bluuebunny/crossref_metadata_2025 huggingface dataset:
ENTRE O ADOECIMENTO E TRABALHO: AÇÕES DE QUALIDADE DE VIDA NO ÂMBITO DE SAÚDE MENTAL
Authors: Hernandes Linccon Fricks , Gonçalves João Antônio , Da Silva Wenderson Costa
Published: May 2023

Objetivo: descrever sobre o processo de saúde e doença nos profissionais de saúde mental. Metodologia: Trata-se de uma revisão integrativa da literatura, utilizando estratégia PICo e descritores. Consultou-se por meio de descritores bases de dados internacionais, como a National Library of Medicine; Biblioteca Virtual da Saúde (BVS), SCOPUS; e busca livre no Google Acadêmico. Resultados: Foram selecionados 14 estudos que atendiam a questão norteadora, os estudos abordavam sobre os profissionais de saúde mental e fatores que influenciam no desequilíbrio dos processos de saúde e doenças, e as ações e estratégias por parte dos profissionais, dos serviços, e de políticas para enfrentamento dos desafios no ambiente de trabalho e para promover a qualidade de vida dos profissionais de saúde mental. Nota-se que a compreensão da problemática e o uso de estratégias individuais e coletivas tem efeito positivo sobre os profissionais, estimulando a criatividade e autonomia dos mesmos e possibilitando a resolução de problemas que poderiam comprometer o bem estar de trabalhadores e clientes, além de tornar o ambiente de trabalho agradável. Conclusão: O estudo possibilitou expandir os conhecimentos acerca dos profissionais que trabalham com pacientes que apresentam transtornos mentais e os problemas enfrentados por eles. Dessa forma, mais pesquisas devem ser realizadas nesta linha de investigação, a fim de provar a importância de estratégias voltadas à saúde destes profissionais e dissipar preconceitos que envolvem a saúde mental.
CUIDADOS DE ENFERMAGEM DA SÍFILIS CONGÊNITA NA ATENÇÃO BÁSICA: REVISÃO INTEGRATIVA
Authors: Melo Hadassa Souza , Dos Santos Daniel Coutinho
Published: May 2023

A sífilis é uma infecção causada pela bactéria Treponema pallidum, transmitida por relações sexuais, transfusões de sangue e transmissão vertical, conhecida como sífilis congênita. As gestantes devem ser testadas para sífilis pelo menos na primeira consulta pré- natal, no início do terceiro trimestre e na admissão para o parto. Os cuidados de enfermagem às gestantes com sífilis são essenciais para garantir a saúde da mãe e do feto. Portanto o estudo tem como objetivo identificar os cuidados de enfermagem na sífilis congênita oferecidos pela atenção básica em saúde. Trata-se de uma revisão integrativa da literatura. Utilizou-se a estratégia PICo para elaboração da pergunta de pesquisa: “Quais os cuidados de enfermagem na sífilis congênita oferecidos pela Atenção Básica em Saúde?”. A busca dos artigos foi realizada através de consulta online na Biblioteca Virtual em Saúde (BVS) na qual proporcionou as seguintes bases de dados: LILACS, MEDLINE e BDENF. Utilizou-se como critérios de inclusão artigos publicados nos anos de 2017 a 2022, em inglês e português que estavam disponíveis na integra. Por fim, 17 artigos foram selecionados para leitura na integra, mas 06 deles foram eliminados por não abordarem a questão norteadora e 02 por ser revisão. 09 artigos foram considerados adequados para a análise final. É essencial que os profissionais de enfermagem sejam capacitados e sensibilizados para a importância dessas ações, e que o cuidado seja centrado no paciente, com ênfase na humanização e na integralidade do cuidado, a fim de garantir a saúde e bem-estar das crianças e suas famílias.
The Process of Contract Compliance: A Public Procurement Perspective
Authors: Babirye Nsereko Hamidah , Tait Madele , Oosthuizen Nadine
Published: May 2023

Purpose/Objectives: The purpose of this study was to determine the ideal contract compliance process in Uganda from a state department perspective.
Design/Methodology/Approach: In conducting this study, the interpretivist approach using the qualitative methodology was employed. Telephonic interviews and focus group discussions via the Zoom online platform with semi-structured interviews were conducted among 29 procurement officers, heads of finance departments, heads of procurement departments, auditors and accounting officers. The interviews explored matters concerning what is regarded as the ideal contract compliance process.
Findings: The findings indicate that the ideal contract compliance involves the following nine stages: understanding the law; procurement planning; requisitioning; establishing funds availability for the items procured; sourcing providers; contract awarding; appointing contract managers; monitoring deliveries; and payment.
Practical Implications: Studies such as the current one widen the management scope and suggest that state departments should read the mind of society and continuously engage with them; make SMART plans and budgets; streamline processes; involve technical people; legally assess the contract; and follow the existing laws.
Originality/Value: The cost of contract non-compliance is high and could lead to missed deadlines; delays in executing contracts; litigation and even cancellation of contracts. This could result in a lack of transparency and accountability; poor performance; inefficiency; and poor resource usage. To prevent these negative impacts, state departments could add policy recommendations to implement an effective contract compliance process.
Retrospective study of the pattern of eye disorders among patients in Delta State University Teaching Hospital, Oghara
Authors: Ejiro Ohwin Peggy , Gloria Abadom Ebele , Chukwuebuka Nwogueze Bartholomew , Shalom Nwabuoku Udoka , Edafe Emurotu , Gift Beteren Iroro
Published: May 2023

Objectives:

Ocular disease is an important public health issue and constitutes one of the commonest problems presenting in general primary healthcare in Nigeria. The present study examined the prevalence of eye disorders among patients attending Delta State University Teaching Hospital Oghara Delta State, Nigeria.

