bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effects of temperature on electrical impedance of biological tissues: ex-vivo measurements
Authors: Dipa Safia Aktar , Pramanik Muralee Monohara , Rabbani Mamun , Kadir Muhammad Abdul 
Published: September 2024

Abstract
Bioelectrical impedance techniques have been useful in various applications, including body composition analysis, impedance plethysmography, impedance cardiography, lung ventilation, perfusion, and tissue characterization. Electrical impedance methods have also been useful in characterizing different foods like meat, fruits, and beverages. However, the temperature of tissue samples can change their dielectric properties, affecting their impedance. This research investigated the effects of temperature on the impedance of various biological tissues over the frequency range of 10 Hz to 5 MHz. Freshly excised animal tissues (lamb, cow, chicken), fish, fruits, and plants were considered as biological samples. The samples were placed in a test cell and submerged in a water bath heated by a hot plate to vary the temperature. Impedance measurements were conducted using a bioimpedance spectrometer in 2 °C steps within the temperature range of 20 °C to 50 °C. Impedance values decreased with increased temperature across all measurement frequencies for all biological samples. Curve fitting indicated that impedance decreased linearly with temperature, with a mean correlation coefficient of 0.972 for all samples. For all biological samples under investigation, the relative impedance change ranged from −0.58% to −2.27% per °C, with a mean and standard deviation of (−1.42±0.34) %/°C. On average, animal samples exhibited a higher relative temperature coefficient of −1.56% per °C (±0.41) across the frequency range, compared to −1.31% per °C (±0.26) for fruit and vegetable samples. Additionally, the relative temperature coefficient values were generally higher at lower frequencies than at higher frequencies. The findings of this research can be valuable for studies or biomedical applications involving variable tissue temperatures.
Inverse-Kinematics Steering Laws for Double-Gimbal Scissored-Pair Control Moment Gyros
Authors: Kojima Hirohisa , Kawamoto Ryo , Keshtkar Sajjad 
Published: September 2024

The generalized singularity robust inverse steering law (GSRISL) is widely used to avoid singularity problems in control moment gyroscopes (CMGs). However, GSRISL tends to generate perturbation torques near singularities, which hinder highly accurate attitude tracking control. Model predictive steering control can eliminate the necessity of considering singularities, but its implementation in satellites remains challenging because of its high computational cost. Therefore, the development of a steering law that avoids explicit consideration of internal singularities and costly calculations is critical. The inverse-kinematics steering law (IKSL) is one such law removing the need for the calculation of the inverse matrix. The double-gimbal scissored-pair CMG (DGSPCMG) addresses the singularity problem as it does not have internal singularities except along the outer gimbal axis. To enhance the attitude control by removing the need for the calculation of the inverse matrix, this study proposes the combining of IKSL with DGSPCMG. Additionally, to mitigate the risk of gimbal mechanical failure, the IKSL for inner or outer gimbal axes failure was designed by relaxing the identical steering constraint of the scissored-pair gimbal angles. Numerical simulations were performed to evaluate the effectiveness of the combination of IKSL and DGSPCMG in terms of settling time and maneuvering axis accuracy.
INFLUENCE OF NANO-SIZED ZINC OXIDE ON THE PROPERTIES OF POLYTETRAFLUOROETHYLENE
Authors: Иванов А.А. , Васильев А.П. , Охлопкова А.А. 
Published: September 2024

В настоящее время при разработке антифрикционных материалов актуальным становится использование полимерныхкомпозиционныхматериалов (ПКМ) на основе полимерной матрицы с самосмазывающимися свойствами. Антифрикционные материалы находят широкое применение в разных узлах трения техники и технологического оборудования. В качестве основы ПКМ отлично показывает себя политетрафторэтилен (ПТФЭ), который обладает широкимдиапазономрабочих температур и низкимкоэффициентомтрения. Однако ПТФЭ имеет недостатки в виде высокой скорости массового изнашивания и хладотекучести. Для устранения недостатков в полимер вводят различные наполнители, в особенности дисперсные наноразмерные частицы, так как они показывают существенное влияние на эксплуатационные характеристики. В данной работе в качестве наполнителя был использован наноразмерный оксид цинка, который предварительно подвергнут ультразвуковому воздействию. Исследованы физико-механические, триботехнические свойства и термодинамические параметры ПКМ. Триботехнические исследования показали повышение износостойкости ПКМ при сохранении низкого значения их коэффициента трения. Поверхность трения материаловисследовали методом ИК-спектроскопии, где выявлено протекание трибохимических реакций. Разработанные материалы благодаря улучшенным триботехническим свойствам могут найти применение в качестве уплотнителей в узлах трения машин и техники.Currently, in the development of antifriction materials, the use of polymer composite materials (PCM) based on a polymer matrix with self-lubricating properties is becoming relevant. Antifriction materials are widely used in various friction units of machinery and technological equipment. Polytetrafluoroethylene (PTFE), which has a wide range of operating temperatures and a low coefficient of friction, performs well as a PCM base. However, PTFE has the disadvantages of high mass wear rates and cold flow. To eliminate the shortcomings, various fillers are introduced into the polymer, especially dispersed nano-sized particles, as they have a significant impact on performance characteristics. In this work, nanosized zinc oxide was used as a filler, which was previously subjected to ultrasonic treatment. The mechanical, tribological properties and thermodynamic parameters of PCM have been studied. Tribological studies have shown an increase in the wear resistance of PCM while maintaining a low value of their friction coefficient. The friction surface of the materials was studied by IR spectroscopy, where the occurrence of tribochemical reactions was revealed. Thanks to their improved tribological properties, the developed materials can be used as seals in friction units of machines and equipment.
К 100-летию со дня рождения профессора Льва Анатольевича Скорнякова (14.02.1924–26.05.1989)
Authors: Vechtomov E.M. 
Published: September 2024

