bluuebunny/crossref_metadata_2025 huggingface dataset:
Enhancing the performance of an open quantum battery by adjusting its velocity
Authors: Mojaveri Bashir , Bahrbeig Rasoul Jafarzadeh , Fasihi Mohammad Ali , Babanzadeh Sanaz
Published: August 2023

The performance of open quantum batteries (QBs) is severely limited by decoherence due to the interaction with the surrounding environment. So, protecting the charging processes against decoherence is of great importance for realizing QBs. In this work we address this issue by developing a charging process of a qubit-based open QB composed of a qubit-battery and a qubit-charger, where each qubit moves inside an independent cavity reservoir. Our results show that, in both the Markovian and non-Markovian dynamics, the charging characteristics, including the charging energy, efficiency and ergotropy, regularly increase with increasing the speed of charger and battery qubits. Interestingly, when the charger and battery move with higher velocities, the initial energy of the charger is completely transferred to the battery in the Markovian dynamics. In this situation, it is possible to extract the total stored energy as work for a long time. Our findings show that open moving-qubit systems are robust and reliable QBs, thus making them a promising candidate for experimental implementations.
Coral Health Thrives in Unprotected Reef Ecosystems in Southeast Nosy Be, Madagascar
Authors: Fuller Jace
Published: August 2023

The coral reefs in Madagascar hold a special importance in the Indian Ocean. The country is among the top 15 in the world for largest coral reef area, and it shelters the greatest diversity of corals and macroinvertebrates in the central and western Indian Ocean. Because of their importance to marine ecosystems, research and protection of these threatened areas is imperative. The objective of this study was to assess the nature of hard coral reef ecology in the southeast region of Nosy Be and to better understand the extent of coral bleaching and disease as it compares to past conditions. The method I used to assess live hard coral cover and coral composition was benthic survey methodology. Across 5 different sites around southeast Nosy Be, the presence of health conditions such as bleaching, diseases, algal assembly, and soft coral colonization was collected, and coral cover and taxonomic composition was collected and calculated. Results show that coral cover and biodiversity have increased in certain sites and that counts of health conditions at every site were low compared to each site’s coral cover and to past results found in 2015. These findings suggest that the overall health of corals around Nosy Be has improved and that the unprotected reefs around Lokobe National Park are likely comparable in coral cover than those protected sites. Accounts say that local communities have stopped disturbing their nearby reefs and have begun supporting and enacting regeneration projects at certain reefs on the island, ending anthropogenic disturbance as a health detriment and aiding the reefs in recovery and survival. More research, attention, and action should be placed on all fragile ecosystems in Madagascar, and the responsibility should be on the Malagasy government to look into establishing the presently studied sites as protected areas to ensure their continued success and survival.
Buying from the Fringe (too)
Authors: Bru Lluís , Cardona Daniel , Sákovics József
Published: August 2023

We analyze how to divide the requirements of a (public) firm into lots, when potential suppliers suffer from heterogeneous diseconomies of scale. The optimal design leads to all firms, included the disadvantaged competitors, the fringe, being active, despite the concomitant cost of increasing supplier profit. Setting large lots that only large firms can produce competitively is necessary; but also setting small lots that the fringe firms can competitively bid for, reduces procurement cost. If, in addition, some medium-sized lots are set aside for the fringe –as allowed by the US regulations, but not by the EU ones– procurement cost is further reduced.
JEL: H57, K23, L23, L51.
CMMSE Applications of the inverse degree index to molecular structures
Authors: Molina Edil D. , Rodriguez Jose M. , Sanchez Jose L. , Sigarreta Jose M.
Published: August 2023

The inverse degree index, also called inverse index, first attracted attention through numerous conjectures generated by the computer programme Graffiti.Since then its relationship with other graph invariants has been studied by several authors. In this paper we obtain new inequalities involving the inverse degree index, and we characterize graphs which are extremal with respect to them. In particular, we obtain several inequalities relating the inverse degree index with the first and second Zagreb indices, the general first and second Zagreb indices, the Forgotten index, the general sum-connectivity index, the Sombor index and the misbalance indeg index, and several parameters of the molecular graph as the number of vertices, the number of edges, the minimum degree and the maximum degree. Also, we compute the inverse degree index for some classes of chemical graphs. Furthermore, some applications are given to the study of the physicochemical properties of three classes of compounds: polyaromatic hydrocarbons, polychlorobiphenyls, and octane isomers.
MSC Classification: 05C09 , 92E10
WRITING AS A MODEL OF CULTURAL SEDIMENTATION AND MEMORY: FERRARIS, DERRIDA AND HUSSERL
Authors:   Vytautas Magnus University, Department of Philosophy, JONKUS DALIUS
Published: August 2023

Despite their creativity, cultural actions are not established out of nothing. They are based on previous actions, their passive or active memory, and extension. Sedimentation is the depositing of sediments that occurs during certain processes. They testify to the processes that have taken place and themselves become significant links or traces. Different layers of sediment are formed, which testify to past events, which have structures in the present. The best-known phenomenological concept of sedimentation was formulated in Husserl’s text The Origin of Geometry. Husserl uses the specific geological term of sedimentation to describe the science of geometry as a linguistically (written) mediated genesis of conceptual knowledge. The human practice of knowledge can be transmitted to other generations only by expressing it linguistically and recording it in writing. Derrida used the phenomenological concept of sedimentation and created Grammatology. The main idea of documentality is that a particular kind of social objects, namely documents (records of social acts) are the ground of social reality. For all three philosophers, writing or recording becomes a model for reflecting on cultural-social reality. The purpose of this article is to discuss the writing as a model for cultural sedimentation and memory. Husserl understood writing as a sedimentation that must be reactivated. However, Derrida and Ferraris identify the written objects only with materialized writing and the repetition of what is written. They do not distinguish between imitative and comprehensive reading.
DERRIDA’S OTHER TRANSCENDENTAL AESTHETIC
Authors:   Centre Gilles Gaston Granger, University Aix-Marseille, Campus Schuman, LOBO CARLOS
Published: August 2023

