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Rob Jongschaap
Worked at University of Twente
Attended Leiden University
Lives in Netherlands
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Rob Jongschaap

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How to boost your WiFi speed by choosing the right channel | ExtremeTech

'Wireless networks have come a long way in the past 15 years. And yet, sustained WiFi speeds are still a vexing problem in a lot of situations. A number of things can come into play, such as the way your router is set up, whether there’s nearby interference, if you live in an apartment building or a separate house, and how far apart your devices are from the router. Fortunately, there’s always a way to fix slow transfer speeds.'

http://www.extremetech.com/computing/179344-how-to-boost-your-wifi-speed-by-choosing-the-right-channel
Some channels in WiFi routers are indeed much faster -- but that doesn't mean you should go ahead and change them. Read on to find out more about interference and the massive difference between 2.4GHz and 5GHz WiFi.
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I always use WiFi, +Abigail van Rooyen and usually it works quite well, without bothering too much about these settings ...

Rob Jongschaap

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Oregon's Lost Lake is disappearing through a strange hole : TreeHugger

'... The hole has been there as long as anyone can remember, Jude McHugh, spokeswoman with the Willamette National Forest, told The Bulletin. And while the hole may appear to be one of those oddest of mysteries that nobody can quite figure out, the explanation is rather simple. The volcanic landscape of the area gives way to a number of quirky geologic traits – the one responsible for swallowing the lake is a lava tube. The tunnel-like structure is formed when flowing lava hardens near the surface but continues to flow downwards, and the inner lava escapes before hardening. The result, a tube that opens to the surface and leads to the mysterious depths below.

McHugh says it’s unclear exactly where the water goes, but it possibly seeps into the porous subsurface underground, refilling the expansive aquifer that feeds springs on both sides of the Cascades.
...'

http://www.treehugger.com/natural-sciences/oregons-lost-lake-disappearing-through-mysterious-hole.html
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Lens turns smartphone into a microscope: Costs only 3 cents -- ScienceDaily

'Researchers at the University of Houston have created an optical lens that can be placed on an inexpensive smartphone to magnify images by a magnitude of 120, all for just 3 cents a lens.'

http://www.sciencedaily.com/releases/2015/05/150504113004.htm

SPIE | Journal of Biomedical Optics | Fabricating optical lenses by inkjet printing and heat-assisted in situ curing of polydimethylsiloxane for smartphone microscopy

'Abstract. We present a highly repeatable, lithography-free and mold-free method for fabricating flexible optical lenses by in situ curing liquid polydimethylsiloxane droplets on a preheated smooth surface with an inkjet printing process. This method enables us to fabricate lenses with a focal length as short as 5.6 mm, which can be controlled by varying the droplet volume and the temperature of the preheated surface. Furthermore, the lens can be attached to a smartphone camera without any accessories and can produce high-resolution (1  μm) images for microscopy applications.'

http://biomedicaloptics.spiedigitallibrary.org/article.aspx?articleid=2279353
Researchers have created an optical lens that can be placed on an inexpensive smartphone to magnify images by a magnitude of 120, all for just 3 cents a lens.
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Why Scientific American's Predictions from 10 Years Ago Were So Wrong

'Recently, we did an experiment: We took an outdated issue of a respected popular science magazine, Scientific American, and researched exactly what happened to the highly-touted breakthroughs of the era that would supposedly change everything. What we discovered is just how terrible we are at predicting the long arc of scientific discovery.'

http://gizmodo.com/why-scientific-americans-predictions-from-10-years-ago-1701106456/+charliejane
Recently, we did an experiment: We took an outdated issue of a respected popular science magazine, Scientific American, and researched exactly what happened to the highly-touted breakthroughs of the era that would supposedly change everything. What we discovered is just how terrible we are at predicting the long arc of scientific discovery.
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Time lasts long and everything is much +Katrin Boeke-Purkis :-)

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Ukrainian Artist Transforms Nature Patterns Into Sound Waves | DeMilked

