objective: in this study the efficacy of two agent of this biological control agent of corn stem borer in corn fields compared with common synthetic insecticides endosolfan to find a suitable alternative for chemical control of pests in corn fields. methods: in order to evaluate the efficiency of biocontrol agents of corn stem borer ,ostrinia nubilalis, experiment was conducted in a randomized ...

the aim of the research was analysis of rice producers’ perceptions of participatory communication in the use of integrated pest management (ipm). research population was consisted of rice producers in the west of mazandaran province (n=16126), whose 187 ones were selected using cochran’s formula. data were gathered by systematic random sampling method. the instrument for data collection was a ...

the synthesis of heat integrated multi-component distillation systems is complex due to its huge search space for structural combination and optimization computation. to provide a systematic approach and tools for the synthesis design of distillation systems, a new method for modeling heat integrated columns is presented, and the operating cost objective function is minimized by improved harmon...

the present study was conducted to computer social skills of male students with partially hearing impairment (phi ) in integrated versus nonintegrated school settings in tehran, iran. in this ex post facto research, 60 phi students participated(30 students in integrated schools and 30 in nonintegrated schools). in this study two different kinds of educational settings were considered as an inde...

the purpose of this study is to evaluate greenhouse owners’ knowledge regarding integrated pest management (ipm) in the production of greenhouse cucumber in khorasan razavi province.the survey research was a descriptive – correlational one. the study consisted of all farmers who cultivated greenhouse cucumber in khorasan razavi province (n=160), of whom 108 were selected through a random sampli...

Abstract The present study intended, firstly, to investigate the effect of web-integrated instruction on self-regulated learning ability in EFL writing, and secondly, to compare and contrast the effects of paper-based feedback and web-assisted feedback on the self-regulated learning ability. To this end, a quasi-experimental design was applied for both cases. In line with the first objective, ...

Background: The purpose of this study is to present an integrated model for the Iranian general dentistry curriculum. Methods: In this study, the qualitative method of focal groups was used. First, using library studies and analysis and interpretation of the resulted information, possible types of integration in the dental curriculum and real experiences of some of the world's leading universit...