scholarly journals DEVELOPMENT OF VENTILATED CLOTHING DESIGN PRINCIPLES FOR PROTECTION AGAINST BIOLOGICAL HAZARDS

2021 ◽  
Vol 53 (3) ◽  
pp. 30-36
Author(s):  
Margarita V. Rodicheva ◽  
Anton V. Abramov ◽  
Elena M. Gneusheva
Keyword(s):  
Physical Activity ◽  
Human Body ◽  
Elevated Temperatures ◽  
Thermal State ◽  
Maximum Activity ◽  
Protective Function ◽  
Blood Sucking ◽  
Air Layers ◽  
Protection Against Infection ◽  
Heat And Moisture

A set of ventilated clothing to protect against tick-borne infections has been proposed. In addition to the protective function, such a kit allows you to normalising the thermal state of a person at elevated temperatures or physical activity by increasing the intensity of heat and moisture removal from the human body. A numerical model of heat transfer in ventilated air layers was developed. With its help, studies of heat and mass transfer were carried out under conditions of maximum activity of blood-sucking insects in the ambient temperature range of 15–25 °C. The balance of the human body was assessed for the level of physical activity typical for representatives of social groups with the highest risk of contracting tick-borne infections. It has been established that an air gap with a thickness of hag = 20 mm in ventilated clothing will provide a standard thermal state of a person and effective protection against infection with tick-borne infections.

Simultaneous determination of thickness, thermal conductivity and porosity in textile material design

2016 ◽  
Vol 24 (1) ◽  
Author(s):  
Dinghua Xu ◽  
Peng Cui
Keyword(s):  
Thermal Conductivity ◽  
Human Body ◽  
Moisture Transfer ◽  
Least Squares Method ◽  
Weighted Least Squares ◽  
Optimal Solution ◽  
Comfort Level ◽  
Textile Material ◽  
Heat And Moisture Transfer ◽  
Heat And Moisture

AbstractThe thickness, thermal conductivity and porosity of textile material are three key factors which determine the heat-moisture comfort level of the human body to a large extent based on the heat and moisture transfer process in the human body-clothing-environment system. This paper puts forward an Inverse Problem of Textile Thickness-Heat conductivity-Porosity Determination (IPT(THP)D) based on the steady-state model of heat and moisture transfer and the heat-moisture comfort indexes. Adopting the idea of the weighted least-squares method, we formulate IPT(THP)D into a function minimization problem. We employ the Particle Swarm Optimization (PSO) method to stochastically search the optimal solution of the objective function. We put the optimal solution into the corresponding direct problem to verify the effectiveness of the proposed numerical algorithms and the validity of the IPT(THP)D.

Application of Topographical Capture Techniques for Modelling Virtual Reality

2013 ◽  
pp. 970-990
Author(s):  
Mercedes Farjas Abadía ◽  
Manuel Sillero Quintana ◽  
Pedro Ángel Merino Calvo
Keyword(s):  
Physical Activity ◽  
Virtual Reality ◽  
Human Body ◽  
Research Group ◽  
3D Models ◽  
Body Segments ◽  
The Road ◽  
Representation Systems ◽  
Human Figure ◽  
Capture Techniques

Since the dawn of time man has attempted to represent the human figure with techniques ranging from simple drawings to techniques that manage to reflect the movement of body segments. In parallel, cartographic techniques have developed very advanced capture and 3D representation systems, but even though they have been applied in recent years to other sciences, they have not been applied yet to virtual reality. The appearance of the laser acquisition systems has enabled us to acquire data without discrimination on points and to get quick 3D models. This situation allows us to work directly on the concept of surface and to analyze it from the uniqueness of the detail, compared to traditional systems which capture points for, later, imaging surfaces from them. Under this prism, a research group was formed by graduates in Physical Activity and Sport and in Cartography, in order to bring together both sciences and to improve techniques of capture and representation of the human body. The road is not completely gone, but some results have been obtained and are presented in this work.

