bluuebunny/crossref_metadata_2025 huggingface dataset:
Medium-term Results of Body Balance Trainings in Primary School-Aged Children with Generalized Joint Hypermobility and Symptomatic Mobile Flat Foot: Cohort Study
Authors: Dimitrieva Alena Yu. , Kenis Vladimir M.
Published: November 2021

Background. Mobile flat foot etiology and its correlations with postural imbalance remain topical issues for now, especially in children with generalized joint hypermobility. Additionally, it is poorly known that complaints prevail in children with mobile flat foot and joint hypermobility, and whether existing complaints are associated with foot deformation.

Objective. The aim of the study is to estimate medium-term effects of body balance trainings on the height of longitudinal arch of the foot and on the complaints structure in primary school-aged children with generalized joint hypermobility.

Methods. The study included 114 primary school-aged children (7–11 years old) with mobile symptomatic flat foot who were divided into four groups: I — control group of children who did not perform training; II — children who performed standard complex of rehabilitation exercises recommended for flat foot; III — children who performed a specially designed complex of exercises for body balance training; IV — children exercised on unstable platform. The foot examination included: clinical assessment of feet shape and position (FPI-6 scale), visual and manual mobility tests, computer scanning with calculation of anthropometric indices (basic anthropometric parameters were calculated from scanned foot images). Clinical evaluation of balance was carried out according to the BESS (Balance Error Scoring System) scale and computer pedobarometry. Assessment of complaints structure was carried out according to the Oxford Child Foot Condition Questionnaire.

Results. Children of control group significantly increased the number of errors in performing tests compared to the baseline data (p = 0.034) according to the BESS scale. No statistically significant changes were obtained in children of the second group (p = 0.08). Total number of errors committed by children of third and fourth groups on unstable platform decreased by 2.9 times and 3.4 times, respectively (p = 0.022 and p = 0.044). Decrease in partial load on medial longitudinal arch of foot in step cycle in average by 2.0–3.5 times compared to baseline parameters was revealed in children of third and fourth groups. Moreover, children of third and fourth groups have shown improvement in parameters regarding the shape and position of the feet by average of 1.3–1.7 times higher compared to the parameters of the feet of children performing standard complex of rehabilitation exercises (p = 0.036).

Conclusion. This study has shown the efficacy of body balance training in increasing the height of longitudinal arch of the foot and good dynamics in the structure of complaints in primary school-aged children with generalized joint hypermobility and symptomatic mobile flat foot.
Equity liquidity and tax aggressiveness in the Brazilian capital market
Authors: Prímola Bernardo Fernandes Lott , Nascimento Eduardo Mendes , Campos Octávio Valente
Published: November 2021

This study has investigated the potential relationship between equity liquidity and tax aggressiveness in the Brazilian capital market. Using a database of publicly traded Brazilian companies from 2010 to 2019 – not including the year 2020 due to the atypical effects of the COVID-19 pandemic – panel data models have been developed, the goal synthesis of which consisted in evaluating the longitudinal effects of equity liquidity, independent variable, on the book tax difference, dependent variable, and proxy of tax aggressiveness. Results have shown a statistically significant and economically positive relationship between the tax aggressiveness proxy and stockholding liquidity. Results suggests that companies with less volatile stocks, with larger relative stocks in B3 [(in full, B3 – Brasil Bolsa Balcão S.A.), formerly BMFBOVESPA, a stock exchange located at São Paulo, Brazil] businesses and lower trading costs tend to adopt a more aggressive tax planning. This article helps to demonstrate that in an emerging capital market such as the Brazilian one investor tend to belittle occasional increases in profits sparingly through more aggressive tax practices, however, which may result in future losses. Furthermore, this study helps to demonstrate the importance of disclosures about tax planning so that market agents can properly price financial assets.
Determination of Indoor Air Quality in University Student Canteens
Authors: DEDE Gülgün , DEDE Cemile
Published: November 2021

The negative effects of indoor air quality cause a decrease in the working efficiency of people, and health problems. For this reason, monitoring the indoor air quality of the places where students spend time such as canteen, cafeteria and library is important in terms of quality of life. Particulate matter is the leading source of pollutants affecting indoor air quality. For this purpose, the indoor air quality of student canteens in a public university located in Marmara Region, Turkey was examined in terms of temperature, relative humidity, person density, area, particulate matter (PM2.5 and PM10) parameters. The relative humidity in canteens was found to be within normal range in terms of comfort conditions, and the temperature was slightly higher depending on seasonal conditions and canteen conditions. It was observed that the density of people in canteens at certain hours affected PM2.5 and PM10 concentrations, and PM2.5 and PM10 concentrations increased with the increase in the number of students. It was determined that World Health Organization (WHO) limit values and air pollution regulation limit values were exceeded in canteens except E3 and A1 canteens. Due to the insufficient ventilation of the canteens, it was determined that particulate matter may pose a risk to the students and the employees of the canteen, and recommendations were made to improve the indoor air quality.
Examination of Stability Analysis of Sakarya and Turkey Scale Alcohol Use Model
Authors: TARAKÇI Recai , GÖZÜKIZIL Ömer Faruk
Published: November 2021

