• 무역학회지
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• 제45권6호
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• pp.207-225
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• 2020

Korea has studied FTA over 20 years since FTA with Chile. More than 3,000 Articles have been published in journal so far. Thus, this study aims to present the direction that should be taken by Korean FTA study by using Meta-Analysis for FTA study which has been carried on so far. Many researchers publish several articles each year, showing high quotation index and H-index. However, Korean FTA study lacks network with overseas researchers and fusion study with other sciences. 65.4% of Korean FTA study is carried on Independent research and 91.1% of them, in joint research by fewer than 2 persons. Further, the Subject of FTA study is not diverse and too uniform. Out of total studies, 24.3% of them are related to rules of origin and 15.3% of them, to China, showing that theme of study is quite partially concentrated. This is large difference with overseas FTA study. Study on rules of origin is only 1.5% in overseas. Korean FTA study needs to diversify subjects of study and to balance between academic aspect & practical aspect. When it comes to study methodology empirical analysis assumed large portion in both Korea and overseas countries. Empirical analysis assumes 18.3% in Korea and 47.3% in overseas, both of which are quite high. However, qualitative study such as FGI/AHP, in-depth interview, case analysis is quite rare in Korean FTA study. Partial concentration of countries for study subject needs to be rectified also. In Korea, countries for FTA study is China 15.3%, EU 10.0%, USA 6.3%. In overseas, China assumes only 3.7% of study subject. It is required for Korean FTA study to extend study subjects & study area by forming global study network and to extend qualitative study with microscopic study.

• 센서학회지
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• 제21권5호
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• pp.324-328
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• 2012

In the past a few decades, various kinds of cells have been examined in laboratories all over the world, and their interesting results have been expressed through various methods in journal publications. For a representative example, the increment or reduction of cell numbers during a bio-related experimental process has been demonstrated using the hazard ratio in survival analysis or in the form of a graph. In addition, the condition of cells such as their normality or abnormality would be indicated by the images of the cell nuclei or membranes treated with proper fluorescent labeling. However, the above methods seem to not be quantitative but rather qualitative assessments, which might be difficult to provide people with the eidetic understanding through parameters or numerical data. With adequate suggestions on any indices enabling the explanation for cell conditions, some analyses may be underestimated due to the lack of objectiveness caused by merely linguistic evaluation for the cell conditions, not numerally scientific interpretation. Therefore, in this study, we would suggest some indices enabling quantitative analysis on the cellular conditions.

• 대한전기학회논문지
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• 제32권2호
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• pp.50-58
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• 1983

In this paper, a field trial of the Korean-made optical fiber communication system is described. This system was installed between Gu-Ro and Ann-Yang telephone offices on November 1981, and carries a 44.7Mb/s NRZ signal(672 voice channel equivalent). For this trial, optical fiber cable, optical terminal equipment, optical repeater, fusion splicer and measurement equipment have been developed. Employing graded index optical fiber at a wave length of $0.85\;\mu\textrm{m}$, average optical attenuation and splicing losses of 3.6 dB/km and 0.4 dB, resectively, were realized. With link margins of 8~20dB and bit error rate of less than $10^{-10}$, this system has been carrying live traffic between Seoul and Ann Yang telephone offices.

• 한국광학회:학술대회논문집
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• 한국광학회 2001년도 제12회 정기총회 및 01년도 동계학술발표회
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• pp.4-5
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• 2001

Advent of lasers offering high intensity beam has opened the glass to the nonlinear optic (NLO). The high electric field associated with such laser beams can be so large that high order components of the glass polarization can be measured. Such development is of scientific and technological interests in particular in systems involving an intensity-dependent refractive index and/or ultra-fast response (＜10$\^$-12/s). From a scientific viewpoint the NLO response intensity must be understood as a function of the glass composition. On the other hand, large family of applications are presently under investigation in various fields of optical materials or systems e.g. laser glasses for fusion energy, soliton propagation for ultra-long distances, ultra-fast-switching, optical storage etc....(omitted)

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
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• pp.507-515
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• 2002

Remote Sensing Monitoring and Loss Estimated System of Flood Disaster based on GIS is an integrated system comprised flood disaster information receiving and collection, flood disaster simulation, and flood disaster estimation. When the system receives and collects remote sensing monitoring and conventional investigation information, the distributional features of flood disaster on space and time is obtained by means of image processing and information fusion. The economic loss of flood disaster can be classified into two pus: direct economic loss and indirect economic loss. The estimation of direct economic loss applies macroscopic economic analysis methods, i.e. applying Product (Industry and Agriculture Gross Product or Gross Domestic Product - GDP) or Unit Synthetic Economic Loss Index, direct economic loss can be estimated. Estimating indirect economic loss applies reduction coefficient methods with direct economic loss. The system can real-timely ascertains flood disaster and estimates flood Loss, so that the science basis fur decision-making of flood control and relieving disaster may be provided.

• 센서학회지
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• 제30권3호
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• pp.131-138
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• 2021

The optimization of the specifications of vertical silicon on insulator (SOI) slot optical waveguides suitable for integrated-optical biochemical sensors was performed through computational analysis of the confinement factor of the guided mode distributed in the slot in addition to analytical examination of the TE mode. The optimized specifications were confirmed based on sensitivity in terms of the change in the refractive index of the biochemical analyte. When the slot width, rail width, and height were set to 120 nm, 200 nm, and 320 nm, respectively, the confinement factor was evaluated to be about 56% and the sensitivity was at least 0.9 [RIU/nm].

