노년 청각손상자와 청각장애의 삶의 질 관련성 연구

劉俊榮,張勝成 대구대학교 특수교육재활과학연구소 2006 再活科學硏究 Vol.24 No.2

The hearing impairment happened extensively in the elderly and often resulted in the hearing handicap. A lot of study confused the hearing impairment with the hearing handicap and replaced the score of quality of life by the hearing handicap score to calculate the quality adjusted life years and analyzed the cost-utility of aural rehabilitation. In this study, the confusion of hearing impairment and hearing handicap was clarified, and the relevance between hearing handicap and quality of life was explored in order to examine the fitness of replacing the score of quality of life by the hearing handicap score. The result of this study indicated that the correlation between the hearing handicap and the quality of life. The fitness of correlating model of the hearing handicap and the quality of life was not accepted. So, it was not suggested that replacing the score of quality of life by the hearing handicap score. The inventory of disease-specific quality of life should be developed. Secondly, the poor fitness of correlating model of the hearing handicap and the quality of life could be resulted from the other variables that shall be included in the model. It was proposed to include relevant variables into the model in the future. 청각손상은 노년기에 광범위하게 발생하는 문제이다. 심각한 청각장애를 자주 일으킨다. 많은 연구는 청각손상과 청각장애를 혼돈하는 것 뿐 만아니라 자주 청각장애 검목표의 득점으로 피실험자의 생활 품질을 대표한다. 심지어 청각장애 검목표의 득점으로 생활 품질 조정년을 계산한다. 이것으로 청각 재활의 성공 효과를 분석한다. 본 연구는 청각 손상과 청각장애의 다른 점을 밝히는 것 외에도 주요 목적은 청각장애와 생활 품질의 관련성을 이해하고자 하는 것이다. 이것으로 청각장애 검목표를 생활 품질을 삼는 정당성을 관찰한다. 연구결과에 나타나는 것은 청각 표현과 생활품질의 관련성은 높지 않은 결과를 얻었다. 이 두 가지의 관련 양식은 일반화 하기는 제한점을 갖는다. 그래서 이론적 개념에서 청각 표현과 생활품질은 각자 다른 내용을 갖추고 있다. 자료 통계의 분석 결과도 이 두 가지의 관련 양식에 대해서 유의한 결과를 얻지 못했다. 그래서 청각표현 능력으로 피실험자의 생활 품질을 대신할 수 없다. 마땅히 청각 손상자에게 맞는 적합한 생활 품질 설문지를 발행해야한다. 그 다음에 두 가지의 관련 양식의 관련도 적다. 아마도 청각 손상자의 청각 표현과 생활 품질 간에는 많은 변인의 영향이 존재하기 때문이다. 미래의 연구는 더 많은 상관 관련 인소를 귀납해서 이 이론구조를 검증해야한다는 것을 건의한다.

A Novel Single-Stage Cost-Effective Electronic Ballast for HID Lamps with High Power Factor

Chun-An Cheng,Chen-Wei Ku 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5

High-intensity-discharge (HID) lamps are widely utilized in a variety of lighting circumstances that need high luminance. This paper proposes a single-stage electronic ballast for HID lamps; the ballast offers power factor correction and is acoustic-resonance-free. The presented HID lamp ballast integrates a discontinuous-conduction-mode (DCM) operated bridgeless power factor correction (PFC) converter for shaping the input utility-line current with a high/low-frequency square-wave-driven half-bridge inverter for supplying low-frequency square-wave sources to the HID lamp. The features of the proposed ballast are high power factor, low total harmonic distortion (THD) of the input current, cost-effectiveness, and that it is free of acoustic resonance. This paper analyzes the operational modes, key design guidelines and experimental results of the proposed ballast for a 70W HID lamp operating with 110V-rms input utility-line voltage.

