• KIPS Transactions on Software and Data Engineering
• /
• v.1 no.3
• /
• pp.149-158
• /
• 2012

As service-oriented software is considered as one of solutions to fulfill the users' needs in internet service environment, it has been increased the demands of reliable service development by the composition of internet services. However a critical issue in the service development approach is to satisfy the performance requirement as well as the functional correctness for the developing services, because impatient user multiply clicks the request-button of service without a short waiting. This paper proposes a framework to examine the performance of composite service. Our testing framework provides the data of service response time to service developer by measuring the service execution time. We develope an Aspect-based timer service, and weave the service with existing services to measure the execution time. Additionally, we perform some experiments to confirm the usefulness of performance test for composite service. This framework can support to develop a good performance service by substitution of the dragging service with another new service that will be a component of composite service.

• The Journal of Advanced Prosthodontics
• /
• v.9 no.6
• /
• pp.463-469
• /
• 2017

PURPOSE. To evaluate the fit of a three-unit metal framework of fixed dental prostheses made by subtractive and additive manufacturing. MATERIALS AND METHODS. One master model of metal was fabricated. Twenty silicone impressions were made on the master die, working die of 10 poured with Type 4 stone, and working die of 10 made of scannable stone. Ten three-unit wax frameworks were fabricated by wax-up from Type IV working die. Stereolithography files of 10 three-unit frameworks were obtained using a model scanner and three-dimensional design software on a scannable working die. The three-unit wax framework was fabricated using subtractive manufacturing (SM) by applying the prepared stereolithography file, and the resin framework was fabricated by additive manufacturing (AM); both used metal alloy castings for metal frameworks. Marginal and internal gap were measured using silicone replica technique and digital microscope. Measurement data were analyzed by Kruskal-Wallis H test and Mann-Whitney U-test (${\alpha}=.05$). RESULTS. The lowest and highest gaps between premolar and molar margins were in the SM group and the AM group, respectively. There was a statistically significant difference in the marginal gap among the 3 groups (P<.001). In the marginal area where pontic was present, the largest gap was $149.39{\pm}42.30{\mu}m$ in the AM group, and the lowest gap was $24.40{\pm}11.92{\mu}m$ in the SM group. CONCLUSION. Three-unit metal frameworks made by subtractive manufacturing are clinically applicable. However, additive manufacturing requires more research to be applied clinically.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.40 no.4
• /
• pp.55-66
• /
• 2017

Korean small and medium sized software companies have tried to export their solutions or services to overseas markets. In 2016, exports of the software industry increased by 6.0% from the previous year, and the value added of the industry was 2.2 times higher than that of the manufacturing industry. From a long-term perspective, it is important to secure a global competitive advantage in order to sustain the export high value-added of the software industry. The obstacles to entry into the overseas market of small to medium enterprises are as follows: first, difficulty in product development and localization of marketing; second, lack of investment for overseas expansion; and finally, competitiveness of software technology. In particular, To overcome such obstacles, Korean small and medium sized software companies should increase the technical perfection and secure software export competitiveness. The paper presents a payment settlement framework enabling adaptive reuse and semiautomatic development of global payment settlement services. The quantitative and qualitative evaluation results are presented with domestic and overseas case studies as follows: Firstly, semi-automatic development is realized successfully by applying the framework. Secondly, it is possible to maintain consistent quality of software and to deliver maintenance services without relying on the internal human resources. Thirdly, it is possible to reduce the project duration of the same development cope to less than 50% by applying the framework. Finally, because it is based on BPMN 2.0, which is a high level design diagram, it is expected that it will be easy to implement through components connection and reduce difficulties in technology transfer and localization. Also, at the time of runtime operation, it will be effective to understand the design idea easily and to carry out additional developments without human resource who participated in the initial project.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.14 no.5
• /
• pp.969-976
• /
• 2019

