• Journal of Korean Society of Industrial and Systems Engineering
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• v.33 no.3
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• pp.55-62
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• 2010

Currently, cost estimation is very important to the government acquisition programs to support decisions about funding and to evaluate resource requirement as key decision points. Parametric cost estimating models have been used extensively to obtain appropriate cost estimates in early acquisition phase. However, they have many restrictions to ensure the cost estimating result in Korean defense environment because they are developed in the U.S.A. environment. In order to obtain a good R&D cost estimate, developing our own CERs (Cost Estimation Relationships) using historical R&D data is essential. Nevertheless, there has been little research to develop our own CERs. In this research, we established a CER development process and found some cost drivers in the historical movement weapon system R&D data. The R&D CER is developed using the PCR(Principle Component Regression) method to remove multicollinearity among data and to overcome the restriction of the insufficient number of sample. At least, this research is meaningful as a first attempt in terms of defining the CER development process and obtaining our own R&D CER based on the historical data in Korean weapon system R&D environment.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.06a
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• pp.88-88
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• 2007

Chemical mechanical polishing (CMP) 공정은 그 어원에서 알 수 있듯이 슬러리의 화학적인 요소와 웨이퍼에 가해지는 기계적 압력에 의해 결정되는 평탄화 기술이다. 최근, 금속배선공정에서 높은 전도율과 재료의 값이 싸다는 이유로 Cu률 사용하였으나, 디바이스의 구조적 특성을 유지하기 위해 높은 압력으로 인한 새로운 다공성 막(low-k)의 파괴와, 디싱과 에로젼 현상으로 인한 문제점이 발생하게 되었다. 이러한 문제점을 해결하고자, 본 논문에서는 Cu 표면에 Passivation layer를 형성 및 제거하는 개념으로 공정시 연마제를 사용하지 않으며, 낮은 압력조건에서 공정을 수행하기 위해, 전해질의 농도 변화에 따른 선형추의전압전류법과 순환전압전류법을 사용하여 전압활성화에 의한 전기화학적 반응이 어떤 영향을 미치는지 연구하였다.

• Journal of the Korean Society of Food Culture
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• v.34 no.2
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• pp.112-128
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• 2019

The history of modern Korean 'kimchi' can be traced through the history of the wordforms 'dihi' (디히), 'dimchʌi' (딤?), and 'thimchʌi' (팀?) in ancient Korean texts. As native Korean words, the 'dihi' word line ('dihi', 'dii', 'jihi', and 'ji') constitutes an old substratum. This word line coexisted with the 'dimchʌi' word line (dimchʌi, jimchʌi, and kim∫chi) from the Hanja '沈菜'. 'Ji', which is the last word variation of 'dihi', and is still used today as the unique form in several Korean dialects. In standard Korean, however, it only serves as a suffix to form the derivative names of various kimchi types. 'Dimchʌi' is believed to have appeared around the $6^{th}-7^{th}$ centuries, when Silla began to master Chinese characters. Hence,'dimchʌi' reflects either the Archaic Chinese (上古音) or the Old Chinese (中古音) pronunciation of the Hanja, '沈菜'. With the palatalization of the plosive alveolar [t], 'dimchʌi' changed to 'jimchʌi'. The Yangban intellectuals' rejection of the palatalization of the plosive velar [k] led to the hypercorrection of 'jimchʌi' into 'kimchʌi'. It is precisely the hypercorrect 'kimchʌe' that gave the wordform 'kim∫chi', which has eventually become the standard and predominant form in today's Korean language. Regarding 'thimchʌe', it reflects the Middle Chinese (Yuan Dynasty) pronunciation of the Hanja '沈菜' and was used mainly in writing by Yangban intellectuals.

• Journal of Korean Society of Forest Science
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• v.31 no.1
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• pp.53-61
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• 1976

