Judul: Ukuran Lahir, Keragaan Status Gizi, Dan Komposisi Tubuh Mahasiswa Tingkat Persiapan Bersama Institut Pertanian Bogor
Abstrak: Tujuan penelitian ini adalah menganalisis hubungan ukuran lahir, keragaan status gizi, dan komposisi tubuh mahasiswa Tingkat Persiapan Bersama, Institut Pertanian Bogor angkatan 2013. Desain penelitian ini adalah cross-sectional dengan puposive sampling yang melibatkan 45 orang laki-laki dan 64 orang perempuan. Hasil penelitian menunjukkan bahwa sebagian besar contoh memiliki ukuran tubuh saat lahir yang normal. Tidak terdapat perbedaan yang signifikan antara laki-laki dan perempuan dalam ukuran lahir. Sebanyak 66.1% contoh memiliki status gizi normal dan komposisi tubuh yang normal. Persen lemak tubuh, lemak viseral, massa bebas lemak (FFM), rasio lingkar pinggang-pinggul secara signifikan berbeda antara laki-laki dan perempuan. Berat badan lahir secara signifikan berhubungan positif terhadap indeks massa tubuh (p=0.023), sedangkan panjang badan lahir memiliki hubungan positif yang signifikan dengan FFM (p=0.040). Terdapat hubungan signifikan antara berat badan lahir terhadap indeks massa tubuh dan hubungan berat serta panjang badan lahir terhadap FFM setelah adanya penyesuaian beberapa faktor perancu yang meliputi jenis kelamin, indeks massa tubuh saat ini, tingkat kecukupan energi dan protein, aktivitas fisik, dan status perekonomian.
Keyword: keragaan status gizi, komposisi tubuh, ukuran lahir

Judul: Konsumsi Pangan, Aktivitas Fisik, Status Antropometri dan Persen Lemak Tubuh pada Mahasiswa
Abstrak: Penelitian ini bertujuan untuk menganalisis konsumsi pangan, aktivitas fisik, status antropometri dan persentase lemak tubuh pada mahasiswa. Subjek penelitian yang digunakan sebanyak 117 orang mahasiswa Tingkat Persiapan Bersama Departemen Gizi Masyarakat IPB Tahun Ajaran 2013/2014. Hasil penelitian menunjukkan bahwa sebagian besar subjek mengalami defisit tingkat berat pada zat gizi makro (energi, protein, lemak dan karbohidrat). Aktivitas fisik di hari kuliah dan libur sebagian besar berada dalam kategori ringan. Sebagian besar subjek memiliki status gizi normal, ukuran lingkar pinggang normal dan rasio lingkar pinggang dan pinggul normal. Persen lemak tubuh pada subjek laki-laki sebagian besar memiliki persen lemak tubuh normal (37,5%). Sementara itu, sebagian besar subjek perempuan memiliki persen lemak tubuh normal (56%). Terdapat hubungan bermakna antara indeks massa tubuh, lingkar pinggang, rasio lingkar pinggang pinggul, persen tingkat kecukupan energi dan zat gizi makro (protein, lemak, karbohidrat) dengan persen lemak tubuh (p<0.05). Namun, tidak terdapat hubungan bermakna antara aktivitas fisik dengan persen lemak tubuh (p>0.05).
Keyword: konsumsi pangan, aktivitas fisik, status antropometri, lemak tubuh

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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