• Convergence Security Journal
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• v.23 no.5
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• pp.231-238
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• 2023

The purpose of this paper is to determine the extent to which job satisfaction affects organization commitment and organization performance among industrial security personnel. To this end, we attempted to conduct a four-week survey from August 28 to September 22, 2023, targeting about 150 workers working as industrial security guards in the field. According to the survey, the variables were comprised of "first, job satisfaction, second, organization commitment and third, organization performance" and based on this, three research hypotheses were proposed. After confirming that the internal consistency of each measurement item was satisfied, discriminant validity and conceptual reliability were calculated, and the discriminant validity of each variable was verified. As a result of the analysis, after conducting regression analysis to verify the research model, the results show that among the three research hypotheses, "Job Satisfaction ⇨ Organization Commitment, Job Satisfaction ⇨ Organization Performance" was found to be statistically significant and was adopted. We calculated that "Organization Commitment ⇨ Organization Performance" was not significant and was rejected.

• Environmental and Resource Economics Review
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• v.23 no.1
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• pp.133-156
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• 2014

In general, quantity results of empirical analysis using model shows how much big performance policy has. Therefore this is useful to evaluate a policy. This paper composed macro economic model based on Bank of Korea's quarterly model and annual model, that estimates performance of overseas oil and gas development project to Korean economy in aspect of quantity. In this model, we estimated each effect in real GDP, current account, unemployment rate, CPI and exchange rate carried by recovered amount from overseas oil and gas development project. The recovered amount was evaluated in currency coming from oil and gas acquired from overseas oil and gas development project. Macro economic model of this paper benchmarked macro model composed by Bank of Korea(1997, 2004, 2012). We reviewed model robustness using statistical suitability of each equation and historical simulation for from 1994 to 2011. The recovered amount of overseas oil and gas development project has positive effect in every macro economic index except CPI and exchange rate. Economic effect to macro economic index become bigger with time because the recovered amount of overseas oil and gas development project are increasing until now. Although empirical results of economic effects in every year from the recovered amount of overseas oil and gas development project are different, as of 2011, empirical results showed that the recovered amount of overseas oil and gas development project increase 2.226% and 0.401% in current account and real GDP respectively. And it also decrease 0.489%p in unemployment rate. Exchange rate to US dollars also decrease in amount of 0.379%.

• The Journal of Information Technology
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• v.6 no.3
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• pp.75-85
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• 2003

It is highly required to evaluate the economic value of technology in many decision making of the technology management area, for example, technology acquisition, transfer, and investments. Also evaluating the performance of R&D objectively is very important subject in the public side. So, developing the objective technology evaluation system has much usefulness in practice. In many studies, the patent information has been suggested to the valid measurement for evaluation of technology. The purpose of this study is to explore the validity of patent information as a measurement of technology evaluation.

• Journal of Korea Port Economic Association
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• v.25 no.2
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• pp.25-56
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• 2009

The purpose of this study is to analyze the components and to verify the relationship between service orientation, employee satisfaction, customer orientation and business performance of liner shipping company. In order to achieve the purpose of this study, literature survey related to service orientation, employee satisfaction, customer orientation and business performance was carried out and took a empirical analysis by the use of questionnaire method for employees in liner shipping company. The final results and conclusions are as follows; Service orientation of liner shipping company is a major element which has an effect on employee satisfaction. It has also effect on employee's dedicational attitude to achieve company's goal with pride on their duty and organization. In addition to, the relationship between service orientation, employee satisfaction, customer orientation and business performance finally reach to valuable attitude related in customer's satisfaction, and then it will read up high business performance and successful attainment.

