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Author: I.T. Jolliffe Publisher: Springer Science & Business Media ISBN: 1475719043 Category : Mathematics Languages : en Pages : 283
Book Description
Principal component analysis is probably the oldest and best known of the It was first introduced by Pearson (1901), techniques ofmultivariate analysis. and developed independently by Hotelling (1933). Like many multivariate methods, it was not widely used until the advent of electronic computers, but it is now weIl entrenched in virtually every statistical computer package. The central idea of principal component analysis is to reduce the dimen sionality of a data set in which there are a large number of interrelated variables, while retaining as much as possible of the variation present in the data set. This reduction is achieved by transforming to a new set of variables, the principal components, which are uncorrelated, and which are ordered so that the first few retain most of the variation present in all of the original variables. Computation of the principal components reduces to the solution of an eigenvalue-eigenvector problem for a positive-semidefinite symmetrie matrix. Thus, the definition and computation of principal components are straightforward but, as will be seen, this apparently simple technique has a wide variety of different applications, as weIl as a number of different deri vations. Any feelings that principal component analysis is a narrow subject should soon be dispelled by the present book; indeed some quite broad topics which are related to principal component analysis receive no more than a brief mention in the final two chapters.
Author: I.T. Jolliffe Publisher: Springer Science & Business Media ISBN: 1475719043 Category : Mathematics Languages : en Pages : 283
Book Description
Principal component analysis is probably the oldest and best known of the It was first introduced by Pearson (1901), techniques ofmultivariate analysis. and developed independently by Hotelling (1933). Like many multivariate methods, it was not widely used until the advent of electronic computers, but it is now weIl entrenched in virtually every statistical computer package. The central idea of principal component analysis is to reduce the dimen sionality of a data set in which there are a large number of interrelated variables, while retaining as much as possible of the variation present in the data set. This reduction is achieved by transforming to a new set of variables, the principal components, which are uncorrelated, and which are ordered so that the first few retain most of the variation present in all of the original variables. Computation of the principal components reduces to the solution of an eigenvalue-eigenvector problem for a positive-semidefinite symmetrie matrix. Thus, the definition and computation of principal components are straightforward but, as will be seen, this apparently simple technique has a wide variety of different applications, as weIl as a number of different deri vations. Any feelings that principal component analysis is a narrow subject should soon be dispelled by the present book; indeed some quite broad topics which are related to principal component analysis receive no more than a brief mention in the final two chapters.
Author: Fumito Koike Publisher: World Conservation Union ISBN: Category : Nature Languages : en Pages : 228
Book Description
Biological invasion, an issue of growing importance due to the significant increase in international transportation and trade, can disturb the balance of local ecosystems and even destroy them. This collection of papers presented at the International Conference on Assessment and Control of Biological Invasion Risks held in August 2004 at Yokohama National University discusses risk assessment, risk management and eradication. It also includes contributions reporting on the current status of invasion and the properties of alien species in East Asia.
Author: Christian Welzel Publisher: Cambridge University Press ISBN: 1107034701 Category : Political Science Languages : en Pages : 473
Book Description
This is the first study to demonstrate the role of cultural change in the global rise of freedoms. In multiple ways, the author illustrates how emerging "emancipative values" intertwine technological and institutional changes into a single trend toward human empowerment. The author interprets his broad and far-reaching findings from societies around the world in a new and coherent framework: the evolutionary theory of emancipation.
Author: John P. Burrows Publisher: Springer Science & Business Media ISBN: 3642147917 Category : Technology & Engineering Languages : en Pages : 576
Book Description
The impact of anthropogenic activities on our atmospheric environment is of growing public concern and satellite-based techniques now provide an essential component of observational strategies on regional and global scales. The purpose of this book is to summarise the state of the art in the field in general, while describing both key techniques and findings in particular. It opens with an historical perspective of the field together with the basic principles of remote sensing from space. Three chapters follow on the techniques and on the solutions to the problems associated with the various spectral regions in which observations are made. The particular challenges posed by aerosols and clouds are covered in the next two chapters. Of special importance is the accuracy and reliability of remote sensing data and these issues are covered in a chapter on validation. The final section of the book is concerned with the exploitation of data, with chapters on observational aspects, which includes both individual and synergistic studies, and on the comparison of global and regional observations with chemical transport and climate models and the added value that the interaction brings to both. The book concludes with scientific needs and likely future developments in the field, and the necessary actions to be taken if we are to have the global observation system that the Earth needs in its present, deteriorating state. The appendices provide a comprehensive list of satellite instruments, global representations of some ancillary data such as fire counts and light pollution, a list of abbreviations and acronyms, and a set of colourful timelines indicating the satellite coverage of tropospheric composition in the foreseeable future. Altogether, this book will be a timely reference and overview for anyone working at the interface of environmental, atmospheric and space sciences.
