首页
登录
职称英语
Low speed bicycle crashes can badly injure—or even kill—children if they fal
Low speed bicycle crashes can badly injure—or even kill—children if they fal
游客
2024-02-23
56
管理
问题
Low speed bicycle crashes can badly injure—or even kill—children if they fall onto the ends of the handlebars. So a team of engineers is redesigning the humble handlebar in a bid to make it safer.
Kristy Arbogast, a bioengineer at the Children’s Hospital of Philadelphia in Pennsylvania, began the project with her colleagues after a study of serious abdominal injuries in children in the past 30 years showed that more than a third were caused by bicycle a accidents. "The task was to identify how the in juries occurred and come up with some countermeasures," she says.
By interviewing the children and their parents, Arbogast and her team were able to reconstruct many of the accidents and identified a common mechanism responsible for serious injuries. They discovered that most occur when children hit an obstacle at slow speed, causing them to topple over. To maintain their balance they turn the handlebars through 90 degrees—but their momentum forces them into the end of the handlebars. The bike then falls over and the other end of the handlebars hits the ground, ramming it into their abdomen.
The solution the group came up with is a handgrip fitted with a spring and damping system. The spring absorbs up to 50 per cent of the forces transmitted through the handlebars in an impact. The group hopes to commercialize the device, which should add only a few dollars to the cost of a bike. "But our task has been one of education because up until now, bicycle manufacturers were unaware of the problem, says Arbogast.
The team has also approached the US Consumer Product Safety Commission to try to persuade manufacturers to adopt the new design. A decision is expected later this year. [br] Why the manufactures did not accept the new design.
选项
答案
Bicycle manufactures were unaware of the problem.
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3476104.html
相关试题推荐
Peopleappeartobeborntocompute.Thenumericalskillsofchildrendevel
Peopleappeartobeborntocompute.Thenumericalskillsofchildrendevel
Peopleappeartobeborntocompute.Thenumericalskillsofchildrendevel
Peopleappeartobeborntocompute.Thenumericalskillsofchildrendevel
Peopleappeartobeborntocompute.Thenumericalskillsofchildrendevelo
Childrenmodelthemselveslargelyontheirparents.Theydosomainlythroug
Childrenmodelthemselveslargelyontheirparents.Theydosomainlythroug
Childrenmodelthemselveslargelyontheirparents.Theydosomainlythroug
Childrenmodelthemselveslargelyontheirparents.Theydosomainlythroug
Childrenmodelthemselveslargelyontheirparents.Theydosomainlythroug
随机试题
Weallknowwhatanadvertisementis;it’s【B1】______messagethatannounce
AGrassrootsRemedyMostofusspendourlivesseekin
[originaltext]EducationexpertssayAfrica’sgrowinghighereducationsyste
下图所示为()设计模式,适用于(请作答此空)。 A.有多个对象可以处理一个
大型项目可能包括一些超出单个项目范围的工作。项目范围是否完成以在( )中规定的
四十岁经产妇,近2年痛经并逐渐加重,伴经量增多及经期延长,届时需服强止痛药。妇科
()是消费者权益保护工作的最高决策机构,负责制定消费者权益保护工作战略、政
2002年6月到2007年6月,网民的年平均增长数约为()。A.1298
在共产主义社会,人们精神境界极大提高,每个人自由而全面的发展,对个人消费品实行“
根据下列国内生产总值表(单位:亿元)回答以下题。 社会总投资I的金额
最新回复
(
0
)