bluuebunny/crossref_metadata_2025 huggingface dataset:
Semiotics Analysis on Maanagaram (2017)
Authors:   Post Graduate student, Department of Visual Communication Loyola College (Autonomous), Chennai, Tamil Nadu, India, E Seshadri
Published: December 2022

The study based on the semiotic analysis of the movie Maanagaram (2017) by understanding the role of mise-en-scene in effective narration.. This is done in both the visual arts through storyboarding, visual theme, cinematography, as well as in narrative storytelling through direction.All though the script is complicated the screenplay was very engaging and a the characters in the movie were we developed and relatable to the audience.All though the script is complicated the screenplay was very engaging and all the characters in the movie were we developed and relatable to the audience.Semiotic analysis is an important approach for fully comprehending the nuance of a film. This method seeks to establish the relationship between the Signifier and the Signified, as well as how they produce a meaningful interpretation.
Classification of three-dimensional isopotent algebras
Authors: CEDILNIK Anton
Published: December 2022

In the article, we perform a classification of algebras with dimensions $\leq$ 3 and with the property that each element is colinear with its square. The classification is complete up to properties of the ground field.
Methods for Treatment of Animal and Plant-Based Biomass Waste
Authors: Rostocki Andrzej , Ławińska Katarzyna , Modrzewski Remigiusz , Siegień Gabriel , Hejft Roman , Obraniak Andrzej
Published: December 2022

In the work presented, effective methods of biomass processing for its reuse in the framework of the circular economy were determined. Based on various sources, a definition of biomass was obtained. The review covers preliminary operations, i.e., screening and grinding, as well as the methods of pressure and non-pressure agglomeration of plant and animal biomass, as well as the process of torrefaction of plant biomass. The analysis of the literature indicates various process and technological solutions for biomass processing, as well as provides numerous examples of the use of biomass in combination with other types of industrial waste and mineral additives. The activities undertaken as part of the work are consistent with the assumptions of the European Green Deal and are carried out in order to improve the management of waste streams (green productivity) and to increase the amount of recovered energy produced.
Research on Consumers’ Perceived Value of Online Garment Customisation
Authors: Ruolin Wang , Kaixuan Liu
Published: December 2022

With the development of the Internet, consumers began to pursue personalised services and products. However, little systematic research on consumers’ online garment customisation behavior has been conducted. Garment customization enterprises rely on consumer behaviour which is difficult to accurately judge. In order to better understand online consumers’ purchase intention of garment customization, this paper studies consumers’ perceived value. Through literature reading, group discussion and other methods, this paper constructed a theoretical model of eight measurement dimensions, and conducted factor analysis on the 321 questionnaires collected. Five key dimensions were obtained: the website comprehensive function, personalised service, product quality, emotional demand and social value. To test the comprehensive attitude of consumers to the results of this model, a fuzzy comprehensive evaluation was carried out. The results show that consumers have a high degree of recognition of the research results and acceptance of the research model, among which the recognition of product quality and website comprehensive function are the highest.
Fabric Composition and Wearability Analysis of Zhuanghua
Authors: Sun Ying , Liu Zheng , Silberman Jeffrey , Hou Jue , Dai Jian
Published: December 2022

Zhuanghua is a representative variety of Nanjing Yun brocade, symbolising the highest achievement of ancient Chinese textile technology. It has been widely used as a clothing fabric since its appearance. This paper firstly explored the characteristics of weaving materials, fabric weaves, and fabric weaving of Zhuanghua based on a literature review, manufactory visiting, and a market survey. To preserve the textile application, the permeability, shape preservation property, and appearance preservation property of fabric were tested for wearability. Specifically, six pieces of Zhuanghua satin were selected as the primary samples, along with six pieces of customised plain satin as the matching samples. Influenced by the Zhuangzhi technique, the Zhuanghua satin presented the following features. The thickness and air permeability of the Zhuanghua satin varied between patterned and non-patterned parts. The Zhuanghua satin in the weft direction showed higher tensile strength, stronger stiffness, and weak crease recovery ability. The average weft elongation at break of Zhuanghua satin increased by 25% and the weft flexural rigidity by 3–8 times, while the average weft crease recovery angle decreased by nearly 30°. The performance of anti-fuzzing and anti-pilling was improved, and the grades increased by 1 and 2, respectively. The study is conducive to a more scientific understanding and development of Yun brocade.
Research on the Creative Application of Origami Performance Techniques in Clothing
Authors: Wang Chenlu , Yang Chen , Li Junlan , Zhu Mingxuan
Published: December 2022

Origami has various manifestations and rich production techniques, and it is regarded as one of the indispensable contemporary art forms. In order to enrich the creative expressions of fashion design, this paper summarises the creative application forms of origami art in fashion design from the external and moulding characteristics of origami, studies the fabric characteristics through experimental verification, and summarises the applicable techniques of expression. The results show that the folding application forms of origami art and clothing modelling can be realised by using the expression methods of ironing and crimping, stitching texture moulding and repeated combination moulding, that is, pattern deformation folding application, fabric transformation folding application and modular combination folding application. The application of the folding form in clothing three-dimensional modelling and surface texture can give full play to the unique modelling beauty and artistic style of origami art and provide a reference for creative ideas in clothing design.
Prediction of Mechanical Properties of Woven Fabrics by ANN
Authors: Elkateb Sherien N.
Published: December 2022

