• Title/Summary/Keyword: official method

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New Method for Simultaneous Quantification of 12 Ginsenosides in Red Ginseng Powder and Extract: In-house Method Validation

  • In, Gyo;Ahn, Nam-Geun;Bae, Bong-Seok;Han, Sung-Tai;Noh, Kil-Bong;Kim, Cheon-Suk
    • Journal of Ginseng Research
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    • v.36 no.2
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    • pp.205-210
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    • 2012
  • For quality control of components in Korean red ginseng powder and extract, a new method for simultaneous quantification of 12 ginsenosides ($Rg_1$, Re, Rf, $Rh_1$, $Rg_2$[S], $Rg_2$[R], $Rb_1$, Rc, $Rb_2$, Rd, $Rg_3$[S], and $Rg_3$[R]) was studied. Compared to the official method for quantification of marker substances (ginsenosides $Rg_1$ and $Rb_1$), the proposed methods were guaranteed by in-house method validation. Several criteria such as linearity, specificity, precision and accuracy were evaluated. For red ginseng powder, recovery (averaging 95% to 105%) was calculated, and analysis of variance was carried out to estimate the relative standard deviation (0.20% to 2.12%). For red ginseng extract, the average recovery rate was 90% to 99% and the relative standard deviation was 0.39% to 2.40%. These results indicate that the proposed method could be used in the laboratory for determination of 12 ginsenosides in red ginseng powder and extract. In addition, this method was found to be suitable for quality control of ginseng products and potentially offer time and cost benefits.

Study on Regeneration and Utilization Method of Japanese Traditional Urban Housing : The Case Study of Kyo-Machiya (일본 전통 도시형주택의 재생 및 보전방안에 관한 연구 : 교마치야를 중심으로)

  • Kim, Do-Yeon;Oh, Hye-Kyung
    • Journal of Families and Better Life
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    • v.27 no.3
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    • pp.1-13
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    • 2009
  • The importance of the historical sites in cities has risen, and therefore this study was performed to find the methods to feasibly manage such sites. In line with the purpose, this study analytically reviews Japan's Kyo-machiya Restoration Policy, which has been systematically carried out under civil-official cooperation, and related policies. For reference, Kyo-machiya is the Kyoto-style wooden house. The results are derived as in the following. First of all, Kyo-machiya Restoration Policy was focused not only on traditional wooden houses but on residents and other buildings as well, and carried out under the cooperation among residents, the administrative office and enterprises. Kyoto citizens established their own ordinances that are suitable to each area so that historical sites may be managed in accordance with city planning. Also, the think tank actively participated in the establishment of municipal ordinances. Lastly, the policy was behind local residents and civic organizations so that they would continuously pay respect to historic sites in cities.

Multi-channel Two-Way Time Transfer Using a Communication Satellite (통신위성 이용 멀티채널 양방향 시각비교 연구)

  • Yang, Sung-Hoon;Lee, Chang-Bok;Lee, Jong-Koo;Lee, Young-Kyu;Lee, Sang-Jeong
    • Journal of Institute of Control, Robotics and Systems
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    • v.15 no.3
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    • pp.346-352
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    • 2009
  • UTC (Coordinated Universal Time) has been made by the comparison results and the statistical analysis of primary clocks maintained by national standard institutes. Some kinds of technique have been used for international time transfer; since 1980s the study on methods and development of time transfer has conducted with activation of GPS application. And the more accurate and easier method made it use the official time transfer method for the generation of UTC. But recently TWSTFT (Two-Way Satellite Time and Frequency Transfers) as well as GPS time transfer are increasing in number because the TWSTFT is able to improve the accuracy and precision of time comparison owing to the elimination of the ionospheric and tropospheric delay errors thanks to the reciprocal propagation path. In this paper, we introduce the TWSTFT results by a multi-channel modem comparing with GPS P3-code.

