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https://www.readbyqxmd.com/read/28445540/individuals-with-severely-impaired-vision-can-learn-useful-orientation-and-mobility-skills-in-virtual-streets-and-can-use-them-to-improve-real-street-safety
#1
Ellen Lambert Bowman, Lei Liu
Virtual reality has great potential in training road safety skills to individuals with low vision but the feasibility of such training has not been demonstrated. We tested the hypotheses that low vision individuals could learn useful skills in virtual streets and could apply them to improve real street safety. Twelve participants, whose vision was too poor to use the pedestrian signals were taught by a certified orientation and mobility specialist to determine the safest time to cross the street using the visual and auditory signals made by the start of previously stopped cars at a traffic-light controlled street intersection...
2017: PloS One
https://www.readbyqxmd.com/read/28436862/part-based-deep-hashing-for-large-scale-person-re-identification
#2
Fuqing Zhu, Xiangwei Kong, Liang Zheng, Haiyan Fu, Qi Tian
Large scale is a trend in person re-identification (re-id). It is important that real-time search be performed in a large gallery. While previous methods mostly focus on discriminative learning, this paper makes the attempt in integrating deep learning and hashing into one framework to evaluate the efficiency and accuracy for large-scale person reidentification. We integrate spatial information for discriminative visual representation by partitioning the pedestrian image into horizontal parts. Specifically, Part-based Deep Hashing (PDH) is proposed, in which batches of triplet samples are employed as the input of the deep hashing architecture...
April 18, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28436735/risk-and-safety-perception-on-urban-and-rural-roads-effects-of-environmental-features-driver-age-and-risk-sensitivity
#3
Jolene A Cox, Vanessa Beanland, Ashleigh J Filtness
OBJECTIVE: The ability to detect changing visual information is a vital component of safe driving. In addition to detecting changing visual information, drivers must also interpret its relevance to safety. Environmental changes considered to have high safety relevance will likely demand greater attention and more timely responses than those considered to have lower safety relevance. The aim of the present study was to explore factors that are likely to influence perceptions of risk and safety regarding changing visual information in the driving environment...
February 21, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28436734/effects-of-speed-control-measures-on-the-safety-of-unsignalized-mid-block-street-crossings-in-china
#4
Chao Wang, Zhirui Ye, Xinyi Wang, Wenting Li
OBJECTIVE: The primary objective of this study was to evaluate the effects of different speed control measures on the safety of unsignalized mid-block street crossings. METHODS: In China, it is quite difficult to obtain traffic crash and conflict data for pedestrians using such crossings, mainly due to the lack of traffic data management and organizational issues. In light of this, the proposed method did not rely on such data, but considered vehicle speed, which is a leading contributing factor of pedestrian safety at mid-blocks...
February 16, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28425731/changes-in-perception-action-tuning-over-long-time-scales-how-children-and-adults-perceive-and-act-on-dynamic-affordances-when-crossing-roads
#5
Elizabeth E O'Neal, Yuanyuan Jiang, Lucas J Franzen, Pooya Rahimian, Junghum Paul Yon, Joseph K Kearney, Jodie M Plumert
This investigation examined developmental change in how children perceive and act on dynamic affordances when crossing roads on foot. Six- to 14-year-olds and adults crossed roads with continuous cross-traffic in a large-screen, immersive pedestrian simulator. We observed change both in children's gap choices and in their ability to precisely synchronize their movement with the opening of a gap. Younger children were less discriminating than older children and adults, choosing fewer large gaps and more small gaps...
April 20, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28420108/a-robust-crowdsourcing-based-indoor-localization-system
#6
Baoding Zhou, Qingquan Li, Qingzhou Mao, Wei Tu
WiFi fingerprinting-based indoor localization has been widely used due to its simplicity and can be implemented on the smartphones. The major drawback of WiFi fingerprinting is that the radio map construction is very labor-intensive and time-consuming. Another drawback of WiFi fingerprinting is the Received Signal Strength (RSS) variance problem, caused by environmental changes and device diversity. RSS variance severely degrades the localization accuracy. In this paper, we propose a robust crowdsourcing-based indoor localization system (RCILS)...
April 14, 2017: Sensors
https://www.readbyqxmd.com/read/28419017/the-evaluation-of-trauma-care-the-comparison-of-2-high-level-pediatric-emergency-departments-in-the-united-states-and-turkey
#7
Alkan Bal, Michael Cooper, Amanda Lee, Murat Anil, Halim Hennes
OBJECTIVE: The purpose of the study is to compare the outcomes of pediatric trauma patients with motor vehicle crashes (MVCs) and motor vehicle versus pedestrian crashes (MPCs) at a level 1 pediatric trauma center in the United States and a pediatric trauma center in Turkey. METHODS: The medical records of all pediatric MVC and MPC subjects presenting to the emergency departments (EDs) of a level 3 hospital in Turkey (Izmir Tepecik Training and Research Hospital [ITTRH]) and a level 1 pediatric trauma center in the United States (Children's Medical Center Dallas [CMCD]) over a 1-year period were reviewed...
