Judul: Perbandingan Ukuran Tubuh antara Sapi Peranakan Ongole dengan Sapi Brahman Menggunakan Metode Citra Digital
Abstrak: Sapi peranakan ongole dan sapi brahman merupakan sapi lokal Indonesia dengan ukuran tubuh medium. Penelitian ini bertujuan untuk membandingkan ukuran tubuh antara sapi peranakan ongole dengan sapi brahman menggunakan uji t. Parameter yang diamati dalam penelitian ini antara lain Ossa vertebrae cervicales, Ossa vertebrae thoracicae, Ossa vertebrae lumbales, Os sacrum, Os scapula, Os humerus, Ossa radius-ulna, Ossa metacarpalia, Os femur, Ossa tibia-fibulla, Ossa metatarsalia,dan panjang badan, tinggi badan, dalam dada, tinggi hip, panjang total, dan jarak antara kedua kaki depan dan belakang. Pengukuran menggunakan metode citra digital. Hasil penelitian menunjukan sapi brahman memiliki ukuran tubuh yang lebih besar, akan tetapi pada fase dewasa kelamin antara sapi brahman dan sapi PO memiliki ukuran tubuh yang hampir sama.
Keyword: citra digital, morfometrik, sapi brahman, sapi po

Judul: Pendugaan bobot badan Sapi Peranakan Ongole melalui pengukuran tubuh menggunakan citra digital
Abstrak: Tujuan penelitian ini adalah untuk menduga bobot badan sapi peranakan ongole (PO) melalui ukuran tubuh secara citra digital. Sapi PO yang digunakan dalam penelitian sebanyak 25 ekor indukan dengan umur 2-3 tahun di SPR Mega Jaya, Kecamatan Kasiman, Kabupaten Bojonegoro. Penelitian menggunakan data primer meliputi data bobot badan, ukuran tubuh secara manual, dan ukuan tubuh dengan citra digital. Metode analisis dalam penelitian ini berupa analisis deskriptif, uji t, korelasi dan analisis regresi linier berganda untuk menduga bobot badan. Pengukuan tubuh meliputi panjang badan (PB), lingkar dada (LD), dalam dada (DD), tinggi badan (TB), tinggi hip (TH), lebar kelangkang (LKel), lebar kepala (LK), dan panjang kepala (PK). Ada beberapa tambahan ukuran tubuh pada pengukuran dengan citra digital yaitu Ossa vertebrae cervicales (Ovc), Ossa vertebrae thoracicae (Ovt), Ossa vertebrae lumbales (Ovl), Ossa sacrales (Osa), Os humerus (H), Ossa radius ulna (RU), Ossa metacarpalia (MC), Os femoris (F), Ossa tibia fibulla (TF), dan Ossa metatarsalia (MT). Pengukuran PB, LD, TH, LKel, dan PK secara manual dengan citra digital (P>0.05) tidak berbeda nyata. Pengukuran DD, TB, dan LK secara manual dengan citra digital (P<0.05) bebeda nyata Analisis pada citra digital dengan perhitungan secara manual dengan ImageJ menunjukkan (P>0.05) artinya tidak berbeda nyata. Ukuran tubuh dari 19 variabel terdapat 9 variabel yang berkorelasi dengan bobot badan. Panjang badan menjadi parameter yang baik dalam menduga bobot badan ternak. Hasil penelitian menunjukkan bahwa model regresi BB = -393 + 3.76 PB + 0.11 TH + 0.67 Osc + 0.34 Ovt + 1.40 MC + 0.75 LD. Nilai koefisein determinasi (R2) pada model regresi yang dihasilkan sebesar 66.23%.
Keyword: Citra digital, pendugaan bobot badan, Sapi PO

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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