• 한국수학교육학회지시리즈C:초등수학교육
• /
• 제6권1호
• /
• pp.29-40
• /
• 2002

Fairy-tales give students opportunities to build connections between a problem-solving situation and mathematics as well as to communicate solutions through writing, symbols, and diagrams. Therefore, the purpose of this paper is to introduce how to use fairy-tales in elementary mathematics classroom in order to develope student's mathematical concepts and process in terms of the following areas: ⑴ reconstructing literature ⑵ understanding concepts ⑶ problem posing activity. To be useful, mathematics should be taught in contexts that are meaningful and relevant to learners. Therefore using fairy-tales as a vehicle to teach mathematics gives students a chance to develope mathematics understanding in a natural, meaningful way, and to enhance problem posing and problem solving ability. Further, future study will continue to foster how fairy-tales literatures will enhance children's mathematics knowledge and influence on their mathematics performance.

• 한국지진공학회:학술대회논문집
• /
• 한국지진공학회 2006년도 학술발표회 논문집
• /
• pp.358-365
• /
• 2006

In this study, fragility curves of continuous buried pipelines subjected to transverse PGD (permanent ground deformation) due to liquefaction are proposed. For the waterworks system, continuos buried pipelines made of ductile iron, poly ethylene, and poly vinyl chloride are analyzed and fragility curves are drawn. Fragility curves are based on the repetitive analyses results and formulated with the dominant factors of behaviour of buried pipeline. With the use of fragility curves, engineers can estimate the status of damage of buried pipeline without overall knowledge of relevant features. Especially, fragility curves proposed in this study will act as a major module of earthquake loss estimation method. Moreover, critical value of magnitude and width of transverse PGD (by which the full damage status of buried pipelines are induced) are estimated. With the use of regression curves of these values, pre evaluation of seismic safety of buried pipelines located within liquefaction hazardous region will be possible.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제13권4호
• /
• pp.2198-2222
• /
• 2019

The cloud storage service becomes a rising trend based on the cloud computing, which promotes the remote data integrity auditing a hot topic. Some research can audit the integrity and correctness of user data and solve the problem of user privacy leakage. However, these schemes cannot use fewer data blocks to achieve better auditing results. In this paper, we figure out that the random sampling used in most auditing schemes is not well apply to the problem of cloud service provider (CSP) deleting the data that users rarely use, and we adopt the probability proportionate to size sampling (PPS) to handle such situation. A new scheme named improving audit efficiency of remote data for cloud storage is designed. The proposed scheme supports the public auditing with fewer data blocks and constrains the server's malicious behavior to extend the auditing cycle. Compared with the relevant schemes, the experimental results show that the proposed scheme is more effective.

• International Journal of Internet, Broadcasting and Communication
• /
• 제11권1호
• /
• pp.8-16
• /
• 2019

As smartphone users grow, mobile operators are trying to standardize and commercialize Rich Communication Suite (RCS), which is a next-generation messaging service, so that it can replace legacy messaging services. However, it is not enough to spread RCS widely to the users only by publishing an RCS app. To increase the use of RCS, a web-based open API for common RCS capabilities is needed. By using the API, Internet-based developers can create applications that make use of the RCS capabilities with less effort and time. This paper proposes a lightweight Comet-based open API to allow mobile operators to expose useful information and capabilities to application developers. The system architecture of the open API framework and call flow between relevant nodes are defined. In addition, examples of protocol translations on the framework are provided.

• 지식경영연구
• /
• 제19권4호
• /
• pp.99-118
• /
• 2018

Recently, individuals are interested in a variety of products and services based on artificial intelligence. Among those products and services, an intelligent personal assistants are attracting many attention from IT companies as a next generation platform. Thus, the main purpose of this study is to investigate effects of intelligent personal assistant's benefits on user's value formation and adoption behavior based on Value-based Adoption Model. In addition, the moderating effect of personal innovativeness is examined through empirical analysis. Based on the analysis with the data from actual users, the results show that usefulness, enjoyment, technicality and cost advantage have significant influences on perceived value and correspondingly have an effect on intention to adopt. Personal innovativeness is related to the relationship between perceived value and intention to adopt. These findings may provide important insights to the relevant field regarding the use and spread of intelligent personal assistants.

• 융합보안논문지
• /
• 제18권2호
• /
• pp.25-32
• /
• 2018

스마트폰 사용이 보편화되면서 자연스럽게 서로간의 소통이 메신저를 통하여 이뤄지게 되었다. 하지만 서로간의 대화공간이 범죄를 공모하는 공간으로도 활용되고 있는 실정이다. 이에 따른 범죄와 관련된 증거들이 스마트폰에 저장된다. 스마트폰의 특성상 저장정보의 삭제를 손쉽게 할 수 있기 때문에 증거를 신속히 확보 하는 것이 중요하다. 따라서 본 논문에서는 국 내외에서 대표적으로 사용 중인 모바일 메신저에 대하여 데이터 파일의 아키텍처 분석을 수행하였다. 사용자가 메시지 삭제를 위해 이용할 수 있는 방법에 대한 시나리오를 설정하고 실험을 통해 메시지 복원가능 여부에 대하여 비교 분석한다.

