Judul: Pendugaan Hubungan Kondisi Topografi dengan Radiasi Spektral Citra Satelit TERRA MODIS L1B (Studi Kasus: Gunung Gede dan Gunung Salak)
Abstrak: The objectives of this research are estimate the spectral radiation relationship with the topography on forest land cover and analyze the relationship of surface temperature between altitude on forest land cover in the area of Mount Salak and Mount Gede derived from MODIS TERRA L1B imagery at long wavelength channel (spectral radiation emission ). Surface temperature derived from TERRA MODIS L1B data, it use channel 31 and 32 with a wavelength of 10.780 to 11.280 and 11.770-12.270 . Spectral emission of radiation (longwave thermal) response topography indicated by the correlation coefficient of -0.5 to -0.9 while the spectral reflectance of radiation (short wave) did not respond to the topography shown by fluctuations in the value of the correlation coefficient with a range of -0.7 to 0.3. TERRA MODIS L1B image data indicated by the response to topography radiation emission spectral response of the altitude. Based on data derived from MODIS TERRA L1B image is obtained inversely proportional relationship between the temperature of the surface topography. Highest value of surface temperature and the lowest occurred in September and May. With the same land cover (forest), solar zenith angle affects the surface temperature value. In addition, there are many other factors that affect the surface temperature, some of which are atmospheric effects (emission and scattering), the latitude and air density. MODIS sensor can respond to topography due to the influence of the moist air density and specific heat of air varies with altitude and pressure.
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Judul: Penyusunan Metode untuk Menduga Nilai Radiasi Absorbsi dengan Menggunakan Citra Landsat TM/ETM+ (Studi Kasus Hutan Gunung Walat Sukabumi)
Abstrak: The purpose of this study is to predict the short-wave radiation values which is absorbed by using Landsat ETM + satellite imagery and software Gap Light Analyzer (GLA). Equilibrium radiation at the forest vegetation is ρ + τ + α = 1, where α is the proportion of solar radiation flux density absorbed by unit leaf area index, ρ is the proportion of flux density solar radiation reflected by a unit of leaf area index or canopy, and τ is proportion of solar radiation flux density transmitted by the unit leaf area index (Impron, 1999). The amount of transmission and reflection depending on the angle of solar radiation (Monteith, 1972). Radiation values components in Walat Mount Forest is short wave radiation value of 48 Wm-2, the transmission value is obtained by using the formula ρ + τ + α = 100% value of 89 Wm-2, and transmission value using the GLA is 100 Wm-2. Radiation absorption value in Walat Mountain is obtained using two methods, the first method is obtained using Kirchoff law approach of radiation absorption which value of 388 Wm-2 and the second is using the GLA which value of 377 Wm-2.
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Judul: Desain Mekanisme Pengatur Bibit Nanas untuk Mesin Tanam Nanas.
Abstrak: Penanaman bibit nanas pada saat ini masih dilakukan secara manual dengan kapasitas rendah dan hasil penanaman yang kurang baik. Untuk memperbaiki hal itu, diperlukan mesin tanam nanas berkapasitas tinggi dengan hasil penanaman yang baik. Dalam mesin tanam nanas di mana bibit tertumpuk dengan posisi yang tidak beraturan, diperlukan mekanisme untuk mengatur posisi orientasi bibit nanas dan juga mengumpankan bibit nanas dalam posisi berdiri untuk ditanam. Tujuan dari penelitian ini adalah untuk merancang mekanisme pengatur bibit nanas tipe sucker untuk mesin tanam nanas. Mekanisme yang dirancang ini terdiri dari: 1) mekanisme pembawa bibit dari hoper bibit sekaligus memposisikannya secara tertidur satu persatu, dan 2) mekanisme pengumpan bibit dalam posisi berdiri. Mekanisme ini dirancang untuk dapat mengumpankan bibit dengan kecepatan 5.54 detik per bibit, dan unit conveyor pengarah bibit dirancang dengan kecepatan 0.081 m/s. Hasil pengujian prototipe mekanisme pengarah bibit ini menunjukkan bahwa conveyor pengarah bibit mampu membawa bibit, dan mengaturnya dalam posisi tertidur sebanyak 89.67 %. Unit penegak bibit dapat mengumpankan bibit dalam posisi berdiri sebanyak 92%. Mekanisme pengarah ini mampu mengumpankan bibit dengan kecepatan rata-rata 10.8 bibit per menit.
Keyword: Bibit nanas, conveyor, desain, mekanisme pengatur, mesin tanam