bluuebunny/crossref_metadata_2025_split huggingface dataset:
Selection of generating equipment for a solar-diesel complex
Authors: Vaskov A. G. 
Published: January 2025

A methodology for selecting the composition of generating equipment included in a solar-diesel complex to optimize its operating mode by minimizing the specific fuel consumption of diesel generator units is described. Software developed according to the principle of real-time integer nonlinear programming is used to calculate the minimum operating costs during the operation of the complex. Various restrictions on the operating modes of electrical equipment were taken into account. For a diesel power plant having a minimum capacity not less than 30% of the nominal capacity, the distribution of capacity between diesel generator units takes into account individual consumption characteristics. For an electrical energy storage system whose permissible change in capacity varies from 50 to 100%, the charge/discharge rate is limited to “1C”. For the solar power plant, the change in inverter efficiency was taken into account depending on its load as predicted for a 24-hour period. The research used a model to simulate full-scale equipment of a solar-diesel complex comprising two diesel generator units of 12 and 30 kW, a solar power plant simulator having a capacity of 6.6 kW, an energy storage system, and an active load simulator with a capacity of up to 50 kW. An algorithmic description of the operational principles of an automated control system for ensuring the energy efficiency of solar-diesel complexes in operation is provided. The developed SCADA system is suitable for modeling the operating modes of a solar-diesel complex under conditions close to actual. Depending on the operating conditions of the solar-diesel complex and the equipment parameters (the number of diesel generator units and their nominal capacities, the capacity and power of the electrical energy storage system, as well as the installed capacity of the grid solar power plant), operating mode modeling accuracy can be increased by as much as 30%. Thus, the obtained results of modeling the operating mode of a solar-diesel complex demonstrate the possibility of significantly refining the estimates of the operating parameters of such energy facilities by taking into account the actual energy characteristics of diesel generator units.
Ecologically sound use of sulfur-containing coal resources of the Irkutsk basin as a factor in the evolution of the regional thermal power industry
Authors: Rogov V. Yu. 
Published: January 2025

The article aims to identify possible directions for developing heat technology systems in Irkutsk Oblast, taking into account the integration of resources of the Irkutsk coal basin with high sulfur content. The study applied a systems analysis of trends in the development of high-capacity coal-fired power boilers, considering the possibility of reducing harmful emissions (NOx, CO, SOx) primarily through rational design solutions and the use of coal-water slurry. It is shown that swirl processes realized in fuel combustion schemes that are applied at the TPPs of the Irkutsk power system help to improve the ecological and economic efficiency of heat technology systems, primarily by reducing the combustion temperature and increasing the residence time in the furnace. Experience is available in applying the low-temperature swirl combustion scheme at Ust-Ilimskaya TPP (boiler 6) and a circular furnace at Novo-Irkutskaya TPP (boiler No. 8). It is proposed to redesign the existing power boilers according to the scheme of low-temperature swirl combustion (i.e., the maximum temperature in the furnace is no higher than 1000–1100℃), with the subsequent use of partially demineralized and desulphurized coal-water slurry obtained at the place of extraction and transported by slurry pipeline. Fuel can be burned in a two-stage furnace: it is ignited in its lower part where the low-temperature fluidized bed of inert material is located; then, it is burned completely in the upper part of the furnace at a temperature of 1000–1200℃. Thus, in the context of the growing use of highsulfur coal, the evolution of technological systems in the thermal power industry of Irkutsk Oblast places its cleaning within the scope of activities of power companies. The main method of reducing the emissions of sulfur compounds consists in the low-temperature combustion of fuel using desulfurized coal water slurry.
Catalytic effect of carbide-forming oxides on the graphitization of carbon objects used in metallurgy
Authors: Erokhina О. О. , Pirogova N. A. 
Published: January 2025

