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Asterisk Cookbook: Solutions to Everyday Telephony Problems
by Leif Madsen Russell BryantAsterisk has a wealth of features to help you customize your PBX to fill very specific business needs. This short cookbook offers recipes for tackling dialplan fundamentals, making and controlling calls, and monitoring channels in your PBX environment. Each recipe includes a simple code solution you can put to work immediately, along with a detailed discussion that offers insight into why and how the recipe works.This book focuses on Asterisk 1.8, although many of the conventions and information presented are version-agnostic. These recipes include solutions to help you:Authenticate callers before moving on in your dialplanRedirect calls received by your auto-attendantCreate an automatic call-back serviceInitiate hot-desking to login to and accept calls at any office deviceMonitor and interrupt live calls to train new employees at a call centerRecord calls from your Asterisk dialplan
Asterisk: Open Source Telephony for the Enterprise
by Leif Madsen Jim Van Meggelen Russell BryantDesign a complete Voice over IP (VoIP) or traditional PBX system with Asterisk, even if you have only basic telecommunications knowledge. This bestselling guide makes it easy with a detailed roadmap that shows you how to install and configure this open source software, whether you’re upgrading your existing phone system or starting from scratch.Ideal for Linux administrators, developers, and power users, this updated fifth edition shows you how to set up VoIP-based private telephone switching systems within the enterprise. You’ll get up to speed on the features in Asterisk 16, the latest long-term support release from Digium. This book also includes new chapters on WebRTC and the Asterisk Real-time Interface (ARI).Discover how WebRTC provides a new direction for AsteriskGain the knowledge to build a simple but complete phone systemBuild an interactive dialplan, using best practices for Asterisk’s advanced featuresLearn how ARI has emerged as the API of choice for interfacing web development languages with Asterisk
Asterisk: The Future of Telephony
by Leif Madsen Jared Smith Jim Van MeggelenThis bestselling book is now the standard guide to building phone systems with Asterisk, the open source IP PBX that has traditional telephony providers running scared! Revised for the 1.4 release of the software, the new edition of Asterisk: The Future of Telephony reveals how you can save money on equipment and support, and finally be in control of your telephone system.If you've worked with telephony in the past, you're familiar with the problem: expensive and inflexible systems that are tuned to the vendor's needs, not yours. Asterisk isn't just a candle in the darkness, it's a whole fireworks show. Because Asterisk is so powerful, configuring it can seem tricky and difficult. This book steps you through the process of installing, configuring, and integrating Asterisk with your existing phone system.You'll learn how to write dialplans, set up applications including speech synthesis and voice recognition, how to script Asterisk, and much more -- everything you need to design a simple but complete system with little or no Asterisk experience, and no more than rudimentary telecommunications knowledge. The book includes:A new chapter on managing/administering your Asterisk systemA new chapter on using Asterisk with databases Coverage of features in Asterisk 1.4A new appendix on dialplan functionsA simplified installation chapterNew simplified SIP configuration, including examples for several popular SIP clients (soft phones and IP telephones)Revised chapters and appendicies reviewed and updated for the latest in features, applications, trends and best-practicesAsterisk is revolutionizing the telecom industry, due in large part to the way it gets along with other network applications. While other PBXs are fighting their inevitable absorption into the network, Asterisk embraces it. If you need to take control of your telephony systems, move to Asterisk and see what the future of telecommunications looks like.
Aston Martin: Made in Britain
by Ben CollinsFrom bestselling author, racer and stunt driver Ben Collins - the man who was The Stig - comes a story of spies, speed and hard-driving genius: a driver's love letter to one of the world's best-loved machines.Aston Martin's first, wickedly fast models were forged at a time when Ferrari's premises at Maranello was nothing but a ploughed field. This book celebrates a century of innovators who kept the fire burning brightly for over a century, from the visionary pioneers Martin and Bamford to modern-day design guru Adrian Newey; from a glamorous web of pre- and post-war spies and racing drivers, to David Brown and the achingly beautiful DB models beloved of Bonds past and present.Ben Collins explores the car with the double-o prefix from a unique perspective behind the wheel, carving through country lanes in his father's V8 Vantage, driving Aston Martins in four James Bond movies and competing against them in the legendary Le Mans 24-hour race.Ultimately, this is a very British success story: of a triumph of engineering that has burned brightly from the Roaring 20s to the 2020s, and an iconic car that never says die.(P)2020 Quercus Editions Limited
Aston Martin: Made in Britain (Planet Omar Ser.)
