برگروه لی‎$ g=so_{0}(n,1) $‎، یک متریک ناوردای چپ تعریف می شود که از فرم کیلینگ-کارتان بدست می آید. زیرگروه فشرده همبند بیشین آن عبارت است از ‎$ so(n)=so(n) imeslbrace 1 brace $‎که با‎$ k $‎ نمایش می دهیم.گروه طولپایی های‎$ g $‎ عبارت است از ‎egin{equation*}‎ ‎isom_{0}(g)=g imes k‎, ‎end{equation*}‎ یعنی ضرب چپ توسط عضو های‎$ g $‎ و ضرب راست توسط عضو های ‎$ k $.‎ بنابراین، دو عمل برای ‎$ k...

in this thesis, a structured hierarchical methodology based on petri nets is used to introduce a task model for a soccer goalkeeper robot. in real or robot soccer, goalkeeper is an important element which has a key role and challenging features in the game. goalkeeper aims at defending goal from scoring goals by opponent team, actually to prevent the goal from the opponent player’s attacks. thi...

this study investigated the potential role of age in inductive and deductive grammar learning among iranian foreign language learners. the experimental population consisted of our randomly selected samples including two groups of children (with age of exposure to english within 8-13), and two groups of adults (with age of exposure to english within 11-13). thus, the comparison was between ch...

dynamic assessment according to vygotskys sociocultural theory, states that instruction and assessment are interrelated. using static forms of assessment with second and foreign language students could do more harm than good. many teachers neglect to take account of the complexity involved in learning a second or foreign language and often wonder why learning of a language take so long. thi...

heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...