bluuebunny/crossref_metadata_2025 huggingface dataset:
Imipenem-Cilastatin-Induced Seizures: A Case Report
Authors: Aloui Ghaith , Houria Baraa Ben , Yousfi Mohamed Ali
Published: October 2024

Background:

Imipenem-cilastatin, a carbapenem antibiotic, is commonly used for severe
bacterial infections. While generally well-tolerated, it can rarely cause central nervous system
toxicity, including seizures. We have, herein, reported a case of imipenem-cilastatin-induced
seizure in a 20-year-old patient.

Case Presentation:

A 20-year-old male was admitted to the intensive care unit for febrile status
epilepticus and acute respiratory distress syndrome. Initial evaluations ruled out underlying causes
and anti-epileptic treatment has been initiated. Despite having an effective anti-epileptic treatment
for three months of hospitalization, seizure recurrence occurred, leading to antibiotic regimen adjustment
as the imputability of imipenem-cilastatin was suspected. After discontinuation of the involved
drug, the patient remained neurologically stable. Previous literature has reported cases of
imipenem-cilastatin-induced seizures, particularly in elderly patients or at higher dosages. The
causality assessment was conducted using the updated French method, which rated the chronological
criterion as C2 and the semiological criterion as S2. The intrinsic imputability score was I3, indicating
plausible causality, and the extrinsic bibliographic score was B3.

Conclusion:

Our case has highlighted the importance of promptly recognizing imipenem-cilastatin-
induced epileptic seizures in order to treat them more effectively and thus optimize the patient’s
care. Therefore, we emphasize that clinicians be vigilant about the side effects of its use, particularly
in patients with neurological susceptibilities. We also advocate a personalized choice of
antibiotics, taking into account both antimicrobial efficacy and potential adverse effects, for better
outcomes with fewer risks.
Factors Associated with Stress among Healthcare Personnel after COVID-19 in Northeast Thailand: A Cross-Sectional Study
Authors: Chupanich Pornpimon , Aotprapai Pratoomrat , Seesophon Sakda , Laoraksawong Pokkamol
Published: October 2024

Background

The coronavirus disease (COVID-19) has affected people psychologically worldwide, particularly healthcare personnel. Even though the COVID-19 pandemic situation has eased, healthcare personnel must still perform their duties, which has resulted in psychological impacts, particularly stress.

Objectives

This study aimed to examine the risk factors associated with stress among healthcare personnel post-COVID-19 pandemic in northeast Thailand.

Methods

A cross-sectional analytic design was conducted from January to April 2023. One thousand and three hundred healthcare workers were selected from primary, secondary, and tertiary hospitals across 16 districts within Chaiyaphum province. The questionnaires were used to collect data, and the stress test 5 (ST-5) questionnaire was used to investigate stress among healthcare personnel.

Results

The overall stress rate for healthcare workers was 15.47%, including very severe (8.85%) and severe (6.62%). The factors associated with stress consisted of work position, environment of work, personal life such as education level and income, and responsibility for taking care of family members, in addition to experiencing quarantine from COVID-19 were more likely to have a high risk of stress problems among healthcare workers.

Conclusion

This result highlighted that the mental health of personnel should be in critical situations, and those found severely afflicted should undergo professional care. To prevent psychological issues, particularly stress, health organizations should be concerned with strong organizational management, which includes supporting bonuses and providing high-quality personal protective equipment (PPE) to healthcare staff.
The Efficacy of Leukocyte-Platelet-Rich Fibrin in Combination with Sub-Epithelial Connective Tissue Graft in Peri-Implant Soft Tissue Augmentation: A Randomized Controlled Clinical Trial
Authors: Azhibekov Aibek , Menchisheva Yuliya , Espolayeva Aikerim , Uglanov Zharkynbek , Tsokov Krasimir Tsvetanov , Mirzakulova Ulmeken
Published: October 2024

Aims and Background

The aim of the current study is to assess and compare the efficacy of the leukocyte-platelet-rich fibrin [L-PRF] in combination with sub-epithelial connective tissue graft [SCTG] and SCTG only in promoting aesthetic results and strengthening the state of the soft tissue surrounding implants.

Materials and Methods

A parallel-arm randomized controlled clinical trial was used for this investigation. A total of 120 patients who had missing teeth with a thin gingival biotype [less than 1.5 mm] were included in this study. The patients of Group I were treated with PRF and SCTG during second-stage implant surgery, while the patients of Group II were treated with SCTG only. Treatment outcomes included the assessment of the width and thickness of the keratinized tissue at the baseline, 3 and 6 months postoperatively; pro- and anti-inflammatory cytokines [IL-1β, TNF-α, and IL-4] in the peri-implant crevicular fluid on the 1st, 7th and 30th days after surgical procedure; swabs from the surface of postoperative wounds of the mucous membrane on days 3, 5, 7, and 10; Pink aesthetic score [PES] 6 months after prosthesis placement; and laser Doppler flowmetry on days 1, 7, and 14 after augmentation.

