• Journal of Korean Neurosurgical Society
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• v.64 no.1
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• pp.125-135
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• 2021

Objective : This study aimed to validate the Korean version of the Repeatable Battery for the Assessment of Neuropsychological Status Update (K-RBANS). Methods : We performed a retrospective analysis of 283 psychiatric and neurosurgery patients. To investigate the convergent validity of the K-RBANS, correlation analyses were performed for other intelligence and neuropsychological test results. Confirmatory factor analysis was used to test a series of alternative plausible models of the K-RBANS. To analyze the various capabilities of the K-RBANS, we compared the area under the receiver operating characteristic (ROC) curves (AUC). Results : Significant correlations were observed, confirming the convergent validity of the K-RBANS among the Total Scale Index (TSI) and indices of the K-RBANS and indices of intelligence (r=0.47-0.81; p<0.001) and other neuropsychological tests at moderate and above significance (r=0.41-0.63; p<0.001). Additionally, the results testing the construct validity of the K-RBANS showed that the second-order factor structure model (model 2, similar to an original factor structure of RBANS), which includes a first-order factor comprising five index scores (immediate memory, visuospatial capacity, language, attention, delayed memory) and one higher-order factor (TSI), was statistically acceptable. The comparative fit index (CFI) (CFI, 0.949) values and the goodness of fit index (GFI) (GFI, 0.942) values higher than 0.90 indicated an excellent fit. The root mean squared error of approximation (RMSEA) (RMSEA, 0.082) was considered an acceptable fit. Additionally, the factor structure of model 2 was found to be better and more valid than the other model in χ2 values (Δχ2=7.69, p<0.05). In the ROC analysis, the AUCs of the TSI and five indices were 0.716-0.837, and the AUC of TSI (AUC, 0.837; 95% confidence interval, 0.760-0.896) was higher than the AUCs of the other indices. The sensitivity and specificity of TSI were 77.66% and 78.12%, respectively. Conclusion : The overall results of this study suggest that the K-RBANS may be used as a valid tool for the brief screening of neuropsychological patients in Korea.

• 한국HCI학회:학술대회논문집
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• 2007.02b
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• pp.705-712
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• 2007

최근 뉴미디어 제품 디자인을 위한 텐저블 인터페이스(Tangible Interface)에 대한 연구 개발이 국내외에서 활발하게 이루어지고 있다. 이는 미래 미디어에 있어서 텐저블 인터페이스가 매우 중요해진다는 점을 시사한다. 현재 텐저블 인터페이스의 연구는 아직 초기단계이며 기술에 대한 의미, 컨셉트, 방향 등이 점점 구체화 되어가고 있는 실정이다. 따라서 본 연구는 실감공간기술(Tangible Space Initiative)이 다양한 방향으로 개발될 수 있는 잠재가능성을 가지고 있다고 보고 현실의 사회상과 다양한 미래기술을 반영할 수 있는 SF영화에서 많은 아이디어를 얻을 수 있을 것이라 생각했다. 이에 본 연구는 영화에 나타난 실감공간기술과 유사한 디지털 인터페이스를 적용된 감각, 전달된 정보의 종류, 세부 기술, 실감공간기술의 세가지 기본 컨셉트(사람과 사물의 상호작용, 사람과 사람의 상호작용, 사람과 정보 사이의 상호작용), 그리고 미디어 이용 동기 등을 기준으로 분석하고 유형화 해 보고자 한다.

• The Transactions of the Korean Institute of Electrical Engineers
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• v.41 no.4
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• pp.379-384
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• 1992

The Fe-base amorphous ribbons with 15mm width and about 20x10S0-6Tm thickness, (FeS179-xTCrS1xT)BS116TSiS15T and (FeS181-xTMnS1xT) BS112TSiS17T (x:0-6), were prepared melt spinner. The thickness of the ribbons followed by PFC (Planar Flow Casting). The initial permeability and total core losses were measured as a function of additive elements (Cr, Mn) and annealing conditions in high frequency for the purpose of using these materials as a core of magnetic amplifier and switched mode power supplies. The initial permeabilities were enhanced and core losses were decreased by non-magnetic field annealing in proper conditions. The lowest core loss in 0.2T/10kHz was measured at 3% Cr addition amorphous ribbon, and the loss was 5.6W/kg. The permeability of the ribbon at 10kHz was about 9000.

