Judul: Karakter Vegetatif dan Fisiologi Gandum Introduksi Sensitif Suhu Tinggi di Dataran Sedang dan Tinggi
Abstrak: One of the effort to reduce our dependency to wheat import is by developing tropical wheat adapted to mid altitude. However, high temperature in this area can be a limiting factor for wheat growth and production. Application of putrescine to plants may alleviate the negative effect of high temperature stress. The objective of the research was to study the characters responses of introduction high temperature sensitive wheat to putrescine application grown at mid and high altitudes. The material plant used is introduction high temperature sensitive wheat Munal, S-03, and Dewata. The observed characters were plant height, number of tillers, flag leaf area, leaf thickness, flag leaf angle, stomatal density, relative transpiration rate, and cholorophyll content. The result showed that the genotypes affected almost all growth characters, while putrescine application only affected to stomatal density and relative transpiration rate of wheat grown in Cisarua with the best putrescine consentration of 1.25 mM. High temperature sensitive wheat grew better in high altitude (Cipanas) than that of in mid altitude (Cisarua). The genotype S-03 was more suitable to be grown in both altitudes.
Keyword: wheat, vegetative and physiological characters, putrescine, heat stress

Judul: Karakter Reproduktif Gandum (Triticum aestivum L.) Sensitif Suhu Tinggi pada Aplikasi Putresin di Dataran Sedang dan Tinggi
Abstrak: Wheat (Triticum aestivum L.) is originated from subtropic area. Cultivating wheat in Indonesia faces high temperature stress. Putrescine application may be used to overcome the problem. The objective of this research was to study the effect of putrescine and wheat genotype to the reproductive characters of wheat that were planted in medium (Cisarua) and high (Cipanas) altitudes. The experiment was a factorial experiment with two factors. The first factor was putrescine concentration with 3 levels i.e, 0.0, 1.25, and 2.5 mM. The second factor was three wheat genotypes consisted of Dewata, Munal, and S-03. Putrescine did not affect wheat growth and production. In Cipanas, wheat genotype also affected several reproductive characters, i.e: flowering age, the angle of inflorescence, harvesting time, length of panicle, number of spikelet, number of floret, number of empty floret, and weight of seed per panicle. In Cisarua, wheat genotype affected flowering age, the angle of inflorescence, harvesting time, length of panicle, number of spikelet, number of floret and number of empty floret per panicle. Genotype S-03 is the best genotype to be planted in Cipanas, whereas Dewata is the best genotype to be planted in Cisarua.
Keyword: Triticum aestivum L., sensitive temperature, putrescine, Character reproduktif

Judul: Pemodelan Harga Saham Menggunakan Model Lévy dan Model Black-Scholes
Abstrak: Stock may produce high profits. However, it has a high risk as well, because the stock prices fluctuate over time. Therefore, a model is required to estimate the future stock prices accurately. In this paper, Lévy model is compared to Black-Scholes model in estimating the stock price at Bank of America Corporation. As a result, it is concluded that the Black-Scholes model is more accurate than Lévy model.
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