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https://www.readbyqxmd.com/read/28429637/analysis-of-rotation-angles-and-motions-of-the-flexible-mechanisms-in-bifurcated-blood-vessels
#1
Bin He, Shoulin Xu, An Ding, Yanmin Zhou
This article investigates the relationship of rotation angle of two ends of elastic guidewires, and motion method of guidewires and catheters in bifurcated blood vessels. The relationship of rotation angles of the two ends of the guidewire has first been studied by mathematical reasoning, indicating that the rotation angle of the front end of guidewire can be precisely described by that of the rear end. In order to satisfy the requirements of different vascular interventional surgeries, we further investigated a general model of bifurcated human blood vessels...
April 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28407100/seqa-structures-behind-escherichia-coli-replication-forks-affect-replication-elongation-and-restart-mechanisms
#2
Ida Benedikte Pedersen, Emily Helgesen, Ingvild Flåtten, Solveig Fossum-Raunehaug, Kirsten Skarstad
The SeqA protein binds hemi-methylated GATC sites and forms structures that sequester newly replicated origins and trail the replication forks. Cells that lack SeqA display signs of replication fork disintegration. The broken forks could arise because of over-initiation (the launching of too many forks) or lack of dynamic SeqA structures trailing the forks. To confirm one or both of these possible mechanisms, we compared two seqA mutants with the oriCm3 mutant. The oriCm3 mutant over-initiates because of a lack of origin sequestration but has wild-type SeqA protein...
April 12, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28340317/opportunities-for-crash-and-injury-reduction-a-multiharm-approach-for-crash-data-analysis
#3
Ann Mallory, Allison Kender, Kevin Moorhouse
OBJECTIVE: A multiharm approach for analyzing crash and injury data was developed for the ultimate purpose of getting a richer picture of motor vehicle crash outcomes for identifying research opportunities in crash safety. METHODS: Methods were illustrated using a retrospective analysis of 69,597 occupant cases from NASS CDS from 2005 to 2015. Occupant cases were analyzed by frequency and severity of outcome: fatality, injury by Abbreviated Injury Scale (AIS), number of cases, attributable fatality, disability, and injury costs...
March 24, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28326809/identifying-factors-affecting-the-safety-of-mid-block-bicycle-lanes-considering-mixed-two-wheeled-traffic-flow
#4
Lu Bai, Ching-Yao Chan, Pan Liu, Chengcheng Xu
OBJECTIVE: Electric bikes (e-bikes) were one of the fastest growing trip modes in Southeast Asia over the past two decades. The increasing popularity of e-bikes raised some safety concerns on urban transport system. The primary objective of this study was to identify whether and how the generalized linear regression model (GLM) could be used to relate the cyclists' safety with various contributing factors when they were riding in a mid-block bike lane. The types of two-wheeled vehicles in the study included bicycle style electric bicycles (BSEBs), scooter style electric bicycles (SSEBs) and regular bicycles (RBs)...
March 22, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28315616/counterfactual-simulations-applied-to-shrp2-crashes-the-effect-of-driver-behavior-models-on-safety-benefit-estimations-of-intelligent-safety-systems
#5
Jonas Bärgman, Christian-Nils Boda, Marco Dozza
As the development and deployment of in-vehicle intelligent safety systems (ISS) for crash avoidance and mitigation have rapidly increased in the last decades, the need to evaluate their prospective safety benefits before introduction has never been higher. Counterfactual simulations using relevant mathematical models (for vehicle dynamics, sensors, the environment, ISS algorithms, and models of driver behavior) have been identified as having high potential. However, although most of these models are relatively mature, models of driver behavior in the critical seconds before a crash are still relatively immature...
March 15, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28296466/road-accident-fatality-risks-for-vulnerable-versus-protected-road-users-in-northern-ghana
#6
James Damsere-Derry, Gavan Palk, Mark King
Background Road traffic injuries (RTIs) are a serious epidemic which claims more than a million lives across the globe each year. The burden of RTIs is particularly pronounced in Africa and other low and middle income countries. The unfavourable disparity of the burden of road trauma in the world is largely attributable to unsafe vehicles, lack of appropriate road infrastructure and the predominance of vulnerable road users (VRUs) in developing countries. However, little research exists in Northern Ghana to highlight the scale and risk of death among road users...
