bluuebunny/crossref_metadata_2025 huggingface dataset:
THE STATE OF ACCOUNTING SYSTEM AND DISCLOSURE OF INFORMATION ON PROPERTY, PLANT AND EQUIPMENT IN THE FINANCIAL STATEMENTS OF PUBLIC INTEREST ENTITIES
Authors:   State Tax University, Shatskov Viktor
Published: October 2024

The accounting system for property, plant, and equipment adopted by an enterprise must effectively capture how the organization derives economic benefits from its assets. Given that accounting for property, plant, and equipment is a critical aspect of a public interest entity’s assets, it is characterized by a considerable degree of variability, and existing recommendations for accounting and disclosure according to international standards are often insufficient. Public interest entities are required by these standards to disclose information regarding key accounting estimates in their financial statements and may also provide any additional information that management believes would help users gain a more comprehensive understanding of property, plant, and equipment. Consequently, to enhance stakeholder trust, it is essential not only to justify and disclose key accounting estimates more thoroughly but also to present data on property, plant, and equipment that reflects management objectives and the organizational, technological, and economic characteristics unique to public interest entities. The aim of this article is to examine the current state of the accounting system and the disclosure of information related to property, plant, and equipment in the financial statements of public interest entities. The article explores selected accounting models for property, plant, and equipment and examines various grouping approaches for these assets. It also analyzes the depreciation policies and compares useful life terms with the tax code of Ukraine. Additionally, the article investigates the determination of the interest rate for future lease payments associated with right-of-use assets in lease agreements. Furthermore, it assesses the state of disclosures in financial statements regarding detailed information such as unfinished capital investments, prepayments for property, plant, and equipment, the cost of fully depreciated property, plant, and equipment still in use, the carrying amount of pledged property, plant, and equipment, profits or losses from the sale of property, plant, and equipment, losses from the write-off of property, plant, and equipment, and any revaluation surplus or deficit related to property, plant, and equipment.
ПОТЕНЦІОМЕТРИЧНИЙ СЕНСОР ДЛЯ ВИЗНАЧЕННЯ ФЕНОПРОФЕНУ
Authors: КОРМОШ Жолт , ЮРЧЕНКО Оксана , КОРОЛЬЧУК Світлана , САВЧУК Тетяна , ГОРБАТЮК Наталія , БОХАН Юлія , БОРКОВА Світлана , ЛЮШУК Катерина , ПІСКАЧ Людмила
Published: October 2024

Розвиток прикладної потенціометрії вимагає як теоретичних досліджень, вкладених у з’ясування природи селективності електродних мембран, і пошуку нових способів синтезу мембран та його модифікації з метою отримання досконаліших структурних одиниць із ширшим діапазоном функціональні властивості цих матеріалів. Для вирішення цієї проблеми важливу роль відіграє встановлення зв’язку між структурними характеристиками мембран та їх впливом на електроаналітичні властивості. Взаємодія органічного аніону фенопрофену (Фен-) з толуїдиновим синім (ТС+) було досліджено Методом математичного моделювання обґрунтовано енергоефективність формування ІА. Молекулярне моделювання систем Фен- + ТС+ та пов’язані з ним розрахунки проводили з використанням пакета «HyperChem 8.0» для різноманітних початкових варіантів розташування протиіонів відносно один одного (процедура «single point»). Геометричну оптимізацію іонів проводили методом молекулярної механіки MM+. Розроблено фенопрофен-селективний сенсор із пластифікованою полівінілхлоридною мембраною. Електрод містить іонний асоціат фенопрофену з толуїдіновим синім. Для моделювання складу мембрани як матрицю використовували ПВХ; досліджено мембрани, пластифіковані дибутілфталатом (ДБФ), діетилфталатом (ДЕФ), діоктилфталатом (ДОФ), динонілфталатом (ДНФ), дибутилсебацинатом (ДБС), трикрезилфосфат (ТКФ). Встановлено, що природа пластифікатора дещо впливає на крутизну і до певної міри на межу виявлення сенсорів. Відгук лінійний у межах зміни концентрації іонів фенопрофену 8·10–5 – 1·10–1 моль/л із крутизною електродної функції 40,0 ± 1,0 мВ/рС. Сенсор має короткий час відклику 5-10 с і може використовуватися не менше 10 тижнів. Сенсори з більшим вмістом пластифікатора працюють довше, ніж з меншим вмістом. Електрод можна використовувати у діапазоні pH 6,5-12,0. Були досліджені коефіцієнти селективності для фенопрофену по відношенню до іонів, що потенційно можуть заважати. Для оцінки розроблених сенсорів було проведено їх апробацію щодо визначення фенопрофену в різних об’єктах методом потенціометрії.
Sistem Aplikasi Mobile Usaha Gabungan Terpadu (UGT) Nusantara Dalam Meningkatkan Literasi Keuangan Syariah Digital Masyarakat
Authors: Oktavia Novi Tri
Published: October 2024