The article considers the life path of L. A. Skornyakov as a scientist, teacher, educator, and human being. His contribution to mathematics, to the training of highly qualified scientific and pedagogical staff is analyzed.
Рассматривается жизненный путь Л. А. Скорнякова как ученого, учителя, просветителя, человека. Анализируется его вклад в математику, в подготовку высококвалифицированных научно-педагогических кадров.
Хирургическое лечение рубцовых стенозов трахеи после осложненного течения коронавирусной инфекции
Authors: Pechetov A.A. , Lednev A.N. , Makov M.A. , Khlan T.N. , Volchanski D.A. 
Published: September 2024

Novel Coronavirus Infection (COVID-19) is a rapidly spreading pandemic disease worldwide that has created significant public health challenges. According to statistics, about 5-12% of patients with COVID-19 need hospitalization and treatment in intensive care units. Given the most common respiratory system injury, most intensive care patients require oxygen therapy and long-term artificial lung ventilation (ALV). Post-intubation and post-tracheostomy tracheal stenosis is an iatrogenic complication that occurs in 10–22% of patients after prolonged mechanical ventilation among the entire patient pool, while the frequency of cicatricial tracheal stenosis after a complicated course of COVID-19 coronavirus infection remains unknown. This paper presents the features of diagnosis and surgical treatment.
По статистике, около 5–12% пациентов с COVID-19 нуждаются в госпитализации и лечении в отделениях интенсивной терапии. С учетом наиболее частого поражения дыхательной системы, большинству реанимационных пациентов требуется оксигенотерапия и длительная искусственная вентиляция легких (ИВЛ). Постинтубационный и посттрахеостомический стеноз трахеи – это ятрогенное осложнение, которое возникает у 10–22% пациентов после длительной ИВЛ среди всего пула пациентов, в то время как частота рубцовых стенозов трахеи после осложненного течения коронавирусной инфекции COVID-19 остается неизвестной. В данной работе представлены особенности диагностики и хирургического лечения.
натомическая оценка параселлярных треугольников средней черепной ямки
Authors: Pullanna B. , Avadhani R. , Viveka S. , Shastry A. 
Published: September 2024

