• 한국정보시스템학회:학술대회논문집
• /
• 한국정보시스템학회 2004년도 추계학술대회
• /
• pp.201-208
• /
• 2004

Many organizations experience that the Performance they gained from IT portfolio is lower than they expected values. As with any investment, executives are concerned with maximizing the performance from their investment in IT. This study focused on the relationship or fit between orientations of IT strategy and directions of IT portfolio to maximize IT performance. A field survey of chief information officers of Korea manufacturing sector was conducted in 2003. Complete data of 147 firms was analyzed to determine relationship among the three research constructs that are orientations of IT strategy, directions IT portfolio, and IT performance. In this study, the orientations of IT strategy have two dimensions that are operation orientation and market orientation. The directions of IT portfolio have two dimension that are internal system focused and external system focused. And the IT performance has divided into operational performance and competitive performance. As a result of this study, the companies that are putting a focus with operation orientation were concentrated on internal information systems than external information systems. On the other hand, the other companies that are focused on market orientation were concentrated on external information systems than internal information systems. Consequently, the companies that are focused on operation orientation were operational performance higher than competitive performance and the other companies that are focused on market orientation were competitive performance higher than operational performance. More importantly, the research results provide empirical evidence that supports the hypothesis related to closer fit between IT strategy and IT portfolio does lead to increase operational and competitive performance of IT. And the results emphasize manager's efforts of fit between orientations of IT strategy and directions of IT portfolio to be realized IT performance.

• 한국콘텐츠학회논문지
• /
• 제20권5호
• /
• pp.271-280
• /
• 2020

복수 유명인 옹호광고는 광고 캠페인에서 흔히 볼 수 있는 형태다. 그러나, 복수 유명인 옹호광고의 효과에 관한 연구는 많지 않다. 특히 본 연구는 복수 유명인 옹호광고에 미치는 영향 요인들에 대해 살펴보고자 한다. 포트폴리오-브랜드 적합도, 포트폴리오-유명인 적합도, 그리고 포트폴리오 유명인-소비자 적합도라는 요인들이 복수 유명인 옹호광고 상황에서 광고태도 및 구매의도에 영향을 미치는 세가지 요인들로 실험에 포함되었다. 연구결과, 포트폴리오-브랜드 적합도, 포트폴리오-유명인 적합도, 그리고 포트폴리오 유명인-소비자 적합도는 소비자들의 광고태도에 긍정적인 영향을 미치는 요인들임이 밝혀졌다. 더 나아가, 이 세가지 요인들간의 상관관계가 통계학적으로 유의미한 중요성을 가지고 있다는 것이 나타났다.

• 공학교육연구
• /
• 제3권2호
• /
• pp.71-83
• /
• 2000

최근 교육평가의 논의에서 포트폴리오는 대안적 평가의 한 유형으로 부각되고 있다. 즉 포트폴리오 평가는 평가의 보편적인 접근과는 달리 학생들의 학습 활동을 전 시간에 걸쳐 수집하고 평가하는 혁신적인 평가 방법으로 대두된다. 특히 공학교육에서의 이러한 접근은 공학교육의 특성상 의미있는 접근이 되며, 이 연구에서는 공학교육에서의 포트폴리오의 평가의 개념을 논의하고 나아가 실제로 공학교육에서 포트폴리오를 평가에 적용할 수 있는 절차를 제안하는 것이었다. 이 연구의 탐색 결과는 학생들이 학습 목표를 도발하는데 서류화한 학생들의 활동 생산물을 수집하고 평가하는 유목적적, 체계적, 성찰적 과정으로 정의되며, 적용을 위한 절차는 포트폴리오의 목적, 내용, 평가, 활용의 네 단계를 제안하였다.

• International Journal of Advanced Culture Technology
• /
• 제8권2호
• /
• pp.12-17
• /
• 2020

This study was a similar experimental study that analyzed the effect by applying the learning portfolio completion. The study period lasted from October 1, 2019 to November 20, 2019. A total of 47 people participated in the study, and the effectiveness of the program was analyzed with the SPSS 18.0 program for critical thinking disposition. The statistical analysis method was frequency analysis and paired t-test. As a result of the analysis, the critical thinking disposition increased significantly in the application of the learning portfolio completion (Truth-seeking MD= -0.05, p <0.01), Open-mindness MD= 0.11, p <0.001), Analyticity MD= 0.76, p <0.001), Systematicity MD= -.25, p <0.001), Self-confidence MD=-0.54, p <0.001), Inquisitiveness MD=0.29, p <0.001), Maturity MD=-.0.33, p <0.001). In conclusion, the teaching method applied with the learning portfolio completion actually helped nursing students learn nursing students learn based on critical thinking. Based on these result, further research using learning portfolio is to be done and more systematic and practical application of learning portfolio completion to nursing students. This study would be used as a basic data for the study guideline development for learners.

• 한국경영과학회지
• /
• 제39권4호
• /
• pp.137-152
• /
• 2014

In this paper, I suggest several techniques to estimate covariance matrix and compare the performance of the global minimum variance portfolio (GMVP) in terms of out of sample mean standard deviation and return. As a result, the return differences among the GMVPs are insignificant. The mean standard deviation of the GMVP using historical covariance is sensitive to the estimation window and the number of assets in the portfolio. Among the model covariance, the GMVP using constant systematic risk ratio model or using short sale restriction shows the best performance. The performance difference between the GMVPs using historical covariance and model covariance becomes insignificant as the historical covariance is estimated with longer estimation window. Lastly, the implied volatilities from ELW prices do not lead to superior performance to the historical variance.

