• 한국음향학회지
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• 제6권1호
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• pp.58-65
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• 1987

현재 국내에서 사용되고 있는 교환기의 주요 가청신호음인 발신음. 화중음 및 호출음은 CCITT권고에 합당하지 않은 경우가 있고, 합척음인 경우 협화가 이루어지지 않아 청각적인 쾌미감을 갖지 못하며, 또한 교환기종마다 서로 상의한 신호음을 사용함으로써 전화가입자 혼동의 우려가 있으므로, 가청신호음을 새로이 통일할 필요가 있다. 본 논문에서는 CCITT권고 Q35와 청감의 쾌미감을 고려한 새로운 가청신호음을 제안한다. 제안된 가청신호음은 주파수를 400Hz 단일음으로 하고, 각 신호음 사이에 독특한 단속주기를 주어 구별할 수 있도록 하였으며 신호음은 디지탈 교환망에서도 사용이 가능하도록 신호음을 ROM방식으로 발생시키는 방법을 제시한다.

• 한국국방경영분석학회지
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• 제34권1호
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• pp.13-30
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• 2008

본 연구에서는 외국의 국방표준화 정보관리 발전동향을 살펴보고 우리나라 현 실태를 분석한 후 민수-국방분야에 공통 적용가능한 규격/표준 공통 분류목록의 제정과 이를 바탕으로 한 표준화 정보기반 통합DB의 구축 및 국방표준화 정보체계의 구축방안을 제시하였다. 규격/표준 공통 분류목록은 국방규격과 한국산업표준의 그룹핑을 통해 표준화 대상식별에 관한 보다 효과적인 방법을 제시하였으며, 표준화 정보기반 통합DB 구축을 통해 규격/표준과 다양한 정보들과의 상호참조 기반을 제공하였고, 표준화 정보체계를 통해 민수-국방분야 전반에 걸친 규격/표준정보 활용의 토대를 제시하였다.

• 항공우주시스템공학회지
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• 제6권2호
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• pp.23-27
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• 2012

The evaluation of simulation models against ADS-33 quantitative rotorcraft handling qualities metrics has, in the past, been a time consuming effort, involving many individual analyses in both the time and frequency domains. Manual tuning of control system parameters to meet handling qualities and performance specifications has been cumbersome and complicated. Performing rigorous trade-off studies for numerous variations in the control system is too time consuming to be practicable. With the complex interaction of time- and frequency based specifications for the closed- and broken-loop responses, it is difficult to know if the design makes the most effective use of the available control power. The Control Designer's Unified Interface (CONDUIT) software makes possible rapid optimization and trade-offs of design configurations against handling qualities specifications.

• 한국시뮬레이션학회논문지
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• 제6권1호
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• pp.25-40
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• 1997

This study deals with an autonomous generation of simulation codes for the design of processes of c CIM system based on the concept of model transformation. We assume we have a functional model of an organization which is developed using the well-known IDEF0 methodology. Then, a modeling methodology, called PROWD(PRocess flOW Description), is suggested to develop the flow processes of the organization. To Derive simulation specifications for the transformed PROWD model, we define a module of a "unit system" for each activity of PROWD model. Then specifications for system entities and resources are derived from input/control/mechanism/output and entity flows of PROWD model. Entitiy queues are defined from the sates and events of unit systems. Finally, SIMAN model frame is generated from those specifications through a suggested algorithm. The implementability and validity of the proposed approach is tested by developing a prototype of a computer-assisted design system on the operation processes of FMS installed at SNU-ASRI (Seoul National University-Automation and Systems Research Institute).nstitute).