Material and Methods:

A descriptive study was adopted as the research design in sampling 2,003 cases in the hospital records within one (1) year using a simple random sampling technique.

Results:

Data obtained from the study revealed that 1033 (52%) of the cases reviewed were males, while 970 (48%) were females. The cases that were between the ages of 60–69 years were 395 (19.7%) out of which 216 (8.9%) were males and the remaining 179 (8.9%) cases were females. Majority of the cases reviewed were married with a frequency of 1,399 (69.9%). The occupational distribution of patients revealed that the highest ocular disease was found among civil servants with a total of 480 (24%) cases. Results of the study equally revealed that eye disorders related to the crystalline lens were the most prevalent eye diseases accounting for 620 (31%) out of the total sampled cases with cataract being the most prevalent (455, 22.7%) in this group. Conjunctiva eye disorders accounted for 320 (16%), followed by refractive errors 292 (14.6%), and retina diseases 262 (13.1%). Glaucomatous eye diseases were the fifth most detected with a total of 230 (11.5%). More so, the prevalence of optic nerve and visual pathway diseases was 86 (4.3%) out of the recorded cases while Patients with Eyelids disease had the lowest detected eye diseases with a total of 59 (3%), whereas, eye diseases of the Cornea seen was low 132 (6.6%).

Conclusion:

Eye conditions such as cataracts, conjunctivitis, refractive errors, glaucoma, cornea disorders, optic nerve, and visual pathway diseases, and eyelid disorders such as chalazion, blepharitis, and lipoma were identified to have a leading rate of a pattern of distribution with chances of complications. Hence, it is recommended that there is an urgent need for follow-up of patients of eye disorders with proper education on eye management to improve awareness of the pattern of eye disorder that could be associated with burden of visual impairment and blindness.
Skin boosters – The upcoming boom in cosmetic dermatology for healthy skin
Authors: Vedamurthy Maya , Duvvuru Vaishnavi , Chelikani Vijaya Lakshmi
Published: May 2023

Skin-booster injections are popular esthetic treatments that are highly sought after because they are minimally invasive. They are used as one of the skin rejuvenation therapies to restore healthy hydrating skin of not only the face but also the neck, hands, and other regions of the body. Skin boosting is a revolutionary method of delivering either hyaluronic acid (HA) infused with other vitamins, amino acids, and antioxidants or HA per se to stimulate the body’s natural response that is to make more collagen and elastin. Extrinsic and intrinsic factors affect the quality and vitality of our skin resulting in dull and not-so-esthetically appealing skin. Skin boosters are injected in the papillary dermis where they activate the fibroblast cells, which in turn promotes new collagen and elastin formation and reduces the activity of collagenase resulting in smooth glowing skin. There are multiple different techniques of injecting depending on the injector after clinical assessment of the patient. Skin boosters provide good hydration instant glow, reduce wrinkles and fine lines, and improve the texture of the skin. Skin boosters are different from fillers. Filler’s act as a tool for sculpting by filling up the volume deficiencies, whereas skin boosters do not exert any mechanical effects, they only stimulate further collagen and elastin production through their biochemical properties. In comparison with various skin rejuvenation procedures and topical medications, the cost of skin boosters is higher; however, various factors determine the final price. Cost constraint is one of the major limiting factors for wide usage of skin booster. Amidst our multiple skincare routines, there is a growing need to seek new methods of maintaining healthy skin. The ultimate effects of skin boosters are skin hydration, rejuvenation, and healthy-looking young and vibrant skin.
Evaluation of awareness and knowledge about medication-related osteonecrosis of jaws among interns and postgraduates: A cross-sectional study
Authors: Khangar Nidhi Jayant , khandaitkar Sandeep , Shenoi Ramakrishna
Published: May 2023

Objectives:

Osteonecrosis is a common terminology used nowadays associated with severe trauma. Osteonecrosis also known as avascular necrosis occurs due to diminished blood supply, depriving bone tissue of essential nutrients, and oxygen leading to death of bone cells in a circumscribed region. Medication-related osteonecrosis of jaws (MRONJs) are a recent concept and correspond to necrosis of bones particularly jaw bones due to use of certain medications without any prior exposure to radiation. Several medications tend to alter the bone remodeling process, affecting the diseased bone resorption, and leading to poor oral health maintenance. Adequate documentation and awareness about this condition can help to prevent the condition. This study aims to evaluate the existing knowledge that prevails about pathogenesis, staging, and treatment modalities currently available about the condition among interns and postgraduates.

