this thesis basically deals with the well-known notion of the bear-invariant of groups, which is the generalization of the schur multiplier of groups. in chapter two, section 2.1, we present an explicit formula for the bear-invariant of a direct product of cyclic groups with respect to nc, c>1. also in section 2.2, we caculate the baer-invatiant of a nilpotent product of cyclic groups wuth resp...

Introduction: Thesis commonly reflects student's research interests, which are formed in the university education courses. Formation problem in thesis is one of the most important subjects in these research documents. Limitations and situations govern in research scope causes author (researcher) to limited framework of topic as problem base in his or her research. Investigation of thesis conten...

While psychologists do train, research, even practice clinical interventions, without any doubt about the subject of their study and science, they still obscure the issue of psychology, the "psychic" concept. Although passing at least one century since the recognition of the science of psychology and the extraordinary development of branches and different psychological trends, there i...

the issue of curriculum and syllabus evaluation and revision has been in center of attention right from when curriculum came into attention of educational institutions. thus everywhere in the world in educational institutions curricula and syllabi are evaluated and revised based on the goals, the needs, existing content, etc.. in iran any curriculum is designed in a committee of specialists and...

Background and purpose: Hepatitis Delta Virus (HDV) agent, or HDV, is a defective RNA virus that infects with HBV (Hepatitis B Virus). 15 millions people around the world are infected to HDV. There are different statistics in Iran and other countries about HDV incidence, according to accomplished studies. This study was done for determining HDV incidence in sari and considering its correlativ...