bluuebunny/crossref_metadata_2025 huggingface dataset:
A dignidade humana no modelo antropológico-filosófico de Max Scheler e seus impactos
Authors:   , Borges Luiza Aparecida Bello
Published: October 2022

A presente dissertação tem como objetivo estudar a fundamentação da dignidade humana a partir do modelo antropológico-filosófico proposto por Max Scheler e os impactos desta fundamentação. O Filósofo compreende o ser humano enquanto dotado de espírito, isto é, enquanto pessoa, atributo que constitui seu objeto de interrogação inicial, qual seja, a peculiaridade humana no mundo. É a pessoa a origem e a fonte de atos de consciência espirituais a partir dos quais ela intui as essências (na dimensão teórica) e os valores (na dimensão prática) na própria vivência. Em ambas as dimensões, Scheler situa o a priori na esfera transcendente, podendo ser intuído pela consciência a partir da vivência (experiência fenomenológica). A fenomenologia scheleriana contrapõe-se ao criticismo de Kant que situa o a priori na dimensão transcendental, somente sendo alcançado através da especulação racional livre de qualquer apelo à experiência. São os valores o ponto de partida da ética material de Scheler e a pessoa é um valor sagrado (nível mais elevado da hierarquia de valores). Ao fazê-lo, a fenomenologia scheleriana supera o formalismo ético kantiano que concebe a pessoa como um fim a partir de uma releitura do imperativo categórico (formal e a priori). A proposta antropológico-filosófica é exposta no primeiro capítulo, tendo como referência a obra Formalismo na Ética e a Ética nãoformal dos Valores e o opúsculo Sobre a ideia de homem. No segundo capítulo, são investigadas a intuição dos valores, pilar da proposta ética de Scheler e o fenômeno da simpatia, como elo entre o personalismo ético e sociologia do saber, isto é, ponte que suporta o percurso entre a pessoa e a relação inter-pessoal (a intersubjetividade). Tais investigações são feitas a partir da primeira obra Essência e formas da simpatia. Por fim, no terceiro capítulo, reflete-se sobre a coletividade como o resultado do percurso que parte da pessoa e alcança o espírito coletivo orientado por valores a partir da obra Sociologia do saber. Concluise, portanto, que o personalismo ético de Scheler oferece uma fundamentação da dignidade humana apta a servir ao Direito, uma vez que é conteúdo objetivo e pode ser intuído pela coletividade. O desenvolvimento da pesquisa se dá na forma de investigação filosófica em que se define um objeto identificável, qual seja, a fundamentação da dignidade humana, e revisto a partir de uma investigação bibliográfica.
Letramentos catalisadores de reflexões: branquitude e desigualdades raciais em aulas de língua portuguesa na escola
Authors:   , Veiga Mariana Souza
Published: October 2022

Nesta pesquisa tenho como objetivo principal analisar os discursos produzidos por estudantes de uma escola pública para construir uma compreensão a respeito de como esses sujeitos se posicionam sobre vida social, direitos humanos, racismo, branquitude e opressões. Esta investigação está situada no âmbito de dois campos epistêmicos postos em diálogo: (a) dos estudos de Letramento, entendido como um conjunto de práticas de uso da linguagem aprendidas tanto em contextos formais quanto informais, que refletem e refratam processos culturais, sociais, históricos e de poder de uma comunidade e aos quais recorremos para alcançar determinadas finalidades (STREET, 1984, 2006, 2012; KLEIMAN, 1995); (b) dos estudos sobre diversidade racial (BENTO, 2002; MUNANGA, 2004; SANTOS, 2010; LABORNE, 2014, 2017; CARDOSO, 2010) e pedagogia decolonial (WALSH, 2007; OLIVEIRA; CANDAU, 2010), ao lançar lentes em temas como branquitude e racismo e os desafios de uma educação linguística transgressora das colonialidades do ser e do saber presentes nas práticas pedagógicas contemporâneas. A pesquisa pode ser definida como qualitativa e interpretativa de caráter etnográfico, já que leva em consideração a intersubjetividade das relações humanas e as compreensões dos participantes e da pesquisadora na análise dos dados. Tal estudo é realizado a partir da observação e registro em áudio do contexto de sala de aula a fim de melhor compreender as ações dos participantes no cenário examinado (GARCEZ; SCHULZ, 2015). Além disso, a investigação está situada no escopo da Linguística Aplicada indisciplinar (MOITA LOPES, 2006) a qual busca trazer compreensões sobre problemas do mundo social, os quais são perpassados por linguagem, a fim de reduzir o sofrimento humano. Os dados serão analisados à luz da Análise do Discurso em sua vertente pela Antropologia Linguística (GOFFMAN, 2002; HYMES, 2010; DURANTI, 2012; WORTHAM; REYES, 2015), em especial a partir dos conceitos de narrativa, posicionamento e indexicalidade. Proponho, ao final desse estudo, apresentar fatores interacionais e discursivos que orientam práticas de letramentos em sua vertente ideológica. Por fim, a pesquisa em questão traz benefícios ao apontar caminhos para a inclusão da temática do racismo na sala de aula de língua portuguesa e para a reflexão sobre a negligência da branquitude acerca de desigualdades e violências raciais.
Apropriação e uso dos dados do SPAECE, em matemática: caso de gestão da Escola de Ensino Médio Nossa Senhora da Assunção
Authors:   , Moura José Genivan de
Published: October 2022

