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Single-ended amplifier-based touch readout circuit with immunity to display noise
Yoo Yongsang,Choi Byong-Deok 한국정보디스플레이학회 2023 Journal of information display Vol.24 No.2
To suppress errors in a touch readout circuit due to display noise, differential sensing using fully differential amplifiers is widely used. However, conventional differential sensing methods require additional circuits or increase circuit complexity, thus increasing power consumption and circuit area or requiring additionaldummyRX line on the touch panel. In this study, we propose a compact touch readout circuit composed of a single-ended amplifier while keeping the display noise suppression of differential sensing so as to minimize power consumption and circuit area increase and avoid the need for additional dummy RX line. The proposed touch readout circuit for is fabricated in circuit area of 0.4mm2 with 0.35μm 3.3 V CMOS process and measured for 10.1-inch touch panel on top of a TFT-LCD panel. With the proposed touch readout circuit, the signal-to-noise ratio (SNR) is improved by up to 13.1 dB compared to the conventional touch readout circuit using single-ended amplifiers.
유은정,김종덕,송상호,임현수,최명락,정규화 여수대학교 1997 論文集 Vol.11 No.2
The purpose of this investigation was to develop a new carrier using chitin and glucan as the model for Aspergillus oryzae cell wall. In case of the ratio of chitin and glucan(3/1), the activity of the immobilized protease had higher than that of model(chitin/glucan=1/3) and carriers were formed gel. In case of soluble chitin and glucan treated with calcium carbonate, there were a 1.8-fold increase in activity of immobilized protease compared with untreated chitin. The scanning electron microscope image showed that a pore size of this carrier had a homogenized pore size and a smooth surface.
Screening for Prediabetes Using Machine Learning Models
Choi, Soo Beom,Kim, Won Jae,Yoo, Tae Keun,Park, Jee Soo,Chung, Jai Won,Lee, Yong-ho,Kang, Eun Seok,Kim, Deok Won Hindawi Publishing Corporation 2014 Computational and mathematical methods in medicine Vol.2014 No.-
<P>The global prevalence of diabetes is rapidly increasing. Studies support the necessity of screening and interventions for prediabetes, which could result in serious complications and diabetes. This study aimed at developing an intelligence-based screening model for prediabetes. Data from the Korean National Health and Nutrition Examination Survey (KNHANES) were used, excluding subjects with diabetes. The KNHANES 2010 data (<I>n</I> = 4685) were used for training and internal validation, while data from KNHANES 2011 (<I>n</I> = 4566) were used for external validation. We developed two models to screen for prediabetes using an artificial neural network (ANN) and support vector machine (SVM) and performed a systematic evaluation of the models using internal and external validation. We compared the performance of our models with that of a screening score model based on logistic regression analysis for prediabetes that had been developed previously. The SVM model showed the areas under the curve of 0.731 in the external datasets, which is higher than those of the ANN model (0.729) and the screening score model (0.712), respectively. The prescreening methods developed in this study performed better than the screening score model that had been developed previously and may be more effective method for prediabetes screening.</P>
결정질 실리콘 태양전지의 도핑 최적화를 위한 선 증착 온도에 대한 연구
최성진(Choi Sung-Jin),송희은(Song Hee-Eun),유권종(Yoo Kwon-Jong),유진수(Yoo Jin-Soo),한규민(Han Kyu-Min),권준영(Kwon Jun-Young),이희덕(Lee Hi-Deok) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.11
In this paper, the optimized doping condition of mono crystalline silicon solar cells with 156 × 156 ㎟ area was studied. To optimize the pre-deposition temperature in the doping process, the other conditions except variable pre-deposition temperature were fixed. These conditions were obtained in previous studies. After etching 7 μm of the surface to form the pyramidal structure, pre-deposition temperature was changed in range of 780 ℃ to 820 ℃ with 10 ℃ increment and drive-in temperature were fixed at 865 ℃. The silicon nitride deposited by the PECVD had 75 nm thickness with 2-2.1 refractive index. The silver and aluminium electrodes for front and back sheet, respectively, were formed by screen-printing method, followed by firing in 400-425-450-550-880 ℃ five-zone temperature conditions to make the ohmic contact. Mono crystalline silicon solar cell made in 790 ℃ as the pre-deposition temperature revealed 16.9 % conversion efficiency which was best in this study. This solar cells showed 34.78 ㎃/㎠ of the current density, 629 ㎷ of the open circuit voltage and 77.1 % of the fill factor.
PC1D simulation을 이용한 결정질 실리콘 태양전지의 도핑 최적화
최성진(Choi SUNG-Jin),유진수(Yoo Jin-Su),유권종(Yoo Kwon-Jong),한규민(Han Kyu-Min),권준영(Kwon Jun-Young),이희덕(Lee Hi-Deok) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.4
Doping process of crystalline silicon solar cell process is very important which is as influential on efficiency on solar cell. Using PC1D simulator we optimized the solar cell to get the high efficiency, by adjusting doping condition(sheet resistance, concentration of dopant, junction depth). The PC1D simulation's fix condition are area(240㎠), thickness(200㎛), reflectance rate(7%), pyramid size(3㎛), resistance, recombination rate and measurement condition. Efficiency is measured with various sheet resistances. Under the optimized condition, the solar cell showed a high efficiency 18.17%.
단결정 실리콘 태양전지의 도핑 최적화를 위한 확산 온도에 대한 연구
최성진(Choi Sung-Jin),송희은(Song Hee-Eun),유권종(Yoo Kwon-Jong),유진수(Yoo Jin-Soo),한규민(Han Kyu-Min),권준영(Kwon Jun-Young),이희덕(Lee Hi-Deok) 한국태양에너지학회 2011 한국태양에너지학회 논문집 Vol.31 No.1
In this paper, the optimized doping condition of crystalline silicon solar cells with 156 × 156㎟ area was studied. To optimize the drive-in temperature in the doping process, the other conditions except variable drive-in temperature were fixed. These conditions were obtained in previous studies. After etching 7㎛ of the surface to form the pyramidal structure, the silicon nitride deposited by the PECVD had 75∼80㎚ thickness and 2 to 2.1 for a refractive index. The silver and aluminium electrodes for front and back sheet, respectively, were for medby screen-printing method, followed by firing in 400-425-450-550-850℃ five-zone temperature conditions to make the ohmic contact. Drive-in temperature was changed in range of 830℃ to 890℃ to obtain the sheet resistance 30∼70Ω/□ with 10Ω/□ intervals. Solar cell made in 890℃ as the drive-in temperature revealed 17.1% conversion efficiency which is best in this study. This solar cells showed 34.4 ㎃/㎠ of the current density, 627 ㎷ of the open circuit voltage and 79.3% of the fill factor.