1. Recenzija začasnih normativov spravila lesa z zgibnimi traktorji z vitlom in prevoza lesa s tovornjakiBoštjan Košir, Matevž Triplat, Matevž Mihelič, Nike Krajnc, 2019, treatise, preliminary study, study Keywords: gozdovi, gozdarstvo, normativi, gozdna proizvodnja, gozdarska dela, spravilo lesa, prevoz lesa, zgibni traktorji, tovornjaki
Published in DiRROS: 08.04.2022; Views: 310; Downloads: 0 |
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9. Bucking of conifers using the woody H60 processor on the Syncrofalke 3 T cable yarder in Alpine foothillsJurij Marenče, Jernej Vadnjal, Boštjan Košir, 2009, original scientific article Abstract: The paper investigates mechanized bucking of conifers with a processor mounted on a cable crane system in the mountain conditions of the Alpine foothills. It analyses the measurement accuracy of various log types and explains its effect on the market price of these products. In the studied area, trees were felled by chain saw and the full-tree method was used to skid the felled trees to the cable yarder site using the Syncrofalke cable crane with a mounted Woody H 60 processor head. Further wood processing operations were carried out at the yarder site. Length measurement accuracy was illustrated through the frequency distribution and the modus of various lengths. The share of logs within a 5 cm interval - modus - (the best five) was 54.3%. The difference between the nominal log length and the minimum required length resulted in a loss of 4.38% of the total log value. Further more, it was established that the first quarter of the stem actually contained 64% of the total stem value. This means that the first cross-cut was responsible for nearly 50% of the total loss and the second crosscut pushed the figure to 80%. The present research only considered the losses incurred either by positive or negative cross-cut allowance or by insufficiently accurate length measurement of a certain log type.
Published in DiRROS: 12.07.2017; Views: 3713; Downloads: 1758
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10. GIS-based model of wood precurement from stump to small sawmills in the Alpine region - a case studyJanez Krč, Boštjan Košir, 2009, original scientific article Abstract: With wood logistics and forest operation modelling, we have connected a technologic chain of cutting, skidding and road wood transport operations. The goal of the paper is to present the possibilities of simulating forest operation activities including cost flow prediction. The case study regarding wood flow and forest operation cost modelling was conducted in four municipalities located in western Slovenia (bordering to Italy). Input data of forest inventory and basic forest data were used in order to predict the wood flow in the test area. We modelled the available cutting volumes with the capacities of local sinks - notably sawmills. Unbalanced hinterland areas of specific sinks that do not cover the local sink capacities were changed (reduced or enlarged) on account of the adjacent hinterland areas with surplus or shortage of wood volume. The hauling distances and wood volumes for covering the sawmillsć capacities of the adopted (balanced) hinterland areas were studied.
Published in DiRROS: 12.07.2017; Views: 3391; Downloads: 1656
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