Results and Discussion

Patients who received L-PRF+SCTG had a significant increase in keratinized tissue thickness [KTT] [p = 0.08] than those who received SCTG only [KTT 1.86 ± 0.17 Vs 1.48 ± 0.15] 6 months after surgery. The mean [±SD] of PES was found to be 13.1 [±0.02] for Group I and 11.3 [±0.08] for Group II. The cytology, LDF, and local immunoassay analysis demonstrated faster epithelialization and better revascularization in Group I.

Conclusion

The use of L-PRF and SCTG is an effective method in augmenting peri-implant soft tissue and improving gingival biotype and aesthetic outcomes, which would help overcome complications and increase patients’ satisfaction.
Analysis of Demographics Characteristics on Depression in Perimenopausal Staff at a Central General Hospital in Medan, Indonesia
Authors: Gultom David Adrian , Amin Mustafa M. , Husada Muhammad Surya , Effendy Elmeida
Published: October 2024

Introduction/Objective

Perimenopause is a period where the ovary gradually starts to produce less estrogen. One of the impacts that could happen during perimenopause is the onset of depression arising from hormonal and metabolic disorders due to the significant decrease of ovarium function and secretion of endogenous estrogen. This study was conducted to assess the factors related to depression in perimenopausal women.

Methods

A multivariate linear regression analysis with a cross-sectional design was conducted at a Central General Hospital in Medan, Indonesia, from October 2023 to January 2024. Subjects were perimenopausal female staff at the hospital who met the inclusion and exclusion criteria. Symptoms of depression were assessed using the Beck Depression Inventory-II (BDI-II) score. Data analysis was conducted using bivariate and multivariate tests with linear regression.

Results

A total of 111 subjects were included in this study. The median age was 48 years, and the median Body Mass Index (BMI) was 25. The mean depression score based on BDI-II was 12.96±7.084. Bivariate analysis showed significance on age, years of education, total monthly income, BMI, and number of pregnancies. Multivariate analysis showed that total monthly income had the highest correlation amongst other variables, followed by age, while the number of pregnancies had the lowest correlation.

Conclusion

In conclusion, there was a significance between depression and age, income, and number of pregnancies in perimenopausal staff. On the other hand, there was no significance between depression and years of education, BMI, marital status, and chronic disease.
Enhancing Collaboration and Interdisciplinary Strategies for Navigating Innovative Technologies and Regulatory Approvals in the Cosmetic Industry
Authors: Shastri Divyesh H. , Gandhi Shivani , Almeida Hugo
Published: October 2024

:

The cosmetic industry, driven by innovation, constantly seeks safer, more effective,
and sustainable products. However, regulatory hurdles often impede the introduction of innovative
cosmetics. This paper explores the convergence of advanced technologies and regulatory
conformity, emphasizing the need for collaborative, interdisciplinary approaches.

:

Through an extensive review of literature and case studies, we reveal the multifaceted challenges
within the industry. These encompass shifting consumer expectations, ingredient safety concerns,
and intricate global regulations. Cross-functional collaborations, uniting researchers, regulators,
industry experts, and consumers, are pivotal, driving innovation while ensuring product safety
and compliance.

:

Our research stresses the importance of a proactive, all-encompassing approach to product development.
This approach should integrate cutting-edge technologies, rigorous safety assessments,
and smart regulatory strategies from project inception. Additionally, it emphasizes engaging
stakeholders, sharing knowledge, and practicing transparency to earn trust from consumers and
regulators.

:

This paper provides a comprehensive overview of the balance between innovation and regulation
in the cosmetic industry, advocating for a paradigm shift characterized by collaboration and interdisciplinary
efforts. By aligning innovation with regulatory compliance, the industry can effectively
navigate the complex landscape of modern cosmetics, fostering the creation of safer,
more sustainable, and consumer-centric products.
Uvulitis as a New Sign of COVID-19
Authors: SeyedAlinaghi SeyedAhmad , Attarian Niloofar , Tabari Amir , Mehraeen Esmaeil , Jahanfar Shayesteh
Published: October 2024

COVID-19, the virus accountable for the latest global pandemic, has caused millions of
mortalities and morbidities since its initial spread in 2019, originating in Wuhan, China. The virus
is thought to have originated from an animal coronavirus before acquiring the capability of humanto-
human transmission and causes acute respiratory syndrome. The virus also presents as a multisystemic
disorder with diverse manifestations across various bodily systems. Over time, we have
observed both short-term and long-term complications arising from it.
Investigating the Relationship between the Health Literacy of COVID-19 Patients and the Burden of Family Caregivers
Authors: Raesi Rasoul , Sadeghmoghadam Leila , Mohammadpour Ali , Najafi Samane , Movahedi Yones
Published: October 2024

Background:

The COVID-19 pandemic was associated with the challenge of health literacy
of patients and the care burden of family caregivers.

