bluuebunny/crossref_metadata_2025 huggingface dataset:
CLINICAL AND RADIOGRAPHIC EVALUATION OF NANOHYDROXYAPATITE AND PLATELETS-RICH FIBRIN AS PULPOTOMY MATERIALS FOR PRIMARY MOLARS
Authors: Ahmed Ahmed Abd El-Azim Sherif , Youssef El Baiomy Samy , Farouk Barakat Ibrahim
Published: January 2023

Objectives: Pulpotomy works to retain a healthy tooth in the mouth till exfoliation by protecting the radicular pulp. The coronal pulp must be removed, and the radicular pulp must be given medication, in order to maintain the tooths health and function. Subject and Methods: The children who took part in this clinical investigation were chosen aged 4 to 8 years old, following approval from the Ethical Committee and obtaining signed informed consent from their parents. Based on the type of pulpotomy material used, the NHAp group and the PRF group, and 40 mandibular primary teeth that needed pulpotomy treatment were split into two groups (n=20). The split-mouth prospective clinical trial design for this study was authorized. Three distinct follow-up intervals of 6 weeks, six, and twelve months were used to note and evaluate the clinical and radiological outcomes. Results: The teeth treated with PRF had improved clinical and radiographic outcomes at the three distinct follow-up intervals of 6 weeks, 6, and 12 months, but there was no statistically significant difference between them and the teeth treated with NHAp. Conclusion: The results of the pulpotomized primary molars clinical and radiographic outcomes could be improved by using PRF as a pulp dressing agent.
IMPACTS OF CORONAVIRUS (COVID-19) PANDEMIC ON MEDICAL EDUCATION AT THE NORTHERN BORDER UNIVERSITY
Authors:   Department of Family & Community Medicine, Faculty of Medicine, Northern Border University, KSA & Department of Public Health and Community Medicine, Faculty of Medicine, Benha University, Egypt., E. Bayomy Hanaa , Hamad F. Alanazi Ghaida ,   Faculty of Medicine, Northern Border University, KSA., Hamad F. Alanazi Maisa ,   Faculty of Medicine, Northern Border University, KSA., Abdulrahman S. Aloufi Fadiyah ,   Faculty of Medicine, Northern Border University, KSA., Abbas Q. Alanezi Reem ,   Faculty of Medicine, Northern Border University, KSA., Abdulrahman S. Aloufi Nadyiah ,   Faculty of Medicine, Northern Border University, KSA., Naif A. Alanazi Nada ,   Faculty of Medicine, Northern Border University, KSA., Walid Z. Bhkaly Rawan ,   Faculty of Medicine, Vision College of Medicine., Farhan A. Alanazi Afnan ,   Faculty of Medicine, Northern Border University, KSA.
Published: January 2023

Introduction: The COVID-19 pandemic has affected all aspects of our lives, including education, social relations, and psychological and financial status. Objectives: The study aims to assess the effects of the COVID-19 pandemic on academic performance, hygiene, stress, lifestyle, and financial status among medical students at Northern Border University (NBU), Saudi Arabia. Methods:This cross-sectional study was conducted on medical students at NBU, Arar City. The study collected data on socio-demographic characteristics, academic, hygiene, psychological, lifestyle, and financial impacts of the COVID-19 pandemic among medical students. Results:The study surveyed 332 medical students at the NBU (response rate=86.46%). One-third of students reported deteriorating academic performance during the pandemic. Negative effects of COVID-19 on academic performance were more likely among males, older students, in clinical years, with poor IT skills, and those who had not previously participated in online learning. Over 56% of students reported negative effects on their academic grades and GPA due to the pandemic and over 50% agreed that teachers were not technology-friendly, recorded lectures were better than live lectures, and technical issues interfered with online teaching. Most students reported increased awareness of hygiene and sanitization with the MOH and WHO being the most frequent sources of information (34.94% and 28.92%, respectively). Conclusion: The COVID-19 pandemic has had impacts on medical education at the NBU as regards the academic and clinical skills and physical and psychological health of medical students. This study drew attention to the needs and resources to address challenges faced by medical students during the pandemic.
MENDES DA COSTA SYNDROME MASQUERADING AS PSORIASIS VULGARIS- A CASE REPORT
Authors:   Narayana Medical College and Hospital, Nellore., Sahithi Sindhu V. , Mounika S. ,   Narayana Medical College and Hospital, Nellore., Chakravarthy N. ,   Narayana Medical College and Hospital, Nellore., Vijaya Mohan Rao A. ,   Narayana Medical College and Hospital, Nellore.
Published: January 2023

Erythokeratodermavariabilis(EKV) is rareAutosomal dominantdisease with two types of presentations.Onset is usually in infancy. Two types of lesions: 1) Relatively fixed well demarcated keratotic and erythematous plaquesover extensor surfaces. 2) Transient erythematous, polycyclic or comma shaped macular lesions occurring at any site. We arereportingmale patient presenting withasymptomatic hyperkeratotic plaques over extensors,withoutseasonal variationsand withoutpositivefamily historybut clinically mimicking as psoriasis vulgaris.
PROTECTION TO THE RIGHS OF VICTIMS OF CRIME UNDER INTERNATIONAL LAW
Authors:   Associate Professor, NALSAR University of Law, Hyderabad, Telangana State., Santhy K. V.K
Published: January 2023

