Modeling Terrain Park Jumps: Linear Tabletop Geometry May Not Limit Equivalent Fall Height

2012 ◽  
pp. 120-135 ◽  
Author(s):  
Andrew D. Swedberg ◽  
Mont Hubbard
Keyword(s):  
Fall Height

scholarly journals Factors influencing the injury severity score and the probability of survival in patients who fell from height

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Masashi Fujii ◽  
Tsutomu Shirakawa ◽  
Mami Nakamura ◽  
Mineko Baba ◽  
Masahito Hitosugi
Keyword(s):  
Regression Analysis ◽  
Mortality Rate ◽  
Confidence Interval ◽  
Injury Severity Score ◽  
Survival Probability ◽  
Severity Score ◽  
Hospital Care ◽  
Injury Severity ◽  
Body Position ◽  
Fall Height

AbstractIn Japan, falls from height result in the second highest trauma mortality rate after traffic motor vehicle collisions and the highest trauma-related mortality rate amongst young people. We aimed to identify factors that worsen injury severity and lower survival probability of patients who fell from height and to contribute to the improvement of their prehospital and in-hospital care. This retrospective analysis retrieved hospital records of 179 patients aged ≥ 15 years who were transported to our hospital after a fall from height during April 2014–March 2020. On multiple regression analysis, fall height ≥ 5 m more significantly resulted in higher the injury severity score. Logistic regression analysis revealed that fall height ≥ 5 m with the reference of 2–3 m significantly resulted in lower the survival probability with odds ratio (95% confidence interval) of 0.10 (0.02–0.55). Using ‘feet-first’ as the reference body position, the odds ratios (95% confidence interval) of survival for those who impacted the surface on the lateral or dorsal regions were 0.11 (0.02–0.64) and 0.17 (0.03–0.99), respectively. Collecting information on the abovementioned factors at pre-hospitalisation may facilitate prompt diagnosis and treatment. These results may help improve prehospital and in-hospital care, avoiding preventable trauma deaths.

scholarly journals Culverts in paved roads as suitable passages for Neotropical fish species

2012 ◽  
Vol 10 (4) ◽  
pp. 763-770 ◽  
Author(s):  
Sergio Makrakis ◽  
Theodore Castro-Santos ◽  
Maristela Cavicchioli Makrakis ◽  
Ricardo Luiz Wagner ◽  
Maurício Spagnolo Adames
Keyword(s):  
Fish Passage ◽  
Fish Movement ◽  
Upstream Migration ◽  
Migratory Species ◽  
Neotropical Fish ◽  
Potential Barriers ◽  
Medium Risk ◽  
Fall Height ◽  
Additional Monitoring ◽  
Spawning Success

Improperly installed or poorly maintained culverts can pose a serious threat to fish by disrupting their habitat and endangering spawning success. Road culverts that are not designed for fish passage frequently can become obstacles. This can be especially problematic for migratory species, but can lead to fragmentation of resident populations as well. This study evaluated 40 culverts of 29 sites within a 25-km radius from Toledo city, Paraná State, southern Brazil, with respect to their likely effects on movement of the local ichthyofauna. We collected data on the shape and length of culverts, culvert material, waterfall height, water column depth, slope, and estimated flow velocity. Culverts were categorized by level of barrier risk for upstream migration: high, medium, low, and impassable, as well as the type of barrier posed (fall height, depth, length and velocity). Most of culverts analyzed were considered potential barriers to fish movement, with 45% classified as impassible, 45% as high risk, 10% as medium risk, and no culverts as low risk. Brazilian culverts as fishways will require additional monitoring and studies to corroborate the premises proposed in the present study. Road culvert projects that are properly built and maintained will be able to simultaneously improve function of roadways and protect fish populations.

scholarly journals Field Determination of the Specific Input Characteristics to Calculate the Value of C Factor of Time-variable Crops for the Revised Universal Soil Loss Equation (RUSLE)

2013 ◽  
Vol 1 (No. 1) ◽  
pp. 10-15 ◽  
Author(s):  
Jakubíková Alena ◽  
Tippl Miloslav Janeček and Martin
Keyword(s):  
Soil Loss ◽  
Canopy Cover ◽  
Agricultural Crops ◽  
Growth Phases ◽  
Specific Input ◽  
Rain Drops ◽  
Basic Characteristics ◽  
Runoff And Soil Loss ◽  
Fall Height

To determine specific characteristics necessary for the computation of the C factor in RUSLE for timevariable crops, measurements were carried out in fields with selected agricultural crops grown by conventional practices. Sloping plots on an experimental area in Třebsin locality and farm fields were used to measure surface runoff and soil loss by erosion in conditions of natural and simulated rainfall. Basic characteristics to compute the C factor were determined in the particular growth phases of selected crops – sunflower, flax, poppy and rape. Effective root mass, canopy cover and fall height of rain drops were measured.

scholarly journals Protective arm movements are modulated with fall height

2020 ◽  
Vol 99 ◽  
pp. 109569 ◽  
Author(s):  
James Borrelli ◽  
Robert Creath ◽  
Mark W. Rogers
Keyword(s):  
Arm Movements ◽  
Fall Height

scholarly journals Seismic Analysis of the Detachment and Impact Phases of a Rockfall and Application for Estimating Rockfall Volume and Free‐Fall Height

