• Proceedings of the Ginseng society Conference
• /
• 1998.06a
• /
• pp.138-145
• /
• 1998

A validated and reproducible HPLC method was developed for the profiling and quantitative analysis of ginsenosides in commercial products available in North America. Analysis of 280 Panax ginseng and Panax quinquefolius products showed profiles indicative of the presence of ginsenosides in the majority of these products. However, the quantitative contents of the products vary greatly, not only in products of different formulations, but also of products within each of the fromulations examined.

• Journal of Fisheries and Marine Sciences Education
• /
• v.28 no.2
• /
• pp.489-501
• /
• 2016

The purpose of this research is to analyze the narratives of elementary school history textbooks of Korea and US. The research problems are as follows. Firstly, what are the form and content of narratives of Korea's elementary school history textbook of Korea and US. Secondly, what are the characteristics of narratives of American elementary school history textbook of Korea and US. The content analysis method was utilized for analyzing narratives of textbooks. Research results are summarized as follows. Firstly, the features of Korea's elementary school history textbook are described. Secondly, the features of American elementary school history textbook are described. Thirdly, the common features and differences between both countries' textbook narratives are analyzed. Lastly, the implications for diversifying the narratives of Korea's elementary school history textbook are recommended.

• English & American cultural studies
• /
• v.17 no.1
• /
• pp.81-106
• /
• 2017

Using recently emerging quantitative methods, this article provides a comparative study of the diachronic changes in the narrations of novel, history, and science from the early 18th-century to the 20th-century. To trace the narrative changes in different genres, this article discusses how text-mining methodology can be introduced in literary studies. We compared the traces of narrative in three genres—novel, history, and science—as a pilot study, with the three major grammatical elements of narrative: pronoun, subordinating conjunction, and action verbs in past tense. The results of data-mining show that the use of pronoun and action verb has increased in the genre of novel toward the $20^{th}$ century, while history and science has developed less story-like writing styles.

• Proceedings of the PSK Conference
• /
• 2003.10b
• /
• pp.157.2-157.2
• /
• 2003

Panax ginseng is one of the most important medicinal plant in the Orient. The international trade of ginseng is increasing yearly. The disguise of Chinese and American ginseng into Korean ginseng became a problem in recent years in Korea and an abroad. Obviously, an effective method of authentication of Korean ginseng from others at a DNA level, is necessary for the healthy development of the ginseng market. In order to develop convenient and reproducible methods for the identification of Korean ginseng, amplified fragment length polymorphism (AFLP) analysis was applied within Panax species (Korean cultivatied and wild ginseng, Chinese wild ginseng, American cultivatied and wild ginseng). (omitted)

• Journal of the Korean Mathematical Society
• /
• v.36 no.3
• /
• pp.609-619
• /
• 1999

We give a mathematically rigorous description of the recently popular latent semantic indexing (LSI) method in text information retrieval theory. Also, a related problem of finding a document ranking function in linear relevance feedback is discussed.

• Journal of Arbitration Studies
• /
• v.26 no.2
• /
• pp.91-114
• /
• 2016

The purpose of this study is to promote trade between Korea and South American countries. Korea's trade with South America has decreased recently. This study analyzed the effects of arbitration on trade between Korea and South America. To this end, we conducted an analysis of the gravity model of trade between Korea and South America. The gravity model is a research method that is widely used to analyze the pattern of international trade. The dependent variables of the gravity model were trade in Korea and South America. The independent variables were GDP, population, and distance between Korea and South America. In addition, dummy variables were the FTA and whether to join the New York Convention or Washington Convention. Joining either Convention indicated the establishment of an international arbitration system. As a result, an arbitration system appeared to be effective in increasing trade. Depending on the results it shows the importance of utilizing the system of arbitration in South America. So this study analyzed the current status of arbitration in South America. To companies doing business in South America it provided the implications for an arbitration system there. Also it proposed a method for increasing trade for the Korean government and institutions.

• Journal of Ecology and Environment
• /
• v.30 no.2
• /
• pp.195-199
• /
• 2007

Statistical tools for determining sex in the sexually monomorphic black-billed magpie based on morphological characters have been developed based on studies of European and North American populations. However, since no morphological method has been developed for black-billed magpies in Korea, it has been difficult to conduct field studies that require information about the sex of individuals. We present two discriminant equations for determining sex of second-year (SY) and after-second-year (ASY) magpies in north- and midwestern part of South Korea. Based on morphological measurements on 105 SY (56 females, 49 males) and 72 ASY (36 females, 36 males) individuals, we found body mass, wing chord, and head length to be the most useful features for morphological sex determination. The accuracy of our method was 86.5% for SYs and 93.1% for ASYs, which is similar to values reported previously from American and European magpies. Since the equations contain morphological traits which are only minimally susceptible to seasonal variation and measurement errors, our discriminant equations should be both useful and robust for sex determination on black-billed magpies in the northern and mid-western regions of South Korea.

