Results 41 to 50 of about 190,410 (183)

Evaluation the skid trail effect on annual ring width fluctuations in Beech (Fagus orientalis Lipsky) and Alder (Alnus subcordata C. A. Mey.) trees (District Nav No. 1, Asalem forests, Guilan) [PDF]

تحقیقات جنگل و صنوبر ایران, 2016
Each skid trail construction affects the trees located on the road margins in various extents. The present study was conducted with the aim to assess the changes in annual ring widths of Beech and Alder trees compared to the control trees inside the Nav ...
Milad Zarei Golbaghi, Mehrdad Nikooy, Javad Torkaman, Leila Karamyian Omrani   +3 more
doaj   +1 more source

Assessing the relationship of slope and runoff volume on skid trails (Case study: Nav 3 district)

Journal of Forest Science, 2012
The effect of slope on runoff volume was evaluated on skid trails in the natural forest in the north of Iran. The objective of this study was to determine the relationship between runoff volume and slope in order to control runoff and skid trail ...
M. Akbarimehr, R. Naghdi
doaj   +1 more source

Ecological Restoration of Compacted Soil Following the Application of Different Leaf Litter Mulches on the Skid Trail over a Five-Year Period

Sustainability, 2018
Ground-based skidding operations performed with heavy machinery have drastic effects on forest soils, which normally culminate in an increased soil bulk density and removal of the litter layer.
M. Jourgholami, A. Nasirian, Eric R. Labelle   +2 more
semanticscholar   +1 more source

Investigating the performance of some improvement treatments in restoring soil physical properties of skid trails (Case Study: Darabkola Forest, Sari) [PDF]

مجله جنگل ایران, 2018
Logging operation by skidders can lead to soil compaction, rutting and erosion of skid trails. Therefore, in order to restore the soil physical properties of skid trails, it is necessary to perform improvement treatments.
Pejman Imani, Majid Lotfalian, Aidin Parsakhoo, Ramin Naghdi   +3 more
doaj  

Modeling the process of rut formation during sequential interaction of forwarder wheels with solid obstacles on a skid trail taking into account soil moisture

Forestry Engineering Journal
A mathematical model of rut formation during sequential interaction of forwarder wheel sets with solid obstacles (stumps, stones) on a skidding trail is presented, taking into account soil moisture.
Vladimir Shapiro, I. Grigor'ev, E. Sibiryatkin, E. Tihonov, P. Perfil'ev   +4 more
semanticscholar   +1 more source

Sliding Mode Control in Aerospace Applications: A Survey

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley   +1 more source

Assessment of the performance of a skid trail on a slope considering the reinforcing effect of a root-saturated soil layer under the interaction of the wheels of a forest machine

Forestry Engineering Journal
In many constituent entities of the Russian Federation, forest fund areas are located not only on flat terrain, but also on slopes of mountains, hills, and hilly ridge landforms.
Vladimir Shapiro, I. Grigor'ev, Ya. Ryzhov, E. Tikhonov, P. Perfil'ev   +4 more
semanticscholar   +1 more source

Using Airborne Laser Scanning and Sentinel‐2 to Understand Subcanopy Light Regimes and Understory Diversity of Vascular Plants in Temperate Mountain Forests

Remote Sensing in Ecology and Conservation, EarlyView.
This study demonstrates that not just Airborne Laser Scanning, but also Sentinel‐2 can effectively estimate absolute canopy cover and canopy cover heterogeneity ‐ structural metrics that determine the subcanopy light regime, found to be linked to the vascular plant species richness in the understory of temperate mountain forests.
Felix Wieland‐Glasmann, Cornelius Senf, Kristin H. Braziunas, Rupert Seidl, Peter Annighöfer   +4 more
wiley   +1 more source

Decision support system to find a skid trail network for extracting marked trees

, 2017
Parsakhoo A., Mostafa M., Shataee S., Lotfalian M. (2017): Decision support system to find a skid trail network for extracting marked trees. J. For. Sci., 63: 62–69.
A. Parsakhoo, M. Mostafa, S. Shataee, M. Lotfalian   +3 more
semanticscholar   +1 more source

A Family Affair: War, Agency and Female Epistolary Networks in Renaissance Italy

Gender &History, EarlyView.
ABSTRACT This article draws on the largely unexplored epistolary archive of dozens of women who were born or married into military families in northern Italy around the time of the first phase of the Italian Wars (1494–1530). Building on recent work on early modern agency, patriarchy, networks and emotional communities, the article reconstructs and ...
Stephen Bowd
wiley   +1 more source