• 한국도서관정보학회지
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• 제40권3호
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• pp.119-136
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• 2009

대학이 학문적 주제를 기반으로 하기 때문에 대학도서관의 서비스도 주제를 기초로 이루어지는 것이 바람직하다. 이에 따라, 최근 몇몇 대학도서관을 중심으로 주제전문사서제가 도입되고 적용 사례가 소개되고 있지만, 제공서비스에 대한 충분한 장 단점 분석과 도입에 따른 방향성이 점검되고 있지는 못한 실정이다. 따라서, 본 연구는 주제전문사서제를 도입한 3개 대학도서관에 대한 사례 분석을 통해 적용을 위한 선결과제와 효과적인 운영방안을 제시하고자 하였다. 분석결과, 주제전문사서제를 도입한 3개 대학도서관은 역할, 인사, 평가 등에서 도입초기에 따른 다양한 문제를 보이고 있는 것으로 나타나 향후 이에 대한 보완이 시급한 것으로 조사되었다. 또한, 주제전문사서제의 도입을 위해서는 도서관내부의 합의과정과 교내 구성원에 대한 홍보가 필수적이며, 지속적인 주제전문사서 충원 및 평가, 보상체계의 마련과 함께, 장기적으로는 서비스의 지속성과 효과를 담보할 수 있는 주제전문사서 및 서비스 제공대학 간 협력체계가 필요한 것으로 조사되었다.

• 한국게임학회 논문지
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• 제18권2호
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• pp.27-36
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• 2018

본 논문에서는 모바일게임의 상생형 네트워크 운영 플랫폼을 제안한다. 논문에서 제안하는 서비스 구조의 특성은 모바일게임 산업에 접목하여 모바일 게임시장에 영향력을 미칠 수 있는 마케팅 네트워크를 형성하고, 산업 단지 내 모바일 게임개발사의 우수 게임 콘텐츠들이 사장되지 않고, 안정적으로 시장에 진입 할 수 있도록 지원 하는 우수한 기능을 지닌 G-크로스 네트워크 운영플랫폼을 제작하였다. 제안된 플랫폼 기술을 이용하면 상생형 네트워크를 통해 빠르게 배포되는 특성 구조와 아울러 새로운 게임이 상용화되어질 때 마다 다양한 데이터 지표 분석을 통하여 지속적인 타겟 마케팅을 지원할 수 있게 된다. 특히 G-Cross 마케팅전략은 주어진 게임 인프라를 활용해 사용자에게 새로운 게임에 대한 정보를 제공하고 각 게임사가 보유한 사용자층을 활용할 수 있다는 측면에서 저비용, 고효율 마케팅방법이라 판단된다.

• 한국지능시스템학회논문지
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• 제25권3호
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• pp.299-305
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• 2015

Global environmental concerns and the ever increasing need of energy, coupled with steady progress in renewable energy technologies, are opening up new opportunities for utilization of renewable energy resources. Distributed electricity generation is a suitable option for sustainable development thanks to the load management benefits and the opportunity to provide electricity to remote areas. Solar energy being easy to harness, non-polluting and never ending is one of the best renewable energy sources for electricity generation in present and future time. Due to the random and intermittent nature of solar source, PV plants require the adoption of an energy storage and management system to compensate fluctuations and to meet the energy demand during night hours. This paper presents an efficient, economic and technical model for the design of a MPPT based grid connected PV with battery storage and management system. This system satisfies the energy demand through the PV based battery energy storage system. The aim is to present PV-BES system design and management strategy to maximize the system performance and economic profitability. PV-BES (photovoltaic based battery energy storage) system is operated in different modes to verify the system feasibility. In case of excess energy (mode 1), Li-ion batteries are charged using CC-CV mechanism effectively controlled by fuzzy logic based PID control system whereas during the time of insufficient power from PV system (mode 2), batteries are used as backup to compensate the power shortage at load and likewise other modes for different scenarios. This operational mode change in PV-BES system is implemented by State flow chart technique based on SOC, DC bus voltages and solar Irradiance. Performance of the proposed PV-BES system is verified by some simulations study. Simulation results showed that proposed system can overcome the disturbance of external environmental changes, and controls the energy flow in efficient and economical way.

