Topologia Da Wikipedia, l'enciclopedia libera. Storia[modifica | modifica wikitesto] I sette ponti di Königsberg, uno dei primi problemi topologici L'antenata della topologia è la geometria antica. Georg Cantor, l'inventore della teoria degli insiemi, iniziò a studiare la teoria degli insiemi di punti nello spazio euclideo verso la fine del XIX secolo. Maurice Fréchet, unificando il lavoro sugli spazi di funzioni di Cantor, Vito Volterra, Arzelà, Hadamard, Ascoli e altri, nel 1906 introdusse il concetto di spazio metrico[3]. Nel 1914 Felix Hausdorff, generalizzando la nozione di spazio metrico, coniò il termine di spazio topologico e definì quello che oggi è detto spazio di Hausdorff[4]. Finalmente, nel 1922 Kuratovskij, con una ulteriore lieve generalizzazione, fornì il concetto odierno di spazio topologico. Introduzione elementare[modifica | modifica wikitesto] Un semplice esercizio introduttivo consiste nel classificare le lettere maiuscole dell'alfabeto per classi di equivalenza topologica. ), dove e
The Educator’s Guide to Copyright, Fair Use, and Creative Commons Lately, we’ve been hearing more and more about digital copyrights and fair use in the news and online – particularly with the whole SOPA/PIPA uproar that recently swept the web. Also, we on the Edublogs support team have been getting more and more complaints and official requests to remove copyrighted content that users have placed on blogs. The legal jargon with respect to digital copyrights can be confusing – especially since different countries have their own laws and regulations. With this post, we hope to dispel a few myths and pull together a complete list of resources for teachers and students to use when blogging and working with content online. Rule #1: You Can’t Use Everything You Find On the Web Dexter the cat hates those that steal his photos… This may seem obvious, but judging by the notices we have received, many teachers (and especially students) are under the impression that if it is on the web, then it is up for grabs. Rule #2: There Are Resources You CAN Use Images Videos
Future-proofing needs collaboration, innovation, education and inspiration | Guardian Sustainable Business Make no mistake, the transformation from a firm of the past to a firm of the future is challenging, especially while operating amid of a perfect storm of social, economic and environmental volatility. Successful transformation requires courage, not fear. The more we understand and explore our own business environments and wider business ecosystems (as well as our own inner motives and values) the more we find pathways for success – learning through doing, growth through experience, success through failure. Looking around us in nature and human nature, we find enablers to assist us; catalysts which aid and optimise the transformational journey. Four primary catalysts for transformation are: collaboration, innovation, education and inspiration. Let's explore each in turn: Collaboration There has been much written recently about collaboration and co-operation. Martin Nowak with Roger Highfield, Super Co-operators. Innovation Education Inspiration We are entering uncharted waters.
computer science A program to strengthen and diversify the IT pipeline though outreach to middle schools. Using the box, IT professionals customize and deliver a classroom presentation and engage youth in hands-on activities that inspire and inform them about opportunities in IT. Are you ready to meet and inspire the next generation of computing innovators? We've made it easy for you to help introduce middle-school students to the world of computing. NCWIT thanks the following people for their contributions to Outreach-in-a-Box: Discovering IT; Chris Stephenson, Computer Science Teachers Association (CSTA); Holly Yanco and Fred Martin, University of Massachusetts at Lowell; Mike Eisenberg and Leah Buechley, University of Colorado at Boulder; and Jane Krauss, Education Consultant.
7 Questions to Assess Your Business Model Design Ultimately, customers are the only relevant judges of your business model. However, even before you test your model in the market, you can assess its design with 7 questions that go well beyond the conventional focus on products and market segments. First things first. In order to assess your business model you should sketch it out on the Business Model Canvas outlined in the video below. Every business model has a product and/or service at its center that focuses on a customer’s job-to-be-done. First, ask yourself how well your Value Proposition is getting your target customer’s job done. That’s it as to the basics. 1. The time, effort, or budget a customer has to spend to switch from one product or service provider to another is called “switching costs”. A great example of designing switching costs into a business model is Apple’s introduction of the iPod in 2001. 2. Scalability describes how easy it is to expand a business model without equally increasing its cost base. 3. 4. 5. 6.