This study aims to obtain an accurate prediction model of mechanical properties of woven fabric to achieve customer satisfaction. Samples of plain woven fabric were produced from different yarn counts and blend ratios of cotton and polyester of weft yarn at different weft densities. Mechanical properties such as tensile strength, bending stiffness and elongation% in both the warp and weft directions were tested. The prediction model was based on Artificial Neural Networks (ANNs). For each model, thirty-nine samples were used for training and fifteen for testing prediction performance. Findings indicated that the ANN achieved a perfect performance in predicting all properties.
Impact of body mass index on parameters of the left atrium: cardiac computed tomography study
Authors: Verhovceva Viktorija , Zvaigzne Ligita , Jubele Kristīne , Kalējs Oskars
Published: December 2022

Increased Body Mass Index (BMI) is often used as a predictor for cardiovascular diseases, and it is also known to be associated with left atrial enlargement, potentially affecting anatomic structures of the left atrium. The aim of the study was to determine the association between BMI and parameters of the left atrium, including characteristics of the pulmonary veins (PVs), found in cardiac computed tomography (CT) scan. The retrospective study included 140 patients with a mean age of 66.9 years (SD = 7.8). There were statistically significant correlations between BMI and volume changes of the left atrium during the cardiac cycle: Vmax (rs = 0.199, p = 0.023), Vmin (rs = 0.177, p = 0.043), Vmean (rs = 0.190, p = 0.029), which supports previously known data. The study also revealed unique associations regarding the impact of BMI on PV structures. There was a significant correlation between BMI and PV orifice size in the left inferior PV (rs = 0.216, p = 0.032) and the right accessory PV (rs = –0.629, p = 0.012). The right PV angle was positively correlated with BMI (rs = 0.178, p = 0.044), while the angle between left PVs did not show any correlation with BMI (p = 0.436). The results support previously known associations between increased BMI and left atrial enlargement and show a statistically significant effect of increased BMI on the characteristics of pulmonary veins.
Sepsis and multiple organ dysfunction syndrome as the first clinical presentation of Wilson's disease: case report
Authors: Zeltiņa Indra , Dreimane Katrīne , Paeglīte Sandra , Derovs Aleksejs
Published: December 2022

Wilson’s disease (WD) is a rare autosomal recessive disorder caused by a mutation in the ATP7B gene. The evolution of Wilson’s disease is the result of the accumulation of copper in affected tissues. In this study, we report on a 30-year-old patient with multiple organ dysfunction syndrome and sepsis. After the necessary investigations and genetic tests, the patient was diagnosed with WD. Unfortunately, the first symptoms appeared at least ten years ago with elevated liver transaminases and amenorrhea. It is possible that if any of the previous physicians had provided a detailed examination, the patient would have reached a diagnosis sooner. The patient received adequate penicillamine treatment and her condition improved. The patient manages to have a healthy child by slightly changing the treatment of Wilson's disease. This case demonstrates that proper examination and collection of anamnesis information can lead to a diagnosis of WD. In addition, we emphasise the importance of targeted testing for elevated transaminases, especially if the patient has amenorrhea at reproductive age. Wilson's disease is not a barrier to carrying a healthy child. Of course, more research is needed to develop the best treatment and disease management plans.
Dynamics of the number of emergency medical divisions in the Russian Federation
Authors: Hominets V. V. , Miroshnichenko A. G. , Makhnovskiy A. I. , Barsukova I. M. , Gladneva V. V.
Published: December 2022

Objective. The analysis of number and types of divisions of SMP, their dynamics in the Russian Federation during 2014–2020 was a research objective.

Materials and methods: Served as material given federal state statistics, sources are FSN No. 30, 2014–2020; statistical collection «Health Care of Russia», 2021 (Rosstat). Statistical and analytical methods are used.

Results: as a result of a research negative dynam- ics of number of stations and offices of SMP (for 33.4%) and volumes of the provided pre-hospital emer- gency medical service (for 13.0%), growth of number of office of the emergency advisory help and medical evacuation (for 20.2%), the centers of medicine of accidents and emergency medical service (for 73.9%) and also divisions of emergency medical service of a stationary stage is revealed (for 37.8%).

Conclusion. The state program of the Russian Federation «Development of health care» sets a task of increase in efficiency of rendering emergency medical service. The important directions of its development are creation of a uniform regional system of scheduling, development of emergency medical service, sanitary aircraft, formation of the uniform centers of emergency medical service and medicine of accidents, development of a stationary stage of emergency medical service.
Analysis of shortcomings, obstacles and problems in the practice of pain-reliaf at the prehospital stage of care for patients with traumatic injuries
Authors: Sharipova V. Kh. , Akalaev R. N. , Eshboev A. T. , Stopnitskiy А. А.
Published: December 2022

Goal of study. Identification of shortcomings, obstacles and problems in the implementation of pain-relief in patients with concomitant injuries by questioning.

Material and methods. A survey of 400 emergency physicians was conducted. The questionnaire consisted of 18 questions with multiple choice of answers. The average age of doctors who completed the survey was 53,5±3,4 years, men — 275 (67,5%), women — 130 (32,5%).

