احمد نصر

Regarding their nature and their variety, and hazards that landslides have for humans life and properties, landslides have always been the center of attention and study by scientist from different fields of study such as geology,engineering geology, geomorphologies. These phenomena have a complex mechanism and different factors and variables could be effective in their occurrence, the numerous studies have been done to recognize the effective factors, classification, zonation and modeling. Accordingly, it was tried to study the landslides in Kahredan basin in northern part of Semirom, Dena Mountain in Zagros zone suburban area in Isfahan province and provide a landslide hazard zonation map by using the statistical method and the hazard map which has the most accuracy and precision will be selected. So finally it was specified the order of effective parameters in landslides. According, by selecting following six parameters including to slope aspect, lithology, land use, rainfall and distance to drainage, it was provided landslide inventory map by using following four methods. Information value, linear regression, discriminate analysis and area density. The statistical method of information value was recognized the best method of landslide hazard zonation which is capable of using in planning and urban developments. The effective parameters in landslides according to their importance are including to lithology, distance to drainage, land use, slope, aspect and rainfall respectively.

Development and production of textbook requires continuous research. One of itsimportant aspects deals with psychological features of textbook. This study aims toexplain the psychological criteria for authoring and developing textbooks ineducation, psychology and consulting disciplines. In this study, a descriptivemeasurablemethod has been used. Statistical population of the study includescurriculum experts, textbook authors, and M. A. students and B. A. senior students ofeducation, psychology and consulting of Isfahan University. We used interview andquestionnaire as the tools of our study. The purposeful sampling has been used forinterview sampling, and the size fitted categorical sampling has been used forquestionnaire sampling. In order to estimate the validity of the questionnaire andinterview, content and form validity were assessed. The reliability of thequestionnaire was determined by the coefficient of Cronbakh’s alpha that was about0/84. The results show that ideal textbooks consider psychological features morethan mean (3٫5 of 5). The results of the interview show that the features that havebeen considered include: applicability of textbook materials in life, appropriatenessof content with strengthening the interest and curiosity of students, appropriatenessof content with basic knowledge and students developmental stages, cognitive stylesof students, attractiveness of content for students and its appropriateness for theirinterests and abilities have been considered.