Aim:

The present study was conducted to determine the relationship between the health literacy of
patients discharged with the diagnosis of COVID-19 and the care burden of family caregivers.

Methods:

This descriptive and analytical study was conducted on 290 people who were COVID-19
patients and 290 people who were their family caregivers in 2022. The study used the convenience
sampling method in hospitals located in 22 Bahman Khaf and Allameh Bohlol Gonabadi. The data
were collected using the health literacy questionnaire of Montazeri et al. (2005) and the burden of
care questionnaire of Zarit et al. (1998). The data were analyzed using SPSS-22 statistical software
and Kolmogorov-Smirnov, independent t, Pearson correlation coefficient, and ANOVA tests at a
significance level of 0.05.

Results:

The level of health literacy in most patients was weak. The burden of care for most family
caregivers was severe. There was a negative and significant relationship between the health literacy
of patients in general and the care burden of family caregivers in general (p<0.001). For an increase
of one health literacy score in general, the care burden score decreases by 0.44.

Conclusion:

As the health literacy of patients increases, the care burden of their family caregivers
decreases. Therefore, scientific and practical training plans for patients are recommended to health
policymakers to improve health literacy and ultimately reduce the care burden of family caregivers.
A Presença de Emílio Biel no Santuário do Bom Jesus do Monte
Authors: Vasconcellos Ana
Published: October 2024

The present article deals with historical facts that took place between 1879 and 1880, revealing the circumstances of the presence of Emílio Biel at the Sanctuary of Bom Jesus do Monte, in Braga, as a photographer. This was possible through access to the minutes drawn up in that period and kept in the Inventory of the Confraternity of Bom Jesus do Monte. Through the reading of these minutes, the term of the contract signed between the Bureau of the Brotherhood and the house Emílio Biel & Cª was found, exposing the strict context of the clauses stipulated to the photographer. Other documents related to the contract were found, such as payment orders, bills of exchange, prints and photographic views. These documentary and photographic records are the testimonies of that historical event, that is, they are primary sources of the heritage inventory. The photographic records considered as iconography of the History of Art, reveal the various existing peculiarities and the cultural content of that historical moment.
Digital Health Readiness: Making Digital Health Care More Inclusive
Authors: Bober Timothy , Rollman Bruce L , Handler Steven , Watson Andrew , Nelson Lyndsay A , Faieta Julie , Rosland Ann-Marie
Published: October 2024

This paper proposes an approach to assess digital health readiness in clinical settings to understand how prepared, experienced, and equipped individual people are to participate in digital health activities. Existing digital health literacy and telehealth prediction tools exist but do not assess technological aptitude for particular tasks or incorporate available electronic health record data to improve efficiency and efficacy. As such, we propose a multidomain digital health readiness assessment that incorporates a person’s stated goals and motivations for use of digital health, a focused digital health literacy assessment, passively collected data from the electronic health record, and a focused aptitude assessment for critical skills needed to achieve a person’s goals. This combination of elements should allow for easy integration into clinical workflows and make the assessment as actionable as possible for health care providers and in-clinic digital health navigators. Digital health readiness profiles could be used to match individuals with support interventions to promote the use of digital tools like telehealth, mobile apps, and remote monitoring, especially for those who are motivated but do not have adequate experience. Moreover, while effective and holistic digital health readiness assessments could contribute to increased use and greater equity in digital health engagement, they must also be designed with inclusivity in mind to avoid worsening known disparities in digital health care.
Exploration into the Impact of Digital Transformation on the Human Resource Management Process in the Public Sector
Authors: Liu Xinyan
Published: October 2024

With the rapid advancement of science and technology, digital transformation has emerged as a significant force driving change across all industries globally. In the public sector, human resource management—one of its core functions—is undergoing unprecedented changes due to this digital wave. This paper aims to thoroughly explore the comprehensive impact of digital transformation on the human resource management processes within the public sector, to identify the challenges posed by this transformation through careful analysis, and to offer valuable insights and references for the future direction of human resource management in this domain.
Financial Management Challenges Heads of Schools Experience in Public Secondary Schools in Mbeya Rural District, Mbeya Region, Tanzania
Authors: Chundu Thadeo , Mwahombela Lucas , Gwambene Brown
Published: October 2024

