Judul: Aktivitas apis cerana mencari polen dan identifikasi polen di perlebahan tradisional di Bali
Abstrak: Apis cerana is the most important Asian honey bee in traditional apiaries in West Bali Forest. The research aimed tot study the daily pollen collection activity of A. cerana and pollen identification from traditional apiaries in two villages around West Bali forest forest (Sumber Klampok and Melaya). On every 10 minutes, A. cerana which returning to the hive was counted with interval 20 minutes. Counting started at 05.20 and terminated at 18.30 h. Pollen was collected using pollen trap and then processed with acetolysis.The activity of A. cerana lasted for 12.5 h, was started at 05.50 and terminated at 18.30. A. cerana daily activities were varied among colonies. The peak pollen collection in Melaya occurred at 07.20-09.20 h which was earlier than that of in Sumber Klampok which occurred at 10.20-14.50 h. In general, the daily activity of A. cerana in Melaya represented the traditional apiaries in Bali. The daily activity of A. cerana in Sumber Klampok was more affected by weather than that of in Melaya. In all colonies, 19 pollen types from 12 families were found, and 3 types were unable to be identified. Coconut pollen (Cocos nucifera) and Leucaena leucocephala were dominantly collected in all colonies. Daily pollen collecting activities were correlated with number of pupae in colony
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Judul: Aktivitas apis cerana mencari polen dan identifikasi polen  di perlebahan tradisional di Bali
Abstrak: Masyarakat disekitar hutan Bali Barat banyak beternak A. cerana secara tradisional. Perlebahan tradisional menggunakan kotak kayu sebagai sarang A. cerana dan digantungkan pada pohon dengan ketinggian 2-8 m. Tiap sisir sarang menempel pada dinding atas kotak sarang. Pada saat panen madu peternak mengambil semua sisir. Desa yang dekat dengan hutan alami adalah tempat baik untuk peternakan lebah, karena di hutan alami banyak tumbuhan penghasil pakan lebah. Hutan Bali Barat merupakan salah satu hutan alami yang kondisinya masih baik dan dikelola oleh Taman Nasional Bali Barat dan Dinas Kehutanan Propinsi Bali. Penelitian ini bertujuan untuk mempelajari kisaran waktu aktivitas mencari polen pada tiap koloni A. cerana, mengidentifikasi polen yang dibawa A. cerana kembali ke sarang, mengetahui hubungan aktivitas mencari polen dengan jumlah pupa dalam sarang A cerana di perlebahan tradisional A. cerana di sekitar hutan Bali Barat. Manfaat dari penelitian ini adalah membuat database polen tumbuhan di sekitar perlebahan A. cerana dan mendukung konservasi lingkungan tumbuhan di hutan Bali Barat.
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Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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