bluuebunny/crossref_metadata_2025 huggingface dataset:
A Study of the Performance Requirements and Construction Rules for 700°C Advanced USC Power Plants
Authors: Yoshida K. , Sato T.
Published: February 2025

In response to the need to reduce carbon dioxide gas emissions, Japan has been actively researching 700°C-class thermal power plants with a focus on improving overall plant efficiency. This technological advancement is fundamentally grounded in advanced materials development, encompassing the creation of high-strength alloys, fireside corrosion-resistant materials, and steamside oxidation-resistant alloys. A significant challenge emerged as some of the developed materials fell outside the scope of existing domestic technical standards. Moreover, the potential failure modes for advanced ultra-supercritical (A-USC) components operating at 700°C were anticipated to differ substantially from those observed in traditional ultra-supercritical (USC) components at 600°C. Consequently, researchers systematically examined and analyzed the potential failure modes specific to 700°C A-USC components, using these insights to establish comprehensive performance requirements. The research initiative, which commenced in June 2006, was strategically planned to develop a draft technical interpretation by March 2011. This paper provides a detailed overview of the investigative process, encompassing the comprehensive analysis of failure modes, the derivation of performance requirements, and the progression toward developing a new technical interpretation framework for high-temperature power plant components.
Development of Low Thermal Expansion Ni Base Superalloy for Steam Turbine Applications
Authors: Ohno Takehiro , Toji Akihiro , Uehara Toshihiro , Bao Gang , Sato Takashi , Sato Jun , Imano Shinya
Published: February 2025

The operating temperature of ultrasupercritical (USC) power plants is increasing, with planned temperatures reaching up to 700°C. Austenitic superalloys are promising alternatives to ferritic heat-resistant steels due to their potential for high strength at temperatures around 650-700°C. While austenitic nickel-base superalloys generally exhibit higher creep rupture strength than ferritic heat-resistant steels, they also have drawbacks, including higher thermal expansion, lower creep rupture ductility, and increased costs. Initially, the researchers focused on developing a molybdenum-containing superalloy to achieve low thermal expansion. They systematically investigated the effects of molybdenum and cobalt content, gamma prime phase amount, and aluminum/titanium ratio on thermal expansion, tensile properties, and creep-rupture properties. These investigations were conducted using the conventional molybdenum-containing Alloy 252 as a reference. The developed superalloy, notably free of cobalt and combined with a modified heat treatment, demonstrated significantly improved creep rupture elongation compared to Alloy 252, while maintaining low thermal expansion and high creep rupture strength similar to the reference alloy. Additionally, the research evaluated creep-rupture properties at 700°C for up to approximately 20,000 hours to assess long-term applications. The study also examined the weldability and mechanical properties of weld joints at 750°C, focusing on potential boiler tube applications.
Stress Dependence of Degradation and Creep Rupture Life of Creep Strength Enhanced Ferritic Steels
Authors: Kimura K. , Sawada K. , Kushima H. , Toda Y.
Published: February 2025

The long-term creep strength of creep strength-enhanced ferritic steels has been overestimated due to changes in the stress dependence of creep rupture life at lower stress levels. To address this, creep rupture strength has been reassessed using a region-splitting analysis method, leading to reductions in the allowable tensile stress of these steels as per Japan’s METI Thermal Power Standard Code in December 2005 and July 2007. This method evaluates creep rupture strength separately in high and low stress regimes, divided at 50% of the 0.2% offset yield stress, which corresponds approximately to the 0% offset yield stress in ASME Grade 122-type steels. In the high-stress regime, the minimum creep rate follows the stress dependence of flow stress in tensile tests, with the stress exponent (n) decreasing from 20 at 550°C to 10 at 700°C. In contrast, the low-stress regime exhibits an n value of 4 to 6 for tempered martensitic single-phase steels, while dual-phase steels containing delta ferrite show an even lower n value of 2 to 4. The significant stress dependence of creep rupture life and minimum creep rate in the high-stress regime is attributed to plastic deformation at stresses exceeding the proportional limit. Meanwhile, creep deformation in the low-stress regime is governed by diffusion-controlled mechanisms and dislocation climb as the rate-controlling process.
16-8-2 and Other Weld Metal Compositions that Utilize Controlled Residual Elements to Enhance and Maintain Elevated Temperature Creep Strength
Authors: Newell William F.
Published: February 2025

Achieving high temperature creep strength while maintaining rupture ductility in weld metal for austenitic stainless steel weldments has always been challenging. In the late 1940's and early 1950's, independent work in both Europe and the USA resulting in what is known today as the 16-8-2 (nominally16% chromium -8% nickel -2% molybdenum) stainless steel weld metal. Philo 6 and shortly thereafter at Eddystone used the alloy to construct the first supercritical boilers and piping in the USA. Concurrent with domestic boiler and piping fabrication, the US Navy was also using this material for similar supercritical applications. Over the decades, enhanced performance has evolved with variations of the basic composition and by adding specific residual elements. Controlled additions of P, B, V, Nb and Ti have been found to greatly enhance elevated temperature as well as cryogenic behavior. The history of these developments, example compositions and areas of use as well as mechanical property results are presented.
Welding of Dissimilar Joints of New Power Plant Steels
Authors: Heuser H. , Jochum C. , Bendick W. , Hahn B. , Fuchs R.
Published: February 2025

In conventionally fired power plants, appropriate materials are required which correspond to the different temperature and oxidizing conditions in the boiler and in the superheater sections. Pipe steels with 2 1/4 Cr (P22; T23; T24) must be welded to 9 - 12 % Cr steels (P91; E911; P92; VM12). In this area, the choice of the appropriate welding filler material is vital for the quality of the weldment. This report highlights the possibilities for achieving optimal properties in differing dissimilar metal welds under conditions of reduced carbon diffusion.
المعوقات التي تواجه طلبة الصفوف الثلاثة الأولى في اكتساب مهارة التحدث من وجهة نظر معلمات اللغة الإنجليزية
Authors: الصوص حنان عوني , حمزة محمد عبد الوهاب
Published: February 2025

