• Title, Summary, Keyword: Quality factor

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Quality Factor: A new Bibliometric Measure for Assessing the Quality of Faculty Research Performance (Quality Factor: 교수연구업적평가를 위한 새로운 계량 지표)

  • Choi, Eun-Ju;Yang, Kiduk;Lee, Hye-Kyung
    • Journal of Korean Library and Information Science Society
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    • v.47 no.2
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    • pp.287-304
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    • 2016
  • This paper introduces a new bibliometric measure called Quality Factor, which assesses multiple facets of faculty research performance. The computation of Quality factor is based on a combination of publication count, citation count, h-index, and Impact Factor. In order to analyze the relationship between Quality Factor and other bibliometric measures (publication count, citation count, h-index, g-index, Impact Factor), the study collected publication data of 189 Korean Library and Information Science professors from 2001 to 2014 to produce the rankings of the faculty by each bibliometric measure and computed Spearman's rank correlations between the rankings. The overall results showed Quality Factor to be correlated to citation-driven measures (citation count, h-index, g-index), but the scatterplot as well as rank-interval analysis showed Quality Factor to be distinctive and more discriminating than other measures.

A Study on the Measurement Methodology of Characteristics of the Vibratory Micro Gyroscope Using the Quality factor and the Resonant Displacement (Quality factor 와 공진시 변위 측정을 이용한 진동형 자이로스코프의 특성 평가에 관한 연구)

  • Jeon, Seung-Hoon;Lee, June-Young;Jung, Hyoung-Kyoon;Chang, Hyun-Kee;Kim, Yong-Kweon
    • Proceedings of the KIEE Conference
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    • pp.2090-2092
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    • 2004
  • In this paper, the new measurement methodology of characteristics of the vibratory micro gyroscope using Quality factor and the resonant displacement was proposed. Because the Quality factor has a large error under the high Quality factor condition, it is difficult to analyze the characteristics of the vacuum packaged vibratory micro gyroscopes with the Quality factor. We analyzed mechanical characteristics of gyroscope with the value of Quality factor. We described measurement errors of mechanical characteristics of micro gyroscopes. The measured value of Quality factor is 47532 and error range of Quality factor is from -29.8 % to 73.9 %. The value of resonant displacement is 3.4${\mu}m$ and the measurement error is 2.9 %. From the result of Quality factor degradation and resonant displacement degradation, 1698 days and 1503 days were estimated as Time To Failure (TTF), respectively. The range of estimation error of Quality factor degradation and resonant displacement degradation is calculated from 1246 days to 1832 days and from 1456 days to 1537 days, respectively. We can analyze the characteristics of the vibratory gyroscope using the quality factor when the Quality factor is smaller than 10,000. Also we can analyze that using the resonant displacement when the Quality factor is larger than 10,000.

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An Factor Analysis of Groundwater in Chongju City (청주시 지하수의 인자분석)

  • 남기창
    • Journal of environmental and Sanitary engineering
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    • v.18 no.4
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    • pp.6-14
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    • 2003
  • A spring water quality was depend on the aquifer soil status. However, water quality was rapidly contaminated by artificial affects. In the contaminate components, the heavy metals were significantly important because the heavy metals influence the plants and the animals. But, it is difficult to find out how the heavy metal can affect in the water quality. According to the group analysis and the factor analysis, water quality management was advanced. The experimental area was divided into three region and six factor. The six factor could not define the overall water quality, however this method were one of the useful methods.

Wafer-Level Packaged MEMS Resonators with a Highly Vacuum-Sensitive Quality Factor

  • Kang, Seok Jin;Moon, Young Soon;Son, Won Ho;Choi, Sie Young
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.14 no.5
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    • pp.632-639
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    • 2014
  • Mechanical stress and the vacuum level are the two main factors dominating the quality factor of a resonator operated in the vacuum range 1 mTorr to 10 Torr. This means that if the quality factor of a resonator is very insensitive to the mechanical stress in the vacuum range, it is sensitive to mainly the ambient vacuum level. In this paper, a wafer-level packaged MEMS resonator with a highly vacuum-sensitive quality factor is presented. The proposed device is characterized by a package with out-of-plane symmetry and a suspending structure with only a single anchor. Out-of-plane symmetry helps prevent deformation of the packaged device due to thermal mismatch, and a single-clamped structure facilitates constraint-free displacement. As a result, the proposed device is very insensitive to mechanical stress and is sensitive to mainly the ambient vacuum level. The average quality factors of the devices packaged under pressures of 50, 100, and 200 mTorr were 4987, 3415, and 2127, respectively. The results demonstrated the high controllability of the quality factor by vacuum adjustment. The mechanical robustness of the quality factor was confirmed by comparing the quality factors before and after high-temperature storage. Furthermore, through more than 50 days of monitoring, the stability of the quality factor was also certified.

A Study of Domestic Construction Quality Management Factor Analysis - (using Covariance Structure Model) (국내건설현장 품질경영 요인 분석에 관한 연구(공분산구조모델을 이용))

  • Kim Tae Sung;Koo Il Seob;Lim Nam Gyu
    • Journal of the Korea Safety Management & Science
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    • v.7 no.3
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    • pp.29-36
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    • 2005
  • This research has been conducted in order to assess the effects on quality management factor of the construction sites. 30 companies abiding by the 'construction industry law' and 32 companies abiding by the 'housing construction promotion law' have been researched in areas of quality-management environment, quality-management understanding, quality-management education on construction field, quality-system and quality-improvement. This construction quality factors are to realized the anticipated results not only quality level's increasing, but also company's confidence, competitiveness. We were able to obtain participations of 62 questionnaire, and derived statistics by means of SPSS/PC version 10.0. In this study, we find the bottleneck factor for promotion and upgrade quality management factor of the construction sites and suggest a way out of difficulties.

