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James Taylor

Bio: James Taylor is an academic researcher from Newcastle University. The author has contributed to research in topics: Laser & Fiber laser. The author has an hindex of 95, co-authored 1161 publications receiving 39945 citations. Previous affiliations of James Taylor include Institut national de la recherche agronomique & European Spallation Source.


Papers
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15 Mar 1976
TL;DR: CADET is applied to the study of a complicated, highly nonlinear model for a tactical missile homing guidance system and provides accurate missile performance projections with a small fraction of the computer time required for a comparably reliable monte carlo analysis.
Abstract: : The Covariance Analysis DEscribing Function Technique (CADET) -- a technique conceived at TASC for the efficient direct statistical analysis of nonlinear systems with random inputs -- is applied to the study of a complicated, highly nonlinear model for a tactical missile homing guidance system Numerous parameter sensitivity studies are performed, with selected cases verified by the monte carlo method The validity of the assumptions underlying the CADET theory is investigated and the impact of possible errors in these assumptions on the accuracy of CADET is assessed In every realistic situation studied, CADET provides accurate missile performance projections with a small fraction of the computer time required for a comparably reliable monte carlo analysis

3 citations

19 May 1992
TL;DR: In this article, the average soliton concept is extended to regions where z/sub 0/ is comparable to Z/sub a/, where Z is the amplification period and S is the characteristic soliton period.
Abstract: To describe the propagation of a soliton in a medium where it experiences a periodic gain or loss, the concept of the guiding centre or average soliton has proven invaluable. It has been shown that stable pulse propagation can be achieved provided that z/sub 0/>>z/sub a/, where z/sub a/ is the amplification period and z/sub 0/ is the characteristic soliton period. By extending the average soliton concept to regions where z/sub 0/ is comparable to z/sub a/, theoretical and experimental results are presented which propose a mechanism for the instability of short pulse fibre soliton lasers, distinct from modulational instability, which clearly can be ruled out as the instability mechanism, due to the nature of the power scaling of the generated spectral modulations. A good agreement has been shown between theory and experiment for the proposed model of this instability process.

3 citations

Patent
06 Oct 2000
TL;DR: In this article, an apparatus for infrared radiation transmission, primarily in the mid-infrared spectrum, consisting of a mirrored ellipsoidal cavity which collects infrared radiation from a source such as a glowbar, a silicon carbide element or an infrared laser diode, is described.
Abstract: The invention relates to an apparatus for infrared radiation transmission, primarily in the mid-infrared spectrum. The system comprises a mirrored ellipsoidal cavity which collects infrared radiation from a source such as a glowbar, a silicon carbide element or an infrared laser diode. The collected radiation is directed to an interferometer such as Michaelson interferometer as used in FT-IR. An output beam is directed to a fiber bundle having a symmetrical array of optical fibers including silver halide in combination with zirconium fluoride and/or silica fibers. The fiber bundle provides high broadband mid-infrared energy transmission. A system for infrared analysis of a fluid is disclosed additionally comprising a radiation directing means to direct infrared radiation through a sample to be analysed, and to a detector for determining IR radiation directed through the sample. The apparatus and system may be used for monitoring and controlling semiconductor device manufacturing processes, such as chemical vapor deposition (CVD) by focussing an infrared probe beam within a gas associated with a CVD reaction chamber.

3 citations

Proceedings ArticleDOI
30 Oct 2008
TL;DR: In this paper, an improved understanding of the non-linear processes involved in CW pumped supercontinuum sources, evidenced by the strong agreement between theoretical prediction and experimental realization, high power cw Yb-fibre lasers have been deployed with photonic crystal fibre in all-fiber configurations enabling short wavelength generation down to 600 nm with spectral power densities in excess of 2 mW/nm, while in the infra red over 100 mW /nm has been demonstrated.
Abstract: Through an improved understanding of the non linear processes involved in CW pumped supercontinuum sources, evidenced by the strong agreement between theoretical prediction and experimental realization, high power cw Yb-fibre lasers have been deployed with photonic crystal fibre in all-fibre configurations enabling short wavelength generation down to 600 nm with spectral power densities in excess of 2 mW/nm, while in the infra red over 100 mW /nm has been demonstrated.

3 citations

Proceedings Article
16 May 2004
TL;DR: In this article, the authors analyzed noise, temporal and spectral power density properties of 5.5 W, CW Raman-soliton continua with >300 nm bandwidth around 1.3 /spl mu/m generated in a holey-fibre pumped by Yb fiber sources.
Abstract: We analyzed noise, temporal and spectral-power-density properties of 5.5 W, CW Raman-soliton continua with >300 nm bandwidth around 1.3 /spl mu/m generated in a holey-fibre pumped by Yb-fibre sources. Fibre-laser and MOPFA pumping configurations are compared.

3 citations


Cited by
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Journal ArticleDOI

[...]

