• 인터넷정보학회논문지
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• 제18권5호
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• pp.113-121
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• 2017

Company A's core competency is IT internet security services. The Web diagnosis team analyzes the vulnerability of customer's internet web servers and provides remedy reports. Traditionally, Company A management has utilized a simple table format report for resource planning. But these reports do not notify the timing of human resource commitment. So, upper management asked its team leader to organize a task team and design a visual dashboard for decision making with the help of outside professional. The Task team selected the web security diagnosis practice process as a pilot and designed a dashboard for performance evaluation. A structural design process was implemented during the heuristic working process. Some KPI (key performance indicators) for checking the productivity of internet web security vulnerability reporting are recommended with the calculation logics. This paper will contribute for security service management to plan and address KPI design policy, target process selection, and KPI calculation logics with actual sample data.

• 대한안전경영과학회지
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• 제14권3호
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• pp.39-48
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• 2012

Risk Assessment to list possible safety disasters and their probability and severity is the starting point for effective safety management on construction project site. However, the safety managers in owners, construction supervisors, contractors, and sub-contractors still have difficulties in judging the priorities of safety activities and preparing responses to each potential safety disasters. Therefore, this study aimed to suggest a systematic method in assessing safety risk prior to commencement with the agreement of stakeholders. FMECA(failure mode effects and criticality analysis) was selected as a main assessment tool and it was modified according to the characteristics of construction projects and trades. Each risk is, firstly, evaluated with occurrence probability, possible loss and impacts to projects, and detections, and then risk priority number(RPN) is calculated. Subsequently, the managers of each stakeholder discuss the types, timing, and responsibilities of responses as a group decision-making process.

• 전자공학회논문지T
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• 제35T권3호
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• pp.9-14
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• 1998

장모음 음성인식을 전자회로로 수행하였다. 레벨 압축은 음성 파형을 직렬 펄스로 변화시킬 수 있었다 이 펄스들로 모음을 구별하는 정보가 된다. 펄스의 샘풀링은 한 단위로 모음의 피치 직렬신호를 얻어지는 레지스터 에 의해서 이루어진다. 샘풀링 펄스에 의한 시간제어 펄스는 음성파형의 첩두치 펄스에 의해 발진되어 진다. 이 레지스터에 있는 병렬 데이터는 만약 OO이면 OO이다는 규칙으로 이루처지는 의지결정 회로의 뜻에 따라 음성 심볼이 인식되어진다.

• 자연과학논문집
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• 제7권
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• pp.115-120
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• 1995

실 시간 처리 시스템에서의 시간제약 조건을 충족시키는 바람직한 수단으로 근사값 계산 방안이 제안되었지만, 이에 대한 근본적 이론연구는 깊이 고찰되어 있지 않은 형편이다. 이에 본 논문에서는 실제 응용그로그램에서의 근사값 계산 방안의 체택 당위성을 판단할 수 있는 이론적 결정 방법을 제시하였다. 이로써 실시간에서의 시스템 예측도와 대응능력을 높여, 효과적인 자원관리와 제약조건을 충족시킬 수 있도록 한다.

• 산업경영시스템학회지
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• 제10권16호
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• pp.129-132
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• 1987

Multi-item inventory problems can be well characterized by the nature of interaction of the quantities and timing. This interaction may be due to the effect of certain combination of orders. It is that the set-up cost of ordering individual items can be saved by jointly ordering at a time. This study finds a decision criteria of optimum inventory policy through the comparisons of individual multi-item order policy(IMP), joint multi-item order policy(JMP), augmented multi-item order policy(AMP) in cost ratio. Subsequently we assume that there exists a unique optimum order level corresponding to an optimum reorder range for the augmented multi-item order, at which a cost saying is maximum.

• 대한산업공학회지
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• 제25권4호
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• pp.466-475
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• 1999

A backward Dynamic Programming(DP) model for the optimal facility replacement decision problem during a finite planning horizon is presented. Multiple alternative challengers to a current defender are considered. All facilities are assumed to have finite service lives. The objective of the DP model is to maximize the profit over a finite planning horizon. As for the cost elements, purchasing cost, maintenance costs and repair costs as well as salvage value are considered. The time to failure is assumed to follow a weibull distribution and the maximum likelihood estimation of Weibull parameters is used to evaluate the expected cost of repair. To evaluate the revenue, the rate of operation during a specified period is employed. The cash flow component of each challenger can vary independently according to the time of occurrence and the item can be extended easily. The effects of inflation and the time value of money are considered. The algorithm is illustrated with a numerical example. A MATLAB implementation of the model is used to identify the optimal sequence and timing of the replacement.