Materials and Methods:

An online questionnaire-based cross-sectional survey was carried out among interns and postgraduates of VSPM’s Dental College and Research Center. General characteristics, knowledge about medications responsible, pathogenesis, risk factors, staging, treatment protocols, and drug holiday were recorded that the responses were compiled and statistically analyzed.

Results:

A total of 125 participants participated in the survey. About 72.8% of participants had heard about this condition earlier, whereas 8.8% were unaware of this terminology. About 27.2% people had no idea about the drug holiday concept. Furthermore, significant difference existed between designation and responses.

Conclusion:

The results suggest that a significant difference exists between awareness about MRONJ among interns and postgraduates. Postgraduate students currently pursuing their degree were more aware and had significant knowledge about the clinical entity and more inclined toward further upgrading their knowledge about the same rather than interns.
Complete visual recovery after an inadvertent foveal burn
Authors: Abdi Fatemeh , Daneshtalab Arash , Gordiz Arzhang , Zand Amin
Published: May 2023

We want to describe a case of inadvertent foveal burn during retinal laser in a patient with proliferative diabetic retinopathy (PDR). We report a 50-year-old male with PDR whose pattern scanning laser (Pascal®) procedure was complicated by an accidental foveal burn. On initial evaluation, the best-corrected visual acuity of the affected eye was 20/40. Fundoscopy revealed multiple laser burns in the macula, one of which crossed the fovea. The optical coherence tomography (OCT) showed an inadvertent burn at the foveal region and multiple parafoveal laser spots with the disrupted corresponding external limiting membrane (ELM), ellipsoid (EZ), and interdigitation zones. The patient underwent serial follow-up examinations. Six months after laser therapy, vision significantly recovered and improved to 20/20 in the affected eye. The results of follow-up OCT imaging showed that the ELM defect had fully recovered and the EZ defect had become smaller, as an unexpected and rare outcome. As a rare and interesting condition, laser burns around the foveal region seem to have the chance of retinal recovery over time. However, in most of the similar conditions, these accidental foveal laser burns lead to permanent severe visual impairment. Therefore, well-trained physicians must do retinal laser procedures.
PENGARUH PASAR MODAL SYARIAH TERHADAP PERTUMBUHAN EKONOMI NASIONAL: PENDEKATAN METODE VECTOR ERROR CORRECTION MODEL (VECM)
Authors: Fathurrahman Ayif , Al-Islami Hamiyah
Published: May 2023

Penelitian ini bertujuan untuk menganalisis pengaruh saham syariah, obligasi syariah (sukuk), reksadana syariah terhadap pertumbuhan ekonomi nasional. Jenis penelitian ini adalah penelitian kuantitatif dengan menggunakan data time series berjumlah 60 sampel dengan data bulanan dari Januari 2015 sampai dengan Desember 2019. Analisis dasar yang digunakan dalam penelitian ini adalah Vector Error Correction Model (VECM), dan Granger Causality Test digunakan untuk menentukan arah kausalitas. Penelitian ini juga menggunakan fungsi Impulse Response Function dan Variance Decomposition untuk mengetahui pengaruh masing-masing variabel terhadap variabel lainnya. Hasil penelitian menunjukkan, dalam jangka pendek secara parsial saham syariah, sukuk, dan reksadana berpengaruh tidak signifikan terhadap pertumbuhan ekonomi nasional. Dalam jangka panjang, saham syariah memiliki pengaruh negatif dan tidak signifikan terhadap pertumbuhan ekonomi nasional, sedangkan sukuk dan reksadana syariah memiliki pengaruh negatif dan signifikan terhadap pertumbuhan ekonomi nasional. Sementara itu, saham syariah, sukuk, dan reksadana syariah secara simultan memiliki pengaruh yang siignifikan terhadap pertumbuhan ekonomi nasional.
Origins of hydrogen peroxide selectivity during oxygen reduction on organic mixed ionic-electronic conducting polymers
Authors: De La Fuente Durán Ana , Liang Allen Yu-Lun , Denti Ilaria , Yu Hang , Pearce Drew , Marks Adam , Penn Emily , Weaver Karrie , Turaski Lily , Maria Iuliana P. , Griggs Sophie , Chen Xingxing , Salleo Alberto , Chueh William C. , Nelson Jenny , Giovannitti Alexander , Mefford J. Tyler
Published: May 2023

Electrochemical reduction of atmospheric oxygen provides carbon emission-free pathways for the generation of electricity from chemical fuels and for the distributed production of green chemical oxidants like hydrogen peroxide. Recently, organic mixed ionic-electronic conducting polymers (OMIECs) have been reported as a new class of active electrode materials for the oxygen reduction reaction. This work sets out to identify the operative oxygen reduction mechanism of OMIECs through a multi-faceted experimental and theoretical approach. Using a combination of pH-dependent electrochemical characterization, operando UV-Vis and Raman spectroscopy, and ab initio calculations, we find that the n-type OMIEC, p(NDI-T2 P75), displays pH-dependent activity for the selective reduction of oxygen to the 2-electron hydrogen peroxide product. We use microkinetic simulations of the electrochemical behavior to rationalize our experimental observations through a polaron-mediated pathway involving chemical reduction of oxygen to the 1-electron superoxide intermediate followed by pH-dependent catalytic disproportionation to hydrogen peroxide. Finally, this pathway is applied to understand the experimental oxygen reduction reactivity of an expanded set of n- and p-type OMIECs.
Free and Internal Energies for the Adsorption of Short Alkanes into the Zeolite SSZ-13 from Ab Initio Molecular Dynamics Simulations
Authors: Hutton Daniel J. , Göltl Florian
Published: May 2023

