Tag: "rotation" at biology news

Tomorrow's super robots may owe their mobility to a cockroachs legs today

...assumptions for the model include: (1) the axis of rotation for the leg is constant during torsion and (2) the joint material can be approximated using a lumped-parameter element with uniformly distributed linear viscoelastic properties. The SDM process allowed an integration of a range of desired impedance i...

Physics tip sheet #29 October 23, 2002

...lable energy and the rest stops. In this case, the rotation of the face uses up so much energy, there is none left to keep the coin moving above the table and the whole process comes to a sudden halt. Journal article: http://link.aps.org/abstract/PRE/v66/e045102 4) Neutrinos away! J. Detwiler, G. Gratta, ...

Organic & Biomolecular Chemistry

...ceptor substituted molecular motor: unidirectional rotation driven by visible light. Ben Feringa, Groningen, The Netherlands A new synthesis of porphobilinogen analogues, inhibitors of hydroxymethylbilane synthase Finian Leeper, Cambridge, UK Non-steady-state kinetic study of the SN2 reaction between p-n...

Fluid flow technology takes a cue from fast-swimming sharks

...e size of the riblets and the rotation of spiraling areas of fluid known as vortices are both important factors. The optimal arrangement, Koeltzsch said, is when the distance between the peaks of the riblets is half the diamet...

IFDC innovative technology increases farmers' agricultural productivity, maintains resource base

...(green) manure, fodder crops, mixed cropping, crop rotation and agroforestry can improve the availability and quality of organic matter. The technologies lead in time to improved fertilizer use efficiency." The new approach increases the accessibility of fertilizer for farmers, raises the agricultural product...

Wolf Prize shared by Texas A&M, Missouri researchers

... died in 1981. The Wolf Prize is given annually in rotation among five areas: agriculture, chemistry, mathematics, medicine and physics. "Both scientists exemplify how devotion to basic research in agriculture can lead to practical outcomes that impact both animal production and human health and well-...

In a noisy world, how can the senses project and receive information at the same time?

... a standing position on a holder that allowed free rotation of the animal. To allow for silent stridulation, the left wing of the crickets was removed. When recording false stridulation, the cricket was placed upside down in a Plasticene well and its ventral cuticle was removed to expose the abdominal and tho...

Study provides new insights into the functional neuroanatomy of motor imagery

...red to underlie cognitive functions such as mental rotation of body parts. It is unclear whether a motor execu...ance. However, some neuroimaging studies on mental rotation or mental operations have successfully evaluated behavioral performance without involving any motor ...

New study: percentage of babies born with intestinal birth defect growing in U.S., N.C.

...with gastroschisis, the intestines develop and the rotation occurs, doctors believe, but the vital organs do not move into the abdominal cavity that is supposed to hold them. For some reason, the intestines also tend to be somewhat shorter than average. Unlike another birth defect known as omphalocele, in whi...

Physics tip sheet #37

...cur because the tip of the vortex is unstable when rotation is fast. The air bubble is usually sucked straight down the drain after detaching. The flow around the plughole itself has some unusual behavior. Most of the water on the bottom of the tub flows toward the hole but about one centimeter before the hol...

Why genetic diversity matters

...diseases by the astute use of crop diversity. Crop rotation makes use of diversity in time. Planting mixtures or variable varieties makes use of diversity in space. And both have a place on even the most modern farms. These are just some of the topics that will be covered by participants from developed and de...

Male flesh flies high-speed pursuit of females

...dual video frames and measured the precise angular rotation of each fly's head. By examining different facets of the compound eyes, the entomologists measured the spacing of the optical axes and were able to distinguish between the high-resolution and the low-resolution parts of the compound eyes. The scienti...

Traditional Christmas snack under threat

... of seeds that can be harvested and implementing a rotation system with alternating areas where harvesting would not take place. Planting of viable seeds or nursery-grown seedlings could also increase the supply of young trees within natural populations, and control of seed eaters and large herbivores could ...

Reverse-direction movement of a molecular motor

...ment of the tip of a lever depends on the angle of rotation and the direction in which the lever projects away from the axis of rotation. The difficult part was to rotate the direction of the lever arm in precisely the right orientation without creating sterical clashes between domains and compromising the st...

Ocean dye to help Rutgers scientists trace Hudson River's path miles into the Atlantic

...nd photosynthesis in microscopic ocean plants. The rotation of the earth will figure in the model because it causes ocean water in the northern hemisphere to turn to the right. This phenomenon, called the Coriolis effect, drives the plume up against the New Jersey coast. In previous testing, water from ...

Crop rotation may help wait out soil pathogen deadly to pumpkins

...ns or other crops susceptible to P. capsici. "Crop rotation is already being used by pumpkin growers as an imp...ere grown prior to pumpkin." In order to make crop rotation a successful solution to waiting out the pathogen, a critical question remains to be answered: How l...

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