‎This paper develops a basic theory of $H$-groups‎. ‎We‎ ‎introduce a special quotient of $H$-groups and‎ ‎extend some algebraic constructions of topological groups to the category‎ ‎of H-groups and H-maps and then present a functor from this category to the category of quasitopological groups‎.

Breast cancer is common malignancy in Thai female. Although there are well established risk factors, many environmental agents with an impact are still unknown especially with reference to occupation. The objective of this study was to investigate the risk of female breast cancer among different occupational categories in Thailand. A frequency-matched case-control study was conducted among Thai...

OBJECTIVES We updated the Swedish component of the Nordic Occupational Cancer (NOCCA) Study through 2009 in order to investigate the incidence of mesothelioma of the peritoneum and pleura in both genders, and explored occupational exposures that may be associated with mesothelioma. METHODS The Swedish component of the NOCCA Study includes 6.78 million individuals. Data from this cohort were l...

in addition to exploring constructions and properties of limits and colimits in categories of topologicalalgebras, we study special subcategories of topological algebras and their properties. in particular, undercertain conditions, reflective subcategories when paired with topological structures give rise to reflectivesubcategories and epireflective subcategories give rise to epireflective subc...

these are notes from introductory survey lectures given at the institute for studies in theoretical physics and mathematics (ipm), teheran, in 2008 and 2010. we present the definition and the fundamental properties of fomin-zelevinsky’s cluster algebras. then, we introduce quiver representations and show how they can be used to construct cluster variables, which are the canonical generators of ...

There are established reporting schemes for some occupational and work-related illnesses but these schemes may underestimate the true incidence of such diseases. Not all cases may be referred to a participating physician and access to adequate diagnostic facilities are not always available. Collecting data directly from occupational health departments may overcome some problems related to under...

UNLABELLED To reduce the risk of transmission of microorganisms standard precautions are taken for all patients expected to be exposed to blood, body fluids, or have contacts with mucous membranes and non-intact skin. These preventive measures are by far the best way to protect healthcare workers from adverse infections. AIM To analyze occupational risk exposure of healthcare workers occurrin...

STUDY OBJECTIVE To determine the association between adverse psychosocial characteristics at work and risk of first myocardial infarction in the occupational categories of Kaunas men, Lithuania. DESIGN The analysis was based upon a case-control study among full time working men in the general population of Kaunas. OUTCOME MEASURE First non-fatal myocardial infarction diagnosed in 2001-2002....

‎in this paper first we define the morphism between geometric spaces in two different types‎. ‎we construct two categories of $uu$ and $l$ from geometric spaces then investigate some properties of the two categories‎, ‎for instance $uu$ is topological‎. ‎the relation between hypergroups and geometric spaces is studied‎. ‎by constructing the category $qh$ of $h_{v}$-groups we answer the question...

Objective—To assess associations of occupational categories and job characteristics with prevalent hypertension. Methods—We analyzed 2,517 Multi-Ethnic Study of Atherosclerosis (MESA) participants, working 20+ hours per week, in 2002–4. Results—Higher job decision latitude was associated with a lower prevalence of hypertension, prevalence ratio (PR)=0.78 (95% CI 0.66–0.91) for the top vs. botto...