Electronic structure calculations have become a valuable tool in understanding chemical reactions of hydrocarbons in zeolite pores. However, commonly applied approaches to calculate free energies based on static electronic structure calculations significantly overestimate the entropic penalty for molecular adsorption into zeolite pores. Here, we use ab initio molecular dynamics (AIMD) simulations to model the adsorption of methane, ethane, and propane to purely siliceous and protonated SSZ-13. In our analyses we focus on the internal and Helmholtz free energies of adsorption of each molecule and compare our results to various approaches for the calculation of free energies based on static calculations. We find that only an approach that retains two thirds of the translational entropy of the adsorbate upon adsorption compares favorably with AIMD simulations. However, comparison to experimental measurements of Gibbs free energies of adsorption reported in the literature implies that we might not have captured the full complexity of alkane adsorption in our model. We expect that results in this work will help to develop a better understanding of alkane adsorption in zeolites, and that the provided data will serve as a benchmark for free energy calculations of alkane adsorption in zeolites in the future.
Adaptive Supramolecular Networks: Emergent Sensing from Complex Systems
Authors: Selinger Allison , Hof Fraser
Published: May 2023

Molecular differentiation by supramolecular sensors is typically achieved through sensor arrays, relying on the pattern recognition responses of large panels of isolated sensing elements. Here we report a new one-pot systems chemistry approach to differential sensing in biological solutions. We constructed an adaptive network of three cross-assembling sensor elements with diverse analyte-binding and photophysical properties. This robust sensing approach exploits complex interconnected sensor-sensor and sensor-analyte equilibria, producing emergent supramolecular and photophysical responses unique to each analyte. We characterize the basic mechanisms by which an adaptive network responds to analytes. The inherently data-rich responses of an adaptive network discriminate among very closely related proteins without relying on designed protein recognition elements. We show that a single adaptive sensing solution provides better analyte discrimination using fewer response observations than a sensor array built from the same components. We also show the network’s ability to adapt and respond to changing biological solutions over time.
High-Throughput Electrochemical Characterization of Aqueous Organic Redox Flow Battery Active Material
Authors: Fell Eric , Aziz Michael
Published: May 2023

The development of redox-active organics for flow batteries providing long duration energy storage requires an accurate understanding of molecular lifetimes. Herein we report the development of a high-throughput setup for the cycling of redox flow batteries. Using common negolyte redox-active aqueous organics, we benchmark capacity fade rates and compare variations in measured cycling behavior of identical volumetrically unbalanced compositionally symmetric cells. We propose figures of merit for consideration when cycling sets of identical cells, and compare three common electrochemical cycling protocols typically used in battery cycling: constant current, constant current constant voltage, and constant voltage. Redox-active organics exhibiting either high or low capacity fade rates are employed in the cell cycling protocol comparison, with results shown from over 50 flow cells.
Sentinel lead pipe racks quantify orthophosphate’s dose-response in drinking water
Authors: Trueman Benjamin F , Krkošek Wendy H , Gagnon Graham A
Published: May 2023

Orthophosphate is used to minimize lead contamination of tap water, but its benefits are difficult to quantify since lead concentrations are plumbing-dependent. Homes serviced by lead pipe are ideal for monitoring orthophosphate treatment, but best practices dictate the removal of lead once identified, which complicates sampling plans. Here we explore an alternative: recovered lead pipe racks supplied with distributed drinking water at various locations within a water system. We also propose a strategy for analyzing the data based on the generalized additive model, which approximates time series as a sum of smooth functions. In this study, geometric mean lead release from pipe racks exhibited a pronounced dose-response, falling by 54% after an increase from 1 to 2 mg PO4 L-1, and then climbing by 55% after a decrease to 1.5 mg PO4 L-1. Data from nine sentinel homes were consistent with those from pipe racks: geometric mean lead at the high orthophosphate dose was 60% of that at the low dose. Our results demonstrate sentinel pipe racks as a viable alternative to at-the-tap sampling for non-regulatory corrosion control monitoring. They also provide a Bayesian framework for quantifying orthophosphate’s effect on lead release that can incorporate information from multiple sources.
TeachOpenCADD goes Deep Learning: Open-source Teaching Platform Exploring Molecular DL Applications
Authors: Backenköhler Michael , Kramer Paula Linh , Groß Joschka , Großmann Gerrit , Joeres Roman , Tagirdzhanov Azat , Sydow Dominique , Ibrahim Hamza , Odje Floriane , Wolf Verena , Volkamer Andrea
Published: May 2023

TeachOpenCADD is a free online platform that offers solutions to common computer-aided drug design (CADD) tasks using Python programming and open-source data and packages. The material is presented through interactive Jupyter notebooks, accommodating users from various backgrounds and programming levels. Due to the tremendous impact of deep learning (DL) methods in drug design, the TeachOpenCADD platform has been expanded to include an introduction to molecular DL tasks. This edition provides an overview of DL and its application in drug design, highlighting the usage of diverse molecular representations in this field. The platform introduces various neural network architectures, including graph neural networks (GNNs), equivariant graph neural networks (EGNNs), and recurrent neural networks (RNNs). It demonstrates how to use these architectures for developing predictive models for molecular property and activity prediction, exemplified by the Quantum Machine 9 (QM9), ChEMBL, and Kinase Inhibitor BioActivity (KiBA) data sets. The DL edition covers methods for evaluating the performance of neural networks using uncertainty estimation. Furthermore, it introduces an application of GNNs for protein-ligand interaction predictions, incorporating protein structure and ligand information. The TeachOpenCADD platform is continuously updated with new content and is open to contributions, bug reports, and questions from the community through its GitHub repository (https://github.com/volkamerlab/teachopencadd). It can be used for self-study, classroom instruction, and research applications, accommodating users from beginners to advanced levels.
Study on ordered anode in proton exchange membrane water electrolysers
Authors: Zhang Zijin , Gao Hongmei , Liu Jiaqi , Wu Tianyu , Qiu Mengyi , Wang Jinbo , Chen Ru
Published: May 2023

Acidic oxygen evolution reaction is crucial for proton exchange membrane water electrolysers, which have been hindered by the high catalytic overpotential and high loading of noble metal catalysts and high mass transfer resistance. Here we present an ordered anode with ultra low precious metal loading. Ordered TiO2 nanotubes were grown on a titanium substrate by elec-tro-oxidation, then treated at high temperature in H2/Ar to enhance the electrical conductivity of the substrate, and finally loaded with IrO2 by electrodeposition. This ordered anode exhibits a low overpotential of 224 mV at 10  mA  cm-2 towards oxygen evolution reaction in 0.5 M H2SO4. A proton exchange membrane electrolyser using the ordered anode with a low mass loading of 59.27 μg cm-2 can operate stably at 500 mA  cm-2 for 1000 hours. The contact resistance of the ordered membrane electrode assembly is lower than that of the conventional second generation membrane electrode by the equiva-lent circuit fitting analysis of electrochemical impedance spectra.
Smoking in Children: A Habit or Fixation?
Authors: JUNEJA Akanksha , SULTAN Amina
Published: May 2023

Even though most of the Indian population lives in a joint family system, where the focus of attention for the family is the child; still smoking in childhood and adolescence is very much prevalent. What is most disturbing about this fact, three-quarters of adolescents who smoke frequently carry on smoking as adults. It brings us to the point that, do we need to think of any other alternative, or do we need to shift our focus to some other direction? Should the focus be shifted from habit to years of psychological and personality development of the child?
The Position and Actions of the People’s Republic of China Regarding the Russian-Ukrainian War
Authors: Габро Ірина , Шевчук Олександр
Published: May 2023

The article reveals the position and actions of the People’s Republic of China (PRC) regarding the Russian-Ukrainian war after February 24, 2022. The main leitmotifs of the PRC leadership’s statements on the international arena also look dualistic. On the one hand, the leader of the People’s Republic of China, Xi Jinping, attests to the need to stop the war as soon as possible; together with French President F. Macron calls to respect the territorial integrity of Ukraine and resolve the conflict through negotiations. But on the other hand, Beijing votes in favor of Russia in the UN, and Chinese state media supports Moscow’s position.

Currently, the Russian-Ukrainian war, which is a global geopolitical conflict, is viewed by China as a “window of opportunity”. Beijing longs to create its own economic macro-region in East Asia, while competing for global leadership with the United States, whose focus is currently more concentrated on the security of Europe as a whole in the context of Russian aggression against Ukraine.

Russia’s aggression against Ukraine caused the general spectrum of the “Taiwan problem” to play with new “colors”. The next aggravation of relations between the US and the PRC regarding the “Taiwan issue” took place in the spring of 2022. However, an open armed confrontation between the US and the PRC regarding the resolution of the “Taiwan issue” currently seems unlikely, and sharp political statements by the leaders of both the PRC and the US is an illustration to both the citizens of their countries and to their allies that they have the situation under control and are ready to use any means necessary to achieve their long-term national interests.

Suffering losses nowadays as a result of Russia’s war against Ukraine, China is quite logically advocating an end to this armed confrontation, at the same time, this crisis has opened up certain strategic opportunities for the PRC that Beijing can take advantage of in the long term.
Зміни та виклики в системі міжнародної взаємодії в Арктиці через російсько-українську війну
Authors: Атаманенко Алла , Цвєтков Олександр
Published: May 2023

У статті досліджено вплив російсько-української війни на безпекову ситуацію та зміни в системі міжнародного співробітництва в Арктиці. Автори намагаються встановити можливі наслідки змін у сферах колективного реагування та управління регіональними міжнаціональними відносинами на основі системного аналізу офіційних документів і матеріалів низки установ і організацій, які визначають особливості міжнародного співробітництва в регіоні, а також наукові публікації з цього питання, зміни, що відбулися у зв’язку з міжнародною реакцією на російську збройну агресію, в тому числі пов’язану з початком повномасштабної війни.

