Judul: Hubungan antara Variabel Intrinsik dan Ekstrinsik dengan Frekuensi Konsumsi Fast Food pada Mahasiswa Mayor Ilmu Gizi di IPB
Abstrak: Penelitian ini bertujuan untuk menganalisis hubungan antara variabel intrinsik dan ekstrinsik dengan frekuensi konsumsi fast food pada mahasiswa Mayor Ilmu Gizi di IPB. Desain penelitian yang digunakan adalah cross sectional study, dengan subjek penelitian berjumlah 69 subjek. Data yang dikumpulkan meliputi frekuensi konsumsi fast food, jenis fast food, variabel intrinsik (jenis kelamin, pengetahuan tentang fast food dan preferensi fast food), variabel ekstrisik (tingkat pendidikan orangtua, status pekerjaan orangtua, uang saku, aksesibilitas terhadap fast food, media informasi, pengaruh keluarga dan pengaruh peer group). Hasil penelitian menunjukkan bahwa frekuensi konsumsi fast food adalah jarang (<11x/minggu) dan sering (≥11x/minggu). Hasil uji Chi-square menunjukkan jenis kelamin (p=0.011) dan pengaruh peer group (p=0.021) berhubungan signifikan dengan frekuensi konsumsi fast food, sementara variabel lainnya tidak berhubungan signifikan (p>0.05) dengan frekuensi konsumsi fast food.
Keyword: variabel ekstrinsik, fast food, jenis kelamin, variabel intrinsik, pengaruh peer group

Judul: Hubungan Kebiasaan Konsumsi Fast Food, Soft Drink, dan Aktivitas Fisik dengan Status Gizi Mahasiswi PPKU IPB Tahun Ajaran 2019/2020
Abstrak: Globalisasi memengaruhi kelompok usia remaja sehingga meningkatkan konsumsi fast food dan soft drink serta kurangnya aktivitas fisik. Penelitian ini bertujuan menganalisis hubungan antara kebiasaan konsumsi fast food, soft drink, dan aktivitas fisik dengan status gizi pada mahasiswi PPKU IPB tahun ajaran 2019/2020. Desain penelitian adalah studi cross sectional melibatkan 92 subjek. Penelitian dilakukan pada Oktober hingga November 2019 di Asrama Putri PPKU IPB. Aktivitas ringan dilakukan sebagian besar subjek (70.7%) pada hari kuliah dan hampir separuh (48.9%) pada hari libur. Konsumsi pangan sebagian besar subjek tergolong kurang (<80% AKG), yaitu energi (64.1%), protein (95.7%), lemak (69.6%), karbohidrat (48.9%), kalsium (100%), zat besi (92.4%), dan vitamin C (90.2%). Fast food yang paling sering dikonsumsi adalah fried chicken sedangkan soft drink adalah minuman teh kemasan. Hampir ¾ subjek (71.7%) memiliki status gizi normal. Terdapat hubungan signfikan antara uang saku dengan konsumsi french fries dan minuman susu kemasan dengan korelasi positif (p=0.047; p=0.008), penghasilan orang tua dengan tingkat kecukupan besi dan vitamin C dengan korelasi positif (p=0.044; p=0.015), sedangkan pendidikan ibu berkorelasi negatif dengan konsumsi mie instan (p=0.006). Tidak terdapat hubungan signifikan pengetahuan gizi dengan kebiasaan makan (p>0.05), kebiasaan makan dengan status gizi (p>0.05), dan aktivitas fisik dengan status gizi (p>0.05).
Keyword: aktivitas fisik, fast food, mahasiswi PPKU IPB, soft drink, status gizi

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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