Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Jerry Johansson"'
Autor:
Reza Mortazavi, Jerry Johansson
Publikováno v:
International Journal of Forestry Research, Vol 2013 (2013)
Forestry residues as a renewable energy source are becoming increasingly competitive to fossil fuels. An important issue, however, is effective transportation solutions for this type of material. In this paper we describe and discuss several alternat
Externí odkaz:
https://doaj.org/article/7a0f5bdddf6642a6af72326877b92ed6
Autor:
Jerry Johansson
Publikováno v:
Silva Fennica, Vol 29, Iss 4 (1995)
Time studies and an ergonomic assessment were carried out in logging operations for three logging machines based on backhoe loader chassis. The time studies were completed with a follow-up study of one backhoe loader-based single-grip harvester. The
Externí odkaz:
https://doaj.org/article/3c1b3edb06194d3f8579a9bd348cfaf2
Autor:
Jerry Johansson, Tomas Gullberg
Publikováno v:
Biomass and Bioenergy. 30:1035-1042
A new method for integrated haulage of logging residues and soil scarification on a small-scale has been evaluated. The base machine was a farm tractor to which a grapple loader trailer was attached. The grapple loader had an attachment on the grappl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11308fb5fb8ea262fc4de44b78e4647b
https://doi.org/10.1016/j.biombioe.2005.12.011
https://doi.org/10.1016/j.biombioe.2005.12.011
Publikováno v:
Biomass and Bioenergy. 30:334-341
Bundling is a technology used to create a compressed and uniform handling unit from logging residues and other small size energy wood. The bundles may be handled and transported with the same equip ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57a120a38525148cd14a2ab368a81c0c
https://doi.org/10.1016/j.biombioe.2005.07.012
https://doi.org/10.1016/j.biombioe.2005.07.012
Publikováno v:
Biomass and Bioenergy. 24:389-400
Forests in urban areas are important for recreation. Social, aesthetic and recreational values are at least as important for forest management as economy and conventional forestry considerations. Systems with short, intensive harvesting phases and li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::899341866321f51f160aa92337f942fa
https://doi.org/10.1016/s0961-9534(02)00162-9
https://doi.org/10.1016/s0961-9534(02)00162-9
Autor:
Tomas Gullberg, Jerry Johansson
Publikováno v:
International Journal of Forest Engineering. 13:25-34
Harvesting very small trees one by one has always been comparatively unproductive. Multiple-tree handling creates opportunities to reduce time per tree and thereby make it profitable to harvest small trees instead of thinning to waste. Multiple tree-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ada16add5eaea6282a90de8e8d12ca8
https://doi.org/10.1080/14942119.2002.10702460
https://doi.org/10.1080/14942119.2002.10702460
Autor:
Jerry Johansson, Reza Mortazavi
Publikováno v:
International Journal of Forestry Research, Vol 2013 (2013)
Forestry residues as a renewable energy source are becoming increasingly competitive to fossil fuels. An important issue, however, is effective transportation solutions for this type of material. In this paper we describe and discuss several alternat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b411b9eff029d726be07f3acc4c3177
Autor:
Jerry Johansson
Publikováno v:
Journal of Forest Engineering. 7:7-17
Time and ergonomie studies were carried out for three excavator-based logging machines. A follow-up study of three excavator-based harvesters was conducted. The studies indicate that productivity was at the same level as that of Nordic specialized fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7902aa87b45aab154a1f675f0ac0b4b0
https://doi.org/10.1080/08435243.1995.10702674
https://doi.org/10.1080/08435243.1995.10702674
Autor:
Ulf Brandemark, Per E. M. Siegbahn, Jerry Johansson, Margareta R. A. Blomberg, Jan Wennerberg
Publikováno v:
The Journal of Chemical Physics. 88:4324-4333
CPF, MCPF, and multireference CCI calculations have been done on nickel carbonyl and its positive and negative ions. For obtaining an accurate value of the dissociation energy De of Ni–CO it is important to correlate all the CO valence electrons. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9207f6f39219ba450af8226616ce61e6
https://doi.org/10.1063/1.453792
https://doi.org/10.1063/1.453792