• 한국IT서비스학회지
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• 제22권1호
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• pp.1-14
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• 2023

This paper aims to share the course, performance and implications of Project-Based Learning (PBL) education in healthcare data science (HDS). The HDS team of the business group of Soonchunhyang University, which was selected for the health care field of 'University Innovation Project', considered that the health care IT-based education of the current university differs greatly from the rapidly changing health care 3.0 environment of the fourth industry, and emphasized the PBL practice-oriented specialization program as a learning model. The PBL focused on self-directed learning experiences, real analysis problems, and team-oriented classes. In other words, it was implemented with three specialized strategies: 'Field Inside Education', 'Fusion-type Track Education', and 'Training to strengthen resilience and change response'. This collaborative, practical learning experience, etc. resulted in significant results. The results were recognized as being rated A by the Korea Research Foundation and the comprehensive evaluation, and the results were significantly elevated through the analysis of the student survey and the results index.

• Smart Structures and Systems
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• 제15권2호
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• pp.335-353
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• 2015

Previous long-term measurements of the Uldolmok tidal current power plant showed that the structure's natural frequencies fluctuate with a constant cycle-i.e., twice a day with changes in tidal height and tidal current velocity. This study aims to improve structural health monitoring (SHM) techniques for offshore structures under a harsh tidal environment like the Uldolmok Strait. In this study, lab-scale experiments on a simplified offshore structure as a lab-scale test structure were conducted in a circulating water channel to thoroughly investigate the causes of fluctuation of the natural frequencies and to validate the displacement estimation method using multimetric data fusion. To this end, the numerical study was additionally carried out on the simplified offshore structure with damage scenarios, and the corresponding change in the natural frequency was analyzed to support the experimental results. In conclusion, (1) the damage that occurred at the foundation resulted in a more significant change in natural frequencies compared with the effect of added mass; moreover, the structural system became nonlinear when the damage was severe; (2) the proposed damage index was able to indicate an approximate level of damage and the nonlinearity of the lab-scale test structure; (3) displacement estimation using data fusion was valid compared with the reference displacement using the vision-based method.

• 한국수자원학회논문집
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• 제51권2호
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• pp.89-98
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• 2018

위성자료는 광범위한 지역의 변동성을 관측하기에 매우 유리하다는 특성 때문에 최근 기후변화로 인한 자연재해 등의 연구에서 각광받고 있다. 하지만 위성자료에도 여전히 시 공간적인 해상도의 한계가 있으며, 이를 극복하기 위해 다양한 센서의 융합이나 1차 산출물들을 조합하는 방법을 사용한다. 본 연구에서는 천리안 위성의 GOCI와 MI에서 관측되는 자료를 융합함으로써 500 m 공간 해상도의 지표면 온도 자료를 생산하였고, 정규 식생지수와 함께 사용하여 TVDI를 산정하였다. 산정된 TVDI를 통해 한반도의 토양수분 상태를 모니터링 하고자 하였으며, 이를 비교하기 위해 ASCAT 지표 토양수분 자료를 통해 산정된 SSMI와 비교하였다. 그 결과 천리안 TVDI와 SSMI가 대한민국 전역에서 비슷한 공간 분포를 나타냈으며, 천리안 위성을 활용하여 토양수분을 관측할 수 있는 가능성을 제시하였다. 따라서 본 연구에서 산정 된 한반도의 TVDI가 고해상도의 토양수분을 산정하는 기반이 될 수 있고, 이를 통해 천리안 위성의 활용 범위가 보다 확장되어 다양한 연구의 기반이 될 수 있을 것으로 보인다.

• Journal of Korean Neurosurgical Society
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• 제58권4호
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• pp.350-356
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• 2015

Objective : Cases of contralateral radiculopathy after a transforaminal lumbar interbody fusion with a single cage (unilateral TLIF) had been reported, but the phenomenon has not been explained satisfactorily. The purpose of this study was to determine its incidence, causes, and risk factors. Methods : We did retrospective study with 546 patients who underwent a unilateral TLIF, and used CT and MRI to study the causes of contralateral radicular symptoms that appeared within a week postoperatively. Clinical and radiological results were compared by dividing the patients into the symptomatic group and asymptomatic group. Results : Contralateral symptoms occurred in 32 (5.9%) of the patients underwent unilateral TLIF. The most common cause of contralateral symptoms was a contralateral foraminal stenosis in 22 (68.8%), screw malposition in 4 (12.5%), newly developed herniated nucleus pulposus in 3 (9.3%), hematoma in 1 (3.1%), and unknown origin in 2 patients (6.3%). 16 (50.0%) of the 32 patients received revision surgery. There was no difference in visual analogue scale and Oswestry disability index between the two groups at discharge. Both preoperative and postoperative contralateral foraminal areas were significantly smaller, and postoperative segmental angle was significantly greater in the symptomatic group comparing to those of the asymptomatic group (p<0.05). Conclusion : The incidence rate is not likely to be small (5.9%). If unilateral TLIF is performed for cases when preoperative contralateral foraminal stenosis already exists or when a large restoration of segmental lordosis is required, the probability of developing contralateral radiculopathy is increased and caution from the surgeon is needed.