• Fire Science and Engineering
• /
• v.30 no.5
• /
• pp.26-35
• /
• 2016

Sprinkler installations shall be operated at normal operating temperature of the atmosphere as a fire sprinkler head in any facility to control and extinguish the fire when the fire initially. Recently, however, some flush type quick response automatic sprinkler heads in slow fire place is a problem that can not be normal operation are raised. In this paper, by using the experimental model of the Apartment house of Commons and Cabinet burner size bedrooms fire conditions to form a slow growth rate and can supply more than 0.2 MPa pressure is the minimum pressure that can be applied inside the pipe in the field experiment was conducted. In the majority of experiments lush type quick response automatic sprinkler heads which is used in the country it was confirmed to be incompletely opened as the Cold Soldering occur. This phenomenon is likely to fail early fire suppression and control because they can cause the spread of fire and casualties needed to complement domestic product testing and type approval standards through additional research.

• Proceedings of the KIEE Conference
• /
• 1996.07a
• /
• pp.267-269
• /
• 1996

Servo systems became indispensable to applications such as industrial robots and numerically controlled machinery. Especially, induction motor drives are widely used as ac-servo system owing to the fact that it is maintenance-free. At the present time, Quick torque control methods such as vector control have been employed that enables an induction motor to attain as quick torque response as a dc motor. However, these methods can not be realized without knowing several motor parameters accurately, because the methods need them to calculate flux or voltage command. Most of all, secondary resistance has to be identified accurately, because it's value varies greatly for operation of induction motors. In this paper, a new identification method of secondary resistance based on quick torque control system of induction motors is proposed. The proposed method is derived theoretically from motor circuit equation and can be realized very simply by detecting primary current and voltage command of the motor. Through the numerical simulation considered using PWM inverter, the validity of the proposed method was successfully confirmed.

• Journal of Intelligence and Information Systems
• /
• v.16 no.3
• /
• pp.163-179
• /
• 2010

Recentlythe concept of fast fashion is drawing attention as customer needs are diversified and supply lead time is getting shorter in fashion industry. It is emphasized as one of the critical success factors in the fashion industry how quickly and efficiently to satisfy the customer needs as the competition has intensified. Because the fast fashion is inherently susceptible to trend, it is very important for fashion retailers to make quick decisions regarding items to launch, quantity based on demand prediction, and the time to respond. Also the planning decisions must be executed through the business processes of procurement, production, and logistics in real time. In order to adapt to this trend, the fashion industry urgently needs supports from intelligent quick response(QR) system. However, the traditional functions of QR systems have not been able to completely satisfy such demands of the fast fashion industry. This paper proposes an intelligent quick response system for the fast fashion(IQRS-FF). Presented are models for QR process, QR principles and execution, and QR quantity and timing computation. IQRS-FF models support the decision makers by providing useful information with automated and rule-based algorithms. If the predefined conditions of a rule are satisfied, the actions defined in the rule are automatically taken or informed to the decision makers. In IQRS-FF, QRdecisions are made in two stages: pre-season and in-season. In pre-season, firstly master demand prediction is performed based on the macro level analysis such as local and global economy, fashion trends and competitors. The prediction proceeds to the master production and procurement planning. Checking availability and delivery of materials for production, decision makers must make reservations or request procurements. For the outsourcing materials, they must check the availability and capacity of partners. By the master plans, the performance of the QR during the in-season is greatly enhanced and the decision to select the QR items is made fully considering the availability of materials in warehouse as well as partners' capacity. During in-season, the decision makers must find the right time to QR as the actual sales occur in stores. Then they are to decide items to QRbased not only on the qualitative criteria such as opinions from sales persons but also on the quantitative criteria such as sales volume, the recent sales trend, inventory level, the remaining period, the forecast for the remaining period, and competitors' performance. To calculate QR quantity in IQRS-FF, two calculation methods are designed: QR Index based calculation and attribute similarity based calculation using demographic cluster. In the early period of a new season, the attribute similarity based QR amount calculation is better used because there are not enough historical sales data. By analyzing sales trends of the categories or items that have similar attributes, QR quantity can be computed. On the other hand, in case of having enough information to analyze the sales trends or forecasting, the QR Index based calculation method can be used. Having defined the models for decision making for QR, we design KPIs(Key Performance Indicators) to test the reliability of the models in critical decision makings: the difference of sales volumebetween QR items and non-QR items; the accuracy rate of QR the lead-time spent on QR decision-making. To verify the effectiveness and practicality of the proposed models, a case study has been performed for a representative fashion company which recently developed and launched the IQRS-FF. The case study shows that the average sales rateof QR items increased by 15%, the differences in sales rate between QR items and non-QR items increased by 10%, the QR accuracy was 70%, the lead time for QR dramatically decreased from 120 hours to 8 hours.

• Journal of Korean Society of Transportation
• /
• v.25 no.6
• /
• pp.43-53
• /
• 2007

In this research, in order to more concretely define the concept of the previously vaguely defined fire road, the authors propose new terminology called disaster prevention routes. These are defined as predefined access routes for the quick response to disaster areas. For this, the authors suggest selection techniques for disaster prevention routes considering characteristics of fire trucks and selected areas. The paper also includes legally-based ideas for the executive departments with exclusive responsibility for continuous management and supervision of disaster response. In addition, a case study is performed with a virtual scenario including the outbreak of fire in one borough of Seoul. This case study shows that the damage can be decreased by prompt access of fire trucks. The establishment of predefined access routes to disaster areas can help to protect citizens with more rapid response by emergency crews. Indirect benefits also include reduced congestion of roads through the prohibition of parking and stopping on the chosen roads.

