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: Efisiensi Hara pada Rumput Golf dengan Pemberian Pupuk Hayati
Abstrak: objective of the research was to study the effect of using biofertilizer on nutrient efficiency of turf grass. The research was conducted at the Rainbow Hills Golf Course, Cijayanti, Bogor on February to May 2012. The experiment was designed at randomized complete block design with two factors and three replications. The first factor is inorganic fertilizer with four dosages (A1:100%; A2:75%; A3:50%; and A4:0% of inorganic fertilizer recommended dosage (DA)) as main plot and the second factor is biofertilizer with four dosages (H1:100%; H2:75%; H3:50%; and H4:0% of biofertilizer recommended dosage (DH)) as sub plot. The results showed that biofertilizer aplication increased coverage area, density, crown dry weight, shoot-root ratio, clipping dry weight, nutrient efficiency (uptake and use), and reduced inorganic fertilizer
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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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