• 호남수학학술지
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• 제31권3호
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• pp.351-368
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• 2009

Quick ideals and the fuzzification of quick ideals in d-algebras are considered, and some related properties are investigated. The intuitionistic fuzzification of quick ideals of a d-algebra is established, and related results are studied. The notion of equivalence relations on the family of all intuitionistic fuzzy quick ideals of a d-algebra is introduced, and then some properties are discussed.

• 유통과학연구
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• 제17권7호
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• pp.87-98
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• 2019

Purpose - The goal of this research is to examine the influence of Quick Response on the supply chain performance. Furthermore, this study investigates the potential of Quick Response to be a more advanced form of supply chain collaboration program with extensive information sharing activities. Research design, data, and methodology - The mathematical model is developed to represent the two stage supply chain system with a single manufacturer and one retailer. In the numerical study with the proposed mathematical models, three supply chain systems including the traditional system, Quick Response, and the fully shared information system are compared in terms of their profits. Results - The numerical analysis shows both manufacturer and retailer obtain greater profits under Quick Response than in the traditional system. While the fully shared information outperforms Quick Response as well as the traditional system, it results in lower manufacturer's profit compared with Quick Response. Conclusions - According to the numerical examples, Quick Response is the effective supply chain collaboration program that is beneficial to every supply chain member. The fully shared information system, as a more advanced form of collaboration than Quick Response can bring more benefits to the whole supply chain system, but it is necessary to prepare the proper incentive program that enables every member to share its benefits equally.

• 호남수학학술지
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• 제30권1호
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• pp.65-74
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• 2008

The notion of vague quick ideals of BCK/BCI-algebras is introduced, and several properties are investigated. Relations between a vague ideal, a vague BCK/BCI-algebra and a vague quick ideal are provided. A condition for a vague quick ideal to be a vague ideal is given.

• Journal of Positioning, Navigation, and Timing
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• 제10권4호
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• pp.363-369
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• 2021

Since the Global Navigation Satellite System (GNSS) signal received from the low Earth orbit (LEO) satellite is only affected by the upper ionosphere, the magnitude of the ionospheric delay of Global Positioning System (GPS) signal received from ground user is different. Therefore, the ground-based two-dimensional ionospheric model cannot be applied to LEO satellites. The NeQuick model used in Galileo provides the ionospheric delay according to the user's altitude, so it can be used in the ionospheric model of the LEO satellites. However, the NeQuick model is not suitable for space receivers because of the high computational cost. A simplified NeQuick model with reduced computing time was recently presented. In this study, the computing time of the NeQuick model and the simplified NeQuick model was analyzed based on the GPS Klobuchar model. The NeQuick and simplified NeQuick model were applied to the GNSS data from GRACE-B, Swarm-C, and GOCE satellites to analyze the performance of the ionospheric correction and positioning. The difference in computing time between the NeQuick and simplified NeQuick model was up to 90%, but the difference in ionospheric accuracy was not as large as within 4.5%.

• 한국항행학회논문지
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• 제22권4호
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• pp.271-278
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• 2018

단일주파수 수신기를 사용하는 저궤도위성의 전리층 보정을 수행하기 위해선 지상기반 전리층 보정 모델에 변환 계수를 적용해야 한다. 전리층 변환 계수는 3차원 전리층 분포를 제공하는 NeQuick 모델을 이용하여 계산할 수 있다. 본 연구에서는 2015년 한 해 NeQuick G 모델을 이용하여 전리층 변환 계수를 계산한 후, 저궤도위성 관측값과 IGS 지상 전리층지도의 비율로 계산된 전리층 변환계수와 비교하였다. NeQuick G의 전리층 변환 계수를 IGS 전리층지도에 적용한 후, 저궤도위성에서 관측된 전리층 지연과 비교하여 정확도를 분석하였다. 또한, NeQuick G 변환 계수를 IGS 전리층 지도에 적용하여 계산한 전리층 지연 오차와 NeQuick G 모델만을 이용하여 계산한 전리층 지연 오차를 비교분석하였다. 추가적으로 위도 및 태양활동에 따른 전리층 지연오차를 분석하였다. 2015년 한 해 NeQuick G 모델로 계산된 평균 전리층 변환 계수는 0.269로 나타났으며, IGS 전리층 지도에 NeQuick G 변환 계수를 적용한 전리층 지연 오차는 NeQuick G 모델만으로 계산된 전리층 지연 오차보다 23.7% 더 작았다.

