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Author : Jeff Rud
Publisher : Orca Book Publishers
Page : 176 pages
File Size : 53,9 Mb
Release : 2008-03-01
Category : Juvenile Fiction
ISBN : 9781551439815
Kyle is a rising star on the school's basketball team, but when he connects with an old friend and auditions for the school play, he finds opposition both on and off the court.
Author : Kwame Alexander
Publisher : Houghton Mifflin Harcourt
Page : 245 pages
File Size : 40,5 Mb
Release : 2014
Category : JUVENILE FICTION
ISBN : 9780544107717
A middle-grade novel in verse follows the experiences of twin basketball stars Josh and Jordan, who struggle with challenges on and off the court while their father ignores his declining health. 20,000 first printing.
Author : Douglas Self
Publisher : Taylor & Francis
Page : 606 pages
File Size : 50,8 Mb
Release : 2012-08-06
Category : Technology & Engineering
ISBN : 9781136111891
The Design of Active Crossovers is a unique guide to the design of high-quality circuitry for splitting audio frequencies into separate bands and directing them to different loudspeaker drive units specifically designed for handling their own range of frequencies. Traditionally this has been done by using passive crossover units built into the loudspeaker boxes; this is the simplest solution, but it is also a bundle of compromises. The high cost of passive crossover components, and the power losses in them, means that passive crossovers have to use relatively few parts. This limits how well the crossover can do its basic job. Active crossovers, sometimes called electronic crossovers, tackle the problem in a much more sophisticated manner. The division of the audio into bands is performed at low signal levels, before the power amplifiers, where it can be done with much greater precision. Very sophisticated filtering and response-shaping networks can be built at comparatively low cost. Time-delay networks that compensate for phyical misalignments in speaker construction can be implemented easily; the equivalent in a passive crossover is impractical because of the large cost and the heavy signal losses. Active crossover technology is also directly applicable to other band-splitting signal-processing devices such as multi-band compressors. The use of active crossovers is increasing. They are used by almost every sound reinforcement system, by almost every recording studio monitoring set-up, and to a small but growing extent in domestic hifi. There is a growing acceptance in the hifi industry that multi-amplification using active crossovers is the obvious next step (and possibly the last big one) to getting the best possible sound. There is also a large usage of active crossovers in car audio, with the emphasis on routing the bass to enormous low-frequency loudspeakers. One of the very few drawbacks to using the active crossover approach is that it requires more power amplifiers; these have often been built into the loudspeaker, along with the crossover, and this deprives the customer of the chance to choose their own amplifier, leading to resistance to the whole active crossover philosophy. A comprehensive proposal for solving this problem is an important part of this book. The design of active crossovers is closely linked with that of the loudspeakers they drive. A chapter gives a concise but complete account of all the loudspeaker design issues that affect the associated active crossover. This book is packed full of valuable information, with virtually every page revealing nuggets of specialized knowledge never before published. Essential points of theory bearing on practical performance are lucidly and thoroughly explained, with the mathematics kept to an essential minimum. Douglas' background in design for manufacture ensures he keeps a wary eye on the cost of things. Features: Crossover basics and requirements The many different crossover types and how they work Design almost any kind of active filter with minimal mathematics Make crossover filters with very low noise and distortion Make high-performance time-delay filters that give a constant delay over a wide range of frequency Make a wide variety of audio equaliser stages: shelving, peaking and notch characteristics All about active crossover system design for optimal noise and dynamic range There is a large amount of new material that has never been published before. A few examples: using capacitance multipliers in biquad equalisers, opamp output biasing to reduce distortion, the design of NTMTM notch crossovers, the design of special filters for filler-driver crossovers, the use of mixed capacitors to reduce filter distortion, differentially elevated internal levels to reduce noise, and so on. Douglas wears his learning lightly, and this book features the engaging prose style familiar from his other books The Audio Power Amplifier Design Handbook, Self on Audio, and the recent Small Signal Audio Design.
