• 정보처리학회논문지:소프트웨어 및 데이터공학
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• 제6권7호
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• pp.337-352
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• 2017

복제 및 소유(Clone-and-own) 재사용은 기존의 소프트웨어 제품을 복사하고 수정하여 새로운 소프트웨어를 개발하는 방법이다. 복제 및 소유 재사용으로 개발된 레거시 소프트웨어 제품군은 일반적으로 리팩토링 없이 패치 업 되고 구조적으로 저하되기 때문에 높은 유지보수 비용을 필요로 하고 오류가 발생하기 쉬운 경향이 있다. 기존에 복제 및 소유 재사용 방법을 사용했던 많은 회사들이 이러한 문제를 해결하고 소프트웨어 자산을 더 체계적으로 재사용하고 관리하기 위하여 레거시 제품들을 소프트웨어 제품라인으로 전환하려고 하고 있다. 하지만 대부분의 기존 방법들은 가변점(Variation points)을 디자인과 코드로부터 분리해서 모델링하고 관리하지 않고 디자인과 코드에 바로 임베드시킨다. 즉, 가변점이 가변성 모델을 기반으로 체계적으로 생성되고 관리되지 않는다. 이러한 기존 방법들은 다음의 문제를 야기한다. 기존 방법에서는 가변점 간 관계를 이해하기가 어렵기 때문에 가변점이 임베드 된 코드를 유지보수하기가 어렵고 코드가 변경 및 진화될 때 오류가 생기기 쉽다. 또한 소프트웨어 제품라인이 진화할 때 디자인/코드 자산이 적합한 리팩토링을 적용하여 체계적으로 변경되는 것이 아니라, 애드 혹(Ad-hoc) 방식으로 직접적으로 변경되는 경향이 있다. 본 논문에서는 이러한 문제를 해결하기 위하여 레거시 어플리케이션 제품군으로부터 소프트웨어 제품라인 자산을 구축하는 휘처 기반의 방법을 제안한다. 제안하는 방법에서는 가변점과 가변점 간 관계를 식별하고 이들을 구현으로부터 분리하여 휘처 모델로 모델링한다. 그리고 휘처 모델을 기반으로 레거시 어플리케이션으로부터 소프트웨어 제품라인 자산을 추출하고 관리한다. 제안하는 방법을 레거시 Notepad++ 제품군에 적용을 하여 방법의 실행가능성을 검증하였다.

• 한국의류산업학회지
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• 제20권6호
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• pp.645-655
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• 2018

Online to Offline(O2O), a new model of e-commerce, has been gradually recognized and accepted by consumers. Electronic commerce has become diversified and O2O marketing is the new trend of e-commerce. The rapid popularization of mobile Internet and online shopping makes O2O service gets more attention. Although recently O2O service and O2O marketing get much attention, there is no much preceding research about the antecedents of mobile shopping of O2O market. The purpose of the study is to examine the effect of shopping orientation on intention to reuse O2O services and the moderating effect of impulse buying tendency. A total of 209 surveys were collected online in total for the data of the study. The key findings of this study are as follows: First, convenience seeking shopping orientation has a positive effect on the intention to reuse O2O service and brand seeking shopping orientation has, too. Second, impulse buying tendency positively moderated the relationship between hedonic seeking shopping orientation and intention to reuse O2O service, and negatively moderated sales seeking shopping orientation and intention to reuse O2O service. The results of this study presented some implications for operators at O2O service area. Research findings and study limitations are discussed.

• 한국경영과학회지
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• 제30권4호
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• pp.131-150
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• 2005

One of the reasons for popularity of online game is owing to the interactions with other game users that would lead game the users easily involving in it. Such a holistic state is called flow. Theoretically and empirically flow is one of the antecedents influencing the intension of reusing online game. However, since there are so many kinds in online games, all of them are not the same in the way of feeling flow and level of the relationship with reuse. The objective of this study is to analyze the relationship between flow, fators influencing flow and reuse intension in online games genre by genre. For this purpose, we classily online game into role playing, board, arcade and simulation, and suggest a research model that would explain relationship between online game and flow comparing its difference among four game genres. Sampling 730 from online game users, we analyze the suggested model empirically by PLS and prove it to be a valid one. The result of this study would not only provide differentiate Insights to the online game providers in each genre practically but also contribute to explaining intrinsic motivation for the use of information technology theoretically.

• 한국정보처리학회논문지
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• 제7권5호
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• pp.1388-1400
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• 2000

An important technical issue in recent software development is to make needed software by the composition of components that are assemblable, and configurable, and independently extracted. The main advantage of component-based software development is reducing development time and cost. It is more cost-effective in development time to use components that are already developed than developing from scratch. There are two ways of component-based software development: one is to compose self-developed components, and the other is to by the components developed by third-parties and compose them. In the second case, existing non component programs must can be used for reuse in the component development. In this paper, we approach two methods for increase of reusability of Java program. First, we suggest the technique of extracting the elements suitable for the Beans component model from Java program, and then we show a process and a guideline of converting the extract elements into the Beans component model. Second, we suggest a technique of automatically extracting component information from the Java Beans component, expressing them in XML, its is possible to reuse the efficient component environment.