A presente dissertação é desenvolvida no âmbito do Mestrado Profissional em Gestão e Avaliação da Educação do Centro de Políticas Públicas e Avaliação da Educação da Universidade Federal de Juiz de Fora (CAEd/UFJF). O objetivo geral desta pesquisa é compreender como a Escola de Ensino Médio Nossa Senhora da Assunção está se apropriando e fazendo uso dos dados do Sistema Permanente de Avaliação da Educação Básica do Ceará (SPAECE) na disciplina de matemática, a fim de promover estratégias educacionais que possibilitem melhorias contínuas da educação matemática, sem perder o foco nas metas, tendo em vista o baixo desempenho apresentado na disciplina de matemática no período de 2012 a 2018. Diante deste contexto, surge então a pergunta investigativa: Como vem sendo construído o processo de apropriação e uso de dados pela Escola de Ensino Médio Nossa Senhora da Assunção, mediante o cenário de baixo desempenho na disciplina de matemática, no SPAECE, no período investigado? Os objetivos específicos desenhados para melhor compreensão deste caso de gestão foram: i) Descrever como está sendo feita a apropriação dos dados; ii) Analisar como os dados estão sendo utilizados e iii) Propor um Plano de Ação Educacional (PAE). Como metodologia, foi adotado o estudo de caso, com caráter descritivo e exploratório e com abordagem qualitativa. Como referencial teórico foram adotadas as análises dos seguintes autores: Yin (2001), Godoy (1995), Gil (2008), Mainardes (2006), Brooke (2012; 2015), Bauer (2006), Soares (2004), Gatti (2009), Lück (2000; 2009), Boudett, City e Murnane (2020). Utilizamos, ainda, como instrumentos para coleta de dados, entrevistas semiestruturadas com a superintendente escolar, a diretora, dois coordenadores escolares e três professores de Matemática da 3ª série do Ensino Médio, a fim de compreender, sob a perspectiva desses atores, as estratégias que a escola está desenvolvendo em resposta ao problema de pesquisa. O baixo desempenho, evidenciado pela observação dos dados, permite asseverar que a escola faz a apropriação e o uso de dados, porém apresenta desafios de comunicação entre os processos avaliativos, participativos e colaborativos. Desta forma, propomos um Plano de Ação Educacional (PAE) que permita, dentro do que a escola já vem realizando, fazer uma melhor apropriação e uso dos dados, fundamentado na cultura das avaliações sistêmicas, no uso de evidências, no trabalho participativo e colaborativo e orientado para a melhoria contínua do ensino e da aprendizagem.
Avaliação de desempenho no estágio probatório: uma análise sobre o processo de avaliação dos profissionais do magistério na Prefeitura de São Luís (MA)
Authors:   , Anchieta Elinete Machado dos Santos
Published: October 2022

O caso de gestão analisa as fragilidades do processo de avaliação especial de desempenho dos profissionais do magistério na Prefeitura de São Luís, apresentando sugestões que possam contribuir para o seu fortalecimento. A questão de pesquisa ajudou a entender como as fragilidades do processo de avaliação especial de desempenho dos profissionais do magistério da Prefeitura de São Luís podem ser superadas, de forma a torná-la um instrumento mais eficiente para a gestão pública e para o desenvolvimento profissional dos professores. A metodologia adotada é estudo de caso, com abordagem qualitativa, realizada por meio de revisão da literatura sobre o tema, análise documental e pesquisa de campo com aplicação de questionários online e entrevista semiestruturada. As análises revelam relatos dos respondentes que demonstram as fragilidades do processo, aliados ao levantamento de dados iniciais, à teoria estudada e à análise documental, apontando para a necessidade de estratégias que são sugeridas no Plano de Ação Educacional. A partir dos resultados foram sugeridos: o aprimoramento dos instrumentos de avaliação e sua escala de classificação; a inclusão de indicadores mais específicos para a avaliação dos cargos de Professor de Docência e Professor de Suporte Pedagógico; a sensibilização dos avaliadores e avaliados sobre a importância da avaliação e do feedback; a realização de treinamentos para avaliadores e avaliados; a atualização dos documentos normativos que regulamentam e disciplinam o processo de avaliação especial de desempenho, alinhados às leis que regem o magistério público municipal de São Luís; a reestruturação da Comissão Central de Avaliação Especial de Desempenho; a criação do sistema informatizado de avaliação.
Resposta cardiovascular após uma única sessão de exercícios resistidos com restrição de fluxo em idosos hipertensos.
Authors:   , Seccato Alex Sandro
Published: October 2022

O objetivo deste estudo foi comparar os efeitos agudos do exercício resistido realizado com e sem restrição de fluxo sanguíneo sobre pressão arterial (PA) e frequência cardíaca (FC) em idosos hipertensos. A amostra foi formada por 10 idosos (68±8 anos) hipertensos medicados. Os voluntários foram submetidos a procedimentos preliminares (anamnese; medida da PA em repouso; avaliação antropométrica; familiarização aos exercícios resistidos; avaliação da força máxima; avaliação da pressão de restrição de fluxo) e a procedimentos experimentais (2 sessões com a execução de exercícios resistidos realizadas em ordem aleatória: com restrição de fluxo (CRF) sanguíneo; sem restrição de fluxo (SRF) sanguíneo). Pré e pós-intervenção (30 e 60 minutos) foram realizadas as medidas de PA e FC. Após as duas sessões experimentais foram realizadas as medidas ambulatoriais da PA e da FC (durante 24 horas). Durante o período de intervenção, os voluntários realizaram quatro exercícios resistidos de forma unilateral, 3 séries até a fadiga moderada, com intervalo de descanso de 90 segundos entre cada série. Na sessão experimental SRF os exercícios foram realizados com intensidade de 50% de 1 RM. Na sessão experimental CRF os exercícios foram realizados com intensidade de 20-30% de 1 RM e com manguitos inflados a 70% da pressão de oclusão total. Em comparação com os valores pré-intervenção, houve aumento da PA sistólica (CRF: 129,3±12,3 vs. SRF: 117,5±11,8 mmHg, P<0,05), diastólica (CRF: 81,4 ±7,4 vs. SRF: 75,7±6,9 mmHg, P<0,05) e média (CRF: 97,4±6,9 vs. SRF: 89,6±7,4 mmHg, P<0,05) em ambas as sessões experimentais, com maior aumento na CRF. Houve redução da FC até 60 minutos pós-exercício de forma similar entre as sessões (CRF: 68,2± 9,2 vs. SRF: 69,6 ±7,9 bpm, P<0,05). Não houve diferenças significantes entre as sessões e os momentos no duplo produto. Os dados ambulatoriais não apresentaram diferenças significantes entre as sessões experimentais. Em conclusão, ambas as sessões experimentais (CRF e SRF) apresentaram aumento nos valores da PA pós-exercício em condições clínicas, sendo que a sessão CRF promoveu maior aumento, na FC, houve redução nos valores pós-exercício em ambas as sessões e não houve diferenças significantes no duplo produto. Essas diferenças entre as sessões não se mantiveram em condições ambulatoriais.
Ezize Ceferzade’nin Eserlerinde Nizâmî Gencevî
Authors: BAYRAM Parvana
Published: October 2022

