منابع مشابه
A cell's sense of direction.
In eukaryotic cells directional sensing is mediated by heterotrimeric guanine nucleotide-binding protein (G protein)-linked signaling pathways. In Dictyostelium discoideum amoebae and mammalian leukocytes, the receptors and G-protein subunits are uniformly distributed around the cell perimeter. Chemoattractants induce the transient appearance of binding sites for several pleckstrin homology dom...
متن کاملOn Systems with Sense of Direction
For a system with Sense of Direction, there are several possible consistent coding functions c and corresponding decoding functions d. Thus, it is desirable for a given system to identify, among all the couples (c; d) which are Sense of Direction, those who have additional properties. In fact, by using such properties, the solution of problems in a system could be further improved without any m...
متن کاملMinimal Sense of Direction in Regular Networks
A network is said to have Sense of Direction when the port labeling satisses a particular set of global consistency constraints. In this paper we study the link between the topology of a system and the number of labels that are necessary to have a Sense of Direction in that system. We consider systems whose topology is a regular graph and we study the relationship between structural properties ...
متن کاملDistributed Objects with Sense of Direction
An object system consists of a collection of objects and their relations; each object has a state (e.g., local variables) and a behavior (set of actions it may execute) and its global behavior is described in terms of interactions between its objects. When dealing with object systems, the manipulation of names is crucial to such an extent that an objects has been defined as “any entity in a sys...
متن کاملCompanyTOPOLOGICAL CONSTRAINTS FOR SENSE OF DIRECTION
Received (received date) Revised (revised date) Communicated by Editor's name ABSTRACT In a distributed system, each entity has a label (port number) associated to each of its neighbors. It is well known that if the labeling satisses a global consistency property called Sense of Direction, the communication complexity of many distributed problem can be greatly reduced. This property is assumed ...
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: Science
سال: 1892
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.ns-20.513.318-b