الأهداف: هدفت الدراسة التعرف إلى المعوقات التي تواجه طلبة الصفوف الثلاثة الأولى في اكتساب مهارة التحدث من وجهة نظر معلمات اللغة الإنجليزية في لواء ناعور- الأردن. المنهجية: تم استخدام المنهج الوصفي، ولتحقيق هدف هذه الدراسة تم تطوير استبانة معوقات مهارة التحدث، مكونة من (26) فقرة، ووزعت في أربعة مجالات هي: معوقات تتعلق بالطالب، معوقات تتعلق بالوسائل والتقنيات التعليمية، معوقات تتعلق بالمقرر الدراسي، معوقات تتعلق بالمعلم. حيث تم تطبيقها على عينة من معلمات اللغة الإنجليزية، التابعة لمديرية التربية والتعليم للواء ناعور، وبلغت عينة الدراسة (105) معلمة. النتائج: أظهرت النتائج أن مجال معوقات تتعلق بالطالب جاء بالمرتبة الأولى، ومجال معوقات تتعلق بالمعلم جاء بالمرتبة الأخيرة، وتوصلت الدراسة إلى عدم وجود فروق ذات دلالة إحصائية في المعوقات التي تواجه طلبة الصفوف الثلاثة الأولى في اكتساب مهارة التحدث من وجهة نظر معلمات اللغة الإنجليزية تعزى لمتغيري (المؤهل العلمي وسنوات الخبرة)، في حين تبين وجود فرق دال إحصائيًا في استجابات معلمات اللغة الإنجليزية حول المعوقات التي تتعلق بالمقرر الدراسي، تبعًا لمتغير سنوات الخبرة، ولصالح المعلمات الذين خبرتهم أقل من (5) سنوات. الخلاصة: توصي الدراسة بزيادة الاهتمام بمهارة التحدث في تعليم اللغة الإنجليزية لطلبة المرحلة الأساسية في الأردن.
درجة معرفة معلمي الرياضيات للمرحلة الأساسية الدنيا لإستراتيجيات ما وراء المعرفة من وجهة نظرهم
Authors: عمرو ايه جمال , دروزه أفنان نظير
Published: February 2025

الأهداف: هدفت الدراسة إلى الكشف عن درجة معرفة معلمي الرياضيات للمرحلة الأساسية الدنيا في المدارس الحكومية والخاصة التابعة لتربية وتعليم الخليل في فلسطين لإستراتيجيات ما وراء المعرفة من وجهة نظرهم. المنهجية: اتبعت الدراسة المنهج الوصفي التحليلي، وتم بناء استبانة تقيس درجة المعرفة للمعلمين بإستراتيجيات ما وراء المعرفة، حيث تم اختيار 120 معلم ومعلمة كعينة عشوائية بسيطة منهم (41) ذكر و(79) أنثى، وتم تحليل النتائج باستخدام أساليب إحصائية مختلفة. النتائج: خلصت الدراسة إلى مجموعة من النتائج أهمها أنّ المتوسط العام لمعرفة معلمي الرياضيات للمرحلة الأساسية الدنيا لإستراتيجيات ما وراء المعرفة كبير جدًا، أمّا بالنسبة لمجالات استراتيجيات ما وراء المعرفة فقد كانت كبيرة جدًا، وتوجد فروق ذو دلالة إحصائية بين متوسط معرفة معلمي الرياضيات للمرحلة الأساسية الدنيا لإستراتيجيات ما وراء المعرفة يعزى للجنس لصالح الإناث، ولا يوجد فروق ذات دلالة بين متوسطات معرفة معلمي الرياضيات للمرحلة الأساسية الدنيا لإستراتيجيات ما وراء المعرفة يعزى للمؤهل العلمي، وسنوات الخبرة التعليمية، والعمر الزمني. الخلاصة: خلصت الدراسة إلى إجراء مزيد من الدراسات المستقبلية التي تربط بين المعرفة النظرية والعملية لإستراتيجيات ما وراء المعرفة، والبحث بمزيد من الدراسات بمزيد من الدراسات التي تدرس تأثير متغير الجنس في توظيف إستراتيجيات الإدراك الفوق معرفية في تدريسهم وفيما إذا كان الإناث يتفوقن على الذكور في هذا المجال أم لا.
أثر القيادة الريادية على الإبداع الإداري للعاملين في المعهد العالي للقضاء بسلطنة عُمان
Authors: عبدي الحاج عمر , الناعبي يعقوب بن سالم , الهنائية منى بنت علي , الحبسية رضيه بنت سليمان , القصابي خليفة بن أحمد , الذهلي ربيع بن المر
Published: February 2025

الأهداف: هدفت الدراسة الحالية إلى الكشف عن أثر القيادة الريادية على الإبداع الإداري لدى العاملين بالمعهد العالي للقضاء بسلطنة عُمان. المنهجية: تم استخدام المنهج الوصفي، كما استخدمت استبانة مكونة من (40) فقرة موزعة على محورين هما، القيادة الريادية (أبعادها: الرؤية الاستراتيجية، الإبداع، الاستباقية، وتحمل المخاطر) والإبداع الإداري (أبعاده: الأصالة، الطلاقة، المرونة، والقدرة على التحليل)، وبعد التأكد من الصدق والثبات للأداة تم تطبيقها على 60 موظفًا وموظفة من العاملين بالمعهد العالي للقضاء. النتائج: أظهرت النتائج أن درجة ممارسة القيادة الريادية مرتفعة، وأن مستوى الإبداع الإداري لدى العاملين في المعهد العالي للقضاء مرتفعًا، مع تأثير ذات دالة إحصائيًا لأبعاد القيادة الريادية (باستثناء تحمل المخاطر) على الإبداع الإداري. وكانت الرؤية الاستراتيجية والإبداع من أبرز العوامل المؤثرة. الخلاصة: أوصت الدراسة بتعزيز ثقافة الابتكار، وتقديم برامج تدريبية لتطوير مهارات القيادة الريادية والإبداع، مع توفير بيئة تشجع على المخاطرة المدروسة، وتدعم التفكير الإبداعي لتحقيق التميز المؤسسي.
Kelimpahan Bivalvia pada Ekosistem Padang Lamun di Bintan Utara
Authors: Hidayat Rommy , Nugraha Aditya Hikmat
Published: February 2025

