Judul: Densitas Otot Dan Tulang Femur Sebagai Respon Terhadap Implan Besi (Fe) Berpori Pada Tikus Secara Radiografi
Abstrak: Penelitian ini bertujuan melihat densitas pada implan, peri-implan-tulang dan peri-implan-otot sebagai respon implan Fe berpori pada os femur tikus secara radiografi. Penelitian ini menggunakan 60 ekor tikus jantan Sprague Dawley dewasa dengan rataan berat badan 175 gram. Tikus dibagi menjadi empat kelompok perlakuan berdasarkan implan, yaitu 450 μm, 580 μm, 800 μm dan kontrol. Implan ditanamkan pada tulang femur kanan tikus dan dilakukan pengambilan gambar radiografi pada hari ke- 7, 14, dan 30 pascaimplantasi. Hasil radiografi menunjukkan perbedaan opasitas pada implan, tulang, dan otot. Implan mempunyai opasitas yang lebih radioopaque dibandingkan tulang, dan tulang lebih radioopaque dibandingnkan otot. Nilai densitas implan pada semua ukuran pori mengalami penurunan pada setiap waktu pengamatan. Hal ini menunjukkan adanya material implan yang terdegradasi. Nilai densitas peri-implan-tulang cenderung sama pada semua ukuran pori menunjukkan bahwa respon tulang terhadap implan sangat kecil, sedangkan nilai densitas peri-implan-otot cenderung meningkat yang menunjukkan adanya respon dari otot di sekitar implan terhadap implan.
Keyword: densitas, implan, peri-implan-tulang, peri-implan-otot, radiografi

Judul: Densitas Radiografi Implan Besi (Fe) Berpori dan Reaksi Jaringan pada Persembuhan Tulang Femur Tikus Pascaimplantasi
Abstrak: Penelitian ini bertujuan menilai densitas film radiografi daerah implantasi pada tikus Sprague Dawley pascaimplantasi besi berpori. Tikus Sprague Dawleysebanyak 60 ekor digunakan dalam penelitian ini yang dibagi dalam 4 kelompok. Masing-masing kelompok terdiri atas 15 ekor tikus dengan perlakuan kontrol, besi berpori 450 μm, 580 μm, dan 800 μm. Tulang femur tikus dibuat celah pada bagian lateral tulang femur. Celah kemudian ditutup bahan implan besi berpori dengan ukuran 5 x 2 x 0.5 mm3 pada kelompok perlakuan. Gambar radiografi diambil pada hari ke-3, 37, 64, 97 pascaimplantasi. Film radiografi yang dihasilkan kemudian dianalisis untuk menilai densitas otot, tulang, implan, peri-implan proksimal tulang femur, peri-implan distal tulang femur, dan peri-implan otot. Hasil menunjukan bahwanilai densitasimplan besi (Fe) berpori secara umum mengalami penurunan selama proses persembuhan tulang. Nilai densitas jaringan tulang dan otot secara umum juga meningkat. Nilai densitas peri-implan besi (Fe) berpori pada semua ukuran jugamenurun. Kesimpulan yang dapat diberikan adalah ukuran pori implan besi berpengaruh terhadap proses persembuhan tulang.
Keyword: densitas, implan, jaringan, persembuhan, radiografi

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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