Search results for ""springer verlag""
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Making Waves: The Story of Ruby Payne-Scott: Australian Pioneer Radio Astronomer
This book is an abbreviated, partly re-written version of "Under the Radar - The First Woman in Radio Astronomy: Ruby Payne-Scott." It addresses a general readership interested in historical and sociological aspects of astronomy and presents the biography of Ruby Payne-Scott (1912 – 1981). As the first female radio astronomer (and one of the first people in the world to consider radio astronomy), she made classic contributions to solar radio physics. She also played a major role in the design of the Australian government's Council for Scientific and Industrial Research radars, which were in turn of vital importance in the Southwest Pacific Theatre in World War II. These radars were used by military personnel from Australia, the United States and New Zealand. From a sociological perspective, her career offers many examples of the perils of being a female academic in the first half of the 20th century. Written in an engaging style and complemented by many historical photographs, this book offers fascinating insights into the beginnings of radio astronomy and the role of a pioneering woman in astronomy. To set the scene, the first colourfully illustrated chapter presents an overview of solar astrophysics and the tools of the radio astronomer.From the reviews of “Under the Radar”:“This is a beautifully-researched, copiously-illustrated and well-written book that tells us much more than the life of one amazing female radio astronomer. It also provides a profile on radar developments during WWII and on Australia’s pre-eminent place in solar radio astronomy in the years following WWII. Under the Radar is compelling reading, and if you have taken the time to read right through this review then it certainly belongs on your bookshelf!” (Wayne Orchiston, Journal of Astronomical History and Heritage, March, 2010)
£31.49
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Poisson Structures
Poisson structures appear in a large variety of contexts, ranging from string theory, classical/quantum mechanics and differential geometry to abstract algebra, algebraic geometry and representation theory. In each one of these contexts, it turns out that the Poisson structure is not a theoretical artifact, but a key element which, unsolicited, comes along with the problem that is investigated, and its delicate properties are decisive for the solution to the problem in nearly all cases. Poisson Structures is the first book that offers a comprehensive introduction to the theory, as well as an overview of the different aspects of Poisson structures. The first part covers solid foundations, the central part consists of a detailed exposition of the different known types of Poisson structures and of the (usually mathematical) contexts in which they appear, and the final part is devoted to the two main applications of Poisson structures (integrable systems and deformation quantization). The clear structure of the book makes it adequate for readers who come across Poisson structures in their research or for graduate students or advanced researchers who are interested in an introduction to the many facets and applications of Poisson structures.
£98.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Global Power Europe - Vol. 1: Theoretical and Institutional Approaches to the EU's External Relations
This two-volume project provides a multi-sectoral perspective over the EU's external projections from traditional as well as critical theoretical and institutional perspectives, and is supported by numerous case studies covering the whole extent of the EU’s external relations. The aim is to strive to present new approaches as well as detailed background studies in analyzing the EU as a global actor.Volume 1: The first volume “Theoretical and Institutional Approaches to the EU’s External Relations” addresses the EU's overall external post-Lisbon Treaty presence both globally and regionally (e.g. in its "neighborhood"), with a special emphasis on the EU’s institutional framework. It also offers fresh and innovative theoretical approaches to understanding the EU’s international position. - With a preface by Alvaro de Vasoncelos (former Director European Union Institute for Security Studies)Volume 2: The second volume “Policies, Actions and Influence of the EU’s External Relations”, examines in both quantitative and qualitative contributions the EU's international efficacy from a political, economic and social perspective based on a plethora of its engagements.
