2018-11 :: Kai Ruhl :: link to article
Kowoma [de] describes the components of satellite navigation (GPS, Glonass, Galileo, Beidou) signals, here GPS: The coarse acquisition (C/A) code with 1023 bit, unique per satellite and starting anew each millisecond, going 300m at light speed; and the precise (P) military code which is 750MB encrypted, taking a week to transmit. Both are XORed with the navigation data, including telemetry, clock, and orbit. Modern GPS variants add L2C (successor to C/A); L5 for increased robustness; and L1C for redundancy and Galileo interoperability. The Interface Control Document is public.
2018-10 :: Kai Ruhl :: link to article
An Imgurian shares an animation of summer and winter on Earth's surface. You can also watch the current wind on Earth or the satellite and space debris in Earth's orbit, or a bit below, aeroplane flights on Earth.
2018-09 :: Kai Ruhl :: link to article
An Imgurian, The Gear Caster and Hot New Tech report on the Hover Glide floating backpack: The bag is mounted onto a rail, and the up-and-down movements while walking are stabilized, reducing effective load on the wearer.
2018-08 :: Kai Ruhl :: link to article
Heise reports on the Processing programming language [wiki], a strongly simplified Java variant plus environment, suited for beginners in order to build computer graphics with slight interaction, up to small games.
2018-07 :: Kai Ruhl :: link to article
An Imgurian posts some animations on how wisdom teeth (M3) are removed by dental extraction: Depending on orientation, separation into multiple parts and piece-wise removal. And lots of effort to stop the blood flow.
2018-06 :: Kai Ruhl :: link to article
In 2018, the term "small phone" has come to mean 5" where in the 2000s a big phone was 3". Currently, one of the few 2.5" phones is the Jelly by Unihertz, which will get a ruggedized version named Atom presumably end of of 2018.
2018-05 :: Kai Ruhl :: link to article
The Librem (11, 13, 15) notebook line by Purism is expanded by a PureOS (Debian base) phone, the Librem 5, presumably in early 2019, currently starting devkit production. After OpenMoko (2007) and BQ Aquaris (2014, with Ubuntu Touch), it will be interesting to see how the Librem 5 fares.
2018-04 :: Kai Ruhl :: link to article
An Imgurian provides some section photos of submarine communication aka undersea cables, at least half a meter in diameter. Protected by stranded steel and an outer and inner layer of water-resistant polyethylene (plastic).
2018-03 :: Kai Ruhl :: link to article
Slashgear and The Verge report on the Tap Keyboard, five cable-connected rings that allow one-handed text input and mousing by analysing your hand movements via accelerometer. Connects by bluetooth, no Linux though. Costs 200 EUR.
2018-02 :: Kai Ruhl :: link to article
Peta Pixel, DP review and Image Sensors World report on the cutting edge in high-speed cameras: The Phantom V2640 can do 2000x2000 px at 6000 fps and HD at 11000 fps, in color. Excessive lighting is a prerequisite.
2018-01 :: Kai Ruhl :: link to article
Slashgear reports on a Google Doodle reminiscent of Logo (1967) [wiki] and Scratch (2002) [wiki], visual programming languages designed for kids prior to achieving reading comprehension. Another visual variant is Alice (1994) [wiki] which focuses on 3d animation.
2017-12 :: Kai Ruhl :: link to article
An Imgurian built his own split keyboard. Cherry keycaps and an USB controller like the Teensy can be bought, and you need to do the wiring yourself. Commercial variants include the KeyMouse where both sides are also a mouse (500 EUR) and the ErgoDox which gives your thumb more to do [review] (300 EUR). Would be nice to add a RollerBar replacement, as built by Judy of the Woods.
2017-11 :: Kai Ruhl :: link to article
Imgur showcases the BFS-Auto book scanner by Uni Tokyo, Japan, a research prototype capable of 4 pages/second (video). Uses a slow-moving cylinder to release pages quickly, laser scanner+stereo cameras for realtime page form recognition (and undeforming), and finally optical character recognition (OCR).
2017-10 :: Kai Ruhl :: link to article
Holding a laser pointer to the end of a fiber optic cable nicely shows the total internal reflection producing a sine wave, which can travel around curves in the cable, illustrated by Imgur. Howstuffworks and Explainthatstuff have more details.
2017-09 :: Kai Ruhl :: link to article
PetaPixel reports on the bridge (i.e. non-changeable lens) camera RX10 by Sony, with the lens being a wide 24mm at minimum and a pretty zoomy 600mm at maximum. Comes with up to 960 fps video and a tracking auto-focus that is targetted at sport events. However, its 13mm width image sensor does not capture as much light as APS-C with 23mm or full frame with 35mm.
2017-08 :: Kai Ruhl :: link to article
PetaPixel and TheVerge report on the state of Project Tango, an active light depth sensor (infrared structured light) for phones. Apparently, Qualcomm produces new off-the-shelf components. Previous phones with Tango were the Lenovo Phab2 Pro (2016) and the Asus Zenfone AR (2017).