• Title/Summary/Keyword: Parameter extract

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Effect of Cynanchi wilfordii Radix Extract on the Acute Toxicity in Mice and Subacute Toxicity in Rats (백수오(白首烏) 엑스의 마우스 급성독성(急性毒性) 및 흰쥐 아급성독성(亞急性毒性)에 미치는 영향(影響))

  • Chung, Eun-Jin;Lee, Byung-Joo;Chung, Myung- Hyun
    • Korean Journal of Pharmacognosy
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    • v.24 no.2
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    • pp.166-176
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    • 1993
  • This study was attempted to investigate the acute toxicity in mice, the subacute toxicity in rats of Cynanchi wilfordii Radix extract, the effect on transaminase activities, hematological parameters, leukocyte parameters in serum of subacute-toxicated rats. In acute toxicity test, the death rate was not observed in 50, 100, 200, 300 mg/kg(i.p.), one tenths to two tenths in 300, 500, 1000, 1500 mg/kg(p.o.) for two weeks. In subacute test, rats were all died in 300 mg/kg(p.o.) during 4 weeks, in 500, 1000 mg/kg(p.o.) during three weeks. The cause of death believed to be stomach ulcer. The activities of S-GOT and S-GPT were significantly increased in all sample-treated groups, when compared with the normal groups. A number of WBC and neutrophil belong to hematological parameter were significantly increased, lymphocyte was decreased in all sample-treated group, when compared with normal group. The hemolytic action on water extract, saponin and alcohol extract showed very low activities.

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Acanthopanax senticosus Extract Prepared from Cultured Cells Improves Lipid Parameters in Rats Fed with a High Fat Diet

  • Cha, Youn-Soo;Soh, Ju-Ryoun;Kim, Jae-Whune
    • Preventive Nutrition and Food Science
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    • v.8 no.1
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    • pp.40-45
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    • 2003
  • Acanthopanax senticosus was grown by a novel, proprietary method, of culturing isolated cells in a bioreactor. An extract from the cells was evaluated for its effect on lipid metabolism in rats fed a high fat diet. Male Sprague-Dawley rats (n=6) were fed either an AIN-76 diet (control, NDCon), control diet plus Acanthopanax senticosus extract (ND+Ex), a modified AIN-76 diet supplemented with 20% beef tallow (high fat, HFCon), or a high fat diet plus Acanthopanax senticosus extract (HF+Ex), for 5weeks. Body weight gain was significantly higher in the HFCon group than the NDCon group. Feed consumption was significantly lower, but energy intake higher, in the groups fed high fat diets compared with the groups fed control diets. Serum HDL-cholesterol concentrations were significantly increased but serum LDL-cholesterol concentrations were decreased in the groups fed the Acanthopanax senticosus extract. Abdominal fat accumulation and serum leptin levels were significantly higher in the HFCon group than the other groups. Carnitine palmitoyltransferase-I (CPT-I) mRNA levels were increased in the groups fed Acanthopanx senticosus extract. These results suggest that supplementation of cell cultured Acanthopanax senticosus extract regulates CPT-I mRNA levels in liver and has an effect on the normalization of lipids in rats fed a high fat diet.

Korean isolated word recognizer using new time alignment method of speech signal (새로운 시간축 정규화 방법을 이용한 한국어 고립단어 인식기)

  • Nam, Myeong-U;Park, Gyu-Hong;No, Seung-Yong
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.38 no.5
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    • pp.567-575
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    • 2001
  • This paper suggests new method to get fixed size parameter from different length of voice signals. The efficiency of speech recognizer is determined by how to compare the similarity(distance of each pattern) of the parameter from voice signal. But the variation of voice signal and the difference of speech speed make it difficult to extract the fixed size parameter from the voice signal. The method suggested in this paper is to normalize the parameter at fixed size by using the 2 dimension DCT(Discrete Cosine Transform) after representing the parameter by spectrogram. To prove validity of the suggested method, parameter extracted from 32 auditory filter-bank(it estimates auditory nerve firing probabilities) is used for the input of neural network after being processed by 2 dimension DCT. And to compare with conventional methods, we used one of conventional methods which solve time alignment problem. The result shows more efficient performance and faster recognition speed in the speaker dependent and independent isolated word recognition than conventional method.

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Classification of Seabed Physiognomy Based on Side Scan Sonar Images

  • Sun, Ning;Shim, Tae-Bo
    • The Journal of the Acoustical Society of Korea
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    • v.26 no.3E
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    • pp.104-110
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    • 2007
  • As the exploration of the seabed is extended ever further, automated recognition and classification of sonar images become increasingly important. However, most of the methods ignore the directional information and its effect on the image textures produced. To deal with this problem, we apply 2D Gabor filters to extract the features of sonar images. The filters are designed with constrained parameters to reduce the complexity and to improve the calculation efficiency. Meanwhile, at each orientation, the optimal Gabor filter parameters will be selected with the help of bandwidth parameters based on the Fisher criterion. This method can overcome some disadvantages of the traditional approaches of extracting texture features, and improve the recognition rate effectively.

