Judul: Pengaruh  Subsitusi Bungkil Kacang Kedelai Denga Bungkil Biji Karet Dalam Ransum Terhadap Penampilan Ternak Babi Lepas Sapih
Abstrak: Penelitian dilakukan di kandang Laboratorium Ilmu Produksi Ternak Babi, Jurusan Ilmu Produksi Ternak, Fakultas Peternakan, Institut Pertanian Bogor, Bogor. Penelitian berlangsung dari tanggal 15 oktober 1992 samapai 10 Desember 1992. Penelitian bertujuan untuk mengetahui pengaruh substitusi bungkil kacang kedelai dengan bungkil biji karet dalam ransum terhadap penampilan ternak babi lepas sapih serta melihat prospek pemanfaatan bungkil biji karet sebagai bahan makanan ternak babi.
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Judul: Pengaruh substitusi jagung kuning dengan Salvinia molesta terhadap penampilan ternak babi lepas sapih
Abstrak: Penelitian ini dilakukan di Laboratorium Ilmu Produksi Ternak Babi, Jurusan Ilmu Produksi Ternak, Fakultas Peternakan, Institut Pertanian Bogor, selama delapan minggu sejak tanggal 16 Oktober sampai dengan 10 Desember 1993. Tujuan penelitian ini adalah untuk melihat pengaruh penambahan Salvinia molesta dalam ransum ternak babi lepas sapih terhadap penampilan produksinya dan untuk mengetahui taraf penggunaan Salvinia molesta sebagai pengganti jagung kuning dalam ransum. Ternak yang digunakan sebanyak 20 ekor babi betina, berumur kira-kira dua bulan. Bobot badan awal ternak sebesar 21,5±8,2 kg, masing-masing ternak ditempatkan pada kandang individual. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL) yang terdiri dari lima pelakuan dan empat ulangan. Untuk mengetahui pengaruh masing-masing perlakuan dilakukan sidik ragam (Anova). Ransum perlakuan yang dicoba dalam penelitian ini ada lima macam ransum yaitu RO (jagung kuning 20%, Salvinia molesta 0%), R1 (jagung kuning 15%, Salvinia molesta 5%), R2 (jagung kuning 10%, Salvinia molesta 10%), R3 (jagung kuning 5%, Salvinia molesta 15%) dan R4 (jagung kuning 0%, Salvinia molesta 20%). Hasil penelitian menunjukkan bahwa penggantian jagung kuning dengan Salvinia molesta yang sudah dikeringkan hingga taraf 20% tidak memberikan pengaruh yang nyata terhadap konsumsi ransum, pertambahan bobot badan dan efisiensi penggunaan makanan. Hasil perhitungan Income Over Feed Cost (IOFC), penggantian sebagian jagung kuning dengan Salvinia molesta hingga taraf 20% memberikan keuntungan paling tinggi.
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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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