Islamic Golden Age History of the concept There is no unambiguous definition of term, and depending on whether it is used with a focus on cultural or on military achievement, it may be taken to refer to rather disparate time spans. Thus, one author would have it extend to the duration of the caliphate, or to "six and a half centuries", while another would have it end after only a few decades of Rashidun conquests, with the death of Umar and the First Fitna. During the early 20th century, the term was used only occasionally, and often referred to the early military successes of the Rashidun caliphs. Causes When the multiverse and many-worlds collide - physics-math - 01 June 2011 Read full article Continue reading page |1|2 Editorial: "God deserves a cosmological explanation" TWO of the strangest ideas in modern physics - that the cosmos constantly splits into parallel universes in which every conceivable outcome of every event happens, and the notion that our universe is part of a larger multiverse - have been unified into a single theory.
How to Be Startup CEO - The Startup Guide - Building a Better World Through Entrepreneurship The iContact Team in October 2011 By Ryan Allis Being the CEO of a startup is one of the most challenging roles out there. Your job is to build a product customers love; recruit a team; find funding from customers, partners, or investors; and guide the overall prioritization of work. In my experience the three most important components of the Start-up CEO’s role are: How to Learn (But Not Master) Any Language in 1 Hour (Plus: A Favor) Deconstructing Arabic in 45 Minutes Conversational Russian in 60 minutes? This post is by request. How long does it take to learn Chinese or Japanese vs. Spanish or Irish Gaelic?
Wormholes and Donut Holes I’ve heard people claim that in order to understand wormholes, you need to understand five-dimensional space. Well that’s just silly. A wormhole is often described as a hole in space-time. It can be imagined as a black hole where instead of getting crushed when you fall in to the center, you emerge somewhere else (or even some-when else: wormholes are possibly the only way to get time travel). They’re a staple of science fiction, even if they aren’t always portrayed accurately. Probably not what a wormhole looks like
The British Library Puts 1,000,000 Images into the Public Domain, Making Them Free to Reuse & Remix Earlier this week, Oxford’s Bodleian Library announced that it had digitized a 550 year old copy of the Gutenberg Bible along with a number of other ancient bibles, some of them quite beautiful. Not to be outdone, the British Library came out with its own announcement on Thursday: We have released over a million images onto Flickr Commons for anyone to use, remix and repurpose. These images were taken from the pages of 17th, 18th and 19th century books digitised by Microsoft who then generously gifted the scanned images to us, allowing us to release them back into the Public Domain. The images themselves cover a startling mix of subjects: There are maps, geological diagrams, beautiful illustrations, comical satire, illuminated and decorative letters, colourful illustrations, landscapes, wall-paintings and so much more that even we are not aware of.
Finally! An Easy Way To Know When (And How) To Use A Semicolon! – The Writer's Circle Semicolons are tricky. We all know what they are, how to read them, and when they’re used incorrectly. But if you’re anything like us, it’s hard to know how to use them effectively. The semicolon isn’t all that scary! Actually, it can help give your writing new life and vigor. It can structure your writing to match dialect. Overview of learning styles Many people recognize that each person prefers different learning styles and techniques. Learning styles group common ways that people learn. Everyone has a mix of learning styles. Some people may find that they have a dominant style of learning, with far less use of the other styles. Others may find that they use different styles in different circumstances.