441 research outputs found
Orthogonality Relations and Cherednik Identities for Multivariable Baker-Akhiezer Functions
No full textAuthor Manuscript 27 Feb 2013We establish orthogonality relations for the Baker–Akhiezer (BA) eigenfunctions of the Macdonald difference operators. We also obtain a version of Cherednik–Macdonald–Mehta integral for these functions. As a corollary, we give a simple derivation of the norm identity and Cherednik–Macdonald–Mehta integral for Macdonald polynomials. In the appendix written by the first author, we prove a summation formula for BA functions. We also consider more general identities of Cherednik type, which we use to introduce and construct more general, twisted BA functions. This leads to a construction of new quantum integrable models of Macdonald–Ruijsenaars type.National Science Foundation (U.S.) (Grant DMS-1000113
Design and development of a mechatronic training simulator for adult ECMO
No full textWidespread adoption of Extracorporeal Membrane Oxygenation (ECMO) in adults has been limited by unfamiliarity with the procedure, including cannulation and safe handling of the ECMO equipment. We present the design and development of a mechatronic training simulator for ECMO that can help medical professionals acquire the needed skills, gain familiarity, and reduce errors by practicing before performing the procedure on real patients. The trainer is designed as an ultrasound-compatible, wholesome simulator with realistic components such as synthetic blood vessels, cannulation pads, and a color-changing blood simulant to simulate oxygenation and deoxygenation. The simulator is integrated with a mathematical model of human physiology to simulate real-time patient vitals and training scenarios, and to control the trainer hardware. We present results related to successful cannulation under ultrasound scanning and a simple patient scenario of hypovolemia.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2021-05-01The student, Iti Mehta, accepted the attached license on 2019-04-24 at 10:58.The student, Iti Mehta, submitted this Thesis for approval on 2019-04-24 at 11:11.This Thesis was approved for publication on 2019-04-24 at 12:45.DSpace SAF Submission Ingestion Package generated from Vireo submission #13873 on 2019-08-22 at 15:08:02Made available in DSpace on 2019-08-23T20:36:09Z (GMT). No. of bitstreams: 2
MEHTA-THESIS-2019.pdf: 84393765 bytes, checksum: 74f0edf247057995595372eb8076e513 (MD5)
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Previous issue date: 2019-04-24Embargo set by: Seth Robbins for item 112203
Lift date: 2021-08-23T20:36:18Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 112203 on 2021-08-24T09:15:24Z
Design and implementation of a phase locked loop for high-speed serial links
No full textThe student, Rushabh Mehta, accepted the attached license on 2016-04-25 at 13:40.The student, Rushabh Mehta, submitted this Thesis for approval on 2016-04-25 at 13:46.This Thesis was approved for publication on 2016-04-27 at 14:52.DSpace SAF Submission Ingestion Package generated from Vireo submission #9475 on 2016-07-07 at 13:50:45Made available in DSpace on 2016-07-07T20:27:59Z (GMT). No. of bitstreams: 2
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LICENSE.txt: 4210 bytes, checksum: e6aea67d4e02d64f06671bb40ada2274 (MD5)
Previous issue date: 2016-04-27Recent advances in the semiconductor industry and process technology scaling have increased the demand for fast, robust computing. The thirst for high-processing, low power ICs is ever increasing. This has pushed the demand for high data rates in wireless and wireline communication systems in the multi-Gbps range. With higher data rates, the I/O links need to scale proportionally. However, the I/O channel bandwidth has not scaled appropriately making it the biggest bottleneck in high-speed links. Parallel links have not been able to match this increasing system performance due to issues such as crosstalk, timing skew and packaging costs. Thus there is a need for high-speed serial links. For high-speed transmission of data, there arises a need for high-speed on chip clocking circuits making the use of Phase-Locked Loops (PLLs) imperative.
