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Ask Slashdot: How Would You Build a Microsatellite?

riboch University Nanosats (117 comments)

Professor James Cutler: http://aerospace.engin.umich.edu/people/faculty/cutler/index.html
RAX: http://rax.engin.umich.edu/

Prof. Cutler works on novel nanosats and how to streamline the nanosat process. He will probably push you off to his students, but I am sure they can point you in a better direction, what sort of commerical off the shelf (COTS) parts you can get and applicable restrictions.

about 2 years ago
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Expect Mandatory 'Big Brother' Black Boxes In All New Cars From 2015

riboch Re:Your Car Likely Has A Black Box ALREADY (628 comments)

Better call the RIAA and ASCAP, I believe that is an unauthorised recording if I am listening to music.

more than 2 years ago
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Piratbyran Co-Founder Says Stop DDoSing Polish Sites

riboch ZA NASZA I WASZA WOLNOSC?! (140 comments)

In Poland we have a motto "Za nasza i wasza wolnosc" which roughly translates to "For our freedom and yours."

These politicians have forgotten from where they came.

more than 2 years ago
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The Fjord-Cooled Data Center

riboch Hitchhikers Reference (195 comments)

As long as they do not destroy Slartibartfast's fjords then I am "cool" with it.

more than 2 years ago
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Ask Slashdot: How To Enter Private Space Industry As an Engineer?

riboch Aerospace Engineering Graduate Student (283 comments)

I am an Aerospace Engineering/Mathematics Grad Student at the University of Michigan, Ann Arbor. I do more theoretical work now, but I think I can offer a little advice.

If you want to stay state side I would also recommend (in no particular order) you look at U of M, Purdue, Georgia Tech, Cornell (Aero/Mech), Caltech, Stanford (Aero/Mech) and the University of Maryland (more aeronautical).

The biggest thing is to get involved with research projects. Look at current professors and their research interests, see if they have anything related to satellite/rocket design. Do not be afraid to ask/e-mail. Professors and grad students alike love getting undergrads involved, perhaps because they usually come free.

If you do look at Michigan I can recommend looking at Professor Cutler and his RAX project or professors in the Atmospheric, Oceanic and Space Sciences (AOSS) department. Several people from my graduating class who took Aerosp 483 went on to SpaceX, Virgin Galactic and Bigelow Aerospace, so there is a network.

For more U of M information look at:
Professor Cutler: http://aerospace.engin.umich.edu/people/faculty/cutler/
RAX: http://rax.engin.umich.edu/
AOSS: http://aoss.engin.umich.edu/

more than 3 years ago
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Mac OS Update Detects, Kills MacDefender Scareware

riboch Re:So Mac Users should expect this? (277 comments)

Due to copyright '*Security Essentials' will not be available, instead it will be the "Apple Security Software Store" or the ASS Store for short.

more than 3 years ago
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WikiLeaks Founder 'Free To Leave Sweden'

riboch Mainstream Media (410 comments)

Has anyone noticed how most of the mainstream: CNN, BBC, etc. have not picked up on this yet?

more than 4 years ago
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Equatorial Mounts For Budget Astrophotography?

riboch Very tricky (85 comments)

I hope you are not intending on photographing a meteor from a telescope.

The most common thing to when photographing meteor showers is to point to the pole star and set your SLR (hopefully manual, film based on a tripod with a cable for the shutter) to a B setting and take a shot for a couple of hours. This produces really nice star trails and the occasional meteor.

If you are piggybacking the camera to a telescope you should not have any issues with the motor vibration, but you will need to beware of wind.

Save up your money and buy a Meade LX200, you can now get the older models (I personally think are better) for around 2000$US, combine that with a wedge and reticle eyepiece and you are ready to go. The thing really is a light bucket and something you will be happy with, with a little training you can even work out the periodic error correction with the scope so you can do astrophotography with the camera for the eyepiece.

If that is not satisfactory, build an adjustable wedge and buy a motor that rotates at 15 deg/hour and attach the motor to the top of the wedge with a camera on it.

more than 4 years ago
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Best OSS CFD Package For High School Physics?

riboch CFD or Load Analysis? (105 comments)

Are you looking for real CFD software for pressure distributions or are you looking for something that returns lift, drag, side and moments?

On the CFD side: OpenFOAM. Learning this is quite a bit of work because you need to work with meshing, boundary conditions, etc. But I would be very surprised you really want flow visualisation.

For loads: XFOIL or AVL (Athena Vortex Lattice, http://web.mit.edu/drela/Public/web/avl/). AVL allows 3D visualisation of loads, perturbations, etc. When it comes to a first iteration in aeroplane design this is first thing we use in academia and is quite nice. XFOIL is 2D and is used for analysis on an aerofoil. Both allow arbitrary geometries, but I believe both are strictly for inviscid flows.

What theories in particular are you trying to validate?

more than 4 years ago
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Why Windows 7 "Slate" Tablets Won't Happen

riboch Archos 9 (467 comments)

Archos 9 (http://www.archos.com/products/nb/archos_9/index.html?country=us&lang=en) ships with Windows 7, the older Archos 7 and Archos 5 shipped with Angstrom Linux and they even release the source code.

more than 4 years ago
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Cassini's Elaborate Orbital Mechanics

riboch Re:Wouldn't it be cool... (116 comments)

It is probably MATLAB linked with Astrogator/STK.

MATLAB has the standard integrators, plus it has a decent optimisation toolbox and STK allows for neat visualisations.

more than 4 years ago
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Saturn's Strange Hexagon Recreated In the Lab

riboch Von Karman (103 comments)

It looks like a radial Von Karman Vortex Street, typically seen for low Reynolds numbers for flow over a cylinder. To me it like a Lorentz transformation similar to electrical current going in circles creating a magnet, and vice versa.

more than 4 years ago
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New Type of Dinosaur Unearthed

riboch Re:Actually (160 comments)

My degrees are not in paleontology, but let me educate you on how this works:

Undergraduate student/intern finds/makes something, gives to professor. Professor is collaborating with professor at another university. Professor at another university gives a graduate student some work. The student does all the leg work, finds an anomaly, reports to his professor who reports back to original professor. Because of an arrangement, the place of origin of the specimen is given publication priority.

Chances are the lead author is the highest in the food chain.

more than 4 years ago
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Why Flash Is Fundamentally Flawed On Touchscreen Devices

riboch Archos (521 comments)

Can I recommend you look at the Archos. Flash works very well. I can play games, watch videos, etc., on my Archos.

more than 4 years ago

Submissions

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Algebra In Wonderland

riboch riboch writes  |  more than 4 years ago

riboch (1551783) writes "The NY Times ran an op-ed piece about the mixture of "New Maths" to Charles Dodgson's (pen name Lewis Carroll) "Alice in Wonderland." An interesting article discussing the parody of the new strange mathematics and a new take on the book. Although topical only because of Tim Burton's new release, it is an interesting read."
Link to Original Source

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