1,967 research outputs found
Ludell, Rawlins County
No full textGreg Solko, “Ludell, Rawlins County,” Chapman Center Research Collections, https://ccrsresearchcollections.omeka.net/items/show/130.This study of Ludell, Kansas and the lack of name continuity in Rawlins County includes a map analysis, a printed memoir-history by a resident, photographs of the town site, and an author’s firsthand accounts of interviews conducted with those who lived in the community
A bifurcated circular waveguide problem
No full textThis is a pre-copy-editing, author-produced PDF of an article accepted for publication in IMA Journal of Applied Mathematics following peer review. The definitive publisher-authenticated version A D Rawlins. A bifurcated circular waveguide problem. J.I.M.A. 54 (1995) 59-81. Oxford University press is available online at: http://imamat.oxfordjournals.org/cgi/reprint/54/1/59.pdfA rigorous and exact solution is obtained for the problem of the radiation of sound from a semi-infinite rigid duct inserted axially into a larger acoustically lined tube of infinite length. The solution to this problem is obtained by the Wiener-Hopf technique. The transmission and reflection coefficients, when the fundamental mode propagates in the semi-infinite tube, are obtained. The present results could be of use for exhaust design, and as a possible instrument for impedance measurement
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K/UR ; 344
No full text"Field and laboratory data are presented for 454 water samples 1.279 sediment samples from the Rawlins Quadrangle, Wyoming. Uranium values have been reported by Los Alamos National Laboratory in Report GJBX-81(78). The samples were collected by Los Alamos National Laboratory; laboratory analysis and data reporting were performed by the Uranium resource evaluation project at Oak Ridge, Tennessee.
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K/UR ; 344
No full textDocumentation outlining characteristics of field data samples taken in the Rawlins quadrangle
Early behavioural changes in scrapie-affected mice and the influence of dapsone
No full textBehavioural testing can reveal effects in scrapie-infected mice long before overt clinical signs appear (Betmouni et al., 1999, Psychobiology, 27, 63–71). These effects may be partly attributable to an early, atypical inflammatory response in the brain (Betmouni et al., 1996, Neuroscience, 74, 1–5). The present study replicated and extended these findings, and examined the effect of chronic treatment with dapsone. This anti-inflammatory compound has been reported to delay disease onset in a rat model of Creutzfeldt–Jakob disease (Manuelidis et al., 1998, Lancet, 352, 456). Although the doses used in the present study were higher than those of Manuelidis et al. (1998), no attenuation of the disease was seen in either behavioural or subsequent histological tests. Burrowing, i.e. displacing food pellets from a tube in the home cage, decreased from around week 12 in scrapie-infected mice, as did consumption of palatable glucose solution. Concurrently, ambulation in an open field increased, as did rearing at around week 17. Spontaneous alternation was impaired around this time. Around 18 weeks, motor performance on an inverted screen, horizontal bar, rotating rod and static rods decreased. Nest construction was impaired at 20 weeks. Overt clinical signs (reduction in mobility, hunched posture, poor coat condition, bladder enlargement) only occurred after week 20, when the mice were prepared for histology. The ME7 scrapie-infected mice thus showed a characteristic complex of neurological and behavioural changes during the course of the disease that were not ameliorated by dapsone. These changes appeared well before clinical signs were prominent
A note on Wiener-Hopf matrix factorisation
No full textThis is a pre-copy-editing, author-produced PDF of an article accepted for publication in Quarterly Journal of Mechanics and Applied Mathematics following peer review. The definitive publisher-authenticated version Rawlins, A D (1985). A note on Wiener-Hopf matrix factorisation. Quarterly Journal of Mechanics and Applied Mathematics. 38 (3) 433-437 is available online at: http://qjmam.oxfordjournals.org/cgi/reprint/38/3/433.pdfIn this paper the most general class of 2 x 2 matrices is determined which permit a
Wiener-Hopf factorization by the procedure of Rawlins and Williams (1). According
