• MALSORI
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• no.21_24
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• pp.111-122
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• 1992

본 논문에서는 한국어에 있어서 세 가지 유형의 파열음과 일본어에 있어서 두 가지 유형의 파열음과 일본어에 있어서 두 가지 유형의 파열음이 보여주는 시간적 특성을 어두 위치 및 모음간 위치로 나누어 비교해 보았다- 한국어에 있어서 세 가지 유형의 파열음은 어두 위치에서 모두 무성음으로 실현되므로 성의 대립으로는 이들을 유형화 할 수 없고, 그보다는 조음의 힘과 기식의 유무에 따라 연음, 무기 경음, 유기 경음으로 분류하는 것이 타당하다. 이에 비해 일본어 파열음은 유성음인 연음과 무성음인 경음의 두가지 유형으로 대립된다. 유성음과 무성음, 그리고 유기음과 무기음의 구분에는 파열음의 개방에서부터 성대 진동까지의 시간인 성 시작 시간(VOT)과 기식의 길이가 변수가 된다. 경음과 연음의 구분에는 선행 모음의 길이, 폐쇄 지속 시간, Vl/(Vl+CL)의 비율이 유용한 정보가 된다. 양국어 어두 파열음의 VOT를 비교해 볼 때, 일본어 유성음은 음수의 VOT를 가지며, 한국어 무기 경음에서는 VOT가 10msec정도로 짧게 나타나고, 그 다음으로 한국어 연음. 일본어 무성음, 한국어 유기 경음의 순서로 길어진다. $\frac{선행 모음의 길이}{(선행 모음의 길이+폐쇄 지속 시간)}$의 비율은 언어의 특성도 반영해 주는데, 한국어의 경우 연음: 무기 경음: 유기 경음의 비는 0.63: 0.30:0.35, 일본어의 경우 유성음:무성음의 비는 0.69: 0.45로 나타났다. 청취 실험을 통해 한국인의 자음 인식 경향을 살펴본 결과, 성대 진동의 유무를 변별적으로 사용하지 않는 한국인 화자는 일본어 유성음은 연음으로, 무성음은 경음으로 인식하는 경향이 있는 것으로 나타났다.

• Journal of Korean Tunnelling and Underground Space Association
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• v.12 no.1
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• pp.75-85
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• 2010

The focus of this study is to evaluate the field applicability of the newly developed inorganic thixotropic-grout in various ways. In order to do this, the volume stability and the permeability of the inorganic thixotropic-grout have been measured and compared to the existing silica type grouts. In addition, the filling capability of the grout into the tail void has been evaluated through both an experiment with a miniature tail-void filling equipment and a test filling at the shield TBM construction site. The volume loss of the inorganic thixotropic-grout after a 14 day-curing under the atmosphere condition was appeared to be minimal. The excellent waterproofing ability of the inorganic thixotropic-grout was confirmed through a permeability test. The toxicity of the inorganic thixotropic-grout has been evaluated through a toxicity test of aquatic fishes (KS M 0111) and the pH value of the liquid eluviated from inorganic thixotropic-grout was measured as an average of 8.0 and a fatality rate of goldfish after 96 hours was 10% or so. The existence of harmful heavy metals in the liquid eluviated from the inorganic thixotropic-grout has been also examined through an atomic absorption spectroscopy (AAS) test. Any of harmful heavy metals were not detected and the detected level of $Cr^{6+}$ and Cd was far below the standard. Based on both an experiment with a miniature tail-void filling equipment and a test filling at the shield TBM construction site, the filling ability of inorganic thixotropic-grout into the tail void was proved to be excellent.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2007.04a
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• pp.149-150
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• 2007

현재 널리 적용되고 있는 유기에폭시 도장의 경우에는 부식환경을 차단하는 등의 일반적인 차원에는 상당히 우수하나, 열이나 빛에 의한 열화 및 부식 문제와 환경오염 등의 문제를 가지고 있다. 이를 해결하기위한 방법으로 순수 무기계의 액상 규산질을 바인더로 사용한 도료의 제작을 시도하였으며, 열화성능평가시험을 통해 그 적용가능성에 대해 검토하였다. 실험결과 환경친화적인 -Si-O-Si- 결합의 1액형 무기 규산질 도료의 제작이 가능하였으며 향후 여러 가지 성능 중 특히 내식성, 내산성 및 광택성 등의 보완연구가 선해오디어야 할 것으로 사료된다.

