• Journal of the Korean Society for Railway
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• v.14 no.5
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• pp.470-476
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• 2011

This study proposed the intervention ARIMA model as a way to forecast the KTX passenger demand. The second phase of the Gyeongbu high-speed rail project and the financial crisis in 2008 were analyzed in order to determine the effect of time series on the opening of a new line and economic impact. As a result, the financial crisis showed that there is no statistically significant impact, but the second phase of the Gyeongbu high-speed rail project showed that the weekday trips increased about 17,000 trips/day and the weekend trips increased about 26,000 trips/day. This study is meaningful in that the intervention explained the phenomena affecting the time series of KTX trip and analyzed the impact on intervention of time series quantitatively. The developed model can be used to forecast the outline of the overall KTX demand and to validate the KTX O/D forecasting demand.

• 한국HCI학회:학술대회논문집
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• 2007.02a
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• pp.235-242
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• 2007

로봇의 활동 영역이 산업 현장에서 인간의 일상 생활 공간으로 확장됨에 따라서, 로봇은 사용자가 사용하는 성능 좋은 도구 개념에서 벗어나 일상 생활을 공유하며 살아가는 파트너로 생각되기 시작했다. 이에 따라서 미리 정해진 명령과 조작 방법을 통한 단순한 상호작용만이 일어나던 과거와 달리, 사용자는 마치 사람을 대하듯 자연스럽게 로봇과 상호작용하기를 기대하게 되었다. 사람들은 본래 context를 활용하여 모호한 표현을 하더라도 상호작용이 가능하기 때문에, 사용자의 발화가 자유롭게 이루어지면 로봇이 처한 상황적 모호성은 가중될 수 밖에 없다. 이러한 문제에 직면하여, 스크립트 기반의 인간-로봇 상호작용을 통한 문제 해결 노력이 그 돌파구가 될 것으로 기대된다. 본 논문은 이러한 노력의 일환으로, 태스크 수행중인 로봇에 자유롭게 사용자가 개입하는 상황을 처리하는 방안을 제시하고자 한다. 사용자가 개입하는 상황을 어떻게 이해할 것이며, 로봇은 어떤 전략으로 이에 대처해야 하는지 분석한 뒤, 사용자 개입에 대한 구체적인 처리 프로세스를 제시한다. 그리고 제시된 프로세스를 구현해 봄으로써 그 효용성을 검증한다.

• Journal of Labour Economics
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• v.31 no.1
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• pp.105-133
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• 2008

Focusing market failure and state intervention, this article analyzes the determinants of corporate training in Korea. Analysing the first wave of HCCP(Human Capital Corporate Panel) data produced by KRIVET(Korea Research Institute for Vocational Education and Training), this article finds that even though the skills attainead in corporate in Korea are mostly general(industry-specific), but the market failure in training appears rather small and is confined to the manufacturing industry. And the state intervention in corporate training works only at manufacturing industry, it does not work at new service industry. The results mean that in new service industry, it is difficult to find out the existence of market failure in training due to the positive externalities. Therefore Korea government should look thoroughly into the state intervention in training in new service industry.

• Journal of the Korean Data and Information Science Society
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• v.25 no.1
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• pp.65-76
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• 2014

Housing prices are influenced by external shock factors such as real estate policy or economy. Thus, the intervention effect is important for the development of forecasting model for housing price index. In this paper, we examined the degree of effective power of external shock factors for forecasting housing price index and analyzed time series models for efficient forecasting of housing price index. It is shown that intervention models are better than other models in forecasting results using real data based on the accuracy criteria.

• The Korean Journal of Applied Statistics
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• v.30 no.5
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• pp.719-731
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• 2017

In September 2010, the Korea government increased the speed limit on the Gyeongbu Expressway (Cheonan IC.-Yangjae IC) from 100 to 110 km per hour. This paper considers ARIMA-Intervention model to analyze the effects of the speed limit change on the incidences of traffic accidents and injuries. In addition, in order to investigate the effects more clearly, we also analyze the difference between the two lines of Cheonan IC-Yangjae IC and Busan IC-Cheonan IC. As a result, we observe that the numbers of accidents and injuries have increased after the speed limit change. The increases are strikingly distinctive in comparison to other lines (Busan IC-Cheonan IC) where there have been no changes in the maximum speed limit.

