dicapai adalah membuat sepeda kargo minimalis foldig bike dapat memabwa beban dengan kapasitas  untuk beban pengemudi maksimal mencapai beban 80kg dan beban untuk kargo maksimal mencapai beban 40 kg. Jadi total keseluruhan bebannya adalah 120 kg dan dapat melaju dengan kecepatan rata-rata 20 km/jam Kata Kunci : Sepeda kargo minimalis, folding bike, beban 120kg.
Desain dan simulasi mesin sortir biji kopi kering dengan sistem gerakan engkol
Authors: Fatih Ahmad
Published: May 2021

Biji kopi yang diolah oleh home industri masih banyak yang belum memiliki mesin pengayak biji kopi, dan produk yang dihasilkan masih banyak ukuran yang belum memenuhi standar, sehingga daya jual biji kopi murah.Untuk mengatasi masalah tersebut akan dirancang mesin pengayak biji kopi dengan skala home industri 300 kg / jam. Penelitian ini bertujuan mendesain dan mensimulasikan mesin sortir biji kopi agar dapat memisahkan ukuran biji kopi yang memenuhi standar, sehingga dapat menghasilkan biji kopi konsumsi dengan ukuran yang memenuhi SNI biji kopi konsumsi, mesin sortir ini khusus digunakan untuk biji kopi jenis robusta. Desain alat menggunakan 3 buah wadah alumunium yang disusun secara bertingkat. Setiap wadah memiliki lubang-lubang dengan diameter yang berbeda yaitu 7 mm, 5 mm, dan 3 mm. dan di harapkan mesin ini mampu mensortir 300kg/jam. Kata kunci: Desain mesin sortir, biji kopi kering, kopi robusta
Desain dan simulasi mesin perajang cengkeh dengan pisau putar
Authors: Ulwi Sarwan
Published: May 2021

Desain mesin perajang cengkeh guna untuk menyederhanakan peralatan mesin produksi, dikenal dengan istilah teknologi tepat guna. Sering sekali perajangan cengkeh dilakukan secara manual, yaitu dengan tenaga manusia. Penelitian ini bertujuan mendesain dan mensimulasikanmesin perajang cengkeh dengan kapasitas 50 Kg/jam dengan bantuan pendorong menggunakan sistem pneumatik dan menghasilkan rajangan cengkeh dengan ukuran 0,1 – 0,2 mm, Metode perancangan yang dilakukan adalah observasi lapangan,studi leteratur,analisa kebutuhan mesin perajang,konsep desain mesin perajang,prinsip kerja,keunggulan,kelemahan,perhitungan dan mensimulasikan kekuatan rangka pada mesin perajang menggunakan software inventor 2019.Hasil penelitian ini adalah desain mesin perajang cengkeh yang mampu menghasilkan rajangan cengkeh yang baik beserta mampu merajang dengan kapasitas 50kg/jam yang dapat diproses dalam waktu 1 jam. Dimensi mesin panjang 120 cm,lebar 50cm serta menggunakan penggerak motor listrik 1,09 Hp dan  dari hasil perhitungan secara teoritis tegangan von mises pada rangka mesin perajang cengkeh sebesar 46,89 dan secara simulasi tegangan von mises sebesar 49,05 jadi selisish antara perhitungan teoritis dan simulasi  sebesar 4,40 % Kata Kunci: Cengkeh, Perajang Cengkeh, pisau putar
RANCANG BANGUN SISTEM KONTROL SUHU PADA MESIN OVEN KOPI TRAY ROTARY BERBASIS ARDUINO
Authors: Hardiyansyah Muhammad Vikih
Published: May 2021

Kopi merupakan salah satu minuman yang paling umum, termasuk minuman yang paling banyak diminum di dunia. Proses pengeringan biasanya masih menggunakan cara manual. Untuk meningkatkan efisiensi mesin oven kopi harus dilengkapi dengan sistem pengatur suhu, sehingga diharapkan proses oven dapat selesai dengan cepat dan pengurangan kadar air pada kopi dapat merata. Penelitian ini bertujuan untuk merancang dan membuat sistem kendali suhu pada mesin kopi untuk mengurangi kadar air.Metode penelitian yang digunakan adalah merancang dan menguji dari analisis kebutuhan sistem kendali, perancangan, perancangan sistem kendali suhu, perancangan perangkat keras, dan perangkat lunak. Analisis desain. Untuk menstabilkan suhu di dalam oven pada kisaran suhu 46 ° -52 ° C.Hasil dari penelitian pada sistem kontrol ini adalah untuk membuat sistem kontrol suhu dengan tujuan mengurangi kadar air pada biji kopidengan cara proses oven berbasis mikrokontroler arduino dan menggunakan sensor suhu DS18B20.
DESAIN DAN IMPLEMENTASI SISTEM KONTROL PUTARAN MOTOR PADA MESIN CNC LASER DENGAN KONTROL PID
Authors: Tunggal Baghazt Kumara
Published: May 2021

