Judul: Landslide Hazard Analysis with Geographic Information System (GIS) Application in Padang Pariaman Regency
Abstrak: Bencana longsor dapat mengancam daerah permukiman, lahan pertanian, infrastruktur dan hutan seperti yang sering dijumpai di daerah perbukitan. Kondisi topografi di Kabupaten Padang Pariaman yang cukup landai serta terletak pada dua jalur patahan lempeng global mengakibatkan daerah tersebut rawan bencana longsor. Tujuan penelitian ini mengidentifikasi tingkat kerawanan dan risiko serta sebaran daerah longsor di Kabupaten Padang Pariaman. Penelitian ini menggunakan data sekunder dengan melakukan skoring dan pembobotan terhadap parameter longsor. Hasil penelitian diperoleh areal dengan tingkat kerawan longsor rendah 2.899,13 ha (2,22%), kerentanan sedang 39.485,20 ha (30,24 %), kerentanan tinggi 29.706,89 ha (22,75%) dan kerentanan sangat tinggi 58.491,41 ha (44,79%). Wilayah rawan longsor sangat tinggi banyak dijumpai di Limo Koto Timur (7.031,85 ha), IV Koto Aur Melintang (6.265,79 ha), Limo Koto Kampung Dalam (5.604,04 ha), Sungai Limau (5.341,70 ha), Dua Kali Sebelas Kayu Tanam (5.225,93 ha), Sungai Geringging (5.041,83 ha), dan Patamuan (4.218,86 ha). Pemetaan wilayah risiko longsor di Kabupaten Padang Pariaman didominasi oleh kelas risiko sedang yaitu 62.577,28 ha (47,92%). Sebaran wilayah kategori risiko sangat tinggi banyak dijumpai diantaranya di Kecamatan VII Koto Sungai Sarik (235,15 ha), Limo Koto Kampung Dalam (145,73 ha) dan Patamuan (142,42 ha).
Keyword: landslide, map, prone, risk

Judul: Pemetaan Kawasan Rawan Bencana dan Analisis Resiko Bencana Tanah Longsor dengan Sistem Informasi Geografis (SIG) (Studi Kasus Kawasan Kaki Gunung Ciremai, Kabupaten Majalengka)
Abstrak: Landslide disaster is one of the natural disasters that often occur in Indonesia and is generally common in mountainous regions, the rainy season and is closely related to natural conditions such as soil type, rock type, rainfall, land slope and land cover. The aim of this study is to mapping hazard landslide areas and to analyze the risk of landslides in the Ciremai foothills region Majalengka district. Puslittanak (2004) is using to be a model of analyzing landslide susceptibility prediction in study area, the formula is Total Score = 0,3 FRain Falls +0,2 FGeology +0,2 FLand Slope +0,2 FLand Cover +0,1 FSoil Types. Risk analysis was analyzed by quantitative models based on research of Alhasanah (2006) through the overlaying property map score (infrastructure map, road map and land cover) with landslide vulnerability map. In study area, low landslide susceptibility class dominated by flat topography, the dominant rock type is Qa (Aluvium), soil type is Latosol and rainfall intensity 2500-3000 mm/year. Medium landslide susceptibility occur in flat to a relatively steep slope with the type soil dominated by Andosol and level of rainfall intensity is 2500-3000 mm/year. At high landslide susceptibility, dominated land cover is forest with steep topography (15-30%), rock type is dominated by Qvu and the soil type is Andosol with rainfall 3000-3500 mm / year. Very high vulnerability to landslides mostly located in forest areas with very steep slope (>45%), high rainfall intensity 3000-3500 mm/year and dominated by Qyu rock type and Andosol soil type. Based on the analysis of vulnerability map, in area study obtained low vulnerability covered area 2160,45 hectares, medium vulnerability with covered 15319,71 hectares, 21992,49 hectares of high landslide vulnerability and very high vulnerability covered 6191, 91 hectares. Very high vulnerability mostly located in Argapura with 2811,78 hectares (45,41%). Based on the analysis of risk maps, the area of research has a low risk area with a wide level of 13212,36 hectares (28,93%), medium risk level covered 31507,38 hectares (69,00%), high risk level covered 806,94 hectares ( 1,77%) and very high risk level covered 137,88 hectares (0,30%). Areal distribution of very high risk level areas are the largest in the Maja with covered area 32,67 hectares (23,69%).
Keyword: 

Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell