Wireless communication for high-speed railways (HSRs) that provides reliable and high data rate communication between the train and trackside networks is a challenging task. It is estimated that the wireless communication traffic could be as high as 65 Mbps per high-speed train. The development of such HSR communications systems and standards requires, in turn, accurate models for the HSR propa...

A 30-year-old male car driver died after an accident involving a collision with a guardrail barrier on a viaduct. He died before cardiopulmonary resuscitation (CPR) was applied at the accident scene. Autopsy was not permitted due to local culture and family wishes. Multislice computed tomography (MSCT) was used to image the body. The results revealed that death was due to acute pericardial tamp...

A high-speed railway viaduct experienced a sustained heave at high rates after its construction. The pillars of the bridge are founded on an Eocene hard anhydritic-gypsiferous claystone by means of massive foundations. Field investigations identified an active layer below the piles’ tips where expansions occur as a result of gypsum crystal growth in discontinuities from supersaturated aqueous s...

Abstract Memories and pride of the past related to cultural places, often provided by urban infrastructure itself, are resources for development regional identity, which can be recreated, interpreted re-functionalized suit current future generations. This work uses an retrofit intervention model in central area Brasília, represented Galeria dos Estados viaduct, capital's main arterial road. The...

This paper presents the analysis of Ricean K-factor for wideband high-speed railway channels at 2.35 GHz, based on radio channel measurements under viaduct and U-shape cutting scenarios. We characterize the K-factor from the perspective of narrowband, wideband and delay, according to the measured channel responses. The time-frequency varying narrowband K-factors in two scenarios are analyzed an...

The road and railway infrastructure in Poland has been intensively developed and modernized for the last years. Around 300 new bridges are built annually. Among the new structures, there is a group of modern extradosed bridges. This paper presents examples of short-, medium-, and long-span extradosed bridges designed and built in recent years in Poland. The following structures are described in...