• Proceedings of the Acoustical Society of Korea Conference
• /
• 1994.06c
• /
• pp.214-217
• /
• 1994

The major drawback in the Code Excited Linear Prediction type vocoders is their large computational requirements. In this paper, a simple method is proposed to reduce the pitch searching time in the pitch filter almost without degradation of quality. On the basis of the observational regularity of the correlation function of speech, only the limited numbers of pitch lags are considered to be an optimum pitch. This is done by skipping the negative envelope side of the correlation function and limiting the maximum number of lags to be considered preliminarily. By doing so, we can reduce the computational time of pitch searching more than 51% with negligible quality degradation. In addition to that, by combining that method with the conventional delta search technique, we can reduce the computational time requirements more than 60% without serious lowering the speech quality in segmental SNR measure compared to the conventional full search method.

• International journal of advanced smart convergence
• /
• v.3 no.2
• /
• pp.18-21
• /
• 2014

A control application requirements currently used is very low, such as packet loss rate, minimum delay on sensor networks with quality of service (QoS) requirements some packet delivery guarantee. This paper is the sampling period at the end of the actuator and sensor data transfer related to the Miss ratio for each source sensor node, use the controller and the internal ANFIS. The proposed scheme has the advantages of simplicity, scalability, and General. Simulation results of the proposed scheme can provide QoS support in WSANs.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2008.10a
• /
• pp.43-46
• /
• 2008

This study investigated if a requirement for screen gloss is needed in the TCO Requirements and was, therefore, targeted towards finding an acceptable reflex level. The results show that a glossy surface has an impact on the visual ergonomics, and for this reason we believe that a requirement is needed. Although, the results do not point to a single value that is better than another, so a selection for a requirement level has to be augmented with additional information. Such a discussion is given and 60 gloss units at 60 degrees ($GU_{60}$) was selected as the new requirement level for the TCO Requirements (TCO '03 and TCO '05).

• Journal of the Ergonomics Society of Korea
• /
• v.17 no.3
• /
• pp.71-80
• /
• 1998

This study proposed a method to apply certain fuzzy-related Quality control concepts to design customer-oriented products considering user requirements and information starting with the product development stage. This approach showed how to define the importance level of design elements and how to Quantify complex subjective perception of products using the fuzzy linguistic rating method and quality function deployment concepts. Using this approach, various customer requirements could be interpreted and reflected on the early design phase of a new product. To validate the proposed method, an experiment was conducted for designing the shape of the beeper using 14 subjects and 10 commercial beeper products. Front area, width/length ratio, thickness, curve variance, weight, and display area were selected as design elements of the beeper. The results showed that among design elements, front area and weight are significantly related with the subjective perception of the products. Consequently, this study indicates that customer decision on product selection could be made by quantification of user perception for beeper products.

• Journal of Korean Society for Quality Management
• /
• v.33 no.1
• /
• pp.11-21
• /
• 2005

Providing female students with competitive advantages in their social activity became one of the important issues of the college education in Korea. Thereupon, for the purpose of more effective and systematic support for the female students, many universities have adopted the cyber mentoring system. However, customers' requirements for such cyber mentoring systems are not reflected at the initial stage, resulting in some inefficient performances. In this study, we propose a desirable cyber mentoring system reflecting female students' requirements by using QFD and conjoint analysis. We expect that the proposed system will help to cultivate high quality female resources in a more effective way.

• Journal of Institute of Control, Robotics and Systems
• /
• v.7 no.7
• /
• pp.574-581
• /
• 2001

In this paper we design and evaluate the longitudinal nonlinear N(aub)z-CSAS(Command and Stability Augmentation System) flight control law in \"DMI(Dynamic Model Inversion)-method\" and classical \"Gain Scheduling-method\", respectively, to meet the handling quality requirements associated with push-over pull-up maneuver. It is told that the flight control law designed in \"DM-method\" is adequate to the full flight regime without gain scheduling and is efficient to produce the time response shape desired to the handling quality requirements. On the contrary, the flight control law designed in \"Gain Scheduling-method\" is easy to be implemented in flight control computer and insensitive to variation of the actuator model characteristics.n of the actuator model characteristics.

• KIPS Transactions on Software and Data Engineering
• /
• v.9 no.7
• /
• pp.205-212
• /
• 2020

Defects are an important factor in the quality of software developments. In order to manage defects, we propose additional information of search and classification. Additional information suggests a systematic classification scheme and method of operation. In this study, we propose additional information at the requirements analysis stage for defect management.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.23 no.54
• /
• pp.97-110
• /
• 2000

As more and more companies pursue ISO 9000 certification, one of the most misconceptions about ISO 9000 is that registration is necessary only for business. ISO 9000 is being driven by commercial requirements, not legal fiat. This registration can be used as evidence of compliance to the ISO 9000 to satisfy specific customer requirements. The primary objective of this research is to provide the efficient implementation process of ISO 9000 certification on the basis of total quality management concerning with ISO/CDl 9001:2000, ISO/CDl 9004:2000 and ISO/CD2 9001:2000. Based on the result of first paper in May 1999, this study has been conducted using the data collected from 312 manufacturing companies which registered ISO 9000 certification. This analysis can be applied to Korean small and medium industrial companies in establishing and maintaining the development of qualify systems. The companies should be able to benefit if they make continuous effort to improve the quality activities based on the factors suggested in this paper.

• International conference on construction engineering and project management
• /
• 2009.05a
• /
• pp.1075-1080
• /
• 2009

Recently, the building construction industry has been forced to cope with lack of skilled labor. A robot-based construction automation system should help overcome crucial troubles which may be caused by this phenomenon. In particular, it is vital to propose design for automation (DFA). Quality function deployment (QFD) is applied a systematic aid in determining the design reflecting customer's needs. This study employs the QFD approach to plan the component designs of an effective automation process, and presents the development process of DFA with an illustrative project. As a result, the study identifies the developers' design requirements for automated construction and weights them by their importance indices.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 2003.11a
• /
• pp.267-270
• /
• 2003

The quality assurance activities are important to obtain the safety and reliability in decommissioning of research reactor. It is essential to establish and implement effective quality assurance program. Foreign state-of-the-art standards and practices of quality assurance are investigated and analyzed to select quality assurance requirements. In this paper, guidelines are offered a suggestion to establish optimal the technology standard and lay out the managerial control scheme of quality assurance for decommissioning on research reactor.