Perairan Bintan Utara memiliki sebaran ekosistem lamun cukup luas dengan kondisi yang baik, serta jenis komposisi substrat pada lamun juga berbeda-beda, sehingga cocok menjadi habitat bagi bivalvia sebagai tempat mencari makan, berkembang biak, memijah dan berlindung. Hubungan bivalvia dengan lamun memiliki dampak terhadap siklus makanan, mempengaruhi keberadaan dan komposisi bivalvia. Tujuan penelitian ini yaitu untuk mengukur tutupan lamun, identifikasi, dan kepadatan jenis bivalvia yang berasosiasi dalam ekosistem padang lamun di perairan Bintan Utara. Penelitian dilakukan di perairan Bintan Utara pada bulan September hingga Oktober 2022 (Tanjunguban Utara, Pantai Pengudang dan Pantai Bakau Terang). Alat dan bahan yang digunakan dalam penelitian yaitu GPS, transek kuadrat 50x50cm, roll meter, jangka sorong/penggaris, multitester, hand refractometer, pH meter, alat tulis, Kamera dan boots karet. Metode sampling menggunakan 3 transek dengan panjang 100m kearah laut dengan jarak antar transek yaitu 50m, dengan transek 50x50cm dimulai dari titik 0 sampai 100m dengan jarak antar frame kuadrat yaitu 10m. Analisis data yang digunakan dalam penelitian yaitu tutupan lamun, identifikasi bivalvia dan kepadatan bivalvia. Terdapat 7 jenis lamun yang ditemukan dari ketiga stasiun penelitian yaitu: Enhalus acoroides, Thalassia hemprichii, Cymodocea serrulata, Cymodocea rotundata, Halodule uninervis, Halodule pinifolia dan Syringodium isoetifolium. Tutupan lamun tertinggi diperoleh di perairan Pantai Pengudang sebesar 48,3% dikategorikan tutupan lamun yang sedang. Ditemukan sebanyak 21 jenis bivalvia yang berada dari ketiga lokasi penelitian. Adapun jenis bivalvia yang banyak ditemukan yaitu Gafrarium pectinatum. Kepadatan bivalvia tertinggi terdapat di perairan Pantai Bakau Terang sebesar 16,24 ind/m2. Jenis bivalvia dengan kepadatan tertinggi yaitu Gafrarium pectinatum sebesar 8,24 ind/m2.
Evaluasi Rencana Peruntukan Ruang Kota Tanjungpinang Terhadap Kesesuaian Habitat Ekosistem Mangrove Berdasarkan Kriteria Ekologi
Authors: Noviyati Syamsinar , Haryanti Dewi , Lestari Febrianti , Ismail Khodijah , Zulfikar Andi
Published: February 2025

Ekosistem mangrove penting bagi wilayah kepulauan untuk melindungi pantai dari bahaya gelombang tinggi yang mengakibatkan banjir dan erosi pantai. Namun, mangrove hanya dapat tumbuh pada kondisi sesuai kriteria ekologi ekosistem mangrove. Pelestarian ekosistem mangrove perlu diintegrasikan kedalam perencanaan tata ruang kota pesisir. Menyusun rencana tata ruang kota pesisir di pulau kecil harus adaptif terhadap perubahan lingkungan dengan berbasis pada ekologi ekosistem pesisir. Penelitian ini bertujuan untuk membandingkan hasil analisis kesesuaian habitat mangrove dengan rencana pola ruang RDTR Kota Tanjungpinang. Kesesuaian habitat ekosistem mangrove di Kota Tanjungpinang berdasarkan kriteria ekologi mangrove diperoleh luas lahan yang sangat sesuai yaitu seluas 1227,87 Ha, sesuai 2651,52 Ha, dan kriteria cukup sesuai dengan luas 412,84 Ha. Zona budidaya antara lain berupa zona perumahan, perdagangan jasa, perkantoran, industri pada rencana peruntukan ruang RDTR Kota Tanjungpinang berada pada lahan yang memiliki kesesuaian habitat ekosistem mangrove berdasarkan kriteria ekologi.
Produksi Perikanan Tangkap di Kota Gunungsitoli Provinsi Sumatera Utara
Authors: Telaumbanua Betzy Victor , Zebua Ratna Dewi , Laoli Destriman , Zebua Okniel , Dawolo Januari
Published: February 2025

Penelitian ini bertujuan untuk menyajikan data empiris mengenai produksi perikanan laut di Kota Gunungsitoli sepanjang periode 2019-2023. Penelitian ini diharapkan dapat memberikan gambaran yang jelas tentang tren produksi perikanan di Kota Gunungsitoli selama lima tahun terakhir. Penelitian dilaksanakan pada bulan April hingga Juli 2024 di Fakultas Sains dan Teknologi Universitas Nias. Penelitian ini menggunakan data sekunder yang diakses secara online dari situs web Badan Pusat Statistik Kota Gunungsitoli. Metode deskriptif digunakan dalam penelitian ini yang didasarkan pada kajian literatur dan analisis data sekunder. Data yang dianalisis mencakup volume produksi perikanan tangkap serta faktor-faktor yang mempengaruhinya. Proses pengumpulan dan analisis data dilakukan dengan menggunakan software Microsoft Excel, dan didukung oleh kajian literatur dari artikel ilmiah terkait. Berdasarkan hasil penelitian menunjukkan adanya variasi dalam volume produksi perikanan tangkap di Kota Gunungsitoli selama periode penelitian. Faktor-faktor seperti kondisi ekologis perairan, teknologi penangkapan ikan, dan aspek sosial-ekonomi nelayan berperan penting dalam mempengaruhi hasil tangkapan. Puncak produksi sebesar 7.068 ton pada tahun 2023. Kecamatan Gunungsitoli sebagai kontributor produksi terbesar. Terdapat empat rekomendasi kebijakan dalam meningkatkan pengelolaan sumber daya perikanan dan kesejahteraan masyarakat nelayan di Kota Gunungsitoli, yaitu pengembangan infrastruktur perikanan, penelitian dan pengembangan, diversifikasi lokasi penangkapan ikan, serta pelatihan dan edukasi.
Aspek Biologi Teripang Parean (Holothuria hilla) yang Ditangkap di Perairan Jepara Jawa Tengah
Authors: Salsabila Astrhia Pawitra , Suharti Ratna , Irawan Hendra , Bramana Aditya
Published: February 2025

