bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of IP-TIG welding parameters on weld bead geometry, tensile properties, and microstructure of Ti6Al4V alloy joints
Authors: Vijayakumar Vaithiyanathan , Sonar Tushar , Venkatesan Sivamaran , Negemiya Arun , Ivanov Mikhail 
Published: February 2024

Abstract
The primary aim of this study is to analyze the influence of inter-pulse tungsten inert gas (IP-TIG) welding parameters (peak current, inter-pulse current, and inter-pulse frequency) on weld bead geometry, tensile properties, and microstructure of Ti6Al4V alloy joints for gas turbine applications. IP-TIG welding principally featured by magnetic arc constriction and pulsing was employed to overcome the high heat input problems in TIG welding of thin Ti6Al4V alloy sheets such as wider bead and HAZ, coarsening of beta grains, inferior ductility, distortion of joints, and atmospheric contamination which significantly deteriorates the mechanical performance of welded sheets. The tensile properties and microhardness of IP-TIG joints were evaluated and correlated to the microstructural features. The microstructural features were analyzed using optical microscopy. The fractured surfaces of tensile specimens were studied using scanning electron microscopy. Results showed that the Ti6Al4V alloy joints developed using peak current of 50 A, inter-pulse current of 30 A, and inter-pulse frequency of 20 kHz exhibited greater strength, hardness and elongation. It showed greater tensile strength of 1030 MPa, yield strength of 981 MPa, and elongation of 10 % and FZ microhardness of 391 HV0.2. It is mainly due to the development of refined grains in fusion zone (FZ).
Effect of water jet erosion parameters on erosion rate of WC10Ni5Cr HVOF coated 35CrMo steel
Authors: Pradeep Raj Rajendran , Thirumalaikumarasamy Duraisamy , Sonar Tushar , Pavendhan Rajangam 
Published: February 2024

Abstract
This research work aims for developing the water jet erosion (WJE) prediction equation and analyzing the optimum water jet erosion parameters such as impingement angle (degree), water jet velocity (m s−1), stand-off distance (mm), and erodent discharge rate (g min−1) for minimizing the water jet erosion of 35CrMo steel coated with WC10Ni5Cr coating. The optimized high velocity oxy fuel (HVOF) process parameters were employed for developing the coating of WC10Ni5Cr on 35CrMo steel. The WJE prediction equations were checked for its validity employing analysis of variance (ANOVA). The water jet erosion was measured as the loss of mass (g) after water jet erosion testing for noncoated and coated 35CrMo steel substrates. From the results it was analyzed that the noncoated and coated 35CrMo steel substrates when subjected to the impingement angle of 60°, water jet velocity of 15 m s−1, stand-off distance of 40 mm, and erodent discharge rate of 1500 g min−1 displayed lower mass loss of 0.0177 g and 0.0079 g. The coated 35CrMo steel substrate showed 55.36 % decrement in erosion compared to noncoated 35CrMo steel substrate. These findings support the employability of WC10Ni5Cr HVOF coating for 35CrMo steel to improve its water jet erosion resistance in engineering applications.
The United Nations and Blockchain Technology
Authors: Muedini Fait 
Published: February 2024

Abstract
In this essay, I discuss the United Nations and its activities as they pertain to the use of blockchain technology. I argue that while this technology is rather new, the United Nations has been open to using such technological innovations to better solve human rights challenges that include fighting to end child trafficking, better distributing food aid, and reducing carbon emissions. Finally, the essay discusses the future prospects for blockchain technology and the UN.
Effect of in-situ mineralization of calcium carbonate on the aging resistance of Wikstroemia bast fiber
Authors: Wang Jian , Wang Yubo , Shao Xinyi , Lin Yuxuan , Song Wenbao , Xu Dehua , Gao Yifei 
Published: February 2024

