Results 51 to 60 of about 927,412 (249)

三节履带式机器人越障分析

open access: yesJixie chuandong, 2014
A robot of three-section crawler structure is designed,the main movement of the robot and the movement of the swing arm are synchronized through the sleeve shaft structure.It is conducive for robot functions to achieve.To analysis the obstacle ...
梁小波, 蒋刚, 吕国刚, 肖志锋
doaj  

Dynamic balance control in healthy young women during stair descent: a plantar pressure-based study

open access: yesFrontiers in Bioengineering and Biotechnology
BackgroundWomen are more likely to fall or even die when the ladder falls, which seriously affects the quality of daily life. It is necessary to better understand the plantar mechanism of the ladder falls and put forward reasonable suggestions ...
Ruiqin Wang   +14 more
doaj   +1 more source

Digital Approach for Measuring Tree Diameters in the Amazon Forest

open access: yesFloresta e Ambiente, 2019
Buttresses and other natural structures modify the shape of stems in Amazonia and change the diameter at breast height (DBH) measured at 1.3 m at ground level.
Carlos Henrique Souza Celes   +4 more
doaj   +1 more source

An assessment of stress and production rate of sucker rod heat pipes in oil well pumping system

open access: yesDeep Underground Science and Engineering, EarlyView.
The sucker rod pumping system is the preferred oil extraction technique. The concept about equipping the hollow vacuum space in solid sucker rods with heat pipe has been scrutinized in terms of stress and oil production evaluation. Abstract The implementation of the heat pipe concept in sucker rods for oil pumping systems negates the requirement for an
R. S. Anand   +5 more
wiley   +1 more source

Ilizarov External Fixator for Burst Fracture of the Lumbar Spine: A Case Report

open access: yesJournal of Orthopaedic Surgery, 2007
A 50-year-old man presented with severe back pain and tenderness throughout the lumbar area after falling from a ladder. He had an unstable type-B burst fracture, with a spinal canal narrowing of 36% and an anterior height loss of 65%.
H Matsubara   +5 more
doaj   +1 more source

A note on summability of ladder heights and the distributions of ladder epochs for random walks

open access: yesStochastic Processes and their Applications, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

Sonoma State History Journal: Opposing Forces Vol. 27

open access: yes, 2023
The Sonoma State History Journal is the history department's student academic journal, produced by Sonoma State students since 1995. The journal provides a one-of-a-kind professional development opportunity for graduate and undergraduate students in the ...
Jared Height
core  

Taller, more popular? Height influences peer selection in preschoolers

open access: yes, 2022
We design two studies to assess the effect of height on peer selection in preschoolers. In the first study, a total of 120 preschoolers participates (aged 5-6, half male and half female), we try to test our hypothesis by correlation analysis between the ...
Height and peer relationships
core   +1 more source

Electronic Structure Modulation in Dopant‐Controlled Single‐Atom Graphene Catalysts for Efficient Hydrogen Evolution: A Machine Learning and First‐Principles Study

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
First‐principles DFT calculations and machine learning analysis show that heteroatom doping of graphene (G) significantly enhances the stabilization of transition‐metal single atoms by strengthening metal–support interactions and increasing charge transfer. N‐doped G exhibits higher adsorption energies, lower d‐band centers, and shorter TM–G bonds than
Sajjad Ali   +3 more
wiley   +1 more source

Bridging Policy Gaps in Transition Times: How Local Actors Navigate Low Policy Coherence for Advancing a Circular Built Environment

open access: yesEnvironmental Policy and Governance, EarlyView.
ABSTRACT The construction sector is a major contributor to the climate crisis, accounting for over one‐third of global energy‐related CO2 emissions. In response, the European Commission identified the circular economy as a means of achieving green growth and prioritized the construction sector in its Circular Economy Action Plan.
A. (Angeline) Chartier   +1 more
wiley   +1 more source

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