Demographic Trends and the Methods of their Regulation in the Republic of Kazakhstan

  • Nurlanova, Nailya K.;Meldakhanova, Marziya K.
    • The Journal of Asian Finance, Economics and Business
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    • v.2 no.3
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    • pp.23-32
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    • 2015
  • The aim of this work is to study the specifics of demographic processes in the Republic of Kazakhstan and to justify proposals concerning improvement of tendencies and methods of realizations of demographic policy in the country. The following methods have been used in this study: the principles of system approach; methods of statistical and comparative economic analysis, sociological analysis; method of expert evaluations; generalization and system analysis. Statistical method is based on the accountability of statistics office of the Ministry of National Economy of the Republic of Kazakhstan (RK) and on the results of sociological studies. The official statistic information, materials of the population census of the RK, materials of the Ministry of Health and Social Development of RK, data from author's studies, carried out in the Institute of Economy of science committee of Ministry of Education and Science of the Republic of Kazakhstan were used in this study. The conclusion about positive tendencies in demographic processes and about necessity of improvement of demographic policy was made. A number of proposals and recommendations concerning creation of favorable social and economic conditions for improvement of demographic situation, enhancement of institutional basis of demographic policy, forms and methods of its realization considering priorities of future development of Kazakhstan were justified.

Calculation of Free Nicotine by Determination of pH and Nicotine in Tobacco (담배 중 pH와 Nicotine 함량에 의한 Free nicotine 측정)

  • Lee Jeong-Min;Jang Gi-Chul;Hwang Keon-Joong;Kim Yong-Ha;Rhee Moon-Soo
    • Journal of the Korean Society of Tobacco Science
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    • v.27 no.2
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    • pp.219-225
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    • 2005
  • Characterizing nicotine delivery from tobacco products is important in the understanding of their addictive potential. Most previous studies report total nicotine and have not differentiated between nicotine in its protonated or free-base form. The amount of free nicotine calculated by determining pH and nicotine contents. The pH and nicotine contents in smokeless tobacco product, tobacco products and tobacco leaves were analyzed by Health Canada-Official Method T-310 and CORESTA Recommended Method $N^{\circ}62$. The content of free nicotine was calculated according to the Henderson-Hasselbalch equation and the value of $\alpha_{fb}$(the fraction of nicotine that is in the free base form) by using a pKa value of 8.02 for nicotine. The percentage of free nicotine then was calculated by dividing the free nicotine content by total nicotine content. The pH value and percentage of free nicotine ranged from 5.01 to 5.45 and $0.10\%\;to\;0.27\%$ in cut tobacco and 5.10 to 7.10 and $0.12\%\;to\;10.73\%$ in tobacco leaves, respectively.

Measures against Security Safety and Hallucinogenic Drug Crimes (환각성 약물범죄와 경호안전상의 대응방안)

  • Jeon, Kyung-Soo
    • Korean Security Journal
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    • no.2
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    • pp.211-226
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    • 1999
  • Troublesome problems are being caused by hallucinogenic drugs which come not only from illegal narcotics but also from unprohibited general drug-kinds such as cough-remedy agents of textromerupan, namely, Lamina, Rubi-king and the likes. Abuse and misuse of narcotics permeated into and threatens mental health of socially-known peoples, actor, actress, talents and businessmen as well. This study especially dealt with problems related with Mesampetamin, Rurajaepam, Texstrometropan and Karisofrodol which affects mental behaviour, and considered counter-measures through analysis and developed appropriate system of goods circulation for guidance to be complied by the medicine professionalists. The guidance sought here is recommended to the government ministries for further enforcement of crack-down of the drug crimes. Arquesa in method is recommend as a method of identifying behaviors and facial expressions of abusers and misusers of narcotics at the spot in place. This study is directed to curtailing hallucinogenic drugs use for absolute preventive security by detecting out black dealers of narcotics supplying to the abusers and misusers. There is a need of special education program to cut off the flow of narcotics or drugs crimes into official security force as well as private security personnel. This study introduced a priority and emphasis of real augmentation to theory and practice of the modern scientific security which can protect the mental health of the guarded persons as well especially in the light of security safety curriculum at the school.

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Factors Affecting the Behavioral Intention and Behavior of Using E-Wallets of Youth in Vietnam

  • PHAN, Trong Nhan;HO, Truc Vi;LE-HOANG, Phuong Viet
    • The Journal of Asian Finance, Economics and Business
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    • v.7 no.10
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    • pp.295-302
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    • 2020
  • The study examines an empirical case that explores the key constructs of the Unified Theory of Acceptance and Use of Technology (UTAUT) (Venkatesh, Morris, Davis & Davis, 2003) and the relationship between security and privacy of the Theory of Perceived Risk (TPR) (Bauer, 1960). This study employs survey data of 200 young Internet users aged 18 to 25. The study was conducted through two steps: preliminary research by qualitative research method to form the official research scale then formal research by quantitative research method using CFA and SEM to test the research model. The research results show that performance expectancy and social influence significantly predict behavioral intention to use e-wallets in payment. In contrast, the factors, namely, security and privacy, and effort expectancy, are statistically insignificant on behavioral intention. Nevertheless, the facilitating conditions factor still affects the behavior of using e-wallets. The study proposes a model to generalize the online payment environment through the integration of UTAUT and TPR models that are important for online payment management and researchers in the technology environment. The findings of this study suggest that social influence significantly affects the intention of young people to use e-wallets instead of security and privacy.

A Study on Intrusion Alert Redustion Method for IDS Management (침입탐지 시스템 관리를 위한 침입경보 축약기법 적용에 관한 연구)

  • Kim, Seok-Hun;Jeong, Jin-Young;Song, Jung-Gil
    • Convergence Security Journal
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    • v.5 no.4
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    • pp.1-6
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    • 2005
  • Today the malicious approach and information threat against a network system increase and, the demage about this spread to persnal user from company. The product which provides only unit security function like an infiltration detection system and an infiltration interception system reached the limits about the composition infiltration which is being turn out dispersion anger and intelligence anger Necessity of integrated security civil official is raising its head using various security product about infiltration detection, confrontation and reverse tracking of hacker. Because of the quantity to be many analysis of the event which is transmitted from the various security product and infiltration alarm, analysis is difficult. So server is becoming the charge of their side. Consequently the dissertation will research the method to axis infiltration alarm data to solve like this problem.

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Development of a Validated Determination of Methylsulfonylmethane in Dietary Supplement by Gas Chromatography (기체크로마토그래피를 이용한 식이보충제에서 메틸설포닐메탄의 검증된 분석법 개발)

  • Park, Sang-Wook;Lee, Wonjae
    • KSBB Journal
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    • v.30 no.4
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    • pp.141-147
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    • 2015
  • The convenient determination of methylsulfonylmethane (MSM) for a commercially available dietary supplement was developed using gas chromatography (GC)-flame ionization detector (FID). Chromatography was performed on a capillary column ($0.32mm\;I.D{\times}30m$, $0.25{\mu}m$) coated with dimethylpolysiloxane using diethylene glycol methyl ether as an internal standard. The performance characteristics of GC were evaluated in terms of selectivity, linearity, precision, accuracy, recovery, limit of detection (LOD) and limit of quantification (LOQ). The calibration curve was highly linear (the coefficient of determination: 0.9979) within the concentration range of $10.0{\sim}800.0{\mu}g/mL$ for MSM. The recoveries for three fortified concentrations were 96.7~97.1%, 96.6~97.3% and 96.8~97.2%, respectively. The LOD and LOQ of the method were $0.29{\mu}g/mL$ and $0.97{\mu}g/mL$, respectively. All obtained results were acceptable according to the guidelines of the Association of Official Analytical Chemists for dietary supplements. Thus, the validated analytical method using the GC-FID system is suitable for the determination of MSM in dietary supplement formulations for quality control.

Generating Korean synthetic populations by using the iterative proportional updating method (Iterative Proportional Updating 방법을 이용한 한국 가상 인구 데이터 생성)

  • Son, Woo-Sik;Kwon, Okyu;Lee, Sang-Hee
    • Journal of the Korea Society for Simulation
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    • v.25 no.4
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    • pp.13-20
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    • 2016
  • Microsimulation model has aimed to simulate the impact of policy at the level of individual and household. Recently, microsimulation model has been widely accepted in OECD countries for evaluating their economic and social policies. For improving the availability of microsimulation model, the population data which shows good accordance with the official statistics should be required. In this paper, we generate Korean synthetic populations by using the iterative proportional updating method. For the validation of Korean synthetic populations, we compute the difference between the generated synthetic populations and the summary table of Korean census. Then, we confirm that it shows good accordance with the summary table.