Judul: Analisis Risiko Produksi Jamur Tiram Pada Cv Jaya Makmur Kecamatan Megamendung Kabupaten Bogor Jawa Barat
Abstrak: Oyster mushroom is one type of vegatables that began enthused by the people of Indonesia. White oyster mushroom is often used as an alternative to replace that meat because the fat content is lower so that more healthy to eat. CV Jaya makmur is one the companies in Bogor that runs the white oyster mushroom cultivation business. CV Jaya Makmur productivity is fluctuating in each cropping period. The purpose of this study is to identify the sources of ptoduction risk, analyzing the probability and impact of risk, and also risk management strategies to analyze alternatives to the cultivation of oyster mushroom on CV Jaya Makmur. Measurement of risk in studies conducted using measuring instrument such as standard deviation, z-score, and Value at Risk (VaR). The sources of the risk identified consists of the failure of the sterilization process, disease, pests, and temperature. Probability for each source of risk is as follows, 42.9% for sterilization failure, 39% for the disease, 39.7% for pests, and 30.2% for temperature. The analysis of the impact of the risk is Rp 139 460 820 for sterilization failure, Rp 72 053 666 for the disease, Rp 16 472 735 for pests, and Rp 18 594 727 for temperature. Preventive treatment strategies can be performed for all sources of risk, whereas handling mitigation strategies is only need to be done at the source of production of failure of sterilization and disease
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Judul: Analisis risiko produksi Jamur Tiram Putih pada CV Mushroom Production House Kota Bogor Jawa Barat
Abstrak: Tujuan dari penelitian ini adalah (1) mengidentifikasi sumber risiko produksi dalam kegiatan budidaya jamur tiram putih CV Mushroom Production House, (2) menganalisis seberapa besar probabilitas dan dampak risiko produksi dalam kegiatan budidaya jamur tiram putih CV Mushroom Production House, dan (3) menganalisis strategi yang dapat dilakukan untuk mengatasi risiko produksi pada CV Mushroom Production House. Penelitian ini dilaksanakan di CV Mushroom Production House yang beralamat Jl Siliwangi No 43 RT 01/03, Kecamatan Bogor Timur, Sukasari, Bogor, 16142. Pengumpulan data dilaksanakan pada bulan Maret 2011 sampai dengan Juni 2011. Jenis data yang digunakan dalam penelitian ini terdiri dari data pruner dan sekunder. Data primer diperoleh melalui pengamatan langsung dan Wawancara langsung dengan pihak yang berkepentingan di perusahaan. Sedangkan data sekunder diperoleh dari Badan Pusat Statistik (BPS), Departemen Pertanian, Perpustakaan LSI Institut Pertanian Bogor, internet dan literatur yang relevan. Analisis yang dilakukan adalah dengan pemetaan risiko. Pemetaan risiko didapat dengan mengidentifikasi dan memetakan sumber-sumber risiko produksi terlebih dahulu, menganalisis probabilitas dan dampak dari risiko produksi, kemudian menganalisis strategi penanganan risiko produksi. Berdasarkan hasil analisis yang dilakukan pada CV Mushroom Production House, terdapat sumber-sumber risiko produksi yang teridentifikasi pada usaha budidaya jamur tiram putih ini. Sumber-sumber risiko tersebut adalah serangan hama, perubahan cuaca, teknologi pengukusan (sterilisasi), kurangnya keterampilan tenaga kerja, dan teknologi inkubasi yang kurang tepat.
Keyword: Risiko produksi, Jamur tiram putih

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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