bluuebunny/crossref_metadata_2025 huggingface dataset:
Mechanical and Wear Properties of Developed Cellulosic Fiber-Particles Hybrid Reinforced Epoxy- Based Composites for Automotive Application
Authors: Oluwole Oladele Isiaka , Olumide Falana Samuel , Nnabuike Onuh Linus , Olanrenwaju Olajesu Favour , Oluwagbenga Adelani Samson , Ebube Nnodu Precious , Johnson Ajala Oluwatosin
Published: June 2024

Studies are presently ongoing to advance the development of bio-composite materials through the exploration of the potential use of reinforcements of natural origin in polymer matrixes. In this particular investigation, hybrid reinforced composite was formulated for automotive application by utilizing epoxy as the matrix and sisal fiber-paper particles as the reinforcements. The sisal fiber was extracted employing soil retting method, subjected to surface treatment, and combined with paper particles. Following preparation of the reinforcements, predetermined compositions (3, 6, 9, 12 and 15 wt %) were mixed with epoxy resin before being poured into the moulds using hand layup process and were allow to cure. The study focused on the mechanical, wear, and water absorption properties, as well as the surface morphologies of the developed composites. The results of the study revealed that the optimal properties were achieved with the utilization of 9 wt. % and 12 wt. % sisal fiber-paper particles reinforced composite. Particulate paper was discovered to be a suitably surface compatibilizer in thermosets when used as fillers with fiber reinforcement. Thus, the epoxy based composite reinforced with hybrid sisal fiber-paper particles is suitable for automobile application in the fabrication of bumper and other epoxy based body parts.
Cavitational Erosion Behavior of a Biodegradable Alloy from the Zn-Mg System for Biomedical Applications
Authors: Maria Iordache Cristina , Nicolae Luca Alexandru , Bordeasu Ilare , Ciungu Gabriela , Ghiban Brandusa
Published: June 2024

Zinc and magnesium are known to be biocompatible metals. For this reason, current technologies seek to build parts to be implanted in various places to help the human body. Among these are those in the blood circulatory system, such as the stars and valves at the heart, which aim to increase the life span of the hydrodynamic shocks of the blood circulatory system, in order to prevent heart attacks, respectively the bursting of various vessels that can be life-threatening. Studies in the field of flow show that even in the human body there are manifestations of cavitational type, as a result of pressure variations, with decrease below that of vaporization and then increase. Starting from these findings, the paper presents the results of the cavitation tests, carried out on the bicocompatiobil ZnMg alloy, created in Politehnica University of Bucharest laboratories. The objective is a new and future one that will lead to the realization of valves for the heart, or stars, that can withstand the shocks produced by the implosions of the cavitational bubbles in the blood. For this purpose, microstructural investigations are performed, mechanical properties are analysed and the behavior and resistance to erosion generated by vibrating cavitation are studied, according to the reference standard ASTM G32-2016. The results, compared to those of pure zinc, show that this alloy is a solution for building biocompatible components that can serve cardiac people, in order to reduce the harmful effects of the blood circulatory system.
On the formation of accounting and analytical information in investment management
Authors: MANYAEVA Vera A. , KOSINOV Stepan S.
Published: June 2024

Subject. This article considers a set of theoretical and practical provisions on the formation and use of accounting and analytical information in the investment management during the activities of a commercial organization.
Objectives. The article aims to theoretically substantiate the composition of accounting and analytical information and develop practical recommendations for the use of this information in making and implementing investment decisions.
Methods. For the study, we used the general scientific research methods and special techniques, observation, and systems and comparative analyses.
Results. Based on the study of the process of implementing an investment decision, the article defines three stages in it and theoretically substantiates the composition of the accounting integrated information space at each stage of the investment decision. It also reveals the content of the investment analysis area and offers practical recommendations on the use of accounting and analytical information in investment management.
Conclusions and Relevance. The article concludes that there is no approach to the formation of an integrated accounting and analytical information space in investment management. The results of the study can be used by managers and specialists whose professional activities are related to investment activities in the process of preparing information for investment decisions by the management of the organization.
Non-financial asset valuation at higher education institutions: The theoretical and practical aspects
Authors: SAKHAPOV Bulat R.
Published: June 2024

Subject. This article focuses on the issues of initial and subsequent valuation of non-financial assets at Russian higher education institutions.
Objectives. The article aims to analyze the provisions of the accounting policy of educational institutions for higher education in relation to the valuation of non-financial assets, compare them with the Federal Accounting Standards, identify problematic aspects, and determine the areas for their solution.
Methods. The regulations on the accounting policy of twenty six higher education institutions of Russia in relation to the valuation of non-financial assets are the basis of the study. For the study, I used observation, comparison, generalization, and interpretation.
Results. The article presents the results of the analysis of the composition of costs incurred by institutions in the process of creating an object of fixed assets. It also offers recommendations on the inclusion of interest expenses on long-term liabilities in the initial cost of non-financial assets during their construction (creation) using own resources and options for assessing the value of replaced (disposed) parts of fixed assets, and a methodology for their calculation. A list of expenses included in determining the initial cost of intangible assets created by higher education institutions on their own is also presented.
Conclusions. To improve the accounting of transactions for the acquisition and creation of fixed assets, it is advisable to establish the procedure for allocating the costs of delivery of several fixed assets in the accounting policy of educational organizations, determine the methods of attributing additional borrowing costs, as well as establish the criterion for the materiality of such expenses. It is concluded that higher education institutions should have a unified methodology for accounting costs when carrying out regular scheduled overhauls, technical inspections and maintenance of fixed assets.
Greenwashing as an institutional trap
Authors: VEGNER-KOZLOVA Ekaterina O. , KOLOTOVKINA Polina D.
Published: June 2024

