Judul: Revision of Calamus and Daemonorops (Arecaceae) in Sulawesi
Abstrak: The rattans of Sulawesi presented by three different genera Calamus, Daemonorops and Korthalsia. Calamus and Daemonorops belong to subtribe Calaminae whereas Korthalsia belongs to subtribe Korthalsiinae. In Sulawesi Calamus is the biggest rattan genus with the number of species more than 23. This genus is very common tropical genus with the centre of diversity is in South East Asia. In Sulawesi Daemonorops consist of 7 species, whereas Korthalsia has one species only that is K. celebica, endemic species to Sulawesi. Recently the biodiversity of Sulawesi has been under severe threats caused by increasing large scale deforestation projects. Many commercial rattans has been illegally harvested and used as raw material for rattans industry. This alarming fact has ecological impact to the rattans of Sulawesi in the form of imminent massive of biodiversity lost. This situation is very true especially for the rattans because almost all species are climbers and they need trees to support their existence. With the intention to minimize the thread to the existence of the rattans of Sulawesi, basic study on the rattans taxonomy is needed as well as accurate documentation. Definite species delimitation is essential to be studied as the diversity continuously under threats and decreased.
Keyword: Sulawesi, Calamus, Daemonorops, Korthalsia, Korthalsia celebica

Judul: Keragaan Rotan di Areal Konservasi Ex-Situ Hutan Pendidikan Gunung Walat Sukabumi, Jawa Barat
Abstrak: Ex-situ conservation stands has been established in Gunung Walat University Forest (GWUF) since 2005. However, the performance of rattan has never been evaluated. The objectives of the research were i) to review the correct species name of rattan and ii) to assess the growth variation of rattan with respect to shade trees, environmental factors (light and pest). The growth performance was observed through assessment of species composition and structure of the stand including distribution of diameter and length, biomass estimation and environmental effects (light and pest). The results showed that i) there were 3 (three) rattan species planted in the ex-situ conservation stand, namely Calamus manan, Daemonorops melanochaetes and Daemonorops rubra, ii) The composition and structure of the stands were still dominated by the shade trees. Rattan was found predominantly at strata C (4–20 m) and strata D (1–4 m). The normal distribution was observed only on diameter and length of C.manan and D.melanochaetes, respectively. The highest biomass was observed in D. rubra that was estimated as much as 26.6 tons/ha. The light had significant effect on D.rubra diameter only. On the other hand, pest had no significant effect on rattan growth variables.
Keyword: rattan, growth performance, ex-situ conservation

Judul: Pemanasan Sekunder Reaksi Fusi Plasma dengan Menggunakan Radio Frequency
Abstrak: Plasma merupakan bentuk ke-empat dari materi setelah padat, cair dan gas yang terbentuk dari proses ionisasi gas. Plasma dapat digunakan dalam reaksi fusi, yaitu reaksi penggabungan dua inti atom ringan menjadi inti atom yang lebih berat sambil melepaskan energi. Untuk mendapatkan energi dari reaksi fusi, inti yang akan direaksikan harus dipanaskan pada temperatur yang sangat ekstrem tingginya. Salah satu cara agar dapat mencapai kondisi ini adalah memberikan pemanasan tambahan atau pemanasan sekunder kepada plasma dalam reaksi fusi tersebut. Nilai daya serap rata-rata ion Deuterium yang sesuai dengan selang nilai daya dari data ITER adalah daya yang menggunakan frekuensi 50 MHz sampai dengan 60 MHz. Dengan menggunakan frekuensi 60 Hz diperoleh nilai daya rata-rata yang diserap sebesar 1,235.10-12 W.
Keyword: gelombang radio, pemanasan sekunder, plasma, reaksi fusi