by Ben Collins'This pacy history of a legendary brand is a love letter to an era of gears and gasoline now accelerating towards its twilight' - Financial Times'[Told] with a genuine affection ... a glorious tale of British seat-of-the-pants invention' - Mail on Sunday---------From bestselling author, racer and stunt driver Ben Collins - the man who was The Stig - comes a story of spies, speed and hard-driving genius: a driver's love letter to one of the world's best-loved machines.Aston Martin's first, wickedly fast models were forged at a time when Ferrari's premises at Maranello was nothing but a ploughed field. This book celebrates a century of innovators who kept the fire burning brightly for over a century, from the visionary pioneers Martin and Bamford to modern-day design guru Adrian Newey; from a glamorous web of pre- and post-war spies and racing drivers, to David Brown and the achingly beautiful DB models beloved of Bonds past and present.Ben Collins explores the car with the double-o prefix from a unique perspective behind the wheel, carving through country lanes in his father's V8 Vantage, driving Aston Martins in four James Bond movies and competing against them in the legendary Le Mans 24-hour race.Ultimately, this is a very British success story: of a triumph of engineering that has burned brightly from the Roaring 20s to the 2020s, and an iconic car that never says die.
Astral Sciences in Early Imperial China: Observation, Sagehood and the Individual
by Morgan Daniel PatrickChallenging monolithic modern narratives about 'Chinese science', Daniel Patrick Morgan examines the astral sciences in China c. 221 BCE-750 CE as a study in the disunities of scientific cultures and the narratives by which ancients and moderns alike have fought to instil them with a sense of unity. The book focuses on four unifying 'legends' recounted by contemporary subjects: the first two, redolent of antiquity, are the 'observing of signs' and 'granting of seasons' by ancient sage kings; and the other two, redolent of modernity, involve the pursuit of 'accuracy' and historical 'accumulation' to this end. Juxtaposing legend with the messy realities of practice, Morgan reveals how such narratives were told, imagined, and re-imagined in response to evolving tensions. He argues that, whether or not 'empiricism' and 'progress' are real, we must consider the real effects of such narratives as believed in and acted upon in the history of astronomy in China.
Astride Two Worlds
by Barton C. HackerBy the middle of the nineteenth century, industrialization and military-technological innovation were beginning to alter drastically the character and conditions of warfare as it had been conducted for centuries. Occurring in the midst of these far-reaching changes, the American Civil War can justly be labeled both the last great preindustrial war and the first major war of the industrial age. Industrial capacity attained new levels of military significance as transportation improved, but in this, as in many other respects, the Civil War was distinctly transitional. Smoothbore artillery still dominated the battlefield, horse-drawn wagons and pack mules still carried the main logistic burden, seamstresses still outnumbered sewing-machine operators. Astride Two Worlds addresses the various causes and consequences of technological change for the course and outcome of the American Civil War.
Astronaut Academy: Inquiry-Based Science Lessons for Advanced and Gifted Students in Grades 2-3
by Jason S. McIntoshThe word "astronaut" comes from the Greek words meaning "star sailor," and that is exactly what students will become in Astronaut Academy. This 30-lesson interdisciplinary science unit: Is designed to teach high-ability second and third graders how to think like real-world astronauts. Requires students to explore the far regions of the solar system. Was designed using the research-based Integrated Curriculum Model. Features challenging problem-based learning tasks and engaging resources. Includes detailed teacher instructions and suggestions for differentiation. In this unit, students study the concept of exploration, journey to each planet, and create their own space station, all while acquiring scientific knowledge and habits, including how to follow the scientific method and properly conduct research and experiments. Suggestions and guidance are included on how teachers can adjust the rigor of learning tasks based on students' interests and needs. Grades 2-3 Recipient of the 2020 NAGC Curriculum Award
Astronaut Academy: Re-entry (Astronaut Academy #2)
by Dave RomanBeautifully updated with fresh color, this new edition Astronaut Academy: Re-Entry is the adventurous second volume of the middle-grade graphic novel series from Dave Roman.Hakata Soy still has a lot to learn!It’s a new semester at Astronaut Academy and everyone is excited for the Fireballchampionship—especially Hakata’s cranky roommate, Tak Offsky. But lurking in the shadows is a shape-shifting, heart-stealing monster, and it might just knock the Fireball team out of the competition!Can Hakata and Tak put aside their differences, lead the team to victory, and save the lives of their classmates?
Astronaut Academy: Splashdown (Astronaut Academy #3)
by Dave RomanAstronaut Academy: Splashdown is the exciting third installment of the middle grade graphic novel series from author Dave Roman.Heroes like Hakata Soy don’t take vacation!It’s summer vacation for the students of Astronaut Academy, and Maribelle Mellonbelly is throwing the best party ever on Beach Planet? Yes! But tensions heat up fast when Hakata Soy’s arch rival, Rick Raven, arrives. And soon the whole planet is heating up—with a giant volcano threatening to blow its top!Unless they can work together save the planet, the students of Astronaut Academy will betoast. But can they put aside their differences in time to turn the tides?
Astronaut Academy: Zero Gravity (Astronaut Academy #1)
by Dave RomanBeautifully updated with fresh color, this new edition Astronaut Academy: Zero Gravity is the first volume of the middle-grade graphic novel series from Dave Roman.Hakata Soy’s past won’t stay in the past!This former space hero is doing his best to keep his head down at Astronaut Academy. Things aren’t going so great, though. The most popular girl in school has it in for him. His best friend won’t return his calls. And his new roommate is a complete jock who only cares about Fireball.Hakata just wants to make a fresh start. But how will he find time to study Anti-GravityGymnastics and Tactical Randomness when he’s got a robot doppelganger on its way to kill him?
Astronaut Annie
by Suzanne Slade Nicole TadgellBrightly List: Best Children's Books of March 2018 Annie’s joyful exuberance and her family’s whole-hearted support leave no doubt that her dream is within her grasp. This delightful story—with backmatter about women astronauts—encourages young readers to pursue their dreams and reach for the stars. Career Day is approaching, and Annie can’t wait to show her family what she’s planning to be when she grows up. But, she must keep it a secret until Friday! So curious family members each ask Annie for a clue. Convinced that she’ll be a news reporter like he once was, Grandpop gives her his old camera and notebook to use for her presentation. Grandma is sure Annie wants to be a champion baker like her, so she offers a mixing bowl and oven mitts to Annie. Hopeful she'll become the mountain climber he aspired to be, Dad gives Annie an old backpack. Mom presents Annie with a pair of high-top sneakers to pursue Mom's favorite sport in high school -- basketball. Grateful for each gift, Annie cleverly finds a way to use them all to create her Career Day costume. When the big day arrives, Annie finally reveals her out-of-this-world dream to everyone. Fountas & Pinnell Level M Selected for the Red Tricycle Ultimate Summer Reading List! http://redtri.com/summer-reading-list-amazon-kids-edition-tablet/slide/1
Astronaut Hayley's Brave Adventure
by Hayley ArceneauxAn imaginative, inspiring, and beautifully illustrated picture book from the youngest American to ever orbit the earth—cancer survivor Hayley Arceneaux—who learned that if we are willing to be scared and brave at the same time, extraordinary things are possible.A fantastic fictional space story inspired by the author's real-life experiences, Astronaut Hayley&’s Brave Adventure is the perfect book for young readers who have big dreams and even bigger hearts.Like every child, Hayley has to learn to be brave in ordinary ways, like facing the first day of school or trying a new sport. But when Hayley gets sick—really sick—she has to learn to be brave in not-so-ordinary ways. When Hayley is invited to become an astronaut and travel to outer space, she knows she is up for the challenge. But she'll need all her courage to handle what's in store!Astronaut Hayley&’s Brave Adventure will inspire children everywhere to reach for the stars, to aspire for the impossible, and to seek new friends and new adventures wherever they are! The perfect choice for parents looking for:• Books about space• Inspiring story books• Role model books for girls and boys
Astronaut Training
by Aneta CruzWhen Astrid's first space mission goes disastrously wrong, she realizes she needs a bit more training than she thought!Astrid is training to go to space! But as she builds her shuttle, cooks astronaut food, and practices floating in zero gravity, Dad tells Astrid that the ship's construction is too dangerous, she's too little to cook alone, and she's not allowed to flood the bathroom. That night, when Astrid dreams she's an astronaut, the challenges she encounters are overwhelming. Astrid realizes she isn't as ready as she thought. Back on Earth, Astrid turns to her loving and supportive Dad, who helps Astrid continue her astronaut training.
