Judul: Mempelajari hubungan antara status sosial makanan dan pengaruh peer group terhadap konsumsi makanan jajanan pada pelajar SMA Negeri I Bogor
Abstrak: Penelitian ini bertujuan untuk memperoleh gambaran mengenai konsumsi makanan jajanan pada pelajar SMA dalam kaitannya dengan pengaruh peer group dan status sosial makanan. Penelitian dilaksanakan di SMA Negeri I Kotamadya Bogor. Responden yang diambil adalah sebanyak 60 orang pelajar kelas dua SMAN I Bogor. Responden terbagi menjadi tiga lapisan ekonomi, yaitu bawah, menengah, dan atas, masing-masing lapisan berjumlah 20 orang. Penentuan batas- batas strata pada populasi didasarkan atas pendapatan total orangtua per bulan dan dilakukan dengan metode kuartil. Responden pada masing-masing lapisan terdiri atas responden laki-laki dan perempuan secara proporsional. Untuk melihat hubungan antara peubah-peubah yang di- teliti digunakan Koefisien Korelasi Rank Spearman, dan untuk melihat perbedaan pada lapisan ekonomi dan jenis kelamin masing-masing digunakan Analisis Varian Ranking Satu Arah Kruskal-Wallis dan Tes U Mann-Whitney. Pengujian hipotesis dilakukan pada signifikansi a 0.05.
Keyword: 

Judul: Hubungan Status Gizi dan Uang Saku dengan Kebiasaan Jajan Siswa SMA Negeri 1 Bogor
Abstrak: Remaja termasuk kelompok yang sering mengonsumsi makanan. Uang saku yang tinggi dapat menyebabkan kebiasaan jajan yang tinggi pula. Tujuan penelitian ini adalah untuk menganalisis hubungan antara status gizi dan uang saku dengan kebiasaan jajan siswa SMA Negeri 1 Bogor. Desain penelitian ini adalah cross-sectional study dengan jumlah subjek yang dianalisis sebanyak 84 orang yang berusia 14-16 tahun. Penelitian ini dilakukan pada bulan November hingga Desember 2019. Hasil penelitian menunjukkan bahwa sebagian besar subjek memiliki rata-rata uang saku per bulan ≥Rp 750 000 (51.2%), sebanyak 65.5% subjek memiliki status gizi normal. Sebagian besar subjek (58.3%) memiliki pengetahuan gizi yang tergolong baik. Kebiasaan jajan pada sebagian besar subjek >2 kali/hari (76.2%). Sebagian besar subjek memiliki kontribusi jajanan terhadap asupan sehari yang tergolong lebih dilihat dari energi (77.4%), protein (77.4%), lemak (79.8%), dan karbohidrat (67.9%). Hasil uji korelasi Spearman menunjukkan bahwa tidak terdapat hubungan yang signifikan antara status gizi, uang saku, dan pengetahuan gizi dengan kebiasaan jajan pada subjek (p>0.05).
Keyword: kebiasaan jajan, pengetahuan gizi, status gizi, uang saku

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.
Keyword: