bluuebunny/crossref_metadata_2025 huggingface dataset:
Preparation of Celery Leaf Extract, Phytochemical Screening, and Nanoparticle Formulation in Antiaging Cream Development
Authors: Wijaya Mike , Kasim Anwar , Kasim Fitriani
Published: February 2025

This study examines the preparation of bioactive extracts from celery leaves (Apium graveolens L.) and their transformation into nanoparticulate forms for potential application in antiaging formulations. The celery leaves were extracted using the maceration method with 96% ethanol. The phytochemicals of celery extract were examined using a unique reagent, which shows the celery extract contains flavonoids, alkaloid, and triterpenoid. These compounds are usually used as active agents in antiaging creams. We employed the ultrasonication probe-homogenizer to produce nanosized particles of celery extracts. The particle size analyzer data showed that the particle size significantly reduced from 6,757.2 nm (bulk) into nanoparticle when probe homogenization was employed, with average sizes of 583.8 nm (30 minutes homogenization), 219.9 nm (60 minutes homogenization), and 161.7 nm (90 minutes homogenization). These values indicate that within time, the bulk active compound in celery could be used to formulate an antiaging cream for the next applicationContribution to Sustainable Development Goals (SDGs):SDG 3: Good Health and Well-being SDG 9: Industry, Innovation, and Infrastructure SDG 12: Responsible Consumption and Production
Fabrication of Fe3O4/PEG 4000/Oleic Acid Ferrofluids on Crystal Structure and Magnetic Properties Using Rhee Sumbawa Iron Sand
Authors: Bahtiar Syamsul , Islam Izzul , Jayatri Adella Ulyandana , Widyawati Fauzi , Yanuar Emsal
Published: February 2025

The fabrication of ferrofluid using Fe3O4 nanoparticles synthesized from Rhee Sumbawa iron sand has been successfully carried out. This fabrication was conducted to study the crystal structure characteristics and magnetic properties of the ferrofluid from Rhee iron sand. The fabrication used the co-precipitation method at room temperature to synthesise Fe3O4 nanoparticles. In contrast, the ferrofluid fabrication employed a magnetic stirrer with the addition of PEG 4000/Oleic Acid as a surfactant. The structure and magnetic characteristics of the Fe3O4/PEG 4000/AO ferrofluid will be investigated in this work. The results of the XRF characterization show an Fe content of 91.73%, indicating that the purity of Fe has been successfully increased using a permanent magnet separation method. The XRD characterization results show the formation of a cubic crystal system with lattice parameters a=b=c = 9.3797 Å, α=β=γ = 90°, and the crystal size obtained from the refinement is 8.42 nm. The TEM characterization results indicate that the morphology of the nanoparticles is spherical with a particle size of 7.34 nm. The VSM characterization results obtained the ferrofluid magnetization value in the 0.08–0.34 emu/g range.
Utilization of Sang Mamong Leaf Extract (Lantana camara) as an Anti-Head (Pediculus humanus capitis) Lice Shampoo
Authors: Riskayanti Yunita , Febrianti Mutia
Published: February 2025

Head lice (Pediculus humanus capitis) are a scalp health problem that can attack all ages, especially children aged 3–11 years. Women have a higher risk of infection than men. In Seteluk District, West Sumbawa Regency, a survey of 40 children aged 6–13 years (20 girls and 20 boys) showed that 100% of girls (20 people) had head lice, while only 20% of boys (4 people) who are infected. The high risk in girls is influenced by wearing the hijab from an early age, hot weather, and sweat, which causes hair to become wet, thereby supporting the development of head lice. Head lice cause severe itching that triggers excessive scratching, potentially causing wounds, irritation, scalp infections, and increasing the risk of fever in children. This research aims to prove the effectiveness of sang mamong (Lantana camara L) leaf extract as an anti-head lice (Pediculus humanus capitis) shampoo through quantitative experimental methods. Making sang mamong extract using 60 grams of dry and fine sang mamong, using 450 mL of 96% alcohol for 2 days, then heated at 70 oC to produce sang mamong extract. Data analysis techniques are based on the results of pH measurement tests, foam height tests, and activity tests. The researcher's hair lice activity test results used 1 mL of anti-lice material, dropped evenly on filter paper, and placed in a petri dish. For anti-lice shampoo without using sang mamong leaf extract, the 3 fleas tested showed no change in active flea activity for up to 1 hour, whereas for shampoo containing sang mamong extract it showed different activity for each extract and the most effective flea activity test results were Anti-lice shampoo containing 4% sang mamong can kill 2 head lice, 1 within 4 minutes and 1 within 11 minutes, and this shows that anti-lice shampoo containing Sang mamong extract (Lantana camara L) is still better than the shampoo sold on the market, based on activity tests, market shampoo is only able to make 2 lice immobile in just 30 minutes, then 3 lice move again for up to 60 minutes without showing any change. The pH measurement test shows an average value of 6, and the foam height test produces an average value of 8.5. Based on these findings, sang mamong (Lantana camara L) leaves can produce an effective anti-head lice shampoo. Tests for pH levels, foam height, and flea activity on shampoo made from sang mamong (Lantana camara L) leaves meet the criteria for good quality shampoo. Shampoo trials have been conducted on 3 children and 2 teenagers, showing safe results without irritation. scalp and effectively makes hair lice fall out during use.
The Impact of Fertilizer Subsidy Policies on The Profits and Welfare of Rice Farmers: Lessons from Sumbawa West District
Authors: Suparmin  , Wuryantoro  , Purnamasari
Published: February 2025

