Judul: Keanekaragaman Cocopet (Ordo Dermaptera) Pada Bunga Jantan Kelapa Sawit di Kebun Cimulang PTPN VIII Bogor
Abstrak: Earwigs (Dermaptera) is omnivorous insect. One of the habitat of the earwigs is in the male flowers of oil palm. The objective of this research was to study diversity of earwigs in male flowers of oil palm. The observations were conducted during 10 minutes by fix sample method. Observation were done in four days per month, ie. April, May, and June 2012. Species and individual number of earwigs were recorded. The weather elements, ie. temperature, humidity, and light intensity were measured. Results showed that earwigs in male flowers of oil palm consist of three species, namely Chelisoches sp., Forficula sp., and Labia sp. C. morio was the dominant earwig in male flowers of oil palm. Diversity of earwigs in male flowers of oil palm was low (H '= 0,83 and E = 0,75).
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Judul: Keragaman Serangga Pengunjung Bunga Jantan Kelapa Sawit .. (Elaeis guineensis Jacq.)
Abstrak: Oil palm (Elaeis guineensis Jacq.) is one of the plantation crops that became the source of non-oil foreign exchange earner in Indonesia. Oil palm is monoecious plant, in which the same tree bears male and female flowers. Generally a male and female flowers do not bloom simultaneously. Consequently, cross-pollination with weevils help is needed. A weevil species, Elaeidobius kamerunicus is an effective pollinating insect of oil palm because it is specific and well adapted either in wet or dry seasons. The objective of this research was to study the diversity of insects that visit male flowers of oil palm besides E. kamerunicus. The observations were conducted during three days in each month, ie May, June and July 2011 for 10 minutes using fix sample method. During the observation, the name and the number of individual species of insects visiting the male flowers of oil palm were recorded. Performance of weather elements, ie temperature, humidity, and light intensity were measured. Further, insects identification were conducted in the laboratory. Results showed that, besides E. kamerunicus, in PTPN VIII, AFD IV Toge, Garden Cikasungka Bogor were found Rhynchomyia, Scaptodrosophila (Diptera), Diplatys, Forficula (Dermaptera), Camponotus, Dolichoderus, Cerapachys, Crematogaster, and Heteroponera (Hymenoptera). Scaptodrosophila was the dominant visitor insect. Dermaptera and Hymenoptera were predatory insects. The diversity and evennes of insects visiting male flowers of oil palm were low (H’ = 0,59 and E = 0,27).
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Judul: Massa Graviton Berdasarkan Teori De Rham- Gabadadze-Tolley Dalam Model Alam Semesta Datar Friedmann-Lemaitre- Roberson-Walker
Abstrak: Teori Relativitas Umum memprediksi ekspansi alam semesta diperlambat, sedangkan hasil observasi supernova tipe Ia mendapati ekspansi alam semesta dipercepat. Teori Relativitas Umum dimodifikasi melalui pendekatan teori gravitasi bermassa nonlinier oleh de Rham-Gabadadze-Tolley (dRGT). Massa graviton dimunculkan untuk dinamika skala sangat besar. Persamaan medan Einstein teori dRGT dapat dirumuskan dari prinsip variasi. Selanjutnya dengan memilih metrik datar Friedmann-Lemaitre-Roberson-Walker dapat diformulasikan bentuk persamaan Friedmann yang relevan dengan model ekspansi dipercepat. Hasil akhirnya, dengan membandingkan massa graviton dari metode Extremely Low Energy (ELE) dapat dihitung massa kritis graviton yaitu sekitar - . .
Keyword: massa graviton, teori dRGT, persamaan medan Einstein, persamaan Friedmann, ekspansi alam semesta dipercepat