The paper aims to study the possibility of using carbide-forming oxides as catalysts for the graphitization of objects used in metallurgy. Published data on the role of catalysts (carbide-forming metals and their oxides) for the graphitization of carbon materials was analyzed. These graphitization catalysts are shown to be able to significantly reduce the graphitization temperature. The physicochemical properties characteristic of carbon materials graphitized without the use of catalysts are preserved. It was revealed that in the case of bulk materials, the graphitization temperature can be reduced to 1200–1500℃ with the use of catalysts (as opposed to 2000ºС and above). The mechanism of catalytic graphitization involving two reactions is described: interaction between a metal (or its oxide) and carbon with the formation of carbide; subsequent formation of pure metal and carbide-like graphite with increasing temperature. The resulting graphite phase constitutes the crystallization nucleus. The main problem associated with the use of catalysts in the production of graphitized objects was identified—the removal of reaction products, including metals. It is shown that additional catalyst charging can be performed at the stage of mixing and forming, which results in the removal of a part of the reaction products at the stage of baking. The mechanism of removing reaction products is expected to be comparable to ash removal from the piece to be graphitized. It was proven effective for objects to contain carbide-forming oxides, even in insignificant amounts (up to 5 wt%). Due to this, as well as given the possibility of catalyst selection, the negative effect of excessive oxide content in the charge can be reduced depending on further operating conditions. Thus, the use of catalysts for the graphitization of electrodes used in metallurgy is a promising way to reduce the process temperature. However, it is required to select the optimal oxide content and adjust the conditions of electrothermal processes in order to adapt the technology for large-sized products.
Quality and Oxidative Stability of Tallow Extracted by Dry- and Wet-Rendering
Authors: Amaryllis Anggia Risty , Aflah Almira Tsania , Vera Nur , Erwanto Yuny , Utama Dicky Tri , Abidin Mohammad Zainal 
Published: January 2025

The oxidative stability of oil or fats is an essential parameter to determine the quality of products. Commonly, tallow is extracted by dry- and wet-rendering, both methods depend upon the water requirement. The study aims to examine the quality and oxidative stability of tallow from both methods, along with different temperatures (25°C and 4°C) and storage times. Tallow was analyzed for quality changes such as acid value (AV), peroxide value (PV), thiobarbituric acid (TBA), fatty acid profile, and differential scanning calorimetry (DSC) to indicate oxidative stability. According to research, acid value (AV) and thiobarbituric acid (TBA) were considered acceptable during storage for 180 days, as per the Codex Standard and FAO/WHO for Named Animal Fats CODEX STAN 211–1999 for edible fats and oils. However, peroxide oxide value (PV) did not meet the acceptable limit for dry- and wet-rendering and storage time of 180 days at 25°C, with values of 17.3 and 16.9 meq O2/kg, respectively. This indicates that fat oxidation increases during storage (p<0.05), while temperature and rendering methods do not significantly impact fat hydrolysis inhibition for 180 days (p>0.05). Even at 4°C, both temperatures failed to preserve tallow quality, as confirmed by fatty acid profiles and differential scanning calorimetry. The result indicates that neither method nor temperature can prevent the inhibition of fat hydrolysis from natural oxidation for a longer storage time of 180 days.
Proposta de um Software para um Restaurante Universitário utilizando a metodologia Design Centrado no Usuário
Authors: Belisario Luiz Fernando Barboza , Santos Silva Luan Carlos 
Published: January 2025

O restaurante universitário (RU) de universidades públicas, em especial o da Universidade Federal da Grande Dourados (UFGD) é uma iniciativa importante para fornecer refeições acessíveis aos estudantes e à comunidade acadêmica, promovendo a igualdade social e contribuindo para a permanência dos alunos na universidade. Com o objetivo de aprimorar a gestão e a experiência dos usuários neste ambiente, propõe-se o desenvolvimento do "Menu Acadêmico", um software centrado no usuário. O problema de pesquisa aborda como a aplicação de tecnologias da informação pode melhorar a experiência dos usuários do restaurante universitário, visando aumentar a satisfação e eficiência no acesso aos serviços oferecidos. O objetivo desta pesquisa consistiu em desenvolver um software para o RU da UFGD, aplicando a metodologia Design Centrado no Usuário (DCU) para atender às necessidades dos usuários de forma eficaz. O estudo baseia-se em uma abordagem qualitativa, combinando pesquisa bibliográfica, documental e estudo de campo. Seguindo as etapas da metodologia DCU, foram coletados dados, analisadas informações e geradas soluções para melhorar o software proposto, com foco na experiência do usuário. O "Menu Acadêmico", desenvolvido em 2023, é uma inovação que otimiza processos no RU da UFGD, refletindo o compromisso com a excelência e satisfação dos usuários. O software desenvolvido está disponibilizado de forma gratuita para que outras universidades públicas brasileiras possam conhecer suas funcionalidades, utilizar para melhorar a gestão dos restaurantes e o relacionamento com os usuários. A aplicação das fases do DCU garantiu a consideração das necessidades dos usuários desde a concepção do software. Com isso, o estudo contribui para avançar nas fases subsequentes da metodologia DCU, além de fornecer uma base para futuras pesquisas na área de tecnologia aplicada à gestão de restaurantes universitários brasileiros. Tecnologicamente, oferece uma comunicação mais eficaz com os usuários, uma experiência aprimorada e oportunidades contínuas de melhoria com base no feedback dos usuários e na análise de dados. Sua implementação trará benefícios imediatos e oportunidades futuras de aprimoramento contínuo.
متطلبات تحقيق الأمن السيبراني بجامعة نزوى في ضوء رؤية عمان 2040 ومعوقاته من وجهة نظر الأكاديميين والموظفين
Authors: البلوشية نجلاء موسى محمد , الرواحية طيبة سيف حمد , العامرية بدريه حمود سعيد , الذهلي ربيع المر علي , اليحمدي حمد هلال حمد , القضاة محمد إسماعيل عبدالله 
Published: January 2025

