Judul: Sorgum Sebagai Pengganti Jagung Dengan Penambahan Tepung Tanaman Paku Air (Azolla Pinnata)Pada Ransum Puyuh Terhadap Mda Dan Kualitas Telur Puyuh
Abstrak: Penelitian ini bertujuan untuk mempelajari pengaruh sorgum dengan penambahan tepung tanaman paku air (Azolla pinnata) sebagai ransum puyuh petelur terhadap kualitas telur dan nilai MDA (Malondialdehyde). Penelitian ini menggunakan 30 ekor puyuh yang berumur 44 hari. Analisis yang digunakan pada penelitian ini adalah analisis deskriptif dengan cara membandingkan antar perlakuan. Perlakuan yang diberikan adalah ransum kontrol jagung (P0), ransum perlakuan sorgum (P1), ransum perlakuan sorgum + 1% tepung Azolla pinnata (P2), ransum perlakuan sorgum + 2% tepung Azolla pinnata (P3), dan ransum perlakuan sorgum + 3% tepung Azolla pinnata (P4). Peubah yang diamati adalah performa, kualitas telur (bobot telur, bobot kuning telur, bobot putih telur, bobot kerabang, tebal kerabang, skor kuning telur, dan Haugh Unit) dan kadar nilai MDA dalam kuning telur. Hasil yang didapatkan menunjukkan bahwa penggunaan sorgum dengan penambahan tepung Azolla dapat menyeimbangkan kandungan karetenoid yang terindikasi dalam skor warna kuning telur, tidak mengganggu performa puyuh, dan adanya aktivitas antioksidan yang dihasilkan oleh tepung Azolla (beta-karoten) pada telur puyuh.
Keyword: Azolla pinnata, kualitas telur, MDA (malondialdehyde), sorgum

Judul: Substitusi Jagung dengan Sorgum yang Ditambahkan Tepung Daun Singkong terhadap Kualitas Telur Puyuh
Abstrak: Sorgum is an energy sources which is highly potential to develop. It has low carotene level, so it has to be balanced by adding carotene in the feed meal. Cassava leaf meal is a kind of forages which has high carotene level 154mg kg-1. This research aimed to study the effect of White Sorgum as corn subtitution with cassava leaves meal combination on the quality and vitamin A of Japanese Quail Egg. This observations used completely randomized design with five treatment and three repetition (10 eggs/repetition). The treatments are control (P1), 50% sorgum + cassava leaves meal 0% (P2), 50% sorgum + cassava leaves meal 1.5% (P3), 50% sorgum + cassava leaves meal 3% (P4), 50% sorgum + cassava leaves meal 4.5% (P5). It is concluded that sorgum and cassava leafs meal were able to increase egg weight, yolk color, albumin weight, haugh unit, and vitamin A level.
Keyword: vitamin A, quail egg, sorgum, egg quality, cassava leaves meal

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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