Penelitian tentang Aspek Biologi Teripang Parean (Holothuria hilla) bertujuan untuk mengetahui hubungan panjang berat, indeks kematangan gonad (IKG), tingkat kematangan gonad (TKG), fekunditas, dan ukuran biologi minimum di Perairan Jepara. Penelitian ini dilakukan dari bulan Agustus 2023 hingga Oktober 2023. Lokasi penelitian dibagi menjadi dua Lokasi yaitu, Kelompok Usaha Bersama (KUB) Berkah Samudera dan nelayan Ujungbatu. Metode yang digunakan adalah metode random sampling dengan melakukan pengukuran Teripang Parean pada dua Lokasi tersebut sebanyak 1000 ekor. Berdasarkan 1000 ekor sampel Teripang Parean tersebut dilakukan pengukuran panjang bobot, selanjutnya teripang dibedah menggunakan pisau untuk mengetahui Tingkat kematangan gonad maupun pengukuran berat gonad untuk mengetahui indeks kematangan gonad. Kemudian dipisahkan 40 ekor Teripang Parean betina yang termasuk dalam TKG IV dan TKG V untuk perhitungan fekunditasnya, Data hasil penelitian menunjukkan bahwa Teripang Parean yang tertangkap di Perairan Jepara mempunyai pola pertumbuhan allometrik negatif yaitu pertambahan panjang lebih cepat dari pertambahan bobot, tingkat kematangan gonad (TKG) rata-rata adalah TKG I, panjang rata-rata adalah 14 - 15 cm dan bobot rata-rata adalah 50,5 gram; rata-rata fekunditasnya adalah 4.506 - 12.917  butir telur.
Penentuan Model Silvofishery Berkelanjutan sebagai Optimalisasi Rehabilitasi Mangrove dalam Meningkatkan Produktivitas Hasil Laut di Desa Nelayan Kecamatan Medan Belawan
Authors: Daulay Aulia Putra , Sari Ratna , Simanjuntak Tito Maranata , Sinulingga Robinhot
Published: February 2025

Silvofishey merupakan perpaduan antara hutan mangrove dan perikanan dengan memperhatikan kelestarian hutan mangrove yang pengelolaannya akan berdampak positif bagi lingkungan dan sosial ekonomi masyarakat. Pemanfaatan yang berlebihan akan menyebabkan fungsi hutan tidak berjalan dengan baik, terutama sebagai jasa ekosistem. Tujuan penelitian ini adalah untuk menentukan model silvofishery yang tepat sebagai optimalisasi rehabilitasi mangrove agar pengelolaannya berkelanjutan. Desa Nelayan Seberang dipilih karena masyarakat dominan sebagai nelayan dalam memenuhi kebutuhan hidupnya dan juga hutan mangrove baru saja direhabilitasi sehingga perlu dikelola lebih baik dalam memperoleh hasil laut yang optimal. Penelitian dimulai dengan konsep dan model silvofishery melalui nelayan, masyarakat, dan pengelola lokal. Selanjutnya, pengamatan langsung dilakukan dalam mengumpulkan data tentang kesesuaian silvofishery, kepadatan vegetasi, keanekaragaman biota dan plankton. Terakhir, penentuan model silvofishery sebagai optimalisasi rehabilitasi mangrove dalam meningkatkan produktivitas hasil laut di Desa Nelayan Seberang menggunakan analisis kesesuaian silvofishery, kepadatan vegetasi, dan keanekaragaman spesies biota dan plankton. Hasil yang didapat dari penelitian yaitu kesesuaiaan lokasi penelitian untuk silvofishery, dan model silvofishery yang tepat pada lokasi penelitian ini untuk meningkatkan hasil produktivitas hasil tangkapan nelayan di Desa Nelayan Seberang.
Methods of Organizing Independent Work in German Language Classes
Authors: Riabchun Hanna
Published: February 2025

The purpose of the article is to investigate and experimentally evaluate methods for organizing independent work in German language lessons within secondary educational institutions. The following methods were employed to address the tasks: structural, systemic, theoretical (including analysis, synthesis, systematization, comparison, and classification of scientific and psychological sources of information). The theoretical material and conclusions presented in this study can serve as a foundation for master's theses and diploma projects. The proposed methods for organizing students' independent work in German language lessons can be applied in the educational process, particularly during lectures and practical classes. We conclude that the selection of an educational trajectory during the period of study at school or university is a collaborative process between the teacher and the student, aimed at developing the student's independent learning skills, setting appropriate educational goals and tasks, choosing methods, forms, means, and content of learning, as well as fostering reflection, self-assessment of personal achievements, and the development of initiative and responsibility in decision-making and problem-solving. The prospects for further research in this area lie in exploring methods for motivating students at the initial stage of forming educational goals and objectives, as well as identifying approaches for self-reflection to enhance outcomes.
Interactive technologies in the personal and professional development of a future teacher
Authors: Kaplinskyi Vasyl , Damzin Oleksandr , Teteruk Roman
Published: February 2025

