• The Journal of Society for e-Business Studies
• /
• v.12 no.4
• /
• pp.185-209
• /
• 2007

The development of information technologies has contributed on-line training as one of important education methods. On-line training in firms, which is similar to e-learning or virtual education, provides trainees with more education opportunities in diverse ways. It has developed a range of innovative services with a one-stop solution of education within the electronic sector. Also under the on-line training environment, trainees can undertake customized training packages at anytime and any places. Moreover, information technology allows both the trainers and other trainees to be decoupled in any of the elements of tune, place, and space. Two research questions are investigated : what are the determinants affecting the on-line training effectiveness and how those variables affect the two aspects of training effectiveness: learning performance and transfer performance. Based on the previous literature conducted on the traditional training environment, the determinants of training effectiveness are derived. Eight hypotheses are developed based on literature reviews and tested by questionnaires survey data. The collected data have been analyzed by LISREL. It is found that the relationship between individual, organizational and on-line site design variables and training effectiveness (learning and transfer) are significant. The contribution and limitations of this research are also discussed with future studies.

• Journal of the Korea Convergence Society
• /
• v.9 no.5
• /
• pp.7-14
• /
• 2018

The purpose of this study is to analyze the effect of commuter's departure time on transportation system in future traffic system operated autonomous vehicle using agent based model. Various scenarios have been set up, such as when all passenger choose a similar departure time, or if the passenger chooses a different departure time. Also, this study tried to analyze the effect of road capacity. It was found that although many of the scenarios had been completed in a stable manner, many commuters were significantly coordinated at the desired departure time. In particular, in the case of a reduction in road capacity or in certain scenarios, it has been shown that, despite excessive schedule adjustments, many passengers are unable to commute before 9 o'clock. As a result, it is suggested that traffic management and pricing policies are different from current ones in the era of autonomous car operation.

• Environmental and Resource Economics Review
• /
• v.24 no.1
• /
• pp.225-249
• /
• 2015

There are growing interests in the introduction of consumer's selective electricity tariff systems in order to enhance demand response in electricity market in Korea. Real time pricing (RTP) and Time of Use (TOU) are typical examples of demand response system through which electricity price is linked to real time demand. This paper adopts an agent-based model to analyze the effects of such demand system on the counsumers' electricity costs. The result shows that real time pricing system is effective to reduce electricity costs of consumers by providing more flexible tariff system, depending on each consumer's demand pattern. This finding could be used as a basis for supporting smart grid system in the presence of responsive demand environment.

• Environmental and Resource Economics Review
• /
• v.20 no.2
• /
• pp.381-398
• /
• 2011

Recently, electricity peaks have frequently occurred in winter, and the concerns about failure in power supply are soaring. One of reasons is due to the increase in industrial demand with economic recovery, and the increases in household and commercial demand with unusual cold waves are spotted as a primary cause. Especially, the diffusion of electricity heat pumps (EHP) has led to the rapid increase in commercial electricity demand. The EHP diffusion is mainly associated with low electricity tariff and cheaper heating and cooling costs compared to those of gas-engine heat pumps (GHP). The problem is that distorted electricity tariff and herd behaviour toward heating and cooling devices could bring about nation-wide inefficiencies in resource allocation. The key countermeasures are as follows. The electricity tariff should be readjusted to a realistic level. The tariff scheme should be so modified that consumers rationally respond to the tariff. In addition, one should find ways to effectively manage electricity demand.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.23 no.12
• /
• pp.201-209
• /
• 2009

In power plant operations, sensor values often exhibit erroneous values due to their failures or the intrusions of various noises. However, most of the power plant monitoring and fault diagnosis systems perform their tasks based on the assumptions that the collected sensor values are correct all the times. These assumptions, which are not valid, often lead to serious consequences such as power plant trips. In this paper, we propose a power plant sensor value validation technique that can utilize the relationships existing among the sensor values as the sensor redundancy. The proposed technique is applied to the flow meters installed along boiler feed water systems of a typical tubular type boiler thermal power plant and shows a good potential of future applications.

