Several views on man-machine interaction are possible to measure usability attributes: (1) the interaction-oriented view, (2) the user-oriented view, (3) the product-oriented view and (4) the formal view. Two different possibilities of measurement within the product-oriented view are introduced in this paper. Different types of user interfaces can be described and differentiated by the concept ...

I recently completed a general audience book on the P versus NP problem [1]. Writing the book has forced me to step back and take a fresh look at the question from a non-technical point of view. There are really two different P versus NP problems. One is the formal mathematical question, first formulated by Steve Cook in 1971 [2] and listed as one of the six unresolved millennium problems by th...

OBJECTIVES To evaluate the efficacy of fidaxomicin treatment, which has a limited effect on the normal gut flora, compared with vancomycin and metronidazole treatment in Clostridium difficile infections (CDIs). METHODS A systematic literature review was conducted in July to August 2011 and updated in July 2013. For fidaxomicin versus vancomycin, efficacy was evaluated using meta-analysis of d...

Since the country’s post-1978 reforms, China has experienced sweeping changes in the principles of remuneration and distribution of benefits and opportunities. These changes have brought about corresponding— and generally increased—inequalities among the citizenry. The fact of these inequalities is not in dispute. But how do ordinary Chinese citizens view them? What do they think of the country...

Mailing address: Pedro José Negreiros de Andrade • Francisco Holanda, 992/1101 Dionisio Torres 60130-040 Fortaleza, CE Brazil E-mail: [email protected], [email protected] Manuscript received May 01, 2010; revised manuscript received July 14, 2010; accepted August 13, 2010.