Автори досліджують виклики міжнародній безпеці та припинення співпраці з агресором у регіональних міжнародних організаціях, які виступають платформою для регулювання арктичної політики та форумом відповідних комунікацій. Приділено увагу чиннику санкційної політики, що застосовується до агресора з метою відмежування його від політичного режиму останнього та припинення його військових дій, а також впливу на позицію та можливості Росії в Арктичному регіоні.

У результаті дослідження було зроблено висновок, що російська агресія проти України дестабілізувала систему міжнародних відносин загалом і в Арктичному регіоні зокрема. Призупинення роботи Арктичної ради та інших регіональних організацій було зумовлене етичними та цивілізаційними факторами, пов’язаними з неспровокованою агресивною повномасштабною війною Росії проти України, але поставило питання про необхідність продовження колективного регулювання важливих питань їх компетенції. Видається малоймовірним, що найближчим часом агресор братиме участь у діяльності Арктичної ради та інших організацій. Проте в перспективі зі зміною геополітичних обставин можливе повернення до співпраці восьми країн регіону в рамках спільної організації з метою координації виконання нагальних екологічних, кліматичних, культурних та інших питань.
Students' Teaching Experiences Of Kampus Mengajar Program In Teaching Literacy and Numeracy At Elementary Schools In Cirebon
Authors: Meliyana Atika , Sugesti Ikariya
Published: May 2023

Nadiem Makarim founded the kampus mengajar program in 2021, which entails students from various study programs going straight to schools in 3T location.  This study aimed to explore students experiences through kampus mengajar program in conducting teaching literacy and numeracy in the 2021–2022 academic year. Five students from the Faculty of Teacher Training and Education at Universitas Muhammadiyah Cirebon participated in this qualitative research study using a narrative inquiry design as its methodology. The narrative frame and interview findings were utilized as the source of the data in this study to examine how students experienced teaching literacy and numeracy while actively participating in the kampus mengajar program as well as the difficulties they encountered. The stages of this narrative research included identifying the phenomena to be studied, deciding participants who would allow researcher to study the phenomena, gathering information (experiences) from participants, retelling information (experiences) from participants, and writing narratives based on information (experiences) from participants. The results revealed that teachers at the target schools greatly benefited from the Kampus Mengajar program's implementation. Nevertheless, aside from that students faced the challenges in teaching literacy and numeracy. The lack of student motivation, the amount of students who still struggle with reading and counting, the lack of learning materials that assist literacy and numeracy, and the restricted use of technology by teachers are a few of the factors.
Exploring and Reflecting on Problems and Challenges in Teaching Culture for English Young Learners
Authors: Talenta Pratama Irwin , Angie Pavita Maria Dimitrij , Amrullah Yozar Firdaus
Published: May 2023

This study aims to reflect on the problems and challenges in teaching culture to English Young Learners (EYL) primarily related to the English context. The study focused on two objectives; to find out problems and challenges faced by the teacher in teaching culture for EYL, as well as the effective methods used to teach culture for EYL. Recently, many more pre-schools in Indonesia have offered English as a major in the learning process. For example, KB TK Hj Isriati Baiturrahman 2 made English as a central subject in daily life. Ideally, the teachers are required to know English culture besides the teaching itself. However, they found  some problems in teaching culture when they asked the students to practice “how to say, go to the toilet in English”; it made students’ perspectives in their home opposites. This study tried to investigate this issue from the teachers’ problems. The interviews and classroom observations data showed that the cultural aspects of language were still not good. The possible strategies also showed a solution to face the problems. Thus, teaching English in Indonesia should consider the culture because to communicate functionally using the language and the students have to be familiar with the culture.
Determination of refractive indices of materials in modeling multilayer mirrors
Authors: Sergienko A. A. , Pushkin D. B. , Konotopov P. A. , Cheremnykh A. D.
Published: May 2023

Thin-film coatings for optical elements are widely used in various industries. Antireflection coatings are used in display screens, photodetectors, fiber optic light guides, mirror coatings are used for telescopes, medical equipment, etc. One of the main goals in the production of thin-film coatings is to determine the refractive index and the choice of materials applied to optical products. We present the results of determining the refractive indices of materials used for the manufacture of multilayer mirrors with the desired spectral characteristics. In general, light reflection occurs at the interface between two materials, for example, glass and air. Dielectric films were obtained by high-frequency ion-beam sputtering of the target. It is shown that the refractive index of the SiO2 film must be repeatedly corrected to minimize systematic errors. The results obtained can be used in the production of high-precision optical systems for various industries, especially medicine, space instrumentation, aviation and others.
Study of the generalized curves of the static and cyclic deformation, damage and fracture
Authors: Makhutov N. A. , Gadenin M. M.
Published: May 2023