Though it is not easy for those who study dendrology to memorize all the scientific names of trees, the names remaines in their memory can facilitate the understanding of foreign technical books. The scientific name of a tree indicates characteristics of shape, color, and other aspects of the tree and by analyzing the name we can see common element found in other scientific names of trees. It is helpful to those who want to memorize and study the scientific names of trees if they understand their etymology. The preseut study is the seconds report of the investigation which aims at examining the etymology of the scientific names of native and foreign trees growing in Korea and their original names not only at the habitat but in Japan, China, England, Germany, and France. While the first report, which was made known in Theses Vol. 9. (The City College of Seoul 1975), is the examination of the scientific names of trees belonging to Gymnospermae, the present report is that of scientific names of trees belonging to Piperales: 2 families, 2 genera and 2 species; and trees belonging to Salicales: 1 family, 3 genera, 44 species, 16 varieties, and 3 forms. As the etymology of the scientific names of trees is made clear, this study will help those who want memorize the scientific names and study foreign technical books and it is also useful for international interchange of trees. The classification is depended chiefly on Dendrology by Prof. Lee Tchang-bok and "Plant Resources of Korea" shown in Biblography No. 10; the native names of trees on Jumoku Daizusetsu by Dr. Uehara; and etymology on A source-Book of Biological Names and Terms by E.C. Jager. In the column of etymology of the scientific names for genera, species, varieties and forms, Gr. stands for Greek, L. for Latin, NL. for New Latin, and genit. for genitive.

• Journal of the Korean Society of Safety
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• v.35 no.3
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• pp.105-115
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• 2020

This study compares the difference of fit factors (FF) and visual acuity according to masks and eyeglasses preferences for 54 participants. We the precautions and behaviors of discomfort when wearing masks of eyewear wearers. Contact lens discomfort and priority action of complaints was investigated Glasses fitting factors is Optical Center Height(OH), Vertex Distance(VD) and Pantoscopic Angle(PA). We measured those factors and expressed by the ratio of standard point and change point. Quantitative fit factor was measured by Portacount Pro+ 8038. Also, we selected to 6 exercises among 8 exercises OSHA QNFT (Quantitative Fit testing) protocol to measure the fit factors. The pass/ fail criterion of FF was set at 100. Visual acuity(VA) test chart is developed by Chunsuk Han was used, Descriptive statistics was performed. Descriptive statistics(SAS ver 9.2), it is used geometric means, Wilcoxon analysis(P=0.05) When wearing the mask preferentially, fit factor(FF) was high according to the step of glasses fitting parameter. on the other hand, when the glasses first choice, the visual acuity(VA) was high. there was no significant difference. In the case of fit factor (FF), mask first choice/ glasses first choice is OH (p=0.671/ p=0.332), VD (p=0.602/ p=0.571) and PA (p=0.549/ p=0.607). Visual acuity (VA), mask first choice/ glasses first choice is OH (p=0.753/ p=0.386), VD (p=0.815/ p=0.557) and PA (p=0.856/ p=0.562). The workers of workplace and office chose glasses but occupational health workers and students chose mask. In case of discomforts, it was suggested to remove the mask and tolerate discomforts. The main discomforts and usual action of lens were dryness, hyperemia, foreign body sensation, ophthalmodynia, decreased vision and glasses wearing. Therefore, it is necessary to develop a mask wearing method education program considering glasses fitting and develop a hybrid model that minimizes inconvenience when wearing glasses and a mask at the same time.

• Journal of the Korean Geographical Society
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• v.32 no.4
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• pp.479-490
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• 1997

This study attempted to grasp the etimological meaning of the ancient place name Dumo, and to identify when the ancient place names in Dumo system started to be used by Korean people. The results of analysis of generic toponym and specific toponym of the ancient place names in Dumo system are as follow: Firstly, Chumong, the name of the founder of the Koguryo Dynasty, and his two sons Biryu,the founder of the kingdom Biryu-Paekche, and Oncho, the founder of the kingdom Paekche, are presumed to originate from place name, not from person's name. Particularly, the name of Chumong is considered to be a person's name which comes from Dumo system. Oncho, who claimed to be a son of Chumong, a person of north-Puyo, transterred the capital of his kingdom to the present site of Dumo in Chunggung-dong, Hanam city in present, which is thought to be an early capital of Paekche or a part of it. Secondly, the word of Dumo means a warm space which is surrounded by mountains, protected from wind, endowed with river which provided with water. This kind of spatial cognition gradually evolved as the prototypical locational artifice which was diffused to Manchuria and Japan, and is believed to be introduced to the Korean Peninsula.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.14 no.5
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• pp.527-535
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• 2003

In this paper, the performance of W-CDMA system with smart antenna is analyzed for angular spread in realistic wideband multipath channel. The realistic wideband channel is assumed, one of which is JTC channel model. And each multipath is assumed as a reflective wave from only one direction (only one cluster) in space. Several multipaths within one chip are distinguished into each one and the strongest signal is selected. As a result, the performance of the W-CDMA system with smart antenna in realistic wideband multipath channel has been considerably improved in proportion to the increase of angular spread.

