markorodriguez.com

gettingcirrius.com

Getting Cirrius: Calculating Similarity (Part 1): Cosine Similarity

http://www.gettingcirrius.com/2010/12/calculating-similarity-part-1-cosine.html

Meandering thoughts about technology and management. Sunday, December 5, 2010. Calculating Similarity (Part 1): Cosine Similarity. Dot Product, 2010). Cosine similarity is literally the angular difference between two vectors. Cosine Similarity is expressed by the formula:. Cosine Similarity, 2010). For those of you allergic that don't speak "mad mathematician" (like me), to calculate the cosine similarity, we need to:. Take the dot product of vectors A and B. Calculate the magnitude of Vector A. In the c...

maxdemarzi.com

Hubway Data Visualization Challenge with Neo4j | Max De Marzi

https://maxdemarzi.com/2012/10/11/hubway-data-visualization-challenge-with-neo4j

Ruby Graphs with Neo4j. Hubway Data Visualization Challenge with Neo4j. Dataset into a Neo4j graph database, and made it available for us to play with. The datamodel looks like this:. I took a quick stab at it using just the Stations. The following cypher query returns the top 200 end stations based on their starting point and ranks them by the number of trips taken between the stations. The count is later used to determine the width of the ribbons from one station to the other. In Downtown Boston on Sat...

tomondev.wordpress.com

Tomondev's Blog | Thomas Koeppen Blog | Page 2

https://tomondev.wordpress.com/page/2

Instant Google ABC – Germany 09.09.2010. Yesterday Google launched Instant Google. For logged in users. Google Instant ABC served on http:/ google.com. From Germany 09.09.2010. With one letter typed, first third results:. A: amazon; aol; att. B: best buy; bank of america; bing. C: craigslist; cnn; chase. D: dictionary; droid x; dominos. E: ebay; espn; expedia. F: facebook; facebook login; firefox. G: gmail; google maps; google.com. H: hotmail; hulu; home depot. I: ikea; imdb; itunes. U: usps; ups; utube;.

bulbflow.com

Overview of Bulbs, a Python Framework for Graph Databases like Neo4j | Bulbflow

http://bulbflow.com/overview

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. Neo4j Server is Neo4j. 8216;s official server. Rexster is TinkerPop. For tabular data, re...

thinkaurelius.wordpress.com

Team | Aurelius

https://thinkaurelius.wordpress.com/team

Applying Graph Theory and Network Science. Dr Marko A. Rodriguez. Has been developing commercial software in various forms for about fifteen years. Most of his work in those years has been connected with start-up companies in the healthcare space. He is a TinkerPop contributor and lead developer of the Rexster graph server. He received his Bachelors of Science in Management Information System and Decision Sciences from George Mason University. Started programming at the age of 11 using Assembler and C &#...

maxdemarzi.com

Cypher | Max De Marzi

https://maxdemarzi.com/category/cypher

Ruby Graphs with Neo4j. Continue reading →. As far as SSDs go. So definitely not a production grade server, so bear that in mind. Continue reading →. Importing the Hacker News Interest Graph. To build a graph of the things that interest Hacker News. Continue reading →. One of the often overlooked features in Neo4j. Is the “TransactionEventHandler” capabilities… better known in the database world as “ Triggers. Continue reading →. One Direction Relationships in Neo4j. In the Neo4j Property Graph. Get all ...

maxdemarzi.com

Testing | Max De Marzi

https://maxdemarzi.com/category/testing-2

Ruby Graphs with Neo4j. Continue reading →. As far as SSDs go. So definitely not a production grade server, so bear that in mind. Continue reading →. Per second on 300 servers. Then Aerospike claiming 1 Million writes. Per second on 50 servers. MongoDB claiming almost 32k writes per second. On a single server, but claiming Cassandra can only do 6k w/s and Couch can only do 1.2k w/s on a single server… Then ScyllaDB has almost 2 Million writes. Per second on 3 servers blowing everybody away. Once we downl...

maxdemarzi.com

Services | Max De Marzi

https://maxdemarzi.com/services

Ruby Graphs with Neo4j. If you live anywhere near Chicago, come to the Graph Database – Chicago. Embarking on a graph project and want to get your development team up to speed? I’ll be happy to train you or your team on or off-site. I can teach half-day and full-day classes as well as multi-day hands-on workshops with your data. I am available for on-site and remote, part-time and full-time consulting to build your project or provide guidance to your team. 5 thoughts on “ Services. June 3, 2015 at 6:21 AM.

maxdemarzi.com

graph | Max De Marzi

https://maxdemarzi.com/tag/graph

Ruby Graphs with Neo4j. Continue reading →. For the most part, I hate competitive benchmarks. The vendor who publishes them always seems to come out on top regardless. The numbers are always amazing, but once you start digging in a little bit you start to see faults in what is actually being measured and it never applies to real world workloads. For example you have Cassandra claiming 1 Million writes. Per second on 300 servers. Then Aerospike claiming 1 Million writes. Continue reading →. Was introduced...