Judul: Perkembangan Jumlah Rayap, Mortalitas, dan Kemampuan Makan Rayap pada Pengujian Laboratorium
Abstrak: The utilization of wood has been increases in accordance with population growth. One of the imperative properties of wood is durability. It is needed a testing with certain standard beside of SNI 01.7207-2006 so that the result will be accurate. The objectives of this research were to understand the time of durability testing of wood efficiently, and to understand the growth of subterranean termites Coptotermes curvignathus Holmgren, mortality, and feeding rate. There were two methods A method (SNI 01.7207-2006), the samples size was equalized whereas in B method, samples weight equalized. In B method, the rubber wood samples gave stable growth of termites at the estimation 79 termites after 36 days whereas albizia wood, there were no colonies at 78th days. Weight loss which was had by albizia wood was lowest than rubber wood. In a week, A method for albizia and rubber woods, termites were able to feed wood as much as 0.36 g, whereas B method the wood eaten for rubber wood was higher than albizia wood which was 0.16 g. The result of the research revealed that rubber wood was more favorable by subterranead termites.
Keyword: SNI 01. 7207-2006, Hevea brasiliensis, Falcataria moluccana, Coptotermes curvignathus

Judul: Preference of Sutterranean Termites to Several Species of Community Wood from Bogor, West Java
Abstrak: Perlu upaya diversifikasi kayu tusam sebagai kayu umpan. Selain itu lama waktu pengumpanan menjadi pertimbangan dalam melakukan pengumpanan. Penelitian ini bertujuan untuk mengevaluasi preferensi rayap tanah terhadap beberapa jenis kayu rakyat dari Bogor dan mengetahui lama waktu terbaik dalam pengumpanan. Kayu yang diuji yaitu Acacia mangium, Paracerianthes falcataria, Anthocephalus cadamba, Maesopsis eminii, Swietenia mahagoni, Hevea brasiliensis, Pinus merkusii. Uji lapang dilakukan berdasarkan American Society for Testing and Material D 1758-06 di Arboretum, Fakultas Kehutanan dan Lingkungan IPB dengan waktu pengumpanan satu sampai enam bulan. Hasil penelitian menunjukkan bahwa, frekuensi serangan rayap pada tapak pengujian sebesar 93,1%. Rata-rata kehilangan berat tertinggi yaitu karet (65,8%) dan terendah yaitu mahoni (7,1%). Semua jenis kayu yang diuji, kecuali mahoni, berpotensi menjadi alternatif umpan rayap. Jenis rayap yang ditemukan adalah Microtermes sp,. Macrotermes sp., Shedorhinotermes sp., dan Capritermes sp., Pine wood requires diversification as bait wood. Also, baiting period is an important consideration for the baiting process. The objectives of this research were to study the termites preference towards several types of community wood from Bogor and to know the best baiting period in baiting process. Wood that has been tested were Acacia mangium, Paracerianthes falcataria, Anthocephalus cadamba, Maesopsis eminii, Swietenia mahagoni, Hevea brasiliensis, and Pinus merkusii. The field tests were carried out according to American Society for Testing and Material D 1758-06 at the Arboretum of Faculty of Forestry and Environment of IPB University with baiting period of one to six month. The results showed that the frequency of termite attacks was 93,1%. The highest average of the weight loss was rubber (65,8%) and the lowest was mahogany (7,1%). All types of wood that have been tested, except mahogany, have the potential to be an alternative for the termite bait. The type of termites found was Macrotermes sp, Microtermes sp., Shedorhinotermes sp., and Capritermes sp.
Keyword: Attack frequency, weight loss, damage intensity, bait period, termite bait

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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