• 토지주택연구
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• 제9권1호
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• pp.19-28
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• 2018

The purpose of this study is to explore an implication for new perspectives and concrete approaches to Korean Land Banking by analyzing the role of the Land Bank and the Land Storage System in the formation of Chinese Land Market, Land Management, and City Management. Time scope of this research focused on Chinese reform and opening since 1978, when study of land bank began to be actively performed in China. Research targets were Land Bank and Land Storage System related to Chinese Land System, and this research targeted Chinese Land Storage System as research object, which seem to have similar tendency to Korean Land Banking System, after examining the concept of Land Bank and Land Storage System. As the research method, this research arranged the contents and changes of policy based on discussed research documents over Chinese Land Bank and Land Storage System till today since the foundation of the nation. Later, this research investigated the realistic reflection and in-depth investigation of the problems through the operational mechanism and concrete case study of Chinese Land Storage System, a similar policy to Korean land bank, the researchers will look into the reality reflected and will carry out a in-depth study of the problems. China has established its characteristic socialistic market economy system, partly adopting the concept of capitalism, supporting socialism. This way, the researcher considers that such socialistic economic factors with strong welfare aspects can be adopted also in Korea, where capitalistic market economy system is maintained, and be utilized as a new measure for development strategy.

• 한국융합학회논문지
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• 제6권4호
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• pp.33-40
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• 2015

산업과 ICT 기술간의 융합으로 새로운 부가가치를 창출할 수 있는 융합환경이 도래되어짐에 따라 경제성장과 더불어 우리의 삶의 질이 향상 되고 있지만 이러한 융합환경은 다수의 이익만을 제공하는 것이 아니라 융복합적인 보안 위협이 발생됨에 따라 다양한 보안문제를 발생시켰다. 이러한 보안 문제를 해결하기 위해서는 기존의 기술적인 접근으로 단편적인 보안 문제 해결방식이 아닌 통합적인 관점에서 보안문제를 접근할 필요가 있다. 그래서 본 연구에서는 전략적 관점, 관리적/운영적관점, 기술적 관점 등 다차원적인 관점에서 신뢰성 있는 보안 거버넌스 관리를 할 수 있도록 인적측면이 고려되어진 보안 거버넌스 프레임워크를 개발하였다. 그래서 이 프레임워크를 통해 보안 관리에 대한 단일 기준을 제시함으로서 최고 경영진들의 직접적인 관여가 가능하고 조직구성원들이 스스로 보안활동을 수행하고 책임 질수 있는 신뢰성 있는 보안관리체계를 구축할 수 있을 것이다.

• 대기
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• 제17권3호
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• pp.217-230
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• 2007

Using the Lorenz-95 simple model, which can simulate many atmospheric characteristics, we compare the performance of ensemble strategies such as bred vectors, the bred vectors rotated (to be orthogonal to each bred member), and the Ensemble Transform Kalman Filter (ETKF). The performance metrics used are the RMSE of ensemble means, the ratio of RMS error of ensemble mean to the spread of ensemble, rank histograms to see if the ensemble member can well represent the true probability density function (pdf), and the distribution of eigen-values of the forecast ensemble, which can provide useful information on the independence of each member. In the meantime, the orthogonal bred vectors can achieve the considerable progress comparing the bred vectors in all aspects of RMSE, spread, and independence of members. When we rotate the bred vectors for orthogonalization, the improvement rate for the spread of ensemble is almost as double as that for RMS error of ensemble mean compared to the non-rotated bred vectors on a simple model. It appears that the result is consistent with the tentative test on the operational model in KMA. In conclusion, ETKF is superior to the other two methods in all terms of the assesment ways we used when it comes to ensemble prediction. But we cannot decide which perturbation strategy is better in aspect of the structure of the background error covariance. It appears that further studies on the best perturbation way for hybrid variational data assimilation to consider an error-of-the-day(EOTD) should be needed.

• Clinical and Experimental Pediatrics
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• 제56권6호
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• pp.235-241
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• 2013

Repair of tetralogy of Fallot (TOF) has shown excellent outcomes. However it leaves varying degrees of residual hemodynamic impairment, with severe pulmonary stenosis (PS) and free pulmonary regurgitation (PR) at both ends of the spectrum. Since the 1980s, studies evaluating late outcomes after TOF repair revealed the adverse impacts of residual chronic PR on RV volume and function; thus, a turnaround of operational strategies has occurred from aggressive RV outflow tract (RVOT) reconstruction for complete relief of RVOT obstruction to conservative RVOT reconstruction for limiting PR. This transformation has raised the question of how much residual PS after conservative RVOT reconstruction is acceptable. Besides, as pulmonary valve replacement (PVR) increases in patients with RV deterioration from residual PR, there is concern regarding when it should be performed. Regarding residual PS, several studies revealed that PS in addition to PR was associated with less PR and a small RV volume. This suggests that PS combined with PR makes RV diastolic property to protect against dilatation through RV hypertrophy and supports conservative RVOT enlargement despite residual PS. Also, several studies have revealed the pre-PVR threshold of RV parameters for the normalization of RV volume and function after PVR, and based on these results, the indications for PVR have been revised. Although there is no established strategy, better understanding of RV mechanics, development of new surgical and interventional techniques, and evidence for the effect of PVR on RV reverse remodeling and its late outcome will aid us to optimize the management of TOF.

