• 경영정보학연구
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• 제13권3호
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• pp.99-121
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• 2011

모바일 정보기술의 발전으로 시간과 공간의 제약을 극복한 스마트워크의 시대가 열렸다. 조직에서는 똑똑한 단말기와 끊김없는 접속을 통해 스마트워크에 적합한 업무 방식과 서비스를 제공하고 있으며, 나아가 스마트워크를 활용하여 조직 활동과 조정 및 협업 프로세스를 재구성하고 있다. 이러한 활동을 통해 조직의 생산성과 성과를 극적으로 향상시키고 있으며, 스마트워크에 대한 관심도 고조되고 있다. 하지만 높은 관심에도 불구하고 스마트워크를 통해 극복된 시공간 제약조건을 체계적으로 설명하는 연구는 부족한 실정이다. 따라서 본 연구는 성공적으로 스마트워크를 구축하여 운영 중인 서울도시철도의 사례(SMRT T&F)를 시간지리학의 제약조건에 기반한 프레임워크를 통해 분석하였다. SMRT T&F 사례 분석을 통해 조직에서 시간과 공간의 제약조건을 극복하는 과정뿐 아니라 스마트워크를 성공적으로 구축하기 위해 필요한 성공 요인을 도출하였다. 또한 본 연구의 이론적 실무적 시사점을 밝히고, 향후 스마트워크 관련 연구 방안에 대해서도 제시하였다.

• 한국건설관리학회논문집
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• 제5권6호
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• pp.72-79
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• 2004

기존의 CPM 관리방식은 정해진 시간과 비용 내에서 프로젝트를 완료하기 위한 목적으로 건설분야에 활용되어 공기지연이 발생하지 않도록 관리하는데 초점을 두고 있으나, 조기 완공을 유도하지는 못하여 왔다. 기존의 CPM 공정계획의 경우에 학생증후군(Student Syndrome)과 파킨슨법칙(Parkinson's Law)이 작용할 경우 조기 완공의 효과를 얻기는 어렵다. 본 연구는 건설 프로젝트의 공기 산정에 제약이론(Theory of Constraints)을 적용하였으며, 이는 공정계획에서의 새로운 관리기법을 개발하는데 사용되어온 Critical Chain을 일컫는다. 이러한 Critical Chain의 개념은 기존 공정계획 방법에서의 문제점을 해결하기 위하여 이용되었다 본 논문에서는 기존 공정계획 방법의 문제점을 해결하기 위하여 Critical Chain의 개념을 적용하여 확률적인 공기산정과 공정버퍼(buffer)를 이용한 공정계획 합리화 방안을 제시하였다.

• 대한음성학회지:말소리
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• 제38호
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• pp.41-70
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• 1999

Researches on perception have, in recent years, been increasingly popular as a means of accounting for cross-linguistic sound patterns (Ohala, 1992; Hemming, 1995; Jun, 1995; Steriade, 1997 among others). In loanword phonology, Silverman(1990, 1992) argues that words from a source language are scanned through the perceptual level and that the features perceived by a speaker are stored in the input to be processed according to his/her native language's phonological constraints. The purpose of this paper is to test the validity of Silverman's proposal by examining the correlation between perception and production of Korean learners of English. We specifically focussed on perception and production of stop release by contrasting English loanwords with English words loarned through education to see if there were any significant differences. The results showed that there was no substantive correlation between the Korean speakers' perception of the loanwords pronounced by English speakers and their own production of those words. In the case of English words, however, the Korean speakers' production was closely related with their perception, although some inter-speaker variations were observed. With Optimality Theory (Prince & Smolenksy, 1993) as a theoretical framework of analysis, it was shown that the theory is a useful means of implementing a phonetics-phonology interface and relating perceptual processes with speech production. Specifically, under the assumption that loanwords with [t]~[t/sup h/] alternation (e.g.,'cut') are originally borrowed into Korean as two different input forms, all the alternations could be straightforwardly accounted for in terms of a unified ranking of constraints.

