• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 추계학술대회논문집
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• pp.643-648
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• 2003

The problem considered in this paper is that the tip position of a flexible cantilever beam is controlled to follow a command signal, using a pair of piezoelectric actuators at the clamped end. The beam is lightly damped and so the natural transient response is rather long, and also since the sensor and actuator are not collocated, the plant response is non-minimum phase. Two control strategies were investigated. The first involved conventional PID control in which the feedback gains were adjusted to give the fastest closed-loop response to a step input. The second control strategy was based on an internal model control (IMC) architecture. The control filter in the IMC controller was a digital FIR device designed to minimize the expectation of the mean square tracking error. The IMC controller designed fur the beam was found to have very much reduced settling times to a step input compared with those of the PID controller.

• Smart Structures and Systems
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• 제6권8호
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• pp.953-974
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• 2010

The performance of variable dampers for seismic protection of the benchmark highway bridge (phase I) under six real earthquake ground motions is presented. A simplified lumped mass finite-element model of the 91/5 highway bridge in Southern California is used for the investigation. A variable damper, developed from magnetorheological (MR) damper is used as a semi-active control device and its effectiveness with friction force schemes is investigated. A velocity-dependent damping model of variable damper is used. The effects of friction damping of the variable damper on the seismic response of the bridge are examined by taking different values of friction force, step-coefficient and transitional velocity of the damper. The seismic responses with variable dampers are compared with the corresponding uncontrolled case, and controlled by alternate sample control strategies. The results of investigation clearly indicate that the base shear, base moment and mid-span displacement are substantially reduced. In particular, the reduction in the bearing displacement is quite significant. The friction and the two-step friction force schemes of variable damper are found to be quite effective in reducing the peak response quantities of the bridge to a level similar to or better than that of the sample passive, semi-active and active controllers.

• 한국조리학회지
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• 제10권1호
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• pp.153-166
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• 2004

This study analyzed the positioning of family restaurants by image factors, as a result, customers divided into 5 groups from 7 restaurants. All customers realized similar images from subject restaurants, which told that those restaurants are within an intense competition. Strong points of each restaurant are as follows by factors; Outback and TGIF was confidence, Sizzler and Outback was response, Outback and Skylark was type, Bennigan's and TGIF was reliability, Bennigan's and Outback was reactivity. Weak points each restaurant are as follows by factors; Bennigan's and TonyRoma's were confidence and response, TonyRoma's and Marche was type, Sizzler and TonyRoma's was confidence, Sizzler and TonyRoma's was reactivity. The analysis on each restaurants' images by factors told that response and reactivity were above the average, confidence and reliability were around the average, type was the lowest value. It told that customers didn't give a high rating toward restaurants' food flavor, freshness, cleanliness, therefore restaurants need pay more attention to positioning strategies, Instead, customers gave a high rating toward service, accessibility, menu-variety, and parking-convenience, therefore, continuous improvement is required.

• 한국환경농학회:학술대회논문집
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• 한국환경농학회 2011년도 30주년 정기총회 및 국제심포지엄
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• pp.196-204
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• 2011

Abiotic stress is the primary cause of crop loss worldwide, reducing average yields for most major crop plants by more than 50%. In addition, future agricultural production and management will encounter multifaceted challenges from global climate change. Therefore, it is necessary to study the molecular response of crop plants to the stresses in order to develop appropriate strategies to sustain food production under adverse environmental conditions. We carried out a large scale proteomic analysis of soybean plants in response to various abiotic stresses, including drought, salinity, waterlogging and their interactions. Proteins were analyzed by two dimensional polyacrylamide gel electrophoresis followed by matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectrometry. The identified proteins are involved in a wide range of cellular functions. In addition to the well known stress-associated proteins, we identified several novel proteins, which were not reported before. In many cases our proteomic data bridges the gap between mRNA and metabolite data. Our studie provides new insights into identification of abiotic stress responsive proteins in soybean, and demonstrates the advantages of proteomic analysis in dissecting metabolic and regulatory networks.

• 급식외식위생학회지
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• 제3권1호
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• pp.1-7
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• 2022

As one of the post-COVID-19 response strategies, representative processed products derived from the natural plant material flaxseed and a dietary supplement fortified with female hormones (estrogens) were developed in Canada, an eco-friendly country was introduced. These products were: 1) flaxseed oil to help maintain cognitive and immune function, 2) Lignan50, a substance with effects similar to estrogen, a female hormone, 3) XanFlax, a thickener for confectionery/baking and egg substitute, 4) MediFlax, a constipation reliever, 5) SesaFlax, which has a fragrance similar to sesame, 6) Linusorb, which is effective for its pharmaceutical anti-inflammatory/anti-oxidation and anti-aging properties, and 7) LinuLyte, a water/electrolyte supplement containing high dietary fiber. It is expected that these dietary products will help maintain and promote health as part of a response to the COVID-19 pandemic.

• 신재생에너지
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• 제20권2호
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• pp.17-25
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• 2024

In this study, the effect of the time step specified in a computational fluid dynamics (CFD) simulation on load response is analyzed and the drag coefficients of the floating body of floating offshore wind turbines (FOWTs) are estimated. By evaluating the error in the FOWT load response and the change in the drag-coefficient values based on the density of the time intervals, this study aims to establish a time-interval setting that minimizes the time and cost of CFD simulations for selecting drag-coefficient values. Practical CFD utilization strategies necessary for the calibration of medium-to high-fidelity analysis tools are presented. Based on a comparative analysis of CFD simulations conducted at various time intervals, the results confirmed that under a certain time interval that sufficiently considers various factors, the accuracy of the FOWT response with respect to density shows minimal differences, thereby providing an efficient utilization method for CFD simulations in FOWT design and analysis.

