197,217 research outputs found
Dy3+ emission in M5(PO4)3F (M = Ca, Ba) phosphor
No full textUltrafine M5(PO4)3F:Dy3+ (M = Ca, Ba) phosphors were prepared via
combustion process using metal nitrates as precursors. The formation of crystalline
phosphate was confirmed by X-ray diffraction pattern. The PL excitation spectra show
the excitation peaks observed at 250 to 400 nm due to f.f transition of Dy3+ ion,
which are useful for solid-state lighting purpose (mercury free excitation). The PL
emission of Dy3+ ion by 348 nm excitation gave an emission at 489 nm (blue), 582 nm
(yellow) and 675 nm (red). All the characteristics of BYR emissions like BGR
indicate that Dy doped Ca5(PO4)3F and Ba5(PO4)3F phosphors are good candidates that
can be applied in solid-state lighting phosphor (mercury free excited lamp phosphor)
and white light LED.Author Affiliation: K N Shinde1, I M Nagpure1, S J Dhoble, S V Godbole and M K Bhide
1.Kamla Nehru Mahavidyalaya, Sakkardara Square, Nagpur-440 009, Maharashtra, India
2.Spectroscopy Section, Radio Chemistry Division, Bhabha Atomic Research Centre,
Mumbai-400 085, India
E-mail : [email protected] Nehru Mahavidyalaya, Sakkardara Square, Nagpur-440 009, Maharashtra, India
2Spectroscopy Section, Radio Chemistry Division, Bhabha Atomic Research Centre,
Mumbai-400 085, Indi
Detection of West Nile virus and tick-borne encephalitis virus in birds in Slovakia, using a universal primer set
No full textWest Nile virus (WNV) is a mosquito-borne neurotropic pathogen that presents a major public health concern. Information on WNV prevalence and circulation in Slovakia is insufficient. Oral and cloacal swabs and bird brain samples were tested for flavivirus RNA by RT-PCR using newly designed generic primers. The species designation was confirmed by sequencing. WNV was detected in swab and brain samples, whereas one brain sample was positive for tick-borne encephalitis virus (TBEV). The WNV sequences clustered with lineages 1 and 2. These results confirm the circulation of WNV in birds in Slovakia and emphasize the risk of infection of humans and horses
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
sj-docx-1-jad-10.1177_10870547231217089 – Supplemental material for Family Functioning in Children With ADHD and Subthreshold ADHD: A 3-Year Longitudinal Study
No full textSupplemental material, sj-docx-1-jad-10.1177_10870547231217089 for Family Functioning in Children With ADHD and Subthreshold ADHD: A 3-Year Longitudinal Study by Sampada Bhide, Daryl Efron, Obioha C. Ukoumunne, Vicki Anderson, Jan M. Nicholson, Tim Silk, Philip Hazell, Alisha Gulenc and Emma Sciberras in Journal of Attention Disorders</p
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
Mid pregnancy fetal growth, uteroplacental doppler indices and maternal demographic characteristics: role in prediction of stillbirth.
No full textINTRODUCTION: To evaluate the relative value of mid trimester fetal growth, uterine artery (UtA) Doppler indices and maternal demographics in prediction of stillbirth. MATERIAL AND METHODS: Retrospective cohort study; 23,894 singleton pregnancies routinely scanned between 19 and 24 weeks' gestation. Maternal characteristics included age, body mass index, ethnicity and medical history. Fetal biometry indices, birthweight and UtA pulsatility index (PI) values were converted to percentiles and multivariable logistic regression analysis was performed. The predictive accuracy was assessed using ROC curves analysis. The main outcome was prediction of preterm and term stillbirths. RESULTS: Non-Caucasian ethnicity, femur length centile and UtA PI were significantly associated with the risk of stillbirth (all p <0.01). The detection rate of screening by maternal factors alone was 19% for all stillbirths, and 12% and 14% for term and preterm stillbirth at a 10% false positive rate; using femur length centile alone the detection rates were 27% and 23% respectively. UtA PI alone was able to predict 24% and 31% of term and preterm stillbirths. Screening by combining maternal factors, femur length centile and UtA Doppler detected 27% and 35% of term and preterm stillbirths at a 10% false positive rate. CONCLUSIONS: Second trimester ultrasound assessment offers an opportunity to identify pregnancies at the highest risk of stillbirth occurring as a consequence of placental dysfunction. This information may be useful to improve pregnancy outcome by identifying women who may benefit from increased ultrasound surveillance and/or timely intervention. This article is protected by copyright. All rights reserved
Mid-pregnancy fetal biometry, uterine artery Doppler indices and maternal demographic characteristics: Role in prediction of small-for-gestational-age birth
No full textIntroduction The aim of this study was to evaluate the role of mid-trimester fetal biometry, uterine artery Doppler indices and maternal demographics in prediction of small-for-gestational-age (SGA) birth. Materials and methods We conducted a retrospective cohort study in a single referral center. The study included 23 894 singleton pregnancies scanned between 19 and 24 weeks of gestation. Maternal demographics included age, body mass index and ethnicity. Fetal biometry, birthweight and uterine artery pulsatility index values were converted into centiles. Multivariable logistic regression analysis was performed and the predictive accuracy was assessed using receiver operating characteristic curve analysis. The main outcome measure was prediction of delivery of preterm and term SGA neonates defined as a birthweight in the lowest centile groups (<10th, <5th and <3rd centiles). Results Maternal ethnicity, fetal biometry and uterine artery Doppler indices were significantly associated with the risk of SGA <5th centile (p < 0.01). Maternal factors or fetal biometry alone showed poor to moderate performance in prediction of term and preterm SGA <5th centile at a 10% false-positive rate. Uterine artery pulsatility index alone was able to predict 25, 60 and 77% of SGA <5th centile delivering at >37, <37 and <32 weeks of gestation respectively at a 10% false-positive rate; maternal factors, fetal biometry and uterine artery Doppler combined detected 40, 66 and 89% of term, preterm and very preterm SGA <5th centile at a 10% false-positive rate. Conclusions Second-trimester screening can identify the majority of pregnancies at high risk of SGA birth and showed a higher performance for earlier gestational ages at birth and lower birthweight centiles
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