• 한국동물생명공학회지
• /
• 제37권1호
• /
• pp.13-16
• /
• 2022

The use of animals heavily impacts the mental health of researchers performing the animal experiments. The animal researchers need to take care of animals but also give pain and sacrifice them at the same time. This circumstance can cause a variety of mental stress to the researchers. The stress generated in the laboratory would not only negatively affect the management of animals and the research results, but also would harm the researchers' physical and mental health. Because the feeling of sympathy for animals is a natural feature of humanity, psychological stress following a laboratory animal's death after use is not surprising. It is necessary to revise the relevant laws based on understanding the difficulties of animal researchers in society and to develop related educational programs at the national level to help the psychology and emotions of researchers who conduct animal experiments.

• Asia pacific journal of information systems
• /
• 제32권1호
• /
• pp.70-91
• /
• 2022

Organizations today depend and thrive on timely, accurate and strategically relevant information. Business analytics (BA) holds the key to many of these issues. This paper validates a model on how the usage of BA leads to operational efficiency. We identified the factors of basic analytical usage from the Business Capacity Maturity Model (BCMM). The scope of the study is restricted to the Information Technology Infrastructure and Application management domain. A survey was conducted among the managers of the IT companies in Bengaluru, India. The results showed a significant influence of data-oriented culture and BA tools and infrastructure on BA usage. We found a significant influence of BA usage and pervasive use on operational efficiency. The speed to insight is still not practised in organizations. The awareness level of analytical skills in organizations is very low.

• 농촌계획
• /
• 제1권2호
• /
• pp.77-92
• /
• 1995

The initiative to determine farmland use has been transferred to local side under the decentralized government system in Korea. New Land Act and Rural Development Act support it. Changes in external and internal environments of Korean agriculture require to diversify farmland use. Lpcal development plan may be implemented when specific farmland use plan is prepared. However, (armland use planning has not been prepared by the local governments yet. This study aims to identify problems encountered in current farmland use and suggest directions of effective and reasonable farmland use planning relevant to local conditions. Questionnaire method was used to prove topographical differences of community land demand, Statistical analyses show that farmers desire to utilize marginal farmland for income increase. Growing grass(42.0%) and cash crops(41.7%) was greatly demanded by them. They were generally eager for developing touristic farm (52.1 % ). By topographical characteristics, the eager was greatest in coastal areas, on the contrary, it was relatively low in mountainous areas. There were more farmers who want to expand their farmland in rice farming(48.4%) or rice-horticulture farming(46.9%) areas. Potential retirer among farmers were most in suburban areas, However, it was expected that there would be the highest retirement rate in rice farming areas because of the high rate of aged farmers. Farmland use planning should be incorporated into food production policies and community people's needs for income increase and life improvement. Agriculture promotion areas must be maintained for scale optimized farming and cash crop farming as much as possible. However, minimum portion for other uses in each village or farming community unit should be adopted. Less favored areas will have to be utilized for both agriculture and non-agriculture uses. Priority can be put into touristic resorts as a non-agriculture use. Furthermore, such areas can be used for sustainable agriculture as well as for residence, industry, animal breeding.

• 한국경제지리학회지
• /
• 제13권4호
• /
• pp.515-528
• /
• 2010

본 연구에서는 전반적으로 토지이용이 조밀하면서도 지역 간 주택가격의 차이가 크게 나타나는 우리나라 서울지역을 대상으로 주택가격에 영향을 미치는 요인을 분석해 보고자 한다. 특히 복합용도개발현황과 TOD 상황을 보여주는 접근성을 고려한 뉴어버니즘의 주요 개념들이 실제 주택가격에 어떠한 영향을 분석한다. 이를 위하여 모든 도시민이 일상생활을 영위하기 위하여 필요로 하는 토지이용을 거주지, 일자리, 쇼핑시설로 보고 지역에 이들의 토지이용이 혼합되어 있는 정도를 측정하는 용도혼합지표를 개발하였다. 특히 동 단위를 근린지역의 범위로 보고, 동별 토지이용의 혼합정도를 측정하는 용도혼합지표를 수도권지역 읍면동 단위의 인구수, 오피스 고용자 수, 상업 고용자수를 이용하여 주성분분석을 적용하였다. 또한 주택가격에 영향을 미치는 교통요인으로 지하철 접근성과 도로교통 접근성을 산출하고, 서울시 동별 복합용도개발지수와 지하철과 도로교통 접근성 변수와 더불어 주택수요, 지역성장율 등 사회경제변수들로 구성된 주택가격모형을 통하여 이들이 해당 동별 아파트 가격에 어떠한 영향을 주는가를 분석하였다. 분석 결과 복합용도개발과 교통이 주택가격에 영향을 준다는 뉴어바니즘의 개념이 확인되었다.