to this procedure, the factorization problem is reduced to a matrix Hilbert problem
on a half-line, where the matrix involved in the Hilbert problem is required to have
zero diagonal elements
The method of finite-product extraction and an application to Wiener-Hopf theory
No full textCopyright @ The Author, 2011. The publisher version of the article can be accessed at the link below.In this work we describe a simple method for finding approximate representations for special functions which are entire transcendental functions that can be represented by infinite products. This method replaces the infinite product by a finite polynomial and Gamma functions. This approximate representation is shown in the case of Bessel functions to be very accurate over a large range of parameter values. These approximate expressions can be useful for finding the roots of a transcendental equation and the Wiener-Hopf factorization of functions involving such Bessel functions.The method is shown to be potentially useful for other transcendental andWiener-Hopf problems, which involve other entire functions that have infinite product representations
Letter dated 16 December 1973 from Lorenzo A. Richards to Stephen L. Rawlins
No full textLetter dated 6 December 1973 from Stephen L. Rawlins, soil scientist with the U.S. Department of Agriculture, to K. P. George, responding to a letter addressed to Lorenzo A. Richards (copy sent to Lorenzo A. Richards); Also a letter dated 16 December 1973 from Lorenzo A. Richards to Stephen L. RawlinsWESTERN REGION, SO.CALIFORNIA-HAWAII AREA December 6, 1973 Dr. K. P. George Dept. of Civil Engineering The University of Mississippi University, Mississippi 38677 Dear Dr. George: Dr. Richards has retired, but is still very much interested in the subject of your letter otl November 13. Because he lacks technical literature and references at his home, he has forwarded your letter to me for reply. He also suggests a technique for embedding psychrometers in concrete. You could embed a ceramic enclosed psychrometer with a small nylon tube cemented into the enclosure to permit pressure to be applied to Keep the psychrometer from filling with water before the concrete set. Commercial psychrometers, as well as ancillary equipment, can he obtained from Wescor (45b> South Main St. , Logan, Utah 84321). Enclosed is a reprint describing an experiment that used a vented, ceramic-enclosed psychrometer that may be of" interest to you. Sincerely, Stephen L.Rawlins Supervisory Soil Scientist cc: Dr. L.A.Richards Enclosure USSL Publ. #463 SLR:ask .A 7 oiW A\ A V 7 7 fr I \u27 • At • I ••--s, -f .. ,-., AAjyt-L •• 4 •>-»- - / . 7 A„ :s.-y....i . • ..• A A . s\u27•••!.. p %%A o 7 A • .: >- \u27 • " " \u27 f- •( \u27- • " • - A Ay- i A 4 Ytytyf A-f 7 - 7 .-. .. q! • • \u27• -i \u27--•\u27 o : \u27 • •• yi b*A ( 7,uj_.y ... .-, • "j~ • y> -iA^y 77*71 , p •\u27• s t -- £.is. i.y- i...s &Ay i ; T si iS y •. > A- t t • i I •\u27, A I -\u27A / / . , A \u27 7 \u27 y » vJ IAS \ i s,iQ/. % . • • - •-^AT*- / - •\u27 ••- 7 O _ -\u27._. i p . .- y - • •-. I A -I.. \u27A • • --> -/^ •v 7 - I -\u27 . - O - C <...£..
Neuropathologically distinct prion strains give rise to similar temporal profiles of behavioral deficits
No full textMouse-adapted scrapie strains have been characterized by vacuolation profiles and incubation times, but the behavioral consequences have not been well studied. Here, we compared behavioral impairments produced by ME7, 79A, 22L, and 22A strains in C57BL/6J mice. We show that early impairments on burrowing, glucose consumption, nesting and open field activity, and late stage motor impairments show a very similar temporal sequence in ME7, 79A, and 22L. The long incubation time of the 22A strain produces much later impairments. However, the strains show clear late stage neuropathological differences. All strains showed clear microglial activation and synaptic loss in the hippocampus, but only ME7 and 79A showed significant CA1 neuronal death. Conversely, 22L and 22A showed significant cerebellar Purkinje neuron loss. All strains showed marked thalamic neuronal loss. These behavioral similarities coupled with clear pathological differences could serve to identify key circuits whose early dysfunction underlies the neurological effects of different prion strain
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