Judul: Aplikasi SIG dalam Penentuan Lokasi Hutan Kota Sebagai Mitigasi Bencana Angin Puting Beliung di Kabupaten Bondowoso
Abstrak: Cyclones disaster in Bondowoso regency is an annual natural disaster caused a lot of losses. Within the last 5 years (2009-2013), 95 incidences of cyclone have hit 75 villages in Bondowoso regency. Development of urban forest is expected to be the best solution to overcome or prevent the occurrence of cyclones disaster. Characteristics of the villages with most frequent cyclones disaster is a low area at an altitude below 500 meters above sea level, is a flat area with 0-8 % slope as big as 1045.07 ha or 89.21 %, had a temperature surface between 30˚ - 35˚C as big as 909.45 ha or 77.63 %, and is a place dominated by the type of land cover in the form of a fairly open area as big as 853.45 ha of rice fields or by 72.85 %. Area with the highest weight value that needs to be built urban forest that serves as a disaster mitigation cyclones scattered in 201 villages with an area of 32420.35 ha or 20.83 % of the total area of Bondowoso regency obtained from the scoring and overlay the four characteristics.
Keyword: urban forest, mitigation, cyclone, Bondowoso

Judul: Pemetaan Kawasan Banjir di Kabupaten dan Kota Bogor Menggunakan Sistem Informasi Geografis
Abstrak: Banjir merupakan salah satu bencana alam yang sering terjadi dan dapat menimbulkan kerugian. Salah satu metode untuk menganalisis masalah banjir adalah dengan bantuan aplikasi Sistem Informasi Geografis (SIG). Tujuan dari penelitian ini adalah mengetahui pengaruh faktor curah hujan, jenis tanah, kemiringan lereng, ketinggian lahan, tutupan lahan serta sungai terhadap peluang kejadian banjir, memetakan kawasan yang berpotensi banjir dan mengidentifikasi daerah resiko banjir. Proses identifikasi wilayah rawan banjir menggunakan metode scoring dan pembobotan. Faktor curah hujan, kemiringan lereng dan tutupan lahan merupakan faktor utama dalam peluang terjadinya banjir. Kelas kerawanan banjir kategori aman di Kabupaten Bogor memiliki luas 17632.19 ha, rendah seluas 111732.35 ha, sedang seluas 166227.16 ha dan tinggi seluas 49.56 ha. Kelas kerawanan banjir kategori aman dan tinggi tidak ditemukan di Kota Bogor, sedangkan kelas kerawanan banjir kategori rendah di Kota Bogor seluas 6885.96 ha, kelas kerawanan banjir kategori sedang di Kota Bogor seluas 5592.26 ha. Kecamatan Cileungsi di Kabupaten Bogor dan Kecamatan Bogor Barat di Kota Bogor memiliki resiko banjir tingkat tinggi paling luas dengan luas masing masing yaitu 3938.29 ha dan 831.07 ha.
Keyword: banjir, pemetaan, resiko banjir, sistem informasi geografis

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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