By going back to the starting point of Derrida’s debates with some of the main representatives of structuralism in France, I propose to highlight the ambiguities that cover the very notion of structure, and to take the measure of the exact role that the reference to phenomenology plays then and will continue to play thereafter. Among these ambiguities: the one that touches the mathematical notion of structure, central in the triumphant structuralist mathematical current in France at that time; and especially: the one called “groups of transformations,” the most important one to understand at the same time the audacities and the impasses of structuralism. The hard core of mathematization of modern physics, with Galileo’s principle of relativity, then developed in a masterly way in Einstein’s theory of relativity rest on this very structure. After tracing the broad outlines of these initial discussions, we engage in an analysis of how it is possible to understand the “epistemological contemporaneity” of relativity theory and Husserl’s transcendental aesthetics. Based on a thorough exploration of the analyses of the intersubjective constitution of space, time and the objective common world, we identify this central structure that Husserl calls “intersubjective group of transformation.” Equipped with this phenomenological structure, we trace this motif in Derrida’s work. Its insistence allows us to understand how the phenomenological premises of his critique of structuralism can help to understand his theoretical positions, especially in contrast to Jean-Luc Nancy.
The role of comparative studies in the formation of Japan’s mixed legal system
Authors:   MGIMO University, Trikoz Elena N. ,   RUDN University
Published: August 2023

The theoretical influence of legal comparative scientists and the practical role of comparative legal studies of foreign law on the process of modernization of traditional Japanese law are determined in this article. The Japanese acceptance of the Western legal model, the reception of the Romano-Germanic doctrine, texts and ideology, learning from European jurists invited to the country and other factors led to the Westernization of management practice and legal regulation of life in Japan. Voluntary “legal acculturation” took place under the direct influence of comparative models of codification and reception of foreign law. The author conventionally identifies five stages of “legal westernization” of the Japanese system of law. At the first stage, French jurisprudence had the greatest dogmatic and partly practical impact on the Japanese, when the legal education of local officials in the Napoleonic spirit began, the first translations of French legal treatises took place, and Parisian lawyers prepared important codification projects. The Japanese then became fascinated with Anglo-American legal culture, driven by an influx of British lawyers who came to the islands to serve the local community of Her Majesty’s subjects, as well as the establishment of the first school of English law in the capital. At the third stage, as the reactionary-militarist policy developed, the emphasis shifted towards the German branch of the European family, and Japanese law was reoriented to the German bourgeois-landlord legislation and the pandect model of codification. At the fourth stage, there was an assimilation of American jurisprudence and US legal realism, and the mutual interest of overseas comparativists in Japanese legal studies increased. In the fifth stage, the comparative approach again became the foundations of a new wave of legal reforms in Japan. Japanese law moved slowly from the family of Confucian-Chinese and traditional Shinto law to the Germanic branch of the Roman law family and then turned into a “gray legal culture”, at the crossroads of Western and East Asian legal cultures.
The element of fault in Roman private law
Authors: Jhering Rudolf
Published: August 2023

R. von Jhering’s 1867 work Das Schuldmoment im römischen Privatrecht, translated hereby into Russian, is still recommended in basic textbooks on German civil law marked “grundlegend”, which means “fundamental”. And indeed, despite the significant complication of the legal material on this issue since its publication, the work contains fundamental ideas from which one can depart in various directions, but which it is absolutely impossible and unacceptable for an educated lawyer to pass by. From a didactic point of view, the work is remarkable in terms of the accessibility of the language, the clarity of ideas and the illustrative nature of the material supporting them. The work of R. von Jhering, despite its relative brevity, is a full-fledged study and, undoubtedly, is one of the outstanding monuments of legal scholarship not only of the 19th century and Germany alone, but of all time for the whole world. It shows the path that the legal system must overcome from the unsophisticated ancient legal forms to an impartial assessment of what causes the greatest irritation in any person — the wrong committed against him. What is fundamentally important in the work is not that R. von Jhering explained what was already known, but how this work can help not to lose such important ethical values as the principle of guilt, proportionality of punishment, individual assessment of behavior on the further path of development. And much more. It seems that many readers, after reading the work, realize that their ideas about civil liability are much closer to Ihering’s description of ancient law, since the guilt component often goes far into the background compared to the idea that the injured person should be restored in property terms.
Comparative analysis of the influence of temperature and precipitation on drought assessment in the Marmara region of Turkey: an examination of SPI and SPEI indices
Authors: Soydan Oksal Nazire Goksu
Published: August 2023

