Judul: Analisis kelayakan investasi pengembangan usaha pemasok (supplier) ikan hias adil fish farm di Depok
Abstrak: Adil Fish Farm merupakan salah satu perusahaan yang bergerak di bidang perdagangan ikan bias. Perusahaan ini memulai usahanya dikarenakan melihat peluang permintaan ikan hias yang terus meningkat dari tahun ke tahun. Saat ini Adil Fish Farm telah memiliki lahan seluas 900 m2 dan telah mencapai volume penjualan sebesar 75.000 ekor ikan hias per minggunya. Penjualan dominan dilakukan terhadap eksportir-eksportir ikan hias. Penelitian ini bertujuan untuk menganalisis keuntungan usaha, menganalisis kelayakan investasi yang ditanamkan pada usaha ini apakah layak untuk dikembangkan dan menganalisis sensitivitas usaha terhadap kemuilgkinan terjadinya perubahan harga input maupun output.
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Judul: Analisis kelayakan investasi pengusahaan ikan gurami: studi kasus di perusahaan Mekar Tambak Sari, Kecamatan Sawangan, Kota Depok
Abstrak: Pangan yang menjadi kebutuhan pokok sejauh ini cukup banyak memberikan peluang usaha. Seiring makin tumbuhnya kesadaran masyarakat pada sumber pangan bergizi tinggi, hal ini perlu diimbangi dengan ketersedian bahan pangan bergizi yang cukup. Mengkonsumsi ikan air tawar adalah salah satu cara untuk mendapatkan protein yang sehat serta bebas kolesterol. Seiring dengan hal tersebut permintaan akan ikan air tawar pun menjadi semakin tinggi. Salah satu usaha disektor perikanan budidaya air tawar, yang mempunyai potensi cukup besar adalah ikan gurami. Mekar Tambak Sari merupakan salah satu perusahaan yang mengusahakan ikan bawal dan patin, serta menjual ikan gurami. Dalam menjalankan usahanya perusahaan ini terhambat oleh kurangnya persediaan ikan gurami, sehingga permintaan (pesanan) ikan gurami tidak dapat dipenuhi seluruhnya. Selama ini Mekar Tambak Sari mendatangkan ikan gurami dari petani sekitar dan tidak mengusahakan sendiri, padahal ikan gurami merupakan salah satu produk unggulan yang ditawarkan perusahaan.
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Judul: Thermal Characteristics and Dynamics of Tropical Cyclone over Western North Pacific Ocean: A Case Study of Typhoon Songda (Chedeng) 2011
Abstrak: The frequent occasion of Tropical Cyclone (TC) over Western North Pacific (WNP) Ocean lies from 10˚N to 26˚N and 121˚E to 170˚E. Sources of TC development come from warm ocean temperature where latent heat is released during condensation processes and subsequently concentrated in the boundary layer. Relative humidity at 850-700 hPa is responsible to produce the most intense storm. Meanwhile, weak vertical wind shear between 850-200 hPa is one of the dynamical factors that lead to the development of TC. Pressure level of 850-200 hPa is chosen to minimize the thermodynamic effect in the lower troposphere. Typhoon Songda (Chedeng in the Philippines) or TSC lasted from May 18th to 30th, 2011 and strengthened into powerful Super Typhoon stage between May 24th and 27th. Long curving track and the exhibition of all sequences of TC life cycle, TSC is then considered as an ideal case of TC. The objective of the study with case of TSC is to investigate the role of thermal characteristics and dynamics on TC intensity. The research is carried out by using Advanced Research of Weather Research and Forecasting model (WRF ARW model) version 3.3. Two domains are employed in the model. The first domain situate from 02˚N to 40˚N and 118˚E to 149˚E and cover spatial resolution () of 33.1 km. The second domain situate from 09˚N to 27˚N and 119˚E to 132˚E with of 11 km. Timestep of the model () is 120 seconds. The model is supported by the following physical parameterization, i.e., Yonsei University Scheme (YSU) in the boundary layer, Kain-Fritsch scheme (KF) in the cumulus, and WRF Single-Moment 3-class scheme in the microphysics. Initial meteorological condition prior to the formation of the cyclone is generated using WRF ARW standard-release model. Sensitivity of the model output is obtained from a selected single-parameter change scenarios, namely, 10 % to 20 % decrease and increase of wind shear initial data at 850-200 hPa, and by 10 % to 20 % decrease of relative humidity initial data at 850-700 hPa. The result showed that the negative correlations between wind shear and intensity are found in wind shear scenarios. Wind shears of 10 ms-1 which lead to strengthening of the wind intensity in the early period of Typhoon development are found in wind shear scenarios. The effect of wind shear changes on wind intensity is statistically significant in the 20 % wind shear scenarios. During mature stage, weak wind intensity occurred when wind shear increase as given in the WRF standard-release and the 20 % decreasing scenario. Different situation is found in the 20 % increasing scenario where wind shear tend to weak and lead to strong wind intensity at this stage. Meanwhile, the reduction of moisture supply at 850-700 hPa resulting from 20 % decreasing relative humidity play a major role in the weakening of wind intensity and reduces mechanical energy of the cycle process as much as 300 J kg-1.
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