Results 31 to 40 of about 204,995 (257)

Livestock Tango: U.S. and Latin America Dance Together, but Who Will Lead?

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT This study examines the competitiveness between Latin American and U.S. livestock and meat sectors. We employ a computable general equilibrium modeling framework to evaluate two scenarios: coordinated improvements in Latin American productivity, transport efficiency, and market access (Scenario I), and the minimum productivity gains required ...
Taís C. Menezes, Amanda M. Countryman, Dustin L. Pendell   +2 more
wiley   +1 more source

Effect of Surface Hardening on Dynamic Frictional Rolling Contact Behavior and Degradation of Corrugated Rail

Shock and Vibration, 2019
The present study was undertaken to evaluate the effect of surface hardening technology on dynamic frictional rolling contact behavior and degradation of corrugated rail in Shenzhen.
Yuan Gao, Jingmang Xu, Ping Wang, Yibin Liu   +3 more
doaj   +1 more source

The Insistence of Blackness and the Persistence of Antiblackness in Ireland

Australian Journal of Social Issues, EarlyView.
ABSTRACT This paper positions Ireland as a critical site for examining the insistence of blackness and an antiblackness created and sustained through Irish ethnonationalist imaginaries and exclusionary processes. Drawing on connected sociologies and Irish Black Studies, this enquiry argues that antiblackness in Ireland operates as a generational force,
Philomena Mullen
wiley   +1 more source

An Enhanced LMMSE Channel Estimation under High Speed Railway Scenarios

, 2017
With the rapid deployment of the high speed railway (HSR), the wireless communication in HSR has been one of the indispensable scenarios in the fifth generation (5G) communications. In order to improve the performance of the orthogonal frequency division
Li, Yuli, Long, Hang, Tang, Qing, Yang, Haojun   +3 more
core   +1 more source

Wide Band Propagation in Train-to-Train Scenarios - Measurement Campaign and First Results [PDF]

, 2017
Within the next decades the railway systems will change to fully autonomous high speed trains (HSTs). An increase in efficiency and safety and a reduction of costs would go hand in hand.
Andreas Lehner, Benjamin Siebler, Damini Gera, Fabrizio Tavano, Maurizio d'Atri, Mohammad Soliman, Paul Unterhuber, Stephan Sand, Thomas Strang   +8 more
core   +1 more source

High speed rail transport valuation [PDF]

, 2008
The present paper investigates the optimal timing of investment for a high speed rail (HSR) project, in an uncertain environment, using a real options analysis (ROA) framework.
Azevedo-Pereira, José, Couto, Gualter, Pimentel, Pedro   +2 more
core   +2 more sources

“Bionopoly” as a Gamechanger? Effects of Gamification on Learning Success, Motivation and Activation Among Medical Students in a Biochemistry Course

Biochemistry and Molecular Biology Education, EarlyView.
ABSTRACT Gamification is characterized by the use of gaming elements in a non‐gaming context. This concept is commonly applied in teaching to create a more meaningful and activating learning environment. The major aim of this study was to compare possible effects of gamification on a traditional interactive teaching concept in a biochemistry course on ...
Eva Stapfer, Ernestine Saumweber, Achim Schneider, Susanne J. Kühl   +3 more
wiley   +1 more source

Observation and Simulation of Axle Box Acceleration in the Presence of Rail Weld in High-Speed Railway

Applied Sciences, 2017
Rail welds are widely used in high-speed railways and short-wave irregularities usually appear due to limitations in welding technology. These irregularities can excite a high wheel/rail force and are regarded as the main cause of deterioration in track ...
Boyang An, Ping Wang, Jingmang Xu, Rong Chen, Dabin Cui   +4 more
doaj   +1 more source

The spread of non‐native species

Biological Reviews, EarlyView.
ABSTRACT The global redistribution of species through human agency is one of the defining ecological signatures of the Anthropocene, with biological invasions reshaping biodiversity patterns, ecosystem processes and services, and species interactions globally.
Phillip J. Haubrock, Ali Serhan Tarkan, Irene Martín‐Forés, Stelios Katsanevakis, Ronaldo Sousa, Ismael Soto, Andy J. Green, Antonín Kouba, Teun Everts, Victoria Dominguez Almela, Nadège Belouard, Cang Hui, Jamie Bojko, Victor Deklerck, Margaux Boeraeve, Franz Essl, J. Robert Britton   +16 more
wiley   +1 more source

Influence of Vibration Isolator Failure on Vehicle Operation Performance and Floating Slab Track Structure Vibration Reduction Effectiveness

Shock and Vibration, 2019
At present, steel-spring floating slabs have been widely used in urban rail transit to reduce the influence of ground vibration caused by vehicle operation on the surrounding environment. As a core part of vibration reduction for floating slab track, the
Caiyou Zhao, Dongya Liu, Xiaoming Zhang, Qiang Yi, Liuchong Wang, Ping Wang   +5 more
doaj   +1 more source