Judul: Signature Identification Using Probabilistic Neural Networks (PNN) With Wavelet Transformation Praprocessing.
Abstrak: Signature identification is a process for identifying a person who has the signature. Nowadays, there are many signature forgeries. A system that can recognize signature patterns is required to overcome these problems. Identification system which is implemented in this research uses Probabilistic Neural Networks (PNN). It works faster than other neural network approaches such as backpropagation because PNN approach only needs one iteration in training process. This research uses 200 images of signatures which consist of 20 signatures of each 10 respondents. This research is divided into two parts which are images without Wavelet decomposition and iamges with Wavelet decomposition. The results of this research are the system using Wavelet decomposition level 2 and level 3 in 4-fold cross validation has 98% accuracy. Different training data causes different test results. The greater the number of training data tends to increase the accuracy. Computation time is faster with the Wavelet decomposition and even faster with the addition of decomposition level. Keyword : Probabilistic Neural Networks (PNN), signature, Wavelet.
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Judul: Signature Recognition using VFI5 Algorithm and Wavelet Preprocess.
Abstrak: Biometric is a science in recognizing the identity of a person based on their physical or behavioral traits. Today, one of the most widely applied biometric object is hand-written signature. In this research, we tried to identify offline handwritten signature using VFI5 (Voting Feature Intervals 5) classification algorithm. The VFI5 classification algorithm has been used previously on non-image objects with promising result. The feature used in the classification is the grayscale value of the image and the signature image dimension used in this research is 40×60 pixels which means originally there are 2400 features that relatively large to compute. Thus, Haar wavelet transform is used to reduce the dimension. This is done by taking only the approximation image of the transformation result, and leave the horizontal, vertical, diagonal details. The wavelet decomposition is applied until the fifth level, creating new low level images with 20×30, 10×15, 5×8, 3×4, 2×2 dimension respectively for the first, second, third, fourth, and fifth decomposition levels. The approximation images then classified using VFI5 algorithm, with 97.5%, 95%, 90%, 65%, and 62.5% accuracy respectively for the first, second, third, fourth, and fifth decomposition levels. It turned out that VFI5 algorithm can be used to identify images with wavelet transform to reduce the image dimension with good result, and the higher decomposition level applied, the more accuracy dropped. Keywords: signature identification, wavelet image dimension reduction, image classification, VFI5 algorithm.
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Judul: Definisi zat besi ( Fe ) pada anak babi
Abstrak: Dalam bidang sub sektor peternakan, ternak babi mempunyai prospek yang cukup baik untuk dikembangkan dalam rangka meningkatkan eksport non migas. Namun anak-anak babi yang sedang menyusu sering mengalami defisiensi zat besi (Fe). Bila masalah ini tidak segera ditanggulangi, peternak akan mengalami kerugian. Zat besi dapat diperoleh dari makanan yang berasal dari hewan (tepung tulang, tepung ikan, tepung daging, "skimmed milk"); tumbuh-tumbuhan (leguminosae, rumput-rumputan, biji-bijian) dan mineral alam (Girindra, 1979). Dalam tubuh hewan, zat besi berperanan sebagai pembawa 02 ke seluruh jaringan, juga sebagai pembawa oksigen pernafasan di dalam sel urat daging (Underwood, 1981). Dalam duodenum dan yeyenum bagian atas, besi dalam bentuk ferro akan diserap. Penyerapan ini akan diatur berdasarkan teori "mucosal block" dari Granick. Kemudian dalam plasma darah, besi akan berikatan dengan B₁ globulin dan membentuk transferrin, yang akan segera dibawa ke seluruh jaringan. Kelebihan besi akan diikat oleh apoferritin dan membentuk ferritin yang ditimbun sebagai besi cadangan, terutama di hati. Bila kapasitas besi yang dapat disimpan sebagai ferritin telah jenuh, maka besi akan ditimbun sebagai hemosiderin. Zat besi dalam jumlah yang sedikit akan diekskresikan melalui pengelupas- an epitil, tinja, air kemih, cairan empedu, keringat. ...
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