objective: this study aimed to investigate the verbal memory and working memory impairment in healthy siblings of patients with schizophrenia.  methods: the purpose of this study was to compare cognitive deficits in siblings of the patients with schizophrenia and control group. a total of 35 unaffected siblings of patients with schizophrenia were selected from the relatives of the patients refe...

introduction: the purpose of this in vitro study was to compare the accuracy of the new electronic apex locator raypex5 with radiography for working length determination of straight and curved root canals. materials and methods: twenty straight and single canals of maxillary central teeth and twenty curved mesiobuccal canals of mandibular molar teeth were used. access cavities were prepared and...

ôbjective: working women are predisposed to some psychiatric symptoms or disorders due to their life styles or working conditions such as long working hours, being away from their children during the day, and having various roles as an employee, a spouse, mother and a housekeeper, which creates daily stress, feelings of guilt, anxiety, dysphoric mood or interpersonal problems, all of which may ...

background: residents play an important role in the delivery of hospital care. they regularly work overnight, in emergency situations and with workload and stress which can affect their performance and quality of working life (qwl). this study explores the qwl and its contributory factors in residents working at hospitals affiliated with tehran university of medical sciences (tums), tehran, ira...

Users of Social Network Sites (SNSs) spend considerable amounts of hours per day exchanging (consuming or sharing) information and using services provided by such platforms. However, nothing comes for free. SNSs survive at the expense of the information that users’ upload to their profiles, and the knowledge derived from their on-line behavior. Discovering hidden knowledge in social networks is...

Aotus is a platyrrhine primate that has been classically considered to be nocturnal. Earlier research revealed that this animal lacks a color vision capacity because, unlike all other platyrrhine monkeys, Aotus has a defect in the opsin gene that is required to produce short-wavelength sensitive (S) cone photopigment. Consequently, Aotus retains only a single type of cone photopigment. Other ma...

Addiction's biological basis has been the focus of much research. The findings have persuaded experts and the public that drug use in addicts is compulsive. But the word "compulsive" identifies patterns of behavior, and all behavior has a biological basis, including voluntary actions. Thus, the question is not whether addiction has a biology, which it must, but whether it is sensible to say tha...