Drought is one of the most serious problems for human societies and ecosystems. Climate change has begun to affect the whole world, but regional climate change can have different effects. Precipitation is frequently used to determine drought; besides, temperature has started to be used in recent years. The effect of temperature on the occurrence of drought was investigated for the Marmara region, located in the northeast of Turkey. The spatiotemporal variability of drought in the Marmara region was analyzed by using the standardized precipitation index (SPI) and standardized precipitation evapotranspiration index (SPEI) for 3-, 6-, and 12-month series. Results show that SPEI droughts occur with longer duration and increased magnitude, which can be attributed to the rise in potential evapotranspiration rates with an increase in temperature. The correlation between SPI and SPEI is strong for the same time series, and the number of extreme drought values for SPI is higher than SPEI, while the number of severe and moderate drought values is lower compared to SPEI. The years 1989, 1990, 2001, 2007, and 2014 were characterized as the highest drought years throughout the region. The study concludes that temperature should be considered in future studies.
Programa Institucional de Bolsas de Iniciação à Docência (PIBID) no contexto da Covid-19
Authors: Mello Ângela Rita Christofolo de , Taborda Cleuza Regina Balan
Published: August 2023

O texto publiciza resultados de um projeto de pesquisa-ação aprovado pela Universidade do Estado de Mato Grosso com o objetivo de identificar, estudar e analisar os problemas de aprendizagem dos estudantes matriculados nos Anos Iniciais do Ensino Fundamental nas escolas da rede pública de Juara/MT, que aderiram ao Programa Institucional de Bolsas de Iniciação à Docência (ID) (CAPES/02/2020), bem como propiciar aos bolsistas de Iniciação à Docência aprofundamento teórico e prático. De abordagem qualitativa, com viés na pesquisa-ação, dentre os procedimentos metodológicos incluíram-se atividades realizadas por 32 bolsistas de ID, 4 supervisoras e 2 coordenadoras de área, além de elaborações de planejamentos, recursos didáticos, relatórios mensais e participações em aulas remotas com estudantes dos Anos Iniciais da Educação Básica e em encontros formativos mensais. Os perfis envolvidos compreenderam a multidimensionalidade da docência, e a importância de a formação inicial de professores acontecer alicerçada nos enfrentamentos reais da escola.
One-pot Synthesis of Chemical Delivery Systems for Gamma-aminobutyric Acid and its Analogues
Authors: Semyonkin Aleksey , Zavadovskiy Roman , Polivanova Anna , Abbasova Kenul , Shipulo Elena
Published: August 2023

Introduction:

A one-pot synthesis route was proposed for the synthesis of chemical delivery systems of bifunctional compounds containing carboxylic- and amino groups, such as gamma-aminobutyric acid and its structural analogues, gabapentin and phenibut.

Methods:

To obtain targeted compounds, consecutive esterification, amidation, methylation, and reduction were employed in contrast to a more traditional approach that requires isolation and purification of semi-products after each reaction step.

Results:

A significant (nearly two-fold) increase in yields was observed when target compounds were synthesized using a one-pot approach compared to the conventional one.

Conclusion:

One-pot approach is a possible and beneficial way for the synthesis of chemical delivery systems for gabapentinoids and other drugs containing carboxylic and amino groups.
Influence of Spring Stiffness on the Loading Speed of the Falling Weight Deflectometer (FWD) in Bearing Capacity Evaluation of Cement Concrete Pavement
Authors: Nguyen Van Hieu , Thuy Van , Pham Cao Thang , Tran Nam Hung
Published: August 2023

Introduction:

The bearing capacity evaluation of cement concrete runway pavement is one of the most important contents in the airfield operation. Among the methods for estimating bearing capacity, the Falling Weight Deflectometer (FWD) is the most widely used method because it does not damage the pavement structure and spends so much time. The equipment for evaluation should have suitable parameters, such as. magnitude and loading speed, to the actual operating loads.

Aims and Objectives:

Currently, the equipment to assess the bearing capacity of cement concrete pavements of highways and airports by falling weight has been widely used in the world and is being applied in Vietnam. The loading system consists of a falling block through a spring system acting on the pressure plate under the pavement with a certain falling height. In particular, the spring system plays an important role in controlling the speed of the load on the pavement. In Vietnam, the test standards (Industry Standard 22TCN335-06, Vietnamese Standard TCVN 11365-2016) for assessing the pavement bearing capacity by FWD equipment do not specify the selection of spring stiffness corresponding to different operating speeds of the vehicle. Therefore, it is difficult to use the equipment for pavements with operating speeds different from the standard.

In this paper, we study the effect of spring stiffness on the loading speed when considering different loading speeds corresponding to different speeds of vehicles moving in reality. This research is only limited to laboratory experiments. This study aims to determine the dependence of the loading magnitude and loading time on the damping spring stiffness of the dynamic loading equipment, that is, used as a basis for choosing the appropriate damping stiffness of FWD corresponding to actual vehicles.

Methods:

Among the methods for estimating the bearing capacity, the Falling Weight Deflectometer (FWD) is the most widely used method as it does not cause any damage to the pavement structure and spends much time. The equipment for evaluation should have suitable parameters, such as magnitude and loading speed, to the actual operating loads.

Results:

This paper presents the results of experimental research that determines the influence of the damping spring stiffness on the loading speed of the dynamic loading equipment on the model of the concrete slab in the laboratory.

Conclusion:

Based on the comparison of the FWD loading speed when using 02 damping springs with different stiffness, we propose the basis for choosing the damping system that conforms to the evaluation needs of different types of vehicles.
Evaluating Health-promoting Lifestyle Profile among Menopausal Women: A Meta-analysis
Authors: Moshfeghy Zeinab , Riazi Hedyeh , Hajian Sepideh , Montazeri Ali
Published: August 2023

Background:

Menopause is one of the most drastic experiences in a woman's life because of a spectrum of vasomotor symptoms which affect the quality of life and lifestyle. Although many treatments for these symptoms are available, they can be used for only a short duration. The nonpharmacologic therapies associated with healthy lifestyle behaviors are increasing. Health-Promoting Lifestyle Profile- II (HPLP-II), a self-report questionnaire designed to assess an individual's engagement in health-promoting behaviors, has focused on six dimensions of behavioral health promotion. This study aimed to review the degree of lifestyle modification in menopausal women based on the questionnaire HPLP-II.

Methods:

A comprehensive search was conducted for articles using HPLP-II after literature as the identified instrument for menopausal women's lifestyle, followed by a meta-analysis.

Results:

Among 8525 unique titles, 13 studies with 2648 participants were included. Quality assessment was “good” for most of them. The summary effect of participant age was 55.78 years and 49.1 years for menopausal age. Analysis of the pooled studies yielded a mean HPLP total score of 127.69. There was no evidence of publication bias.

Conclusion:

Our meta-analysis showed a moderately rated health-promoting behavioral profile in menopausal women. The spiritual growth subscale received the highest score, whereas physical activity received the lowest score and was at the lower limit of the moderate range. Health policymakers, patients, and healthcare providers can use these results to improve the healthy lifestyles of menopausal women.
Impact of Coping Skills and Mental Health in Burnout among Healthcare Professionals during Pandemic COVID-19
Authors: Hyseni Blerte , Hajrullahu Vjosa , Kryeziu Blerta , Prekazi Lulejete , Taganoviq Besarta , Shabani Bujar , Gallopeni Florim
Published: August 2023

Introduction:

Healthcare professionals face numerous challenges, such as increased risk of exposure to the SARS Cov-2 and infected patients, heavy workloads, and ethical dilemmas in their daily practice, compounded by a constantly evolving clinical environment. Moreover, the COVID-19 pandemic has exacerbated burnout rates among healthcare professionals due to prolonged working hours and other stressors such as environmental, physiological, and psychological.

Methods:

This study was designed as a cross-sectional and correlational investigation and included 691 healthcare providers, including physicians and nurses working in public healthcare institutions in Kosovo. The questionnaire comprised four sections: Socio-demographic, General Health Questionnaire-28 (GHQ-28), COPE Questionnaire, and Maslach Burnout Inventory (MBI).

Results:

The results indicated that healthcare professionals experienced emotional fatigue and depersonalization at average to high levels of 38.7%, respectively 87.0%, specifically, during the pandemic. While 88.0% of healthcare professionals reported experiencing personal success. Furthermore, 50.2% of healthcare professionals had Clinical Somatic Symptoms, 44.4% had Clinical Symptoms of Anxiety and Insomnia, 28.8% had Clinical Social Dysfunction, 34.5% had Clinical Symptoms of Depression, and 43.3% displayed Clinical Symptoms/Distress of GHQ-28 scores. The burnout scales, Emotional fatigue, and Depersonalization were positively and significantly correlated with all General Health Questionnaire scales.

Conclusion:

The study's findings highlight the critical importance of developing and implementing psychological interventions for healthcare professionals who are struggling with mental health issues and experiencing high levels of burnout. These interventions could be conducted individually or in groups and should be prioritized to support healthcare professionals' recovery. As the pandemic continues to impact healthcare professionals, it is crucial to enhance coping strategies within the workplace to maintain their well-being and potentially mitigate burnout rates for future pandemics. Thus, there is an urgent need to address the mental health challenges faced by healthcare professionals, and proactive measures should be taken to provide them with the necessary support and resources to cope effectively during these trying times.
Gerenciamento de equipes mecânicas na construção de aterro rodoviário: um estudo na rodovia BR 381/MG – Norte
Authors: Delmiro F. , Possato J. , Ferraz-Almeida R.
Published: August 2023

O transporte rodoviário responde pela maior parte dos serviços de transporte de cargas no Brasil. Esse modal também é o que mais recebe investimentos do governo federal em projetos, obras de manutenção, implantação e aumento de capacidade. Com a hipótese de que a hipótese que o gerenciamento de custo e tempo de serviços e equipamentos são ferramentas fundamentais para a construção de aterro em rodovia. O objetivo do estudo foi gerenciar o custo e tempo de equipes mecânicas de serviços e equipamentos para o espalhamento em camadas, homogeneização, conveniente umedecimento ou aeração e compactação dos materiais para a construção de um aterro na rodovia BR 381/MG – Norte. Um estudo foi realizado usando a base de dados do Manual de Custos Rodoviários do Departamento Nacional de Infraestrutura de Transportes e o Sistema de Custos Rodoviários, comparando cronograma e custo de duas equipes mecânicas: Equipe 1, grade de discos - GD; niveladora - MO; rolo compactador - RC; tanque caminhão - CT; trator agrícola - TA) e uma equipe alternativa (GD; RC; CT; TA e trator de esteira - TE). Os resultados mostram que o custo da equipe alternativa é 26% superior ao da equipe mecânica proposta da Equipe 1, mas sua produção horária foi 33% maior, situação que refletiu diretamente em um prazo menor, passando de 222 dias iniciais para 169, economia de 5% no custo final com a utilização de uma equipe alternativa. Concluindo que o conhecimento da área de gerenciamento de cronograma e as metodologias da atividade principal, baixas e aumento da eficiência na execução de um projeto são de grande valia na elaboração de soluções.
Comissionamento de sistemas prediais: aplicação em uma instalação hidrossanitária de uma cozinha e área de serviço
Authors: Ferreira A. , Reis R. P. A. , Ferreira A. T.
Published: August 2023

