Judul: Kemampuan Tanaman Hias dalam Menjerap Debu yang Dihasilkan oleh Kendaraan Bermotor (Studi Kasus: Bumi Serpong Damai)
Abstrak: There are many researches about plants based by their ability of sensitivity and tollerance for pollutant. This research measured kind of plants that planted in Bumi Serpong Damai, South Tangerang for adsorbing dust caused by vehicles. The location divided based on traffic level: high, medium and low. This research used 2 methods, measuring ever 4 hours and every 24 hours. The measurement every 4 hours at high traffic location stated that Heliconia adsorb dust highest, it is 53.73 mg/hour. At medium traffic location, Kaca Piring adsorb dust highest, it is 40.19 mg/hari. At low location Pandan Kuning adsorb dust highest, it is 26.82 mg/hour.The measurement every 24 hours at high traffic location stated that Heliconia adsorb dust highest, it is 59.53 mg/day.The measurement every 4 hours is better than measurement every 24 hours. This method affected by double tape saturation andadhesive decreasecaused the data become error. At medium traffic location, Kaca Piring adsorb dust highest, it is 47.95 mg/day. At low location Rowelia Tegak adsorb dust highest, it is 39.75 mg/dayHeliconia, Rowelia Tegak, Kaca Piring and Pandan Kuning are kind of plants that could adsorb dust well. Plant choosing based the leave surface could help adsrobing the dust more effective. Besides, combining the plants will be more effective for adsorbing dust.
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Judul: Studi kemampuan tanaman dalam menyerap dan menjerap timbal emisi dari kendaraan bermotor
Abstrak: Tujuan penelitian ini adalah untuk menge- tahui kemampuan daun tanaman dalam menjerap sorpsi) (ad- dan menyerap (absorpsi) timbal-udara ha- sil emisi dari kendaraan bermotor./ Dengan de- mikian, akan diperoleh daftar penggolongan kemam- puan tanaman berdasarkan kejerapan dan daun terhadap timbal-udara. keserapan Penelitian dilakukan dari bulan Juli sampai dengan Desember 1988. pat lokasi yakni: Percobaan dilakukan di em- (1) Jalan Sudirman sion bis Baranang Siang dan (4). Bogor. Sindang Barang. (3). (2) Sta- Jalan tol Jagorawi Semuanya terletak di Tanaman yang berumur sekitar 10 12 terdiri dari: pala bulan (Myristica fragrans), Кири-кири (Bau- Kesumba yang Jamuju (Podocarpus imbricatus). hinia purpurea). (Bixa orellana), dan damar (Agathis alba), mahoni (Swietenia macrophylla) kirai payung (Filicium decipiens) ditanam di ke empat lokasi tersebut di atas
Keyword: Absorption, Sorption

Judul: The Exploration of Discrete Logarithm over Finite Field GF(3m)
Abstrak: The security of many public~key algorithms is based on the problem of finding discrete logarithms. The generalized discrete logarithm problem is the following: given a finite cyclic group G of order n, a generator a of G, and an element fl E G, find the integer x, 0 ~ x ~ n - 1, such that 0: = fl. Algorithm for discrete logarithm problem focused on Menezes et al. (1997) that consist of exhaustive search algorithm, the baby-step giant-step algorithm, Pollard's rho algorithm, Pohlig-Hellman algorithm, and index-calculus algorithm. These algorithms are explorated to be used in discrete logarithm problem over finite field GF(3m ). The exploration also produces some algorithms, i.e. naif negative algorithm, baby-step mother-step algorithm, baby-step mother free-step algorithm, and baby-step free-step algorithm. All algorithms implemented using Maple 11. The Pohlig-Hellman and baby-step giant-step algorithms are efficient enough to be used in discrete logarithm problem over finite field GF(3m ) for m < 20.
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