• Journal of the Korean Society of Tobacco Science
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• v.37 no.1
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• pp.8-17
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• 2015

The purpose of this study is to classify the tobacco names in the world, to investigate the regional distribution of the classified type, and to show origin of names according to the type. The names of tobacco used in this study was 50. The type of tobacco names was classified by the presence or absence of nasal sound(morn) on the first syllable, the Number of syllable, and the structure of consonants and vowels of tobacco names. Type I (Dambago) has the nasal sound on the first syllable. The proportion of Type I(Dambago) was 28%. And the rest(Type I~Type V ; 72%) has no nasal sound. Type II(Tabaco) has three syllables, and its proportion was 20%. Type III(Tabac) has the two syllables and the structure of T+vowels+B+vowels. And its proportion was 30%. Type IV(Tutun) has the two syllables and the structure of T+vowels+T+vowels. And its proportion was 12%. Type V(Duhan) has the two syllables and the structure of D+vowels+H(V)+vowels. And its proportion was 10%. The world's most widely distributed type was Type I(Dambago). regional distribution of the world's tobacco names were clustered by the type. 72% of Type I(Dambago) was distributed in Asia. The etymology of Type I(Dambago) was only 14% Tambaku and the other is not yet known. The etymology of Type I(Dambago) seems to be derived from the Haitian Tambaku(meaning a tobacco pipe). 88% of Type II(Tabaco) and III(Tabac) were distributed in Europe. The etymology of Type II(Tabaco) and Type III(Tabac) were 84% Spanish "Tabaco". 100% of Type IV(Tutun) and V(Duhan) were distributed in Europe. The etymology of Type IV(Tutun) and Type V(Duhan) were 100% Turkish tutun and duhan, respectively. This finding suggests that the etymology of Type I(Dambago) is certainly may be Haitian "Tambaku(meaning a tobacco pipe)".

• Journal of the Korean Society of Food Culture
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• v.12 no.1
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• pp.17-22
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• 1997

The two Korean words, Solon-Tang and Su-Ra-Sang, are generally assumed as the names of Mongolian foods which seem to have been used in Korea due to the influence from the enhanced close relationships between Mongolia and Koryo. This indicates that the two words have very important meaning in stdying the relationship between the food culture in the central asia in those days and the terminologies used in the palaces in the eras of Koryo and chosun and so have attracted continuously the related scholars‘ attention. 1. The theory of folk etymology; it is originated from its cooking that first they cut meat into small pieces and put them into a cauldron and boil sulrong sulrong (which means such boiling state in that its water bubbles up) for a along time. 2. Early of the chosun time, the king himself comes to 'Sun-Nong-Dan' where he teaches the people how to farm and hold a large festival and after that they boil the cow meat soup and feed the people around there. At that time, they name and call the kuk-bub (soup with rice) which they eat at the 'Sun-Nong-Dan' 'Sun-Nong-Tang'. 3. The India Sanskrit Sura, a kind of liquid (in which component that have someone who takes it drunken) which gods enjoy themselves over, comes into the palace on the latter half of Koryo time via Mongolia and affects and becomes the Korean words. 4. The Mongol Suru or Sulru which is a cooking in that they boil meat putted in plain water comes into Korea under the special historic relation between Mongolia and becomes Solon-Tang. For the details of the above mentioned theories, we will fully discuss the origin through studying concretely the related books and mutual comparing history, linguistic periods and phonetic changes accordingly and the changes in meaning and vocabulary forms here.

• Korean Journal of Psychosomatic Medicine
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• v.9 no.1
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• pp.3-15
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• 2001

The term 'memory' has acquired so many meanings today that it is not even confined to the mental domain any longer, although it is etymologically derived from the Anglo-Saxon word 'gemund', meaning mind. In its most typical sense, memory can be defined as 'the reawakening of the past in the service of present'. But in many papers, the term memory has been used in a various different meaning, which made the interpretation of the research result very complicated. Recently there has been tremendous development in the neurobiological researches with regard to the memory. This paper reviewed the concept, history, and current tendencies of the memory and memory researches comprehensively for the purpose of showing future direction of the memory researches.