The objectives of this study were to analyze the impact of fertilizer subsidy policies on production, profits, and surplus of rice farmers, and to compare productivity, profits, and surplus of rice farmers. The study was conducted in Brang Rea District, West Sumbawa Regency. The respondents in this study were farmers who owned rice farmers with details of 30 farmers who received fertilizer subsidies and 30 farmers who did not receive fertilizer subsidies. Data were collected through observation, surveys, and in-depth interviews. Data were analyzed using the optimization of the Cobb-Douglas production and profit functions. The results of the study concluded that the impact of fertilizer subsidy policies on production was positive and significant, while the impact on profits was positive but not significant. There was a significant difference between productivity and capital costs or production facility costs between the group of farmers who received fertilizer subsidies and the group of farmers who did not receive fertilizer subsidies, but there was a difference in labor costs and profits but not significant. The level of farmer welfare in the group of farmers who received subsidies was higher than the group of farmers who did not receive subsidies.
The Markers of Body Size and Shape of Bali Cattle and its Crosses with Exotic Bulls
Authors: Rusdin Muh. , Nafiu La Ode , Aku Achmad Selamet , Sahaba La Ode
Published: February 2025

One of the genetic improvement efforts to improve the performance of Bali cattle offspring production is crossbreeding Bali cattle with exotic bulls. This study aimed to identify markers of body size and shape of Bali cattle and its crosses with exotic bulls using principal component analysis. The materials used in this study were 91 heads of Bali, Simbal, Brahmbal, Limbal, and Pobal cattle, consisting of 34 males and 57 females. The variables observed were body measurements (morphometrics) consisting of shoulder height, body length, chest circumference, chest depth, chest width, hip height, and hip width. Data analysis used Principal Component Analysis in the Minitab Release 19 statistical application. The results showed that Bali, Simbal, Brahmbal, Limbal, and Pobal male cattle had the same body size markers, namely chest circumference. The body shape markers of male cattle are hip height for Bali cattle, chest length for Simbal and Pobal cattle, chest depth for Brahmbal cattle, and hip width for Limbal cattle. The body shape markers in female cattle are body length for Bali, Simbal, Brahmbal, and Pobal cattle, and hip height for Limbal cattle. These body size and shape markers have a strong correlation with the first principal component and the second principal component, so they can be used as selection criteria to improve the production performance of Bali and Bali crossbred cattle.
32º Simpósio da Pós-Graduação em Engenharia Mecânica
Authors: Guimarães Gilmar
Published: February 2025

Este livro apresenta os trabalhos submetidos na 32ª edição do POSMEC, o Simpósio da Pós-Graduação em Engenharia Mecânica da Universidade Federal de Uberlândia (UFU). Dedicado ao tema Engenharia na Indústria: Desafios, Futuro e Inovação Interdisciplinar, o evento promoveu a troca de conhecimentos e novas perspectivas entre estudantes, pesquisadores e profissionais. O POSMEC foca nas três áreas de concentração do programa de pós-graduação: Materiais e Processos de Fabricação, Mecânica dos Sólidos e Vibração, e Transferência de Calor e Mecânica dos Fluidos.

Esta coletânea destaca os projetos inovadores que estão sendo desenvolvidos pelos alunos do programa, refletindo o compromisso com a formação de profissionais qualificados e o avanço técnico-científico na engenharia. Ela oferece uma visão abrangente das pesquisas que impulsionam o futuro da área e respondem aos desafios gerais da atualidade.
DESENVOLVIMENTO DE UM BANCO DE DADOS PARA ANÁLISE FRACTOGRÁFICA DE CORPOS DE PROVA CHARPY
Authors: José João Pedro Cândido , Oliveira Erick Tomaz , Assis Pedro Augusto Queiroz de , Arencibia Rosenda Valdés
Published: February 2025

O presente estudo teve como objetivo criar um banco de dados padronizado de imagens de fraturas de corpos de prova Charpy, para auxiliar na análise de superfícies de fratura e no desenvolvimento de algoritmos de processamento de imagens. A metodologia incluiu a utilização de um estereomicroscópio equipado com uma câmera de alta resolução para capturar as imagens, juntamente com o desenvolvimento de um suporte específico modelado em CAD e impresso em 3D, que assegurou o correto posicionamento dos corpos de prova durante a captura das imagens. As superfícies de fratura foram preparadas por meio de procedimentos de limpeza e remoção de óxidos para garantir a qualidade das imagens. As imagens foram organizadas e armazenadas utilizando um sistema de nomenclatura que facilitou a rastreabilidade e a uniformidade dos dados. Como principal conclusão, o estudo demonstrou que a padronização e a qualidade do banco de dados criado são essenciais para reduzir erros humanos e melhorar a confiabilidade das análises futuras, fornecendo uma base sólida para o desenvolvimento de técnicas automatizadas de análise de fraturas.
AVALIAÇÃO DA QUALIDADE SUPERFICIAL DE LIGA AERONÁUTICA APÓS O PROCESSO DE RETIFICAÇÃO COM DIFERENTES GRAUS DE RECOBRIMENTO DO REBOLO
Authors: Reis João Vitor Antonieti , Prado Geovanna Lissa da Silva , Ferro Matheus Baldan de Oliveira , Lopes Josenilton dos Santos , Oliveira Marcus Vinícius de , Abrão Bruno Souza , Silva Rosemar Batista da , Pereira Mayara Fernanda
Published: February 2025

