bluuebunny/crossref_metadata_2025_split huggingface dataset:
Storying family experiences in higher education: Surfacing, awakening, and transforming developing leader identity
Authors: Cooper Maria , Gould Kiri , Gorst Louise 
Published: May 2023

Abstract
Storying family experiences provides a means to explore and support leader identity development. The idea of recalling and reflecting on stories about and from families can surface how orientations to lead are learned early on in life. We report on students’ narratives generated during a postgraduate early childhood education leadership course to understand the significance of family storytelling in leader identity development and the awakenings this process encouraged for those involved. Using McCain and Matkin’s (2019) concept of retrospective storytelling, narrative inquiry underpinned our analysis of students’ family-oriented stories and the identification of two themes regarding their orientation to leadership: the influence of families’ hardships, work ethic and selfless actions; and the expectations associated with being the first-born in the family and the assumed responsibilities. Our findings affirm the transformative potential of selecting, telling, and reflecting on family stories to both understand the roots of leadership motivations and develop leader identities. Implications include promoting a narrative-based pedagogy for leadership development that centres on postgraduate students’ retrospective storying of family experiences.
Enhanced FPGA-Based Controller for Three Phase Shunt Active Power Filter
Authors: Benhamadouche Abdelouahab Djoubair , Sahli Abdeslem , Bakhti Haddi , Ballouti Adel , Drif Mahmoud 
Published: May 2023

Abstract
In this paper, a three-phase shunt active power filter (SAPF) controller with a fully digital implementation is presented. The main goal of this contribution is to implement a digital direct power control (DDPC) algorithm without phase-locked-loop (PLL) for SAPF. This algorithm is intended for power quality improvement and current harmonic elimination. The controller introduced in this paper is cost-effective, has a fast-dynamic response, and has a simple hardware implementation. In order to comply with the above specifications, a dedicated controller has been conceived and fully implemented within a field-programmable gate array (FPGA) device. This FPGA-based controller integrates the whole signal-processing functions needed to drive the SAPF, as well as an original method for sector identification. The intended controller provides the desired power references to select the optimal switching sequences. The switching orders follow the grid reference to drive the voltage source inverter (VSI), so the SAPF achieves good performances while ensuring balanced overall supply currents, unity power factor, and reduced harmonic load currents. The proposed digital implementation achieves a valuable compromise between fast dynamic response, minimum execution time, and reduced FPGA resources, through a simple hardware design implementation. The entire system is developed and simulated using VHDL and VHDL-AMS languages.
Chaos Elimination for a Buck Converter Using the Multi-Objective Grey Wolf Optimiser
Authors: Bakria Derradji , Gozim Djamal , Korich Belkacem 
Published: May 2023

Abstract
A wide variety of nonlinear phenomena, such as bifurcation and chaos, have been observed in power electronics converters. Much research has been conducted on these behaviours in different converter topologies. The buck converter is known to exhibit chaotic behaviour in a wide parameter range, giving rise to unstable behaviours depending on the circuit parameters values. This paper investigates this bifurcation behaviour by varying the parameters of a voltage PI (Proportional Integral) controlled buck converter operating in continuous conduction mode, using a continuous-time model and constant frequency control signal. Furthermore, a novel and improved version of the PI compensation technique, designed using the multi-objective grey wolf optimiser (MOGWO), is proposed to stabilise the buck converter from chaotic state to periodic orbit.
Motyw wody w cyklu Eliasza (1 Krl 17 – 2 Krl 2)
Authors: Józefczyk Kacper 
Published: May 2023

W historii Eliasza niezbyt doceniono znaczącą rolę wody. Jej materialny brak stanowi tło działalności i posłannictwa proroka z Tiszbe. Celem badań była prezentacja motywu wody występującego w cyklu Eliasza w wybranych perykopach: 1 Krl 17,1-16; 18,1-5.20-46; 2 Krl 2,1-18.W opracowaniu wykorzystano głównie z osiągnięć metody historyczno-krytycznej. Metoda ta stara się znaleźć odpowiedź na pytanie, co autor natchniony chciał powiedzieć w danym miejscu i czasie. Jednak ma jednak swoje ograniczenia, stąd wzbogacono ją w niniejszej badaniu o inne formy analizy literackiej tekstów biblijnych: retoryczną, narracyjną i porównawczą.Wyniki wskazały na wagę motywu wody dla całości posłannictwa i misji proroka Eliasza. Stanowi on element konstytutywny dla całego cyklu. Brak wody i spowodowana nim susza jest główną osią rozdziałów 17 i 18. Pierwszej Księgi Królewskiej.
Кількісна оцінка мінімальної можливої відстані між безпілотними літальними апаратами у групі
Authors: Фустій В. С. , Смеляков С. В. , Пархоменко Д. О. , Гладишев М. Г. 
Published: May 2023