Mathematical Thinking through the Grouping of Numbers

( Chun Chor Li Twin Cheng ) 한국수학교육학회 2014 뉴스레터 Vol.30 No.2

A Single-Stage LED Tube Lamp Driver with Input-Current Shaping for Energy-Efficient Indoor Lighting Applications

Cheng, Chun-An,Chang, Chien-Hsuan,Cheng, Hung-Liang,Chung, Tsung-Yuan,Tseng, Ching-Hsien,Tseng, Kuo-Ching The Korean Institute of Power Electronics 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.4

This study proposes a single-stage light-emitting diode (LED) tube lamp driver with input-current shaping for T8/T10-type fluorescent lamp replacements. The proposed AC-DC LED driver integrates a dual-boost converter with coupled inductors and a half-bridge series-resonant converter with a bridge rectifier into a single-stage power conversion topology. This paper presents the operational principles and design considerations for one T8-type 18 W-rated LED tube lamp with line input voltages ranging from 100 V rms to 120 V rms. Experimental results for the prototype driver show that the highest power factor (PF = 0.988), lowest input current total harmonic distortion (THD = 7.22%), and highest circuit efficiency (η = 92.42%) are obtained at an input voltage of 120 V. Hence, the proposed driver is feasible for use in energy-efficient indoor lighting applications.

Ceyuan (測圓海鏡) and Jiuyong Yandai (九容演代)

Cheng, Chun Chor Litwin The Korean Society for History of Mathematics 2014 Journal for history of mathematics Vol.27 No.1

The book ${\ll}$Ceyuan Haijing${\gg}$ studies inscribed and circumscribed circles in a right triangle and shows equations that give the diameters of the circles. We discuss the development of mathematical contents written by the scholar Yang Zhaoyun in Qing dynasty on the contents of ${\ll}$Ceyuan Haijing${\gg}$ in his book ${\ll}$Jiuyong Yandai${\gg}$. He derived equations to find the diameters of the circles based on algebraic knowledge known in the Qing dynasty. In this paper, we conclude that Yang's methods in devising the equations include the Gou-Gu Theorem, mathematical expressions derived from Gou-Gu ratio table, and the technique of interchanging triangles and events. We conclude that the Gou-Gu ratio table was a very important tool when Yang devised the equations in ${\ll}$Ceyuan Haijing${\gg}$.

Predictive Value of XRCC1 and XRCC3 Gene Polymorphisms for Risk of Ovarian Cancer Death After Chemotherapy

Cheng, Chun-Xia,Xue, Min,Li, Kai,Li, Wu-Sheng Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.6

Objective: To investigate any association between XRCC1 and XRCC3 polymorphisms and outcome of platinum-based chemotherapy in ovarian cancer patients. Methods: With a prospective study design was cases were consecutively collected from January 2005 to January 2007. All 310 included patients were followed-up until the end of January 2010. Genotyping of XRCC1 and XRCC3 polymorphisms was conducted by TaqMan Gene Expression assays. Results: A total of 191 patients died during follow-up. Our study showed a lower survival rate in XRCC1 399 Arg/Arg genotype than Gln/Gln, with a significant increased risk of death (HR=1.69, 95%CI=1.07-2.78). Similarly, those carrying XRCC3 Thr/Thr genotype had a increased risk as compare to the Met/Met genotype, with a HR (95% CI) of 1.90 (1.12-3.41). There was no significant association between XRCC1 Arg194Trp and XRCC1Arg280His gene polymorphisms and ovarian cancer death. Conclusion: Our study demonstrates that polymorphisms in DNA repair genes have roles in the susceptibility and survival of ovarian cancer patients.

Mathematical Thinking through the Grouping of Numbers

( Cheng Chun Chorlitwin ) 한국수학교육학회 2014 수학교육 학술지 Vol.2014 No.1

Both counting and thinking are important process for the development of mathematics ability. Counting on and counting all is a important step for children to acquire the knowledge of addition, while grouping numbers into 10 is important for developing thinking and concept of place value. The general view is that the ability in combining and disjoining sets of objects helps to develop the concepts of place value. The ability of countingon and grouping numbers into 10 is important, because it requires the selection of numbers during grouping and hence requires thinking. This paper is a report of the observation of three children of age 5.5 to 6 during their activities of grouping into 10, and analyze how the activities help to make happen the mathematical thinking of the children.

