We study the qualitative properties of degenerate diiusion equations used to describe dispersal processes in population dynamics. For systems of interacting populations, the forms of the diiusion models used determine if the population will intermix or remain disjoint (segregated). The dynamics and stability of segregation boundaries between competing populations is analyzed. General population...

introduction: information on the sleepiness and sleep quality is limited for asians. this study was conducted to determine the prevalence of sleepiness and sleep quality among the adult population in iran. materials and methods: this is a descriptive and explorative design study in which 1100 participants randomly selected from the kerman city population in south –east of iran. using two questi...

age related skin disorders due to structural and functional changes in the skin of the elderly may increase health care costs. as a result of an increase in the number of aging population in iran, provision of dermatology services to the elderly group due to the limitation of resources and the high cost of those services will be a challenge for the health care system. moreover, by increasing th...

Introduction: The existence of sexual dimorphism in human skeletons especially skull and its medico-legal importance had long been studied [3] [2,1]. This study has investigated the existence of sexual dimorphism in cranial dimensions of Nigerian population. Methods: A total of 100 adult dry skulls, (78 males, 22 females) free from damage and deformity fully ossified from Departments of Ana...

background: the goal of the present work was to determine frequencies of different finger patterns of a population in hamadan (one of the western cities of iran) in 1997. methods: in a cross-sectional study, the .prints of the first phalanx of both hands of 717 randomly selected hamadan students (i88 men, 529 women) have taken, by using standard method (stamp ink). the fingerprints were classif...

Background and aims: Hearing loss (HL) happens due to the genetic or environmental causes or both. Risk factors include congenital infections and congenital deformities of auricle and ear duct. The present study was performed to briefly explain the genetics, molecular biology and epidemiology of HL in Middle East especially in Iran. Methods: An intense an...

The majority of diseases caused by air pollution, such as asthma and allergies, are caused by pathogenic bacteria, which are transmitted through bioaerosols. Bacteria and fungi are the main sources of hospital infections causing the majority of diseases and cases of mortality. The aim of this study was to determine the ratio of indoor to outdoor fungi concentration, the effect of population den...

objective of this study was determining of the hamadanian young couples about family size, sex ratio and birth order of their asked children. the population of this study was the young men and women that were imminent of marriage, refereed to marriage offices as well as hygienic and therapeutic centres in hamadan city. this was a cross sectional descriptive study and has been done by using ques...

the aim of the current investigation was to evaluate the sedentary lifestyle of the polish population and its link with prolonged sitting in light of individual and environmental factors.the sample consisted of 1505 polish people between 18 and 64 years old. the computer-assisted telephone interview (cati) survey was conducted with the polish version of international physical activity questionn...