Judul: Penentuan zat-zat makanan dalam isi rumen sapi dan pemanfaatannya dalam ransum ayam petelur tipe medium pada masa pertumbuhan dan produksi
Abstrak: Penelitian bertujuan untuk mempelajari dan meneliti gizi rumen (limbah RPH) serta cara pengolahan guna meningkatkan mutu isi rumen sehingga dapat dimanfaatkan semaksimalnya untuk bahan campuran makanan ayam. Hasil penelitian diharapkan dapat membarikan informasi ataupun pedoman dalam penetapan cara-cara pengolahan dan jumlah pemberian untuk menyusun ransum ayam yang tepat serta ekonomis.
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Judul: Penggunaan Manure Ayam Dan Domba Dalam ransum Ayam Untuk Produksi daging
Abstrak: Penelitian untuk mempelajari pengaruh penggunaan manu- re ayam dan domba sebagai bahan campuran dari ransum ayam petelur jantan, telah dilakukan di Fakultas Peternakan, Ing titut Pertanian Bogor dari tanggal 23 Desember 1982 sampai dengan tanggal 13 Maret 1983. Dalam penelitian ini dipergunakan 200 ekor anak ayam petelur jantan strain Hy-Line umur satu hari yang dipeliha- ra dalam kandang beralas dan berdinding kawat berukuran 1 x 1 x 0.5 m, dengan kepadatan 10 ekor per meter persegi. Penelitian ini dilakukan dengan empat perlakuan dan lima ulangan, setiap ulangan terdiri atas 10 ekor anak ayam. Keempat perlakuan tersebut adalah pemberian ransum dengan persen manure (Ro), pemberian ransum yang ditambah 10 per sen manure ayam (R₁), pemberian ransum yang ditambah 10 per sen manure domba (R) dan pemberian ransum yang ditambah 5 persen manure ayam dan 5 persen manure domba (R₂). Ransum dan air minum diberikan diberikan secara ad libitum. Ranca ngan Acak Lengkap digunakan untuk mengetahui pertumbuhan, konsumsi dan konversi ransum. Setelah ayam berumur 10 ming gu dari setiap perlakuan masing-masing diambil secara acak 10 ekor ayam. Untuk mengetahui pengaruh perlakuan terhadap bobot irisan komersial, bobot distribusi tulang dan bagian yang dapat dikonsumsi dari setiap irisan komersial, bobot organ tubuh, serta bobot lemak rongga tubuh dan bobot thy- mus, dilakukan seksi dan hasilnya diolah menurut analisis peragam (Covariance) model Y T₁ a X....
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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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