Tujuan dalam penelitian ini adalah meningkatkan literasi keuangan syariah digital masyarakat Indonesia khususnya pada umat muslim. Dalam pengupayaan tersebut, PT Bank Syariah Indonesia Tbk, melakukan kolaborasi bersama koperasi simpan pinjam syariah terbesar di Indonesia yaitu Koperasi Simpan Pinjam dan Pembiayaan Syariah (KSPPS) BMTUGT Nusantara untuk memperluas pemanfaatan layanan jasa dan produk perbankan syariah. Penelitian ini menggunakan pendekatan kualitatif dengan jenis penelitian studi kasus. Hasil penelitian menunjukkan bahwa Inovasi fintech yang diciptakan oleh BMT UGT Nusantara adalah Mobile UGT dengan total jumlah pengguna aplikasi yang sudah mencapai 40.595 anggota. Melalui mobile UGT masyarakat dapat mengetahui informasi saldo rekening, mutasi pada rekening, MDA berjangka, pembiayaan dan simpanan (wajib, pokok, siwak, dan khusus). Selain itu, mobile UGT juga dapat digunakan untuk melakukan transfer antar mobile UGT, transfer ke Bank syariah/konvensional, dan transfer ke e-maal; donasi ke LAZ Sidogiri dan L-Kaf Sidogiri; pembayaran BPJS, listrik pascabayar, PDAM, wifi, dan TV berlangganan; pembelian pulsa prabayar, paket data, dan token listrik; multi finance; dan top up e-wallet. Hadirnya mobile UGT sangat memberikan manfaat bagi seluruh anggota BMT UGT NUSANTARA dalam melakukan transaksi keuangan.
Addressing Regulatory Risks in Fintech through Decentralized Technologies
Authors: Fahrudin Rifqi , Dwi Yulian Firdaus , Yadi Fauzi Ahmad , Wilson Ashley , Kuusk Taavi
Published: October 2024

The fintech industry, characterized by rapid innovation and disruption of traditional financial services, faces significant regulatory challenges that can hinder its growth and sustainability. Managing these regulatory risks is crucial to ensuring compliance and maintaining trust within the industry. Decentralized technologies, particularly blockchain, have emerged as potential solutions for enhancing regulatory compliance through increased transparency, security, and automation. This study aims to analyze the role of decentralized technologies in addressing regulatory risks in the fintech sector. Utilizing the SmartPLS method for data analysis, the research examines the relationships between decentralized technology adoption, compliance automation, and regulatory risk mitigation. The findings reveal that decentralized technologies significantly reduce regulatory risks by automating compliance processes and enhancing transparency. These insights offer valuable implications for fintech companies and regulators, suggesting that the integration of decentralized technologies can be a strategic approach to managing regulatory challenges in the industry.
Pengaruh Burnout terhadap Work Engagement Karyawan melalui Perceived Organizational Support sebagai Variabel Mediasi
Authors: Marcelina Savira Alviolita , Archianti Puti
Published: October 2024

This research aims to test the effect of burnout on work engagement with perceived organizational support as a mediating variable. This research uses a quantitative approach with a mediation test model, with a sample size of 230 employees of PT. X in Purwakarta Regency selected through purposive sampling. Burnout is measured using the MBI (Maslach Burnout Inventory) scale, work engagement is measured using the UWES-9 (Utrecht Work Engagement Scale), while the tool for measuring perceived organizational support uses the SPOS-8 (Survey of Perceived Organizational Support) scale. The results show that perceived organizational support is able to partially mediate. Based on the results obtained, it was concluded that there was an influence of burnout on employee work engagement with perceived organizational support as a mediating variable.
Pengaruh Pertimbangan Pasar Kerja, Kecerdasan Adversitas, Efikasi Diri, dan Nilai Sosial terhadap Minat Menjadi Akuntan Publik
Authors: Ramadhani Mutiara Diva , Mimba Ni Putu Sri Harta
Published: October 2024

The study aims to identify the influence of job market considerations, adversity intelligence, self-efficacy, and social values ​​on interest in becoming a public accountant. The research population was 226 accredited undergraduate accounting students at state universities in Bali, class of 2020. Data was collected through a survey using probability sampling and simple random sampling techniques with a partial least square-based structural equation modeling (SEM-PLS) approach. The results show the job market considerations, adversity intelligence, self-efficacy, and social values ​​have a significant positive effect on interest in becoming a public accountant. The higher the independent variables, the interest in becoming a public accountant will increase.
Dampak TPT, IPM dan Jumlah Penduduk terhadap Melebarnya Ketimpangan Pendapatan antar Daerah di Jawa Timur
Authors: Ariasta Muara Ati Asri , Setiawati Ririt Iriani Sri
Published: October 2024

The study was conducted to determine the influence of the open unemployment rate (TPT), human development index (HDI), and population on income inequality between districts/cities in East Java in 2018-2023. This study uses secondary data by combining cross-section and time series data. This data was taken from the official website of the BPS (Central Statistics Agency) of East Java Province, and then analyzed using panel data regression techniques by carrying out the t-test, f-test and coefficient of determination. The results show that the open unemployment rate does not effect on income inequality, while the human development index and population have a positive and significant effect on income inequality. Based on the results of this research, it is hoped that the government can carry out equitable economic development in each region and the community is expected to play an active role in the economic development process.
Integrating Perceived University Support and Theory of Planned Behavior in Determining Entrepreneurship Intention among Student
Authors: Siregar Jonathan Lampatar , Siregar Veronika Angel , Rahmiati Filda , Daniela Lerissa , Ramananda Dimaz
Published: October 2024

