Judul: Prospek Pengelolaan Sampah Terpadu Berbasis Masyarakat Sebagai Upaya Konservasi Sumberdaya Hayati (Studi Kasus Kecamatan Ciracas & Jatinegara) Di Jakarta Timur.
Abstrak: The rapid increase in population growth rate of Indonesia brings benefits to growth and development of the city became the center of economic activity, industrial, social and cultural consequences of the increasing social costs. One of the impacts that occur because of increasing population and consumption patterns of society is the increasing amount of waste that is a byproduct of human activity. Trash does not always lead to adverse impacts to humans, even garbage can be used as a valuable economic commodity. Recycling activities both through the reuse, recycling and composting by the community is beneficial because it can suppress the accumulation of garbage in the environment, and also economically beneficial to society itself. Besides the production of compost from organic waste derived from natural resources to be useful in restoring the natural nutrients are broken down can be used in aquaculture, especially in forest nursery plants, especially forestry and agricultural crops in general. Analysis of the participation rate in its waste management used Spearman Correlation Test. Financial feasibility analysis of Elegant Quality compost plant can be seen from the criteria of NPV (Net Present Value), Net B/C (Net Benefit/Cost), and IRR (Internal Rate of Return). Value of economic benefits by the city garbage scavengers obtained from the estimated volume of waste dauran materials obtained by scavengers multiplied by the value of selling. Primary data were collected through interviews using questionnaires and field observations. While secondary data obtained from literature studies that collect data that has become the archives for the manager, through the tracing information from the related institutions .. Community participation in district level Ciracas in waste management were categorized as high with the percentage (71.67%), this suggests a positive outlook, because the future of education levels tend to increase recycling and composting activities provide economic benefits and have a good opportunity to developed. The economic advantages of recycling activities on average Rp 892,259.41 per ton of inorganic waste. Business dauran waste materials will provide the average income of Rp 31229.08 / day. Composting business has a value of B/C 5, while the value of business acquired IRR of 44.47% lovely compost, compost operations conducted by the present value of benefits to be implemented because it provides an additional benefit or profit of Rp 24,480,229.42. The majority of landfill waste in East Jakarta came from residential 5300 m³/day (78.91%) and the market with a volume of 580 m³/day (8.64%). Amount of landfill waste is served that is equal to 83.43%, the remaining 16.57% of waste is not transported. Handling waste in the form of recycling (4-3R) in East Jakarta at 354 m³/day will be reduced at least 5.27% per day from the garbage of 6716 m³/day. While handling in the form of composting for 46 m³/day will reduce at least 0.68% per day from the garbage of 6716 m³/day. Citizen participation and scavengers in waste reuse of waste will reduce operational costs and can reduce the burden of cleaning service in transporting waste from TPS to TPA. And use of waste as compost made by the community have ability to
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Judul: Analisis Kelayakan Usaha Pengelolaan Sampah Berbasis Komunitas di Provinsi DKI Jakarta
Abstrak: DKI Jakarta is one of regions with the biggest amount of waste in Indonesia. The amount of waste in 2010 was 6 139.33 tons per day and gradually increases up to 1.38% per year from 1987 to 2010. This research focus on analyze the management of community-based waste in the Village of Kapuk Muara, Penjaringan District, Jakarta Utara Province either based on the analysis of market aspects, technical aspects, management aspects, and socio-economicenvironmental aspects and financial aspects. There are two scenarios were used: (i) full investment from Pertamina CSR programs and (ii) alternative investment by non-governmental program. Based on market aspects, technical aspects, management aspects, and socio-economic aspects of the environment shows that community-based waste management business is feasible. Refer to financial analysis of both scenarios is feasible, respectively in scenario I and scenario II with NPV Rp48 345 205 and Rp130 972 376; IRR of 10.41 and 26.91 per cent; B / C ratio of 1.22 and 2.36 and PBP 7.7 and 4.85 years. Both scenarios are very sensitive to deviation of price the amount of plastic compared to the production of plastics.
Keyword: Bogor Agricultural University (IPB), waste banks, financial non-financial aspects, Cash flow

Judul: Karakteristik Bifurkasi Persamaan Schoedinger Nonlinier Kuintik Menggunakan Pendekatan Dinamika Sistem
Abstrak: Soliton merupakan gelombang soliter yang dapat mempertahankan bentuknya saat menjalar pada kecepatan konstan. Jika sebuah gelombang soliton berinteraksi dengan gelombang soliton yang lain maka keduanya akan mempertahankan profilnya masing-masing. Pada penelitian ini soliton diwakili oleh persamaan Scroedinger nonlinier kuintik (QNLS). Melalui pendekatan dinamika sistem akan digambarkan karakteristik bifurkasi persamaan QNLS. Dari hasil perhitungan diperoleh 3 titik kritis untuk (U1, U2) yaitu (-(k/σ) 1 4, 0); (0, 0); ((k/σ) 1 4, 0) harga eigen λ1,2 = ±2(k/β) 1 2 , λ1,2 = ±(-k/β) 1 2 , λ1,2 = ±2(k/β) 1 2 berturutturut untuk masing-masing titik kritis. Ketika k > 0 dan β > 0 atau k < 0 dan β < 0 diperoleh jenis titik kritis sadel, senter, sadel untuk masing-masing titik kritis. Sedangkan ketika k > 0 dan β < 0 atau k < 0 dan β > 0 diperoleh jenis titik kritis senter, sadel, senter untuk masing-masing titik kritis. Hasil ini metunjukkan bahwa sistem tidak mengalami perubahan titik kritis tetapi mengalami perubahan kestabilan pada bifurkasi persamaan QNLS.
Keyword: soliton, quintic nonlinier Schroedinger (QNLS) equation, system dynamics, bifurcation, critical points