Results 61 to 70 of about 140,658 (303)

Temperature and Farm Labor in Nigeria

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT We estimate the impact of temperature shocks on the composition of farm labor in rural Nigeria using a nationally representative household panel survey. Leveraging plausibly exogenous year‐to‐year variation in growing season temperatures, we find that warmer temperatures significantly alter farm labor composition, prompting a substantial shift
Andu Berha
wiley   +1 more source

Direct visualization of Euler’s belt theory by Brillouin optical correlation-domain reflectometry

Nihon Kikai Gakkai ronbunshu
Rope-based mechanisms are widely utilized in elevators, cranes, and ship moorings. At the root of these are often Euler’s belt theory, in which a rope is wound around a fixed pulley and frictional force is said to increase exponentially with the winding ...
Rei SUGIHARA, Kohei NODA, Shinya SADACHIKA, Atsushi TAKATA, Kentaro NAKAMURA, Yosuke MIZUNO, Sze Yun SET, Shinji YAMASHITA, Gen ENDO   +8 more
doaj   +1 more source

Tensioning of a belt around a drum using membrane element [PDF]

An application of the membrane element to the problem of the tensioning of a conveyer belt which wraps around a drum is presented. Two cases were investigated: (1) belt tension increase due to drum edge wear; and (2) material trapped between the drum and
Chen, C. H. S.
core   +1 more source

Mesoscopic lattice Boltzmann modeling of soft-glassy systems: theory and simulations

, 2009
A multi-component lattice Boltzmann model recently introduced (R. Benzi et al. Phys. Rev. Lett 102, 026002 (2009)) to describe some dynamical behaviors of soft-flowing materials is theoretically analyzed.
Cundall, M. Bernaschi, M. Sbragaglia, Midi, R. Benzi, S. Chibbaro, S. Succi, Verrocchio   +7 more
core   +1 more source

Screw‐Based Pill for Intelligent Robotic Extraction of Viscous Fluids in Medical Applications

Advanced Intelligent Systems, EarlyView.
Screw‐based pill for intelligent robotic extraction (S‐PIRE) is a magnetically actuated smart capsule with a motorized screw, 3‐axis sensor, and Bluetooth control for site‐specific and minimally invasive remote sampling of viscous fluids, overcoming passive diffusion limitations.
Prima Dewi Sinawang, Victor Garcia‐Gradilla, Fernando Soto, Demir Akin, Margaret Braunreuther, Gerald G. Fuller, Utkan Demirci   +6 more
wiley   +1 more source

Driving control strategy of intermediate unloading long distance belt conveyor

Gong-kuang zidonghua, 2017
In view of problems such as roller skidding, belt jumping, belt loosening, material stacking, unbalanced power loads in the middle and head motors, which may occur when driving control of the intermediate unloading belt conveyor is controlled improperly,
HUANG Zhonghe, WANG Shibo
doaj   +1 more source

Curved Graphene Nanoribbons: Structure and Dynamics of Carbon Nanobelts

, 2010
Carbon nanoribbons (CNRs) are graphene (planar) structures with large aspect ratio. Carbon nanobelts (CNBs) are small graphene nanoribbons rolled up into spiral-like structures, i. e., carbon nanoscrolls (CNSs) with large aspect ratio.
B V C Martins, Brenner D W, D S Galvão, Faccio R, Martins B V C, Perim E, Scuseria E   +6 more
core   +1 more source

Alumina–Silica Hybrid Reinforcement in Jute/Epoxy Composites: Mechanical Characterization and Modified Rule of Mixtures for Strength–Toughness–Hardness Optimization

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Natural fiber composites offer sustainable alternatives to synthetic materials but need performance enhancement for structural applications. This study investigates the mechanical behavior of jute fiber–reinforced epoxy composites modified with alumina–silica hybrid fillers at varying compositions and loadings.
Devdyuti Mazumder, Md. Imrul Hasan Ridoy, A. K. M. Masud   +2 more
wiley   +1 more source

Research on hydraulic tension Fuzzy-PID control technology of mine belt conveyor

Meitan kexue jishu
Aiming at the problems of slow response speed, poor regulation, time-varying and nonlinear tensioning control of traditional belt conveyor tensioning system in mine, a Fuzzy-PID control (PID control based on fuzzy algorithm) method of hydraulic ...
Weifeng WANG, Ze YANG, Xuanchong ZHAO, Xiaohan JI, Xiaoyun GUI, Di HE   +5 more
doaj   +1 more source

Finite element analysis of feeding in red and gray squirrels (Sciurus vulgaris and Sciurus carolinensis)

The Anatomical Record, EarlyView.
Abstract Invasive gray squirrels (Sciurus carolinensis) have replaced the native red squirrel (Sciurus vulgaris) across much of Great Britain over the last century. Several factors have been proposed to underlie this replacement, but here we investigated the potential for dietary competition in which gray squirrels have better feeding performance than ...
Philip G. Cox, Peter J. Watson
wiley   +1 more source