منابع مشابه
Cliff hangers
The peregrine falcon holds a special place in the minds of environmentalists and conservation biologists. The crash in its population throughout the 1950s and 60s was linked to the rapidly increasing use of agricultural organochlorine pesticides which led to a thinning of the birds’ eggshells and dramatic breeding failure. Since the widespread ban on the use of these chemicals, populations have...
متن کاملTemplet: a Markup Language for Concurrent Programming
In this paper we propose a new approach to the description of a network of interacting processes in a traditional programming language. Special programming languages or extensions to sequential languages are usually designed to express the semantics of concurrent execution. Using libraries in C++, Java, C#, and other languages is more practical way of concurrent programming. However, this metho...
متن کاملHabitat , the Templet for Ecological Strategies ?
The very etymology of Ecology, from the greek 'Qikos', 'the household', implies that ecologists should devote some attention to the 'house' or habitat of the population or community they are studying. However, as Charles Elton (1966) has so forcibly pointed out, 'definition of habitats, or rather lack of it, is one of the chief blind spots in Zoology'. Elton himself has provided us with a quali...
متن کاملAdjustable Autonomy Challenges in Personal Assistant Agents: A Position Paper
The successful integration and acceptance of many multi-agent systems into daily lives crucially depends on the ability to develop effective policies for adjustable autonomy. Adjustable autonomy encompasses the strategies by which an agent selects the appropriate entity (itself, a human user, or another agent) to make a decision at key moments when an action is required. We present two formulat...
متن کاملAdjustable versus non-adjustable sutures for strabismus.
BACKGROUND Strabismus, or squint, can be defined as a deviation from perfect ocular alignment and can be classified in many ways according to its aetiology and presentation. Treatment can be broadly divided into medical and surgical options, with a variety of surgical techniques being available, including the use of adjustable or non-adjustable sutures for the extraocular muscles. There exists ...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1909
ISSN: 0036-8733
DOI: 10.1038/scientificamerican09041909-164