Author : United States. Patent Office
Publisher : Unknown
Page : 1002 pages
File Size : 53,9 Mb
Release : 1903
Category : Patents
ISBN : WISC:89048454995
Author : Anonim
Publisher : Unknown
Page : 546 pages
File Size : 51,7 Mb
Release : 1984
Category : Medical care
ISBN : MINN:31951000184875B
Author : Cedric D. Burrows
Publisher : University of Pittsburgh Press
Page : 219 pages
File Size : 40,5 Mb
Release : 2020-10-27
Category : Language Arts & Disciplines
ISBN : 9780822987611
Winner, 2021 NCTE David H. Russell Award In music, crossover means that a song has moved beyond its original genre and audience into the general social consciousness. Rhetorical Crossover uses the same concept to theorize how the black rhetorical presence has moved in mainstream spaces in an era where African Americans were becoming more visible in white culture. Cedric Burrows argues that when black rhetoric moves into the dominant culture, white audiences appear welcoming to African Americans as long as they present an acceptable form of blackness for white tastes. The predominant culture has always constructed coded narratives on how the black rhetorical presence should appear and behave when in majority spaces. In response, African Americans developed their own narratives that revise and reinvent mainstream narratives while also reaffirming their humanity. Using an interdisciplinary model built from music, education, film, and social movement studies, Rhetorical Crossover details the dueling narratives about African Americans that percolate throughout the United States.
Author : Tamas D. Gedeon,Lance C.C. Fung
Publisher : Springer
Page : 1078 pages
File Size : 41,9 Mb
Release : 2003-12-01
Category : Computers
ISBN : 9783540245810
Consider the problem of a robot (algorithm, learning mechanism) moving along the real line attempting to locate a particular point ? . To assist the me- anism, we assume that it can communicate with an Environment (“Oracle”) which guides it with information regarding the direction in which it should go. If the Environment is deterministic the problem is the “Deterministic Point - cation Problem” which has been studied rather thoroughly [1]. In its pioneering version [1] the problem was presented in the setting that the Environment could charge the robot a cost which was proportional to the distance it was from the point sought for. The question of having multiple communicating robots locate a point on the line has also been studied [1, 2]. In the stochastic version of this problem, we consider the scenario when the learning mechanism attempts to locate a point in an interval with stochastic (i. e. , possibly erroneous) instead of deterministic responses from the environment. Thus when it should really be moving to the “right” it may be advised to move to the “left” and vice versa. Apart from the problem being of importance in its own right, the stoch- tic pointlocationproblemalsohas potentialapplications insolvingoptimization problems. Inmanyoptimizationsolutions–forexampleinimageprocessing,p- tern recognition and neural computing [5, 9, 11, 12, 14, 16, 19], the algorithm worksits wayfromits currentsolutionto the optimalsolutionbasedoninfor- tion that it currentlyhas. A crucialquestionis oneof determining the parameter whichtheoptimizationalgorithmshoulduse.
Author : Isaac Marion
Publisher : Simon and Schuster
Page : 259 pages
File Size : 49,7 Mb
Release : 2012-12-25
Category : Fiction
ISBN : 9781476717463
Alienated from his fellow zombies because of his dislike of having to kill humans and his enjoyment of Sinatra music, "R" meets a living girl who sharply contrasts with his cold and dreary world and whom he resolves to protect in spite of her delicious appearance.