Abstract
Paper cultural relics, as the carriers of human civilization, inevitably deteriorate during the long-term storage. The restoration of those damaged or aged paper cultural relics is an important part of cultural relics protection. How to obtain the fiber with high permanence property is the key to the repair paper used to cultural relic restoration. Herein, in order to obtain high permanence lignocellulosic fiber, nano-CaCO3 was introduced inside the Wikstroemia bast fiber by in-situ mineralization. Under accelerated aging condition, the microstructure, chemical structure, crystallinity, degree of polymerization, variation of pH, alkali reserve and mechanical strength of the fiber before and after mineralization were studied. The results showed that nano-CaCO3 had no obvious effect on the properties of paper prepared from those mineralized fibers, but it can effectively neutralize the acid generated inside the fiber, slow down the degradation rate of cellulose and improve the permanence of the paper during the aging process. It provides a new insight for the manufacture of repair paper for cultural relics restoration.
СТРУКТУРА ІНФОРМАЦІЙНОЇ КУЛЬТУРИ МАЙБУТНЬОГО ФАХІВЦЯ ОСВТНЬОЇ ГАЛУЗІ
Authors: КУПІНА ОКСАНА 
Published: February 2024

Стаття присвячена важливості інформаційної культури для сучасного педагога та підкреслює роль інформаційних технологій в освітньому процесі. Автор наголошує на необхідності постійного самовдосконалення та розвитку як ключових аспектів успішної педагогічної діяльності; використанні сучасних підходів та інформаційних ресурсів, що є необхідною умовою для відповіді на потреби сучасного інформаційного суспільства. Таким чином, інформаційна культура визнається інструментом для роботи з інформацією і для професійного зростання сучасного вчителя.
Controlling reaction transfer between Al/Ni reactive multilayer elements on substrates
Authors: Shekhawat Deepshikha , Sulman Muhammad , Breiter Manuela , Pezoldt Jörg 
Published: February 2024

AbstractReactive multilayers produce exothermic reaction with definite velocity and maximum temperature after ignition, which are the fundamental properties of the reactive multilayer systems. The generated heat with certain velocity makes it widely used in joining, bonding in the packaging, thermal batteries and many more applications. In this work, a distinct approach for achieving a reaction transfer between the reactive multilayers and different materials is demonstrated which can affect the generated temperature and velocity from the self-propagating properties of the reaction. For these intensions, we fabricated the Al/Ni reactive elements with certain separations between elements which allow to observe the reaction front transfer and emitted temperature in the reaction chain. The created separation between reactive elements are periodical and ordered systems with different thermal conductive properties. The temperature and definite velocity were measured by time-resolved pyrometer and high-speed camera measurements. SEM analysis showed the characteristics of the reaction transfer between reactive multilayer elements. It is predicted that: (I) The reaction front stops at a space with critical length; (II) Reducing heat loss through the substrate supports reaction front propagation through spaces; (III) Thermal property design of the spaces between the reactive elements enables property modification of the self-propagating reaction.Graphical abstract
Out-of-hospital cardiac arrest: assessing the problem status and identifying priority areas for improving the care provision. Data from the 2020-2022 Crimean registry
Authors: Birkun A. A. , Frolova L. P. , Buglak G. N. 
Published: February 2024