The courts of criminal jurisdiction at the national and international levels in the past did not bestow much attention on the rights of the victims rather they concentrated more on matters relating to the proof of guilt of the accused and less on matters relating to the sufferings of the victims. With regard to very few aspects of the criminal case the participation or association of the victim with the proceedings at any stage was relevant. But in modern International Law, the victim is given due attention with regard to his right to life, liberty and safety as also his right to compensation and the relevant bodies are supposed to provide protection to the victim to avail several of his rights. Drawing inspiration from the international legislation, the legal systems at the national level have adopted necessary legislation to enforce the policy of the United Nations with regard to protection of the victims. The development of Human Right Law and Environment Law have of course given a new boost to the concept of rights of the victims. However, there are certain legal impediments on account of which the victims cannot get the protection envisaged in the modern legislation. Among such impediments are the limited scope of the concept of victim and a limitation on the jurisdiction of the courts in the form of immunity of United Nations from national jurisdiction in civil and criminal matters. On a review of the relevant documents one is forced to draw the conclusion that the provisions of law which by one hand give a gift of protective device take away by another hand the very protection envisaged to the rights of victims in civil and criminal matters.
VERNACULAR ARCHITECTURE AND SUSTAINABILITY
Authors:   Associate Professor, CITAD, LusiadaUniversity, Portugal., Patricia D. , Manuel D. ,   Full Professor, CEPESE, Portugal.
Published: January 2023

This research project implies the participation in the reflectionof the issue of vernacular architecture, systems of representation, international charters and conventions, recovery systems linked to recovery and asset protection, in order to disseminate and collect scientific knowledge that contributes to value and mobilize their development process in our study area in Matosinhos Municipality.
KNOWLEDGE, ATTITUDE AND PRACTICE REGARDING FIBROMYALGIA AMONG PRIMARY CARE PHYSICIANS IN TABUK, SAUDI ARABIA
Authors:   Department of Family and Community Medicine, Faculty of Medicine, University of Tabuk, Tabuk, Saudi Arabia., M. Alatawi Amirah , A. Moria Hassan ,   Department of Surgery, Faculty of Medicine, University of Tabuk, Tabuk, Saudi Arabia., Arshed N. Alharfy Abdulrahman ,   Medical Intern, Faculty of Medicine, University of Tabuk, Tabuk, Saudi Arabia., Talal A. Alotaibi Jalawi ,   Medical Intern, Faculty of Medicine, University of Tabuk, Tabuk, Saudi Arabia., Jameel Sehly Mohammed ,   Medical Intern, Faculty of Medicine, University of Tabuk, Tabuk, Saudi Arabia., Salem Alshammari Yousef ,   Medical Intern, Faculty of Medicine, University of Tabuk, Tabuk, Saudi Arabia., Oudah A. Albalawi Abdulrahim ,   Medical Intern, Faculty of Medicine, University of Tabuk, Tabuk, Saudi Arabia., Marzoug Alanazi Saif ,   Medical Intern, Faculty of Medicine, University of Tabuk, Tabuk, Saudi Arabia., Jameel Sehly Abdulrahman ,   Medical Intern, Faculty of Medicine, University of Tabuk, Tabuk, Saudi Arabia.
Published: January 2023

Background: Adequately informed family physicians have the greatest potential to correctly identify the diagnosis of fibromyalgia (FM) and develop an initial treatment plan. Therefore, it is substantial to determine the levels of weakness and inaccuracies of primary care physicians regarding FM diagnostic criteria and management strategies. Aim: This study aimed to assess the knowledge, attitude, and practices regarding FM among primary care physicians in Tabuk, Saudi Arabia. Methods:This cross-sectional study included family physicians who were board-certified or registered in the family medicine training program and working at the government family health care centers in Tabuk. A pre-designed, structured questionnaire was distributed either in a written form or as an online survey. Results: This study included 52 primary healthcare physicians. Twenty-two (42.3%) participants incorrectly recorded localized pain as a diagnostic symptom, and 45 (86.5%) incorrectly recorded nonsteroidal anti-inflammatory drugs, prednisolone, and/or opioids as drugs that are used for treating FM. Only 59.6% were confident recognizing symptoms of FM and 55.8% were confident differentiating FM from other similar diseases. Conclusions: The primary healthcare physicians working in the governments primary healthcare centers in Tabuk city, Saudi Arabia have low levels of knowledge about diagnostic criteria and treatment strategies of FM. These findings highlight the need for continuous professional development involving family physicians in the primary health care setting with suitable continuous medical education programs concerning FM.
REARING PERFORMANCE OF ERI SILKWORM (PHILOSAMIA RICINI) FROM WARANA HILLY REGION AREA, KOLHAPUR, MAHARASHTRA
Authors:   Department of Zoology, Y.C.W. Mahavidyalaya., Warnanagar., R.P. Kavane
Published: January 2023

An attempt was made to rear the eri silkworm, Philosamia ricini on the leaves of caster and reared under laboratory condition. It was observed that the caster is a primary potential host of eri silkworm. The growth parameters and cocoon characters of the eri silkworm reared on caster leaves were normal. The eri silkworm successfully lasted its life cycle ranged from 38 to 40 days. The effective rate of rearing, weight of pre-spinning larvae, cocoon, shell and pupae ranged from 70 to 75 per cent, 6 to 7 g, 3.01 to 3.05 g, 0.40 to 0.45g, 2.50 to 2.70g, respectively. Parameters such as length of cocoon shell, width of shell, shell thickness etc. The fecundity ranged from 400 to 425 eggs. Rearing performance of eri silkworm is a need in western Maharashtra for a future development of raw silk production.
BAĞLANTILI OYUNCAKLAR ÖZELİNDE ÇOCUĞUN KİŞİSEL VERİLERİNİN CEZAİ VE HUKUKİ OLARAK KORUNMASI
Authors: ÖZTÜRK Nurten , GÜRBÜZ Elif Rumeysa
Published: January 2023

