http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Polysilicon Thin Film Transistor Modelling: High Field Effects and Terminal Capacitances
Quinn, M.,Migliorato, P.,Tam, S.,Reita, C. 대한전자공학회 1993 ICVC : International Conference on VLSI and CAD Vol.3 No.1
The differences in behaviour between polysilicon and crystalline silicon field effect transistors make it impossible to use standard circuit simulators as design cools. Four terminal crystalline models cannot accurately describe the operation of polysilicon transistors which are .real three terminal devices, with no body or back gate present. For this reason the conventional MOSFET model is unable to cape with effects such as those caused by floating substrates. Furthermore due to the differing physical mechanisms dominating in these devices, effects considered second order in the treatment of crystalline MOSFETs, such as sub-threshold conduction, channel length modulation arid various field induced generation mechanisms play an important role in the electrical characteristics of polysilicon devices. Therefore a new approach is required when dealing with polysilicon Thin Film Transistors (TFTs).
The effect of small embankments on wind speeds
Quinn, A.D.,Robertson, A.P.,Hoxey, R.P.,Short, J.L.,Burgess, L.R.,Smith, B.W. Techno-Press 1998 Wind and Structures, An International Journal (WAS Vol.1 No.4
Full-scale measurements have been made to determine the increase in wind speed over two exposed embankments, one of $23^{\circ}$ slope and 4.7 m in height, the other of $24^{\circ}$ slope and 7.3 m in height. Measurements were made at heights of 5, 10 and 15 m above the upper edge of each embankment and at the same heights approximately 100 m upwind in the lower-level approach fetch. Despite the modest sizes of the embankments, the maximum recorded increase in mean wind speed was 28% and the minimum was 13%; these increase relate to increases in wind loads on structures erected at the top of the embankments of 64% and 28% respectively. The associated increases in gust speeds are estimated at 33% and 18%, which imply increases in gust loading of 77% and 39% respectively. These experimental results are compared with predictions obtained from a computational fluid dynamics (CFD) analysis, using three high Reynolds number eddy-viscosity models and estimates from the UK wind loading code, BS 6399: Part 2. The CFD results are generally in agreement with the experimental data, although near-ground effects on the embankment crest are poorly reproduced.
Quinn McCormick,Leslie Pitts,Zachary Hughes 대한소아내분비학회 2019 Annals of Pediatirc Endocrinology & Metabolism Vol.24 No.4
Purpose: Newborn screening (NBS) methods to detect congenital hypothyroidism (CH) vary regarding whether total thyroxine (T4), thyroid stimulating hormone (TSH), or both are measured. Neonates with low T4 and normal or low TSH (lowT4/TSH) may only be detected by T4-inclusive methods or age-dependent repeat screens. Premature neonates and those with pituitary-hypothalamic disorders frequently manifest lowT4/TSH. Methods: This is a retrospective case-study of newborns who were screen-positive for lowT4/TSH in Alabama in 2009–2016 using a combined T4 and TSH method and 2 routine NBS. The clinical, laboratory, and final diagnosis after 3 years were determined. Results: Over 8 years, 225 infants were referred to our institution for evaluation and treatment of CH. Twelve infants were screen-positive for lowT4/TSH by first or second NBS. Four of the 12 infants had permanent CH (30%): 2 with primary and 2 with central etiologies. One infant with moderately severe central CH was only detected by the routine second NBS. Six of 7 premature infants had elevated TSH on serum confirmation labs consistent with a delay in hypothalamic-pituitary maturation, yet 2 of these patients were later established to have permanent primary CH. While most cases of lowT4/TSH resolved by 3 years of age, several neonates had extended periods of moderate to severe hypothyroxinemia prior to detection and treatment. Conclusion: One third of the infants with lowT4/TSH on NBS in this study had permanent CH. These results emphasize the importance of T4-based assay methods, subsequent (repeat) screens and long-term follow-up in the management of neonates with lowT4/TSH on newborn screen.
Modelling the dispersion of a tracer gas in the wake of an isolated low-rise building
Quinn, A.D.,Wilson, M.,Reynolds, A.M.,Couling, S.B.,Hoxey, R.P. Techno-Press 2001 Wind and Structures, An International Journal (WAS Vol.4 No.1
Mean concentrations of ammonia gas released as a tracer from an isolated low-rise building have been measured and predicted. Predictions were calculated using computational fluid dynamics (CFD) and two dispersion models: a diffusion model and a Lagrangian particle tracking technique. Explicit account was taken of the natural variation of wind direction by a technique based on the weighted summation of individual steady state wind direction results according to the probability density function of the wind direction. The results indicated that at distances >3 building heights downstream the weighted predictions from either model are satisfactory but that in the near wake the diffusion model is less successful. Weighted solutions give significantly improved predictions over unweighted results. Lack of plume spread is identified as the main cause of inaccuracies in predictions and this is linked to inadequate resolution of flow features and mixing in the CFD model. Further work on non-steady state simulation of wake flows for dispersion studies is recommended.
Standardization of Fracture Toughness Testing of Ceramics in the United States
Quinn, G.D.,Jenkins, M.J.,Salem, J.,Bar-On, I. The Korean Ceramic Society 1998 The Korean journal of ceramics Vol.4 No.4
American Society for Testing and Materials (ASTM) standard test method PS 070-97 has been created for measuring fracture toughness of advanced ceramics. PS 070-97 includes three test methods which use beams in bending: chevron notch (CNB), single-edged precracked beam (SEPB), and surface crack in flexure (SCF). Supporting data has been collected through several Versailles Advanced Materials and Standards round robins. This paper discusses the evolution of the standard including the rationale for the choice of the three methods and the specifications in the standard. Progress on Standard Reference material 2100 which will have certified values of fracture toughness is presented.
Morris, Quinn,Shivaji, Ratnasingham,Sim, Inbo Cambridge University Press 2018 Proceedings. Section A, Mathematics Vol.148 No.2
<P>We prove the existence of positive radial solutions to a class of semipositone <I>p</I>-Laplacian problems on the exterior of a ball subject to Dirichlet and nonlinear boundary conditions. Using variational methods we prove the existence of a solution, and then use <I>a priori</I> estimates to prove the positivity of the solution.</P>