Ligas de titânio são materiais que apresentam uma combinação características que os tornam vantajosos em aplicações aeronáuticas, sobretudo no motor e na fuselagem. No entanto, a qualidade superficial dessas ligas, após a retificação, é comprometida em função da elevada resistência mecânica, reatividade química com materiais cerâmicos e baixa condutividade térmica. Assim, é essencial avaliar as condições operacionais mais adequadas para a retificação dessas ligas com rebolos convencionais, tendo em vista que componentes como a raiz das pás de palhetas de turbinas exigem tolerâncias dimensionais IT06-IT03 e baixos valores de rugosidade. Nesse sentido, foram desenvolvidos ensaios de retificação na liga Ti-6Al-4V com diferentes valores de grau de recobrimento, Ud = 3 (condição severa) e Ud =12 (condição suave). A qualidade superficial foi analisada por meio dos parâmetros Rq e Rz, bem como imagens das superfícies retificadas por microscopia eletrônica de varredura (MEV). A partir da análise em termos da incerteza de medição foi observado que a mudança na dressagem do rebolo de uma condição severa para uma suave (maior grau de recobrimento) proporcionou uma redução de 31,50 % no parâmetro Rq e 33,64 % no Rz, e assegurou uma textura superficial mais uniforme, isto é, uma melhor qualidade superficial.
ADAPTAÇÃO DE SOFTWARE E IMPRESSORA FFF VISANDO IMPRIMIR MATERIAL COMPÓSITO DE MATRIZ POLIMÉRICA COM FIBRA CONTÍNUA
Authors: Abrão Júlia Souza , Fiocchi Arthur Alves
Published: February 2025

Os compósitos poliméricos reforçados com fibras contínuas (CPRFC), utilizados na manufatura aditiva (MA), são materiais de grande interesse na área de engenharia, visto que as fibras proporcionam melhora nas propriedades mecânicas devido a orientação seletiva do reforço na matriz, além de reduzir a densidade relativa do objeto impresso. Os desafios detectados desta pesquisa partem de limitações de acesso a essas tecnologias já que a MA de CPRFC demanda de softwares CAD-CAE-CAM e impressoras 3D específicas. Este trabalho aborda sobre CPRFC, com ênfase na análise de dados e comparação entre os softwares Aura e Cura, além de discorrer sobre os impasses tecnológicos e possíveis resoluções quanto ao desenvolvimento da MA de CPRFC. A investigação da pesquisa parte de detecção de ações projetuais através de alterações de parâmetros e adaptação de código, visando alcançar resultados semelhantes dos softwares privados em softwares FFF. Como conclusões, foram destacados a necessidade do maior desenvolvimento de pesquisas relacionadas ao tema, além de apresentar possíveis soluções para alcançar resultados semelhantes aos softwares privados utilizando os softwares direcionados a FFF, como a realização de alterações no código G, definições de novos comandos, e aplicações de estratégias partindo dos parâmetros de impressão.
ANÁLISE DOS MÉTODOS DE MONITORAMENTO DA TEMPERATURA DE EXTRUSÃO EM ENSAIOS DE IMPRESSÃO 3D
Authors: Alves Artur Martins , Carvalho Douglas da Silva , Silva Vitor Marques , Silva Leonardo Rosa Ribeiro da
Published: February 2025

Este estudo revisou cerca de 50 artigos publicados nos últimos cinco anos sobre impressão 3D, com foco no monitoramento da temperatura do bocal durante a impressão. A condução, fusão e deposição do filamento apresentam desafios que podem afetar o cabeçote extrusor, tornando essencial o monitoramento dessa etapa. As principais falhas incluem entupimento do bico, falhas no motor do filamento e deslizamento entre filamento e polia. O monitoramento ajuda na detecção de falhas na peça, melhorando a avaliação e o acabamento do produto final. Foram coletados dados sobre os materiais utilizados, relacionando a temperatura de extrusão ao ponto de fusão do material. Gráficos indicam tendências e lacunas, servindo como base para futuros pesquisadores. Observou-se que 42% dos materiais são PLA e ABS, e 65% dos estudos operam entre 140 e 240 ºC. Além disso, 53% dos estudos usam termístor da impressora e 35% utilizam câmeras termográficas para monitorar a temperatura.
MÉTODOS E PADRÕES PARA SOLDA PONTO EM AÇOS DE ALTA RESISTÊNCIA
Authors: Oliveira Júnior Mário Martins de , Magalhães Victor Augusto Nascimento , Andrade Rafael Moreira , Vilarinho Louriel Oliveira
Published: February 2025

A introdução de aços avançados de alta resistência na indústria automotiva tem impulsionado a pesquisa em soldagem por resistência, visando reduzir o peso dos veículos e melhorar a eficiência de combustível. Entender a soldabilidade desses materiais e otimizar os parâmetros do processo é crucial para aprimorar a resistência da solda. Diversas normas internacionais orientam esse processo. O conjunto selecionado para o estudo inclui diretrizes para escolha de parâmetros, eletrodos e qualidade da junta soldada. Os eletrodos devem atender aos requisitos de dureza e carga conforme as normas ISO-5821:2009 e ISO-18278-1:2015, para evitar deformação plástica, sendo necessárias forças maiores ao soldar aços de alta resistência. O alinhamento dos eletrodos deve seguir a norma ISO-18278-2:2016(E) para assegurar paralelismo e centralização. A norma AWS D8.1:2021 define a indentação máxima e o diâmetro mínimo da lentilha de solda, enquanto critérios mais conservadores para aços de alta resistência são sugeridos pela AWS-C1.1M:2019. Testes metalográficos e mecânicos, conforme ISO-14270:2016, ISO-14273:2016, ISO-14272:2016 e AWS-C1.1M:2019, são fundamentais para avaliar a junta soldada e seus modos de falha. Análises adicionais, como MEV e químicas, também podem ser realizadas.
CALIBRAÇÃO DO BANHO TERMOSTÁTICO UTILIZADO NO CONDICIONAMENTO DE CORPOS DE PROVA CHARPY
Authors: Pacheco Rafael Marques Borges , Arencibia Rosenda Valdés , Alvez Artur Martins , Ferreira Daniel Correia Freire
Published: February 2025