Subject. This article considers the mechanisms for regulating harmful transformations that arise in the course of cyclical changes and slow down the achievement of sustainable development goals. Objectives. The article aims to determine the position of greenwashing in the institutional economic theory. Methods. For the study, we used the comparative and causal analyses. Results. The article finds that greenwashing is characterized by an increase in the impact on economic systems. It is necessary to form an alternative institution to reduce the negative long-term consequences of greenwashing. Conclusions. Being an institutional trap, greenwashing has a negative impact on the relationship between economic agents at all levels, hindering the achievement of sustainable development goals and the real greening of the economy.
ПОТЕНЦІАЛ ЗАСТОСУВАННЯ ЦИФРОВИХ ТЕХНОЛОГІЙ В ОСВІТНЬОМУ СЕРЕДОВИЩІ ЗВО ПРИ ПІДГОТОВЦІ МАЙБУТНЬОГО ПЕДАГОГА
Authors: Цегельник Тетяна , Захарова Ганна , Силенко Юлія
Published: June 2024

У статті авторами обумовлено сучасність та важливість адаптації сучасних фахівців до умов цифровізації ринку освітніх послуг, що зумовлено пандемією, а згодом і воєнним станом в Україні. Наголошено, що сучасні педагоги повинні адаптуватись до вимог сучасного освітнього простору, де оволодіння цифровими технологіями є стратегічними завданнями системи освіти та визначать інформаційно-цифрову компетентність. Зазначено, що в особистій практиці авторами застосовується цілий спектр цифрових технологій задля створення віртуального і фізичного контенту (Moodle, Google Class, Google Drive, LearningApps.org, Wordwall.net, Kahoot, MindMeister, Coggle, Miro, Padlet, MentiMeters, Worditout.com, Canva). Зазначені цифрові технології, як зазначається авторами, застосовуються на різних етапах діяльності, а також розвивають метанавички, що уможливлює проєктування змісту майбутньої освітньої діяльності.
ОСОБЛИВОСТІ ОПАНУВАННЯ ІНШОМОВНОЇ ЛЕКСИКИ СТУДЕНТАМИ НЕМОВНИХ ВИЩИХ ЗАКЛАДІВ ОСВІТИ
Authors: Кубай Марина , Коляска Ярослав
Published: June 2024

Стаття присвячена дослідженню особливостей роботи з іншомовною лексикою. Розглядаються основні етапи формування необхідних навичок студентів під час навчання; інструменти та ресурси, які допомагають у вивченні лексики: онлайн-словники, мобільні додатки й інтерактивні вправи. Обговорюються індивідуальні підходи до вивчення лексики, враховуючи різні стилі навчання та індивідуальні особливості студентів. Увага акцентується на важливості постійної практики і використання мовних навичок у реальних ситуаціях для досягнення успіху в опануванні іноземної мови.
АКТИВНІ МЕТОДИ НАВЧАННЯ У ФОРМУВАННІ ЦИФРОВОЇ КОМПЕТЕНТНОСТІ БАКАЛАВРІВ З ІНЖЕНЕРІЇ ПРОГРАМНОГО ЗАБЕЗПЕЧЕННЯ
Authors: Григоренко Владислав
Published: June 2024

Стаття присвячена актуальній проблемі формування цифрової компетентності бакалаврів з інженерії програмного забезпечення. Обґрунтовано та розроблено методичні рекомендації щодо використання активних методів навчання у формуванні цифрової компетентності бакалаврів з інженерії програмного забезпечення. Визначено ключові компоненти цифрової компетентності бакалаврів з інженерії програмного забезпечення. Розроблено комплекс активних методів навчання для формування цифрової компетентності студентів. Обґрунтовано доцільність використання активних методів навчання у формуванні цифрової компетентності бакалаврів з інженерії програмного забезпечення. Запропонований комплекс активних методів може бути використаний викладачами закладів вищої освіти при викладанні дисциплін, пов’язаних з інженерією програмного забезпечення, а також для самостійного навчання студентів.
ВИКОРИСТАННЯ ШТУЧНОГО ІНТЕЛЕКТУ В НАВЧАННІ БІОЛОГІЇ
Authors: Кубікова Катерина
Published: June 2024

У статті розглянуто вплив штучного інтелекту на сферу освіти. З’ясовано, як хмарні технології, віртуальна реальність та штучний інтелект можуть збагатити процес навчання біології. Розглянуті корисні платформи для педагогів, що пропонують інструменти штучного інтелекту для створення інтерактивних уроків. Такі ресурси дозволяють створювати персоналізовані матеріали, враховуючи індивідуальні потреби учнів і пропонуючи рекомендації для підвищення успішності навчання. Зауважено на ризиках впровадження новітніх технологій в навчальний процес.
Calculated Kindness? The Voices of Women Refugee Claimants: Accessing Pre- and Postnatal Health Care Services in Toronto, Ontario
Authors: Gateri Helen
Published: June 2024

In Canada, refugee claimants are given temporary immigration status, making access to health care services challenging. While the federal government determines the entitlements granted to refugee claimants, provinces are responsible for delivering health care services. This qualitative study conducted in-depth semi-structured interviews with eight refugee claimants and six service providers in Toronto, Ontario. An intersectional theoretical framework was employed to examine the experiences of women refugee claimants and their complicated and often incomplete access to prenatal and postnatal health care services. Findings revealed that delivery of health care services in Ontario created barriers to access and under-utilization of services resulting from intersections of health coverage, immigration status, gender, class, and discrimination.
Enhancing Food-Entrepreneurship Skills of University Students Through Training in Burger Production And Its Entrepreneurial Experience
Authors: Arief Putra Aronal , Sandra Afriani , Novia Deni , Fitri Kurnia Yulianti , Rahmi Elfi
Published: June 2024