• Nuclear Engineering and Technology
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• 제35권4호
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• pp.286-298
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• 2003

A steam explosion module, STX, has been developed using the mechanistic steam explosion analysis code, TEXAS-V, in order to estimate the dynamic load with steam explosion by implementing the module to the integrated safety analysis code, MELCOR. One of the difficulties in using mechanistic steam explosion codes is that they do not have any obvious criteria for defining some uncertain parameters such as triggering timing, triggering magnitude, mesh axial length and mesh cross-sectional area. These parameters have been user decision parts in the past. Steam explosion sample calculations and sensitivity studies on uncertain parameters were conducted to investigate those uncertain parameters. The TEXAS-V simulations were summarized in the format of a look-up table and a linear interpolation technique was adopted to calculate the steam explosion load between the data points in the table. The STX-module merged with MELCOR showed the same results as the original MELCOR and additionally it could estimate the steam explosion load in the reactor cavity.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2004년도 춘계학술발표대회
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• pp.1485-1488
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• 2004

본 논문에서는 모바일 컴퓨팅 환경에서 자원 예약 때문에 발생하는 자원의 비효율적 사용을 개선시키기 위해서 자원 예약에 필요한 시점을 결정하는 알고리즘을 제안한다. 모바일 컴퓨팅 환경에서의 자원 예약은 향후 셀로 진입할 핸드오프 콜을 위해서 자원을 미리 할당하기 때문에 실제로 사용하지를 않는 자원을 사용하는 것으로 간주한다. 이러한 문제점은 모바일 컴퓨팅 환경에서 자원 효율성을 크게 저하시킨다. 본 논문에서는 인터넷상에서 트래픽을 효율적으로 관리하기 위해서 사용된 혼잡 제어 방법과 유사한 방법을 사용하여 핸드오프 콜의 자원 예약 시점을 결정한다. 그리고 본 논문에서 제안하는 자원 예약 결정 알고리즘은 [2]에서 제안한 이동성 모델을 기반으로 하여 셀 내부 이동 횟수를 기반으로 자원 예약을 결정할 시점을 정한다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송∙미디어공학회 2020년도 하계학술대회
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• pp.593-595
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• 2020

본 논문에서는 5G NR 시스템을 위한 동기 신호를 이용한 cell ID 검출 방법에 대한 성능을 비교하였다. 5G NR(fifth-generation new radio) 시스템의 송신기는 SS/PBCH (synchronization signal/physical broadcast channel) 블록을 송신하며, 수신기는 수신된 SS/PBCH 블록을 이용하여 주파수 및 타이밍 오프셋 (frequency and timing offset)을 추정 할 수 있으며, cell ID (cell identity)는 PSS (primary synchronization signal)와 SSS (secondary synchronization signal)를 통해 검출할 수 있다. 본 논문에서는 cell ID 를 검출할 수 있는 방법으로서 2-stage 디코딩 방법과 결합 최대우도 결정 규칙 (joint maximum-likelihood decision rule: joint ML) 디코딩 방법을 사용하였다. Joint ML 디코딩 방법은 2-stage 디코딩 방법에 비해 더 좋은 검출 성능을 보이지만, 복잡도 측면에서는 2-stage 디코딩 방법이 joint ML 디코딩 방법에 비해 더 낮은 복잡도를 갖는 것을 확인하였다.

• Asia Marketing Journal
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• 제11권2호
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• pp.21-35
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• 2009

In December 5, 2006, "The Economic Times", India's the most famous economy daily newspaper, reported Korea Lotte Mart is planning to enter into India's market. Lotte group, marking number 7^th in Korea's list of conglomerates, established VRIC(Vietnam, Russia, India, China)'s strategy. This strategy is targeted to enter into emerging markets such as Vietnam, Russia, India, China and etc. As of 2007, Lotte Group aggressively is placing its subsidiaries such as Lotte Department Store in Russia and China, Lotte Mart in Vietnam and China and Lotte Confectionery in China and India, into emerging markets. From this case, Based on the assumption of Lotte Mart's India market entry scenario, this study considers various decision-making factors such as market attractiveness evaluation, timing of entry, entry mode, location, scale, positioning, operation strategy, and others, while developing an overseas market entry strategy. This case study also provides India's distribution market environment that Korean companies can utilize when entering into the Indian market in the near future.