Results 221 to 230 of about 22,153 (316)

Network Structure and the Efficiency Gains from Mergers: Evidence from U.S. Freight Railroads

The RAND Journal of Economics, EarlyView.
ABSTRACT The trade‐off between market power and efficiency gains is central to antitrust analyses of mergers, but empirical evidence quantifying efficiencies remains limited. Using transaction‐level data from U.S. freight railroads (1985–2005), this article quantifies merger‐induced cost efficiencies, driven mainly by eliminating inter‐railroad ...
Yanyou Chen
wiley   +1 more source

Deep learning driven prediction and comparative study of surrounding rock deformation in high speed railway tunnels. [PDF]

Sci Rep
Yang Z, Cheng Z, Wu D.
europepmc   +1 more source

EU Space Law and Earth's Boundaries: Integrating Environmental Impact Assessment and Corporate Due Diligence

Global Policy, EarlyView.
ABSTRACT The European Union's proposed Space Law aims to establish a unified approach for sustainable space activities across the EU. While the EU's satellite constellations contribute to sustainability efforts, they can also have negative environmental impacts.
Elena Cirkovic, Vitali Braun
wiley   +1 more source

Coverage Analysis of 5G Intelligent High-Speed Railway System Based on Beamwidth-Adaptive Free-Space Optical Communication. [PDF]

Sensors (Basel)
Dong S, Zeng ZZ, Zhang DT, Sun ZQ, Wang JY.   +4 more
europepmc   +1 more source

China's Strategic Approach to Tech Diplomacy in a Time of Global Uncertainty

Global Policy, EarlyView.
ABSTRACT In the wake of U.S.‐China technological competition and the COVID‐19 pandemic, “tech diplomacy” has gained prominence in Chinese political and academic discourse. This concept is often ideologically framed to critique Western hegemonic narratives perceived as hindering China's technological advancement.
Zhao Alexandre Huang, Xiang Meng
wiley   +1 more source

Seismic Response Mitigation of Reinforced-Concrete High-Speed Railway Bridges with Hierarchical Curved Steel Dampers. [PDF]

Materials (Basel)
Liang M, Jiang L, He J.
europepmc   +1 more source

Burrow Persistence and Spatial Distribution of Federally and State‐Protected Gopher Tortoise (Gopherus polyphemus) Populations in Southwest Alabama

Animal Conservation, EarlyView.
The gopher tortoise (Gopherus polyphemus), a keystone species and ecosystem engineer, has declined by ~80% over the past century due to primarily habitat loss. In a 28‐year resurvey of federally protected Mobile County and state‐protected Baldwin County, we found tortoise populations persisted at ~59% and ~31% of sites, respectively, with significant ...
Robin B. Lloyd Jr., Jeremiah A. Henning, Steven R. Schultze, David H. Nelson, Adam D. Chupp   +4 more
wiley   +1 more source

A multi-parameters assessment method and prediction model for ground vibration under the high-speed railway bridge. [PDF]

Sci Rep
Yuan W, Jia B, Zhou Z, Zhang J, An P.
europepmc   +1 more source

Measuring the time‐varying market efficiency in the prewar and wartime Japanese stock market, 1924–1943

Asia‐Pacific Economic History Review, Volume 65, Issue 1, Page 131-159, March 2025.
Abstract This study examines the adaptive market hypothesis in the prewar and wartime Japanese stock market using a new market capitalization‐weighted price index. First, we find that the degree of market efficiency varies over time and with major historical events. This implies that the hypothesis is supported in this market.
Kenichi Hirayama, Akihiko Noda
wiley   +1 more source

Study on the spatial mechanical behavior of the cable tower anchorage zone in long-span curved T-shaped rigid-frame extradosed bridge for high-speed railway. [PDF]

Sci Rep
Xie M, Wang K, Guo S, Yang Z, Bai W, Li X.   +5 more
europepmc   +1 more source