Based on the Theory of Planned Behavior, this study investigates how perceived university support influences entrepreneurship intention through the mediating variables of attitude, subjective norms, and perceived behavioral control. Using a quantitative approach with 188 Generation Z student respondents from Jakarta, data was collected via online questionnaires and analyzed with SEM using SmartPLS 4. The results show that perceived university support significantly affects attitude toward behavior, subjective norms, and perceived behavior control. However, its impact on entrepreneurship intention is only significant when mediated by attitude and perceived behavioral control, while subjective norms show no significant indirect effect.
Polskie elementarze (podręczniki do nauki czytania ) z XVI i początku XVII w.
Authors: Siess-Krzyszkowski Stanisław
Published: October 2024

Od XVI do XVIII, a w szkółkach parafialnych i wiejskich do XIX w. uczono czytania znaną od starożytności metodą sylabizowania zwaną też metodą alfabetyczną. Istotną część wszystkich podręczników stanowiły nauki katechizmowe – stąd ich jednoznaczny charakter konfesyjny. Dwa najstarsze znane polskie podręczniki do nauki czytania były przeznaczone dla wyznawców konfesji augsburskiej. Jednak jest bardzo prawdopodobne, że pierwsze polskie elementarze, zawierające nauki katechizmowe zgodne z doktryną katolicką, zaczęto drukować w latach 20. XVI w. W artykule omówiono wszystkie znane obecnie edycje podręczników do nauki czytania pisma polskiego wydane w XVI i XVII w.
"He was a European, an educated man". Foreign contacts of Professor Adam Schaff (1913-2006) based on provenance analysis of selected copies from his book collection
Authors: Jarzyńska Katarzyna
Published: October 2024

The article presents the results of the research conducted on the topic “The private book collection of Professor Adam Schaff in the collections of the Joint Libraries of the Faculties of Philosophy and Sociology of the University of Warsaw, Institute of Philosophy and Sociology of the Polish Academy of Sciences, and the Polish Philosophical Society”[1]. Professor Adam Schaff (1913–2006) gathered an extensive book collection during his many years of academic work, falling during the Polish People’s Republic period. After his death, it was transferred to the Joint Libraries of WFiS UW, IFiS PAN, and PTF[2]. A. Schaff maintained contact with many foreign scholars specializing in philosophy and sociology, which directly influenced the analyzed collection. The article contains a qualitative, quantitative, and provenance analysis of this book collection. Provenance and bibliographic methods were used to study the characteristics of selected copies, making it possible to reconstruct Schaff’s contacts with the foreign scientific community.
 
[1] Master’s thesis, supervisor: Prof. Jacek Puchalski, University of Warsaw, 2023.
 
[2] Joint Libraries of the Faculties of Philosophy and Sociology of the University of Warsaw, the Institute of Philosophy and Sociology of the Polish Academy of Sciences, and the Polish Philosophical Society (PB WFiS UW, IFiS PAN, and PTF) is the proper name of the institution established in the 1950s, which consisted of 3 combined libraries, with joint staff and premises, but separate assets and thematically complementary book collections in philosophy and sociology.
About the Fine Structure Constant
Authors:   France, Raverdy Yvan-Claude
Published: October 2024

This study builds on a previous publication entitled “a formula for electron mass calculation based on new fundamental concepts (ref.1), it shows that the relationship obtained between the mass of the electron and the four fundamental constants of physics, including fine structure constant, is precisely satisfied (to the millionth) if we take the inverse of the latter equal to the whole number 137. This value is interpreted as “ideal” for a Vacuum which would be free from radiation and other particles, therefore consisting exclusively of dark energy, this would imply a slight modification of the speed of light and Planck's constant, in this medium.
أثر برنامج تعليمي وفقاً لاستراتيجية خرائط المفاهيم في التحصيل المعرفي واكتساب بعض المهارات الاساسية بكرة القدم للصالات
Authors: Asst. Lec. Hadeel Yahya Muhammad
Published: October 2024

تهدف الدراسة الى اثر استراتيجية خرائط المفاهيم في التحصيل المعرفي وتعلم بعض المهارات الاساسية بكرة القدم للصالات وكذلك اكتساب بعض المهارات الاساسية بكرة القدم للصالات , حيث تكونت العينة من (36) طالبا تم اختيارهم بطريقة عشوائية , من طلاب كلية التربية الرياضية – جامعة ديالى المرحلة الثالثة و للعام الدراسي 2023-2024 , وتم تقسيم العينة الى مجموعتين المجموعة الاولى مجموعة تجريبية والتي تدرس بطريقة خرائط المفاهيم والاخرى المجموعة الضابطة بالأسلوب المتبع , وتم تحديد استمارة لقياس الاداء المهارى للطلاب لمجموعتي البحث وتحديد درجاتهم , وايضا تم تحديد المادة الدراسية لمجموعتي البحث بعد الاطلاع على المنهاج الدراسي ولغرض قياس التحصيل المعرفي تم بناء اختبار تحصيلي للطلاب بالمادة الدراسية من قبل الباحثة للمهارات الاساسية بكرة القدم للصالات من خلال اعداد جدول مواصفات لمحتوى المادة حسب مستويات هرم بلوم للتحصيل المعرف الثلاثة الاولى (تذكر، فهم ، تطبيق) وتحديد الاهمية النسبية للمادة الدراسية و حيث استخدمت الباحثة الاختبار التحصيلي والوحدات التعليمة بطرقة خرائط المفاهيم وبعد الحصول على بيانات نتائج الاختبارات تم معالجتها احصائيا وتوصلت الباحثة الى , وجود فروق ذات دلالة احصائية عند مستوى (0.05) بين متسوط درجات المجموعة التجريبية والمجموعة الضابطة في التحصيل المعرفي واكتساب بعض المهارات الاساسية بكرة القدم للصالات ولصالح المجموعة التجريبية التي درست على وفق استراتيجية خرائط المفاهيم .
The problems of transition to RSCI database as the basic apparatus for scientometric research
Authors: Glushanovsky A. V.
Published: October 2024