• Journal of the Korea Society of Computer and Information
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• v.17 no.10
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• pp.185-192
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• 2012

Call Center requires an ability of agents a lot more than face-to-face contact due to being achieved communication by non face-to face channel for contact with customers. In order to improve the ability of agents, Call Center carries out various educational training according to their work experience and function and with the accomplishment of educational training, Call Center is going to fulfill to develop its quality of counseling and productivity. On the other hand, due to investment of a lot of time and budget to educational training, it is needed to grasp and manage about its effectiveness that how helpful the training is for performance of work-site operations through evaluation of educational training. Having Seen researches about evaluation of educational training until these days, most researches have mainstream to measure satisfaction and a level of learning or degree that how the learning transfers to actions. It is found that a research about an entire evaluation model should be required. This study aims to investigate effectiveness of Call Center educational training from the level of recognition by reflecting Kirkpatrick's the four levels of learning evaluation. By the four levels, reaction, learning, behavior and results, the study found out a connection with standards of evaluation about each levels. In addition, by using structural equation modeling, it was examined goodness of fit about the entire model. Furthermore, by an alternative model, considering a direct relation between a factor of reaction and behavior, it was compared and examined goodness of fit of overall model of the study model and the alternative one.

• 한국HCI학회:학술대회논문집
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• 2007.02b
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• pp.526-534
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• 2007

사용성의 주관적인 판단기준으로써 재미(Fun)라는 요소는 사용성 지각에 있어 중요한 역할을 할 수 있다는 논의는 제기된 반면 개념자체의 모호성과 객관적인 측정의 어려움으로 인해 실증적인 연구가 많이 이루어지지 못했다. 재미와 관련된 기존의 연구들은 시각적인 요인에만 국한되었다. Shneiderman(2004)은 재미를 설계하기 위한 5가지 fun-feature 중 하나로 만족스러운 소리(satisfying sound)를 제시하였는데, 시각적인 요인 못지않게 청각적인 요소는 인간-컴퓨터 상호작용에서 사용자에게 과제를 적절하게 수행해나가고 있는지에 대한 하나의 피드백으로도 작용할 수 있고, 즐거움을 줄 수 있다. 본 연구에서는 승차권 자동발매기를 중심으로 소리의 유무와 소리의 재미수준이 사용성에 어떤 영향을 미치는지 알아보고자 소리가 없는 조건, 재미없는 소리 조건, 재미있는 소리 조건에 따라 사용성을 다르게 지각할 것이라고 가정하였다. 또한 모형의 사용성 수준이 매개 변인으로 작용할 수 있다고 보고 사용하기 좋은 모형과 좋지 않은 모형 두 가지를 제시하였다. 참가자들은 두 가지 모형에 대해 각각의 소리조건에 따라 과제를 수행하고 모형과 소리 조건에 대해 집단 면접을 실시하였다. 실험 결과 재미있는 소리조건에서는 정답률이 다른 소리 조건들에 비해 더 높았으며 총클릭수는 더 적었다. 면접 결과에서는 좋지 않은 모형에 재미있는 소리는 긍정적으로 인식되지 않음을 발견하였다. 이는 Davis(1992)가 사용성이 뒷받침 되지 않은 상황에서 재미는 긍정적인 요인으로 작용하지 않는다는 주장을 지지한다. 본 연구는 재미의 한 구성 요소인 소리를 통해서 사용성에 있어 재미가 중요한 역할을 할 수 있다는 것과 사용성을 전제하지 않은 것에 있어 재미요소의 적용은 부정적으로 인식될 수 있다는 점을 제안하였다.

• Journal of Educational Research in Mathematics
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• v.14 no.1
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• pp.71-88
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• 2004

The purpose of this study was to examine particular variables that play a significant role in the difficulty of math test items in College Scholastic Ability Test (CSAT). The study also aimed to develop a model of measuring the item difficulty. Variables correlated to item difficulty were drawn from the review of the related literature and the analysis of the content and difficulty of the past test items of CSAT. The first instrument was designed by using the correlated variables. According to the results of correlation analysis, the second instrument was made by deleting the variables which showed relatively low correlation with item difficulty and by refining some variables. Several models were proposed by using the revised instrument. The comparison of the R square and cross validity of each model reveals that integrated regression model was the most stable and accurate among the proposed models. The study also showed that statistically significant predictors were choice format, content domain, behavior domain, and the degree of item familiarity in the order of proportion of variance accounted by the predictors. Despite the limited scope of the present research, it can be suggested that its findings provide useful insights into predicting math test item difficulty.