A medida que novas tecnologias e métodos construtivos avançam na construção civil, também surgem grandes desafios. A utilização de sofisticados sistemas de controle contribui para facilitar o gerenciamento do bom desempenho dos sistemas construtivos, equilibrando demanda de insumos básicos e manutenção da viabilidade técnica e econômica dos empreendimentos. Dentre esses insumos empregados nos sistemas construtivos, pode-se destacar os componentes das instalações hidráulicas-sanitárias prediais, que normalmente registram grande parte das solicitações de assistências técnicas no pós-obra. As falhas na concepção dos edifícios podem ter início na má interpretação, por parte da equipe técnica, dos requisitos dos proprietários. A fim de se evitar falhas, retrabalhos e prejuízos, o comissionamento de sistemas prediais surge como alternativa para registro e definições de estratégias de melhorias contínuas de planejamento, concepção e execução. Diante disso, o objetivo deste trabalho é avaliar a aplicação do processo de comissionamento de sistemas prediais, tomando como estudo de caso: uma cozinha e uma área de serviço de uma edificação residencial. Os resultados obtidos contribuem para um melhor entendimento dos protocolos de estabelecimento de ações de comissionamento em instalações hidráulicas prediais, visando aumentar a qualidade de futuros empreendimentos.
A Qualidade na Gestão de Projetos de Construção e Montagem
Authors: Mattos M. H. M.
Published: August 2023

O segmento de construção e montagem industrial exerce um importante papel na política de desenvolvimento nacional. Criando as condições necessárias para viabilizar a implantação deste tipo de política, o segmento em referência enfrenta diversas dificuldades decorrentes de adversidades impostas pela grande variabilidade de seus projetos, dos ambientes onde os mesmos são executados, e de seus processos executivos. A gestão da qualidade e o gerenciamento de projeto, são as disciplinas que podem assumir a responsabilidade de nortear as empresas pela busca de processos produtivos, que priorizem a produtividade e a qualidade, possibilitando assim oportunidades de melhoria e ganhos de posicionamento em um mercado que se mostra cada vez mais competitivo.
Pengaruh Parameter Pemakanan Terhadap Kekasaran Permukaan ST 40 pada Mesin Bubut CNC
Authors: Fauzi Ahmad , Sumbodo Wirawan
Published: August 2023

Material ST 40 yang digunakan dalam pembuatan poros roda mobil listrik, harus memiliki kekasaran permukaan yang baik. Karena poros nantinya akan dirangkai pada komponen lain yaitu bearing. Tujuan penelitian ini yaitu untuk mengetahui dan menganalisis pengaruh kecepatan potong, kecepatan asutan, dan kedalaman pemakanan terhadap kekasaran permukaan dengan menggunakan mesin bubut CNC. Metode penelitian ini menggunakan metode eksperimen. Variasi kecepatan potong yang diteliti yaitu 90, 120, 150 m/menit. Kecepatan asutan 0,15; 0,2; 0,25 mm/rev. kedalaman pemakanan 0,25; 0,5; 0,75 mm. penelitian ini menggunakan bahan ST 40, pahat CNMG 120408-MA, dan mesin bubut CNC Fanuc Oit Leadwell. Nilai rata-rata kekasaran permukaan paling baik diperoleh pada interaksi variabel kecepatan potong 150 m/menit, kecepatan asutan 0,15 mm/rev dan kedalaman pemakanan 0,25 mm sebesar 1,034 μm. Dan kekasaran permukaan paling kasar diperoleh pada interaksi variabel kecepatan potong 90 m/menit, kecepatan asutan 0,25 mm/rev, dan kedalaman pemakanan 0,75 mm sebesar 10,594 μm.An electric car wheel axle using ST 40 materials must have good surface roughness due to its contact with bearings. This study aims to identify and analyze the effect of cutting speed, feed rate, and depth of cut on the surface roughness of the axle machined using a CNC lathe. The research employs an experimental method. The varied machining parameters are cutting speeds (90, 120, 150 meters per minute), feed rate (0.15, 0.2, 0.25 mm/rev) and depth of cut (0.25, 0.5, 0.75 mm). This study uses ST 40 material, CNMG 120408-ma cutting tool, and CNC Fanuc OiT lathe. The best result of average surface roughness value is 1,034 μm (lower is better), obtained at a variable interaction of 150 m/min cutting speed, feed rate of 0.15 mm/rev, and depth of cut 0.25 mm.
Analisis Sifat Mekanik Pada Serat Bulu Ayam Dengan Campuran Pp Sebagai Material Komposit
Authors: Rifaldy Rikky , Nugraha Iwan , Suci Faradina Choria , Setiawan Reza
Published: August 2023