A lightweight artificial intelligence hardware has made great strides in many application areas. In general, a lightweight artificial intelligence system consist of lightweight artificial intelligence engine and preprocessor including feature selection, generation, extraction, and normalization. In order to achieve optimal performance in broad range of applications, lightweight artificial intelligence system needs to choose a good preprocessing function and set their respective hyper-parameters. This paper proposes a unified framework for a lightweight artificial intelligence system and utilization method for finding models with optimal performance to use on a given dataset. The proposed unified framework can easily generate a model combined with preprocessing functions and lightweight artificial intelligence engine. In performance evaluation using handwritten image dataset and fall detection dataset measured with inertial sensor, the proposed unified framework showed building optimal artificial intelligence models with over 90% test accuracy.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.29 no.6B
• /
• pp.527-535
• /
• 2009

In this study, employing an interview survey, the progress orientation of flood management is established, and a framework and process for sustainable flood management in a river basin's context are developed to effectively achieve its goals and objectives. The Interview survey about flood management shows that to reduce flood damage, it is necessary to subdue injudicious man-made developments, to make systematic long-term plans, and to consistently implement them. In the framework, the goal is established as minimizing flood damage and building resilience against flooding, and an implementing methodology is developed, integrating five elements: integrated flood management, flood risk management, integrated watershed management, participatory decision-making process, and adaptive management. Also, evaluating the state of flood management in river basins' context is incorporated into the framework, and the evaluation results are fed back to the goal and the methodology. To effectively implement flood management, an adaptive flood management process is developed, reflecting the results of the interview survey. In this process, the participation of the persons concerned is secured, the state of flood management are evaluated periodically, and measures appropriate to the specific sites are selected and are adaptively carried out.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2022.05a
• /
• pp.499-499
• /
• 2022

급격한 도시화와 이로인한 불투수면의 증가는 유역의 물순환을 왜곡시키고 있다. 직접유출의 증가와 침투량 감소로 이어지며 이는 지하수 함유량의 감소와 하천건천화를 유발한다. 환경부는 더 이상의 물순환 왜곡을 막기위해 물환경보전법상의 물순환율을 정의하고 물순환 관리목표를 설정하였으며, 제3차 강우유출 비점오염원관리 종합대책에서 물순환 사업 추진을 위한 소권역 별 우선순위산정을 과제로써 제시하고 있다. 대표적인 물순환 사업은 저영향개발기법 설치이다. 저영향 개발기법은 토지 및 공간을 이용해야하기 때문에 설치비용이 높고 위치선정에 제약이 많으며 유지관리도 어렵다. 이에 물순환 사업에는 단순 불투수면 뿐만아니라 사회, 경제적 요소까지 고려하여야한다. 본 연구에서는 물순환 우선순위를 산정하기위해 불투수면뿐만 아니라 사회, 경제적 요소까지 고려한 종합적인 우선순위를 산정하였다. 유역 물순환 평가를 위해 PSR framework을 이용하였다. PSR framework는 OECD가 개발한 지속가능성 평가 개념이며, Pressure, State, Response 세 가지 요소로 구분해 평가하게된다. PSR framework의 기본 개념은 인간의 활동들이 환경에 압력 (P)를 주고, 이로 인해 자연의 질과 영향 (S)을 미치며, 이에대한 회복을 위해 인식과 행동을 통해 정책과 제도 등을 통해 반응 (R)한다는 것이다. 본 연구에서는 PSR framework의 평가요소 Pressure는 불투수면 및 강우, State는 물순환, 하수관거, 수질, 수생태계, Response는 협력, 인식, 재정, 토지로 구분하여 평가하였다. 최종적으로 불투수면적 감축 대상 소권역('30년 무대책 불투수면적률 25% 이상)소권역에 대하여 최종우선순위를 산정하였다.

