Judul: Optimization of Technical Indicators Based on Genetic Algorithm in Stock Exchange.
Abstrak: Stock trading is become popular in Indonesia. The generation of profitable trading rules for stock exchange investments is a difficult but popular problem. The use of Machine Learning in this problem is to obtain objective results by using information in the past market behavior. In this research, genetic algorithm is used to automatically generate trading rules based on Technical Indicators. The method in this research used Hirabayashi (2009) model and also modification model of Hirabayashi by adding 2 additional technical indicators. The results shows that Hirabayashi Model and Modification Model generate better profit result compare with buy and hold strategy in small capitalization stock or big capitalization stocks in Indonesian Stock Exchange. By using Genetic Algorithm, some of the technical indicators could be ignored. It’s also found that modification model could adapt the price trend better than Hirabayashi Model.
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Judul: Optimasi alokasi portofolio saham pada pasar modal indonesia menggunakan algoritma genetik
Abstrak: The selection process of investment portfolio comprise of the selection of investment that have high returns and determine its weight allocation. Determinations of stock weight allocation of shares that consist of millions of possible combinations with manual calculations require a long time and high accuracy. Furthermore, it is needed a tools to facilitate the optimizing process for selection of stock portfolio in the Indonesian capital market in order to easier for investors to determine stock portfolio. The aim of this research was to (1) design the genetic algorithm (GA) model to optimize the allocation of stock portfolio in the Indonesian capital market, (2) develop a prototype system for stock portfolio optimization by using GA. The data used were based on data published by the Indonesia Stock Exchange from January 2004 until December 2009. In order to facilitate the selection of stocks that have good performance, it is needed to groups the stocks in the LQ45 index. In addition, the company's financial condition and its growth prospects were another factor in the selection process. Furthermore, the stock prices be used as research data were the closing price of each month. The design of GA to optimize the stock portfolio was done by determine the components of GA including encoding scheme, fitness function, parent selection, crossover, mutation, elitism and population replacement. Thus, validation testing of the model to analysis the model that has been developed. Beside that, it will be tested the weight changes of the stock allocation at certain periods, to assess the implementation of portfolio rebalancing. The results showed that GA can be used as a tool in the preparation of an optimal stock portfolio. Stock portfolio allocation using adaptive GA method to generate the highest total profit compared with the market index or same weight methods.
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Judul: Prevalensi Uretrostomi Perineum pada Kucing FLUTD di Papar, Sabah
Abstrak: Feline lower urinary tract disease (FLUTD) is a common disease that classified as an emergency case and need a quick treatment. This condition is usually effecting the urethra and bladder of the patients. This study aims to know the prevalence of perineal urethrostomy (PU) surgery in feline lower urinary tract disease (FLUTD) cats in SunRiz Animal Clinic, Papar, Sabah. Perineal urethrostomy (PU) is one of the surgical method that can be taken to treat urethral obstruction (UO) in cat. This surgery will remove the narrow part of the urethra and make a permanent urethral opening in the perineal region and help to decrease urethral obstruction (UO) in cats with complicated or recurrent obstructive feline lower urinary tract disease (FLUTD). This study was using 7 male cats and few reasons of doing PU were collected. 42.86% of the cats were going through a 3rd episode of FLUTD, while 71.43% of the cats were going through 2 catheterizations and having urinary tract infection (UTI) and kidney problem. The prevalence is depends on the blood and urine test results and the number of catheterization., Penyakit saluran kemih bawah pada kucing (FLUTD) adalah penyakit umum yang biasanya menyerang uretra dan kantong kemih dan membutuhkan perawatan segera. Penelitian ini bertujuan untuk mengetahui prevalensi operasi perineal urethrostomy (PU) pada kucing yang menderita FLUTD di Klinik Hewan SunRiz, Papar, Sabah. Uretrostomi perineum merupakan salah satu metode pembedahan yang dapat dilakukan untuk mengatasi obstruksi uretra pada kucing dengan cara mengangkat bagian sempit uretra dan membuat bukaan uretra permanen di daerah perineum. Penelitian ini menggunakan data sekunder yang diperoleh dari data operasi PU pada kasus FLUTD yang ditangani di Klinik Hewan SunRiz Papar, Sabah pada periode Juni 2020 sampai Februari 2021. Data dari 7 ekor kucing jantan dengan riwayat FLUTD dan obstruksi uretrostomi (UO) kambuhan yang diberikan operasi PU, digunakan. Data diperoleh dari rekam medis kesehatan pasien, tes hitung darah lengkap (CBC) dan tes urinalisis pasien. Semua data dianalisis secara deskriptif. 42,86% kucing mengalami FLUTD episode ketiga, yang mana telah mengalami kasus FLUTD kali ketiga. 71,43% kucing menjalani 2 kali kateterisasi dan mengalami infeksi saluran kemih (ISK) dan masalah ginjal. Prevalensinya tergantung dari hasil tes darah dan urin serta jumlah kateterisasi.
Keyword: FLUTD, perineal urethrostomy, urethral obstruction, recurrence, male cat