Judul: Metode Neraca Energi Untuk Perhitungan Radiasi Transmisi Menggunakan Data Citra Landsat ETM+
Abstrak: Radiation transmission is needed for forest vegetation especially for the ecosystem under canopies. Quantity of radiation which could reach into the surface of forest influences chemical, physical, and physiological processes of plants like photosynthesis, transpiration, and respiration. The object of this study is analyzing factors that effect magnitude of radiation transmission in some land covers using Landsat ETM+ images and mapping distribution of radiation transmission. The image was classified into three land covers of vegetation. Those are natural forest, planted forest and shrub. Information of surface temperature was extracted from band 6 (wavelength : 10.40-12.50μm); component of surface energy was extracted from band 1 (0.45-0.52 μm), band 2 (0.52-0.60 μm), and band 3 (0.63-0.69 μm); and calculated absorbtion and reflection of radiation to estimate radiation transmission. Radiation transmission of natural forest in 2000 is 257 Wm-2, planted forest is 247 Wm-2, and shrubs is 231 Wm-2. While in 2001, radiation transmission of natural forest is 129 Wm-2, planted forest is 112 Wm-2, and shrubs is 104 Wm-2. Radiation transmission in 2000 was higher than in 2001 because of differences of zenith angle and distance of the sun to the earth in both of satellite data that used.
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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: Karakteristik Anatomi Skelet Kepala Buaya senyulong (Tomistoma schlegelii).
Abstrak: Buaya sepit atau senyulong (Tomistoma schlegelii) merupakan jenis buaya asli Indonesia yang berhabitat di sungai-sungai Sumatera, Kalimantan, dan juga pedalaman Sulawesi. Salah satu ciri khas buaya senyulong adalah bentuk moncong yang runcing dan sempit, namun hingga saat ini informasi mengenai struktur skelet kepala buaya senyulong sangat terbatas. Penelitian ini bertujuan untuk mempelajari karakteristik anatomi skelet kepala buaya senyulong yang dikatikan dengan fungsi dan perilakunya. Penelitian dilakukan secara eksploratif dengan melakukan pengamatan, pencatatan, dan pengambilan gambar dari skelet kepala buaya senyulong. Skelet kepala berukuran panjang 70 cm, lebar 29 cm, dan tingggi 17 cm dengan permukaan kasar pada os nasale, os frontale, os maxilla, os mandibula, os lacrimale, os jugale. Jumlah gigi pada buaya ini sebanyak 78 buah, terdiri dari 4 buah gigi premaxila, 16 buah gigi maxila, dan 19 buah gigi mandibula. Pada regio orbitalis ditemukan dua pasang fenestrae temporales yang berkembang baik. Fenestra supratemporale merupakan lubang oval yang membentang di sepanjang os parietale. Fenestra infratemporale berbentuk segitiga dan dibatasi oleh os squamosum, os postorbitale, os jugulare, dan os quadratum. Os mandibula hewan ini mempunyai symphysis mandibularis yang panjang yaitu garis yang melintang di corpus mandibulae. Secara fungsional ukuran symphysis mandibularis berkaitan dengan adaptasi hewan terhadap diet makan.
Keyword: kepala, moncong, Tomistoma schlegelii