health care workers (hcw) are at high risk of occupational exposure from blood-borne pathogens. the most important pathogens that can be transmitted to hcw are hiv with prevalence of 2.24 per 100000, hbv with prevalence of 2.3%, and hcv with prevalence of 0.2% in iran. most of this occupational transmission can be prevented through standard precautions reducing exposure. these precautions, howe...

Visual search often involves searching the same environment, consecutively, for a number of different targets. Here we investigate the extent to which search benefits from such previous exposure. In the experiment participants searched the same display consecutively for two different targets. Manual responses were faster in the second search than the first search regardless of whether a target ...

Participants made visual lexical decisions to upper-case words and nonwords, and then categorized an ambiguous N-H letter continuum. The lexical decision phase included different exposure conditions: Some participants saw an ambiguous letter "?", midway between N and H, in N-biased lexical contexts (e.g., REIG?), plus words with unambiguous H (e.g., WEIGH); others saw the reverse (e.g., WEIG?, ...

In experiments with an unlimited viewing time, we were able to isolate specific stimulus factors that lead to the word-superiority effect. We discovered that advantages of words over nonwords, and words over single letters, are caused by different factors. The word-nonword effect was found in a variety of circumstances, such as with small type, low contrast, or a simultaneously present mask. Th...

Objective: Verbal fluency is a cognitive function that can be easily assessed in bedside and provide useful data for clinical assessment of a variety of cognitive functions. We decided to provide a standardized test for the assessment of verbal fluency in Persian language, including both phonemic and semantic fluency subtests.  Method: First, three letters (P, D, and Sh) and three categories (...

In important cases, the Supreme Court has limited the scope of "substantive due process" by reference to tradition, but it has yet to explain why it has done so. Due process traditionalism might be defended in several distinctive ways. The most ambitious defense draws on a set of ideas associated with Edmund Burke and Friedrich Hayek, who suggested that traditions have special credentials by vi...

In adaptive control problems one may drop the requirement of identifying the true system in order to simplify the problem of control. It will be shown that in the adaptive LQ control problem this does not at all lead to an easier problem. A MS Subject Classijication: 93C40. Kqvwords: Adaptive LQ control, Closed-loop identification, Certainty equivalence.

WiMAX networks are the most suitable for E-Learning through their Broadcast and Multicast Services at rural areas. Authentication of users is carried out by AAA server in WiMAX. In E-Learning systems the users must be forced to perform reauthentication to overcome the session hijacking problem. The reauthentication of users introduces frequent delay in the data access which is crucial in delayi...