• 한국수학교육학회지시리즈D:수학교육연구
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• 제1권2호
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• pp.107-116
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• 1997

The purpose of this study is to develop a teaching/learning model for the mathematical enculturation of elementary and secondary school students. It is clear that the development of teaching and learning in the classroom is essential for the realization of global innovations in mathematics education. Research questions for this purpose are as follow: (1) What can be learned from literatures reviews of the socio-cultural perspective on mathematics education, and of ethnomathematics as a mathematics intrinsic to cultural activities? (2) What is the direction of teaching and learning from the perspective of mathematical enculturation? (3) What is the teaching /learning model for mathematical enculturation? (4) What is the instructional exemplification based on the developed model? This study promotes the establishment of mathematics education theory from the review of literatures on the socio-cultural perspective, the development of a teaching/learning model, and the instructional exemplification based on the developed model.

• 대한가정학회지
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• 제49권7호
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• pp.67-80
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• 2011

This study investigated a path model in which men's and women's communication behavior escalating marital conflict (CBEMC) may be influenced directly and indirectly, via negative interpretations of their spouse, by their spouse's problem behavior, the couple's turning toward bids, and dyadic perspective-taking. Self-report data were collected from 498 married men and women who were living in Busan, Korea. Multiple-group analysis revealed that the path model was not equivalent for men and women. Their couple's turning toward bids and dyadic perspective-taking for men, and their spouse's problem behavior and dyadic perspective-taking for women, had direct effects on CBEMC. Further, their spouse's problem behavior and the couple's turning toward bids had indirect effects on CBEMC through negative interpretations in both men and women. The indirect effect of dyadic perspective-taking on CBEMC was significant only for men. Finally, considering total effects, dyadic perspective-taking was the strongest predictor of CBEMC for both genders.

• 동아시아경상학회지
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• 제10권4호
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• pp.39-45
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• 2022

Purpose - This short paper reviews the debate dealing with the relationship between strategy and traditional strategy approach on the one hand, and business models and new business model approach on the other hand and tries to offer useful direction to be more helpful to theoretical discussions. Research design, data, and methodology - This paper makes a theoretical analysis to explain the confusion surrounding the debate, reviewing mainly literature survey papers and finds theoretical conjecture and its limitations in order to present useful direction to the future theoretical work. Result - In order to comprise its diversity, business model studies should consider the characteristics of each firm, sector, and market. Adding further elements which are related to each sector or market, theoretical studies can capture the diverse phenomena related to business model and business model innovation. Conclusion - The traditional strategy perspective can be utilized to the Business model phenomenon in the case of incumbent firms and non-digital sector and existing markets. Meanwhile the new business model perspective can be utilized to business model phenomena in case of start-ups and digital sector and emerging markets. Reconciling two perspectives, the studies dealing with the business model should focus on the characteristics of firms, markets, and knowledge from the perspective of business model innovation.

• 한국IT서비스학회지
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• 제19권4호
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• pp.49-61
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• 2020

Prior studies on technology predictions attempted to predict the emergence and spread of emerging technologies through the analysis of correlations and changes between data using objective data such as patents and research papers. Most of the previous studies predicted future technologies only from the viewpoint of technology development. Therefore, this study intends to conduct technical forecasting from the perspective of the consumer by using keyword search frequency of search portals such as NAVER before and after the introduction of emerging technologies. In this study, we analyzed healthcare technologies into three types : measurement technology, platform technology, and remote service technology. And for the keyword analysis on the healthcare, we converted the classification of technology perspective into the keyword classification of consumer perspective. (Blood pressure and blood sugar, healthcare diagnosis, appointment and prescription, and remote diagnosis and prescription) Naver Trend is used to analyze keyword trends from a consumer perspective. We also used the ARIMA model as a technology prediction model. Analyzing the search frequency (Naver trend) over 44 months, the final ARIMA models that can predict three types of healthcare technology keyword trends were estimated as "ARIMA (1,2,1) (1,0,0)", "ARIMA (0,1,0) (1,0,0)", "ARIMA (1,1,0) (0,0,0)". In addition, it was confirmed that the values predicted by the time series prediction model and the actual values for 44 months were moving in almost similar patterns in all intervals. Therefore, we can confirm that this time series prediction model for healthcare technology is very suitable.

