• Journal of the Korea Safety Management & Science
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• v.7 no.2
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• pp.13-27
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• 2005

Many countries of the world is driving forward development of large-scale hub port. They are now pushing ahead with setting up of effective marketing strategies to survive in keen competitions of the 21st century port industry. The port is of ever increasing importance for the bridge connecting sea and road transportation in handling international cargoes. The port, differently from general working places, is a closed area required for security, customs, and quarantine procedures. The loading and unloading is being done differently by ports, cargoes, and ships. To do loading and unloading, a lot of equipment and different types of labor are required, which flow is complicated and safe management is essential. As above mentioned the port is very unique and very deteriorated working place in its working environment. The purpose of this study is to propose ways to reduce and prevent from port accidents. As first step to do this, we have collected 923 accidents happened at Incheon Port during the period of 1994 to 2003. We have thoroughly analyzed characteristics, harmfulness, and risk of the loading/unloading they have done, as well as the accident frequency and relationship between the accidents. As second step to further analyze, We have employed DMAIC technology, an advanced process of 6 sigma presently in spotlight as the best program for management innovation. This analysis results in recognition of important accident characteristics, causes and effects analysis, critical causes of accident, and suggestions to decrease accidents.

• Journal of the Korean Institute of Telematics and Electronics C
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• v.35C no.6
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• pp.39-47
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• 1998

A fourth-order $\Sigma$-$\Delta$ modulator is designed and implemented in 0.6 $\mu\textrm{m}$ CMOS technology. The modulator is verified by introducing nonlinear factors such as DC gain and slew rate in system model that determines the transfer function in S-domain and in time-domain. Dynamic range is more than 110 dB and the peak SM is 102.6 dB at a clock rate of 2.8224 MHz for voiceband signal. The structure of a ∑-$\Delta$ modulator is a modified fourth-order ∑-$\Delta$ modulator using direct feedback loop method, which improves performance and consumes less power. The transmission zero for noise is located in the first-second integrator loop, which reduces entire size of capacitors, reduces the active area of the chip, improves the performance, and reduces power dissipation. The system is stable because the output variation with respect to unit time is small compared with that of the third integrator. It is easy to implement because the size of the capacitor in the first integrator, and the size of the third integrator is small because we use the noise reduction technique. This paper represents a new design method by modeling that conceptually decides transfer function in S-domain and in Z-domain, determines the cutoff frequency of signal, maximizes signal power in each integrator, and decides optimal transmission-zero frequency for noise. The active area of the prototype chip is 5.25$\textrm{mm}^2$, and it dissipates 10 mW of power from a 5V supply.

• Journal of the Korea Safety Management & Science
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• v.13 no.2
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• pp.243-249
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• 2011

The purpose of the study was to improve of performance for Magnetic Resonance Imaging (MRI) examination in the department of radiology. It was performed DMAIC (Define, Measure, Analyze, Improve, and Control). In the stage of definition, The fifth kinds of CTQ (critical to quality) by the kindness, the waiting time, the examination explanation, the waiting time and the waiting environment were selected by voice of customer. In the stage of measurement, the performed examinations and the reservation waiting time were measured each 1.77 and 1.69 sigma. In the stage of analysis, the potential key causes were determined the limited working hours and the difference of examination time of various entries. In the stage of improvement, MRI were performed with the operating system of 24 hours examination and the optimization of the difference of examination time by among of 30 minutes, 40 minutes, 50 minutes. Finally, the number of examinations and reserved waiting days were measured by each 3.17 and 1.71 sigma in the control stage.

