this study investigated how group formation method, namely student-selected vs. teacher-assigned, influences the results of the community model of teaching creative writing; i.e., group dynamics and group outcome (the quality of performance). the study adopted an experimental comparison group and microgenetic research design to observe the change process over a relatively short period of time. ...

fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...

Background and Aim: Amblyopia is an important cause of weak vision and blindness. A preliminary study on validity of the current screening program in Shahrood City's kindergartens showed that this method may not be efficient enough, especially because of low sensitivity and referral problems. We tried to compare efficiencies and costs of screening by trained staff and optometrists in detecting ...

abstract biometric access control is an automatic system that intelligently provides the access of special actions to predefined individuals. it may use one or more unique features of humans, like fingerprint, iris, gesture, 2d and 3d face images. 2d face image is one of the important features with useful and reliable information for recognition of individuals and systems based on this ...

in this thesis, barium ferrite nano particles were prepared by sol-gel method. their structural and magnetic properties of samples have been investigated using thermo gravimetric analysis (tg-dta), x-ray powder diffractometer (xrd), fourier transform infrared (ftir), scanning electron microscopy (sem), field emission scanning electron microscopy (fesem), ac susceptometer, vibrating sample magne...

Background and Aim: One of the common problems of children all over the world is short stature. Due to the high costs of treatment, the present research studied the cost-effectiveness of growth hormone (Somatropin) for the treatment of children with short stature in Kerman Province. Materials and Methods: This research is an economic evaluation. The population of the study consisted of all per...