The feasibility of detecting endometrial and ovarian cancer using DNA methylation biomarkers in cervical scrapings

Cheng-Chang Chang,Hui-Chen Wang,Yu-Ping Liao,Yu-Chih Chen,Yu-Chun Weng,Mu-Hsien Yu,Hung-Cheng Lai 대한부인종양학회 2018 Journal of Gynecologic Oncology Vol.29 No.1

Objective: We hypothesized that DNA methylation of development-related genes may occur in endometrial cancer (EC)/ovarian cancer (OC) and may be detected in cervical scrapings. Methods: We tested methylation status by quantitative methylation-specific polymerase chain reaction for 14 genes in DNA pools of endometrial and OC tissues. Tissues of EC/normal endometrium, OC/normal ovary, were verified in training set using cervical scrapings of 10 EC/10 OC patients and 10 controls, and further validated in the testing set using independent cervical scrapings in 30 EC/30 OC patients and 30 controls. We generated cutoff values of methylation index (M-index) from cervical scrapings to distinguish between cancer patients and control. Sensitivity/specificity of DNA methylation biomarkers in detecting EC and OC was calculated. Results: Of 14 genes, 4 (PTGDR, HS3ST2, POU4F3, MAGI2) showed hypermethylation in EC and OC tissues, and were verified in training set. POU4F3 and MAGI2 exhibited hypermethylation in training set were validated in independent cases. The mean M-index of POU4F3 is 78.28 in EC and 20.36 in OC, which are higher than that in controls (6.59; p<0.001 and p=0.100, respectively), and that of MAGI2 is 246.0 in EC and 12.2 in OC, which is significantly higher that than in controls (2.85; p<0.001 and p=0.480, respectively). Sensitivity and specificity of POU4F3/MAGI2 were 83%–90% and 69%–75% for detection of EC, and 61% and 62%–69% for the detection of OC. Conclusion: The findings demonstrate the potential of EC/OC detection through testing for DNA methylation in cervical scrapings.

Study of PD Location in Generators by PD Pulses Propagation

Cheng, Yang-Chun,Li, Cheng-Rong,Wang, Wei The Korean Institute of Electrical and Electronic 2006 Transactions on Electrical and Electronic Material Vol.7 No.5

When a partial discharge takes place at the stator of a generator, the electrical pulse will propagate along the stator bars and the capacitor chains formed by the end part of the stator winds. On the first path, the pulse propagates as a travel wave at slow speed. On the second path, the pulse propagates at quick speed. Based on the data of the experiments on a real 50 MW steam generator, the author has found the pulses can propagate by magnetic field of the stator winding. It was studied that how to locating the partial discharge by signals coming from the different paths, including the features of signals on the two paths at time domain and frequency domain, the measurement frequency rang of the signals, the blind area, the advantage and disadvantage of this method.

Low power resistive random access memory using interfaceengineered dielectric stack of SiOx/a-Si/TiOy with 1D1R-like structure

Chun-Hu Cheng,K.I. Chou,Zhi-Wei Zheng,Hsiao-Hsuan Hsu 한국물리학회 2014 Current Applied Physics Vol.14 No.1

In this study, we report a resistive random access memory (RRAM) using trilayer SiOx/a-Si/TiOy film structure. The low switching energy of <10 pJ, highly uniform current distribution (<13% variation), fast 50-ns speed and stable cycling endurance for 106 cycles are simultaneously achieved in this RRAM device. Such good performance can be ascribed to the use of interface-engineered dielectric stack with 1D1R-like structure. The SiOx tunnel barrier in contact with top Ni electrode to form diode-like rectifying element not only lowers self-compliance switching currents, but also improves cycling endurance, which is favorable for the application of high-density 3D memory.