가시광선 활용을 위한 Ag 도핑 흑색 ZnO 나노 광촉매 합성

김의준,이승효 한국표면공학회 2023 한국표면공학회 학술발표회 초록집 Vol.2023 No.5

The characteristics of zircon as the evidence for post-magmatic remobilization of REE and HFSE in the northern Motzfeldt alkaline igneous complex, southern Greenland

김의준,양석준,노상건,박성원,이승렬,김유동,조진희 한국지질과학협의회 2018 Geosciences Journal Vol.22 No.6

The Motzfeldt intrusions in the Gardar Province, southern Greenland, split into syenitic plutonic and hypabyssal rocks, in which the latter include ring dykes and sheet intrusions. Sheet intrusions, considered as the source for rare earth elements (REE) and high field strength elements (HFSE), comprise sheets of peralkaline microsyenite (SPM), syenitic pegmatite (SP), and peralkaline microsyenite (PM). SP exhibits extremely high concentrations of REE and HFSE, which are positively correlated with increasing alkalinity from early towards late intrusion, caused by magmatic processes. In contrast, some of the SPM and PM are also significantly enriched in REE and HFSE, caused by post-magmatic fluids. The REE- and HFSE-rich phases in SP consist mainly of zircon and allanite with smaller amounts of pyrochlore in pseudomorph from the inferred eudialyte, whereas some of the PM and SPM consist of pyrochlore, REE-carbonate, and zircon in the matrix. The zircon grains in the Motzfeldt Sø Formation (MSF) syenite occur in interstitial spaces, exhibiting an association with magnetite and a bipyramidal form in texture. They are characterized by a highly fractured and embayed rim. Zircons from PM and SP are clearly enriched in Fe, Al, Ca, Na, Y, P, Hf, Y, P, Nb, Ta, and REE, and are depleted in Zr and Si in comparison with magmatic zircon. They also show a clear trend of higher LREE/HREE and Eu/Eu* ratios, and lower Ce/Ce* ratios, which define them as typical hydrothermal zircons. In contrast, zircons from the MSF syenite show a relatively lower LREE/HREE ratio and Eu and Ce anomalies of a similar magnitude compared with those from SP and PM. The occurrence and mineral composition of the zircon suggest that post-magmatic fluids have played an important role in the remobilization of REE and HFSE as well as the primary concentration of REE and HFSE, caused by magmatic processes.

적정 교통투자 규모 산정: CGE모형을 중심으로

김의준 국토연구원 2013 국토연구 Vol.79 No.-

The purpose of this study is to estimate the optimal size of transportation investment subject to the economic growth rate and the price level of transportation services in Korea. The recursively dynamic Computable General Equilibrium model is developed with an emphasis on the transportation sectors. This study finds that the transportation investment could increase with the economic growth rates of Korean economy. The share of the investment to the GDP would be 2.939~2.944% under the zero economic growth rate, and the annual growth rate with 3% could lead to the increase of the share to 3.927~3.932%. In a sense that the demand for the transportation investments is completely derived from the profit maximization of the producer and the utility maximization of the household, so the social objectives such as the regionally balanced development, income distribution and regulation on the price inflation could generate quite different levels of the investments from the estimates of this study. 본 논문의 연구 목적은 일반균형이론의 관점에서 우리나라 경제성장률과 교통 서비스 가격의 변동에 따라 교통투자의 적정 규모가 어떻게 변동하는지를 분석하고자 한다. 분석 틀은 교통 중심의 동태 연산일반균형모형으로 1개 소비자-1개 정부-10개 생산자로 구성되어 있다. 주요 결과를 살펴보면, 우선 경제 성장이 향상되면서 국내총생산 대비 교통투자 수요도 늘어나는 것으로 나타났다. 경제성장률이 0%일 경우 투자 수요는 국내총생산 대비 2.939~2.944%로 추정되었으며, 성장률이 2%일 경우 3.606~3.611%, 성장률이 4%일 경우 4.240~4.245% 등으로 나타났다. 각 성장 대안별로 국내총생산 대비 교통투자 수요 비중 범위가 0.01% 포인트 미만이라는 점에서 투자 수요에 미치는 가격 요인은 크지 않다고 볼 수 있다. 교통투자 수요 추정치는 경제 주체의 효율성을 목표로 도출되었다는 점에서 목적 함수를 지역 균형 개발, 소득 배분, 고용 효과의 극대화, 물가 상승 억제 등으로 변경한다면 교통투자 수요 값이 달라질 수 있다.

