Judul: Kelimpahan dan Keanekaragaman Ikan Karang pada Tempurung Kelapa sebagai Fish Aggregating Device
Abstrak: Various ways can be done to reduce of catches effort in coral reef ecosystem. One of them is the use of FAD placed in the bottom waters around coral reef. The research was held from August until October 2013. The purpose of this study is to calculate the rate of coral fish diversity, abundance and fish behaviour as a Fish Aggregating Device. In this research, the coconut shells FAD were deployed at the 15 m (FAD 1), 10 m (FAD 2), and 8 m (FAD 3) away from natural reef. The number of coral fishes was obtained by using visual census method, then it was analyzed by Shannon-wiener index and Annova. The results showed that there was an impact from placing FAD in different distance on the number and abundance of coral fish. The diversity values for FAD 1, 2, 3 are 2.299, 3.334, and 3.485 consecutively. In addition, the abundance values for each FAD is 2666,666 Ind/Ha (FAD 1), 1866,666 Ind/Ha (FAD 2) and 3000 Ind/Ha (FAD 3). Most of fish attracted by these device were Pomacentridae and Caesionidae, their swimming behavior showed that they were looking for food surround FAD.The abundance and diversity value of coral fish around FAD was good, which the biodiversity index is >3. It could be categorized as Fish Aggregating Device.
Keyword: Abundance, Diversity, Fish Aggregating Device

Judul: Perbandingan Produktivitas antara Rumpon dengan Atraktor Ijuk dan Rumpon dengan Atraktor Daun Kelapa di Pulau Tunda
Abstrak: Fishermen in Indonesia applied coconut leaves as an attractor in Fish Aggregating Device (FAD). The research was to conducted to examine palm fiber, a natural material wich was utilized as an-alternative attractor. This research aimed to compare the composition of catch around FAD using coconut leaves and palm fiber, and measure the distribution of lenght, and total weight of catch. There were 224 fish caught around FAD using palm fiber, which consisted of 12 species, and 6 families. Mostly, they were Carangidae which constituted 140 fish. There were 195 fish caught aroubd FAD using coconut leaves, which consisted of 13 species, and 9 families. Mostly, they were Carangidae which constituted 103 fish. The One-way ANOVA test showed thats the value of the catch was 0,829. It means there was no significant difference between two attractor in the number of catches in each fishing around.
Keyword: fish aggregating device (FAD), palm fiber, coconut leaves, attractor

Judul: Solusi Geometri Schwarzschild untuk Dimensi 4+1 dengan Invarian Rotasi Isotropik.
Abstrak: Metrik Schwarzschild merupakan solusi eksak pertama dari persamaan medan Einstein dengan mangasumsikan metrik statik dan simetris. Metrik Schwarzschild yang ditemukan oleh Karl Schwarzschild masih dalam dimensi 3+1, namun seiring dengan teori-teori terbaru yang menunjukkan bahwa alam semesta tidak hanya di dimensi 3+1. Maka melalui penambahan dimensi, tujuan penelitian ini memperoleh solusi pada geometri Schwarzschild untuk dimensi 4+1 dengan memodifikasi koordinat bola yang invarian rotasi isotropik dan melalui penurunan rumus seperti koordinat bola, simbol Christoffel, dan tensor Ricci. Selain mendapatkan solusi ini, metrik Schwarzschild dimensi 4+1 dapat digunakan sebagai metrik dasar untuk memperoleh solusi blackhole dan wormhole pada dimensi 4+1. Hasil akhirnya, dengan memanfaatkan modifikasi koordinat bola, metrik Schwarzschild dapat dibentuk sehingga diperoleh solusi geometri Schwarzschild untuk dimensi 4+1.
Keyword: metrik Schwarzschild, persamaan medan Einstein, modifikasi koordinat bola, penambahan dimensi, invarian rotasi isotropik