I n our previous article about special-relativistic visualization,1 we described what the travelers from our highly developed civilization observed when they passed the Earth; now, they set out for the Cygnus X-1 binary system, which is roughly 6,000 light years away. The Cygnus X-1 system consists of a super giant variable star (HDE 226868) and a very compact object—presumably a black hole—wit...

conclusions both the lukewarm-water-soaked gauze and the hot pack techniques had significant effects on postoperative urinary retention and significantly reduced the need for urinary catheterization. using these two simple and cost-effective techniques for managing postoperative urinary retention is recommended. results respectively, 59.5%, 71.4%, and 7.1% of patients in the hot pack, the soake...

background the anesthesia planning is an important and determining factor in the amount of intraoperative hemorrhage, which can affect the rate of intraoperative and postoperative complications. objectives in this study we used two different anesthesia techniques in functional endoscopic sinus surgery (fess) and compared the amount of hemorrhage in the two groups. patients and methods in a sing...

introduction: pain or swelling caused by various stages of inflammation/infection of the pulp/periradicular area is called endodontic emergencies. determining the most effective method of emergency treatment is a challenging issue in endodontics. the goal of this study was to determine and compare the level of knowledge in general dentists and endodontists about endodontic emergency treatment p...

objective: sleep quality affects on physical and psychological well being and even academic functions of students. indeed, sleep quality has been suggested as an individual index of general health. among adolescents and young adults, poor sleep quality is common. the aim of this survey was to determine the sleep quality and its correlation with general health in 18-year-old iranian students. me...

objectives: the growing social and economical changes in the life style, have made abstract it difficult for many people to assume the responsibility of taking care of older adults in the family, consequently institutions become the inevitable option for many elderly adults. the aim of this study was to compare mental health of institutionalized and community living elderly adults in kermanshah...

in this note first by considering the notion of general fuzzy automata (for simplicity gfa), we define the notions of direct product, restricted direct product and join of two gfa. also, we introduce some operations on (fuzzy) sets and then prove some related theorems. finally we construct the general fuzzy recognizers and recognizable sets and give the notion of (trim) reversal of a given gfa....