Touring A Carnival Cruise Simulator: 210 Degrees Of GeForce-Powered Projection Systems

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Overall, this was a fascinating example of how improvements in GPU hardware have allowed companies to build simulation centers that weren’t really possible before. Shipping companies and airlines have used some type of simulation for decades, but the type and nature of the environments those simulations can include is rapidly expanding — and such improvements at the industrial scale inevitably trickle down to consumer hardware and applications.

via Touring A Carnival Cruise Simulator: 210 Degrees Of GeForce-Powered Projection Systems.

What Can A Raspberry Pi Do In Space?

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The Astro Pi board is a Raspberry Pi HAT and will comprise the following:

  • Gyroscope, accelerometer and magnetometer sensor
  • Temperature sensor
  • Barometric pressure sensor
  • Humidity sensor
  • Real time clock with backup battery
  • 8×8 RGB LED display
  • Several push buttons

It will also be equipped with both camera module and an infra-red camera.

via Astro Pi – What Can A Raspberry Pi Do In Space?.

During his mission Tim Peake will deploy the Astro Pis, upload the winning code whilst in orbit, set them running, collect the data generated and then download it to be distributed to the winning teams.

Marines dump Microsoft for Linux OS on Northrop Grumman radar

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In a statement released Friday, she said Microsoft Windows XP is no longer supported by the software developer and the shift to a DOD approved Linux operating system will reduce both the complexity of the operating system and need for future updates.

via Marines dump Microsoft for Linux OS on Northrop Grumman radar – capitalgazette.com.

Apple, IBM partnership yields first results: 10 mobile apps

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The plan calls for IBM will resell Apple devices with its software pre-installed. IBM activation, management and security software are also involved in the deal. The partnership aims to give Apple the credibility it still has not quite achieved in IT departments and bring IBM into a popular mobile ecosystem.

via Apple, IBM partnership yields first results: 10 mobile apps | ITworld.

how to calculate packet loss from a binary TCPDUMP file

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You can measure packet retransmits from the client to the server by counting the number of duplicate sequence numbers.

Packet retransmits from the server to the client can be measured by counting duplicate Ack numbers.

Note that a retransmit is triggered by more than just total loss (= timeout); if the remote machine rejects the packet, or the packet is corrupted, the local machine must also retransmit.

via networking – how to calculate packet loss from a binary TCPDUMP file – Server Fault.

I needed a way to measure this on a wifi network where packet loss can be very high and bursty.  This answer seems relatively simple to implement — just store off  ACK sequence numbers into an array of limited size and count how many times every new ACK matches in that array.  By monitoring this count I can determine where and when certain areas are getting bad and perhaps alert or alarm based upon a certain threshold.

Kepler’s Three Laws

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Kepler’s three laws of planetary motion can be described as follows:

  • The path of the planets about the sun is elliptical in shape, with the center of the sun being located at one focus. (The Law of Ellipses)
  • An imaginary line drawn from the center of the sun to the center of the planet will sweep out equal areas in equal intervals of time. (The Law of Equal Areas)
  • The ratio of the squares of the periods of any two planets is equal to the ratio of the cubes of their average distances from the sun. (The Law of Harmonies)

via Kepler’s Three Laws.

Pluto-bound spacecraft ends hibernation to start mission

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New Horizons is now so far away that radio signals traveling at the speed of light take four hours and 25 minutes to reach Earth.

The scientific observation of Pluto, its entourage of moons and other bodies in the solar system’s frozen backyard begins Jan. 15, program managers said. The closest approach is expected on July 14.

via Pluto-bound spacecraft ends hibernation to start mission | Reuters.

The Cost of the “S” in HTTPS

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 HTTPS may introduce overhead in terms of infrastructure costs, communication latency, data usage, and energy consumption. Moreover, given the opaqueness of the encrypted communication, any in-network value added services requiring visibility into application layer content, such as caches and virus scanners, become inef fective.

Via The Cost of the “S” in HTTPS

The Mathematical Trick That Helped Smash The Record For The Largest Number Ever Factorised By A…

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And in any case, because this trick works using only 4 qubits, it can easily be reproduced on any classical computer. So it’s not so useful after all.

via The Mathematical Trick That Helped Smash The Record For The Largest Number Ever Factorised By A… — The Physics arXiv Blog — Medium.

Here’s a paper on this subject:

[1411.6758] Quantum factorization of 56153 with only 4 qubits.

CoreOS is building a container runtime, Rocket

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What is Rocket?

Rocket is an alternative to the Docker runtime, designed for server environments with the most rigorous security and production requirements. Rocket is oriented around the App Container specification, a new set of simple and open specifications for a portable container format.

via CoreOS is building a container runtime, Rocket.