• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.1414-1418
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• 2009

International construction projects typically manifest difficult, complex, and varied types of risk exposures; because of this, there is a need for accurate evaluation of risk-integrated performances during the timeframe of project execution. Given the financial crisis currently affecting the world economy recession, risk management has become a more crucial part for the success of international project management. However, the majority of risk management approaches, particularly for overseas projects, are focused primarily on simple forms of checklists, formalization of risk variables affecting project performance for a specific phase, or more complicated computational methods that restricting practical utilization in real-world projects; moreover, these methods lack the conceptual basis to broadly visualize the level of risk over all phases of a project. This study suggests an efficient, yet simple risk-integrated total index to successfully assess the risk levels of overseas construction projects. To this end, this paper first investigates the life cycles and key processes of decision-making for a given project and then derives formulas to represent the total risk index (TRI) along the key decision-making processes. In addition, the study examines the relationships between TRI and performance levels based on the analysis of 126 real-world project samples. Validations using the proposed TRI showed a high correlation to project performance, signifying the usefulness of the proposed approach for construction firms when investigating the level of risks and key areas for management focus.

• 한국산학기술학회논문지
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• 제14권1호
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• pp.393-401
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• 2013

대부분의 기존 데이터베이스들은 빠른 저장 성능을 얻기 위하여 한 레코드의 속성들을 하드 디스크에 연속적으로 배치하는 레코드-지향 저장 모델을 사용하였다. 하지만 검색이 대부분인 데이터웨어하우스 시스템에는 월등한 읽기 성능 때문에 컬럼-지향 저장 방식이 적합한 모델이 되고 있다. 또한, 현재 플래시 메모리가 고속 데이터베이스 시스템을 위한 선호 저장 매체로 인정되고 있다. 본 논문에서는 고속 컬럼-지향 데이터베이스 모델을 도입하고, 고속 컬럼-지향 데이터웨어하우스 시스템을 위한 컬럼-인지 인덱스 관리 기법을 제안한다. 본 인덱스 관리 기법은 개선된 B트리에 기반하며, 중간 노드와 리프노드에서 내장 플래시 인덱스와 빈공간 압축을 통하여 높은 검색 성능을 얻는다. 성능 평가 결과를 기반으로 본 인덱스 관리 기법이 기존 기법보다 검색 처리 및 응답 시간 측면에서 더 우수함을 확인하였다.

• 한국산학기술학회논문지
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• 제11권1호
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• pp.166-174
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• 2010

SSD는 데스크탑 및 이동형 컴퓨터의 저장 장치를 지원하는 우수한 미디어이다. SSD는 비휘발성, 낮은 전력 소모, 빠른 데이터 접근 속도 등의 특징으로 데스크탑 및 서버용 데이터베이스의 핵심 저장 요소가 되었다. 하지만, 일반 RAM 메모리에 비하여 상대적으로 느린 연산 특성을 고려하여 기존의 전통적인 인덱스 관리 기법을 개선할 필요가 있다. 이를 위하여, 본 논문은 CHC-Tree 라고 하는 압축된 핫-콜드 클러스터링에 기반하는 새로운 인덱스 관리 기법을 제안한다. CHC-Tree는 인덱스 노드를 핫-콜드 세그먼트로 분류하며, 인덱스 노드의 키와 포인터를 압축한다. 콜드 세그먼트의 비활용노드의 오프셋 압축으로 느린 쓰기연산의 부담을 줄인다. 또한, 실험 결과를 통하여 기존의 B-Tree 기반의 인덱스 관리 기법보다 인덱스 검색 연산에서 26%, 인덱스 수정 연산에서 23% 이상 우수함을 확인하였다.

• Journal of information and communication convergence engineering
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• 제8권6호
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• pp.618-622
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• 2010

The damages from DDoS attacks are increasing as DDoS attacks are taking various forms. This has resulted not only in decreased reliability of organizations and corporations but also in the threat of national security. Organizations and corporations are making significant efforts in developing a system through which they can appropriately correspond to DDoS attacks. However, the studies on objective index for evaluating the performance of DDoS correspondence are lacking. The majority of the existing studies have been on the information protection & management system on a large scale. Accordingly, the scope of this thesis will be limited to DDoS correspondence to propose correspondence index for quantitatively measuring and managing them. The statistical techniques such as SMART technique and factor analysis will be utilized accordingly.

• 한국군사과학기술학회지
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• 제23권3호
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• pp.237-245
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• 2020

In this paper, I introduce Phase-Change Cooling for thermal management of high power devices that can be applied to High Power Laser and Electric Propulsion Systems which are composed of multiple distributed superheat sources. Phase-Change Cooling can be good used to efficient cooling of their heat sources. Phase-Change Cooling has extremely high efficiency of two-phase heat transport by utilizing heat of vaporization, relatively low flow rates and reduced pumps power. And I suggest TPI(Thermal Performance Index) which is a quantitative performance index of Phase-Change Cooling for thermal management. I quantify the performance of Phase-Change Cooling by introducing TPI. I present the test results of TPI's changing refrigerant, heat sink and flow rate of the Phase-Change Cooling system through the experiments and analyze these results.