• 한국벤처창업학회:학술대회논문집
• /
• 2019.04a
• /
• pp.175-179
• /
• 2019

1년에도 수십 수백 개씩 스타트업이 생겨나고 있다. 아마도 모두 미래의 구글과 페이스북, 그리고 아마존이 되길 희망하며 하루하루 가열차게 달리고 있다. 하지만 그 많은 스타트업 중 소위 성공했다 불릴 수 있는 기업은 손에 꼽는다. 능력 있는 창업가, 기발한 사업 모델과 아이디어 그리고 이를 뒷받침해 줄 기술력과 자본이 있다고 성공할 수 없다. 스타트업 기업을 굴러가게 하는 힘은 결국 그 조직의 구성원에게서 나오기에 성공한 스타트업에겐 모두 그들 만의 '조직문화'가 있다. 그게 모두에게 좋은 문화일 필요는 없을 것이다. 그 조직에 가장 접합한, 그래서 구성원의 구성원의 공감대를 사 '일하고 싶은 회사'가 될 수 있게 하는 '조직 문화'가 있는 스타트업이 수많은 인재를 모아 성장을 거듭해 올 수 있었고 그것이 결국 스타트업을 성공으로 이끌었던 것이다. 이런 조직 문화는 회사 초창기에 세팅할수록 해당 기업의 성공 확률도 높아진다. 7년 미만의 초기 스타트업 기업을 대상으로 조직문화 유형이 스타트업 구성원의 조직 몰입과 조직성과에 어떠한 영향을 주는지에 대한 실증분석을 목적으로 하였다. 초기 스타트업 기업의 조직문화 차원은 경쟁가치모형의 혁신문화와 위계문화로 구분하였으며, 조직성과는 스타트업의 서비스, 제품을 경험한 이용자들의 서비스 만족도를 활용하였다. 조직문화는 외부환경에 대한 적응과 조직내부 통합의 문제를 해결하기 위하여 구성원들에 의해 창조 발전되어 학습되는 기본가정으로서 스타트업 구성원들에 의해 공유된 가치(values), 신념(beliefs), 규범(norms)의 체계로 정의한다. 따라서 어떠한 조직문화를 갖는냐에 따라 조직 구성원의 몰입, 충성심, 직무동기, 직무성과는 물론 조직성과와 혁신을 포함하는 여러 조직 요인도 직 갑적인 영향을 받는다. 7년 미만의 초기 스타트업 혁신문화가 스타트업 구성원의 조직몰입에 긍정적인 영향을 미치며, 조직몰입이 스타트업 서비스, 제품을 경험한 이용자들의 서비스 만족도에도 긍정적인 효과가 있는 것으로 나타났다.

• Knowledge Management Research
• /
• v.22 no.1
• /
• pp.139-154
• /
• 2021

As environmental impacts on business management rapidly rise, the importance of resilience has been emphasized ever. Resilience can be defined as the capability to quickly return to daily operational levels after external shocks. Thus, we suggest and empirically verify a conceptual model using enterprise-level resilience in knowledge management. Based on previous studies, sub-components of resilience have been distinguished into R4(i.e., Robustness, Redundancy, Resourcefulness, and Rapidity) and the internal and external knowledge management activities of companies have been identified as prior factors. Considering resilience as mediating variables, firms' knowledge management activities are assumed to affect a firms' performance. We collected data with the structured survey which had been developed from the stepwise approach to verify the structural model that leads to knowledge management activities, resilience, and performance. In further research, we request exploratory research on independent variables that can increase the firms' resilience and on dependent variables that would be influenced by the enterprise-level resilience.

