air pollution is one of the most important problems in urban areas that always threaten citizen's health. photochemical smog is one of the main factors of air pollution in large cities like tehran. usually smog is not only a part of nature, but is being analyzed as an independent matter, which highly affects on the nature. it has been used as relationship between atmospheric elements such as te...

Triple-helical DNA can be formed by oligonucleotides that bind as third strands of DNA in a sequencespecific manner in the major groove in homopurine/homopyrimidine stretches in duplex DNA. Such triple helix-forming oligonucleotides have been used to inhibit gene expression by blocking transcription factor access to promoter sites in transient expression assays. In an alternative approach to ge...

Hybrid dynamical systems consist of piecewise defined continuous time evolution processes interfaced with some logical or decision making process. These switches between different evolutions are triggered if the continuous state of the system reaches thresholds in state space. In the present work we investigate hybrid systems forming a special type of dynamical systems, so-called strange billia...

Jackson is a branch chief in Headquarters Air Force Materiel Command. He teaches economics and management at the University of Phoenix Cincinnati campus. Silence falls upon the audience as the houselights dim. Three figures appear center stage. Demanding greater accountability, an aggravated politician lambastes bureaucrats for operating in a maze of outdated policy. A baron of business extols ...

A 89 year old woman was admitted with increasing confusion and difficulty in walking. Her left thigh was swollen, erythematous and had associated crepitus.

We suggest a simple sequential mechanism whose subgame perfect equilibria give rise to efficient networks. Moreover, the payoffs received by the agents coincide with their Shapley value in an appropriately defined cooperative game. D 2004 Elsevier B.V. All rights reserved.

in all engineering applications where solid surfaces slide on each other, friction plays an important role. it becomes even more important, particularly in metal forming processes where the two sliding materials are metallic. among forming processes, forging is an important process, because of improving material structure, mechanical properties and reducing production time. an inverse analysis ...