£80.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Design Thinking: Understand – Improve – Apply
“Everybody loves an innovation, an idea that sells.“ But how do we arrive at such ideas that sell? And is it possible to learn how to become an innovator? Over the years Design Thinking – a program originally developed in the engineering department of Stanford University and offered by the two D-schools at the Hasso Plattner Institutes in Stanford and in Potsdam – has proved to be really successful in educating innovators. It blends an end-user focus with multidisciplinary collaboration and iterative improvement to produce innovative products, systems, and services. Design Thinking creates a vibrant interactive environment that promotes learning through rapid conceptual prototyping. In 2008, the HPI-Stanford Design Thinking Research Program was initiated, a venture that encourages multidisciplinary teams to investigate various phenomena of innovation in its technical, business, and human aspects. The researchers are guided by two general questions: 1. What are people really thinking and doing when they are engaged in creative design innovation? How can new frameworks, tools, systems, and methods augment, capture, and reuse successful practices? 2. What is the impact on technology, business, and human performance when design thinking is practiced? How do the tools, systems, and methods really work to get the innovation you want when you want it? How do they fail? In this book, the researchers take a system’s view that begins with a demand for deep, evidence-based understanding of design thinking phenomena. They continue with an exploration of tools which can help improve the adaptive expertise needed for design thinking. The final part of the book concerns design thinking in information technology and its relevance for business process modeling and agile software development, i.e. real world creation and deployment of products, services, and enterprise systems.
£149.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Urinary Tract
The basic anatomy and physiology of the urinary tract, the validity of animal models and other methodological considerations as well as a range of potential therapeutic targets are comprehensively reviewed by leading international experts, making this a unique reference source for basic scientists and research-minded clinicians alike
£224.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Learning from Data Streams: Processing Techniques in Sensor Networks
Processing data streams has raised new research challenges over the last few years. This book provides the reader with a comprehensive overview of stream data processing, including famous prototype implementations like the Nile system and the TinyOS operating system. Applications in security, the natural sciences, and education are presented. The huge bibliography offers an excellent starting point for further reading and future research.
£80.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Statistical Physics: An Advanced Approach with Applications Web-enhanced with Problems and Solutions
The book is divided into two parts. The first part looks at the modeling of statistical systems before moving on to an analysis of these systems. This second edition contains new material on: estimators based on a probability distribution for the parameters; identification of stochastic models from observations; and statistical tests and classification methods.
£62.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Cognitive Economics: An Interdisciplinary Approach
The social sciences study knowing subjects and their interactions. A "cog nitive turn", based on cognitive science, has the potential to enrich these sciences considerably. Cognitive economics belongs within this movement of the social sciences. It aims to take into account the cognitive processes of individuals in economic theory, both on the level of the agent and on the level of their dynamic interactions and the resulting collective phenomena. This is an ambitious research programme that aims to link two levels of com plexity: the level of cognitive phenomena as studied and tested by cognitive science, and the level of collective phenomena produced by the economic in teractions between agents. Such an objective requires cooperation, not only between economists and cognitive scientists but also with mathematicians, physicists and computer scientists, in order to renew, study and simulate models of dynamical systems involving economic agents and their cognitive mechanisms. The hard core of classical economics is the General Equilibrium Theory, based on the optimising rationality of the agent and on static concepts of equilibrium, following a point of view systemised in the framework of Game Theory. The agent is considered "rational" if everything takes place as if he was maximising a function representing his preferences, his utility function.
£161.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Integral Closure: Rees Algebras, Multiplicities, Algorithms
This book gives an account of theoretical and algorithmic developments on the integral closure of algebraic structures. It gives a comprehensive treatment of Rees algebras and multiplicity theory while pointing to applications in many other problem areas. Its main goal is to provide complexity estimates by tracking numerically invariants of the structures that may occur.
£80.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Minimally Invasive Spine Surgery: A Surgical Manual
Don’t miss it! The second, completely revised and expanded edition of the successful surgical manual on minimally invasive spine surgery includes 51 chapters (including more than 20 new chapters) covering all current minimally invasive techniques in spine surgery. A complete survey of all microsurgical and endoscopic techniques with a special focus on semi-invasive injection techniques for diagnostic and therapeutic purposes in low back pain is given. The clear chapter structure with terminology, history, surgical principles, advantages/disadvantages, indications, access principles, complications, and results facilitates navigation through the manual. Topics include the principles of microsurgical and endoscopic treatment, spinal navigation and computer-assisted surgery, minimally invasive reconstruction, fusion, dynamic stabilization in fractures, degenerative disc disease, spinal stenosis, low back pain and deformities. The didactic presentation of surgical steps makes the reader familiar with all types of new minimally invasive techniques in clinical use or still in ongoing clinical trials such as minimally invasive spine arthroplasty.