Meningkatnya konsumsi ayam tidak disertai dengan pengolahan dan pemanfaatan limbahnya di mana limbah bulu ayam hanya dibuang secara percuma. Serat bulu ayam atau chiken feather fiber ini sangat berpotensi menjadi material komposit yang tentunya harus di treatmen khusus untuk menonjolkan sifat yang menguntungkan serta mereduksi sifat yang merugikan. Penelitian ini dimulai dari observasi permasalahan pada limbah bulu ayam di sekitar Kabupaten Karawang, Tujuan dari penelitian ini yaitu untuk melakukan pengamatan sifat thermal dan sifat mekanis dari material limbah bulu ayam yang dijadikan bahan komposit, untuk melakukan pengamatan dari pencampuran dua polimer dengan berbeda sifat dan karakteristiknya. Selanjutnya mengumpulkan studi literatur yang digunakan untuk mengumpulkan data yang dibutuhkan. Data yang diperoleh diolah sesuai dengan teori berdasarkan studi literatur yang didapatkan, dianalisa serta dilihat keterkaitan permasalahannya dengan tujuan penelitian, dan selanjutnya disimpulkan. Pada penelitian ini pengujian tarik dilakukan untuk mengetahui kekuatan komposit dengan penguatan natural fiber (serat bulu ayam) dengan matrik PP (polypropilen). Dengan melakukan pengujian tarik dapat diketahui tegangan maksimum, regangan dan modulus elastisitas pada spesimen yang diuji. Spesimen yang diuji ini memiliki bentuk dan ukuran sesuai dengan standar ASTM D 638-03 dengan variasi sampel dengan persentase spesimen A : 30% fiber : 70% PP , spesimen B : 50% fiber : 50% PP ,  spesimen C :70% fiber : 30% PP. Hasil pengujian menunjukkan spesimen A : 12.724 kg/f , Spesimen B : 4.1458 kg/f, spesimen C: 3.9214 kg/f.
Rancang Bangun Mesin Pengurai Sabut Kelapa Menjadi Cocopeat Dan Cocofiber
Authors: Gafur Abdul , Muklis Andrian
Published: August 2023

Kabupaten Bengkalis kaya akan kelapa dan produk turunannya dengan produksi rata-rata mencapai 1,7 ton per hari per desa. Meskipun produktivitasnya tinggi, produk turunannya, seperti sabut kelapa, belum dimanfaatkan secara maksimal. Sabut kelapa memiliki banyak manfaat jika diolah menjadi cocopeat dan cocofiber. Cocopeat dapat digunakan sebagai media tanam dan cocofiber umumnya digunakan sebagai pengganti busa di jok mobil. Karya ilmiah ini akan mempresentasikan rancang bangun mesin pengurai sabut kelapa yang menghasilkan cocopeat dan cocofiber. Metode yang digunakan dalam penelitian ini adalah eksperimental, dimulai dari studi literatur, desain dan perhitungan, gambar detail, pembuatan mesin, dan uji unjuk kerja. Hasil penelitian menunjukkan bahwa mesin bertenaga bensin 5 HP dapat mengolah 33 kg sabut kelapa kering per jam, menghasilkan hampir 14 kg cocopeat dan 17 kg cocofiber. Analisis data eksperimen menunjukkan bahwa mesin yang dibangun telah sesuai dengan spesifikasi yang telah dihitung dan kapasitas produksi.
Rancangan Bangun Pemisah Biji Kopi dengan Sistem Cyclone
Authors: Halen Andrean Van , Prakosa Oscar Pambudi , Kurniawan Perwita , Hutama Adhi Setya
Published: August 2023

Pengujian dan analisa pada mesin destoner kopi dilakukan secara langsung dengan menganalisa efisiensi permesinan, laju aliran udara, dan kapasitas mesin destoner dengan hasil terbaik. Mesin destoner kopi menggunakan sistem cyclone untuk menyaring biji kopi terhadap bahan asing. Perhitungan yang digunakan untuk merancang cyclone adalah dimensi standar dari versi swift-umum. Pemilihan versi swift-umum didasarkan pada diameter partikel biji kopi antara 9 dan 15 mm. Setelah mendapatkan perhitungan yang sesuai maka dilakukan proses perancangan mesin destoner kopi bersistem cyclone dengan menggunakan perangkat lunak solidworks. Desain diwujudkan dalam sebuah purwarupa mesin. Berdasarkan hasil penelitian dan pengujian, kecepatan aliran udara untuk dapat mengangkat biji kopi adalah 19,5 m/s. Pada pengujian dan analisa efisiensi mesin penghancur kopi didapatkan efisiensi untuk jenis biji kopi robusta dengan nilai efisiensi sebesar 86,6%. Efisiensi ini cukup baik karena pendataan dilakukan dari kondisi kopi murni hingga kondisi kopi dengan pengotor mencapai 100 persen. Mesin destoner kopi yang dibuat mampu menyaring kopi dengan kapasitas maksimal 12 kg/jam.
Evaluasi Pembelajaran Daring dengan Aplikasi Googlemeet pada Pelajaran Gambar Teknik Mesin di SMK N 1 Rembang
Authors: Minako Dodo Kukuh , Rahdiyanta Dwi
Published: August 2023

Penelitian evaluasi ini bertujuan untuk mengetahui hasil uji coba pelaksanaan pembelajaran daring melalui aplikasi google meet pada pelajaran gambar teknik mesin kelas X TPA. Metode penelitian termasuk penelitian deskriptif kuantitatif dengan model evaluasi CIPP. Metode pengambilan data yang digunakan adalah observasi, wawancara, dan angket/kuesioner online. Hasil penelitian menunjukkan bahwa respon peserta didik kelas X TPA terkait aplikasi google meet sangat menerima dengan rerata 81,19% atau kategori tinggi. Evaluasi pelaksanaan pembelajaran daring melalui aplikasi google meet oleh pendidik mendapatkan persentase 82,2% atau kategori tinggi. Evaluasi pelaksanaan pembelajaran daring melalui aplikasi google meet oleh peserta didik mendapatkan 82,01% atau kategori tinggi. Kelas X TPA mendapatkan nilai rata-rata yang tinggi dibandingkan kelas lainnya sebesar 80,24. Pembelajaran daring melalui aplikasi google meet mendapatkan pengaruh yang baik, sehingga pembelajaran daring semester depan tahun ajaran 2021/2022 untuk semua kelas X pelajaran gambar teknik mesin dapat menggunakan aplikasi google meet.
Peran lingkungan berbahasa dalam membentuk personal branding guru bahasa arab
Authors: A'yuni Qurrotul , Yuslizar Firsa Afra , Wanti Adella Ira , Hilmi Danial , Arief Gesbi Rizqan Rahman
Published: August 2023