Sistem kontrol ini bertujuan untuk menghasilkan sistem kendali kecepatan putar motor pada mesin cnc laser cutting sehingga dapat meningkatkan kinerja dari mesin laser ini dan mendapatkan konfigurasi pemotongan yang tepat untuk material akrilik. Metode penelitian yang digunakan adalah dengan menggunakan modul CNC Shield dan Arduino sebagai sistem kendali untuk menguji dan membangun mesin. Proses simulasi, menggunakan software Inskcape untuk mendesain pola atau gambar. Proses verifikasi merupakan proses membandingkan data yang dikonversi dari citra ke bahasa G-code dengan data dokumen.Melalui penelitian ini telah di rancang dan dibuat sistem kontrol kecepatan gerak motor stepper pada mesin CNC laser dengan menggunakan sistem kontrol PID ddengan nilai P = 85,7095 , I = 8786,01 , D = 0,2090 hasil pengujian menunjukkan putaran motor motor stepper menunjukkan kecepatan motor 200 rpm dan didapatkan akurasi putaran motor 200,25 rpm.Kata kunci : G-code, arduino mikrokontroler, PID
Prone Position Improve Physiological Parameters of Preterm Infants Weaning from CPAP: A Randomized Control Trial
Authors: Simorangkir Ayu Ferissa , Rustina Yeni , Efendi Defi
Published: May 2021

The need for continuous positive airway pressure (CPAP) was vital for preterm infant with respiratory distress, but the impact of long-term use was very harmful. The effort to do weaning must be done and facilitate the infant to adapt wean off CPAP. The effect of positioning on stabilized physiological parameters may help preterm infant to adapt under gradual weaning from CPAP. Aim in this study to determine the effect of prone positioning on physiological parameters in preterm infants under gradual weaning CPAP. From Mei to September 2020 total sample 60 preterm infants on non-invasive ventilation or CPAP were randomized into prone position (intervention group, n = 30) and supine position (control group, n = 30). Oxygen saturation, respiratory and heart rate between groups were compared. In the prone position was significant higher than supine position at 30th minute. The mean oxygen saturation in the prone position (99.87±0.35) was higher than in the supine position (97.63±1.45; p=0.001), the mean respiratory rate in the prone position (42.10±8.59 breaths/min) was lower than in the supine position (53.20±6.24 breaths/min; p=0.001), and the mean heart rate in the prone position (144.63±13.07/beats/min) was lower than in the supine position (153.53±10.02/beats/min; p=0.001), so that the prone position can be applied to increase oxygen saturation and to maintain the stability of respiratory rate in preterm infants during gradual weaning. The failure to wean off CPAP (re-CPAP) in the prone group was less frequent which is 3 respondents (5% versus 10%). However, there is no relation between positioning and re-CPAP (p=0.472).
The Structure, Process, and Outcome of Mentorship on Survivor with Schizophrenia: A Case Study
Authors: Kurniawan Rozali Arsyad , Suryani Suryani , Hernawaty Taty , Al-Kofahy Lilibeth
Published: May 2021

The personal recovery paradigm in schizophrenia patients require a change of service. One of the changes that can be made to support the schizophrenia recovery process is a change in the concept of the relationship between patients and nurses. Nurse mentorship for schizophrenia patients is a new terminology of innovation in a supportive relationship between health workers and patients. At present, it is not known how the structure, process, and outcome of mentorship to schizophrenia survivors. This study aimed to explain how the structure, process, and outcome of mentoring nurses to schizophrenia survivors. This research is qualitative research using the case study method involving three cases of mentorship conducted in Banyumas Regional Hospital. A total of nine participants were involved in this study which consisted of three nurses as mentors, three schizophrenia survivors, and three caregivers. Data were collected by semi-structured interview techniques, observation, and document review. After in-depth analysis    seven research themes were found. Participants' perception about the structure of mentorship include the theme mentorship requires a variety of abilities of nurses and conditions of survivors who can participate in mentorship. While the mentorship process includes the theme requires patience in mentorship, giving guidance for the recovery of survivors, and facing the recurrence of survivors due to treatment factors. Participants revealed the outcome of mentorship in the theme mentors feel inner satisfaction, and survivors feel more enthusiastic about life. The results of this study provide the view that mentorship has the potential to be developed into quality nursing interventions to support the recovery process of schizophrenia survivors.
Konstruksi makna proses kreatif pada kreator di biro iklan
Authors: Wirakusumah Teddy Kurnia
Published: May 2021