Bilimsel ve teknolojik gelişmeler hayatın her alanında değişiklik ve yenilikleri de beraberinde getirmektedir. İnternet üzerinden ilişkilendirilen nesnelerin bir türü olan ve Wi-Fi, bluetooth veya hücresel ağlar gibi aracılarla internete bağlanan bağlantılı oyuncaklar da günümüz dünyasında çocukların yeni nesil oyuncakları haline gelmiştir. Eğlence, eğitim ve sağlık gibi pek çok alanda ve farklı amaçlarla kullanılan bu tür oyuncaklar, kişisel verilerin korunması hususunda da ayrı bir öneme sahiptir. Nitekim bu tür oyuncaklar çocuk, ebeveyn ve üçüncü kişilerin kişisel verisine ulaşabilecek niteliktedir. Kişisel verilerin korunması hususu, hukukun farklı alanlarının kesişim noktasında bulunmaktadır. Bu kapsamda gerek uluslararası hukuk belgelerinde gerekse iç hukukta farklı düzenlemelerle kişisel verilerin korunması amaçlanmaktadır. Bu nedenle Avrupa Konseyi ve Avrupa Birliği belgeleri ile birlikte iç hukuktaki durumun incelenmesi gerekmektedir. Çalışmada bağlantılı oyuncaklar özelinde çocuğun kişisel verilerine yönelik tehlikeler ve bundan korunma bakımından ulusal ve uluslararası düzenlemeler ele alınacaktır. Kişisel verilerin korunmasında rıza kavramı özel bir öneme sahiptir. Bu nedenle rızayı ayrıca ve çocuklar özelinde ele alan “Avrupa Birliği Genel Veri Koruma Tüzüğü” ile Türk hukukunda rıza hususu karşılaştırmalı olarak incelenecektir.
A publicação Educação em Revista e o empreendedorismo
Authors: Mocellin Petrini Silvane Gema , Wanderer Fernanda
Published: January 2023

O artigo é resultado de uma pesquisa que teve por objetivo evidenciar as marcas que uma revista direcionada aos professores e gestores de escolas privadas do Rio Grande do Sul (RS) atribui aos estudantes envolvidos nas atividades ligadas ao empreendedorismo. Os aportes teóricos vinculam-se às teorizações de Michel Foucault e de seus revisores. O material empírico consiste em exemplares da Educação em Revista (ER), uma publicação do Sindicato do Ensino Privado do Rio Grande do Sul (SINEPE/RS), publicados entre 2013 e 2021. Em termos metodológicos, utilizou-se a análise do discurso proposta por Foucault. A análise do material evidenciou que há um forte apelo na Educação em Revista para que as escolas privadas do RS trabalhem com o empreendedorismo. Além disso, percebeu-se que as reportagens posicionam os estudantes como protagonistas e líderes em processos de individualização e singularização dos aprendentes quando envolvidos em práticas empreendedoras, as quais configuram um sujeito-aluno narcisista, que passa a ser edificado como um herói que, dentre outras marcas, explora a si mesmo.
gênesis ficcional de Lobato
Authors: Hey Vanessa
Published: January 2023

O conto “Era no Paraíso...” (1923), de Monteiro Lobato, se constrói como uma paródia do Gênesis bíblico. Influenciado pela teoria darwiniana, o narrador nos mostra o desenvolvimento dos seres, em especial, do ser humano, como um “descender com modificações”, que explica o seu comportamento frente às questões da vida e, por conseguinte, da natureza. No conto, a reação da natureza, que somente ocorre como projeção no futuro, está intimamente ligada às ações humanas; aquilo que antes era representado de forma harmoniosa transforma-se drasticamente, graças ao chamado ‘progresso’ da humanidade, em um cenário apocalíptico. Dialogando com textos de Darwin e Benjamin, a presente leitura privilegia a análise da forma como o texto lobatiano representa a natureza, adotando, nessa investigação, um viés ecocrítico.
Dochody miesięczne jako czynnik wpływający na jakość życia polskiej rodziny na przykładzie woj. podkarpackiego
Authors: Zawada Piotr
Published: January 2023

Wielkość dochodu rodzinnego jest czynnikiem warunkującym wielkość oraz strukturę spożycia. Jest on także determinantem zachowania rodziny, bowiem umożliwia zaspokojenie podstawowych potrzeb człowieka i jest istotnym elementem poziomu życia. Dochody wpływają także na relacje między małżonkami, rodzicami i dziećmi. Budżet domowy generuje również rozwój i edukację dzieci, daje bądź ogranicza im możliwości na przyszłość. Trudna sytuacja materialna polskich rodzin rodzi ograniczenia podstawowych potrzeb konsumpcyjnych.
Komunikacja międzykonfesyjna w świetle Mowy duchownej… (1645) Piotra Mohyły
Authors: Melnyk Marek
Published: January 2023

Koncepcja komunikacji konfesyjnej zawarta w Mowie duchownej… Mohyły była zbudowana na neoplatońskiej – gradualistycznej koncepcji świata. Możliwe, że wynikała z tego wizja jedności chrześcijaństwa. Jest ono w prawdzie rozbite na poszczególne i przy tym zantagonizowane i pozornie niczym niepowiązane Kościoły, lecz w rzeczywistości tworzą one ontologiczną jedność zgodną z transcendentnym, gradualistycznym ładem podtrzymywanym przez Boga. Małżeństwo jawił się Mohyle jako możliwość pojednania różnic konfesyjnych oraz jako szczególny przejaw ontologicznej harmonii między Bogiem i ludźmi. Mowa… jest dowodem na to, że dezintegracji jedności religijnej na ziemiach ruskich Rzeczypospolitej towarzyszyły próby jej scalenia. Był to proces określający ewangelicko-prawosławną komunikację kulturową.
„Gratulemur in honore” – endemiczne oficjum o św. Katarzynie Aleksandryjskiej
Authors: Grajewski Czesław
Published: January 2023

Autor analizuje oficjum „Gratulemur in honore” o św. Katarzynie z Aleksandrii. Wykazuje, że jest to dzieło endemiczne, które powstało w XIII w. w Liège lub okolicach, nie zdołało jednak rozprzestrzenić się w Europie. W Polsce jedynym kodeksem, który zawiera to oficjum (niepełne), jest „Pontificale Plocense”, powstałe prawdopodobnie także w Liège, które już w XIII w. znalazło się w Polsce. Księgi liturgiczne używane w diecezji płockiej (XV i XVI w.) zawierają jedną antyfonę z oficjum „Gratulemur”.
Arcybiskup Antoni Baraniak jako członek Episkopatu Polski, cz. II (1967-1977)
Authors: Łatka Rafał Maciej
Published: January 2023