• Journal of Digital Convergence
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• v.10 no.6
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• pp.141-152
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• 2012

This study is a comparatively analyzes innovation tools for developing appropriate business models according to the types of convergence. Firstly, it examines previous studies on the type of convergence, business models, and innovation tools. Based on the understanding of each topic through literature search, it introduces Convergence-Business-Innovation Tools Cube (CBI Cube) model with the concept of developing innovative business models by applying innovation tools under the condition of convergence. In order to quantify (concretize) the concept, we have compared the relative priority of innovation tools for developing business models to find component factors of CBI Cube model through the survey of an expert group by adopting DelPhi method and AHP method. From the result of this study, we expect to be able to make an easier approach to the development of innovative products, services and market as it allo ws to develop business models of value innovation beyond just benchmarking or simple imitation of existing business models.

• Korean journal of food and cookery science
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• v.24 no.6
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• pp.818-828
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• 2008

A recurrent theme within the literature on the 6 Sigma program is the study of its effect on organizational performance. Therefore, the aim of this study was to investigate the effect of 6 Sigma on culinary quality performance, work commitment, and customer loyalty in the culinary division of hotels and family restaurants. The samples of this study included the employees of the culinary division of hotels and family restaurants that implemented or were about to implement the 6 Sigma program. A total of 248 questionnaires were analyzed with statistical methods of factor analysis, reliability test, and regression analysis. The findings of this study showed that the 6 Sigma program affected the culinary quality performance and work commitment of culinary division employees. Also, the 6 Sigma program, culinary quality performance and work commitment affected customer loyalty. Furthermore, work commitment affected culinary quality performance. Based on these research findings, it is required that the culinary division of hotels and family restaurants should incorporate the 6 Sigma program. For this purpose, good quality data should be collected with sufficient preparation procedures, and task force team should be made. Moreover, experts in this field should be cultivated, with the training of employees in mind. It is also crucial that the current quality of product and services be measured and that all the employees of the culinary division participate in the implementation of the 6 Sigma program. The intervention and heavy participation of the top management and head of the culinary division is expected for the successful implementation of 6 Sigma program.

• Journal of the Korean Society of Food Culture
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• v.24 no.5
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• pp.506-517
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• 2009

This study was conducted to investigate the effects of 6 Sigma on menu management, work commitment and quality in the culinary division of hotels and family restaurants. In addition, this study sought to identify the effects of menu management, work commitment and quality performance on customer satisfaction. Furthermore the relationship between menu management and culinary quality was evaluated here. The subjects evaluated in this study were employees of culinary division of hotels and family restaurants that implemented or were about to adopt the 6 Sigma program. A total of 385 questionnaires were analyzed using factor analysis, a reliability test, and covariance structural analysis. The results revealed that the 6 Sigma program influenced menu management, work commitment and culinary quality. Moreover, menu management, work commitment and culinary quality performance were found to impact customer satisfaction and culinary quality performance. Based on these findings, culinary divisions of hotels and family restaurants should incorporate the 6 Sigma program as soon as possible. To implement this program, faultless data for the 6 Sigma program should be collected using sufficient preparation procedures. After the data were collected, a task force team should be developed, experts should be cultivated and employees should be trained as necessary. Finally, the current level of product and services should be measured and reported to all employees in the culinary division and a challenge spirit should be brought with understanding for the reason for implementation of the 6 Sigma program. In implementing the 6 Sigma program, the leadership of the top manager and the head of the culinary division is very important.

• Journal of the Korean Society of Industry Convergence
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• v.15 no.1
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• pp.13-19
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• 2012

Due to a low stiffness of cranktrain and a failure experience from a history within short development time, a viscous torsional vibration damper was applied in order to reduce the torsional vibration and keep the high reliability for the durability of cranktrain system in the direct injection diesel engine. As an improvement of the crankshaft stiffness by increasing the diameter of main and pin journal, a rubber type damper could be considered. In this study, the control factors of rubber damper, the moment of inertia ring, stiffness of damper and damping coefficient of ring, were investigated by DFSS method through the analysis work and the measurement in the real engine condition.

