منابع مشابه
Cocoon care in the social spider Stegodyphus dumicola (Eresidae)
The evolution of cocoon care in Stegodyphus dumicola seems to be influenced by a high migration rate between the colonies. Intruding conspecifics are tolerated by resident spiders and discriminating behaviour is observed only under special conditions. To prevent social parasitism, females care only for their own cocoons and not for those of other females from the same or foreign colonies. I des...
متن کاملHost manipulation by an ichneumonid spider ectoparasitoid that takes advantage of preprogrammed web-building behaviour for its cocoon protection.
Host manipulation by parasites and parasitoids is a fascinating phenomenon within evolutionary ecology, representing an example of extended phenotypes. To elucidate the mechanism of host manipulation, revealing the origin and function of the invoked actions is essential. Our study focused on the ichneumonid spider ectoparasitoid Reclinervellus nielseni, which turns its host spider (Cyclosa arge...
متن کاملCocoon within an abdominal cocoon
Intestinal obstruction is a fairly common surgical emergency that usually occurs due to herniae, adhesions, or bands. Rarely, uncommon causes such as an abdominal cocoon are encountered, where part or all of the small intestine is encased within a thin membrane. We report one such case of abdominal cocoon, in whom, further encasement of the distal ileum was seen within a separate membrane.
متن کاملUsing Reinforcement Learning to Spider the Web Efficiently
Consider the task of exploring the Web in order to find pages of a particular kind or on a particular topic. This task arises in the construction of search engines and Web knowledge bases. This paper argues that the creation of efficient web spiders is best framed and solved by reinforcement learning, a branch of machine learning that concerns itself with optimal sequential decision making. One...
متن کاملUsing Reinforcement Learning to Spider the Web Eeciently
Consider the task of exploring the Web in order to nd pages of a particular kind or on a particular topic. This task arises in the construction of search engines and Web knowledge bases. This paper argues that the creation of eecient web spiders is best framed and solved by reinforcement learning, a branch of machine learning that concerns itself with optimal sequential decision making. One str...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Scientific American
سال: 1889
ISSN: 0036-8733
DOI: 10.1038/scientificamerican08311889-130