The article analyzes interactive technologies of teaching in higher education in the context of the personal and professional development of future teachers: cooperative learning, interactive technologies of collective and group learning (collective discussion of the problem, brainstorming, “open marathon,” decision tree, “teaching-learning” methodology, etc.), technologies of discussion of debatable issues, business and role-playing games, trainings, master classes, project method, case method, coaching pedagogical KVK, etc. Their use ensures the effectiveness of the personal and professional development of the future teacher, as it contributes to the development of his creative potential, creates conditions for experimental research work, self-improvement, self-realization, self-affirmation, and self-educational activity, and the search for new ways and means of solving problems that arise in professional and pedagogical activity. Practice proves that interactive education stimulates cognitive activity and contributes to the formation of both subject competencies and general pedagogical ones: the development of critical thinking, the formation of self-confidence and a positive "I-concept," the development of independence and creativity, the development of communication skills, the formation of relevant life and professional competencies, the creation of an atmosphere of cooperation and effective interaction, and the improvement of success, which in turn ensures the successful formation of the future teacher as a professional and a person.
Impact of Multiple Training Programs on Physical Fitness, Body Composition, and Performance of Female Handball Players of Bahawalpur City
Authors: Majeed Aqsa , Noreen Rabia , Majeed Sadia
Published: February 2025

This study investigates how various training programs affect female handball players' body composition, fitness, and performance. Thirty female handball players (age = 20.14±1.23 years) were equally divided into three groups, such as a specific group, a medicine ball group, and a strength group. The selected variables were endurance, agility, speed, flexibility, vertical jump, skinfolds, girths, breadths, height, and weight. To compare the groups' performance, anthropometric, and physical fitness, ANOVA for statistical analysis. Results showed that the medicine ball training group was significantly higher in elbow angle (P < 0.01), ball speed (P < 0.02), agile ( P < 0.00), hand grip strength (P < 0.01), endurance (P < 0.04), sit-ups (P < 0.04), standing board jump (P < 0.05), 7-meter throw, and reduction in fat percentage than the other training groups. It was concluded that six weeks of medicine ball training enhanced the performance of female handball players.
An Ecofeminist Perspective of Dystopia: Othering, Resistance, and Transformation in Atwood's The Year of the Flood
Authors: Gull Hina , Riaz Nailah
Published: February 2025

This article explores the poetics and politics of the new canon, feminist critical dystopia, and ostracization of Nature to glorify the potential for creating a space in order to highlight activism and rebellion in the text The Year of the Flood (2009) by Margret Atwood. This comparative study of selected work sheds light on the issues of female objectification, oppression of Others, and dehumanizing nature in besieged patriarchal societies in order to create the possibility of escape from the dystopian nightmare and environmental degradation in the perspective of ecofeminist theoretical framework. The article hypothesizes that the dystopian atmosphere assists women writers in creating a veritable image of the engendered attitudes and their impact on women, Others, and Nature. The study will be beneficial not merely for scholars and policymakers, but also for general readers, offering insights into intersections of environment, feminism, and power.
ЕФЕКТИВНІСТЬ АГРАРНОГО ВИРОБНИЦТВА НА МЕЛІОРОВАНИХ УГІДДЯХ ЗОНИ ПОЛІССЯ УКРАЇНИ В УМОВАХ ЗМІНИ КЛІМАТУ
Authors: Волк П. П. , Приходько Н. В.
Published: February 2025

У статті розглянуто питання зниження ефективності аграрного виробництва на меліорованих угіддях зони Полісся України в умовах зміни клімату. Здійснено огляд ключових тенденцій та наслідків зміни клімату в Україні, які безпосередньо впливають на умови та результати ведення аграрного виробництва, в тому числі і на меліорованих угіддях зони Полісся, які мають стратегічне значення як важливий ресурс для забезпечення й підтримання продовольчої та водної безпеки країни в умовах, що складаються. Результати аналізу багаторічних даних щодо вирощування основних сільськогосподарських культур на меліорованих угіддях зони Полісся України за період 1980–2018 рр. свідчать про наявність тенденції до зниження врожайності вирощуваних культур. Для визначення подальших перспектив виконано прогнозне оцінювання впливу змін клімату на продуктивність основних сільськогосподарських  культур стосовно ретроспективних результатів, яке показало загрозу можливого зниження врожайності в середньому  від 15 до 60% у разі дотримання наявних підходів і практик використання меліорованих угідь зони Полісся. У зв’язку з  цим, визначено перспективні заходи для розробки відповідних стратегій подальшого розвитку, у тому числі  впровадження адаптивних ресурсоощадних заходів, які передбачають необхідність зміни в сортах, введення сільськогосподарських культур, стійких до загроз (передусім щодо температурного і водного режимів), а насамперед  впровадження удосконалених на еколого-економічних засадах технологій і режимів водорегулювання на осушуваних  землях.
MYKHAILO BAIMURATOV’S DOCTRINE OF MUNICIPAL LAW
Authors:   V.M. Koretsky Institute of State and Law, Bаtanov Оleksandr V.
Published: February 2025

