Judul: Nilai Perdagingan Sapi Brahman Cross dan Australian Commercial Cross dengan Jenis Kelamin Berbeda yang Dipelihara Seeara Feedlot
Abstrak: Saat ini permintaan pasar terhadap peternakan khususnya daging sapi meningkat karena meningkatnya jumlah penduduk, pendapatan dan pendidikan. Namun, permintaan itu tidak dapat dipenuhi dengan baik karena dari segi kuantitas maupun kualitas sapi lokal di Indonesia masih kurang, sehingga dilakukan suatu usaha untuk menjaga keseimbangan pasar yaitu dengan mengimpor sapi bakalan dan daging sapi. Sapi bakalan yang dipelihara oleh industri penggemukkan sapi potong di Indonesia umumnya berasal dad Australia, contohnya sapi Brahmall Cross (BX) dan Australian Commercial Cross (ACC) dengan jenis kelamin yang berbeda.
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Judul: Penampilan produksi sapi brahman cross Australia (Steer). Brahman Cross Pare-Pare dan Sumba Ongole yang dipelihara secara intensif
Abstrak: Penelitian dilakukan di PT Kariyana Gita Utama, Cicurug-Sukabumi dan PT Sampico Adhi Abattoir, Tambun- Bekasi, mulai bulan Oktober 1990 sampai Februari 1991. Tujuan penelitian ini adalah untuk mengetahui penampilan produksi sapi Sumba Ongole, Brahman Cross Australia (steer) dan Brahman Cross Pare-Pare yang dipelihara secara intensif. Rancangan yang digunakan adalah Rancangan Acak Lengkap dengan 34 kali ulangan. Analisis Peragam dan Uji Jarak Duncan digunakan untuk mempelajari pengaruh bangsa terhadap peubah-peubah yang diukur. Hasil penelitian menunjukkan bahwa perbedaan bangsa sangat nyata berpengaruh terhadap semua sifat produksi yang diamati (P<0.01) Sapi SO dan BxA nyata lebih tinggi dalam pertam- bahan bobot badan harian dibanding dengan sapi BxP (P < 0.05) Untuk sifat produksi persentase karkas sapi BxP dan SO lebih tinggi nilainya jika dibandingkan dengan sapi BxA. Perbedaan ini dengan uji jarak Duncan adalah nyata (P < 0.05) . Sapi BxA mempunyai persentase penyusutan paling rendah selama 3 hari proses pendinginan, namun dengan -BxP perbedaan tersebut tidak nyata. Baik BxA maupun BxP menunjukkan perbedaan yang nyata dengan SO (P < 0.05) . Tebal lemak punggung sangat nyata dipengaruhi bangsa (P < 0.01) . Perbedaan ini adalah nyata untuk masing-masing bangsa (P < 0.05) . Sapi BxA mempunyai lemak punggung paling tebal, kemudian SO dan terakhir BxP. Berdasarkan indeks skor terhadap nilai ekonomi sifat kuantitatif, sapi SO paling banyak memberi keun- tungan, kedua sapi BxP dan ketiga sapi BxA. Namun bila dilihat dari sifat kualitatif (derajat perlemakan) sapi BxA yang paling baik....
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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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