' ... The project was inspired by Ms. Marinenko’s time in nature, and especially the meditative moments watching the water. “It made me thoughtful and concentrated, I noticed line of reed on the opposite riverside reflected in water,” she wrote on Behance. “It was so similar to picture which I see everyday on my music player screen.” Thus, the project was born. ... '

http://www.demilked.com/landscape-form-visualization-nature-sound-waves-anna-marinenko/
Sound waves are probably the most restrained visualization of sound you'll see on a computer, but Anna Marinenko sees a certain similarity between these waves and reflections of landscape on water.
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This new mood board app could beat Pinterest at its own game | App design | Creative Bloq

' ... "Sites like Pinterest are great for scrapbooking inspiration, but Thoughtflow is made for exploring them. Its main focus is to start ideas, track them, and keep them coming." Starting with any word or image, you'll be presented with colours, emotions, politics or any other number of themes. Have a go and see for yourself. ... '

http://www.creativebloq.com/inspiration/new-mood-board-app-41514820
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World's Largest Swarm of Miniature Robot Submarines - IEEE Spectrum

'Forty one tiny robot submarines is a lot of tiny robot submarines. It’s so many, in fact, that controlling them individually doesn’t make sense, and the only way to go is to give them levels of swarm intelligence, so that each individual robot can take care of itself while the swarm as a whole completes an objective.

The CoCoRo (Collective Cognitive Robotics) Project, sponsored by the European Commission, has been working with a heterogeneous swarm of autonomous underwater vehicles (AUVs) since 2011 ...
...'

http://spectrum.ieee.org/automaton/robotics/artificial-intelligence/worlds-largest-swarm-of-miniature-robot-submarines

Home | CoCoRo

'The CoCoRo project aims to create an autonomous swarm of interacting, cognitive robots. CoCoRo will develop a swarm of autonomous underwater vehicles (AUVs) that are able to interact with each other and which can balance tasks. Focal tasks of the CoCoRo-swarms are: 
ecological monitoring, searching, maintaining, exploring and harvesting resources in underwater habitats.

- Generating small autonomous underwater vehicles that are able to organize themselves with local neighbours.
- Generating robust swarming motion principles that work also in natural, noisy and dynamic environments.
- Generating swarm-level cognition within such an underwater swarm.
- Comparing the achieved level of global cognition to biological reference organisms.
- Developing cognition-based mechanisms that allow long-term survivability of systems.
- Taking an interdisciplinary approach to address collective cognition and self-awareness issues.
- Developing novel autonomic systems capable of swarm-level 
self-identification.
...'

http://cocoro.uni-graz.at/drupal/home
A fleet of little robot submarines is learning to cooperatively perform tasks underwater
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Hey the stuff societies are developing are out of this world. This reads like a gentle project

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New chip architecture may provide foundation for quantum computer

' ... In a paper appearing this week in the Journal of Applied Physics, from AIP Publishing, a team of researchers at Georgia Tech Research Institute and Honeywell International have demonstrated a new device that allows more electrodes to be placed on a chip—an important step that could help increase qubit densities and bring us one step closer to a quantum computer that can simulate molecules or perform other algorithms of interest. ... '

http://phys.org/news/2015-05-chip-architecture-foundation-quantum.html

Ball-grid array architecture for microfabricated ion traps

'Abstract

State-of-the-art microfabricated ion traps for quantum information research are approaching nearly one hundred control electrodes. We report here on the development and testing of a new architecture for microfabricated ion traps, built around ball-grid array (BGA) connections, that is suitable for increasingly complex trap designs. In the BGA trap, through-substrate vias bring electrical signals from the back side of the trap die to the surface trap structure on the top side. Gold-ball bump bonds connect the back side of the trap die to an interposer for signal routing from the carrier. Trench capacitors fabricated into the trap die replace area-intensive surface or edge capacitors. Wirebonds in the BGA architecture are moved to the interposer. These last two features allow the trap die to be reduced to only the area required to produce trapping fields. The smaller trap dimensions allow tight focusing of an addressing laser beam for fast single-qubit rotations. Performance of the BGA trap as characterized with 40Ca+ ions is comparable to previous surface-electrode traps in terms of ion heating rate, mode frequency stability, and storage lifetime. We demonstrate two-qubit entanglement operations with 171Yb+ ions in a second BGA trap.'