• 한국수학교육학회지시리즈D:수학교육연구
• /
• 제1권1호
• /
• pp.23-34
• /
• 1997

For the balanced realization of these values of mathematical culture, we need to innovate mathematics classrooms, for which we need to make use of portfolio assessment. First, portfolio assessment can be regarded as a method of synthesizing a variety of resources for systematic evaluation. Second, portfolio assessment can be used as a tool of building up learners' positive attitude toward mathematics, by which we can identify the latent possibility of learners' development and help them develop confidence in mathematics. Third, portfolio assessment can play an important role as a tool for exploring the method of teaching and learning in which learners recognize the value of mathematics and are interested in mathematical activities, as we have seen in the report on the Gulliver's Travels Project.

• 대한산업공학회지
• /
• 제39권6호
• /
• pp.535-545
• /
• 2013

The goal of stock investment is earning high rate or return with stability. To accomplish this goal, using a portfolio that distributes stocks with high rate of return with less variability and a stock price prediction model with high accuracy is required. In this paper, three methods are suggested to require these conditions. First of all, in portfolio re-balance part, Max-Return and Min-Risk (MRMR) model is suggested to earn the largest rate of return with stability. Secondly, Entering/Leaving Rule (E/L) is suggested to upgrade portfolio when particular stock's rate of return is low. Finally, to use outstanding stock price prediction model, a model based on Semi-Supervised Learning (SSL) which was suggested in last research was applied. The suggested methods were validated and applied on stocks which are listed in KOSPI200 from January 2007 to August 2008.

• 아태비즈니스연구
• /
• 제10권3호
• /
• pp.37-51
• /
• 2019

In this paper, we investigate the performance of anomaly factors in Asia-Pacific Stock market and show the higher Sharpe ratio of the volatility managed smart beta portfolio. The smart beta portfolio combines the benefit of passive strategy and active strategy. However, the smart beta portfolios are seems to be exposed to the risk of anomaly factors from the perspective of traditional financial equilibrium model. Therefore, the smart beta strategy may generate negatively skewed returns unappealing to investors having lower risk tolerance. Our empirical investigations find that the return of the Asia-Pacific region stock market is more volatile than other regions with the lower efficiency ratio. However, the value factor and the momentum factor of Asia-Pacific region both show good performances. More interestingly, we also find that managing the volatility of the momentum factor in Asia-Pacific stock market almost doubles the efficiency ratio.

• 유통과학연구
• /
• 제17권9호
• /
• pp.117-125
• /
• 2019

Purpose - We investigate how to increase consumer incentives to buy public offering funds, resulting in activating the public offering fund market. In particular, this study aims to find ways to expand diversity and to improve efficiency of public offering fund. The public fund market of Korea has been stagnant in recent years. However, the public offering fund market plays a very significant role in terms of consumer welfare. Since only a few wealthy investors can participate in the private equity market, the stagnation in the public offering fund market usually reduces the opportunity of consumer's buying funds thus ultimately affecting their future wealth. Research design, data, and methodology - To attain our purpose, the 'factor-based portfolio strategy' has been considered. It is an alternative portfolio strategy, which composites the advantages of the passive management and active management. For our empirical anaylsis, we used global stock distribution market data over the period of 1991 and 2016. Then we constructed portfolios based on firm-size, firm-value, and momentum. Finally, a regression model was set, then hypotheses were tested, analyzing the performances. Results - First, among the 15 factor-based portfolios of global, Europe, Asia-Pacific(ex Japan), US and Japan, in eight portfolios, positive excess returns are observed at 5% significance level. Further, there is another portfolio with positive excess return at 10% significance level. Second, most of the portfolios with significant excess performance show positive relationship with the market portfolio. However, the firm-value based portfolio in Asia-Pacific region shows no relationship, and the firm-value based portfolio in US shows negative relationship. Third, we confirmed that the two firm-value factor portfolios in Asia-Pacific region and US, not having positive relationship with market portfolio, provide significant excess returns. Conclusions - In this paper, we provide empirical evidences supporting that the factor-based portfolios expand the diversity of funds and improve the efficiency of investment performance. However, there is no guarantee that the efficiency will continue in the future. In addition, various constraints and costs must be considered. Nevertheless, our novel findings in the advanced financial market such as US and Asia-Pacific are very interesting and offers important implications.

• 공학교육연구
• /
• 제8권4호
• /
• pp.64-71
• /
• 2005

포트폴리오는 학생들이 비교적 오랜 교육기간 중에 수집한 학습결과물을 의미하며, 교육과정 이수 후의 학생들의 성취도를 잘 반영할 수 있고, 교육과정을 개선하고 다시 검토하여 프로그램을 되돌아 볼 수 있는 좋은 기회를 제공하는 이점을 지니고 있다. 이러한 포트폴리오의 평가방법으로서의 우수성을 공학교육의 프로그램학습성과 성취도 평가에 이용하려면, 본 기법에 대한 정확한 이해를 바탕으로 우리 교육 실정과 공학교육 프로그램의 특징을 살펴 적용하여야 한다. 따라서 본 연구는 공학교육 프로그램의 학습성과 평가도구로 학생 포트폴리오를 제안하며 실제 모델을 구축하여 프로그램학습성과 평가의 새로운 기법으로서 활용하고자 하였다.