Judul: Komposisi Non Karkas Domba Ekor Gemuk yang Digemukkan dengan Penambahan Ampas Tahu dan Pencukuran Wol
Abstrak: Tujuan penelitian ini adalah mengevaluasi perbedaan komposisi non karkas domba ekor gamuk (DEG) yang digemukkan dengan penambahan ampas tahu dan pencukuran wol. Domba yang digunakan yaitu DEG sebanyak 12 ekor (I0). Perlakuan pertama yaitu perbedaan pakan (P1= rumput + konsentrat dan P2= rumput + konsentrat + ampas tahu) dan perlakuan kedua yaitu pencukuran wol (C1= Wol tidak dicukur dan C2= Wol dicukur). Rancangan yang digunakan adalah Rancangan Acak Lengkap pola Faktorial 2x2. Peubah yang diukur adalah bobot masing-masing komponen non karkas. Data dianalisis menggunakan Analysis of Covariance (ANCOVA) dengan covariable bobot potong. Hasil penelitian menunjukkan bahwa perlakuan perbedan pakan, pencukuran wol, dan interaksi tiap perlakuan tidak berpengaruh nyata (P>0.05) terhadap bobot dan persentase total non karkas. Namun interaksi perlakuan memberi pengaruh sangat nyata (P<0.01) terhadap bobot dan persentase alat kelamin. DEG yang diberi ampas tahu yang dicukur dan tidak dicukur, tanpa diberi ampas tahu yang dicukur dan tidak dicukur masing-masing mempunyai nilai persentase non karkas secara berurut 53.06, 52.52, 56.98, dan 57.62% dari bobot potong.
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Judul: Performa dan Karakteristik Karkas Domba Ekor Gemuk Jantan yang Diberi Pakan Ampas Tahu dan Pencukuran Wol
Abstrak: Dua belas ekor domba ekor gemuk (DEG) jantan yang diberi pakan ampas tahu dan pencukuran wol digemukkan selama dua belas minggu digunakan untuk menguraikan perbedaan performa dan karakteristik karkas. Rancangan yang digunakan adalah rancangan acak lengkap (RAL) pola faktorial (2x2). Perlakuan pertama yaitu pemberian pakan yang berbeda (P1= rumput + konsentrat dan P2= rumput + konsentrat + ampas tahu). Perlakuan kedua yaitu pencukuran wol (C1= Wol tidak dicukur dan C2= Wol dicukur). Data performa produksi dianalisis menggunakan Analysis of Variance (ANOVA), sedangkan data karakteristik karkas dianalisis menggunakan Analysis of Covariance (ANCOVA), dimana bobot awal dan bobot karkas kiri digunakan sebagai covariable. Hasil penelitian menunjukkan bahwa pemberian pakan 30% ampas tahu dan pencukuran wol memiliki interaksi secara nyata (P<0.05) dalam meningkatkan pertambahan bobot badan harian domba. Pemberian pakan 30% ampas tahu menghasilkan persentase lemak tubuh yang relatif sama yang dipotong pada bobot rata-rata 22.57 kg menghasilkan persentase karkas sebesar 41.97% sampai 46.91% dengan persentase persentase otot karkas 56.54%, lemak karkas 20.14%, dan tulang karkas 21.27%.
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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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