THE JUSTIFICATION OF THE SCHEME AND INDICATORS POWER HEAT FLOW IN THE HEAT REGULATION DEVICE OF MOBILE MACHINES

2015 ◽  
Vol 2 (2) ◽  
pp. 576-582
Author(s):  
Глемба ◽  
K. Glemba ◽  
Гриценко ◽  
A. Gritsenko ◽  
Аверьянов ◽  
...  
Keyword(s):  
Heat Flow ◽  
Power Density ◽  
Human Body ◽  
Thermal State ◽  
Structural Parameters ◽  
Average Power ◽  
Heat Removal ◽  
The Body ◽  
Human Operator ◽  
Weight Changes

Identifies the main factors influencing the process of formation of the thermal state of the human body. Calculated structural parameters of thermally regulating the local device. Experimental relationships between indicators of the thermal state of the human operator and the device settings. A method of calculating the power, the dependence of the heat flux conductive panels and deficit (excess) heat in the human body. Justified and selected method of controlling the heat removal from the surface of the body of the human operator using a local thermally regulating device. We present graphical dependence of changes in the average power density of the heat flow for a given rate of decline of temperature and of total body weight; changes in power density of the heat flow and human growth. To obtain comfortable temperatures the body requires an average power density of the heat flow from the surface of the human body 268 W/m2, full capacity of the heat flow will amount to 486 watts.

Assessment of physical activity of the human body considering the thermodynamic system

2015 ◽  
Vol 19 (9) ◽  
pp. 923-933 ◽  
Author(s):  
Stefan Hochstein ◽  
Philipp Rauschenberger ◽  
Bernhard Weigand ◽  
Tobias Siebert ◽  
Syn Schmitt ◽  
...  
Keyword(s):  
Physical Activity ◽  
Human Body ◽  
Thermodynamic System

scholarly journals Hubungan besar sudut sit up dengan perubahan lingkar perut pada mahasiswa Fakultas Kedokteran Universitas Sam Ratulangi

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Raja T. Todingan ◽  
Maya Moningka ◽  
Vennetia Danes
Keyword(s):  
Physical Activity ◽  
Waist Circumference ◽  
Resistance Training ◽  
Human Body ◽  
Univariate Analysis ◽  
Medical Faculty ◽  
Upper Body ◽  
Health Quality ◽  
The Mean ◽  
Mean Differences

Abstract: Abdomen is the central part of human body. Abdomen (waist) circumference >90cm in men and >85cm in women are a state of person in low health quality (obese). Sit up is one of physical activity-resistance training to abdomen muscles by lifting the upper body from lie back position then creating 90° of sit up angle. There are variations by changing the 90° of sit up angle to 45° and 120°. There are also moderately strong evidences that prove sit up changes the abdomen adiposity, so it wills benefits health quality. The goals of this study are not only to understand the correlation between sit up angles and changes of waist circumference but also to compare the changes of waist circumference between sit up angle 45°, 90° and 120°. 25 Students of Medical Faculty of Sam Ratulangi University were divided into 3 groups of sit up angle (45°,90°and 120°), each sample instructed to do 50 sit ups a day within 15 days of study. Before the first day of training and the last day after training, waist circumference was measured. Then, data were analyzed by IBM SPSS version 20 with the univariate analysis test. IBM SPSS version 20 with the univariate analysis test (α= 0, 05) shows the mean differences of waist circumference in group 45° sit up angle is 10 mm (p= 0,015), in group 90° sit up angle is 12,22 mm (p= 0,005), and in group 120° sit up angle is 13,75 (p= 0,045). Conclusion: There’s significant correlation between sit ups angle (45°, 90°, 120°) and waist circumference changes (p<α=0,05). The most significant correlation shown in group of 90° sit up angle. Keywords: sit up, waist circumference, sit up angle, waist circumference changesAbstrak: Perut adalah bagian sentral dari tubuh manusia. Ukuran lingkar perut >90cm bagi pria dan >85cm bagi wanita adalah tanda rendahnya kualitas kesehatan seseorang (obesitas). Sit up merupakan salah satu aktivitas fisik-latihan resistensi yang gerakannya melatih otot-otot perut mengangkat beban tubuh sampai membentuk sudut 90° dari posisi berbaring. Variasi dari sit up antara lain dengan mengubah sudut sit up dari 90° menjadi sudut 45° dan 120°. Sit up memiliki bukti cukup kuat mengurangi ukuran lingkar perut yang akhirnya meningkatkan kualitas kesehatan. Tujuan penelitian ini adalah mengetahui hubungan sudut sit up dengan perubahan lingkar perut dan juga mengetahui perbandingan perubahan lingkar perut pada sudut sit up 45°, 90° dan 120°. 25 mahasiswa fakultas kedokteran UNSRAT dibagi dalam tiga kelompok sudut sit up (45°,90°dan 120°), tiap sampel diinstruksikan untuk 50 kali sit up sehari selama 15 hari penelitian. Sebelum latihan hari pertama dan setelah latihan hari ke-15 dilakukan pengukuran lingkar perut. Kemudian data dianalisa dengan uji analisis univariat menggunakan aplikasi pengolah data statistik IBM SPSS version 20. Uji analisis univariat IBM SPSS version 20 dengan α= 0,05 didapatkan perbandingan rata-rata perubahan lingkar perut pada sudut sit up 45° adalah 10 mm (p = 0,015), pada sudut sit up 90° adalah 12,22 mm (p = 0,005), sedangkan pada sudut sit up 120° adalah 13,75 mm (p = 0,045). Simpulan: Terdapat hubungan signifikan antara sudut sit up dengan perubahan lingkar perut (p<α=0,05). Hubungan sangat signifikan didapat pada sudut sit up 90°. Kata kunci: sit up, lingkar perut, sudut sit up, perubahan lingkar perut