The article highlights the role of Doctor of Juridical Science, Professor Mykhailo Baimuratov, in
shaping the national doctrine of municipal law. It is argued that the nature of municipal law can be
most fully understood through the communal concept of local self-government, of which Mykhailo
Baimuratov is a consistent proponent. The article asserts that only through the communal approach to
legal understanding can axiological, gnoseological, ontological, civilizational, institutional, functional,
subject-object, constitutive, historical, categorical, ideological, economic, mental, and other aspects
of understanding municipal law as an independent branch of national law be revealed. The contribu- The contribu- The contribu-
tion of Mykhailo Baimuratov and the scientific school of municipal law he established is analyzed with
a focus on the problems of local self-government functioning within the framework of modern consti-
tutionalism in Ukraine, its role in the modernization of Ukrainian statehood, and the development of
civil society. It is demonstrated that modern municipal law as a branch of law is the product of the the- It is demonstrated that modern municipal law as a branch of law is the product of the the- It is demonstrated that modern municipal law as a branch of law is the product of the the-
ory of municipalism and centuries-old practice of local self-government. This branch has evolved un-
der the influence of principles and key ideas of democracy, the rule of law, and human rights. It rep-
resents a unique normative-legal model reflecting the state of local self-government development in
a particular country (national municipal law), a specific continent (e.g., European Municipal Law), or
globally (Global Municipal Law or International Municipal Law). The article emphasizes that conceptu- The article emphasizes that conceptu- The article emphasizes that conceptu-
al issues of the globalization of the local self-government doctrine and the formation of internation-
al municipal law have always been a significant subject of scholarly interest for Mykhailo Baimuratov.
The article also explores Mykhailo Baimuratov’s role in developing innovative scientific approaches
and methodologies for understanding such municipal-legal phenomena as municipal interests, munic-
ipal values, municipal legal consciousness, municipal culture, municipal psychology, and militarized
municipalism, among others.
A CITIZEN AND A TERRITORIAL COLLECTIVE UNDER MARTIAL LAW: INTERPRETATION OF ESSENCE AND INTERRELATION
Authors:   Odessa State University of Internal Affairs, Lvova Ielyzaveta O.
Published: February 2025

The article considers theoretical and legal approaches to the definition of the terms “citizenship”
and “territorial community” (“territorial collective”), as well as reflects their evolution on the basis of
generalization of the conceptual vision of Ukrainian legal scholars. Modern prerequisites and prospects
for the formation of national legislation in the field of local self-government are analyzed. The article
reflects an attempt to determine the interrelation between these terms in the context of the development
of the science of constitutional and municipal law in the context of the war in Ukraine. It is determined
that the legislation of Ukraine on local self-government is seen as an innovative human rights mechanism
under martial law in the context of restricting human and civil rights. The interrelation between the terms
“citizenship”, “territorial community” and “territorial collective” is close, but it contains both oppositional
and proponent characteristics. In general, the legal regulation of the implementation of interests of
territorial communities (territorial collectives) by themselves is still far from ideal and needs further
improvement.
FEATURES OF UKRAINE’S ENERGY TRANSFORMATION: LEGAL ASPECT
Authors:   V Ma- «V Ma- V Ma- mutov Institute of Economic and Legal Research of the National Academy of Sciences of Ukraine, Nikolenko Liudmyla M.
Published: February 2025

The article examines the peculiarities of the energy transformation of Ukraine in the modern period.
It is emphasized that the energy transformation of Ukraine is one of the main tasks on the way to sustain-
able development and integration into the European economic space. At the same time, Ukraine, a coun-
try rich in coal resources, is faced with the unique problem of balancing the transformation of coal regions,
maintaining the socio-economic needs of these regions, and restructuring the entire energy system in the
direction of RES in wartime, which is a unique experience for the whole world. It was noted that the basis
of the state policy regarding energy transformation should be the principles that will determine the trans-
formation vector. In addition to the general principles, namely: systematicity, adaptive flexibility, a combi-
nation of positive and negative methods of stimulation, making permanent and systemic decisions, trans-
parency, sustainable and sustainable development of cities and regions, the use of the best available tech-
nologies and practices, decarbonization, it is proposed to single out the principle of fair transformation and
the principle of polymorphism. A just transformation involves the coordination of economic, social, labor
and environmental policies, the implementation of measures aimed at ensuring social justice and well-be-
ing in the transition process. The principle of polymorphism is understood as a multifunctional vector of
transformation. Energy transformation should include not only the direct reorientation of the energy sys-
tem to new types of energy, integration with the energy systems of EU countries, decarbonization, optimi-
zation of the balancing of the entire energy system, directions for increasing energy efficiency, as well as
reforming legislation, changing the state’s approaches to management, control over energy use, formation
of a new system of state and communal bodies, etc. In the process of energy transformation, in order to
prevent and prevent the destruction or destruction of energy infrastructure during crisis events, increase
the possibility of restoring energy facilities, it is proposed to move away from the centralized energy sys-
tem and build municipal energy systems that will work independently of each other.
Jakob Kaiser
Authors: Řezanková Ivona
Published: February 2025

Werner Conze: ]akob Kaiser, Politiker zwischen Ost und West 1945-1949. W. Kohlhammer Verlag, Stuttgart-Berlin-Köln-Mainz 1985, 294 stran.
Kinetics of the filtration drying of match splints
Authors:   Lviv Polytechnic National University, Kuzminchuk T.A. , Atamanyuk V.M. ,   Lviv Polytechnic National University
Published: February 2025

For energy-efficient drying of match splints, it is necessary to ensure the minimum duration of the process, the efficiency of moisture extraction and the preservation of the quality of the material. The filtration drying method was chosen for the research. In this work, the influence of the following process parameters on the drying kinetics was determined: the height of the stationary layer of the material (150 mm, 200 mm, 250 mm, 300 mm, and 350 mm), the temperature of the heat agent (40, 50, 60, 70, and 800С) and the velocity of the heat agent through the layer of dispersed material (0.18, 0.21, 0.23, 0.26, and 0.29 m/s). Kinetics of the filtration drying of match splints was studied. Obtained dependences allowed determining the moisture content of the material in the process of drying match splints in periods of complete and partial saturation of the heat agent with moisture. The equation for determining the duration of drying in the first and second conditional periods was derived. Correlation dependence between experimental data and calculated values was given. The average relative error did not exceed 8.5%, which makes it possible to use the obtained dependences for design calculations of drying installations.
The influence of Cr2O3 on the temperature coefficient of linear expansion of glass in the oxide Na2O–B2O3–SiO2 system
Authors:   Ukrainian State University of Science and Technologies, Matsenko S. , Goleus V. ,   Ukrainian State University of Science and Technologies, Ryzhova O. ,   Ukrainian State University of Science and Technologies
Published: February 2025