هدفت الدراسة الحالية إلى التعرف على متطلبات تحقيق الأمن السيبراني ومعوقاته في جامعة نزوى وفق رؤية عمان 2040 من وجهة نظر أكاديمي وموظفي جامعة نزوى، واستخدم الباحثون المنهج الوصفي التحليلي المسحي والاستبانة كأداة للدراسة، طبقت على عينة من (186) أكاديميا وموظفا. وتوصلت نتائج الدر2040 تبعاجة متطلبات تحقيق الأمن السيبراني في جامعة نزوى وفق رؤية عمان 2040 من وجهة أكاديمي وموظفي جامعة نزوى جاء بمتوسط (2.04)، بانحراف معياري (0.58)، وهي درجة منخفضة، كما جاءت جميع المجالات بدرجة منخفضة، وجاءت المتطلبات التقنية في الرتبة الأولى، يليه المتطلبات معرفية الرتبة الثانية والمتطلبات البشرية في الرتبة الثالثة، وفي الأخير جاءت المتطلبات، كما أن درجة معوقات تحقيق الأمن السيبراني في جامعة نزوى وفق رؤية عمان 2040 من وجهة أكاديمي وموظفي جامعة نزوى جاء بمتوسط (2.67)، بانحراف معياري (0.89)، وهو بدرجة متوسطة، كما كشفت النتائج إلى عدم وجود فروق ذات دلالة إحصائية عند مستوى الدلالة (α≤0.05) بين متوسطات تقديرات أفراد عينة الدراسة لمتطلبات تحقيق الأمن السيبراني في ضوء رؤية عمان 2040 تبعا لمتغير الجنس في جميع المجالات، والدرجة الكلية، بينما توجد فروق دالة في مجال المتطلبات التقنية ولصالح الذكور، وعدم وجود فروق ذات دلالة إحصائية عند (α≤0.05) بعا لمتغير الرتبة الأكاديمية، وبناء على النتائج أوصى الباحثون بالاستمرار في توفير متطلبات تحقيق الأمن السيبراني في جامعة نزوى وتدريب الأكاديميين والموظفين لمواكبة المستجدات التكنولوجية، والتصدي لتطور أنواع الهجمات الإلكترونية.
أثر تكنولوجيا المعلومات على ممارسات إدارة الموارد البشرية من وجهة نظر موظفي إدارة التعليم بجدة
Authors: الحربي أروى محمد , الماطوسي هندة سالم 
Published: January 2025

هدفت الدراسة إلى تقييم أثر تكنولوجيا المعلومات على ممارسات إدارة الموارد البشرية في إدارة تعليم جدة، مع التركيز على الأجهزة التكنولوجية، البرمجيات، قواعد البيانات، الشبكات والاتصالات، وموظفي تكنولوجيا المعلومات. كما استخدمت الدراسة المنهج الوصفي التحليلي، و استبانة وزعت على عينة بلغت 110 فرداً من منسوبي إدارة تعليم جدة. وقد أظهرت النتائج أن استخدام تكنولوجيا المعلومات له أثر إيجابي وملحوظ على ممارسات إدارة الموارد البشرية، حيث تسهم الأجهزة التكنولوجية في تحسين جودة العمليات وتوفير التدريب اللازم للموظفين. كما أشارت الدراسة إلى أهمية البرمجيات في تسهيل اتخاذ القرارات وسرعة تنفيذها بكفاءة، وأهمية قواعد البيانات في ضمان دقة وتوفر المعلومات. بالإضافة إلى ذلك، تسهم الشبكات والاتصالات في تسهيل الإنجازات الإدارية بفعالية، وتدريب موظفي تكنولوجيا المعلومات وتلقي التغذية الراجعة منهم (بين اختبار الارتباط لبيرسون أنه يوجد ارتباط قوي وذو دلالة معنوية بين موظفي التقنية ومتغير الشبكات والاتصالات حوالي0.78، واقل اهمية مع متغير قواعد البيانات بحوالي 0.68). كما تظهر النتائج أن استخدام الأجهزة التكنولوجية (المتوسط الحسابي: 4.68، الانحراف المعياري: 0.73) واستخدام البرمجيات (المتوسط الحسابي: 3.98، وقواعد البيانات (المتوسط الحسابي: 4.22، الانحراف المعياري: 0.76) والشبكات والاتصالات (المتوسط الحسابي: 4.26، واستخدام موظفي IT للتكنولوجيا (المتوسط الحسابي: 4.07، الانحراف المعياري: 0.73) تؤثر بشكل إيجابي ومرتفع على تحسين ممارسات إدارة الموارد البشرية (متوسط حسابي للنموذج القياسي ككل: 4.24 وتوصي الدراسة بتعزيز استخدام تكنولوجيا المعلومات في مجال إدارة الموارد البشرية، وتحسين جودة التدريب المقدم للموظفين وتطوير آليات فعالة لجمع واستخدام البيانات للمساعدة في اتخاذ القرار. وتُعد هذه التوصيات نقطة انطلاق للبحوث المستقبلية في مجال تكنولوجيا المعلومات وإدارة الموارد البشرية، وذلك في قطاع التعليم بمختلف مناطق المملكة العربية السعودية.
أثر خصائص نظم المعلومات المحاسبية على الأداء التنظيمي باستخدام أساليب القيادة: دراسة ميدانية على الشركات المساهمة الصناعية السعودية
Authors: العسيري شهد أحمد , عبيد راوية رضا 
Published: January 2025