This paper is devoted to studying the mathematical model of the alcohol-consuming population. For this purpose, the formulation of the model including the alcohol-consuming population is presented; then the balance points related to non-alcohol use and positive alcohol use are discussed. Hurwitz theorem is used to find the local stability of the model, and Lyapunov function theory is used to investigate the global stability. The same mathematical model with alcohol use is considered for Sakarya and Turkey, individual numerical results are presented, and stability analyzes are examined. Finally, using the numerical data, a simulation is made in Matlab with the Runge-Kutta fourth-order method.
A New Game Value Approach for Infinite Interval Matrix Games
Authors: OR Aykut , SAVAŞKAN Gönül Selin
Published: November 2021

The purpose of this paper is to determine when and under which conditions the solution and game value of the infinite interval matrix games will exist. Firstly, the concept of a reasonable solution defined in interval matrix games was extended to infinite interval matrix games. Then, the solution and game value were characterized by using sequences of interval numbers (defined by Chiao, 2002) and their concept of convergence of interval numbers. Considering that each row or column of the payoff matrix is a sequence of interval numbers, we assume that each row converges to the same interval number α ̃=[α_l,α_r] and each column to the same interval number β ̃=[β_l,β_r]. In a conclusion, the existence of the solution of G ̃ is shown.
Narrative Imagination and Social Change: Instructors in Agricultural Colleges in Ethiopia Address Sexual and Gender-Based Violence
Authors: Sadati S. M. Hani , Mitchell Claudia
Published: November 2021

Ethiopia has one of the highest rates of sexual and gender-based violence (SGBV) in the world, making female students particularly vulnerable in its post-secondary institutions. Although there is extensive literature that describes the problem, mainly from the students' perspectives, what remains understudied is the role of instructors, their perception of the current issues, and what they imagine they can do to address campus-based SGBV, particularly in rural settings. In this study, we used the concept of narrative imagination to work with instructors in four Ethiopian agricultural colleges to explore how they understand the SGBV issues at their colleges and what they imagine their own role could include in efforts to combat these problems. Using qualitative narrative-based methods such as interviews and an interactive storyline development workshop, as well as cellphilming (cellphone + film) as a participatory visual method, the data were collected across several fieldwork phases. We consider how we might broaden this framework of narrative imagination to include the notion of art for social change.
THE COSTS OF CARE PROCESSES GENERATED BY THE CARE OF PATIENTS WITH DIABETES MELLITUS AS A NON-COMMUNICABLE DISEASE AND WHO SUFFER FROM EATING DISORDERS (ANOREXIA AND BULIMIA) AND SUBSTANCE ABUSE
Authors: Bosch-Frigola Irene , Coca-Villalba Fernando , Pérez-Lacasta María-José , Carles-Lavila Misericordia
Published: November 2021

INTRODUCTION:Diabetes Mellitus (DM) daily care requires personal effort.Patients must strictly:follow nutritional advice,implement lifestyle changes,and routinely and promptly take the drugs prescribed by health professionals among other guidelines.Eating Disorders(ED),such as anorexia and bulimia,are serious pathologies which can seriously affect the health of DM patients if they are not caught in time.However,if abuse of addictive substances is added to the scenario,the consequences for the health of the individual concerned can be very serious. OBJECTIVES:To analyse the variation in the cost of care processes of patients with DM(across all age groups)who also present with an ED and abuse addictive substances(caffeine,tobacco,alcohol,hallucinogens,cocaine,and opiates).These patients’ hospitalisation patterns will be considered for the time period between 2016 and 2018,and will include:type of discharge and admission,the origin of the patient,the type of care,and the patient’s needs during their hospital stay. MATERIAL AND METHODS: Database was provided by Grupo RECH–Red Española de Costes Hospitalarios–www.rechosp.org.The variables analysed included the main diagnoses of the aforementioned health problems.The following types of care were included:hospitalisation at home,in-house hospitalisation,major outpatient surgery,and emergencies,along with the type of patient discharge. METHODOLOGY:Descriptive statistics and Factorial Analysis of Mixed Data methodology(FAMD)were used to cluster the costs by main diagnoses due,jointly,to DM,ED,and the consumption of addictive substances.FactoMineR package has been used to obtain the outputs. RESULTS:There are significant increases in costs related to a patient's main diagnoses when dual pathology is included in the analysis.FAMD shows that surgical costs are similar to the use of substances such as caffeine,nicotine,hallucinogens and opiates,with alcohol standing out;that ward costs increase significantly for alcohol use;and that caffeine intake and hallucinogens are relevant in laboratory costs. CONCLUSIONS:These health problems generate distinct patterns of costs facing hospitals.They need to be identified and diagnosed before they become more serious making it necessary to establish the appropriate attention for the patient in time.
MANEJO HOSPITALARIO DE LOS PACIENTES CONSUMIDORES DE TÓXICOS DURANTE LA PANDEMIA
Authors: Nicolau-Subires Eugènia , Irigoyen-Otiñano María , Ibarra-Pertusa Lucía , Albert-Porcar Carla , Buil-Reiné Esther , Adrados-Pérez Marina , Arenas-Pijoan Laura , Sánchez-Cazalilla Marta , Torterolo Giovanni , Llorca-Bofí Vicent
Published: November 2021

