Judul: Pengembangan Algoritma Pengolahan Citra pada Sistem Netra Mesin 3d (3d Machine Vision) untuk Robot Pemetik Kelapa Sawit (Elaels sp.)
Abstrak: A3D machine vision system was made using a digital camera, including image processing Algoritm to identify the objects, to determine the maturity level and cutting point object, to analize object position and vertical inclining
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Judul: Rancang Bangun Sistem Stereo Vision untuk Manipulator Robot Pemanen Cabai Merah
Abstrak: Sistem vision pada robot pemanen pertanian berfungsi untuk mengidentifikasi buah matang yang akan dipanen dengan cara memisahkan citra buah dari latar. Posisi tiga dimensi buah tersebut dapat ditentukan dengan metode pengukuran triangulasi dan dijadikan koordinat tujuan bagi manipulator untuk pemanenan. Tujuan dari penelitian ini adalah merancang sebuah sistem penentuan posisi tiga dimensi dengan stereo vision yang dapat menghitung secara langsung koordinat sebagai input bagi manipulator robot pemanen buah secara otomatis. Penelitian ini meliputi perancangan sistem stereo vision, penentuan parameter warna, kalibrasi jarak, pengembangan program pengolahan citra dan pengendalian manipulator, serta pengujian sistem stereo vision dan pengendalian manipulator berdasarkan input dari stereo vision. Hasil pengujian menunjukkan sistem stereo vision pada penelitian ini dapat digunakan untuk mengidentifikasi buah cabai yang matang (merah) serta menentukan posisi tiga dimensinya untuk dijadikan input pengendalian manipulator secara otomatis. Hasil uji kinerja penentuan posisi tiga dimensi oleh sistem stereo vision menunjukkan akurasi jarak rata-rata pada satu, tiga, dan lima buah cabai terdeteksi adalah 94,10%, 97,16%, dan 97,70%. Hasil uji kinerja pengendalian manipulator berdasarkan input dari stereo vision menunjukkan akurasi jarak rata-rata pada satu, tiga, dan lima buah cabai terdeteksi adalah 95,02%, 98,29%, dan 94,23%., The vision system on the agricultural harvester robot serves to identify ripe fruit to be harvested by separating the fruit image from the background. The three-dimensional position of the fruit can be determined by the triangulation measurement method and used as destination coordinates for the manipulator for harvesting. The purpose of this research is to design a three-dimensional positioning system with stereo vision that can calculate coordinates directly as input for automatic fruit harvesting robot manipulators. This research includes stereo vision system design, color parameter determination, distance calibration, development of image processing and manipulator control programs, as well as stereo vision system testing and manipulator control based on input from stereo vision. The test results show that the stereo vision system in this study can be used to identify ripe chili fruits (red) and determine their three-dimensional position to be used as input for automatic manipulator control. The results of the three-dimensional positioning performance test by the stereo vision system showed that the average distance accuracy on one, three, and five chili peppers detected was 94.10%, 97.16%, and 97.70%. The results of manipulator control performance tests based on input from stereo vision showed the average distance accuracy on one, three, and five chili peppers detected was 95.02%, 98.29%, and 94.23%.
Keyword: chili, design, stereo vision, three-dimensional positioning

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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