Results. Questioning of doctors revealed insufficient knowledge of emergency medical doctors about modern aspects of prehospital pain-relief, about the use of pain rating scale in practice. 80% of the respondent’s preferred pain-relief with metamisol, 17% preferredopioids. 95% of doctors surveyed believe that the use of narcotic analgesics will take in difficult to further diagnose impaired consciousness.

Conclusion. There are problems and shortcomings in implementation of pain-relief at the prehospital stage in patients with a combined injury, requiring improvement of the training program, including special lectures and practical exercises on the problem of pain-relief and aspects of care for patients with a combined injury.
Distance assistance for first aid in trauma: literature review and a draft of the dispatcher algorithm
Authors: Birkun A. A. , Bagnenko S. F. , Dezhurny L. I.
Published: December 2022

Being a common cause of death and disability, injuries remain a highly relevant global public health problem. In Russia, injuries hold one of the leading positions in the structure of mortality of the population, causing significant social and economic losses for the country. While the likelihood of saving lives and preventing severe complications in injuries largely depends on the ability of witnesses of the incident to early and correctly provide first aid (FA) to the victims, the actual frequency of providing FA remains low. A promising way to involve untrained people in the process of providing FA is to remotely instruct witnesses of the incident by emergency dispatchers on how to give FA. This article discusses international experience of dispatcher assistance for FA in trauma and presents a draft of a universal Russian-language algorithm for remote dispatcher interviewing and advising witnesses of the incident on provision of FA in trauma, that was developed taking into account the current Russian and international guidelines. The algorithm is proposed for further appraisal and implementation in the practical work of emergency dispatchers as a basic component of the federal program of dispatcher assistance for FA.
Evaluation of the efficiency and safety of emergency medical care with uncontrolled arterial hypertension
Authors: Ruksin V. V. , Grishin O. V. , Kitsyshin V. P. , Lukyanova I. Yu.
Published: December 2022

In 91 patients with uncontrolled arterial hypertension, the efficacy and safety of combinations of antihypertensive drugs were compared. 30 patients received a combination of captopril and furosemide; 32 — moxonidine and furosemide; 29 — moxonidine and nifedipine. Drugs were prescribed by fixed randomization using a table of random numbers. It is shown that the combination of captopril and furosemide has a sufficient, but not stable antihypertensive effect, moxonidine and nifedipine, moxonidine and furosemide — a sufficient and stable effect. When using moxonidine and nifedipine, a significantly higher frequency of excessive lowering of blood pressure was detected. The proposed method of registration and evaluation of blood pressure monitoring of funds is easily feasible at the pre-hospital stage.
Hemorrhagic complications in urgently hospitalized patients with severe novel coronavirus infection COVID-19
Authors: Kulikov A. N. , Teplov V. M. , Korshunova A. А. , Kovalchuk Yu. P. , Kadinskaya M. I. , Lapin S. V. , Archangelsky N. D.
Published: December 2022

The purpose of this work was to study the features of the development of hemorrhagic complications in patients with bilateral viral pneumonia associated with COVID-19 of severe course, delivered to the hospital for emergency indications. The study included 561 patients with bilateral viral pneumonia. Various variants of bleeding were noted in 45 cases, all of them occurred in patients with severe new coronavirus infection (39 patients or 6.95% of all patients with severe NCI and 4.11% among all examined patients). Cases of combined hemorrhagic events were noted in 4 patients. In addition to age, gender, obesity and comorbidity, the use of antiplatelet therapy played a key role in the development of bleeding, which indicates the need to reduce the daily doses of such drugs at the later stages of treatment.
Мedical and social aspects of nursing care in case of mass admission of victims on the example of the terrorist attack on 03.04.2017 in St. Petersburg
Authors: Kasimovskaya N. A. , Lavrova E. A.
Published: December 2022

Introduction. The active development of the Russian nursing service of a medical organization operating in the conditions of modern realities, namely, increased readiness, needs further scientific and methodological support in the field of practical recommendations in emergency situations (ES).

Target. Determine the medical and social portrait of the victims of the terrorist attack in the St. Petersburg metro on 04/03/2017, admitted to the St. I. I. Janelidze (hereinafter referred to as the Institute) and analyze the quality of nursing care provided to them. Materials and research methods. A medical and social portrait of the victims of the terrorist attack on April 3, 2017 in St. Petersburg, who were admitted to the Institute for medical care, is presented. When performing the main source of information were specially designed questionnaires (out of 25 received victims, in view of their condition and for ethical reasons, 20 people were questioned). The main research methods are sociological, analytical, descriptive statistics.

Results and its discussion. It was revealed that the average social portrait of a victim of a terrorist attack in the St. Petersburg metro on April 3 is as follows. Female or male, 19 to 30 years of age, working, single/single, needs some assistance with self- care after a medical emergency. In most patients, the time to provide emergency medical care ranged from 30 minutes to 1 hour. When providing emergency medical care to patients, every second nurse observed the principles of ethics and deontology. Problems were identified in the implementation of some nursing procedures, which requires further attention when conducting exercises to work out the actions of nursing personnel in emergencies.