Introducción y objetivos: Se ha informado de un aumento en las ventas de alcohol durante el período de confinamiento (Finlay y cols., 2020) y también del cierre de programas de rehabilitación y grupos de apoyo por medidas de distanciamiento social (Volkow, 2020). La epidemia puede impactar más en las personas vulnerables. Es muy importante abordar los síntomas de abstinencia graves y complicados del uso de sustancias (Kar y cols., 2020). Deben promoverse estrategias para mejorar la prevención de recaídas y el uso de enfoques alternativos como tecnologías de cibersalud (Capuzzi y cols., 2020). Material y métodos: Se registran variables sociodemográficas y clínicas de todos los pacientes atendidos en el único servicio de urgencias de Psiquiatría de Lérida que acuden por diagnóstico de TUS o por motivos derivados del consumo durante la pre-pandemia y durante el confinamiento. Se analiza concretamente el ingreso hospitalario revisando aspectos evolutivos durante y después del ingreso. Estudio aprobado por CEIC HUAV. Resultados y conclusiones: Los TUS representaban el 24.8% del total de visitas en pre-pandemia y el 29.2% en el confinamiento (p<0.001). En el confinamiento aumentaron las visitas por otros motivos del 4.6% al 12.5% en la línea de la falta de continuidad asistencial ambulatoria por limitaciones de las autoridades sanitarias (p=0.020). Respecto a las hospitalizaciones, no varió el porcentaje, pero sí se observó que la estancia media disminuyó de 17 a 11 días (p=0.035) y que el alta en el confinamiento era sobre todo a domicilio con 83.7% de las altas respecto al 57.1% de la pre-pandemia (p=0.047). Se acortó el tiempo hasta la visita de revisión, pero volvían antes a visitarse en urgencias (a los 86 días en el confinamiento y a los 138 días en la pre-pandemia, p=0.039). Tiempo reingreso fue menor en el confinamiento (164 días Vs 196 días en la pre-pandemia).
Crisis, Urban Fabrics, and the Public Interest: The Israeli Experience
Authors: Shadar Hadas
Published: November 2021

The relation between urbanization and pandemics is not new. In fact, the “reformative” urban plans of the late 19th and early 20th centuries sought the addition of green patches, reliable running water systems, good sanitation, and sunlight to fend off the common ailments of the industrial city. No wonder then that these urban planning elements are also compatible with the Covid-19 era, as ample green and low-density areas are supposed to ensure or at least support quality of life and good health, even amid the health crisis we face today. This article examines whether additional elements tie together urban fabrics and coping with crises, particularly pandemics. To answer this question, I examine national urban planning in the state of Israel from the mid-20th century onwards. Urban planning in Israel has implemented theories and precedents from Europe and America; however, Israeli planners have also included nationalist-ideological contents in their work, so that the state and its interests have dictated their planning. The article concludes that the state interest of producing a cohesive society has created Israeli urban fabrics with community values and proximity to green areas, which are better suited for individual coping with crises involving the denial of personal freedom, whether due to a pandemic or any other reason. Accordingly, it proposes viewing these elements as suggestive of the need for significant involvement by public representatives in future urban renewal efforts.
Digital Placemaking for Urban Regeneration: Identification of Historic Heritage Values in Taiwan and the Baltic States
Authors: Shih Chih-ming , Treija Sandra , Zaleckis Kęstutis , Bratuškins Uģis , Chen Chi-Hui , Chen Yen-Hung , Chiang Charles Tzu Wei , Jankauskaitė-Jurevičienė Laura , Kamičaitytė Jūratė , Koroļova Alisa , Lee Huei-Chen , Lektauers Arnis , Mlinkauskienė Aušra
Published: November 2021

The active use of modern technology has affected the relationship between people and place. The “digital environment” and the “digital community” are becoming an increasingly important factor in people’s daily life, leading to a loss of belonging to a place, an entire neighbourhood, and a community. In the long run, this poses risks to the unification of values and the loss of identity. In this context, the involvement of the local community in the identification and preservation of historical heritage and defining the specific values of each site is particularly important. Thus, both the attraction of the local community to specific places and the revealed potential of local tourism are promoted. Digital placemaking enters urban regeneration as a logical approach to mixing digital and physical environments and involving the local community. Several GIS-based platforms and other tools are used to identify heritage values, both tangible and intangible. Although digital placemaking is emerging worldwide, its manifestations are closely related to specific local circumstances. The article focuses on the key characteristics and configurations of the digital placemaking tools within particular communities. The study tests digital placemaking practice in the historical districts of three cities: Taipei (Taiwan), Riga (Latvia), and Kaunas (Lithuania).
The history of the Society of Eye Physicians
Authors: Gruzdev V. F.
Published: November 2021