O ensaio de impacto Charpy é conhecido como um meio rápido, barato e facilmente executado para validação de materiais, assim como para verificação da mudança de comportamento dúctil-frágil nos aços ferríticos. O condicionamento térmico dos corpos de prova de impacto deve ser feito para garantir assertividade na elaboração da curva de transição dúctil-frágil, sendo assim esse trabalho se propõe a calibrar o banho termostático utilizado, calcular a incerteza associada à sua calibração e prover informações que auxiliarão no cálculo da incerteza associada à temperatura de transição dúctil-frágil. Para tanto, foi utilizado um sensor de temperatura já calibrado como referência. A faixa de calibração foi de - 40 °C a + 40 °C em intervalos igualmente espaçados, com 3 idas e 3 voltas para verificação da histerese. Para o equipamento em análise foi encontrado um erro sistemático a – 40 °C na faixa de -2,18 °C (5,5 %), uma repetibilidade de 0,85 °C para a mesma temperatura, histerese de 0,37 °C e erro de não-linearidade de 0,25 °C.
MICRODUREZA E MICROESTRUTURA DE UM AÇO DUAL PHASE: RELAÇÃO ENTRE A DISTRIBUIÇÃO DE FASE E PROPRIEDADES MECÂNICAS
Authors: Bonifácio Samuel Davi Vieira , Franco Sinésio Domingues
Published: February 2025

Este estudo investiga a relação entre microestrutura e microdureza de um aço Dual Phase, com foco na influência da fração volumétrica de ferrita sobre a dureza do material. Foram realizadas medições de microdureza nas direções longitudinal e transversal, complementadas por imagens das indentações e mapeamento da microdureza ao longo da espessura do corpo de prova. Os resultados mostram variações na dureza, com regiões de alta dureza correlacionando-se a menores frações de ferrita, enquanto áreas com maior presença de ferrita apresentaram durezas menores. O mapeamento de microdureza mostrou a distribuição espacial dessas variações, mostrando a importância da microestrutura na determinação das propriedades mecânicas do material.
A IMPORTÂNCIA DA TRIBOLOGIA NO ÂMBITO INDUSTRIAL
Authors: Alves Artur Martins , Carvalho Douglas da Silva , Silva Vitor Marques , Silva Leonardo Rosa Ribeiro da
Published: February 2025

Este estudo apresenta uma análise sobre a importância das crescentes pesquisas e uso da tribologia no âmbito industrial para análises de atritos e desgastes. A tribologia, que é a ciência que estuda o atrito, o desgaste e a lubrificação entre superfícies, desempenha um papel crucial em diversas áreas industriais, tais como eficiência operacional, vida útil de componentes, redução de custos e segurança e desempenho. Nota-se que a tribologia é essencial para otimização e a eficiência dos sistemas mecânicos. Além disso, a compreensão e a aplicação da tribologia ajudam também a evolução de diversos estudos que contemplem a análise de materiais e suas aplicações na indústria, bem como o estudo de materiais futuros, como nanofluidos.
SIMULATED DATA AND FEATURE ENGINEERING FOR INTELLIGENT FAULT DIAGNOSIS OF ROTATING MACHINERY
Authors: Gouveia Eduardo Borges , Jorge Amanda Rosa Ferreira , Cunha Márcio José da , Cavalini Junior Aldemir Ap.
Published: February 2025

The intelligent fault diagnosis of rotating machinery requires a large volume of training data. However, it is difficult to obtain data for damaged industrial equipment. This paper aims to explore the Rotordynamic Open-Source Software – ROSS framework to model a rotor and generate numeric fault data for data-driven methods for fault diagnostics. It was generated data from four different types of faults: crack, imbalance, misalignment, and rubbing. An MLP classifier was developed and used with some hand-selected features as input based on experienced knowledge of how those faults manifest on a signal in time and frequency. The fault-data generative method based on ROSS was applied to an MLP that receives hand-selected features and has shown a mean accuracy of 91% across all classes. This shows that the generated data and features extracted are a path that can be explored to create data-driven methods for fault diagnostics. However, it is also known that these methods depend on the assumption that the training and testing data are independently and identically distributed. In practice, though, domain shifts between the training and testing phases frequently occur.
IDENTIFICAÇÃO DE MODELO DE MOTOR CC PARA BRAÇO ROBÓTICO A PARTIR DA RESPOSTA EM FREQUÊNCIA PARA UMA ENTRADA SENOIDAL
Authors: Nobre Rafael Lins , Assis Pedro Augusto Queiroz de , Gonçalves Rogério Sales
Published: February 2025

O presente trabalho refere-se à identificação de um modelo matemático para a relação tensão de entrada e posição angular do eixo de motores de Corrente Contínua (CC) adotados na construção de um braço robótico que será acoplado a um drone. Após desenvolvido, este braço será utilizado na remoção de detritos (e.g. pipas, tênis, balões) presos em cabos para-raios em linhas de transmissão. Em particular será aplicada uma tensão de entrada do tipo senoidal no motor para identificação. Então, com base nas respostas a essa entrada, um modelo matemático será identificado por meio de análise gráfica e dos resultados. Esse modelo matemático relacionará a tensão de entrada com a posição angular dos motores, e será posteriormente adotado no projeto de um compensador para rastreamento de ângulos de referência do braço robótico.
UTILIZAÇÃO DO ALGORITMO DE FILTRO DE KALMAN E MODELOS ROSS PARA O SENSORIAMENTO VIRTUAL DE MÁQUINAS ROTATIVAS
Authors: Rezende Stanley Washington F. de , Pereira Neto Raimundo V. , Santos Maria Carolina A. de Souza , Moura Jr José dos Reis V. de , Cavallini Jr Aldemir Ap. , Steffen Jr Valder
Published: February 2025

