• 제목/요약/키워드: high quality factor

검색결과 1,930건 처리시간 0.032초

의복관여와 상표확장과의 상관성 연구 (A Study on Correlation Between Clothing Involvement and Brand Extension)

  • 정미재;이선재
    • 한국의류학회지
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    • 제21권7호
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    • pp.1124-1138
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    • 1997
  • This study intended to investigate the concept of Clothing Involvement and Brand and to provide useful basic data for building on affective brand strategy. The purpose of this study is as follows: first, It is to measure the result of Brand Extension attitudes and Brand Extension items by clothing involvement (high involvement/low involvement). Second, It is to classify the factors of Clothing Involvement which suggested in theoretical research and to clarify correlation between clothing involvement factor and brand evaluation, brand extension attitudes. Third, It is to investigate the affect that clothing involvement, demographic variable and brand type on Brand Extension Evaluation. Subjects of this study were the adult women in Seoul, who were extracted by sampling randomly during the fall of 1995. Questionnaire was used as major method of gathering data. They were analyzed by the SAS method such as Frequency, Anova, Duncan, Correlation, multiple regression, Factor analysis. Main result of this study were as follows : 1. In brand extension attitude evaluation by high-involve group and low-involve group, quality, reputation and buying intension of brand extension attitudes showed significant difference. B brand extension attitudes and items of high-involve group was high compare to low-involve stoup. High-involve group evaluated watch, underwear, shoes and stocking of extension items highly, and there is no involvement difference of perfume, parasol, cushion. 2. In order to classify the dimension of Clothing Involvement, it was carried out factor analysis. 1 found that Clothing Involvement was composed of 4 factors, namely, interest - fashion.perceived risk symbolism. Correlation between clothing involvement and brand extension attitude was as followed; Interest factor of clothing involvement was correlated the existing brand attitude. Brand preference of the existing brand attitude was related the image of brand extension attitude, interest of advertising was the quality and the reputation-image was the buying intension. 3. For evaluation of a factor influenced on Brand Extension, it was produced multiple -regression test. Demographic variables and brand types had some influence of Clothing Involvement and Clothing Involvement had on brand extension. 27% of interest, 26% of symbolism was explained by brand types and 15% of fashion, 6% of perceived risk was explained by brand types, demographic variables. And, 10% of brand extension was explained by interest, fashion and symbolism.

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A High Gain and High Harmonic Rejection LNA Using High Q Series Resonance Technique for SDR Receiver

  • Kim, Byungjoon;Kim, Duksoo;Nam, Sangwook
    • Journal of electromagnetic engineering and science
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    • 제14권2호
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    • pp.47-53
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    • 2014
  • This paper presents a high gain and high harmonic rejection low-noise amplifier (LNA) for software-defined radio receiver. This LNA exploits the high quality factor (Q) series resonance technique. High Q series resonance can amplify the in-band signal voltage and attenuate the out-band signals. This is achieved by a source impedance transformation. This technique does not consume power and can easily support multiband operation. The chip is fabricated in a $0.13-{\mu}m$ CMOS. It supports four bands (640, 710, 830, and 1,070MHz). The measured forward gain ($S_{21}$) is between 12.1 and 17.4 dB and the noise figure is between 2.7 and 3.3 dB. The IIP3 measures between -5.7 and -10.8 dBm, and the third harmonic rejection ratios are more than 30 dB. The LNA consumes 9.6 mW from a 1.2-V supply.

양질계수(Quality Factor)를 이용한 방진마스크 필터의 성능평가 (Performance of Respirator Filters Using Quality Factor (qF))

