in this paper, we introduce and study the prime, strongly prime,semiprime and irreducible fuzzy bi-ideals of a semigroup. we characterize thosesemigroups for which each fuzzy bi-ideal is semiprime. we also characterizethose semigroups for which each fuzzy bi-ideal is strongly prime.

in this paper we define ( , ) k  q -fuzzy h -sub hemirings, ( , ) k  q -fuzzy h -ideals, ( , ) k  q - fuzzy     h -bi-ideals and ( , ) k  q -fuzzy h -quasi-ideals. we characterize h -hemiregular and h -intrahemiregular hemirings by the properties of their     ( , ) k  q -fuzzy h -ideals, ( , ) k  q -fuzzy h -bi-ideals and     ( , ) k  q -fuzzy h -quasi-...

Historically females of all ages have been underrepresented in clinical research. Reasons for this exclusion are multifactorial and may possibly have their origins in regulation that forbid the participation of females of childbearing potential in the earliest phase clinical studies that support drug approval. Decades of female underrepresentation in clinical studies has resulted in inequality ...

let $r$ be a commutative ring. the purpose of this article is to introduce a new class of ideals of r called weakly irreducible ideals. this class could be a generalization of the families quasi-primary ideals and strongly irreducible ideals. the relationships between the notions primary, quasi-primary, weakly irreducible, strongly irreducible and irreducible ideals, in different rings, has bee...

Abstract Fertility has declined in developed countries but whether there is a similar pattern the number of children individuals wish to have (henceforth an ideal children) remains unclear. Using repeated cross-sectional survey data from Finnish Family Barometers, we examine birth cohort changes among men and women five cohorts (1970–1974, 1975–1979, 1980–1984, 1985–1989, 1990–1994). We also in...

in this paper, we introduce the notion of primal strong co-ideals and give some results involving them. it is shown thatsubtractive strong co-ideals are intersection of all primal strong co-ideals that contain them. also we prove that the representation of strong co-ideals as reduced intersections of primal strong co-ideals is unique.

in recent decades, the fertility rate in iran has gone through dramatic changes due to different reasons. one of these reasons is women’s increasing participation in the workforce and modern employment which has imposed changes to the childbearing behavior. on the other hand, working women face different challenges regarding childbearing. the present qualitative study investigates the childbear...

the purpose of the study is to show in which trimester of pregnancy is fatigue more common among working women, and whether or not there is any relationship between fatigue rate and educational level, income, etc. this is a longitudinal study. from the total number of patients who came to zeinab university hospital, 100 completed a demographics 50 item questionnaire and the numerical rating sca...