Assessment of fractal dimension and geometrical characteristics of the landslides identified in North of Tehran, Iran

The aim of the presented study is to assess the fractal dimension (D) and the geometrical characteristics (length and width) of the landslides identified in North of Tehran, Iran. At first, the landslide locations (528 landslides) were identified by interpretation of aerial photographs, satellite images and field surveys, and then to calculate the fractal dimension (D), we used the computer programming named as FRACEK. In the next step, geometrical characteristics of each landslide such as length (L) and width (W) were calculated by ArcGIS software. The landslide polygons were digitized from the mentioned landslide inventory map and rotated based on movement direction. The fractal dimension for all landslides varied between 1.665 and 1.968. Subsequently, the relationship between the length/width ratios and theirs fractal D values for 528 landslides was calculated. The results showed that correlation coefficients (R), which are different regression models such as exponential, linear, logarithmic, polynomial, and power, between D and L/W ratio are relatively high, respectively (0.75, 0.75, 0.76, 0.78, and 0.75). It can be concluded that the fractal dimension values and geometry characteristics of landslides would be useful indices for the management of hazardous areas, susceptible slopes, land use planning, and landslide hazard mitigation

Connecting Critical Hermeneutics with the Management and Organizational Studies: An Analysis of the Philosophy and Methods of its Implementation in Organizations

Critical hermeneutics is rooted in philosophy of knowledge, in general, and in the methodology of human sciences, in particular. This approach is methodologically considered as a qualitative study with the aim of achieving internal understanding in various fields such as linguistic, longitudinal and experimental sciences. Jürgen Habermas, one of the precursors of Frankfurt School, is the pioneer of this method. In 1981, he published one of his best works entitled “Communicative Interaction Theory”, and added the symbolic aspects of social interaction to Frankfurt critical theory. Thus, critical hermeneutics does not pursue a “unifying answer”; rather it seeks to portray the social phenomena that are derived through discourse. Discourse, as a means of obtaining data, is used in critical hermeneutics and as Habermas posited, the essential prerequisite for discourse is to provide space devoid of any trace of power. In this qualitative study, the researchers conducted in-depth interviews with individuals, and by transcribing the interviews, converted the phenomenon into text. These texts constitute the research data of the study. Then, the researchers interpreted the textual form of the phenomena and represented the obtained results in several limited themes, each of which is further split into certain limited categories. Since the main advantage of critical hermeneutics is developing and reorienting the existing interpretative approaches to the study of management, this paper attempts to examine this approach as a qualitative research method in organization and management studies, and represent its process and key features

Gis-Based Landslide Susceptibility Mapping With Probabilistic Likelihood Ratio And Spatial Multi-Criteria Evaluation Models (North Of Tehran, Iran)

The aim of this study is to produce landslide susceptibility mapping by probabilistic likelihood ratio (PLR) and spatial multi-criteria evaluation (SMCE) models based on geographic information system (GIS) in the north of Tehran metropolitan, Iran. The landslide locations in the study area were identified by interpretation of aerial photographs, satellite images, and field surveys. In order to generate the necessary factors for the SMCE approach, remote sensing and GIS integrated techniques were applied in the study area. Conditioning factors such as slope degree, slope aspect, altitude, plan curvature, profile curvature, surface area ratio, topographic position index, topographic wetness index, stream power index, slope length, lithology, land use, normalized difference vegetation index, distance from faults, distance from rivers, distance from roads, and drainage density are used for landslide susceptibility mapping. Of 528 landslide locations, 70 % were used in landslide susceptibility mapping, and the remaining 30 % were used for validation of the maps. Using the above conditioning factors, landslide susceptibility was calculated using SMCE and PLR models, and the results were plotted in ILWIS-GIS. Finally, the two landslide susceptibility maps were validated using receiver operating characteristic curves and seed cell area index methods. The validation results showed that area under the curve for SMCE and PLR models is 76.16 and 80.98 %, respectively. The results obtained in this study also showed that the probabilistic likelihood ratio model performed slightly better than the spatial multi-criteria evaluation. These landslide susceptibility maps can be used for preliminary land use planning and hazard mitigation purpose.Wo