• The Inventors News
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• no.54
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• pp.1-16
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• 2007

한국여성경제단체연합, 여성경제계 위해 공식 출범/발행인 칼럼/'마드리드 출원제도' 적극 활용 상표 침해 줄여라/일본 특허출원 심사기간 단축된다/기업.연구소 신입사원75%, 특허 관련 지식 전무/'주몽'이계인 씨 산자부 홍보대사 위촉/특허등록세, 신청 다음날 내도 된다/특허청, 6시그마 공공부문 혁신 주도/아듀 2006 한국여성발명협회 결산/자문위원 칼럼/로봇시장에도 브랜드 선점 열풍/농산물도 발명특허 상표 등록 시대/도소매업도 서비스업으로 출원 가능/기름대신 물 사용한 자동차, 항공기 현실화/반도체 배선 기술 특허 출원 상승세/자동차는 모바일 엔터네이너/'적외선 감지기술' 우리 생활속으로/서울반도체.바론테크, 일본 특허분쟁 승소/하나TV, 특허권 침해 피소/삼성전자, 분쟁.경쟁 대응위해 특허조직 통합/신한다이아몬드 일본 MDI 특허분쟁 승소/미니인터뷰/나노기술 응용한 디스플레이 특허출원 급증/미국의 두 배인 '휴면 특허', 대책 마련 시급/특허법원 "사용횟수 적다고 상표취소 못해"/종자번식 유전자 변형식물도 특허출원 가능/변리사 1차 시험 합격자 대폭 축소/역사 속의 발명품/하루 10분 발명교실/특허Q&A/신년인터뷰/화장하는 방법도 특허 받는다/'취업에서 결혼까지' 올인원 시스템 화제/아이디어 착상 및 발명 기법/아줌마의 힘이 발휘될 때까지 발명 또 발명/버뱅크의 식물 품종 개량/미국 청년, 몸짱 선탠용 티셔츠 발명/스위스, 국가경쟁력 1위의 비밀/저지방식,'유방암' 제발 위험 감소/서울대, 세계최초 암캐 복제 성공/국가 R&D 특허조사, 전체 R&D 부처로 확대/전국 초.중생 발명 글짓기.만화현상 공모전/특허청, 공공부문 성과주의 대통령상/한국여성발명협회 회원사 발명품 가이드

• Transactions of Materials Processing
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• v.14 no.9 s.81
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• pp.798-803
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• 2005

In this paper, the six sigma scheme together with the rigid-viscoplastic finite element method is employed to obtain the optimal metal flow lines of a hot forging according to the six sigma processes, i.e., five steps such as define, measure, analyze, improve and control. Each step is investigated in detail to meet customer's requirements through improvement of product quality. A forging simulator is used for analysis of the metal flow lines of the hot forging, manufactured by a hot press forging machine, under various conditions of major factors determined at each step. The analyzed results are examined in order to reveal the effects of major factors on the metal flow lines and the formed shapes. The effects are then used to find an optimal process and the optimal process with die is devised and tested. The comparison between the required metal flow lines and the experiments shows that the approach is effective for optimal process design in hot forging considering metal flow lines.

• Korean Journal of Oriental Medicine
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• v.12 no.2 s.17
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• pp.85-92
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• 2006

Pulse is one of the basic diagnostic information of TKM(Traditional Korean Medicine). To quantify and standardize pulse diagnosis, we had collected an amount of clinical data from May 2005 by using newly developed pulse analyzer. But there were many noises in pulse wave according to measuring method, environment, operator and condition of patient. So some data can’t be included for analyzing diagnosis. To reduce noises from measuring pulse and to collect reliable pulse wave data, we made the process map of measuring method and applied six sigma project. With this we can improved the method of measuring pulse wave in collecting clinical data. The project follows a disciplined process of five macro phases: define, measure, analyze, improve and control (DMAIC). A process map and C-E diagram are used to identify process input and output variables. The major input variables are selected by using C&E matrix, and process map is developed by analyzing input variables. And the optimum process conditions are going to be controled to avoid in increasing loss of collecting pulse wave data.