  • 한돈희;정윤석
    • 한국산업보건학회지
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    • 제10권1호
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    • pp.170-178
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    • 2000
  • Most of manufacturers try to produce the most efficient filter for respirators with the lowest breathing resistance. Filter performance depends on low penetration, i.e., high efficiency (%), and low pressure drop ($mmH_2O$). This study was performed to evaluate performance of respirator filters by quality factor ($q_F$) and suggest the direction for improvement of respirator filters of good quality in Korea. Two mechanical filters, S and K made in Korea, three filtering facepieces, S made in China, C made in Korea and M made in USA, which were widely used in the workplace, were selected and tested efficiency and pressure drop in accordance with flow rate, using with Automated Filter Tester Model 8110 (TSI, USA). The best quality factor within the same respirator filter categories was $0.0672cm^{-1}\;H_2O$ for mechanical filter S, $0.0698cm^{-1}\;H_2O$ for filtering facepiece M at flow rate of 32Lpm. Mechanical filter S would be the best suitable during heavy work since qulity factors decrease less sharply than any others as increased flow rates. It was necessary for mechanical filter S to lower pressure drop without increasing efficiency, but mechanical filter K should be increased efficiency and decreased pressure drop. While filtering facepiece M had the best quality performance of three ones, Sand C should get much higher efficiency and lower pressure for better performance.

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산화마그네슘 기판과 산화알루미늄 기판을 이용한 Meander 형태 인덕터의 고주파 시뮬레이션 (High Frequency Simulations for the Meander Type Inductors on the MgO and Al2O3 Substrates)

  • 함용수;김성훈;강이구;고중혁
    • 한국전기전자재료학회논문지
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    • 제22권8호
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    • pp.641-644
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    • 2009
  • We have studied on the microwave characteristics for the meander type inductors on the MgO substrates and $Al_2O_3$ substrates by employing 3-D high frequency simulation, respectively. Proper designs of meander type inductors were proposed and confirmed through the high frequency simulations, 5, 7, 9, 11, and 13 turns meander type inductors have been choose to analyze the electrical properties for the microwave passive component applications. The Al top electrodes have 282 nm length, 45 nm width, 100 nm thickness and 15 nm gap. The simulations were carried out from 50 MHz to 30 GHz, Frequency dependent inductances and quality factor were calculated by employing the equivalent circuit model of meander type inductors. The self resonances frequency of meander type inductor were shifted from high frequency to low frequency range as the number of the turn of inductors was increased. From the microwave simulations, the inductances and quality factors of meander type inductors were extracted through the scattering parameter.

공공도서관 직원의 직무만족과 도서관 서비스 품질과의 관계 연구 (A Study on the Relationship between Service Quality and Librarian's Job Satisfaction in Public Libraries)

  • 김미진;김기영
    • 한국비블리아학회지
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    • 제26권3호
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    • pp.241-266
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    • 2015
  • 도서관의 성과를 이용자에게 제공하는 서비스의 품질 강화라고 할 때, 이에 영향을 미치는 요소로서 도서관 내부인적자원의 능력이 검토되어야 한다. 본 연구는 공공도서관 직원의 직무만족과 이용자가 인식하는 서비스 품질간의 관계를 밝히기 위해 서울 인천 경기 지역 10개의 공공도서관을 대상으로 직원의 직무만족도와 $LibQUAL+^{TM}$모형을 적용한 도서관서비스 품질을 조사하였다. 그 결과 직무만족 중 직무자체 요인과 조직요인의 만족도가 높을수록 서비스 품질이 높은 것으로 나타났다. 따라서 도서관 고객 만족도 향상을 위해 직원의 직무만족에 대한 제고가 필요한 것으로 판단되며, 이에 따른 실무적 함의를 논의하였다.

산지별 세척사 특성 (The Properties of Sea Sand with Digging Sources)

  • 김정빈
    • 한국건설순환자원학회논문집
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    • 제2권2호
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    • pp.76-82
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    • 2006
  • High-strength, High-durability concrete appearance was embossed by benevolence who quality for each raw material that become factor that is direct in concrete manufacture and the special quality is very important and request properties of matter were also strengthened more. Specially, natural resources of good quality were abundant past in occasion of aggregate and unlike concrete request strength past that the importance was less relatively the quality enemy than cement because is also not big, importance of aggregate quality great veried as concrete strength and request properties of matter about durability are strengthened more on extreme displacement. Mixing four who is original and mixs special quality examination of domestic three Four-Stick Games by Chaechwiwon and age Four-Stick Games and crushed sand examined concrete quality characteristic that use mortar and concrete quality characteristic, special quality of North Korea sun guardian mountain three Four-Stick Games that is imported from the North Korea, North Korea sun guardian mountain three Four-Stick Games etc..

