William A. Yarberry Jr.'s Books

Computer Telephony Integration

By: William A. Yarberry Jr.

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Computer Telephony Integration

By: William A. Yarberry Jr.

Since the publication of the first edition, the CTI world has changed significantly. Where it was once focused on the integration of voice systems with computers, the focus is now on IP-based voice, or converged networks and services. Today, the telcos are upgrading their systems from circuit-switched to IP-based packet-switched networks. Companies

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Page Count

432

Publisher

CRC Press

Published Date

ISBN 10

1420000403

ISBN 13

9781420000405

Telecommunications Cost Management

By: Brian Dimarsico,William A. Yarberry Jr.,Thomas Phelphs

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Telecommunications Cost Management

By: Brian Dimarsico,William A. Yarberry Jr.,Thomas Phelphs

Busy decision-makers need the specifics quickly, without plowing through details that do not affect the economics of a project. Telecommunications Cost Management presents the key facts up front, with sample calculations for broadband, local access, equipment, and service alternatives. It provides a blueprint for cost reduction across all major technologies - from frame relay to IP telephony to contract recommendations. The text presents scenarios showing the effect of different architectural strategies for both voice and data communications. An Architectural Review lists alternatives to the traditional PBX and discusses how to minimize local access costs.

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Page Count

354

Publisher

CRC Press

Published Date

ISBN 10

1420000136

ISBN 13

9781420000139

Iso 9001

2000 for Software and Systems Providers: An Engineering Approach

By: Robert Bamford,William J. Deibler II

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Iso 9001

2000 for Software and Systems Providers: An Engineering Approach

By: Robert Bamford,William J. Deibler II

Executives, engineering managers, project managers, engineers, and process improvement experts within engineering organizations need a resource that systematically translates the requirements of ISO 9001:2000 into a usable specification for engineers. Understanding ISO 9001:2000 from an engineer's perspective ensures that software, hardware, and sy

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Page Count

328

Publisher

CRC Press

Published Date

ISBN 10

0203504216

ISBN 13

9780203504215

CRAN Recipes

DPLYR, Stringr, Lubridate, and RegEx in R

By: William Yarberry

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CRAN Recipes

DPLYR, Stringr, Lubridate, and RegEx in R

By: William Yarberry

Want to use the power of R sooner rather than later? Don’t have time to plow through wordy texts and online manuals? Use this book for quick, simple code to get your projects up and running. It includes code and examples applicable to many disciplines. Written in everyday language with a minimum of complexity, each chapter provides the building blocks you need to fit R’s astounding capabilities to your analytics, reporting, and visualization needs. CRAN Recipes recognizes how needless jargon and complexity get in your way. Busy professionals need simple examples and intuitive descriptions; side trips and meandering philosophical discussions are left for other books. Here R scripts are condensed, to the extent possible, to copy-paste-run format. Chapters and examples are structured to purpose rather than particular functions (e.g., “dirty data cleanup” rather than the R package name “janitor”). Everyday language eliminates the need to know functions/packages in advance. What You Will Learn Carry out input/output; visualizations; data munging; manipulations at the group level; and quick data exploration Handle forecasting (multivariate, time series, logistic regression, Facebook’s Prophet, and others) Use text analytics; sampling; financial analysis; and advanced pattern matching (regex) Manipulate data using DPLYR: filter, sort, summarize, add new fields to datasets, and apply powerful IF functions Create combinations or subsets of files using joins Write efficient code using pipes to eliminate intermediate steps (MAGRITTR) Work with string/character manipulation of all types (STRINGR) Discover counts, patterns, and how to locate whole words Do wild-card matching, extraction, and invert-match Work with dates using LUBRIDATE Fix dirty data; attractive formatting; bad habits to avoid Who This Book Is For Programmers/data scientists with at least some prior exposure to R.

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Page Count

344

Publisher

Apress

Published Date

ISBN 10

148426875X

ISBN 13

9781484268759

Book's by William A. Yarberry Jr.

Computer Telephony Integration

Computer Telephony Integration

Telecommunications Cost Management

Telecommunications Cost Management

Iso 9001

Iso 9001

CRAN Recipes

CRAN Recipes

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