The objectives of this study were to delineate the borders of parasellar middle cranial fossa triangles and to morphometrically evaluate of these triangles. Methodology: in a cross-sectional observational study design, conducted in Department of Anatomy from May 2021 to August 2022, borders, morphometry and contents of parasellar middle cranial fossa triangles were delineated in fifteen cranial fossa specimens. Results: the medial border of clinoid triangle formed by optic nerve was the shortest with average length of 7.64 mm (± 0.59 mm) and lateral border formed by oculomotor nerve was the longest with average measurement of 14.5 mm (± 1.46 mm). The medial border of oculomotor triangle formed by interclinoid dural fold had average length of 9.05 mm (±1.07 mm) and lateral border formed by anterior petroclinoid dural fold had average measurement of 14.38 mm (±2.61 mm). The oculomotor nerve forming the medial limit of supratrochlear triangle measured 10.81 mm (±1.25 mm) and lateral trochlear nerve border measured 14.94 (±1.08 mm). Conclusion: morphometric measurements of parasellar middle cranial fossa triangles, namely, clinoid triangle, oculomotor triangle, supratrochlear and infratrochlear triangle are presented.
Разнообразие хирургических подходов к параселлярной области требует глубокого понимания микрохирургической анатомии. Целью данного исследования было определение границ параселлярных треугольников средней черепной ямки и морфометрическая оценка этих треугольников.Материалы и методы: в ходе перекрестного наблюдательного исследования, проведенного на кафедре анатомии с мая 2021 по август 2022 г., на пятнадцати образцах черепной ямки были определены границы, морфометрические параметры и содержимое параселлярных треугольников средней черепной ямки. Результаты: медиальная граница клиновидного треугольника, образованная зрительным нервом, была самой короткой, составляя в среднем 7,64 мм (± 0,59 мм) в длину, а латеральная граница, образованная глазодвигательным нервом, была самой длинной и достигала в среднем 14,5 мм (± 1,46 мм). Средняя длина медиальной границы глазодвигательного треугольника, образованной межклиновидной складкой твердой мозговой оболочки, составила 9,05 мм (±1,07 мм), а латеральной границы, образованной передней петроклиновидной складкой твердой мозговой оболочки, - 14,38 мм (±2,61 мм). Глазодвигательный нерв, формирующий медиальную границу супратрохлеарного треугольника, имел длину 10,81 мм (±1,25 мм), а латеральная граница по блоковому нерву - 14,94 мм (±1,08 мм). Заключение: представлены морфометрические параметры параселлярных треугольников средней черепной ямки: клиновидного треугольника, глазодвигательного треугольника, надблокового и подблокового треугольников.
Studi Kasus Sepsis pada Stroke Hemoragik
Authors: Roskaraulya Chaira Khuntum , Maulina Meutia 
Published: September 2024

Stroke merupakan penyakit gangguan fungsional otak berupa kelumpuhan pada saraf (defisit neurologis) akibat gangguan aliran darah pada salah satu bagian otak. Data di Indonesia memperlihatkan stroke sebagai penyebab Kematian terbanyak ketiga dengan angka kematian sebanyak 138.268 jiwa atau 9,7% dari total kematian. Penyakit stroke dibagi menjadi dua macam yaitu stroke iskemik dan stroke hemoragik. Stroke hemoragik terjadi akibat pecahnya pembuluh darah di otak. Kondisi tersebut menimbulkan gejala neurologis yang terjadi secara tiba-tiba dan seringkali diikuti gejala akibat efek desak ruang atau peningkatan tekanan intrakranial (TIK). Terdapat risiko tinggi terjadinya sepsis dengan kejadian stroke hemoragik akibat disregulasi respon imun. Hipertensi tak terkontrol merupakan faktor risiko ytang mendominasi pada stroke hemoragik. Penegakan diagnosis memerlukan pemeriksaan Computed Tomography Scan (CT-Scan) yang menjadi gold-standar. Pemeriksaan laboratorium juga perlu untuk memperbaiki faktor risiko yang ada pada pasien. Tindakan medis pada stroke hemoragik ditujukan agar penderita tetap hidup dengan harapan perdarahan dapat berhenti secara spontan.Tindakan medis yang dilakukan pada penderita stroke hemoragik meliputi: tindakan operatif, tindakan konservatif, dan pengendalian peningkatan TIK. Metode yang digunakan adalah menggunakan studi kasus. Studi kasus ini membahas Tn. I 59 tahun dengan stroke hemoragik dengan faktor risiko gaya hidup yang tidak sehat yaitu, merokok dan pola makan yang berlemak dan kolesterol tinggi, serta hipertensi dengan melakukan anamnesa, pemeriksaan fisik, dan penunjang serta melakukan penatalaksanaan dan edukasi yang mungkin diterapkan pada pasien di masa mendatang.
DETERMINATION OF MALNUTRITION, FRAILTY, POLYPHARMACY, MULTIMORBIDITY, AND MORTALITY RISK IN HOSPITALIZED ELDERLY COVID-19 PNEUMONIA CASES WITH AND WITHOUT POSSIBLE SARCOPENIA
Authors: MERCAN BAŞPINAR Melike , GÜDEN Aysel , ÇALIK Mustafa , MAVİŞ Osman , KAMAT Sadettin , BAŞAR Hakan 
Published: September 2024