Aim. To study the regional epidemiological characteristics of out-of-hospital cardiac arrest (OHCA), the process and effectiveness of care for OHCA, and identify priority areas for improving the care provision.Material and methods. An analysis of the data from the "Crimean registry of cases of OHCA and cardiopulmonary resuscitation" was performed. The study used data from 2020 to 2022. The analytical sample consisted of all OHCA cases developed before the ambulance arrival, followed by cardiopulmonary resuscitation (CPR).Results. Of the 356 OHCA cases occurred before the ambulance arrival, followed by CPR (2020 — 141, 2021 — 103, 2022 — 112), in 65,2% of cases (n=232) cardiac arrest developed in men, in 64,0% (n=228) — in city residents, 70,2% (n=250) — in private houses or apartments. The mean age was 59 years (median 62 years). The cause of 89,6% of OHCA cases (n=319) was disease, 3,9% (n=14) — drowning, 2,8% (n=10) — trauma, 2,0% (n=7) — asphyxia, 1,1% (n=4) — toxicity, 0,6% (n=2) — electrical injury. In addition, 7,3% (n=26) of patients survived. Bystanders attempted CPR before ambulance arrived in 27,2% (n=97) of cases. In cases where CPR was performed by bystanders, ambulance specialists were 2,5 times more likely to register a potentially shockable rhythm on the primary electrocardiogram (19,6% and 7,7%, respectively; p=0,001), 2,2 times more often performed defibrillation (22,7% and 10,4%, respectively; p=0,003). When defibrillation was performed, the proportion of survivors was 3,9 times higher than without defibrillation (20,4% and 5,2%, respectively; p=0,001).Conclusion. Conducting CPR by OHCA bystanders increases the success rate of CPR performed by ambulance team. However, bystanders rarely provide first aid, which causes a high mortality rate. To reduce mortality in OHCA, the attention should be focused on the development, implementation and regulatory support of measures aimed at involving the population in providing first aid. This should include regular population training in CPR, widespread popularization of first aid, remote provision of CPR instructions by emergency dispatchers to untrained OHCA bystanders and ensuring the availability of automated external defibrillators.
Combined use of beta-blockers and non-dihydropyridine calcium channel blockers: possible or contraindicated?
Authors: Yakushin S. S. , Pereverzeva K. G. 
Published: February 2024

One of the most effective medications used for various cardiac diseases and syndromes to improve symptoms and, in some cases, prognosis, are betablockers (BBs) and calcium channel blockers (CCBs). The combination of BBs and dihydropyridine CCBs has a synergistic clinical effect and is well tolerated. The clinical effects of a combination of beta blockers and non-dihydropyridine CCBs (verapamil, diltiazem) are also synergistic. However, this combination increases the incidence of side effects and complications of drug therapy.The article discusses the controversial issues of such a combination and substantiates the main conclusion that the discussed combination is not applicable in routine practice. This position should be clearly reflected in all Russian cardiology guidelines. However, the article discusses the possible combined use of BBs with nondihydropyridine CCBs in isolated cases, excluding contraindications, taking into account almost daily monitoring of tolerability, individual characteristics of the patient and by decision of a medical team.
Triple fixed-dose combination of amlodipine, indapamide and perindopril for hypertension in patients with stable coronary artery disease and abdominal obesity
Authors: Polyakova E. A. , Khalimov Yu. Sh. 
Published: February 2024

Aim.In an open-label clinical trial, to evaluate the effectiveness and impact on metabolic parameters of triple antihypertensive combination therapy with amlodipine, indapamide and perindopril arginine (perindopril A) in patients with hypertension (HTN) and stable coronary artery disease (CAD) in combination with abdominal obesity (AO), who have not had an adequate response to dual antihypertensive therapy for at least 4 weeks.Material and methods.The study included 68 adult patients aged 42 to 64 years (51 (47; 60) years) with AO, stable CAD and uncontrolled HTN, despite treatment with two drugs: an angiotensin-converting enzyme (ACE) inhibitor and a thiazide and thiazide-like diuretic. In the study, patients, in accordance with the general characteristics of the drug, after prescribing a free triple-dose combination of amlodipine, indapamide, perindopril in appropriate dosages, received one of the following combination of amlodipine/indapamide/perindopril for 24 weeks: group 1 (n=34) — 10/2,5/10 mg and group 2 (n=34) — 5/1,25/5 mg, one tablet daily. The analysis of the primary endpoint was to assess the change in mean systolic blood pressure (SBP) and diastolic blood pressure (DBP) in the sitting position from baseline to 24 weeks. Secondary efficacy endpoints included the proportion of patients achieving target mean SBP and DBP values for this category in the sitting position of 120-130 mm Hg and 70-79 mm Hg, respectively, at 12, 16, 20 and 24 weeks. Safety was assessed throughout the study. The effect on metabolic parameters was assessed at 24 weeks of the study.Results.Sixty-seven (98,5%) patients completed the study. The mean decrease in blood pressure from the initial level (group 1159/96 mm Hg; group 2161/95 mm Hg) to 24 weeks (group 1 126/76 mm Hg; group 2 132/84 mm Hg) was significant (p<0,0001 for all). The proportion of patients who reached the target mean values of SBP (120-130 mm Hg) and DBP (70-79 mm Hg) in the sitting position by 24 weeks was 80,16% and 79,28% in group 1, respectively; in group 2 — 65,32% and 70,06%, respectively. No serious adverse events were recorded. Its administration, regardless of the doses of individual components in combination, was accompanied not only by metabolic neutrality in relation to carbohydrate, lipid and purine metabolism, a decrease in chronic inflammation, but was also associated with a decrease in serum leptin concentration and subcutaneous adipose tissue, an increase in tissue sensitivity to leptin, as well as a decrease in the size of adipocytes in subcutaneous fat.Conclusion.Triple fixed-dose of amlodipine/indapamide/perindopril in two different dosages is effective, safe and well tolerated in patients with HTN and stable CAD in combination with AO.
Serum levels of neuregulin-1 in patients with coronary artery disease: clinical and pathogenetic aspects
Authors: Zakharyan E. A. , Ushakov A. V. 
Published: February 2024