• 대한원격탐사학회지
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• 제18권4호
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• pp.233-242
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• 2002

본 논문에서는 위성 궤도 정보를 사용하지 않는 새로운 에피폴라 기하모델을 제안하고, 선형 Pushbroom 영상의 에피폴라 기하모델을 위한 방법들과 정량적으로 비교 분석을 한다. 정량적 분석에 사용된 에피폴라 기하모델은 항공영상에 적용되는 중심투영(Perspective) 센서의 에피폴라 기하모델, Gupta와 Hartley의 에피폴라 기하모델, 궤도정보를 사용하는 Orun과 Natarajan 센서모델의 에피폴라 기하모델이다. 대전과 보령의 SPOT 영상과 대전과 논산의 KOMPSAT 영상에 대해 지상기준점, 지상기준점에서 생성한 모델링데이터, 위성 궤도정보 및 숙련된 운영자가 추출한 독립검사점을 사용하여 실험을 수행하였다. 실험 결과에 따르면 중심투영 센서의 에피폴라 기하모델과 Gupta와 Hartley의 에피폴라 기하모델은 평균적으로 1픽셀 이내의 정확도를 보였으나 일부 검사점에서 높은 오차를 보였다. 제안한 에피폴라 기하모델은 중심투영 센서나 Gupta와 Hartley의 에피폴라 기하모델보다 정확도가 높고, 궤도 정보를 사용하는 Orun과 Natarajan 센서 모델의 에피폴라 기하모델과 유사한 정확도를 보였다.

• 로봇학회논문지
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• 제18권1호
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• pp.59-65
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• 2023

This paper proposes an Extended and Adaptive Inverse Perspective Mapping (EA-IPM) model that can obtain an accurate bird's-eye view (BEV) from the forward-looking monocular camera on the sidewalk with various curves. While Inverse Perspective Mapping (IPM) is a good way to obtain ground information, conventional methods assume a fixed relationship between the camera and the ground. Due to the nature of the driving environment of the mobile robot, there are more walking environments with frequent motion changes than flat roads, which have a fatal effect on IPM results. Therefore, we have developed an extended IPM process to be applicable in IPM on sidewalks by adding a formula for complementary Y-derive processes and roll motions to the existing adaptive IPM model that is robust to pitch motions. To convince the performance of the proposed method, we evaluated our results on both synthetic and real road and sidewalk datasets.

• 한국정보시스템학회지:정보시스템연구
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• 제13권2호
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• pp.173-193
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• 2004

B2C EC has two kinds of perspectives such as technology-oriented and trust-oriented perspectives. As lots of fraud damages on the B2C EC have been reported every day, the trust-oriented perspective receives lots of attention. In this study, an integrative typology for developing and validating trust measures for B2C EC proposed by McKnight et al.(2002a) and McKnight and Chevany(2002b) has been used for trust-oriented perspective, and the TAM(technology acceptance model) model proposed by Fred Davis in 1985 has been used for technology-oriented perspective. An research model had been developed by using the 4 factors of an integrative typology and 5 factors of the TAM model such as perceived usefulness, perceived ease of use, trust beliefs, intention, and actual transaction. All 13 hypotheses had been proposed from this research model and tested by field study. 12 hypotheses, including the 4 f actors of an integrative typology as antecedents on trust beliefs, were significant, whereas the hypothesis 5 on the relationship between structural assurance and perceived ease of use was insignificant. Structures on B2C EC like guarantees, regulations, promises, legal recourse, or other procedures seemed to be difficult to B2C EC customers. Therefore, these structures should be developed more easier to B2C EC customers.

