Results 51 to 60 of about 566 (162)
Nanophotonics, Volume 15, Issue 14, 27 July 2026.Integrated optical phased arrays are emerging as scalable engines for solid‐state beam steering and programmable wavefront control. This Review maps the field from beam‐steering principles and core building blocks to material platforms, system‐level bottlenecks, and application frontiers, highlighting how heterogeneous integration, aperiodic ...
Jingwei Li +7 more
wiley +1 more source
Studies on Tanzanian forest work.
Silva Fennica, 1987 Four teams of two workers were time-studied in clearcutting of a cypress plantation and three teams in sulky skidding. The heart rate was recorded every 30 s. The average heartrate in timber cutting was 117.5 ± 13.4 P/min, and it was mainly dependent on
Saarilahti, M. +5 more
doaj +1 more source
Journal of Forest Science, 2014 The aim of the study was to propose and verify a model which, based on multi-criteria evaluation of selected input data, determines the category in terms of the environmentally friendly use of individual skidding technologies for each stand.
M. Synek, M. Klimánek
doaj +1 more source
Croatian Journal of Forest Engineering, 2017 This paper presents the results of the study on work time and productivity of the John Deere 548G-III grapple skidder operating in pine stands on flat terrain.
Arkadiusz Stańczykiewicz +2 more
doaj
Journal of Forest Science, 2012 This paper presents research results of the performance of HSM-904 grapple skidder using a full tree harvesting method in a non-native aspen Populus deltoides plantation in even terrain conditions in Shafaroud, Northern Iran.
R. Mousavi +3 more
doaj +1 more source
Optimal Forest Road Density Based on Skidding and Road Construction Costs in Iranian Caspian Forests
Caspian Journal of Environmental Sciences, 2009 Information on the productivity, costs and applications of the logging system is a key component in the evaluation of management plans for the rehabilitation and utilization of Caspian forests.
Mohammadi Limaei, S., Naghdi, R.
doaj
Integrating Animal and Mechanical Operations in Protected Areas
Croatian Journal of Forest Engineering, 2011 The authors tested two alternative treatments for small wood extraction in protected conservation areas, respectively based on direct skidding by small crawler tractors and integrated horse bunching and crawler tractor skidding.
Raffaele Spinelli, Natascia Magagnotti
doaj
Croatian Journal of Forest Engineering, 2009 In Turkey ground base skidding method is frequently used to extract log material. Physical damages occurring on the skidded log during ground based skidding cause quality and quantity loss of the log.
H. Hulusi Acar, Saliha Unver
doaj
Productivity and Costs of Mechanized Skidding operations at Sao Hill Forest Plantation, Tanzania
Forest Science and TechnologyDue to global advancement of technology in forest operations, utilization of advanced machineries such as grapple skidder (GS) in timber harvesting has been increasing in the last decades. However, in order to understand their contribution in sustainable
Gilberth Prosper Temba +2 more
doaj +1 more source
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2015 The study describes a new system of technological typification in forestry based on multicriteria evaluation of environmentally friendly use of common skidding technologies.
Michal Synek, Martin Klimánek
doaj +1 more source