£161.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Manufacturing Simulation with Plant Simulation and Simtalk: Usage and Programming with Examples and Solutions
Based on the competition of international production networks, the pressure to - crease the efficiency of production systems has increased significantly. In ad- tion, the number of technical components in many products and as a consequence also the requirements for corresponding assembly processes and logistics pr- esses increases. International logistics networks require corresponding logistics concepts. These requirements can be managed only by using appropriate Digital Factory tools in the context of a product lifecycle management environment, which allows reusing data, supports an effective cooperation between different departments, and provides up-to-date and relevant data to every user who needs it. Simulating the complete material flow including all relevant production, st- age, and transport activities is recognized as a key component of the Digital F- tory in the industry and as of today widely used and accepted. Cutting inventory and throughput time by 20–60% and enhancing the productivity of existing p- duction facilities by 15–20% can be achieved in real-life projects.
£107.82
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Modelling Distributed Systems
This textbook guides students through algebraic specification and verification of distributed systems, and some of the most prominent formal verification techniques. The author employs µCRL as the vehicle, a language developed to combine process algebra and abstract data types. The book evolved from introductory courses on protocol verification taught to undergraduate and graduate students of computer science, and the text is supported throughout with examples and exercises. Full solutions are provided in an appendix, while exercise sheets, lab exercises, example specifications and lecturer slides are available on the author's website.
£40.49
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG The Disappearing Computer: Interaction Design, System Infrastructures and Applications for Smart Environments
This book examines how the computer, as we currently know it, will be replaced by a new generation of technologies, moving computing off the desktop and ultimately integrating it with real world objects and everyday environments. It provides a unique combination of concepts, methods and prototypes of ubiquitous and pervasive computing reflecting the current interest in smart environments and ambient intelligence.
£44.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Therapeutic Antibodies
This essential work, edited by two researchers at London’s famous Queen Mary’s medical school targets one of the most important areas in medical development today. These days, antibody therapeutics are the treatment of choice for several autoimmune and oncological conditions. They are, indeed, becoming the molecules of choice for further combination therapies and cell engineering. In this timely work, a slew of expert in the field of drug development summarize all the current developments and clinical successes.
£224.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Medizinische Physik 3: Medizinische Laserphysik
Die medizinische Physik hat sich in den letzten Jahren zunehmend als interdisziplinäres Gebiet profiliert. Um dem Bedarf nach systematischer Weiterbildung von Physikern, die an medizinischen Einrichtungen tätig sind, gerecht zu werden, wurde das vorliegende Werk geschaffen. Es basiert auf dem Heidelberger Kurs für medizinische Physik. Die drei Bände vermitteln das für die Fachanerkennung als Medizinphysiker notwendige medizinische und physikalische Wissen. Im Band I werden die medizinischen, medizintechnischen und biomathematischen Grundlagen behandelt. Band II ist der medizinischen Strahlenphysik, Tomographie, Ultraschalldiagnose, Nuklearmedizin und dem Strahlenschutz gewidmet. Band III stellt Grundlagen und Anwendung der medizinischen Laserphysik und Optik vor.
