Judul: Kemampuan Penyerapan Timbal pada Pohon Kordia, Angsana dan Mahoni di Hutan Kota Jayakarta PT JIEP, Jakarta Timur.
Abstrak: PT JIEP is one of the three largest industrial Jakarta impaired environmental pollution, especially lead (Pb). Urban forest Jayakarta an urban forest in Pulogadung Industrial Area that is expected to reduce the impact of air pollution through the role of vegetation existing trees in the urban forest. Assessment of the ability of leaves to absorb lead in ambient air using the test method in three species (cordia, angsana, and mahogany) with atomic absorption spectrophotometer (AAS). The results obtained are the leaves that are on the lower canopy and facing the street have the biggest lead content value on each tree. Value absorption largest lead held by leaf cordia because the rough surface hairy leaves but the tree that has the largest value of lead absorption is due angsana tree has leaves that much.
Keyword: absorption of lead, canopy height, leaf morphology, the presence of sources of pollution

Judul: Analisis Biomassa dan Kandungan Karbon pada Jenis Serasah Daun Tanaman Hutan Kota di Arboretum Arsitektur Lanskap IPB, Bogor
Abstrak: Urban forest functioned as oxygen balancing (O2) and carbon dioxide (CO2), reduce pollutant, stored and emission carbon. This research aimed to measured biomass, carbon dioxide content, connection between biomass and binding carbon, and measured carbon dioxide absorption ability on manure type of city Forest plant on Arboretum Architecture Landscape IPB, Bogor. Method used in this research was destructive method during 7 weeks to 7 types of city plants were : trembesi (Samana saman), merbau (Intsia bijuga), dahu (Deacontomelon dao),ki putri (Podocarpus neriifolius), kayu manis (Cinnamonum zeylanicum), nangka (Artocarpus heterophylus), simpur (Dillenia indica). Trembesi (Samanea saman) and merbau (Intsia bijuga) was such type that has both highest binding biomass and carbon from seven type of city forest plants. Besides that leaf manure type from trembesi (Samanea saman) and merbau (Intsia bijuga) that have highest ability to absorb CO2 about 4.749 and 4.007 ton/ha/year. Urban forest development by plant both trembesi and timber tree types were as one alternative to reduce increasingly emission of carbon.
Keyword: urban forest., carbon content, biomass

Judul: Query Expansion based on Bilingual Dictionary Using Conditional Probability
Abstrak: Query expansion is a technique that can be used to bridge vocabulary gaps between queries and documents in the collection. With query expansion, user will be helped to formulate queries well so that user will optimize the search result. In this study, the expansion term was resulted from the translation of bilingual dictionary. Subsequently, several terms of expansion were elected based on the closeness of its relationship with the original query. This research showed that conditional probability can be used to select expansion term in bilingual translation method query expansion. The result of 1000 documents was more than 97% relevan document can be retrieved by this system. The more expansion term used, the larger number relevan document was retrieved.
Keyword: