• 한국사회정책
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• v.25 no.1
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• pp.321-343
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• 2018

This paper aims to apply the convergence theory into the minimum income guarantee which forms the moral foundation of the welfare state. The research question of this paper is if the level of minimum income guarantee among EU member states (EU-15) gradually converging into a certain level. For this purpose, Chapter 2 describes the convergence and diversion of welfare states since the Second World War, and chapter 3 explains the historical development of the EU social policies since the Rome Treaty (1957). Chapter 4, which is the main body of this paper, analyzes if the level of minimum income guarantees of EU member states is converging by the coefficient of variation analysis and regression analysis. However, converging trend of the level of basic income guarantee among EU member states has not been proved. In other words, social policy arena still remains strongly in the realm of national sovereign states, irrespective of growing pressure from the supra-national governing body like the EU. It is in line with the Abram de Swaan's argument that "welfare states is nation states" (1994: 110).

• Proceedings of the Korean Geotechical Society Conference
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• 2003.03a
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• pp.439-446
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• 2003

In this paper the model tests have been conducted and the results are compared with those by the theoretical methods to study the behaviors of the piled raft. The size of model box is 2.2m${\times}$2m${\times}$2m. The raft is made of rigid steel plate and piles made of steel pipes. Generally the bearing capacity of group piles is designed with only the pile capacities, and the bearing capacity of raft is ignored. But the uncertainty of pile-raft-soil interaction leads to conservative design ignoring the bearing effects of raft. In the case of considering the bearing capacity of raft, the simple sum of bearing capacity of raft and that of each pile cannot be the bearing capacity of piled raft. Because the pile-raft-soil interaction affects the behavior of piled raft. Thus the effects of pile-raft-soil interaction are very important in the optimal design. In this paper, the behaviors of piled raft are studied through model tests of 2${\times}$2, 2${\times}$3, and 3${\times}$3 pile groups. The spacing between piles is changed in the model tests. And the behaviors of free standing and piled raft are also studied.

• Journal of the Korean Society of Marine Environment & Safety
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• v.21 no.5
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• pp.577-582
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• 2015

This paper is the fundamental study for the application of cold storage system to the transportation equipment by sea and land. This numerical study presents the solid-liquid phase change phenomenon of calcium chloride solution of 30wt %. The governing equations are 1-dimensional unsteady state heat transfer equations of $1^{st}$ order partial differential equations. This type of latent heat storage material is often usable in fishery vessel for controlling the temperature of container with constant condition. The governing equation was discretized with finite difference method and the program was composed with Mathcad program. The main parameters of this solution were the initial temperature of heat storage material, ambient temperature of cold air and the velocity of cold air. The data of boundary layer thickness becomes thin with the increasing of cold air flowing velocity and also the heat storage completion time become shorten.

• Korean Journal of Heritage: History & Science
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• v.45 no.3
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• pp.28-59
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• 2012

The $Sh{\grave{a}}ngdu$ site in the Yuan Dynasty of China, a capital city located in the northern steppe area characterised by the nomadic life, has received great attentions from a number of travellers, historians and archaeologists. Several famous European travellers described vividly the city structure and civil life of $Sh{\grave{a}}ngdu$ from the Yuan Dynasty onwards. Since the begging of the modern era, a number of foreign expeditionists and historians explored $Sh{\grave{a}}ngdu$ and published research reports. From the 20th century, mainly Chinese and Japanese historians and archaeologists carried out the relatively detailed historical researches and archaeological surveys to the $Sh{\grave{a}}ngdu$ site; and published books, articles and excavation reports. More detailed and scientific archaeological investigations, mappings and excavations have been conducted since 1990s. This paper aims to progress basic discussion to the city structures of the $Sh{\grave{a}}ngdu$ site based on the previously conducted researches by expeditionists, geographers and archaeologists and the full scale investigations, which have been carried out since the late 20th century.

• Journal of the Korean Society of Radiology
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• v.15 no.3
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• pp.381-390
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• 2021

The purpose of this study was to examine the lecture satisfaction of radiological science majors in total remote classes due to coronavirus disease 2019, and influencing factors were analyzed. An online survey was conducted from September 1, 2020 to November 15, 2020, lecture satisfaction, teaching presence, academic motivation, self efficacy, behavior regulation and usage simplicity of remote classes for 458 3 and 4-year radiological science majors located in the Yeongnam area. Lecture satisfaction was significantly different according to grade, self-review time, and preferred teaching method. In addition, lecture satisfaction showed a significant positive corrleation with the teaching presence and usage simplicity of remote classes. In the multiple regression model, lecture satisfaction showed a significant explanatory power of 45.7% through usage simplicity, teaching presence, self efficacy and academic motivation. This study was attempted to provide basic data to increase the effect of remote classes at universities that are expected to expand in the post-corona.

• Journal of the Korea Institute of Building Construction
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• v.22 no.5
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• pp.507-518
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• 2022

The purpose of this research is to obtain experimental data for developing a structural design of an external insulation system by evaluating the shear performance of a composite insulation system according to the adhesive type. The shear performance of the composite insulation system was experimentally evaluated by considering a simultaneous placement method, full and spot/edge coverage using adhesive mortar. As a result of the test, the shear strength of simultaneous placement and full coverage method was almost similar, the spot/edge coverage method was about 80% of them. Also, the simultaneous placement method is considered to be constructively advantageous when applied as an external insulation system to a high-rise building compared to using an adhesive mortar.