Individual deformation diagrams of all materials on metal, non-metal, or composite base under static and cyclic load link stresses and strains. These diagrams are obtained in standard tensile, compression, torsion or bending tests of laboratory samples with the registration of forces and deformations of their working parts upon loading. The diagram for a single static deformation in the stress-strain coordinates in this case covers both the region of elastic deformations and the region of elastic-plastic deformation, when deformations are localized in the neck of the loaded sample up to the moment of its destruction at a critical stress level. It is shown that linear, fractional-linear and power approximation of the obtained deformation curve are widely used in the description of the obtained deformation diagrams. Direct experiments, the theory of dislocations and the statistical theory of strength confirm the priority of power approximation of considered diagrams. At the same time for all construction materials the generalized deformation diagram in relative coordinates is described by a single power equation with the individual hardening parameter which is determined experimentally or theoretically using the dependences linking data on the module of elasticity, yield stresses, strength, and ultimate plasticity of the material. Diagrams of a cyclic elastoplastic deformation in the form of loops of plastic hysteresis are recorded by analogy with static tension diagrams with «stress – strain» axes of in conditional and true relative values. The generalized deformation diagrams for a single static and cyclic loading form a scientific basis for construction of the generalized fatigue curve on the basis of deformation fracture criterion for a wide range of cycles to failure. An effective solution to the problems of strength and service life for the most complex engineering objects such as nuclear reactors, aircraft, rocket and space systems can be achieved through introduction of generalized deformation and fracture diagrams into consideration and corresponding calculations. Their significance will especially increase in the design and implementation of new unique science-intensive facilities.
Comparison of methodological approaches to the determination of organic carbon in wastes of mining, processing and combustion of coal
Authors: Sergeeva A. S. , Golynets O. S. , Medvedevskikh M. Yu. , Kochetkova E. M. , Epstein S. A.
Published: May 2023

The content of organic carbon is one of the key indicators in determining the areas of using waste of mining, processing and combustion of coal. The measurement results obtained by existing measurement methods are often incomparable to each other, which does not allow obtaining a reliable information about the waste composition. The goal of this study is to generalize current methodological approaches and choose the most effective one for determining the content of organic carbon in samples of waste of mining, processing and combustion of coal. Three most appropriate methods were selected proceeding from the analysis of the methods used for determining organic carbon in various natural and technogenic objects. Method No. 1 is based on the calculation of organic carbon content as the difference between total carbon measured by a CHN analyzer and carbonate carbon determined by the gravimetric method. In method No. 2, the determination of organic carbon content is carried out through the determination of the ash, moisture and carbonate carbon content. Method No. 3 includes demineralization of the sample with hydrochloric acid, drying, and calcination of the resulting residue. The samples of waste of mining, processing and combustion of coal with mass fraction of organic carbon from 0 to 60% were used as objects of the research. According to the results of experimental studies and taking into account possible limitations, measurement procedure based on method No. 3 for determining the content of unburned carbon in ash and slag from a thermal power plant was chosen. The applicability of the newly developed measurement procedure was verified for an extended area of objects, which includes, in addition to the samples of coal combustion waste, the samples of waste of their mining and processing. The comparability of the results obtained by other methods was demonstrated, and a preliminary assessment of the metrological characteristics was performed. The measurement procedure can be used in analysis of the reference samples used for construction of the calibration characteristics in the determination of organic carbon by instrumental methods, as well as in the determination of the metrological characteristics of the reference materials of the composition of waste of mining, processing and combustion of coal.
Application of neural network technologies to load monitoring in aircraft structure bearing elements
Authors: Orlov A. A. , Sypalo K. I. , Gorodnichenko V. I. , Bautin A. A.
Published: May 2023

Economic efficiency in the operation of aircraft local air lines (LA) can be improved by increasing the awareness of the loading and aircraft structure integrity, with the subsequent adjustment of the maintenance program in accordance with the actual operating conditions. The allowance for specific features of loading load-bearing elements at transport aircraft during particular operations provides a significant extending in the safe life (in some cases, by several times). However, at the moment, load monitoring systems in the aviation industry have not yet been implemented universally. The implementation of the well-known approaches developed for monitoring and analyzing loads requires significant changes in the programs and procedures for maintaining airworthiness, including the need to install additional sophisticated measuring equipment. We propose an alternative approach to existing methods of load monitoring without using additional measuring equipment. The main stage is formation of the relationship between the flight parameters recorded by the standard on-board recorder and the loading parameters, which are determined by computational and experimental methods as a result of processing strain gauge data. A sufficient bulk of the strain data is usually obtained during the flight tests at the certification stage. Testing of this technique is considered with reference to the example of the loads in the elements of high lift devices of aircraft flaps. The average error in the estimates of the forces in the connecting rods of the inner flaps does not exceed 6%. The results obtained make it possible to determine with the acceptable accuracy the individual accumulated damageability of an aircraft structure and to assess the residual safe life. The presented approach is a part of the methodological framework necessary for the development and implementation of modern means of analyzing the integrity of the structure, implemented on the basis of on-board monitoring systems of local airlines aircraft.
Evaluation of the incubation period of polymers in cavitation wear by the method of profilometry
Authors: Tsvetkov Yu. N. , Fiaktistov Ya. O.
Published: May 2023

