• 한국콘텐츠학회논문지
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• 제11권2호
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• pp.495-506
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• 2011

요사이 많은 대학에서 사용하고 있는 학습포트폴리오는 학생의 학업 과정 및 산출물을 자료화하여 학업이력을 관리하고, 나아가 자기주도적 학습 역량을 기르는 목적으로 사용되고 있는데, 이를 웹상에서 제공할 경우, e-포트폴리오라고도 불린다. 그러나 대부분의 실제 사례를 살펴보면, 기대한 만큼 활발하게 활용 되고 있지 않으며, 관련 선행연구들도 대부분 소수 학생 사례 중심이거나 학습포트폴리오의 장단점에 대한 일반적인 연구로 이루어져 있다. 이에 본 연구에서는 좀 더 많은 학생을 대상으로 한 구체적인 활용 사례를 분석하여, 학습 포트폴리오를 학습도구로서 활성화시킬 수 있는 방안을 제시하고자 한다. 본 연구는 총 289명의 경희대학교 학부 학생들이 사용하고 있는 경희대학교 e-포트폴리오 프로그램을 대상으로 하였으며, e-포트폴리오 활성화 방안을 도출하기 위해, 학생들의 e-포트폴리오에 올라와 있는 '성찰저널'와 '참여 만족도 설문지'를 분석 자료로써 활용하였다. 그 결과에 따르면, 학생 대부분이 e-포트폴리오를 학습도구로는 활용하고 있지만, e-포트폴리오가 좀 더 활성화되기 위해서는 몇 가지 시스템 및 운영방법의 개선이 필요하다. 이에 본 연구에서는 참여 학생들의 요구사항과 국내외 대학에서 운영되는 e-포트폴리오 사례를 참조하여 e-포트폴리오 시스템의 개선이라는 측면에 초점을 두고 활성화 방안을 제안하였다.

• Fashion, Industry and Education
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• 제14권2호
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• pp.60-69
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• 2016

Visual literacy, a key element of a design portfolio, is achieved by communicating a consistent visual aesthetic with respect to design elements, design principles and individual style. Yet, students often feel challenged in articulating their personal aesthetic or design philosophy in order to create a unifying design identity within a body of artifacts. This paper shares some best practices on overcoming this challenge through students' engagement in self-reflection and identity formation processes. The implemented innovative strategy in a senior-level portfolio development course for apparel designers involved four different phases: 1) one-on-one meetings to self-reflect on previous design work, 2) selection and revision of artifacts, 3) peer-review and critiques of revised portfolio artifacts, and 4) development of a final ePortfolio to showcase a unified design identity. It was evident that recording students' initial self-reflection in the form of a metacognitive oral report encouraged and motivated identity development in their portfolio. Further, students expressed their satisfaction in the ability to participate in the selection process of artifacts by self-reflecting about what they wanted to highlight about themselves and why. Overall, student outcomes from this strategy exceeded expectations and the portfolios developed were successful in creating a cohesive design identity.

• 한국경영과학회지
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• 제28권1호
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• pp.25-36
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• 2003

Unlike the mean-variance approach, the stochastic dominance approach Is to form a portfolio that first-degree stochastically dominates a predetermined benchmark portfolio, e.g. KOSPI. Analytically defining the first derivative of the objective function, an optimal algorithm of nonlinear programming was developed to search a set of optimal weights systematically and tested with promising results against veal data sets from Korean stock market.

• Asia pacific journal of information systems
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• 제27권4호
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• pp.233-244
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• 2017

IT portfolio, meaning the ratio of investment with four different purposes of IT, is widely used for evaluating the adequacy of investment and its performance within firms. Despite of such a useful framework looking at investment on IT, IT portfolio in agriculture industry seems to be differentiated from other industries. In this study, we compared IT portfolios of farms: grain, field fruit and vegetable, greenhouse fruit, greenhouse vegetable, beef cattle and pig. We classified farms by their return on equity (ROE) in order to analyze the relationship between IT portfolio of each crop and performance. Then, we found patterns of IT portfolios of top-performance farms compared to all farms for each agricultural product. Lastly, peculiarities of each crop are interpreted and discussed to find out top-performance farms' IT investment patterns. From our study, it could be inferred that monotonous IT investments may not be as effective.

