The Influence of Gait Stance and Vehicle Type On Pedestrian Kinematics and Injury Risk

2021 ◽  
Author(s):  
Wansoo Pak ◽  
Daniel Grindle ◽  
Costin Untaroiu
Keyword(s):  
Injury Risk ◽  
Leading Edge ◽  
Head Region ◽  
High Profile ◽  
Low Profile ◽  
Active Safety Systems ◽  
The Usa ◽  
Post Impact ◽  
Human Body Models ◽  
Safety Systems

Abstract Pedestrians are one of the most vulnerable road users. In 2019, the USA reported the highest number of pedestrian fatalities in nearly three decades. The pre-impact conditions of Car-to-Pedestrian Collisions (CPC) vary significantly in terms of vehicles characteristics (e.g. front-end geometry, stiffness, etc.) and pedestrian characteristics (e.g. anthropometry, posture, etc.). The influence of pedestrian gait posture on CPC injury outcomes has not been well analyzed. The purpose of this study was to numerically investigate the changes in pedestrian kinematics and injuries across various gait postures in two different vehicle impacts. Five finite element (FE) human body models, that represent the 50th percentile male through the gait cycle, were developed and used to perform CPC simulations with two generic vehicle models representing a low-profile and high-profile vehicle. In the impacts with the high-profile vehicle, the pedestrian models usually slid above the bonnet leading edge and reported shorter wrap around distances than the low-profile vehicle impacts. The pedestrian postures influenced the post-impact rotation of the pedestrian and consequently, the impacted head region. Pedestrian posture also influenced the risk of injuries in the lower and upper extremities. Higher bone bending moments were observed in the stance phase posture compared to the swing phase. The findings of this study should be taken into consideration when examining pedestrian protection protocols. In addition, the results of this study can be used to improve the design of active safety systems used to protect pedestrians in collisions.

The Influence of Gait Stance and Vehicle Type on Pedestrian Kinematics and Injury Risk

2020 ◽  
Author(s):  
Wansoo Pak ◽  
Daniel Grindle ◽  
Costin Untaroiu
Keyword(s):  
Injury Risk ◽  
Bone Fractures ◽  
Leading Edge ◽  
Pedestrian Protection ◽  
Head Region ◽  
Vehicle Type ◽  
Low Profile ◽  
Active Safety Systems ◽  
The Usa ◽  
Human Body Models

Abstract Pedestrians are one of the most vulnerable road users. In 2018 the USA reported the highest number of pedestrian fatalities number in nearly three decades. Government safety agencies and car manufacturers have started paying greater attention towards pedestrian protection. The pre-impact conditions of Car-to-Pedestrian Collisions (CPC) varies significantly in terms of the characteristics of vehicles (e.g. front-end geometry, stiffness, etc.) and pedestrians (e.g. anthropometry, posture, etc.). The influence of vehicle type and pedestrian gait has not been analyzed. The purpose of this study was to numerically investigate the changes in pedestrian kinematics and injuries across various gait postures and two different car types. Five finite element (FE) human body models, representing 50th percentile male in gait cycle, were developed and used to perform CPC simulations with two generic vehicle FE models representing a family car (FCR), and a sport utility vehicle (SUV). In the impacts with the high-profile vehicle (SUV), the pedestrian models usually slide above the bonnet leading edge and report shorter wrap around distances (WAD) than in low-profile vehicle (FCR) impacts. The pedestrian postures influenced the post-impact rotation of the pedestrian and consequently, the impacted head region. The pedestrian posture also influenced the risk of injuries in the lower extremities. Higher risk of bone fractures was observed in the stance phase posture compared to the swing phase. The findings of this study should be taken into consideration when examining pedestrian protection protocols. In addition, the results of this study can be used to improve the design of active safety systems used to protect pedestrians in collisions.

scholarly journals Personalization of a Human Body Model Using Subject-Specific Dimensions for Designing Clothing Patterns

2021 ◽  
Vol 11 (21) ◽  
pp. 10138
Author(s):  
Luděk Hynčík ◽  
Hana Čechová ◽  
Tomasz Bońkowski ◽  
Gabriela Kavalířová ◽  
Petra Špottová ◽  
...  
Keyword(s):  
Human Body ◽  
Injury Risk ◽  
Population Group ◽  
Human Body Model ◽  
Chinese Adults ◽  
Biomechanical Models ◽  
Body Model ◽  
Subject Specific ◽  
Human Body Models ◽  
Safety Systems