Conclusion. The identified problems require the development and implementation of algorithms, methodological support, for organizing the actions of nursing staff in order to improve the quality of care in emergencies.
Prevalence of аcute articular syndrome. Literature review and own data
Authors: Povzun A. S. , Mazurov V. I. , Shchemeleva E. V. , Povzun K. A. , Kovalchuk E. Yu. , Kostenko V. A.
Published: December 2022

The study of the occurrence of articular syndrome in general, and acute articular syndrome (AAS) in particular, is an important medical and social task, the solution of which makes it possible to determine the amount of necessary forces and means for the organization of medical care for these patients. Since 2008, the authors have been studying the features of diagnosis and treatment of patients with AAS, for the first time in the Russian Federation on the basis of the St. Petersburg Research Institute of Emergency Medicine named after I. I. Dzhanelidze introduced the concept of providing medical care to patients with AAS into clinical practice. The study of data on the prevalence of articular syndrome allows us to outline ways to optimize diagnostic and therapeutic algorithms, reducing the time of diagnosis of diseases and optimizing the duration of the inpatient stage of treatment.
INFORMATION MAIL ALL-RUSSIAN SCIENTIFIC AND PRACTICAL CONFERENCE “STATE AND STRATEGY FOR THE DEVELOPMENT OF EMERGENCY MEDICINE” APRIL 20-22, 2023
Authors: Editorial Article
Published: December 2022

.
Moringa oleifera extract and neostigmine confer neuroprotection on aluminium chloride -induced Alzheimer’s disease: Antioxidant and acetylcholinesterase inhibitory activities
Authors: Finbarrs-Bello Elizabeth , Jude Okamkpa Chikezie , Ekene Okoro Gabriel
Published: December 2022

Alzheimer’s disease (AD) is a neurological episode associated with the senescence process characterized by neuronal cell death in brain regions and loss of cognition. The study investigate the neuroprotective potentials of Moringa oleifera leaf extract and Neostigmine in a rat model of Alzheimer’s disease induced by Aluminium chloride (AlCl3). A total number of 20 rats weighing 180-240 kg were used for this study and they were grouped into 5 with 4 rats in each group (n=4) labelled A-E. Group A control, received 0.1 mL normal saline (placebo), Group B, received 100 mg/kg of Aluminium chloride, Group C was given Aluminium chloride 100 mg/kg and 200 mg/kg, Group D experimental animals received Aluminium chloride 100 mg/kg and were treated with 400 mg/kg of the extract orally for 21 days, while Group E received the same dose of Alcl3 and 2 mg/kg Neostigmine given intraperitoneal (IP). Thereafter, the rats were sacrificed, and the hippocampi were harvested for histology and histochemical analysis. Our findings revealed visible protective changes in the group treated with the M. oleifera and Neostigmine as the pyramidal cells of CA3 and neurofibrillary tangles which were prominent in the positive control group were resolved. At the end of this study, it was proven that the toxicity induced by Aluminium chloride was reduced by M. oleifera leaf extract and Neostigmine. M. oleifera is a commonly consumed plant therefore the intake should be encouraged.
Performance Analysis of Different Flexible Decoding Algorithms for NR-LDPC Codes
Authors: Salih Layla M. , Al-Qaradaghi Thuraya Mahmoud Ali , Ameen Jalal Jamal Hamad
Published: December 2022

Channel coding technique is a fundamental building block in any modern communication system to realize reliable, fast, and secure data transmission. At the same time, it is a challenging and crucial task, as the data transmission happens in a channel where noise, fading, and other impairments are present. The Low-Density Parity-Check (LDPC) codes give substantial results close to the Shannon limit when the complexity and processing delay time are unlimited. In this paper, the performance of the LDPC decoding with four algorithms was investigated. The investigated four algorithms were Belief Propagation (BP), Layered Belief Propagation (LBP), Normalized min-sum (NMS), and Offset min-sum (OMS). These algorithms were examined for code rates ranging from 1/3 to 9/10 and message block lengths (64, 512, 1024, and 5120) bits. The simulation results revealed the flexibility of these decoders in supporting these code rates and block lengths, which enables their usage in a wide range of applications and scenarios for fifth-generation (5G) wireless communication. In addition, the effect of the maximum number of decoding iterations on the error correction performance was investigated, and a gain of 5.6 dB can be obtained by using 32 decoding iterations at BER=2*10-3 instead of one decoding iteration. The results showed that the decoders performed better for longer message blocks than for short message blocks, and less power was required for transmitting longer messages. Finally, the comparison results of their performance in terms of bit error rate (BER) under the same conditions showed a gain of 0.8 dB using LBP at BER= 10-5 compared with the NMS decoding algorithm.
Counterfactual Thinking and the Identity Problem: The Casus of Communication about Genetic Risks
Authors: Lavrentyeva Sofya Vsevolodovna
Published: December 2022