The possibility of using profilometry for determining the duration of the incubation period of polymeric materials upon their testing for cavitation wear is considered. Six polymeric materials were tested for cavitation wear: plexiglass, fluoroplastic, low-pressure polyethylene, caprolon, Thordon SXL polymer, and epoxy compound. All the polymers were tested in fresh water kept at 20 ± 3°C, using an ultrasonic magnetostrictive vibrator, the vibration frequency and amplitude of the device horn butt were 22 kHz and 28 μm, respectively. The distance between horn butt and the butt-end surface of the cylindrical polymer sample was set at 0.50 mm. The samples were periodically weighed during testing, the roughness of their worn surface was evaluated, and sample mass loss and arithmetical mean deviation of the assessed profile of its surface were plotted as a function of the test duration. Like the cavitation wear of metals, the cavitation wear of polymers is also characterized by the presence of an incubation period, during which the separation of the wear particles from the sample surface does not take place yet. It is shown, that determination of the incubation period from the dependence of the mass loss vs test duration distinguishes is rather laborious, and, moreover, is accompanied by large errors due to water absorption. The use of profilometry was proposed to shorten the time and increase the accuracy of the determination of the incubation period of the cavitation wear of polymers. The arithmetical mean deviation of the profile of the surface under study is measures periodically during testing for cavitation wear. The duration of the incubation period is determined using the dependence of the arithmetic mean deviation of the wear surface profile on the duration of the cavitation impact by the abscissa of the point, in which the monotony and(or) smoothness of the dependence (plot) is violated.
Делокализация электронов и релятивистские эффекты в электронном строении и параметрах ЯМР комплексных катионов [Cp*3M3Se2]2+ (M = Rh, Ir)
Authors: Мирзаева И.В.
Published: May 2023

Методами теории функционала плотности исследован вопрос наличия или отсутствия связей металл-металл в комплексных катионах [Cp*3M3Se2]2+, где M = Rh, Ir. Анализ связывания проводился методами AIM, анализа локализованных орбиталей Бойза-Фостера и NBO. Показано, что в данных системах в следствие сильной делокализации электронов лучше говорить не о двухцентровых связях металл-металл, а о трёх центровых связях M-M-Se и четырёхцентровых связях M-Se-M-Se. Состав связевых орбиталей в родиевом и иридиевом комплексах различаются. Анализ химического вклада различных NBO в экранирование Se показал, что различие химических сдвигов ЯМР на 77Se связано не с наличием или отсутствием связей металл-металл, а с изменением вклада неподелённой пары на Se, разрыхляющих орбиталей M-Se и примешиванием орбиталей второго атома Se в иридиевом комплексе.
Can Tesla Sphere be used for Random Number Generation?
Authors: ARSLAN Oğuzhan , KIRBAŞ İsmail
Published: May 2023

The use of random numbers to represent uncertainty and unpredictability is essential in many industries. This is crucial in disciplines such as computer science, cryptography and statistics, where the use of randomness helps to guarantee the security and reliability of systems and procedures. In computer science, random number generation is used to generate passwords, keys and other security tokens, as well as to add randomness to algorithms and simulations. According to recent research, the hardware random number generators used in billions of IoT devices do not generate enough entropy. This paper describes how raw data collected by IoT system sensors can be used to generate random numbers for cryptography systems and also examines the consequences of these random numbers. Colour, light and camera are used as sensors. Monobit and poker test results are analysed to measure the quality of randomness. Sequences were obtained with the method that gave quality values as a result of the analysis and these sequences were entered into the NIST and FIPS 140-1 randomness test packages. When the results of these two tests were analysed, it was observed that the sequences passed all tests successfully.
Literature Study of Political Communication Based on Politic Identity and Symbolic Interactionism: The Role of Middle Class in Information of Democratization
Authors: Firmansyah Muhamad Ferdy , Kurniawan Apip
Published: May 2023

Political communication is a very important part of the development of politics in Indonesia. Every general election will be filled with various kinds of propaganda targeting various segments of society. Identity politics is a form of public political expression that uses slogans that contain every political message. The characteristics of the use of identity politics can be identified through the concept of symbol interactionism. This study uses a qualitative approach with literature studies and focuses on analyzing the relationship between identity politics by identifying it with the concept of symbol interactionism and connecting it with Acemoglu's three-class model with a focus on middle-class voters. The purpose of this study is to find out the impact of the movement of using identity politics targeting the lower middle class on efforts to mature democratization in political communication. This research will combine the phenomenon of identity politics with symbol interactionism to a simplified pattern of political communication. The results obtained are the phenomenon of identity politics which is identified by symbol interactionism and mathematical modeling is formed as an explanation for the classification of each phenomenon. The classification of each phenomenon found in this study includes elements of (1) revolution, (2) repression, and (3) coup. By referring to the literature associated with the identity politics model in symbol interactionism, it is found that the role of the middle class is very small in the revolution, very high for starting repression, and very unlikely to start a coup.