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    Wyświetlanie 1-5 z 5
    Tytuł:
    Engineering of Knitted Cotton Fabrics for Optimum Comfort in a Hot Climate
    Opracowanie dzianin bawełnianych dla uzyskania optymalnego komfortu w gorącym klimacie
    Autorzy:
    Mal, P.
    Ghosh, A.
    Majumdar, A.
    Banerjee, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/232257.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    air-permeability
    optimum comfort
    single objective optimization
    thermalconductivity
    UPF
    przepuszczalność powietrza
    komfort
    przewodność cieplna
    Opis:
    Cotton knitted fabrics are popular for summer-wear and outer-wear due to their comfort. The typical porous structure of knitted fabrics, however, increases the risk of exposure of human skin to UV rays, resulting in skin cancer. Therefore a trade-off is required between the comfort and UV ray resistance of the fabric. In this study, an attempt was made to engineer single jersey and 1×1 rib knitted fabrics with optimum comfort and desired UV resistance. It was found that 1×1 rib knitted fabrics could provide better comfort and UV protection with respect to single jersey fabrics manufactured on the same gauge knitting machine.
    Dzianiny bawełniane są bardzo popularne dla ubrań noszonych latem ze względu na możliwość uzyskania wysokiego komfortu noszenia. Typowa porowata struktura dzianin powoduje jednak wzrost ryzyka wystawienia skóry na promieniowanie UV mogące prowadzić do raka skóry. Dlatego należy uzyskać kompromis pomiędzy komfortem noszenia a odpornością na promieniowanie UV. W pracy przeprowadzono próbę opracowania dzianiny lewo-prawej i dwu-prawej 1x1 o optymalnych właściwościach komfortu i jednocześnie wymaganej odporności na promieniowanie UV. Stwierdzono, że dzianina dwu-prawa 1x1 może zapewnić lepszy komfort i ochronę przed UV w porównaniu do dzianiny lewo-prawej produkowanej przy tych samych parametrach maszyny dziewiarskiej.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2016, 2 (116); 102-106
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cardio-respiratory status of stone grinders and brick field workers from west Bengal, India
    Autorzy:
    Mandal(Majee), A.
    Majumdar, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1916523.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    Cardio-respiratory status
    stone grinders
    brickfield workers
    Opis:
    Introduction: Quartz crushing and brick making industry are informal and demands heavy manual labour. They are socio-economically backward and are unable to avail of social security’s scheme meant for protection of the health and welfare of Indian workers. Purpose: To evaluate cardiovascular and respi-ratory status of stone grinders and brickfield workers and to compare the above parameters with the control group. Materials and methods: This cross-sectional study was carried out among 94 stone grinders and 82 brick field workers of West Bengal. They are mainly exposed to stone dust particles, silica dust and fumes. Pulmonary function and cardiovascular parameters were measured, and respiratory impairments were assessed by questionnaire. Results: Pulmonary function parameters, including breath holding time significantly reduced among these occupational groups of workers. But maximum oxygen consumption values were significantly higher than any other industrial workers of West Bengal. Workers of the above mentioned occupation showed restrictive type of lung impairment and prevalence of chest pain, and chronic cough (chronic bronchitis) were much higher than the control group workers. Stone grinders (42.6%) and brick field workers (78%) were in the pre-hypertensive state which is much higher than other industrial workers of West Bengal. BMI and skinfold thickness values of the above mentioned occupational workers were much lower than controls as well as other industrial groups of workers indicating severe nutritional deficiency among them. Conclusion: Thus the environmental stress and nutritional status of these two occupational groups of workers affect the cardio-respiratory status among them, which can be prevented by use of protective gadgets, use of modern engineering techniques, proper health education and awareness.
    Źródło:
    Progress in Health Sciences; 2014, 4, 2; 111-122
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Can physical training minimize the gender differences in lung capacity of trained tennis players aged 14-17 years old?
    Autorzy:
    Pandit, N.
    Banik, S.
    Prasad, S.K.
    Majumdar, P.
    Banerjee, O.