• 패션비즈니스
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• 제4권3호
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• pp.103-114
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• 2000

The purpose of this study was to test the discriminant analysis model of Quick Response system and to examine the detailed relationship between each discriminant factor and Quick Response adoption. In this discriminant analysis model of Quick Response system, firm size, strategic type, product category, fashion trend, selling time and the Quick Response benefits were included as discriminant factors. Onehundred and two subjects were randomly selected for the survey study and discriminant analysis, descriptive analysis, t-test, and x square test were used for the data analysis. The results of this study were: 1. Wilks Lambda and F value support the discriminant analysis model that, taken together firm size, strategic type, product category, fashion trend, selling time and the Quick Response benefits significantly help to explain Quick Response adoption. 2. The importance of discriminant ability was, in order, firm size, the Quick Response benefits, women's wear, fashion trend, analyzer, selling time, reactor, defender and men's wear. 3. The discriminant function had the high hit ratio, so this can be well used for the classification of Quick Response adoption/nonadoption.

• 유통과학연구
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• 제17권9호
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• pp.5-13
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• 2019

Purpose - This study investigates the key features of Quick Response as the fundamental form of supply chain collaboration by reviewing the selected past studies. Based on the findings from the literature review, this study provides the guideline for future researchers and business practitioners who search for more advanced collaboration programs. Research design, data, and methodology - This study conducts the literature review on the past studies that had researched Quick Response. The selected studies are analyzed in terms of how to represent Quick Response in the models and which issue to address. Results - This study finds that the past studies lack a unified concept of Quick Response, and they fail to provide the consistent guideline on how to run this program in practices. The literature review also shows that only a small number of research issues has been addressed by most researchers. Conclusions - On the purpose of figuring out the real value of Quick Response, this study suggests that future studies apply its extensive application to the entire supply chain system. This study also shed light on the potential of Quick Response to be a more advanced supply chain collaboration program with additional collaborative functions other than information sharing.

• 한국기계가공학회지
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• 제15권2호
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• pp.16-21
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• 2016

This study is a numerical analysis of the flow characteristic of a quick coupler. The quick coupler is a popular coupling tool for pipelines in hydraulic and pneumatic systems. In this study, the flow characteristic of a quick coupler outlet is conducted about the flow coefficient. The quick coupler is analyzed for improving flow and confirmed with the study results. The velocities with pressure distribution according to inlet and outlet pressure drop of the coupler are also compared. The flow coefficient is analyzed according to the flow analysis result for each pressure drop. When the pressure drop is 1 psi, the flow coefficient (Cv) matched about 98% of the value provided by the actual product.

• 한국지능시스템학회논문지
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• 제20권3호
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• pp.428-433
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• 2010

u와 v를 두 인접수열 (consecutive sequence)이라고 했을 때 이때 "block rotation"이란 uv를 vu로 바꾸는 연산을 의미한다. 기존에 3개의 block rotation 알고리즘 즉 "BlockRotation", "Juggling" 그리고 "Reversal 알고리즘"이 소개되었는데 최근 우리는 하나의 새로운, QuickRotation 이라고 명명한 block rotation 알고리즘을 소개했다. 우리는 이 논문에서 QuickRotation 알고리즘을 이들 기존의 알고리즘들과 비교해 보이고자 한다. 벤치마킹 뿐만 아니라 복잡도 분석을 통한 비교를 통해 QuickRotation 알고리즘의 우수성을 증명해 보이고자 한다.

• 한국지반환경공학회 논문집
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• 제11권5호
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• pp.45-51
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• 2010

본 연구에서는 생석회 말뚝에 의한 연약지반 안정처리공법으로써의 현장 적용성을 평가하기 위하여 한국산 생석회에 대한 공학적 특성 규명은 물론 지중에서의 생석회에 의한 지반개량 원리 및 주변지반의 개량특성에 대한 이론적 고찰과 함께 실내모형시험을 수행하여 이를 바탕으로 실제 현장에서의 적용성과 활용성을 평가하고자 하였다. 실험결과 생석회 말뚝 공법은 생석회의 소화 흡수에 의한 탈수효과, 말뚝의 팽창에 의한 압밀효과 및 말뚝 자체의 강도에 의한 지지력 증가, 침하감소 효과 등의 개량효과를 얻을 수 있는 것으로 평가되었다. 생석회는 재료 특성이 매우 양호하여 그 자체로써 상당한 강도를 가지고 있으나 보다 큰 강도가 요구될 시에는 시멘트 등을 첨가하면 효과가 있을 것으로 판단된다.