Hikâye, povest ve tarihi roman yazarı, akademisyen Ezize Ceferzade, aynı zamanda klasik edebiyat uzmanıdır. Klasik Azerbaycan edebiyatının derlenip toplanmasında, önemli temsilcilerinin hayat ve sanatının, eserlerinin genç nesillere tanıtılmasında onun önemli hizmetleri olmuştur. 2021 yılında, Azerbaycan’da Nizâmî Gencevî’nin doğumunun 880, Ezize Ceferzade’nin ise 100. yıl kutlamaları dolayısıyla çeşitli etkinlikler yapıldı. Yazarın bütün külliyatı incelendiğinde onun Nizâmî Gencevî sanatına hayranlığı ve birçok eserinde şairin mesnevilerinden alıntılara yer verdiği görülmektedir. O, Celaliyye povestinde, Nizâmî’nin çağını, biyografisini ve görsel tasvirini başarıyla canlandırmıştır. Müellif, 1991 yılında Azerbaycan’da Nizâmî’nin 850. doğum yıl dönümü dolayısıyla gerçekleştirilen bir yarışmaya, büyük şairden bahseden “Bir Görüş Efsanesi” adlı radyo piyesi ile katılmış ve bu eser jüri tarafından üçüncülük ödülü ve 600 manat para ile taltif edilmiştir. Ezize Ceferzade Qaratel, Qoşqar, Celaliyye povestlerinde ve daha birçok eserinde de Nizâmî Gencevî’den hayranlıkla bahsetmiş ve şairin mesnevilerinden alıntılara yer vermiştir. Çalışmada, yazarın bütün hikâye ve povestlerindeki Nizâmî Gencevî etkisi incelenecektir.
A Microtube-Based Wearable Closed-Loop Minisystem for Diabetes Management
Authors: Liu Yiqun , Yu Qi , Luo Xiaojin , Ye Le , Yang Li , Cui Yue
Published: October 2022

Diabetes is a chronic metabolic disease with a high blood glucose level, leading to both seriously acute and chronic complications. The closed-loop system is an ideal system for diabetes management. However, the large size and high cost of the commercial systems restrict their widespread uses. Here, we present for the first time a microtube-based wearable closed-loop minisystem for diabetes management. The closed-loop minisystem includes a biosensing device, an electroosmotic micropump, and a printed circuit board (PCB) with an algorithm. The microtube-based sensing device coated on the outer surface of the microtube is inserted into subcutaneous tissue for detecting interstitial glucose; the current signal for sensing glucose is processed by the PCB to power the electroosmotic micropump intelligently for the delivery of insulin into the subcutaneous tissue via the microtube channel. The closed-loop minisystem worn on a diabetic SD rat can successfully maintain its blood glucose level within a safe level. It is expected that this new closed-loop paradigm could open up new prospects for clinical diabetes management.
Angle-Only Target Tracking Method for Optical Imaging Micro-/Nanosatellite Based on APSO-SSUKF
Authors: Hua Bing , Yang Guang , Wu Yunhua , Chen Zhiming
Published: October 2022

To ensure the safety of the space station and improve the accuracy of the estimated trajectory tracking of noncooperative target, an optical imaging micro-/nanosatellite based on APSO-SSUKF (adaptive particle swarm optimization-spherical simplex unscented Kalman filter) is proposed to track low-orbit target using angle-only measurement. First, the algorithm considers the effect of J2 perturbation, uses the angle-only data as the observation vector, and uses spherical simplex unscented Kalman filter (SSUKF) to reduce the cost of calculation of the UKF in space noncooperative target tracking. Secondly, it is proposed to use the actual and theoretical covariance of the innovation sequence for real-time estimation of measurement noise, designing the adaptive particle swarm optimization (APSO) algorithm for real-time tracking of the process noise in the SSUKF that improves the accuracy of the filter in angle-only tracking. Finally, the tracking simulation of low-orbit satellite is carried out by using optical imaging micro-/nanosatellite, and the result shows that, compared with UKF, SSUKF, and PSO-SSUKF, APSO-SSUKF reduces the root mean square of the error in predicting the position in space target tracking by 45.44%, 35.26%, and 20.94%, and APSO-SSUKF reduces the root mean square of the error in velocity by 45.58%, 33.53%, and 16.33%, respectively; in the angle-tracking target, APSO-SSUKF improves the convergence and estimated accuracy of the algorithm in tracking.
Two New Species of Impatiens (Balsaminaceae) from the Eastern Arc Mountains of Tanzania
Authors: Gavin-Smyth Nora , Gereau Roy E.
Published: October 2022

We describe and illustrate the new species Impatiens butu Gavin-Sm. (Balsaminaceae) from the South Pare Mountains and I. ndovu Gavin-Sm. from the Nguru Mountains of Tanzania and compare them with morphologically similar and sympatric species of Impatiens L. Both localities are within the Eastern Arc Mountains of Kenya and Tanzania, a well-known center of plant species richness and high endemism.
Complexities of Simultaneously Improving Quality and Lowering Costs in Hospitals Comment on "Hospitals Bending the Cost Curve With Increased Quality: A Scoping Review Into Integrated Hospital Strategies"
Authors: Pai Dinesh R.
Published: October 2022

