# Graph theory, graph practice

Diagramming Components for HTML5/Canvas, by Northwoods Software® GoJS is a feature-rich JavaScript library for implementing interactive diagrams across modern web browsers and platforms.

GoJS makes constructing diagrams of complex nodes, links, and groups easy with customizable templates and layouts. GoJS offers many advanced features for user interactivity such as drag-and-drop, copy-and-paste, in-place text editing, templates, data binding and models, transactional state and undo management, palettes, overviews, event handlers, commands, and an extensible tool system for custom operations. GoJS is pure JavaScript, so users get interactivity without requiring round-trips to servers and without plugins. GoJS normally runs completely in the browser, rendering to an HTML5 Canvas element or SVG without any server-side requirements.

GoJS does not depend on any JavaScript libraries or frameworks, so it should work with any HTML or JavaScript framework or with no framework at all. Perception. Graph. Graph Description In mathematics and computer science, graph theory studies networks of connected nodes and their properties.

A graph can be used to visualize related data, or to find the shortest path from one node to another node for example. Central concepts in graph theory are: Node: a block of information in the network.Edge: a connection between two nodes (can have a direction and a weight).Centrality: determining the relative importance of a node.Clustering: partitioning nodes into groups. Introduction to Social Network Methods: Table of Contents.

Robert A.

Hanneman and Mark Riddle Introduction to social network methods Table of contents. Welcome to graph-tool’s documentation! — graph-tool 2.2.29.1 documentation. Overview of Bulbs, a Python Framework for Graph Databases like Neo4j. A Python framework for graph databases. Bulbs is an open-source Python persistence framework for graph databases and the first piece of a larger Web-development toolkit that will be released in the upcoming weeks. It’s like an ORM for graphs, but instead of SQL, you use the graph-traveral language Gremlin to query the database. Bulbs supports pluggable backends, and you can use it to connect to either Neo4j Server or Rexster. Neo4j Server is Neo4j‘s official server. 5 Graph Databases to Consider. Of the major categories of NoSQL databases - document-oriented databases, key-value stores and graph databases - we've given the least attention to graph databases on this blog.

That's a shame, because as many have pointed out it may become the most significant category. Graph databases apply graph theory to the storage of information about the relationships between entries. Raph Visualization – Unpicking the Hairball - Joe Parry @ GraphConn... National Resource for Network Biology. Protein–Protein Interactions Essentials: Key Concepts to Building and Analyzing Interactome Networks. Interactome. Part of the DISC1 interactome with genes represented by text in boxes and interactions noted by lines between the genes.

From Hennah and Porteous, 2009.[1] The word "interactome" was originally coined in 1999 by a group of French scientists headed by Bernard Jacq.[2] Though interactomes may be described as biological networks, they should not be confused with other networks such as neural networks or food webs. Molecular interaction networks Molecular interactions can occur between molecules belonging to different biochemical families (proteins, nucleic acids, lipids, carbohydrates, etc.) and also within a given family. Whenever such molecules are connected by physical interactions, they form molecular interaction networks that are generally classified by the nature of the compounds involved. Applying Graph Theory and Network Science. Labeled.png (PNG Image, 1280 × 892 pixels) - Scaled (79%) Mark Newman: Publications. Memoirs of a Graph Addict: Despair to Redemption. Six Degrees of Wikipedia. Six Degrees of Wikipedia is a Harvard CS205 class project aimed at analyzing and understanding the structure of the English Wikipedia .

The project was inspired by similar projects such as the Oracle of Bacon (which modeled the popular trivia game Six Degrees of Kevin Bacon ), Microsoft Academic Map (which visualized the concept of Erdos numbers ) and a 2008 version of Six Degrees of Wikipedia . Similar to these projects, our analysis goes beyond exploring the Six Degrees of Separation concept and attempts to provide insights into the overall graph structure of Wikipedia. Graph structure in the web. Andrei Broder1, Ravi Kumar2, Farzin Maghoul1, Prabhakar Raghavan2, Sridhar Rajagopalan2, Raymie Stata3, Andrew Tomkins2, Janet Wiener3 1: AltaVista Company, San Mateo, CA. 2: IBM Almaden Research Center, San Jose, CA. 3: Compaq Systems Research Center, Palo Alto, CA.

Abstract The study of the web as a graph is not only fascinating in its own right, but also yields valuable insight into web algorithms for crawling, searching and community discovery, and the sociological phenomena which characterize its evolution. We report on experiments on local and global properties of the web graph using two Altavista crawls each with over 200 million pages and 1.5 billion links. Our study indicates that the macroscopic structure of the web is considerably more intricate than suggested by earlier experiments on a smaller scale. Graph-database.org. Overview — NetworkX. CCNR. Exploring complex networks : Article : Nature. Steven H.

Strogatz Networks are on our minds nowadays. Sometimes we fear their power — and with good reason. On 10 August 1996, a fault in two power lines in Oregon led, through a cascading series of failures, to blackouts in 11 US states and two Canadian provinces, leaving about 7 million customers without power for up to 16 hours1. The Love Bug worm, the worst computer attack to date, spread over the Internet on 4 May 2000 and inflicted billions of dollars of damage worldwide. In our lighter moments we play parlour games about connectivity. Meanwhile scientists have been thinking about networks too. Figure 1: Wiring diagrams for complex networks. Force-based algorithms (graph drawing) Visualization of links between pages on a wiki using a force-directed layout.

While graph drawing can be a difficult problem, force-directed algorithms, being physical simulations, usually require no special knowledge about graph theory such as planarity. Forces Complex networks and systems. 0303516v1.pdf (application/pdf Object) Getting Started with HtmlUnit. Introduction The dependencies page lists all the jars that you will need to have in your classpath.

The class com.gargoylesoftware.htmlunit.WebClient is the main starting point. This simulates a web browser and will be used to execute all of the tests. Most unit testing will be done within a framework like JUnit so all the examples here will assume that we are using that. In the first sample, we create the web client and have it load the homepage from the HtmlUnit website. Imitating a specific browser. WordNet. WordNet is a lexical database for the English language.[1] It groups English words into sets of synonyms called synsets, provides short, general definitions, and records the various semantic relations between these synonym sets.

The purpose is twofold: to produce a combination of dictionary and thesaurus that is more intuitively usable, and to support automatic text analysis and artificial intelligence applications. The database and software tools have been released under a BSD style license and can be downloaded and used freely. The database can also be browsed online. History and team members WordNet was created at the Cognitive Science Laboratory of Princeton University under the direction of psychology professor George Armitage Miller. Database contents Bplawler/crawler - GitHub. Degeneracy (graph theory) Ideas, issues, knowledge, data - visualized!