• Journal of Korea Port Economic Association
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• v.36 no.2
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• pp.37-52
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• 2020

This study deals with the terms of three connection factors that promote air cargo transportation in the east-south area: a firm's subjective factors, industrial environment factors, and governmental policy factors. According to the analysis results, a firm's subjective factors (4.48) scored highest of the three promotion factors, followed by industrial environment factors (4.20) and government policy factors (3.88). Therefore, it is important to promote to air cargo transportation in the east-south area a firm's subjective factors (1) to procure concentrated market strategy and real market capacity, (2) to procure speedy satisfaction of customer needs and confidence, (3) to enhance aviation route development, and (4) to enhance business ability of airlines and forwarders. Next, air cargo transportation should be promoted in the east-south area by considering industrial environment factors and government policy factors.

• Child Health Nursing Research
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• v.21 no.1
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• pp.55-63
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• 2015

Purpose: The purpose of this study was to identify cell phone addiction in school-age children and factors influencing addiction. Methods: The participants were 163 parents of elementary school students in the 1st to 4th grades. Data were collected through self-report questionnaires completed by the parents, and analyzed using the SPSS/WIN 19.0 IBM program. Results: Of the children, 86.5% were reported as being average users, 9.2%, at risk users, and 4.3%, at high risk users. Cell phone addiction in the children was significantly different according to games played by the children and parents' monthly income. Significant factors influencing cell phone addiction in the children were children's self-control, games played by the children, parents' cell phone addiction and parental control for children's cell phone use, explaining 24% of variance in cell phone addiction. Conclusion: The findings indicate that cell phone addiction in school-age children is influenced by parent-related factors as well as personal factors. Therefore approaches to education programs on cell phone use in school-age children should include parent-related factors as well as personal factors of the children.

• The Journal of Society for e-Business Studies
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• v.19 no.4
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• pp.1-19
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• 2014

Efforts to identify user's recognition which exists in the big data are being conducted actively. They try to measure scores of people's view about products, movies and social issues by analyzing statements raised on Internet bulletin boards or SNS. So this study deals with the problem of determining how to find the emotional vocabulary and the degree of these values. The survey methods are using the results of previous studies for the basic emotional vocabulary and degree, and inferring from the dictionary's glosses for the extended emotional vocabulary. The results were found to have the 4 emotional words lists (vocabularies) as basic emotional list, extended 1 stratum 1 level list from basic vocabulary's glosses, extended 2 stratum 1 level list from glosses of non-emotional words, and extended 2 stratum 2 level list from glosses' glosses. And we obtained the emotional degrees by applying the weight of the sentences and the emphasis multiplier values on the basis of basic emotional list. Experimental results have been identified as AND and OR sentence having a weight of average degree of included words. And MULTIPLY sentence having 1.2 to 1.5 weight depending on the type of adverb. It is also assumed that NOT sentence having a certain degree by reducing and reversing the original word's emotional degree. It is also considered that emphasis multiplier values have 2 for 1 stratum and 3 for 2 stratum.

• 대한공업교육학회지
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• v.31 no.2
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• pp.41-63
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• 2006

The purpose of this study was to establish and apply 'term learning strategy' for learners whose basic skill, interest, and motivation for learning is lower, and to increase the learned capabilities of subjects' 'industry introduction', required for industrial technical high school students. Another purpose was to identify when the learning strategy established was applied, its affect on how well learners understood terms in a particular unit of material, and, after instruction presented in accordance with 'term learning strategy,' evaluate the ease with which subjects understood the teacher's explanation of the unit of subject, how well they understand the main concepts of the unit of subject, and to what extent the presentation interested and motivated the subjects. The researcher established 'term learning strategy' based on the principles of Garg's "Nine Steps for Events of Instruction." The study included 35 first grade participants purposely selected from 33 classes at 1155 students in K industrial technical highschool. Data was collected via tests and surveys. Results indicated that 'term learning strategy' facilitated thorough understanding of terms and concepts related to the unit of subject, as well as a better understanding of the teacher's explanation and increased interest and motivation in learning. In addition, the "term learning strategy" increased interaction among learners in the instruction setting. Finally, implications of this study and implementation recommendations for this instructional strategy were presented.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.8 no.1
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• pp.187-192
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• 1998

