Judul: Studi pola penggunaan ruang dan populasi kuda liar (Equus caballus) di Pulau Rinca, Taman Nasional Komodo Nusa Tenggara Timur
Abstrak: Kuda liar (Equus caballus) adalah binatang yang terdapat di Taman Nasional Komodo. Binatang ini merupakan salah satu daya tarik Taman Nasional Komodo dan menjadi salah satu tujuan pariwisata. Keberadaan satwa di suatu tempat sangat dipengaruhi oleh ketersediaan makanan, ada tidaknya musuh di suatu tempat, dan faktor-faktor kenyamanan lainnya seperti suhu, dan posisi suatu tempat yang mempengaruhi keberadaan satwa tersebut. Tujuan dari penelitian ini adalah untuk mengetahui pola penggunaan ruang dan populasi dari kuda liar (Equus caballus), di Pulau Rinca, Taman Nasional Komodo, Nusa Tenggara Timur. Metode yang digunakan dalam penelitian ini adalah dengan menggunakan metode Point Transect. Parameter pengamatan adalah waktu pengamatan, jumlah individu per kelas umur, posisi satwa (lembah lereng dan puncak) dan tipe vegetasi yang digunakan satwa dalam melakukan kegiatannya (savana, hutan musim dan mangrove). Untuk vegetasi dilakukan analisis vegetasi dengan menggunakan metode jalur berpetak.
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Judul: Studi pola penggunaan waktu populasi kuda liar (Equss caballus) di pulau Rinca, Taman Nasional Komodo, Nusa Tenggara Timur
Abstrak: Kuda liar (Equus caballus) merupakan salah satu daya tarik wisata dan menjadi obyek wisata di Taman Nasional Komodo. Dalam rangka mencapai keberhasilan pengelolaan populasi kuda liar dibutuhkan pengetahuan mengenai pola perilakunya terutama yang menyangkut alokasi waktu dan penyebaran temporal aktivitas kuda liar. Dengan adanya informasi mengenai alokasi waktu aktivitas maka dapat dikembangkan teknik pengelolaan habitat yang tepat untuk mendukung pertumbuhan dan kelestarian populasi kuda liar. Disamping itu informasi mengenai penyebaran temporal aktivitas akan bermanfaat bagi penentuan waktu pengamatan dan penghitungan jumlah populasi yang tepat sesuai perilaku alaminya. Penelitian ini bertujuan untuk mengetahui alokasi waktu dan penyebaran temporal aktivitas kuda liar serta variasi bulanannya menurut jenis kelamin dan kelas umur di Pulau Rinca, Taman Nasional Komodo, Nusa Tenggara Timur. ...
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Judul: Enhancement of photon absorbtion on BaxSr1-xTiO3 thin films semiconductor using photonic crystals.
Abstrak: In this research, has been conducted BaxSr1-xTiO3 (BST) thin films manufacturing for mole fraction x = 0.25, 0.35, 0.45, and 0.55; and concentration of 1 molar using chemical solution depositon (CSD) method. The materials, which are used in this research, are barium acetate [Ba(CH3COO)2, 99%], strontium acetate [Sr(CH3COO)2, 99%], titanium isopropoxide [Ti(C12O4H28), 97.999%], gallium trioxide [Ga2O3], 2-methoxyethanol [H3COOCH2CH2OH, 99%] and 1 x 1 cm of transparent conductive oxide (TCO) glass as substrate. Two BST thin films are made that for BST thin films which are doped by 10% galium (BGST) as p-type layer and pure BST solution as n-type. BST solution is made by reacting barium acetate [Ba(CH3COO)2, 99%], strontium acetate [Sr(CH3COO)2, 99%] and titanium isopropoxide [Ti(C12O4H28)] into 2-methoxyethanol solvent [H3COOCH2CH2OH, 99%] in accordance with mass gram for each x value. While, BGST solution is made in the same way as BST solution, plus adding gallium at 10% of the mass of BST. Once all materials are reacted, then vibrated using ultrasonic for 90 minutes, and followed by coating BGST / BST on the TCO substrate. Once the layer is formed, then annealed for 15 hours at temperature of 500 °C with increasing rate of 1.67 oC/minute. Characterizations of BST thin films with or without photonic crystals include the absorbance and transmittance in the visible light spectrum, as well as the electrical photoconductivity characterizations. From BST thin films without photonic crystals indicate that our thin films have light absorption area on almost the entire range of the visible light spectrum even to the infrared range with absorption value over than 67.6%, in addition, it can be seen that the maximum absorbance of BST thin films for all mole fractions lie in blue to green light spectrum region, 457 nm ≤ λ ≤ 570 nm and the minimum in yellow to red light spectrum region, 570 nm ≤ λ ≤ 678 nm. The largest absorbance is found at x = 0.25 with average absorbance value of 92.04% and maximum and minimum absorbance peaks at wavelength of 500.89 and 657.72 nm, respectively. At x = 0.35, average absorbance value decreased to 83.55% with maximum and minimum peaks at 505.73 and 613.68 nm, respectively. Then increased to 91.16% at x = 0.45 with maximum and minimum peaks at 506.04 and 618.56 nm, respectively. At x = 0.55, average absorbance value decreased to 80.12% with maximum and minimum peaks at 507.85 and 608.79 nm, respectively. Moreover, it can be seen that the addition of barium mole fraction leads to wider maximum absorbance or minimum transmittance peaks and narrower minimum absorbance or maximum transmittance peaks in the same range of the green and blue & red light spectrums, respectively. BST thin films with photonic crystals show increasing in absorption for all x values in the range of 3.04 into 13.33%. At x = 0.25, average absorbance percentage increased 3.96% from 92.4 into 95.68%, for x = 0.35 average percentage increased 7.07% into 89.45 from 83.55%. Furthermore, average absorbance of BST thin films at x = 0.45 increased 3.04% from 91.16 into 93.93% and x = 0.55 has
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