Judul: Disain dan Pengujlan End Effector Robot Pemanen Cabai Merah
Abstrak: Robotik adalah teknologi yang relatif baru tetapi sudah dikenal baik saat ini, dan bioproduksi adalah salah satu industri besar di dunia, dimana di dalamnya diharapkan robotik mendapat peranan penting dalam penanganan bahan (materials handling), terutama dalam beberapa kasus yang membutuhkan banyak derajat kecerdasan.
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Judul: Desain dan Pengujian End-effector Robot Pemindah Bibit Cabai Merah pada Tray Semai
Abstrak: Cabai merah merupakan salah satu produk hortikultura unggulan Indonesia. Budidaya tanaman cabai besar termasuk cabai merah memiliki segi ekonomi yang cukup tinggi. Masalah yang timbul pada sektor pertanian umumnya adalah karena penurunan kualitas, dan kuantitas sumber daya lahan pertanian, minimnya infrastuktur penunjang pertanian, serta tenaga kerja yang berkurang. Salah satu solusi adalah menggunakan teknologi robotik. Tujuan dari penelitian ini adalah mendesain, membuat, dan menguji kinerja end-effector pemindah bibit cabai merah dari tray semai menuju pot tanam. Penelitian ini terdiri dari beberapa tahap, yaitu: identifikasi masalah, desain dan analisis struktur komponen, gambar teknik, perakitan prototipe, serta uji fungsional dan kinerja prototipe. End-effector dibuat menggunakan tiga jari grip dari alumunium yang ramping untuk menghindari kerusakan pada bibit yang dipindahkan. Pengujian dilakukan dengan cara endeffector ditempatkan pada meja uji dan digerakkan secara manual untuk menjangkau bibit. Motor DC 12V 285 rpm digunakan untuk membuka dan menutup jari grip. Ukuran end-effector yang dibuat adalah 198 x 53 x 53 mm. Media semai yang digunakan adalah media siap pakai dan arang sekam. Keberhasilan pada media siap pakai adalah 72% dan pada media arang sekam sebesar 60%. Waktu rata-rata pemindahan satu bibit adalah 17 detik.
Keyword: cabai merah, end-effector, tray semai

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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