    Bandyopadhyay, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1795.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Opolski. Instytut Nauk o Zdrowiu
    Tematy:
    male
    female
    lung capacity
    sport
    tennis player
    gender difference
    physical training
    tennis
    Opis:
    Background: This study was based on gender differences in male and female trained tennis players. Aim of the study: The aim of this study was to determine the extent that physical training could minimize the gender differences in lung capacities in trained tennis players aged 14–17 years. Material and methods: The participants were ten male and seven female lawn tennis players, with a mean ± standard deviation (SD) age of 15.5 ± 1.27 and 14.43 ± 1.13 years, respectively. Physical characteristics and lung volumes were measured on the same day for each participant. Data were presented as mean ± SD, and Student’s t-test to compare the measured variables was performed. Results: Differences between genders were insignificant in terms of age (years), weight (kg), body fat (%), lean body mass (kg) and chest circumference (cm). However, height (cm), and W/H ratio were significantly (p < 0.05) higher in male tennis players in comparison to female players. Insignificant differences were found for TV (L), SVC (L), FVC (L), FEV1 (L), FEV1/FVC (%), FEF25-75% (L/s), PEF (L/s) and MVV (L/min). The only significant difference (p < 0.05) in lung function measures between male and female trained tennis players was for PIF (L/s). Conclusions: Male tennis players were taller than female tennis players of same age range, which might be advantageous for males while playing. Insignificant differences between male and female players in the various lung variables measured indicated that the influence of height and gender differences could be minimized by proper training during puberty. A significantly higher PIF in male players indicated stronger and more powerful inspiratory muscle activity compared with female tennis players.
    Źródło:
    Medical Science Pulse; 2018, 12, 2
    2544-1558
    2544-1620
    Pojawia się w:
    Medical Science Pulse
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Behaviour and Electronic Structure of the R$\text{}_{2}$PdSi$\text{}_{3}$ (R = Ce, Nd, Tb-Er) Compounds
    Autorzy:
    Szytuła, A.
    Hofmann, M.
    Penc, B.
    Ślaski, M.
    Majumdar, Subham
    Sampathkumaran, E. V.
    Zygmunt, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013678.pdf
    Data publikacji:
    2000-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.-b
    75.30.Cr
    75.30.Kz
    79.60.-i
    Opis:
    The magnetic properties including the magnetic structure were determined by magnetometric and neutron diffraction measurements of the polycrystalline samples of R$\text{}_{2}$ PdSi$\text{}_{3}$ (R = Ce, Nd, Tb-Er). In Ce$\text{}_{2}$PdSi$\text{}_{3}$ the Ce moments order below 2.5 K. The Nd magnetic moments in Nd$\text{}_{2}$PdSi$\text{}_{3}$ exhibit ferromagnetic ordering below 17 K. In Tb$\text{}_{2}$PdSi$\text{}_{3}$, a complex situation is observed: in the temperature range from 1.5 K to (T$\text{}_{N}$=25 K), there is a coexistence of a ferromagnetic spiral (about 75% of the magnetic moment) and a spin-glass (about 25%). For the Dy, Ho, and Er compounds, below T$\text{}_{N}$ (7.5, 8, and 7 K respectively), sinusoidally modulated structures are observed. The valence band and the core level photoemissions of 4d of rare-earth metal, 3d Pd, 2s and 2p Si were investigated by X-ray photoemission spectroscopy measurements.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 5; 823-826
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evidence for the invalidity of the Wingate test for the assessment of peak power, power decrement and muscular fatigue
    Autorzy:
    Robergs, Robert A
    Kennedy, David
    Gibson, Ann L.
    Zuhl, Micah
    Hsu, Hung-Sheng
    Beam, Jason
    Salgado, Roy M.
    White, Ailish C.
    Majumdar, Aditi
    Lawson, Steve
    Estrada, Edson
    Sierra, Gustavo
    Powiązania:
    https://bibliotekanauki.pl/articles/1054919.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    cadence
    ergometry
    fatigue
    force
    motor unit recruitment
    Opis:
    We hypothesized that the protocol-induced initial cadence of the WAnT is too high to allow high muscle force production and peak power generation. Twenty endurance, strength or power trained subjects (9 male, 11 female) completed two 30 s maximal exertion stationary cycle ergometer tests involving the traditional peak cadence start (TRAD) vs. a stationary start (STAT). Inertia corrected mechanical power, cadence, EMG from the vastus lateralis, and applied force to the pedals were measured continuously throughout both tests. Peak power was higher during TRAD; 11.32 ±1.41 vs. 10.40 ±1.35 Watts/kg (p < 0.0001), as was peak cadence; 171.4 ±16.3 vs. 120.9 ±15.1 rev/min (p < 0.0001). However, during TRAD EMG root mean squared (rms) increased continuously throughout the test, force applied to the pedals increased from 1 to 3 s (0.73 ±0.27 vs. 0.90 ±0.39 N/kg; p = 0.02) and thereafter remained relatively stable. EMG mean frequency also increased from 1 to 3 s, but then decreased throughout the remainder of the test. During TRAD, mechanical power decreased near immediately despite increasing EMG rms, EMGmean frequency and force application to the pedals. The initial 10 s of data from the WAnT is invalid. We recommend that intense cycle ergometer testing should commence with a stationary start.
    Źródło:
    Central European Journal of Sport Sciences and Medicine; 2015, 10, 2; 63-78
    2300-9705
    2353-2807
    Pojawia się w:
    Central European Journal of Sport Sciences and Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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