• 패션비즈니스
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• 제8권1호
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• pp.1-15
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• 2004

The purpose of this study is to provide for some basic data useful to production of the apparels fit and measured well for the Chinese men. For this purpose, Chinese men's apparel measurements and specifications were determined per area group(Beijing/ Shanghai) according to the Men's Wear Specifications (GB/T 1335.1-1997), National Standards of People's Republic of China. The collected data were statistically processed using SAS 6.12 for technical statistical analysis, correlation analysis, factor analysis, group-wise analysis and ANOVA. The results of this study can be summarized as follows; 1. As a result of dividing the Chinese men into Beijing and Shanghai men and thereby, setting height and upper chest circumference for upper garments and height and waist for lower garments. 2. Analyzing the correlations according to the three-fold classifications of height/upper chest circumference/waist for garment specifications, 17 specifications based on heights and upper chest circumferences for Beijing men's upper garments could be designed within the deviation level of 2%, while 15 specifications based on waist measurements could be designed (between $70{\sim}98cm$) for their lower garments within the deviation level of 4%. Thus, a total of 60 combinations of the specifications could be obtained. 3. 16 specifications based on heights and upper chest circumferences for Shanghai men's upper garments could be designed within the deviation level of 2%, while 16 specifications based on waist measurements could be designed (between $68{\sim}98cm$) for their lower garments within the deviation level of 3%. Thus, a total of 56 combinations of the specifications could be obtained. For other reference measurements, grading measures were set for each type and body part, while the average measures of major body parts were calculated.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 합동 추계학술대회 논문집 정보 및 제어부문
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• pp.67-70
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• 2002

This paper presents an optimal robust LQ-PID controller design method for a second order system with time-delay to meet design specifications. By LQR formulation of the second order system with time-delay, tuning parameters of PID controller are related by the weighting factors Q and R of cost function. The selection of the weighting factors Q and R are chosen to satisfy such the design specifications as overshoot and settling time.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2006년도 하계종합학술대회
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• pp.225-226
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• 2006

A service level agreement (SLA) is a formal contract between a service provider and a subscriber that contains detailed technical specifications called service level specifications (SLSs). In this paper, we propose SLA data analysis system which provides an effective decision-making information to network service provider. The SLA data analysis system executes trend analysis and statistics analysis using SLA violation and refund information. The analysis results are presented in many ways such as tables, graphs.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.54.3-54
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• 2001

This paper presents a controller design technique for standard 2nd-order system satisfying user-specified phase margin. A simple method is presented to meet stability margin for the 2nd-order system, which is important since the 2nd-order plant models are frequently encountered in the practical plant models such as actuators of the optical drive systems. Through the comparison of the specified stability margin and achieved stability margin, it is shown in the simple example that the proposed technique is useful in the initial design of control systems with stability margin specifications.

• 한국자동차공학회논문집
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• 제21권4호
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• pp.144-152
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• 2013

PRT(Personal Rapid Transit) system is a new transportation system which will meet increasing demands of traffic in Korea. It is also an environment-friendly transportation and automatically operated. For these reasons, researches on the PRT system are actively undergoing, but the PRT vehicles have different forms of subway, bus, etc. There are no design standards to evaluate structural integrity, yet. In this paper, Structural design specifications are derived, which are based on the performance test standard for EMU and the ASCE-APM standards. We also perform the static and fatigue analyses by FE simulation and suggest strategies to improve an initial structure design. In addition, we derived the design specifications for energy-absorbing structures to meet the conditions of the collision scenarios predefined from a view point of operation safety.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2001년도 학술대회지
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• pp.501-506
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• 2001

건설공사의 계약문서에는 설계도면, 공사시방서 등이 포함되나, 국제적인 수준의 계약문서로서 다소 미흡하게 작성되었던 것이 사실이다. 이러한 문제점을 해결하기 위하여 '98년 1월부터는 설계도서 작성시 공사시방서를 작성하도록 하였다. 그러나 제도의 도입초기이므로 참고할 만한 자료도 충분하지 않으며, 작성경험 및 능력도 부족한 실정이다. 이러한 점을 보완하기 위하여 개발된 기존 시스템은 네트워크를 고려하지 않아 시스템 활용과 유지관리 및 갱신에 한계가 있다. 본 연구에서는 기존 시스템을 개선하여, 전문시방서, 설계기준, 하위기술기준 둥 건설공사기준 DB를 구축하고, Web을 통해 구축된 DB를 검색·활용하여 공사시방서를 실시간으로 작성하는 시스템 개발 방안을 제시하였다. 이러한 시스템은 공사시방서 작성시, 표준시방서, 전문시방서 등 다양한 정보를 조회하여 수준높은 공사시방서를 작성하는데 일조할 것으로 기대된다.