Este estudo propõe uma metodologia para o sensoriamento virtual de máquinas rotativas, utilizando o algoritmo de Filtro de Kalman convencional combinado com um modelo de elementos finitos implementado através da biblioteca de código aberto ROSS. Dada a complexidade de modelar diretamente sistemas industriais complexos, essa abordagem se mostra relevante ao permitir o uso de modelos minimamente representativos junto com dados de medição, aprimorando as estimativas e análises da estrutura em estudo. Para validar a metodologia, foi realizado um estudo de caso numérico com um modelo de rotor, no qual sensores virtuais foram posicionados para simular condições de monitoramento real. O FK, mesmo com dados limitados dos sensores, estimou de forma eficaz as vibrações em todo o rotor. Ainda, para automatizar a escolha dos hiperparâmetros do FK, foram aplicadas técnicas de otimização, como a evolução diferencial. Os resultados demonstram que o FK otimizado previu com precisão as vibrações do rotor, confirmando a eficácia da metodologia para o monitoramento de máquinas rotativas em aplicações práticas. A abordagem proposta se mostrou eficiente e com potencial de aplicação em contextos experimentais.
NANOFLUIDOS DE AL2O3 EM TROCADORES DE CALOR: UMA BREVE REVISÃO BIBLIOGRÁFICA E ANÁLISE NUMÉRICA DE ESTUDO DE CASOS
Authors: Nascimento Erick Oliveira do , Mesa Richard Samir Hernández , Cabezas-Gómez Luben , Bandarra Filho Enio Pedone
Published: February 2025

A nanopartícula de óxido de alumínio (Al2O3) é uma das mais utilizadas para produção de nanofluidos, devido ao seu baixo custo e à facilidade na dispersão. Apesar da abundante quantidade de trabalhos sobre os nanofluidos de Al2O3, ainda se tem uma diferença considerável nas variações obtidas nas propriedades termofísicas e no desempenho termohidráulico que estão disponíveis na literatura para concentrações de nanopartículas e condições de trabalho semelhantes. Desta forma, este trabalho tem como objetivo avaliar as propriedades termofísicas de nanofluidos de Al2O3 disponíveis na literatura obtidas experimentalmente, e analisar numericamente o desempenho termohidráulico desses nanofluidos em um trocador de calor. Foi identificado que os ganhos obtidos nas propriedades termofísicas de nanofluidos de Al2O3 disponíveis na literatura não são consistentes. Dentre os trabalhos analisados, quando se considera a vazão constante, nenhum dos nanofluidos apresentaram resultados satisfatórios, enquanto que para o número de Reynolds fixo são observados incrementos acima de 40%. Portanto, neste trabalho foi identificado que os nanofluidos de Al2O3 precisam de uma metodologia de preparo mais robusta para se ter resultados mais precisos para cada tipo de aplicação. Além disso, são necessárias mais medições experimentais para o calor específico e densidade e propor novos modelos de predição dessas propriedades.
IMPLEMENTAÇÃO DE OTIMIZAÇÃO BAYESIANA PARA DEFINIÇÃO DAS TEMPERATURAS DE REALIZAÇÃO DO ENSAIO CHARPY
Authors: Oliveira Erick Tomaz , Assis Pedro Augusto Queiroz de
Published: February 2025

O ensaio Charpy é essencial para determinar a fragilidade de materiais em função da variação de temperatura e, por consequência, na avaliação da empregabilidade de materiais em projetos mecânicos. Por ser um ensaio simples e acessível, muitos laboratórios são capazes de adquirir o equipamento e de desenvolver curvas de transição dúctil-frágil (DBT – Ductile-to-Brittle Transition). Tipicamente a seleção da temperatura de ensaio é realizada manualmente e são necessários vários ensaios para caracterizar a DBT de um material adequadamente. Como alternativa à essa seleção manual, o presente trabalho propõe a implementação da otimização bayesiana para definir as temperaturas de ensaio Charpy de maneira mais eficiente em termos de ordenação e quantidade de ensaios. Para isso, um processo gaussiano é utilizado para estimar a curva DBT real. A metodologia proposta foi avaliada em dois materiais com curvas de transição distintas. Os resultados mostraram que as temperaturas definidas utilizando a combinação otimização bayesiana e processo gaussiano resultaram em uma boa reconstrução da curva DBT real com um número reduzido de ensaios.
ANÁLISE DA EFICIÊNCIA DE CICLONES EM SÉRIE PARA FILTRAGEM DE SYNGAS
Authors: Scarafiz Guilherme , Borges Valério Luiz , Lima Euclides Antônio Pereira de , Carvalho Solidônio Rodrigues de
Published: February 2025

Este trabalho teve como objetivo estudar a eficiência do uso de ciclones em série para filtragem de um gás de síntese (syngas) produzido em um reator termoquímico. A eficiência do ciclone depende de sua geometria e das características do material particulado e do fluido. A partir das caraterísticas geométricas do ciclone e das condições de operação do reator, como temperatura e pressão, é possível estimar a eficiência de cada ciclone. Considerando uma distribuição granulométrica de material particulado produzido pelo reator foi possível calcular a massa de partículas retidas no underflow de cada ciclone. Os resultados demonstraram que os ciclones em série entregam a eficiência de filtragem de 99,84% para a distribuição granulométrica testada.
TENACIDADE À FRATURA UTILIZANDO INDENTAÇÃO ESFÉRICA INSTRUMENTADA
Authors: Hwang Henry Fong , Almeida Luiz Fernando Maia de , Naves Saint Clair Alves , Bose Filho Waldek Wladimir , Franco Sinésio Domingues
Published: February 2025

