bluuebunny/crossref_metadata_2025 huggingface dataset:
Estudio de convergencia por análisis de elementos finitos en tejido óseo cortical
Authors: Gómez Ruiz Nino J. , Vergara Paredes Mary Josefina , Alvarado Contreras José A.
Published: November 2024

En las recientes décadas se publican investigaciones sobre simulaciones óseas en las que se utiliza el método de los elementos finitos para estimar las propiedades mecánicas o el comportamiento del tejido ante determinadas cargas. En todas estas investigaciones es esencial conocer con la mayor exactitud posible el comportamiento mecánico de este material biológico. En esta investigación se analizó la convergencia de los resultados numéricos obtenidos de las simulaciones de estructuras óseas digitales mediante el método de los elementos finitos, con el fin de proporcionar una metodología eficiente. Se construyeron probetas de tejido cortical bovino, a las cuales se les practicaron tomografías computarizadas para la generación de la geometría y la asignación de propiedades mecánicas. Se desarrollaron simulaciones variando el tamaño de la malla con el fin de describir la convergencia por esfuerzo, carga y energía de deformación versus número de elementos. La convergencia de las simulaciones a tracción se comporta independiente de las propiedades asignadas como material isotrópico u ortotrópico. Las simulaciones a compresión de estructuras completas con canal medular y el uso de elementos hexaédricos en muestras cúbicas, redujo significativamente el número de elementos necesarios para lograr la convergencia en comparación con el empleo de estructuras completas sin canal medular y el empleo de elementos tetraédricos en muestras cúbicas, respectivamente. La convergencia de los diferentes modelos óseos es más lenta por esfuerzo y energía de deformación versus número de elementos. Se sugiere una metodología eficiente para la simulación de estructuras óseas computacionales mediante el método de los elementos finitos para la obtención de resultados confiables.
Análisis de la influencia del uso de fluido de corte en procesos híbridos de mecanizado y aporte por láser
Authors: Cortina Magdalena , Arrizubieta Arrate Jon Iñaki , Ruiz José Exequiel , Ukar Arrien Eneko , Lamikiz Mentxaka Aitzol
Published: November 2024

A medida que la presión a nivel global en el ámbito de la producción aumenta, hay una mayor tendencia a procesos que proporcionan flexibilidad y eficiencia, a la vez que mantienen la calidad del producto final. Una de las tendencias actuales es la integración de distintos procesos en una misma máquina, dando lugar a las denominadas máquinas híbridas. Un ejemplo de máquina híbrida es la integrada por fabricación aditiva y mecanizado. Una de las limitaciones existentes en la combinación de procesos de mecanizado y aporte láser se deriva de la presencia de fluido de corte en la pieza como consecuencia del mecanizado, contaminando la superficie de aporte. En consecuencia, el presente trabajo analiza la influencia del empleo de fluido de corte y sus posibles efectos adversos en procesos híbridos de mecanizado y aporte láser. Para ello, se realizan diversos aportes sobre una pieza previamente mecanizada, tanto directos en presencia de fluido de corte, como tras la limpieza de la superficie de la misma mediante diferentes métodos. Por último, se lleva a cabo un análisis de la integridad metalúrgica de cada aporte y se evalúan los defectos que aparecen en ellos. De este modo, puede establecerse una relación entre el uso de fluidos de corte durante el mecanizado y la calidad del aporte posteriormente realizado.
Redução do tempo de troca de moldes com smed - single minute exchange of die and tool em uma indústria de calçados
Authors: Trombeta Plínio , Souza José de , Volcanoglo Biehl Luciano , Braz Medeiros Jorge Luiz
Published: November 2024

Este artigo apresenta uma pesquisa aplicada com a aplicação de uma ferramenta para reduzir o tempo de troca de moldes (setup) aplicando a metodologia SMED - Single Minute Exchange of Die and Tool. Com o objetivo de aumentar a flexibilidade e a produtividade com investimento mínimo a pesquisa foi aplicada em um setor de componentes para calçados que produz a parte superior do tênis, cabedal, em indústria de calçados. Considerando os problemas de um setor de injeção de termoplástico TPU (Thermoplastic polyurethane) sobre tecido foi efetuada uma análise de como reduzir os tempos de troca de molde, e melhorar estes tempos para agilizar a produção de pequenos lotes com o menor índice de desperdício de material e de mão de obra. Os resultados obtidos com a aplicação do SMED foi um ganho significativo no setup além de melhores índices de produtividade, redução de matéria prima na construção do ferramental e ganhos de matéria prima no processo produtivo do componente. A implantação do projeto agregou qualidade ao produto e a empresa obteve um ganho de tempo na troca do molde de 82,60% resultando no aumento da produção em 9.592 pares/mês equivalente a 16,77 % a mais do que era produzido antes da implantação do SMED.
Uso de feramentas CAD para projetos de componentes soldados
Authors: Zoffoli Gianluca Giovanni , Neto Jose Alves da Silva , Oscare Giacaglia Giorgio Eugenio
Published: November 2024

O objetivo desta dissertação é demonstrar a utilização de ferramentas CAD para criação de estruturas soldadas de uma maneira geral e como podem auxiliar, facilitando a etapa de desenvolvimento de projeto mecânico. Os métodos utilizados foram além de pesquisa bibliográfica, principalmente a utilização da metodologia aplicada, demonstrando passo-a-passo da utilização das ferramentas para realização das etapas de projetos. Através da análise dos resultados obtidos foram verificados benefícios para o desenvolvimento de componentes de estruturas soldadas, como, além de armazenamento de informações sobre os componentes estruturais; como medidas, propriedades mecânicas dos materiais, posicionamentos, automação de detalhamentos e outros detalhes que contribuem para qualidade, tempo e lucratividade. Concluiu-se também, que com as etapas sugeridas, é possível criar modelos que podem ser configurados e utilizados para estabelecer metodologias adequadas de desenvolvimento dos projetos, como boas práticas para execução de projetos mecânicos.
Modelo de reparto de carga y error de transmisión para engranajes helicoidales con rebaje de punta
Authors: Pedrero José Ignacio , Pleguezuelos González Miguel , Sánchez Sánchez Miryam Beatriz
Published: November 2024