Generally the solidified microstructures of materials consist of the columnar and equiaxed dendritic regions, and many theoretical studies about columnar-to-equiaxed transition have been done because that is closely related to the mechanical and physical properties of products. In this study, the modified equation based on the Hunt's analytical columnar-to-equiaxed transition condition which was derived from heterogeneous nucleation and grain growth in front of the columnar dendrite tip under directional solidification, was obtained applying the growth-velocity-dependent distribution coefficient and liquidus slope to Hunt's. The effects of the number of nucleation sites, nucleation temperature, alloy composition, growth velocity and liquid temperature gradient on the transition for Al-Cu alloys have been investigated.

• KDI Journal of Economic Policy
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• v.17 no.1
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• pp.107-126
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• 1995

본(本) 연구(硏究)는 자본거래자유화정도를 명목상의 규제완화여부에 의해 판별하는 종래의 접근방법(接近方法)에서 벗어나, 형식적(形式的) 규제여부(規制與否)에 관계없이 자본거래(資本去來)가 실질적으로 경제적(經濟的) 유인(誘引)에 따라 얼마나 활발하게 이루어지고 있는가를 측정함으로써 자본거래자유화정도(資本去來自由化程度)를 평가할 수 있는 방법을 모색하고 있다. 이와 관련해서 본 연구는 모두 5가지 접근방법을 시도하고 있다. 그 첫째는, 총대외무역량대비 자본거래량비중으로서 자본거래량이 상대적으로 증가하면 자본거래자유화정도가 높다고 본다. 둘째는, 환율절하기대를 감안한 국내외실질 금리차로서 대내외자본거래(對內外資本去來)가 자유로울수록 국내외금리차(國內外金利差)는 낮아질 것이기 때문에, 동 금리차가 낮을수록 자본자유화정도가 높다고 본다. 동 지수로서는 통화선물시장의 존재 여부에 따라 위험포함 및 불포함 대내외금리차를 사용할 수 있다. 셋째로는, 다소 복잡한 계량경제학적 방법을 통해 국내외실질금리간의 연계관계를 측정하는 방법으로서 두번째 방법의 개선에 해당된다. 그리고 넷째로는, 셋째번 방법에 의한 연계관계를 시간변동지수로 전환하여, 시간의 경과에 따른 자본자유화정도의 변화를 측정하고 있다. 마지막으로는, 자본거래를 위험자산의 국제교역관계(國際交易關係)로 파악하여, 무역에 있어서의 산업내교역지수측정방법을 자본거래에 적용하여 자본거래총유출입지수를 측정하였다. 동 지수는 저축투자갭의 보정적(補正的) 거래차원을 넘어 위험자산거래 자체를 위한 자본거래의 정도를 측정함으로써 순수하게 자본거래 자체의 메커니즘에 의해 자생적으로 일어나는 자본거래의 활성화정도에 대한 척도가 될 수 있을 것으로 판단된다. 이상의 방법들을 주로 한국(韓國), 일본(日本), 대만(臺灣) 등에 적용해서 평가한 결과 한국의 자본거래자유화정도(資本去來自由化程度)는 일본에 비해서는 낮지만 대만에 비해서는 높으며, 특히 90년대 들어 크게 향상된 것으로 평가되었다.

• Korean journal of food and cookery science
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• v.7 no.1
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• pp.35-43
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• 1991

Ssooksulgis made with different levels of Mugworts were tested to investigate the texture characteristics by sensory evaluation and mechanical test in this study. As a result of the sensory evaluation for Ssooksulgis with the levels of 0%, 10%, 20%, 30% and 40% , the consistency, texture, moistness and flavor were increased according to the increase of the added Mugworts. In view of color and overall quality, 30% Ssooksulgis was preferable than those of other mixing levels. In the texturometer measurement for Ssooksulgis, hardness tend to decrease, while springiness and cohesiveness tend to increase according to the increase of the added Mugworts. As for Ssooksulgis, the consistency and moistness in sensory evaluation correlated significantly with the cohesiveness and correlated negatively with hardness, chewiness, gumminess in mechanical test (p<0.01).