• 펄프종이기술
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• 제36권2호
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• pp.54-59
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• 2004

The methods for the minimization of fresh water consumption, waste water generation and water contamination have been greatly investigated and developed for last ten years. Recently, the rising cost of waste water treatment and the more strict environmental regulation lead to the higher demand of more efficient and systematic methods for process water management. The water reuse technology, which not only reduce the process water needs but also minimize waste water generation within the process, could be one of most efficient way for current demand. In this study, the practical way for reduction of water pollution and optimal reuse or recycle of process water in a newsprint mill was investigated by using a simulation model. The result of computer simulation showed that the COD level of approach system could be reduced by 50% after the stock concentration at the 2nd disc filter was increased upto 30%. The application of WRDF(Wrinkled Rotary Drum Filter) to the newsprint mill was carried out with pilot scale. The process water treated by WRDF had enough cleanliness to substitute the forming fabric shower water with the PDF water, which could result in the 30% reduction in fresh water consumption.

• 품질경영학회지
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• 제44권1호
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• pp.199-214
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• 2016

Purpose: The present study was designed to examine the casual relationships among performance and arts information service quality, initial trust, user satisfaction, reuse intention and prosumer activity in social network service(SNS). Also, we intended to explore significant factors on use performance of SNS through causal model analysis in the viewpoint of total effect. Methods: As a survey tool, questionnaire has obtained validity and reliability through literature survey, exploratory survey and pretest and sample 403 was selected. For statistical treatment of pretest and main analysis, SPSS18.0 and AMOS18.0 were employed and structural equation model was employed as analysis method. Results: Result of this study shows as follows. Two factors (precision and reciprocal action) have an effect on user satisfaction, initial trust, reuse intention and prosumer activity. We found that with an importance of initial trust, prosumer activity can be a useful and significant factor in causal relationship of SNS. Conclusion: The present study shows that two factors(precision and reciprocal action) in via of initial trust, were important factors that related companies have to emphasize to raise performance, And also we confirmed new factor 'prosumer activity' through this study. However, the present study has some limitations to be studied in the future.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권1호
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• pp.186-205
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• 2019

Intercell interference coordination (ICIC) is considered as a promising technique to increase the spectral efficiency of OFDMA cellular systems. The soft frequency reuse (SFR) and fractional frequency reuse (FFR) are representative and efficient management techniques for ICIC. Herein, to enhance the performance of the SFR scheme, we propose a call admission (CAC) scheme. In this CAC scheme, called Spectrum handoff-SFR(S-SFR), the spectrum handoff technique is applied to the user equipment (UE) located near the cell center. We derive the traffic analysis model to describe the S-SFR. In addition, a two-dimensional (2-D) Markov chain and an outage analysis are used in our analytical model. From the traffic analysis, the significant performance measures are the outage probability, call blocking probability, system throughput and resource utilization. Based on those, the outage probability and system throughput are obtained using resource utilization as an interference pattern. The analytical results are verified with computer simulation results. Finally, we compare our proposed scheme with other ICI schemes.

• 한국농공학회논문집
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• 제54권6호
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• pp.53-63
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• 2012

The objectives of this study were to develop a linked watershed-waterbody modeling system and to assess the impacts of indirect wastewater reuse on irrigation water quality. The Osan stream watershed within Gyeonggi-do of South Korea was selected for this study. The linked modeling system was composed of the SWAT (Soil and water assessment tool) and QUALKO2 models. The SWAT model was calibrated and validated using the stream discharge and water quality data from 2010 to 2011. Runoff and non-point source pollutants from each subbasin and stream discharge from 1980 to 2009 were simulated by the SWAT model and applied to the QUALKO2 model. The QUALKO2 model was calibrated and validated under the conditions of low water and normal discharges, respectively. Finally, The 10-day irrigation water quality from April to September was simulated. The statistical measures of coefficient of determination ($R^2$), reliability index (RI), and efficiency index (EI) were used to evaluate the system performance. The $R^2$, RI and EI values ranged from 0.5 to 1.0, 1.03 to 1.92, and -35.03 to 0.95, respectively. The 10-day irrigation water quality showed the concentrations of BOD and coliform exceeded the water quality guidelines for wastewater reuse. The linked modeling system can be a useful tool to estimate non-point source pollutant loads in watershed and to control the water quality of effluent from a wastewater treatment plant and irrigation water in the downstream waterbody.

• 품질경영학회지
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• 제41권4호
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• pp.541-553
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• 2013

Purpose: This study intends to offer strategic implications that can be used in emergency medical service of large-size hospital through analysis of causal relationship among factors such as emergency medical service, patient value, patient satisfaction and reuse intention. Methods: Differential model was introduced to test causal relationship. Questionnaire was developed, and data was collected and analyzed with Structural Equation Modeling. Results: As a result of empirical analysis, we found that emergency medical service qualities of general hospital could be six components. Image of hospital, medical facilities, and attitude of medical staff are positively related to patient satisfaction and reuse intention. Conclusion: This study offers practical implications to relevant managers, at the same time it has limitations to be solved through additional study in future.

• Membrane and Water Treatment
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• 제6권2호
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• pp.161-172
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• 2015

Forward osmosis (FO) is an emerging membrane technology with potential applications in desalination and wastewater reclamation. The osmotic pressure gradient across the FO membrane is used to generate water flux. In this study, flux performance and foulant deposition on the FO membrane were systematically investigated with a co-current cross-flow membrane system. Sodium alginate (SA), bovine serum albumin (BSA) and tannic acid (TA) were used as model foulants. Organics adsorbed on the membrane were peeled off via oscillation and characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). When an initial flux of $8.42L/m^2h$ was applied, both flux reduction and foulant deposition were slight for the feed solution containing BSA and TA. In comparison, flux reduction and foulant deposition were much more severe for the feed solution containing SA, as a distinct SA cake-layer was formed on the membrane surface and played a crucial role in membrane fouling. In addition, as the initial SA concentration increased in FS, the thickness of the cake-layer increased remarkably, and the membrane fouling became more severe.