• Korean Journal of Health Education and Promotion
• /
• v.23 no.5
• /
• pp.29-46
• /
• 2006

Purpose: Since 1994, Asian Health Services, the Korean American Community Advisory Board, and the Center for Family and Community Health (University of California at Berkeley) have conducted periodic, population-based surveys on Korean American community health in Alameda County, California. The present study examines changes in health care access and utilization between 1994 and 2002 among Korean American adults in Alameda County, California. Method: We reanalyzed data from the 1994 and 2002 Korean Health Surveys. The primary variables of interest, health care access and utilization, were operationalized in terms of health insurance coverage, routine check-ups, a usual source of health care and reported barriers to health care. The frequency distribution of each indicator was calculated and its standard error was estimated using SUDAAN. The differences between 1994 and 2002 were examined with chi-square test. Results: Compared to 1994, Korean Americans in Alameda County were more likely to have health insurance coverage in 2002 (74.0% vs. 82.7%). Korean Americans in Alameda County were more likely to have received a recent (prior two years) routine health checkup in 2002 (50.4% vs. 57.2%). Health checkups increased over time for males, for adults with more than 12 years of education, and for employed adults. Also, compared to 1994, employed adults were more likely to have a usual source of health care in 2002 (66.5% vs. 78.4%). In both 1994 and 2002, high cost (58.0% vs. 47.8%) was the most commonly cited barrier to health care, and the next most frequently cited barriers were language (29.2% vs. 27.7%) and no time (29.2% vs. 30.3%). Conclusion: To improve health care utilization and health conditions, it is important to investigate factors related to health care and to monitor changing trends. Ongoing surveillance of health-related factors can contribute to the development of health education programs to reduce morbidity and mortality due to chronic disease, and thereby lead to improvements in health status among Korean Americans.

• Korean Journal of Culture and Social Issue
• /
• v.16 no.3
• /
• pp.221-240
• /
• 2010

The purpose of this study is to examine the prevalence of depression in Korean American men and factors associated with the Korean American men's depression by examining how depression is affected by socio-demographic characteristics, immigration-related characteristics, and psychological and social characteristics. Socio-demographic characteristics include age, education, occupation, and monthly income. Immigration-related characteristics include years in the U. S., being U. S. citizens, and acculturation level. Psychological and social characteristics include anger, marital satisfaction, and social support. Using an availability sampling method, data were collected from 201 Korean American married men who were between the ages of 20 and 64 and resided in Los Angeles County. This study used a structured self-administered questionnaire. Due to the unreliable responses, five questionnaires were excluded from the study. Therefore 196 completed questionnaires were used for the data analyses. In order to measure the respondents' depression, the CES-D(Center for Epidemiological Studies of Depression) was used in this study. In the hierarchical multiple regression analyses, monthly income, anger, marital satisfaction, and social support were significantly associated with the respondents' depression. However, there were no significant associations between depression and age, education, occupation, being a U. S. citizen, and acculturation. Implications of the findings for mental health practitioners and social works are discussed.

• Journal of radiological science and technology
• /
• v.45 no.1
• /
• pp.11-17
• /
• 2022

This study was purpose to quantitative assessment of the resolution characteristics by using American college of radiology(ACR) phantom for magnetic resonance imaging (MRI). The MRI equipment was used (Achiva 3.0T MRI, Philips system, Netherlands) and the head/neck matrix shim SENSE head coil were 32 channels(elements) receive MR coil. And the MRI equipment was used (Discovery MR 750, 3.0T MRI, GE medical system, America) and the head/neck matrix shim MC 3003G-32R 32-CH head coil were receive MR coil. As for the modulation transfer function(MTF) comparison result by using ACR magnetic resonance imaging phantom, the MTF value of the ACR standard T2 image in GE equipment is 0.199 when the frequency is 1.0 mm^-1 and the MTF value of the hospital T2 image in Philips equipment is 0.528. It was used efficiently by using a general sequence more than the standard sequence method using the ACR phantom. In addition it is significant that the quantitative quality assurance evaluation method for resolution characteristics was applied mutatis mutandis, and the result values of the physical image characteristics of the 3.0T MRI device were presented.