To solve performance problems in modern computing infrastructures, often comprising thousands of servers running hundreds of applications, spanning multiple tiers, you need tools that go beyond mere reporting. You need tools that enable performance analysis of application workflow across the entire enterprise. That's what PDQ (Pretty Damn Quick) provides. PDQ is an open-source performance analyzer based on the paradigm of queues. Queues are ubiquitous in every computing environment as buffers, and since any application architecture can be represented as a circuit of queueing delays, PDQ is a natural fit for analyzing system performance. Building on the success of the first edition, this considerably expanded second edition now comprises four parts. Part I contains the foundational concepts, as well as a new first chapter that explains the central role of queues in successful performance analysis. Part II provides the basics of queueing theory in a highly intelligible style for the non-mathematician; little more than high-school algebra being required. Part III presents many practical examples of how PDQ can be applied. The PDQ manual has been relegated to an appendix in Part IV, along with solutions to the exercises contained in each chapter. Throughout, the Perl code listings have been newly formatted to improve readability. The PDQ code and updates to the PDQ manual are available from the author's web site at www.perfdynamics.com

Description PDQ Medical Genetics challenges students to learn to think genetically, to recognize genetic factors, and to explain genetics to patients. The author presents an approach to solving clinical problems with genetic components rather than on the presentation of facts that would soon fall out of date. The text is problem-oriented. Each chapter opens with a case scenario designed to direct the student toward learning both the clinical and the basic biological science. The featured scenarios also provide direction in the dealing with a patient's, and family's, personal difficulties by listing genetic disease support groups. The informative text also emphasizes how to go about obtaining the latest information on such topics as molecular testing and imaging techniques. Key Features Features topics not found in most genetics texts designed primarily for medical students such as complex disorders, ambiguous genitalia, pharmacogenetics, and bone dyspasias. Includes a dual-platform mini-CD-ROM with the complete text and illustrations, in fully searchable PDF files Incorporates references and links to carefully selected websites for additional readings and a bonus self-assessment question and answer section for each chapter - all included on the accompanying CD-ROM This book will help students understand the nature of genetics and how its principles flow from those of evolution and natural selection. It provides to the medical student an approach to solving clinical probl ems and provides a conceptual framework within which to sort it all ou t. Davidson approaches the subject of medical genetics as students wil l encounter it - clinically. The book is problem-based, and each chapt er begins with a case scenario requiring a knowledge of genetics with which the practicing physician will have to come to grips fairly frequ ently with the emphasis on having the student recognize the applicatio ns of basic science data and solving the problem presented. It

The third edition of PDQ Statistics provides an overview of all major statistical methods, giving the reader a good understanding of statistics and how they are used in research articles. It covers the major categories – variable and descriptive statistics, parametric statistics, non-parametric statistics, and multivariate statistics. The explanations are clear, succinct, and loaded with practical examples.

What little-known son of a famous genius has been called: "A musical blight" "A one-man plague" "History's most justifiably neglected composer" "The worst musician ever to trod organ pedals" "A pimple on the face of music" In this long-awaited hoax, possibly the most unimportant piece of scholarship in over two thousand years, Professor Peter Schickele has finally succeeded in ripping the veil of obscurity from the most unusual -- to put it kindly -- composer in the history of music: P.D.Q. Bach, the last and unquestionably the least of the great Johann Sebastian Bach's many children.