A indentação esférica instrumentada se apresenta como uma possibilidade para a obtenção da tenacidade a fratura de metais dúcteis, principalmente em situações nas quais não seria possível pelas metodologias normatizadas. O objetivo deste trabalho é avaliar a aplicabilidade da metodologia da taxa de alívio de energia da mecânica da fratura, recém desenvolvida para indentação esférica instrumentada e denominada de metodologia ERR (Energy Release Rate), na determinação do parâmetro JIC, para avaliação da tenacidade à fratura de um aço AISI 4130M de aplicação no setor de extração de petróleo. Foram obtidos valores de JICSIT variando entre 14 -48 kJ/m2, sendo JIC =25 kJ/m2, medido segundo a norma ASTM E1820. A razão desta variação de JICSIT no ensaio de indentação esférica instrumentada é discutida em detalhes.
A NEW INTELLIGENT DRIVER VIGILANCE SYSTEM DESIGN USING TILT SENSORS
Authors: Zuhair Ghazi Zahid Ali , Shakir Muttair Karrar , Ahmed Shareef Oras , Ali Diwan Abbas , Baqir Taher Hazeem , Hameed Chyad Alfilh Raed , Mahmood Farhan Ahmed , Farhan Mosleh Mahmood , Arith Faiz
Published: February 2025

A significant number of causes for people killed by automobile accidents on both public and interior roads are the driver's failure to pay attention to the roadway, as well as other factors such as tiredness, sleep during driving, using the phone, or even the driver being intoxicated, etc. This work aims to identify sleepy status, pinpoint the onset of sleep, and alert the driver when their level of alertness drops below a level that does not improve productivity or the vehicle's overall safety protocols to prevent drowsiness-related crashes. In this article, we present a new method for implementing drowsiness detection inexpensively, using a Raspberry Pi as a central processor board that connects all practical measurement components. In addition, the proposed method includes the following activities: tracking the driver's head vibration while driving using tilt sensors. Moreover, a camera was mounted in front of the driver to take photos and record videos of the driver's health. As a result, the results were entirely satisfactory, and if the driver was operating the vehicle while fatigued, the response was 95% reliable and fast.
Artificial Intelligence in Robotic Manipulators: Exploring Object Detection and Grasping Innovations
Authors: Aidi Sharif Montassar , Hameed Ismael Hanan , Almani Jasim Muamar , Zuhair Jasim Farah
Published: February 2025

The importance of deep learning has heralded transforming changes across different technological domains, not least in the enhancement of robotic arm functionalities of object detection’s and grasping. This paper is aimed to review recent and past studies to give a comprehensive insight to focus in exploring cutting-edge deep learning methodologies to surmount the persistent challenges of object detection and precise manipulation by robotic arms. By integrating the iterations of the You Only Look Once (YOLO) algorithm with deep learning models, our study not only advances the innovations in robotic perception but also significantly improves the accuracy of robotic grasping in dynamic environments. Through a comprehensive exploration of various deep learning techniques, we introduce many approaches that enable robotic arms to identify and grasp objects with unprecedented precision, thereby bridging a critical gap in robotic automation. Our findings demonstrate a marked enhancement in the robotic arm’s ability to adapt to and interact with its surroundings, opening new avenues for automation in industrial, medical, and domestic applications. The impact of this research extends lays the groundwork for future developments in robotic autonomy, offering insights into the integration of deep learning algorithms with robotic systems. This also serves as a beacon for future research aimed at fully unleashing the potential of robots as autonomous agents in complex, real-world settings.
Strategi Perlakuan Akuntansi dalam Biaya Pemeliharaan dan Perolehan Aset
Authors: Roberto Josua F Hasibuan  , Rimi Gusliana Mais
Published: February 2025

This research aims to examine the application of PSAK 16 of Fixed Assets and the accounting treatment in recording asset maintenance and repair costs to maximize the value of company assets. The research methodology involves quantitative and qualitative analysis of historical data on maintenance, asset acquisition, and asset valuation from the PT.AI. The research results show that the implementation of Fixed Asset recording in companies follows the standards of PSAK 16. Fixed asset maintenance and repair costs are divided into two cost groups, namely revenue expenditure and capital expenditure. Management policy wants to recognize assets above the acquisition value of 5 million. The recommendation for companies is that material costs that have benefits for more than 1 year should be included in capital expenditure. Apart from that, this research also highlights the importance of technology integration in the maintenance process for cost efficiency and optimal increase in asset value.
Analisis Pengaruh Penggunaan Uang Elektronik Terhadap Gaya Hidup Generasi-Z di Kota Denpasar
Authors: Gde Bagus Pradipta Nandana Putu  , Putu Sri Arta Jaya Kusuma
Published: February 2025

Generation Z, known for their familiarity with technology, is increasingly using electronic money (e-money) in transactions. This research aims to analyze the influence of e-money use on the lifestyle of generation Z in Denpasar City. Data was collected through a survey of 57 generation Z respondents in Denpasar City. The research results show that the use of e-money has a significant influence on lifestyle, level of participation in social and economic activities, and perceptions about generation Z's financial management so that they do not behave consumptively. This research provides implications for stakeholders in formulating appropriate policies and programs for generation Z, as well as for generation Z themselves in managing their finances and lifestyle more wisely.
Tingkat Kepercayaan Masyarakat Terhadap Cryptocurrency Sebagai Alat Investasi
Authors: Kadek Srestiyani  , Putu Sri Arta Jaya Kusuma
Published: February 2025

