Tabu #1 : bilimsel makale yazmak çok zordur(!)

Target Group: Undergraduate student who has never made a scientific research, especially Astronomy students. Objective: To show this group, making a scientific research and resulting it is not much difficult. Method: Making a research on practical, and writing an article. Result: Young scientists who trust themselves, can make a scientific research, made a few support to the Oceon of Science.peer-reviewe

Astronomide yaygin öğrenim arayişlari ve meyvesi beyaz cüce

Executing Expansive Learning, which means learning without any schedule, place or intructor, has confused every astronomers' mind. For us, as the students of different universities and perspectives, it was confusing how to share our knowledge and experience. The astronomy students who met at the 4th National Astronomy Student Congress in 2006, started a solution based on share of knowledge and experience. This report tells us the story of Beyaz Cüce workgroup which created as a result of sharing the knowledge and ideas.peer-reviewe

''Some examples for the rainfall induced earthflows in the Western Blacksea Region of Turkey

Regional meteorological anomalies induce different types of mass movements. In May 1998, the Western Black Sea Region of Turkey has experienced such a type of meteorological anomaly. Numerous residential and agricultural areas and, engineering lifelines were buried under the floodwaters. Besides the reactivation of many previously delineated landslides, thousands of smallscale landslides mostly in earthflow type occurred in all over the region. The earthflows were mainly developed in flysch type units, which have already presented high landslide concentrations. In this study, three different catchments namely Agustu, Egerci and Kelemen were selected because these subcatchments have the most landslide prone geological units of the region. The targets of this proceeding are to describe the spatial distributions and statistical assessments of the shallow earthflows triggered. The unique condition units (UCU) were employed during the statistical analyses. The numbers of the unique condition units are 4052 for the Agustu subcatchment, 13241 for the Egerci subcatchment and 12314 for the Kelemen subcatchment. The earthflow intensity is the highest in the Agustu subcatchment (0.038 flow/UCU) while this value is the lowest for the Egerci subcatchment (0.0035 flow/UCU)

Effects of land-use changes on landslides in a landslide-prone area (Ardesen, Rize, NE Turkey)

WOS: 000268776400019PubMed: 18780152Various natural hazards such as landslides, avalanches, floods and debris flows can result in enormous property damages and human casualties in Eastern Black Sea region of Turkey. Mountainous topographic character and high frequency of heavy rain are the main factors for landslide occurrence in Ardesen, Rize. For this reason, the main target of the present study is to evaluate the landslide hazards using a sequence of historical aerial photographs in Ardesen (Rize), Turkey, by Photogrammetry and Geographical Information System (GIS). Landslide locations in the study area were identified by interpretation of aerial photographs dated in 1973 and 2002, and by field surveys. In the study, the selected factors conditioning landslides are lithology, slope gradient, slope aspect, vegetation cover, land class, climate, rainfall and proximity to roads. These factors were considered as effective on the occurrence of landslides. The areas under landslide threat were analyzed and mapped considering the landslide conditioning factors. Some of the conditioning factors were investigated and estimated by employing visual interpretation of aerial photos and topographic data. The results showed that the slope, lithology, terrain roughness, proximity to roads, and the cover type played important roles on landslide occurrence. The results also showed that degree of landslides was affected by the number of houses constructed in the region. As a consequence, the method employed in the study provides important benefits for landslide hazard mitigation efforts, because a combination of both photogrammetric techniques and GIS is presented

''Earthflows in a small catchment from eastern black sea region (Turkey): Conditional (Environmental) factors and susceptibility assessments

Islahiye catchment, covering an area of 37.7 km P2 in the eastern Black Sea region, was heavily suffered from earthflows triggered by heavy rainfall in 1995 and 2002 (on July 23). Earthflows caused 17 causalities, four houses were demolished and some engineering lifeline structures were damaged in the catchment. Total 121 earthflows were recorded in the area. The weathering of the rock units, existence of steep slopes and human interaction can be evaluated as the main factors conditioning of earthflows. The main triggering factor of earthflows in the region is rainfall either intensive or long lasting. The majority of the earthflows were occurred in the weathered zones, which is mainly composed of inorganic and organic silts and silty clays of low plasticity. The slopes having more than 30 degrees constitute approximately 50 % of the entire catchment which varies between 1.5 and 4.0 km in width and 13 km in length. The minimum and maximum elevation values are 150 m and 1970 m, respectively. In order to identify other potential earthflow prone areas in the catchment, earthflow susceptibility assessments were performed using logistic regression analyses. The available raster data such as slope, aspect, curvature and elevation data were produced from digital elevation model (DEM) in GIS environment and were employed during the analyses. Two different mapping units namely pixel and unique condition units were used for performing logistic regression analyses. In addition, a comparison of performance of the earthflow susceptibility maps of Islahiye catchment was carried out. It can be said that the susceptibility map prepared based on unique condition units exhibits slightly better performance than that of pixel unit