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    Wyświetlanie 1-4 z 4
    Tytuł:
    Szlaki zrywkowe w proekologicznym gospodarstwie lesnym. Czesc I - szlaki a przygotowanie stanowisk roboczych
    Autorzy:
    Sosnowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/824411.pdf
    Data publikacji:
    2002
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    szlaki zrywkowe
    gospodarstwa lesne
    gospodarstwa ekologiczne
    lesnictwo
    stanowiska pracy
    Źródło:
    Sylwan; 2002, 146, 08; 73-80
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Podobieństwo stanowisk pracy w cięciach sanitarnych
    Similarity of the workstations involved in sanitation felling
    Autorzy:
    Leszczyński, K.
    Jałowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1008923.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    ergonomia
    prace lesne
    ciecia sanitarne
    stanowiska pracy
    ryzyko zawodowe
    podobienstwo
    forest utilisation
    ergonomy
    multidimensional scaling
    Opis:
    The aim of the study was to assess the level of occupational risk on the basis of allowable maximum concentration and intensity of factors occurring in the material work environment, and to determine the relationship between the workstation and the variables describing it by drawing similarity maps using multidimensional scaling (MDS) methods. The scope of work involved four manual−mechanical wood harvesting stations characterised by nine ergonomic−technological indicators.
    Źródło:
    Sylwan; 2011, 155, 07; 437-445
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie metod określania wydatku energetycznego na przykładzie leśnictwa
    Comparing methods of energy expenditure estimation using forestry as an example
    Autorzy:
    Grzywiński, W.
    Mederski, P.S.
    Bembenek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1313061.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    prace lesne
    stanowiska pracy
    czynnosci robocze
    wydatek energetyczny
    metody obliczen
    metody szacunkowe
    pomiary
    analiza porownawcza
    energy expenditure
    comparison of methods
    forestry
    Opis:
    In this paper the values of energy expenditure obtained with estimative methods (tables of energy expenditure, Lehmann's method) were compared to the data obtained with a method based on pulmonary ventilation measurements. Thereby, the usefulness of estimative methods for determining energy expenditure on work stations in forestry was tested. We compared energy expenditures for 30 forestry work stations within which 59 different activities were distinguished. For each activity the energy expenditure was determined utilizing the three following methods: pulmonary ventilation measurement, tables of energy expenditure and Lehmann's method. The percentage error in energy expenditure for particular activities determined with tables ranged from -44.47% to 42.31%. The highest representation of error value (52.8%) varied between -19.9% and 5.0%. The error in energy expenditure estimation determined with Lehmann's method is characterized by a smaller variability ranging from -31.35% to 34.13%. The highest density of error values was found in the range from -4.9% to 10.0%, which comprises 44.1% of the results. To conclude, the use of tables resulted in an underestimation of the energy expenditure value for 64.1% of activities, whereas the use of Lehmann's method resulted in an underestimation in 49.1% of the cases.
    Źródło:
    Leśne Prace Badawcze; 2014, 75, 4; 417-421
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Obciążenie fizyczne na stanowiskach leśniczego i podleśniczego
    Physiological workload at forester and deputy forester workstations
    Autorzy:
    Grzywiński, W.
    Jelonek, T.
    Tomczak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/979590.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Panstwowe Gospodarstwo Lesne Lasy Panstwowe
    stanowiska pracy
    stanowisko lesniczego
    stanowisko podlesniczego
    obciazenia fizyczne
    czestosc skurczow serca
    wydatek energetyczny
    heart rate
    energy expenditure
    work heaviness
    forester
    deputy forester
    Opis:
    The paper presents the study of physiological workload at forester and deputy forester workstations in 62 forest districts located all over Poland. The research was carried out on the sample group of 185 foresters and 167 deputy foresters in the course of one week (Monday−Friday) in each season of the year. The sample group was selected based on the unit’s management difficulty degree and personal job seniority. The measurement of heart rate (HR) was used to assess workers’ physiological workload. HR telemetric measurement was carried out by the means of wireless physical activity monitors ActiGraph GT9X and Polar WearLink H7. Every heart beat was recorded (beat−to−beat). ActiLife v. 6.11 software was used for data anasysis. On the basis of mean HR the value of minute net energy expenditure (NEE) was calculated. The overall mean HR amounted to 85.0 bpm for foresters, and 93.1 bpm for deputy foresters. These values classify work of forester as light, whereas that of deputy forester in the category of moderate work. The similar level of mean HR values was recorded in particular unit’s management difficulty degree and job seniority groups, especially at forester’s position. A higher diversity of HR was noticed in seasons. The mean HR values of foresters and deputy foresters in particular unit’s management difficulty degree and job seniority classes were significantly different (p<0.05), whereas there were not statistically significant differences in HR for these factors at the same workstation. The overall mean minute NEE at forester’s position amounted to 8.2 kJ/min and 11.5 kJ/min at deputy forester’s position. The minute NEE as a derivative of HR differed slightly in unit’s management difficulty degree and job seniority groups. Higher differences of NEE were observed in particular seasons. On the basis of the minute NEE, the energy cost of workshift (8h) was calculated. At the forester workstation it amounted to 4000 kJ (955 kcal) and at deputy forester’s to 5500 kJ (1313 kcal), on average. Energy expenditure classify both workstations in the category of moderate work. At forester’s workstation the highest NEE on the workday was recorded in winter (4560 kJ) and the lowest in summer (3744 kJ), while at deputy forester’s the highest NEE was noticed in spring (5856 kJ) and the lowest in winter (4992 kJ).
    Źródło:
    Sylwan; 2019, 163, 10; 811-819
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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