В статті проведений аналіз сфер групового застосування безпілотних літальних апаратів (БПЛА). Визначено, що групове використання БПЛА може бути застосовано для оптимізації вирішення завдання за критеріями мінімуму часу та максимуму вірогідності успішності його виконання. Обґрунтовано, що у військово-прикладній сфері виникає необхідність застосування БПЛА у зімкнутих бойових порядках (необхідність прольоту заданої точки простору за мінімальний час, наявність вузьких коридорів для прольоту групою БПЛА тощо), коли відстань між учасниками групи вимірюється в одиницях метрів. У статті проаналізовано існуючі методи оцінки ймовірності зіткнення БПЛА. Запропоновано метод визначення мінімальної відстані між БПЛА у групі при забезпеченні заданого рівня безпеки за рахунок оцінки ймовірності конфлікту при різних значеннях відстані між БПЛА. Наведено модель навігаційної системи (НС) БПЛА, що складається з інерційної НС та системи глобального позиціювання (GPS), а також визначено середньоквадратичні відхилення (СКВ) результату вимірювання положення БПЛА у просторі. В ході проведення розрахунків визначено, що мінімальна відстань між БПЛА типу PD-1 дорівнює 84,6 м, в той час як при використанні методу міжоб’єктової навігації, що полягає у визначенні відстані між БПЛА за рахунок вимірювання часу проходження сигналу між БПЛА та відносного положення шляхом визначення азимуту та кута схилення за рахунок фазового пеленгування мінімальна відстань дорівнює 3,33 м. Наведена модель не враховує час реакції, що необхідний автопілоту для усунення ситуації небезпечного зближення, можливість потрапляння БПЛА в супутній слід іншого учасника групи, що призведе до зниження керованості, проте може бути застосована для оцінки нижньої границі мінімальної відстані між БПЛА у групі.
MODERN APPROACHES TO TEACHING HAND HYGIENE IN HIGHER MEDICAL EDUCATIONAL INSTITUTIONS
Authors: Filatova V.L. , Lyakhovska A.V. , Filatova O.V. , Matvienko T.M. , Sargosh O.D. , Lyakhovskyi V.I. 
Published: May 2023

Compliance with hand hygiene principles is crucial in preventing infections associated with medical care, both in pre-hospital settings and medical institutions. Inadequate knowledge of hand hygiene can lead to poor compliance with preventive measures, resulting in an increased risk of hospital-acquired infections and complications for patients. The acquisition of knowledge on hygiene, particularly hand hygiene, by students at higher medical education institutions is always an important issue.
Junior students in higher medical education institutions may lack theoretical knowledge and practical skills in hygiene, especially in preventing the transmission of infectious diseases. Since students frequently visit medical institutions and hospitals, a lack of hygiene knowledge among them can increase the spread of infections. Therefore, increasing the level of knowledge on this issue is essential, with a focus on the importance of hygiene in hospitals and its impact on patient safety. Improving knowledge of personal hygiene rules, particularly hand hygiene, among students during clinical training is critical to reducing the spread of nosocomial infections.
In teaching hygiene, particular attention should be paid to the "Instructions for the Implementation of Improving Hand Hygiene in Healthcare Facilities and Institutions/Institutions Providing Social Services/Social Protection of the Population." A trained and experienced medical instructor plays a significant role in imparting such knowledge, using different teaching methods in accordance with their acquired skills. Educational programs in hygiene and clinical disciplines should be improved, with the latest modern guidelines included to prevent the spread of infection in healthcare facilities and develop a sense of personal responsibility among students for compliance with hygiene rules
THE IMPACT OF ORTHODONTIC TREATMENT ON THE PERIODONTAL STATUS OF PATIENTS
Authors: Bumbar Z.O. , Sichkoriz Kh.A. , Slaba O.M. , Minko L.Yu. , Manuylyk B.I. 
Published: May 2023

Today, the frequency of dental and jaw anomalies and the need for their correction is extremely high. Orthodontic treatment has a direct impact on the state of the apparatus that supports and retains the teeth; this requires timely detection of periodontal diseases and their therapy in order to save the teeth and successfully correct the bite.
The purpose of this work is to review and analyze modern professional literature on the impact of orthodontic treatment of maxillofacial anomalies on the periodontal status of patients, in particular pathogenetic mechanisms of the development of periodontal diseases and features of their clinical course in this category of patients.
The study has demonstrated the use of various types of orthodontic appliances for the treatment of maxillofacial anomalies is accompanied by the deterioration of hygienic status, a decrease in the local immune response, dysbiotic changes in periodontal tissues, hemodynamic and microcirculatory disorders and loss of bone tissue. This causes the rapid development and progression of inflammatory diseases of periodontal tissues such as catarrhal and hypertrophic gingivitis, as well as generalized periodontitis in young and working-age individuals. Therefore, the analysis of this problem is relevant and necessary for deeper understanding of the pathogenesis of the development of this pathology in persons having orthodontic treatment, for its timely diagnosis and prevention.
The in-depth analysis of scientific literature on the issue enables to systematize and understand the main pathogenetic mechanisms of the development of periodontal diseases in patients during orthodontic treatment. Both the negative multi-vector effect of orthodontic appliances on the periodontal status of patients due to the deterioration of hygienic indicators and the increase of microbial contamination in the early stages of treatment, as well as the positive role in stabilizing the state of supporting tissues in the long term, were noted.
MATHEMATICAL ANALYSIS OF FRONTAL AREA BITE HEIGHT SEPARATION USING DENTAL SCANNER INDICATORS IN LOCALIZED PATHOLOGICAL TOOTH WEAR
Authors: Koval Y.P. , Petrenko R.V. , Pavlish I.V. 
Published: May 2023

The issue of occlusion changes resulting from tooth loss or wear requires prompt early identification and effective resolution. Alterations in the physiological position of the lower jaw can have cascading effects on facial muscles, articulation, chewing biomechanics, and patient’s aesthetics and comfort. It also poses challenges for orthodontic procedures. Correcting occlusion height is a significant concern for both patients and dental specialists, necessitating the use of appropriate techniques and informed decision-making.
This review aims to examine primary literature sources concerning the causes and consequences of pathological tooth wear, its impact on bite changes in patients, and the relevance of mathematical calculations in orthodontic interventions.
An electronic search and analysis of publications from prominent scientific databases (ScienceDirect, Research Gate, NCBI, PubMed, Ovid MEDLINE, Willey, Web of Science, EBSCO, Scopus, Google Scholar) were conducted. Emphasis was given to articles published after 2018. The presence of additional informative references in the analyzed text materials was also assessed.
Mathematical equation models were identified as useful tools for quantitatively assessing temporomandibular joint movement during the restoration of the initial occlusion height. Such calculations are most effective in the early stages of orthodontic intervention, particularly when temporomandibular joint mobility is limited. However, it is crucial for dental specialists to approach each orthodontic procedure with precision and rationale, considering the existing temporomandibular structure. The accuracy of the method can be evaluated by calculating the proportion of true positives and true negatives in all assessed cases. While mathematical calculations can provide general guidelines, individual patient criteria should remain the primary consideration for the specialist.
CHARACTERISTICS OF THE EPIDEMIOLOGICAL SITUATION IN AREAS OF MILITARY CONFLICTS AND ANTHROPOGENIC DISASTERS
Authors: Mohylnyk A. , Tarasenko K. , Sonnik Ye. , Adamchuk N. , Arkhipovets O. 
Published: May 2023