• Asian Journal of Business Environment
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• 제7권4호
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• pp.17-25
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• 2017

Purpose - The purpose of this study is to present a framework for determining the most appropriate business model for e-learning. Research design, data, and methodology - The Electronics Branch of Azad University has been elected as a case study in this research. This study conducted using a descriptive method. The information was obtained using interviews with experts including managers, faculty and students at the Electronics Branch of Azad University. Results - Three service-product system (product oriented system, use an oriented and result oriented system) approaches determined a framework for the formation of a portfolio. This portfolio is including three types of e-learning business models. Examining the relevant characteristics, correspondence of behaviorism learning theory with a product-oriented approach, correspondence of cognitivism theory with a user-oriented approach and in finally match correspondence of constructivist learning theory with a results-oriented approach which is evident. Conclusions - After reviewing the literature on the fields of e-learning, business model and product - service systems, we have achieved three types of e-learning business models. Then the variables in any of the business models were defined by using business model canvas tool and thus a portfolio consisting of three types of e-learning business model canvas was obtained.

• 대한산업공학회지
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• 제39권6호
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• pp.535-545
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• 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.

• 대한산업공학회지
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• 제3권1호
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• pp.55-59
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• 1977

This paper develops a portfolio management game applicable to Korean Stock Market with an emphasis on teaching and training aid. It allows each participant to start out with a certain amount of money and pick his favorable stocks from a list of stocks chosen by instructor. Each participant must make a transaction at each time period and he gets a readout that states his individual performance, i.e., stock lists, cash on hand, net worth, transactions he has made and rank in accordance with his net worth. This game package consists of 10 subprograms and 7 files written with Fortran language for use on the Nova 840 computer and is divided into 3 main categories according to their functions, i.e., book-keeping function, data processing function and information searching function. This package may be used for training portfolio decison makings in the stock market and for comparing various investment methods through hypothetical investments.

• Journal of applied mathematics & informatics
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• 제15권1_2호
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• pp.109-126
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• 2004

This paper deals with two problems of optimal portfolio strategies in continuous time. The first one studies the optimal behavior of a firm who is forced to withdraw funds continuously at a fixed rate per unit time. The second one considers a firm that is faced with an uncontrollable stochastic cash flow, or random risk process. We assume the firm's income can be obtained only from the investment in two assets: a risky asset (e.g., stock) and a riskless asset (e.g., bond). Therefore, the firm's wealth follows a stochastic process. When the wealth is lower than certain legal level, the firm goes bankrupt. Thus how to invest is the fundamental problem of the firm in order to avoid bankruptcy. Under the case of different lending and borrowing rates, we obtain the optimal portfolio strategies for some reasonable objective functions that are the piecewise linear functions of the firm's current wealth and present some interesting proofs for the conclusions. The optimal policies are easy to be operated for any relevant investor.

• 공학교육연구
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• 제8권4호
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• pp.64-71
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• 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.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2013년도 춘계학술대회
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• pp.301-303
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• 2013

IMO는 선박의 안전항해와 해양환경보호를 위해 e-Navigation의 개념을 채택하였고 이를 위한 구체적인 전략이행계획(SIP, Strategic Implementation Plan)작업을 수행하고 있다. IALA는 IMO의 NAV의 e-Navigation 실행계획을 완성하기 위해 7개의 작업반(WG)을 운용하고 있다. e-Navigation의 개념을 구현하기 위해서는 첨단 IT 전자장비의 개발도 필요하지만 이러한 장비를 이용하여 항해안전을 향상시킬 수 있는 다양한 IT 서비스, 즉 MSP(Maritime Service Portfolio)가 필요하다. 모든 선박에서 MSP을 이용하기 위하여서는 MSP의 구조와 데이터가 표준화되어야 한다. 또한 항해안전에 효과적인가를 검증할 수 있는 방법이 제시되어야 하며, MSP가 남용되지 않도록 관리되어야 한다. 본 연구에서는 선박의 사고사례와 기존 항해통신시스템과 e-Navigation SIP의 갭 목록, 갭 분석 및 갭 해결책을 활용하여 선박의 안전과 보안에 입각한 MSP 구조에 대해서 고찰해 본다.