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Wyszukujesz frazę "Sen, R. N." wg kryterium: Autor

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    Tytuł:
    Ergonomic Study on the Manual Component Insertion Lines for Occupational Health and Safety Improvements
    Autorzy:
    Sen, R. N.
    Yeow, P. H. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/90245.pdf
    Data publikacji:
    2003
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    ergonomic interventions
    occupational health and safety
    printed circuit assembly
    ergonomia
    warunki pracy
    bezpieczeństwo i higiena pracy
    praca przy taśmie montażowej
    Opis:
    The study aimed at reducing the occupational health and safety problems faced by the manual component insertion operators. Subjective and objective assessments, and direct observations were made in the printed circuit assembly factory. Simple and low-cost ergonomic interventions were implemented, that is, repairing chairs, reducing high workloads, assigning operators to a maximum of 2 workstations, confining machines that emitted bad smell and much noise, and providing finger work aids. The results of the interventions were reductions in operators’ work discomforts, that is, chair discomfort (by 90%), high work stress, and discomfort due to frequent change of their workstations. Their health hazards were also eliminated, that is, inhalation of toxic fumes, exposure to too much noise, and pain due to pressing sharp components.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2003, 9, 1; 57-74
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ergonomics Improvements of the Visual Inspection Process in a Printed Circuit Assembly Factory
    Autorzy:
    Yeow, P. H. P.
    Sen, R. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/90706.pdf
    Data publikacji:
    2004
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    occupational health and safety
    eye problems
    quality
    productivity
    cost savings
    ergonomia
    kontrola jakości materiału
    choroby oczu
    Opis:
    An ergonomics improvement study was conducted on the visual inspection process of a printed circuit assembly (PCA) factory. The process was studied through subjective assessment and direct observation. Three problems were identified: operators’ eye problems, insufficient time for inspection and ineffective visual inspection. These problems caused a huge yearly rejection cost of US $298,240, poor quality, customer dissatisfaction and poor occupational health and safety. Ergonomics interventions were made to rectify the problems: reduced usage of a magnifying glass, the use of less glaring inspection templates, inspection of only electrically non-tested components and introduction of a visual inspection sequence. The interventions produced savings in rejection cost, reduced operators’ eye strain, headaches and watery eyes, lowered the defect percentage at customers’ sites and increased the factory’s productivity and customer satisfaction.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2004, 10, 4; 369-385
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study of Vibrational Spectra of Fullerene $C_{70}$ and~$C_{80}$: An Algebraic Approach
    Autorzy:
    Sen, R.
    Kalyan, A.
    Subhra Paul, R.
    Sarkar, N.
    Bhattacharjee, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1493408.pdf
    Data publikacji:
    2011-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    03.65.Fd
    07.57.-c
    02.20.Sv
    78.30.Na
    Opis:
    Using the Lie algebraic method, the stretching vibrational energies of fullerenes $C_{70}$ and $C_{80}$ are calculated in the one-dimensional U(2) framework. By constructing the model Hamiltonian with the help of Casimir and Majorana invariant operators in this frame work, we calculated the local mode vibrational energy levels of the fullerenes $C_{70}$ and $C_{80}$.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 3; 407-411
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of intra-testicular injections of calcium chloride and 4-vinylcyclohexene 1,2 monoepoxide for chemical sterilization in guinea pigs
    Autorzy:
    Sen, C.C.
    Yumusak, N.
    Faundez, R.
    Temamogullari, F.
    Taskin, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/32206.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    This study was aimed at investigating the use of intra-testicular calcium chloride (CaCl₂) and 4-vinylcyclohexene 1,2-monoepoxide (VCM) injections as a side effect-free alternative method for the control of reproduction in guinea pigs. Fifty male guinea pigs were randomly assigned to five groups. In all groups, the chemical agents were injected into both testes in 1% lidocaine hydrochloride. While Groups I, II and III were administered with a single dose (0.25 mL) of sterile physiological saline, 15 mg/100 g CaCl₂, and 240 mg/kg VCM, respectively, Group IV and V received a daily dose of 15 mg/100 g CaCl₂, and 240 mg/kg VCM for 3 days, respectively. On day 90 post-administration, all animals were weighed and later decapitated under ether anaesthesia. Blood and tissue (testis, liver, hypophysis and adrenal gland) samples were taken. Sperm samples from the cauda epididymis were examined for spermatological parameters. Blood was used for hormone analyses and tissue samples were examined histopathologically (haematoxylin-eosin) and immunohistochemically (Tunel staining). The epididymal sperm count decreased in all treatment groups. Excluding 2 animals, Group V displayed azoospermia. When compared to the control group, Group V displayed the highest prolactin and lowest testosterone levels, and Group III showed the highest testosterone level. Histopathological examination revealed no intoxication finding. Chemical castration with VCM may be a good alternative to surgical castration as it enables mass sterilization without postoperative risks in guinea pig.
    Źródło:
    Polish Journal of Veterinary Sciences; 2017, 20, 2
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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