Poniższy artykuł opisuje rolę abp. Antoniego Baraniaka w Episkopacie Polski w ostatniej dekadzie życia metropolity poznańskiego. Jest kontynuacją analizy opublikowanej w 2019 r. na łamach „Seminare”. Mimo upływu wielu lat od śmierci niezłomnego biskupa nie doczekał się on swojej pełnej biografii. Tekst ma wypełnić ten brak w zakresie aktywności wśród polskich biskupów w latach 1967-1977. Metropolita poznański dał się poznać jako wybitna postać w pracach na forum Komisji/Rady Głównej oraz Konferencji Plenarnej Episkopatu. Cieszył się pełnym zaufaniem innych hierarchów i kard. Stefana Wyszyńskiego, którego był jednym z najważniejszych współpracowników. Z Prymasem Tysiąclecia łączyła go wizja działalności Kościoła w realiach komunistycznej dyktatury oraz zdecydowane podejście do polityki wyznaniowej władz PRL. Było to szczególnie widoczne w latach siedemdziesiątych, gdy obaj hierarchowie nie dali się nabrać na złudne deklaracje ekipy partyjnej Edwarda Gierka.
Jak nudzić się umiejętnie? Refleksja na motywach myśli F. Nietschego, E. Ciorana, J. Brodskiego i M. Archer
Authors: Wieczorek Krzysztof
Published: January 2023

Według Nietzschego nuda pojawiła się już w Raju, a walcząc z nią, człowiek odkrył wartość poznania, lecz równocześnie poróżnił się z Bogiem. Myśl Nietzschego kontynuuje Cioran, twierdząc, że źródłem pierwotnej nudy jest niedopasowanie człowieka do świata, w jakim żyje, a skutkiem – strach przed samym sobą. Nudą płaci człowiek za nieumiejętność odnalezienia ostatecznego sensu świata i życia. Wbrew temu jednoznacznie negatywnemu obrazowi nudy, można wskazać także pozytywne jej aspekty. Brodski w eseju Pochwała nudy radzi, by czasem poddać się nudzie i wykorzystać to doświadczenie dla pogłębienia samowiedzy i uchwycenia relacji między świadomością a wymiarem czasu. Autor tekstu rozwija tę ideę. Wykorzystując elementy antropologii filozoficznej realizmu krytycznego M. Archer, proponuje aktywne i konstruktywne podejście do przeżywania stanu znudzenia w perspektywie afirmatywnego, a zarazem krytycznego stosunku do samego siebie.
Ojciec jako jeden z najważniejszych wzorów osobowych w wychowaniu dziecka – rozważania familiologiczne na podstawie dostępnej literatury przedmiotu
Authors: Nosek-Kozłowska Katarzyna
Published: January 2023

Celem artykułu jest zaprezentowanie roli ojca w wychowaniu dziecka. Teoretyczny namysł obejmuje charakterystykę wychowania rodzinnego, przedstawia problematykę nowego ojcostwa oraz ukazuje ojca jako jeden z najważniejszych wzorów w wychowaniu dziecka. Na podstawie opracowań naukowych wskazano najważniejsze cechy środowiska wychowawczego rodziny, a także ukazano specyfikę roli ojca w wychowaniu dziecka. Refleksja nad podjętą problematyką wskazuje, iż obecność ojca okazuje się być niezbędna w procesie kształtowania się młodego człowieka, w procesie wzrastania dziecka w świat wartości i świat życia społecznego. Ojciec okazuje się być jednym z największych autorytetów w życiu dziecka.
Wychowawcza rola rodziny w perspektywie Starego Testamentu
Authors: Niewęgłowski Jan
Published: January 2023

Każdemu człowiekowi towarzyszy wychowanie. Proces ten rozpoczyna się już w dzieciństwie i trwa poprzez długie lata czasu młodzieńczego. Znaczący wpływ na model wychowania mają takie mechanizmy jak polityka, ekonomia, kultura, szkolnictwo, tradycja. W pracy z młodym człowiekiem osoby odpowiedzialne przekazują mu wiedzę, doświadczenie, kulturę i szeroko rozumiany świat wartości. Rodzice i inne osoby zaangażowane w proces wychowania muszą dokonywać ciągłych wyborów w zakresie szerokiej oferty modeli wychowawczych. Jedną z propozycji wychowawczych może być nauka na temat rodziny zawarta w Biblii.
Paradoksy sarmatyzmu. Obyczaj – polityka – ikonografia
Authors: Mrozowski Przemysław
Published: January 2023

Źródeł sarmatyzmu upatrywano w legendach historiograficznych wywodzących szlachtę polską od starożytnych Sarmatów. Samo zjawisko miało być wynikiem oddziaływania kultury Orientu. Nie tłumaczy to jednak jego istoty. Sarmatyzm nie wyrastał z fascynacji kulturą Wschodu, ale z kontestacji Zachodu. Było to w końcu XVI stulecia wyrazem przekonania szlachty o doskonałości polskiego ustroju gwarantującego jej wolność i przywileje. Poczucie odrębności wyraziło się wówczas orientalizacją ubiorów szlacheckich, które stały się znakiem tożsamości narodowej, co uwidaczniają źródła ikonograficzne.
Ecclesiality and Human Socialization in the Aspect of Applied Theology
Authors: Przybyłowski Jan Kazimierz
Published: January 2023