Burgers are processed foods that are interesting to develop as one of the entrepreneurs' products. Training in burger making and providing entrepreneurial experience to the participants as a form of community service were conducted. Implementation of this activity includes preparation, participant admission, production training, and product selling. Patty formulation, patty molding, contact grilling, burger plating, packaging, and selling were conducted during practice. From this activity, enhancing the knowledge and skill of participants during production in the processing room and selling in campus areas are significant to creating the essential entrepreneur ability. The development of character and spirit of entrepreneurship and profit gaining during selling represents the enlarged passion of the participant toward the real entrepreneurship environment. Further guidance is required to encourage the participant to transform into a start-up business
التعليل النحوي في مباحث الأسماء
Authors: عبد الله كريفع الجنابي بشائر نصر الله , علاوي الجبوري عادل صالح
Published: June 2024

الوافية في شرح الكافية للإمام الحسن بن محمد بن شرف شاه ، ركن الدين العلوي الموصلي الأسترابادي الإمام العلاّمة المتكلم النحوي ، صاحب التصانيف في النحو والصرف والأدب  شرح الكافية بثلاثة شروح : الأول: البسيط ، والثاني: الشرح المتوسط و هو أشهرها والمتدّاول سّماه الوافية، والثالث : الصغير (والوافية في شرح الكافية) هو الشرح المتوسّط من شروح ركن الدين الإسترابادي الثلاثة ، أشتهر هذا الكتاب أكثر من أخويه - البسيط والصغر - لسهولته على الدارسين ، إذ ليس بالمطول المُمل ولا بالمختصر المُخلّ ثم تَبع شرح الوافية حواشٍ أخرى منها (الكشف) لصاحبنا سِراج الدين محمد بن عمر الحلبي , فكان كتاب (كشف الوافية في شرح الكافية) حلاً لغوامض الوافية ، الذي كشف عن طول باع مؤلفه في النحو واللغة والمنطق والبلاغة والفلسفة، ما يهمنا هنا هو التعليل النحوي عند عالم ترك مؤلفاً زاخراً بالعلة والتعليل وهو (كشف الوافية في شرح الكافية) ، فقد ألف ابن الحاجب - (رحمه الله )- كتابا مختصراً سماه (الكافية في النحو) اتسمَ بالشمول والإيجاز غير الُمخلّ، فاحتاج معه  إلى  الشرح والتيسير، فأقبل عليه النحاة  يشرحونه وييسرونه للمتعلمين ، فكثرت الشروحات والحواشي للكافية لكثرة المتداولين.
تقدير حجم الجريان السطحي لحوص وادي القصر في قضاء الشرقاط بطريقة CN-SCS))
Authors: عباس خضير ضاحي خضر , حميد الجبوري دلي خلف
Published: June 2024

اعتمد البحث على طريقة (CN-SCS) وهي إحدى الطرق المهمة التي تستخدم لتقدير الحصاد المائي والتي طورتها ادارة صيانة التربة التابعة لإدارة الزراعة بالولايات المتحدة الامريكية (Soil Conservation (Service عام 1970م، ووضعت صيغتها المشهورة في عام 1986م، وأسلوب (SCS) عبارة عن مجموعة من المعادلات الرياضية يعتمد في مدخلاتها على توفير معلومات عن عطاءات الأرض وأنماط استخدامها وهيدرولوجية التربة، ونوع الغطاء النباتي، وكميات الأمطار الساقطة لمعرفة خصائص الجريان وامكانية حصاد المياه في حوض وادي السكران، من خلال معرفة وتحليل وصف الغطاء الاراضي ومعرفة أنواع الترب الهيدرولوجية في المنطقة وتحديد الحالة المسبقة لرطوبة التربة، وبعد استكمال هذه العناصر الثلاثة تم الحصول على قيم الـ CN التي تعبر عن مدى نفاذية التربة، والمعامل(( الذي يعبر عن الإمكانية القصوى لاحتفاظ التربة بالماء، والمعامل (LA) الذي يبين كمية المفقود من مياه الامطار قبل بدء الجريان السطحي، والمعاملين (2) و (CV) اللذان يعبران عن عمق وكمية حجم الجريان السطحي في المنطقة.
Legal regulation of the trade secret regime in corporate conflicts
Authors: Titorenko Semen Konstantinovich
Published: June 2024

The author examines the features of the legal regulation of the trade secret regime in corporate conflicts between participants of business entities (limited liability companies, joint-stock companies). A study of the legal regulation of the Russian Federation, in terms of the legal regulation of the trade secret regime, has been conducted, and the judicial practice of applying the trade secret regime has been analyzed. Scientific works in the field of legal regulation of the trade secret regime in the Russian Federation, the countries of the Commonwealth of Independent States and the United States of America are also analyzed. As a result of the research, the author highlights a gap in the legal regulation of the trade secret regime in corporate conflicts. The problem is that despite the existence of a system of legal regulation of the trade secret regime, the share of trade secret leaks continues to grow. Previously, no research has been conducted in the field of legal regulation of the trade secret regime in the presence of corporate conflicts. Public relations arising in connection with the application of the commercial secret regime are regulated by the Law on Commercial Secrets, certain issues are explained in the information letter of the Presidium of the Supreme Arbitration Court of the Russian Federation dated 01/18/2011 No. 144 "On some issues of the practice of arbitration courts considering disputes on the provision of information to participants in business companies", while the share of leaks of commercial secrets is constantly growing. In this regard, it is necessary to identify ways to improve legal regulation in the field of legal regulation of the trade secret regime in corporate conflicts. To investigate the legal regulation of the Russian Federation, judicial practice, scientific work and identify problems of legal regulation of the trade secret regime in corporate conflicts between participants of business entities (limited liability companies, joint-stock companies).
The Perception of Socrates' Ethics in F. Nietzsche's Moral Philosophy: Overcoming Metaphysics and its "Eternal Recurrence"
Authors: Kosorukova Aleksandra Andreevna , Frolova Margarita Nikolaevna
Published: June 2024