• 디지털융복합연구
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• 제14권6호
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• pp.93-107
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• 2016

본 연구는 경영컨설턴트의 역량 및 컨설팅완성도가 경영성과에 미치는 영향을 파악하는데 목적이 있다. 본 연구를 위하여 최근 3년 이내에 경영컨설팅 수행경험이 있는 전국에 소재한 중소기업 500개를 선정하여 수행기업 임직원을 대상으로 총 294부의 설문자료를 수집하여 분석을 수행하였다. 연구결과 첫째, 경영컨설턴트 직무역량은 경영성과인 사업성과와 조직유효성에 유의적인 것으로 파악되었다. 둘째, 경영컨설턴트 직무역량과 공통역량은 컨설팅완성도에 유의적인 것으로 파악되었다. 셋째, 경영컨설턴트 직무역량과 컨설팅완성도는 경영성과에 유의적인 것으로 파악되었다. 넷째, 컨설팅완성도는 경영컨설턴트 직무역량이 경영성과에 미치는 영향을 매개하는 것으로 파악되었다. 다섯째, 경영자지원이 클수록 경영컨설턴트 직무역량이 조직유효성에 미치는 영향은 더욱 커지는 것으로 파악되었다. 이러한 연구결과는 성공적인 컨설팅 수행에 필요한 역량과 요인, 요인들 간의 연관성 파악을 통한 컨설팅 수행주체들에게 효율적인 컨설팅 수행방안 제시로 중소기업 경영컨설팅 활성화에 기여할 수 있을 것으로 본다.

• 한국신뢰성학회지:신뢰성응용연구
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• 제13권3호
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• pp.191-206
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• 2013

Application areas for Lifetime Performance Index(LPI), a kind of process capability index to be frequently used as a means of measuring process performance are illustrated with examples. Statistical properties for maximum likelihood and unbiased estimators of LPI are evaluated and discussed under Weibull distribution with known shape parameter. Furthermore, guidelines for selecting an estimator of LPI are also presented.

• 보건행정학회지
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• 제17권1호
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• pp.50-74
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• 2007

The purpose of this study was to identify a determent of mastery approach goal and performance approach goal using a basic concept of goal orientations and goal setting theory, and to evaluate a preference of goal achievement index as a balance score card (BSC). The study model proposed had a adoptable level of goodness of fit index(.94) and root mean square residual(.08). The meditating variable, goal contribution, totally mediated the impact of goal commitment, Y-theory human behavior, and self-efficacy but organizational resource contribution for pursuing goal orientation. Moreover, goal contribution significantly determined mastery approach goal(p<.01) and performance approach goal(.05). In standardized effects, the most powerful antecedent of mastery approach goal and performance approach goal were in order of organizational resource contribution(.27/.28), goal contribution(.21/.17), self-efficacy(.07/.06), and Y -theory human behavior and goal commitment(.05/.05), respectively. Moreover, goal contribution had a more powerful impact on mastery approach goal(.21) rather than performance approach goal(.17). In the preference of BSC, all job types preferred learning and growth index in first. In the second preference, medical doctors and pharmacists chose financial results, nurses customer service, and office managers internal processes. Each job type reflected its' own preferred BSC index to that of the other job types. In comparing a preference of four BSC index of each own job type, it was statistically different at p<.001. In conclusion, one who emphasize organizational goal contribution in pursuing goal orientation has a more strong orientation toward mastery approach goal rather than performance approach goal. A hospital should overcome and harmonize the different preferences of four BSC index since the differences might cause organizational conflicts among job types with having each unique professional norm.

• 지식경영연구
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• 제10권1호
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• pp.71-100
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• 2009

Recently, many of organizations build up their performance measurement system (PMS) to measure their knowledge management performance. However, the system that doesn't well reflect the organization's strategies as well as surroundings could obstruct their performance improvement, instead. Therefore, It is really important to establish the PMS to reflect organization's surroundings and strategies. The purpose of this study is to make a diagnosis of a performance measurement practice of a domestic university's knowledge management. To serve this research purpose, we examine the uptight performance index and PMS from existing references. And we diagnose the specific practices and maturity rates of measuring performances, and the recognition of the performance index at "D" university recently adopting balanced scorecard to performance evaluation through the survey on academic affairs committee members, performance evaluation committee members, and administration members. The method analyzing data from the survey is a gap analysis which includes alignment analysis, congruence analysis, consensus analysis, and confusion analysis. We make a diagnosis of performance measurement practices at "D" university, raise several points of this performance measurement system, and present the improvement plans from these problems.

• 품질경영학회지
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• 제39권4호
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• pp.464-479
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• 2011

The purpose of this study is that analyzing the causal relationship between Infra, Process and Performance of companies which are executing the Supply Chain Quality Management(SCQM) with their subcontractors and partners. Korean Standards Association(KSA) provides the Supply Chain Quality Management Model and Quality Collaboration Index for 4 years, but a few study has investigated the critical variables and their causal relationship to organizational performance. Therefore we examine the SCQM model and related index and choose the quality, human resource and risk management processes for identifying the path to organizational performance. In addition, exploratory factor analysis is conducted for figuring out the major factors among the 3 processes. Structural Equation Model are successively used for determining which characteristics of the infra and processes are the most critical variables to performance. The data was collected from KSA and composed of 52 companies and 346 their partners. The result shows that risk management process has no significant effect on the organizational performance and pre-production process collaboration.