£80.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG In Memoriam Albert Döderlein
Der Gyn{kologe Albert D|derlein, ein leidenschaftlicher Arzt und Forscher, ist mit seinen Arbeiten }ber die Scheidenflora zu Weltruhm gelangt. 1992 wares 100 Jahre her, da~ die nach ihm benannten D|derlein-St{bchen entdeckt wurden. Dies war f}r die Autoren Anla~ genug, um }ber das Leben und Wirken Albert D|derleins nachzudenken. Den Menschen Albert D|derleinzu zeigen, war neben der W}rdigung seines wissen- schaftlichen Werkes Ziel dieser Publikation. Ein gl}cklicher Zufall erm|glichte den Kontakt zu einer Enkelin D|derleins, Frau Dr. Annamarie D|derlein, die es verstand, diese interessante Familiengeschichte lebhaft, spannend und ab- wechslungsreich zu erz{hlen. So wendet sich dieses Werk an alle, diesich der Gyn{kologie verbunden f}hlen und Interesse and der Geschichte der Medizin zeigen.
£42.29
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Critical Phenomena in Natural Sciences: Chaos, Fractals, Selforganization and Disorder: Concepts and Tools
Concepts, methods and techniques of statistical physics in the study of correlated, as well as uncorrelated, phenomena are being applied ever increasingly in the natural sciences, biology and economics in an attempt to understand and model the large variability and risks of phenomena. This is the first textbook written by a well-known expert that provides a modern up-to-date introduction for workers outside statistical physics.
£64.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Kundenindividuelle Massenproduktion: Entwicklung, Vorbereitung der Herstellung, Veränderungsmanagement
£62.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG DGOR: Papers of the 10th Annual Meeting/Vorträge der 10. Jahrestagung
Die 10. Jahrestagung der Deutschen Gesellschaft fOr Operations Research fand vom 30. September bis 2. Oktober 1981 an der Universitat GOttingen statt. Die Tagung bot einen Oberblick Ober neueste Ergebnisse der Forschung und der Anwendung des Operations Research; fOr die etwa 400 Teilnehmer war sie wieder ein bewahrtes Fo- rum zum Austausch von Erfahrungen sowohl zwischen Experten als auch zwischen den Hochschulen und der Praxis. Das wissenschaftliche Programm, bestehend aus 122 Vortragen, ist in 22 Sek- tionen eingeteilt, die jeweils bestimmten mathematischen Modellen und Methoden oder einem bestimmten Anwendungsgebiet gewidmet sind; eine Sektion befaBt sich mit der Modellstrukturierung. Viele Sektionen werden durch ein Obersichtsreferat eingeleitel. Die Gestaltung des Programms ist zu einem groBen Teil das Verdienst der einzelnen Sektionsleiter. Ihnen gebOhrt dafOr herzlicher Dank. Wahrend bei dieser wie bei frOheren Jahrestagungen die Teilnehmer etwa in glei- cher Anzahl von Hochschulen wie aus der Praxis kommen, werden die Vortrage doch zu fast drei Vierteln von HochschulangehOrigen gehalten. Zwei neu in das Programm aufgenommene Sektionen, ,,Anwendungsberichte aus der Praxis im Offentlichen Be- reich" und ,,Anwendungsberichte aus der industriellen Praxis", tragen dem Rech- nung. Hier wird von den Anwendern selbst oder mit ihrer Beteiligung der erfolgreiche Einsatz von OR-Methoden geschildert. Diese Beitrage gehen Ober die haufig anzu- treffende Darstellung eines nur anwendbaren Modells hinaus.
£42.29
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Contrast Media in Radiology: Appraisal and Prospects
Journalists, always very direct and in search of sensation, essentially asked me two questions on the occasion of this workshop: What were the goals of the meeting? With the improvement of diagnosis through the development of image techniques, didn't the contrast media already have their future behind them? Many answers were provided during the course of the workshop, and in order to best answer the journalists I proposed the following synopsis. 1. Since the 1979 Colorado Springs workshop organized by E. Lasser, progress has been so rapid and the newly available works so numerous that another meeting on an international level for the purpose of pre senting and discussing these advances appeared indispensable. Why not then in Europe and why not in Lyon? To expand on this progress, by 1981 the new contrast media with less-hyperosmolar molecules, still in the trial stage in 1979, were al most all available commercially for angiography, albeit at prohibitive prices. The advantages of these various media are becoming better known; moreover, in the wake of Lasser's work, our understanding of the pathophysiology of their noxious effects is also advancing rapidly owing to the use of models (for the target organs: heart, vessel wall, nervous system, kidney; and for the more general reactions: blood cells, coagulation, complement system, circulating enzymatic systems). In addition, further new molecules are currently being studied in re search laboratories. 2.