Applied theology is the scientific reflection on the daily “growth” of man, who lives every day in the world and there fulfils himself and realizes his existential vocation, and Christians build the Kingdom of God. From the perspective of applied theology, three main principles can be distinguished that link ecclesiology and socialization: respect for truth, social justice and charity. In applied theology, it is possible to undertake scientific reflection on ecclesiology without violating pastoral theology's right to study the Church and its salvific mission. However, in the search for knowledge about the dimensions of human social life, authoritarian and abstract universalism should be avoided.
The Church in the Face of the Challenges of the Post-Pandemic Era
Authors: Wyszowadzki Władysław
Published: January 2023

The purpose of the research is to analyze the situation of the Church and pastoral care in the post-pandemic reality. The experience of the 2020-2022 period shows that there has been a strengthening of the faith attitudes of Catholics actively participating in the life of the Church. At the same time, the weaker sides of pastoral care, resulting from a confrontation with the media world, have shown themselves. This calls for using the experience of people of science, medicine, bioethics, and psychology in the pastoral model. Pastoral activity should also value sacramental pastoral care with the Eucharist at the center. New challenges also face pastoral theology, whose research results can be used to seek new ways of carrying out salvific mission and evangelization.
Educational Chances of Children with Disabilities in the Republic of Namibia
Authors: Kaniok Przemysław Eugeniusz
Published: January 2023

The main aim of this paper is to present the current situation of children with disabilities in the Republic of Namibia, with special regard to their educational chances and influence of cultural beliefs on their lives. Namibia has a law, which entitles education for all its citizens. Despite numerous legislative acts which should have increased the educational chances of Namibian children with disabilities, their real situation is completely different and depends on various factors, including the infrastructure of the schools, teacher competencies, their attitudes towards students, the small number of special and integrated schools as well as an insufficient amount of money transferred for the education of the children. The paper discusses all of the above factors and provides practical implications, which would improve the situation of children with disabilities in Namibia.
Spectral study of the protonation of photochromic chromenes in polymeric matrices
Authors: Venidiktova O. V.  , Kobeleva o. I.  , Gorelik A. M.  , Barachevsky V A
Published: January 2023

For the first time, proton complexes of the photoinduced colored form of chromene have been obtained in polymer binders. It is shown that UV irradiation of photochromic chromene leads to spectral changes due to the structure of the compounds and the nature of the polymer binder. Keywords: photochromism, chromene, naphthopyran, polymer matrix, spectroscopy.
A novel method of plasmon coupled optical waveguide for aerosol sensor
Authors: Kumar Sushil  , Sharma Gaurav  , Yadav Gulab Chand  , Singh Vivek  , Singh Abhay Kumar
Published: January 2023

The tropospheric aerosol characterization is important for understanding environmental process as well as human health safety. In this study, the surface plasmon resonance sensor is proposed for the detection of ammonium sulfate which is an important component of aerosols. The reflectivity of proposed sensor waveguides is calculated as a function of the incident angle using the transfer matrix method. The performance of proposed sensors having sol-gel film of tetraethylorthosilane and thymolblue are studied and compared. Firstly, the dispersion characteristics are obtained for different modes, and it is observed that the modes are tightly bound in thymol blue waveguide in comparison to tetraethylorthosilane waveguide. Further, the magnetic field distributions are also studied and compared for proposed waveguide sensor configurations. It is found that the sol-gel film of thymol blue waveguide provides high sensitivity while tetraethylorthosilane waveguide shows high figure of merit. Keywords: aerosol, surface plasmon resonance sensor, reflectivity, sensitivity, detection accuracy.
Focusing capillar and porous X-ray optics
Authors: Lider V. V.
Published: January 2023

The paper discusses the principles and capabilities of X-ray focusing capillar and porous optics. Special attention is paid to polycapillar optics, confocal technique of X-ray fluorescence analysis, as well as wide-angle "lobster eye" optics. Keywords: X-rays, focusing, capillar, porous optics, "lobster eye" optics.
Перенос частоты оптически детектируемого магнитного резонанса и наблюдение эффекта Ханле в ненулевом магнитном поле
Authors: Вершовский А.К. , Петренко М.В.
Published: January 2023

The method of transferring the frequency of an optically detected magnetic resonance both up and down by an arbitrary value is implemented in a single-beam optical pumping scheme by modulating the linearly polarized beam component. The possibility of observing the Hanle resonance in a magnetic field virtually zeroed upon transition to a rotating coordinate system is demonstrated. A model experiment was carried out, confirming the fundamental feasibility and effectiveness of the method.
Диагностика технологии оксидов титана и гафния методами люминесценции
Authors: Булярский С.В. , Гусаров Г.Г. , Дудин А.А. , Коива Д.А. , Литвинова К.И.
Published: January 2023

The article shows the role of oxygen vacancies in the formation of luminescence bands of titanium and hafnium oxides, and also demonstrates the relationship between the intensity of luminescence bands and the conditions for the synthesis of films of these materials. It is concluded that photoluminescence is a very sensitive method for diagnosing the composition of oxides. Luminescence bands at 2.45 eV in titanium oxide and 2.91 eV in hafnium oxide make it possible to analyze the change in the film composition under various technological conditions of their production.
Фазовые эффекты при вынужденном рассеянии Мандельштама-Бриллюэна
Authors: Касумова Р.Дж. , Керимли Н.В. , Сафарова Г.А.
Published: January 2023

In the study of stimulated Brillouin scattering (SBS) in the constant intensity approximation, the spatial behavior of the intensity of the Stokes scattering wave in a medium was investigated. It was found that as a result of nonlinear interaction of waves, the period of spatial beats changes. The intensity of the Stokes scattering component is considered as a function of the phase mismatch, pump and acoustic wave intensities. It is found that the efficiency of the scattering of the backward Stokes wave is affected by the total length of the nonlinear medium. According to the analytical expressions obtained in this work, the choice of the optimal parameters of the problem makes it possible to implement the regime of efficient generation of the Stokes scattering component in SBS. The process of generation and amplification of the Stokes scattering component is compared with experiment. By varying the pump intensity, one can control and manipulate the intensity of the output radiation of the Stokes component.
Исследование когерентного пленения населенности и динамического эффекта Штарка в ансамблях NV-центров в алмазе при комнатной температуре в микроволновом диапазоне
Authors: Ахмеджанов Р.А. , Гущин Л.А. , Зеленский И.В. , Митрофанова Т.Г. , Низов В.А. , Низов Н.А. , Собгайда Д.А.
Published: January 2023