El inicio del contacto, en la cabeza del diente conducido, de cada sección transversal de un engranaje helicoidal se produce en condiciones de carga distintas, pues la longitud de la línea de contacto varía con la posición de engrane, por lo que la rigidez de engrane y la carga por unidad de longitud varían de forma congruente. Esto supone una diferente deformación de los dientes y, por tanto, un adelanto del inicio efectivo de contacto distinto para cada sección transversal, lo que inevitablemente se traduce en que un rebaje de punta, cualquiera que sea, sólo será adecuado para absorber esa deformación al inicio del contacto en una -o unas cuantas- secciones transversales, pero será escaso o excesivo en todas las restantes. En este trabajo se presenta un modelo sencillo para el cálculo de la rigidez, el reparto de carga y la deformación en engranajes helicoidales con rebaje de punta, que incluye la simulación del inicio del contacto en las secciones transversales en las que la profundidad de rebaje no se ajusta a las condiciones instantáneas de carga.
Metodología para el estudio mediante simulación numérica de la adaptación del stent de una prótesis valvular aórtica al área de implantación
Authors: Suárez García Sofia , López Campos José Ángel , López García Irea , Agudo del Rio David , Segade  Robleda Abraham , González Baldonedo Jacobo
Published: November 2024

En este trabajo se presenta una metodología para el estudio mediante simulación numérica de la capacidad de adaptación de la estructura soporte (stent) de las prótesis valvulares aórticas empleadas en el procedimiento de implantación valvular aórtica transcatéter (TAVI) a la anatomía particular de un paciente concreto. El procedimiento de TAVI es una práctica habitual en pacientes con enfermedades degenerativas de la válvula aórtica, como la estenosis valvular, que no pueden ser intervenidos mediante métodos convencionales para la sustitución valvular por el elevado riesgo de la operación. Durante este proceso, la prótesis valvular es introducida por medio de un catéter hasta el lugar de implantación. Es por ello que el éxito de la intervención, así como la durabilidad y efectividad de la prótesis, dependen en gran medida de la adaptación del stent a la cavidad aórtica donde se aloja. Una adaptación defectuosa puede conducir a reducciones severas en la vida útil del dispositivo y, además, provocar pérdidas de estanqueidad que se traducirán en reflujos de sangre hacia el ventrículo. Para estudiar la adaptación de la estructura soporte se establece un procedimiento mediante el cual, a partir de simulación numérica mediante elementos finitos (FEM) se permite evaluar aspectos tales como las áreas de contacto entre ambos y la tensión y deformación en estos componentes. Para ello se extrae por medio de imagen médica de la anatomía de la raíz aórtica de cada paciente y se construye un modelo de elementos finitos con ella. Este modelo se complementa con el modelo de elementos finitos generado para el stent, previamente validado. Se genera entonces un modelo completo que evalúa la interacción entre la arteria y el stent y que permite valorar aspectos tales como las áreas de contacto entre ambos y la tensión y deformación en estos componentes
Influencia de la profundidad de rebaje en la rigidez, reparto de carga y error de transmisión de engranajes rectos con desgaste
Authors: Sánchez Myriam B. , Pleguezuelos Miguel , Pedrero José I.
Published: November 2024

En engranajes de transmisión de potencia, la geometría de las superficies en contacto tiene influencia en la rigidez de engrane y el error de transmisión, que a su vez es origen de sobrecarga dinámica, ruido y vibración.
Las alteraciones en la geometría de los perfiles, como el rebaje de punta para evitar el impacto de inicio de engrane o el desgaste que inevitablemente se presenta en el contacto deslizante entre superficies friccionantes, tienen por tanto influencia en el comportamiento dinámico de la transmisión. En este trabajo se presenta un estudio de la influencia de la profundidad de rebaje en el error de transmisión de engranajes rectos con desgaste. Se analiza la evolución de la amplitud pico-pico, factor que determina la sobrecarga dinámica inducida, con el número de ciclos de desgaste. El análisis considera profundidades de rebaje mayores y menores que el valor ajustado para la eliminación del impacto de inicio de engrane, así como rebajes simétricos (a la entrada y a la salida del engrane) y asimétricos (sólo a la entrada), aplicado a engranajes estándar y de alto grado de recubrimiento. Se analiza específicamente el caso de rebaje simétrico con longitud de rebaje óptima para mínima amplitud de error de transmisión y se estudia la profundidad de rebaje óptima para amplitud mínima tras determinado número de ciclos de desgaste
Predicción de la composición de gases en un gasificador downdraft a partir de residuos de madera de algarrobo: un enfoque matemático
Authors: D´Espaux Shelton Elbis
Published: November 2024

