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Trees can reduce noise by sound reflection and absorption and this is the first book bringing together the widely scattered literature on noise abatement by urban trees. The book will interest those concerned with environmental management noise control and urban forestry. It is an invaluable source of information for environmental managers foresters acousticians engineers architects scientists and students.

Music Teacher Identities - Buch Based on findings of an in-depth social phenomenological study, this book describes the experiences of music teachers, whose careers are rich, complex, and multi-faceted. Stories of their professional enactments...

Considerable activity in the acoustics of wood has occurred since the first edition of this book in 1995. An informal survey of a number of the published articles and papers presented at international conferences revealed that the interest of the wood science community is continually increasing. In this context I felt c- pelled to revise the text in accordance with newer findings and this prompted the addition in the present book of 159 new references added to the existing 850 in the first edition. As a result of the favorable comments upon the first edition from students and colleagues I have included a part on mathematical theory related to wave pro- gation in orthotropic solids in the general text in order to enable the interested reader to follow the essentially physical aspects of the subject. A new chapter related to acousto-ultrasonics is introduced; Chapters 4 5 6 8 9 10 11 and 12 have been considerably expanded and a significant redistribution of the subject matter from the earlier edition has been made.

Based on findings of an in-depth social phenomenological study, this book describes the experiences of music teachers, whose careers are rich, complex, and multi-faceted. Stories of their professional enactments contribute rich considerations in music teacher identity discourse and to the construction of their professional selves. Analysis revealed an overall sense of professional self and various degrees of three role-taking selves: performing, teaching, and musical. Findings suggest that an active, purposeful construction of consociate relationships can support a balanced, reconciled conception of self, which promotes flexibility within and among structures of the lifeworld and profession. Individuals' social worlds are highlighted in terms of ways they shape social and professional worlds. With a wide view of who music teachers are and what they do, this book reveals insights to the supports needed to enact a long, satisfying career.

Working in the fractional Laplace framework this book provides models and theorems related to nonlocal diffusion phenomena. In addition to a simple probabilistic interpretation some applications to water waves crystal dislocations nonlocal phase transitions nonlocal minimal surfaces and Schrödinger equations are given. Furthermore an example of an s-harmonic function its harmonic extension and some insight into a fractional version of a classical conjecture due to De Giorgi are presented. Although the aim is primarily to gather some introductory material concerning applications of the fractional Laplacian some of the proofs and results are new. The work is entirely self-contained and readers who wish to pursue related subjects of interest are invited to consult the rich bibliography for guidance.

Working in the fractional Laplace framework, this book provides models and theorems related to nonlocal diffusion phenomena. In addition to a simple probabilistic interpretation, some applications to water waves, crystal dislocations, nonlocal phase transitions, nonlocal minimal surfaces and Schrödinger equations are given. Furthermore, an example of an s-harmonic function, its harmonic extension and some insight into a fractional version of a classical conjecture due to De Giorgi are presented. Although the aim is primarily to gather some introductory material concerning applications of the fractional Laplacian, some of the proofs and results are new. The work is entirely self-contained, and readers who wish to pursue related subjects of interest are invited to consult the rich bibliography for guidance.

This expert volume addresses the practical challenges which have so far inhibited the commercial realization of a rechargeable magnesium battery placing the discussion within the context of the already established lithium-ion battery. Lithium-ion batteries are becoming commonplace in most power applications starting with portable electronics and expanding to motor vehicles stationary storage and backup power. Since their introduction 25 years ago they have slowly been replacing all other battery chemistries. As the technology has matured it is nearing its theoretical limits in terms of energy density so research and development worldwide is quickly shifting towards the study of new battery chemistries with cheaper components and higher energy densities. A very popular battery candidate which has generated a lot of recent interest is the magnesium rechargeable battery. Magnesium is five orders of magnitude more abundant than lithium can move two electrons per cation and is known to plate smoothly without any evidence of dendritic growth. However many challenges remain to be overcome. This essential volume presents an unfiltered view on both the realistic promises and significant obstacles for this technology providing key insights and proposed solutions.

Sambucus Comp Globuli 20 g von WALA Heilmittel GmbH günstig bei Ihrer Beraterapotheke bestellen

This book on the Nondestructive Characterization and Imaging of Wood by Professor Voichita Bucur is truly the most outstanding reference on the subject ever written. Since the origins of mankind wood has played a key role in the history of humans and other living creatures ranging from provision of life from trees giving air heat light and food to nourish their bodies to structures to protect them from the elements. Wood has also played a key role in one of the world's primary religions. Nondestructive diagnostics methods have long found application in medi cal practice for examination of the human body in order to detect life threatening abnormalities and permit diagnosis to extend life. Nondestructive testing has been used for many years to insure the safety of machinery air craft railroads tunnels buildings and many other structures. Therefore it is timely for a treatise like the present one to be written describing how wood can be characterized without employing destructive test methods. Since wood is so valuable to mankind it is important to know the latest methods to nondestructively characterize wood for all practical applications.