As health systems transition to value-based care delivery models, reducing costs and improving quality of care without sacrificing either remains a challenge for many healthcare organizations. There is extensive research on hospital costs, however, works addressing the complex relationship between hospital costs and the quality of care have been limited. In this commentary, I expound on the scoping review on integrated hospital strategies by Wackers et al that aim to improve quality while lowering costs. Specifically, I reiterate the complexity of the relationship between cost and quality and delve into major interdependent themes identified by the authors as relevant for the implementation of hospitals’ integrated strategy.
Modelling a System to Help Improve It Comment on "Insights Gained From a Re-analysis of Five Improvement Cases in Healthcare Integrating System Dynamics Into Action Research"
Authors: Øvretveit John
Published: October 2022

The article that this commentary considers describes the use of systems modelling in an action research (AR) project that helped improvement teams to understand the dynamics of their service as a system. This commentary seeks to make the complex article easier to understand for those unfamiliar with the subjects. It describes the advantages, disadvantages and benefits, and suggests developments of this approach for research and practice using digital technologies. The conclusion of the commentary is that dynamic system modelling combined with AR is useful for certain purposes and can produce benefits in terms of a more sophisticated understanding of systems and feedback loops for practitioners. However, there are challenges for researchers unfamiliar with AR and dynamic system modelling as well workshop facilitation expertise.
Analytical perspective on the interest of Slovak consumers in certified ecological products
Authors: Rovňák Martin , Stofejova Lenka , Kmec Lubomir , Benko Miroslav , Salabura Daniel
Published: October 2022

People's interest in certified ecological products, environmental organisations, and issues related to environmental protection is a broadly conceived issue and is also a black box for green marketing – the paper deals with the analysis of Slovak consumer interest in certified products and environmental organisations. The aim is to observe and analyse the interest of consumers in accredited products and environmental organisations and to point out significant differences between the respondents' gender and place of residence on environmental behaviour. It is known from the research results that they register the given environmental certificates but do not know all of them simultaneously. The most famous for them is the ecological certificate Environmentally Suitable Product. The product marked in this way creates an impression of environmental friendliness and a guarantee of higher quality. Consumers register these products mainly from websites and the mass media. Gender differences in the expression of interest in environmental product certificates were confirmed, and differences in consumer purchasing decisions regarding certified environmental products in residence were not confirmed.
Critical processes and risk factors of disturbances in the implementation of ecological reusable packaging into context of e-commerce sustainable development
Authors: Tokarski Daniel , Motowidlak Urszula
Published: October 2022

The aim of the article is to identify critical processes in the context of the implementation of returnable packaging in e-commerce and potential risk factors of disruptions in the use of ecological reusable packaging in e-commerce logistics services provided by Arvato Poland Sp. z o.o. they are based in Warsaw. The study is in line with the objectives of the European Green Deal and the circular economy. The applied research methods and techniques included: elementary analysis, desk research analysis, in-depth face-to-face interviews, causal analysis and selected methods of qualitative and quantitative analysis. The empirical study was carried out in 2021 in two locations of Arvato Poland Sp. z o.o. A review of the literature on the subject indicates that the use of ecological returnable pack-aging in e-commerce logistics is one of the available solutions with great potential to strengthen the sustainable development of the fashion industry. However, the conducted research revealed a high complexity of problems, mainly in the process of accepting, packing, shipping and returning the packaging, which was considered critical for handling e-commerce orders. An in-depth analysis using the Ishikawa diagram identified the causes of potential risk factors for disruptions in the use of reusable eco-packaging in the e-commerce market. It was indicated that improving the process of its implementation should focus on removing factors that make up the identified main categories of their causes. The conclusions of the study can have practical applications to improve the functioning of cost-effective and environmentally friendly e-commerce logistics. The system approach used by the authors in the study of returnable unit packaging in the sustainable development of closed-loop e-commerce contributes to the reduction of the research gap in this thematic area. The issue of ecological reusable packaging is in the initial phase of cognitive research and pilot tests.
Viral Hepatitis C in Patients with Tuberculosis of the Respiratory System
Authors: Юпатов Ю.Г. , Дмитраченко Т.И. , Кучко И.В.
Published: October 2022

Целью исследования явилась оценка риска гепатотоксичности и активности вирусного гепатита С при проведении противотуберкулезной терапии у пациентов с коинфекцией ТБ/ГС.Исследование включало 43 пациентов с коинфекцией ТБ/ГС и 48 пациентов с ТБ. Результаты исследования не выявили повышенного риска гепатотоксичности противотуберкулезной терапии у пациентов с коинфекцией. Доля пациентов, у которых в процессе приема противотуберкулезных препаратов отсутствовало повышение биохимической активности либо эпизоды повышения печеночных ферментов и билирубина отмечались лишь однократно, была выше среди пациентов с коинфекцией ТБ/ГС (18,6% vs 8,3%) по сравнению с моноинфекций ТВ. В процессе проведения противотуберкулезной терапии также имелась тенденция к снижению вирусной активности ВГС у большинства пациентов с коинфекцией.У пациентов с коинфекцией по сравнению с моноинфекцией значительно чаще имела место множественная или широкая лекарственная устойчивость M. tuberculosis к противотуберкулезным лекарственным средствам (79,1% vs 41,67%). При этом показано отсутствие роста вирусной активности ВГС и отсутствие увеличения гепатотоксического влияния бедаквилина в составе комбинированной терапии при коинфекции ТВ/ГС.