En este trabajo se presentan las herramientas para el desarrollo de un modelo matemático que favorece el cálculo de los procesos termoquímicos que ocurren en el interior de un gasificador downdraft y que permite predecir la composición de los gases generados a la salida del reactor usando residuos de madera de Algarrobo a partir de la composición termofísica de la biomasa, la temperatura del lecho y otras propiedades. Para ello se vale del planteamiento de las ecuaciones de balance de energía y de especies empleándose el método de numérico de diferencias finitas con lo cual se logra mayor precisión de la composición del gas generado. Esto permitirá elevar la calidad del gas que se produce teniendo en cuenta el aumento de su valor calórico y la disminución de su contenido de alquitrán, a partir del control de la cinética de las reacciones y considerando además el tamaño de la biomasa.
Desenvolvimento de Tratamentos Térmicos para Peças Estruturais Injetadas em Ligas de Alumínio
Authors: Soares Gonçalo , Silva Rui Pedro , Gomes Rui , Madureira Rui , Neto Rui , Reis Ana , Babo Tiago , Figueiredo Daniel , Guimarães Bruno , Davim João Paulo
Published: November 2024

Com o intuito de minimizar o peso dos veículos, cada vez mais são utlizadas peças em ligas de alumínio produzidas por fundição injetada. Contudo, devido às elevadas velocidades de injeção durante o processo de HPDC, ar fica aprisionado no metal líquido, originando porosidades nos componentes. Estas porosidades gasosas impossibilitam a realização de tratamentos térmicos devido ao fenómeno de “blistering”. Assim, o trabalho realizado centra-se no desenvolvimento de tratamentos térmicos (T5 e T6 relâmpago) em peças obtidas pelo processo de HPDC assistido por vácuo, recorrendo às ligas AlSi10MnMg e AlSi10Mg(Fe). As peças foram caracterizadas tendo em consideração a ocorrência de “blistering”, microestrutura e propriedades mecânicas alcançadas. Adicionalmente, foi avaliada a maquinabilidade da liga primária AlSi10MnMg, recorrendo a uma ferramenta com PCD produzida por fabrico aditivo, sendo esta comparada com a da liga convencional AlSi9Cu3(Fe). Para todas as combinações de parâmetros usadas no tratamento térmico de solubilização verificaram-se “blisters” nos componentes. Com o tratamento térmico T5 não houve formação de “blisters” e a resistência mecânica aumentou. Em termos de maquinabilidade da liga primária AlSi10MnMg, esta apresenta uma rugosidade superficial ligeiramente superior e forças de corte inferiores, comparativamente à liga de injeção convencional AlSi9Cu3(Fe).
Effectiveness of a novel ex vivo training model for gastric endoscopic submucosal dissection training: a prospective observational study conducted at a single center in Japan
Authors: Toba Takahito , Ishii Tsuyoshi , Sato Nobuyuki , Nogami Akira , Hojo Aya , Shimizu Ryo , Fujimoto Ai , Matsuda Takahisa
Published: November 2024

Background/Aims: The efficacy of endoscopic submucosal dissection (ESD) for early-stage gastric cancer is well established. However, its acquisition is challenging owing to its complexity. In Japan, G-Master is a novel ex vivo gastric ESD training model. The effectiveness of training using G-Master is unknown. This study evaluated the efficacy of gastric ESD training using the G-Master to evaluate trainees’ learning curves and performance.Methods: Four trainees completed 30 ESD training sessions using the G-Master, and procedure time, resection area, resection completion, en-bloc resection requirement, and perforation occurrence were measured. Resection speed was the primary endpoint, and learning curves were evaluated using the Cumulative Sum (CUSUM) method.Results: All trainees completed the resection and en-bloc resection of the lesion without any intraoperative perforations. The learning curves covered three phases: initial growth, plateau, and late growth. The transition from phase 1 to phase 2 required a median of 10 sessions. Each trainee completed 30 training sessions in approximately 4 months.Conclusions: Gastric ESD training using the G-Master is a simple, fast, and effective method for pre-ESD training in clinical practice. It is recommended that at least 10 training sessions be conducted.
DO 2.5D PARA O 2D: ESTUDO DAS ADAPTAÇÕES DE JOGOS DE LUTA PROFISSIONAIS PARA M.U.G.E.N.
Authors: Lopes Ricardo Cortez
Published: November 2024

A indústria de videogames é, atualmente, uma das mais ricas do ponto de vista financeiro, e um jogo precisa de um grande investimento inicial por parte dos estúdios para ser iniciado, terminado e comercializado. Paralelo a essa atividade existe uma série de desenvolvedores, entre eles os especializados na Engine de jogos de luta M.U.G.E.N., que transportam conteúdos de muitos jogos desenvolvidos para uma engines que trabalham em 2 dimensões (2D). Selecionamos para o nosso estudo 3 grandes jogos de luta (2.5D) que foram adaptados para o M.U.G.E.N.: Street Fighter IV, Dragon Ball Figtherz e Mortal Kombat (IX, X e XI), que possuem equivalentes na versão M.U.G.E.N.. A partir das categorias introdução, cenário e estágios, que são os elementos comuns a todos os 6 jogos, realizamos uma comparação, selecionados de acordo com a temática do dragão, que é comum a todas as franquias.
Helping Children Become Summer Bookworms
Authors: Gill Jennifer
Published: November 2024

READS is a summer read-at-home program that gives children free books coupled with key supports. Research suggests the program can help students sharpen their reading skills.
IMPACT OF ICT ON ECONOMIC GROWTH: CASE OF OECD AND MENA COUNTRIES
Authors: Leila Ben Ltaief
Published: November 2024

This article examines the direct effects of Information and Communication Technologies (ICT) on economic growth in the presence of four important indicators: the rates of Internet, telephone, and mobile usage, as well as the proportion of technologically-related imports in total imports. In order to achieve our stated objectives, we undertake a rigorous evaluation of the interaction impact between the ICT factors, human capital, and financial development for the four specifications that are under consideration. A comparison analysis between the OECD countries and those of the MENA area was conducted between 2010 and 2023, employing the generalized moment's method in dynamic panels. Our findings demonstrate that the impact of ICT is predominantly influenced by financial and human capital growth. This study reveals that OECD countries have been more proactive and effective than MENA countries in embracing ICT to foster economic growth. Examining the case of MENA countries provides comprehensive insight for policymakers regarding the relevance of ICT in boosting economic growth through the advantages of technology expansion. JEL classification : O32, O33, O47, O57.
Flagging Trusted Flaggers
Authors: Ruschemeier Hannah
Published: November 2024