• Archives of Craniofacial Surgery
• /
• v.10 no.2
• /
• pp.109-113
• /
• 2009

Purpose: Materials for ear reconstruction are autogeneous cartilage and artificial implants. Despite their potential for donor site complications, autogeneous cartilage frameworks remain the accepted standard for external ear reconstruction. The purposes of this study were to investigate our ear reconstruction cases for 12 years. Methods: During twelve years from January 1996 to December 2008, 70 patients visited our hospital for ear reconstruction of microtia. Among them, 65 cases used autogenous cartilage frameworks, 3 cases used tissue expander and 2 cases used artificial implants. We investigated sex & age, common site, combined malformation, operation methods & their complications, donor site & their complications, anterior chest wall deformity and aesthetic evaluation. Results: Males were affected more often than females. Male to female ratio was 1.8 : 1. The common site of microtia was right ear (72%). And hemifacial microsomia was the most common associated congenital malformation. Surgical techniques included Tanzer-Ruecker method, Tissue-expander and Artificial framework ($Medpore^{(R)}$). Incidence of complication was higher with Tissue-expander & artificial framework than with Tanzer-Ruecker method. But There are few reports of using Tissue-expander & artificial framework and there was no acceptable statistical difference. And costal cartilage was harvested in ipsilateral side and anterior chest wall deformity reported only 2 cases under 10 year-old patients. Other minor complications reported such as, wound disruption and chest wall scar, but without any serious complications. Aesthetic result was evaluated by surgeons and patients for postoperative satisfaction and clinical evaluation. Conclusion: In ear reconstruction of microtia patient, delicate surgical strategy is important for natural shape and maintenance of postoperative contour. However, many methods were introduced for reconstrucion of microtia, the authors reconstructed an auricle in Tanzer-Ruecker method, Tissue-expander and Artificial famework ($Medpore^{(R)}$) for 70 patients. In our study, we generally chose Tanzer-Ruecker method and this treatment modality was satisfactory for patients and the postoperative result was acceptable for surgeons.

• Journal of the Institute of Electronics Engineers of Korea CI
• /
• v.48 no.4
• /
• pp.9-20
• /
• 2011

Future warfare paradigm is changing to network-centric warfare and effects-based operations. In order to find first and strike the enemy in the battlefield, friendly unit requires real-time target acquisition, intelligence collection, accurate situation assessment, and timely decision. The rapid development in advanced sensor technology and wireless networks requires a significant change in operational concepts of the battlefield surveillance. In particular, the introduction of a battlefield surveillance sensor network system is a big challenge to the ground forces which have lack of automated information collection assets. Therefore this paper proposes an ontology-based context-aware framework for the battlefield surveillance sensor network system which is needed for early finding the enemy and visualizing the battlefield in the ground force operations. Compared with the performance of existing systems, the one of the proposed framework has shown highly positive results by applying the context systems evaluation method. The framework has also proven to be satisfactory by the structured evaluation method using device collaboration. Since the proposed ontology-based context-aware framework has a lot of advantages in terms of scalability and reusability, the ground force's reconnaissance and surveillance system can be widely applied to expand in the future. And, ontology-based model has some weak points such as ontology data size, processing time, and limitation of network bandwidth. However, these problems can be resolved by customizing properly to fit the mission and characteristics of the unit. Moreover, development of the next-generation communication infrastructure can expedite the intelligent surveillance and reconnaissance service and may be expected to contribute greatly to expanding the information capacity.

• Journal of Digital Convergence
• /
• v.10 no.8
• /
• pp.15-20
• /
• 2012

South Korea is carrying out and expanding smart grid pilot projects to build a framework for a national smart grid and expand overseas markets. It is important to properly evaluate performance for the projects and further develop related businesses in a more desirable direction. This study is to provide evaluation criteria for the performance of smart grid pilot projects and a basis for further continuous development according to the type of projects. Evaluation criteria were selected through reviews of documental materials and expert discussions. The viability of the proposed draft in the situation of South Korea was examined by expert Delphi surveys. The Delphi surveys were conducted twice, and therefrom drawn were 18 evaluation criteria for 6 evaluation categories.

• Spatial Information Research
• /
• v.10 no.1
• /
• pp.15-27
• /
• 2002

GIS has recognized as the Social Overhead Capital to improve national competition and to heighterl the productivity of adminstration in 1990's in Korea. As the size and the scope of the NGIS policy have drastically expanded, evaluation has become a critical process. Thus NGIS driving committee has adopted the GIS project evaluation scheme in NGIS law since 2000. But the HGIS evaluation scheme is not sufficient for the comprehensive appraisal on the GIS project in the Second National GIS Master Plan (2001-2005). This research aims to explore an the improved evaluation scheme of NGIS policy.