Virtual human body models contribute to designing safe and user-friendly products through virtual prototyping. Anthropometric biomechanical models address different physiques using average dimensions. In designing, e.g., personal protective equipment, orthopedic tools, or vehicle safety systems, biomechanical models with the correct geometry and shape shall play a role. The presented study shows the variations of subject-specific anthropometric dimensions from the average of the different population groups in the Czech Republic and China as a background for the need for personalized human body models. The study measures a set of dimensions used to design clothing patterns of Czech children, Czech adolescents, Czech adults, and Chinese adults and compares them to the corresponding age average, which is represented by a scaled anthropometric human body model. The cumulative variation of the dimensions used to design the clothing patterns increases the further the population group is from the average. It is smallest for the Czech adults at 7.54 ± 6.63%; Czech adolescents report 7.93 ± 6.25%; Czech children differ be 9.52 ± 6.08%. Chinese adults report 10.86 ± 11.11%. The variations from the average of the particular dimensions used to design clothing patterns prove the necessity of having personalized subject-specific models. The measured dimensions used to design the clothing patterns serve as the personalization of particular body segments and lead to a subject-specific virtual model. The developed personalization algorithm results in the continuous body surface desired for contact applications for assessing body behavior and injury risk under impact loading.

Fahrzeugsicherheit

2019 ◽  
Keyword(s):  
Injury Risk ◽  
Central Element ◽  
Autonomous Driving ◽  
Automated Driving ◽  
Test Environment ◽  
Car Seat ◽  
Human Body Models ◽  
The Individual ◽  
Safety Systems ◽  
Comprehensive Study

Dieser VDI-Bericht ist ausschließlich als PDF-Dokument erschienen! Inhalt Vorwort 1 R. Schöneburg, Mercedes-Benz AG S. Müller, Technische Universität Berlin Auswirkung automatisierten Fahrens auf die Fahrzeugsicherheit Sicherheit zukünftiger hochautomatischer Fahrzeuge im Mischverkehr – Anforderungen, Lösungskonzepte und Potenzialabschätzungen 3 H. Freienstein, J. Kolatschek, G. A. D‘Addetta, Bosch Research, Vehicle Safety and Automated Driving, Robert Bosch GmbH Erkennung der kognitiven Belastung eines Fahrers anhand von Vitalparametern aus realen Fahrzeugsensoren 21 F. Ripper, K. Mahdi, Joyson Safety Systems Aschaffenburg GmbH, Berlin Injury Risk on Rearward Facing Seats in Frontal Impact – Sled Tests and Simulation in a Generic Test Environment  41 H. Zellmer, A. Soni, S. Schilling, B. Eickhoff, Autoliv B.V. & Co. KG, Elmshorn The individual safety of a car seat as a central element of autonomous driving – A comprehensive study of ATDs and human body models based...

scholarly journals Kinetic and Kinematic Features of Pedestrian Avoidance Behavior in Motor Vehicle Conflicts

2021 ◽  
Vol 9 ◽  
Author(s):  
Quan Li ◽  
Shi Shang ◽  
Xizhe Pei ◽  
Qingfan Wang ◽  
Qing Zhou ◽  
...  
Keyword(s):  
Injury Risk ◽  
Muscle Activation ◽  
Motor Vehicle ◽  
Movement Velocity ◽  
Physiological Signal ◽  
Avoidance Behaviors ◽  
Active Safety Systems ◽  
Traffic Conflict ◽  
Human Body Models ◽  
Biomechanical Features

The active behaviors of pedestrians, such as avoidance motions, affect the resultant injury risk in vehicle–pedestrian collisions. However, the biomechanical features of these behaviors remain unquantified, leading to a gap in the development of biofidelic research tools and tailored protection for pedestrians in real-world traffic scenarios. In this study, we prompted subjects (“pedestrians”) to exhibit natural avoidance behaviors in well-controlled near-real traffic conflict scenarios using a previously developed virtual reality (VR)-based experimental platform. We quantified the pedestrian–vehicle interaction processes in the pre-crash phase and extracted the pedestrian postures immediately before collision with the vehicle; these were termed the “pre-crash postures.” We recorded the kinetic and kinematic features of the pedestrian avoidance responses—including the relative locations of the vehicle and pedestrian, pedestrian movement velocity and acceleration, pedestrian posture parameters (joint positions and angles), and pedestrian muscle activation levels—using a motion capture system and physiological signal system. The velocities in the avoidance behaviors were significantly different from those in a normal gait (p < 0.01). Based on the extracted natural reaction features of the pedestrians, this study provides data to support the analysis of pedestrian injury risk, development of biofidelic human body models (HBM), and design of advanced on-vehicle active safety systems.