Author : Scott Orland Rogers
Publisher : CRC Press
Page : 392 pages
File Size : 44,5 Mb
Release : 2011-07-27
Category : Science
ISBN : 9781466503106
Molecular evolution, phylogenetics, genomics, and other related topics are all critical to understanding evolutionary processes. All too frequently, however, they are treated separately in textbooks and courses, such that students fail to connect all of the concepts, principles, and nuances of the evolutionary processes. Integrated Molecular Evolut
Author : Mathieu Capcarrere,Alex A. Freitas,Peter J. Bentley,Colin G. Johnson,Jon Timmis
Publisher : Springer
Page : 949 pages
File Size : 50,7 Mb
Release : 2005-09-19
Category : Computers
ISBN : 9783540318163
TheArti?cialLifetermappearedmorethan20yearsagoinasmallcornerofNew Mexico, USA. Since then the area has developed dramatically, many researchers joining enthusiastically and research groups sprouting everywhere. This frenetic activity led to the emergence of several strands that are now established ?elds in themselves. We are now reaching a stage that one may describe as maturer: with more rigour, more benchmarks, more results, more stringent acceptance criteria, more applications, in brief, more sound science. This, which is the n- ural path of all new areas, comes at a price, however. A certain enthusiasm, a certain adventurousness from the early years is fading and may have been lost on the way. The ?eld has become more reasonable. To counterbalance this and to encourage lively discussions, a conceptual track, where papers were judged on criteria like importance and/or novelty of the concepts proposed rather than the experimental/theoretical results, has been introduced this year. A conference on a theme as broad as Arti?cial Life is bound to be very - verse,but a few tendencies emerged. First, ?elds like ‘Robotics and Autonomous Agents’ or ‘Evolutionary Computation’ are still extremely active and keep on bringing a wealth of results to the A-Life community. Even there, however, new tendencies appear, like collective robotics, and more speci?cally self-assembling robotics, which represent now a large subsection. Second, new areas appear.
Author : Anonim
Publisher : Unknown
Page : 446 pages
File Size : 46,8 Mb
Release : 1934
Category : Eugenics
ISBN : CORNELL:31924065281937
Author : Anonim
Publisher : Unknown
Page : 926 pages
File Size : 47,6 Mb
Release : 1892
Category : Electronic
ISBN : UCAL:B3069484
Author : Igor Kovalchuk,Olga Kovalchuk
Publisher : Academic Press
Page : 762 pages
File Size : 40,7 Mb
Release : 2021-07-17
Category : Science
ISBN : 9780323856805
Genome Stability: From Virus to Human Application, Second Edition, a volume in the Translational Epigenetics series, explores how various species maintain genome stability and genome diversification in response to environmental factors. Here, across thirty-eight chapters, leading researchers provide a deep analysis of genome stability in DNA/RNA viruses, prokaryotes, single cell eukaryotes, lower multicellular eukaryotes, and mammals, examining how epigenetic factors contribute to genome stability and how these species pass memories of encounters to progeny. Topics also include major DNA repair mechanisms, the role of chromatin in genome stability, human diseases associated with genome instability, and genome stability in response to aging. This second edition has been fully revised to address evolving research trends, including CRISPRs/Cas9 genome editing; conventional versus transgenic genome instability; breeding and genetic diseases associated with abnormal DNA repair; RNA and extrachromosomal DNA; cloning, stem cells, and embryo development; programmed genome instability; and conserved and divergent features of repair. This volume is an essential resource for geneticists, epigeneticists, and molecular biologists who are looking to gain a deeper understanding of this rapidly expanding field, and can also be of great use to advanced students who are looking to gain additional expertise in genome stability. A deep analysis of genome stability research from various kingdoms, including epigenetics and transgenerational effects Provides comprehensive coverage of mechanisms utilized by different organisms to maintain genomic stability Contains applications of genome instability research and outcomes for human disease Features all-new chapters on evolving areas of genome stability research, including CRISPRs/Cas9 genome editing, RNA and extrachromosomal DNA, programmed genome instability, and conserved and divergent features of repair
Author : Dan Sullivan,Babs Smith,Michel Neray
Publisher : Unknown
Page : 154 pages
File Size : 44,6 Mb
Release : 1997-11
Category : Electronic
ISBN : 1896635113
Author : California. Department of Transportation
Publisher : Unknown
Page : 1076 pages
File Size : 44,8 Mb
Release : 2010
Category : Bridges
ISBN : UCSD:31822036833754