Judul: Perubahan Tutupan Lahan di Taman Nasional Bukit Barisan Nama NIM Selatan Provinsi Lampung
Abstrak: National Park is a conservation nature area which has function to protect life support system, maintain flora fauna and its ecosystem, which is managed by zonation system. The zonation can be divided into core zone, utilization zone and other based on the necessity. However, National Park is still facing problem such as illegal poaching, illegal logging, forest encroachment, and agrarian conflict to national park border. One of national park which has such kind of problem is Bukit Barisan Selatan National Park. The research is aimed at investigation of land use/land cover and its causes. After conducted the research by using GIS and interviewed some participants, the result showed that forest cover is decreased during period of 1991 to 2013. This decrease is due to forest encroachment, in which forest was converted into coffee plantation. In fact, it was happened before the National Park establishment.
Keyword: Bogor Agricultural University (IPB), land cover change., forest encroachment, Bukit Barisan Selatan national park

Judul: Analisis Perubahan Penutupan dan Pola Pemanfaatan Lahan di Taman Nasional Gunung Halimun Salak Menggunakan Sistem Informasi Geografi (SIG) (Studi Kasus: Kampung Adat Lebak Picung)
Abstrak: Gunung Halimun Salak National Park (GHSNP) is one of the conservation areas that have been facing forest cover changes rapidly. It’s related to people activities in and around the area. One of the communities which have been living at surround the GHSNP is indigenous peopleof Kampung Lebak Picung, Desa Hegarmanah, Kecamatan Cibeber, Kabupaten Lebak, Banten. They have been practicing shifting cultivation system. It is feared the system willm lead to forest conversion in GHSNP area. Data and information of the conditions in Kampung Lebak Picung area can be analyzed through technology Geographic Information System (GIS). The aim of this research is to study land cover changes in Kampung Lebak Picung, to investigate factors that influence land cover change, and review procedures of land management by the community at Kampung Lebak Picung Social data, and ground control point were taken in Kampung Lebak Picung for one month in June 2009. Collected data included spatial data in the form of maps, Landsat image TM and ETM + in 1989, 1997, 2007 and attribute data include sociocultural conditions, management and land use, and people perception. Spatial data were prossed by using Geographic Information System technology and Remote Sensing. The result of image processing were analyzed qualitatively using the attribute data to determine its impact on land cover changes. Land cover types in Kampung Lebak Picung consist of forest, mixed gardens, shrubs, fields, rice fields, water bodies, open land, built up land, and no data. In the period 1989-2007, rice fields land cover type were decrease. Meanwhile fields and water body land cover type were increase. In general, several types of land cover area fluctuated. Fluctuations occur on forest land cover, mixed gardens, shrubs, and open land types. In 1997, forest area were increase 20,47 ha but mixed garden and shrubs decrease of 41.93 ha and 3.27 ha. In 2007, forest land cover types decreased of 19.28 hectares but shrubs were increase 2,50 ha. Land cover changes were influenced by the increasing population and implementation of shifting cultivation system to arable land use (mixed garden and fields). Most of income source is farmers (91.67%) therefore usage of arable land (paddy fields, fields, and mix gardens) was very high. It’s feared, it will lead to forest conversion to arable land. In fact for this period of reseaerch arable land is sufficient to meet the needs of the community. Generally, people had high perception for the existence of forest, but people's knowledge of the forests and national parks are still quite low. Factor that influence land cover change are social condition, especially in land management systems. To anticipate expansion of cultivation land into forest area, the National park should alocate those activities in spesific area/zone.For that purpose the National Park should supervise the activities.
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Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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