The urgent need for the association of eye doctors in Kazan for a friendly, joint scientific work was recognized for a long time. The late director of the Kazan Ophthalmological Clinic, Emelyan Valentinovich Adamyuk, dreamed of organizing a Circle of Ophthalmologists in Kazan; but his dream was not destined to come true.
Bacterial vaginosis as a cause of preterm labor and intrauterine infection
Authors: Anokhin V. A. , Khaliullina S. V.
Published: November 2021

In recent decades, powerful anthropogenic impacts on modern ecosystems and the introduction of advances in pharmacology into medical practice have led to significant changes both in the human biocenosis itself and in the etiological structure of all infectious pathology. The traditional pathogenic agents responsible for the development of infectious diseases have been replaced by opportunistic microorganisms, which had previously exhibited their pathogenic properties comparatively rarely. Both the number and the characteristics of the pathological properties of the newly described microbes are rapidly increasing. At the same time, there are reports on the possible involvement of previously known, "normal" microorganisms in human pathology. The field of modern infectious pathology has begun to shift more and more toward the environmental problems of medicine, when all questions, from determining the etiology of a disease process to treating the patient, involve taking into account other components of the microbiocenosis. It is already obvious that the spectrum of such diseases is not limited to the traditionally known in this respect gut dysbacteriosis.
Doctor of Medical Sciences Arkady Leizerovich Gimmelfarb
Authors: Gafarov H. Z. , Valeev E. K.
Published: November 2021

May 30, 2001 was the 75th birthday and 46 years of medical and scientific activity of Arkady Leyzerovich Gimmelfarb, Head of scientific-organizational and patent-information department of Tatarstan Scientific Research Center "Restorative Traumatology and Orthopedics", honored inventor of the Republic of Tatarstan, Doctor of Medical Sciences.
Clinicoanatomic substantiation of preventing the injury of neurovascular fascicles of the anterior abdominal wall in median laparotomy and drainage of the postoperative wound
Authors: Koreiba K. A. , Ibatulin L. A. , Stroitelev L. A.
Published: November 2021

The clinical anatomy of the anterior abdominal wall and syntopy of its surface neurovascular are worked out in detail. On the basis of this the method of low traumatic median laparotomy and the method of selective drainage of the postoperative wound taking into account preservation of basic neurovascular fascicles of the anterior abdominal wall are developed and introduced.
Iodine deficiency conditions in the Tukayevsky District of Tatarstan
Authors: Zakirov Z. M. , Kharisova R. M.
Published: November 2021

Iodine is a micronutrient: the daily requirement is 100-200 mcg. The most obvious manifestation of iodine deficiency is endemic goiter. Iodine deficiency increases the frequency of congenital hypothyroidism and leads to irreversible brain damage in the fetus and newborn. In addition to pronounced forms of mental retardation, iodine deficiency causes a decrease in the intellectual potential of the entire population living in an area of iodine deficiency.
Rare combination of aortopulmonary septal defect with other heart defects
Authors: Lukanikhin V. A. , Kharitonov G. I. , Shigabutdinova N. G. , Ostroumov B. A.
Published: November 2021

Defects between the ascending aorta and the pulmonary artery are among the rare congenital heart defects (CHD), occurring at a rate of 0.27%. In 10-15% of cases this CHD is combined with patent ductus arteriosus (PDP), coarctation of the aorta. Single cases of its combination with pulmonary artery stenosis have been described in the literature. We present a case of successful correction of aortopulmonary septal defect (ASD) combined with PDP and stenosis of the bicuspid pulmonary valve.
Conjunctivities of newborns
Authors: Saidasheva Elvira I. , Buianovskaia Svetlana V.
Published: November 2021

The article is focused on the peculiarities of the clinical course of separate forms of neonatal conjunctivitis, depending on the etiological factor. It was found that more often the disease refers to nosocomial eye infection and bacterial nature. We performed the bacteriological analysis of the contents of the conjunctival cavity of 50 newborn patients being treated in the neonatal department. Our analysis indicated the leading role of gram-positive bacteria Staph. epidermidis (59.7%) and Staph. aureus (21.7%) in the development of the inflammatory process. The share of other types of pathogens, including gram-negative minor and various pathogens, is from 0.54% to 3.2%.
The cause of nosocomial infection is considered to be the pathogen that circulates in the department and acquires the features of a hospital strain. These are consistent with the results of similar studies conducted by both domestic and foreign clinicians, which are also presented in the article. Particular attention is paid to the causative agents of intrauterine infections that are dangerous for the anterior section: gonococcus, chlamydia, herpes simplex, etc. These agents often cause serious diseases in newborns (gonoblenorrhea, ophthalmic chlamydiosis, and ophthalmic herpes), in which the cornea and vision are often affected.
The article highlights the measures of primary prevention of intrapartum infection of the ocular surface in newborns, adopted in Russia. The paper presents modern approaches to selecting drugs for local antibacterial therapy of neonatal conjunctivitis, considering age restrictions for their use. Methods of laboratory diagnostics and their validity for the etiology of conjunctivitis have been described in detail. For example, the bacteriological method (inoculations in various culture media) is considered a reference (specificity 100%). The culture medium can be used to isolate bacteria, chlamydia, and mycoplasma, which allows getting clear results even with a minimal amount of microflora
Bilateral neurorethinovasculitis associated with COVID-19 infection in a girl 17 years old
Authors: Denisova Ekaterina , Demchenko E. N , Geraskina Elizaveta A. , Khrabrova Mariia A. , Panova Anna Y.
Published: November 2021

Despite dominant lung lesions, new coronavirus infection (COVID-19) can influence almost any organ, including eyes. According to modern data, frequency of eye damage by COVID-19 reaches 32%, and spectrum of clinical manifestations is diverse. Changes are observed both in the anterior (mainly conjunctivitis) and posterior (mostly retinal vascular thrombosis, optic neuritis, neuroretinitis) segments of the eye, and the timing of their occurrence varies from the first (sometimes the only) clinical symptoms of the disease to the development at the peak or during the period of convalescence from COVID-19.
In children symptomatic COVID-19 infection is diagnosed less frequently than in adults, and ophthalmic manifestations are less investigated. This article describes a case of bilateral neuroretinovasculitis in a 17-year-old girl with a mild course of COVID-19, that arose 3 weeks after the onset of the disease, which broadens the understanding of ocular manifestations of COVID-19 in children.
We emphasize that an ophthalmologist should know ocular manifestations of COVID-19, which can help in the diagnosis and further study of the frequency and spectrum of ophthalmic symptoms, especially in children
Fast Identification of Volcanic Tremor and Lahar Signals during the 2009 Redoubt Eruption Using Permutation Entropy and Supervised Machine Learning
Authors: Konstantinou Kostas I. , Ayu Rahmalia Diah , Nurfitriana Izaina , Ichihara Mie
Published: November 2021

Despite their usefulness for volcano monitoring, emergent seismic signals, such as volcanic tremor or signals generated by lahars, are difficult to identify with confidence in a timely fashion. Machine-learning algorithms offer an objective alternative to traditional methods of identifying such volcanoseismic signals, because they are able to handle quickly large amounts of data, while requiring little input from the user. In this work, we combine permutation entropy and centroid as well as dominant frequency with supervised machine learning to evaluate their potential in identifying volcanic tremor and lahar signals recorded during the 2009 Redoubt volcano eruption. The particular dataset was chosen for the reason that the properties and occurrence times of the volcanoseismic signals during the eruption are well known from previous studies. We find that the selected features can effectively discriminate both types of signals against the seismic background, especially for stations that are near the source. Results show that the identification success rate for volcanic tremor reaches up to 96%, whereas this rate becomes up to 91% for lahar signals. The calculation of the features as well as the application of the machine-learning algorithms is fast, allowing their implementation in the operational environment of a volcano observatory during a volcanic crisis. Finally, the proposed methodology can potentially be used to objectively identify other emergent seismic signals such as tectonic tremor along subduction zones, glacial tremor, or seismic signals generated during landslides.
Rethinking the Seismic History of the Gulf of Patti (Northeast Sicily, Italy): New Insights from the Local Historical Archives
Authors: D’Amico Maria , Castelli Viviana , Maugeri Monica
Published: November 2021

Improving the knowledge of the seismic history of a region plays a key role in the evaluation of recurrence relations for probabilistic seismic hazard analyses. In this study, we present the results of an investigation carried out in two local historical archives in northeast Sicily, Italy. Several letters, petitions, and reports describing the effects of some earthquakes that occurred between the seventeenth and the eighteenth centuries in the Gulf of Patti area were found and analyzed. This contributed in filling the knowledge gap about a series of moderate-to-large seismic events that were overshadowed by catastrophic earthquakes with major impacts both on human losses and cultural heritage. We describe this experience in the hope that other historians will take up the work, looking for other northeast Sicily local archives to investigate because we believe this is the right way toward a better definition of the seismic history of one of the most seismically active regions of Italy.
Creando un laboratorio virtual para dos asignaturas básicas en grados de Enfermería y Podología
Authors: Coronado Carmen
Published: November 2021