• Journal of Microbiology and Biotechnology
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• 제22권11호
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• pp.1486-1493
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• 2012

In this study, we investigated whether galactooligosaccharide (GOS) can be stably and steadily synthesized using immobilized ${\beta}$-galactosidase (${\beta}$-gal) inclusion body (IB)-containing E. coli cells during long-term repeated-batch operation. To improve the operational stability of this enzyme reactor system, immobilized E. coli cells were crosslinked with glutaraldehyde (GA) after immobilization of the E. coli. When we treated with 2% GA for E. coli crosslinking, GOS production continued to an elapsed time of 576 h, in which seven batch runs were operated consecutively. GOS production ranged from 51.6 to 78.5 g/l ($71.2{\pm}10.5$ g/l, n = 7) during those batch operations. In contrast, when we crosslinked E. coli with 4% GA, GOS production ranged from 31.5 to 64.0 g/l ($52.3{\pm}10.8$, n = 4), and only four consecutive batch runs were operated. Although we did not use an industrial ${\beta}$-gal for GOS production, in which a thermophile is used routinely, this represents the longest operation time for GOS production using E. coli ${\beta}$-gal. Improved stability and durability of the cell immobilization system were achieved using the crosslinking protocol. This strategy could be directly applied to other microbial enzyme reactor systems using cell immobilization to extend the operation time and/or improve the reactor system stability.

• 지식경영연구
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• 제17권3호
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• pp.93-116
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• 2016

Knowledge, as a source of firm's competitive edges, has been drawing attention, while numerous enterprises are investing huge amount of assets to foster the right environments for executing knowledge management (KM). As a practical way of such KM, knowledge management systems (KMS) support the creation, diffusion, and utilization of knowledge, which are the tools for practicing such management style. Recently, the customer centers which make the closest contact with the customers are being concerned about the establishment of KMS. Considering the characteristics of real-time problem solving in customer centers during the consultation with the customers, the importance of KMS is paramount to the centers. This study analyzes major factors influencing the success and utilization of the customer center KMS's reestablishment, as an exploratory case study of the reestablishment of KMS in the customer center of K insurance company. First, the characteristic differences between the customer center's KMS and the traditional KMS are discussed, and the triangulation technique is applied to secure objectivity of this case study's findings. Major results of the case study state that, for the success of KMS and improvement of utilization, the followings should be considered preferentially: excellent system quality (accessibility, user convenience, easy searching, speed/menus); high information quality (accuracy, usefulness, timeliness, task-relevance, diversity, degree of specification); appropriate operation strategy and process for the utilization of system (education, training opportunity, appropriate personnel, speed and procedure of approval, compensation/evaluation); and change management via the support from the CEO's level (concern and participation of CEO, will to propel the project, investment, advertisement, etc.). This study provides practical suggestions with respect to factors which should be more carefully dealt with, since still many customer centers have hard time establishing and operating KMS due to lack of previous studies.

• Journal of Information Technology Applications and Management
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• 제16권4호
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• pp.205-222
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• 2009

Considering time-lag in the performance evaluation of information system (IS) investment is important because its effect reveals after certain period of time passed. Particularly it is more in the systems of e-government informatization projects which the amount of investment and the scale of business are huge. Many methods to solve this issue have been proposed such as system dynamics methods, simulations, structural equations etc. However, it is still difficult and unsolved problem because collecting practical data for time-lag analysis is very hard. In this paper, we analyze IS time-lag effect through factor analysis using the accumulated practical operational DB data. For the performance evaluation of the G4C system, the representative e-government web portal, we selected eleven factors reflecting time passing in G4C DB data. With these factors this paper conduct time-lag analysis in four view points. First, we conducted 'Stabilizing of G4C system' and got a result that IS is needed about three years for the stabilization. Second, we conducted 'Utilization of G4C system' and got a result that the utilization reaches appropriate level after in three years later after the introduction of G4C system. Third, we conducted 'Cost reduction effect' and got a result that cost reduction is stable in the third year after the introduction of G4C system. Lastly, we conducted 'System maturity effect' and got a result that the system reaches to the quality level that users expect after third to fourth years. According to the results of this research, we found that performance of IS improv continuously not immediately, and it needs three or four years of time-lag.