In current situations, quantitative and qualitative reduction of water resources has become global crisis. This subject has created many problems in Iran’s agriculture sector. In this research, effective factors on participation rate of farmers in Hashtgerd regarding optimum Utilization of irrigation networks are studied. The statistical population included all 1500 farmers in Hashtgerd city. A...

timing and the performance are important factors in the management of dental trauma. the present study was conducted to determine knowledge and effect of demographic factors of primary school teachers in kermanshah on the management of dental trauma. in this descriptive cross-sectional study, 145 randomly selected primary school teachers were investigated. a self-administered questionnaire was ...

Assigning periods to tasks in an embedded digital controller is a nonlinear integer programming problem which is NP-hard. This paper presents a polynomial time approximation algorithm to this problem with performance ratio bounded by 2. Introduction: Digital controllers found in many embedded real-time systems consist of a number of interacting tasks. These tasks execute periodically at xed rat...

This study proposes that IT professionals’ behavioral orientation towards IT knowledge and skills updating demands can take on two contrasting forms: updating-as-play or updating-as-work. Drawing on threatrigidity theory (Staw, Sandelands, & Dutton, 1981), the authors hypothesize that IT professionals who feel threatened by professional obsolescence are more likely to approach updating-as-work ...

Model updating concerns the modification of an existing but inaccurate model with measured data. For models characterized by quadratic pencils, the measured data usually involve incomplete knowledge of natural frequencies, mode shapes, or other spectral information. In conducting the updating, it is often desirable to match only the part of observed data without tampering with the other part of...