Introduction: To evaluate elderly COVID-19 pneumonia hospitalizations via the presence of possible sarcopenia, hand grip strength measurements, malnutrition, frailty, polypharmacy, multimorbidity, mortality risk and 30th-day mortality after discharge. Materials and Method: This observational study included geriatric patients in the COVID ward of Gaziosmanpasa Training and Research Hospital between March 1, 2022, and April 30, 2022. SARC-F screening test, hand grip strength measurement, CALL score for mortality risk, KATZ Index of Independence in activities of daily living, Mini Nutritional Assessment-Short Form, BORG dyspnea scale, and Frail scale were administered. 30th-day mortality after discharge was recorded during follow-up using phone calls. Results: Distribution of 75 cases aged 76.6±8.2 years was as follows: 65.3% (n =49) possible sarcopenia, 49.3% (n =37) malnutrition, 49.3% (n =37) polypharmacy,70.7% (n =53) multimorbidities. 30th-day after-discharge mortality was 24.0% (n =18). The length of hospital stay, activities of daily living, frailty, D-dimer level, albumin, and oxygen requirement were significant in the possible sarcopenia group compared to non-sarcopenia group (p =0.003, p = 0.012, p =0.012, p =0.007, p =0.004, and p =0.015, respectively). Impaired hand grip strength was related to a higher CALL risk score (r =-0.343; p =0.003), higher drug use and disease counts (r =-0.387, p =0.001 and r =-0.321; p =0.005), prolonged length of hospital stay (r=-0.315; p=0.006), and higher oxygen requirement (r =-0.240, p =0.038). Conclusion: COVID-19 pneumonia hospitalizations of geriatric patients are significantly accompanied by possible sarcopenia. The measurement of hand grip strength was emphasized to determine associations with the length of hospital stay, malnutrition, and 30th-day discharge mortality of hospitalized COVID-19 pneumonia in the elderly. Keywords: Pneumonia; COVID-19; Sarcopenia; Frail Elderly; Malnutrition; Mortality.
The Impact of the New Year Celebration on the Air-Pollution in Slovakia
Authors: Iľko Ivan , Peterkova Viera , Maniak Jozef , Štefánik Dušan 
Published: September 2024

Fireworks and pyrotechnics are an integral part of the New Year celebration that take place both in cities and rural areas as well. Depending on the meteorological conditions, these activities can raise air pollutant concentrations in ambient atmosphere. In order to estimate the size of this increase, air pollutant concentrations from up to 61 air quality stations situated in the Slovak Republic in period from 2010 to 2023 are analysed. Pollutant concentrations of PM10, PM2.5, CO, NO2, SO2, O3 and benzene from New Year's Eve evening to New Year's morning are compared with data from 25 December to 7 January. In case of PM10 557 cases were analysed. Among them in 64 % the significant exceedance in concentrations which can be attributed to the New Year celebration with high probability was observed. The statistical difference between mean PM10 concentrations during the New Year celebration hours and during the surrounding days was strong (p ≤ 0,001). For PM2.5 the situation was similar. The New Year celebration affects other pollutant concentrations studied in this work in less extend. For them it is difficult to attribute the exceedance to the fireworks. This analysis provides clear evidence of the negative impact of fireworks and pyrotechnics on the air quality, which can lead to public health risks. This work can support policy makers to implement more stringent strategies to reduce air pollution and its effects on health.
Gamificando a aprendizagem sobre desobstrução de vias aéreas por corpo estranho a partir de um serviço de formulário online
Authors: Costa Ferreira Suiane , Dos Santos Batista Mayara 
Published: September 2024

No ensino superior, os cursos da área da saúde ainda ministram os conteúdos de primeiros socorros em disciplinas com metodologias tradicionais, muito centradas no falar-ditar do professor. Este artigo apresenta como objetivo a elaboração e avaliação de uma atividade gamificada para aprendizagem sobre desobstrução de vias aéreas por corpo estranho a partir de um serviço de formulário online junto a acadêmicos da área da saúde. A gamificação foi estruturada na plataforma Google Forms a partir da técnica de storytelling e de outros princípios básicos da gamificação como, desafio por meio de níveis, a orientação de metas e a definição clara dos objetivos por meio das explicações, as realizações e conquistas por meio dos feedbacks imediatos e a orientação divertida por meio do enredo. Posteriormente esse formulário foi avaliado por estudantes da área de saúde, por meio do Índice de Validade de Conteúdo, alcançando uma boa avaliação geral dos seus itens e subitens, exceto no subitem relacionado a tamanho e fonte adequados para a leitura.
Consumo de sustancias psicoactivas en estudiantes universitarios: riesgos, prevención y promoción de la salud
Authors: Richard GM , Carbonetti MJ , Presman C , De San Jorge X , Beverido P 
Published: September 2024