Tanzania has decentralized financial management decision-making to school leaders and their communities. Management of financial resources is essential for the expansion of the skillful and resourceful use of finances in educational institutions. Financial management is the fundamental element on which the success of any organization depends. Where management is weak, success is hard to ascertain. This study explored the financial management challenges heads of schools experience in public secondary schools in Mbeya rural district. The data were collected from 66 respondents using questionnaire and interview guide. The study used simple random sampling and purposive sampling techniques. The quantitative data were analyzed using Statistical Package for Social Science (SPSS ver. 20) and qualitative data were analyzed through content analysis. The study results revealed that, heads of public secondary school face common challenges particularly on budgetary, school accounts, financial reviews, financial accountability and financial recordings which in one way or another reduce work ability and responsibility. The study recommends that, heads of schools should be given full mandate on utilization of capitation grants and other funds, management workshops should be conducted to both heads of schools and teachers, and also there should be a need of organizing regular parental meetings to curb managerial financial challenges facing heads of schools on provision of quality education in public secondary schools. The government should lay down a policy on managerial skills training for the newly appointed and continuing heads of schools as this will enhance effective school management, hence better attainment of school goals and objectives.
Modificación de los parámetros modales debidos a los efectos de interacción dinámica suelo estructura
Authors: Fernández Sola Luciano Roberto , Castillo Córdova Sixto Emir
Published: October 2024

El procedimiento incluido tanto en las Normas Técnicas Complementarias para Diseño por Sismo de la Ciudad de México como en el Manual de Obras Civiles de la CFE para considerar los efectos de Interacción Dinámica Suelo Estructura (IDSE) se basa en el uso de un factor de modificación de la respuesta estructural definido como el cociente del cortante basal asociado al primer modo con base rígida y con base flexible. En este procedimiento se considera que tanto las formas modales como los factores de participación modal son los mismos para ambas condiciones de apoyo. Sin embargo, se ha observado que las formas modales y los factores de participación modal son diferentes para ambas condiciones de apoyo, sobre todo los asociados al primer modo en traslación. Adicionalmente, el cálculo del periodo del sistema con base flexible en estos cuerpos normativos, depende del peso efectivo del primer modo, que se modifica ante la condición de base flexible. En este trabajo se presentan los resultados de un análisis paramétrico de las variaciones de las formas modales y los factores de participación modal para distintos niveles de flexibilidad de la base. Se utiliza un modelo plano de viga de cortante para representar a la estructura y el concepto de rigidez dinámica del sistema suelo-cimentación para representar la flexibilidad de la base. Se analiza la influencia tanto del número de grados de libertad en la estructura como de su relación de esbeltez. Los resultados se presentan con referencia a los de base rígida. Se observa que a medida que los efectos de IDSE son mayores, el factor de participación modal del primer modo en traslación se incrementa y la forma modal se modifica. Se plantea una expresión para determinar el factor de participación modal del primer modo con base flexible que se compara con los resultados de modelos numéricos.
Detalles estructurales de huracanes revelados por fotografías de satélites
Authors: Fett Robert W.
Published: October 2024

Las fotografías de ciclones tropicales por satélites indican pronunciada subsidencia periférica. En muchos casos se forma una clara zona anular o canal de anchura variable como resultado del movimiento de subsidencia en o cerca del borde del escudo de altas nubes de la tormenta. Las bandas convectivas exteriores o líneas de turbonadas pre-huracán son a veces visibles a lo largo del borde exterior de las zonas anulares. Los análisis del viento superior y de secciones de tiempo indican que zonas deformantes causadas o reforzadas por efectos del flujo de salida se asocian íntimamente con áreas de subsidencia. Las zonas de cizallamiento parecen originarse al convergir el aire relativamente cálido del anticiclón sobre la tormenta con el aire circundante relativamente fresco. En este estudio se encontraron estaciones aisladas que sufrían advección de aire· frio por arriba antes de pasar la línea de cizallamiento al nivel de 200 mb, seguida de advección de aire caliente en el flujo de salida de la tormenta. Así se origina una concentración del gradiente térmico horizontal junto a la zona de cizallamiento que aparentemente ayuda a producir un máximo de viento anticiclónico en la misma área. El gradiente térmico pudo haberse reforzado más por el calentamiento de partes de aire que se hundían en la zona anular.
Opiniones de estudiantes de un posgrado en educación sobre la movilidad virtual
Authors: Chan Chi Gladis Ivette , Rodríguez Pech Juanita , Estrella Ceme Helbert Alfonso
Published: October 2024

La movilidad estudiantil reporta múltiples ventajas para el alumnado participante. Derivado de la pandemia de COVID-19, recientemente dichas estancias tuvieron que realizarse virtualmente. Considerando la particularidad de estas experiencias, el objetivo del estudio fue describir las opiniones del alumnado de un posgrado en educación sobre su participación en la movilidad virtual. Se siguió una metodología cuantitativa, usando la técnica de encuesta y un instrumento de preguntas abiertas. Las opiniones recabadas correspondieron a cuatro rubros: a) logros, b) dificultades y retos, c) trabajo con el co-tutor y d) experiencia general. Se encontró que la movilidad virtual cumplió con las expectativas de la mayoría del alumnado quienes obtuvieron logros académicos, profesionales y personales. La comunicación fue el reto más reportado y la figura del tutor resultó relevante para el éxito de la estancia. Se discuten beneficios y dificultades asociados con la movilidad virtual, y se concluye su relevancia en la formación docente.
Adolescentes en la era digital. Desvelando las relaciones entre las redes sociales, el autocontrol, la autoestima y las habilidades sociales
Authors: Rubio Hernández Francisco José , González Calahorra Elena , Olivo Franco José Luis
Published: October 2024

