Judul: Aplikasi Single Beam Echosounder dan Magnetometer untuk Mengestimasi Kedalaman Pipa Terpendam di Alur Pelayaran Barat Surabaya
Abstrak: Survei pipa dasar laut merupakan kegiatan untuk mengetahui kondisi pipa guna keperluan yang berkaitan dengan pembangunan, perencanaan infrastruktur dasar laut dan keamanan jalur navigasi. Penelitian bertujuan mengestimasi kedalaman pipa terpendam menggunakan instrumen single beam echosounder dan magnetometer. Penelitian menggunakan data hasil survei dari Pusat Hidrografi dan Oseanografi TNI AL tanggal 15-16 Oktober 2014 di Alur Pelayaran Barat Surabaya (APBS). Hasil pemeruman kedalaman divisualisasikan dalam tampilan batimetri 2 dimensi dan 3 dimensi. Pengolahan kemagnetan bumi dilakukan menggunkan metode analytic signal dan euler deconvolution sehingga diperoleh kedalaman target diduga pipa dan peta anomali magnetik. Estimasi kedalaman pipa terpendam diperoleh dari selisih antara kedalaman dasar laut dari peta batimetri dengan kedalaman target diduga pipa. Estimasi kedalaman pipa terpendam rata-rata 4,33 m dengan kedalaman terpendam minimal 0,27 m dan kedalaman terpendam maksimal 7,79 m dari permukaan dasar laut. Kedalaman pipa terpendam rata-rata masih sesuai dengan peraturan pemasangan awal pipa, namun posisi dan kedalaman pipa saat ini perlu dipertimbangkan sehubungan dengan dilakukan revitalisasi jalur pelayaran.
Keyword: pipa, estimasi, kedalaman, kemagnetan, APBS

Judul: Aplikasi instrumen Multibeam sonar dalam kegiatan peletakan pipa bawah laut (contoh studi perairan balongan)
Abstrak: In this time government tries to solve the problems of oil and gas transportation from drilling area to processing area. This problems related with time and money. For that reason, the solution of this problems have to found immediately. The purpose of this research is to get under water topography information, sediment classification and also to make under water pipeline route. Survey held in Balongan, Indramayu, West Java. Data acquisition done by using hydrostar software. Bathymetry data was processed with Caris HIPS&SIPS. Amplitude data was processed with MB-Systems this data was used to make underwater sediment classification. Depth in study area arrange from 11.5 m – 22.5 m. According to the rules of DNV-OS-F101 Submarine Pipelines Systems 2007 under water pipeline route is the right side from sounding route in 108.39 E, 6.36 S, until 108.62 E, 6.36 S, with bathymetry slope 1.5 m between area 2 and 3 also 1 m in area 3. The center region from sounding route has plain bathymetry slope but pipeline construction can not be placed because another pipeline has placed there. The type of underwater sediment gotten by processing amplitude data and core sample sediment. Then the amplitude data interpolated with Gaussian method to get underwater sediment classification. Sediment in the pipeline route dominated with clayey silt type,then silty clay type, and the last is silt type.
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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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