scholarly journals Effects of physical activity on prolactin and thyroid hormones

2021 ◽  
Vol 2 (3) ◽  
pp. 25-29
Author(s):  
T. Yu. Demidova ◽  
D. V. Skuridina ◽  
A. S. Kochina
Keyword(s):  
Physical Activity ◽  
Energy Metabolism ◽  
Thyroid Hormones ◽  
Pituitary Gland ◽  
Human Body ◽  
Anterior Pituitary ◽  
High Stress ◽  
Anterior Pituitary Gland ◽  
Physiological Processes ◽  
Adaptive Reactions

Thyroid hormones thyroxine and triiodothyronine, as well as the hormone of anterior pituitary gland prolactin, play an important role in various physiological processes in the human body. In high-stress situations, these hormones act to maintain homeostasis. One of the severe stressors is physical activity. Prolactin and thyroid hormones control the energy metabolism during physical activity, and are also an important link in adaptive reactions in response to physical activity.

scholarly journals Features of transcutaneous penetration of lead into the human body

2021 ◽  
Vol 100 (1) ◽  
pp. 55-59
Author(s):  
Nikolay A. Kashuba
Keyword(s):  
Physical Activity ◽  
Particle Size ◽  
Lactic Acid ◽  
Human Body ◽  
Inorganic Compounds ◽  
The Body ◽  
Whole Body ◽  
Sweat Glands ◽  
Mechanical Methods ◽  
Intense Physical Activity

Introduction. One of the features of lead is its high ability to disintegrate and significantly contaminate the environment. The contamination of hands or the whole body with lead creates a high probability of penetrating micro- and nanoparticles through the skin into the body. Nowadays, this process is not sufficiently studied. There is evidence that inorganic compounds or metallic particles of lead can penetrate through the skin into a human body. Material and methods. centrifuge 10000 rpm, laser emitter (wavelength 625-740 nm), optical microscope, voltampermetric analyzer ABA-2, Analysette 12 Dyna Sizer, magnetic stirrer, distiller, Na2S solution. The studies were conducted in 2017-2018 among the workers of battery sections of technical service stations in Ternopol - 17 people. The research results were processed by the statistical package SPSS 19. Results. The process of mechanical contamination by the skin with lead, rejection of micro particles from the surface of lead, and, to a lesser extent, ultrafine nanoparticles, which can penetrate the sweat glands, was established to occur. The studies have shown in the washings from the palms particles’ skin are detected mainly in the size of 1 μm - 100 nm. In the process of finding the particles of lead in the sweat glands, their length decreases to Nanoscale, allowing them freely entering the body. The decrease in particle size in the sweat glands occurs due to the formation of soluble lead compounds. Presumably, the main chemical contributing to this process is lactic acid. With increasing exposure, the size of lead particles in the sweat glands decreases. Intensive cleaning of the skin surface by mechanical methods, and detergents, followed by contamination with lead, promotes the penetration of lead particles into the sweat glands and its further spread in the body. The intense physical activity was established to contribute to a decrease in particle size, which suggests chemical interaction of lead with lactic acid and the formation of soluble lead lactate. The assumption is confirmed by studies of the composition of sweat, which is detected lead lactate. Conclusion. The lead ability to penetrating a human body transcutaneously in the form of nanoparticles and soluble compounds has been proven. Intense physical activity facilitates the penetration of lead into the body.

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