Claws for thought
نویسنده
چکیده
What are the early signs of use? There are no early signs. There are only obvious signs common to all long-term users. What can be spotted is the transition from non-user to addict (one episode is sufficient for diagnosis). For example, an early draft of a manuscript may read “We replicated and extended a classic finding within an established theoretical framework...”; a later SciagraTM-influenced draft, however, would translate this to “We show for the first time... and provide a novel explanation for...”
منابع مشابه
The design of a beautiful weapon: compensation for opposing sexual selection on a trait with two functions.
Male fiddler crabs, genus Uca, have one greatly enlarged claw with which they court females and threaten and fight other males. Longer claws are more effective signals but are thought to be less effective weapons because the relative closing force at the tip of the claw decreases with claw length. We studied claw morphology and fighting in Uca terpsichores and Uca beebei and found a mechanism t...
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Fiddler crab females have two small feeding claws while males have only one the other is enlarged and used as a weapon as well as a mate attraction signal. The study was conducted on the small intertidal fiddler crab Uca sindensis in the Abi estuary near Bandar Abbas on the Persian Gulf. Data were collected from September 2007 to August 2008 in order to cover a wide range of ecological conditio...
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Digital end organs composed of hard, modified epidermis, generally referred to as claws, are present in mammals and reptiles as well as in several non-amniote taxa such as clawed salamanders and frogs, including Xenopus laevis. So far, only the claws and nails of mammals have been characterized extensively and the question of whether claws were present in the common ancestor of all extant tetra...
متن کاملDesign and Analysis of a Wall-Climbing Robot Based on a Mechanism Utilizing Hook-Like Claws
Wall‐climbing robots have extensive applications, however, no effective adhesion system has been designed for robots deployed in high‐altitude, rough concrete buildings that are subjected to large wind loads and vibrations. This paper proposes a new suction method based on a mechanism utilizing hook‐like claws and presents the design of a robot system for inspecting roug...
متن کاملUltrasonographic and macroscopic comparison of the thickness of the capsule, corium, and soft tissues in bovine claws: an in vitro study
This study aimed to compare thickness of the capsule, corium, and soft tissues measured ultrasonographically and macroscopically in selected regions of bovine claws. A hundred and twenty claws (n = 120) of 15 healthy Holstein bovines were obtained. After cleaning the claws, ultrasonographic measurement of the capsule, corium, and soft tissues was performed while submerging the claws in a water ...
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ورودعنوان ژورنال:
- Current Biology
دوره 17 شماره
صفحات -
تاریخ انتشار 2007