The subject of this article is counterfactual thinking as a tool in geneticist-patient communication under conditions of uncertainty. The article focuses on the use of the counterfactual narrative as one of the main components of doctor-patient communication in the framework of making decisions about future treatment. The conditions for the use of the counterfactual narrative are considered, taking into consideration two features: the logic of predetermination and the influence of overpersonal forces and notions of kinship that contribute to the deindividualization of the patient. Based on A.S. Karpenko's formulation of the concept of possibility, a heuristic approach to sketching possible scenarios for treatment during genetic counseling is outlined. The novelty of the study lies in the analysis of the problem of self-future identity, constructed by the patient in the counterfactual narrative. This problem is examined using two thought experiments. The first thought experiment (concerning the fate of the unborn child - D. Bunin) reveals the identity problem itself. The second (concerning non-derministic behavior of a flipped coin - C. Dorst) shows how this problem is disclosed under conditions of uncertainty. It is shown that in creating possible scenarios of disease and its treatment with counterfactuals it is important to take into account "necessary properties" (U. Eco) of the patient, focusing on qualitative, not numerical identity. In the last section of the article this conclusion is justified in the light of the concept of narrative identity, through which the counterfactual can be revealed.
Perfil do consumo de medicamentos para prevenção e tratamento da COVID-19 entre estudantes de uma universidade pública
Authors: Rosa Larissa Couto , Guimarães Paula Picoli , Carnielli-Queiroz Lorena
Published: December 2022

Objetivo: Avaliar o perfil do consumo de medicamentos para prevenção e tratamento da COVID-19 dentro de um contexto universitário e identificar as principais causas de automedicação. Métodos: Trata-se de estudo transversal descritivo, conduzido com 1187 indivíduos, de ambos os sexos. Os usuários foram investigados quanto a suspeita da COVID-19 e as dúvidas relacionadas ao uso de medicamentos durante a infecção. Os dados obtidos foram tabulados e analisados por meio do software Microsoft Excel®. A pesquisa está pautada na resolução do Conselho Nacional de Saúde (CNS) 466/12 com aprovação pelo Comitê de Ética em Pesquisa. Resultados: Dos entrevistados, 54,3% (644) apresentaram suspeita da COVID-19. De maneira geral, a azitromicina foi o medicamento mais utilizado. A maioria dos estudantes (99,2%) alegaram saber o conceito de automedicação. Dos 109 que realizaram essa prática, 93,6% utilizaram a ivermectina e 65,1% fizeram por indicação de familiares e amigos por acreditarem que ajudaria a prevenir a infecção. Conclusão: A automedicação entre os estudantes universitários foi influenciada pela insegurança advinda da pandemia da COVID-19 e suas relações pessoais além do excessivo número de informações divulgadas por diversos meios de comunicação
ANALISIS FAKTOR-FAKTOR YANG MEMPENGARUHI KINERJA PROFITABILITAS BANK UMUM SYARIAH (BUS) DI INDONESIA
Authors: Elena  , Nurwahidin
Published: December 2022

Perkembangan perbankan syariah di Indonesia terus menggeliat dari waktu ke waktu. Bank syariah terbukti mempunyai daya tahan yang kuat dalam menghadapi hempasan badai krisis keuangan tahun 1998 dan 2008. Bank syariah tetap stabil dan memberikan keuntungan, kenyamanan serta keamanan bagi nasabahnya. Studi ini bertujuan untuk mengetahui faktor-faktor yang mempengaruhi kinerja profitabilitas bank umum syariah (ROA – Return on Assets) di Indonesia dan terbatas pada rasio keuangan, yaitu: Rasio Pembiayaan Bagi Hasil, FDR (Financing to Deposit Ratio), NPF (Non Performing Financing), BOPO (Biaya Operasional terhadap Pendapatan Operasional) dan CAR (Capital Adequacy Ratio). Hasil dari penelitian ini menjelaskan hasil uji koefisien determinasi dengan nilai Adjusted R squared sebesar 0,971570 yang menunjukkan bahwa variabel bebas memiliki kontribusi menjelaskan variasi variabel terikat ROA sebesar 97,15%. Adapun rasio pembiayaan bagi hasil, FDR, NPF, BOPO dan CAR bank umum syariah berpengaruh secara simultan terhadap ROA bank umum syariah selama periode 2015 – 2020.
INFLUENCE OF ALUMINUM POWDER ALLOYS ON COMPLETE COMBUSTION OF MIXED COMPOSITIONS
Authors: Корниенкова А.В. , Змановский С.В. , Певченко Б.В. , Зяблицкий С.А. , Панченко Н.Ф. , Егорова Л.Г.
Published: December 2022

Использование металлизированного горючего в составе современных высокоэнергетических смесевых композиций (СК) приводит к образованию массы остатков конденсированных продуктов сгорания (КПС) и снижению баллистической эффективности двигательных установок. Значительное накопление КПС на внутренней поверхности камеры двигательной установки может приводить к появлению проблем, связанных как с энергетической эффективностью системы, так и с нарушением целостности ее конструкции. Агломерация оказывает решающее влияние на эффективность использования металлизированных КС в качестве наполнителя в двигательных установках (ДУ), поскольку размер частиц определяет время их сгорания. Слияние частиц металлического горючего нередко приводит к образованию на поверхности горения заряда крупных агломератов, размер которых на порядок превосходит самые крупные частицы исходного порошка металла. Накапливающиеся в корпусе энергетической установки остатки КПС, являясь пассивным весом, снижают ее энергетическую эффективность. Поиск способов решения этой проблемы актуален и для современных ДУ, работающих в новых условиях. Авторами предложен один из способов снижения агломерации при горении СК на основе активных горючих-связующих и модифицированного алюминия. Показана возможность снижения интенсивности агломерационных процессов при использовании сплавов алюминия с металлами переменной валентности.

