Results 11 to 20 of about 626,697 (269)
Papéis Avulsos de Zoologia, 2005 Over the last decades, Neotropical region has been subdivided into smaller units (areas of endemism), yet these subdivisions were not necessarily based on an evolutionary perspective.
Silvio Shigueo Nihei +1 more
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Dynamic performance of low vibration slab track on shared high-speed passenger and freight railway
Transport, 2018 This work investigates dynamic performance of a low vibration slab track on a shared high-speed passenger and freight railway, and an optimal modulus of the isolation layer (rubber pad) is proposed to meet the adaptability of the track system under the ...
Qinglie He +4 more
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Motion analysis by feature tracking
Vision Research, 1998 We have developed a two-stage model of motion perception that identifies moving spatial features and computes their velocity, achieving both high spatial localisation and reliable estimates of velocity. Features are detected in each frame by locating the peaks of the spatial local energy functions, as for stationary images (Morrone MC and Burr DC. Proc
Del Viva MM, MORRONE, MARIA CONCETTA
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A News Analysis and Tracking System [PDF]
, 2009 Continuous monitoring of web-based news sources has emerged as a key intelligence task particularly for Homeland Security. We propose a system for web-based news tracking and alerting. Unlike subscription-based alerts, alerting is implemented as a personalized service where the system is trained to recognize potentially important news based on user ...
S. K. Mirajul Haque +2 more
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Investigation of the Track Gauge in Curved Sections, Considering Hungarian Railway Lines
Infrastructures, 2023 In this paper, the authors examined the change in track gauges in curves for several railway lines with low and high traffic in Hungary (i.e., secondary lines and main lines).
Szabolcs Fischer +2 more
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Evaluation of Structural Stresses of Mountain-Embedded Railway Systems
Applied Sciences, 2023 Mountain railways are constructed on terrains with steep gradients and operate under unique conditions as they climb slopes at low speeds using rack rails. Recently, mountain railway systems in the form of embedded rail systems (ERSs) have been developed
Hochan Lee +5 more
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Investigation of the Influences of Track Superstructure Parameters on Ballasted Railway Track Design [PDF]
Civil Engineering Infrastructures Journal, 2015 The main design criteria of ballasted railway tracks include rail deflections, rail bending stresses, rail wheel contact stresses, sleeper bending moments and ballast sleeper contact pressures.
Javad Sadeghi +2 more
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Nanoparticle tracking analysis
Open Schools Journal for Open Science, 2020 Due to their extremely small size, nanoparticles cannot be analyses by conventional approaches such as light microscopy. To visualise particles in the nanoscale range, a combination of an ultra-microscope and a laser illumination unit has to be applied.
Peneder, H. +4 more
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Nature Communications, 2017 Biliverdin reductase (BVR) catalyses the last step in haem degradation. Here the authors present the crystal structure of cyanobacterial BVR bound to its substrate biliverdin and oxidised cofactor NADP+, which was used to propose the catalytic mechanism ...
Haruna Takao +16 more
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Applied Sciences, 2020 A quick-hardening track (QHT) was developed by injecting quick-hardening mortar into an existing ballast track to rapidly substitute the ballast track with a slab track, thereby improving maintainability and running safety. QHT tracks on a bridge undergo
Sanghyeon Cho +4 more
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