Astronautics: The Physics of Space Flight
by Ulrich WalterThis introductory text covers all the key concepts, relationships, and ideas behind spaceflight and is the perfect companion for students pursuing courses on or related to astronautics. As a crew member of the STS-55 Space Shuttle mission and a full professor of astronautics at the Technical University of Munich, Ulrich Walter is an acknowledged expert in the field. This book is based on his extensive teaching and work with students, and the text is backed up by numerous examples drawn from his own experience. With its end-of-chapter examples and problems, this work is suitable for graduate level or even undergraduate courses in spaceflight, as well as for professionals working in the space industry. This third edition includes substantial revisions of several sections to extend their coverage. These include both theoretical extensions such as the study of relative motion in near-circular orbits, and more practical matters such as additional details about jet-engine and general rocket performance. New sections address regularized equations of orbital motion and their algebraic solutions and also state vector propagation; two new chapters are devoted to orbit geometry and orbit determination and to thermal radiation physics and modelling.
Astronautics: The Physics of Space Flight
by Ulrich WalterThis book covers all the key concepts, relationships, and ideas behind spaceflight and is the perfect companion for students pursuing courses on, or related to, astronautics. As a crew member of the STS-55 Space Shuttle mission and a full professor of astronautics at the Technical University of Munich, Ulrich Walter is an acknowledged expert in the field. This book is based on his extensive teaching and work with students, and the text is backed up by numerous examples drawn from his own experience. With its end-of-chapter examples and problems, this book is suitable for graduate level or even undergraduate courses in spaceflight, as well as for professionals working in the space industry. This fourth edition includes substantial revisions of many sections to extend their coverage. These include an overview of the different approaches to solving Newton’s gravitational equation of motion, a concise and newly structured coverage of orbital maneuvering, an enlarged and improved sectionabout the sphere of influence, a new section about hierarchical three-body systems, major enlargements in space reference frames and orbit geometry, and a new section about the earth reference ellipsoid.
Astronauts
by Amy LevinPhonics Readers is a recognized leader in helping you teach phonics and phonemic awareness, within the context of content-area reading. Content area focus: Space Explorers Phonics Skills: long o (o, oa, oe, ow), soft c
Astronauts (Rookie Read-About Science)
by Carmen Bredeson"Introduces the work of astronauts, including special jobs they might have on the space shuttle and experiments they might perform in space. Includes index." Other books in this series are available in this library.
Astronavigation: A Method for Determining Exact Position by the Stars
by K. A. ZischkaThis book acts as a manual for the ancient methods of navigating by the stars, which continue to provide the sailor or pilot with a timeless means of determining location. Despite the prevalence of GPS, a comprehensive set of formulae that can be evaluated on any inexpensive scientific calculator in the event of a catastrophic software or systems failure is a vital failsafe. It also serves as a living link to centuries of explorers from centuries past. Beginning with the basics of positional astronomy, this guide moves on to the more complex math necessary to understand the ephemerides, tables showing the future positions of the stars and planets. These astronomical almanacs were the satellite navigation of their day. The objective of this book is twofold: to provide the reader with a concise, comprehensible manual on positional astronomy as it applies to astro-navigation and to furnish the concise algorithms for finding the position of the Sun and various navigational stars at any given instant. In a world where too many mariners and aeronauts rely solely on technology and are vulnerable to solar flares, electrical issues, and the like, this knowledge can be a life-saving backup, not to mention a fascinating study in its own rights. Included is an exact mathematical way to determine your position in the air or on the sea far more quickly and accurately than by using the old celestial navigational method, without even needing to know or understand the underlying mathematics. There is even a section that teaches how to measure the azimuth of a star using an analog wrist watch so if a sextant gets damaged, locating position is still possible. This book offers mathematicians and adventurers a way to determine position when the skies go dark. The U. S. Navy has recently realized that their electronic navigation systems are vulnerable to cyberattack, and as a result has instructed the Naval Academy to begin teaching celestial navigation again.
Astronomical Photometry: Past, Present, and Future (Astrophysics and Space Science Library #373)
by Eugene F. Milone C. SterkenThis book will bring together experts in the field of astronomical photometry to discuss how their subfields provide the precision and accuracy in astronomical energy flux measurements that are needed to permit tests of astrophysical theories. Differential photometers and photometry, improvements in infrared precision, the improvements in precision and accuracy of CCD photometry, the absolute calibration of flux, the development of the Johnson UBVRI photometric system and other passband systems to measure and precisely classify specific types of stars and astrophysical quantities, and the current capabilities of spectrophotometry, and polarimetry to provide precise and accurate data, will all be discussed in this volume. The discussion of `differential' or `two-star' photometers will include those developed for planetary as well as stellar photometry and will range from the Princeton polarizing photometer through the pioneering work of Walraven to the differential photometers designed to measure the ashen light of Venus and to counter the effects of aurorae at high latitude sites; the last to be discussed will be the Rapid Alternate Detection System (RADS) developed at the University of Calgary in the 1980s.
