Judul: Blossoming Stimulation on Five Species of Bush Growing in Polluted
Abstrak: This research is aimed at finding out the influence of the growth-slowening- substance called paclobutrazol towards the blossoming stimulation of five species of bush planted on polluted street side. It is also aimed at finding out which species that is tollerant to the pollutant, so that in the future it can be recommended to be planted on the street side. The research is carried out both in the streets with heavy traffic and in a greenhouse (the controll subjects). The research design used for the present research is the Random Factorial Group design that consists of 2 treatmen and 3 times of repetitions. The results of the research-show that the content of NO₂ in the bush growing in the streets is 89.53 µg/m³ (0.0477 ppm), whereas the content of SO2 is 3.81 µg/m³ (0.0015 ppm). This is considered to be harmless for the generative growth of the bush because it is still below the standard limit. The content of Pb in Musaenda alba growing both in the streets and in the greenhouse is mostly about 0.059 (µg/cm²) and 0.012 (µg/cm³) respectively. The biggest deposit of Pb occurs on the streets with heavy traffic. The colour of blossoms and leaves of the bush growing in the streets and greenhouse does not show any significant difference. Lantana camara has a very good ability to grow in a polluted surrounding. This is proved by the evidence, in terms of the number of blossoms, that those growing in the streets have 15,2, whereas those growing in the greenhouse have 6,8. Meanwhile, the use of paclobutrazol towards the number of blossoms is 300 ppm. Mussaenda alba growing in the streets have the lowest APTI (Air Pollution Tolerance Index) value, namely 10.20, so that it is categorised as the bush that is very sensitive againts the air pollution caused by motor vehicle's emmision. However, in the greenhouse, it has APTI value of 15.48. Allamanda cathartica, Lantana camara, Ixora javanica growing in the streets have sufficient tollerance against the air pollution, whereas Jatropha gossypifolia is relatively tollerant against the air pollution. In the greenhouse, Allamanda cathartica and Ixora javanica have sufficient tollerance againts the air pollution, whereas Lantana camara, Mussaenda alba and Jatropha gossypifolia are relatively tollerant against the air pollution. The use of paclobutrazol towards the APTI values in the streets is lower than in the greenhouse.
Keyword: Heavy traffic, Green house, Pullution, Tolerance, greenhouse, pollution, tolerance

Judul: Respon pertumbuhan dan fisiologi tanaman Asystasia gangetica, Impatiens balsamina, dan Mirabilis jalapa pada tingkat polusi yang berbeda
Abstrak: Air pollution is an environmental issue that causes the changing and decreasing of air quality. The plants have different response to the aerial pollution. The purpose of this research was to analyze growth and physiological responses of Asystasia gangetica, Impatiens balsamina, and Mirabilis jalapa grown under different level of pollution in Bogor. The plants were grown in polybag and during 3 months they were exposed to different conditions: (1) with higher aerial pollution and (2) with lower aerial pollution. Growth responses observed in the experiment were the improvement of relative high, leaf number, leaf area, and the value of roots and shoot fresh weight, dry weight, and ratio of shoot/roots. Physiologycal responses observation was also analysed, including chlorophyll and ascorbic acid content. Different pollutant intentsity caused different in growth of Asystasia gangetica, Impatiens balsamina, and Mirabilis jalapa. The plants grown in higher pollution had lower chlorophyll and lower shoot/roots ratio as compared to those grown in lower pollution. Higher aerial pollution caused the plant underwent stress indicated by the increase of ascorbic acid content. The data showed that the plants were sensitive to the aerial pollution even though the pollutant content was still lower than below the standard threshold.
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Judul: Konstruksi aritmetika kurva eliptik F(2m) supersingular dan non-supersingular untuk skema kunci publik ElGamal
Abstrak: Algoritme ElGamal adalah salah satu algoritme kunci publik dengan aritmetik modular p yang mempunyai struktur grip siklik Z(p). Tingkat keanaman algoritme ini terletak pada pemecahan masalah logaritme diskret dari Z(p). Akan tetapi, tingkat keamanan tadi tahun ke tahun semakin menurun yang disebabkan kemampuan pemecahan algoritme diskret semakin meningkat. Untuk memenuhi tingkat keamanan yang memadai dibutuhkan p yang cukup besar yang menyebabkan proses enkripsi dan dekripsi menjadi lambat.
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