• 한국콘텐츠학회논문지
• /
• 제20권12호
• /
• pp.13-22
• /
• 2020

본 연구는 영화 분야 크라우드펀딩 성공요인 실증분석을 위하여 국내 크라우드펀딩 플랫폼 텀블벅의 영화 프로젝트 중, 총 583개 데이터를 수집하여 분석을 진행하였다. 구체적으로 목표 금액, 게시글 정보, 리워드 선택 옵션, 창작자 펀딩 파워, 에디터 추천 여부, 창작자 콘텐츠 파워, 영화 유형, 코멘트 수, 댓글 수, SNS 정보 수 등 10개의 독립변인을 설정하고 크라우드펀딩 최종 달성률을 종속변인으로 설정하여 영향관계를 검증하였다. 연구 결과 영화 크라우드펀딩 프로젝트 달성률에 목표금액, 텍스트 수, 동영상 수, 에디터 추천 여부, 후원자 댓글 수, SNS 정보 수가 유의미한 영향을 미치는 것으로 드러났다. 본 연구는 '에디터 추천 여부'와 '창작자의 SNS 정보 수' 변인을 크라우드펀딩 연구 분야에 접목시켜 두 변인 모두 크라우드펀딩 달성률에 정(+)적인 영향을 미치는 것을 검증했다는 점에서 시사점을 가진다.

• Structural Engineering and Mechanics
• /
• 제16권4호
• /
• pp.479-492
• /
• 2003

Non-conforming membrane elements which have variable number of mid-side nodes with drilling degrees of freedom and which is designated as NMDx have been presented in this paper. The non-conforming elements with variable number of mid-side nodes can be efficiently used in the local mesh refinement for the in-plane structures. To guarantee the developed elements always pass the patch test, the direct modification method is incorporated into the element formulation. Detailed numerical tests in this study show the validity of the variable node NC elements developed in this study and a wide applicability of these elements to practical problems.

• 산학경영연구
• /
• 제4권
• /
• pp.281-295
• /
• 1991

Nothing is more incorrect than forecasting. Nevertheless, forecasting is one of the most important business activities for the effective management. There has been rapid changes of the growth rate in every respect of the Korean hospitaity industry, especially the hotel industry, before and after the 88 Olympic Games. Therefore, the hoteliers shall be in need of more-than-ever accourate demand forecasting for the more systematic management and control. Under the above circumstances, this study suggested the best forecasting technique and method for the better sales and operations of the hotel rooms. The number of rooms sold is selected as a dependent variable of this study which is regarded as the best representative factor of measuring the growth rate of the rooms division performance of the hotels. The first step was to select the most verifiable independent variable diferently from the other countries or other areas of Korea. As a result, the number of foreign visitors was chosen. Empirical research, i.e. correlation and multiple regression analysis, shows that this independent variable has a strong relationship with the dependent variable told above. The second procedure was to estimate the number of rooms will be sold in 1991 on the basis of the formula calculated through the multiple regression analysis. Time series technique was conducted using the data of the number of foreign visitors by purpose of travel from 1987 to 1990. For the more correct forecasting, however, it would be desirable to adopt the data from 1989 considering the product or the industry life cycle. In addition, deeper analysis for the monthly or seasonal forecasting method is needed as a future research.

• 산업경영시스템학회지
• /
• 제43권4호
• /
• pp.59-66
• /
• 2020

In this study, we consider the problem of forecasting the number of inbound foreigners visiting Korea. Forecasting tourism demand is an essential decision to plan related facilities and staffs, thus many studies have been carried out, mainly focusing on the number of inbound or outbound tourists. In order to forecast tourism demand, we use a seasonal ARIMA (SARIMA) model, as well as a SARIMAX model which additionally comprises an exogenous variable affecting the dependent variable, i.e., tourism demand. For constructing the forecasting model, we use a search procedure that can be used to determine the values of the orders of the SARIMA and SARIMAX. For the exogenous variable, we introduce factors that could cause the tourism demand reduction, such as the 9/11 attack, the SARS and MERS epidemic, and the deployment of THAAD. In this study, we propose a procedure, called Measuring Impact on Demand (MID), where the impact of each factor on tourism demand is measured and the value of the exogenous variable corresponding to the factor is determined based on the measurement. To show the performance of the proposed forecasting method, an empirical analysis was conducted where the monthly number of foreign visitors in 2019 were forecasted. It was shown that the proposed method can find more accurate forecasts than other benchmarks in terms of the mean absolute percentage error (MAPE).

