Judul: Produktivitas Hasil Tangkapan Bubu pada Terumbu Karang di Pulau Pramuka Kepulauan Seribu DKI Jakarta
Abstrak: Artificial reef made of coconut shell is an artificial habitat which is created to resemble the characteristics of natural reefs and become the alternative to improve the natural coral reefs that have been damaged. The opportunity of artificial reef utilization was researched by using experimental fishing and laboratory observe methods. The use of experimental fishing is to do the catching proses around the artificial reefs. The research was done in August 2013. Laboratory observe was done in September 2013 by observe the sample of fish intestines to get the data of abundance plankton from the inside of fish stomach. The results showed that 64 fishes was catches by bubu consist of 12 species. Red Breast Wrasse (Cheilinus fasciatus) from family Labridae is the dominant species. The plankton composition from the laboratory observe showed that Rhizosolenia and Leptocylindricus are the dominant plankton which indicate that the water is on good condition. Artificial diversity index ranged between 0,52-0,66; the uniformity index ranged between 0,17-0,21 and dominance index-0,45.
Keyword: plankton, artificial reef, coral reef, trap

Judul: Efektivitas Terumbu Buatan Berbahan Dasar Tempurung Kelapa sebagai Fish Aggregating Device di Pulau Pramuka Kepulauan Seribu
Abstrak: Artificial reefs is an artificial habitat which is created to resemble the characteristics of natural reefs to improve the community of coral reefs that have been damaged in natural waters ecosystem. The effectiveness of artificial reefs made of coconut shell is observed during the period of March 2012 - May 2012 in the waters of Pramuka island, Kepulauan Seribu, Jakarta. The method used experimental method, where bubu tambun is used to capture the specimen that will be analyze for it’s level of gonad maturity. The observations is done with the visual census method with 2 areas i.e. 1 meter and 2 meter that would later be analyzed for it’s index of diversity (H’), index homogeneity (E) and the dominance index (C) at the artificial reefs site. The results showed that 10 family with 13 species are dominant to stay while in the natural coral reef consists of 8 family with 25 described species. The result of fishing capture, it consist of 10 family (Pomacentridae, Balistidae, Chaetodontidae, Holocent, Labridae, Scaridae, Siganidae, Xanthidae, Muraenidae). Gonado Stomato Index (GSI) of fishing capture are GSI I (46%); GSI II (28%); GSI III (22%) and GSI IV (4%). Artificial reefs with 1 meter areas has a range of diversity index between 1.68 -2.5; and the uniformity index ranged between 0,68-1.07 and dominance index 0.11-0.16. Artificial reefs with 2 meters areas has a range of diversity index between 1,79 – 2,15; range of uniformity index 0.59-0.90 and the index of the dominance of 0.09- 0.16.
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Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
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