• Korean Journal of Social Welfare
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• v.53
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• pp.231-255
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• 2003

The purpose of this study was to determine the effectiveness of social work intervention for the family caregivers of the older persons with stroke. Twelve caregivers were assigned to either a treatment group or a control group. The treatment group intervention consisted of 8 weekly, 2-hour sessions which included education, peer and professional support, individual counselling. Wilcoxon test of the pretest and posttest scores of the two groups showed that those in the treatment program experienced significant decrease in caregiving burden and loneliness compared with caregivers who received no intervention. They also experienced increase in self-esteem, self-efficacy in dealing with caregiving tasks, satisfaction with a relationship with the care-receiver, emotional support. Most of these intervention effects were maintained in the 3-month follow-up measurement except loneliness and the caregiver-carereceiver relationship. Caregivers in the treatment group showed overall satisfaction with the program and willingness to continue to attend in the interventions. Based on these findings, implications for social work practice including self-help groups, psychotherapy for the caregivers, expanding social work intervention for the family caregivers of the older persons were discussed.

• Proceedings of the Military Operations Research Society of Korea Conference
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• 2001.03a
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• pp.14-44
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• 2001

• The Journal of Korean Association of Computer Education
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• v.16 no.4
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• pp.23-31
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• 2013

The purpose of this study is to examine if educational programs to intervene with smartphone addiction developed for elementary school students are effective in reducing their smartphone overuse that has been rapidly increasing nowadays. To attain the goal, the study analyzes internet addiction intervention programs previously developed with the cognitive behavior therapy of which effectiveness has been verified in psychotherapy for those showing addiction, and based on that, it develops and applies educational programs to intervene with smartphone addiction. The conclusions the paper has drawn are as follows: First, educational programs to intervene with smartphone addiction are effective in reducing the tendencies of smartphone addiction of those students using smartphones too much for their irrational thinking or habitual behavior. Second, educational programs to intervene with smartphone addiction will facilitate behavioral changes regarding negative factors of smartphone addiction such as maladaptation in everyday life or tolerance and also help the reconstruction of elementary school students' positive cognition on smartphone use.

• The Korean Journal of Applied Statistics
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• v.32 no.1
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• pp.139-148
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• 2019

This study proposed a multiple intervention time series model to predict KTX passenger demand. In order to revise the research of Kim and Kim (Korean Society for Railway, 14, 470-476, 2011) considering only the intervention of the second phase of Gyeong-bu before November of 2011, we adopted multiple intervention seasonal ARIMA models to model the time series data with additional interventions which occurred after November of 2011. Through the data analysis, it was confirmed that the effects of various interventions such as Gyeong-bu and Ho-nam 2 phase, outbreak of MERS and national holidays, which affected the KTX transportation demand, are successfully explained and the prediction accuracy could be quite improved significantly.

• Korean Journal of Social Welfare
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• v.51
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• pp.93-118
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• 2002

The objective of this study was to determine the effect of a psycho-educational group intervention in reducing psychologic distress and enhancing coping in Korean breast cancer patients. The patient selection criteria were age younger than 70 years, having any postoperative adjuvant therapy, and surgery undergone within the previous 12 months as of the start of the study and there were 70 patients eligible for this criteria. They were randomized into three groups; experimental group(24 patients), wait-list control group(24 patients) and wait-list group(36 patients). We conducted a 8-week, structured, psychosocial group intervention, which used psycho-educational strategies combining education and psychological support. Subjects were assessed for psychological distress and coping by administering the Beck Depression Inventory(BDI) and the Ways of Coping Checklist-Revised(WCCL-R) at the baseline and after 8 weeks. Forty eight patients were participated and thirty five patients completed the study. The experimental group had significantly lower scores than the controls for depression on the BDI(p=.012) after 8-week intervention. However, coping did not show a significant difference on WCCL-R after the intervention. Despite of some limitations, the results of this study suggest that a short term psychosocial group intervention produces a significant improvement in the quality of life of patients with primary breast carcinoma in Korea in terms of managing depression.