Judul: Species Diversity and Conservation Strategy of Butterfly in Taman Hutan Kampus IPB Dramaga Bogor
Abstrak: Taman Hutan Kampus diketahui memiliki beberapa tipe habitat dan diduga memiliki potensi keanekaragaman kupu-kupu serta tumbuhan pakan dan tumbuhan inang yang berbeda. Penelitian ini bertujuan untuk menganalisis keanekaragaman dan komposisi jenis kupu-kupu, menginventarisasi tumbuhan inang dan tumbuhan pakan kupu-kupu, serta menyusun strategi konservasinya di empat tipe habitat Taman Hutan Kampus. Metode yang digunakan yaitu pollard transect dan trap. Data yang diambil pada penelitian ini adalah jumlah jenis dan jumlah individu kupu-kupu, jumlah jenis tumbuhan pakan dan tumbuhan inang kupu-kupu, serta karakteristik habitat. Hasil menunjukkan terdapat 66 jenis kupukupu dengan total sebanyak 975 individu, teridentifikasi sebanyak 89 jenis tumbuhan inang dan 62 jenis tumbuhan pakan kupu-kupu. Nilai kekayaan, keanekaragaman, dan kemerataan jenis kupu-kupu tertinggi terdapat di tipe habitat lahan tertutup. Nilai kesamaan komunitas tertinggi diperoleh di tipe habitat lahan terbuka dan kebun sawit. Upaya kegiatan konservasi seperti pengamatan secara berkala, penanaman tumbuhan inang dan pakan, serta pembuatan feeding site dan penangkaran perlu dilakukan untuk menjamin kelestarian keanekaragaman jenis kupu-kupunya.
Keyword: butterfly, conservation, diversity, food plant

Judul: Dinamika Keanekaragaman Jenis dan Karakteristik Habitat Kupu-kupu di Kawasan Kampus IPB Darmaga
Abstrak: The diversity of wildlife including butterfly is one of the factors that becomes a consideration on the declaration of Bogor Agricultural Institute (IPB) as Campus Biodiversity. The development of land use at IPB Darmaga requires a research on the relationship between habitat characteristics with the diversity of butterfly as a comparison with the previous study to provide habitat management data for the management of IPB Darmaga campus. The study was conducted at eight habitat types in IPB Darmaga, which are: 1) Arboretum of Landscape, 2) Al Hurriyah Forest, 3) Sengon Forest, 4) Akasia Forest, 5) DAR Area, Faculty of Forestry, 6) Residential of Lecturers (Perumahan dosen), 7) Cikabayan and 8) Gymnasium Area. The result of this research gets 707 butterfly consisting 55 species of butterfly. Butterflies which were found consists of five families, namely Papilionidae (8 species), Nymphalidae (29 species), Pieridae (8 species), Lycaenidae (4 species) and Hesperidae (6 species). Residential of Lecturers (Perumahan dosen) habitat has the highest species diversity value of 2.93 with an average temperature characteristics of 30.330C, relative humidity average of 75.89%, the value of Leaf Area Index (LAI) of 1.507 and has a diversity of larvae feed plants, butterflies feed plants and shelters. Generally, species diversity index values and the number of butterfly species has decreased compared to previous studies due to changes in land use on IPB Darmaga campus that disturbs the habitat of butterfly.
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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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