This study assessed the risk of hepatotoxicity and activity of viral hepatitis C during antituberculosis (antiTB) therapy in patients coinfected with tuberculosis and chronic viral hepatitis C (TB/CHC). Among the 91 examined patients, 43 had TB/CHC, and 48 had TB only. In the case of TB/CHC patients, antiTB therapy did not pose an increased risk of hepatotoxicity. The proportion of patients showing no increase in biochemical activity due to the intake of antiTB drugs or exhibiting only single episodes of elevated liver enzyme and bilirubin levels was higher for the TB/CHC group (18.6%) than for the TB group (8.3%). During antiTB therapy, a decrease in hepatitis C virus (HCV) activity was observed for most TB/CHC patients. Multiple or extensive resistance of M. tuberculosis to antiTB drugs was significantly more common in TB/CHC patients (79.1%) than in TB patients (41.67%). Notably, no increase in HCV activity or the hepatotoxic effect of bedaquiline as a part of the combination therapy for TB/CHC was observed.
A Cross-sectional Study of the Present Perfect Tense in Arabic and Indonesian EFL Settings
Authors: LİSTYANİ Listyani , AL-KADİ Abdu
Published: October 2022

This document-based paper investigates EFL learners’ uses of the present perfect tense when using English as their second or foreign language. A sample of 216 sentences written by 38 Indonesian and Arab undergraduate students was analyzed to detect erroneous uses of the present perfect tense (PPT) in their English writing. Twelve erroneous structures in the Arab corpus and 17 in the Indonesian dataset were underlined. The incorrect sentences were singled out and discussed. Pairing these grammar-related errors to SLA research and existing literature, the findings demonstrate that the majority of errors were grounded in either Arabic or Bahasa Indonesian language interference with English. The Arab learners seem to have more difficulties in using the PPT than the past simple tense. In contrast, the Indonesian EFL learners seem to have difficulties in both past and present perfect tenses altogether due to the absence of the past tense in the Indonesian tongue. It is concluded that learners’ mother tongues in both contexts affect their uses of English grammatical structures. This yields important implications with reference to the effects of the mother tongue in EFL settings.
KAJI KARAKTERISTIK PERPINDAHAN PANAS PENGARUH BELOKAN TAJAM PADA PENUKAR KALOR TIPE TUBE
Authors: Zulfan Zulfan , Syuhada Ahmad , Fuadi Zahrul , Munawir Al
Published: October 2022

Using the thermal machines in the production process or overdone heat power operation require unit of Heat Exchanger (HE) having high level heat transfer coefficient (hc) for transferring to the thermal reservoir. Experimental studies have been done for heat transfer characteristics of forced convection on the round duct with method use that compare three of heat exchanger with a variety of pipe bends and a long pass after a turn that is different.  HE pipes have length of tube 500 mm with a 12 bends, HE pipes length of tube 250 mm with 24 bends and HE pipes length of tube 125 mm with 48 bends. The heat fluid flowed into the tube, and the tube is immersed in the cold water tank. For each of test equipments can be done three times experiment with different variations in inlet temperature that is at 600C, 700C and 800C, with a duration of 5 minute intervals for 50 minutes. Many pipe bends and short passes after a HE will increase turbulence flow pattern. The high of turbulence will increase the value of heat transfer coefficient, but it can hold on fluid flow rate. Keywords : heat transfer characteristics, round duct, sharp bends, long pass
Tingkat Laju Korosi Atmosferik Baja Konstruksi di Lingkungan Pabrik Kelapa Sawit
Authors: Susanto Herdi , Supardi Joli , Ali Sulaiman
Published: October 2022

Environmental pollution that can cause atmospheric corrosion is the exhaust gas (exhaust fumes) generated from operating the palm oil industry. This atmospheric corrosion will reduce the volume and material mass of a machine component, so that if it reaches certain conditions the strength of the material will result in failure of industrial machine components. The corrosion rate of the construction steel can be measured using the weight loss method according to the ASTM G-50 standard and the ASTM G-1 standard. The research was conducted for one year and data collection was taken every month, the research location was at PT Agro Sinergi Nusantara Batee Puteh. The results of the study, the highest corrosion rate occurred in strip steel reaching 0.57 mpy in October and the lowest corrosion rate occurred for angled steel in September and cylindrical steel in May with a corrosion rate of 0.06 mpy. Keywords— atmospheric corrosion, palm oil industry, ASTM G-50, ASTM G-1, corrosion rate
Studi Boundary Element Method dan Multi-objective Inverse Analysis untuk Simulasi Deteksi Multikorosi Beton Bertulang
Authors: Masykuri M. Abrar , Ihsan M. , Fonna S. , Huzni S. , Susanto Herdi
Published: October 2022

AbstractNowadays, corrosion probem become one of the important problem for infrastructures over the world. Therefore, over the last decades, several corrosion reearch has been investigated. Several software have been developed to simulate corrosion that occurs on the reinforcing steel in concrete. The fundamental goal of the simulation is to predict the degree of corrosion that achieved. Many pioneering works allowed for the successful application of the boundary element method (BEM) to simulate the corrosion. This research aims to study the ability of Boundary Element Inverse Analysis (BEIA) in detecting corrosion that more than one location or known as Multi corrosion on the reinforcing steel in concrete. BEIA is a method that developed to detect corrosion in reinforced concrete. BEIA developed by combining the application of Boundary Element Method (BEM) and Multi-objective Particle Swarm Optimization (PSO). BEM used to calculate potential values on concrete surfaces. Furthermore, PSO is used to evaluate the cost function to detect corrosion on reinforcing steel inside concrete. To execute BEIA, it requires several input parameters include the results of meshing and potential data from the field. However, in this case, the field potential data used is the result of the calculation of  BEM simulation with a mesh size of 4mm and assuming the location of corrosion is at X1 = 50 mm and X2 = 350 mm. The simulation results from BEIA show that the position of the particles at the 150th iteration is already at the specified location, at X1 = 50 mm and X2 = 350 mm, this proves that Multi-objective BEIA can simulate multi corrosion detection that occur on a concreted surface.. Keywords—Multi corrosion, BEM,  Multi-objective, BEIA, corrosion detection, reinforced concrete
Usulan Perancangan Mesin Alcon Pada Dinas Kehutanan Jakarta Selatan Dengan Metode Reba
Authors: Widyantoro Murwan , Montororing Yuri Delano Regent , Darsan Herri
Published: October 2022

This study aims to calculate the risk value for complaints experienced by workers at the Jakarta City Park Service when moving the Alcon machine by calculating the REBA value and getting the results of A score A score is 10, a B score is 8 then the C score is 9 with a Mean Risk Level. Height and immediately required speciication action for designing erginomic aids, namely TSB (Height of Elbow Standing and JT (Hand Reach) with the TSB dimension results from the percentile results, namely 104.65 cm used as a height measurement of the Alcon Machine push table and the results of the JT dimensions from the percentile results namely 85.01 cm which is used to measure the width of the Alcon Machine push table.Keywords - Work Posture, REBA, Anthropometry, Facility Design
Uji Kebisingan pada Motor Listrik dan Tabung Sentifugal Mesin Produksi Santan Kapasitas 10 Liter Per Jam
Authors: Susanto Herdi , Munawir Al , Darsan Herri
Published: October 2022