• 가정과삶의질연구
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• 제30권4호
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• pp.147-161
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• 2012

Remarriage has been prevalent in Korea since the mid-1990s. Remarried families have reported that they face many challenges and difficulties. Life for those who remarry can worsen when the children from a previous marriage live together with new family members. It is interesting that some remarried families adjust well while others do not. This study focuses on developing a practice model for strengthening the resilience of remarried families with children based on a literature review. To understand and support remarried families, the resilience perspective was chosen, focusing on a strengths perspective with developmental, ecological, and preventative perspectives. In terms of resilience, the proposed practice model was developed on the basis of three concepts: belief systems, organizational patterns, and communication. The model can be used to help remarried families accomplish adequate integration by growing as a new family and can prevent another divorce. Moreover, it can assist practitioners and policy-makers develop programs and policies with a strengths perspective rather than a deficit or problem-oriented perspective. Based on the model, various programs need to be developed to strengthen the resilience of remarried families. The development of supportive programs is suggested. These can include remarriage preparation programs, remarriage life education programs, interactive web-based programs, and family camps. For a long time, remarried families have been labeled as abnormal and atypical owing to the normal family myth. This negative perception of remarried families must be altered so that they are accepted with a positive outlook in a society. For further studies, the development of diverse supportive adaptation programs for various types of remarried families and active research on them are recommended. The practice model can assist with the adaptation and growth of remarried families by strengthening their resilience.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권5호
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• pp.2186-2203
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• 2020

Security administrators of companies and organizations need to come up with proper countermeasures against cyber-attacks considering infrastructures and security policies in their possession. In order to develop and verify such countermeasures, the administrators should be able to reenact both cyber-attacks and defenses. Simulations can be useful for the reenactment by overcoming its limitations including high risk and cost. If the administrators are able to design various scenarios of cyber-attacks and to develop simulation models from their viewpoints, they can simulate desired situations and observe the results more easily. It is challenging to simulate cyber-security issues, because there is lack of theoretical basis for modeling a wide range of the security field as well as pre-defined basic components used to model cyber-attacks. In this paper, we propose a modeling method for cyber-security simulations by developing a basic component and a composite model, called Abstracted Cyber-Security Unit Model (ACSUM) and Abstracted Cyber-security SIMulation model (ACSIM), respectively. The proposed models are based on DEVS(Discrete Event systems Specification) formalism, a modeling theory for discrete event simulations. We develop attack scenarios by sequencing attack behaviors using ACSUMs and then model ACSIMs by combining and abstracting the ACSUMs from a security perspective. The concepts of ACSUM and ACSIM enable the security administrators to simulate numerous cyber-security issues from their viewpoints. As a case study, we model a worm scenario using ACSUM and simulate three types of simulation models based on ACSIM from a different security perspective.

• 한국도서관정보학회지
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• 제40권1호
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• pp.47-71
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• 2009

공공도서관의 사명은 정보이용, 문화활동, 평생교육 등과 관련된 지역주민의 요구를 충족시키고 보다 편리하고 평등한 접근을 제공함으로써 지역사회 발전과 지역주민의 삶의 질을 향상시키는데 있다. 본 연구는 이러한 공공도서관의 사명을 달성하고 성과를 제고할 수 있는 성과지표 모형을 개발하고자 학습 및 성장 관점, 내부 프로세스 관점, 자원 관점, 이용자 관점의 4가지 관점 아래 12개의 주요성공요인, 36개의 핵심성과지표로 구성된 BSC 기반 공공도서관 성과지표 모형을 도출하고, 공공도서관 사서를 대상으로 도출된 성과지표 모형의 상대적 가중치를 산정하여 공공도서관의 사명달성과 성과제고에 어떠한 성과지표가 중요한지를 분석한 연구이다.