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    Wyświetlanie 1-4 z 4
    Tytuł:
    Wpływ częstości zbioru żywicy na wydajność pracy przy żywicowaniu gospodarczym metodą klasyczną
    Vlijanie chastoty sbora smoly na proizvoditel'nost' truda pri provedenii khozjajjstvennojj podsochki klassicheskim metodom
    The effect of the frequency of resin collection upon the efficiency of work during commercial tapping with the aid of classic method
    Autorzy:
    Kaminski, E.
    Glowacki, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/813894.pdf
    Data publikacji:
    1971
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    uboczne uzytkowanie lasu
    zywicowanie
    czestosc zbioru zywicy
    wydajnosc pracy
    Źródło:
    Sylwan; 1971, 115, 03
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie monitora pracy serca do oceny efektywnego wydatku energetycznego w ręczno-maszynowych technologiach pozyskiwania drewna
    Use of heart rate monitor in assessing the net energy expenditure during motor-manual cutting
    Autorzy:
    Leszczyński, K.
    Stańczykiewicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/990022.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    pozyskiwanie drewna
    robotnicy lesni
    operatorzy pilarek spalinowych
    fizjologia pracy
    tempo metabolizmu
    wydatek energetyczny
    czestosc skurczow serca
    energy expenditure
    chainsaw operator
    timber harvesting
    metabolism rate
    late thinning
    Opis:
    Energy expenditure during labour constitutes one of the criteria used for assessing the laboriousness of timber harvesting. The major objective of this study was to point out the possibilities of defining work net energy expenditure (NEE) as related to the frequency of heart rate in the field exercise tests by changing posture and varied external work load. The scope of the study was restricted to the work of chainsaw operators performing hard physical labour during late thinning of fir and spruce on the middle mountain (Beskid Makowski, Beskid Śląski). The research involved dynamic work with elements of static load for which the NEE was investigated by means of heart rate as well as respiratory – indirect estimation of oxygen consumption as results of airflow measurement. The advantage of both methods is simplicity of application, the lack of necessity to perform additional analyses as time study and expected medium error. The conducted calculations pointed out to a strong linear correlation, where correlative coefficient was equal to 0.67. The conducted model analysis (including, among others: the normality, autocorrelation of residuals and identification of influential values) has confirmed its validity at the 10% statistical error. The obtained regression coefficient indicates a larger increase in value as compared to the available formulas with acceptable in practice standard error of prediction on 6.05 kJ/min level.
    Źródło:
    Sylwan; 2014, 158, 02; 124-131
    0039-7660
    Pojawia się w:
    Sylwan
    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
    Tytuł:
    Foliofagi tworzące galasy na Fagus sylvatica L.
    Foliophages inducing plant-galls in Fagus sylvatica L.
    Autorzy:
    Wrzesińska, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1005769.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    buk zwyczajny
    Fagus sylvatica
    szkodniki roslin
    owady
    foliofagi
    hartigiolowka bukowa
    Hartigiola annulipes
    garnusznica bukowa
    Mikiola fagi
    struktura dominacji
    liczebnosc
    czestosc wystepowania
    fagus sylvatica
    mikiola fagi
    hartigiola annulipes
    plant−galls
    cecidomyiidae
    Opis:
    Observations on the occurrence of foliophages inducing plant−galls in European beech Fagus sylvatica were performed over 2010−2011, at four forest stands located in Bydgoszcz. Analyses of the material collected demonstrated the presence of two Diptera species representing Cecidomyiidae family: Hartigiola annulipes Hartig. and Mikiola fagi Hartig. During two vegetation seasons there were collected 15,092 plant−galls. Most of them were reported in 2010 (67.57%) and much fewer – in 2011 (32.43%).
    Źródło:
    Sylwan; 2012, 156, 11; 843-847
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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