iB1350: A Generation III.7 Reactor After the Fukushima Daiichi Accident

2016 ◽  
Author(s):  
Takashi Sato ◽  
Keiji Matsumoto ◽  
Kenji Hosomi ◽  
Keisuke Taguchi
Keyword(s):  
Cooling System ◽  
Boiling Water ◽  
Passive Safety ◽  
Active Safety ◽  
Water Reactor ◽  
Airplane Crash ◽  
Passive Safety Systems ◽  
Active Safety Systems ◽  
Fukushima Daiichi ◽  
Safety Systems

iB1350 stands for an innovative, intelligent and inexpensive boiling water reactor 1350. It is the first Generation III.7 reactor after the Fukushima Daiichi accident. It has incorporated lessons learned from the Fukushima Daiichi accident and Western European Nuclear Regulation Association safety objectives. It has innovative safety to cope with devastating natural disasters including a giant earthquake, a large tsunami and a monster hurricane. The iB1350 can survive passively such devastation and a very prolonged station blackout without any support from the outside of a site up to 7 days even preventing core melt. It, however, is based on the well-established proven Advance Boiling Water Reactor (ABWR) design. The nuclear steam supply system is exactly the same as that of the current ABWR. As for safety design it has a double cylinder reinforced concrete containment vessel (Mark W containment) and an in-depth hybrid safety system (IDHS). The Mark W containment has double fission product confinement barriers and the in-containment filtered venting system (IFVS) that enable passively no emergency evacuation outside the immediate vicinity of the plant for a severe accident (SA). It has a large volume to hold hydrogen, a core catcher, a passive flooding system and an innovative passive containment cooling system (iPCCS) establishing passively practical elimination of containment failure even in a long term. The IDHS consists of 4 division active safety systems for a design basis accident, 2 division active safety systems for a SA and built-in passive safety systems (BiPSS) consisting of an isolation condenser (IC) and the iPCCS for a SA. The IC/PCCS pools have enough capacity for 7-day grace period. The IC/PCCS heat exchangers, core and spent fuel pool are enclosed inside the containment vessel (CV) building and protected against a large airplane crash. The iB1350 can survive a large airplane crash only by the CV building and the built-in passive safety systems therein. The dome of the CV building consists of a single wall made of steel and concrete composite. This single dome structure facilitates a short-term construction period and cost saving. The CV diameter is smaller than that of most PWR resulting in a smaller R/B. Each active safety division includes only one emergency core cooling system (ECCS) pump and one emergency diesel generator (EDG). Therefore, a single failure of the EDG never causes multiple failures of ECCS pumps in a safety division. The iB1350 is based on the proven ABWR technology and ready for construction. No new technology is incorporated but design concept and philosophy are initiative and innovative.

scholarly journals Vehicle Sideslip Angle Estimation Using Two Single-Antenna GPS Receivers

2010 ◽  
Author(s):  
Jong-Hwa Yoon ◽  
Huei Peng
Keyword(s):  
Low Cost ◽  
Longitudinal Velocity ◽  
Stability Control ◽  
Estimation Accuracy ◽  
Measurement Unit ◽  
Sideslip Angle ◽  
Gps Receivers ◽  
Single Antenna ◽  
Active Safety Systems ◽  
Safety Systems

Knowing vehicle sideslip angle accurately is critical for active safety systems such as Electronic Stability Control (ESC). Vehicle sideslip angle can be measured through optical speed sensors, or dual-antenna GPS. These measurement systems are costly (∼$5k to $100k), which prohibits wide adoption of such systems. This paper demonstrates that the vehicle sideslip angle can be estimated in real-time by using two low-cost single-antenna GPS receivers. Fast sampled signals from an Inertial Measurement Unit (IMU) compensate for the slow update rate of the GPS receivers through an Extended Kalman Filter (EKF). Bias errors of the IMU measurements are estimated through an EKF to improve the sideslip estimation accuracy. A key challenge of the proposed method lies in the synchronization of the two GPS receivers, which is achieved through an extrapolated update method. Analysis reveals that the estimation accuracy of the proposed method relies mainly on vehicle yaw rate and longitudinal velocity. Experimental results confirm the feasibility of the proposed method.

Fisheries Co-operation in the South China Sea and the (Ir)relevance of the Sovereignty Question

2011 ◽  
Vol 2 (1) ◽  
pp. 59-88 ◽  
Author(s):  
Thang NGUYEN DANG
Keyword(s):  
South China Sea ◽  
South China ◽  
The South China Sea ◽  
The South ◽  
China Sea ◽  
High Profile ◽  
Spratly Islands ◽  
Low Profile ◽  
Viable Solution ◽  
Petroleum Development

Joint petroleum development has often been considered as a viable solution to the seemingly intractable Spratly Islands dispute in the South China Sea (SCS). This is, however, more easily said than done. On the other hand, little attention is paid to fisheries co-operation in the SCS despite the fact that fisheries constitute an important part in the economies of coastal states. The present laissez-faire approach to fisheries in the disputed area gives rise to friction and tension. By highlighting the salient features of existing fisheries’ co-operative arrangements in the world, this article demonstrates the merits of a fisheries arrangement in the SCS. It also argues that fisheries co-operation, as a low-profile undertaking, is probably easier to achieve than joint petroleum development. A fisheries arrangement would serve the immediate interests of parties to the Spratly Islands dispute and may pave the way for their future high-profile co-operation, i.e. joint petroleum development.

scholarly journals Cannabis and epilepsy

2018 ◽  
Vol 18 (6) ◽  
pp. 465-471 ◽  
Author(s):  
Rhys H Thomas ◽  
Mark O Cunningham
Keyword(s):  
Treatment Options ◽  
Current Treatment ◽  
High Profile ◽  
High Street ◽  
The Usa ◽  
The Difference ◽  
The One ◽  
The Uk ◽  
Genetic Epilepsies ◽  
Trial Evidence

Click here to listen to the PodcastThe one-third of people who do not gain seizure control through current treatment options need a revolution in epilepsy therapeutics. The general population appears to be showing a fundamental and rapid shift in its opinion regarding cannabis and cannabis-related drugs. It is quite possible that cannabidiol, licensed in the USA for treating rare genetic epilepsies, may open the door for the widespread legalisation of recreational cannabis. It is important that neurologists understand the difference between artisanal cannabidiol products available legally on the high street and the cannabidiol medications that have strong trial evidence. In the UK in 2018 there are multiple high-profile reports of the response of children taking cannabis-derived medication, meaning that neurologists are commonly asked questions about these treatments in clinic. We address what an adult neurologist needs to know now, ahead of the likely licensing of Epidiolex in the UK in 2019.

Two newly identified cheiracanthid acanthodians from the Mey Flagstone Formation (Givetian, Middle Devonian) of the Orcadian Basin, Scotland

2020 ◽  
Vol 57 (1) ◽  
pp. sjg2020-009
Author(s):  
Michael J. Newman ◽  
Jan L. den Blaauwen ◽  
Carole J. Burrow
Keyword(s):  
Middle Devonian ◽  
Leading Edge ◽  
Baltic Region ◽  
Head Region ◽  
Longitudinal Ridge ◽  
Orcadian Basin ◽  
First Time ◽  
Fin Spines

Articulated cheiracanthid acanthodians are relatively rare above the Dickosteus thrieplandi biostratigraphic zone in the Orcadian Basin, with Cheiracanthus peachi den Blaauwen, Newman & Burrow the only species identified to date. Here we describe two other taxa Fallodentus davidsoni nov. gen. et sp. and Markacanthus costulatus Valiukevičius from the Mey Flagstone Formation. F. davidsoni occurs at the base of the formation, in the Osteolepis panderi biostratigraphic zone, and is readily identified by its robust fin spines which have a wide longitudinal ridge on each side below the groove separating the leading edge from the side of the spine. The taxon is most similar to Homalacanthus concinnus (Whiteaves) from the younger (Frasnian) Escuminac Formation in Quebec, Canada. The unique specimen of Markacanthus costulatus is from the top of the Mey Flagstone Formation. This taxon was previously only known from isolated scales from the upper Narva and Aruküla Regional Stages of the east Baltic region. The dorsoventral preservation of the head region in the F. davidsoni specimens reveals clearly the position of the ceratohyal cartilages in a cheiracanthid, as well as showing for the first time that there is a basihyal cartilage anterior to the ceratohyals.

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