4,647 research outputs found
Evaluating the potential of the forthcoming commercial US high-resolution satellite sensor imagery at the Ordnance Survey
No full textAs the National Mapping Agency of Great Britain, the Ordinance Survey® (OS) is driven by a need to reduce costs and commercialize operations, and as such has been investigating photogrammetric methods to improve existing products, streamline existing production, and increase the current portfolio of products. Over the last 18 months, the OS has been involved in a major research project to tackle these issues through an evaluation of the forthcoming commercial U.S. high spatial resolution satellite sensors which are offering 1-m panchromatic and 4-m multispectral spatial resolutions. Work has focused on improving the existing National Height Dataset (NHD), reducing the cost of photogrammetric survey, automatic topographic feature change detection, production of DEMs; three-dimensional (3D) urban models, and land-use classification. Results from the project using simulated imagery indicate that it would have potential within the OS in all areas evaluated. The work now needs to be followed up when real high spatial resolution satellite imagery becomes commercially available
Voice Compression and Communications: Principles and Applications for Fixes and Wireless Channels
No full textUp-to-date, expert coverage of topics in wireless voice communications Voice communication is the most important facet of mobile radio service. Even when the predicted surge of wireless data and Internet services becomes a reality, voice will remain the most natural means of human communication. Voice Compression and Communications details issues in wireless voice communications and treats compression, channel coding, and wireless transmission as a joint subject. Part I covers background material, whereas Part II provides detailed information on both proprietary and standardized analysis-by-synthesis codecs, including the speech codecs of virtually all existing wireline-based and wireless systems. Parts III and IV discuss mainly research-based wideband, audio, as well as very low-rate schemes likely to find their way into future standards. Voice Compression and Communications describes fundamental concepts in a non-mathematical way early in the book for those with only a background knowledge of signal processing and communications. More advanced readers will find detailed discussions of theoretical principles, future concepts, and solutions to various specific wireless voice communications problems
1973-10-25 Morehead State Concert and Lecture Series J.P. Donleavy
No full textRenowned author J.P. Donleavy speaks on the plight of an author and the methods to write, recorded on October 25, 1973
Fables from Aesop
No full textThis is the kind of book that makes printers proud. It is very nicely printed and bound. Unfortunately, it has no pagination, T of C, or AI. The rhyming verse translations of the thirty fables are witty and careful. Each fable has its own page. The fox, who has just given the lion everything in the division of spoils and has been asked by the lion who taught him to be so intelligent, answers My teacher's well known to us both,/But recently, sadly, deceased. My prize for the best text of all goes to The Patient Who Recovered and the Bad Doctor. The patient who has revived despite the bad doctor tells of the King and Queen of the dead being angered by the doctors who keep people among the living. He mentions the present doctor as one of those singled out for criticism. But, he goes on, he set them straight by saying that no one is less of a doctor than this man. In One Swallow and Spring, the text makes the man sympathetic instead of critical of the swallow who misled him about the coming of spring. The typesetter has particular fun with The Crab and His Mother, since he sets two key lines diagonally across the page. I find six full-page illustrations: The Lion, the Fox, and the Ass; The Fox and the Goat; The Patient Who Recovered and the Bad Doctor; The Boar, the Lion, and the Vultures; FG; and BW. FG is the most creative. The fox ends up hanging from the grape vine, and the latter includes a fine sour face. The illustrations are, I believe, less impressive than the translations.This is a hardbound book (hard cover)#305 of 426Signed by James Sabben-Clare and Atkinson-WillesTranslated by James Sabben-Clar
Entrainment and detrainment rates from the piv measurements at the top of laboratory analogs of stratocumulus and cumulus clouds
No full textWe analyze mixing at the top of laboratory analogs of convective clouds: stratocumulus and cumulus to investigate entrainment of environmental air into the cloud. We retrieve two components of air velocity using Particle Image Velocimetry technique. Suitable image processing allows to determine cloud–clear air interface. Using velocity differences between cloudy and clear sides of the interface we calculate entrainment / detrainment rates
Co-operativity between modules within a C3b-binding site of complement receptor type 1
No full textAbstractComplement receptor type 1 (CR1) has 30 modules in its extracellular portion. An understanding of structure-function relationships within CR1 is being assembled gradually from studies of overlapping protein fragments. A CR1 fragment corresponding to modules 16 and 17 was expressed recombinantly as a non-glycosylated protein and its stability and unfolding characteristics studied using biophysical techniques. The results were compared with data collected previously on a CR1 fragment encompassing modules 15, 16 and 17 which together constitute a C3b-binding site (Kirkitadze, M.D., Krych, M., Uhrin, D., Dryden, D.T.F., Smith, B.O., Wang, X., Hauhart, R., Atkinson, J.P. and Barlow, P.N. (1999) Biochemistry 38, 7019–7031). Modules within CR1 were found to co-operate during unfolding. The folding, stability and flexibility of this protein is therefore likely to be a complex function, and not just the sum, of contributions from individual modules
Vortex Dynamics in The Transitional and Turbulent Wake of 6:1 Prolate Spheroid at 45-deg incidence angle
No full textThe incompressible flow past a 6:1 prolate spheroid with an inclination angle of 45o at Re = 3,000 has been studied by means of direct numerical simulations (DNS). The Reynolds number is based on the inflow velocity and minor-axis length. The preliminary results presented here are focused mainly on vortex dynamics and vortical structures in the wake. The wake behind this configuration starts almost symmetric but is soon strongly deflected and bent as it evolves to the intermediate wake. A pair of unequal-strength vortices dominates the intermediate wake, of which one exhibits the shape of a long vortex tube while the other rapidly breaks down into turbulent-like vortical structures
Experimental characterisation of large scale structures in a high Reynolds number turbulent boundary layer
No full textA very large field of view (4δ x 1δ) with a good spatial resolution owing to the use of four 2k x 2k pixel cameras was conducted in a flat plate boundary layer at two Reynolds numbers (Reθ ≈7,500 and 20,000). Comparing the flow statistics with previously obtained hot-wire data under similar flow conditions show good agreement. The goal of this experiment is to detect and characterise the large scale motions which develop in the log region of a high Reynolds number turbulent boundary layer
Letter from J.P. Bradley to Mr. [William] S. Martin The Dominguez Estate Company, June 28, 1940
No full textRegarding attached payment by Mr. K.L. Schaap settling his account
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