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We report the first InP HBT MMIC power amplifier chip results at K-band. A 21 GHz fully monolithic 2 mil InP HBT power MMIC which achieves 62.8% PAE with 10 dB gain and 20 dBm output power. A higher power MMIC at 18.5 GHz achieved 25 dBm output power with 40% PAE at 1 dB compression under class AB operation with no noticeable gain expansion. The MMIC has(More)
A high-performance liquid chromatographic method for the quantitation of nimesulide in human plasma is presented. The method is based on protein precipitation with methanol and reversed-phase chromatography with spectrophotometric detection at 404 nm. The separation was performed on a Nucleosil 120-5 C18, 50 x 4-mm I.D. column and the mobile phase consisted(More)
We present an interactive system for physical exercise of older people and provide results of a usability study with target user group. The system motivates an elderly person to do regular physical activity based on an easy exercise in a monitored environment without a direct supervision from care-givers. Our system employs multi-modal interface including(More)
We develop novel methods of incremental learning based on the bagging and boosting approaches to ensemble learning. Our method combines perceptron decision trees obtained with a margin maximizing algorithm into an ensemble in an incremental way. We demonstrate practical functionality of our algorithm on the task of ECG records classification. Our results(More)
A new method for the determination of ofloxacin in human plasma was developed. Plasma proteins were precipitated with acetonitrile, the supernatant concentrated and injected into a reversed-phase C18 column. Enoxacin was used as an internal standard. The fluorimetric detection was performed at 282 nm for excitation and 450 nm for emission. Limit of(More)
A high-performance liquid chromatographic method with fluorescence detection for the determination of itopride in human plasma is reported. The sample preparation was based on liquid-liquid extraction of itopride from plasma with t-butylmethylether and dichloromethane (70:30, v/v) mixture followed by a back extraction of the analyte to the phosphate buffer(More)
A high-performance liquid chromatographic (HPLC) method for the determination of valsartan in human plasma is reported. The assay is based on protein precipitation with methanol and reversed-phase chromatography with fluorimetric detection. The preparation of a batch of 24 samples takes 20 min. The liquid chromatography was performed on an octadecylsilica(More)
HMMs are the dominating technique used in speech recognition today since they perform well in overall phone recognition. In this paper, we show the comparison of HMM methods and machine learning techniques, such as neural networks, decision trees and ensemble classifiers with boosting and bagging in the task of articulatory-acoustic feature classification.(More)
A rapid high-performance liquid chromatographic method for the quantitation of citalopram in human plasma is presented. The sample preparation involved liquid-liquid extraction of citalopram with hexane-isoamyl alcohol (98:2 v/v) and back-extraction of the drug to 0.02 M hydrochloric acid. Liquid chromatography was performed on a cyano column (45 x 4.6 mm,(More)