Authors:Chang Lee, Mun Kang, Wanno Lee, Geun Choi, Young Cho, Hee Kim, and Kun Chung
210Po in the daily diet in Korea was analyzed and the ingestion dose from an intake of 210Po was estimated by considering the dietary habit of a Korean person. The 210Po concentrations of a leafy vegetable (0.36 Bq·kg−1 for lettuce) in the terrestrial food were higher than those of grain, whereas Chinese cabbage had a lesser 210Po concentration (0.019 Bq·kg−1). The 210Po concentration of the animal product was similar to those detected in the grain and vegetable. The 210Po concentrations in the shell and crustaceous were high from 19.1 to 33.0 Bq·kg−1, however, its value fell in the overall range of the reported values. The effective dose from 210Po for an adult from the Korean population was about 269.4 μSv·y−1. Nearly 80% of the ingestion dose from the intake of 210Po was attributed to the consumption of seafood. It suggests that the marine food ingestion is a critical pathway for natural
210Po to the Korean population.
Brief history and current status of activation analysis in Korea are described. About 120 papers have been published since the first paper was reported in 1960. They are sorted out into 5 consecutive periods according to the publication year, and typical feature of each period is described.
Authors:Yoon Yoon, Kil Lee, Kang Chung, Myong Yang, and Kun Kim
Instrumental neutron activation analysis (INAA), ICP/MS and XRF were applied for the characterization of relative locales of Korean old potteries, which had three different era and four regional characters. From the elemental analysis, two major elements such as Fe, Ti and some minor elements such as Cr, Sc, Zr were supposed to the main contributing factors for the regional classification. And the contents of rare earth elements, such as Eu and La were different in each pottery.
Helix relationships specifically for Korean domains by using a Korean search engine.
Previous studies of internet-mediated Triple Helix relationships have focused on the government's web space and the e-government use of the Web (Holmberg and
The Bohai state existed in the modern southern part of the Russian Far East (Primor’e region), North Korea and Northeastern China from the late 7th to the early 10th century. Bohai influenced many states and tribes that existed close to this state and played an important role in international relations between Silla, Japan and the Tang Empire. At the same time, Bohai was subjected to important cultural influences from other countries and in some cases followed their rituals and diplomatic traditions. Many specialists from Japan, Russia, China and the two Korean states have done research on various aspects of Bohai history and culture. However, most of these scholars failed to pay attention to Bohai’s influence on the role of ritual and the status of states in its international relations. Western specialists have also neglected the investigation of this field. Bohai and Silla (another Korean state in the southern part of the Korean Peninsula) had hostile relations over two hundred years because they could not agree on their respective status vis-à-vis each other. For example, Silla did not want to recognise Bohai as a sovereign and independent state, although Bohai was recognised as such by China, while Silla was a vassal of the Tang Empire. This article critically analyses the relations between Bohai and Silla and elucidates the origin of the conflict between the two countries using Russian and Korean publications.
For age determination, the single aliquot regenerative-dose (SAR) method was applied to quartz from archaeological materials, using luminescence stimulated by blue light. The quartz samples were extracted from sediment from the hydroponic farm related to rice cultivation in an area of archaeological interest in Buyeo, south of Seoul. The optically stimulated luminescence (OSL) dates obtained offered good agreement with the ages derived by typological assessment and 14C ages. These ages should contribute significantly to interpretation of the history of rice cultivation in Korea.
Authors:C. S. Park, G. M. Sun, S. H. Byun, and H. D. Choi
The new PGAA facility using diffracted neutron beam was developed in Korea. The basic characteristics of the facility were studied in detail. A general formalism of the k0 factor as extended to non-1/v absorber and arbitrary neutron spectrum was discussed and the actual data for Cd, Sm, Eu, Gd have been measured and determined successfully owing to the simple nature of the diffracted neutron spectrum. The k0 factors for B, N, Si, P, S and Cl were also determined and showed consistent results with previously reported ones. At an early stage, feasibility of boron concentration analysis and measurement of thermal neutron capture cross sections has been studied. The PGAA facility is now open to users. A considerable amount of beam time is already dedicated to studies on the elemental analysis.
By comparing the citation patterns of Korean researchers in physics and mechanical engineering, this study identifies the
extent to which type of publication source (Korean non-SCI, Korean SCI, and international SCI) and type of authorship (purely
Korean authors, Korean-foreign co-authors, and foreign-Korean co-authors) influence the choice of sources cited by Korean
scientists. Koreans publishing physics or mechanical engineering papers in international SCI journals are more likely to cite
articles published in journals of the science mainstream countries (the U.S., the U.K., the Netherlands, and Germany) than
articles published in national journals, while Koreans publishing in Korean journals tend to cite articles published in national
journals. In terms of authorship, articles published in mainstream journals are more highly cited by internationally co-authored
papers than Korean-authored papers in both disciplines.
A one day representative mixed diet of an adult Korean was collectedfrom the data based on the food intake of 108 healthy subjects between theages 20 and 50. Sampling for the Korean total diet was carried out by usinga market basket study based on the Korean standard food consumption schemereported by the Korean Nutrition Society. Average consumption frequency ofdifferent food items for a one day representative mixed diet of an adult Koreanand the amount of each item to prepare a one day Korean representative totaldiet are surveyed. The analytical methods involve both instrumental and radiochemicalneutron activation techniques developed for the determination of the elementsCs, I, Sr, Th and U in various kinds of food samples. Concentrations of traceelements including 5 important elements for radiological protection, U, Th,Cs, Sr and I in the Korean total diet and the 4 most frequently consumed Koreanfoodstuffs have been analyzed by neutron activation analysis. Detection limitsfor U, Th, Sr and I were improved to ppb levels by radiochemical separationafter neutron irradiation. Five biological NIST reference materials were alsoanalyzed for quality control of the analysis. Seventeen trace elements inthe Korean total diet and four Korean representative foodstuffs were alsoanalyzed quantitatively by instrumental neutron activation analysis.
Authors:Ronald Kostoff, Ryan Barth, and Clifford Lau
This study evaluates trends in quality of nanotechnology and nanoscience papers produced by South Korean authors. The metric
used to gauge quality is ratio of highly cited nanotechnology papers to total nanotechnology papers produced in sequential
time frames. In the first part of this paper, citations (and publications) for nanotechnology documents published by major
producing nations and major producing global institutions in four uneven time frames are examined. All nanotechnology documents
in the Science Citation Index [SCI, 2006] for 1998, 1999–2000, 2001–2002, 2003 were retrieved and analyzed in March 2007.
In the second part of this paper, all the nanotechnology documents produced by South Korean institutions were retrieved and
examined. All nanotechnology documents produced in South Korea (each document had at least one author with a South Korea address)
in each of the above time frames were retrieved and analyzed. The South Korean institutions were extracted, and their fraction
of total highly cited documents was compared to their fraction of total published documents. Non-Korean institutions that
co-authored papers were included as well, to offer some perspective on the value of collaboration.