08 Dec 2001-BMJ
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

33,785 citations

01 Jan 2016
TL;DR: The using multivariate statistics is universally compatible with any devices to read, allowing you to get the most less latency time to download any of the authors' books like this one.
Abstract: Thank you for downloading using multivariate statistics. As you may know, people have look hundreds times for their favorite novels like this using multivariate statistics, but end up in infectious downloads. Rather than reading a good book with a cup of tea in the afternoon, instead they juggled with some harmful bugs inside their laptop. using multivariate statistics is available in our digital library an online access to it is set as public so you can download it instantly. Our books collection saves in multiple locations, allowing you to get the most less latency time to download any of our books like this one. Merely said, the using multivariate statistics is universally compatible with any devices to read.

14,604 citations

Journal Article
TL;DR: This book by a teacher of statistics (as well as a consultant for "experimenters") is a comprehensive study of the philosophical background for the statistical design of experiment.
Abstract: THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

13,333 citations

Journal ArticleDOI
TL;DR: Machine learning addresses many of the same research questions as the fields of statistics, data mining, and psychology, but with differences of emphasis.
Abstract: Machine Learning is the study of methods for programming computers to learn. Computers are applied to a wide range of tasks, and for most of these it is relatively easy for programmers to design and implement the necessary software. However, there are many tasks for which this is difficult or impossible. These can be divided into four general categories. First, there are problems for which there exist no human experts. For example, in modern automated manufacturing facilities, there is a need to predict machine failures before they occur by analyzing sensor readings. Because the machines are new, there are no human experts who can be interviewed by a programmer to provide the knowledge necessary to build a computer system. A machine learning system can study recorded data and subsequent machine failures and learn prediction rules. Second, there are problems where human experts exist, but where they are unable to explain their expertise. This is the case in many perceptual tasks, such as speech recognition, hand-writing recognition, and natural language understanding. Virtually all humans exhibit expert-level abilities on these tasks, but none of them can describe the detailed steps that they follow as they perform them. Fortunately, humans can provide machines with examples of the inputs and correct outputs for these tasks, so machine learning algorithms can learn to map the inputs to the outputs. Third, there are problems where phenomena are changing rapidly. In finance, for example, people would like to predict the future behavior of the stock market, of consumer purchases, or of exchange rates. These behaviors change frequently, so that even if a programmer could construct a good predictive computer program, it would need to be rewritten frequently. A learning program can relieve the programmer of this burden by constantly modifying and tuning a set of learned prediction rules. Fourth, there are applications that need to be customized for each computer user separately. Consider, for example, a program to filter unwanted electronic mail messages. Different users will need different filters. It is unreasonable to expect each user to program his or her own rules, and it is infeasible to provide every user with a software engineer to keep the rules up-to-date. A machine learning system can learn which mail messages the user rejects and maintain the filtering rules automatically. Machine learning addresses many of the same research questions as the fields of statistics, data mining, and psychology, but with differences of emphasis. Statistics focuses on understanding the phenomena that have generated the data, often with the goal of testing different hypotheses about those phenomena. Data mining seeks to find patterns in the data that are understandable by people. Psychological studies of human learning aspire to understand the mechanisms underlying the various learning behaviors exhibited by people (concept learning, skill acquisition, strategy change, etc.).

13,246 citations

Book
01 Jan 1994
TL;DR: In this paper, the authors present a brief history of LMIs in control theory and discuss some of the standard problems involved in LMIs, such as linear matrix inequalities, linear differential inequalities, and matrix problems with analytic solutions.
Abstract: Preface 1. Introduction Overview A Brief History of LMIs in Control Theory Notes on the Style of the Book Origin of the Book 2. Some Standard Problems Involving LMIs. Linear Matrix Inequalities Some Standard Problems Ellipsoid Algorithm Interior-Point Methods Strict and Nonstrict LMIs Miscellaneous Results on Matrix Inequalities Some LMI Problems with Analytic Solutions 3. Some Matrix Problems. Minimizing Condition Number by Scaling Minimizing Condition Number of a Positive-Definite Matrix Minimizing Norm by Scaling Rescaling a Matrix Positive-Definite Matrix Completion Problems Quadratic Approximation of a Polytopic Norm Ellipsoidal Approximation 4. Linear Differential Inclusions. Differential Inclusions Some Specific LDIs Nonlinear System Analysis via LDIs 5. Analysis of LDIs: State Properties. Quadratic Stability Invariant Ellipsoids 6. Analysis of LDIs: Input/Output Properties. Input-to-State Properties State-to-Output Properties Input-to-Output Properties 7. State-Feedback Synthesis for LDIs. Static State-Feedback Controllers State Properties Input-to-State Properties State-to-Output Properties Input-to-Output Properties Observer-Based Controllers for Nonlinear Systems 8. Lure and Multiplier Methods. Analysis of Lure Systems Integral Quadratic Constraints Multipliers for Systems with Unknown Parameters 9. Systems with Multiplicative Noise. Analysis of Systems with Multiplicative Noise State-Feedback Synthesis 10. Miscellaneous Problems. Optimization over an Affine Family of Linear Systems Analysis of Systems with LTI Perturbations Positive Orthant Stabilizability Linear Systems with Delays Interpolation Problems The Inverse Problem of Optimal Control System Realization Problems Multi-Criterion LQG Nonconvex Multi-Criterion Quadratic Problems Notation List of Acronyms Bibliography Index.

11,085 citations