Results 11 to 20 of about 173,615 (287)
New Journal of Physics, 2004 The simplest, `standard' model of Big Bang Nucleosynthesis (SBBN) assumes three light neutrinos (N_nu = 3) and no significant electron neutrino asymmetry, leaving only one adjustable parameter: the baryon to photon ratio eta. The primordial abundance of any one nuclide can, therefore, be used to measure the baryon abundance and the value derived from ...
Kneller, James P., Steigman, Gary
openaire +3 more sources
Leptogenesis for pedestrians [PDF]
Annals of Physics, 2005 During the process of thermal leptogenesis temperature decreases by about one order of magnitude while the baryon asymmetry is generated. We present an analytical description of this process so that the dependence on the neutrino mass parameters becomes transparent.
Buchmuller, Wilfried +2 more
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Objects detection theory for evaluating the city environmental quality
Frontiers in Ecology and Evolution, 2023 IntroductionThe primary focus of this paper is to assess urban ecological environments by employing object detection on spatial-temporal data images within a city, in conjunction with other relevant information through data mining.MethodsFirstly, an ...
Tong Liu +5 more
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Taking a look at small-scale pedestrians and occluded pedestrians [PDF]
, 2019 Small-scale pedestrian detection and occluded pedestrian detection are two challenging tasks. However, most state-of-the-art methods merely handle one single task each time, thus giving rise to relatively poor performance when the two tasks, in practice,
Cao, Jiale +4 more
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Moving shadow detection via binocular vision and colour clustering
IET Computer Vision, 2020 A pedestrian segmentation algorithm in the presence of cast shadows is presented in this study. The novelty of this algorithm lies in the fusion of multi‐view and multi‐plane homographic projections of foregrounds and the use of the fused data to guide ...
Lei Lu +3 more
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Environmental factors influencing the distribution of pedestrian traffic accidents in Iran
Archives of Trauma Research, 2020 Background: This study aimed to determine the environmental factors affecting the frequency of accidents leading to injury and death related to pedestrians in 31 provinces of Iran.
Amir Kavousi +3 more
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INTELLIGENT SYSTEM FOR IMPROVED SAFETY OF PEDESTRIAN TRAFFIC LIGHTS [PDF]
Transport Problems, 2019 The high concentration of vehicles and pedestrians at traffic lights makes them a common place for road accidents to occur. The main reason for them is the behavior of vehicle drivers and pedestrians, who often violate the traffic law because of ...
Boris EVSTATIEV +3 more
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User Equilibrium Route Assignment for Microscopic Pedestrian Simulation [PDF]
, 2014 For the simulation of pedestrians a method is introduced to find routing alternatives from any origin position to a given destination area in a given geometry composed of walking areas and obstacles. The method includes a parameter which sets a threshold
Hofsäß, Ingmar +2 more
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Personal Exposure to PM2.5 in the Megacity of Mexico: A Multi-Mode Transport Study
Atmosphere, 2018 Recurrent personal exposure to ambient PM2.5 is associated with adverse human health effects, in particular on the respiratory and cardiovascular systems.
Iván Y. Hernández-Paniagua +9 more
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A Pilot Study of Pedestrians with Visual Impairments Detecting Traffic Gaps and Surges Containing Hybrid Vehicles [PDF]
, 2011 The increasing number of hybrid and quiet internal combustion engine vehicles may impact the travel abilities of pedestrians who are blind. Pedestrians who rely on auditory cues for structuring their travel may face challenges in making crossing ...
Emerson, Robert Wall +3 more
core +2 more sources