Results 21 to 30 of about 588 (133)

Determination of correction coefficient of average skidding distance according to the existing road network in Alikia Soltan forest of Iran

Journal of Forest Science, 2013
One of the factors in planning forest roads is average skidding distance which is calculated in projects from the map, according to forest road density, however it has a low accuracy.
M. Rezaei, F. Shafizade, M.A. Rezaei
doaj   +1 more source

A General Workflow for Tangential Flow Filtration Perfusion Scale‐Up

Biotechnology and Bioengineering, EarlyView.
ABSTRACT Tangential flow filtration (TFF) perfusion using hollow‐fiber modules offers substantial advantages over other mammalian cell retention technologies. Recently, increased awareness of Starling flow has helped to enhance filtration performance to similar, or even higher levels compared to alternative technologies.
Patrick Romann, Ken Lee, Venkatesh Natarajan, Daniel Ley, Claes Nymand Nilsson, David Garcia‐Munzer, Dominik Schieman, Mahbod Hajighasemi, Alex Zaytsev, Jason Friedman, Loic Chappuis, Tobias Habicher, Colin Jaques, Alex Cohen, Matthew Gagnon, Edward Chan, Daniel J. Karst, Philip Giller, Antony Sibilia, Andrew L. Zydney, Thomas K. Villiger   +20 more
wiley   +1 more source

High‐throughput development and scale‐up of recombinant adeno‐associated virus 5 anion‐exchange chromatography for high‐purity capsid separation

Biotechnology Progress, EarlyView.
High‐throughput anion‐exchange chromatography process development enables scalable purification of high‐purity recombinant adeno‐associated virus capsids. Abstract Recombinant adeno‐associated virus (rAAV) production commonly yields a high proportion of empty and partially filled capsids, necessitating downstream purification to enrich full capsids ...
Kevin Vera, Ivan Gajic, Praveen Kusumanchi, Angela Andaluz, Gabrielle Dela Pena, Clifford A. Froelich, Elizabeth Higgins, Jennifer Johnston, Seyed Pouria Motevalian   +8 more
wiley   +1 more source

Time study and skidding capacity of the wheeled skidder Timberjack 450C in Caspian forests

Journal of Forest Science, 2008
This study was carried out in a steep and difficult terrain. Trees were logged downhill to the landing by a wheeled skidder Timberjack 450C. Selection cutting was performed on a 66-hectare tract with an average slope of 30%.
F. K. Behjou, B. Majnounian, M. Namiranian, J. Dvořák   +3 more
doaj   +1 more source

Triboelectric nanogenerators for vehicle intelligent cockpits

FlexMat, EarlyView.
Converting mechanical stimuli from drivers and vehicle motion into electrical signals, triboelectric nanogenerators provide promising interfaces toward passive, flexible, distributed and intelligent sensing for next‐generation automotive cockpits to support three core functional dimensions: driver state monitoring, vehicle state monitoring, and human ...
Haiqiu Tan, Shiquan Lü, Xiangwei Meng, Huiying Zhang, Wenxing Zhang, Dongxian Sun, Xiao Lu, Lei Wang, Haodong Zhang, William W. Yu   +9 more
wiley   +1 more source

Comparative Effectiveness of Different Mulch Types and Application Rates for Reducing Runoff and Sediment Yield on Forest Skid Trails

Land Degradation &Development, EarlyView.
ABSTRACT Rehabilitation of skid trails following timber harvesting is critical for preserving forest soil integrity, particularly within ecologically sensitive ecosystems such as the Hyrcanian forests of northern Iran, a UNESCO World Heritage Site. Although mulching is widely recommended for erosion control, field evidence comparing different locally ...
Masoumeh Ahmadi, Meghdad Jourgholami, Baris Majnounian, Shahram Khalighi Sigaroodi, Francesco Latterini, Rachele Venanzi, Angela Lo Monaco, Rodolfo Picchio   +7 more
wiley   +1 more source

Combined Effects of Skidding Direction, Skid Trail Slope and Traffic Frequency on Soil Disturbance in North Mountainous Forest of Iran

Croatian Journal of Forest Engineering, 2017
Harvest traffic with heavy equipment causes damage to forest soils. Whereas increased soil damage has been reported with increasing harvest equipment traffic and on increasing slope gradients, it is unclear how much soil damage is caused by different ...
Ramin Naghdi, Petros A. Tsioras, Ulrik Ilstedt, Ali Salehi, Mehrdad Nikooy, Ahmad Solgi   +5 more
doaj  

Productivity and cost of farm tractor skidding

Journal of Forest Science, 2012
In this study, productivity rate and operation cost of farm tractor were evaluated in a mountainous natural forest. Data for the study came from a detailed time study in the Research and Educational Forest of Tarbiat Modares University (REFTMU) and was ...
N. Gilanipoor, A. Najafi, S.M. Heshmat Alvaezin   +2 more
doaj   +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

Impact of combined alignments and adverse weather conditions on vehicle skidding

Journal of Traffic and Transportation Engineering (English ed. Online), 2023
Roadways in Wyoming are characterized by challenging horizontal profiles, vertical profiles, a combination of the two and adverse weather conditions, all of which affect vehicle stability.
Anas Alrejjal, Khaled Ksaibati
doaj   +1 more source