En el curso académico 2020-2021, en la Facultad de Enfermería y Podología se realizaron las clases de docencia expositiva mediante docencia telemática, y algunas clases de docencia interactiva y práctica, principalmente en materias básicas. En estas circunstancias, el e-learning se nos presenta como una estrategia formativa adecuada para resolver el problema educativo con que nos encontramos al inicio del curso. En esta experiencia se describe la transformación a metodología virtual de las clases en grupo pequeño de diez estudiantes en dos materias básicas de Grado en Podología y Grado en Enfermería con competencias del tipo saber. Se ha creado un Laboratorio Virtual de Microbiología mediante la utilización de las herramientas institucionales: Teams para proporcionar la plataforma de reunión síncrona con el alumnado, y Campus Virtual Moodle para gestionar el entorno de enseñanza telemática de manera síncrona y asíncrona. El alumnado ha respondido positivamente a la actividad académica con asistencia síncrona prácticamente del 100%, realizando el trabajo asíncrono adecuadamente, y en la adquisición de competencias. Por ello, el rendimiento académico alcanzado ha sido excelente. Consideramos que la herramienta desarrollada puede ser muy útil de manera complementaria en las clases presenciales para los próximos cursos.
3D Topology Optimization and Mesh Dependency for Redesigning Locking Compression Plates Aiming to Reduce Stress Shielding
Authors: Al-Tamimi A. A.
Published: November 2021

Current fixation plates for bone fracture treatments are built with biocompatible metallic materials such as stainless steel, titanium, and its alloys (e.g., Ti6Al4V). The stiffness mismatch between the metallic material of the plate and the host bone leads to stress shielding phenomena, bone loss, and healing deficiency. This paper explores the use of three dimensional topology-optimization, based on compliance (i.e., strain energy) minimization, reshaping the design domain of three locking compression plates (four-screw holes, six-screw holes, and eight-screw holes), considering different volume reductions (25, 45, and 75%) and loading conditions (bending, compression, torsion, and combined loads). A finite-element study was also conducted to measure the stiffness of each optimized plate. Thirty-six designs were obtained. Results showed that for a critical value of volume reductions, which depend on the load condition and number of screws, it is possible to obtain designs with lower stiffness, thereby reducing the risk of stress shielding.
Fabrication of a Lateral Flow Assay for Rapid In-Field Detection of COVID-19 Antibodies Using Additive Manufacturing Printing Technologies
Authors: A. Alrashoudi Abdulelah , I. Albalawi Hamed , H. Aldoukhi Ali , Moretti Manola , Bilalis Panayiotis , Abedalthagafi Malak , A. E. Hauser Charlotte
Published: November 2021

The development of lateral flow immunoassay (LFIA) using three-dimensional (3D) printing and bioprinting technologies can enhance and accelerate the optimization process of the fabrication. Therefore, the main goal of this study is to investigate methods to speed up the developing process of a LFIA as a tool for community screening. To achieve this goal, an in-house developed robotic arm and microfluidic pumps were used to print the proteins during the development of the test. 3D printing technologies were used to design and print the housing unit for the testing strip. The proposed design was made by taking into consideration the environmental impact of this disposable medical device.
Intimidade em Tempos Digitais: O Esquecimento da Relação Face a Face
Authors: CARLETTI Renan Silva , SAFRA Gilberto
Published: November 2021

This paper intends to discuss the notion of intimacy presented by Peter Sloterdijk and the effects of digital technology on the interfacial relationship. The objective is to show how the articulation between psychoanalysis and phenomenology presented by the German philosopher contributes to understand clinical and everyday phenomena. Through previous studies and clinical situations, we will show how the substitution of the conjunctive logic to a connective one, as presented by the Italian philosopher Franco Berardi, has generated ties that are not deeply rooted in bodily experiences. Descriptions of temporal and bodily experiences are central to understanding this change that is occurring. In this sense, we conclude that the facilities of the technology can generate a forgetfulness of the interfacial space as a memory and a gateway for the world. Palavras-chave : Intimacy; Digital technology; Face to face relationship; Body.
Tornar-se Pais: Uma Compreensão Gestáltica das Diferentes Parentalidades Contemporânea
Authors: GUALBERTO Andressa Tavares e Silva , ANDRADE Celana Cardoso
Published: November 2021

Family, a striking concept for society and culture, an important foundation of interpersonal relationships, shows changes and new models. The decision to have children is based on individual experience and achievement, no longer because of a need for a traditional nuclear family model. The study aimed to understand the experience of some family modalities in the decision to have and raise children. For this, the Gestalt Approach was chosen as the basis. The Gestalt-therapy look at the process, an integration that is never completed. The present research investigated three families models; single-parent, heterosexual and homosexual couple. The methodology used was phenomenological qualitative research. Semi-structured interviews were conducted with data analyzed by the Giorgi method. With the interviews, it was noticed that the arrival of the son brings uncertainties, questions, new divisions of tasks and resignations on the part of the families. We conclude that families experience similar experiences regardless of their model. Palavras-chave : Family; Parenthood; Qualitative phenomenological research; Gestalt therapy.
Analyzing common approaches of accident models for risk management in socio-technical systems
Authors: Kiwan M. , Berezkin D.V. , Raad M. , Rasheed B.
Published: November 2021

