Judul: Perubahan Struktur dan Keanekaragaman Coleoptera pada Sistem Agroforestri Kakao: Pengaruh Umur dan Tataguna Lahan di Daerah Lore Lindu, Sulawesi Tengah
Abstrak: The conversion of forest to agricultural areas is usually associated with loss in biodiversity and its associated ecosystem services. However, some agricultural system such as agroforestry can conserve biodiversity through supporting suitable habitat which are similar to natural condition. The aim of this research is to study community structure of Coleoptera in cacao agroforestry system with emphasize on the effect of age and habitat condition surrounding cacao plantation. Ecological research was conducted in cacao plantation in Central Sulawesi with different type of shade trees i.e remaining forest trees (plot B), planted trees with diverse species (plot C) and planted trees with only 1 or 2 species (plot D). This research monitors the changes of biodiversity that had been conducted in 2003 and resampled in 2009 with the same method in the same plots as well as the same sampling time. In each agroforestry types, four trees were sampled and all the Coleoptera were collected using fogging method. The result of the research showed that the species richness of Coleoptera from three types of agroforestry decreased in composition and structure among the two time period. In 2003, there were 172 species compared to 111 species in 2009. However, there are not significant different between 2003 and 2009 species composition based on analysis of variance using Shannon index. In contrast, similarity analysis using Sorenson index showed that the species composition changed between 2003 and 2009. Age of cacao trees have important role on changing Coleoptera species composition. In addition, habitat condition with natural forest may support Coleoptera diversity in cacao plantation.
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Judul: Function Of Some Ecosystem Components At Natural Forest And Cacao Agroindustry Sustem At The Margin Of Lore Lindu National Park, Central Sulawesi
Abstrak: Cacao agroforestry is a traditional form of agriculture practiced by the people of Central Sulawesi. These agroforestry systems vary from a simple system, following selective cutting of forest trees, to a more sophisticated planting design. The aims of this research were (1) to determine litterfall dynamics, leaf-litter decomposition, and fine root biomass, (2) to determine active fraction on soil macro-organic matter (SOM) in natural forest and cacao agroforestry systems, and (3) to assess nitrogen resorption and nitrogen use efficiency (N NUE) and implication for cacao establishment. The field studies were conducted in three types of cacao agroforestry systems at the northeastern margin of Lore Lindu National Park (LLNP). Field study sites covering in natural forest (NF) and in three cacao agroforestry systems that is cacao was planted under remaining forest cover (CF1), under planted trees (CF2), and between shade trees Gliricidia sepium (CP). The parameters are nitrogen soil content, fine root biomass, soil macro-organic matter by size and density fractionation, soil surface organic layer by quadrant, litterfall production by litter trap, and rate of decomposition by litter bag, nitrogen use efficiency in cacao plant and ecosystem scale, and nitrogen resorption.
Keyword: litterfall dynamics, leaf-litter decomposition, find-root biomass, nitrogen resorption, Central Sulawesi

Judul: Pemanasan sekunder plasma menggunakan gelombang mikro untuk reaksi fusi terkontrol
Abstrak: elah diteliti pengaruh pemanasan sekunder pada plasma dengan menggunakan gelombang mikro, yang dijalarkan tegak lurus dengan medan magnetik toroidal dalam tokamak. Didapat nilai numerik daya P =ψψm ≈ 1,305×10-15 W/m3 yang diserap oleh elektron per volume terhadap pemanasan sekunder menggunakan gelombang mikro yang penjalarannya tegak lurus dengan arah medan magnetik toroidal. Nilai yang kecil menunjukkan nilai rerata terhadap banyaknya partikel dalam plasma. Adapun diperolehnya nilai radius rm ≈ 1m yang mendapat nilai serapan terbesar menunjukkan bahwa pada lokasi tersebut terdapat sumbu magnetik, yang sebelumnya diasumsikan berada di pusat lingkaran penampang poloidal tokamak.
Keyword: sumbu magnetik, Gelombang mikro