The use of metallized fuel in the composition of modern high-energy mixed compositions leads to the formation of a mass of residues of condensed combustion products and a decrease in the ballistic efficiency of propulsion systems (PS). A significant accumulation of condensed combustion products on the inner surface of the chamber and the recessed nozzle can lead to problems associated with both the energy efficiency of the system and the violation of the integrity of its design. Agglomeration has a decisive influence on the efficiency of using metallized high-energy systems as fuel in PS, since the particle size determines the time of their combustion. The fusion of metal fuel particles often leads to the formation of a charge of large particles on the combustion surface, the size of which is an order of magnitude larger than the largest particles of the original metal powder. The remnants of the CPS accumulating in the body of the power plant, being the passive weight of the plant, reduce its energy efficiency. The study of this problem and the search for ways to solve it remain relevant for modern propulsion systems operating in new conditions of use. The article considers one of the ways to control agglomeration during the combustion of mixed compositions based on active combustible binders and modified aluminum grades. The results of experimental studies have shown the possibility of reducing the intensity of sintering processes when using aluminum alloys with metals that provide an increase in the completeness of combustion of metallic fuel.
INFLUENCE OF THE MAGNETIC REYNOLDS NUMBER ON THE HEAT TRANSFER OF A LIQUID IN A SPHERICAL LAYER
Authors: Соловьев С.В.
Published: December 2022

Приведены результаты численного моделирования неустановившегося конвективного теплообмена и магнитной гидродинамики электропроводящей жидкости в концентрическом сферическом слое. Исследовано влияние малых значений магнитного числа Рейнольдса и диссипации джоулева тепла на эволюцию структуры течения жидкости, поле температуры, магнитной индукции и распределение чисел Нуссельта.

The results of numerical simulation of transient convective heat transfer and magnetohydrodynamics of an electrically conductive fluid in a concentric spherical layer are presented, taking into account Joule heat dissipation. The effect of small values ​​of the magnetic Reynolds number and dissipation of joule heat on the evolution of the fluid flow structure, the temperature field, magnetic induction, and the distribution of Nusselt numbers is studied.
CONSTRUCTION FEATURES OF THE INSTALLATION FOR ASSESSING THE TENDENCY OF aviation kerosene TO FORM COKE DEPOSITS
Authors: Журавлева В.Д. , Лихтерова Н.М. , Анисимов Д.И.
Published: December 2022

Современный опыт эксплуатации авиационной техники свидетельствует о том, что наиболее характерными неисправностями, связанными с высоким уровнем склонности авиакеросинов к образованию отложений, являются увеличение времени или отсутствие запуска двигателя, зависание оборотов, прогар камеры сгорания, возникающие вследствие закоксовывания коллекторов и топливных каналов форсунок основной камеры сгорания газотурбинных двигателей. В данной работе приводится обоснование конструкции установки для исследования образования коксовых отложений в топливных каналах авиационных газотурбинных двигателей. На основании анализа условий функционирования топливного коллектора с форсунками основной камеры сгорания авиационного газотурбинного двигателя произведен расчет критериев подобия процесса физической модели и форсунок авиационных газотурбинных двигателей. Исходя из рассчитанных критериев подобия процесса определены требования к режимным параметрам, и создана модельная установка для оценки склонности авиакеросинов к образованию коксовых отложений.

Modern experience in the operation of aviation equipment indicates that the most characteristic irregularities associated with a high level of tendency of aviation kerosene to form deposits are an increase of the time or lack of engine start, speed hangup, combustion chamber burnout in consequence of the coking of collectors and fuel channels of the injectors of the main combustion chamber of gas turbine engines. In this paper, the design of the installation for the study of the formation of coke deposits in the fuel channels of aircraft gas turbine engines is presented. The calculation of the similarity criteria for the process of the physical model and the nozzles of aircraft gas turbine engines was carried out on the basis of the analysis of the operating conditions of the fuel collector with the nozzles of the main combustion chamber of the aircraft gas turbine engine. Based on the calculated criteria for the similarity of the process, the requirements for the operating parameters necessary for implementation in the developed model installation were determined, as well as an installation for assessing the tendency of aviation kerosene to form coke deposits is developed
IDENTIFICATION OF THE STATE OF THE EMERGENCY SOURCE IN WATER-SOLUBLE BASES OF HYDRAULIC STRUCTURES
Authors: Нурмагомедов Т.Н. , Латышенко К.П. , Дюнова Д.Н.
Published: December 2022

В статье выполнена постановка задачи идентификации состояния источника чрезвычайной ситуации – карстово-суффозионного процесса в водорастворимых основаниях гидротехнических сооружений. Задача сводится к обеспечению максимального времени, в течение которого объем пустот в основании гидротехнического сооружения или просадка горных пород достигнет критических значений. С позиций системного подхода выполнено обоснование рациональных параметров водорастворимого основания гидротехнического сооружения. Определены параметры, влияющие на время безопасного состояния водорастворимого основания гидротехнического сооружения. Систематизированы потоки измерительной, априорной и качественной информации, используемые при мониторинге состояния гидротехнического сооружения и его основания. Предложены концептуальная модель системы идентификации состояния водорастворимых оснований гидротехнических сооружений и структура информационной системы контроля за карстово-суффозионным процессом в водорастворимом основании гидротехнических сооружений. Использование подобной системы позволит лицу, принимающему решение, в режиме реального времени получать достоверную информацию об (состоянии) объекта контроля. Это позволит заблаговременно предупредить о возможном разрушении основания гидротехнического сооружения и провести противофильтрационные мероприятия.