• The Journal of the Korea Contents Association
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• v.21 no.5
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• pp.310-323
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• 2021

In this study, we analyzed the application of flipped learning in the untact online classes, focusing on thr social and engineering subjects of universities. Due to the unprecedented situation of COVID-19, the professors and learners were unable to conduct the face-to-faceclasses, and the existing flipped learning classes were analyzed separately from the social and engineering subjects. In particular, the results of this study will provide the basic data on the direction of post-corona-era university classes in that it can increase the effectiveness of flipped learning if it is linked to the flexibility of the university's academic system such as intensive course.

• 한국공간정보시스템학회:학술대회논문집
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• 2005.05a
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• pp.157-164
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• 2005

본 연구는 해양환경을 파악하는 데에 가장 기초적인 자료라고 할 수 있는 수심자료를 GIS 데이터로 구축하여 1979년부터 2004년까지의 금강하구의 수심변화를 정량적으로 분석하였다. 금강하구는 시간이 흐를수록 수심이 깊어지는 지역보다는 얕아지는 지역이 점진적으로 늘어가고 있으며, 금강하구둑의 수문 폐쇄, 남 북측 도류제 및 북방파제 축조, 서측호안 매립공사 등이 완공되거나 진행되어진 1990년대 중반 이후에는 수심이 얕아지는 면적이 증가함과 동시에 얕아지는 정도가 보다 급진적으로 진행되어 2004년에는 하구둑 전면과 대죽사주는 저조시에 해수면 위로 노출되는 해저면의 높이가 4m이상에 이르는 부분이 확산되었다. 금강하구 내 수심변화특성은 지역적으로 다소 차이를 보이므로 5개의 세부지역으로 구분하여 살펴보았다. 하구둑-군산내항, 군산내항-군산외항, 개야수로, 대죽사주 지역은 현시점에 가까워질수록 수심이 얕아지는 경향이, 도류제 지역은 수심이 깊어지는 경향이 뚜렷이 나타났으며, 서측호안 지역은 시기별로 얕아지는 경향과 깊어지는 경향이 교차되며 나타났다. 하구둑-군산내항, 군산내항-군산외항, 개야수로, 대죽사주 지역에서 꾸준한 준설공사가 있었음에도 불구하고 수심이 얕아지고 있다는 것은 퇴적작용이 매우 우세하게 진행되고 있음을 시사한다.

• Proceedings of the Korean Vacuum Society Conference
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• 2013.02a
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• pp.690-690
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• 2013

Field에 설치된 PV모듈은 가혹한 외부 환경에 노출되어 외부 하중, 온도 변화, 자외선, 수분 등의 영향을 받게 된다. 특히 PV모듈 내부로 수분이 침투 하였을 경우에는 태양전지와 전극의 부식 등 발전성능을 크게 저하시킬 수 있다. 이러한 외부 환경으로부터 태양전지가 안정적으로 발전할 수 있도록 PV 모듈은 전면재료인 유리와 후면재료인 Back Sheet를 진공 상태에서 압력을 가해 봉합하는 Lamination 공정을 거쳐 제작 되어 진다. 특히 Lamination 공정에 사용되는 EVA (ethylene vinyl acetate)는 PV모듈의 내구성능을 좌우할 수 있는 가장 중요한 재료중 하나이다. 본 논문에서는 Lamination 공정에 사용되어지는 EVA의 수분 침투의 특성에 관한 연구를 수행하였다. 공정 조건에 따른 EVA에 침투 되는 수분의 양을 확인하기 위해 Lamination 공정 조건을 변경하여 실험을 진행하였다. 그리고 외부 환경 변화에 의한 영향을 확인하기 위해 EVA가 수분에 노출 되는 시간과 온도를 변화시켜 보았다. 실험의 결과는 외부에 노출된 PV 모듈의 내부에 침투할 수 있는 수분의 양을 예상할 수 있게 하며, 수분 침투에 의한 내구성의 저하를 감소시키기 위한 최적의 Lamination 공정 조건과 봉합재 선정을 위한 기초 자료를 제공한다.

• 한국지구과학회:학술대회논문집
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• 2006.02a
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• pp.29-37
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• 2006

최근 나타나고 있는 이공계기피 현상으로 인해 우리나라 과학계 및 과학교육은 큰 위기를 맞고 있다. 21세기 국가의 생존을 위해서는 과학기술의 발전이 그 무엇보다도 중요하다. 과학기술 기반을 튼튼히 하기 위해서는 과학기술계에 종사할 적절한 수준의 인적자원이 필요하며, 이와 같은 인적자원 육성은 초중등학교 과학교육에서 기초가 다져진다고 할 수 있다. 교육과정은 학교 교육의 기본 설계도라고 할 수 있기 때문에 교육과정이 어떻게 개정되느냐에 따라 초중등학교의 과학교육은 엄청난 영향을 받게 된다. 현재 제7차 교육과정이 전면적으로 시행되고 있으나 국가${\cdot}$사회의 다양한 요구에 의해 교육과정 개정이 불가피하게 되었으며, 이에 따라 교육인적자원부는 교육과정 개정을 추진하고 있다. 이와 같은 중요한 시기에 우리 나라 과학교육의 문제점과 발전 방안을 모색하는 것은 매우 의미 있는 일이 다.