Nachdem die Bundesnetzagentur den ersten vertrauenswürdigen Hinweisgeber (Trusted Flagger) benannt hat, werden Vorwürfe der Zensur, übermäßigen Einschränkung der Meinungsfreiheit und fehlenden Erforderlichkeit solcher Stellen laut. Dabei ist das Konzept der Trusted Flagger keinesfalls neu oder eine Idee das DSA und das Vorgehen gegen illegale Inhalte im Netz weiterhin eine große Herausforderung in demokratischen Gesellschaften. Der DSA schafft klare Vorgaben für Trusted Flagger und transparente Verfahren.
Giant-thermopower ionogels for multifunctional energy harvesting through molecularly selective ionic pairing and hydrogen bonding
Authors: Yin Yisi , Lin Shangchao , Xu Ziyao , Wang Zhemin , Tan Ting , Zhao Changying
Published: November 2024

Ionogels are emerging multifunctional materials for low-grade energy conversion and storage due to their high thermopowers, low costs, and facile productions. However, the thermoelectric synergy between ion-ion and polymer-ion interactions at the molecular level remains unexplored. Here, thermopower of ionogels composed of PVDF-HFP and EMIM:TFSI are enhanced from 5.3 to 21.2 mV/K by molecularly tailoring Coulombic and Lewis acid-base interactions. First, doping the ionogels with sodium bis(trifluoro-methylsulfonyl) imide (Na:TFSI) can greatly improve the thermopower. This improvement is ascribed to the stronger Coulombic interactions between the doped Na+ and TFSI-, which selectively induces the formation of [Na:(TFSI)n]1–n contact ion pairs, blocks the migration of TFSI-, and increases the difference in mobilities between EMIM+ and TFSI–. Second, large amounts of hydrogen bonds are selectively formed between the terminal hydroxyl groups (-OH) in the added polyethylene glycol (PEG) and EMIM+. The Lewis acid-base interaction between the O˙ with lone-pair electrons in -OH of PEG and the acidic protons in EMIM+ is critical in promoting the heat of transport of EMIM+, which further increases the thermopower. In terms of applications, we demonstrate the potential of ionogels in multifunctional energy harvesting with high thermovoltages, including thermoelectric supercapacitors, highly sensitive thermal sensors, and thermoelectric ionogel-based triboelectric nanogenerators. Overall, this work offers molecular insights into Coulombic and Lewis acid-base interactions for enhancing thermopowers of ionogels, also broadening their applications in low-grade energy harvesting and self-powered electronic devices.
Mendelian randomization reveals shared genetic landscape in autism spectrum disorder and Alzheimer's disease
Authors: Lee Jenu , Sik Seong Ihn
Published: November 2024

Autism Spectrum Disorder (ASD) and Alzheimer's Disease (AD) represent the most common neurodevelopmental and neurodegenerative disorders, respectively. ASD and AD are considered disparate diseases given the differences in age at manifestation and disease phenotypes. However, AD may be related to ASD, as recent studies showed that adults with ASD are 2.5 times more likely to develop AD than age-matched controls without ASD. While some studies have implicated environmental factors in ASD-AD comorbidity, it is unknown whether genetics play a role in the increased risk of AD in ASD. Here, we hypothesized that the shared genetic factors are responsible for an increased risk of AD in ASD. To determine whether ASD and AD are genetically linked, we preformed genome-wide association studies (GWAS), revealing genomic loci across the human genome that are associated with ASD or AD. Subsequently, we performed Mendelian randomization (MR) analysis to evaluate the causal effect of ASD (exposure) on AD (outcome). Interestingly, MR analysis showed significant horizontal pleiotropy, suggesting the existence of shared genetic components between ASD and AD. In support, variant-to-gene mapping and gene ontology analysis showed that pathways involved in synaptic regulation were significantly enriched in both ASD- and AD-associated SNPs. Together, these data imply that shared genetic factors related to synaptic regulation may contribute to an increased risk of AD in individuals with ASD, providing insights into underlying disease mechanisms.
Judėjimo negalią turintis paauglys šeimos socialiniame lauke
Authors: Matulionis Arvydas V. , Subačiūtė Jurgita
Published: November 2024