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This book addresses key questions about the materials used for the wind instruments of classical symphony orchestra such as flutes clarinets saxophones oboes bassoons and pipe organs. The content of this book is structured into four parts. Part 1- Description of materials for wind instruments deals with wood species and materials for reeds used for making clarinet oboe and bassoon- and with metallic materials and alloys for - horn trumpet trombone etc. Auxiliary materials associated with the manufacturing of wind instruments are felt cork leather and parchment. Part 2- Basic acoustics of wind instruments in which are presented succinctly some pertinent aspects related to the physics of the resonant air column. An important aspect discussed is related to the effect of wall material on the vibration modes of the walls of wind instruments. The methods for measuring the acoustical properties of wind instruments are presented. Part 3- Manufacturing of wind instruments describes the technology used in manufacturing metallic tubes and pipes made of wood. Part 4 - The durability and degradation of materials addresses data about methods for cleaning wind instruments studies factors producing degradation of organ pipes describes methods of conservation and restoration of brass instruments and of historical pipe organs. Finally the properties of marble are described being the only one nondegradable and sustainable material used for pipes for organs.

Sambucus Nigra D 10 Globuli 10 g von DHU-Arzneimittel GmbH & Co. KG günstig bei Ihrer Beraterapotheke bestellen

This book addresses core questions about the role of materials in general and of wood in particular in the construction of string instruments used in the modern symphony orchestra - violins violas cellos and basses. Further attention is given to materials for classical guitars harps harpsichords and pianos. While some of the approaches discussed are traditional most of them depend upon new scientific approaches to the study of the structure of materials such as for example wood cell structure which is visible only using modern high resolution microscopic techniques. Many examples of modern and classical instruments are examined together with the relevance of classical techniques for the treatment of wood. Composite materials especially designed for soundboards could be a good substitute for some traditional wood species. The body and soundboard of the instrument are of major importance for their acoustical properties but the study also examines traditional and new wood species used for items such as bows the instrument neck string pegs etc. Wood species' properties for musical instruments and growth origins of woods used by great makers such as Antonio Stradivari are examined and compared with more recently grown woods available to current makers. The role of varnish in the appearance and acoustics of the final instrument is also discussed since it has often been proposed as a 'secret ingredient' used by great makers. Aspects related to strings are commented.As well as discussing these subjects with many illustrations from classical and contemporary instruments the book gives attention to conservation and restoration of old instruments and the physical results of these techniques. There is also discussion of the current value of old instruments both for modern performances and as works of art having great monetary value.The book will be of interest and value to researchers advanced students music historians and contemporary string instrument makers. Musicians in general particularly those playing string instruments will also find its revelations fascinating. It will also attract the attention of those using wood for a variety of other purposes for its use in musical instruments uncovers many of its fundamental features. Professor Neville H. FletcherAustralian National University Canberra

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This book presents the evolution of uniform approximations of continuous functions. Starting from the simple case of a real continuous function defined on a closed real interval i.e. the Weierstrass approximation theorems it proceeds up to the abstract case of approximation theorems in a locally convex lattice of (M) type. The most important generalizations of Weierstrass' theorems obtained by Korovkin Bohman Stone Bishop and Von Neumann are also included.In turn the book presents the approximation of continuous functions defined on a locally compact space (the functions from a weighted space) and that of continuous differentiable functions defined on ¡n. In closing it highlights selected approximation theorems in locally convex lattices of (M) type. The book is intended for advanced and graduate students of mathematics and can also serve as a resource for researchers in the field of the theory of functions.

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The study on the impact of the digital consumer's emotional intelligence based on the moral values promoted in e-business presents an actual interdisciplinary topic in the context of the digital age. The research proposes an original approach to e-business and digital consumer in terms of moral values and emotional intelligence. The Internet has positive effects on consumers and organizations when it is used properly to improve the quality of life. New consumers are more selective receptive and interested in new technologies. Digital consumers have the opportunity to get informed quickly about products/services offers and e-business provides a simplified acquisition process through diversity and accessibility.

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Devices that convert explosive energy into electromagnetic energy are often called Flux Compression Generators (FCGs) in the United States whereas the term Magnetocumulative Generators (MCGs) is more com monly used in Russia. Since the Russian literature is accessed more heavily in this book the latter term is used here. In any event the basic process involves using explosives to force an initial magnetic flux into a region of smaller inductance in such a manner that loss of flux is minimized. In the event that no flux is lost the magnetic energy associated with the flux inversely proportional to the inductance must increase. Flux loss is min imized by confining it with good conductors which in turn are driven rapidly by the explosive to reduce the system inductance. The magnetic energy is increased by the work the conductors do as they are forcibly moved against the magnetic field the energy in turn being supplied by the explosive driving them. As the reader may infer there are different kinds of generators some of which might be difficult to recognize as MCGs. Nonetheless they all possess the features outlined above. Explosives have some unique features as energy sources. They have very high available energy densities; they release energy rapidly or at high power; they can develop very high pressures.

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