The article presents the problem of identifying the state of the source of an emergency situation – the karst-suffusion process in water-soluble bases of hydraulic structures. The task is to ensure the maximum time during which the volume of voids in the base of a hydraulic structure or the subsidence of rocks will reach critical values. From the standpoint of a systematic approach, the rational parameters of the water-soluble base of a hydraulic structure are justified. The parameters affecting the time of the safe state of the water-soluble base of the hydraulic structure are determined. The flows of measuring, a priori and qualitative information used in monitoring the state of a hydraulic structure and its foundation are systematized. A conceptual model of the system for identifying the state of water-soluble bases of hydraulic structures and the structure of the information system for monitoring the karst-suffusion process in the water-soluble base of hydraulic structures are proposed. The use of such a system will allow the decision-maker to receive reliable information about the (state) of the control object in real time. This will allow you to warn in advance about the possible destruction of the foundation of the hydraulic structure and carry out anti-filtration measures.
A paste fuel development with investigation of it characteristics
Authors: Богданович А.Б. , Поляков В.А. , Волков Е.Н. , Товстан Е.В.
Published: December 2022

В настоящей работе проведен комплекс исследований по созданию перспективного пастообразного горючего с минимальным содержанием окислительных компонентов (не более 0,05 % масс.) и высоким содержанием (более 50 % масс.) высокоэнергетических металлизированных добавок, которые позволяют повысить не только энергетические характеристики, но и плотность составов. Предметом исследования является методология создания совокупности перспективного пастообразного горючего и систем, способных осуществлять его подачу в камеру сгорания. Одной из составных частей методологии является разработанная в рамках настоящей работы экспериментально-теоретическая методика расчета, позволяющая проводить проектирование систем вытеснения с конструкторской проработкой ее основных узлов, и учитывающая реологические характеристики пастообразного горючего. Разработан ряд составов пастообразного горючего на основе углеводородов с различными комбинациями высокоэнергетических металлизированных добавок, а также поверхностно-активных веществ и структурирующих добавок. Спроектированы и изготовлены устройства распыла и системы, позволяющие проводить гидравлические и огневые стендовые испытания с обеспечением телеметрирования основных параметров. На разработанных системах проведены экспериментальные исследования составов пастообразного горючего, которые позволили уточнить методику расчета и подтвердить возможность ее применения при проектировании систем вытеснения.

In this work, a set of studies was carried out to create a promising paste-like fuel with a minimum content of oxidizing components (no more than 0.05 wt. %) and a high content of high-energy metallized additives (more than 50 wt. %), which can improve not only energy characteristics, but also composition density. The subject of the study is the methodology for creating a set of promising paste-like fuel and systems capable of supplying it to the combustion chamber. One of the components of the methodology is the experimental-theoretical calculation method developed in the framework of this work, which allows the design of displacement systems with the design study of its main components, and takes into account the rheological characteristics of the paste-like fuel. A number of hydrocarbon-based paste-like fuel compositions have been developed with various combinations of high-energy metallized additives, as well as surfactants and structurants. Spraying devices and systems were designed and manufactured, allowing to carry out hydraulic and fire bench tests with telemetry of the main parameters. On the developed systems, experimental studies of the compositions of paste-like fuel were carried out, which made it possible to refine the calculation method and confirm the possibility of its application in the design of displacement systems.
DETERMINATION OF THE APPEARANCE OF THE NEWLY DEVELOPED GRSO AND IT`S ELEMENTS BASED ON THE ANALYSIS OF THE RESULTS OF GROUND TESTING OF AN ANALOG PRODUCT
Authors: Борисов В.Н. , Красильников Д.В. , Кузьмин Н.Е.
Published: December 2022

В данной статье представлен анализ различных вариантов газореактивной системы ориентации (ГРСО) на основе особенностей функционирования элементов изделия и их значимости для выполнения поставленных задач, а также на основе результатов изготовления и наземной отработки. Помимо этого предложен облик вновь разрабатываемой ГРСО, удовлетворяющий начальным параметрам и разработана математическая модель генерации газообразного пропана в системе.