Author: John H. Pryor Publisher: Cambridge University Press ISBN: 9780521428927 Category : History Languages : en Pages : 268
Book Description
A study of the technological limitations of maritime traffic in the Mediterranean, seen in conjunction with the geographical conditions within which it operated.
Author: R. H. Charlier Publisher: Springer Science & Business Media ISBN: 3540779329 Category : Science Languages : en Pages : 270
Book Description
Engineers’ dreams and fossil energy replacement schemes can come true. Man has been tapping the energy of the sea to provide power for his industries for centuries. Tidal energy combined with that of waves and marine winds rank among those most successfully put the work. Large scale plants are capital intensive but smaller ones, particularly built in China, have proven profitable. Since the initiation of the St Malo project in France, similar projects have gone into active service where methods have been devised to cut down on costs, new types of turbines developed and cost competitiveness considerably improved. Tidal power has enormous potential. The book reviews recent progress in extracting power from the ocean, surveys the history of tidal power harnessing and updates a prior publication by the author.
Author: Ruth Macrides Publisher: Taylor & Francis ISBN: 1351877674 Category : History Languages : en Pages : 316
Book Description
This latest volume in the SPBS series makes a notable contribution to our understanding both of the evidence for travel, and of the realities and perceptions of communications in the Byzantine world. Four aspects of travel in the Byzantine world, from the 6th to the 15th century, are examined: technicalities of travel on land and sea, purposes of travel, foreign visitors' perceptions of Constantinople, and the representation of the travel experience in images and in written accounts. Sources used to illuminate these aspects include descriptions of journeys, pilot books, bilingual word lists, shipwrecks, monastic documents, but as the opening paper shows the range of such sources can be far wider than generally supposed. The contributors highlight road and travel conditions for horses and humans, types of ships and speed of sea journeys, the nature of trade in the Mediterranean, the continuity of pilgrimage to the Holy Land, attitudes toward travel. Patterns of communication in the Mediterranean are revealed through distribution of ceramic finds, letter collections, and the spread of the plague.
Author: Jacco Dieleman Publisher: BRILL ISBN: 9047406745 Category : History Languages : en Pages : 372
Book Description
This book is an investigation into the sphere of production and use of two related bilingual magical handbooks found as part of a larger collection of magical and alchemical manuscripts around 1828 in the hills surrounding Luxor, Egypt. Both handbooks, dating to the Roman period, contain an assortment of recipes for magical rites in the Demotic and Greek language. The library which comprises these two handbooks is nowadays better known as the Theban Magical Library. The book traces the social and cultural milieu of the composers, compilers and users of the extant spells through a combination of philology, sociolinguistics and cultural analysis. To anybody working on Greco-Roman Egypt, ancient magic, and bilingualism this study is of significant importance.
Author: Mark C. Amodio Publisher: ISBN: 9781641893381 Category : Languages : en Pages :
Book Description
This collection brings together newly commissioned and cutting-edge essays on oral text and tradition ranging from the ancient and medieval world to the present day by an international group of leading oral theorists drawn from Europe and North America. Using a range of materials including the Bible, Greek epic, Beowulf, Old Norse and Old English riddles, and medieval music, the contributors collectively work to refine, challenge, and further advance contemporary Oral Theory, an interdisciplinary school of thought heavily influenced by John Miles Foley, whose work provides the jumping-off point for this volume. The book includes a useful introduction to the history of oral theory, and Foley's ground-breaking and influential work.
Author: I.T. Jolliffe
Author: I.T. Jolliffe
Author: Fumito Koike
Author: Christian Welzel
Author: John P. Burrows
Author: John H. Pryor
Author: Center for Democracy and Reconciliation in Southeast Europe
Author: R. H. Charlier
Author: Ruth Macrides
Author: Jacco Dieleman
Author: Mark C. Amodio