Remiantis prancūzų sociologo Pierre Bourdieu sociologine teorija, laukas ir habitus sąvokomis, straipsnyje sociologiniu požiūriu analizuojama judėjimo negalios paliesta paauglystė, paauglio habitus formavimasis šeimos socialiniame lauke.Judėjimo negalios apsunkintas kūnas ne tik riboja judėjimo negalią turinčių paauglių fizinę laisvę, bet ir turi reikšmingos įtakos paauglio socializacijos procesui šeimoje bei šeimos narių tarpusavio santykiams. Judėjimo negalią turintys paaugliai dažnai dėl savo negalios ribojamų fizinių galimybių laikomi silpnesniais. Jais stengiasi pasirūpinti tėvai, globėjai ar kiti sveiki šeimos nariai. Negalią turintys paaugliai dažniau nei suaugusieji yra veikiami aktyvios neigimo psichologijos, kai akcentuojama, kad jis negali, nemoka, nesugeba. Tai lemia jo savistigmatizaciją, trukdančią atskleisti, įvertinti bei realizuoti savo turimas realias galimybes. Paauglio negalia kelia daugybę iššūkių visai šeimai. Ji paveikia ne tik šeimos sistemos schemą, bet tėvo ir motinos kaip poros egzistenciją. Užmirštami bendri poros ir asmeniniai siekiai, koncentruojamasi tik į vaiko negalią, globos ir pagalbos teikimą jam. Paauglio negalia turi įtakos ne tik jo, bet ir šeimoje augančių sveikų vaikų socializacijos procesui. Kai tėvai, giminaičiai daugiau dėmesio skiria negalią turinčiam paaugliui, kiti (sveiki) vaikai dažniau jaučiasi atstumti, mažiau mylimi.Patirtas judėjimo neįgalumas itin paveikia paauglio socializaciją. Jei socializacijos pradžioje įgimtas neįgalumas vaiko suvokiamas kaip savaime suprantamas, tai vėliau, išėjus už šeimos lauko ribų, susiduriama su neįgalumo stigmatizacija, ir trauma ar liga drastiškai nutraukia socializacijos procesą. Ypač skausmingas pokytis, nubraukiantis besikaupiančią gyvenimišką patirtį, įvyksta patyrus negalią paauglystėje, kai skyla habitus.
Tautinių stereotipų kaita Lietuvoje pastarąjį dešimtmetį: studijuojančio jaunimo empirinis tyrimas
Authors: Antinienė Dalia , Lekavičienė Rosita
Published: November 2024

Straipsnyje pristatomi pastarąjį dešimtmetį įvykę stereotipinių vaizdinių apie įvairių tautų (lietuvių, vokiečių, rusų ir kt.) charakterio bruožus poslinkiai. Lietuvos studijuojančio jaunimo sąmonėje susiformavę apibendrinti lietuvių ir kitataučių stereotipai buvo tirti 2003, 2008 ir 2015 metais. Šiuo laikotarpiu pastebimai kito politinė situacija, tarptautiniai santykiai, todėl buvo galima tikėtis ir tautinės stereotipizacijos kaitos. Gauti tyrimo rezultatai tai patvirtino: neigiamas rusų tautos stereotipiškumo rodiklis pastebimai pakilo, o teigiamas krito; žydų tautos stereotipas, sprendžiant pagal teigiamo ir neigiamo stereotipiškumo vidurkių poslinkius, pastarąjį dešimtmetį nuolat gerėjo; ir kt. Tyrimai atskleidė ir studijuojančio Lietuvos jaunimo autostereotipo kaitą: tautinis autoportretas netapo labiau pozityvus; jame išryškėjo kritusį socialinį aktyvumą nusakantys bruožai.
The Effect of Competence and Compensation on Employee Performance at the Tangerang Area Swamitra Savings and Loan Unit
Authors: Alidin Alidin , Ridwan Muhammad
Published: November 2024

This study aims to examine and analyze the influence of competency and compensation on employee performance at the Swamitra Credit Union Unit in the Tangerang area. This quantitative research uses primary data obtained from questionnaires distributed to employees of the Swamitra Credit Union Unit in the Tangerang area. The sampling technique used is saturated sampling, meaning all members of the population are used as samples, totaling 80 respondents. The data were analyzed using validity tests, reliability tests, classical assumption tests, multiple linear regression tests, hypothesis tests, determination tests, and path analysis using SPSS (Statistical Package for the Social Sciences). The partial test results show that competency has a significant effect on employee performance with a t-value of 3.441 (3.441 > 1.991) and a significance value of 0.001 (0.001 < 0.05). Compensation also significantly affects employee performance with a t-value of 4.473 (4.473 > 1.991) and a significance value of 0.000 (0.000 < 0.05). Simultaneously, competency and compensation significantly influence employee performance with an F-value of 30.803 (30.803 > 3.11) and a significance value of 0.000 (0.000 < 0.05). This study is expected to provide additional references regarding competency, compensation, and employee performance
ANALISIS FAKTOR PENENTU LABA DALAM PERHITUNGAN HARGA POKOK PENJUALAN DI RESTORAN KEMBANG GOELA, PT NUSANTARA BOGA ABADI, JAKARTA SELATAN.
Authors: Oktaviani Riri , Krisanti Imelda , Gustiyanti Ferra , Sukardi Sukardi , Herawati Tuti , Saksana Joned C , Hidayatullah Syarif
Published: November 2024

This research aims to analyze the implementation and acquisition of sales and cost of goods sold on food menus at PT Nusantara Boga Abadi to calculate net sales profit. This research serves as a benchmark to determine whether the profit margin obtained by the company is optimal. The data used are secondary data in the form of raw material purchases. The method used is descriptive analysis with a quantitative approach. PT Nusantara Boga Abadi operates in the food industry, and the focus of this research is "how to determine the final cost of goods sold at the Kembang Goela Restaurant." This research employs field and library research methods. Data collection is conducted through observation, interviews with stakeholders, documentation, and literature studies. The collected data is then analyzed using the Full Costing method to determine the cost of production, which subsequently serves as the basis for setting the selling price. The analysis results indicate that the application of the Full Costing method in determining the cost of production yields favorable outcomes, enabling profit increase by accounting for all cost elements. The findings of this research are expected to provide valuable insights for the management of Kembang Goela Restaurant to enhance profitability and maintain business sustainability.
ANALISIS BIAYA PRODUKSI DAN PENGELOLAAN PERSEDIAAN PADA PERUSAHAAN PT NOORE SPORT INDONESIA DI KOTA BANDUNG
Authors: Febrianti Keukeu Safitri , AR Rasmawati
Published: November 2024

