• Journal of the Korea Safety Management & Science
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• v.16 no.1
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• pp.169-176
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• 2014

This research discusses the characteristics and the implementation strategies for two types of quality metrics to analyze innovation effects in six sigma projects: fixed specification type and moving specification type. $Z_{st}$, $P_{pk}$ are quality metrics of fixed specification type that are influenced by predetermined specification. In contrast, the quality metrics of moving specification type such as Strictly Standardized Mean Difference(SSMD), Z-Score, F-Statistic and t-Statistic are independent from predetermined specification. $Z_{st}$ sigma level obtains defective rates of Parts Per Million(PPM) and Defects Per Million Opportunities(DPMO). However, the defective rates between different industrial sectors are incomparable due to their own technological inherence. In order to explore relative method to compare defective rates between different industrial sectors, the ratio of specification and natural tolerance called, $P_{pk}$, is used. The drawback of this $P_{pk}$ metric is that it is highly dependent on the specification. The metrics of F-Statistic and t-Statistic identify innovation effect by comparing before-and-after of accuracy and precision. These statistics are not affected by specification, but affected by type of statistical distribution models and sample size. Hence, statistical significance determined by above two statistics cannot give a same conclusion as practical significance. In conclusion, SSMD and Z-Score are the best quality metrics that are uninfluenced by fixed specification, theoretical distribution model and arbitrary sample size. Those metrics also identify the innovation effects for before-and-after of accuracy and precision. It is beneficial to use SSMD and Z-Score methods along with popular methods of $Z_{st}$ sigma level and $P_{pk}$ that are commonly employed in six sigma projects. The case studies from national six sigma contest from 2011 to 2012 are proposed and analyzed to provide the guidelines for the usage of quality metrics for quality practitioners.

• Proceedings of the IEEK Conference
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• 2003.07a
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• pp.186-189
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• 2003

This paper discussed whole concept of bluetooth baseband and studied its detail algorithm. Important blocks, access code, security and clock management, are implemented and verified to hardware and firmware according to Specification ver.1.1. Then implementation results are compared and examined. Finally, this paper suggested the efficient system implementation method. By using test board, it could confirm that suggested implementation communicated smoothly.

• 전기의세계
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• v.26 no.6
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• pp.41-47
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• 1977

The paper deals with the fundamental specification for the physical implementation of interface circuit, which will play an important role in information and signal trammission between computer and controlled system, and also we have proved that the digital contoller will be able to improve the data handling of interface circuit.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.2
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• pp.469-478
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• 2000

On the advent of digital era, ECDIS has emerged as a new navigation aid that should result in significant benefits to safe navigation. More than simply a graphics display, ECDIS is a new concept navigation system capable of providing integrated information of geographical and texual data. As an official vector data for ECDIS, ENC consists of spatial and feature data to describe objects in form of points, lines and areas. IHO published International Standards for ENC, such as S-52(Specification for Chart Content and Display Aspects of ECDIS) and S-57(IHO Transfer Standard for Digital Hydrographic Data). This paper deals with the implementation of an ENC representation system which meets S-52 presentation specification and S-57 transfer standards by analyzing S-57 data structures and converting them to an appropriate internal data structures and representing them onto screen adopting S-52 presentation specification.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1999.11a
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• pp.146-150
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• 1999

On the advent of digital era, ECDIS has emerged as a new navigation aid that should result in significant benefits to safe navigation. More than simply a graphics display, ECDIS is a new concept navigation system capable of providing integrated information of geographical and texual data. As an official vector data for ECDIS, ENC consists of spatial and feature data to describe objects in form of points, lines and areas. IHO published International Standards for ENC, such as S-52(Specification for Chart Content and Display Aspects of ECDIS and S-57(IHO Transfer Standard for Digital Hydrographic Data). This paper deals with the implementation of an EUC representation system which meets S-52 presentation specification and S-57 transfer standards by analyzing S-57 data structures and converting then to an appropriate internal data structures and representing them onto screen adopting S-52 presentation specification.

• Journal of Internet Computing and Services
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• v.5 no.6
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• pp.67-77
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• 2004

In this paper, we implement the multimedia dynamic authoring system based on causality model. we define two specifications which support user to specify intuitively and naturally what he/she wants, The temporal specification describes causal-based temporal relationships between presentation objects, and the spatial specification describes relative layout structure among objects on the screen. Using the specifications, the system processes for multimedia documentation are one-dimensional string list, relational trees, such as temporal. spatial, and annotated composition tree generation phases.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.11
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• pp.2062-2068
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• 2006

In his paper, embedded system implementation for IEEE802.l1p based OFDM-DSRC is presented. After the IEEE802.11p physical layer specification is introduced and BER performance of the modem is evaluated by simulation, implementation aspects of the system such as system architecture, design method and implementation results are addressed. Implemented embedded system for the OFDM-DSRC communication consists of FPGA, flash memory, ARM9 CPU Core, peripherals, etc. from the results, it is shown that the implemented system operates well according to IEEE802.11p specification. It is expected that implemented embedded system shall be used for wireless communication system such as ITS application by enhancing system optimizing.

• Journal of Advanced Navigation Technology
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• v.16 no.1
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• pp.54-61
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• 2012

The WAVE specification, which for the Next-Generation ITS environment is a common title: IEEE 802.11p and IEEE P1609 specifications. These days, there are many activities for researching WAVE specification by release of the IEEE 802.11p specification. The difference between high-speed vehicle environment and the indoor environment, the wireless communication channel mode is that much more severe. Thus, the wireless communication system design, temperature, noise, multipath fading and can degrade the performance of the system points should be fully considered matters of. In this paper, we showed WAVE wireless communication system which based on IEEE 802.11p PHY/MAC design process, and also showed solving process many implementation problems.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05b
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• pp.800-803
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• 2004

This paper describes the design and implementation of the T=1 protocol based on lava Card. The T=1 protocol implemented in this paper complies with ISO/IEC 7816 standard. Also, JCOS(Java Card Operating Systems) including the contactless card protocol conforms to Java Card 2.2.1 specification and is running on 32-bit ARM7/TDMI processor. The protocol stack proposed and implemented in this paper is easy to maintenance of protocol independently. To verify the T=1 protocol implemented in this paper we tested the T=1 protocol scenarios defined in ISO/IEC 7816-3 Annex A. And we tested using USIM(Universal Subscriber Identity Module) cards, which include the implemented T=1 protocol. The T=1 protocol was tested and passed all against the specification 3GPP TS 31.122, which was the Conformance Test Specification for USIM cards including the test suites of both transmission protocols.

• Proceedings of the IEEK Conference
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• 2000.06a
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• pp.101-104
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• 2000

The Current CORBA has many drawbacks to be deployed successfully in real-time system applications. Recently, OMG adopted Real-Time CORBA specification. In this paper. we report our efforts of a design and implementation of Priority Model of Real-Time CORBA spec., which is one of the most important components in Real-Time CORBA spec. The improvement of real-time performances of our implementation is verified by expereiments.