• Proceedings of the KSR Conference
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• 2010.06a
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• pp.1806-1813
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• 2010

In this paper, we investigate the development process of the quality assurance system ISO9001 in the railway industry and ISO/TS 16949 the quality system in the automotive industry. We study the international standard IRIS(International Railway Industry Standard) & TSI(Technical Specification for Interoperability) applied in railway industry. Throughout studying for the whole development process of the Rolling Stock Quality System, we are to review the necessity of the monitoring process and assesment process applied in IRIS & TSI guidelines. It will be the keystone enhancing our quality level to global level in railway industry.

• Journal of applied mathematics & informatics
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• v.30 no.5_6
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• pp.883-902
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• 2012

In this work we deal with a nonlinear dynamical system, namely the wastewater treatment model. We proceed to a dynamical analysis of the model. Invariance, boundness, controllability and the sensitivity with respect the initial conditions are studied. On the other hand, using the nonsmooth analysis tools, we look for the viability of the model, that is, the necessary and sufficient conditions under which trajectories move in a suitable time-moving sets, to avoid the washing problem (died of bacteria).

• International Commerce and Information Review
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• v.10 no.4
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• pp.221-250
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• 2008

This study investigated and analyzed the export competitiveness of Gyeonggi-Do and the effect of Korea-US FTA on its export competitiveness. By reviewing the current status of trade structure and implementing trade specialization index(TSI) of export commodities of Gyeonggi-Do, the investigation has listed the specific export commodities with competitiveness for increasing the volume of its export in the United States, in the short, mid and long run perspectives. From the findings in this study, it suggests specific trade and commercial policies to Korea-US FTA including implementing commodity-oriented export supporting system, strategic marketing method, economic-free-zone plan, R&D investment, export financing and regional economic cooperation.

• International Commerce and Information Review
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• v.10 no.1
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• pp.295-314
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• 2008

I compared trade structure and competitiveness by sector using industrial classification in UN Comtrade data and SITC. Based on the comparison, I calculated market share, export competitions, RCA, and TSI. and then selected sensitive industries based on competitiveness, and identified the ZOPA and our BATNA. These calculations confirmed the industries damaged by FTA and those benefiting from the FTA between Korea and Japan, the study them developed strategies for VIA negotiation. It is to minimize damages to Korean economy and to maximize benefits from the agreement. The negotiation plan allowed an adjustment period for industries, for which damages are expected, by setting a long grace period before implementing tariffs. Based on the negotiation plan made through economic analysis, I intend. contribute to more efficient promotion of negotiation by extracting the optimal FFA negotiation plan for each manufacturing industry.

• East Asian Journal of Business Economics (EAJBE)
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• v.7 no.3
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• pp.49-61
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• 2019

Purpose - This study shows that which country has more competitiveness in aerospace industry. The reason why author choose aerospace industry for research is aerospace industry is one of major business in every country in the world instead of infant industry. Research design and methodology - In order to research this topic, there are 3 tools to analyze competitiveness in aerospace industry. To achieve analysis of competitiveness between USA and England, UN comtrade program which provides huge database including time serial data. Results - All of TSI are over zero (0) which means that from 2000 to 2018, USA aerospace industry is export specialization as USA aerospace industry has comparative advantage against England aerospace industry. All of TSI in USA are approaching to figure +1 as export specialization except 2010. Conclusions - Even though RCA value in 2000 is 6.313, however, when time goes by and they are 8.997 in 2005, 8.007 in 2010 and 8.389 in 2015 respectively and RCA value is slightly going down as figure 7 in 2018. we review above market share analysis data, USA has overpoweringly superior competitive power against British aerospace industry.

• Proceedings of the Korea Society of Environmental Biology Conference
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• 2002.05a
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• pp.52-52
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• 2002

• Proceedings of the Korea Society of Environmental Biology Conference
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• 2002.05a
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• pp.68-68
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• 2002