Noise standards on a machine are very important to consider before the machine is produced, because it can cause discomfort to the operator and damage hearing function. The noise standard has been set by OSHA, the maximum noise threshold value of 85 dB is considered safe for most workers when working 8 hours / day. The coconut milk production machine with a capacity of 10 liters per hour was carried out by measuring the noise level which aims to determine whether the machine meets the noise standard criteria. The test was carried out at three levels of motor rotation, namely 1000 rpm, 1500 rpm, 2000 rpm with a noise measuring distance of 0.5 meters from the component parts of the electric motor and centrifugal tube using a sound level meter. The results of measurements of noise levels on electric motors and centrifugal tubes of coconut milk production machines with a capacity of 10 liters per hour can be concluded that the noise level value of the production machine meets the noise standard level required by OSHA 1978, where the maximum production machine noise level is at 75 dB while that which is implied by OSHA 1978 maximum is at 85 dB. Keywords— OSHA standards, electric motor, centrifugal tube, noise test
Pemetaan Potensi Pembangkit Listrik Tenaga Bayu di Perairan Indonesia Berdasarkan Data Satelit ASCAT
Authors: Safrizal Safrizal , Ardiansyah Haimi , Dailami Dailami
Published: October 2022

Kebutuhan energi listrik menjadi isu penting yang dapat mendorong daya saing Indonesia di kancah perekonomian dunia. Saat ini, Indonesia masih menggunakan energi yang bersumber dari fosil. Energi fosil adalah energi yang tidak terbarukan sehingga akan habis pada suatu masa. Kemampuan Indonesia dalam menghasilkan energi listrik terbarukan merupakan solusi dari permasalahan tersebut. Salah satu sumber energi listrik terbarukan berasal dari Pembangkit Listrik Tenaga Bayu (PLTB). Penelitian ini bertujuan memetakan sumber energi PLTB di perairan Indonesia dengan menggunakan data dari satelit ASCAT. Penelitian ini dimulai dengan mengumpulkan data harian kecepatan bayu periode 01 Januari 2017 sampai dengan 31 Desember 2018. Data tersebut merupakan data pada ketinggian 10 m, dengan menggunakan model matematis data tersebut kemudian diolah agar didapatkan kecepatan bayu serta power density pada ketinggian 120 m. Langkah selanjutnya adalah pembuatan peta potensi PLTB di perairan Indonesia. Dari peta tersebut, diketahui bahwa perairan Indonesia di Samudera Hindia dan Laut Arafura memiliki potensi yang lebih baik dari pada perairan lainnya. Kecepatan bayu rata-rata pada ketinggian 120 m adalah 9,24 m/s, sedangkan rata-rata power density sebesar 955,64 W/m2. Jumlah turbin yang dapat dibangun di wilayah ZEE Indonesia adalah sebanyak 4.800.292 unit dengan jumlah tersebut maka dapat menghasilkan energi listrik sebesar 10.080 GW.
Proposed Productivity Improvement of 1800 Press Machine Using Overall Equipments Effectiveness
Authors: Widyantoro Murwan , Montororing Yuri Delano , Paduloh Paduloh , Solihin Solihin , Murhaban Murhaban
Published: October 2022

Increased productivity is an effort to increase production capacity by increasing the productivity of each factor of production. PT XYZ is a company that uses sophisticated machines and facilities to produce aluminium profiles that create various needs in the form of building goods or furniture products in the form of doors, windows, partitions, frames, rolling doors, etc. One of the machines used is the 1800 press machine. This study aims to increase productivity with Overall Equipment Effectiveness (OEE) to make improvements. Based on the calculation of the Overall Equipment Effectiveness (OEE) of the 1800 press machine during January - December, the final value was 52%, this value indicates that the effectiveness of the 1800 press machine has not reached the ideal deal of 85% so that some improvements are needed. The company experiences the three most considerable losses: Breakdown Losses, Setup and Adjustment Losses, and Reduce Speed Losses, so repairs must be made to these three losses so that the 1800 press machine can achieve its best performance. Keywords— Overall Equipments Effectiveness (OEE), Six Big Losses, 1800 press machine
Fabrikasi Jig Untuk Penggurdian Benda Silindris
Authors: Hamdani Hamdani , Sumardi Sumardi , Syamsuar Syamsuar , Mawardi Mawardi
Published: October 2022

Penggurdian merupakan kegiatan yang sering dilakukan dalam proses manufaktur dan biasanya untuk penempatan baut, pin, dan juga sebagai saluran media tertentu.  Penggurdian pada pipa dilakukan dengan posisi pipa yang dicekam sedemikian rupa sehingga menghasilkan pekerjaan yang presisi. Dengan tuntutan efesiensi dan produktivitas yang tinggi dan produk yang presisi, diperlukan suatu alat bantu atau jig yang efektif dan efisien digunakan untuk melakukan proses gurdi pada benda silindris. Metode yang digunakan adalah melalui observasi kebutuhan di lapangan, kemudian membuat gambar desain alat, selanjutnya memfabrikasi komponen-komponen. Tahapan selanjutnya mengelas dan merakit komponen-komponen tersebut menjadi suatu alat dan pengerjaan finishing. Akhirnya jig diuji yaitu dengan menggurdi benda silindris yaitu pipa dengan hasil yang optimal dan presisi.
UNJUK KERJA PERALATAN PENGERING HYBRID (ENERGI MATAHARI DAN GAS) UNTUK PENGERINGAN BIJI COKLAT
Authors: Abd Miswar , Zulfan Zulfan
Published: October 2022