Effective production cost management is crucial for determining competitive selling prices, especially when facing competitors offering similar products at affordable prices. Inventory management plays a vital role in the sales process, making it essential for companies to manage and monitor their inventory effectively. This research addresses the challenges faced by companies regarding suboptimal production cost calculations and inadequate inventory management, leading to stock shortages. The study aims to analyze the practices employed by companies to optimize production costs and manage inventory efficiently, thereby maintaining product quality and responding to market changes. The focus is on understanding how companies identify, measure, and control production costs and manage inventory efficiently. The research employs descriptive and quantitative methods, including observations, interviews, and documentation related to production cost reports and inventory data. The findings indicate that current company policies are not optimal and lack efficiency. This study compares the company's production cost calculations with the full costing method and applies the Economic Order Quantity (EOQ) method for inventory management to enable efficient inventory control. The implications suggest that adopting these methods can significantly improve production cost management and inventory efficiency, providing a competitive edge in the market
Meningkatkan Literasi Investasi Syariah Pada Pelajar Smk Nusantara Tangerang Selatan
Authors: Candra Hendra , Fahri Fahri , Kohar Abdul
Published: November 2024

Sharia investment is a form of financial management that is in accordance with Islamic principles, which not only pays attention to financial benefits but also considers ethical and moral aspects. This research aims to provide understanding to students of SMK Nusantara Tangerang Selatan regarding sharia investment and can also be a recommendation for educational institutions in integrating Islamic financial education into their curriculum. This study uses a qualitative approach with a case study method with  an exploratory descriptive research design. The population of this study is all students of SMK Nusantara in South Tangerang and the sampling is done using the purposive sampling technique. The analysis technique uses thematic analysis techniques with the analysis process starting with the transcription of the results of interviews and observations, followed by a coding process to identify the main themes that emerge from the data. The results of the study show that students of SMK Nusantara in South Tangerang have a fairly good understanding of the basic concept of sharia investment and in general, students show a very positive attitude towards sharia investment. They believe that sharia investment is safer and in accordance with religious values. Students who receive support and guidance from teachers and families show a better understanding of sharia investment
Pengaruh Work-Life Balance Dan Work Engagement Terhadap Kepuasan Kerja Implikasinya Terhadap Kinerja Amil (Studi Pada Laznas Baitul Maal Hidayatullah Jakarta)
Authors: Humaini Humaini , Upe Rachman , Thaha Abbas
Published: November 2024

One of the keys to the change and progress of philanthropic institutions lies in human resources and digital infrastructure based on technology. This research intends to look at the impact of Work-life Balance and work engagement on Job Satisfaction and its implications on Amil's performance. This scientific work uses a quantitative approach, this research was carried out on all amil with a sample of 52 amil using the Slovin formula. The sampling method uses a probability sampling approach with the Simple Random Sampling technique. The analysis technique of this study uses Partial Least Square (PLS) and the F SPSS test. From the results of the hypothesis test, it is known that 1. Work-life balance has a positive and significant effect on job satisfaction. Second, Work Engagement has a positive and significant influence on job satisfaction. 3 Work-life balance and work engagement together affect job satisfaction. The 4th Work-life Balance has a positive and significant effect on performance. 5. Work engagement has a positive and significant effect on Performance. 6 Job satisfaction affects the performance of the amil. 7. Work life balance, work engagement affects performance simultaneously through job satisfaction. This research can be used as a reference to improve and maintain work-life balance, work engagement, job satisfaction, and performance.
Kepemimpinan Kepala Sekolah Dalam Peningkatan Kinerja Profesional Guru (Studi Pada Sdit As Saman Kecamatan Jati Agung Kabupaten Lampung Selatan)
Authors: Dwi Rahmawati Fitri , Firdaus Adhy , Ceilendra Saksana Joned
Published: November 2024

This study uses a descriptive qualitative approach. Data collection is carried out by means of observation, interviews and documentation. The data analysis techniques used are triangulation of data collection methods and triangulation of places. This study discusses the leadership of the head of SDIT ASSAMAN in improving teacher professional performance. The problem that occurs is that teachers as the driving force of education still do not master technology so that learning is often hampered and lagging behind other schools. This research involved 5 resource persons consisting of principals, teachers and staff. The results of the study show that teachers who do not master technological developments are not the only factor inhibiting education in school institutions. Because, what is the driving factor for improving the quality of education is the cooperation between principals, teachers, staff and guardians. All elements in the institution are integrated in realizing the school's mission and mission. The principal routinely supervises and coordinates so that teaching and learning activities run effectively
PENGARUH PEMASARAN MEDIA SOSIAL DAN KUALITAS PELAYANAN TERHADAP KEPUTUSAN PEMBELIAN KONSUMEN PADA TOKO TIGER WILD STORE
Authors: Kurniawan Andri , Noor M. Arief , Sutrisno Hadi , Hakim Melati Puspita
Published: November 2024

This study examines the influence of social media marketing and service quality on consumer purchasing decisions at Tiger Wild Store. Against the background of the increasing use of the internet and social media, this study highlights the significant role of social media such as Instagram, Facebook, and others in product promotion. In addition, the quality of service received by consumers also affects purchasing decisions. This study uses a quantitative descriptive method with a population of all Tiger Wild Store consumers and a sample of 50 respondents. Data were collected through questionnaires and analyzed using a Likert scale, validity, and reliability tests. The results showed a significant influence between social media marketing and service quality on consumer purchasing decisions. These findings provide insight for companies to improve marketing and service strategies to increase sales.
WAM 2024 2. International Hybrid Coferance and Exhibition, Advances in Welding and Metal Additive Manufacturing Technologies, Abstract Book
Authors: Koçak Mustafa , Dilibal Savaş
Published: November 2024

