The purpose of this study was to quantitatively evaluate the effects of the secondary task with unexpected situation during simulated driving using the variable indicating control of vehicle. The subjects were participated 50s people including 15 males with 29.5±6.7 years of driving experiences and 15 females with 20.1±5.6 years of driving experiences. All subjects were instructed to keep a certain distance (30m) from the car ahead and a constant speed (80km/hr or 100km/hr). Sending text message(STM) and Searching navigation(SN) were selected as the secondary task. Experiment consisted of driving alone for 1 minute and driving with secondary task for 1 minute. It was defined driving phase and unexpected situation phase respectively. Medial-lateral coefficient of variation(MLCV) of car movement was analyzed for evaluating lane keeping in this study. In the results, MLCV was increased by 118.3% at 100km/hr. In the case of secondary task, MLCV in STN and in SN were increased by 235.1% and 290.3%, respectively. There was no significant difference between male and female. In case of driving at high-speed and with secondary task, it may be disturbed constant control of the vehicle when unexpected situation appeared suddenly.
심정지 환자의 생존율은 1분이 경과할 때마다 10%씩 감소한다. 우리나라는 2008년에 응급의료 관련 법률을 제정하여 대중이 모이는 공공장소에 자동제세동기를 설치하도록 하였다. 심정지환자가 발생될 경우 1차 발견자가 즉각적인 심폐소생술을 실시하고 자동제세동기를 사용할 때 최선의 성과를 얻을 수 있다. 그러나 국민 전체의 심폐소생술 교육경험과 심폐소생술 실시 의지는 매우 적어서, 응급구조사가 도착할 때까지 시급한 조치가 연기되는 실정이다.
본 연구에서는 심폐소생술 교육유무, 심폐소생술의 실시, 정확한 실행과 자동제세동기의 활용 등을 기존연구 자료를 바탕으로 시뮬레이션을 수행하여 효과적인 응급의료체계를 위한 제언을 한다.
세계는 무선통신 기술의 발달로 휴대용 모바일 폰의 형태도 단순 무선통신을 하는 휴대폰에서 휴대폰과 개인휴대단말기(personal digital assistant; PDA)의 장점을 결합한 것으로 일정관리, 팩스 송수신 및 인터넷 접속 등의 데이터 통신기능을 통합시킨 스마트폰이 출시되었다. 이 스마트폰은 완제품으로 출시되어 주어진 기능만 사용하던 기존의 휴대폰과는 달리 수백여 종의 다양한 애플리케어션(응용프로그램)을 사용자가 원하는 대로 설치하고 추가 또는 삭제할 수 있는 특징을 가지고 있다. 이에 모바일 폰의 사장도 노키아와 삼성 중심의 휴대폰 시대에서 애플의 독주와 삼성전자 등이 뒤를 쫒고 있는 스마트폰 시대로 전환하였다. 스마트폰의 편리성, 기능성 등을 이유로 많은 고객들이 고가임에도 불구하고 스마트폰을 구입하고 사용하기 시작하였다. 하지만 몇몇 사용 중 기능고장 등으로 인한 애프터서비스의 부실로 고객의 불만이 상승하고 있다. 이에 본 연구에서는 기존 핸드폰과 스마트폰의 애프터서비스 품질 구성요인을 분석하고, 고객감동 요인, 고객만족 요인, 고객불만해소 요인의 존재 및 차이 여부를 평가하고, 나아가 이 품질 구성요인이 고객만족과 기업성과에 미치는 영향도를 분석하고 평가함으로써 기존 핸드폰 시장에서 애프터서비스 전략과 스마트폰 시장에서 애프터서비스 전략이 어떻게 차별화 되여야 하는지에 대한 방향을 제시하고자 한다.