This research was conducted to examine the drying system with a hybrid energy source between solar energy and gas fuel for applying cocoa beans. Solar thermal energy is used as the main energy source for this dryer, while the energy source from gas fuel is the main energy back-up when the intensity of the sun's heat drops (afternoon, evening and cloudy weather). The results of this test indicate that the drying performance of the data plate collector with 3 cm thick black sand can eradicate cocoa beans with an initial air content of 65-75% with a duration of 26-28 hours, while the hybrid dryer with heat and gas energy sources can shorten the time. drying to 17-19 hours. Keywords: Hybrid Energy, Gas Fuel, solar intensity, Temperature
Analisis Penambahan Carboxy Methyl Cellulose Pada Plastik Biodegradable Dari Bonggol Pisang
Authors: Amni Chairul , Supardi Joli , Irmayanti Irma , Miftaurrahmah Miftah
Published: October 2022

Penggunaan tepung bonggol pisang sebagai bahan baku pembuatan plastik biodegradable merupakan salah satu alternatif penggunaan plastik pati pisang dalam upaya mengurangisampah plastik. Pisang mengandung 66% karbohidrat, protein, air dan mineral penting. Untuk mendapatkan plastik biodegradable, ditambahkan pati bersama dengan CMC (carboxy methylcellulose), gliserol dan minyak sereh sebagai anti bakteri dan antioksidan. Pada penelitian ini dilakukan pembuatan plastik biodegradable campuran pati, CMC, gliserol sebagai plasticizer dan minyak sereh dengan memodifikasi CMC, gliserol dan minyak sereh. Penelitian ini mencakup dua variabel, yaitu variabel tetap dan variabel. Variabel tetap meliputi konsentrasi pati dengan udara 1:5, kecepatan pengadukan 100 rpm dan suhu gelatinisasi pati 70oC, sedangkan variabel yang meliputi konsentrasi CMC meliputi kadar (5,5; 6 ,5; dan 7,5 ) % (b/b), sereh wangi konsentrasi minyak termasuk (15; 20; dan 25) % (b/v), dan konsentrasi gliserol termasuk (25; 35; dan 45)% (b/v). Penelitian ini bertujuan untuk mengetahui pengaruh penambahan CMC (carboxy methyl cellulose), minyak sereh dan gliserol sebagai plasticizer terhadap sifat mekanik, morfologi,dan uji biodegradabilitas , serta aktivitas antioksidan plastik yang dihasilkan. Hasil penelitian ini menunjukkan bahwa plastik biodegradable memiliki nilai kuat tarik sebesar 0,210,38 kgf/mm2; nilai elongasi antara 16 , 3 - 54,20%; Pemeriksaan morfologi menunjukkan bahwa permukaan plastik halus dan plastik terurai sempurna dalam tanah dalam waktu 27 hari. Kata kunci - biodegradable plasti k , CMC , Minyak Sereh, Pati Pisang.
PEMBUATAN ALAT UKUR RESISTIVITAS DENGAN SISTEM SENSOR TEGANGAN DAN SENSOR ARUS ACS712 BERBASIS MIKROKONTROLLER ARDUINO NANO
Authors: Marbun Mahmuddin , Moh Safarun
Published: October 2022

Penelitian tentang pembuatan alat ukur resistivitas yang berbasis mikro kontroler arduino dengan menggunakan dua sensor yaitu  ACS 712 5A dan sensor tegangan, alat telah berhasil di kalibrasi dengan resisitivitymeter OYO 2115A MCoHM sebagai reverensi.kedua alat digunakan    mengukur resistor sebesar 10 Ohm antara P1 , P2dan antara C1 dan C2 dipasang resistor geser (Rheostat)sebesar 500 Ohm, dilanjutkan dengan analisis data untuk menentukan standart deviasi resistivitymeter.Hasilnilai standart deviasi dari pengukuran  OYO sebesar10.135±0.002 dan resistivitymeter yang dibuat sebesar 9.49±0.023, selain itu dibandingkan dengan resistivitymeter naniura NRD 300 HFstandart deviasinya 14.7±2.69, dilakukan juga pengujian di lapangan dengan tiga konvigurasi Schlumberger dengan panjang AB/2 74 meter,konvigurasi Wenner dengan a = 5 meter dan 10 meter, dilanjutkan konvigurasiDipole-dipole dengan a = 5 meter. Data hasil pengukuran baik menunjukan tren yang sama mendekati resistivitymeter OYO, pada konvigurasi Schlumberger hasilnya sangat baik.
Perencanaan Pembangkit Listrik Berbasis Flywheel Ganda
Authors: Jaya Muh. Aksan , Hamri Hamri , Habib Faisal , Efendi Rustam
Published: October 2022

Energi listrik merupakan kebutuhan vital di abad 21 ini. Sumber energi listrik selama ini bersumber dari energi fosil terus mengalami penurunan pasokan dan berbagai macam isu lingkungan akan penggunaan energi fosil. Salah satu yang dapat dilakukan untuk mengatasi permasalahan tersebut adalah menggunakan energi yang memungkin diambil kembali. Flywheel Energy Storage System merupakan salah satu yang bisa dikembangkan, dengan adanya energi kinetik yang dimiliki oleh flywheel memungkin untuk menaikkan kapasitas penyediaan energi. Tujuan penelitian ini adalah merancang dan menguji pembangkit energi berbasis flywheel. Metode perencanaan adalah metode perhitungan elemen mesin. Hasil perhitungan perencanaan pembangkit listrik berbasis flywheel didapatkan kecepatan sudut flywheel (ω) sebesar 181,42 rad/s, momen inersia 0,35 kg/m², torsi 4,28 Nm, energi kinetik 5.825 Joule. Perbandingan putaran (i) motor listrik-flywheel sebesar 1,3 dan flywheel-generator 1, ukuran V Belt motor listrik-flywheel adalah A-43 dan flywheel-generator A-45.
Analisa Performance Mesin Las Titik Tipe X menggunakan OEE dan Six Big Losses
Authors: Widyantoro Murwan , Paduloh Paduloh
Published: October 2022