2019 ◽  
Vol 124 (11) ◽  
pp. 2602-2622 ◽  
Author(s):  
G. Le Roy ◽  
A. Helmstetter ◽  
D. Amitrano ◽  
F. Guyoton ◽  
R. Le Roux‐Mallouf
Keyword(s):  
Seismic Analysis ◽  
Free Fall ◽  
Fall Height

Influence of wet surfaces and fall height on pediatric injury risk in feet-first freefalls as predicted using a test dummy

2005 ◽  
Vol 27 (1) ◽  
pp. 31-39 ◽  
Author(s):  
Ernest Deemer ◽  
Gina Bertocci ◽  
Mary Clyde Pierce ◽  
Fernando Aguel ◽  
Janine Janosky ◽  
...  
Keyword(s):  
Injury Risk ◽  
Pediatric Injury ◽  
Fall Height

scholarly journals Research in the Impact of Dynamic Loads for the Development of Pentice Designs when Sinking Skip Shafts

2019 ◽  
Vol 105 ◽  
pp. 01056
Author(s):  
Vladimir Pershin ◽  
Aleksandr Kopytov ◽  
Ahmed Wetti
Keyword(s):  
Truss Structures ◽  
Underground Structures ◽  
Air Stream ◽  
Metal Sheets ◽  
Support Element ◽  
Vertical Division ◽  
Shaft Sinking ◽  
The Impact ◽  
Fall Height ◽  
Stream Direction

In order to protect workers engaged in shaft sinking works artificial protective equipment (buntons) with the support element from powerful I-beams or truss structures are used. They have to withstand enormous push loading, be strong, simple in design, have less labor input during construction and dismantling. Under shaft sinking in case of skip operational winding performance, a protective bunton can be exposed to the rock mass flow in the event of an emergency full skip run. To substantiate the variables and develop the design of pentices when sinking an active hoisting shaft, the skip falls time dependence on the changes in its fall height, taking into account the velocity and the air stream direction in the shaft, was established using mathematical modeling. LLC “SibGorComplexEngineering” together with the Department of Construction of Underground Structures and Mines of T.F. Gorbachev Kuzbass State Technical University have developed several new designs variants of protective buntons for vertical shafts sinking in case of operational winding performance. It is a Z-shaped structure of the offset in height, parallel to each other of upper and lower protective buntons, bushed with sloped reflective metal sheets and it is interconnected by a vertical division wall.

scholarly journals Brief Communication on Parents’ Perception towards Favourite Play Equipment, Satisfaction Level and Safety of Public Climbing Equipment in Malaysia

2018 ◽  
Vol 7 (4.15) ◽  
pp. 257
Author(s):  
Cheah Kah Ling ◽  
Raja Ahmad Azmeer ◽  
Mohd Shahrizal Dolah ◽  
Saiful Hasley ◽  
Jusang Bolong
Keyword(s):  
Public Health ◽  
Free Fall ◽  
Health Concern ◽  
Satisfaction Level ◽  
Public Health Concern ◽  
Safety Level ◽  
Equipment Safety ◽  
Playground Safety ◽  
Urban Recreation ◽  
Fall Height

Public playground injuries caused by unsafe climbing equipment is a public health concern. This study aims to measure Malaysian parents’ perception towards their children’s favourite play equipment and satisfaction level on public equipment safety. A self-administered survey was employed among 50 Malaysians citizen, aged between 18 to 45 years. Data was descriptively analysed using SPSS version 21.0. The results showed that climbing equipment was favourite playing equipment among children. Furthermore, our study revealed that (90%) of parents were dissatisfied with public climbing equipment. We found that while (92%) of the parents agreed that safety levels of the climbing equipment should be improved. In addition, the study revealed that more than three quarters of respondents agreed to reduce free fall height, improve product materials, focus on reducing falls, and implement effective safety inspection including regular maintenance to improve the safety level of public climbing equipment. Results from this study could assist in advanced urban recreation safety for controlling injuries and regain parents’ trust on playground safety.  

Falls From Height, Facial Injuries and Fatalities: An Institutional Review

2021 ◽  
pp. 194338752110553
Author(s):  
Pasquale G Mollica ◽  
Ellie C McEwen ◽  
Gary R Hoffman
Keyword(s):  
Retrospective Cohort ◽  
Bone Fractures ◽  
Interdisciplinary Approach ◽  
Health Concern ◽  
Multiple Fractures ◽  
Facial Injuries ◽  
Institutional Review ◽  
Significant Public Health ◽  
Fall From Height ◽  
Fall Height

Study Design Retrospective cohort review. Objective To investigate the relationship between falls from height and facial injuries. Methods This is a retrospective cohort study, conducted over a 7-year period, of the medical records of all patients who presented to hospital for a maxillofacial injury following a fall from height. Fall heights were classified as low falls (1–3 m), high falls (3–10 m) and very high falls (≥10 m). Results A total of 111 patients with 218 facial bone fractures were identified (78 men, 33 women and mean age 50.3 years). High falls were the most common (n = 58, 52.3%). Multiple fractures were identified in 51 (46.0%) patients. Orbital and middle third fractures were the most prevalent. Nasal, mandible, bilateral and fractures involving more than one facial third, increased as fall height increased, as did the requirement for operative fixation. The majority of patients had an associated injury (n = 100, 90.1%) and overall mortality was 6.3%. Conclusions Falls from height are prevalent and there is a trend towards increased severity of facial injury, surgical intervention and associated morbidity as fall height increases. Falls from height are a significant public health concern and an important facet of maxillofacial trauma to recognise, as is the requirement for an interdisciplinary approach as they present to hospital.

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