• 산업경영시스템학회지
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• 제41권4호
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• pp.22-33
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• 2018

Recently domestic manufacturing companies have been experiencing worsening profitability and stunted growth due to the long-term economic recession and the rapid rise of developing countries such as China and Southeast Asia. These difficulties force many companies to concentrate their core competencies on new value creation and innovation in order to gain momentum for new growth. Enterprise Resource Planning (ERP) has been considered as one of viable solutions. Among the various modules in ERP, shop floor control function in the production management module is rather limited. In order to overcome this problem, Manufacturing Execution System (MES) has been used as a subsystem which has a strong information gathering power and flexibility. Both systems interact closely with each other. In particular, ERP requires fast, accurate shop floor information at MES. This paper describes how to synchronize relevant information between ERP and MES with theory of constraints (TOC). The processing time information transmitted from the MES workplace is received at the ERP workplace. In the process, the received processing time is causing information distortion in ERP, when the information gathering standard of MES is different from the ERP information interpretation standard. The Drum-Buffer-Rope theory of TOC was applied to resolve this problem, therefore, information synchronization between both systems was made. As a precondition, the standard time of the upper ERP system was rearranged according to the capacity constraints resource. As a result, standard time restructuring has affected changes in labor costs. Standard labor costs have come close to actual ones, and information synchronization of MES transmission data has improved the reliability of standard product costs, such that it enabled various company-wide restructuring actions to be much more effective.

• 경영과학
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• 제20권2호
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• pp.197-204
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• 2003

Comparison challenge approach is proposed as a form of challenger-activated. just-in-time Internet advertising. To develop a framework for a comparison challenge, we propose a theory of comparison value. A comparison is regarded valuable if a comparison opportunity is available and if the comparison is relevant and informative, has an appropriate level of detail, and is advantageous and trustworthy. Based on this theory, the CompareMe and CompareThem strategies are devised, and comparable objects are classified in terms of price and performance dominance as well as the scope of proximity. The idea is demonstrated with a comparison of PCs from five leading manufacturers. To assist in the planning of the comparison challenge, a mathematical programming model was formulated to maximize the value of comparison under the constraints of the comparison opportunity and budget. The model is applied to eight scenarios in terms of the range of comparing objects. The models under various scenarios are tested and contrasted with the real-world example of PCs. We found the ad effect of comparison challenge to be substantially better than banners (4.75 times) and similarity-based comparisons (2.77 times), providing customers with better performance and reduced prices.

• Composites Research
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• 제17권4호
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• pp.25-31
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• 2004

본 연구에서는 다중세포로 구성된 타원형 단면 복합재료 블레이드의 정밀 1차원 보 해석모델을 개발하였다. 보의 정식화를 위하여 Reissner의 반보족에너지 함수를 이용하였으며, 고전적인 강성도 및 유연도법을 결합한 혼합보 이론 체계를 구축하였다. 타원단면의 특성계수들을 구하기 위해 단면의 외곽선을 유한개의 선분으로 분할하고 여기에 Gauss 적분을 수행하였다. 또한, 단면을 구성하는 각 세포에 대해 4개의 연속방정식이 충족되도록 구성하였다. 개발된 보 이론을 단일 및 이중세포로 구성된 타원형 복합재료 블레이드에 적용하였으며, 다차원 정밀 유한요소 해석 결과와 비교하여 그 타당성을 확보하였다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2001년도 추계학술대회논문집 I
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• pp.297-303
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• 2001

This research presents an analytical model to characterize the ball bearing vibration due to the waviness in a rigid rotor supported by multi-row ball bearings considering centrifugal force and gyroscopic moment of ball. The effects of centrifugal force and gyroscopic moment are introduced to the kinematic constraints and force equilibrium equations. The waviness of ball and races is modeled by the superposition of sinusoidal function and it is introduced to position vectors of race curvature center to use the Hertzian contact theory in order to calculate the elastic deflection and nonlinear contact force resulting from the waviness while the rotor has translational and angular motion. They can be determined by solving the nonlinear equations of motion with five degrees of freedom by using the Runge-Kutta-Fehlberg algorithm. The accuracy of this research is validated by comparing with the results of the prior researches. It characterizes the vibration frequencies resulting from the various kinds of waviness in rolling elements, the harmonic frequencies resulting from the nonlinear load-deflection characteristics of ball bearing resulting from the waviness interaction.