We study coherent population trapping and AC Stark effect using microwave transitions between the sublevels of the ground state of the NV-center. Sublevels with different projections of the nuclear spin of the nitrogen atom are used to implement the Lambda-scheme. Dependence of the characteristics of the coherent population trapping dip on the control field frequency and intensity is studied. Various schemes for observing the AC Stark effect are considered.
Влияние химического состава пористой матрицы и атмосферы спекания на люминесцентные свойства висмутсодержащих композиционных материалов
Authors: Гирсова М.А. , Антропова Т.В. , Головина Г.Ф. , Анфимова И.Н. , Куриленко Л.Н.
Published: January 2023

The spectral-optical and luminescence properties of bismuth-containing composite materials based on matrices of high-silica porous glasses are investigated. Luminescence spectra, luminescence excitation spectra, infrared transmission spectra (8000–4000 cm-1) depending on the composition of different types of matrices and sintering atmosphere (nitrogen, argon) of bismuth-containing composite materials were examined. It was found that the samples of bismuth-containing composite materials are characterized by UV (λem = 350 nm), blue-green (λem = 410–550 nm) and orange-red (λem = 600–725 nm) luminescence due to the presence of various bismuth active centers. The analysis of the spectra obtained by near-infrared spectroscopy demonstrates the formation of Bi2+ dimers of bismuth and bismuth active centers associated with silicon.
Анализ характеристик волноводного устройства для объединения внешних оптических пучков
Authors: Наливайко В.И. , Пономарева М.А.
Published: January 2023

The design of a planar waveguide combiner of light beams, which performs the summation of a set of external light beams, is proposed. Combiner design options are considered and a 3D version with optical decoupling is proposed. The calculations of the operating parameters of the elements of the combiner depending on the values of the refractive indices of the layers of the structure are done. The minimum dimensions of the input/output diffractive elements of the combiner are estimated.
Универсальный перестраиваемый микрорезонатор для исследования взаимодействия света с веществом в ржиме сильной связи
Authors: Мочалов К.Е. , Самохвалов П.С. , Гунько Ю.К.
Published: January 2023

The interaction between an ensemble of molecules and an electromagnetic field in a highly limited volume makes it possible to control the properties of a substance and, therefore, is an exceptionally promising area of research. The most common way to achieve weak or strong light-matter coupling is to place an ensemble of molecules in a micron-sized resonator. In such a system,the interaction of light with matter appears in the form of a change in the spectral response of the system, which depends on the strength of the coupling between the ensemble of molecules and the modes of the resonator. Currently, there is no general and user-friendly approach that allows studying a lot of different samples in a wide optical range using the same resonator setup. The present paper describes the design of a device that makes it possible to overcome this disadvantage, speed up and facilitate the study of the light-matter interaction, and also obtain weak and strong light-matter coupling modes for a large number of samples in the UV, visible, and IR regions of the optical spectrum. The device developed here is based on the tunable unstable λ/2 Fabry-Perot microresonator, consisting of flat and convex mirrors, which satisfy the condition of plane-parallelism at least at one point of the curved mirror and can significantly reduce the mode volume. The device was used to study the effect of the strong-coupling regime on the fluorescent properties of the Rhodamine 6G (R6G) dye embedded in a boron nitride nanoparticles matrix. It was found that the use of boron nitride (h-BN) as a carrier matrix has an orienting effect on the dye molecules, that results in an increase of the light-matter coupling strength at a lower resonator mode energy required.
Кислородные дефекты в одностенных углеродных нанотрубках для источников излучения в ближнем инфракрасном диапазоне
Authors: Ерёмин T.B. , Ерёмина B.A. , Образцова Е.Д.
Published: January 2023

A new peak with an increased intensity was observed in the photoluminescence (PL) spectra of single-walled carbon nanotubes (SWCNTs), exposed to UV irradiation in the presence of sodium hypochlorite. It was concluded on the basis of the spectroscopic data that the new PL peak is associated with oxygen defects in the SWCNT structure. The impact of environmental acidity on the optical properties of oxygen-doped SWCNTs (O-SWNTs) was investigated. An increased sensitivity of the new PL peak to the pH of the medium was observed. It was concluded that the usage of a pH-neutral medium is of crucial importance for the creation of IR light sources based on O-SWNTs.
Technique for investigation of the shape changes of wafers and thin-film membranes by using geomorphometric approaches
Authors: Dedkova A. A.  , Florinsky I. V.  , Djuzhev N. A.
Published: January 2023

We discuss a technique for investigating changes in complex topography and shape of structures using geomorphometric methods to study surfaces of wafers and membranes formed by the Bosch process. The wafers were analyzed before and after the deposition of the SiO2 layer. The membranes were analyzed during the bulge testing. The study was carried out using maps of the catchment area and principal curvatures taking into account artifacts of the approximation of experimental data. We found a correspondence between the distribution of lines connecting the highest surface areas before and after the deposition of the SiO2 layer on the wafers. For membranes with structure: Al(0.8 μm)/SiO2(0.6 μm)/Al(1.1 μm), pSi*(0.8 μm)/SiNx(0.13 μm)/SiO2, Al(0.6 μm) we also found that features of membrane boundaries are mainly caused by their initial shape rather than change under the action of an applied pressure. The advantages of geomorphometric methods for studying changes in the shape of wafers and thin-film membranes in technological processes for the manufacturing of microelectronic devices are shown in comparison with traditional methods for analyzing surface topography maps. Keywords: thin films, membrane, defect, mechanical characteristics, mechanical stresses, deformation, deflection, strain, microelectromechanical systems, MEMS, circular membrane, silicon substrate, optical profilometry, overpressure, geomorphometry, Gaussian curvature, warpage, principal curvatures, wafer, bulge testing, bulging method, thin-layer coating, digital elevation models, DEM, surface, topography.
Local anodic oxidation of silicon for create crossbar architecture
Authors: Polyakova V.V.  , Saenko A.V.
Published: January 2023