• 한국보육지원학회지
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• 제20권2호
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• pp.169-194
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• 2024

Objective: The purpose of this study is to develop a child-care support policy strategy in response to the decrease in the population of children aged 0-5 years. This will be achieved by collecting opinions from a panel of experts on child-care support policies through a Delphi survey. Methods: To achieve the purpose of this study, a panel of 20 experts in child-care policy was selected, and a Delphi survey was conducted over three sessions. Data collected through the Delphi survey underwent analysis, including frequency analysis, descriptive statistics, content validity ratio, coefficient of variation, agreement, and convergence. Data processing was carried out using Excel 2016 and SPSS 26.0. Results: As a result of the study, a child-care support policy strategy addressing the decrease in the population of children aged 0-5 years was developed, comprising three policy areas, nine policy tasks, and 38 detailed policy tasks. Conclusion/Implications: Based on these results, it is anticipated that the study will not only enable the preparation of a strategy for child-care support policy to address the decrease in the population of children aged 0-5 years but also offer significant implications for shaping the direction of child-care support policy in alignment with the common good.

• 한국콘텐츠학회논문지
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• 제15권7호
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• pp.460-476
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• 2015

위기 커뮤니케이션에 있어 SNS를 비롯한 뉴미디어 활용의 중요성이 강조되고 있지만 구체적인 활용 방안에 대한 고찰과 논의는 부족한 실정이다. 이 연구는 지난 해 논란이 되었던 식약처의 '파라벤 치약' 사례를 중심으로 정부의 위기관리 체계를 커뮤니케이션 관점에서 살펴봄으로써, 위기 시 대언론관계 관리와 뉴미디어의 역할에 대해 실무적 함의를 제공하는 것을 목적으로 한다. 이 연구는 정책 이슈의 확산 과정을 SNS 중심의 의제설정 관점에서 살펴보고, 정책결정과정의 주요 참여자인 정부, 언론, 국민들이 정부의 위기 상황에서 어떤 메시지를 생산하였는지 비교하였다. 이를 위해 파라벤 치약 이슈가 논란이 되었던 한 달여 동안의 사건 전개 과정을 4단계로 구분하고, 단계별로 식약처의 해명 자료와 주요 언론의 보도 기사(총 45건), 관련 트윗(총 645건)을 텍스트 분석, 어절 분석, 네트워크 분석을 통해 살펴보았다. 정부, 언론, 국민이 생산한 메시지를 분석한 결과를 토대로 식약처의 위기 커뮤니케이션에 있어서의 문제점에 대해 논의하고, 위기 발생 시 정부의 대언론 관계 관리 및 뉴미디어 활용 방안을 제시하였다.

• 한국병원경영학회지
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• 제13권1호
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• pp.65-83
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• 2008

Although a variety of customer relationship management (CRM) activities have been provided by many hospitals in Korea, there lacks empirical evidence on the effect of CRM. The present study was conducted to examine the effect of CRM in terms of the customer response to CRM in a woman's hospital setting. A total of 380 patients receiving inpatient or outpatient care from woman's hospital between October 25 and November 4, 2005 were surveyed for the degree of their experience of and preference for CRM activities of the hospital by 5-point Likert-type scale. Patients were also asked about the level of customer loyalty to the hospital. Eighteen CRM activities offered by the hospital was classified into 4 types of CRM strategies according to Berry and Parasuranman: price, social, structural, and relationship recovery strategy. There's a significant positive correlation between the degree of experience of CRM and preference for CRM(r=0.49, p<0.001). Regression analysis results showed the significant positive relationship between the degree of experience of CRM and customer loyalty(${\beta}$=0.448, p<0.05). Among the 4 CRM strategies, only social(${\beta}$=0.127, p<0.05) and structural strategy(${\beta}$=0.266, p<0.05) showed signifiant positive relationship with customer loyalty. Overall, the favorable customer response to CRM in terms of preference for CRM and customer loyalty indicates that there's a positive effect of CRM on the continuity of the relationship between patients and health care providers.

• 한국산학기술학회논문지
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• 제19권10호
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• pp.214-221
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• 2018

본 연구의 목적은 스포츠 스폰서십의 부정적인 효과와 이에 대한 대응방안을 규명하기 위한 것이다. 유명 스포츠인과 관련한 부정적인 사건이 발생하였을 때 유명 스포츠인의 책임수준이 소비자들이 유명 스포츠인과 해당 보증인이 광고하는 제품에 대해 가지는 태도에 미치는 영향력을 확인하고자한다. 또한, 유명 스포츠인의 책임수준이 유명 스포츠인과 제품에 대한 태도에 미치는 영향력에 있어서 대응 전략의 조절효과를 검증하고자 한다. 이를 위해 대학생 총 135명을 대상으로 가상의 시나리오를 포함하는 설문조사를 실시하여 자료를 수집하였으며, 이 중 126부를 분석에 이용하였다. 가설 검증을 위해 분산분석을 실시한 결과, 부정적 사건이 발생하였을 때 유명 스포츠인의 책임수준이 높을수록 실험참가자들은 유명 스포츠인과 해당 유명 스포츠인이 광고하는 제품에 대해 부정적인 태도를 형성하는 것으로 확인되었다. 그리고 조절효과 분석결과, 부정적 사건에 대한 유명 스포츠인의 책임수준이 유명 스포츠인과 제품에 대해 미치는 영향력은 대응전략의 유형에 따른 유의미한 차이를 보여주었다.