The author examines the place of scientometrics in the general analysis of Russian flow of scientific publications (and changes in the attitude toward this issue in Russia in the recent years). He focuses, in particular, on the information and software tools for scientometric research (scientometric databases – OBD). The problems preventing today from using Web of Science and Scopus DBs are noted. The author argues that the RSCI database (Russian Science Citation Index) is currently the most appropriate choice. The existing RSCI OBD functionality, its advantages and disadvantages, and experience are discussed. The author concludes on the possibility and expediency of the wider use of the RSCI OBD in Russian scientometrics (within the current situation), however, he argues that some further developments are urgently needed, in particular, in the aspect of specialized scientometrics-oriented tools. The RAS BEN experience in design and application of such tools is highlighted.
Vertaisryhmätyönohjaus vahvistaa varhaiskasvatuksen opettajien osaamista ja hyvinvointia
Authors: Kaisa Pelanteri Kaisa Pelanteri , Ollila Seija
Published: October 2024

Työnohjauksen ja vertaisryhmätoiminnan yhdistävä vertaistyöryhmäohjaus tukee varhaiskasvatuksen opettajia kokonaisvaltaisesti työssään. Menetelmää hyödyntämällä kirkastetaan opettajan perustehtävää sekä vahvistetaan osaamista, työhyvinvointia, johtajuutta ja ammatti-identiteettiä varhaiskasvatuksessa.
THE MEDIATING EFFECT OF FINANCIAL INCLUSION ON CASHLESS PAYMENT AND SMEs SUSTAINABILITY
Authors:   Universitas Pattimura, Gainau Paskanova Christi , Leatemia Senda Yunita ,   Universitas Pattimura
Published: October 2024

Research Purposes. This study aims to investigate the influence of cashless payment on micro, small, and medium enterprises sustainability. Research Methods. The sample used is a non-probability sample of 100 business actors in Ambon City with data analysis techniques, namely Structural Equation Modeling (SEM) through SmartPLS4 software to analyze the relationship between variables. Research Results and Findings. The findings show that cashless payment does not possess any direct correlation with MSMEs sustainability in Ambon. Furthermore, positive and significant correlation from cashless payment to MSMEs sustainability can be established through the mediatory of financial inclusion among the business owners. The result of this study generates enticing implications towards MSMEs which is SMES needs to have wide access to service and product of financial. It will promote improvement of SMES sustainability.
‘Sick Hands, Thin and White, Were Always Slipping Offerings across My Windowsill, Offerings for the Little Birdlings’: Multispecies Encounters within and around Modern Rural British Sanatoria
Authors: Hickman Clare
Published: October 2024

The use of ‘open-air’ as a therapeutic agent in sanatoria, hospitals, and schools in the late nineteenth and early twentieth centuries led to the development of specific material features associated with modern design. By taking a sensory history approach which intersects with architectural and medical history methodologies, this article will use patient memoirs and oral histories of British experiences to explore multispecies encounters, particularly with birds, both within and around these clinical institutions. Medical concepts which prioritised the importance of fresh air and sunshine for prevention as well as therapeutic purposes led to architectural and design interventions for rural hospital buildings that encouraged windows and doors to be kept open at all times, as well as the construction of balconies and terraces onto which patients could be wheeled. This lack of firm architectural boundaries caused tensions for medical staff as it led to potentially unwanted ‘germ-laden’ species, such as birds and mice, to cross the institutional threshold into the clinical ‘germ-free’ interior. In turn, and often in contradiction to the concerns of medical staff, these multispecies interactions were sometimes able to co-produce a valuable sensory experience for patients, perhaps occasionally mitigating the difficulties and challenges of the modern, clinical setting.
Effects of different blade loading strategies applied to Low specific speed tube-axial fans
Authors:   University of Padova, Department of Management and Engineering - DTG, Masi Massimo , Danieli Piero ,   University of Padova, Department of Management and Engineering - DTG, Cin Enrico Dal ,   University of Padova, Department of Industrial Engineering - DII, Bregolin Edoardo ,   University of Padova, Department of Industrial Engineering - DII
Published: October 2024

