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: Pengaturan Intensitas Larutan Hara terhadap Pertumbuhan Tanaman Akar Wangi (Vetiveria zizanioides L.) yang Dibudidayakan Secara Aeroponik
Abstrak: The experiment was conducted to study the growth respons of vetiver (Vetiveria zizanioides L) in aeroponic cultivation. Aeroponic application implemented in greenhouse of University Farm IPB Dramaga, Bogor in February- May 2013. Experiment was using Randomized Complete Block Design, 4 treatments 3 replications. The treatments were 1 minute nutrients application (On) 4 minutes pause (Off) 1 seed per planting hole, 1 minutes On 4 minutes Off 2 seeds per planting hole, 2 minute On 8 minutes Off 1 seed per planting hole, 2 minutes On 8 minutes Off 2 seeds per planting hole. The result showed that the treatment of 2 minutes On 8 minutes Off 1 seed per planting hole and the treatment of 2 minutes On 8 minutes Off 2 seeds per planting hole affect on vetiver root length. The treatment of 1 minute On 4 minutes Off 2 seeds per planting hole had a highest number of roots result. All treatments did not affect to plant height, chlorophyll content, and vetiver leafes greenness. Over all, aeroponic system resulted root growth better than fields.
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Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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