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: Analisis wilayah jelajah harian kuda liar (Equus caballus Linnaeus) di Pulau Rinca, Taman Nasional Komodo
Abstrak: Kuda liar (Equus caballus) di P. Rinca, TN. Komodo merupakan kuda "feral". Secara ekologis kuda liar ini merupakan mangsa bagi komodo. Keberadaan kuda liar di P. Rinca ini perlu dilestarikan dan dikelola dengan baik, sehingga dapat berperan baik sebagai daya tarik wisatawan maupun kelangsungan ekosistem. Untuk mencapai keberhasilan pengelolaan spesies ini, diperlukan data tentang bio-ekologi kuda liar. Namun demikian hasil-hasil penelitian tentang kuda liar masih relatif terbatas. Oleh karena itu perlu adanya penelitian tentang bio-ekologi, yang salah satunya adalah wilayah jelajah kuda liar. Penelitian ini bertujuan untuk mengetahui luas wilayah jelajah harian kuda liar, panjang lintasan pergerakan harian kuda liar, dan karakteristik habitat kuda liar. Hasil penelitian diharapkan dapat digunakan sebagai informasi dasar bagi pihak pengelola Taman Nasional Komodo untuk pengelolaan habitat kuda liar dan pelestariannya. Penelitian dilakukan di Pulau Rinca, Taman Nasional Komodo, Nusa Tenggara Timur, antara Maret Mei 1996. Pengamatan dilakukan pada satu kelompok kuda liar yang ada di Loh Kima. Metode pengamatan yang digunakan adalah scan sampling dengan interval waktu 20 menit, secara time series yakni pagi (06.00-10.00 WITA), siang (10.00-14.00 WITA) dan sore (14.00-18.00 WITA). Parameter yang diukur dan diamati adalah: 1). Panjang lintasan pergerakan harian, 2). Luas wilayah jelajah harian, 3). Frekuensi aktivitas, 4). lama perjumpaan, dan 5). Karakteristik habitat. Hasil penelitian menunjukkan bahwa panjang lintasan pada periode pagi hari 695 ±278 m, siang hari 301 ± 98 m dan sore hari 560 ± 146 m. Panjang lintasan harian sejauh 1.616 ± 1.267 m.
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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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