Judul: Pertumbuhan dan produksi tanaman akar wangi (Vetiveria zizanioides L. Nash) secara hidroponik pada beberapa komposisi media tanam
Abstrak: This research aimed to determine the effects of the growing media composition on the growth and production of vetiver (Vetiveria zizanioides L. Nash) in a hydroponic system. The research was started from December 2013 to February 2014 and conducted in a greenhouse of the Cikabayan Bawah with elevation of 240 meters above sea level. The research implemented the randomized block design (RBD) with 2 experiments: (1) uncutted root plants, (2) cutted root plants. A single factor used in the research is the growing media composition (v/v) that consists of 3 levels: 100% charcoal husk, charcoal husk:styrofoam (2:1), and charcoal husk:styrofoam (1:1). The results showed that the growing media composition significantly affected the height plants, fresh and dry matter weight of the uncutted root plants, the roots length of the cutted root plants. These research showed that the vetiver growing in the mixed materials (charcoal husk:styrofoam) has a better growth than the one growing in the single materials.
Keyword: Bogor Agricultural University (IPB), styrofoam, media compositions, charcoal husk

Judul: Pemberian Larutan Hara untuk Budidaya Tanaman Akar Wangi (Vetiveria zizanioides (L.) Nash) Menggunakan Teknologi Hidroponik Sistem Terapung (THST)
Abstrak: The objective of this experiment was to determine the effect of concentration of nutrient solution on growth and yield of vetiver (Vetiveria zizanioides (L.) Nash) Verina 2 variety using Hydroponic Floating System Technology (HFST). This experiment that is a continuation of previous experiment. The experiment is based on a randomized complete block desing which consists of two experiments: (1) a plant that has not been done cutting the roots (3 replicates), (2) plants that have been done cutting the roots (6 replicates), with one factor and three-level: nutrient solution concentration of 200 ppm, nutrient solution concentration of 400 ppm and nutrient solution concentration of 800 ppm. The results showed that the concentration of the nutrient solution had significant effect on plant height, number of tillers, number of new saplings, canopy dry weight in plants that have not done cutting the roots, and root fresh weight in plants that have been done cutting the roots. Treatment of nutrient solution concentration of 200 ppm resulted that the growth of plants do not develop properly. Vetiver plants that grown with the provision of nutrient solution concentration between 400 ppm to 800 ppm acquire a better canopy growth and root development of plants, therefore THST can be applied to the cultivation of vetiver on the concentration of the nutrient solution so it could produce a better canopy growth and root development.
Keyword: Bogor Agricultural University (IPB), vetiver, nutrient solution, hydroponic, floating system

Judul: Konstruksi Hukum Grup Kurva Eliptik Atas F3m
Abstrak: Elliptic curves upon F3m can be divided in two cases, i.e. supersingular and nonsupersingular case. Based on group laws on elliptic curves, a new arithmetic upon F3m can be formulated as an addition process of two random points on the curve. This addition process can then be applied to the ElGamal algorithm.
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