The subject of the study is to consider the perception of Socrates' ethics in Nietzsche's philosophy as a theoretical basis for the formation of the key provisions of Nietzsche's philosophy of morality, in particular, possible elements of metaphysical thinking in these provisions. Nietzsche's critical argumentation in relation to the philosophical views of Socrates was considered as the basis for the key provisions of Nietzsche's moral philosophy, particularly in the aspect of its connection with the question of metaphysics. The focus of the author's research is the analysis of the perception of Socratic ideas in the context of criticism of Nietzsche's project of metaphysics through the prism of morality: the idea of self-overcoming and the increasing will to power turn out to be the basis for understanding Nietzsche's new project in moral philosophy. The research methodology includes theoretical methods, historical-philosophical and ethical-philosophical analysis of the consideration of Socrates’ ethics by Nietzsche, and the influence of this consideration on the ethical position of the latter. As a research basis, the article uses the approaches of J. Deleuze, L. Klages, A.F. Losev, L. Shestova, V.M. Bakuseva. The novelty of the article lies in tracing the influence of Socratic ethics on Friedrich Nietzsche's formulation of the moral problem, especially in the aspect of the question of metaphysics in Nietzsche's ethical thought (both criticism of metaphysics and the continuation of some lines of the metaphysical tradition). The first line of Nietzsche's criticism of Socratic philosophy was to identify the influence of Socrates on the emergence of European nihilism. Nietzsche's second thought, in relation to Socrates, concerned the "theoretical man".The third idea, which can be designated as one of the most important features of Nietzsche's moral philosophy, was the idea of self-overcoming.
REALIDADE AUMENTADA E ESTRATÉGIAS ADOTADAS NO ENSINO DE PROJETO BIOCLIMÁTICO EM ARQUITETURA
Authors: Pimenta Rosana Aparecida , Albrecht Clarissa Ferreira , Carlo Joyce Correna , Fernandes Tulio Resende Alcântara
Published: June 2024

O presente ensaio aborda a experiência e os conceitos de Realidade Aumentada e Realidade Virtual para refletir sobre o projeto bioclimático como tema e conteúdo a ser explorado na docência em arquitetura. Problematiza o ensino de projeto bioclimático a partir da expectativa da adoção da Realidade Aumentada como recurso didático para o ensino superior na área, o que foi feito com vistas às estratégias adotadas por meio da experiência do estágio de docência junto à disciplina ARQ 326 – Conforto Térmico, ministrada para estudantes do terceiro período do curso de graduação em Arquitetura e Urbanismo da Universidade Federal de Viçosa (UFV). Ao abordar o tema da Bioclimatologia e do projeto baseado em desempenho, a disciplina representa o primeiro contato dos estudantes com esses temas, alguns dos quais, na percepção estagiário de docência, foram mais bem aproveitados a partir da adoção das ferramentas digitais se comparadas aos recursos analógicos em sala de aula. Além disso, o estágio de docência apresentado aqui, proporcionou a reflexão sobre a transposição didática dos conteúdos pautados no intuito de vislumbrar recursos para a mediação dos temas a serem explorados em AR pelo pesquisador junto aos graduandos.
Hidradenitis suppurativa: review of international clinical guidelines for the diagnosis and treatment of the disease
Authors: Khairutdinov Vladislav R. , Burova Sofia A. , Olisova Olga Yu. , Sokolovskiy Evgeny V. , Kokhan Muza M. , Kotrekhova Liubov P. , Rakhmatulina Margarita R. , Samtsov Alexey V. , Araviiskaia Elena R. , Pirogova Anna S.
Published: June 2024

Background. Hidradenitis suppurativa hidradenitis is a chronic recurrent inflammatory skin disease that develops after puberty and is characterized by the appearance of recurrent painful nodes, abscesses, the formation of fistula passages and scars on skin areas rich in apocrine sweat glands. Treatment of purulent hidradenitis is aimed at suppressing inflammation, relieving pain, preventing the formation of fistulas and scars.
The objectives of this review. Summarize the information in the published international clinical guidelines for the diagnosis and treatment of purulent hidradenitis, their comprehensive assessment and comparison with each other.
Methods. In the period from December 2022 to February 2023, scientific articles were searched in the PubMed database of the National Center for Biotechnological Information. Inclusion criteria: scientific articles in English, without date restrictions; interdisciplinary publications of specialists in which dermatovenereologists participated.
Results. The analysis of the existing relevant international clinical recommendations for the diagnosis and treatment of purulent hidradenitis indicates the absence of specific treatment schemes and algorithms, criteria for evaluating the effectiveness of therapy. In the treatment of purulent hidradenitis, the use of external keratolytics, antiseptics and antibiotics is recommended. Among systemic drugs, antibiotics, retinoids, immunosuppressive agents, hormonal drugs are used. The highest therapeutic efficacy in patients with purulent hidradenitis was shown by genetically engineered drugs that inhibit TNF-α and IL-17A.
Conclusions. Patients with purulent hidradenitis require various treatment approaches, including a variety of surgical interventions, depending on the stage, severity, prescription of the disease and the general condition of the patient. The basic principle is the individual selection of the treatment method for a particular patient. In this regard, there is a need to develop domestic clinical guidelines for the management of patients with purulent hidradenitis.
Analysis of the consistency of doctors’ opinions in the assessment of dermatoscopic images of actinic keratosis, Bowen’s disease, keratoacanthoma and squamous cell cancer
Authors: Mironycheva Anna M. , Lazukin Valery F. , Grishin Artem S. , Garanina Oxana E. , Uskova Ksenia A. , Stepanova Yana L. , Zinoveva Elena A. , Makarychev Ilya S. , Tomilov Vyacheslav O. , Slesareva Elena S. , Zhdakova Ekaterina A. , Abdullaeva Leila E. , Klemenova Irina A. , Shlivko Irena L.
Published: June 2024