March 15, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28259022/safety-evaluation-of-intersections-with-dynamic-use-of-exit-lanes-for-left-turn-using-field-data
#7
Jing Zhao, Yue Liu
As a newly proposed unconventional intersection design, the exit-lanes for left-turn (EFL) intersection is found to be effective in increasing the intersection capacity with high level of application flexibility, especially under heavy left-turn traffic conditions. However, the operational safety of EFL is of most concern to the authority prior to its implementation. This paper evaluates the safety of the EFL intersections by studying the behavior of left-turn maneuvers using field data collected at 7 locations in China...
March 1, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28217389/management-of-parturients-in-active-labor-with-arnold-chiari-malformation-tonsillar-herniation-and-syringomyelia
#8
Ramsis F Ghaly, Tatiana Tverdohleb, Kenneth D Candido, Nebojsa Nick Knezevic
BACKGROUND: Arnold-Chiari malformation Type 1 (ACM-1) in parturients is a topic of ongoing discussion between obstetricians and anesthesiologists. The primary unanswered question remains; How should the anesthesia provider proceed with labor analgesia and anesthesia for cesarean section when confronted with an advanced, asymptomatic, or minimally symptomatic case of ACM-1 during labor? CASE DESCRIPTION: A 24-year-old, ASA II, G1P0 full-term parturient presented to Labor and Delivery for vaginal delivery...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28214757/staining-in-firearm-barrels-after-experimental-contact-shots
#9
C Schyma, K Bauer, J Brünig, C Courts, B Madea
After contact shots to the head biological traces inside firearm barrels can be found. This study was conducted to simulate and to evaluate such staining. Five current handguns of four inch barrel length in the calibre .22 long rifle, 7.65mm Browning, 9mm Luger and .38 special were used to perform 24 contact shots on silicone coated, gelatine filled box models using the triple contrast method. The staining was documented by endoscopy and swabs gathered from both ends of the barrel were analysed by quantitative PCR...
February 10, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28162916/investigation-on-occupant-injury-severity-in-rear-end-crashes-involving-trucks-as-the-front-vehicle-in-beijing-area-china
#10
Quan Yuan, Meng Lu, Athanasios Theofilatos, Yi-Bing Li
PURPOSE: Rear-end crashes attribute to a large portion of total crashes in China, which lead to many casualties and property damage, especially when involving commercial vehicles. This paper aims to investigate the critical factors for occupant injury severity in the specific rear-end crash type involving trucks as the front vehicle (FV). METHODS: This paper investigated crashes occurred from 2011 to 2013 in Beijing area, China and selected 100 qualified cases i...
February 2017: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28129576/evaluating-the-effectiveness-of-active-vehicle-safety-systems
#11
Eunbi Jeong, Cheol Oh
Advanced vehicle safety systems have been widely introduced in transportation systems and are expected to enhance traffic safety. However, these technologies mainly focus on assisting individual vehicles that are equipped with them, and less effort has been made to identify the effect of vehicular technologies on the traffic stream. This study proposed a methodology to assess the effectiveness of active vehicle safety systems (AVSSs), which represent a promising technology to prevent traffic crashes and mitigate injury severity...
March 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28043070/opportunities-and-limitations-for-intersection-collision-intervention-a-study-of-real-world-left-turn-across-path-accidents
#12
Ulrich Sander
Turning across the path of oncoming vehicle accidents are frequent and dangerous. To date not many car manufacturers have introduced Automated Emergency Braking (AEB) systems addressing this type of conflict situation, but it is foreseeable that these scenarios will be part of the Euro NCAP 2020 rating. Nine out of ten collisions are caused by the driver of the turning vehicle. An AEB system evaluating the ego and conflict vehicle driver's possibilities to avoid a pending crash by either braking or steering was specified for application in various constellations of vehicle collisions...
February 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28043069/comparison-of-multivariate-poisson-lognormal-spatial-and-temporal-crash-models-to-identify-hot-spots-of-intersections-based-on-crash-types
#13
COMPARATIVE STUDY
Wen Cheng, Gurdiljot Singh Gill, Ravi Dasu, Meiquan Xie, Xudong Jia, Jiao Zhou
Most of the studies are focused on the general crashes or total crash counts with considerably less research dedicated to different crash types. This study employs the Systemic approach for detection of hotspots and comprehensively cross-validates five multivariate models of crash type-based HSID methods which incorporate spatial and temporal random effects. It is anticipated that comparison of the crash estimation results of the five models would identify the impact of varied random effects on the HSID. The data over a ten year time period (2003-2012) were selected for analysis of a total 137 intersections in the City of Corona, California...