£80.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Class 5: Isomerases
The Springer Handbook of Enzymes provides concise data on some 5,000 enzymes sufficiently well characterized – and here is the second, updated edition. Their application in analytical, synthetic and biotechnology processes as well as in food industry, and for medicinal treatments is added. Data sheets are arranged in their EC-Number sequence. The new edition reflects considerable progress in enzymology: the total material has more than doubled, and the complete 2nd edition consists of 39 volumes plus Synonym Index. Starting in 2009, all newly classified enzymes are treated in Supplement Volumes.
£206.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Kindlers Literatur Lexikon (KLL): Band 13: Pin–Roo
Darauf haben Interessierte und Kenner gewartet: Kindlers Literatur Lexikon neu aufgelegt. Von den ersten schriftlichen Zeugnissen der Menschheit bis zur Gegenwart versammelt das epochale Nachschlagewerk rund 13.000 Werke aus allen Literaturen der Welt. Völlig neu bearbeitet und um eine Fülle von Einträgen ergänzt, erschließt das Werklexikon in 17 Bänden und einem Registerband Belletristik, Briefe, Tagebücher und Memoiren, Populär-, Kinder- und Jugendliteratur sowie Sachtexte vielfältiger Disziplinen. Neu: Einleitende Biogramme (biografische Kurzinformationen) skizzieren die zentralen Lebensdaten der Autoren. Eine Vielzahl zusätzlicher Werkgruppenartikel eröffnet kompakte Einblicke in das Gesamtwerk einzelner Schriftsteller. Die komplett überarbeiteten Literaturangaben schaffen mit Hinweisen auf die wichtigsten weiterführenden Werke eine fundierte wissenschaftliche Basis. Rund 600 anonyme Werke und Artikel zu Stoffen der Weltliteratur runden das Lexikon ab. Ein unentbehrlicher und einzigartiger Wissensfundus.
£119.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Kindlers Literatur Lexikon (KLL): Band 16: Tab–Vik
Darauf haben Interessierte und Kenner gewartet: Kindlers Literatur Lexikon neu aufgelegt. Von den ersten schriftlichen Zeugnissen der Menschheit bis zur Gegenwart versammelt das epochale Nachschlagewerk rund 13.000 Werke aus allen Literaturen der Welt. Völlig neu bearbeitet und um eine Fülle von Einträgen ergänzt, erschließt das Werklexikon in 17 Bänden und einem Registerband Belletristik, Briefe, Tagebücher und Memoiren, Populär-, Kinder- und Jugendliteratur sowie Sachtexte vielfältiger Disziplinen. Neu: Einleitende Biogramme (biografische Kurzinformationen) skizzieren die zentralen Lebensdaten der Autoren. Eine Vielzahl zusätzlicher Werkgruppenartikel eröffnet kompakte Einblicke in das Gesamtwerk einzelner Schriftsteller. Die komplett überarbeiteten Literaturangaben schaffen mit Hinweisen auf die wichtigsten weiterführenden Werke eine fundierte wissenschaftliche Basis. Rund 600 anonyme Werke und Artikel zu Stoffen der Weltliteratur runden das Lexikon ab. Ein unentbehrlicher und einzigartiger Wissensfundus.