Apart from conventional currency, Cryptocurrency can also be used as an investment asset. However, Cryptocurrency is famous for its high level of volatility, where this investment can produce large profits and losses in a short time. Seeing this opportunity, many people are starting to be interested in investing in this instrument. Various responses and assessments have developed in society regarding this investment, especially in Indonesia. At the beginning of its appearance, people were skeptical about the results offered. And quite a few also assume that this investment is nothing more than a fraudulent scheme. However, as time goes by, and as information spreads easily, people begin to understand and believe in this type of investment and start investing on a small to massive scale. Even now, some people still believe that Cryptocurrency investment is a scam. This research aims to collect data on how much trust the Indonesian people have in investing in Cryptocurrency. This research method uses a quantitative method, namely using primary data in the form of a questionnaire distributed to the people of Denpasar City. With a population of 30 people and a sample calculated using the Slovin formula of 30. Based on this research, the level of trust has no significant effect on cryptocurrency as an investment tool. There are many factors that influence people's confidence in investing in cryptocurrencies.
Pengaruh Blue Ecconomy terhadap Pengelolaan Keuangan di Sektor Kelautan dan Perikanan pada Kampung Nelayan Morokrembangan
Authors: Luluk Mushfiroh  , Vivi Duwi Lestari  , Aliatus Nurrochmah  , Maria Yovita R. Pandin
Published: February 2025

This research was conducted in Morokrembangan to determine the influence of the Blue Economy on financial management. The quantitative methodology used in this research was by distributing questionnaires to Morokrembangan fishermen. A total of 50 respondents participated in this research. To test the hypothesis, researchers conducted survey results via SPSS. The results of this test produced information that the Blue Economy provides financial management for Morokrembangan fishermen.
Tinjauan Atas Implementasi Prosedur Audit Kas dan Setara Kas pada Kantor Akuntan Publik di Sidoarjo
Authors: Riski Famiyanti  , Acynthia Ayu Wilasittha
Published: February 2025

The cash and cash equivalent audit procedure is a series of steps that the auditor takes to verify the existence, completeness, accuracy, and presentation of an entity's cash and cash equivalents in the financial statements. The research was carried out with the aim of understanding the process of implementing cash and cash equivalent audit procedures at the KAP Djoko, Sidik & Indra Sidoarjo Branch. The research was conducted using a descriptive analysis method by collecting two data sources, namely primary data obtained from interviews, observations and documentation directly during the audit, while secondary data was collected from several publications including articles, journals and internet sites that correspond to the research topic. The research results prove that the implementation of cash and cash equivalent audit procedures carried out at the KAP Djoko, Sidik & Indra Sidoarjo Branch for clients is in accordance with the theory put forward by Sukrisno Agoes. Through this research, it is hoped that interested parties can gain understanding and insight regarding cash and cash equivalent audit procedures in theory and real practice in the world of work.
Analisis Penerapan E-Bupot 21/26 dalam Melaporkan Pajak Penghasilan (PPH) Pasal 21 Atas Karyawan Tetap pada PT XYZ di Surabaya
Authors: Septya Asmoro Wati  , Muslimin Muslimin
Published: February 2025

This study aims to analyze the application of e-Bupot 21/26 in reporting Income Tax (PPh) Article 21 on permanent employees at PT XYZ in Surabaya. This study uses a descriptive method with a qualitative approach. Data was obtained through interviews and documentation from the company's finance and tax departments. The results of the study show that PT XYZ has implemented the e-bupot application to report Income Tax Article 21 in accordance with applicable tax regulations, but there are several obstacles faced in the reporting process. This research is expected to contribute to improving the company's tax system and increasing compliance with tax regulations.
Pengaruh Intensitas Modal, Tingkat Hutang, dan Cakupan Biaya Tetap Terhadap Tarif Pajak Efektif
Authors: Iis Stikhomah Tanjung  , Luh Nadi
Published: February 2025

This research aims to determine and test empirically the influence of Capital Intensity, Debt Equity Ratio and Fixed Cost Coverage on Effective Tax Rates. The data used in this research is secondary data. This research uses a sample of companies in the Primary Consumer Goods (Consumer Non-Cyclicals) sector listed on the Indonesia Stock Exchange in 2018 - 2022. The number of samples in this research is 33 companies with a research year of 5 years, so the total sample is 165 data. This research uses a purposive sampling method. The total sample for this research is 33 financial reports. The data analysis techniques used are descriptive statistical analysis, panel data regression model estimation, panel data regression model selection techniques, classical assumption tests, multiple linear regression analysis, hypothesis testing, and coefficient of determination with the help of the Eviews 9 program. Capital Intensity, Debt Equity Ratio and Fixed Cost Coverage simultaneously influences the Effective Tax Rate. Partially, Capital Intensity influences the Effective Tax Rate. Debt Equity Ratio have no effect on Effective Tax Rates. Fixed Cost Coverage influences the Effective Tax Rate.
Pengaruh Kinerja Lingkungan, Green Accounting, Dan Ukuran Perusahaan Terhadap Pengungkapan Corporate Social Responsibility (Studi Pada Sektor Energi Yang Terdaftar Di Bursa Efek Indonesia (BEI) Periode 2018-2022)
Authors: Nakita Salsabila T.P  , Willy Sri Yuliandhari
Published: February 2025