Current industrial fans belonging to the tube-axial type offer the best performance for specific speeds higher than 6. For specific speed higher than 7.5, it is widely demonstrated that the performance requirements and efficiency of fans designed using the free-vortex blade load distribution can be matched, when not exceeded, by using other blade load distributions, also with advantage in terms of fan size reduction. On the other hand, the large number of free-vortex designs populating the vane-axial industrial fan type, suggests that the advantage associated with blade load distributions other than free-vortex reduces as specific speed decreases and vanishes at specific speeds lower than 6. This work presents and compares three fan designs conceived by the authors for specific speed approximately equal to 4.3. The fans feature hubto- tip ratio equal to 0.5 and differ to each other only in the blade load distribution that varies from free-vortex to rigidbody, passing through the constant-swirl one. The aims of the work are to quantify the pros and cons associated with the considered blade loading distributions, to identify the blade loading concept best suited to the range of specific speeds where hub-to-tip ratios equal to 0.5 are recommended for tube-axial fans and, to assess the capability of the design method originally suggested by the authors for fans with low hub-to-tip ratio. For this purpose, CFD-RANS analyses were carried out to preliminarily characterise all three proposed designs and identify the most efficient one. The most promising solution was manufactured by rapid prototyping, in the 315mm diameter size, and tested according to ISO 5801. The results demonstrate that the constant-swirl blade loading distribution offers good performance even at specific speeds close to the lower extreme of the usual tube-axial industrial fans application range and can be successfully designed using the improved version of the authors’ method presented here.
Numerical simulation of a highly bent intake duct using Machine learning algorithms to close the rans equations
Authors:   Institute of Jet Propulsion University of the Bundeswehr Munich, Hein Markus Carlos , Reissmann Maximilian ,   Department of Mechanical Engineering University of Melbourne, Scheibel Julian A. ,   Institute of Jet Propulsion University of the Bundeswehr Munich, Stößel Marcel ,   Institute of Jet Propulsion University of the Bundeswehr Munich, Sandberg Richard D. ,   Department of Mechanical Engineering University of Melbourne, Kožulović Dragan ,   Institute of Jet Propulsion University of the Bundeswehr Munich
Published: October 2024

This study intends to improve the numerical flow prediction of highly bent intake ducts by the specific use of machinelearning algorithms for the closure of the Reynolds-Averaged-Navier-Stokes (RANS) equations. A computational fluid dynamics (CFD)-driven machine learning approach utilizing an adapted Gene Expression Programming (GEP) algorithm is applied to approximate and iteratively improve an additional anisotropy stress tensor for the definition of Reynolds stresses. The determined turbulence model candidates are evaluated based on experimentally obtained data of the double s-shaped Military Engine Intake Research Duct (MEIRD). The newly generated non-linear stress models deliver a very promising improvement of the agreement with experimental data of MEIRD. This applies especially to the prediction of a large-scale flow separation and the corresponding position of the reattachment zone, which is significantly improved compared to the baseline k-ω SST model, closely matching the experimentally obtained data. Applying the model to non-trained operating points is shown to achieve similar improvements. Conclusively, the performance of the model is discussed in terms of remaining weaknesses and suggestions for further developments are presented.
Structural Design and Optimization of High-Speed Radial Compressor Wheels for Light Gases
Authors:   Institute of Power Plant Technology, Steam and Gas Turbines, RWTH Aachen University, Schwarz Marvin A. , Wirsum Manfred ,   Institute of Power Plant Technology, Steam and Gas Turbines, RWTH Aachen University
Published: October 2024

The use of radial compressors for the compression of hydrogen introduces notable challenges due to its unique characteristics. One significant challenge is the requirement for the circumferential speed at the rotor outlet to approach the sonic speed for achieving high compression efficiency. Furthermore, hydrogen can adversely affect the physical properties of many metallic materials. The circumferential speed is inherently constrained by the material properties of the impeller and rotor dynamics, with the density-to-tensile strength ratio playing a critical role in material selection. Moreover, rotor dynamics are influenced by factors such as the impeller’s weight and the center of gravity’s position. A promising approach to improve both without altering the impeller’s flow-path, is the modification of the internal topology. Additive manufacturing technologies emerge as the ideal choice for producing partially hollow impellers without changing the external shape of the impeller. However, many high-strength and hydrogen-resistant materials may not be suitable for state-of-the-art additive manufacturing. This paper presents a comprehensive design and optimization process for light gas centrifugal compressor impellers. The design process incorporates computer aided topology optimization considering material properties as well as rotor dynamic boundary conditions to attain maximum circumferential speed. The most common topology optimization algorithms are evaluated, and the density-based approach is identified as the most suitable algorithm. The presented design process is applied to a state-of-the-art high-speed impeller design, resulting in a reduction in mass by 27% and a reduction in maximum stress by 30-40%. The optimized topology features multiple cavities within the impeller and a strongly modified backside contour. The finite element analysis of the optimized impeller indicates a more uniform stress distribution in the highly stressed hub area in comparison to the benchmark geometry.
Crosswind aerodynamics of low pressure ratio fans
Authors:   Whittle Laboratory, University of Cambridge, Pardo Alejandro Castillo , Gunn Ewan J. ,   Turbostream ltd, Williams Tim S. ,   Whittle Laboratory, University of Cambridge, Hall Cesare A. Hall ,   Whittle Laboratory, University of Cambridge, Brandvik Tobias ,   Turbostream ltd, Baralon Stéphane ,   Rolls-Royce plc
Published: October 2024