Introducción:El diagnóstico de factores de riesgo ligados al consumo de drogas en estudiantes universitarios responde los objetivos internacionales para promover las universidades saludables para contribuir a la formación integral de los estudiantes y de mejorar la prestación servicios de extensión a la comunidad, en perspectiva de salud integral.Objetivos:Vincular presencia de factores de riesgo con rol social en alumnos universitariosMaterial y método:Estudio: transversal, correlacional.Instrumento: El cuestionario de múltiple opción cuantitativa adaptado del ya validado por Red Veracruzana de Investigación en Adicciones. auto administrado, voluntario, anónimo, en universo de alumnos asistentes a TP de materia de 3er año de medicina. Datos analizados con EPI-INFO 2010Resultados:Año: 2017. Muestra: 45 alumnos carrera de medicina. 69% de mujeres, 29% de varones, entre 20 y 40 añosEl 68.9% de los alumnos universitarios son conscientes de estar en posición que permite desarrollar liderazgo para ayudar a mejorar calidad de vida de la poblaciónel 21% alguna vez consumió marihuana, el 2,7% cocaína, el 6,7% metanfetaminas, el 5,4 solventes inhalables, el 6,7 alucinógenos, el 2,7% crack, y 64% alguna vez consumió alcohol en los últimos 30 días, Usan preservativo algunas veces 26.7%, nunca 13.3% Conducen algún vehículo motorizado 44.4% (alcohol); 17.8% (otras drogas)El 71,1% recibió alguna capacitación para la prevención del consumo de drogas: 17.8% en la primaria, 44.4% en la secundaria, 6.7% en la universidad, 20% nunca.Creen que pueden aportar en actividades preventivas para niños 71.1%, adolescentes 66.7%, embarazadas 68.9% Se autoperciben con competencias para colaborar con ellas en el 60% Disposición a colaborar el 48.9%, dedicando entre 1 y 5 hs. semanales.Interés en participar en un curso sobre prevención integral del consumo de drogas el 40% Conclusiones:Los alumnos universitarios creen en su rol como líderes para el mejoramiento de la calidad de vida de la sociedad. Se observan situaciones de riesgo ligadas al consumo de drogas no compatibles con ejercicio de dicho rol.La información preventiva que disponen proviene principalmente del trayecto preuniversitario. Esto puede incidir en las prácticas de riesgo identificadas y en la incompetencia para llevar a cabo su liderazgo eficientemente.
Escolarización paterna, desarrollo y la crianza en la primera infancia. Centros de Atención Primaria de Salud, Municipalidad de Córdoba.
Authors: Bezzone N , Lodeyro P , Spaini L , Luna L , Heredia E , Vieitez A , Turello P , Fernández R 
Published: September 2024

IntroducciónEl desarrollo psicomotor del niño tiene que ver con la expresión de sus potencialidades para su desempeño en la vida. Los determinantes sociales, incluyendo prácticas de crianza y ambiente familiar, tienen un impacto crucial en el mismo, siendo factores protectores o de riesgo. ObjetivoAnalizar el nivel de escolarización de los padres en relación al desarrollo psicomotor, práctica de crianza y ambiente familiar en niños/as menores de 5 años atendidos en los centros de atención de primer nivel del sistema de salud municipal de Córdoba, año 2016.Material y MétodoEstudio observacional, transve rsal y prospectivo (2016). Instrumentos aplicados: Prueba Nacional de Pesquisa (PRUNAPE), Instrumento de Prácticas de Crianza del Grupo Interdisciplinario de Estudios Psicosociales y Cuestionario de Ambiente Familiar. Se trabajó con binomio madre-niño (< 5 años), asistidos en control del niño sano en las 6 zonas sanitarias del Sistema de Salud Municipal de Córdoba, aleatorizando dos centros por zona, n=240 binomios. Análisis de datos: distribución de frecuencias y comparaciones con test de X2 o Irwin Fisher. Se consideró un nivel de confianza del 95%. Se contó con los resguardos éticos correspondientes.ResultadosAl evaluar los años de escolarización de padre y madre por zonas sanitarias no se observaron diferencias. La frecuencia de madres con menos de 9 años de escolarización es superior a las que poseen más de 9 años (57,55% y 42,45% respectivamente p<0,01), situación similar se observa con los padres (64,49% y 35,51%; p<0,0001). El resultado de PRUNAPE no se asoció a los años de escolarización de la madre y el padre. Respecto a las prácticas de crianza, la frecuencia de niños/as en situación de riesgo es mayor en aquellos cuyas madres o padres poseen menos de 9 años de escolarización (46,81% y 30,10% respectivamente, p<0,01). La frecuencia de niños/as en situación de riesgo respecto al ambiente familiar es mayor cuando madres y/o padres poseen menos de 9 años de escolarización (21,52% y 5,81% respectivamente, p<0,01).ConclusiónEl análisis de riesgo realizado permite visualizar el nivel de protección que le da al desarrollo infantil la escolarización de los padres.