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    Wyświetlanie 1-6 z 6
    Tytuł:
    Effects of Hand Posture, Breathing Type, Arm Posture and Body Posture on Hand Errors
    Autorzy:
    Lee, T. H.
    Cheng, T. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/90970.pdf
    Data publikacji:
    2012
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    aiming
    fine manipulation
    hand tremor
    pointing
    Opis:
    This study consisted of 2 experiments. Experiment 1 examined the effects of hand posture, arm posture and body posture on hand error, while experiment 2 examined the effects of hand posture, breathing type and body posture on hand error. This study showed that more hand errors occurred in the nondominant hand, extended arm, normal breathing and standing compared with errors in the dominant hand, flexed arm, inspire–hold and sitting, respectively. This study advised people to use their dominant hand, flex their arm, inspire and hold the breath and support their body while performing fine manipulation tasks. Finally, hand error varied dramatically across the participants, indicating the need to screen individuals for fine manual manipulation tasks.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2012, 18, 3; 393-398
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Asymmetric Lifting Capabilities for Different Container Dimensions
    Autorzy:
    Lee, T. H.
    Cheng, T. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/91162.pdf
    Data publikacji:
    2011
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    lifting capacity
    asymmetric lifting
    container
    Opis:
    This study recruited 14 young male participants to examine human 4-h maximum acceptable weight of lifting (MAWL) and maximum weight of lifting (MWL) for different modes of asymmetric lifting and containers. The results showed that asymmetric lifting with trunk rotation decreased MAWL and MWL by 9.1 and 17.3%, respectively, and asymmetric lifting with body turn decreased MAWL and MWL by 6.1%, when compared with the symmetric lifting. The decreasing effects of container width and MAWL and MWL were greater than those of container length. Participants selected MAWL of ~33–37% of their MWL capability.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2011, 17, 2; 187-193
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tunnelling of Direct and Indirect Excitons in Slightly Asymmetric Double Quantum Wells
    Autorzy:
    Mazurenko, D. A.
    Akimov, A. V.
    Moskalenko, E. S.
    Zhmodikov, A. L.
    Kaplyanskii, A. A.
    Challis, L. J.
    Cheng, T. S.
    Foxon, C. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1952066.pdf
    Data publikacji:
    1996-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.20.Dx
    63.20.Kr
    Opis:
    We report the first studies of luminescence spectra from asymmetric double quantum wells of GaAs with widths around 100 Å differing by only one (2.8 Å) or two monolayers. Studies of the position and intensity of the direct and indirect exciton lines suggest the existence of acoustic phonon-assisted tunnelling between exciton states separated by a few meV. At temperatures 10-20 K the electron tunnelling process is fast enough to maintain thermal equilibrium between these direct and indirect excitons which are connected with holes in the same quantum well.
    Źródło:
    Acta Physica Polonica A; 1996, 90, 5; 895-898
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Batch scheduling of deteriorating products
    Autorzy:
    Barketau, M. S.
    Cheng, T. C. E.
    Kovalyov, M. Y.
    Ng, C. T. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/375908.pdf
    Data publikacji:
    2007
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    scheduling
    batching
    remanufacturing
    deterioration
    Opis:
    In this paper we consider the problem of scheduling N jobs on a single machine, where the jobs are processed in batches and the processing time of each job is a simple linear increasing function depending on job's waiting time, which is the time between the start of the processing of the batch to which the job belongs and the start of the processing of the job. Each batch starts from the setup time S. Jobs which are assigned to the batch are being prepared for the processing during time S0 < S. After this preparation they are ready to be processed one by one. The non-negative number bi is associated with job i. The processing time of the i-th job is equal to bi(si - (si(b) + S0)), where si(b) and si are the starting time of the b-th batch to which the i-th job belongs and the starting time of this job, respectively. The objective is to minimize the completion time of the last job. We show that the problem is NP-hard. After that we present an O(N) time algorithm solving the problem optimally for the case bi = b. We further present an O(N2) time approximation algorithm with a performance guarantee 2.
    Źródło:
    Decision Making in Manufacturing and Services; 2007, 1, 1-2; 25-34
    1896-8325
    2300-7087
    Pojawia się w:
    Decision Making in Manufacturing and Services
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Establishment of feline in-house reference intervals for hematologic and biochemical parameters and potential age-related differences
    Autorzy:
    Lin, T.L.
    Chung, S.H.
    Sung, C.H.
    Yeh, S.Y.
    Cheng, T.L.
    Chou, C.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087480.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    feline
    reference interval
    age
    transference study
    Źródło:
    Polish Journal of Veterinary Sciences; 2019, 3; 599-608
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Revealing the core transcriptome modulating plant growth phase in Arabidopsis thalianaby RNA sequencingand coexpression analysis of the FHY3 FAR1 mutant
    Autorzy:
    Wang, W.
    Zhao, G.
    Wu, S.
    Hua, W.
    Zhang, T.
    Ruan, R.
    Cheng, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2130692.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    weekly transcriptome analysis
    plant development
    different expression genes
    (DEGs)
    immune response
    Opis:
    Plants must continually calibrate their growth in response to the environment throughout their whole life cycle. Revealing the regularity of plant early growth and development is of great significance to plant genetic modification. It was previously demonstrated that loss of two key light signaling transcription factors, FHY3 and FAR1, can cause a stunted stature in the plant adult stage, and numerous defense response genes can be continuously activated. In this study, we performed a time-course transcriptome analysis of the early 4 weeks of leaf samples from wild plants and their fhy3 and far1 transcription factors. By comparative transcriptome analysis, we found that during the early 4 weeks of plant growth, plants primarily promoted morphogenesis by organizing their microtubules in the second week. In the third week, plants began to trigger large- scale defense responses to resist various external stresses. In the fourth week, increased photosynthetic efficiency promoted rapid biomass accumulation. Weighted gene coexpression network analysis of FHY3 and FAR1 revealed that the two light signaling transcription factors may be originally involved in the regulation of genes during embryonic development, and in the later growth stage, they might regulate gene expression of some defense-related genes to balance plant growth and immunity. Remarkably, our yeast two-hybrid and bimolecular fluorescence complementation experiments showed that FAR1 interacts with the immune signaling factor EDS1. Taken together, this study demonstrates the major biological processes occurring during the early 4 weeks of plant growth. The light signaling transcription factors, FHY3 and FAR1, may integrate light signals with immune signals to widely regulate plant growth by directly interacting with EDS1.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2020, 89, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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