Ultra-high bypass ratio (UHBPR) turbofans offer significant reductions in fuel burn and pollutant emissions due to their higher propulsive efficiency. To minimise drag and weight penalties with larger fan diameters, shorter and slimmer intakes are used. Compact intakes pose a risk of delivering highly distorted flow into the fan when operating at high power in strong crosswind. The fan-distortion interaction can degrade the thrust delivered by the engine, jeopardise the stable operability and threaten the mechanical integrity of the fan. This paper aims to understand the impact of crosswind direction on the aerodynamics of a low pressure ratio fan with both a conventional and a short intake. A fully coupled numerical model of the fan, intake and external flow-field is used to quantify how crosswind direction and intake length impact the loss generation and work through the fan. For crosswind from the left (looking into the engine) the ground vortex is co-rotating relative to the fan direction. This causes co-swirl at the fan tip at entry to the windward lip separation leading to reduced incidence and fan work. In contrast, crosswind from the right causes counter-swirl towards the fan tip as it leaves the separated region, leading to higher work and large corner separations extending down the span. A shorter intake length has a more closely coupled fan and intake lip, which tends to suppress the extent of the windward lip separation, but increases the swirl variations at the casing. This leads to reduced rotor losses for crosswind from the right but increased loss for crosswind from the left. Overall, for a short intake, the fan work is found to be around 6% higher for crosswind from the right relative to crosswind from the left. Despite the large levels of distortion in extreme crosswind, the prototype fan demonstrates in all cases it can operate stably without a significant drop in performance.
Normal behaviour modeling of hawt fleets using scada-based feature engineering
Authors:   University of Rome La Sapienza, Barnabei Valerio F. , De Girolamo Filippo ,   University of Rome La Sapienza, Ancora Tullio C. M. ,   University of Rome La Sapienza, Tieghi Lorenzo ,   University of Rome La Sapienza, Delibra Giovanni ,   University of Rome La Sapienza, Corsini Alessandro ,   University of Rome La Sapienza
Published: October 2024

Wind turbine O&M presents a challenge for large wind turbine fleets, where many turbines are scattered across different wind farms, exposed to non-homogeneous environmental conditions and varied operational histories. In this scenario, operators can leverage big data to address this challenge, with the objective of deriving O&M strategies common to subsets or communities of turbines, either to monitor their behavior collectively or to schedule custom maintenance. In this paper, we introduce an unsupervised data-driven framework to isolate communities of wind turbines based on their actual operational histories, as a precursor to asset-specific O&M strategies. The approach is based on a novel Meta Predictive Power Score (MPPS) to derive a behavior model for horizontal axis wind turbine fleets. The proposed framework relies on feature derivation, feature combination, and community detection algorithms. The feature derivation component involves the use of a multivariate feature selection algorithm based on the Combined Predictive Power Score (CPPS), in which a regression task quantifies the information content of combinations of variables for the prediction of one or more target parameters. A feature combination procedure defines the core of MPPS, where in a combination of CPPS scores and selected features for different regression tasks on diverse versions of the same turbine SCADA data results in a similarity matrix for the entire fleet. A community detection algorithm, based on Complex Network Analysis, is then used to identify groups of wind turbines within a fleet that exhibit similar behavior. The dataset used comprises 67 wind turbines, including diverse OEMs. The proposed algorithm employs a decision tree regressor considering lagged time series to compute the MPPS. The results demonstrate the flexibility of the multi-input multi-output formulation. The target of the regression tasks required to build the scores is a hypersurface that can describe the operational state of a wind turbine, defined by active power, blade pitch angle, and rotational speed.
Dynamics of elevated dodecane jets in crossflow at supercritical pressures
Authors:   Tsinghua University, Ding Siyu , Li Jiabin ,   Tsinghua University, Wang Xingjian ,   Tsinghua University
Published: October 2024

In advanced aero-engines, kerosene is often injected into combustor at supercritical pressures, where the shorter jet penetration depth may result in poor mixing and the resultant reaction spots near the combustor wall can cause erosion. Elevating the jet nozzle is proposed to remedy these issues. The flow dynamics of elevated dodecane jets in oxygen crossflow (EJICF) at supercritical pressures are numerically investigated using large eddy simulation. The effects of ambient pressure and elevation stack thickness and height on EJICF are studied. Results reveal that at low supercritical pressure, notable real-fluid effects arise due to density stratification in the jet's upstream shear layer, thereby delaying the shift of the flow from transitional regime to jet-dominated regime. Increasing stack thickness mitigates the impact of jet upshear effects and has the potential to eliminate lock-in phenomena between jet wake and stack wake. Decreasing stack height may lead to the diminishment of stack-wake Karman vortex shedding. In contrast to conventional JICF, the EJICF configuration exhibits a heightened tendency for recirculation bubble formation in the jet wake region. A spatial mixing analysis demonstrates the capacity of elevated stacks in enhancing the mixing efficiency of transverse jets.
Aerodynamic Behavior of a Transonic Compressor Under VIGV-Induced Swirl Distortion
Authors:   Technical University of Darmstadt Institute of Gas Turbines and Aerospace Propulsion, Karl Maximilian , Werner Jan ,   Technical University of Darmstadt Institute of Gas Turbines and Aerospace Propulsion, Mütschard Silas ,   Technical University of Darmstadt Institute of Gas Turbines and Aerospace Propulsion, Schiffer Heinz-Peter ,   Technical University of Darmstadt Institute of Gas Turbines and Aerospace Propulsion, Robens Sebastian ,   Siemens Energy AG
Published: October 2024

