Judul: Sumber Hara sebagai Pengganti AB mix pada Budidaya Sayuran Daun Secara Hidroponik
Abstrak: Increasing in fertilizer price causing increasing in hydroponic system cost. The objective of the research is to find the best fertilizer that can replace AB mix by examining several sources of nutrients, such as NPK 15:15:15 and NPK 12:14:12by equalizing element N for hydroponic cultivation spinach (Amaranthus L.), pakchoy (Brassica rapa cv. pakchoy) and lettuce (Lactuca sativa L.) in hydroponic. The research was conducted in the Green House, Dramaga Field Unit, University Farm, IPB Dramaga Bogor from February to April 2013. The treatments (AB mix, NPK 15:15:15, NPK 12:14:12) were arranged in randomized completely blok design with 4 replications. Each commodities is separate experiments with 3 treatmens. The results showed that fertilizer treatments gave the highest yield in spinach plants, pakchoy and lettuce in the components yields an average weight/plant, total weight and weight of marketable yield, respectively at 21.65 g, 259.75 g, 235.75 g spinach, 46.06 g, 552.75 g, 465.75 g pakchoy and 25.93 g, 311.15 g lettuce. Based on these results NPK15:15:15 and NPK12:14:12 fertilizer can not replace AB mix as a source of plant nutrients in spinach, pakchoy and hydroponic lettuce.
Keyword: NPK 12:14:12, NPK 15:15:15, leafy vegetables, hydroponic, AB mix

Judul: Sumber dan Frekuensi Aplikasi Larutan Hara sebagai Pengganti AB Mix pada Budidaya Sayuran Daun secara Hidroponik
Abstrak: The objective of this research to determinate the frequency and source of nutrient applications on growth and yield of kangkong (Ipomoea sp.), caisin (Brassica juncea), and kale (Brassica oleraceae Var Acephala) in hydroponics. The experiment were arranged in a RCBD (Randomized Completely Block Design) with two factors, first factor source of nutrient (AB Mix, NPK 15:15:15, and NPK 12:14:12), and second factor is method of application (one time and two time) with four replication so there are 24 experimental units. The result show NPK 15:15:15 have similar effect with AB Mix in kangkong, caisin, and kale.With one time frequency application, the best fertilizer source is NPK 15:15:15, while with two time application the best fertilizer is AB Mix.
Keyword: nutrient solution., NPK 12:14:12, NPK 15:15:15

Judul: Klasifikasi Sidik Jari Menggunakan Support Vector Machine Dengan Feature Berbasis Minutiae Menggunakan Metode Region
Abstrak: Manual fingerprint classification proceeds by carefully inspecting the geometric characteristics of major ridge curves in a fingerprint image. This research proposed an automatic approach of identifying the geometric characteristics of ridges based on minutiae position and angle. Position and angle of minutiae are analyzed using region method. Region was used to discretize the number of minutiae. Positions of minutiae in a region give information about its relation to another region. Angles of minutiae indicate the ridge flow direction. Support vector machine, a binary classifier, is used to classify the fingerprint based on those characteristics. In this research, the classes are left loop, right loop, whorl, arch and tented arch. This research used 2695 fingerprint images from NIST. Classification performance is measured using 3-fold cross validation method. This research achieved 79.7 % accuracy. As we only used local features in this research, further research needs to be conducted especially to investigate global features.
Keyword: