Judul: Kualitas Visual dan Fungsional Turfgrass pada Beberapa Waktu Awal dan Frekuensi Aplikasi Pupuk Hayati
Abstrak: Inorganic fertilization with relatively high dosage and frequency is mostly done to maintain quality, density and uniformity of turfgrass. However this practice has caused soil and water pollution. Using biofertilizer was done to reduce the use of inorganic fertilizers. The objective of the research was to study the visual and functional quality of turfgrass on several first application times and frequencies of biofertilizer application. This research was done in Bukit Pelangi Golf Course, Cijayanti, Bogor from February 2012 until August 2012. The experiment was arranged at split plots in randomized block design with two factors, which are: first application times and frequencies of biofertilizer application, in four replications. First application times as the main plot consist of four levels, which are: 1, 2, 3, and 4 weeks before planting. Frequencies of biofertilizer application as the sub-plot consists of four levels, which are: once every 1, 2, 3, and 4 weeks. The results showed that application frequency at once a week showed the best visual and functional quality and not significantly different compared to the frequency of application at once every two weeks. First application time at three weeks before planting and the frequency of application at once every two weeks was the best treatment to enhance the visual and functional turfgrass quality, which increase shoot density, leaf width, leaf color, leaf length, biomass clipping, the percentage of couverage, root length, root biomass, increased the recovery, and decreased the diameter of stolon.
Keyword: visual, turfgrass, tifdwarft, quality, fungsional, frequencies, first application, Cynodon dactylon (L.), biofertilizer

Judul: Kualitas visual dan fungsional rumput golf Cynodon dactylon var Tifway yang diberi pupuk NPK pada media campuran pasir dan bentonit
Abstrak: Golf is one of preferable sports that people do to maintain health. Golf course quality depends on the grass quality. Using the efficient fertilizer and the right growing media are the way to maintain the golf course grass quality. Therefore, the objectives of this research was to learn the visual and functional qualities of golf course grass Cynodon dactylon var Tifway that added with NPK fertilizer and sand with bentonite mixture and to suppose recommendation of the most appropriate and efficient fertilizer and growing media mixture composition. The experiment was arranged in factorial Randomized Block Design. The treatments consisted of two factor, NPK rate at 2.5 g/m2, 5 g/m2, and 10 g/m2; sand media 100 %, sand 87.5 % with bentonite 12.5 %, and sand 75% with bentonite 25%. The result showed that combination of highest NPK fertilizer dosage and media mixing of sand and bentonite created the best effect to visual quality (grass color) and functional qualities (grass height, yields, density). Combination NPK fertilizer dosage at 10 g N/m2/application and sand 87.5 % with bentonite 12.5 % was the recommendation of this research
Keyword: Bogor Agricultural University (IPB), visual quality, sand, functional quality, bermuda grass, bentonite

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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