"Our understanding of how the human brain performs mathematical calculations is far from complete. In The Number Sense, Stanislas Dehaene offers readers an enlightening exploration of the mathematical mind. Using research showing that human infants have a rudimentary number sense, Dehaene suggests that this sense is as basic as our perception of color, and that it is wired into the brain. But how then did we leap from this basic number ability to trigonometry, calculus, and beyond? Dehaene shows that it was the invention of symbolic systems of numerals that started us on the climb to higher mathematics. Tracing the history of numbers, we learn that in early times, people indicated numbers by pointing to part of their bodies, and how Roman numerals were replaced by modern numbers. On the way, we also discover many fascinating facts: for example, because Chinese names for numbers are short, Chinese people can remember up to nine or ten digits at a time, while English-speaking people can only remember seven. A fascinating look at the crossroads where numbers and neurons intersect, The Number Sense offers an intriguing tour of how the structure of the brain shapes our mathematical abilities, and how math can open up a window on the human mind"--Provided by publisher.
RIPPLE Grab this GREAT physical book now at a limited time discounted price! Ripple refers to both the cryptocurrency XRP, as well as its digital payment protocol which is being used by various banks and institutions all over the world. To understand the world of Ripple and what sets it apart from the rest, you will first need to understand the basic workings of the system itself.In reality, Ripple has become more known for its payment solution and technology than for its cryptocurrency. This is because within the Ripple system, money can be transferred in whatever form the users prefer. The system allows transactions in US dollar, Euro, Yen, Pound, Bitcoin, Ether, Litecoin, or XRP. This open source platform makes Ripple easy to integrate into various other existing infrastructure and protocols, which is an advantage for both Ripple and its community of users. The Ripple system operates in a very close system of trust between different parties, and there is also a system of debt or credit lines involved in the process. To simplify the process, the sender will log on to his Ripple gateway (conduit or agent), deposits the money into this Ripple gateway, and sends the instruction for the funds to be released to the receiver. The receiver will receive the funds by logging on to his preferred receiver. In this Ripple payment protocol, the transfers are not limited to money. Cryptocurrencies can be sent as long as the gateways are able to transact in them. Gold and other precious materials may also be transacted. The important thing is to find gateways that are willing and able to perform the transaction. Suppose, for instance, that the sender wants to send $1000 to the receiver, but the sender's own gateway does not have a direct trust relationship with the receiver's gateway. What the Ripple algorithm will attempt to do is to find a chain, or several intermediary gateways which can act as the conduit for the transaction to go through. Ripple's protocol will try to find the shortest and quickest link between gateways in order to process the transaction. Now, what if the Ripple network has attempted to find a chain of trust between two different gateways to process a transfer, but cannot locate a chain? This is where the Ripple cryptocurrency or XRP comes into play. XRP may be used within the Ripple network to convert money or goods being transferred. All currencies and goods will have an XRP price, and the sender can then choose to convert to XRP, send the XRP through the chain, to get to the receiver. The receiver, meanwhile, can opt to convert the XRP back to the original currency from his own gateway.In the Ripple network, users are transacting currencies, commodities, and other units of value seamlessly. Chris Larsen, one of the co-founders of Ripple Labs and who also has extensive experience in digital finance (having founded e-Loan and Prosper), referred to the Ripple protocol as "HTTP for money". Larsen likens Ripple to gold as a standard of currency, because gold requires liquidity, trust, and utility to become a standard. "It's analogous to the Bitcoin networks. Any user can use the protocol just like they would HTTP. You can build on top of it without licensing it from anybody,"...... Here Is What You'll Learn About... History Of Ripple How Does Ripple Work? Ripple And Other Cryptocurrencies Investing In Ripple Areas Of Concern For Ripple Current Happenings In Ripple The Future Of Cryptocurrency Advice For Investing In Ripple Much, much more! Order your copy of this fantastic book today!
Learn to work with XRP and build applications on Ripple's blockchain Key FeaturesLearn to use Ripple’s decentralized system for transfering digital assets globallyA simpilfied and shortened learning curve to understand the Ripple innovation and BlockchainTakes a hands-on approach to work with XRP – Ripple’s native currencyBook Description This book starts by giving you an understanding of the basics of blockchain and the Ripple protocol. You will then get some hands-on experience of working with XRP. You will learn how to set up a Ripple wallet and see how seamlessly you can transfer money abroad. You will learn about different types of wallets through which you can store and transact XRP, along with the security precautions you need to take to keep your money safe. Since Ripple is currency agnostic, it can enable the transfer of value in USD, EUR, and any other currency. You can even transfer digital assets using Ripple. You will see how you can pay an international merchant with their own native currency and how Ripple can exchange it on the fly. Once you understand the applications of Ripple, you will learn how to create a conditionally-held escrow using the Ripple API, and how to send and cash checks. Finally, you will also understand the common misconceptions people have about Ripple and discover the potential risks you must consider before making investment decisions. By the end of this book, you will have a solid foundation for working with Ripple's blockchain. Using it, you will be able to solve problems caused by traditional systems in your respective industry. What you will learnUnderstand the fundamentals of blockchain and RippleLearn how to choose a Ripple walletSet up a Ripple wallet to send and receive XRPLearn how to protect your XRPUnderstand the applications of RippleLearn how to work with the Ripple APILearn how to build applications on check and escrow features of RippleWho this book is for This book is for anyone interested in getting their hands on Ripple technology and learn where it can be used to gain competitive advantages in their respective fields. For most parts of the book, you need not have any pre-requisite knowledge. However, you need to have basic background of JavaScript to write an escrow.