• Journal of Smart Tourism
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• 제1권2호
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• pp.37-46
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• 2021

The travel-related applications on a smartphone help tourists make a reservation before their trip conveniently; use a map, direction guidance, and translation services during the travel; evaluate and recommend travel services communicating with others after their journey. This study examines the relationships among affordances and constraints provided by the mini-program, users' perceived value, and travel-related mini-program (TRMP) usage by analyzing the structural equation modeling. An online questionnaire was developed from the available scales in the published literature. A total of 651 TRMP users responded to the survey, and 448 valid responses were included for analysis. Affordance, including physical, cognitive, sensory, and functional affordance, significantly influenced the hedonic value of TRMP; utilitarian value except for cognitive affordance. There were negative relationships between unfamiliarity and both types of value. The utilitarian and hedonic value of TRMP significantly influenced both the exploitative and explorative use of TRMP. Travel-related mobile applications are dramatically increased in the tourism field. This research sheds light on TRMP usage, as a new and smart device, from a user's perspective based on the affordance theory. This study represents a valuable direction regarding the emerging travel-related online platforms in tourism.

• 융합보안논문지
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• 제18권2호
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• pp.41-47
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• 2018

클라우제비츠의 삼위일체론은 전쟁이론가들의 전쟁사와 전략 분석이론으로 자주 사용된다. 사이버공간 전쟁에 관한 현재까지의 연구는 법률, 정책, 조직구성, 인력 및 훈련 방법 등 사이버공간 전쟁의 대비 위주로 연구가 이루어졌다고 할 수 있다. 상대적으로 사이버공간 전쟁의 특성을 이해하고 재래식 전쟁과 어떻게 다르며, 어떻게 분석해야 하는가에 관한 연구가 부족한 실정이다. 본 연구에서는 클라우제비츠의 삼위일체론 관점에서 전쟁의 본질을 지성(Intellect) 용기(Bravery) 격정(Passion) 영역 중심으로 분석하여 공간적 시간적 제약 조건 아래에서 사이버공간의 속성과 특징에 맞도록 보완하여 사이버공간 전쟁 해석모델을 설계하였다. 또한, 해석모델을 과거 이라크전 사례에 적용하여 사이버전이 전쟁 승리에 긍정적인 영향을 주었음을 이론적으로 제시한다.

• International Journal of Computer Science & Network Security
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• 제22권10호
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• pp.262-270
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• 2022

In the past two decades, there has been an increasing interest in project knowledge management, as knowledge is a crucial resource for project management success. Knowledge capture and sharing are two effective project management practices. Capturing and sharing project knowledge has become more efficient due to technological advances. Nevertheless, present technologies face several technical, functional, and usage obstacles and constraints. Thus, Blockchain technology might provide promising answers, yet, there is still a dearth of understanding regarding the technology's proper and practical application. Consequently, the goal of this study was to fill the gap in the literature about the adoption of Blockchain technology and to investigate the project stakeholders' acceptance and willingness to utilize the technology for capturing and sharing project knowledge. Due to this inquiry's exploratory and inductive characteristics, qualitative research methodology was used, namely the Grounded Theory research approach. Accordingly, eighteen in-depth, semi-structured interviews were conducted to collect the data. Concurrent data collection and analysis were undertaken, with findings emerging after three coding steps. Four influencing factors and one moderating factor were identified as affecting users' acceptance of Blockchain technology for capturing and sharing project knowledge. Consequently, the results of the study aimed to fill a gap in the existing literature by undertaking a comprehensive analysis of the unrealized potential of Blockchain technology to improve knowledge capture and sharing in the project management environment.