首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Low speed bicycle crashes can badly injure—or even kill—children if they fall onto the ends of the handlebars. So a team of engi
Low speed bicycle crashes can badly injure—or even kill—children if they fall onto the ends of the handlebars. So a team of engi
admin
2010-10-14
85
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.
Why are some engineers trying to improve the handlebars?
选项
答案
They may kill children.
解析
转载请注明原文地址:https://kaotiyun.com/show/Fw87777K
0
大学英语四级
相关试题推荐
Throughouthistory,peoplehavebeenthevictimsofpickpockets.Today,pickpocketingisoneoftilemostrapidlyincreasingcri
Throughouthistory,peoplehavebeenthevictimsofpickpockets.Today,pickpocketingisoneoftilemostrapidlyincreasingcri
A、At10o’clock.B、At12o’clock.C、At14:30.D、Itisnotmentioned.A根据女士说的话Iwasherebytenthismorning可得知她的上班时间。
NextMondayisWorldHealthDay,【S1】______bytheWorldHealthorganization.Theobjectivechosenforthisyearistogetpeople【
Hereisapopularbeliefamongparentsthatschoolsarenolongerinterestedinspelling.Thisis,however,a【S1】______.Noscho
A、HequitteachinginJune.B、Hehasleftthearmyrecently.C、Heopenedarestaurantneartheschool.D、Hehastakenoverhisb
Almost20,000whaleshavebeenslaughteredsincea【B1】______oncommercialwhalingwasintroducedin1986andthedeath【B2】______
A、Theperformancerequiredforacertainjob.B、Therequiredbehavior,knowledgeandskills.C、Thetrainingcontentsandmethods
Afterretiringfrom30yearsofteaching,EthbellPeppercouldeasilyhavedecidedtositbackand【B1】______andenjoyapeaceful
Afterretiringfrom30yearsofteaching,EthbellPeppercouldeasilyhavedecidedtositbackand【B1】______andenjoyapeaceful
随机试题
高血压引起脑出血主要发生于内囊和基底节区。()
随着互联网的发展,大数据时代的到来,人们获取知识的方式发生了深刻的变化。越来越多的学生习惯利用电脑、智能手机等终端设备从互联网上下载和搜索自己喜欢的文章、视频来阅读和学习。这说明()。①大众传媒具有传递、共享的强大功能
表达式对话框中,ListedExpressions下拉列表中包括哪些类型?
关于半乳糖血症的描述,正确的是
下列属于暑邪性质和致病特点的是
男,21岁。畏寒,高热,咳嗽伴左胸痛5天。查体:BP80/50mmHg。心率120次/分。胸部X线片见左肺下叶大片状致密影。实验室检查:血WBC12.2×109/L,N0.87。该患者最可能感染的病原体是
在实际估价中,设定的标准深度通常是路线价区段内临街各宗土地的临街深度的()。
下列关于申请QDⅡ资格的机构投资者应当符合的条件的说法中,有误的是()。
操作风险系统缺陷方面主要表现为()。
对竞争的目的理解正确的是()①竞争的目的是为了开发潜能,激发学习热情,提高工作效率②竞争的目的是为了超越别人,唯我独尊③竞争的目的就意味着“你死我活”④竞争的目的是为了超越自我,取长补短,共同进步
最新回复
(
0
)