Background. Squamous cell skin cancer (SCSC) is the most dangerous tumor of all non-melanocytic skin neoplasms due to its aggressive course with destructive growth and frequent metastasis. Another characteristic feature of SCSC is the presence of precancerous conditions such as actinic keratosis, arsenic keratosis and PUVA-keratosis. In the gradual increase in the degree of keratinocyte dysplasia to the development of invasive forms of skin malignancies, the following continuum of diseases can be distinguished: actinic keratosis — Bowen’s disease — keratoacanthoma — SCSC. Dermatoscopic signs of each of the listed nosologies can also occur in other diseases of this chain, which can complicate diagnosis and lead to erroneous patient management tactics.
Aim. To determine the consistency of dermatologists’ opinions in assessing dermatoscopic images of actinic keratosis, Bowen’s disease, keratoacanthoma and SCSC, depending on work experience.
Methods. The study was conducted on the basis of the Scientific and Practical Center for the Diagnosis and Treatment of Skin Tumors of the Federal State Budgetary Educational Institution “PIMU” of the Ministry of Health of the Russian Federation. Based on the literature data, we compiled a generalized list of possible dermatoscopic signs of actinic keratosis, Bowen’s disease, keratoacanthoma, SCSC and analyzed dermatoscopic images of 85 elements of actinic keratosis, 28 — of Bowen’s disease, 10 — of keratoacanthoma and 24 — of SCSC. 10 dermatovenerologists participated in the study, half of whom (Group 1) had experience in the field of dermatoscopy for more than 4 years, and the other half (Group 2) — for less than 4 years.
Results. The study reveals statistically significant deviations in the frequencies of dermatoscopic signs between the two groups of specialists when analyzing images of actinic keratosis and Bowen’s disease. Differences in the frequency of detection of keratoacanthoma and SCSC signs between specialists with more than 4 years of experience in the field of dermatoscopy and less than 4 years’ experience have not been found.
Conclusion. Taking into account the average number of signs, the statistically justified result of the analysis is the inference that the average group frequencies in Group 1 and Group 2 are equal. The conclusion is that the opinions of specialists in the field of dermatoscopy are highly consistent, regardless of work experience. This indicates the high diagnostic value of the method, despite its subjective nature.
Perspectives of undergraduate medical students regarding competency-based curriculum
Authors: SHARMA SONAM , CHHATWAL JUGESH
Published: June 2024

Background

The competency-based undergraduate medical curriculum has a number of new elements. Few authors have attempted to understand the students’ viewpoints on the curriculum. We assessed undergraduate students perspectives and ratings about various elements after 2 years of implementation of the curriculum.

Methods

We included 240 students (2019 and 2020 admission). An invitation letter-cum-information sheet was sent to all the students by email informing them about the study, keeping their identity confidential and the implied consent. A validated questionnaire based on a 5-point Likert scale including 35 closed-ended questions eliciting the students’ perception on various elements of the new curriculum and a rating scale from 1 to 5 was designed. Data collection was done using Google forms.

Results

Of the 240 respondents, 192 (80%) had positive perceptions for the Foundation Course, Attitude, Ethics and Communication skills, Early Clinical Exposure and Community Health Visits. Integrated Teaching, Small Group Teaching and Assessments were viewed less positively (62.9%–75%) and Self-directed Learning received the lowest positive responses (57%–58%). For training as a doctor, the elements considered most valuable were Early Clinical Exposure (70.4%) and Community Health Visits (70.4%) while the least were Logbooks (35.5%) and Reflections (34.2%).

Conclusions

Students found Early Clinical Exposure and Community Health Visits the most valuable elements whereas Self-directed Learning, Logbooks and Reflections were rated as the least useful.
Exogenous endophthalmitis caused by Enterobacter cloacae following water gun injury
Authors: DEB AMIT KUMAR , NEENA ASWATHI , CHOWDHURY SUSHMITA SANA , SARKAR SANDIP , SUNEEL SANGARAJU , GOKHALE TANMAY
Published: June 2024

Enterobacter is a Gram-negative anaerobic bacillus. Enterobacter-associated endophthalmitis is rare. We report Enterobacter cloacae-associated traumatic endophthalmitis following a water gun injury with no visible external entry wound. A 46-year-old man presented with features masquerading as traumatic uveitis in his left eye following injury by water stream from a toy gun. He was started on topical steroids but within 2 days of initial presentation, there was worsening of vision, presence of hypopyon in the anterior chamber and presence of vitreous exudates confirmed on ocular ultrasound B-scan. Endogenous endophthalmitis was ruled out by extensive work-up including sterile urine and blood cultures. Emergency vitrectomy was done along with lensectomy and silicone oil implantation. E. cloacae were isolated from the vitreous sample, which were sensitive to all standard antibiotics tested. Final visual acuity was 20/200. Traumatic endophthalmitis is usually preceded by a penetrating ocular injury in the form of a corneal, limbal or scleral tear with or without choroidal tissue prolapse and vitreous prolapse. A high index of suspicion is, therefore, needed for the diagnosis of endophthalmitis in the absence of corneal injury following water jet trauma to the eye.
Enhancing the Capability of Future Medium-size Telescopes: First Light of the SALTO Demonstrator
Authors: Paul Jyotirmay , Orban de Xivry Gilles , Absil Olivier , Adam Cédric , Albart Pierre , Bastin Christian , Boulanger Alice , de Ville Jonathan , Gabriel Eric , Méant Laurence , Moreau Vincent , Orban Sabrina , Remacle Pierre , Languy Fabian , Georges Marc , Vandenrijt Jean-François , Millou Gabriel , Nigot Claude , Caramia Vincenzo
Published: June 2024

