Judul: Penddugaan nilai radiasi di jenis tutupan lahan hutan dengan aplikasi remote sensing: studi kasus hutan penelitian dan pengembangan kehutanan departemen kehutanan dan Kebun Raya Bogor
Abstrak: Tujuan penelitian ini adalah mengaplikasikan teknik remote sensing untuk menduga nilai radiasi yang meliputi radiasi datang, radiasi pantul, radiasi absorbsi dan transmisi pada hutan. Kisaran nilai albedo yang didapatkan untuk hutan adalah 0.06 – 0.09. Nilai radiasi refleksi yang didapatkan untuk hutan penelitian dan pengembangan kehutanan, Bogor adalah 56.5 W/m2. Nilai radiasi refleksi yang didapatkan untuk kebun raya bogor pada saat pengambilan data adalah 57.16 W/m2. Dengan memanfaatkan informasi pantulan energi yang direkam oleh sensor satelit dan nilai albedo dengan beberapa parameter perhitungan yang digunakan, didapatkan nilai radiasi gelombang pendek yang diterima permukaan saat pengukuran sebesar 613.39W/m2 dan radiasi selama satu hari dengan assumsi pola radiasi sinusoidal sebesar 17.46 MJ/m2. Nilai suhu permukaan dengan rata rata 26.54 oC di Kebun Raya Bogor dan 27.03oC di hutan CIFOR, diturunkan dari informasi yang direkam sensor thermal. Selanjutnya nilai radiasi gelombang panjang yang dipantulkan permukaan didapatkan dari nilai suhu permukaan dengan menerapkan hukum Stefan Bolzman. Dengan menggunakan informasi nilai radiasi datang, nilai radiasi pantul, nilai radiasi gelombang pendek yang dipantulkan selanjutnya dilakukan perhitungan nilai Radiasi netto dan Nilai radiasi yang diserap dan ditransmisi. Nilai radiasi yang diserap dan ditransmisikan untuk hutan penelitian dan pengembangan kehutanan, Bogor adalah 553.18 W/m2. Nilai radiasi yang diserap dan ditransmisikan kebun raya bogor pada 22 Desember 2001 adalah 552.66 W/m2.
Keyword: Remote sensing, Radiation, Albedo, Electromagnetic wave

Judul: Pendugaan nilai komponen neraca energi di kanopi hutan tanaman agathis loranthifolia dengan menggunakan satelit optik (Studi kasus Hutan Gunung Walat Sukabumi)
Abstrak: The process of absorption, reflection and transmission of radiation at the plant area will cause changes in the spectrum of solar radiation at the top, middle and bottom canopy (June, 1993). Next Odum (1970) suggests that many plants that grow in the shade of other plants which will be the quality of different spectral direct solar radiation, which causes a reduction in the amount of radiation received by the leaf surface compared with those leaves receiving direct solar radiation. This situation has important implications for the plants that grow beneath a thick canopy such as: the plants in the forest floor. This study tries to apply satellite remote sensing techniques and combined with the capture of field data have been processed before by using GLA software (Gap Light Analyzer) to estimate the value of the transmitted radiation by the canopy of plants. Value of net radiation received by the canopy of the forest areas of 51 Wm-2, the value of short-wave radiation reflected by the canopy of the forest areas of 48 Wm-2. The value range of the transmitted radiation calculations using GLA software is for 19% of short-wave radiation coming. This value is the direct radiation into the forest canopy with no obstructed by canopy cover. Determining the value of the transmitted radiation is strongly influenced by the quality of the image so that the required use of digital cameras that have lenses with a high acuity.
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Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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