Judul: Distribusi Spasial Klorofil-a, Produktivitas Primer, dan TSS di Teluk Jakarta dengan Menggunakan Citra Satelit Landsat-ETM Tahun 2002-2011
Abstrak: Stingray (Neotrygon kuhlii) is one of the demersal fish that have economic value which landed in PPP Labuan, Banten and important ecological values in the Sunda Strait. The study is done at PPP Labuan on Juny-October 2013. Purpose of this study is to examine stock stingray (Neotrygon kuhlii) in the Sunda Strait to determine the fish alternative management more appropriate and sustainble. The amount of observed fish was 101 individuals with male sex ratio of 1,0:1,2 to the female. The spawning seasons seems to be occurred in Juni-Juli. Stingray have allometric negative growth. Asymptotic length ( L∞ ) of ray was 1238 mm. Model Fox with optimum efforts to 329 trip per year and MSY 552 ton per year. The mean size of female and male reach sexual maturity was 599 mm and 511 mm, respectively exploitation rate of the stingray more than 50%, meaning that this fish has an over fishing and it seem has a growth overfishing due to caught fishes are still young more than 50%.
Keyword: Sunda Strait, Growth, Neotrygon kuhlii, The Rate Of Exploitation, Stock ssessment, Bogor Agricultural University (IPB)

Judul: Distribusi Spasial Klorofil-a, Produktivitas Primer, dan TSS di Teluk Jakarta dengan Menggunakan Citra Satelit Landsat-ETM Tahun 2002 - 2011
Abstrak: Measurements of chlorophyl-a, primary production, and TSS concentration using Landsat-ETM images during the period of 2002 – 2011 particularly for southeast monsoon (dry season) have been used in order to study the dynamics of those parameters in Jakarta Bay. Chlorophyl-a and primary distributions in Jakarta Bay show higher concentration in the coastal water than open water, meanwhile TSS concentration in Jakarta Bay show a fluctuative value. On the other hand, temporal analysis produces distribution trend of the chlorophyl-a towards out of the Jakarta Bay. Distributions of primary production tend to stay in the coastal of Jakarta Bay with increased value of spreading. While the distributions trend of TSS tend to varies. In general, the distribution patterns of chlorophyl-a and primary productions are similar, but they are different with TSS distributions. Overall, the changing parameters are influenced by human activities (anthropogenic) in Jakarta Metropolitan Area.
Keyword: anthropogenic, Landsat-ETM, Jakarta Bay, TSS, primary production, chlorophyl-a, Bogor Agricultural University (IPB)

Judul: Sintesis BaTiO3 dari Campuran Ba(OH)2 dan TiO2 dengan Tambahan PbO
Abstrak: Piezoelectric material can generate electric field in response to applied mechanical stress. Conversely, they can stretch and contract in response to an electric field. This material can be used for many applications such as transducer, microphone, ultrasound, and pressure gauge. Barium titanate is a ferroelectric material with piezoelectric properties that can be synthesized easily. The aim of this study is to synthesis barium titanate from mixture of Ba(OH)2 and TiO2, also observe its optimum temperature and the effect of PbO addition. The method of synthesis was solid-state reaction and sol-gel method, then the products were characterized with x-ray diffraction (XRD). Based on XRD analysis, the optimum temperature for both methods was 800°C. Addition of PbO to BaTiO3 in the solid-state reaction formed a compound with formula of Ba1-xPbxTiO3. The addition has changed diffraction pattern peak at 2θ and strengthened its tetragonal structure. The best result was obtained at x of 0.5 which will form a compound of Ba0.5Pb0.5TiO3.
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