The adaptive optics (AO) technology is crucial to achieve the full potential of ground-based telescopes. Over the last three decades, the world has witnessed the successful advent and operation of AO systems on large ground-based telescopes. The complexity and cost of AO systems have largely gone down in the last decade thanks to advances in deformable mirror, wavefront sensor, and real-time computing technologies. Here, we present a robust Rayleigh scattered laser-guided single conjugated adaptive optics system called SALTO, which was designed, built, and tested in the Belgian countryside on a 1-meter class telescope. This project aims to demonstrate the possibility of rejuvenating the scientific goals of medium-class telescopes (1-3 m) with AO technology, as well as to enable optical telecommunication from relatively poor observing sites. This paper discusses the overview of the design, integration and calibration of SALTO. It concludes with the presentation of successful on-sky results at 1.55 μm under 2-3" seeing.
A High-resolution Spectrograph at a Metre-class Telescope at Devasthal: What Can Be Gained?
Authors: Dsilva Karan
Published: June 2024

The Indo-Belgian bilateral project titled “Belgo-Indian Network for Astronomy and Astrophysics (BINA)” is an excellent initiative to spark scientific collaboration between Belgian and Indian astronomers. The Belgian university, KU Leuven, owns and operates the semi-robotic Mercator telescope - a 1.2m telescope stationed at the Roque de los Muchachos observatory on the island of La Palma. This telescope is equipped with the High-Efficiency and high-Resolution Mercator Echelle Spectrograph (HERMES). This contribution aims to discuss a long-standing idea - what would BINA, and by extension the entire Indian astronomical community, gain with the addition of a similar 1-m class telescope with a high-resolution spectrograph in Devasthal.
The PRL 2.5m Telescope and its First Light Instruments: FOC and PARAS-2
Authors: Chakraborty Abhijit , Bharadwaj Kapil Kumar , Neelam Jajaendra Siva Sehu Vara Prasad , Sharma Rishikesh , Lad Kevikumar Ashokbhai , Nayak Ashirbad , Jithendran Nikitha , Joshi Vishal , Mishra Vivek Kumar , Ahmed Nafees
Published: June 2024

We present here the information on the design and performance of the recently commissioned 2.5-meter telescope at the PRL Mount Abu Observatory, located at Gurushikhar, Mount Abu, India. The telescope has been successfully installed at the site, and the Site Acceptance Test (SAT) was completed in October 2022. It is a highly advanced telescope in India, featuring the Ritchey-Chrétien optical configuration with primary mirror active optics, tip-tilt on sideport, and wave front correction sensors. Along with the telescope, its two first light instruments namely Faint Object Camera (FOC) and PARAS-2 were also integrated and attached with it in the June 2022. FOC is a camera that uses a 4096 X 4112 pixels detector SDSS type filters with enhanced transmission and known as u’, g’, r’, i’, z’. It has a limiting magnitude of 21 mag for 10 minutes exposure in the r’-band. The other first light instrument, PARAS-2, is a state-of-the-art high-resolution fiber-fed spectrograph operating in the 380-690 nm wave-band, aimed to unveil the super-Earth like worlds. The spectrograph works at a resolution of ∼107,000, making it the highest-resolution spectrograph in Asia to date, It is employed in an ultra-stable temperature and pressure environment, at 22.5 ± 0.001 ◦C and 0.005 ± 0.0005 mbar, respectively. Initial calibration tests of the spectrograph using a Uranium Argon Hollow Cathode Lamp (UAr HCL) have yielded intrinsic instrumental RV stability down to 30 cm s−1.
Amplitude Modulation in a δ Sct star HD 118660
Authors: Sarkar Mrinmoy , Joshi Santosh , De Cat Peter
Published: June 2024

In this paper, we report the detection of amplitude modulation in a δ Scuti star HD 118660. We found that the p-mode frequency at 24.3837 d−1 varies periodically in amplitude with frequency 0.0558±0.00147 d−1. However, all other modes are stable in both amplitude and phase which is clear evidence of non-conservation of visible pulsation mode energy. We constructed a two-frequency model by superimposing two sinusoïds with frequencies ν1 = 24.3837 d−1 and ν2 = 24.4420 d−1 and corresponding phases ϕ1 = 0.5211 rad and ϕ2 = 0.9481 rad to mimic the observed variations of amplitude and phase with time. The plausible explanation of the amplitude modulation in HD 118660 is due to beating of two unresolved closed frequencies ν1 and ν2.
Detection of Variable Stars in the Galactic Globular Cluster M15
Authors: Lata Sneh , Dileep Athul , Sariya Devesh Path , Joshi Santosh , Panwar Neelam , Yadav Ramakant Singh , Mwanzia Dorothy Museo
Published: June 2024

This study reports the discovery of 12 new variable stars in the globular cluster M15 using time series observations from 3.6 m DOT and 2 m class HCT. In total, 198 variable stars were detected in the cluster region, including both known and newly discovered variables. Proper motion data from Gaia EDR3 were used to determine the membership of the identified variable stars. The seven of the new variables are found to be probable members of the cluster. Based on variability characteristics and location in the CMD, two of them are likely RR Lyrae type variables. The majority of the known variables are found to be RR Lyrae type variables.
Timing Analysis of the Intermediate Polar V709 Cas
Authors: Rao Srinivas M. , Pandey Jeewan Chandra , Rawat Nikita , Joshi Arti
Published: June 2024