Aim. To determine the relationship between the serum level of neu-regulin-1 (NRG-1) and the severity of coronary artery (CA) atherosclerosis and clinical and paraclinical characteristics of patients with coronary artery disease (CAD).Material and methods. The study included 264 people, of which 220 were patients diagnosed with coronary CAD. The patients underwent coronary angiography using the Synergy between Percutaneous Coronary Intervention with TAXUS and Cardiac Surgery (SYNTAX) score and echocardiography. The patients were divided into groups according to SYNTAX score: group 1 — with moderate CA atherosclerosis (≤22 (n=124); group 2 — with severe CA atherosclerosis (23-32) (n=53); group 3 — with extremely severe CA atherosclerosis (≥33) (n=43). Group 4 was represented by healthy volunteers (n=44). All subjects underwent a study of the serum NRG-1 (ng/ml) level. Statistical processing of the results was carried out using Statistica 10.0 software. Differences were considered significant at p<0,05.Results. Significantly higher NRG-1 values were obtained in the control group compared to patients with CAD (p<0,001). An inverse correlation was found between the NRG-1 concentration and the severity of CA atherosclerosis (p<0,001). A decrease in NRG-1 concentration is associated with a high functional class of = heart failure (p<0,01) and low left ventricular ejection fraction (p<0,001). The significance of NRG-1 differences between groups of patients with a history of myocardial infarction (p<0,001), angina pectoris (p<0,01), permanent atrial fibrillation (p<0,01), chronic left ventricular aneurysm (p<0,01) and repeated myocardial infarction (p<0,05) in comparison with patients without these pathologies.Conclusion. The identified correlations between the NRG-1 concentration and CAD, as well as the clinical and paraclinical characteristics of patients, makes it possible to consider NRG-1 as a reliable biomarker of CA and heart failure severity and may form the basis for the development of novel diagnostic approaches.
Karakteristik ikan tandipang (Dussumeiria acuta) asap
Authors: Rakhmayeni Dyah Ayu , Yuniarti Tatty , Sukarno Sukarno , Prayudi Adham 
Published: February 2024

Pengasapan merupakan perpaduan teknik pengeringan serta penambahan senyawa kimia hasil pembakaran kayu guna mempertahankan daya awet ikan. Tujuan penelitian ini adalah menentukan profil kimia dan keamanan pangan ikan tandipang asap dengan perbedaan konsentrasi dan lama perendaman asap cair. Metode yang digunakan adalah eksperimental dengan rancangan percobaan yang digunakan yakni rancangan acak kelompok faktorial (RAK) dengan 3 kali ulangan. Variabel yang diamati adalah konsentrasi asap cair (1, 3, dan 5%) dan lama perendaman (15, 30, 45, dan 60 menit). Parameter yang diuji yaitu proksimat, fenol, formaldehida, PAHs dan TPC. Hasil proksimat ikan tandipang asap cair menunjukkan kadar air 8,61-28,89%; abu 4,37-6,20%; lemak 1,91-6,75%; dan protein 62,21-81,56%. Perlakuan terpilih berdasarkan hasil uji hedonik (kesukaan) dengan nilai tertinggi pada atribut rasa untuk ikan asap dengan perlakuan konsentrasi asap cair 3% dan lama perendaman 45 menit dengan nilai 7,2. Profil kimia ikan tandipang asap terpilih yaitu pada perlakuan konsentrasi asap cair 3% dengan lama waktu perendaman selama 45 menit memiliki kadar air 23,77%; abu 5,64%; lemak 4,99%; protein 76,33; fenol 0,356 %; PAHs < 0,1 ppb; dan formaldehid < 0,003%.
Deep Learning Estimating of Epicentral Distance for Earthquake Early Warning Systems
Authors: Noda Shunta 
Published: February 2024