Peningkatan Performa produksi harus dilakukan oleh perusahaan sebagai bagian dari memenangkan persaingan. kondisi mesin spot welding yang saat ini dimiliki perusahaan sering mengalami breakdown, yang kemudian mempengaruhi produktivitas mesin. untuk itu perlu dilakukan penelitian mengenai kondisi tersebut. Metoda yang digunakan dalam penelitian ini adalah Overall Equipment Effectiveness dan Six Big Losses. Tahap awal dalam penelitian ini adalah mencari nilai Overall Equipment Effectiveness, selanjutnya melakukan identifikasi Six Big Losses. Dari hasil analisis dan  pengolahan data menggunakan metode Overall Equipment Effectiveness dan Six Big Losses didapatkan nilai Overall Equipment Effectiveness pada Mesin Las Titik Tipe X sebesar 70,861% , kondisi ini dipengaruhi oleh faktor Six Big Losses yaitu Produk yang rusak and Perbaikan produk yang rusak tersebut, Untuk itu perlu dilakukan peningkatan pada kinerja maintenance Mesin Las Titik Tipe X.  Kata kunci— Kemampuan mesin, mesin las tipe x spot, OEE, Six Big Losses
Pengaruh Fouling Factor Terhadap Performa Heat Exchanger Tipe Shell and Tube
Authors: Sari Handini Novita , Arsana I Made , Hidayatulloh Muchlas
Published: October 2022

Heat exchanger adalah suatu alat penukar panas paling umum digunakan yang berfungsi sebagai pemanas maupun pendingin, dimana proses pertukaran panas yang terjadi pada heat exchanger disebabkan adanya perbedaaan temperatur. Semakin lama heat exchanger digunakan akan menyebabkan terjadinya fouling (pengotoran) di bagian dalam heat exchanger. Semakin besar fouling yang terjadi akan menyebabkan terjadi penurunan kinerja heat exchanger seperti besarnya laju perpindahan panas aktual dan efektivitas. Oleh karena itu dilakukan analisis heat exchanger untuk mengetahui pengaruh fouling terhadap laju perpindahan panas aktual dan efektivitas heat exchanger. Pada penelitian ini tipe heat exchanger yang digunakan adalah jenis shell and tube, spesifikasi alirannya adalah counter flow, one pass, dengan baffle bertipe singgle segmental, fluida yang digunakan adalah Sollar pada shell dengan suhu masuk 536 °F ke 248 °F dan fluida minyak mentah pada tube dengan suhu masuk 95 °F ke 208,4 °F. Berdasarkan hasil perhitungan, tahanan panas dalam keadaan bersih didapatkan (UC) 157.42 BTU/ jam.ft2.oF, sedangkan tahanan panas dalam keadaan kotor (UD) sebesar 9.28 BTU/ jam.ft2.oF  sehingga didapatkan Nilai Faktor Pengotoran ( Rd )  sebesar 0,101 dan nilai effektifitas alat penukar kalor tipe shell and tube sebesar 63,48 %.Kata kunci— Alat penukar kalor, Shell and tube, Faktor Pengotoran, Effektifitas.
ANALISIS GAYA DORONG (THRUST) PROPELLER PADA PESAWAT MODEL REMOTE CONTROL (UAV)
Authors: Sihaan Josua Cornel Roni , Munawir Al , Husin Zakir
Published: October 2022

Unmanned aircraft or known as UAV (Unmanned Aerial Vehicle) is an aircraft technology that is controlled ly by the operator using  Control. The thrust is determined according to the needs of the aircraft itself. This study uses a thrust test stand that uses a mass measuring device as a measuring force, using a brushless motor and 3 different types of propellers, namely propeller two with a size of 8 x 4 inches and 10 x 7 inches, three propellers with a size of 6 x 3 inc to determine the optimal thrust for missions flying -controlled model aircraft (UAV). After testing, it was found that the smallest thrust force of the 6x3 inch blade type propeller, on this type of propeller only 3,874 N of thrust is produced at 100% throttle percentage and uses a 3 cell battery. While the greatest thrust generated from the propeller with a type of two when 10x7 inches, on this propeller and using a 4 cell battery can produce a Thrust of 13,194 N with a percentage of full throttle or 100%. The thrust required for the aircraft to fly cruising in the air is 0.806 N, while the thrust required for the aircraft to take off is 6.513 N.Keywords: Control Model Aircraft, Propeller, Thrust
COVİD-19 PANDEMİ DÖNEMİNDE OKUL ÖNCESİNDEKİ UZAKTAN EĞİTİM SÜRECİNİN İNCELENMESİ
Authors: YANIK ÖZGER Betül
Published: October 2022

Bu araştırma, Covid-19 pandemi döneminde okul öncesindeki uzaktan eğitim sürecinin incelenmesini amaçlamıştır. Araştırmaya bağımsız bir devlet anaokulundaki 5-6 yaş grubundaki 14 çocuk ve 1 okul öncesi öğretmeni katılmıştır. Durum çalışması olarak tasarlanan araştırmada gözlem ve görüşme yöntemi kullanılmıştır. Gözlemler, 2020-2021 eğitim öğretim yılı içerisinde uzaktan yürütülen çevrimiçi videolar üzerinden yapılmıştır. En fazla 40 dakika süren 10 video detaylı şekilde incelenmiştir. Videolar incelendikten sonra yalnızca öğretmenle yarı yapılandırılmış ve çevrimiçi görüşme gerçekleştirilmiştir. Elde edilen veriler içerik analizi yöntemiyle çözümlenmiştir. Bulgulara göre Covid-19 Pandemi döneminde uzaktan eğitime katılım düşük kalmıştır. Aileler eğitim süreci içerisinde yer alırken çocukların aktif katılımı için çaba göstermişlerdir. Uzaktan eğitim sürecinde yürütülen etkinliklerde okuma yazma çalışmalarına ağırlık verilmiş ve öğretmen teknik aksaklıklar nedeniyle uzaktan eğitim sürecini yönetmekte güçlük çekmiştir. İlişkilerin yalnızca dijital ortam üzerinden yürütülmesi ise sosyalleşmeyi zayıflatmıştır.