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 ...

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 ...

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...

the auther first defines that a theory is an interrrelated set of definitions and propositions, put forth to anticipate and explain the phenomena by dint of recognizing the relation between factors.the developmental theory, ascientific theory based on genetic methods aims to render a new organizattioin of the data and the relevant knowledge.upon this, piaget proviedes a co-variational relation ...

objectives: the purpose of this study was to compare the relationship between theory of mind and inhibitory responses in normal children and adhd. methods: this study is descriptive study, a sample size of 25 patients adhd children and 30 normal children, who were randomly selected. research instruments are questionnaires theory of mind and computerized stroop test. results: the results showed ...

social interaction requires the ability to understand people’s mental states (their intentions, desires and believes). the ability for attributing mental states is called “theory of mind.” theory of mind leads the person to explain and predict behavior. researchers showed a great interest in the relation of language and mind/language and thought. some researchers focused on methodological conce...

the present study aims to investigate the system of the visual transitivity by analyzing the images of american english file (2014) and cutting edge (2005) series based on halliday’s (1976) systemic functional linguistics and kress and van leuween’s (1997-2006) social semiotics. the system of visual transitivity refers to a type of process which determines how represented participants are label...

linda zagzebski presents a new kind of foundational moral theory in her exemplarist virtue theory which exemplary persons have considered as the foundation. in this theory all of the basic moral concepts such as good ends and right acts are defined by direct reference to paradigmatically good person. one of the most important consequences of this theory is that moral propositions are a posterio...