• 가족자원경영과 정책
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• 제8권3호
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• pp.113-125
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• 2004

This study aims to provide philosophical frameworks and approaches, and practical guidelines to interview research. While there are some studies which focus on the practical guidelines, there is a lack of studies which address the philosophical and conceptual issues integral to qualitative interview research. By discussing three different but related philosophical aspects of qualitative interviewing--phenomenology, hermeneutics, and dialectics--consistency among research purpose, research method, research methodology is pursued. Based on this discussion, four stages of interviewing--designing, conducting, analyzing, and writing of qualitative interview research--are presented.

• Journal of Advanced Marine Engineering and Technology
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• 제20권2호
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• pp.116-116
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• 1996

This paper is concerned with a method for calibrating five-hole probes of both angle-tube and prismatic geometries to measure local total and static pressures and the magnitude and direction of the mean velocity vector. Descriptions of the calibration technique, the typical calibration data, and an accompanying discussion of the interpolation procedure are included. The flow properties are determined explicitly from measured probe pressures using calibration data. Flow angles are obtained within the deviation angle of 1.0 degree and dynamic pressures within 0.03 with 95% certainty. The variations in the calibration data due to Reynolds number are also discussed. For the range of Reynolds number employed, no effect was detected on the pitch, yaw and total pressure coefficients. However, the static pressure coefficient showed change to cause minor variations in the magnitude of the calculated velocity vector. To account for these variations, average correction factors need to be incorporated into the static pressure coefficient.

• Journal of Advanced Marine Engineering and Technology
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• 제20권2호
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• pp.48-56
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• 1996

This paper is concerned with a method for calibrating five-hole probes of both angle-tube and prismatic geometries to measure local total and static pressures and the magnitude and direction of the mean velocity vector. Descriptions of the calibration technique, the typical calibration data, and an accompanying discussion of the interpolation procedure are included. The flow properties are determined explicitly from measured probe pressures using calibration data. Flow angles are obtained within the deviation angle of 1.0 degree and dynamic pressures within 0.03 with 95% certainty. The variations in the calibration data due to Reynolds number are also discussed. For the range of Reynolds number employed, no effect was detected on the pitch, yaw abd total pressure coefficients. However, the static pressure coefficient showed change to cause minor variations in the magnitude of the calculated velocity vector. To account for these variations, average correction factors need to be incorporated into the static pressure coefficient.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.778-783
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• 2009

In this research, we propose a method to extract scallop areas in seabed images in order to construct a system that can measure automatically the number, size, and state of fishery resources, especially scallops, by analyzing seabed images. Our algorithm is based on information about the hue, characteristic pattern, and the shape of scallop shells. The effectiveness of the proposed method is illustrated through an experiment.

• 한국항공운항학회지
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• 제15권3호
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• pp.70-76
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• 2007

The benefits for using reduced takeoff thrust are many, ranging from lower maintenance and operating costs to improved engine and dispatch reliabilities. Some pilots, however, are apprehensive about using reduced thrust. They are particularly reluctant to use the maximum permissible level of reduced thrust. Two common arguments are (1)If reduced thrust is used, then the airplane will not be able to clear the obstacles if an engine fails during takeoff, and (2)If the maximum allowable assumed temperature is used, then there will be no stopping margin left if the takeoff is aborted. There is the notion that using reduced thrust sacrifices safety. The intent of this discussion is to: (1)Show that reduced thrust performance meets all regulatory requirements (2)Show that the Assumed Temperature method includes inherent extra performance margins (3)Show how to maximize performance margins while maximizing thrust reduction.

• 한국가정과교육학회지
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• 제10권2호
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• pp.79-86
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• 1998

The purpose of this study is to determine the effective teaching method & content of consumer education perceived by high/vocational school students in daily life. The questionnaires were distributed to the 179 high school students. The data were analyzed by using descriptive statistics, t- test and one- way ANOVA with scheffe test. As the results of this study were followed: 1. The content of consumer education was organized into four areas: choice making, financial management, buymanship, consumer citizenship All areas of the content were perceived more effective in daily life by vocational school students Especially choice making and buymanship were perceived more effective than the other areas 2. The effective teaching method were affected by the kind of school and grade. 1) The lecture and the practical teaching were more effective methods perceived by vocational students 2) The discussion group teaching was more effective perceived by 3rd grade, but the leeture and the practical teaching perceived by 1st grade.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1994년도 하계학술대회 논문집 C
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• pp.1286-1288
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• 1994

Methods are described for the design and fabrication of the sensor circuits on the polarographic oxygen sensing electrodes. The discussion includes: a method for the +5V single-supply driving for the sensor circuits, a method of low power comsumption for the front-end electronics. Typical polarograms for the commercial DO probes using this sensor circuits are presented. High accuracy of the I to V conversion using the circuits is verified.

• 복식문화연구
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• 제18권4호
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• pp.687-702
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• 2010

The purpose of this study is to study the inner meaning and formative with distorted and atypical Informel image, body image expressed in modern fashion. Method of the study is as follow. The study method examined philosophy of art 19th century?in order to consider interconnections between social and cultural characteristics of expressionistic abstract art, a form of Informel and changed physical style. Based on this method, the Informel image that appeared in the plastic arts in terms of artistic significance and aesthetic value was examined. Based on the above discussion on modern fashion Informel images were expressed in any formative characteristics were considered. The results of this study are as follows. Contingencies through the spontaneous act of art to transcend the image of atypical lines formed elements of coincidence, was developed. Liberation was expressed from liberation of physical boundaries and created outward expansion of the free formative. Atypical was organic forms pursuing spontaneous plasticity and diversity, and appeared in the form of distortion and deformation.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제22권4호
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• pp.505-514
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• 2008

방정식의 가해성 탐구는 수학사의 중요한 연구주제의 하나였으며, 삼차방정식과 사차방정식의 일반적인 해법은 교사양성기관의 현대대수학 교과에서 다루는 중요한 내용이다. 본 연구에서는 norm형식의 개념을 바탕으로 이차방정식의 근의 공식에 대한 방법유추를 통해 삼차방정식의 근의 공식을 유도하고, 삼차방정식의 근의 공식에 대한 방법유추를 통해 사차방정식의 근의 공식을 유도하였다.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2003년도 학술대회논문집
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• pp.111-116
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• 2003

Recently, power-electronics equipments or machine that microprocessor is included and computers have been installed continuously in industrial process or region of electronics customer. So concern for power quality, especially sags has been increased. Because those equipments are very sensitive to sags. The sag is phenomenon that magnitude of load voltage temporarily decreases because of power system fault. If a certain equipment in industrial process have any trouble result from sag, it can cause utility to be charged for enormous economics loss. Therefore it need to analyze the characteristic of sag and then mitigation method for sags in distribution system in oder to increase reliability. This paper gives an overview of sags characteristic due to short circuit fault in distribution system and after a general discussion of the various forms mitigation, gives a sags mitigation method with concentrating on mitigation-device interface method, especially FCL that is Fault Current Limiter.