Statement of a problem. One of the main tasks today is to prevent accidents in complex systems, which requires determining their cause. In this regard, several theories and models of the causality of accidents are being developed. Traditional approaches to accident modeling are not sufficient for the analysis of accidents occurring in complex environments such as socio-technical systems, since an accident is not the result of individual component failure or human error. Therefore, we need more systematic methods for the investigation and modeling of accidents. Purpose. Conduct a comparative analysis of accident models in complex systems, identify the strengths and weaknesses of each of these models, and study the feasibility of their use in risk management in socio-technical systems. The paper analyzes the main approaches of accident modeling and their limitations in determining the cause-and-effect relationships and dynamics of modern complex systems. the methodologies to safety and accident models in sociotechnical systems based on systems theory are discussed. The complexity of sociotechnical systems requires new methodologies for modeling the development of emergency management. At the same time, it is necessary to take into account the socio-technical system as a whole and to focus on the simultaneous consideration of the social and technical aspects of the systems. When modeling accidents, it is necessary to take into account the social structures and processes of social interaction, the cultural environment, individual characteristics of a person, such as their abilities and motivation, as well as the engineering design and technical aspects of systems. Practical importance. Based on analyzing various techniques for modeling accidents, as well as studying the examples used in modeling several previous accidents and review the results of this modeling, it is concluded that it is necessary to improve the modeling techniques. The result was the appearance of hybrid models of risk management in socio-technical systems, which we will consider in detail in our next work.
Hybrid approaches of accident modeling for risk management in socio-technical systems
Authors: Kiwan M. , Berezkin D.V. , Hamed A.
Published: November 2021

Statement of a problem. The increasing complexity in high-tech systems leads to potentially disastrous failure models and new kinds of safety issues. This led to the development of new approaches, for modeling accidents and risk management. In recent years, extended and hybrid approaches have been gaining popularity due to their effectiveness in decision-making for the design and operation of socio-technical systems. The proliferation of these approaches makes it difficult to select the appropriate approach for a particular system. Purpose. Conduct a comparative analysis of various hybrid approaches of accidents in complex systems, identify the strengths and weaknesses of each one, and study the feasibility of their use in risk management in socio-technical systems. Results. The paper analyzes the main approaches of accident modeling (FRAM, STAMP, failure tree, AcciMap) and their limitations in determining cause-effect relationships and dynamics of modern complex systems. New approaches to safety and accident modeling in sociotechnical systems are discussed, these approaches depend on combining several models into one hybrid approach: FuzzyFTA, FRAM-ANP, ACAT-FRAM, STAMP-HFACS, AcciMap-ANP, and SD-ET-FT-ANN. A review of hybrid approaches of accident modeling in complex systems and identify weaknesses and strengths, as well as the application field of each one of these approaches. Practical importance. This study will be a guide for researchers in the field of accident modeling and risk management in sociotechnical systems. It also concludes that it is necessary to use different approaches to risk management depending on the type of risk and the complexity of the system.
Methods for constructing effective neural networks for low-power systems
Authors: Markov I.S. , Pivovarova N.V.
Published: November 2021

Formulation of the problem. The problem of using large neural networks with complex architectures on modern devices is considered. They work well, but sometimes their speed is unacceptably low and the amount of memory required to place them on the device is not always available. Briefly describes how to solve these problems by using pruning and quantization. It is proposed to consider an unconventional type of neural networks that can meet the requirements for the occupied memory space, speed and quality of work and describe approaches to training this type of networks. The aim of the work is to describe modern approaches to reducing the size of neural networks with minimal loss of the quality of their work and to propose an alternative type of networks of small size and high accuracy. Results. The proposed type of neural network has a large number of advantages in terms of the size and flexibility of layer settings. By varying the parameters of the layers, you can control the size, speed and quality of the network. However, the greater accuracy, the greater the memory volume. To train such a small network, it is proposed to use specific techniques that allow learning complex dependencies based on a more complex and voluminous network. As a result of this learning procedure, it is assumed that only a small network is used, which can then be placed on low-power devices with a small amount of memory. Practical significance. The described methods allow the use techniques to reduce the size of networks with minimal loss of quality of their work. The proposed architecture makes it possible to train simpler networks without using their size reduction techniques. These networks can work with various data, be it pictures, text, or other information encoded in a numerical vector.
Solution of the Helmholtz equation for electromagnetic waves in an annular (segmented-annular) rectangular waveguide
Authors: Semenov D.V. , Gudilin D.S.
Published: November 2021

