Judul: Tsunami risk assessment using probabilistic approach and GIS-based SAW Method: case study coastal area of Padang Sumatera Barat, Indonesia
Abstrak: Tsunamis are among the world's most destructive natural hazards. Tsunami is a system of gravity waves formed in the sea as a result of a large-scale disturbance of sea level over a short duration of time. A tsunamigenic earthquake is an earthquake that has generated a tsunami. In Indonesia, during the period 1600-2000, tsunamigenic earthquake occurrences are very often (90.5%). The objective of this research is to assess tsunami risk using Probabilistic approach and GIS-based SAW method, on coastal area of Padang, Sumatera Barat province, Indonesia as a case study. The Probabilistic approach was chosen to assess the probability of distributions and recurrence times (return periods) for tsunamigenic earthquakes with different magnitudes, for Indonesian region in Eurasia plate. The GIS-based SAW method is required to assess tsunami risk as spatial information, using the integration of the hazard and vulnerability. The outputs of this research are the probability of future tsunami for Indonesian region in Eurasia plate, tsunami risk zone and regional planning recommendation for coastal area of Padang.
Keyword: using Probabilistic, hazard, vulnerability, approach, GIS-based SAW method

Judul: Mapping of Tsunami Vulnerability Levels using Geographic Information Systems in the Bungus Bay Coastal Area, West Sumatra
Abstrak: Wilayah Teluk Bungus termasuk dalam wilayah administrasi Kota Padang dan menjadi salah satu wilayah yang mempunyai probabilitas tinggi akan terjadinya bencana alam gempa bumi dan tsunami. Hal ini terjadi dikarenakan wilayah Teluk Bungus berhadapan langsung dengan pertemuan lempeng Eurasia dan lempeng Indo-Australia, yang rentan terhadap patahan aktif serta tumbukan antar lempeng bumi. Penelitian ini bertujuan untuk mengidentifikasi dan memetakan tingkat kerentanan tsunami di wilayah Teluk Bungus, Sumatera Barat. Peta kerentanan tsunami dibuat menggunakan metode tumpang susun (overlay) dengan lima parameter, yaitu elevasi daratan, kemiringan lereng, jarak dari garis pantai, jarak dari sungai, dan penggunaan lahan. Setiap parameter ini memberikan kontribusi baik besar maupun kecil dalam menentukan nilai kerentanan tsunami di lokasi penelitian. Penelitian ini terbagi dalam dua tahap yaitu diawali dengan pengolahan data dan dilanjutkan dengan tahap survei lapang. Klasifikasi tingkat kerentanan tsunami dibagi menjadi lima kelas yaitu sangat rendah dengan luas wilayah sebesar 2757.07 ha (27,79%), rendah dengan luas wilayah sebesar 4228.8 ha (42,62%), menengah dengan luas wilayah sebesar 1894.99 ha (19,10%), tinggi dengan luas wilayah sebesar 945.81 ha (9,53%), dan sangat tinggi dengan luas wilayah sebesar 95.2 ha (0,96%).
Keyword: Bungus bay, coastal vulnerability, GIS, tsunami

Judul: Sintesis Flavonol melalui 2’-Hidroksikalkon
Abstrak: Flavonol is a class of flavonoids commonly found in fruits and vegetables. Flavonol is very useful, especially in food sector and health. In this study, flavonol unsubstituted was successfully synthesized from an intermediate material 2’-hydroxychalcone. The 2’-hydroxychalcone was synthesized by Claisen-Schmidt condensation method between o-hydroxyacetophenone and benzaldehyde using 4 different catalysts, namely KOH 60%, solid pellet of KOH-grinding technique, BF3-Et2O, and NaH in DMF. The KOH 60% was the best catalyst, giving the highest yield (57%). Afterward, the flavonol was synthesized in 1-stage oxidation cyclization of o-hydroxyacetophenone using Algar-Flynn-Oyamada (AFO) reaction, giving 76%. The flavonol total yield from 2’-hydroxychalcone was 43%. All synthesized products were characterized by their melting points and their spectra. The success of the synthesis flavonol opens the way to synthesis of useful flavonol derivatives such as quercetin and kaempferol
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