This thesis includes an overview of high-speed links along with the need for PLLs. An in-depth understanding of PLL theory, loop dynamics and behavioral and transistor level simulation follows. Performance metrics such as phase noise, random jitter and deterministic jitter are discussed. Finally, this thesis concludes with an insight into All Digital Phase-Locked Loops (ADPLLs).Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2018-05-01Embargo set by: Seth Robbins for item 93174
Lift date: 2018-07-07T20:28:14Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 93174
Lift date: 2018-07-07T20:35:34Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 93174 on 2018-07-08T09:15:20Z
The design of a sensitive probe for mass flux measurements of water vapor in air
No full textThis investigation pertains to the construction and investigation of a sensitive probe to determine the possibility of measuring the mass flux of water vapor in air under non-flow steady state conditions. The probe was a small electrolysis cell is which the electrolyte (partially hydrated phosphorus pentoxide) was used as the sensing element. The rate of mass transfer was determined by measuring the amount of direct current flowing through the acid film --Abstract, page i
Visual outcomes of bilateral congenital and developmental cataracts in young children in south India and causes of poor outcome.
No full textCONTEXT: Bilateral pediatric cataracts are important cause of visual impairment in children. AIM: To study the outcome of bilateral pediatric cataract surgery in young children. SETTING AND DESIGN: Retrospective case series in a tertiary center. MATERIALS AND METHODS: Records of pediatric cataracts operated between January 2001 and December 2003, with a minimum follow-up of 3 months, were reviewed retrospectively. STATISTICAL METHODS: Independent sample t-test, Fisher's exact test, and logistic regression using SPSS (Statistical Package for Social Science, Chicago, USA) version 12. RESULTS: 215/257 (83.7%) patients had a minimum follow-up of 3 months. The mean age of presentation to the hospital was 53 months (range: 0-168 months). Congenital cataract was present in 107 patients (58.2%) and developmental cataract in 77 patients (41.8%). The mean age at surgery was 55.2 months (range: 1-168 months). Out of 430 eyes, 269 (62.6%) had an intraocular lens implanted. The mean duration of follow-up was 13.1 months (range: 3-38 months). Pre-operatively, 102 patients (47.3%) had visual acuity 6/18. The most common early post-operative complication was fibrinous uveitis in 57 eyes (13.3%) and the most common delayed post-operative complication was posterior capsular opacification in 118 eyes (27.4%). The most important prognostic factor for poor outcome was congenital cataract (odds ratio [OR]: 26.3; 95% confidence interval [CI], 4.4-158.5) and total cataract (OR: 4.8; 95% CI, 1.3-17). CONCLUSION: Nearly half of the eyes had visual acuity >6/18. The outcome was poorer in congenital cataracts, especially those operated after >1 year of age
Lipid-soluble Vitamins A, D, and E in HIV-Infected Pregnant women in Tanzania.
No full textThere is limited published research examining lipid-soluble vitamins in human immunodeficiency virus (HIV)-infected pregnant women, particularly in resource-limited settings. This is an observational analysis of 1078 HIV-infected pregnant women enrolled in a trial of vitamin supplementation in Tanzania. Baseline data on sociodemographic and anthropometric characteristics, clinical signs and symptoms, and laboratory parameters were used to identify correlates of low plasma vitamin A (<0.7 micromol/l), vitamin D (<80 nmol/l) and vitamin E (<9.7 micromol/l) status. Binomial regression was used to estimate risk ratios and 95% confidence intervals. Approximately 35, 39 and 51% of the women had low levels of vitamins A, D and E, respectively. Severe anemia (hemoglobin <85 g/l; P<0.01), plasma vitamin E (P=0.02), selenium (P=0.01) and vitamin D (P=0.02) concentrations were significant correlates of low vitamin A status in multivariate models. Erythrocyte Sedimentation Rate (ESR) was independently related to low vitamin A status in a nonlinear manner (P=0.01). The correlates of low vitamin D status were CD8 cell count (P=0.01), high ESR (ESR >81 mm/h; P<0.01), gestational age at enrollment (nonlinear; P=0.03) and plasma vitamins A (P=0.02) and E (P=0.01). For low vitamin E status, the correlates were money spent on food per household per day (P<0.01), plasma vitamin A concentration (nonlinear; P<0.01) and a gestational age <16 weeks at enrollment (P<0.01). Low concentrations of lipid-soluble vitamins are widely prevalent among HIV-infected women in Tanzania and are correlated with other nutritional insufficiencies. Identifying HIV-infected persons at greater risk of poor nutritional status and infections may help inform design and implementation of appropriate interventions
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