February 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/27993391/injury-threshold-of-rectus-capitis-muscles-at-the-atlanto-occipital-joint
#14
Richard C Hallgren
OBJECTIVE: The objective of this study was to collect muscle stiffness data from the 4 rectus capitis (RC) muscles to better understand their role in stabilizing the atlanto-occipital joint. The passive load displacement properties of these muscles have not been previously reported. METHODS: Rectus capitis muscles were removed from 3 unembalmed head and neck specimens. Passive length-force (stiffness) data were collected by using a servo-controlled hydraulic test machine...
December 16, 2016: Journal of Manipulative and Physiological Therapeutics
https://www.readbyqxmd.com/read/27898367/effectiveness-of-forward-collision-warning-and-autonomous-emergency-braking-systems-in-reducing-front-to-rear-crash-rates
#15
Jessica B Cicchino
The objective of this study was to evaluate the effectiveness of forward collision warning (FCW) alone, a low-speed autonomous emergency braking (AEB) system operational at speeds up to 19mph that does not warn the driver prior to braking, and FCW with AEB that operates at higher speeds in reducing front-to-rear crashes and injuries. Poisson regression was used to compare rates of police-reported crash involvements per insured vehicle year in 22 U.S. states during 2010-2014 between passenger vehicle models with FCW alone or with AEB and the same models where the optional systems were not purchased, controlling for other factors affecting crash risk...
February 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/27846993/the-interactive-effect-on-injury-severity-of-driver-vehicle-units-in-two-vehicle-crashes
#16
Qiang Zeng, Huiying Wen, Helai Huang
INTRODUCTION: This study sets out to investigate the interactive effect on injury severity of driver-vehicle units in two-vehicle crashes. METHOD: A Bayesian hierarchical ordered logit model is proposed to relate the variation and correlation of injury severity of drivers involved in two-vehicle crashes to the factors of both driver-vehicle units and the crash configurations. A total of 6417 crash records with 12,834 vehicles involved in Florida are used for model calibration...
December 2016: Journal of Safety Research
https://www.readbyqxmd.com/read/27771691/aspiration-of-rear-end-of-pen-in-children-management-issues
#17
S Kalpana, B Sarath Balaji
No abstract text is available yet for this article.
October 8, 2016: Indian Pediatrics
https://www.readbyqxmd.com/read/27754455/study-on-the-fire-damage-characteristics-of-the-new-qidaoliang-highway-tunnel-field-investigation-with-computational-fluid-dynamics-cfd-back-analysis
#18
Hongpeng Lai, Shuyong Wang, Yongli Xie
In the New Qidaoliang Tunnel (China), a rear-end collision of two tanker trunks caused a fire. To understand the damage characteristics of the tunnel lining structure, in situ investigation was performed. The results show that the fire in the tunnel induced spallation of tunnel lining concrete covering 856 m³; the length of road surface damage reached 650 m; the sectional area had a maximum 4% increase, and the mechanical and electrical facilities were severely damaged. The maximum area loss happened at the fire spot with maximum observed concrete spallation up to a thickness of 35...
October 15, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27710775/evaluation-of-the-impacts-of-cooperative-adaptive-cruise-control-on-reducing-rear-end-collision-risks-on-freeways
#19
Ye Li, Hao Wang, Wei Wang, Lu Xing, Shanwen Liu, Xueyan Wei
Although plenty of studies have been conducted recently about the impacts of cooperative adaptive cruise control (CACC) system on traffic efficiency, there are few researches analyzing the safety effects of this advanced driving-assistant system. Thus, the primary objective of this study is to evaluate the impacts of the CACC system on reducing rear-end collision risks on freeways. The CACC model is firstly developed, which is based on the Intelligent Driver Model (IDM). Then, two surrogated safety measures, derived from the time-to-collision (TTC), denoting time exposed time-to-collision (TET) and time integrated time-to-collision (TIT), are introduced for quantifying the collision risks...
January 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/27690834/whiplash-injury-or-concussion-a-possible-biomechanical-explanation-for-concussion-symptoms-in-some-individuals-following-a-rear-end-collision
#20
Benjamin S Elkin, James M Elliott, Gunter P Siegmund
Study Design Finite element modeling of experimental data. Background The clinical presentations of whiplash injury and concussion have considerable overlap. Both diagnoses are generally based on presenting signs and symptoms, and a history of neck or head trauma. With incomplete knowledge of the trauma, differentiating between whiplash injury and concussion can be clinically challenging. Objectives To estimate the brain strains that develop during rear-end car crashes, evaluate how these strains vary with different head kinematic parameters, and compare these strains to those generated during potentially concussive football helmet impacts...
October 2016: Journal of Orthopaedic and Sports Physical Therapy
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