We have carried detailed time-resolved timing analysis of an intermediate polar V709 Cas, using the long-baseline, short-cadence optical photometric data from the Transiting Exoplanet Survey Satellite. We found an orbital period of 5.3341±0.0004 hr, a spin period of 312.75±0.02 sec, and a beat period of 317.93±0.03 sec, which is similar to the earlier published results. From the continuous high cadence data, we found that V709 Cas is a disc overflow system with disc-fed dominance.
Near-UV and Optical Spectroscopic Investigation of Late-type Stars from the MIRA/Oliver Observing Station
Authors: Karmakar Subhajeet , Bandyopadhyay Avrajit , Weaver William Bruce , Shedge Riddhi , Pandey Jeewan Chandra , Cotton Daniel Vincent , Perkins Jean
Published: June 2024

Late-type stars are the most abundant in the galactic stellar population. These stars, with the similar internal structure to the Sun, are expected to have solar-like atmospheres. Investigating the stellar parameters and chemical abundances on late-type stars is essential to provide valuable constraints about stellar age, chemical evolution, and atmosphere of exoplanets. In this work, we present the study of the Near-UV and optical spectroscopic observation of three latetype stars: HR 8038, AC Her, HD 76446, as obtained from 36-inch MIRA/Oliver Observing Station. We derived surface temperature, gravity, metallicity, and the chemical abundances of light element carbon in the stellar atmosphere. The elemental abundance of the carbon for HR 8038, AC Her, and HD 76446 are derived to be 95%, 97%, and 108%, respectively, of the solar value.
Understanding the Magnetic Activity of M Dwarfs: Optical and Near-Infrared Spectroscopic Studies
Authors: Ram Diya , Mondal Soumen , Ghosh Samrat , Joshi Santosh , Patra Dusmanta , Kumbhakar Rajib
Published: June 2024

We present here preliminary results of stellar activities on three active M dwarfs having strong magnetic fields using optical and Near-Infrared (NIR) (0.38 μm − 2.5 μm) spectroscopic observational data using HFOSC on the 2-m HCT and TANSPEC on the 3.6-m DOT. The sample includes new observations of AD Leo, EV Lac, and Stkm2-809 M dwarfs, including published literature values of 89 M dwarfs. To understand the magnetic field activity on those dwarfs, we used the equivalent widths of spectral features Ca IRT triplet (0.850 μm, 0.854 μm, 0.866 μm), which are generally chromospheric and coronal indicators in M dwarfs, and investigate the correlation between those line strengths with Rossby number, which is defined as the ratio of rotation period (Prot) to convective turnover time (τconv). We find a strong correlation between the equivalent widths of Ca IRT b and Ca IRT c and Rossby number (R0). The correlation shows an increasing trend of equivalent widths of those lines with decreasing R0, and saturation of the equivalent widths of those at lower R0 ≤0.1. To estimate R0, we estimate the rotation periods of three observed M dwarfs in our sample from TESS data, and in the case of other M dwarfs, we used the literature values. Interestingly, in TESS light curves of AD Leo, EV Lac, and Stkm2-809 M dwarfs, we find several flare events. We estimated the bolometric flared energy in a range of 1034 to 1037 erg, which is in the superflare range (more than 1032 erg). We estimate the highest flared energy of 1.22 × 1037 erg for EV Lac in TESS sector 57. To produce such kind of high superflare event, we have estimated the required magnetic field strength of 10.53 kG, which will have an impact on the life habitability of planets around such M dwarfs.
Peculiar Abundances of the Cool Carbon Star HE 1104-0957
Authors: Purandardas Meenakshi , Goswami Aruna , Rengasamy Sridharan
Published: June 2024

We present, for the first time, a detailed abundance analysis of the carbon star HE 1104−0957 based on high resolution (R ≃ 50 000) spectra. Our analysis shows that the object is an extremely metal-poor star with [Fe/H] ≃ −2.96. We find that the object shows enhancement of carbon with [C/Fe] ≃ 1.82. However, it does not fall into any of the sub-groups of carbon-enhanced metal-poor (CEMP) stars based on the characteristic elemental abundance ratios used for the classification of various CEMP sub-groups. HE 1104−0957 is also found to exhibit an enhancement of oxygen and nitrogen with [O/Fe], and [N/Fe] ≃ 1.54, and 2.54 respectively. In HE 1104−0957, α-elements are found to be slightly enhanced with [α/Fe] ≃ 0.46. Fe-peak elements are also moderately enhanced in HE 1104−0957 with a value 0.63 with respect to Fe. Our analysis shows that HE 1104−0957 exhibits enhancement of neutron-capture elements, particularly r-process elements. The low-resolution spectra of this object shows the spectral features characteristics of a typical C-R star. However, we find that the surface chemical compositions of this object is contradictory to that expected for a C-R star. It requires a detailed analysis to better understand the abundance anomalies exhibited by this object.
Formation Scenarios of Ba Stars: New Evidence from the Masses of the Companion AGBs
Authors: Goswami Partha Pratim , Goswami Aruna
Published: June 2024

