Judul: Mapping and Analysing of Landslide Hazard Zone and its Mitigation Using Geographic Information System (Case Study in North Sumedang and South Sumedang Subdistric, Sumedang Distric, West Java)
Abstrak: Landslide is the natural disaster that most frequently occurred in the study area of North Sumedang and South Sumedang subdistric. The existing of landslide hazard and risk map s are not yet adequate to be use in policy making. The aim of the research is to provide potential hazard and risk maps to mitigate landslide hazard using geographic information system technology. The result showed that most area in the North Sumedang and South Sumedang subdistrict is moderate landslide hazard covered 8.460 Ha (65,51%), high landslide hazard covered 2.798 Ha (21,67%), low landslide hazard covered 1.570 Ha (12,16%) and very low landslide hazard covered 85 Ha (0,66%). Combining landslide hazard with property value has produced map of landslide risk. Neverthe less most areas are low risk class (7.962 Ha/61,67%) and the high risk areas are only occurred in small places (568 Ha/4,4%). This phenomena showed that area with high potential class of landslide hazard is not always having a high value of risk. The risk is determined by properties value such as: infrastructure, road network and land use, while the landslide hazardous class is determined by natural factors such as: slope, soil type, geology and land use.
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Judul: Modeling Spasial Kerentanan Longsor. (Studi Kasus di Propinsi Jawa Barat, Indonesia).
Abstrak: Indonesia is frequently affected by landslides caused by both rainfall and earthquakes. During the period 1981-2007 the annual landslide frequency varies with an average of 49 events per year this was reported by (Chrisanto et al., 2008). There is also information from the global catalogue presented by (Kirschbaum et al., 2009) where in the years 2003 and from 2007 to 2009 there were reports 97 landslides in Indonesia, which produced 872 casualties. Also within the period of 2011-2012 where in 2011 there was about 29 events in West Java alone and in 2012 almost all of regions in Indonesia had a landslide event due to the high intensity of rainfall and active tectonic systems in that year. (Geological Agency, 2011 & 2012). Fatalities in Indonesia caused by landslides were also high. Study done by (Petley, 2007) showed that in 2007, total number of fatalities caused by landslides in Indonesia alone was 465 which was the second highest next to China. Due to the high occurrences of landslides and the number of fatalities, there is a need of mitigation strategies in Indonesia to prevent future landslide disasters. One of the mitigation strategy is to provide landslide susceptibility mapping. This research aims into developing a spatial modeling method in landslide susceptibility that can find landslide susceptibility area based on the data being analyzed. The result of the research can also observe the main factors that supports the events of landslides; predict the areas that are prone to landslides; and generate landslide susceptibility map of the areas that are prone to landslides. This research is done within 4 regencies in West Java Province which are Cianjur Regency, West Bandung regency, Bandung Regency, and Garut Regency. The area of this research is chosen because of the characteristic that is mountainous in the West Java Province which is the characteristic where landslides most likely occur in West Java. The materials used in this research is digital maps in vector format that is Landuse/Landcover Map, Soil Type Map, Geology Map, Climate Type Map, Annual Rainfall per Year Map, Landsystem Map, River Map, and Landslide Data. The tools used in this research are Personal Computer, GIS Software, Statistic Software (SPSS), Microsoft Office (MS Word, and MS Excel), and GPS. The factors were given rescaled scores based on the correlation between the landslide densities. The methods used in this analysis were regression analysis and correlation analysis in determining the factors to be analyzed and Principal Component Analysis (PCA) in determining the weight of each factors. From the 9 factors of landslide chosen for the analysis, based on the result of the weight determination, principal component 1 until principal component 8 which explained 96% of the total variance of the data gave the most accurate overall accuracy result for 3 susceptibility class at 68.20%. The mathematical equation obtained from this model: Landslide Susceptibility Index (LSI) = 0.231 * Landuse/Landcover + 0.188 * Slope + 0.112 * Distance to River + 0.107 * Soil Type + 0.100 * Annual Rainfall + 0.073 * Population Density + 0.068 * Geology Age + 0.066
Keyword: Landslide Susceptibility, PCA, Spatial Modeling, West Java, Rainfall, Geology Map, Scoring Development, Earth Qualies, Natural Resources

Judul: Penambahan α-Tocopherol sebagai Antioksidan dalam Pengencer Tris Kuning Telur Spermatozoa Kucing pada Suhu 4 ⁰C
Abstrak: Stres oksidatif pada sperma terjadi selama pengolahan semen dan berdampak pada kerusakan sperma. Antioksidan α-Tocopherol merupakan salah satu antioksidan yang termasuk ke dalam kelompok antioksigen. Antioksidan ini dapat mengurangi aksi radikal bebas dan menurunkan stress oksidatif pada sperma. Penelitian ini bertujuan menguji efektivitas penambahan α-tocopherol pada pengencer tris-kuning telur terhadap kualitas semen cair yang berasal dari kauda epididimis kucing. Kauda epipidimis kucing didapatkan dengan metode kastrasi. Kauda epididimis kemudian dipisah dan dicacah untuk mendapatkan spermatozoa kucing. Semen dengan motilitas >70% diencerkan pada kelompok pengencer tris kuning telur (TKT), tris kuning telur dengan α-tocopherol 0.1% (TKT+T-0.1%), tris kuning telur dengan α-tocopherol 0.2% (TKT+T-0.2%), dan tris kuning telur dengan α-tocopherol 0.3% (TKT+T-0.3%). Semen cair disimpan selama 4 hari (H0-H4) pada suhu 4 °C, kemudian dilakukan evaluasi kualitasnya (motilitas, viabilitas, abnormalitas dan membran plasma utuh sperma) setiap 24 jam. Hasil penelitian menunjukkan kualitas semen cair tidak berbeda signifikan pada H0 (P>0.05), tetapi penambahan α-tocopherol secara umum meningkatkan kualitas semen pada H4 pascapreservasi. Berdasarkan hasil penelitian, kelompok pengencer TKT+T-0.1% adalah perlakuan terbaik.
Keyword: antioksidan, kucing, tris kuning telur, α-tocopherol, radikal bebas