In this paper, the effects of swirl distortion on a 1.5-stage transonic axial compressor are investigated. The experiments were carried out at the transonic compressor test rig (TCD2) at Technical University of Darmstadt. The rig is representative of a modern gas turbine front stage. It was modified to allow individual stagger angle settings for all variable inlet guide vanes (VIGV). An extensive set of circumferentially traversable instrumentation enables the acquisition of two-dimensional 360°-flow field data. A comprehensive measurement campaign was carried out for various asymmetric VIGV patterns. Their global influence on aerodynamics and operating range as well as the local evolution of the distorted flow through the stage are presented in this paper. The results show a linear reduction in the stability margin of the stage when increasing the size or magnitude of the asymmetric area. Locally, the compressor exceeds the undistorted aerodynamic stability limit. A development from swirl distortions to total pressure and temperature distortions in the axial direction is observed. While the compressor behavior generally follows the assumptions of a parallel compressor model adapted for swirl distortions, novel experimental findings can be derived regarding the respective stability limit.
HUBUNGAN PENGETAHUAN DIABETES MELITUS DAN PENGETAHUAN ASUPAN GIZI PADA REMAJA DI SMK X SIDOARJO
Authors: Aristia Bella Fevi , P Aulia Rachma , Intan Firda , K Yunita Dyah
Published: October 2024

The prevalence of diabetes mellitus (DM) in the world and nationally continues to increase. DM generally occurs in the age group >50 years; however, DM currently affects many young age groups. Adolescents affected by DM can continue to increase if they do not have good knowledge about DM and nutritional intake. This study aims to determine the level of DM knowledge and nutritional intake among high school adolescents in SMK X West Sidoarjo. This research method is descriptive-observational with prospective data collection. The research instrument used the DKQ-24 questionnaire and a valid nutritional intake questionnaire. The selected sample is in accordance with the research inclusion criteria, totaling 50 people The results showed that 76% did not know the causes of DM and diet rules; 78% people also did not know the importance of DM treatment to control blood sugar. Regarding knowledge of nutritional intake, most respondents (56%) did not know the calculation and value of BMI, 46% did not know the importance of fiber for controlling blood sugar, and 40% did not know the types of foods with a high glycemic index. The majority of respondents have good knowledge about diabetes (76%) and nutritional intake (70%). Chi-square analysis shows that there is a relationship between knowledge of DM and knowledge of nutritional intake, with a p value of 0.027. DM knowledge and nutritional intake are important to shape healthy lifestyle behaviors in an effort to prevent DM in adolescents
Influence of Learning Commitment and Parental Involvement on Self-regulated Learning of Senior High School Students
Authors: Calumno Freddie John , Maria Rebecca R. Marfil
Published: October 2024

This study investigated the influence of learning commitment and parental involvement on the self-regulated learning of senior high school students of Biñan Integrated National High School, SY 2021-2022. A descriptive correlational research design sought to establish findings to be used as a foundation for a self-regulated learning model that can be adopted in the advent of face-to-face learning in the new normal. The findings indicated that the students indicated a strong learning commitment, a high level of parental involvement, and a high level of self-regulated learning. As significant relationships between variables were regressed, the resulting model revealed that learning commitment, as an individual predictor, has the most substantial positive influence on all dimensions of self-regulated learning. The combined effect of parental involvement negated the influence of learning commitment on dimensions of self-regulated learning in terms of environment structuring, task strategies and help-seeking strategies. Coordinating time and vitality through self-regulated learning will result in a more compelling and fulfilling encounter, which may boost self-efficacy and inspiration. The study provides an adoptable model to optimize self-regulated learning, which is a skill set that may be taught and may be able to assist students in setting specific goals for themselves and evaluating their progress. Students who can self-regulate are more proactive and less reactive in their learning.
L’Ennui Des Syrtes Or The Boredom Of Empires
Authors: Finkielsztein Mariusz
Published: October 2024

The paper presents the phenomenon of boredom in Julien Gracq’s novel Le Rivage des Syrtes (The opposing shore). The book describes Orsenna, oligarchic city-state loosely based on Venetian republic and empire, which is in a state of phoney war with Farghestan, a mysterious country across the closed sea of Syrtes. The story, narrated by Aldo, young aristocrat assigned for civic duty on the outskirts of empire, depicts the collective mood of anxious anticipation and boredom of the citizens of Orsenna “waiting for barbarians.” The paper analyses Gracq’s novel as a literary illustration of the theories of civilization demise, primarily that of Oswald Spengler, and of the decadence state of society led by bored and languorous elite. In the article, I hypothesize that the demise of empires can be partially attribute to them being boring for their civic agents and subjects alike. The sense of meaninglessness and the feeling of interminable ennui seem to contribute to the attitude of carelessness in both these groups resulting in lack of loyalty and low morale. I suggest that Orsenna’s citizens suffer from societal existential boredom and that similar affliction might have been observed in late British Empire.
Hubungan Pola Asuh dan Adiksi Internet pada Remaja Kristen di Jabodetabek
Authors: Surjanto Siouw Meiliana Griselda , Helena Helena
Published: October 2024