• Korean Journal of Ichthyology
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• v.34 no.3
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• pp.186-200
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• 2022

In order to understand the species composition and distribution characteristics of larval assemblages in the East Sea, Korea, larvae were collected at 13 stations every other month from February to December 2018. Fish larvae were identified through DNA barcoding along with morphological methods, and as the result, a total of 104 taxonomic groups appeared during the survey. Among these, Engraulis japonicus, which accounted for 76.2% of the total population, was the most dominant species, followed by Maurolicus japonicus, which accounted for 15.0%. In addition, Ammodytes personatus, Champsodon snyderi, Scomber japonicus and Echelus uropterus appeared more frequently than other taxa. The above six species accounted for 93.2% of the total catch. The number of taxa and the amount of larvae collected in the survey area were higher during the high water temperature periods (June to October) than during the low water temperature periods (February, April and December). Analysis of similarity (ANOSIM) showed a statistically significant difference in monthly larval assemblages. The results of the canonical correspondence analysis (CCA) show that the distributions of larval community were mainly affected by sea surface temperature during low water temperature periods, and various environmental factors such as salinity, dry weight of zooplankton, and the concentrations of nutrients during high water temperature periods.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.23 no.5
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• pp.255-264
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• 2013

Cobalt aluminate ($CoAl_2O_4$) is a highly stable pigment with excellent resistance to light, weather, etc., which has resulted in widespread use as a ceramic pigment. Due to the unique optical characteristics, $CoAl_2O_4$ is generally used as a coloring agent to decorate porcelain products, glass, paints and plastics. Here, $CoAl_2O_4$ pigments were synthesized by polymerized complex method and solid state reaction. Then $CoAl_2O_4$ pigment were grinded using the attrition milling with 1 mm size zirconia ball for 3 hours. The attrition milling process was performed at the constant speed of 800 rpm and ball to powder weight ratio (BPR) was 100 : 1. The characteristics of synthesized pigment were analyzed by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), particle size analyser (PSA) and CIE $L^*a^*b^*$. The XRD patterns of $CoAl_2O_4$ show single phase spinel structure. The particle size of $CoAl_2O_4$ measured by FE-SEM, TEM and PSA analysis was in the range of 100~200 nm. The blue color of obtained $CoAl_2O_4$ pigments could be confirmed through CIE $L^*a^*b^*$ measurement.

• Journal of the Korea Society of Computer and Information
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• v.27 no.10
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• pp.235-243
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• 2022

This paper aims to find promising export items for market expansion of defense export items. Germany, the UK, and France were selected as export target countries to obtain unstructured forecast data on weapons system acquisition plans for the next ten years by each country. Using the TF-IDF in text mining analysis, keywords that appeared frequently in data from three countries were derived. As a result of this paper, keywords for each country's major acquisition projects drawing. However, most of the derived keywords were related to mainstay weapon systems produced by domestic defense companies in each country. To discover promising export items from text mining, we proposed that the drawn keywords are distinguished as similar weapon systems. In addition, we assort the weapon systems that the three countries will get a plan to acquire commonly. As a result of this paper, it can be seen that the current promising export item is a weapon system related to the information system. Prioritizing overseas demands using key words can set clear market entry goals. In the case of domestic companies based on needs, it is possible to establish a specific entry strategy. Relevant organizations also can provide customized marketing support.