In this study, the coefficients of linear temperature expansion (CLTE) of glasses were experimentally determined in the Na2O–B2O3–SiO2–Cr2O3 system with the following component contents (mol.%): 19.6–41.8 Na2O; 15.7–34.8 B2O3; 29.4–59.7 SiO2; and 0.5–2.0 Cr2O3. The CLTE (, К–1) of the investigated glasses in the temperature range of 20–4000C mainly depends on the content of Na2O, B2O3 and SiO2 oxides and can be quite accurately calculated by the following additive formula: , where [Na2O], [B2O3], [SiO2], and [Cr2O3] are the contents of respective oxides in the glass (mol.%). The accuracy of the calculations based on this formula is confirmed by a correlation coefficient of 0.995 between the calculated and experimental CLTE values of the studied glasses. Based on the additive coefficients, the degree of influence of the oxide components on the CLTE of the studied glasses was established in the following sequence: Na2O>Cr2O3>B2O3>SiO2. Despite the relatively high additive coefficient of Cr2O3, the partial influence of chromium (III) oxide on the CLTE of the studied glasses is small due to its relatively low content being within the range of 0.5–2.0 mol.%. The suggested calculation method can be uses in the development of new compositions of synthetic chrome aventurine glasses, crystalline ceramic glazes and enamel coatings.
Copper–nickel alloy as a potential electrocatalyst for oxygen evolution and urea oxidation reactions: effect of anodic treatment in deep eutectic solvents
Authors:   Ukrainian State University of Science and Technologies, Makhota D.O. , Protsenko V.S. ,   Ukrainian State University of Science and Technologies, Butyrina T.E. ,   Ukrainian State University of Science and Technologies, Danilov F.I. ,   Ukrainian State University of Science and Technologies
Published: February 2025

An experimental study was conducted to investigate the effects of anodic treatment of a copper–nickel alloy (~55 wt.% Cu) in deep eutectic solvents (DESі) on its electrocatalytic behavior in the oxygen evolution reaction and electrochemical urea oxidation reaction in an aqueous alkaline medium of 1 M NaOH. The chosen DES mixtures were eutectic mixtures of choline chloride with ethylene glycol and urea (ethaline and reline, respectively). Anodic treatment was performed in potentiostatic mode for 2.5 hours at potentials of 0.3, 0.5, 0.7, 1.0, 1.35, and 1.7 V relative to a silver quasi-reference electrode. Linear voltammetry revealed that anodic treatment of the copper–nickel alloy in either ethaline or reline at any of the applied potentials results in an increase in the polarization of oxygen evolution reaction. In the case of urea oxidation reaction, an increase in current density, indicating enhanced electrocatalytic activity, was observed at specific anodic treatment potentials. The specific nature of the surface treatment's effect on the Cu–Ni alloy in different DES and the non-monotonic influence of anodic treatment potential on electrocatalytic activity in both the oxygen evolution and electrochemical urea oxidation reactions in an alkaline medium were attributed to changes in surface morphology. These morphological changes lead to corresponding alterations in the nature, concentration, and activity of catalytic sites involved in the studied reactions. The results of this work may contribute to the development of processes for the electrolytic synthesis of green hydrogen via water electrolysis, where the oxygen evolution is replaced with urea oxidation reaction.
Synthesis and antioxidant activity of new 2-(2-oxoindoline-3-ylydene) substituted 5,6-dihydroimidazo[2,1-b]thiazolones and 6,7-dihydro-thiazolo[3,2-a]pyrimidinones
Authors:   Lesya Ukrainka Volyn National University, Slyvka N.Yu. , Saliyeva L.M. ,   Lesya Ukrainka Volyn National University, Zhylko V.I. ,   Lesya Ukrainka Volyn National University, Tkachuk V.M. ,   Institute of Organic Chemistry of National Academy of Sciences of Ukraine, Vovk M.V. ,   Institute of Organic Chemistry of National Academy of Sciences of Ukraine
Published: February 2025

The paper presents the results of the study on the interaction of 5,6-dihydroimidazo[2,1-b]thiazoles and 6,7-dihydrothiazolo[3,2-a]pyrimidines with isatin derivatives. It was established that the condensation of the indicated reagents occurs selectively upon heating and without the use of a catalyst with the formation of addition products, 2-(2-oxoindolin-3-ylidene)-5,6-dihydroimidazo[2,1-b]thiazole-3(2H)-ones 6a–d and 2-(2-oxoindolin-3-ylidene)-6,7-dihydro-2H-thiazolo[3,2-a]pyrimidin-3(5H)-ones 7a–c, the structure of which was rigorously proven by 1H NMR (13C) spectroscopy and chromatography-mass spectrometry. All newly synthesized compounds were tested for antioxidant activity. According to the conducted bioscreening, the compounds 2-(5-nitro-2-oxoindolin-3-ylidene)-5,6-dihydroimidazo[2,1-b]thiazol-3(2H)-one 6d (I=84.5%) and 2-(5-nitro-2-oxoindolin-3-ylidene)-6,7-dihydro-2H-thiazolo[3,2-a]pyrimidin-3(5H)-one 7c (I=79.1%) exhibit the highest antioxidant action. This proves that electron-acceptor substituents in the 5-position of the 2,3-dihydro-1H-indoledione fragment contribute to a significant increase in antioxidant activity.
Studying the Dynamic Process of Rat Ovary Through Histological Sections and Cell Culture
Authors:   Department of Histology and Embryology, Faculty of Medicine, Pamukkale University, Denizli, Turkey., Serkant Ünal Murat , Tabatabaei Seyedmahdi ,   Department of Histology and Embryology, Faculty of Medicine, Pamukkale University, Denizli, Turkey.
Published: February 2025