"By hook or by bishop's crook, Ventianus will see him dead by nightfall." While Cuthbert and Eadmund pursue a thief through the deserted streets of an enemy city, others plot to turn their help into harm and their honour into shame. Outwitted and outnumbered, they stumble into a nest of conspiracies that may send Britain crashing back into the bloodshed and chaos from which it just emerged. But Eadmund has more in the game than Cuthbert knows, and deciding who to trust may become the most dangerous choice of all.Every treasure has a secret, every saint has a past.
Learn to use PowerShell, Microsoft's scripting language, to automate real-world tasks that IT professionals and system administrators deal with every day. Save Time. Automate. PowerShell® is both a scripting language and an administrative shell that lets you control and automate nearly every aspect of IT. In PowerShell for Sysadmins, five-time Microsoft® MVP "Adam the Automator" Bertram shows you how to use PowerShell to manage and automate your desktop and server environments so that you can head out for an early lunch. You'll learn how to: Combine commands, control flow, handle errors, write scripts, run scripts remotely, and test scripts with the PowerShell testing framework, Pester Parse structured data like XML and JSON, work with common domains (like Active Directory, Azure, and Amazon Web Services), and create a real-world server inventory script Design and build a PowerShell module to demonstrate PowerShell isn't just about ad-hoc scripts Use PowerShell to create a hands-off, completely automated Windows deployment Build an entire Active Directory forest from nothing but a Hyper-V host and a few ISO files Create endless Web and SQL servers with just a few lines of code! Real-world examples throughout help bridge the gap between theory and actual system, and the author's anecdotes keep things lively. Stop with the expensive software and fancy consultants. Learn how to manage your own environment with PowerShell for Sysadmins and make everyone happy. Covers Windows PowerShell v5.1
With 28 new chapters, the third edition of The Practice of System and Network Administration innovates yet again! Revised with thousands of updates and clarifications based on reader feedback, this new edition also incorporates DevOps strategies even for non-DevOps environments. Whether you use Linux, Unix, or Windows, this new edition describes the essential practices previously handed down only from mentor to protégé. This wonderfully lucid, often funny cornucopia of information introduces beginners to advanced frameworks valuable for their entire career, yet is structured to help even experts through difficult projects. Other books tell you what commands to type. This book teaches you the cross-platform strategies that are timeless! DevOps techniques: Apply DevOps principles to enterprise IT infrastructure, even in environments without developers Game-changing strategies: New ways to deliver results faster with less stress Fleet management: A comprehensive guide to managing your fleet of desktops, laptops, servers and mobile devices Service management: How to design, launch, upgrade and migrate services Measurable improvement: Assess your operational effectiveness; a forty-page, pain-free assessment system you can start using today to raise the quality of all services Design guides: Best practices for networks, data centers, email, storage, monitoring, backups and more Management skills: Organization design, communication, negotiation, ethics, hiring and firing, and more Have you ever had any of these problems? Have you been surprised to discover your backup tapes are blank? Ever spent a year launching a new service only to be told the users hate it? Do you have more incoming support requests than you can handle? Do you spend more time fixing problems than building the next awesome thing? Have you suffered from a botched migration of thousands of users to a new service? Does your company rely on a computer that, if it died, can’t be rebuilt? Is your network a fragile mess that breaks any time you try to improve it? Is there a periodic “hell month” that happens twice a year? Twelve times a year? Do you find out about problems when your users call you to complain? Does your corporate “Change Review Board” terrify you? Does each division of your company have their own broken way of doing things? Do you fear that automation will replace you, or break more than it fixes? Are you underpaid and overworked? No vague “management speak” or empty platitudes. This comprehensive guide provides real solutions that prevent these problems and more!
Polytechnic University, the second oldest private engineering and science institution in the United States, has for over 150 years provided the academic crucible and talent to advance the principles and frontiers of engineering and technology which have improved the lives of the vast majority of the world's inhabitants. Its students and professors have been honored for groundbreaking discoveries in numerous areas, including microwave technology, aeronautics, barcode technology, polymer science, and telecommunications. Noted author Jeffrey L. Rodengen details the rich and colorful history of this distinguished institution, ranked in the top 10 percent of all U.S. colleges and universities by The Princeton Review. Foreword by Wm. A. Wulf, PhD, president of the National Academy of Engineering.
Understand the concepts, processes and technologies that will aid in your professional development as a new system administrator. While every information technology culture is specific to its parent organization, there are commonalities that apply to all organizations. The Accidental SysAdmin Handbook, Second Edition looks at those commonalities and provides a general introduction to critical aspects associated with system administration. It further acts to provide definitions and patterns for common computer terms and acronyms. What You Will Learn Build and manage home networking and plan more complex network environments Manage the network layer and service architectures as well as network support plans Develop a server hardware strategy and understand the physical vs. virtual server ecosystem Handle data storage, data strategies and directory services, and central account management Work with DNS, DHCP, IP v4 and IP v6 Deploy workstations and printers Manage and use antivirus and security management software Build, manage and work with intranets and Internet support services Who This Book Is For It is assumed that the reader has little to no experience in a professional information technology environment.
One night, teacher, counselor and public servant Jim Walden was awakened by a red-eyed alien creature at the foot of his bed. The encounter launched him on a search for answers. Here, Jim shares his experiences, discoveries, and astounding conclusion that aliens are our own ancestors living in an alternate dimension, working to preserve the planet.