Formulation of the problem. When designing waveguides, spatial solutions are often in demand. However, from a methodological (including educational) point of view, mostly linear-extended structures with various sectional shapes are considered. The aim of this work is to consider a waveguide as a structure composed of segments bent in a plane with a certain radius. On the other hand, this solution is common for a plane-oriented waveguide path and, in the case of an infinitely large radius, converges to a solution for a straight waveguide. Practical significance. The presented solution of the Helmholtz equation for electromagnetic waves in an annular (segmentedannular) waveguide can be considered as a methodological basis for calculating a spatially oriented rectangular waveguide path. A step-by-step solution of the Helmholtz equation for a bent rectangular waveguide is presented; a methodology for determining the parameters of the electromagnetic field in a bent homogeneous waveguide is given. Expressions are derived for determining the parameters of the electromagnetic field components for waves of type E and H. General solutions are obtained that converge at an infinitely large bending radius to harmonic functions characteristic of solutions as applied to rectilinear waveguides. This technique can be applied both for analytical evaluation or numerical calculation and spatial modeling of waveguide parameters, and for designing the waveguide path as a whole. The presence of relatively simple analytical expressions greatly facilitates the task of analyzing and optimizing the waveguide path and building software and computing systems for their assessment, modeling and development.
K1986BE92QI and STM32F103C8 microcontrollers as signal processing devices: comparative analysis
Authors: Osipov G.A. , Kudinova T.V.
Published: November 2021

The subject of the research is to compare domestic microcontroller versus foreign microcontroller while used as signal processing devices in general applications. The purpose of the research was to conduct a comparative analysis of the popular foreign microcontroller STM32F103C8T6 and its domestic analogue K1986BE92QI in plastic package through solving a typical problem in the form of a 64-point FFT computation and calculating the value of π number by the geometrical method. The obtained results are in line with those expected in terms of program execution time and stability of the debug mode in the MDKARM v5 development environment. In the course of research, the key features of working with the examined microcontrollers were identified. Practical relevance of the research consists in its practical applicability: the findings can be used as a supportive material in the creation of programmable radio engineering systems based on the microcontrollers under consideration.
Theoretical foundations of design optimization ship's control, decision-making systems and information processing
Authors: Sukhov V.V. , Ekshembiev S.Kh. , Andrianova E.G. , Gusev K.V.
Published: November 2021

Problem setting. The problems of optimizing the protection parameters of REA structures operating under complex mechanical influences, their diagnostics of quality, reliability and strength, as well as structural and parametric synthesis in the last decade are devoted to the work [1 9]. However, these works do not consider the issues of optimisation of vibration prote ction parameters and strength of structures on the basis of determination of functional dependencies of forces against deformation and damping against deformation rate for vibration insulation systems and structural elements included in the instrument. The main results given in these works relate to the determination, at best, of resonant frequencies, which is insufficient to optimize vibration protection parameters and diagnose the reliability of devices. The aim. Develop a methodological basis for the use of quality and durability control and diagnostics methods to improve the reliability of the operation of ship information and control systems in extreme operating conditions by optimizing their vibration protection. Results. The basics of modeling the designs of radio-electronic equipment devices for various mechanical influencing factors are described. Description of models and mathematical peculiarities of organization of initial data for modeling is given. When comparing design stresses and allowable stresses, the strength of the product is determined. Allowable stresses are obtained using endurance curves for each material of the device design. Simulation of the panel instrument design under vibration impact is considered and processing of its results is presented. When creating a typical product operation model, the main operating modes and levels of external influencing factors and loads of each mode are determined. The example of the console instrument shows the procedure for modeling strength and determining the value of failure-free operation. It has been found that for a given console device the most complex effect is vibration, since it creates a multi-cycle loading of the structure, which affects the strength of the product as a whole. Practical significance. The proposed approach to determination of structural strength makes it possible to find the number of loading cycles under vibration impact for each element and time operating time, as well as the calculated value of failure-free operation of the console device. This simulation can be performed at any stage of the instrument design.
Computer model of a plasma layer formed by an electron beam
Authors: Kolodko D.V. , Sorokin I.A. , Tarakanov V.P.
Published: November 2021

The problem of this work is development of scientific foundations of technological plasma processes for defect-free synthesis and processing of nanoscale structures for use in nanoelectronics. The goal of this work is development of a method for numerical calculation of the parameters of the ion flow to the sample for the real geometry of the beam-plasma installation. Results. We have created a numerical model for the development of a beam-plasma discharge by an electron beam in the absence of a buffer plasma and a longitudinal magnetic field. It is shown that the KARAT code allows us to solve the problem of developing beam instability in the absence of a buffer plasma. It was also shown that beam instability develops without a longitudinal magnetic field. The electric field created by the instability does not affect the peripheral plasma. The experimental verification of the numerical modeling results is carried out. The plasma concentration and electron temperature distributions obtained in the model are in qualitative agreement with the experimental ones. Practical significance. The model allows us to select the optimal modes of a plasma-chemical reactor based on a beamplasma discharge for the implementation of processes of defect-free ion-plasma treatment and synthesis of nanoscale structures.