Penelitian ini bertujuan untuk mendeskripsikan bagaimana peran lingkungan berbahasa di LPBA Nurul Jadid dalam membentuk personal branding guru bahasa Arab dan mendeskripsikan pola personal branding guru di lembaga tersebut. Dengan menjadikan guru-guru bahasa Arab di LPBA Nurul Jadid sebagai partisipan, penelitian ini menggunakan metode kualitatif jenis studi lapangan. Data yang terkumpulkan dari observasi dan wawancara dianalisis menggunakan reduksi data, penyajian data, restatement, dan penarikan kesimpulan. Hasil penelitian menunjukkan bahwa: 1) Lingkungan berbahasa tidak hanya berperan dalam keterampilan berbahasa namun juga membentuk personal branding guru bahasa Arab; 2) kegiatan bahasa dan siswa merupakan unsur terpenting dalam lingkungan berbahasa yang membantu terbentuknya personal branding guru bahasa Arab; 3) dan pola guru mem-branding dirinya dengan cara memahami peran, menjalankan tanggung jawab, mengembangkan keterampilan, serta mengevaluasi diri.
Kinerja guru sekolah dasar pada masa pandemi covid-19 berdasarkan perspektif motivasi, lingkungan kerja dan komunikasi pemimpin
Authors: Luturkey Gloria , Yugopuspito Pujianto
Published: August 2023

Pandemi Covid-19 membuat proses belajar mengajar harus dilakukan secara daring, sehingga dapat menimbulkan berbagai kendala yang mempengaruhi kinerja guru. Tiga faktor yang paling berpengaruh pada kinerja guru pada masa pandemi yaitu motivasi kerja, lingkungan kerja dan komunikasi pemimpin. Tujuan penelitian ini untuk memetakan hubungan ketiga faktor tersebut terhadap kinerja guru. Penelitian ini menggunakan metode analisis jalur untuk melukiskan dan menguji model hubungan antar variabel. Instrumen penelitian yang digunakan adalah kuesioner dengan teknik pengambilan sampel yang didistribusikan kepada 174 guru pada 12 Sekolah Dasar di Tangerang. Analisis data dilakukan menggunakan uji validitas momen produk Pearson, uji reliabilitas menggunakan Cronbach’s Alpha, uji normalitas data, uji regresi Teknik ANOVA untuk mengetahui pengaruh antar variabel, dan uji R-square untuk mengetahui pengaruh variabel independen dan dependen. Berdasarkan analisis data, dapat disimpulkan bahwa lingkungan kerja dan komunikasi pemimpin berpengaruh positif terhadap motivasi guru, dan lingkungan kerja, motivasi guru, dan komunikasi pemimpin berpengaruh positif terhadap kinerja guru.
Pelaksanaan observasi supervisi klinis pada masa pandemi covid-19 di sekolah menengah pertama
Authors: Yuliana Lia , Ernawati Rini Dwi
Published: August 2023

Untuk menjaga kualitas proses pendidikan, khususnya pada masa pandemi yang beralih ke pembelajaran daring, supervisi klinis perlu dilakukan oleh kepala sekolah. Penelitian ini akan mendeskripsikan serta menganalisis implementasi observasi kelas/pembelajaran dalam konteks supervisi klinis saat masa pandemi. Penelitian ini menggunakan metode kualitatif dengan pendekatan deskriptif yang berfokus di SMP Negeri 1 Bantul. Informan pada penelitian ini terdiri atas kepala sekolah dan guru. Pengumpulan data pada penelitian dilakukan dengan cara observasi lapangan, wawancara kepada informan serta studi dokumentasi. Teknik keabsahan data pada penelitian dilakukan dengan triangulasi teknik dan sumber. Sedangkan, teknik analisis data yang dilakukan melalui pengumpulan data, penyajian data dan penarikan kesimpulan. Temuan penelitian ini menunjukkan bahwa pelaksanaan observasi supervisi klinis pada masa pandemi di SMP Negeri 1 Bantul menggunakan dua metode, yaitu secara langsung dan daring. Aspek yang diamati dalam observasi pembelajaran mengacu pada instrumen yang telah dibuat sesuai permasalahan yang dihadapi guru. Hasil observasi ini berguna untuk perbaikan pembelajaran.
Pengukuran kepuasan layanan pendidikan menggunakan pendekatan HEISQUAL dalam meningkatkan kualitas layanan pendidikan tinggi
Authors: Asnawi Abd. Rohim , Supriyanto Achmad
Published: August 2023