• The Korean Journal of Financial Management
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• v.25 no.4
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• pp.79-116
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• 2008

This paper examines and estimates GARCH-VaR models (RiskMetrics, GARCH, IGARCH, GJR and APARCH) with three different distributions such as Gaussian normal, Student-t, Skewness Student-t Distribution using the daily price data from Korean Stock Market during Jan. 1, 1980-Sept. 30, 2004. It also compares them. In-sample test, this finds that for all confidence level as $90%{\sim}99.9%$, the performance and accuracy of IGARCH with ${\lambda}=0.87$ and skewness Student-t distribution are superior to other models and distributions in long position, but GARCH and GJR with Skewness Student-t distribution in short position. For above 99% confidence level, the performance and accuracy of IGARCH with ${\lambda}=0.87$ in both long and short positions are superior to other models and distributions, but Skewness Student-t distribution for long position and Student-t distribution for short position are more accuracy and superior to other distributions. In-out-of sample test, these results also confirm the evidences that the above findings are consistent as well.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.362-366
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• 2016

기후 변화에 따른 국지성 집중호우, 게릴라성 호우는 도심지역 홍수피해의 주요 원인으로, 이러한 극한 강우사상에 대해 도시지역의 침수피해를 선제적으로 대응하기 위해서는 강우-유출모의 현상을 과학적인 방법으로 분석할 필요가 있다. 이러한 이유로 주요 침수발생지역에 국한하여 강우-유출 해석이 수행되어왔지만, 도시전체에 대한 분석은 시간적, 인력적 제약으로 분석이 어려운 실정이다. 본 연구에서는 대표적 도시지역인 서울시의 전체 239개 배수분구를 83개 배수구역으로 구분, 서울시 최신 UIS자료를 이용하여 각 배수구역별 도시유출모형 구축을 위한 소유역 및 관망 입력자료 DB를 GIS shape파일 형식으로 구축하였으며, 미국 EPA의 SWMM을 적용하여 도시유출모형을 구축하였다. 시간적, 인력적 제약을 극복하기 위하여 구축할 관망 기준을 수립 및 가공하여 적용하였으며, 매뉴얼을 작성하여 매개변수의 적용기준 및 DB구축절차를 표준화하여 입력자료의 일관성 및 객관성을 도모하였다. 구축한 모형의 신뢰성 확보를 위해 서울시 기왕 주요 호우사례에 대한 유출모의 결과와 유량측정 성과의 비교를 통해 모형 검증을 수행한 결과, 관측수위/모의수위의 상관계수는 대부분의 지역에서 0.9 이상으로 나타나 모형 구축결과는 적정한 것으로 판단되었다. 구축된 모형은 실시간으로 변화하는 기상상황을 합리적으로 반영하기 위한 고해상도 기상자료를 활용한 도시침수 예측정보 생산 기술 개발의 기반 자료로 활용될 예정이며, 서울시 전역의 우수관로 월류에 의한 침수 취약지역 파악 및 침수원인 분석, 상습 침수지역에 대한 하수관로 교체 및 저류지 설치 등 치수계획에 대한 기초자료로도 활용 될 수 있을 것이다.

• Management & Information Systems Review
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• v.28 no.1
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• pp.25-44
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• 2009

This study examines long term performance of initial public offerings(IPO) after book building was introduced in KOSDAQ market. We use event time portfolio approach and calendar time portfolio approach to test if the performance of IPO is fair or not in long term. We estimate the performance by using the BHAR(buy and hold abnormal return), CAR(cumulative abnormal return), WR(wealth relatives) model in event time portfolio approach. And we calculate the performance by using Fama-French three factor model, CTAR(calendar time abnormal return), RATS(Return Across Time and Securities approach) model in calendar time portfolio approach. This study shows that the long term performance of IPO is positive with statistical significance as the results of the analysis through the various research method and all windows in all kinds of firms and total firms.