Judul: Substitusi Ransum Komersial Broiler dengan Serbuk Gergaji Fermentasi terhadap Performa dan Potongan Komersial Karkas.
Abstrak: Penelitian ini bertujuan untuk mengevaluasi efek dari serbuk gergaji yang difermentasi dengan probiotik multigeneral dari bermacam spesies hewan (Macrotermes gilvus, Achatina fulica dan Felis catus) terhadap performa dan potongan komersial karkas ayam broiler. Komposisi serbuk gergaji fermentasi terdiri dari molases, dicalcium phosphate (DCP), probiotik, air dan serbuk gergaji yang difermentasi selama 24 jam. Ternak yang digunakan adalah 200 ekor ayam berumur 1 hari yang dipelihara selama 35 hari. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap dengan 5 perlakuan dan 4 ulangan. Perlakuan terdiri atas P0 (ransum komersial), P1 (97.5 % P0 + 2.5% serbuk gergaji fermentasi), P2 (95 % P0 + 5% serbuk gergaji fermentasi), P3 (92.5% P0 + 7.5% serbuk gergaji fermentasi) dan P4 (90% P0 + 10% serbuk gergaji fermentasi). Peubah yang diamati adalah performa (konsumsi ransum, pertumbuhan bobot badan dan FCR) serta persentase bobot potongan komersial karkas (dada, sayap, paha dan punggung). Hasil penelitian menunjukkan serbuk gergaji fermentasi tidak berpengaruh terhadap peubah yang diamati. Kesimpulan penelitian ini adalah substitusi ransum komersil ayam broiler dengan serbuk gergaji fermentasi tidak menurunkan nilai performa dan persentase karkas ayam broiler.
Keyword: ayam broiler, karkas, performa, probiotik, serbuk gergaji fermentasi

Judul: Substitusi Ransum Komersial Ayam Broiler dengan Modifikasi Konsentrat Sapi Perah Plus Probiotik: 1.Performa dan Karkas.
Abstrak: Penelitian ini bertujuan untuk mengevaluasi penggunaan konsentrat sapi perah perah, ampas tahu, dicalsium phospat (DCP) dan Probiotik dalam ransum ayam broiler terhadap performa dan persentase karkas. Penelitian ini menggunakan 200 ekor DOC strain Cobb ayam broiler dengan 5 perlakuan dan 4 ulangan. Perlakuan terdiri atas P0: ransum komersil, P1: ransum komersil dan 7.5% mengandung konsentrat sapi perah, ampas tahu, DCP, P2: ransum komersil dan 15% mengandung konsentrat sapi perah, ampas tahu, DCP, P3: ransum komersil dan 22.5% mengandung konsentrat sapi perah, ampas tahu, DCP, P4: ransum komersil dan 30% konsentrat sapi perah, ampas tahu, DCP. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dan analisis ragam (ANOVA) dengan peubah yang diamati meliputi konsumsi ransum, pertambahan bobot badan, konversi ransum, persentase karkas, persentase irisan potongan komersil karkas ( dada, paha, punggung, sayap). Hasil penelitian menunjukkan bahwa perlakuan tidak memberikan pengaruh terhadap konsumsi ransum, pertambahan bobot badan, konversi ransum, persentase karkas, persentase dada, persentase sayap namun berpengaruh nyata ( P<0.05) meningkatkan persentase punggung dan paha. Disimpulkan bahwa konsentrat sapi perah, ampas tahu, DCP, dan probiotik dapat disubtitusikan dengan ransum ayam broiler.
Keyword: ayam broiler, konsentrat sapi perah, probiotik, performa, persentase karkas

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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