هدفت الدراسة الحالية إلى دراسة أثر خصائص نظم المعلومات المحاسبية على الأداء التنظيمي باستخدام أساليب القيادة في الشركات المساهمة الصناعية السعودية، بينما تتركز مشكلة الدراسة في معرفة أثر خصائص نظم المعلومات المحاسبية على الأداء التنظيمي (التخطيط، الرقابة) باستخدام أساليب القيادة في الشركات المساهمة الصناعية السعودية. حيث تكمن أهمية نظم المعلومات المحاسبية أنه يمكن الاستفادة المباشرة من نتائجها من مختلف مستويات العاملين في الشركات في مجال الرقابة والمراجعة واتخاذ القرارات، بينما اعتمدت الدراسة على المنهج الوصفي التحليلي والاستبانة كأداة لقياس متغيرات الدراسة والتي طُبقت على المدراء العاملين في مجال المحاسبة، المحاسبين، المراجعين الداخليين العاملين في الشركات الصناعية المساهمة في المملكة العربية السعودية.وقد توصلت الدراسة إلى النتائج التالية:أن الشركات المساهمة الصناعية السعودية، تقوم بتطبيق نظم المعلومات المحاسبية بدرجة مرتفعة. وأن الشركات المساهمة الصناعية السعودية، تقوم بتطبيق أساليب القيادة بدرجة مرتفعة. كما أوصت الدراسة باستمرار الشركات المساهمة الصناعية السعودية، بتطبيق خصائص نظم المعلومات المحاسبية والعمل على تطوير أساليب تطبيقها. والعمل على زيادة نسبة الوعي للعاملين في الشركات المساهمة الصناعية السعودية فيما يتعلق بخصائص نظم المعلومات المحاسبية، من خلال ورش العمل والدورات والندوات العلمية التي تعنى بهذا الموضوع، وتشجيع هذه الأطراف على متابعة معايير الإبلاغ المالي الدولية بشتى الوسائل المتاحة.
Key Account Management, Brand Innovation and Marketing Performance of SMEs
Authors: Kankam-Kwarteng C. , Sarpong A. 
Published: January 2025

Purpose: The paper assesses the influence of key account management (KAM) and brand innovation on small and medium-sized enterprises (SMEs) marketing performance.
Design/Methodology/Approach: The study draws on an explanatory research design to administer questionnaires to 200 business operators in the Kumasi metropolis of the Ashanti region. The sampling process is based on the availability and willingness of SME business operators to participate. Output from SPSS and SmartPLS was used for structural equation modelling to estimate the hypothesised relationships between KAM practices, brand innovation, and marketing performance.
Findings: The results support the proposed relationships, demonstrating that KAM practices significantly impact the marketing performance of SMEs, specifically customer-oriented profitability and customer-oriented relationships. The findings further indicate that brand innovations mediate the influence of KAM practices on marketing performance.
Research Limitation: Given that most respondents were top management of SMEs, there is a strong possibility of bias in the information provided, as they may have withheld details that could cast their organisation in a negative light.
Practical Implication: The paper contributes to the operational dimensions of SMEs on the practical importance of implementing KAM practices and brand innovations to achieve higher marketing performance.
Social Implication: The paper will help policymakers appreciate areas of business operations that require attention when developing policies aimed at the long-term survival of SMEs.
Originality/Value: The study enhances our theoretical appreciation of how KAM and Brand innovation practices lead to marketing performance.
Africanfuturism and Magical Realism In Okorafor’s ‘Hello Moto’
Authors: Amran M. Daffa Aufa Rifqi , Astutiningsih Irana , Kusumayanti Dina Dyah , Khazanah Dewianti 
Published: January 2025