• Journal of the Korean Society of Food Science and Nutrition
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• v.37 no.7
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• pp.886-890
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• 2008

Levels of minerals, vitamin, amino acids, fatty acids and chemical compositions were determined in the fleshy parts that are used for food. The moisture, crude protein, crude lipid, crude ash and carbohydrate contents of masou salmon were $73.6{\pm}0.4$, $17.7{\pm}0.3$, $3.3{\pm}0.2$, $1.3{\pm}0.1$ and $4.1{\pm}0.2%$, respectively. Potassium was the highest followed by phosphorus, calcium and sodium. The vitamin C and E levels in masou salmon were 600 and $200\;{\mu}g/100\;g$, respectively. Sixteen amino acids were detected and essential amino acids among them are threonine, valine, methionine, isoleucine, leucine, phenylalanine, lysine, arginine, and histidine. Oleic acid was the most abundant fatty acid in masou salmon and polyunsaturated fatty acids were EPA, DHA, linoleic acid, $\alpha$-linolenic acid, $\gamma$-linolenic acid and arachidonic acid. These results may offer a scientific basis for the commercial use of masou salmon.

• 한국신재생에너지학회:학술대회논문집
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• 2005.06a
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• pp.37-41
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• 2005

풍력을 이용한 풍력발전기의 전력변환 시스템을 개발하기 위해서는 바람의 특성을 정확히 분석하고 이를 대치할 수 있는 모의시험 장치인 시뮬레이터가 필수적이다. 모의시험 장치는 풍향 풍속등의 인자들을 입력받아 회전자 블레이드의 토오크를 전동기가 대신해서 발전기에 공급하게 된다 본 논문에서는 풍력발전 모의시험 장치를 이용하여 750-kW gearless형 풍력발전기의 축소모델인 20-kW 모델 발전기와 고효율의 전력변환 장치 설계 및 인버터 특성을 위한 시험용 지그에서의 시험한 결과를 보이고자 한다.

• Vending industry
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• v.4 no.4 s.12
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• pp.32-34
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• 2004

튀는 사진이 뜨는 사업성으로 연결되는 시대이다. 국내 최초로 보고 즐길 수 있는 스티커자판기가 지난 98년 폭발적인 시장 인기를 기록한데 이어 이미지 포토, 목걸이 사진, 메달 사진, 명함사진, 폰카인화사진 등 다양한 형태의 튀는 사진들이 뉴 트랜드 사진 사업영역을 열어오고 있다. 이제 사진도 튀지 않고서는 성공하기 힘든 시대. 최근 큰 인기가 예상되는 뉴 트랜드 사진 사업이 등장해 화제가 되고 있다. 자판기를 이용해 이용자의 모습을 찍어 스탬프로 제작, 다양한 재미와 실용성을 만끽할 수 있는 제품이 바로 그것. 드림윅에 의해 전개되는 드림스탬프 자판기는 뛰어난 품질력와 엔터테인먼트성을 무기로 시장 돌풍을 준비하고 있다. 어뮤즈먼트자판기 시장의 새로운 기대주로 등장한 드림스탬프 자판기의 시장 성공 가능성을 진단해 본다.

• Journal of the Korean Society of Food Science and Nutrition
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• v.25 no.4
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• pp.672-679
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• 1996

In order to examine the quality attributes of native-bee honey, proximate composition and mineral components were analysed by atomic absorption spectrometry, ion chromatography and high performance liquid chromatography. The analytical results showed that native-bee honey is higher in the contents of crude ash, crude protein and diastase activity than those of foreign-bee honey. The principal mineral components of honey were Ca, Mg, Na, K and Cl, which showed that almost all the mineral components were contained higher in the native-bee honey than the foreign-bee honey samples. When we calculated K/Na ratio, we could make a clear distinction between native-bee honey and foreign-bee honey. The K/Na ratio turned out to be more than 10 in 6 samples of native-bee honey, whereas the ratio of foreign-bee honey showed up less than 1.5 in all 3 samples.