This article presents an overview of the characteristics pointing out the deterioration of the epidemiological situation during military conflicts and anthropogenic disasters drawing form the latest literature. There are particular conditions that can provoke emergencies, among them military conflicts, natural disasters, humanitarian crises, man-made disasters, the use of biological weapons, particularly within the context of the Russian military invasion of Ukraine. The emergency conditions according to the principles of the sanitary and epidemiological service involve sudden and often unpredictable disruptions to normal everyday circumstances. These disruptions stem from disasters, natural calamities, and their aftermath, resulting in significant human casualties and widespread illness.
The most important factors affecting the development of epidemiological circumstances include violations of the water supply system, contamination of food products, washing away various chemicals into water bodies, flooding of natural biocenoses, crowding, stress, increased sensitivity to infections, intensive migration processes. The complete or partial destruction of the material and technical base of health care and the sanitary-epidemiological service with disruption of the activities of medical and preventive institutions in the occupied territories also significantly affects the epidemiological situation. Given the eastern and southern regions in Ukraine, the emergency situation with severe epidemic complications has been observed for a year in the cities and villages occupied by Russians. As a result of serious violations of living conditions in disaster areas, war zones, and occupied territories, the epidemic situation regarding intestinal infections, including typhoid, paratyphoid, viral hepatitis, dysentery, and salmonellosis, has sharply worsened. Moreover, the increase in the incidence of them occurs in the first weeks after the action of the extreme factor. Crowding of people contributes to the intensification of aerosol contamination. Particularly dangerous in this regard are meningococcal disease, viral pneumonia, diphtheria and other contagious diseases. In addition, the high risk of critical deterioration of the epidemiological situation in Ukraine causes a high probability of the use of chemical and biological weapons by russians.
SOME PATHOMORPHOLOGICAL FEATURES OF GERM CELL TUMORS OF TESTICLE
Authors: Babenko V.I. , Nikolenko D.Ye. , Fylenko B.M. 
Published: May 2023

Objective: This study aims at identifying the main individual clinical and morphological features of germ cell testicular tumours through a detailed pathomorphological analysis of biopsy and postoperative material.
Materials and Methods: The study involved the examination and analysis of archival biopsy and post- operative material of testicular cancer cases in Poltava and the Poltava region between 2018 and 2022. The samples were obtained from the Poltava Regional Pathology Bureau. Histological preparations were made using standard methods, stained with haematoxylin and eosin, and subjected to microscopic examination.
Results: A total of 22 cases of testicular cancer were registered in the Poltava Regional Pathology Bureau between 2018 and 2022. The average age of men diagnosed with these tumours was 43.6±14.9 years. The study identified different types of germ cell testicular tumours, including typical seminoma, spermatocytic seminoma, embryonal cancer, and mixed germinative tumours (combinations of spermatocytic seminoma, embryonal cancer, and teratoma; combinations of typical seminoma and embryonal cancer; combinations of embryonal cancer and teratoma). Microscopic examination revealed histological features specific to each of these tumour types.
Conclusions: Among germ cell tumours of the testicles in the Poltava region over the past 5 years, typical seminoma was the most frequently detected type, an average age of patients with the diagnosis is 50 years. The youngest patient diagnosed with testicular cancer was 21 years old, who had embryonal cancer. Germ cell testicular tumours have a heterogeneous structure, posing challenges in making pathomorphological di- agnoses. However, detailed microscopic examination enables the verification of the histological type of the tumour and identification of individual features of germinogenic neoplasias.
ELECTRON MICROSCOPIC CHANGES OF PERITUBULAR MACROPHAGES OF RAT TESTIS UNDER CONDITIONS OF CENTRAL BLOCKAGE OF LUTEINIZING HORMONE SYNTHESIS BY TRIPTORELLIN DURING 90 DAYS OF OBSERVATION.
Authors: Stetsuk E.V. , Shepitko V.I. , Boruta N.V. , Pelypenko L.B. , Voloshina O.V. 
Published: May 2023

