Wyniki wyszukiwania - BazTech

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Building Self-Confidence by Using a Sports Bra as an Everyday Bra - a Study Based on Pressure Analysis

Ocran Francisca Margarita, Ji Xiaofen, Zhai Lina

Fibres & Textiles in Eastern Europe

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2023

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Vol. 31, no. 4

1--9

EN

Women often use sports bras when doing physical activities, but most women have recently shown interest in using sports bras as everyday bras. Therefore, this study used pressure analysis to identify a suitable sports bra that generates less pressure at the shoulder strap for all breast sizes. Among fashion design and engineering students, an interview was conducted at Zhejiang Sci-Tech University. Based on this random survey, women found more comfort in using sports bras as everyday bras, but the shoulder strap and waistband prevented them from doing it regularly. Therefore, this study emphasized only the shoulder straps because it was the most uncomfortable feature among others. More attention needs to be made to the strap width and neckline when selecting a sports bra because when it comes to females with breast sizes 34C and 36C, encapsulation types with cross-back designs are suitable. However, we noticed that the shoulder straps should be widened based on breast size. The encapsulation type with a racer back is recommended for women with breast size 38C.

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Influence of Knits Structure on Flammability and Comfortability

Mikučionienė D., Milašiūtė L., Milašius R.

Autex Research Journal

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2014

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Vol. 14, no. 4

226--232

EN

Investigations of the influence of the knit structure, i.e. the loop length and the number of yarns in a loop, on flammability and comfortability are presented in this paper. The investigations were carried out using single jersey knits from Delta TA 18 tex × 2 yarns with five variants of a loop length. Single yarn as well as folded yarn from two single yarns was used in the investigations. Comparison of the results of single-layer knits flammability and air permeability with those of multilayer packet was made. The results obtained show that an increase in the loop length of the knit increases their permeability to air and decreases the burning time as well as increase in the number of layers decreases the air permeability and increases the burning time. Moreover, the similar burning time with significantly different permeability to air can be achieved changing the basic knitting parameters, i.e. the loop length and/or the yarn linear density.

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Comfortability of the Bulletproof Vest: Quantitative Analysis by Heart Rate Variability

Lee K. C., Tai H. C., Chen H. C.

Fibres & Textiles in Eastern Europe

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2008

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Vol. 16, no. 6 (71)

39--43

EN

A verification of regressive models based on artificial neural networks and multiple regres- This paper provides an effective quantitative analysis system and verifies it. The system of heart rate variability utilizes the reactions of the cardiovascular system for the duration of excitation. The paper analyses the qualitative records of those signals of physiological reactions formed, such as heart rate variability, variation of blood pressure and some effective indexes in the time and frequency domains. The variation of the autonomic nervous system (ANS) is the fastest and most effective adjusting mechanism against the internal and external environment of a human body. Further, the heart rate variability (HRV) has the properties of non-invasion and ease and is able to determine quantitatively and differentiate the activities of the sympathetic nervous and the parasympathetic nervous systems. Through the experimental results, the activities of the sympathetic nervous and the parasympathetic nervous systems can display precisely the physiological comfortability with objective data by using the analytical instrument of heart rate variability. The comfortability of the bulletproof vest can be improved substantially by employing functional textiles such as moisture-absorbing, quick-drying, waterproof and breathable fabrics.

PL

Artykuł przedstawia efektywny system analizy ilościowej komfortu kamizelek kuloodpornych oraz jego weryfikację. System pomiaru zmian rytmu pracy serca wykorzystuje reakcje układu krążenia podczas eksperymentu analizując jakościowy zapis tego sygnału będący odpowiedzią na fizjologiczne reakcje. Analizuje się takie wielkości jak zmiany częstotliwości bicia serca, zmiana ciśnienia krwi oraz pewne parametry czasowe i częstotliwościowe pracy serca. Reakcje autonomicznego wegetatywnego układu nerwowego są najszybszym i najbardziej efektywnym mechanizmem pozwalającym badać wpływ wewnętrznych i zewnętrznych zmian bezpośredniego środowiska człowieka. Niezależnie od tego pomiar częstotliwości bicia serca jest typowym pomiarem bezinwazyjnym, łatwym do realizacji i identyfikacji. Pozwala on na zróżnicowanie aktywności układów nerwowych współczulnego i przywspółczulnego. Pomiary pozwalają na określenie fizjologicznego komfortu. Pomiary przeprowadzone z różnymi typami kamizelek kuloodpornych pozwoliły stwierdzić, że komfort może być większy poprzez zastosowanie specjalnych tekstyliów absorbujących wilgoć, szybkoschnących, wodoodpornych i dobrej przepuszczalności powietrza.