El uso desmedido de las tecnologías por parte de los menores de edad puede acarrear consecuencias negativas. Este estudio, con una muestra de 158 adolescentes de educación secundaria obligatoria, analizó la influencia de las redes sociales en sus habilidades interpersonales, autoestima y autocontrol. A través de una investigación cuantitativa descriptivo-correlacional, se aplicó un cuestionario de 55 ítems. Se utilizó el coeficiente de correlación de Spearman, las pruebas U de Mann-Whitney y H de Kruskal-Wallis, y análisis de contenido para las preguntas de respuesta abierta. Casi el 40% de los adolescentes no se sentía cómodo hablando en público. 6 de cada 10 se percibían inútiles en ocasiones y dedicarían más tiempo al estudio si no estuvieran conectados a internet. El 70% reconoció problemas de concentración. Las redes sociales fueron más usadas por mujeres, principalmente TikTok, Instagram y WhatsApp, y prioritariamente con finalidades comunicativas, de entretenimiento y diversión. Se encontró una relación significativa entre el uso de redes sociales y el autocontrol. Si bien no se detectaron niveles graves de dependencia, sí se identificaron problemas de autocontrol en los jóvenes. Se recomienda implementar programas para prevenir la adicción al mundo virtual y fomentar un uso responsable de las tecnologías.
System Study Review of Electrical Machines under Specific Operating Conditions of Power Installations
Authors: Shaitor N. M.
Published: October 2024

The problem of life cycle vulnerability, predetermined by the development stages, operation and modernization of electrical machines due tosize and weight restrictions, dynamic electromagnetic and thermal overloads, possible flooding and changes in ventilation and cooling conditionsis considered. Reducing the weight and size of electric machines implies eliminating passive sections of magnetic circuits and optimizing the ratio of copper and steel. The desire to reduce weight and size indicators and increase energy density entails increased heat generation and temperature loads of structural elements. The increase in operatingtemperatures of modern machines indicates the need to develop mathematical models that account the response of electrical materials and structural elements to the combined thermal and magnetic fieldeffects. Such models are in demand to study the temperature dependence of insulating, magnetic and operating properties of electrical machines when establishing the requiredoperating moderestrictions in order to preserve and extend the life cycle. The criterion for making management decisions aimed at changing operating modes during operation can be maximum loads that limit exceeding the maximum permissible temperatures of the electrical insulationclass used, as well as critical values of induction determined by the temperature dependence of ferromagnetproperties that affect the performance characteristics of electrical machines. Further solution to the problem lies in the creation of digital twins containing complete mathematical and computer simulation models that describe processes in electrical machines, taking into account the temperature dependence of materialphysical properties of structural elements being subjected to thermal, magnetic and electric fields.
The Effect of Pollutantmigration on the Environmental Situation in the Zone of Chemical Weaponinfluence
Authors: Galiakberov R. A. , Yannikov I. M. , Alekseev V. A. , Ershova M.V.
Published: October 2024

The article is devoted to the issues of monitoring the environment state in the influence zone of chemically hazardous objects on the example of the environmental monitoring system of a chemical weapons storage and destruction facility (CWDF) in the city of Kambarka, Udmurt Republic. Among the components there are: production control systems and site monitoring, environmental monitoring and health monitoring, however, it is environment in the zone of the chemical waste disposal facility influence which hasthe largest area and is the most difficult to control. Here, due to large areas, the process of migration of pollutants over considerable distances is observedclearly. The importance of the system for arranging sampling points on the topographic map of the waste disposal facility is shown in order to take into account the process of pollutantmigration. Vertical and horizontal migration of pollutants can lead to the emergence of unobvious local areas of pollutantaccumulation both within and outside the influence zone of the chemical waste disposal facility. A solution to the problem of migration process modeling on a conditionally selected area of the territory within the facility influence zone is presented to show the effect pollutantmigration on the dynamics of the environmental situation within the chemical waste disposal area. It has been proven that within the area under consideration there will be a significant amount of pollutant, which, subject to further evaporation of rainwater runoff, will remain in this area. This indicates the inevitability of the appearance of local areas of pollutantaccumulation in the influence zone of chemically-disposable substances in excess of permissible standards for their concentration, which requires a revision of the arranging sampling pointsystem, taking into account the application of migration processmodeling methods. The need for dynamic observations in individual sites of the area, selected with respect to the analysis results of the pollutantmigration routes within the entire influence zone of the chemically-disposable waste disposal facility, in order to assess the degree of impact of the non-toxic waste disposal facility on the environment, is substantiated.
Automated Diagnosing of Melanoma Based on the Stolz Algorithm
Authors: Korobkova T. A.
Published: October 2024

