Science news articles about 'direction motion'

  • Engineers aim to solve 'burning' computer problem

    ... ," will also be explored. This concept proposes that devices could be engineered to convert non-equilibrium electrical activity into directed motion, allowing energy to be harvested from a heat ...
  • Crowd Forcing: Random Movement of Bacteria Drives Gears

    ... motion of tiny bacteria can be harnessed to turn much larger mechanical gears in a preestablished direction ... Brownian ratchet, in which arbitrary fluctuations generate directed motion to power tiny mechanical systems ...
  • Astronomers capture a rare stellar eclipse in opening scene of year-long show

    ... of the star and wedge-shaped structure show the direct motion over a month, yielding a measurement of the relative ... less than the mass of Earth altogether. "This is a fairly direct measurement of characteristics of a disk, in contrast to the usual ...
  • New microscope decodes complex eye circuitry

    ... their receptive fields in a particular direction; motion in the opposite (null-) direction inhibits activation. Starburst ... dendrites connected with it run in the direction opposite to the preferred direction of motion. "Ganglion cells prefer ...
  • Sleep problems more prevalent than expected in urban minority children

    ... sleep monitoring at home for five to seven days using actigraphy, an objective method of continuous, direct-motion monitoring used to measure sleep and awake ...
  • Tiny cell patterns reveal the progression of development and disease

    ... . These small communities of cells would undergo directional motion and form chiral alignment after a day ... and made us do hundreds of experiments." They found that the direction of motion depended on cell type — that normal ...
  • The forces of attraction: How cells change direction

    ... types in higher organisms are capable of implementing directed motion in response to the presence of certain chemical ... concentration gradients of a chemoattractant and change their migration direction after a change in the external stimulus. We have developed a so ...
  • Giving fluorescence microscopy new power to study cellular transport

    ... and reveal, for the first time, properties of diffusive and directed motion transport in living cells. Popescu ... scales, and ask at which scale the motion transitions from random to directed motion." Popescu said the multiplicity of scales ...
  • These bots were made for walking: Cells power biological machines

    ... screening or chemical analysis, since the bots' motion can indicate how the cells are responding to the environment. By integrating ... to enhance control and function, such as integrating neurons to direct motion or cells that respond to light. They are also working ...
  • Motorized microscopic matchsticks move in water with sense of direction

    ... '. Before now most research seeking to influence the direction of motion of microscopic components have had to use outside influences ... of micro-components of added complexity. "The ability to direct motion of these colloidal structures can form a platform ...
  • Cell 157: 420-432 (14-4-10)

    Cell 157: 420-432 Asymmetric friction of nonmotor MAPs can lead to their directional motion in active microtubule networks Scott Forth, Kuo-Chiang Hsia, Yuta Shimamoto and Tarun M. Kapoor

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