This article uses the concepts of Magical Realism by Wendy B. Faris (2004) and Africanfuturism by Okorafor (2019) to analyze ‘Hello Moto’ by Nnedi Okorafor (2011). We analyzed the magical elements and concepts of African futurism in Okorafor's short stories to explain the author's intention in writing her works, which mostly use similar themes such as postcolonialism. After analyzing these two concepts, it was found that Nnedi Okorafor, through her work 'Hello Moto' reflects a postcolonial perspective on cultural hybridity by presenting advanced technology in the form of wigs and combining it with the power of black magic which can release powers such as transmission and mind control. There is a blend of Eastern and Western culture in 'Hello Moto' based on the above explanation. The contribution of this study lies in its exploration of Africanfuturism uniquely represented in Okorafor’s ‘Hello Moto’ as a medium for postcolonial discourse, showcasing how her work reimagines technological advancement through an African cultural lens while bridging traditional and modern worlds. AbstrakArtikel ini menggunakan konsep Realisme Magis oleh Wendy B. Faris (2004) dan Africanfuturisme (2019) untuk menganalisis ‘Hello Moto’ karya Nnedi Okorafor (2011). Kami menganalisis elemen magis dan konsep africanfuturisme yang terdapat di dalam cerita pendek karya Okorafor untuk menjelaskan niat penulis menulis karya-karyanya yang kebanyakan menggunakan tema yang serupa yakni tentang poskolonialisme Setelah menganalisis kedua konsep tersebut, ditemukan bahwa Nnedi Okorafor melalui karyanya ‘Hello Moto’ mencerminkan perspektif postkolonial tentang hibriditas budaya dengan menghadirkan teknologi canggih berupa wig dan memadukannya dengan kekuatan ilmu hitam yang dapat melepaskan kekuatan seperti teleportasi dan pengendalian pikiran. Terdapat perpaduan budaya Timur dan Barat dalam ‘Hello Moto’ berdasarkan penjelasan di atas. Kontribusi penelitian ini terkait dengan eksplorasi Afrofuturism sebagaimana direpresentasi dalam ‘Hello Moto’ sebagai media wacana pascakolonial, dimana kemajuan teknologi di kultur Afrika digambarkan dengan cara menjembatani dunia tradisional dan modern.
Speech Acts Production in EFL Classroom Interactions (A Conversation Analysis)
Authors: Darong Hieronimus Canggung 
Published: January 2025

The purpose of this study was to analyze the speech act types and functions that were used by an EFL teacher and their students during classroom interactions. Observational data was collected and analyzed according to Conversation Analysis standards (CA). The findings of the study revealed that the types of speech acts produced by the teacher and students were influenced by their respective roles and statuses. Although the students produced fewer speech acts, they served the same functions as the teacher's speech acts in terms of controlling and managing classroom interactions. As a result, the speech acts of both the students and teacher distributed authority in different ways during turn-taking and commodity exchanges. The practical knowledge and pedagogical aspect of the teacher-student relationship as a unique social event in the classroom context has the potential to effectively manage classroom interactions. AbstrakTujuan penelitian ini adalah untuk menganalisis jenis dan fungsi tindak tutur yang diucapkan oleh seorang guru Bahasa Inggris dan siswa dalam interaksi di kelas. Data hasil observasi dikumpulkan dan dianalisis sesuai dengan prinsip-prinsip analisis percakapan (CA). Temuan penelitian menunjukan bahwa jenis tindak tutur yang dihasilkan oleh guru dan siswa dipengaruhi oleh peran dan status masing-masing. Meskipun siswa menghasilkan lebih sedikit tindak tutur, mereka memiliki fungsi yang sama dengan tindak tutur guru dalam hal mengontrol dan mengelola interaksi di kelas. Dengan demikian, tindak tutur siswa dan guru mendistribusikan otoritas dengan cara yang berbeda selama pertukaran ide dan proposisi percakapan. Pengetahuan praktis dan asoek pedagogis hubungan guru-siswa sebagai peristiwa sosial yang unik memiliki potensi untuk mengelola interaksi kelas secara efektif.