OBJECTIVES Many randomised trials in surgery suffer from recruitment rates that lag behind projected targets. We aim to identify perceived barriers to recruitment among these pioneering trials in the field of head and neck cancer surgery. DESIGN Recruiting centres to all three trials (Selective Elective Neck Dissection (SEND), Positron Emission Tomography (PET)-Neck and Hyperbaric Oxygen in t...

BACKGROUND Eat for Life, a multicomponent intervention to increase fruit and vegetable (F & V) consumption among African Americans, is delivered through African American churches. METHODS Fourteen churches were randomly assigned to one of three treatment conditions: 1) comparison; 2) culturally-sensitive multicomponent intervention with one phone call; and 3) culturally-sensitive multicompone...

Decision making with varying kinds of preferences simultaneously is pervasive in realities. In such sights it is essential to know the interaction among the kinds of preferences and the general principles of reasoning with the kinds of preferences. In this paper, we introduce MKPL: a many-kinds-preferences logic, to formalize four kinds of preference. Firstly, we consider four kinds of preferen...

BACKGROUND Despite the effects of midwives on the health of family and community through promotion of maternal and child health indicators, they are not in the position of professional decision making. Therefore, this study was aimed to determine the barriers to achieve professional management positions by midwives. MATERIALS AND METHODS This study was a descriptive and cross-sectional study....

D URING the summer of 1950 a number of living specimens were collected during studies on temperature regulation in Alaskan mamma1s.l These animals were brought back to Wisconsin and maintained in captivity, a number being still alive more than two years after capture. Since an adequate diet is often essential for successful maintenance, some systematic observations on food preference in terms o...

For the Edwards-Anderson Ising spin-glass model in three and four dimensions (3d and 4d) we have performed high statistics Monte Carlo calculations of those free-energy barriers F q B which are visible in the Parisi overlap parameter q. The calculations rely on the recently introduced multi-overlap algorithm. In both dimensions, within the limits of lattice sizes investigated, these barriers ar...

background : participation of iranian women with a family history of breast cancer in breast cancer screening programs is low.this study evaluates compliance of women having a family history of breast cancer with clinical breast exam (cbe) according to stage of trans theoretical model (ttm) and health belief model (hbm).material and methods : in this cross-sectional study, we used persian versi...

the purpose of the study was assessing rural tourism’s development barriers in soltanieh, zanjan province. a descriptive–correlation survey approach was used in this study. the study population consisted of local people, government experts and tourists. data was collected by eight section closed questionnaire. reliability and validity of questionnaire were determined by investigating the at...