Christian teenagers Jabodetabek, like teenagers in general, are vulnerable to internet addiction. The type of parenting style from parents plays an important role in determining the level of internet addiction of adolescents. This study aims to identify differences in the level of internet addiction based on the type of parenting style among Christian adolescents in Greater Jakarta. A total of 291 adolescents participated in this study. This study uses two instruments, namely the Internet Addiction Test (IAT) to measure the level of internet addiction and the Parenting Style Inventory-II (PSI-II) to identify the type of parenting style of parents. The results showed that neglectful parenting was associated with higher rates of internet addiction in adolescents. In contrast, authoritative and permissive parenting, which has a higher level of responsiveness, tends to be associated with lower rates of internet addiction. These findings show the importance of responsive parenting in preventing internet addiction in adolescents.
Suara dalam Keheningan: Membaca Ulang Kisah Elia dalam 1 Raja-Raja 19:1-18 sebagai Dampak dari Trauma Psikologis
Authors: Huka Elsami Castigliani
Published: October 2024

The story of Elijah in 1 Kings 19:1-18 is often understood as a narrative about disappointment and escape. This article aims to analyze the psychological trauma experienced by Elijah. The research focuses on Elijah's experiences following his battle against the prophets of Baal on Mount Carmel. Despite achieving victory, Elijah falls into depression and a desire to die due to the political threats from Jezebel. This article explores the parallels between Elijah's story and the characteristics of psychological trauma, such as feelings of threat, flashbacks, and avoidance. The journey from the wilderness to Mount Horeb brings Elijah to encounter God in a gentle voice and the whisper of a soft breeze, renewing his strength and giving him the confidence to continue his mission. This research employs qualitative methods with a literature review on psychological trauma and narrative text analysis to gain deeper understanding. Reading Elijah's story through the lens of psychological trauma offers several important lessons: first, trauma can be experienced by anyone, including those who seem strong; second, God is always present and provides healing for the wounded; and third, God's voice can come in silence and gentleness to guide us toward resilience.
Colocalization of genetic regions that confer resistance/susceptibility against Puccinia species and association with Pyrenophora teres loci within the barley genome
Authors: Clare Shaun J. , Novakazi Fluturë , Hayes Patrick M. , Moscou Matthew J. , Brueggeman Robert S.
Published: October 2024

Cereal rust diseases, including leaf, stem, and stripe rust, are some of the most devastating and economically important diseases of barley. However, host–pathogen genetic interaction research for each pathosystem is typically conducted independently and in isolation. Examples of host resistance/susceptibility genes functioning sympathetically to multiple pathogens or antagonistically to additional pathogens have been reported. Therefore, consolidation of loci that have been reported in multiple studies and across pathosystems is useful for variety development to maximize resistance to multiple pathogens and avoid inadvertent incorporation of susceptibility loci that act antagonistically to other pathogens. This review summarizes loci reported in three key biotrophic pathosystems of barley, including leaf, stem, and stripe rust. In conjunction with previously consolidated net blotch loci, this review lays the foundation for a wider barley rust resistance/susceptibility atlas. This review aims to inform breeders and researchers in rapidly identifying accessions and loci that need further characterization and which loci would be most useful to introgress into elite varieties.
Differential abundance of microRNAs in seminal plasma extracellular vesicles (EVs) in Sahiwal cattle bull related to male fertility
Authors: Chauhan Vitika , Kashyap Poonam , Chera Jatinder Singh , Pal Ankit , Patel Aditya , Karanwal Seema , Badrhan Shiva , Josan Fanny , Solanki Subhash , Bhakat Mukesh , Datta Tirtha Kumar , Kumar Rakesh
Published: October 2024

Sahiwal cattle, known for their high milk yield, are propagated through artificial insemination (AI) using male germplasm, largely contingent on semen quality. Spermatozoa, produced in the testes, carry genetic information and molecular signals essential for successful fertilization. Seminal plasma, in addition to sperm, contains nano-sized lipid-bound extracellular vesicles (SP-EVs) that carry key biomolecules, including fertility-related miRNAs, which are essential for bull fertility. The current study focused on miRNA profiling of SP-EVs from high-fertile (HF) and low-fertile (LF) Sahiwal bulls. SP-EVs were isolated using size exclusion chromatography (SEC) and characterized by dynamic light scattering (DLS) and nanoparticle tracking analysis (NTA). Western blotting detected the EV-specific protein markers TSG101 and CD63. The DLS analysis showed SP-EV sizes of 170–180 nm in HF and 130–140 nm in LF samples. The NTA revealed particle concentrations of 5.76 × 1010 to 5.86 × 1011 particles/mL in HF and 5.31 × 1010 to 2.70 × 1011 particles/mL in LF groups, with no significant differences in size and concentration between HF and LF. High-throughput miRNA sequencing identified 310 miRNAs in SP-EVs from both groups, with 61 upregulated and 119 downregulated in HF bull. Further analysis identified 41 miRNAs with significant fold changes and p-values, including bta-miR-1246, bta-miR-195, bta-miR-339b, and bta-miR-199b, which were analyzed for target gene prediction. Gene Ontology (GO) and KEGG pathway analyses indicated that these miRNAs target genes involved in transcription regulation, ubiquitin-dependent endoplasmic reticulum-associated degradation (ERAD) pathways, and signalling pathways. Functional exploration revealed that these genes play roles in spermatogenesis, motility, acrosome reactions, and inflammatory responses. qPCR analysis showed that bta-miR-195 had 80% higher expression in HF spermatozoa compared to LF, suggesting its association with fertility status (p < 0.05). In conclusion, this study elucidates the miRNA cargoes in SP-EVs as indicators of Sahiwal bull fertility, highlighting bta-miR-195 as a potential fertility factor among the various miRNAs identified.