• 제목/요약/키워드: Critical Science Research

검색결과 2,676건 처리시간 0.047초

결정적 사건기법(CIT)을 이용한 소비자의 유통채널 이용경험에 대한 연구 (Understanding the Consumer Experience in Retailing Channel Using Critical Incident Technique)

  • 최아영;나종연
    • 한국생활과학회지
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    • 제20권6호
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    • pp.1185-1198
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    • 2011
  • This research explores the consumers' experience in retailing channel(offline channel and online channel) using the critical incident technique. This research aims to clarify the common incidents within retailing channels which implies decisive factors over the channels, and to clarify the contrasts between channels to compare advantages and disadvantages. Therefore, the research is designed to collect the consumers' narrative of those who have used both channels in 3 months. Classifications are conducted with other researchers majoring consumer science. The results address how impressive experiences are constructed on each channel in three dimensions: product, information search, and the purchase-service dimension. These results are able to provide implications for offline and online retailers and directions for future research.

Effect of REM Addition on The Surface Tension and The Critical Temperature of The Immiscible Liquid Phase Separation of The 60%Bi-24%Cu-16%Sn alloy

  • Park, Joong-Chul;Min, Soon-Ki;Lee, Joon-Ho
    • 한국재료학회지
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    • 제19권2호
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    • pp.111-114
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    • 2009
  • For the fabrication of core-shell structure bimetallic lead-free solder balls, both the critical temperature ($T_{cr}$) for the phase separation of two immiscible liquid phases and the temperature coefficient of the interfacial tension between the two separated liquid phases are required. In order to obtain this information, the temperature dependence of the surface tension of 60%Bi-24%Cu-16%Sn(-REM) alloys was measured using the constrained drop method. The slope of the temperature dependence of the surface tension changed clearly at a critical temperature for the separation of two immiscible liquid phases. The critical temperature of the 60%Bi-24%Cu-16%Sn alloy was estimated to be 1097K. An addition of 0.05% Ce decreased the critical temperature to 1085K, whereas that of 0.05% La increased it to 1117K. It was found that the surface tension and its temperature coefficient of the 60%Bi-24%Cu-16%Sn alloy were slightly increased by the addition of 0.05% Ce and 0.05% La. In addition, additions of Ce and La increased the temperature coefficient of the interfacial tension.

중환자실 간호사의 비판적 사고성향, 고위험약물 투약오류 위험수준 및 투약안전역량 (Critical Thinking Disposition, Medication Error Risk Level of High-alert Medication and Medication Safety Competency among Intensive Care Unit Nurses)

  • 이윤희;이영진;안정아;김희준
    • 중환자간호학회지
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    • 제15권2호
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    • pp.1-13
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    • 2022
  • Purpose : The study aimed to identify relationship among intensive care unit (ICU) nurses' critical thinking disposition, medication error risk level of high-alert medication, and medication safety competency, as well as the factors affecting medication safety competency. Methods : The participants were 266 ICU nurses of one higher-tier general hospital and one general hospital in Province. The data were collected using structured self-administered questionnaire from August 10 to August 31, 2021. Measurements included the critical thinking disposition questionnaire, nurses's knowledge of high-alert medication questionnaire, the medication safety competency scale. Data were analyzed using hierarchical multiple regressions using SPSS/WIN 28.0. Results : In the multiple regression analysis, the medication safety competence has a statistically significant correlation with the working department, the critical thinking disposition, and medication error risk level of high-alert medication. Conclusion : Based on the results of this study, it is suggested to develop and apply an educational strategy that can strengthen the knowledge and skills of critical thinking disposition and medication error risk level of high-alert medication to improve the ICU nurse's medication safety competency.

An Experimental Study of Critical Heat Flux in Non-uniformly Heated Vertical Annulus under Low Flow Conditions

  • Chun, Se-Young;Moon, Sang-Ki;Baek, Won-Pil;Chung, Moon-Ki;Masanori Aritomi
    • Journal of Mechanical Science and Technology
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    • 제17권8호
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    • pp.1171-1184
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    • 2003
  • An experimental study on critical heat flux (CHF) has been performed in an internally heated vertical annulus with non-uniform heating. The CHF data for the chopped cosine heat flux have been compared with those for uniform heat flux obtained from the previous study of the authors, in order to investigate the effect of axial heat flux distribution on CHF. The local CHF with the parameters such as mass flux and critical quality shows an irregular behavior. However, the total critical power with mass flux and the average CHF with critical quality are represented by a unique curve without the irregularity. The effect of the heat flux distribution on CHF is large at low pressure conditions but becomes rapidly smaller as the pressure increases. The relationship between the critical quality and the boiling length is represented by a single curve, independent of the axial heat flux distribution. For non-uniform axial heat flux distribution, the prediction results from Doerffer et al.'s and Bowling's CHF correlations have considerably large errors, compared to the prediction for uniform heat flux distribution.

임무지향 컴퓨터를 위한 메시지패싱 고장감내 기법 (A Fault-Tolerant Scheme Based on Message Passing for Mission-Critical Computers)

  • 김태현;배정일;신진범;조길석
    • 한국군사과학기술학회지
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    • 제18권6호
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    • pp.762-770
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    • 2015
  • Fault tolerance is a crucial design for a mission-critical computer such as engagement control computer that has to maintain its operation for long mission time. In recent years, software fault-tolerant design is becoming important in terms of cost-effectiveness and high-efficiency. In this paper, we propose MPCMCC which is a model-based software component to implement fault tolerance in mission-critical computers. MPCMCC is a fault tolerance design that synchronizes shared data between two computers by using the one-way message-passing scheme which is easy to use and more stable than the shared memory scheme. In addition, MPCMCC can be easily reused for future work by employing the model based development methodology. We verified the functions of the software component and analyzed its performance in the simulation environment by using two mission-critical computers. The results show that MPCMCC is a suitable software component for fault tolerance in mission-critical computers.