Introduction. Macrophages are cells of the innate immune system that play many roles in the body. Macrophages are known to be found in endocrine glands, and there is now much evidence that these cells interact closely with endocrine cells. Immune-endocrine interactions are important for the development of endocrine glands and their functioning during physiological states, and also become key players in pathophysiological states. Through gene expression profiling, diverse subpopulations of tissue macrophages have been identified in endocrine organs; this has important implications for disease pathogenesis and potential pharmacotherapy. The molecular basis of the relationship between macrophages and endocrine cells is being revealed, allowing the identification of numerous points for pharmacological intervention. Macrophages are the main immune cells of the testis, but their origin, heterogeneity, and development have not been sufficiently studied.
Object and methods. The study was conducted on 20 adult male rats. Animals were randomly divided into 2 groups: control (10 animals) and intact (10 animals). Animals of the control group were injected with physiological solution in a dose of 0.3 ml. Preparation of material for electron microscopic examination of the structures of the interstitial space of the testis was carried out according to the generally accepted method.
Results and discussion. We identified two populations of macrophages located in the interstitial space of the testes, considering their location and functional capacity. The results of our research showed that under the influence of central blocking of LH synthesis, the morphogenesis of antigen-presenting cells of the interstitial space of the testis, namely macrophages, occurs. These modifications indicate an inversion of their polarization, which, in turn, leads to a microscopic reorganization of cells, in particular their activation (M1) to perform certain functional activities in the organ.
Conclusions. In the early stages of central blocking of LH synthesis, metabolic and functional disorders were detected in the parenchyma and stroma of the organ, which led to signs of ultrastructural and functional stress, which manifested itself in a quantitative shift of the macrophage population in the direction of an increase in peritubular macrophages.
THE ROLE OF PRACTICAL MEDICAL TRAINING IN THE EDUCATION SYSTEM FOR MEDICAL STUDENTS
Authors: Horodova-Andreeva T. V. , Liakhovskyi V. I. , Nemchenko I. I. , Lysenko R. B. , Krasnov O. H. , Lyulka O. M. , Sydorenko A. V. 
Published: May 2023

The training of healthcare professionals must include practical training when they can interact with patients and apply the latest techniques to develop clinical thinking and ethical principles. To ensure the quality of education and the development of the healthcare system as a whole, it is crucial to enable medical students to deepen their skills at various specialized departments. However, one of the problems is the lack of practice and opportunities for independent work in real conditions that can lessen the quality of training outcomes and complicate young doctors’ adaptation to professional activities and environment.
The primary objective of clinical practice is to develop professional skills and competencies, such as gathering and analyzing medical information, identifying necessary laboratory and instrumental tests, and evaluating their results. Practical skills, including diagnosing, preventing, and treating illnesses, working with medical documentation, and evaluating the impact of determinants on health status, are also taught. Engagement in carrying out sanitary, hygienic and preventive measures, while considering social and ethical aspects, is equally important. Medical students have practical training in hospitals and clinics across various fields of medicine. For example, they learn to manage physiological pregnancy and take delivery at obstetric or maternity departments, to assess the child development and provide preventive vaccinations in paediatric clinics, as well as to handle emergency medical care in extraordinary situations and military operations.
Modern digital technologies and programs, such as e-books, video lessons, and online courses, have made learning more efficient. However, it is still important for students to develop teamwork and leadership skills and proficiency in both Ukrainian and English.
By engaging in practical training, medical students can avoid professional mistakes and provide highquality medical care for patients.
Implementasi Opencv Face Recognition Pada Sistem Presensi Karyawan Koperasi Simpan Pinjam
Authors: Zulkifli Zulkifli , Pawelloi Andi Irmayani 
Published: May 2023

Face recognition adalah sebuah cara menganalisasikan dan mengekstraksi daerah wajah yang bertujuan untuk pengenalan wajah. Pengenalan wajah itu sendiri adalah teknologi yang mengidentifikasi identitas atau informasi dari pengenalan wajah. Computer vision merupakan sebuah penemuan dibidang komputer yang digunakan untuk menghasilkan suatu sistem yang mendekati dengan sistem visual manusia pada umumnya. Tujuan dari penelitian ini mengenali wajah manusia dari gambar atau video mengunakan database wajah yang tersimpan sehingga pengenalan wajah sendiri dapat dilakukan dengan cara proses pendeteksian. Hasil dari penelitian menunjukan bahwa aplikasi pengenalan wajah dengan mengunakan Metode Convolutional Neural Network. Penelitian ini mengunakan teknologi OpenCV yang menyediakan banyak librarry. Librarry OpenCV mendukung perangkat lunak komputer salah satunya yaitu python. Hasil dari penelitian ini adalah cahaya dan pose dalam melakukan pengenalan absensi berpengaruh terhadap hasil yaitu dapat menimbulkan kesalahan pada pengenalan atau wajah tidak dikenali sama sekali dan mampu menampilkan informasi nama karyawan pada saat melakukan absensi serta mampu mengenali lebih dari satu wajah pada saat melakukan absensi karyawan, dan jarak maksimal pada saat melakukan absensi yaitu 200 cm, pada jarak 250 cm sistem akan menampilkan wajah tidak dikenali.