Paper present possibility of creation a neuromatrix in the form crossbar architecture on a silicon substrate is shown. Crossbar architecture in the form of a set of nanosized conductors, between which there is a layer of titanium oxide, capable of changing its conductivity under the action of the applied voltage, it is proposed to form using the method of local anodic oxidation. The results is present of the study technological parameters of the method of local anodic oxidation silicon and titanium for the implementation of the elements of this neuromatrix in the form of a memristor structures. Keywords: Silicon, titanium, local anodic oxidation, neuromatrix, crossbar.
Study of the influence of the energy of argon ions on the surface roughness of the main sections of single-crystal silicon
Authors: M.S. Mikhailenko  , A.E. Pestov  , A.K. Chernyshev  , M.V. Zorina  , N.I. Chkhalo  , N.N. Salaschenko
Published: January 2023

The paper presents the results of studying the energy dependences of the sputtering yields and the value of the effective surface roughness of single-crystal silicon upon irradiation with argon ions with an energy of 200-1000 eV. As a result of the work, the parameters of ion-beam etching with accelerated Ar ions were determined, providing a high sputtering yield (etching rate) and an effective roughness value in the spatial frequency range 4.9·10-2-6.3·101 μm-1 less than 0.3 nm for the main cuts monocrystalline silicon <100>, <110> and <111>. Keywords: sputtering yield, roughness, single-crystalline, monocrystalline, accelerated ions.
Model of physical sputtering of amorphous materials
Authors: A.E. Pestov  , M.S. Mikhailenko  , A.K. Chernyshev  , M.V. Zorina  , N.I. Chkhalo
Published: January 2023

The paper demonstrates the pulse mechanism of physical sputtering taking into account the evolution of the surface. The model is based on pulsed energy transfer in collision cascades. The main feature is the consideration of surface roughness. The results of numerical simulation qualitatively coincide with those observed in experiments. It is shown that the angular dependences calculated in the framework of this model have closer values of the sputtering yields to the experimental ones than those calculated in TRIM. Keywords: ion etching, numerical simulation, roughness, Monte Carlo.
Prospects for the use of reactive ion-beam etching of fused quartz with a mixture of tetrafluoromethane and argon for aspherizing the surface of optical elements
Authors: M.S. Mikhailenko  , A.E. Pestov  , A.K. Chernyshev  , A.A. Perekalov  , M.V. Zorina  , N.I. Chkhalo
Published: January 2023

The paper proposes to use the discharge energy for the synthesis of chemically active particles in order to correct the shape and aspherize the surface of optical elements by reactive ion-beam etching. A stand was assembled on the basis of a radio frequency source of accelerated ions KLAN-105M, the design of which allows working with reactive gases. The possibility of increasing the etching rate of fused quartz by more than 5 times compared to ion etching with inert gases by creating a mixture of tetrafluoromethane (CF4) and argon (Ar) in a ratio of 1:1 is shown, while maintaining the initially smooth surface roughness ((sigmaeff~0.3 nm) in the range of spatial frequencies ν[5.0·10-2-6.4·101 μm-1]. Keywords: ion etching, reactive ion etching, roughness, surface, X-ray optics.
Investigation of the real shape changes of round thin-film membranes during the bulge testing
Authors: Dedkova A.A.  , Djuzhev N.A.
Published: January 2023

We discuss the study of the sphericity of the real shape of round thin-film membranes when it changes during the bulge testing. Membrane structures: SiNx/SiO2/SiNx/SiO2, pSi*/SiNx/SiO2, Al, etc. We described the technique for determining the areas of deviation of the membrane surface shape from a spherical one, estimating the magnitude and peculiarities of the distribution of the radius of curvature along the membrane diameter. It is shown that the shape of the membranes differs from spherical closer to the edge (perimeter), and in many cases also to the area of the top (center) of the membrane. A trend was found: an increase in the radius of curvature as it approaches the center of the membrane. Keywords: thin films, membrane, mechanical characteristics, mechanical stresses, deformation, deflection, strain, microelectromechanical systems, MEMS, circular membrane, silicon substrate, optical profilometry, overpressure, bulge testing, bulging method, surface, topography, radius of curvature, curvature.
Spark Plasma Sintering of Al-=SUB=-2-=/SUB=-O_3-SiC ceramics. Study of the Microstructure and Properties
Authors: Boldin M. S.  , Popov A. A.  , Murashov A. A.  , Sakharov S. V.  , Shotin S.V.  , Nokhrin A. V.  , Chuvil’deev V. N.  , Smetanina K. E.  , Tabachkova N. Yu.
Published: January 2023

The features of spark plasma sintering of submicron Al2O3 powders with different contents (0, 0.5, 1.5, 5 vol.%) of β-SiC nanoparticles have been studied. The microstructure and hardness of Al2O3 + 5 vol.% SiC ceramics obtained by sintering Al2O3 powders with β-SiC particles of various types (nanoparticles, submicron particles, fibers) have been studied. Sintering was carried out at heating rates (Vh) from 10 to 700oC/min. The sintering process of Al2O3 + SiC ceramics with low heating rates (V_h=10-50oC/min) has a complex three-stage character, with a flat area in the temperature range of 1200-1300oC. At high heating rates (V_h>250oC/min), the usual three-stage character of sintering is observed. The analysis of temperature dependences of compaction was carried out using the Young-Cutler model; It was found that the kinetics of powder sintering is limited by the intensity of grain boundary diffusion. It is shown that the dependence of the hardness of Al2O3 + SiC ceramics on Vh has a nonmonotonic character, with a maximum. In the case of pure alumina, an increase in Vh leads to a monotonic decrease in hardness Keywords: Alumina, silicon carbide, density, diffusion, hardness.
Sapphire surface layer structure and transmission in visible after sputtering in H-=SUB=-2-=/SUB=--N-=SUB=-2-=/SUB=- RF discharge
Authors: A.E. Gorodetsky  , L.A. Snigirev  , A.V. Markin  , V.L. Bukhovets  , T.V. Rybkina  , R.Kh. Zalavutdinov  , A.G. Razdobarin  , E.E. Mukhin  , A.M. Dmitriev
Published: January 2023