Background: Primordial follicles, which are the structural units of the ovary and represent the ovarian reserve, continue their development by entering into paracrine, endocrine, and cell-cell interactions with the structures and cells in the niche.
Objectives: To examine the development of cells and structures in the ovary in cell culture medium and histological sections and observe the effects of the niche they formed on folliculogenesis.
Methods: Three 3-week-old as the first group for cell culture, and three 8- to 10-week-old (early reproductive period) and three 12- to 14-month-old (late reproductive period) Wistar albino rats as the second and third groups for histologic sections were included in our study. To prepare histological sections, ovarian tissues of rats in the early and late breeding periods were excised and passed through routine histological tissue process steps. Additionally, ovarian surface epithelium proliferating together with ovarian stromal cells in explant cell culture was isolated and multiplied.
Results: Ovarian surface epithelium and stromal cells were observed to proliferate in cell culture. Primordial follicle-like structures were observed between the surface epithelial cells. Histological examination revealed periovary adipose tissue around the ovary, separated from the surface epithelium by a thin fibrous sheath. It was observed that primordial follicles were located in the tunica albuginea layer. The fibroblast-like mesenchyme in the tunica albuginea of the corpus luteum formed after ovulation thickens this layer by the proliferation of cells and creates a suitable environment for developing primordial follicles. Also, the tubules of the rete ovarii, which emerge during the formation of the genitourinary system in the embryological period, continue to exist in the ovaries and mesovarium in rats in the early and late reproductive period.
Conclusion: The presence of tubules of the rete ovarii in the ovary and mesovarium during the reproductive period may indicate that these structures are also important in folliculogenesis.
The effect of high- intensity interval training with silymarin extract on malondialdehyde and superoxide dismutase in heart and lung endothelial tissue of male rats exposed to diazinon
Authors:   Department of Physical Education, Mahallat Branch, Islamic Azad University, Mahallat, Iran, Hosinzadeh Amir , Abedi Bahram ,   Department of Physical Education, Mahallat Branch, Islamic Azad University, Mahallat, Iran, Moradi Lida ,   Department of Physical Education and Sports Sciences, North Tehran Branch, Salamic Azad University, Tehran,
Published: February 2025

Introduction and aim: Diazinon is an organophosphorus insecticide that causes oxidative stress. However, physical activity and consumption of antioxidants improve the antioxidant status of the body. The aim of the present study was to investigate the effect of high- intensity interval training with silymarin extract on MDA and SOD indices of heart and lung endothelial tissues in male rats exposed to diazinon.
Methods: In this experimental study, 36 male Sprague-Dawley rats with a weight range of 150 to 200 grams and an average age of 8 weeks were randomly assigned to 1) control (C), 2) sham (Sh) 3) diazinon. (D) 4) silymarin extract (SL), 5) high- intensity interval training (TH) and 6) high- intensity interval training with silymarin extract (TH+SL) were divided. During 8 weeks, rats in groups 3 to 6 received diazinon 1.5 mg/kg intraperitoneally five days a week. Groups 5 and 6 performed HIIT exercises five times a week, and groups 4 and 6 received 50 mg/kg silymarin extract intraperitoneally five days a week. high- intensity interval training with an intensity of 85% to 110% VO2max and a speed of 15-45 m/min was performed for 8 weeks. After 8 weeks, malondialdehyde (MDA) levels and superoxide dismutase (SOD) gene expression were measured in heart and lung endothelial tissues. To analyze the findings, Shapiro-Wilk test, one-way analysis of variance along with Tukey's post hoc test were used in SPSS version 22 software. Also, (P≤0.05) was considered as a significant level.
Findings: Diazinon had a significant effect on the increase of MDA and decrease of SOD in heart and lung endothelial tissues (P<0.05). However, HIIT exercise and consumption of silymarin each alone lead to a decrease in MDA levels and an increase in SOD in heart tissues. and lung endothelial of the poisoned mice (P<0.05). Meanwhile, both HIIT exercise interventions with silymarin had a greater effect on reducing MDA and increasing SOD in heart and lung endothelial tissues of rats exposed to diazinon (P<0.05).
Conclusion: It seems that regular HIIT exercises and consumption of silymarin each alone and the interaction of the two together can cause a decrease in oxidative indices and an increase in antioxidants in heart and lung endothelial tissues caused by diazinon poisoning.
Evaluation of the Prevalence and Severity of Tricuspid Regurgitation in Children Referred to The Echocardiography Department of Hazrat Masoumeh Hospital – Qom 2021
Authors: Alavi Seyed Mojtaba , Montazeri Seyed Mohammad Hashem , Amouzadeh Masoud Hassanvand , Arjmandnia Mohammad Hosein , Lajevardi Hamideh Sadat , Takmili Mahla
Published: February 2025

Introduction and aim: This study was conducted with the aim of evaluating the prevalence and severity of tricuspid regurgitation in children referred to the Echocardiography Department of Hazrat Masoumeh Hospital in Qom in 2021.
Methods: An observational study was conducted at Hazrat Masoumeh Pediatrics Clinic in Qom, Iran, involving 284 healthy children aged 1 day to 18 years old with no previous diseases. The study excluded patients with congenital disorders and those with symptoms of cardiac or pulmonary disease. The severity of tricuspid regurgitation was assessed using Transthoracic Echocardiography (TTE) based on recent guidelines. Data analysis was performed using SPSS 26.0 software, and statistical tests were used to compare the data. The study was approved by the Medical Ethics Committee of the Qom of Medical Sciences and obtained informed consent from all parents.
Results: Our study included 284 patients, with 164 boys and 120 girls (57.7% Vs. 42.3%). The youngest participant was 2 days old and the oldest was 18 years old, with a mean age of 4.07±4.02 years. Most children (90.2%) had mild to moderate signs of TR, while 8.8% had no signs. Overall, 82.3% of boys and 80% of girls had TR, with no significant association between TR severity and sex. There was also no significant difference in TR severity among different age groups (P-value>0.05).
Conclusion: The study found that over 90% of healthy children have some degree of tricuspid regurgitation (TR). The presence of mild TR should not be considered pathological, as it does not worsen with age and does not require further follow-up or investigation. Furthermore, over 80% of adults have been reported to have mild TR.