영남지역인구변동의경쟁및 보완관계분석

김의준,변태근 국토연구원 2003 국토연구 Vol.37 No.-

The focus of this study is on analyzing regional competition and complementarity of Yeongnam Region in terms of spatial interactions of population with Dendrinos-Sonis Model. Overall, there is no spatial autocorrelation in the population distribution in Yeongnam Area with respect to Moran's I, Local Moran's I and Geary C. It implies that the population of each region is independently distributed, not affected by the degree of population distribution in adjacent regions. But, negative spatial autocorrelation occurred in Busan, Daegu, and Ulsan among cities and counties.

소연평도 각섬암 내 화성기원 층상구조와 Fe-Ti 산화광물의 농집에 관한 예비연구

김의준,Kim, Eui-Jun 대한자원환경지질학회 2017 자원환경지질 Vol.50 No.5

Amphibolite-hosted Fe-Ti mineralization at the Soyeonpyeong Island, located in central western part of the Korean Peninsula is a typical orthomagmatic Fe-Ti oxide deposit in South Korea. The amphibolite intruded into NW-SE trending Precambrian metasedimentary rocks. Lower amphibolite is characterized by igneous layering, consisting of feldspar-dominant and amphibole-Fe-Ti oxide-dominant layers. The igneous layering shows complicated and/or sharp contact. In contrast, upper amphibolite has a more complicated lithofacies (garnet-bearing, coarser, and schistose), and massive Fe-Ti oxide ore alternates with schistose amphibolite. NS- and EW-trending fault systems lead to redistribute upper amphibolite-hosted Fe-Ti orebody and igneous layering of lower amphibolite, respectively. The whole-rock compositions of amphibolite and Fe-Ti oxide ore reflect their constituent minerals. Amphibolite shows significantly positive Eu anomalies whereas Fe-Ti oxide ore has weak negative Eu anomalies. Plagioclase (Andesine to oligoclase) and Fe-Ti oxide minerals have constant composition regardless of their distribution. Amphibole has a compositionally variable but it doesn't reflect the chemical evolution. Mineral compositions within individual layers and successive layers are relatively constant not showing any stratigraphic evolution. This suggests that there are no successive injections of Fe-rich magma or assimilation with Fe-rich country rocks. Contrasting Eu anomalies between amphibolite and Fe-Ti oxide ore also suggest that extensive plagioclase fractionation during early crystallization stage cause increase in $Fe_2O_3/FeO$ ratio and overall Fe contents in the residual magma. Thus, Fe-rich residual liquids may migrate at the upper amphibolite by filter pressing mechanism and then produce sheeted massive Fe-Ti mineralization during late fractional crystallization.

투입산출 구조분해를 이용한 지역별 산업구조와 생산성의 연계성 분석

김의준,이유진,장재원,최은진 한국지역학회 2011 지역연구 Vol.27 No.4

The purpose of this study is to examine the relationship between regional industrial structure and the productivity growth. For this purpose, this paper uses three structural decomposition methods to analyse regional industry differences in 2005 Multiregional Input-Output table such as push-pull analysis, Q-analysis, and output decomposition analysis. This paper finds that the forward and backward effects of service sectors are substantially strong in Seoul Metropolitan, Kangwon and Jeju area in terms of Push-Pull analysis and Q-analysis. In addition, the output decomposition analysis shows that the above three regions could lead to high levels of technological innovation in the service sectors. However, the result cannot confirm any causality between the service intensive growth and the productivity level for Baumol's paradox in Korea. 본 연구의 목적은 투입산출 구조분해를 이용하여 지역별 산업구조와 생산성 증대효과에 대한 연계성을 분석하는 것이다. 2005년도 지역 산업연관표의 압출-흡입 분석(Push-Pull Analysis)과 Q-분석을 통해 지역 간 산업구조의 차이를 규명하고, 생산량 변화 분해 분석(Output Decomposition Analysis)을 통해 지역별 생산성의 차이를 분석하였다. 압출-흡입 분석에 있어서는 수도권, 강원권 및 제주권의 서비스업 연계효과가 높은 값을 나타냈다. 또한, 수도권, 강원권, 제주권의 서비스업 전방연계효과가 높게 나타나고, 강원권, 제주권은 후방연계효과에서도 높은 값을 나타냈다. 마지막으로 서비스화와 생산성 변화 간의 연관관계를 살펴보기 위해 전 산업의 기술 수준에 따른 생산량 순위를 살펴본 결과, 지역의 서비스화와 전체 산업의 생산량 순위는 일치하지 않아 결과적으로 국내에서는 보몰의 역설이 성립하지 않는 것으로 나타났다.