ABSTRACT
To enhance the performance of earthquake early warning (EEW) systems that aim to issue alerts as quickly as possible, it is crucial to improve the accuracy of the epicentral distance Δ estimated via the single-station method. Although the conventional method estimates Δ from the slope of the initial P-wave envelope, this study applies deep learning techniques that can extract a variety of information from the waveform data. By analyzing ∼20,000 records observed at Kyoshin Network stations in Japan, the convolutional neural network (CNN) method achieved higher accuracy than the conventional method. Increasing the data length or the number of iterations of convolution, activation, and pooling layers in the typical CNN model did not significantly improve the accuracy of Δ estimation. An automatic structure search (AutoSS) technique, in which model structure and hyperparameters are randomly varied, was employed to identify models that yield higher accuracy. A typical CNN model was used as the initial structure. The models obtained through this technique showed improved accuracy with increased data length or computational cost. The models that delivered the highest accuracy among those generated using the AutoSS technique outperformed the typical CNN model in terms of accuracy, although their computational costs were comparable. The AutoSS technique offers a significant advantage in that it allows the selection of a model that matches the computational capabilities of the hardware used for its implementation, thereby ensuring optimal computational efficiency. This exhibits that deep learning technologies can be used to improve the performance of EEW systems.
Estágio Curricular Supervisionado: relato da experiência discente em uma unidade básica de saúde
Authors: Vieira Justino Thaysa Maria , Gonçalves Barbosa Kalliny Mirella , Araújo Ribeiro Fernanda Maria , Fernandes Pereira Emily , Amaral Camelo Calheiros Rillary , Sales Ribeiro Francielma , Sheila Sarmento Sued 
Published: February 2024

Objetivo: relatar experiências vivenciadas por estagiárias de enfermagem, da Universidade Federal do Vale do São Francisco, durante as atividades de estágio em uma Unidade Básica de Saúde do município de Petrolina-PE. Trata-se de um estudo descritivo, do tipo relato de experiência, desenvolvido a partir da atuação das estagiárias em um serviço de atenção básica no período de janeiro a abril de 2022. Descrição da experiência: As atividades desenvolvidas durante esse período mostraram os desafios que envolvem a rotina do profissional de enfermagem, bem como suas atribuições e responsabilidades com a população adscrita. Destaca-se que a experiência permitiu a aproximação com o Sistema Único de Saúde em um contexto de pandemia, sendo possível identificar as dificuldades enfrentadas na rotina e a necessidade de reinventar o processo de trabalho para garantir assistência de qualidade aos usuários. As atividades desenvolvidas e/ou acompanhadas foram: atendimento aos sintomáticos respiratórios; atendimento às pessoas com arboviroses; notificação de doenças e agravo; vacinação; saúde da mulher e planejamento familiar e reprodutivo; pré-natal; desfecho de gestação; saúde da criança e adolescente; ações voltadas ao rastreio e tratamento de casos de hanseníase; curativos e outros procedimentos; consulta compartilhada; visita domiciliar; territorialização e perfil epidemiológico; e gerenciamento de serviços de saúde. Conclusões: O Estágio Curricular Supervisionado configurou-se como ferramenta importante para o crescimento pessoal e profissional, a partir da aproximação com o cenário de trabalho e vivências que exigiam o raciocínio clínico para a tomada de decisão em enfermagem.