Judul: Kinerja Rehabilitasi Hutan Lindung Mangrove, di RPH Cibuaya BKPH Cikiong KPH Purwakarta
Abstrak: The degradation of mangrove-protection forest in RPH Cibuaya is caused by forest utilization which gives more priority to economic value and land conversion. This kind of utilization changes the mangrove forest from natural usage into cultivation (fishpond) usage with embankment ditch system. The effort on rehabilitation is done in order to return the function of area into protection forest again. The successfulness level in KPH Cikiong is very low due to ineffective rehabilitation program and local people’s activity which disposed disturbing the forest. The aim of this research is to explain the effort on mangrove-protection rehabilitation, which observed from the large of land covering by mangrove vegetation and determining the best fishpond rent-fee. The best fishpond rent-fee determination is based on the function value of protection forest and people’s willingness to pay. The measurement of land cover was done using line intercept technique while the determination of fishpond rent-fee could be arranged from interview using Valuation Contingent Method with bargaining approach. The willingness to pay and willingness to accept were analyzed using regression statistic method. The result of land covers measurement in class I, II and III shows that between real lands cover on field is suitable to the reported land cover in contract. The percentage of comparison between real land cover and reported land cover is 100%. This percentage shows there is no side suffered both local people and Perhutani. The result of land cover measurement in class IV is less suitable to land cover reported in contract. The percentage is 83,3%. The real lands cover on the field is wider (16,7%) than in the contract. It means the local people are suffered. There is 0% of land cover in some part of class IV. The zero land cover shows that mangrove ecosystem is in degradation and unsuccessfulness of rehabilitation. The fishpond rent-fee based on the function value of protection forest and people’s willingness to pay is higher than the rent-fee that had been determined in contract. The best rent-fee of fishpond for class I is Rp 100.170,-/ha, class II is about Rp 118.930,36/ha – Rp 137.151,64/ha, class III is about Rp 136.973,62/ha – Rp 137.151,38/ha and for class IV is about Rp 188.190,66/ha – Rp 189.095,22/ha. Based on the analysis above could be concluded that the management of mangrove-protection forest using class fishpond method make the successfulness of rehabilitation disincentive
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Judul: Analisis Sosial Ekonomi Pemanfaatan Kawasan HUtan Lindung Mangrove dengan Sistem Tambak Tumpangsari yang Berkelangsungan (Kasus: RPH Cibuaya, BKPH Cikiong, KPH Purwakarta
Abstrak: Mangroves have degradation that one of it's caused by forest conversion to fishponds. RPH Cibuaya adopted silvofishery system with classes. Its consist of Class 1 (≥ 80% of mangroves), class 2 (60-80% of mangroves), class 3 (40-59% of mangroves) and class 4 (< 40% of mangroves). This research was conducted to calculate social economic value of silvofishery and shows the mangroves conservation value by rehabilitation. The data were collected by interview, questioner, direct observation and study literature. The data were analyzed with qualitatifely and quandtitafiley by R-C ratio method. Mangroves utility was not influenced by gender, social status and education. Besides use mangroves as fishponds, people use mangroves as firewood (33,33%) and natural ecotourism (26,09%). Highest income is Class 4 which is manage intensively. The seeds growth aren't disturbed by dirty water and badsmell because of less vegetation. That be one of the advantages from Class 4 besides easy and quickly harvesting (didn't disturbed by mangroves root). Because of Class 4 domination, causes the forest damage, such as cutting the vegetation or much fertilizing)
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Judul: Grup Abelian Berhingga dari Barisan Genomik DNA  (Deoxyribonucleic Acid)
Abstrak: Informasi genetik yang memprogram semua aktivitas sel terdapat dalam bentuk kode di dalam molekul DNA. Grup kodon dari basa nukleotida DNA {A, C, G, U} tidak dapat merepresentasikan daerah non kode dalam genom yang disebabkan oleh mutasi penghapusan serta penyisipan pada barisan genomik DNA. Dalam karya ilmiah ini grup kodon diperluas dengan menambahkan huruf O untuk menandakan mutasi penghapusan atau penyisipan pada kodon untuk semua triplet diperluas 1 2 3 X X X dengan i X Î{O, A, C, G, U} dari barisan genomik DNA. Grup kodon yang diperluas isomorfik dengan grup bilangan bulat modulo 125. Grup abelian berhingga dari barisan genomik DNA yang dibentuk dari himpunan seluruh pasangan terurut triplet ekson dan intron pada untai DNA isomorfik dengan grup jumlah langsung bilangan bulat modulo 64 dan 125. Kemudian grup abelian berhingga tersebut direpresentasikan sebagai grup jumlah langsung 2-grup dan 5-grup homosiklik. Bagian barisan genomik DNA tanpa penyisipan membangun blok gen yang direpresentasikan oleh 2-grup homosiklik, sedangkan bagian barisan genomik DNA yang dipengaruhi oleh penyisipan direpresentasikan oleh 5-grup homosiklik.
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