기술정보 : 세계 탄탈륨의 부존특성과 광화작용

김의준,문동혁 한국광물학회 2013 광물과산업 Vol.26 No.-

법률앱 사용자의 혁신저항 및 사용의도에 관한 연구

김의준,반영환 차세대컨버전스정보서비스학회 2025 차세대컨버전스정보서비스기술논문지 Vol.14 No.2

본 연구의 목적은 법률 앱 사용자의 혁신 저항 요인을 탐색 및 규명하여, 효과적인 법률 앱 서비스 확산 방안을 모색하는 데 있다. 이를 위해 법률 앱 사용 경험을 가진 일반인을 대상으로 온라인 설문조사를 하였으며, 수집된 자료는 SPSS 27.0, Amos 23.0 프로그램을 이용하여 분석하였다. 연구분석 결과, 사용장벽, 가치장벽, 전통장벽이 혁신 저항에 정(+)의 영향을 미치는 것으로 나타났으며, 이는 사용자가 기술을 자신의 삶에 통합하는 과정에서 기존 가치나 습관과의 충돌이 주요한 저항 요인이 됨을 시사한다. 하지만, 위험장벽과 심리적 거리감은 혁신 저항에 유의미한 영향을 미치지 않는 것으로 나타났다. 또한, 혁신 저항 수준이 높을수록 법률 앱에 대한 사용 의도는 낮아지는 것으로 확인되었다. 본 연구는 법률 서비스 분야의 디지털 전환 과정에서 사용자 중심의 서비스 설계가 중요함을 강조하며, 이러한 방안들은 사용자의 수용성을 높이고 혁신 저항을 극복하여 법률 서비스의 디지털화가 원활하게 이루어지는데 요구된다. The purpose of this study is to explore and identify the factors of innovation resistance of legal app users and to find an effective way to spread legal app services. To this end, an online survey was conducted on the general public with experience in using legal apps, and the collected data were analyzed using SPSS 27.0 and Amos 23.0 programs. As a result of the research analysis, it was found that barriers to use, value barriers, and traditional barriers had a positive (+) effect on innovation resistance, suggesting that the conflict with existing values or habits is a major resistance factor in the process of users integrating technology into their lives. However, it was found that risk barriers and psychological distance did not have a significant effect on innovation resistance. In addition, it was confirmed that the higher the level of innovation resistance, the lower the intention to use the legal app. This study emphasizes the importance of user-centered service design in the digital transformation process of the legal service field, and these measures are required to increase user acceptance and overcome innovation resistance to facilitate digitalization of legal services.

수도권 광역철도 건설의 우선순위 : 운영효과를 중심으로

김의준,지우석,배유진,최명섭 한국지역학회 2008 지역연구 Vol.24 No.3

This paper is concerned with an analysis of railroad investments on regional economic growth of Gyeonggi province using two production-accessibility and the investment-inducing models. With regard to the regional economic impacts per construction costs, the Ori-Osan project is evaluated as the most efficient one in generating regional value added. The next one is followed by Shin-Asan, Bugok-Neunggok, Soutern-Wing, Byeong-Rae, Poseung-PyungTaek and Daegok- Wonsi projects. 본 연구는 철도투자의 지역경제적 측면을 고려하여 접근성 향상에 따른 지역내총생산 증대효과와 민간투자 증대효과 등 운영효과 측면에서 지역경제 파급효과를 추정할 수 있는 방법을 적용하여 수도권 광역철도 계획노선의 지역경제효과를 평가하였다. 분석노선은 경기도 철도기본계획 수립 연구(경기도, 2006)에서 교통수요와 접근성 측면에서 우선순위가 높다고 분석한 10개 노선으로 한정하였다. 공사비 대비 지역경제 파급효과를 토대로 수도권 광역철도의 우선순위를 도출하면, 1단계(중단기) 측면에서 투자 우선순위가 높은 사업은 오리오산선, 신안산선, 부곡능곡선, 수도권남부선, 별내선, 포승평택선, 대곡원시선 등의 순으로 나타났으며, 2단계(초장기) 측면에서는 제2공항철도선, 포천선, 수도권외부선 등의 순서로 나타났다.

기후변화가 지역 과수 생산에 미치는 영향 분석

김의준,지앙민,진동영 강원대학교 농업생명과학연구원 2023 강원 농업생명환경연구 Vol.35 No.4

This study analyzed the effects of climate change on apple and pear production. The fruit production function was estimated with spatial econometric models. The regional production changes in 2040 according to climate change scenarios were simulated based on the spatial error model. First, the production of apples and pears will decrease due to climate change, with apples in Gyeongbuk and pears in Chungnam expected to experience the largest declines. Second, the production of apples and pears will decrease by 4.7 times and 2.0 times when temperature and precipitation or sunshine duration changes, respectively, are considered compared to when only temperature is considered an independent variable in the simulation model. Finally, production losses of 70.934%-97.048% and 90.984%-98.595% are expected for apples and pears, respectively, when the greenhouse gas (GHG) reduction policy was implemented compared to that without the GHG reduction policy. This study is expected to contribute to providing references for the local government to implement GHG reduction strategies and cope with the reduction of fruit production due to climate change.