기업가선택을 높이는 요인들 중 인적자본가설은 다양한 지식축적을 통해 기업가가 되고 이는 소득을 높인다고 주장하는 반면 기호가설은 다양한 활동에 대한 기호 때문에 기업가가 되지만 예상소득이 피고용 상태보다 저조할 것으로 본다. 기술기업의 경우 전문성에 대한 이득이 커서 이러한 효과들은 약화될 수 있다. 이민의 경우 고용차별압력에 의한 자영선택가능성도 증가할 수 있다. 의료를 제외한 과학기술직의 자영업을 기술기업가로 보고 이의 소득방정식을 미국 인구센서스 데이터에 대해 추정하여 기업가 이론중 인적자본 가설과 기호가설, 차별요소, 선택편이를 비교추정 하였다. 특히 미국 기술기업 내 비중이 커지고 있는 아시아인을 백인집단과 비교하여 소득을 분해 비교하였다. 기업가선택에 대한 인적자본가설이나 자기선택에 의한 경쟁적 가설보다는 떠돌이 가설의 가능성이 크게 보인다.
MES(manufacturing execution system)란 생산을 수행하기 위해 사용되는 방법과 도구들을 포함하는 온라인 통합 생산 시스템으로 주문 받은 제품을 최종제품이 될 때까지 생산 활동을 최적화 할 수 있는 정보를 제공하며 정확한 실시간 데이터로 공장 활동을 지시하고, 대응하고, 보고 한다. 이에 따라, 공장에서 가치를 제공하지 못하는 활동을 줄이는 것과 함께 변화에 빨리 대응할 수 있게 함으로써 공장 운영 및 공정의 효과를 높인다. 또한 납기, 재고회전율, 총수익, 현금 흐름 등을 개선 할 뿐 만 아니라 운영 자산에 대한 회수율도 좋게 하며, 양방향 통신으로 기업 전체 및 Supply Chain에 걸쳐 생산 활동에 대한 중요한 정보 들을 제공한다.
선행적 관리는 대응적(active), 예방적(preventive), 예측가능(predictive)으로 이루어진다. 선행적 관리가 MES에 포함되어 구성된 System 설계를 본 연구에서 제안했고, 이에 대한 기존의 MES와의 차별성 및 효율성에 대한 것을 검증했다.
In this study, a reliability analysis method is discussed for the evaluation of the withdrawal ratio of non-repairable items to the normally working items of a controller product model. Although the analysis method is rather straightforward, one can estimate the probability of withdrawal and present the management a useful information on the appropriateness of the warranty period, exploiting the collected data, which is commonplace in the industrial site. For the methodology is to be refined, more systematic collection of data and adoption of more sophisticated analysis method are yet to be desired.
Light emitting diode(LED) plays important role in illumination applications such as general lighting, automotive, and outdoor lights due to their high reliability and energy saving elements. The long lifetime is one of the main advantages of LED and thus, the Accelerated Life T(ALT) is used to help achieving the target life time. This paper presents the investigation of ALT models and failures for LED in recent literatures. LED reliability improvement technologies will be discussed finally.
The objective of this research is to analyze the effect of quality management system constructed by ISO 9001 certificates through BSC perspectives. Evaluation of quality management system based on BSC framework can consider short-term financial performance as well as nonfinancial performance characteristics, which will derive future financial results. This results show that QMS has an indirect effect on business performance through quality performance and customer satisfaction, which are internal business process and customer perspective, rather than has a direct effect on financial performance. Finally we suggest implications of this study and future research direction.
It is well known that ISO 9001 and TQM have significant effects on business success. We analyzed the effects of ISO 9001 requirements and TQM on financial performance with Structural Equation Modeling. Hypotheses are proposed and tested based on existing beliefs, proposition and prior research concerning quality. Survey data were collected from 291 manufacturing companies with ISO 9001 certifications. The data show that ISO 9001:2008 requirements have significant positive direct effects on TQM practices, but do not have positive direct effects on financial performance. As expected, TQM has significant positive direct effects on financial performance. One of the important results is that efforts to meet ISO 9001:2008 requirements enhance TQM practices which, in turn, helps to improve financial performance. Findings in this study support the claims that ISO 9001:2008 would be a good step toward total quality management and is a meaningful component of TQM.
The binomial option pricing model is widely used to understand pricing an option which is a financial derivative. The Model presents very important characteristics in deciding a price of an option. First, a value of option is decided independently with probabilities that stock prices are ascending or fall. Second, an option pricing is not depend on investors' risk preferences. When an option is evaluated, this paper may clear that investors had to consider the probabilities of a stock price's movements and their own preferences for a risk.