Free Technology for Teachers The nature of technology: what it is ... - Google Libri The Teacher Tap: Professional Development Resources for Educators The Teacher Tap is a free, professional development resource that helps educators and librarians address common questions about the use of technology in teaching and learning by providing easy access to practical, online resources and activities. Check out the Project Overview for more information. For a more indepth look at these topics, go to our online courses including: We're in the process of updating this resource, so you'll find a mixture of old and new pages.
eduMOOC: Online Learning Today... and Tomorrow Program and Resources Expanding Daily!Visit Often for Updates! The gadget spec URL could not be found The Center for Online Learning, Research and Service at the University of Illinois Springfield welcomes you to a Massive Open Online Class (MOOC) on “Online Learning Today...and Tomorrow.” It will continue through August 19. It is totally open, free, and collaborative. You are invited to register (see right column) with only your name and email address so you can be given access to all materials, panels and discussions. Enrollment Update! We are elated to see enormous interest in this topic! We will add all who register to the Google Group in daily uploads. Some Media Mentions elarnspace blog by George Siemens: eduMOOC News by myweb2learn Columbia Teacher's College blog edLab: OLLI Online - University of Virginia Eagle Dawg Blog Views, dreams & creative writings, Anil Prasad CollabOERate Blog, Wayne Mackintosh adVancEducation Decision Doc UIC News Techknow Tools Learner Weblog eduMOOC 4 All Wikis
Classroom 2.0 Theosophy article: "The Life Principle" by Blavatsky A FEW years back a very interesting controversy raged between several scientists of reputation. Some of these held that spontaneous generation was a fact in nature, whilst others proved the contrary; to the effect that, as far as experiments went, there was found to be biogenesis, or generation of life from previously existing life, and never the production of any form of life from non-living matter. An erroneous assumption was made in the first instance that heat, equal to the boiling point of water, destroyed all life organisms; but by taking hermetically sealed vessels containing infusions, and subjecting them to such or a greater degree of heat, it was shown that living organisms did appear even after the application of so much heat. Along with the fact of biogenesis, we must note, however, Mr. Tracing life downwards we ultimately reach "protoplasm," called by Huxley "the physical basis of life," a colourless, jelly-like substance, absolutely homogeneous without parts or structure.
The Trusted Leader in HTML5 Document Viewing | Crocodoc Interact with your documents Crocodoc comes with a robust set of commenting and markup tools that enable interactive document workflows. These include: commenting tools, drawing tools, highlighting tools, textbox tools, and strikethrough tools. When enabled, Crocodoc's commenting and markup tools allow your users to: Collaboratively add and reply to comments on shared documents Take notes when collecting research Fill out forms and submit requested paperwork Send colleagues feedback on presentations Comprehensive API Our comprehensive API allows you to implement custom collaboration workflows by customizing the behavior of our built-in tools. Pass names to Crocodoc so they show up when comments are created Specify which annotations are visible when a document is viewed Receive real-time notifications when annotations are created Set per-user permissions when viewing, creating, or deleting annotations Download annotated PDF copies of any document Sample document
John David Barrow Da Wikipedia, l'enciclopedia libera. John David Barrow (Londra, 29 novembre 1952) è un cosmologo inglese, professore di matematica all'Università di Cambridge. Biografia[modifica | modifica sorgente] Nel 2006 è stato insignito del Premio Templeton per "i suoi scritti sulla relazione tra la vita e l'universo, e sulla natura della consapevolezza umana [che] ha prodotto nuove prospettive sulle questioni centrali riguardo alla scienza e alla religione". Per il teatro ha scritto lo spettacolo Infinities (2002) che ha esordito al Teatro Piccolo di Milano, poi a Valencia, conseguendo il Premio teatrale Ubu 2002 come spettacolo dell'anno. Opere principali[modifica | modifica sorgente] La mano sinistra della creazione (con Joseph Silk) - Mondadori, 1985Il mondo dentro il mondo - Adelphi, 1991Teorie del Tutto. Voci correlate[modifica | modifica sorgente] Altri progetti[modifica | modifica sorgente] Collegamenti esterni[modifica | modifica sorgente] (EN) Pagina personale di John D.
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