Pengukuran pelayanan di Perguruan Tinggi memerlukan indikator khusus, sedangkan indikator yang ada belum menggambarkan kualitas pelayanan secara spesifik di Perguruan Tinggi. Maka dari itu telah dikembangkan HEISQUAL yang dirancang khusus untuk mengukur SQ dalam lembaga pendidikan tinggi. Instrumen HEISQUAL terbagi menjadi tujuh tema SQ, yaitu profil guru, kurikulum, infrastruktur dan fasilitas, manajemen dan staf pendukung, kualitas pekerjaan, keselamatan dan keamanan, dan siswa. pengembangan keterampilan. Tujuan penelitian ini untuk mengukur kualitas layanan di program studi Manajemen Pendidikan Universitas Negeri Malang serta mengidentifikasi faktor-faktor yang membentuk kualitas pelayanan yang baik di program studi Manajemen Pendidikan Universitas Negeri Malang. Metode penelitian menggunakan pendekatan kuantitatif. Pengumpulan data menggunakan survey terhadap mahasiswa program studi Manajemen Pendidikan Universitas Negeri Malang. Nilai kepuasan mahasiswa pada Program Studi Manajemen Pendidikan, Fakultas Ilmu Pendidikan Universitas Negeri Malang kategori baik yaitu dengan nilai 79,01. Nilai per faktor HEISQUAL mempunyai skor yang cukup tinggi. Enam faktor mempunyai nilai Baik dan satu indikator yaitu kualitas ketenagakerjaan mempunyai nilai kurang baik dan tidak ada indikator yang mempunyai nilai sangat baik.
Tacit knowledge sharing to improve teachers’ performance
Authors: Triana Triana , Rugaiyah Rugaiyah
Published: August 2023

In the current industrial revolution 4.0 era, teachers are required to constantly develop themselves and improve their performance. This is because teachers are the frontliners who directly interact with students. Teachers are one of the spearheads in educational institutions that determine student success. Teachers who are of superior quality will certainly give their best performance. Therefore, this study aims to analyze how teachers are able to exploit the knowledge and skills that exist in themselves by optimizing all sources of knowledge around them through knowledge sharing activities among teachers, particularly tacit knowledge sharing so that they can improve their performance.  The methodology used in this research is a systematic approach with the Systematic Literature Review method with the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-analysis) model from articles published from 2012 to 2022. Based on the results of these studies, it is learnt that knowledge sharing activities among teachers will encourage individual knowledge improvement and produce new knowledge as a process of exchanging knowledge both implied and explicit from each individual.
The management concept of exploring education cost sources through the role of religious leaders
Authors: Adnan Kgs. M. Roihan , Parinduri Rifdah Hasan , Karnia Karnia , Pahruzi Riskang Aj
Published: August 2023

Funding for education in schools often becomes a problem in the world of education. Because of the rapid development of the times, educational needs continue to increase, especially in efforts to improve the quality of education in schools. The purpose of this study is to describe how to manage the extraction of sources of education costs through the role of religious leaders. The method used is a literature review (literature review), namely by reviewing journals or news articles related to research. The analysis model is done by reducing data, presenting data, and drawing conclusions/verifying data. The results show that the management concept of exploring sources of educational costs through the role of religious leaders, which focuses on the community charity movement program, has several stages, namely: 1) Planning, starting from coordination meetings, job desc distribution, compiling work programs, implementation, monitoring, and evaluation; 2) Organizing, the division of tasks includes media managers, financial managers, public relations (PR), as well as field coordinators; 3) Implementation, namely building relationships with religious leaders,  religious leaders preach to places of worship or in community activities such as house celebrations, thanksgiving, and others, media managers remind once a month to give alms, financial managers record income money and carry out financial accountability; 4) Supervision, which is carried out directly by the school principal or a person assigned by the school principal; 5) Evaluation, which is carried out directly or indirectly.
Implementation of school based management in christian religion high school Kupang
Authors: Tanaem Yusuf Elpontus
Published: August 2023

This study aims to analyze the implementation of school-based management in the Christian Religion High School (CRHS) Kupang. The method used in this research is a qualitative method with a descriptive approach. The subjects in this study amounted to 3 (three) people consisting of the principal, vice principal and school committee. Data collection techniques used are interviews and documentation. The data analysis technique used is Analysis Interactive which is divided into four parts, namely data collection, data condensation, data presentation and conclusion. The results of the study show that the implementation of school-based management at CRHS Kupang has been carried out in almost all areas of school-based management which are the indicators in this study. CRHS Kupang has carried out school program planning, implemented the learning process, conducted curriculum management, managed personnel, managed facilities, implemented financial management, implemented student services, built good relations with the community, and carried out a good evaluation of school programs. CRHS Kupang still needs to pay attention to managing the school climate.
Bibliometric analysis of school improvement research: A century of scholarly contributions
Authors: Arjanto Paul , Bafadal Ibrahim , Atmoko Adi , Sunandar Asep
Published: August 2023

This study aims to comprehensively review the historical development and current status of research in the field of school improvement using a bibliometric analysis approach. Recognizing the vital role of schools in society and the necessity for their constant evolution, it is essential to understand the breadth and depth of scholarly efforts in school improvement. Using the Scopus index, 596 English language journal articles on school improvement published between 1916 and 2023 were identified and analyzed. Utilizing the VOSviewer software, the bibliometric analysis was conducted in two stages: descriptive statistics to understand the trend of document volumes and co-authorship countries, and a multidimensional scaling technique to visualize co-authorship, co-occurrence, and citation networks. The data revealed a consistent rise in publication volume over the years, with a peak in 2020. Despite contributions from 45 countries, the United States and the United Kingdom were the most prolific. However, author collaboration was found to be minimal, suggesting potential for broader partnerships. The study also identified key research themes such as leadership, distributed leadership, and accountability through keyword co-occurrence analysis. The most frequently cited literature emphasized the role of collaboration, instructional program coherence, and school culture in school improvement. The findings underscore the necessity for increased global collaboration, exploration of emerging themes, and enhanced geographical representation in future research to further enrich the knowledge base in this vital educational field.