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: Perbandingan Karakteristik Ikan pada Rumpon dengan Atraktor Ijuk dan Rumpon dengan Atraktor Daun Kelapa di Pulau Tunda Banten
Abstrak: Author is interested in using the material palm fiber because many materials have been used for attractor such as rope and tire. The purpose of this research was to compare the characteristic of fish rumpon with palm fiber atractor to coconut leaves atractor. Gonad Maturity Level, abundance, diversity, uniformity, and the dominance index of plankton were used as tool analysis. The results showed that 97% of the fish caught were immature on a rumpon with palm fiber atractor and 96% for rumpon with coconut leaves atractor. Mostly, plankton found in both rumpon was Rhizosolenia genus. Index value of diversity in rumpon with palm fiber ranged form 0.18 to 1.35 and in rumpon with coconut leaves atractor ranged from 0.72 to 1.20. Index value of uniformity in rumpon with palm fiber atractor ranged from 0.19 to 0.52 and in rumpon with coconut leaves atractor ranged from 0.33 to 0.52. Index value of dominance in rumpon with palm fiber atractor ranged from 0.39 to 0.91 and in rumpon with coconut leaves atractor ranged from 0.43 to 0.62.
Keyword: rumpon, palm fiber, coconut leaves

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