April 18, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28417906/random-finite-set-based-bayesian-filtering-with-opencl-in-a-heterogeneous-platform
#8
Biao Hu, Uzair Sharif, Rajat Koner, Guang Chen, Kai Huang, Feihu Zhang, Walter Stechele, Alois Knoll
While most filtering approaches based on random finite sets have focused on improving performance, in this paper, we argue that computation times are very important in order to enable real-time applications such as pedestrian detection. Towards this goal, this paper investigates the use of OpenCL to accelerate the computation of random finite set-based Bayesian filtering in a heterogeneous system. In detail, we developed an efficient and fully-functional pedestrian-tracking system implementation, which can run under real-time constraints, meanwhile offering decent tracking accuracy...
April 12, 2017: Sensors
https://www.readbyqxmd.com/read/28417686/trauma-epidemiology-in-puerto-rico-in-hospital-morbidity-and-mortality-from-2002-to-2011
#9
Annette Pascual-Marrero, Ediel O Ramos-Meléndez, Omar García-Rodríguez, José E Morales-Quiñones, Pablo Rodríguez-Ortiz
This study aimed to describe the distribution of injury mechanisms and to assess the impact of those mechanisms on the morbidity and mortality of trauma. All patients admitted to Puerto Rico Trauma Hospital (2002-2011) for road-traffic collisions (RTCs, 5,371), gunshot wounds (GSWs, 2,946), falls (2,319), pedestrian accidents (1,652), and stab wounds (SWs, 1,073) were selected. Gunshot victims were 1.19 (95%CI: 1.07-1.33) times as likely as road-traffic victims to have an ISS ≥25. Pedestrians were 1.76 (95%CI: 1...
April 18, 2017: International Journal of Injury Control and Safety Promotion
https://www.readbyqxmd.com/read/28415258/fluctuations-around-mean-walking-behaviors-in-diluted-pedestrian-flows
#10
Alessandro Corbetta, Chung-Min Lee, Roberto Benzi, Adrian Muntean, Federico Toschi
Understanding and modeling the dynamics of pedestrian crowds can help with designing and increasing the safety of civil facilities. A key feature of a crowd is its intrinsic stochasticity, appearing even under very diluted conditions, due to the variability in individual behaviors. Individual stochasticity becomes even more important under densely crowded conditions, since it can be nonlinearly magnified and may lead to potentially dangerous collective behaviors. To understand quantitatively crowd stochasticity, we study the real-life dynamics of a large ensemble of pedestrians walking undisturbed, and we perform a statistical analysis of the fully resolved pedestrian trajectories obtained by a yearlong high-resolution measurement campaign...
March 2017: Physical Review. E
https://www.readbyqxmd.com/read/28409733/endovascular-management-of-acute-epidural-hematomas-clinical-experience-with-80-cases
#11
Carlos Michel A Peres, Jose Guilherme M P Caldas, Paulo Puglia, Almir F de Andrade, Igor A F da Silva, Manoel J Teixeira, Eberval G Figueiredo
OBJECTIVE Small acute epidural hematomas (EDHs) treated conservatively carry a nonmeasurable risk of late enlargement due to middle meningeal artery (MMA) lesions. Patients with EDHs need to stay hospitalized for several days, with neurological supervision and repeated CT scans. In this study, the authors analyzed the safety and efficacy of the embolization of the involved MMA and associated lesions. METHODS The study group consisted of 80 consecutive patients harboring small- to medium-sized EDHs treated by MMA embolization between January 2010 and December 2014...
April 14, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28409387/fatal-abdominal-injuries-in-a-bicycle-pedestrian-collision-reconstruction-using-multibody-simulation
#12
Holger Muggenthaler, Stefanie Drobnik, Michael Hubig, Wolfgang Fiebig, Gita Mall
Fatal bicycle-pedestrian collisions do not occur frequently and thus are rarely reported in literature. Pedestrians in bicycle-pedestrian accidents often sustain severe craniocerebral injuries caused by a collision induced fall with head impact on the road surface. We describe a case where a pedestrian crossing a road was hit by a bicycle. Hematomas of the left lower leg and of the left flank/abdomen were found to be caused by the primary impact. However, the fatal injuries were found to be contralateral with a rupture of the right renal pedicle, a rupture of the right lobe of the liver and a tear of the vena cava...
April 13, 2017: Forensic Science, Medicine, and Pathology
https://www.readbyqxmd.com/read/28406471/real-time-vision-based-road-sign-recognition-using-an-artificial-neural-network
#13
Kh Tohidul Islam, Ram Gopal Raj
Road sign recognition is a driver support function that can be used to notify and warn the driver by showing the restrictions that may be effective on the current stretch of road. Examples for such regulations are 'traffic light ahead' or 'pedestrian crossing' indications. The present investigation targets the recognition of Malaysian road and traffic signs in real-time. Real-time video is taken by a digital camera from a moving vehicle and real world road signs are then extracted using vision-only information...