• Journal of Korean Society of Disaster and Security
• /
• v.15 no.2
• /
• pp.45-56
• /
• 2022

The countermeasure for the shortage of water during dry season and drought period has not been considered with return flowrate in detail. In this study, the outflow of STP was predicted through a data-based machine learning model, LSTM. As the first step, outflow, inflow, precipitation and water elevation were utilized as input data, and the distribution of variance was additionally considered to improve the accuracy of the prediction. When considering the variability of the outflow data, the residual between the observed value and the distribution was assumed to be in the form of a complex trigonometric function and presented in the form of the optimal distribution of the outflow along with the theoretical probability distribution. It was apparently found that the degree of error was reduced when compared to the case not considering where the variance distribution. Therefore, it is expected that the outflow prediction model constructed in this study can be used as basic data for establishing an efficient river management system as more accurate prediction is possible.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2020.06a
• /
• pp.281-281
• /
• 2020

이 연구는 농업가뭄이 빈번하게 발생하는 대표적인 국내 농어촌지역에 대하여, 토지이용변화와 잠재증발산량 분석을 통해 관개용수 수요량을 추정하여, 가뭄 수요대응 상시 용수공급체계를 수립하고자 수행되었다. 연구지역은 총 1,164필지(면적 약 289 ha)로 구성되며, 지하수 공공관정에 대한 의존도가 높은(53%) 편이다. 농경지는 537필지(약 46 ha)이며 총면적(약 289 ha)의 약 16% 이고, 논이 약 11%(약 33 ha), 밭이 약 5%(약 13 ha)에 해당한다. 최근 10년(2010-2019년)간 농작물 재배면적을 살펴보면 논벼가 전체 농경지(46 ha)의 65-75%(약 32-33 ha)로 가장 넓다. 논벼를 제외하면, 깨(9-12%; 4-6 ha), 고추(3-9%; 2-5 ha), 고추/깨 윤작(2%; <1 ha), 수수(2-3%; 1 ha) 등이 나머지 면적에서 생산되며, 최근 들어 단호박, 마늘, 살구, 파, 표고버석, 호박 등 재배작물의 종류가 다양해지는 편이다. 작물별 실제 관개용수 수요량을 산정하기 위해 최근 10년간(2010-2019) 작물별 재배면적 변화, 재배기간, 작물계수, 잠재증발산량 등의 자료를 수집하여 분석하였다. 논에 대한 관개용수 수요량의 경우 논(297필지) 면적변화를 기반으로 HOMWRS 프로그램을 이용하여 산정하였다. 밭에 대한 관개용수 수요량은 밭(240개 필지)의 재배작물에 대하여 작물별 증발산량이 밭작물의 관개용수 수요량과 동일하다는 가정 하에 산정하였다. 이 결과, 최근 10년간(2010-2019) 연구지역 관개용수 수요량은 평균 377천 ㎥/년으로 추정되었다. 논은 밭에 비해 약 6배 관개용수 수요량이 많았고, 상세하게는, 논의 관개용수 수요량은 평균 321천 ㎥/년이었고, 반면 밭의 관개용수 수요량은 평균 56천 ㎥/년으로 산정되었다. 밭용수의 경우, 2010년 이래로 농가소득 증대를 위해 밭작물 재배면적이 증가하면서 밭의 용수 수요량은 해마다 증가추세(40~88천 ㎥/년)를 보였다.

• Journal of Korean Home Economics Education Association
• /
• v.15 no.3
• /
• pp.13-28
• /
• 2003

This study presents a development of internet-based consumer education program for children. We also investigate how this program affects on the children's consumer competency and how much children are interested in this program. This program consists of 6 domains: the concept of consumer. wants and scarcity. advertisement, tips on purchasing. consumer's rights. and consumer's problem imd solutions. In order to attract children. multimedia data such as pictures. drawings. and animations were included in designing the screens. The subjects of this study were 40 children at forth grade to participate in consumer education program. Surveys were conducted twice to collect data for consumer competency and children's interest in the program. According to the results of t-test. We found that consumer education has a positive effect on consumer knowledge and consumer-role attitude but has not a positive effect on consumer skill. We also found that children's interest on this program was very high.