Countdown Or Count Down

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Count Down

An award-winning scientist, in this urgent, thought-provoking and meticulously researched book, shows how chemicals in the modern environment are changing--and endangering--human sexuality and fertility on the grandest scale.
Pumpkin Countdown

Author: Joan Holub
language: en
Publisher: Albert Whitman & Company
Release Date: 2012-07-01
Best Children's Books of the Year 2013, Bank Street College American Association of University Women Award for Juvenile Literature, 2013 Nominee A fun trip to the pumpkin patch that includes counting, grouping, and more. Fall has come, and what better way to celebrate than a field trip to the pumpkin patch! From 20 name tags on coats all the way down to 1 last pumpkin song, the class counts everything in sight! Follow along in this sweet, rhyming picture book, with interactive counting on each spread. Count the 8 orange pumpkins, tall, 7 yellow pumpkins, bumpy, and much more! Including autumnal illustrations and pumpkin facts, this book is perfect for the fall season and an extra fun way to teach children to count backward from twenty.
Mastering Concurrency in Python

Immerse yourself in the world of Python concurrency and tackle the most complex concurrent programming problems Key FeaturesExplore the core syntaxes, language features and modern patterns of concurrency in PythonUnderstand how to use concurrency to keep data consistent and applications responsiveUtilize application scaffolding to design highly-scalable programs Book Description Python is one of the most popular programming languages, with numerous libraries and frameworks that facilitate high-performance computing. Concurrency and parallelism in Python are essential when it comes to multiprocessing and multithreading; they behave differently, but their common aim is to reduce the execution time. This book serves as a comprehensive introduction to various advanced concepts in concurrent engineering and programming. Mastering Concurrency in Python starts by introducing the concepts and principles in concurrency, right from Amdahl's Law to multithreading programming, followed by elucidating multiprocessing programming, web scraping, and asynchronous I/O, together with common problems that engineers and programmers face in concurrent programming. Next, the book covers a number of advanced concepts in Python concurrency and how they interact with the Python ecosystem, including the Global Interpreter Lock (GIL). Finally, you'll learn how to solve real-world concurrency problems through examples. By the end of the book, you will have gained extensive theoretical knowledge of concurrency and the ways in which concurrency is supported by the Python language What you will learnExplore the concepts of concurrency in programmingExplore the core syntax and features that enable concurrency in PythonUnderstand the correct way to implement concurrencyAbstract methods to keep the data consistent in your programAnalyze problems commonly faced in concurrent programmingUse application scaffolding to design highly-scalable programsWho this book is for This book is for developers who wish to build high-performance applications and learn about signle-core, multicore programming or distributed concurrency. Some experience with Python programming language is assumed.