April 13, 2017: Sensors
https://www.readbyqxmd.com/read/28406325/akinetic-mutism-in-a-patient-with-mild-traumatic-brain-injury-a-diffusion-tensor-tractography-study
#14
Sung Ho Jang, Hyeok Gyu Kwon
OBJECTIVES: Akinetic mutism (AM) is characterized by a complete absence of spontaneous behaviour and speech. We report on a patient with AM associated with injury of the prefronto-caudate tract and prefronto-thalamic tract following mild traumatic brain injury (TBI), diffusion tensor tractography (DTT). CASE PRESENTATION: A 20-year-old man suffered from TBI resulting from a pedestrian car accident. Following the TBI, he developed abulia (decreased activity and speech) that worsened over approximately a year...
April 13, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28405352/modelling-human-perception-processes-in-pedestrian-dynamics-a-hybrid-approach
#15
A Colombi, M Scianna
In this paper, we present a hybrid mathematical model describing crowd dynamics. More specifically, our approach is based on the well-established Helbing-like discrete model, where each pedestrian is individually represented as a dimensionless point and set to move in order to reach a target destination, with deviations deriving from both physical and social forces. In particular, physical forces account for interpersonal collisions, whereas social components include the individual desire to remain sufficiently far from other walkers (the so-called territorial effect)...
March 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28400667/epidemiology-of-lower-limb-musculoskeletal-trauma-with-associated-vascular-injuries-in-a-tertiary-care-institute-in-india
#16
Nirmal Raj Gopinathan, Siva Swaminathan Santhanam, Balaji Saibaba, Mandeep Singh Dhillon
BACKGROUND: Vascular trauma associated with bony injuries is an orthopaedic emergency. Lack of timely intervention can lead to loss of limb or even life. Inspite of the rising incidence of high speed road traffic accidents in India, there is paucity of literature regarding the demographic pattern, clinical morbidity, management strategies and outcome of arterial injuries associated with lower limb trauma. The aim of this study is to describe the epidemiology and outcome of lower extremity musculoskeletal trauma with associated vascular injuries in a tertiary care institute in India...
March 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28398232/use-of-the-magnetic-field-for-improving-gyroscopes-biases-estimation
#17
Estefania Munoz Diaz, Fabian de Ponte Müller, Juan Jesús García Domínguez
An accurate orientation is crucial to a satisfactory position in pedestrian navigation. The orientation estimation, however, is greatly affected by errors like the biases of gyroscopes. In order to minimize the error in the orientation, the biases of gyroscopes must be estimated and subtracted. In the state of the art it has been proposed, but not proved, that the estimation of the biases can be accomplished using magnetic field measurements. The objective of this work is to evaluate the effectiveness of using magnetic field measurements to estimate the biases of medium-cost micro-electromechanical sensors (MEMS) gyroscopes...
April 11, 2017: Sensors
https://www.readbyqxmd.com/read/28396632/steady-beat-sound-facilitates-both-coordinated-group-walking-and-inter-subject-neural-synchrony
#18
Shigeyuki Ikeda, Takayuki Nozawa, Ryoichi Yokoyama, Atsuko Miyazaki, Yukako Sasaki, Kohei Sakaki, Ryuta Kawashima
Group walking is a collective social interaction task as pedestrians are required to determine their own pace of walking on the basis of surrounding others' states. The steady beat sound is known to be a controllable factor that contributes to relative success/failure of coordinated group walking since the beat improves pedestrian flow in congested situation. According to some reports, inter-personal interaction synchronizes inter-personal brain activity in the prefrontal region, which supports social cognitive processes required for successful inter-individual coordination, such as predicting each other's state; success/failure of a coordinated task is associated with increase/decrease in inter-subject neural synchrony (INS)...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28394932/radar-detection-of-pedestrian-induced-vibrations-on-michelangelo-s-david
#19
Massimiliano Pieraccini, Michele Betti, Davide Forcellini, Devis Dei, Federico Papi, Gianni Bartoli, Luca Facchini, Riccardo Corazzi, Vladimir Cerisano Kovacevic
This paper summarizes the results of a two-day dynamic monitoring of Michelangelo's David subject to environmental loads (city traffic and pedestrian loading induced by tourists visiting the Accademia Gallery). The monitoring was carried out by a no-contact technique using an interferometric radar, whose effectiveness in measuring the resonant frequencies of structures and historic monuments has proved over the last years through numerous monitoring activities. Owing to the dynamic behavior of the measurement system (radar and tripod), an accelerometer has been installed on the radar head to filter out the movement component of the measuring instrument from the measurement of the David's displacement...
2017: PloS One
https://www.readbyqxmd.com/read/28389290/symptomatic-intragraft-thrombus-following-endovascular-repair-of-blunt-thoracic-aortic-injury
#20
Sherwin Abdoli, Sung Wan Ham, Alison G Wilcox, Fernando Fleischman, Lydia Lam
INTRODUCTION: Thoracic endovascular aortic repair (TEVAR) can be complicated by graft collapse, endoleaks, and stent migration. The incidence of these complications and other outcomes is poorly understood in young trauma victims who receive endovascular aortic repair of blunt thoracic aortic injury. REPORT: A 29 year-old pedestrian was struck by a vehicle resulting in polytrauma including blunt thoracic aortic injury (BTAI) with transection distal to the left subclavian artery origin...
April 4, 2017: Annals of Vascular Surgery
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