This second International Hybrid Conference on the “Advances in Welding and Metal Additive Manufacturing Technologies - WAM” has been organised to establish an international platform for experts to present and discuss the latest developments in welding and metal additive manufacturing (AM) technologies. This conference primarily aims to bring together leading scientists and engineers specializing in the most current topics within the welding and AM/Wire Arc Additive Manufacturing (WAAM) areas. It is widely recognized that a deep understanding of arc welding science and technology forms the foundation of the continually evolving metallic AM/WAAM technologies. Hence WAM 2023 and this WAM 2024 conference were designed to cover both areas to keep the interrelationship of both technologies and experts particularly in the metal AM/WAAM topics. We are pleased to report that this goal has been successfully achieved, and our call were wellresponded by the national and international experts and WAM 2024 is able to present recent views and R&D results of the experts from 21 countries. WAM 2024 Conference is hosting two Keynote Lectures and xx Invited Speakers in the fields of welding and AM / WAAM Technologies covering lightweight and high strength Materials for the application areas from aerospace, defense to major structural engineering applications. Needless to mention that all developments are covering recent studies in the fields of robotic technologies, software developments, arc and solid-state welding technologies with innovative material applications. We, Istanbul Gedik University, with the strong support of the 61 years old Gedik Welding industry, are welcoming all delegates to historical city of Istanbul for the 21-22 November 2024. We sincerely thank all speakers, both in person and online, for their work and effort for the success of the WAM 2024 Conference. Surely, we thank Ms. Hülya Gedik, Gedik Welding and Prof. Dr. Ahmet Kesik Rector of the İstanbul Gedik University, for their immense support to organise this conference. Sincere thanks to conference secretary Dr. Doruk Gürkan and team members Serhat Yakar and Dr. Ali Koruk all advisory board members for their continuous support and tireless efforts.
The Application of Artificial Intelligence for the Design of a Virtual Assistant (Chatbot) as an innovative approach in user service: Social Security Center No.102
Authors: Dominguez Tabera María Elda , Gonzalez Mosqueda Mayra Lorena , Martinez Tapia Karla , Simancas Acevedo Eric , León Olivares Eric , Aviles Coyoli Katia Lorena , Robles Camarillo Daniel
Published: November 2024

The "Social Security Center No.102" has a deficiency in customer service, which has caused problems such as low user satisfaction, bad reputation, long waiting times for answers and loss of customers. The objective of this project is to demonstrate that the design and implementation of a virtual assistant (Chatbot) optimizes the service to users of the organization. As for the design of the method, the research is considered mixed, applied and technological; and depending on the level of research, it is descriptive, explanatory, cross-sectional, non-experimental and field. A stratified population sample of 380 people was considered, to whom a "questionnaire" type data collection instrument was applied, consisting of 4 sections and 24 items.
Based on the results obtained, it was shown that the Chatbot improved efficiency by 64.4% and effectiveness by 63.1% in the provision of customer service to users.
Kinematic analysis applied to a solar tracker driven by a 4-bar mechanism
Authors: Figueroa-Diaz Rafael A. , Martínez-Mireles Josue R. , Urias Francisco G. , Moreno-Romero Rafael , Ruiz-Ibarra Erica C. , De la Cruz-Soto Javier , Rodríguez-Flores Jazmín
Published: November 2024

This paper presents the kinematic analysis of the eccentric crank-slider and crank-rocker mechanisms applied to control the 1-DOF in a solar tracker focused on improving the conversion of solar energy into electrical energy. The mechanisms for its construction and the kinematic equations that allow to know the state that keeps the movement in the working space of the tracker and its comparative analysis between them are presented. Finally, the construction to scale with 3D printing is shown to validate the functionality of each of the 4-bar systems.
Gender wage gap in Hidalgo, post-pandemic scenario COVID-19
Authors: Sandoval-Zamorano Fabiola , Hernández-Veleros Zeus Salvador , Torres-González Miguel Angel
Published: November 2024

Since the beginning of the 21st century, it has been found that men are paid more than women in the same job position, without this depending on their productivity or work skills. The objective of this paper is to analyze the gender wage gap in the state of Hidalgo, after the COVID-19 pandemic, through the statistical indicators provided by INEGI in the National Occupation and Employment Survey (ENOE) during the period from the first quarter of 2021 (2021.01) to the fourth quarter of 2023 (2023.04), using the Oaxaca-Blinder methodology.
TUMEURS BENIGNES DES MAXILLAIRES : ASPECTS EPIDEMIOLOGIQUES, DIAGNOSTIQUES ET THERAPEUTIQUES
Authors: Djemi Ernest Martial
Published: November 2024

SummaryIntroduction: The aim of this study was to describe the epidemiological, diagnostic and therapeutic aspects of benign maxillary tumours. Material and methods: This was a retrospective study carried out from January 2017 to December 2020 in the odontostomatology and maxillofacial surgery department of the Bouaké Hospital. It included all patients presenting with a benign tumour or pseudotumour of the maxillae and whose diagnosis had been made clinically, radiologically and histologically. Results: During the study period, 30 cases of benign maxillary tumours were recorded. The mean age was 27.6 years (8-53 years). The sex ratio was 2.33. Facial swelling was the most common reason for consultation (100%). The average time to consultation was 5.8 years (3-14 years). Maxillofacial CT scans were performed in all patients. The site was mandibular in 23 patients (76.6%) and ameloblastoma was the most common benign tumour (33.3%). All patients received surgical treatment. It was conservative in 13.3% of cases (n=04) and surgical interruption in 86.7% of cases (n=96). The outcome was favourable in 28 patients (93%). Two patients (7%) developed a postoperative infection of the mandibular stent. Conclusion: Benign maxillary tumours represent an important entity in maxillofacial pathology. Ameloblastoma is the most common benign tumour. It is treated surgically with good results. To improve the management of these tumours, patients should be made aware of the need for early consultation and treatment.
PRONOSTIC DES PATIENTS HOSPITALISES POUR COVID-19 AU CENTRE DE TRAITEMENT DES EPIDEMIES (CTE) DE L’HOPITAL REGIONAL DE THIES DU 1ER MAI 2020 AU 15 SEPTEMBRE 2020
Authors: FAYE Fulgence Abdou
Published: November 2024