The article discusses an algorithm for automating melanoma diagnosing using computer vision and a neural classifier. The aim of the study is to develop an algorithm for efficient classification of melanoma in images, as well as the influence of dermoscopic features on diagnosing. New growths in the image are highlighted. Calculation of parameters for the Stolz formula and calculation of TDS (calculation of diagnosis) were carried out. Based on the calculations performed, the optimization problem was solved to clarify the boundaries of the neoplasm differentiation areas, and the Stolz formula coefficients adjustment, and a set for neural network training was generated; MLP was selected as a classifier. The average accuracy of the algorithm on two independent data sets is 86%. Classification by a neural network of two sets of images according to Stolz parameters is given. Based on the results, a diagnosing was made. Based on the Stolz algorithm, a set of images with skin neoplasms is pre-processed: the neoplasm is isolated, ABCD signs and the overall dermoscopic score are calculated from the image. The proposed algorithm for automated melanoma diagnosing based on the Stolz dermoscopic method showed good results on real sets of images. The reduced accuracy of the model on the HAM10000 set is due to the class imbalance (ratio of classes 1 to 9). A high F-measure value indicated a good balance between sensitivity and specificity of the model, with the model tending to be better at detecting melanoma true positive (TP) cases. High sensitivity is desirable for problems, where reducing false negatives (missing positive cases) is critical, even at the expense of increasing Type I errors. The completeness of the model was 88.54% and 95% and suggests that the model minimizes cases of missing diseases. It is concluded that the more accurately the ABCD parameters are calculated, the more accurately the model will be able to classify the disease; in the future, refining and dividing parameter D into several components can provide the model with additional features for classification.
Numerical Simulation of “Submachinegun - Grenade Launcher” Dynamic System
Authors: Shvedchikov S. V. , Shchenyatsky A. V. , Romanov A. V.
Published: October 2024

In modern small arms, one of the most important technical characteristics is the survivability of barrel, which greatly affects the competitiveness of the product on the market. The task of increasing the survivability of the barrel of automatic small arms has not yet lost its relevance. Based on the modern nature of combat and the multitasking of combat operations, complexes of manual automatic weapons with the use of various external devices, such as sighting devices of various designs, under-barrel grenade launchers, low-noise shooting devices, etc., are currently being developed on the basis of a single reference sample. When designing new samples, several approximated mathematical models are currently used, that do not take into account the impact of external devices on the dynamic and oscillatory processes occurring during firing from modern hand-held automatic weapons. This article describes a physical and mathematical model of the dynamic interaction of an under-barrel grenade launcher and small arms (submachine gun), demonstrates a computational mathematical model for different types and methods of securing a device such as an under-barrel grenade launcher. The optimal computational model is revealed, allowing to describe the dynamic process of interaction of the system elements in the numerical simulation of the shot. Advantages and disadvantages have been identified, on the basis of which the goals and objectives of further work have been determined, consisting in studying the influence of external devices on the parameters of the barrel of automatic small arms, in order to improve the operational, tactical and technical characteristics of automatic small arms systems based on the development of a numerical and analytical approach, and a modular mathematical model of automatic small arms weapons.
Pulsed Signal Duration Shaper with Adaptive Response Thresholds
Authors: Kulikov V. A. , Syakterev V. N.
Published: October 2024

His paper represents a shaper designed to restore the width of rectangular pulses transmitted over an open-optic (wireless) communication channel and having shape distortions in the form of amplitude modulation, pedestal and tightening of the front and decay. The principle of pulse width recovery is based on the formation of voltage comparator thresholds adaptive to changes in high and low pulse signal levels. Due to the use of sample-and-hold circuit (UVH - S/H circuit) in the circuit, the values of the input signal levels are stored in the previous half-periods. The threshold voltage of the comparator before its operation is formed as the output voltage of a resistive voltage divider into two inputs, one of which is supplied with the current voltage of the input signal, and the other with the voltage level of the signal recorded in the S/H circuit at the previous half-cycle of information pulses. The study presents the method for estimated error in pulse width formation from comparator bias voltages, S/H circuit and modulation changes in the shape of the information signal. The example provides quantitative estimates of the error. In the Micro Cap circuit modeling environment, a model experiment was performed, diagrams of the signal source and shaper models on ideal components and time diagrams of the device operation are presented. The operability of the device during the passage of a pulse signal with the above-mentioned shape distortions has been confirmed. A large depth of modulation of the input signal amplitude is allowed. The formative properties of the circuit are provided. The speed of the shaper is determined by the speed of the comparator and the S/H circuit. To reduce the error of the duration forming of information pulse signals, it is necessary to choose a voltage comparator and sample-and-hold circuit devices with minimal static errors.
Hybrid bionic control system for prostheses: a review
Authors: Samandari A. M. , Afonin A. N.
Published: October 2024