Realization of Digital Music Synthesizer Using a Frequency Modulation (FM 방식을 이용한 디지탈 악기음 합성기의 구현)

  • 주세철;김진범;김기두
    • Journal of the Korean Institute of Telematics and Electronics B
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    • v.32B no.7
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    • pp.1025-1035
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    • 1995
  • In this paper, we realize a real time digital FM synthesizer based on genetic algorithm using a general purpose digital signal processor. Especially, we synthesize diverse music sounds nicely using a synthesis model consisting of a single modulator and multiple carriers. Also we present genetic algorithm-based technique which determines optimal parameters for reconstruction through FM synthesis of a sound after analyzing the spectrum of PCM data as a standard music sound using FFT. Using the suggested parameter extractiuon algorithm, we extract parameters of several instruments and then synthesize digital FM sounds. To verify the validity of the parameter extraction algorithm as well as realization of a real time digital music synthesizer, the evaluation is first done by listening the sound directly as subjective test. Secondly, to evaluate the synthesized sound objectively with an engineering sense, we compare the synthesized sound with an original one in a time domain and a frequency domain.

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Accurate RF C-V Method to Extract Effective Channel Length and Parasitic Capacitance of Deep-Submicron LDD MOSFETs

  • Lee, Sangjun;Lee, Seonghearn
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.15 no.6
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    • pp.653-657
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    • 2015
  • A new paired gate-source voltage RF capacitance-voltage (C-V) method of extracting the effective channel length and parasitic capacitance using the intersection between two closely spaced linear regression lines of the gate capacitance versus gate length measured from S-parameters is proposed to remove errors from conventional C-V methods. Physically verified results are obtained at the gate-source voltage range where the slope of the gate capacitance versus gate-source voltage is maximized in the inversion region. The accuracy of this method is demonstrated by finding extracted value corresponding to the metallurgical channel length.

EXARCTION OF INDIVIDUAL TREE CHARACTERISTIC BY USING AIRBORNE LIDAR DATA

  • Hong, Sung-Hoo;Lee, Seung-Ho;Cho, Hyun-Kook;Nguyen, Dinh-Tai;Kim, Choen
    • Proceedings of the KSRS Conference
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    • 2007.10a
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    • pp.642-645
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    • 2007
  • Mounted in aircraft, LiDAR (Light Detection And Ranging) technology uses pulses of light to collect data about the terrain below. The main objective of this study was to extract reliable the individual tree and analysis techniques to facilitate the used LiDAR data for estimating tree crown diameter by measuring individual trees identifiable on the three dimensional LiDAR surface. In addition, this study can be quantitative analysis of individual tree through the canopy parameter.

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Optimization of Ferromagnetic Resonance Spectra Measuring Procedure for Accurate Gilbert Damping Parameter in Magnetic Thin Films Using a Vector Network Analyzer

  • Kim, D.H.;Kim, H.H.;You, Chun-Yeol;Kim, Hyung-Suk
    • Journal of Magnetics
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    • v.16 no.3
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    • pp.206-210
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    • 2011
  • We optimize a vector network analyzer ferromagnetic resonance (VNA-FMR) measurement system to study spin dynamics and Gilbert damping parameters of thin ferromagnetic films. In order to obtain accurate damping parameters, careful determination of the susceptibility line-width is required. The measured S-parameters are converted into the corresponding susceptibility through a calibration processes. From the line-width measurements, we can successfully extract the saturation magnetizations and Gilbert damping parameters of 5-, 8-, and 10-nm thick $Ni_{81}Fe_{19}$ (Py) films.

Parameter extraction using the ASE spectrum Modelling for various DFB-type LDs (여러 가지 형태의 DFB 유형 레이저의 ASE 스펙트럼 모델링과 파라메터 추출)

  • Chae Gyoo-Soo;Kim Min-Nyun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.7 no.1
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    • pp.46-51
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    • 2006
  • We present simulation results for a method designed to extract key parameter values of DFB-type LDs based on ASE spectrum measurements. Comparisons were made between the given (actual) and the extracted (estimated) parameters, as well as the associated spectra, fur a variety of DFB-type LDs, and the two sets of results were found to be in excellent agreement.

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Morphological Feature Parameter Extraction from the Chromosome Image Using Reconstruction Algorithm (염색체 영상의 재구성에 의한 형태학적 특징 파라메타 추출)

  • 장용훈;이권순
    • Journal of Biomedical Engineering Research
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    • v.17 no.4
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    • pp.545-552
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    • 1996
  • Researches on chromosome are very significant in cytogenetics since a gene of the chromosome controls revelation of the inheritance plasma The human chromosome analysis is widely used to diagnose genetic disease and various congenital anomalies. Many researches on automated chromosome karyotype analysis has been carried out, some of which produced commercial systems. However, there still remains much room for improving the accuracy of chromosome classification. In this paper, we propose an algorithm for reconstruction of the chromosDme image to improve the chromosome classification accuracy. Morphological feature parameters are extracted from the reconstructed chromosome images. The reconstruction method from chromosome image is the 32 direction line algorithm. We extract three morphological feature parameters, centromeric index(C.I.), relative length ratio(R.L.), and relative area ratio(R.A.), by preprocessing ten human chromosDme images. The experimental results show that proposed algorithm is better than that of other researchers'comparing by feature parameter errors.

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