From the same place that brought you the Robot Suit HAL comes the “motorized knee”.Designed by researchers at Japan's Tsukuba University, the device supports the flex(弯曲 ) of the knee, which enables a runner to use 30% less muscle power compared to running unassisted.
Coming in a kit (成套工具), the device consists of a small motor that helps flex the knee, a sensor that detects the knees' degree of flex, and a safety lever (杠杆)—all of which attach to the user's leg.The user is also forced to carry a backpack that holds a control unit and battery to power the motor.All up the device weighs around 5kg,which will probably lessen the performance benefits of wearing the device somewhat.In experiments runners wearing the device could jog at 7.5kmh, which is hardly anything special—but predictably they could do it for longer.
Curiously, the makers of the motorized knee say it isn't designed for the physically handicapped.Rather it is intended for people who want to run in a more efficient way.I can't help thinking this cuts down the potential market considerably.After all, most runners I know do it for the sake of their fitness.Wouldn't a device that is designed to do some of the work mean that someone would have to run for longer to receive the same fitness benefits?
Regardless, the research team expects to commercialize the kit within the next three years, by which time they also plan to have made the device significantly smaller and lighter.
To make sure that the device runs smoothly,________.
A.the user should be equipped with other related units |
B.the device should be improved through experiments |
C.the user shouldn't be physically handicapped |
D.the device should be smaller and lighter |
What is the special feature of the device according to the passage?
A.It helps its user run faster. |
B.It helps save physical strength. |
C.It adds more fun to running. |
D.It helps its user keep a good shape. |
In the author's opinion, the device________.
A.should specially serve the disabled |
B.won't be popular with people at all |
C.does harm to its user's health |
D.may not sell as well as expected |
Which of the following aspects of the device is NOT mentioned in the passage?
A.Its advantages. | B.Its components. |
C.Its weight. | D.Its price. |
In which column of a newspaper would this passage be found?
A.Science. | B.Health. |
C.Education. | D.Business. |