http://scitation.aip.org/content/aip/journal/jap/117/17/10.1063/1.4917385
Quantum computers are in theory capable of simulating the interactions of molecules at a level of detail far beyond the capabilities of even the largest supercomputers today. Such simulations could revolutionize chemistry, biology and material science, but the development of quantum computers has been ...
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10 tips for better slide decks | TED Blog

'Aaron Weyenberg is the master of slide decks. Our UX Lead creates Keynote presentations that are both slick and charming—the kind that pull you in and keep you captivated, but in an understated way that helps you focus on what’s actually being said. He does this for his own presentations and for lots of other folks in the office. Yes, his coworkers ask him to design their slides, because he’s just that good.

We asked Aaron to bottle his Keynote mojo so that others could benefit from it. Here, 10 tips for making an effective slide deck, split into two parts: the big, overarching goals, and the little tips and tricks that make your presentation sing.'

http://blog.ted.com/10-tips-for-better-slide-decks/
Aaron Weyenberg is the master of slide decks. Our UX Lead creates Keynote presentations that are both slick and charming—the kind that pull you in and keep you captivated, but in an understated way...
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Fjords Play Crucial Role in Regulation of Earth’s Climate | Climatology, Geoscience | Sci-News.com

'According to a new study in the journal Nature Geoscience, fjords absorb approximately 18 million tones of organic carbon each year, equivalent to 11 percent of annual marine carbon burial globally.'

http://www.sci-news.com/othersciences/climatology/science-fjords-role-earths-climate-02766.html
According to a new study in the journal Nature Geoscience, fjords absorb approximately 18 million tones of organic carbon each year.
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Windows 10 for Raspberry Pi 2 now available for download | ExtremeTech

'Microsoft has followed up on its February promise to make Windows 10 available for the Internet of Things and has finally shipped a preview of the operating system for the Raspberry Pi 2. The RBP 2 isn’t the only device supported — the new Windows 10 IoT Core Insider Preview (we didn’t name it, don’t blame us) is also available for the MinnowBoard Max.'

http://www.extremetech.com/computing/204925-windows-10-for-raspberry-pi-2-now-available-for-download

Microsoft brings Windows 10 to Makers

' ... Windows 10 IoT Core Insider Preview and Raspberry Pi 2 With this Insider Preview release of Windows 10 IoT Core, we’re bringing the power of Windows to Raspberry Pi 2 for the first time. We’re embracing the simple principle of helping Makers and device builders do more by bringing our world-class development tools, the power of the Universal Windows Platform, direct access to hardware capabilities, and the ability to remotely debug, update, and manage the software running on Raspberry Pi 2 devices. This Insider Preview release of Windows 10 IoT Core is our conversation-starter. ... '

http://blogs.windows.com/buildingapps/2015/04/29/microsoft-brings-windows-10-to-makers/
Microsoft has announced that the preview of Windows 10 is now available for the Raspberry Pi 2. Is this the beginning of Redmond's push into the Internet of Things?
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A Sweet App That Helps You Visualize Complex Rhythms | WIRED

'... Rhythm Necklace is a simple toy for exploring complex rhythms. It’s built around an alternate form of notation called a “rhythm necklace,” in which musical patterns are represented in circular form. The advantage of the circle is that it lets you see rhythm as a series of shapes. Imagine a sped-up clock that played a kick drum whenever the second hand passed the 12, the 3, the 6, and the 9. The diamond contained within these points would reflect the steady thump of the music. Skew the shape and you change the beat.