£119.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Kindlers Literatur Lexikon (KLL): Band 11: Mas–Nek
Darauf haben Interessierte und Kenner gewartet: Kindlers Literatur Lexikon neu aufgelegt. Von den ersten schriftlichen Zeugnissen der Menschheit bis zur Gegenwart versammelt das epochale Nachschlagewerk rund 13.000 Werke aus allen Literaturen der Welt. Völlig neu bearbeitet und um eine Fülle von Einträgen ergänzt, erschließt das Werklexikon in 17 Bänden und einem Registerband Belletristik, Briefe, Tagebücher und Memoiren, Populär-, Kinder- und Jugendliteratur sowie Sachtexte vielfältiger Disziplinen. Neu: Einleitende Biogramme (biografische Kurzinformationen) skizzieren die zentralen Lebensdaten der Autoren. Eine Vielzahl zusätzlicher Werkgruppenartikel eröffnet kompakte Einblicke in das Gesamtwerk einzelner Schriftsteller. Die komplett überarbeiteten Literaturangaben schaffen mit Hinweisen auf die wichtigsten weiterführenden Werke eine fundierte wissenschaftliche Basis. Rund 600 anonyme Werke und Artikel zu Stoffen der Weltliteratur runden das Lexikon ab. Ein unentbehrlicher und einzigartiger Wissensfundus.
£119.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Kindlers Literatur Lexikon (KLL): Band 1: A–Bak
Darauf haben Interessierte und Kenner gewartet: Kindlers Literatur Lexikon neu aufgelegt. Von den ersten schriftlichen Zeugnissen der Menschheit bis zur Gegenwart versammelt das epochale Nachschlagewerk rund 13.000 Werke aus allen Literaturen der Welt. Völlig neu bearbeitet und um eine Fülle von Einträgen ergänzt, erschließt das Werklexikon in 17 Bänden und einem Registerband Belletristik, Briefe, Tagebücher und Memoiren, Populär-, Kinder- und Jugendliteratur sowie Sachtexte vielfältiger Disziplinen. Neu: Einleitende Biogramme (biografische Kurzinformationen) skizzieren die zentralen Lebensdaten der Autoren. Eine Vielzahl zusätzlicher Werkgruppenartikel eröffnet kompakte Einblicke in das Gesamtwerk einzelner Schriftsteller. Die komplett überarbeiteten Literaturangaben schaffen mit Hinweisen auf die wichtigsten weiterführenden Werke eine fundierte wissenschaftliche Basis. Rund 600 anonyme Werke und Artikel zu Stoffen der Weltliteratur runden das Lexikon ab. Ein unentbehrlicher und einzigartiger Wissensfundus.
£119.99
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Tourismus: Systematische Einführung — Analysen und Prognosen
£34.19
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Supplier Relationship Management: How to Maximize Vendor Value and Opportunity
There’s a new buzz phrase in the air: Supplier Relationship Management (SRM). Corporate executives know it’s necessary, but there’s only one problem. Nobody yet knows how to do it. Or they think it’s all about bashing your vendors over the head until they reduce the price another 4%. Supplier Relationship Management: How to Maximize Vendor Value and Opportunity changes all that. Containing the best and most innovative advice from the operations and procurement experts at consultant AT Kearney, this book shows that SRM is at root a strategic discussion requiring cross-functional interaction and internal alignment at the highest levels. It requires an honest appraisal of the value that suppliers now bring to your firm, as well as their potential value. It then requires a frank and constructive business-to-business dialogue about how to improve the relationship. When this happens, a company reaps myriad benefits, ranging from new opportunity to added value to competitive advantage—and, quite likely, to overall (and sometimes substantial) cost reductions. This book shows the most concrete methods you can use today to: Identify value-adding opportunities in the supply chain Work closely with suppliers to maximize the benefits Work the "Critical Cluster" of suppliers, where the greatest opportunity for advantage lies Review suppliers to encourage constant gains in quality and cost Turn your SRM strategy into a major competitive advantage Supplier Relationship Management introduces and explains the Supplier Interaction Model, a key tool that will help you get the most from your supplier relationships. It segments the supplier universe into nine categories, from those you want to run away from fast to those so good and so useful to your organization that it can make sense to invest in them directly. Numerous case studies show how to apply the principles to your situation. Supplier Relationship Management burns off the fog that has surrounded the procurement process for far too long. It is the definitive guide for business executives who want to get the maximum benefits from suppliers and gain very real advantages over competitors.
£54.99