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Wyszukujesz frazę "Sadhu, N." wg kryterium: Autor


Wyświetlanie 1-4 z 4
Tytuł:
A Comparative Assessment of the Impact of Different Occupations on Workers’ Static Musculoskeletal Fitness
Autorzy:
Chandra, A. M.
Ghosh, S.
Iqbal, R.
Sadhu, N.
Powiązania:
https://bibliotekanauki.pl/articles/90250.pdf
Data publikacji:
2007
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
occupations
repetitive movements
static muscular forces
musculoskeletal disorders
dynamometry
Opis:
An ergonomic assessment of the involvement of static muscular forces like back strength, grip strength and pinch strength in different occupations was made. A study was conducted on 45 normal adult males (15 subjects per group) which included video display terminal (VDT) operators, industrial workers and safety inspectors. Their maximum back strength, handgrip strength and pinch strength were measured with dynamometers. The observed values of back strength were significantly lower in VDT operators while significantly higher in safety inspectors and moderate in industrial workers. The values of grip strength and pinch strength of all sample groups were more or less similar. The findings clearly indicate that static muscular strength varies significantly in different occupations. Heavy static muscular load might lead to an accumulation of metabolic waste and toxins on the back resulting in lower back strength in VDT operators and industrial workers.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2007, 13, 3; 271-278
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Exercise and Heat-Load on Simple Reaction Time of University Students
Autorzy:
Chandra, A. M.
Ghosh, S.
Barman, S.
Iqbal, R.
Sadhu, N.
Powiązania:
https://bibliotekanauki.pl/articles/89834.pdf
Data publikacji:
2010
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
reaction time
exercise
heat stress
cognitive performance
Opis:
Visual and auditory simple reaction times for both right and left hands of young university male students were recorded with a simple reaction timer, before and after an exercise schedule without and with elevated temperatures in a climatic chamber. The results indicated a decrease in both visual and auditory reaction times after the exercise, but a marked increase in them was noticed when exercise was performed at elevated temperatures. The difference in reaction times in preferred and nonpreferred hands was negligible at rest, i.e., without any exercise and elevated temperature. However, the difference was significant when exercise was performed at elevated temperatures. Visual reaction time was longer than auditory reaction time in all conditions. The results suggest that in hot industries, increased temperature has a specific rather than general effect on cognitive processes, perception and attentiveness, leading to increased chances of human errors, fatal accidents and loss of productivity.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2010, 16, 4; 497-505
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel circuit topology of modified switched boost hybrid resonant inverter fitted induction heating equipment
Autorzy:
Bhattacharya, A.
Sit, K.
Sadhu, P. K.
Pal, N.
Powiązania:
https://bibliotekanauki.pl/articles/140770.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
modified switched boost
high frequency
hybrid resonant inverter
induction heating
controllability
VSI and PSIM
Opis:
A novel circuit topology of modified switched boost high frequency hybrid resonant inverter fitted induction heating equipment is presented in this paper for efficient induction heating. Recently, induction heating technique is becoming very popular for both domestic and industrial purposes because of its high energy efficiency and controllability. Generally in induction heating, a high frequency alternating magnetic field is required to induce the eddy currents in the work piece. High frequency resonant inverters are incorporated in induction heating equipment which produce a high frequency alternating magnetic field surrounding the coil. Previously this high frequency alternating magnetic field was produced by voltage source inverters. But VSIs have several demerits. So, in this paper, a new scheme of modified switched boost high frequency hybrid resonant inverter fitted induction heating equipment has been depicted which enhances the energy efficiency and controllability and the same is validated by PSIM.
Źródło:
Archives of Electrical Engineering; 2016, 65, 4; 815-826
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new circuit topology using Z-source resonant inverter for high power contactless power transfer applications
Autorzy:
Ghosh, P. C.
Sadhu, P. K.
Ghosh, A.
Pal, N.
Powiązania:
https://bibliotekanauki.pl/articles/141006.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
contactless power transfer
mutual inductance
magnetic coupling coefficient
Z-source
resonant inverter
Opis:
In this study, a new circuit topology using a Z-source resonant inverter (ZSRI) for high power applications in large-air-gap contactless power transfer (CPT) systems, has been investigated. The main shortcoming of a large-air-gap CPT system is the poor power transfer efficiency due to low magnetic coupling. In order to minimize this shortcoming and to improve the overall performance of the system by boosting the power transfer capability, in this paper a CPT system with the newly developed circuit topology using high frequency Z-source resonant inverter has been proposed. Using the newly developed circuit topology for the CPT system, it has been observed that the overall performance of the system has been improved to a reasonable level with a purely sinusoidal resonant current flowing through the primary side. Therefore, no harmonics will be injected into the source. The proposed CPT system with an air gap of 16 cm and a misalignment of 3 cm has been simulated using the Maxwell finite element tool and Simplorer circuit simulation software for an output power of 2 kW.
Źródło:
Archives of Electrical Engineering; 2017, 66, 4; 843-854
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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