SummaryIntroduction: Since the beginning of March 2020, Senegal has been confronted with the COVID-19 pandemic, and its first case was recorded on 2 March of the same year. In the Thiès region, studies have focused mainly on the management of confirmed cases of COVID-19, but few have addressed the evolutionary aspect. We therefore took upon us to assess the prognosis of patients after hospitalisation in order to evaluate possible somatic or psychological effects linked to COVID-19.Methodology : This was a prospective study from May 1st to September 15th 2020 (i.e. the first wave of the covid-19 pandemic), descriptive with analytical aims. The population represented confirmed cases of COVID-19 hospitalised at the CTE of the Thiès regional hospital. This was an item-based tele-evaluation approach, and data were collected using a structured survey form and by telephone call, then analysed using SPSS Statistics version 25 software.Results : At the end of data collection, 97 patients were identified according to the established criteria. The majority of patients came from Thiès (40%), followed by Tivaouane (14%, 24.1 km from the CTE) and Pout (12%, 16.1 km from the CTE). The mean age of the patients was 49.63 +/- 17.7 years, ranging from 7 to 79 years, and 55% were male.Twenty-seven percent were asymptomatic. For those who were symptomatic, the most frequent symptoms were fever (37%), headache (34%) and cough (33%), followed by agueusia (22%), asthenia (21%) and difficulty breathing (11%).Anaemia was noted in 16% of patients, leucopenia in 3%, thrombocytosis and thrombocytopenia in 3%.COVID-19 pneumopathy (ground-glass appearance) was noted in 7%.No patient experienced any psychological effects during this study. However, one patient had persistent dyspnoea.In our work, fifty-four percent (54%) of patients were not followed up after their recovery from COVID-19. However, 22% of patients were monitored for hypertension and 16% for diabetes. The majority of patients (91%) were «satisfied», or even «very satisfied» (4%), with their care at the CTE.Conclusion : Patients admitted at the Thiès CTE during the first wave of the COVID pandemic were predominantly male. They were followed up systematically on a case-by-case basis unless they had comorbidities such as hypertension or diabetes. The majority of these patients were very satisfied with their care at the CTE. Overall, the outcome was favourable, but one case of persistent respiratory distress was noted, possibly associated with a «long COVID» Keywords: COVID-19, CTE, effects
LES REACTIONS TRANSFUSIONNELLES : FREQUENCE ET CONDUITE THERAPEUTIQUE A L’HOPITAL REGIONAL DE LABE EN GUINEE.
Authors: Diakité Mamady
Published: November 2024

SummaryIntroduction: The Labé regional hospital is the second largest hospital in Guinea. Our aim was to determine the incidence of transfusion reactions, describe their management and identify the factors associated with their occurrence.Material and methods: This was a cross-sectional descriptive and analytical study conducted over 6 months from 1 November 2019 to 30 April 2020 at Labé regional hospital. We divided transfusion reactions according to WHO grades. We performed a statistical analysis to identify the factors associated with the reactions recorded.Results: Of the 246 patients transfused with whole blood, 14 developed a transfusion reaction, a frequency of 5.7%. For 55.1% of patients, the initial haemoglobin level varied between 5.1 and 8g/dl, and severe malaria was the most frequent indication for transfusion (28.0%). Of the 14 patients who developed a transfusion reaction, 8 (57.1%) were women. Shivering-hyperthermia syndrome was the most common transfusion reaction with 57.1% (n=8). All transfusion reactions were grade 1 and occurred during transfusion (50% within the first 30 minutes). The mean duration was 52.28 minutes. The management measures were based on stopping the transfusion (85.7%), maintaining the venous line (85.7%), administering an anti-inflammatory drug (85.7%) and stopping the transfusion (85.7%), maintenance of the venous line (85.7%), administration of medication and monitoring of vital parameters (100%).The drugs administered were dexamethasone and calcium gluconate (100%), paracetamol (78.6%) and metopimazine (7.1%). Transfusion history was significant, but no deaths were recorded.Conclusion: Transfusion reactions are not negligible at Labé Regional Hospital.Subsequent studies to assess the knowledge of healthcare staff and strengthen their ability to carry out good transfusion practice would help to reduce this frequency and improve the transfusion safety of patients at Labé Regional Hospital. Keywords: Transfusion reactions, Therapeutic attitude, Labé regional hospital, Guinea
Programa multiprofissional de intervenção baseado nos pilares da medicina do estilo de vida em uma empresa de grande porte: um relato de experiência
Authors: Vegian Camila , Colontoni Bruno Albuquerque , Takano Carlos , Filippis Patricia , Lacerda Laurineide Leão , Tales Marcelo Henrique
Published: November 2024

O impacto crescente das Doenças Crônicas Não Transmissíveis (DCNT) na saúde da população ativa exige estratégias inovadoras e preventivas para promover a qualidade de vida no ambiente de trabalho. Este estudo relata a experiência de um programa multiprofissional de intervenção em uma empresa de grande porte, fundamentado nos seis pilares da Medicina do Estilo de Vida.