The legs and hands are the most susceptible to loss and this is due to the fact that they are prominent external organs in the human body. With increasing disasters, accidents, wars and diseases the loss of limbs is increasing, making the individual restricted in freedom and movement and pursuing to find alternatives to improve the individual's life is extremely important. Modern bionic prostheses are the best alternatives to replace amputated ones to perform both aesthetic and functional tasks. On this basis and by analyzing the most common and used methods in prosthetics management as the electroencephalography (EEG), electromyography (EMG), and functional near- infrared spectroscopy (fNIRS) methods, knowing their advantages and disadvantages, comparing them and documenting their results from the outputs of literature and previous experimental studies, whether in individual use or hybrid use.In the light of these data, this article highlights the most common technologies and considers their superiority and insuperiority, which can be suitable for the formation of a hybrid bionic control system for prostheses or rehabilitation and restoration of lost functions. Based on the most important studies that have dealt with these technologies whereas individually or in their hybrid state. In addition, this article provides an encouraging outlook for those interested in scientific research to research, compare, identify and characterise superior hybrid systems related to exoskeletal control systems and in particular prostheses.
Classification of The Analog Informative Parameters of the Rod Deepwell Pump Dynamograph Signals
Authors: Ilyin A. P. , Milovzorov G. V. , Milovzorov A. G.
Published: October 2024

In mechanized oil production, rod deep-well pumps are widely used. They consist of surface and underground parts. The above-ground part includes pump drive and wellhead fittings. The wellhead fitting is designed to seal the well. The underground part is the pump itself. The pump consists of a plunger, rod string and tubing. The main method of diagnosing a rod deep-well pump is dynamometry. Dynamometry allows to determine the equipment defects and control the efficiency of the pump operation mode without stopping the well operation. Dynamometry is a process of measuring the loads, which are perceived by the polished rod during the operation of the well. There are theoretical and practical dynamograms. Practical dynamogram is a closed non-periodic curve with variable amplitude. There are various methods to automate the process of the dynamometry result processing. In this paper we analyze the analog informative parameters of dynamometer signals. These parameters depend on the friction forces in the underground part of the rod pump, inertial forces, tightness of valve assemblies, dynamic liquid level, etc. The results obtained can be used in the development of the pumping process. The obtained results can be also applied to develop processing algorithms of practical dynamograms.
Capabilities of Software Package Gearacl for Design Gearings and Transmission Elements
Authors: Dorofeev D.V.
Published: October 2024

Creation of a mathematical model of gearing operation belongs to one of the most knowledge-intensive fields of knowledge. Interdisciplinary research is being conducted to develop the model. For practical use, the results of this work are embodied in strength analysis standards. Due to the complexity of the processes occurring in gearings, performing analysis of one pair of gears today requires not only significant time costs from the engineer, but also a deep understanding of hundreds of pages of calculation techniques described by groups of interrelated standards. The calculation formulae include clarifying coefficients, the contribution and values of which are determined by a group of specialists developing the standard, based on research of analysis result coordination, experimental data and calculations performed using the finite element method. To perform the analysis, the designer needs knowledge about the principles of choosing coefficient values and their meaning. Performing the analysis of gearings according to the standard is a time-consuming process that can be correctly performed only by an engineer with experience in designing gearings. To facilitate the work of the engineer, software products both domestic and foreign were created. However, the trends of recent years require replacement of foreign software products. In 2022, the specialists of the Central Institute of Aviation Motors developed the Gearacl software package, which allows replacing foreign products in the volume required by the aviation industry enterprises in the field of cylindrical gearings, shafts and bearings analysis. Modern analysis methods have been introduced into the software package. This article is devoted to the capabilities of the Gearacl software package.
Shooting Simulator «Inhibitor»: Mathematical Support of Shot Special Effects
Authors: Egorov S. F. , Shelkovnikov Yu. K. , Shelkovnikov E. Yu. , Syakterev V. N. , Petukhov K. Yu. , Milovzorov G. V. , Afanasyev V. A.
Published: October 2024

The algorithms for preparing shooters to perform an exercise, conducting its course with real-time informing, as well as the implementation of mathematical support of shot special effects (sounds, tracers, explosions, hits, and misses) for the optical-electronic shooting simulator 'Inhibitor' developed at Institute of Mechanics UdmFRC UB RAS and at facilities of Computer Department of Kalashnikov ISTU jointly with JSC «Kalashnikov» Concern» are described. A tactical and technical task is given for the visual and sound effects of a shot, such as tracers, grenade ruptures, misses, return fire, and controlled flight of PTURS. In addition, the manager must monitor the weapon simulator sensors during the preparation of the exercise (magazine, fire switch, cartridge inside the barrel and sight readings) and conduct the course of the exercise with real-time viewing of both targets and shots and altering the ammunition number and type (all ammunition can be made tracer ones). The arrows are selected from the department database for convenience. Viewing shooting errors and aiming along with hit points allows correction of trainees’ actions by means of commands and quick display service information for trainee independent classes on the projection screen. The study the factors affecting ballistic dispersion was carried out and the recommendations for its modeling were formulated. The literature review confirms the potential of further research and development of electronic rifle simulators via improvement of computational tools and the development of software libraries in order to increase the accuracy of shot process simulation and flexible display adjustment of current training exercise results. It is necessary to expand realistic opportunities of shot special effects and reduce the cost constantly, which means to increase the competitiveness of electronic shooting simulators.
Intelligent System for Artillery Mount Autonomous Guidance And Firing Adjustment
Authors: Korolev S. A. , Nefedov D. G. , Rusyak I. G.
Published: October 2024