• 한국통신학회논문지
• /
• 제15권2호
• /
• pp.124-136
• /
• 1990

본 논문에서는 4변수 NP 同値類 대표함수의 AND-EXOR형 최소 논리식의 표를 제시한다. 여기에서 최소 논리식이란 우선, 첫째로 적항수가 최소이고 다음에 적항수 중에 Literal 수의 총화가 최소식이며 또한 그 최소 논리식의 성질에 대해서 검토한다. 이것을 기초로 해서 AND-OR 형 2단 논리 회로의 최소 논리식과 본 논문의 알고리즘을 이용한 AND-EXOR형 2단 논리회로의 최소 논리식을 비교한다. 그 결과, AND-OR형 최소 논리식의 경우는 적항수가 모두 8이하에서, AND-EXOR 형 2단 최소 논리식의 경우는 적항수가 6이하에서 모든 함수가 생성되고 있으며 전반적으로 AND-EXOR형 최소 논리회로 쪽이 4변수 함수를 실현하는데 훨씬 적항수가 적다는 것을 알았다. 본 논문에서 제시한 알고리즘들은 SUN 3/50 상에서 실현했으며 이것을 통해서 4변수 이하의 논리함수는 본 논문에서 제시한 표에 의해서 즉시 최소형을 얻을 수가 있다. 5변수 함수에 대해서는 그 일부의 함수를 적당한 변수로 Shanon 전개해서 이것에 본 논문의 4변수 최소형을 적용함으로서 단시간내에 최소형을 얻을 수 있는 것이 가능하며 이 방법은 6변수 이상의 함수에도 적용하는 것이 가능하다고 생각된다.

• East Asian mathematical journal
• /
• 제34권1호
• /
• pp.59-67
• /
• 2018

We present new recurrence formulas for the raw and central moments of a compound binomial random variable. Our approach involves relating two compound binomial random variables that have parameters with a difference of 1 for the number of trials, but which have the same parameters for the success probability for each trial. As a consequence of our recursions, the raw and central moments of a binomial random variable are obtained in a recursive manner without the use of Stirling numbers.

• Communications for Statistical Applications and Methods
• /
• 제11권3호
• /
• pp.553-562
• /
• 2004

In this short communication we discuss the bias problems of CART in split variable selection and suggest a method to reduce the variable selection bias. Penalties proportional to the number of categories or distinct values are applied to the splitting criteria of CART. The results of empirical comparisons show that the proposed modification of CART reduces the bias in variable selection.

• 한국시뮬레이션학회:학술대회논문집
• /
• 한국시뮬레이션학회 2001년도 The Seoul International Simulation Conference
• /
• pp.269-273
• /
• 2001

Semiconductor wafer fabrication is a business of high capital investment and fast changing nature. To be competitive, the production in a fab needs to be effectively planned and scheduled starting from the ramping up phase, so that the business goals such as on-time delivery, high output volume and effective use of capital intensive equipment can be achieved. In this paper, we propose Stand Alone layout and In-Line layout are analyzed and compared while varying number of device variable changes. The comparison is performed through simulation using ProSys; a window 98 based discrete system simulation software, as a tool for comparing performance of two proposed layouts. The comparison demonstrates that when the number of device variable change is small, In-Line layout is more efficient in terms of production quantity. However, as the number of device variable change is more than 14 titles, Stand Alone layout prevails over In-Line layout.

• 한국군사과학기술학회지
• /
• 제14권2호
• /
• pp.305-312
• /
• 2011

Bacillus anthracis(Ba) is a Gram-positive spore-forming bacterium that causes the disease anthrax. The feature of Ba is the presence of two large virulence plasmids, pXO1 and pXO2. Molecular genotyping of Ba has been difficult to the lack of polymorphic DNA marker. Ba isolated from Korea has been genotyped using various nucleotide analysis methods, such as 16s rDNA sequencing and multiple-locus variable-number tandem repeat (MLVA) analysis. We identified genotypes that represent a genetic lineage in the B1 cluster. This study emphasized the need to perform molecular genotyping when attempting to verify a strain-specific Ba.

• 가정과삶의질연구
• /
• 제16권4호
• /
• pp.83-83
• /
• 1998

The purpose of this study is to investigate interpersonal support, tension in lifechanges & satisfaction. The selected sample is composed of 387 housewives in ChongJoo city. SAS pc program was used for the statistical analysis of the data. Data was analyzed by frequency, F-test, percentage, mean, Duncan's Multiple Range Test, Pearson's correlation coefficient, Regression Analysis. Major findings as follows: 1)At wedding & funeral ceremony, kin networks of her parents & parents-in law side were variables to have influence on tension in life changes. And the number of social organization participated were a variable to have influence on the satisfaction. The age of couple, education of couple, duration of marriage, income, family lifecycle, the number of children, pattern of family were variables to influence tension in life changes, but were not variables to influence on the satisfaction. 2) At usual or wedding & funeral ceremony, kin networks of her parents side were variables to influence on instrumental & companionship support. And the number of friends was a variable to influence on companionship & informational support. The number of neighbors was a variable to influence on instrumental, companionship & informational support. The number of social organization participated was a variable to influence on companionship & emotional support. The age of couple, education of couple,income, duration of marriage, family life cycle, number of children, family size, family type were variables to influence on interpersonal support. 3)The relationship between tension and satisfaction in life changes was negative, and between instrumental support and satisfaction was negative also. But between companionship support and satisfaction was positive relationship and between tension of personal &social life and instrumental support was positive relationship. The relationship between tension of marriage life and companionship support was negative and between tension of family life and information support was negative relationships. The received companionship support was lower tension in life changes than not received it. But the received instrumental support was higher tension of personal & social life. The received companionship & informational support was higher satisfaction than not received them. But the received instrumental support was lower satisfaction than not received it. 4) Instrumental & companionship support, at usual kin network of her parents in taw side, at wedding & funeral ceremony kin network of her parents side,were variables to influence on tension in life changes. Instrumental, companionship& informational support, at wedding & funeral ceremony kin network of her parents side, were variables to influence on the satisfaction