Results 221 to 230 of about 273,162 (263)

Physiological changes during prolonged standing and walking considering age, gender and standing work experience

Ergonomics, 2020
Occupational standing is associated with musculoskeletal and venous disorders. The aim was to investigate whether lower leg oedema and muscle fatigue development differ between standing and walking and whether age, gender and standing work habituation are factors to consider.
Rudolf Wall, Gabriela Garcia, Thomas Läubli, Robert Seibt, Monika A. Rieger, Bernard Martin, Benjamin Steinhilber   +6 more
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Estimating Tree Ages in Uneven-Aged Hardwood Stands

Southern Journal of Applied Forestry, 1989
Abstract Two groups of upland hard-wood trees from the same general area were studied by 44 volunteer observers to determine the ability of the observers to visually estimate tree ages. The error of estimate for tree ages varied by the professional category of the observer, and all categoriesof observer improved with training.
openaire   +1 more source

Forest−stand survival in different age classes

2022
Sylwan 166 (7): 415 ...
Kanabus, Radosław, Miścicki, Stanisław   +1 more
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Prediction of stand attributes of even-aged teak stands using multilevel models

Forest Ecology and Management, 2006
Abstract Hierarchical models were utilized to derive localizable equations for predicting crop diameter, crop height and crop volume in the case of even-aged teak stands. The models considered both random and systematic variation in parameter values over different plantations and regions.
C. Sunanda, K. Jayaraman
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Financial Maturity for Even-Aged and All-Aged Stands

Forest Science, 1983
Abstract The Bentley and Teeguarden even-aged general present net worth model is further generalized to accommodate all-aged stands. The relationship to Chang's forest value, for all-aged stands, is described. Forest Sci. 29:833-836.
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Strategy to convert an even-aged stratified stand to an uneven-aged mixed species stand

2009
This thesis is the initial step of a long term study to evaluate and monitor a selection silviculture system applied to a 38.9 hectares private woodlot in the Golden moist-warm variant, of the Interior Cedar Hemlock (ICHmw1) zone. It establishes the selection silviculture parameters designed to convert an even-aged stratified mixed species stand ...
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Ageing with long-standing hearing impairment and deafness

International Journal of Rehabilitation Research, 2000
Until recently, ageing with a long-standing disability had not been a major consideration for governments around the world. Policy and planning for this substantial subgroup had not kept abreast with developments in regard to the growing numbers of older people in general. Consultations held in Australia provided information and recommendations for use
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Stand and tree dynamics in uneven-aged interior Douglas-fir stands

2009
The Interior Douglas-fir Biogeoclimatic Zone covers 4 million hectares in the southern interior of British Columbia. This zone is dominated by interior Douglas-fir forests which are valued for their timber, wildlife, range and recreational values. Interior Douglas-fir can be found growing naturally in uneven-aged structured stands; a structure that ...
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Size-Class Models for Even-Aged Stands

2012
Size-class models make use of information from inventories of trees by diameter classes avoiding the necessity of assuming a particular distribution for tree diameters. Tree populations can be divided into groups, commonly called cohorts, based on species, diameter, height or a combination of these and other characteristics.
Harold E. Burkhart, Margarida Tomé
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Dynamics of an Uneven-Aged Forest Stand

Forest Science, 1972
Abstract The components of net growth for number of trees and basal area are described as a system of first-order, ordinary differential equations for an uneven-aged forest stand. Data from a 6-year period are utilized to estimate coefficients for the governing equations. Thirteen successive years of historical data are subsequently used
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