The concept of CSR has become a key area of focus for responsible companies, which voluntarily commit to reducing the negative impacts and increasing the positive impacts of their operations on the environment, society, and the economy. This study aims to investigate the influence of environmental performance, green accounting implementation, and firm size on the level of CSR disclosure among energy sector companies listed on the Indonesia Stock Exchange (IDX) during the period 2018-2022. This study employed a purposive sampling technique, selecting 12 leading companies in the energy sector, resulting in a sample size of 60. The collected data were analysed using panel data regression, applying the random effect model method. The analysis results demonstrate that environmental performance, green accounting, and company size collectively exert a significant influence on CSR disclosure. However, when analysed separately, only green accounting exerts a pronounced positive influence on CSR disclosure. This study offers valuable insights into the importance of green accounting in driving CSR disclosure in energy sector companies. The results of this study are expected to contribute to the development of more sustainable and socially responsible business practices, as well as encourage other companies to implement CSR principles in their operations.
Implikasi Hukum dan Etika Perbankan Syariah Terhadap Transaksi yang Terkait dengan Judi Online
Authors: Ady Riyansyah  , Miswan Ansori
Published: February 2025

Islam encourages its followers to engage in muamalah activities, which must align with its basic principles, forming a crucial foundation for business conduct. Sharia banks, representing sharia-based financial businesses, have shown positive growth trends in Indonesia. This poses a challenge for the sharia banking industry, which must ensure compliance with sharia regulations. This research, a library study, involves collecting references from journal articles. Library research uses literature, including books, notes, and previous research reports. In Indonesia, online gambling is strictly prohibited by Law No. 7 of 1974 on Gambling Control. However, online gambling is becoming increasingly popular among Indonesians due to its convenience, with some sites facilitating payments through sharia bank accounts. To tackle this issue, sharia banking must enhance supervision and enforce strict regulations to prevent the misuse of services for online gambling. This study contributes significantly to understanding the legal and ethical implications of sharia banking concerning transactions related to online gambling. By highlighting the prohibition of gambling in Islam and its application in the digital age, this research provides a new perspective that integrates religious values with modern technological challenges.
The Impact of Companies not Implementing Corporate Social Responsibility on Financial Performace : Literature Review
Authors: Salsabila Alya Maharany  , Sofinatus Solikhah  , Hwihanus Hwihanus
Published: February 2025

This research was conducted to determine the impact of the influence of Corporate Social Responsibility (CSR) on financial performance in several countries. This research was conducted with the aim of comparing the results of research on the influence of corporate social responsibility on financial performance in various countries and industries. The method used in this research is meta-analysis using qualitative methods in the form of international journals from several countries including India, China, Thailand, United States Kingdom. The results showed that CSR does not always provide consistent results. This study concludes that although Corporate Social Responsibility (CSR) on financial performance has a positive correlation, it is still considered trivial by companies in various countries.
Pengaruh Carbon Emission Disclosure, Carbon Performance, dan Green Intellectual Capital Terhadap Kinerja Keuangan Perusahaan
Authors: Willy Sri Yuliandhari  , Rezma Aulia Ramadhanty
Published: February 2025

This study analyzes the effect of carbon emission disclosure, carbon performance, and green intellectual capital on the financial performance of companies in the mining sector listed on the Indonesia Stock Exchange (IDX) in the period 2018-2022. Using a purposive sampling method, 8 companies with 40 observations were selected, but three data contained outliers, resulting in 37 observations. The results of descriptive statistical analysis and panel models with Eviews version 12 show that simultaneously, the three factors have a significant effect on the company's financial performance. Partially, carbon emission disclosure has a significant negative effect on financial performance, while carbon performance and green intellectual capital have a significant positive effect. This study suggests that companies improve carbon performance and green intellectual capital in order to strengthen relationships with the community or investors, which in turn can improve financial performance.
Peningkatan Kesadaran Masyarakat Tentang Pentingnya Kebersihan Lingkungan Melalui Penyediaan Tempat Pembuangan Sampah Di Desa Lembah Sari Kecamatan Batu Layar
Authors: Dini Andriani  , Lisa Andriani  , Nurmaya Nurmaya  , Erlin Erlin  , Adriana Wahyuningsi  , Inong Febrianti  , Rahmad Hidayat  , M. Ulfatul Akbar Jafar
Published: February 2025

The problem of waste has often been discussed in various fields, which is a complicated problem for people who are less concerned and less sensitive to environmental pollution. A clean and healthy environment is very important for welfare, especially for the people of Lembah Sari Village, West Lombok Regency. Like in many other places, the issue of environmental cleanliness is often a major concern. This is the background for the author to carry out Real Work Lecture service in one of the villages in the Batu Layar sub-district, West Lombok Regency, namely Lembah Sari Village. The method for implementing this activity program is: preparation stage, implementation stage, final stage. This community service activity in Lembah Sari Village is where the community is very happy with the provision of making rubbish bins in their village environment and it is very helpful in changing their mindset about the importance of keeping the environment clean. It is hoped that in the future this community service will continue to pay attention to maintaining environmental cleanliness, the habit of throwing rubbish away and leaving it there needs to be changed.
Sosialisasi Pencegahan Bahaya Rabies dan Penaggulangan Pernikahan Anak di Usia Dini di Kabupaten Bone
Authors: Amali Febrian Zulfiansyah , Dandi Dandi  , Mutiara Mutiara  , Eva Eva  , Mutiara Aprilia  , Ridwan Ridwan  , Muh. Amin Amir  , Rifki Kurniawan  , Hasriliandi Halim
Published: February 2025

Rabies can attack all types of warm-blooded animals and humans. Symptoms of rabies in humans usually begin with fever, headache, difficulty swallowing, fear of water, sensitivity to wind and sound stimuli and end in death. Control of rabies is generally done by vaccination and elimination of stray/wild dogs, in addition to socialization programs and supervision of rabies-transmitting animal traffic (HPR). While in early marriage, it has a negative impact on teenagers and when living in a family, early marriage can be caused by several   factors,   namely,   social   factors,   economic   factors, educational factors. Prevention of early marriage can be done by providing education about the dangers and impacts of early marriage