Judul: Penggunaan Media Sosial Instagram dan Perilaku Gizi Seimbang pada Mahasiwa Institut Pertanian Bogor
Abstrak: Penelitian ini bertujuan menganalisis penggunaan media sosial Instagram dan perilaku gizi seimbang pada mahasiswa Institut Pertanian Bogor. Desain penelitian ini adalah cross sectional study yang melibatkan 63 subjek mahasiswa gizi dan 63 subjek mahasiswa non gizi Insitut Pertanian Bogor. Keragaman konsumsi pangan diukur menggunakan kuesioner Weekly Food Variety Score, sedangkan aktivitas fisik diukur menggunakan Recall Aktivitas Fisik 2 x 24 jam. Hasil penelitian menunjukkan frekuensi akses akun Instagram pada mahasiswa gizi sebesar 5 kali/minggu, sedangkan mahasiswa non gizi 7 kali/minggu (p<0.05). Akun organisasi gizi/kesehatan merupakan akun yang paling banyak diikuti oleh mahasiswa gizi, sedangkan mahasiswa non gizi adalah akun food blogger. Rata-rata durasi penggunaan Instagram pada kedua subjek sebanyak 3 jam per hari. Aktivitas fisik hari libur dan hari kuliah pada kedua subjek tergolong sangat ringan. Keragaman konsumsi pangan kedua subjek tergolong cukup baik. Perilaku hidup bersih dan sehat kedua subjek tergolong baik. Tidak ada perbedaan yang signifikan pada durasi penggunaan Instagram, keragaman konsumsi pangan, aktivitas fisik, dan perilaku hidup bersih dan sehat pada kedua subjek (p>0.05). Tidak terdapat hubungan antara frekuensi akses akun Instagram dan durasi penggunaan Instagram dengan keragaman konsumsi pangan, aktivitas fisik hari libur dan hari kuliah, serta perilaku hidup bersih dan sehat (p>0.05).
Keyword: aktivitas fisik, keragaman konsumsi pangan, media sosial, perilaku hidup bersih dan sehat

Judul: The Correlation between Instagram Use with Nutrition Knowledge, Eating Behavior, Physical Activity, dan Nutritional Status of IPB Student
Abstrak: Penelitian bertujuan untuk menganalisis hubungan antara penggunaan media sosial dengan pengetahuan gizi, perilaku makan, aktivitas fisik, dan status gizi. Desain penelitian ini yaitu cross sectional yang terdiri dari 48 subjek gizi dan 48 subjek non-gizi yang dipilih secara purposive sampling. Pengumpulan data dilakukan melalui wawancara dan self-administrated secara online. Durasi penggunaan media sosial kedua kelompok subjek termasuk dalam kategori light user (63,5%) dengan frekuensi akses informasi sebanyak ≤3 kali per minggu (78,1%). Pengetahuan gizi kedua kelompok subjek dalam kategori baik (99%). Keragaman pangan subjek gizi termasuk dalam kategori tinggi (66,7%), sedangkan subjek non-gizi termasuk dalam kategori sedang (43,8%). Aktivitas fisik kedua kelompok subjek termasuk ke dalam kategori ringan (81,3%). Status gizi kedua kelompok subjek termasuk dalam kategori normal (66,7%). Terdapat perbedaan yang nyata pada pengetahuan gizi dan keragaman pangan antara kedua kelompok subjek (p=0,00 dan p=0,012). Dapat disimpulkan bahwa penggunaan Instagram secara bijak dan cermat memiliki manfaat yang positif terhadap beberapa variabel yang diteliti
Keyword: eating behavior, nutrition knowledge, physical  activity, social media

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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