The abundances of the slow neutron-capture (s-) process elements observed in barium stars can be explained by considering mass transfer in a binary system from an asymptotic giant branch (AGB) star onto a smaller mass and less evolved binary companion star. Based on the abundances of neutron-capture elements, the barium stars are broadly divided into two categories: “strong” and “mild” barium stars. However, an understanding of the role of the characteristic properties of the companion AGBs on the formation of the different types of barium stars is still lacking. This work focuses on investigating the role of the masses of the companion AGB stars in this context. In a recent high-resolution spectroscopic study, we studied in detail the chemical composition of a few barium stars that we have identified. In order to understand the nature and the mass of the companion stars, we first estimated the masses of these objects and then used a parametric model-based analysis to derive the masses of the primary companion stars. The calculation is extended to 205 barium stars taken from literature. An analysis of the mass distribution revealed that both the strong and the mild barium stars occupy the same range of masses. However, their companion AGB stars’ mass distributions peak at two different values of 2.5M⊙ and 3.7M⊙, for the strong and the mild barium stars, respectively. This provides clear evidence that the formation of mild and strong Ba stars is greatly influenced by the initial masses of the companion AGB stars. However, the possible impact of other factors, such as orbital period and metallicity, on the formation scenarios of barium stars remains to be seen.
Extraction of YSO Cores and Active Regions near the Star-forming Site AFGL 5157
Authors: Verma Aayushi , Sharma Saurabh , Dewangan Lokesh
Published: June 2024

We have carried out a quantitative analysis of the 1°×1° region near star-forming site AFGL 5157 using ’Minimal Spanning Tree’ (MST). The analysis reveals that this region consists of five major clusters. The cluster radii of the cores and active regions were found to be varying between 0.75-2.62 pc and 2.77-4.58 pc, respectively, for these regions, while the aspect ratio varies between 0.71 to 7.17. This hints towards the clumpy as well as elongated clusters in the region. We calculated structure parameter Q for each region which varies between 0.41-0.62 and 0.23-0.81 for the cores and ARs, respectively. This shows the existence of fractal distribution in all the cores and ARs except the core of the [HKS2019] E70 bubble.
The Star Formation History of the Young Open Cluster NGC 2244: Study of the Binary Fraction
Authors: Furst Théo , Mahy Laurent , Nazé Yaël
Published: June 2024

A star formation history (SFH) is the stellar record of the various processes that shaped a galaxy and star clusters since its birth to its current physical state. Studying the young open cluster NGC 2244, and in particular its massive stellar population, can improve our understanding of its formation mechanism, stellar evolution, feedback, and provide a basis for a better understanding of the formation of extragalactic star clusters. In this contribution, we present the first steps towards the derivation of the SFH of NGC 2244. We discuss the first results concerning the membership determination and the observed binary fractions of O- and B-type stars among NGC 2244. Finally, an overview of the forthcoming steps is also presented.
Influence of Mid-infrared Galactic Bubble on Surroundings: A Case Study on IRAS 16489-4431
Authors: Hoque Ariful , Baug Tapas , Dewangan Lokesh , Wang Ke , Liu Tie , Mondal Soumen
Published: June 2024

We studied the influence of a massive star on a mid-infrared bubble and its surrounding gas in the IRAS 16489-4431 star-forming region using multi-wavelength data. The Spitzer midinfrared band images revealed the shocked nature of the bubble. Analyses showed that the bubble is developed by a massive star owing to its strong radiation pressure. Evidence of collected material along the edge of the bubble was noted by the cold gas tracer line observed using Atacama Millimeter/submillimeter Array (ALMA). The presence of dense dust cores with bipolar outflows and young stellar objects toward the collected material is suggestive of active star formation possibly influenced by the expansion of the radiation driven bubble.
Census of Young Stars in Galactic Star Forming Region Sh2-88
Authors: Chakraborty Soumita , Mondal Soumen , Panja Alik , Biswas Siddhartha , Pramanik Sudip , Museo Mwanzia Dorothy , Joshi Santosh
Published: June 2024

We present here the census and characterization of Young Stellar Objects (YSOs) associated with the active star-forming H II region Sh2-88 with multi-wavelength data situated in the Vulpecula OB1 association. To understand the extinction properties of Sh2-88 region, we generate an extinction map over 20×20 arcminutes using the neighbourhood method of Gutermuth et al. (2005) from the deep near-infrared HK band photometric archival data of UKIDSS. We find a sizable variable extinction over the region up to AV ≃11.7 mag, with a median value of AV ≃4.3 mag. The high extinction regions trace the dense filamentary structure, which was found earlier in the far-infrared and sub-mm data. Following the YSO classification scheme of Gutermuth et al. (2009), we have identified 74 YSOs in that region using Spitzer-IRAC data from four mid-infrared bands (3.6, 4.5, 5.8 and 8 μm) and 2MASS near-infrared K-band (2.16 μm) data. Among 74 YSOs, six are class I and 68 class II objects. Using IPHAS Hα, r, and i-band photometry, we have identified 41 additional YSOs. Among these 41, four sources are common with IR excess YSOs. From the spatial distribution of YSOs, it is apparent that YSOs are primarily distributed over the relatively higher extinction regions of the cloud, and star-formation activity might be ongoing in those dense parts of the cloud.
A Preliminary Timing Analysis of two Intermediate Polars: UU Col and Swift J0939.7-3224
Authors: Rawat Nikita , Pandey Jeewan Chandra , Joshi Arti , Rao Srinivas M. , De Becker Michaël
Published: June 2024

We present the preliminary timing analysis of confirmed intermediate polar UU Col and possible intermediate polar Swift J0939.7-3224 in the optical band with the help of long-term, high-cadence continuous photometry from Transiting Exoplanet Survey Satellite (TESS). For UU Col, we revise previously reported orbital and spin periods as 3.464 ± 0.005 h and 863.74 ± 0.08 s, respectively. Using the second harmonic of the beat frequency, the beat period is estimated as ∼928 s. These findings indicate that UU Col is a disc-fed dominated disc-overflow accretor. For J0939, we establish the spin period as 2671.8 ± 0.8 s and refine the provisionally suggested orbital period as 8.49 ± 0.03 h. The absence of beat frequency in J0939 signifies that it might be a pure disc-fed accretor; however, an X-ray study of this source will help to understand its true nature.