This article presents an analysis of various options for a gas-jet attitude control system based on the features of the functioning of the product elements and their significance for achieving the goals and objectives, as well as on the basis of the results of manufacturing and ground testing. In addition, the design of the newly developed gas distribution system is proposed that satisfies the initial parameters and a mathematical model for the generation of gaseous propane in the system has been developed.
STUDY OF THE INFLUENCE OF TECHNICAL CARBON ON THE PROPERTIES OF NITRILE-BUTADIENE ELASTOMERS
Authors: Макаров И.С. , Дьяконов А.А.
Published: December 2022

В работе приведены результаты исследования физико-механических и температурных свойств эластомеров на основе бутадиен-нитрильного каучука в зависимости от активности технического углерода. Полученные в ходе работы результаты отличаются от ожидаемых, так как предполагалось, что с увеличением активности технического углерода будут увеличиваться физико-механические свойства. Однако по результатам исследования видно, что у эластомеров с активным техническим углеродом марки К354 упруго-прочностные свойства оказались ниже, чем у менее активных технических углеродов П803 и N550. Эти несоответствия свойств могут быть связаны с долгим хранением технического углерода и его насыщением влагой. Исследование агрессивостойкости в среде масла АМГ-10 и термического старения показало, что происходит снижение физико-механических свойств эластомеров, кроме образца с техническим углеродом К354. По результатам исследования температуры стеклования наблюдается, что с увеличением активности технического углерода происходит повышение температуры стеклования. Изучение микроструктуры эластомеров показало, что образец, содержащий технический углерод К354 отличается от других образцов и имеет вытянутые макромолекулы каучука. Также приведены результаты исследования элементного состава технического углерода, используемого в работе. Установлено, что содержание кислорода в техническом углероде марки К354 оказалось выше в 6 раз, чем в двух других исследуемых марках, применяемых в работе.

The paper presents the results of a study of the physico-mechanical and temperature properties of elastomers based on butadiene-nitrile rubber depending on the activity of carbon black. The results obtained in the course of the work differ from the expected ones, since it was assumed that with an increase in the activity of carbon black, the physico-mechanical properties would increase. However, according to the results of the study, it can be seen that elastomers with active carbon black of the K354 brand have lower elastic-strength properties than those of less active carbons black P803 and N550. These inconsistencies in properties may be associated with long-term storage of carbon black and its saturation with moisture. The study of aggressiveness in the medium of AMG-10 and thermal aging showed that there is a decrease in the physical and mechanical properties of elastomers, except for the sample with carbon black K354. According to the results of the study of the glass transition temperature, it is seen that with an increase in the activity of carbon black, the glass transition temperature also increases. The study of the microstructure of elastomers showed that the sample containing carbon black K354 differs from other samples and has elongated rubber macromolecules. The results of the study of the elemental composition of carbon black used in the work are also presented. It was found that the oxygen content in the carbon black of the K354 brand was 6 times higher than in the other two brands under study used in the work.
COALESCENCE OF DETONATION NANODIAMOND PARTICLES BY LOW-INTENSITY ULTRASONIC IRRADIATION
Authors: Верещагин А.Л. , Кудряшова О.Б. , Бычин Н.В.
Published: December 2022

Рассмотрен процесс роста частиц детонационных наноалмазов при ультразвуковом облучении интенсивностью 1-2 Вт/см2 в гидрофобной среде, содержащей первичные продукты детонации сплава тротил-гексоген. Предложена математическая модель процесса, включающая неупругие столкновения алмазоуглеродных частиц, приводящие к укрупнению частиц детонационных наноалмазов до 20 мкм.

The process of growth of detonation nanodiamond particles under ultrasonic irradiation with an intensity of 1-2 W/cm2in a hydrophobic medium containing primary detonation products of the TNT-hexogen alloy is considered. A mathematical model of the process including inelastic collisions of diamond-carbon particles leading to enlargement of detonation nanodiamond particles up to 20 microns is proposed.
NUMERICAL MODEL OF MICROCRACK DEVELOPMENT IN A POLYMER BINDER UNDER LOW TEMPERATURES AND HIGH HUMIDITY
Authors: Голых Р.Н. , Хмелёв В.Н. , Пышнограй Г.В. , Ленский М.А. , Шалунов А.В.
Published: December 2022

Эксплуатация механизмов, стационарных конструкций в условиях экстремально низких температур связана с множеством проблем, основными из которых являются следующие: начальные напряжения в материалах из-за тепловых деформаций в результате перепада температур и изменения упругих свойств при низких темперзатурах. Основной фактор, способствующий возникновению начальных напряжений в материалах, особенно в полимерных материалах, заключается в том, что из-за остаточной газации материала при отверждении в пузырьковых включениях накапливается влага. Затем при понижении температуры влага при превращении в лёд расширяется и происходит дальнейшее раскрытие пор и развитие трещин. Реализована численная модель развития микротрещины в полимерном связующем при расширении влаги за счёт фазового перехода из жидкости в лёд.

The operation of mechanisms, stationary structures in conditions of extremely low temperatures is associated with many problems, the main of which are the following: initial stresses in materials due to thermal deformations as a result of temperature differences and changes in elastic properties at low temperatures. The main factor contributing to the occurrence of initial stresses in materials, especially in polymeric materials, is that due to the residual gassing of the material during curing, moisture accumulates in bubble inclusions. Then, when the temperature drops, the moisture expands when it turns into ice, and further opening of the pores and the development of cracks occur. A numerical model for the development of microcracks in a polymeric binder during expansion of moisture due to a phase transition from liquid to ice is implemented.