in this paper, we try to use modeling based on singular perturbation theory, in order to control satellite attitude during the wide rolling angle maneuvering through nonlinear h∞ control strategy. differential equations describing dynamics of the satellite are presented first, and by choosing the appropriate dynamic model for actuators and based on the standard singular perturbation model, the ...

BACKGROUND To identify opportunities for targeted prevention, we explored differences in occupational mortality from diseases and injuries related to alcohol consumption, sexual habits and drug abuse. METHODS Using data on all deaths among men and women aged 16-74 years in England and Wales during 1991-2000, we derived age- and social class-standardized proportional mortality ratios (PMRs) by...

This study characterized exposure for dust-producing construction tasks. Eight common construction tasks were evaluated for quartz and respirable dust exposure by collecting 113 personal task period samples for cleanup; demolition with handheld tools; concrete cutting; concrete mixing; tuck-point grinding; surface grinding; sacking and patching concrete; and concrete floor sanding using both ti...

The prevention, detection and amelioration of adverse events feature prominently in oncology protocols, the detailed plans for conducting clinical trials of therapies for the treatment of cancer. This paper summarises a safety review of such protocols prior to implementing OaSiS, a decision support system (DSS) in oncology [11]. OaSiS, shortly to undergo preliminary field evaluation in an oncol...

WE are all familiar with the story of the Tower of Babel, one of the strangest and most dramatic of the Old Testament. The peoples of the earth, having, at that time, a single universal language, and constituting apparently a single nation, arrive, under the leadership of the heroic Nimrod, on the fertile plains of Shinar. There they determine to erect a central city, and a colossal tower, wort...

PURPOSE A public health intervention study in Vietnam was conducted between 2002 and 2005 to assess the impact of improved water and sanitation facilities and increased awareness about active trachoma in the community. METHODS In My Thon village (MT), all four components of the SAFE strategy were implemented. In Xom Ngoai village (XN), only the S & A components of the trachoma control strateg...

AIM Cardiovascular disease is the major cause of morbidity and mortality across the world. Despite health campaigns to improve awareness of cardiovascular risk factors, there has been little improvement in cardiovascular mortality. In this study, we sought to examine the association between cardiovascular risk factors and people's perception on cardiovascular risk. METHODS This was an epidemi...

the classical test theory (ctt) and item response theory (irt) are widely used in construction and analysis of exams and questionnaires. because of the various shortcomings of ctt, irt has been designed. even though irt has overcome most of the limitations of ctt and has made computer adaptive testing possible, it is still important to point out that not enough reasons exist to totally discard ...

The article concerns constructive peculiarities of Armenian cross-domed churches in comparison with Byzantine monuments the same period.
 Cross-domed type occupies central place architecture Eastern Christian countries. Central part consists nine bays, bay is a large square, corner bays smaller squares, remaining four are rectangular. bay, limited supports, domed, and rectangular vaulted. ...

bourdieu’s sociological theory contains all the elements necessary to form a political theory. through reviewing the works of bourdieu attempts have been made in the present paper to discuss those elements and also to reconstruct a political theory by combining them in a theoretical framework. this is a new attempt and has not been yet accomplished. therefore, in the present paper attempts have...