The article presents mathematical models, numerical algorithms and a software package for an intelligent system for artillery mount autonomous guidance and adjustment of firing. The software package includes the following components: a module for solving the direct problem of external ballistics, a neural network training module, and a firing guidance and adjustment module. The first module is designed to form a database of computational experiments by repeatedly solving the direct problem of external ballistics under varying firing conditions. In the second module, a neural network is trained to solve the inverse problem of external ballistics using the database generated from computational experiments. The third module implements algorithms for calculating the artillery mount launching angles on a target using a trained neural network and calculating corrections to launching angles based on data on the projectile impact point deviation from the target. Having received data on the artillery mount readiness to fire, the coordinates of the target position and projectile’s impact point received from a digital observer, the software package calculates the necessary launching angles or corrections to them. Launching angles are transferred via text files to the control system of the artillery mount drives, then a shot is fired and the conditions for hitting the target are assessed. The algorithm is then repeated for the next shot or new target. Testing of the developed algorithms for autonomous guidance and shooting correction was carried out using modeling of external ballistics processes in the software package, as well as carrying out experimental testing on a working simulation device of an artillery mount. The developed software package allows visualization of the obtained results and saving the history of the performed operations.
Simulation Model of One-Parameter Selective Assembly of Two Elements With Multivariate Set-Making
Authors: Filipovich O.V.
Published: October 2024

Analytical and simulation methods are used to model assembly processes and technological systems in order to determine and optimize their performance and functioning parameters. The first one, describes an object or process using mathematical relationships indirectly. Simulation modelling is one of the modern methods of production system experimental research, allowing to take the presence of various components in the system, nonlinear characteristics, non-determinism and dynamism of ongoing processes into account. This work is devoted to the simulation model development of the technological process of multivariate one-parameter selective assembly of two elements. Multivariate set-making is defined by generalized rules with a set of weights which elements are set the distribution of elements between sets of different types. Selectively assembled elements have parameters determined by the manufacturing stage, which are independent random variables with known probabilistic characteristics. It is assumed that the input-output relationship is linear with given coefficients, the set-making equations linking the numbers of selective groups and assembly sets are known. A simulation model of the assembly process was built in the GPSS World, which, in contrast to the known one, operates with multivariate set-making rules for the case of assembly of two elements. The model allows to determine the quantitative indicators of the assembly process, in particular, the probabilities of assembly set formation, work-in-progress and preliminary rejects. As an example, the process of multivariate set-making of two parts forming a precision engineering product is considered. The data of parts distributions of both types by selective groups before assembly are given, the technological process indicators are calculated. Based on the modelling results the advantages and disadvantages of the multivariate set-making process are outlined.
The Model of the Armament And Military Equipment Repair System
Authors: Tsapok A. V.
Published: October 2024

The purpose of the study, the results of which are presented in the article, is to develop a mathematical model of the process of restoring weapons and military equipment (IWT), taking into account their losses due to combat and operational and technical reasons, as well as the production capabilities of repair and restoration bodies (RVOS) of the first and second levels. For the operational solution of the recovery system planning and managing tasks, it is necessary to have models that allow approximate assessment of the system effectiveness at various levels of management. The hypothesis of the study is to increase the efficiency of restoring weapons and military equipment using the forces and means of military repair bodies, field repair brigades (VRB) in the conditions of the operation, as well as the production capacities of enterprises of the local industrial economic base. As criteria for effectiveness evaluation, the indicators characterizing the combat capabilities of military formations for a certain period of military planning in peacetime and wartime are considered. Research methods are mathematical apparatus of the theory of queuing systems and differential equations of 'dynamics of averages', system analysis, comparative analysis, generalization, forecasting, and document analysis. The resulting model establishes a relationship between the input parameters and the output indicators of the recovery system, characterizing the serviceability of the IWT. In this case, the control parameter is a parameter that characterizes the ratio of the number of samples of military equipment repaired in the 1st-level RVR. Results: the developed model can be used for: analyzing the technical support system of troops; solving optimization problems of managing the technical support of troops: finding the optimal ratio of the number of samples of military equipment repaired by the first and second level RVOS; determining the optimal number of field crews for repairing military equipment while ensuring a given level of serviceability of military equipment and minimizing the cost of repairing military equipment.