Judul: Desain Modifikasi Tempat Penyimpanan Gabah Secara Curah Di Bekasi
Abstrak: Mengingat pentingnya penanganan pasca panen, terutama penyimpanan, maka penelitian ini bertujuan untuk memperbaiki dan memberikan suatu modul tempat penyimpanan gabah secara curah. Penyimpanan bertujuan untuk mempertahankan kwalitas dan kwantitas bahan yang disimpan. Oleh karena itu tempat penyimpanan gabah harus memenuhi syarat-syarat kondisi yang baik bagi gabah sebagai bahan hidup dan hubungannya dengan lingkungan biotik maupun abiotik. Umumnya penyimpanan gabah tingkat petani di Kabupaten Bekasi masih sangat sederhana dan kurang memenuhi kondisi yang baik bagi penyimpanan. Hal ini menjadi faktor pertimbangan utama di dalam proses desain bangunan ini. Desain fungsional dalam penelitian ini bertujuan untuk memperbaiki dan menambah fasilitas tempat penyimpanan gabah supaya optimum penggunaannya. Desain fungsional juga memperhatikan faktor-faktor yang mempengaruhi dari lingkungannya. Desain struktural membahas masalah bahan konstruksi dan penentuan dimensi bagian-bagian konstruksi, sehingga aman dipakai. Analisa biąya bertujuan untuk menghitung ongkos pendi- rian bangunan tersebut berdasarkan analisa BOW. Gambar teknik detail bangunan, yang dapat dipakai sebagai petunjuk pendirian bangunan ini, merupakan hasil akhir dari penelitian ini….
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Judul: Analisis fungsional lumbung penyimpanan gabah kadar air tinggi
Abstrak: Sampai saat ini penelitian masalah padi (beras) yang merupakan makanan pokok mayoritas penduduk Asia tetap hangat dibicarakan. Berbagai usaha di sektor pra panen dan pasca panen dilakukan untuk meningkatkan mutu komoditi ini baik secara kuantitas maupun kualitas. Di bidang penanganan pasca panen, pengeringan dan penyimpanan memegang peranan yang penting dalam menjaga mutu gabah. Salah satu alat yang dirancang khusus untuk memenuhi kedua tahap penanganan pasca panen ini adalah Lumbung Penyimpan Gabah Kadar Air Tinggi (LPGKAT).
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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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