• Title/Summary/Keyword: high quality factor

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

  • 정미재;이선재
    • Journal of the Korean Society of Clothing and Textiles
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    • v.21 no.7
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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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    • v.14 no.2
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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.

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

  • Han, Don-Hee;Jeong, Yoon-Sok
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.10 no.1
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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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High Frequency Simulations for the Meander Type Inductors on the MgO and Al2O3 Substrates (산화마그네슘 기판과 산화알루미늄 기판을 이용한 Meander 형태 인덕터의 고주파 시뮬레이션)

  • Ham, Yong-Su;Kim, Sung-Hun;Kang, Ey-Goo;Koh, Jung-Hyuk
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.22 no.8
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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.

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

  • Kim, Mijin;Kim, Giyeong
    • Journal of the Korean BIBLIA Society for library and Information Science
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    • v.26 no.3
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    • pp.241-266
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    • 2015
  • When library performance is regarded as service quality, competency in human resources should be considered as an influential factor. This study aims to identify relationships between job satisfaction of librarians and the service quality that users recognize in public libraries. Librarians and users in 10 public libraries in Seoul, Incheon, Gyeonggi province were sampled to measure job satisfaction and service quality with $LibQUAL+^{TM}$ model. As a result, the higher the satisfaction of the duty itself and organizational factor show a high service quality. Consequently, to improve library customer satisfaction, the librarian's job satisfaction should be considered. Additionally, some practical implications are discussed.

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

  • Kim, Jung-Bin
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.2 no.2
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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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Development of Quality Assessment Tool and Application to Customer-Oriented Hospital Foodservice Management (고객지향적 병원 급식서비스 운영을 위한 질 평가 도구 개발 및 적용)

  • 이해영;장승희;양일선
    • Journal of Nutrition and Health
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    • v.37 no.4
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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.

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

  • 류근관;이문규;염인복;이성팔
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.13 no.1
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    • pp.74-79
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    • 2002
  • The EM(Engineering Model) VCO(Voltage Controlled Oscillator) is nonlinear designed for LO(Local Oscillator) of Ka-band satellite transponder. The microstripline coupled with dielectric resonator is implemented as a high impedance inverter to improve the phase noise, and the quality factor of resonant circuit can be transferred to active device with the enhanced loaded quality factor. The developed VCO has the oscillating tuning range of 9.7965~9.8032 GHz for the control voltage range of 0~12 V. This VCO requires the DC power of 8 V and 17 mA. The phase noise characteristics are -96.51 dBc/Hz @10 KHz and -116.5 dBc/Hz @100 KHz, respectively. And, the output power of 7.33 dBm is measured.

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

  • Kim, In-Soo;Seong, Se-Jin
    • The Transactions of the Korean Institute of Power Electronics
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    • v.12 no.5
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    • pp.409-415
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    • 2007
  • For satisfying a recommended value of the quality factor which is one of the important elements in a filter design, a new design method of smoothing filter using an internal parameter of a homopolar generator is proposed. The method increases the efficiency and minimizes the size of the smoothing filter by removing the damping resistor. By considering the resonant frequency as well as the quality factor, the new method can improve the stability of the system which has high boosting converters with negative resistance characteristics.

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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    • v.17 no.2
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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.