Rhythm necklaces have been used in fields like radio astronomy and nuclear physics to visualize repeating patterns, but they’ve been most widely used in ethnomusicology. NYU computer scientist Godfried Toussaint uses them extensively in his book The Geometry of Musical Rhythm, which shows how music from disparate cultures is built around surprisingly similar geometric patterns.
...'

http://www.wired.com/2015/05/sweet-app-helps-visualize-complex-rhythms/

Make music with shapes. - Rhythm Necklace

' ... Rhythm Necklace is a sequencer for composing rhythmic loops. ... '

http://rhythmnecklace.com/
Rhythm Necklace is a simple toy for exploring complex rhythms.
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Education
  • Leiden University
    Physical Chemistry, 1962 - 1970
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Introduction
Collecting valuable, interesting, remarkable and/or funny items about science, technology and more.
Work
Occupation
retired
Employment
  • University of Twente
    Physics: teaching & research, 1970 - 2001
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HG-architecture morphs wooden modules into pixelated spiral structure - ...
www.designboom.com

HG-architecture has designed 'part to whole', an installation placed within korea's national museum of modern and contemporary art.

Rainbow world: the most colourful places on Earth – in pictures
www.theguardian.com

The world is full of landscapes that are so surreal, and so intensely coloured, that it’s hard to believe they really exist. Take a look at

WIRED Space Photo of the Day | Science | WIRED
www.wired.com

Previous Galleries Space Photo of the Day for June 2014 Space Photo of the Day for May 2014 Every day, we find another awesome photo of spac

101 Years of Tour de France Globalization
www.nationalgeographic.com

This year is the 101st edition of the Tour de France. What was once a predominantly French race — created to up the sales of the sports news

no name design exhibition of 1000 objects at triennale design museum - d...
www.designboom.com

'no name design' offers a survey of the ingenuity and intelligence of the anonymously mundane.

A perfect negative crystal floating in space - 01 July 2014 - New Scientist
www.newscientist.com

What looks like a solid octahedron is actually a void inside a chunk of spinel, a gem best known as the centrepiece of the British queen's I

Txchnologist
txchnologist.com

Researchers have developed a detailed picture of one of the complex molecular machines inside the nucleus of our cells. A University of Wisc

10 Awesome science sculptures
www.sciencedump.com

The combination of Science and Art is something that really inspires me. It boths shows the beauty but also the mystery of what you normally

Cardboard
market.android.com

With your phone and a piece of Cardboard you can see some pretty amazing stuff. Try out a set of demos showing immersive experiences on Andr

Health 'Buzzwords' Encourage Consumers to Buy Certain Food Products
www.scienceworldreport.com

Our food choices may be partially influenced by certain health buzzwords that lull consumers into thinking certain products are "better" for

BCXSY create linear clock for Designers’ Days
www.dezeen.com

This prototype clock by Boaz Cohen and Sayaka Yamamoto tells the time in a straight line by replacing the hands with a pivoting shell-like s

Earth from Space: Desert bullseye
www.esa.int

Earth from Space is presented by Kelsea Brennan-Wessels from the ESA Web-TV virtual studios. Discover a giant geological wonder in the Sahar

Poll: Most Americans Think Future Tech Will Make Life Better (Infographic)
www.livescience.com

59 percent of those polled were optimistic, while 30 percent thought the changes would make people worse off.

apple presents 30 years of mac, highlighting 30 years of classic design ...
www.designboom.com

30 years of mac: thirty years ago, most people didn’t even know how to use a computer.

Hoe kun je van een biljartbal een banaan maken?
www.volkskrant.nl

Antimaterie klinkt als sciencefiction, maar wordt in ziekenhuizen al toegepast in een PET-scanner om bijvoorbeeld een tumor te lokaliseren.

Are humans changing the world faster than animals can evolve?
www.cbsnews.com

Humans are fundamentally changing the planet and could be causing nearly 20,000 species to become extinct. Elizabeth Kolbert, author of "The

Astronomers have found the oldest known star in the universe
www.euronews.com

Australian astronomers have found the oldest known star in the universe, a discovery that may help to resolve a long-standing discrepancy be

Shelters resembling giant pompoms warm skaters on a frozen river
www.dezeen.com

Canadian firm RAW Design has created a series of skating shelters that look like giant pompoms to keep skaters warm on a frozen river in Win