• Proceedings of the Korea Association of Crystal Growth Conference
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• 1996.06b
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• pp.239-257
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• 1996

$\beta$-BaB2O4는 고출력 가시광선 및 적외선을 발진시키는데 유용한, 비선형 특성을 가진 물질이다. $\alpha$-$\beta$ 상전이 온도가 녹는점보다 18$0^{\circ}C$ 낮기 때문에 보통 flux법으로 단결정을 성장시킨다. 수년전 Itoh등은 $\beta$-BaB2O4단결정을 congruent조성의 용액으로부터 Czochralski법으로 metastable한 상태에서 직접 성장시켰다. 그렇지만 그 공정은 잘 이해되지 않고 있으며 재현하기가 매우 어렵다. 저자들은 $\beta$-BaB2O4단결정을 용액표면온도도 1034$^{\circ}$-1085$^{\circ}C$, pulling rate 3mm/h, 10-30 rpm의 범위에서 성장시켰으며 융액표면의 온도구배는 $\beta$-상으로 성장시키는데 매우 중요한 인자로 여겨진다. Seed로는 직경 1-2mm의 c축방향 $\beta$-BaB2O4단결정 봉이 상용되어 성장방향을 조절하고 열응력을 최소화시켰다. 성장된 $\beta$-상의 단결정들은 6-fold모양을 하며 표면에 작은 비늘같은 것들이 붙어있고 중심부에 core가 있는 것을 알았다. Flux법으로 성장시킨 $\beta$-BaB2O4단결정을 사용한 seeds는 단결정 성장 및 냉각 중에 cracks이 자주 발생하였으며, boule의 cracks은 afterheater를 사용할 경우 다소 줄일 수 있었다. 성장된 단결정의 광학특성이 측정되었다.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.127-127
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• 2016

지난 수년간 4대강 살리기 사업으로 해당 하천은 16개 보로 막혔고 이로 인해 하천수위는 과거 대비 보상류지역은 높아지고 보 하류지역은 낮아졌다. 이에 따라 수문학적 관점에서 기존의 지표수-지하수 연계 특성에 많은 변화가 발생하였다. 이러한 특성 변화 등을 관측하기 위하여 4대강 사업 전, 후로 주요하천 주변 제내지에 지하수 관측정이 설치되었다. 본 연구에서는 4대강 주변 관측정을 대상으로 각 관측정의 지하수위와 지하수위 영향인자들 간의 상관관계를 분석하고, 관측정의 주요영향인자를 판단할 수 있는 지하수 관측정 평가방법을 제시하였다. 각 인자별 상관관계 분석은 피어슨 상관계수를 이용하였으며, 관측정 수위와 주요 영향인자(하천수위, 강우량)의 피어슨 상관계수가 0.7 이상이면 상관성이 높은 것으로 평가하였다. 낙동강 하천 주변 30개소 관측정에 적용한 결과, 10개소는 지하수위와 하천수위와의 상관계수가 0.70~0.93로 상관도가 높은 것으로 평가되었고, 20개소는 지하수와 하천수위와의 상관계수, 지하수와 강우량과의 상관계수 모두 낮은 것으로 분석되었다. 본 연구 결과는 대상 관측정의 모니터링 지속여부 결정, 목적에 맞는 대체 관측정 설치 등 향후 관측정들의 효율적이고 합리적인 관리를 위한 기초자료로 활용할 수 있을 것으로 판단된다.

• The Journal of Engineering Geology
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• v.24 no.2
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• pp.283-295
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• 2014

Groundwater monitoring wells are important to maintain their performance for long term monitoring. The monitoring wells with extensive internal incrustation by clay adsorption were selected for this study. The performance of these monitoring wells was improved by pump washing, tube replacements for dedicated samplers, and well surging. After each improvement, the Mg, Mn, and Zn concentrations were increased. The results show that under these conditions, the monitoring wells must be carefully inspected at least once a year. Even in the case of no abnormal phenomenon like as internal incrustation, the monitoring wells need to be serviced at least once every four to five years to guarantee that they are effectively monitoring groundwater quality.