Artikel dengan judul konstruksi makna proses kreatif pada kreator di biro iklan bermaksud untuk memahami makna yang dikonstruksi oleh kreator iklan tentang proses kreatif yang mereka alami ketika membuat karya iklan. Pertanyaan penelitian yang diajukan adalah bagaimana kreator iklan mengkonstruksi proses kreatif yang mereka alami ketika bekerja membuat karya iklan menurut pandangan mereka sendiri. Metode penelitian yang digunakan adalah metode kualitatif dengan tradisi fenomenologi. Subjek penelitian yang dipilih adalah kreator iklan di Bandung dan Jakarta sebanyak 12 orang. Pengumpulan data dilakukan dengan metode wawancara mendalam. Sejumlah pertanyaan yang diajukan dibuat dalam bentuk daftar pertanyaan terbuka dan berlangsung dalam suasana informal. Hasil penelitian mengungkapkan bahwa tahapan yang lazim dilewati dalam pembuatan iklan di biro iklan adalah mengumpulkan informasi, menggunakan informasi, melakukan brainstorming, mengembangkan gagasan, melakukan review, eksekusi, artworking, presentasi, dan produksi. Dalam tahapan-tahapan pembuatan iklan yang dilalui oleh informan, ternyata proses kreatif yang berlangsung dalam diri informan tidak hanya terpusat pada salah satu tahap saja tapi tersebar pada semua tahapan dengan corak rangsangan yang khas. Kreator Iklan telah mengembangkan proses kreatif mereka berdasarkan berbagai jenis rangsang; yaitu proses kreatif berdasarkan rangsang rujukan data, proses kreatif berdasarkan rangsang pengalaman lama, proses kreatif berdasarkan rangsang pertukaran gagasan dan argumentasi, proses kreatif berdasarkan rangsang pengalaman baru, proses kreatif berdasarkan rangsang tidak terduga, proses kreatif berdasarkan rangsang kendala teknis,  dan proses kreatif berdasarkan rangsang kompromi dengan klien. Saat kreativitas berproses, faktor eksternal seperti lingkungan kerja dan waktu ternyata memberikan dukungan pada kinerja kreatif para kreator.
The COVID-19 Pandemic and the Environment in the Asia Pacific
Authors: Huang Hao
Published: May 2021

The COVID-19 pandemic has exposed the consequences of political and ecological choices that have been made and continue to be made in the Asia Pacific. Over recent decades, the region’s rapid urbanization and industrialization have played a significant role in dynamic national economic development,  a rapid rise in per capita income and the establishment of some of the world’s fastest-growing cities. Development has, however, come at a heavy price: planetary-health experts believe that a byproduct of human intrusion into remote wilderness areas has been a sharp uptick in environmental degradation and zoonotic diseases such COVID-19. Moreover, people living with poor air quality are more susceptible to this virus, and airborne particulate matter may even help to spread the virus.  A study conducted by the Harvard University T.H. Chan School of Public Health has confirmed  that there is a statistical correlation between high levels of air pollution and increased Covid-19 mortality rates.
Epidemiological Profile of COVID-19 in Brazil and Worldwide
Authors: De Freitas Carla , Calanca Gabriela , Ilias Elias Jirjoss , Bezerra Arthur Sousa
Published: May 2021

Introduction: COVID-19, caused by the new coronavirus or SARSCoV-2, has a high capacity for dissemination, which brings about an emergency scenario in public health. It manifests itself in a multifaceted manner, with a great variability in the profile of the affected population, which may be associated with biological, social and economic factors.
Objective: To know the epidemiological profile of the population affected by COVID-19, in order to promote better assistance.
 
Methods: This is a literature review, starting in 2020, using the SciELO, PubMed, Google Scholar, DATASUS databases and the website of the Brazilian Institute of Geography and Statistics (IBGE).
 
Results: Studies show a higher prevalence of SARS-CoV-2 infection in men, in the age group after the fourth decade of life and among whites.
 
Discussion: The first studies showed a prevalence of coronavirus infection in males. One of the hypotheses drawn was that men present more cardiopulmonary diseases and smoke more. Another study shows that women's lower susceptibility to infection is due to the X chromosome and sex hormones, which are essential for the innate and adaptive immune response. As for the age group, most studies show a higher prevalence after the fourth decade of life, due to increased expression of angiotensin 2 receptors (ACE2), hormonal changes in aging and associated comorbidities.
 
Conclusion: Studies show with greater assertiveness a predominance of involvement by COVID-19 in males, individuals from the fourth decade of life and in whites. However, it is important to investigate the epidemiological profile in order to offer better assistance and prevention.