NASA JPL’s Orbiting Carbon Observatory 2 (OCO-2) was launched into sun-synchronous orbit around the Earth on July 2, 2014. It carries 3 grated spectrometers for measuring the spectrum of sunlight reflected off the surface of the earth, which is used to calculate the average concentration of Carbon Dioxide in the column of atmosphere beneath the satellite (XCO2). It takes 16 days to provide full coverage of the Earth’s surface.
I am using the R packages datadr and Trelliscope from the DeltaRho project (formerly called Tessera.io) to explore and visualise the XCO2 observations from the OCO-2 Level 2 Lite version 7R data product.
Some R packages will not install without an active X window session, so if you are not logged in to a graphical interface on the machine you will need to connect via SSH with X-forwarding enabled, such as with PuTTY and VcXsrv on Windows.
Most of this guide must be run from the Linux terminal as the user who will be running R. That user must be allowed to run commands as root with sudo.
Deus Ex is widely regarded as one of the best computer games of all time, thanks to its immersive dystopian future setting, RPG-style character development, and a story that begins with a New York terror attack (before 9/11 happened), a genetically-designed disease outbreak (before CRISPR), and real conspiracy theories like global internet surveillance (before Snowden).
When you visit a website on your computer or mobile device, you are potentially sharing that information with advertisers, hackers, co-workers and governments. Even though the content you are viewing is likely to be encrypted with HTTPS, your metadata (including the URL and IP address of websites you visit, your IP address, the time and date, information about your web browser and computer hardware) can be collected and stored by anyone eavesdropping on the wire between you and the web server, to be used against you in targeted advertising campaigns, phishing scams, profiling, and soon robot assassination.
This essay was written by SFAM, founder of the defunct website cyberpunkreview.com on February 4, 2006. See the original at the Internet Archive.
Overview: Since online debate around the Matrix Trilogy has been beaten to death, I’m guessing by now you’ve already long ago made up your mind on whether you liked or hated The Matrix and its subsequent sequels. Truly, whatever you decided is fine with me. As it turns out, I love them and generally think they’re great. And NO, I’m not really interested in having a Matrix Sucks/No You just don’t get it discussion. Please start a new thread in the Meatspace if you’re still interested in such banter. This essay is for something else – it’s about viewing the trilogy, specifically Neo, from a man-machine interface, or cybernetics perspective.
In a previous post I showed how a firewall app on Android can prevent metadata leaks when you connect to a wireless network but have not yet connected to your VPN. This guide achieves the same goal with OpenVPN or Torguard Lite on a Linux PC, blocking all outgoing connections and then allowing connections only to the VPN server.
We recently acquired a Nvidia GTX Titan graphical processing unit (GPU) for statistical computing at work, specifically double-precision floating point operations on the CUDA API. Before I lock it away in the server room I would like to see how it compares to my primary GPU at home – a Nvidia GTX 680, and my older GPUs – a pair of AMD Radeon HD 5770. This act of comparison is called benchmarking – running a number of standard tests and trials in order to assess the relative performance of a piece of hardware or software.
Does your internet feel slower in the evenings or on weekends? This Python script downloads a 3MB file every 5 minutes to log your download speed in a CSV file. You can change the frequency or choose a different file by editing the script.