This paper considers the near-field source location problem for a nonuniform linear array (non-ULA) in the presence of sensor gain and phase errors. A sequential optimization calibration method is proposed to simultaneously estimate the gain and phase errors as well as the locations of calibration sources involving the ranges and the azimuths by exploiting some imprecise a-priori knowledge of c...

 Important robotic tasks could be effectively performed by powerful and accurate manipulators. However, high accuracy is generally difficult to obtain in large manipulators capable of producing high forces due to system elastic and geometric distortions. A method is presented to identify the sources of end-effector positioning errors in large manipulators using experimentally measured data. Th...

medication errors account for about 78% of serious medical errors in intensive care unit (icu). so far no study has been performed in iran to evaluate all type of possible medication errors in icu. therefore the objective of this study was to reveal the frequency, type and consequences of all type of errors in an icu of a large teaching hospital. the prospective observational study was conducte...

drug prescription errors are a common cause of adverse incidents and may lead to adverse outcomes, sometimes in subtle ways, being compounded by circumstances or further errors. therefore, it is important that veterinarians issue the correct drug at the correct dose. using two or more prescribed drugs may lead to drug interactions. some drug interactions are very harmful and may have potential ...

background : significant efforts have been directed to understand medication errors in recent years. therefore, this study was conducted to determine the factors contributing to medication errors and related areas for improvement, as perceived by nurses. methods : two hundred registered nurses were asked to complete a questionnaire which asked them to identify types, stages and issues perceived...

goal: this study aims at analyzing and categorizing different grammatical errors including morpho-syntactic and syntactic errors in written narratives of mentally retarded students in tehran. the frequencies of errors are compared among students in different grades. method: descriptive-analytic method has been used. a test consisted of four picture stories have been administered to 125 students...