Parallel-Branch Spiral Inductors with Enhanced Quality Factor and Resonance Frequency

  • Bae, Hyun-Cheol;Oh, Seung-Hyeub
    • Journal of electromagnetic engineering and science
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    • v.8 no.2
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    • pp.47-51
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    • 2008
  • In this paper, we present a cost effective parallel-branch spiral inductor with the enhanced quality factor and the resonance frequency. This structure is designed to improve the quality factor, but different from other fully stacked spiral inductors. The parallel-branch effect is increased by overlapping the first metal below the second metal with same direction. Measurement result shows an increased quality factor of 12 % improvement. Also, we show an octagonal parallel-branch inductor which reduces the parasitic capacitances for higher frequency applications.

A Study of Practical Field Application Cryptographic Module through Evaluation Derived by Connection Indicators (품질 연계지표 평가방법을 사용한 암호화 모듈 실무현장 적용체계 연구)

  • Noh, SiChoon;Na, SangYeob
    • Convergence Security Journal
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    • v.14 no.4
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    • pp.55-60
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    • 2014
  • In this study, we propose a cryptographic module quality evaluation system referenced by ISO/IEC 9000 quality system with Quality, Quality Factor, Quality Subfactor, Metric. Practical application process encryption algorithm based on the encryption algorithm to encrypt the pros and cons valuation of diagnosis, point selection algorithm, analysis, and quality items(quality factor), eliciting constraints derived, such as the cryptographic module design quality evaluation system is set to step 5. The five steps are examples of field-based diagnostic tool for cryptographic operations, the most essential work to be done in order to derive one will work. 2-Factor encryption module for connection between indicator items(quality factor) to identify and ensure the quality of the item the constraints of the environment are two kinds of cryptographic operations. This study is an encryption module and a practical field application system, it presents the standardized model. We have to meet the rapid changes in information technology. The environment, development and the encryption algorithm applied to model a wide variety of on-site development encryption will be able to expect the efficiency.

A Study on Tuning Factor(δ) and Quality Factor(Q) Values in Design of Single-Tuned Passive Harmonic Filters (단일동조 수동고조파필터 설계시의 동조계수(δ) 및 양호도(Q)값 연구)

  • Cho, Young-Sik;Cha, Han-Ju
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.59 no.1
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    • pp.64-70
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    • 2010
  • This paper presents how to decide on tuning factor(${\delta}$) and quality factor(Q) values in design of single-tuned passive harmonic filters. Tuning factor(${\delta}$) and quality factor(Q) values have to consider before decision on circuit parameters of passive filters. A Study on these two value has not been scarcely performed and only experienced values has been used in passive harmonic filter design by far. As a experienced value, in cases of 5th and 7th filter, tuning factor(${\delta}$) is about 0.94 and 0.96 respectively and quality factor(Q) is, in all cases of, 50. If Single-tuned passive harmonic filter will be off-tuned, performance of filter will be decreased steeply and occur to parallel resonance between system reactance and filter capacitance. Therefore During the operation, In order not to off-tuning, Filter must be tuned at former order than actual tuning order. This is the same that total impedance of filter must have a reactive impedance. In this paper, Tuning factor(${\delta}$) is decided via example of real system and using the bode-plot and then performance of filters confirmed by filter current absorbtion rate. And Quality factor(Q) decided using the bode plot in example system and then performance of filters confirmed by filter current absorbtion rate also, which makes a calculated filter parameters to satisfy IEEE-519 distortion limits. Finally, Performance of the designed passive harmonic filter using the tuning factor(${\delta}$) and quality factor(Q) values, decided in this paper is verified by experiment and shows that 5th, 7th, 9th, 11th and 13th current harmonic distortions are decreased within IEEE-519 distortion limits, respectively.

A Study of Domestic Construction Quality Management Factor Analysis using Covariance Structure Model (공분산구조모델을 이용한 건설현장 품질경영 요인 분석)

  • Koo Il Seob;Kim Tae Sung;Lim Nam Gyu
    • Proceedings of the Safety Management and Science Conference
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    • pp.467-475
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    • 2005
  • This research has been conducted in order to assess the effects on quality management factor of the construction sites. 30 companies abiding by the 'construction industry law' and 32 companies abiding by the 'housing construction promotion law' have been researched in areas of quality-management environment, quality-management understanding, quality-management education on construction field, quality-system and quality-improvement. This construction quality factors are to realized the anticipated results not only quality level's increasing, but also company's confidence, competitiveness. We were able to obtain participations of 62 questionnaire, and derived statistics by means of SPSS/PC version 10.0. In this study, we find the bottleneck factor for promotion and upgrade quality management factor of the construction sites and suggest a way out of difficulties.

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Analysis of Quality factor and Effective inductance of Inductor for RF Integrated Circuits in 90nm CMOS Technology (RFIC 설계에 응용 가능한 90nm 공정 기반 인덕터의 Quality factor 및 Effective inductance 분석)

  • Jang, Seong-Yong;Shin, Jong-Kwan;Kwon, Hyuk-Min;Kwon, Sung-Kyu;Sung, Seung-Yong;Hwang, Sun-Man;Jang, Jae-Hyung;Lee, Ga-Won;Lee, Hi-Deok
    • Journal of the Institute of Electronics and Information Engineers
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    • v.50 no.5
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    • pp.128-133
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    • 2013
  • In this paper, octagonal inductors for RFIC designs was fabricated with 90nm CMOS Technology to compare its quality factor and the effective inductance as functions of radius and number of turn. The quality factor decreases as the inner radius and the number of metal turned increase. However, the effective inductance increases with the increasing the inner radius and the number of metal turned. Therefore, the inductor structure should be decided according to the relative importance of Q-factor and inductance.