• Proceedings of the Korean Institute of Industrial Safety Conference
• /
• 1997.11a
• /
• pp.37-41
• /
• 1997

스프링클러 소화설비는 화재가 발생하였을 때 자동적으로 감열, 작동하여 초기화재 진압을 목적으로 하는 소화설비로서 소화특성은 화재발생으로부터 소화가 시작되는 화재감지특성과 화재제어 및 진압에 대한 방사특성1) 으로 FRS2) 3)와 FMRC4)에서는 열응답의 민감도를 나타내는 반응시간지수(RTI)의 측정방법과 이론을 제시하였다. 반응시간지수는 스프링클러헤드의 작동에 필요한 충분한 열을 주위로부터 얼마나 빠른 시간내에 흡수 할 수 있는지를 나타내는 특성치로서 가열공기의 온도 및 속도에 의해 결정되며 값이 적을수록 헤드가 조기에 작동하게 된다. (중략)

• Proceedings of the KIEE Conference
• /
• 1993.11a
• /
• pp.73-75
• /
• 1993

In this paper, the transient shielding characteristics of slitted electrothermal shield of superconducting alternator is studied. The field current and the armature currents variations during three phase short circuit fault are calculated and compared to those of the conventional one. And the response of the armature current due to step-up of the excitation voltage showes the feasibility of the quick response excitation system available for improving the transient stability.

• The Transactions of the Korean Institute of Electrical Engineers
• /
• v.38 no.3
• /
• pp.166-172
• /
• 1989

The model reference adaptive control algorithm (MRAC), which is one of the methods for controlling the speed of a permanent magnet synchronous motor (PMSM), has been developed using the autoregressive (ARMAX) method. Applying this algorithm to a microprocessor which is used in driving PMSM with PI controller, it has been proved that the response speed of the reference input follows closely that of the reference model. It has also been proved by experiments that the quick speed response without over-shoot could be obtained for the motor system with variable parameters.

• Journal of Distribution Science
• /
• v.12 no.2
• /
• pp.81-93
• /
• 2014

Purpose - Recent rapid environmental changes in the hospital industry are accelerating the spread of customer satisfaction management. Customers' desires have become diversified and advanced; in the past, customers tended to preferred popularized and standardized care, whereas they now prefer individualized and differentiated care, based on an increase in income. Specifically, this study tries to analyze the mediating effects of factors that affect the configuration portion of customer value and relationship quality (customer trust and relationship commitment) by investigating the impacts and configuration factor of customer value on relationship quality and determining how these factors impact customer loyalty directly or indirectly. Research design, data, and methodology - This study aims to determine the customer value factors that impact the perceptions of dental hospital customers, how these factors impact relationship quality and customer loyalty, and the causal relationship of these factors, and to verify the research model based on previous research. To increase the validity and reliability of the questionnaire, the authors of this study constructed basic questions using measurement tools already verified for reliability and validity in existing studies. In this study, customer value is defined as customers' recognizing value by exchanging goods or services and is measured using a five-point Likert scale using 19 questions about the 4-Ds, such as convenience value, quick service, response value, and trustworthiness. For each question, "very low" was set at 1 point and "very high" at 5 points. Customer trust, relationship commitment, and customer loyalty are also measured using a five-point Likert 5-point scale (1 = very low, 5 = very high) based on previous studies. Results - For customer value, trustworthiness and quick service are shown to have direct significant positive impacts on customer loyalty. For customer value and quality of the relationship (customer confidence and commitment), trustworthiness, response value, confidence value, and quick service are shown to have a significant positive impact on customer truth, in order of impact. For the relationship between customer value and commitment, quick service and response value are shown to have significant positive impact. Customer confidence has a very high positive influence on commitment. For the relationship between the quality of the relationship (customer confidence and commitment) and customer loyalty, customer confidence is shown to have more of an impact than commitment, in terms of a direct influence of customer loyalty. Commitment showed a positive impact on customer loyalty. For the relationship between customer confidence and customer loyalty, commitment showed a mediating effect. Conclusions - Many additional variables could apply; this study focused on customer value, quality of the relationship, and customer loyalty. In particular, there will be significant value in identifying the relationships among customer value, relationship quality, and customer loyalty by using impact factors for customer value; ensuring external validity by expanding denotation and applying the findings to other service industries; and undertaking continuous research. This study has limited generalization potential because the target for this survey was located only in the Seoul area.

• Proceedings of the CALSEC Conference
• /
• 1998.10a
• /
• pp.235-246
• /
• 1998

QR(Quick Response)란, 생산/유통 관계의 거래 당사자가 협력하여 소비자에 대하여 적절한 상품을. 적절한 장소에, 적시에, 적량을, 적당한 가격으로 제공하는 것을 목표로 정보기술을 활용하여 생산, 물류기술의 단축, 재고의 삭감, 반품 LOSS의 삭감 등 생산ㆍ유통 각 단계에서의 합리화를 실현하고, 그 성과를 생산자, 유통관계자, 소비자 사이에서 분배 할 수 있도록 하는 개념으로 어패럴 등의 의류상품을 중심으로 적용(중략)

• Proceedings of the Korean DIstribution Association Conference
• /
• 1999.11a
• /
• pp.63-81
• /
• 1999

WTO, IMF 등 국가경제의 혼란과 경영환경 악화는 섬유 ㆍ패션업계에도 그대로 투영되고 있다. 실업증가와 소비심리 위축으로 인한 극심한 내수부진과 업체간 경쟁격화, 고비용, 저효율, 재고부담에 따른 자금난 등으로 고심하고 있다. 지식 집약적 정보산업으로서 패션산업은 경쟁력 제고를 위해서는 업계의 협력과 정보공유를 바탕으로 한 효율개선과 비용 절감이 필요하다. (중략)