Astronomical Spectroscopy for Amateurs (The Patrick Moore Practical Astronomy Series)
by Ken M. HarrisonAstronomical Spectroscopy for Amateurs is a complete guide for amateur astronomers who are looking for a new challenge. After a brief overview of the development of spectroscopes and an introduction to the theory of stellar spectra, the book goes on to examine the various types of spectroscopes available to amateurs. Next, practical sections address all aspects of setting-up and using various types of commercially-available and home-built spectroscopes. A final part gives detailed instructions for the design and construction of three different spectroscopes, along with the necessary design theory (minimal math). The home-made spectroscopes have performance capabilities near or equal to commercial units but are constructed using basic hand tools for a fraction of the cost! This up-to-date practical spectroscopy book will enable amateur astronomers to develop the skills and equipment needed to prepare scientifically acceptable spectra data, and to make a valuable contribution to ProAm projects.
Astronomical!: An Awesome Encounter with the Wonders of the Universe
by DKAn awesome encounter with the wonders of the Universe.Behold a cosmic treasure trove of spectacular photographs that captures space as you've never seen it before in this space book for children aged 9+.Mind-blowing new images made possible by the latest technology can now take us to the heart of the Universe–from swirling dust devils on Mars, to emerging stars in nebulas, supermassive storms on Jupiter, as well as galaxies, comets, asteroids, and much more.This space book for children offers: Fast facts and amazing stats that highlight the mind-blowing wonders of the Solar System and the Universe.A collection of spectacular images captured by the latest space telescope, the James Webb, as well as mesmerizing images from Hubble and other spacecraft.Content endorsed and authenticated by Smithsonian.Astronomical! is the perfect gift to inspire young stargazers and astronomers. Every double page features a magnificent celestial body alongside fascinating and informative text that brings to life the wonder of outer space. Additional facts and comparisons provide readers with key information at a glance.
Astronomy & Space: From the Big Bang to the Big Crunch (Volume 3, Q-Z)
by Phillis EngelbertFeatures include approximately 300 entries; approximately 240 illustrations; sidebars; a historical timeline of famous astronomers, events and discoveries; glossary of terms; and a cumulative index.
Astronomy Book (The Everything Kids')
by Kathi Wagner Sheryl RacineExplore the galaxies!Aliens, space ships, and constellations, oh my! Ride on a rocket ship to another galaxy with this stellar book. With The Everything Kids' Astronomy Book, astronomers-in-training will learn:How galaxies like the Milky Way were built.Why the sun's surface is 20,000-50,000-degrees Fahrenheit.Why the earth spins and how gravity works.What comets and asteroids are made of and how they affect planets.The truth about the man in the moon.Why Mars is so hot and what those rings around Saturn are.What scientists think about aliens and life in outer spaceIf you want to build a sky-watching kit or change your room into a small universe, this book will take you on a journey that is out-of-this-world!
Astronomy at High Angular Resolution: A Compendium of Techniques in the Visible and Near-Infrared (Astrophysics and Space Science Library #439)
by Henri M. J. Boffin Gaitee Hussain Jean-Philippe Berger Linda SchmidtobreickThis book offers an essential compendium of astronomical high-resolution techniques. Recent years have seen considerable developments in such techniques, which are critical to advances in many areas of astronomy. As reflected in the book, these techniques can be divided into direct methods, interferometry, and reconstruction methods, and can be applied to a huge variety of astrophysical systems, ranging from planets, single stars and binaries to active galactic nuclei, providing angular resolution in the micro- to tens of milliarcsecond scales. Written by experts in their fields, the chapters cover adaptive optics, aperture masking imaging, spectra disentangling, interferometry, lucky imaging, Roche tomography, imaging with interferometry, interferometry of AGN, AGN reverberation mapping, Doppler- and magnetic imaging of stellar surfaces, Doppler tomography, eclipse mapping, Stokes imaging, and stellar tomography. This book is intended to enable a next generation of astronomers to apply high-resolution techniques. It informs readers on how to achieve the best angular resolution in the visible and near-infrared regimes from diffraction-limited to micro-arcsecond scales.