Judul: Perspektif kelestarian pesut mahakam (Orcaella brevirostris Gray 1886) berdasarkan habitat serta persepsi dan sikap masyarakat: studi kasus masyarakat sekitar danau semayang dan danau melintang
Abstrak: Pesut (Orcaella brevirostris) merupakan satwa yang dilindungi UU dan termasuk kedalam Apendiks I CITES 2009. Tujuan penelitian ini yaitu menganalisis hubungan antara persepsi dan sikap masyarakat dengan kondisi habitat pesut di Danau Semayang dan Danau Melintang saat ini untuk kelestarian pesut serta merumuskan upaya-upaya yang diperlukan untuk kelestariaan pesut. Penelitian dilakukan di Danau Semayang dan Melintang serta masyarakat sekitarnya, penelitian dilakukan pada bulan Juli hingga bulan Agustus 2009. Alat dan bahan yang digunakan adalah kuesioner, botol contoh air, tali dengan pemberat, secchi disk, kertas lakmus, arloji, jaring insang dan perahu motor. Jenis data yang dikumpulkan yaitu data karakteristik habitat pesut dan data persepsi dan sikap masyarakat terhadap pesut. Data persepsi dianalisis menggunakan skala likert sedangkan data sikap dianalisis secara deskriptif. Persepsi yang diberikan masyarakat terhadap kelestarian pesut positif, berdasarkan hasil analisis skala likert “Peraturan pemerintah sangat berperan dalam usaha pelestarian pesut” mempunyai nilai tertinggi dibandingkan variabel yang lainnya. Skor yang diperoleh adalah 523 dengan rata-rata 4,36, artinya masyarakat menyadari bahwa campur tangan pemerintah sangat dibutuhkan agar pesut tetap lestari. Berdasarkan hasil wawancara terhadap masyarakat, ada beberapa sikap masyarakat yang berdampak negatif terhadap habitat pesut yaitu masyarakat membuang sampah, mandi, mencuci pakaian dan membuat kakus di sungai. Kedalaman perairan Danau Semayang (1,15 m–2 m) dan Melintang (0,75 m-1,50 m) saat ini tidak memungkinkan pesut untuk tetap hidup pada kedua danau ini, mengingat ukuran pesut yang cukup besar. Produktivitas relatif ikan pada kedua danau ini sangat rendah yaitu 1,8 kg/jaring insang/hari untuk Danau Semayang dan 2,25 kg/jaring insang/hari untuk Danau Melintang. Frekuensi lalu lintas perairan di muara Sungai Pela pada hari libur lebih padat dibandingkan hari kerja dengan masing-masing 55 lintasan/jam dan 54 lintasan/jam. Sedikitnya produktivitas relatif ikan dan padatnya lalu lintas perairan menyebabkan pesut tidak ditemukan pada kedua danau ini, karena pesut menyukai daerah perairan yang banyak terdapat ikan dan perairan yang tenang. Berdasarkan permasalahan di atas, upaya yang dapat dilakukan yaitu melakukan pengelolaan terhadap habitat pesut agar sesuai dengan kriteria habitat yang disukainya, seperti menetapkan daerah-daerah habitat pesut menjadi kawasan pelestarian alam, melakukan pengerukan pada Danau Semayang dan Melintang, membuat jalur alternatif lalu lintas, menegakkan hukum secara tegas terhadap pelanggaran dalam hal menangkap ikan, membuat peraturan dalam hal pemasangan alat tangkap ikan. Upaya yang dapat dilakukan untuk mengubah sikap masyarakat yaitu dengan cara memberikan pengetahuan mengenai manfaat dari menjaga kesehatan lingkungan. Pengetahuan kesehatan lingkungan dianggap penting karena dapat direkayasa untuk mengubah sikap terhadap habitat pesut. Melibatkan masyarakat dalam usaha kesehatan lingkungan, membuat suatu kegiatan pemberdayaan masyarakat. Kata kunci: Pesut mahakam, habitat, persepsi dan sikap
Keyword: Irrawadi dolphin, Habitat, Perception and attitude

Judul: Perspektif Kelestarian Pesut Mahakam (Orcaella brevirostris Gray, 1866) Berdasarkan Habitat serta Persepsi dan Sikap Mayrakat (Studi Kasus Masyarakat sekitar Danau Semayang dan Danau Melintang), Kinerja Pengelolaan dan Strategi Pengembangan Wisata Alam Situ Gunung Taman Nasional Gunung Gede Pangrango.
Abstrak: Irrawaddy dolphin (Orcaella brevistoris) is a protected spesies area and in Appendix I of CITES 2009. Objectives of this study were to analyze the relationship between perception and attitudes of the community with the habitat conditions of the irrawaddy dolphin in Semayang Lake and Melintang Lake for irrawaddy dolphin sustainability and also formulating efforts to conserve irrawady dolphin. This study was conducted in Semayang Lake, Melintang Lake, and its surrounding on July to August 2009. Tools and materials used in this study were a questionnaire, bottled water samples, the rope with weights, secchi disc, litmus paper, watches, net and motorboat. Data in this study consisted from two main types data, which were irrawady dolphins’s habitat characteristic and data of community perceptions and attitudes about irrawaddy dolphins. Enclosed questionnaires and interviews methods used to obtain data of perception and attitudes. likert scale used to analyze data of community perception. Descriptive analysis used to analyze community attitude data. Community perceptions of irrawady dolphins were positive, based on likert scale analysis. Government rules very affected in conservation action to irrawady dolphin;s conservation action and have highest value compared to another variables and the score was 523 with the average was 4, 36, and it’s mean that the community realized that government was very important to irrawaddy dolphin’s sustainability. Based on interview result to the community, there were some attitude which have negative impact to irrawaddy dolphin’s habitat which were throwing the garbage to the water. The depth of Semayang Lake was (1,15-2 m) and Melintang Lake was (0,75-1,5 m) and impossible for irrawady dolphin to live there due to their large body size. Fish productivity in both lake is very low, which were 1,8 kg/net/day in Semayang Lake and 2,25 kg/net/day for Melintang Lake. Water traffic frequency in mouth area of Pela River in holiday is higher (55 times/hour) than in working day (54 times/hour). Lack productivity of fish and water traffic caused Irrawady dolphins could not be found in both lake because irrawady dolphins preferred area which have a lot of fish and calm stream water. Based on problem above, there some action can be done for irrawaddy dolphins sustainability which are managing habitat, setting the habitat as a conservation area, dredging the lake, make alternative way in water traffic, law enforcement, and make law about fishing procedures. Delivering information to the community about environment health education can be done to change community attitude that related to irrawady dolphins sustainability. Knowledges about environment health is very important to raise people awareness about the importance of Irrawaddy dolphins.
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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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