It is well known that a goods buyer who uses the internet shopping mall is sensitive to a sale price. The buyer visits the various shopping malls and collects the product information including purchase conditions for goods purchase decision-making. Recently the necessity of information support is increasing because of increase of information which is necessary and complexity of goods purchase decision-making process. The comparison shopping agent systems have provided price comparison information which is collected from various shopping malls to satisfy buyer's information craving. But the frequent price change caused by keen price competition is becoming the primary reason of information quality decline among price comparison sites. RSS which is a family of web feed formats used to publish frequently updated is applied even in on-line shopping malls. This paper develops a product information collection system which can provide up-to-date product information of real-time using RSS. To achieve this goal RSS crawling system for searching shopping mall RSS links automatically, RSS reader to collect product information from several shopping malls and a product DB where the application characteristic is high are suggested.
그간 10여 년간 열심히 추진해서 많은 성과를 낸 한국적품질혁신운동을 하드 싱글PPM(Hard Single PPM)이라고 한다면, 향후 품질혁신운동은 이제까지의 활동을 점검해 보고 보완할 점들을 개선ㆍ보완하여 보다 더 똑똑하고 영리하게 추진하여 모기업과 협력업체 모두에게 이익이 되는 스마트 싱글PPM(Smart Single PPM)이어야 한다. 그리고 이것은 오늘날의 동반성장 시대에 꼭 들어맞는 핵심적 경영전략의 실체로 이해하고 추진해야 할 것이다.
따라서 본연구에서는 스마트 싱글PPM활동으로 대ㆍ중소기업 동반성장을 강화할 수 있는 방안을 제시하고자 한다.
The purpose of this study was to investigate the effects of the secondary tasks such as sending text message (STM) and searching navigation (SN) on skin conductance level (SCL) during driving. The participants included 29 taxi drivers; 14 males aged 56.7 ± 4.3 with 29.7 ± 7.0 years of driving experiences and 15 females aged 55.5 ± 3.5 with 20.1 ± 5.7 years of driving experiences. All subjects were instructed to keep a certain distance (30m) from the car ahead and a constant speed (80km/h or 100km/h). SCL was measured during driving only and driving with secondary tasks. SCL was more increased during the driving with secondary tasks than driving only. By increasing the driving speed, SCL was increased during the driving with secondary taks. Secondary tasks increased an activation of sympathetic nerve system. However, there were no significant differences in the SCL according to gender.
In the previous study, the construction guideline of IT infra-structure for a u-City was introduced. However, it is only concentrated on the components and construction procedure for provider-oriented and technology-oriented sensor networks. In this paper, it is described (1) introduction of the construction guideline of IT infra-structure for a u-City, (2) the problems of the previous study, and (3) the enhancement direction of the construction guideline of IT infra-structure for a u-City.
Because it is unable to be systematic and it progress the management diagnosis in comparison with the large enterprise periodically, the most of our country small and medium companies does not correspond to the suddenly change environment agilely. Small and medium companies have a lot of the place where the company culture is not settled in comparison with the large enterprise. And the employees of satisfaction are low. This research is the research that it analyze the manufacturing job process based on the systematic management consulting for small and medium factory and draws the execution subject for the improvement of productive capacity and management efficiency. The investigation classifies as the job process and management control and organizational culture and the work satisfaction analyze the investigation. The research target company installs against small and medium manufacturer of the Gumi area of Gyeong Sang Buk Do Province. The high level of process can be redesigned. And the inefficiency of the category of manufacture and waste is removed through the management diagnosis procedure of presenting in this research the production system construction which is suitable for the own company manufacture business is promoted and many contributions seem to be protected.
In these days, mobile technology such as smart phone and GPS have an effect on business processes of many companies especially a transportation company. The purpose of this paper is to present the development processes of real time vehicles tracking and intelligent TMS(Transportation Management System) using smart phone applications.
The objective of this study is two-fold. The first is to redesign business process of the transportation company. Using BPR(business process re-engineering), we analyze current processes to find opportunities for improvement redefining processes after adopting mobile technology precisely. The second is to develop the real time vehicles tracking and intelligent TMS. Proposed system consists of four parts: (1) intelligent TMS(web system) (2) real time vehicle tracking application for TMS (3) real time tracking application for customer (4) salesman supporting application. Developed system was tested at the transportation company and was found to be useful system.