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고객지향적 병원 급식서비스 운영을 위한 질 평가 도구 개발 및 적용 (Development of Quality Assessment Tool and Application to Customer-Oriented Hospital Foodservice Management)

  • 이해영;장승희;양일선
    • Journal of Nutrition and Health
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    • 제37권4호
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    • pp.329-338
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    • 2004
  • The purposes of this study were to : a) develop the quality assessment tool of hospital foodservice management, b) evaluate the S hospital's foodservice quality by this tool, and c) do the feasibility study about this tool in hospital food-service field by establishing quality management strategies. The developed quality assessment tool of hospital food-service management was consisted of 20 items for quality evaluation by Likert 5 point scale and two additional questions with the most satisfactory item and the most unsatisfactory item. As a result of evaluation, S hospital's foodservice quality was somewhat high, on the factor 'personnel attitude', especially. The IPA technique proved nine items including Q5, Q7, Q8, Q11, Q12, Q13, Q15, Q16, Q17 were in 'Doing Great, Keep It Up' and seven items such as Q1, Q2, Q3, Q6, Q9, Q18, Q19 that got high expectation and low perception needed to be focused in quality management strategy.

위상잡음을 개선한 Ka-band 위성 중계기용 Engineering Model 발진기의 설계 (Design of Engineering Model Oscillator with Low Phase Noise for Ka-band Satellite Transponder)

  • 류근관;이문규;염인복;이성팔
    • 한국전자파학회논문지
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    • 제13권1호
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    • pp.74-79
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    • 2002
  • 본 논문에서는 Ka-band 위성 중계기용 국부 발진기에 사용하게 될 전압제어 발진기의 EM(Engineering Model)을 비선형 방법으로 설계하였다. 전압제어 발진기의 위상잡음을 개선하기 위하여 공진기로 사용되는 유전체 공진기와 결합하는 마이크로스트립 라인을 high impedance inverter로 구현함으로써 공진회로의 quality factor를 우수하게 유지하여 능동소자에 전달되도록 하였다. 개발된 전압제어 발진기는 0~12 V의 제어전압으로 9.7965~9.8032 GHz의 튜닝범위를 가지며 공급전력은 8V, 17mA를 필요로 한다. 제작된 전압제어 발진기의 위상잡음은 -96.51 dBc/Hz ⓐ10 KHz와 -116.5 dBc/Hz ⓐ100 KHz의 특성을 나타내며 출력전력은 7.33 dBm을 얻었다.

단극발전기의 내부 인자를 적용한 평활필터 설계 (Smoothing Filter Design Applying a Parameter of a Homo-polar Generator)

  • 김인수;성세진
    • 전력전자학회논문지
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    • 제12권5호
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    • pp.409-415
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    • 2007
  • 본 논문에서는 필터 설계시 고려해야 될 주요 항목 중 하나인 성능인자 권장값을 만족시키기 위해 단극 발전기의 내부인자 값을 필터 설계에 반영하는 새로운 평활필터 설계방법을 제안한다. 이 방법은 감쇄용 저항을 배제시킴으로서 평활필터의 효율증대 및 소형화를 기한다. 그리고 성능인자와 함께 공진주파수도 함께 고려함으로서 부성저항 특성을 갖는 고승압 변환기 등을 적용한 시스템의 안정성을 증대시킨다.

An approach to design and fabrication of resonant giant magnetostrictive transducer

  • Sheykholeslami, Mohammad R.;Hojjat, Yousef;Cinquemani, Simone;Ghodsi, Mojtaba;Karafi, M.
    • Smart Structures and Systems
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    • 제17권2호
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    • pp.313-325
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    • 2016
  • The paper provides a comprehensive procedure for the mechanical and magnetic design of Langevin transducer based on giant magnetostrictive material. The the transducer is designed to work at its second mode of vibration, having high mechanical quality factor and low damping coefficient. The design procedure is based on an analytical model and it is verified by finite-element analysis. Experimental tests based on impedance response analysis in first and second modes are carried out on the prototype. Results confirm the appropriate design of this transducer, demonstrating the highest mechanical quality factor between the resonant transducers in the literature.