Leucosapphire (c-LS) structure and transmission in visible after surface treatment in 90%H2-10%N2 RF discharge are studied. According to AFM, the number of scratches of the mechanically polished surface decreased significantly after removal of about a 300 nm layer (exposure time of 12 h) under unchanged rms of roughness. According to TEM, a two-layer structure formed in the near-surface region consists of an outer 10 nm amorphous layer followed by a crystalline layer of 40-50 nm with a high defect density. The c-LS transmission in the angle of 400-1000 nm either slightly increased or remained unchanged. The demonstrated transmission stability during exposure in 90%H2-10%N2 RF discharge allows us to consider the plasma sputtering as a promising technique for cleaning contaminated windows protecting first mirror of divertor Thomson scattering being developed for ITER divertor Keywords: Leucosapphire, RF discharge, hydrogen, nitrogen, AFM, TEM, surface layer structure, visible transmission.
Dependence of the recoil energy on crystallographic directions under bombardment of a mono-crystal by slow ions
Authors: Evstifeev V. V.  , Kostina N.V.
Published: January 2023

Calculations of the recoil energy under bombardment of the surface edge (001) for the vanadium mono-crystal by K+ ions (E_0=10-50 eV) with the initial motion trajectories lying in planes perpendicular to the plane (001) and parallel to the planes (100) and (110), passing along the crystallographic directions [010] and [110], respectively, have been made by the method of molecular dynamics using a long-range interaction potential. Anisotropy of maximum energy transfer to one of the group of (3-5) atoms simultaneously participating in the interaction, depending on the ion motion trajectory, has been revealed. The energy spray thresholds for specified directions have been determined Keywords: ion bombardment, single crystal, crystallographic directions, recoil energy, sputtering thresholds.
Resistive Switching in Individual Ferromagnetic Filaments in ZrO-=SUB=-2-=/SUB=-(Y)/Ni Based Memristive Stacks
Authors: Antonov D. A.  , Filatov D. O.  , Novikov A. S.  , Kruglov A. V.  , Antonov I. N.  , Zdoroveyschev A. V.  , Gorshkov O. N.
Published: January 2023

The resistive switching effect in individual ferromagnetic filaments in memristive stacks based on ZrO2(Y)/Ni functional layers was studied experimentally. A conductive probe of an atomic force microscope played a role of a movable top electrode of a virtual memristive stack. The features of bipolar-type resistive switching found were related to the rapture and restoring of the filaments containing Ni atoms in the ZrO2(Y) dielectric films and are probably caused by different degree of metallization of the filaments. The filaments fromed were manifested in the images obtained by magnetic force microscopy as single-domain ferromagnetic particles. Keywords: memristor, resistive switching, atomic force microscopy, ferromagnetic filaments.
Formation of nanostructured films based on MoS-=SUB=-2-=/SUB=-, WS-=SUB=-2-=/SUB=-, MoO-=SUB=-2-=/SUB=- and their heterostructures
Authors: Loginov A. B.  , Ismagilov R. R.  , Bokova-Sirosh S. N.  , Bozhev I. V.  , Obraztsova E. D.  , Loginov B. A.  , Obraztsov A. N.
Published: January 2023

In this work thin film coatings based on WS2, MoS2, MoO2 and their composites were synthesized, morphological and structural properties of deposited coatings were studied. Chemical vapor deposition with heated MoO3, WO3, S powder as precursors was used. Dependence of structural and morphological properties, chemical composition of deposited films on parameters of synthesis was defined. Films of vertically aligned 10 nm thick plate crystals consisting both of pure MoO2 and MoO2 covered with thin MoS2 layer were obtained. Formation of polycrystalline films of regular triangular shaped WS2 and uniform continuous 20 nm thick WS2 films with covering area of 2x2 mm has also been observed. In this work we also report about synthesis of films consisting of regular triangular shaped WS2 crystals and MoS2 irregularly shaped crystals overlapping each other. Keywords: 2D materials, transition metal dichalcogenides, heterostructures, CVD, AFM.
Manufacturing and research of mirrors with a wide bandwidth for synchrotron applications
Authors: Akhsakhalyan A. A.  , Garakhin S. A.  , Dar'in F. A.  , Zorina M. V.  , Kriventsov V. V.  , Pershin D. D.  , Pestov A. E.  , Pleshkov R. S.  , Polkovnikov V. N.  , Rakshun Ya. V.  , Salashchenko N. N.  , Svetokhin S. S  , Svechnikov M. V.  , Sorokoletov D. S.  , Chernov V. A.  , Chkhalo N. I.
Published: January 2023

The work is devoted to the development, fabrication and analysis of broadband W / Si multilayer mirrors for a broadband monochromator, calculated for the spectral range of 7-10 keV. The possibility of using the stacking approach to obtain multilayer mirrors with a reflection coefficient of about 30% and a spectral bandwidth Delta E/E of about 20% is shown. The results of measurements of the angular and spectral reflection curves of the mirror obtained on a laboratory diffractometer and on a synchrotron in Novosibirsk are presented. Keywords: hard X-ray range, monochromator, synchrotron radiation, broadband mirrors, stack structures, multilayer X-ray mirrors.