Virvatulet

Virvatulet

Lives in Finland Finland
Joined on Jul 25, 2005

Comments

Total: 56, showing: 1 – 20
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On Inside RA001: World's first Boeing 747 'Jumbo Jet' article (127 comments in total)
In reply to:

Don Colbert: I've sat in that flightdeck with the old three man crew hundreds of times during my troubleshooting career at Boeing. Now it's all glass and the P4 to the right is gone.

@DomW
Thanks for the insightful info. One more note, touchscreen control scheme is inherently more prone to erratic unintended user input, not a good thing in especially during stressful situations.

Direct link | Posted on Oct 3, 2014 at 02:08 UTC
On Inside RA001: World's first Boeing 747 'Jumbo Jet' article (127 comments in total)
In reply to:

Chuck Lantz: I noticed a couple of interesting bits; ... an ashtray at the engineers station, and a panel where "gauge" is spelled "guage." Kinda makes me wonder what else they got wrong in all those goodies.

But then again, that would be just another cynical premeditated marketing exercise; something the tobacco industry has historically been exceptionally good at. I find the comment distasteful, considering the fact that Humphrey Bogart's death at age of 57 was, to a degree, furnished by it.

Nicotine is a potent psychotropic drug that alters its user's neurobiological functions and processes (like reward - reinforcement neurotransmitters) leading to conditioning towards its dose administration; making user's cognition more inflexible, and thus being unable to change behavioural patterns despite of adverse effects. Nicotine affects neuropsychological fundamentals like attentional control and stimulus conflict resolving, even though it seldom does induce strong euphoria or intoxication effect (dose and tolerance dependent). What this all and pending withdrawal mean to a person's ability to function well...

Addiction is a choice, but only as long as one is not addicted to. Choose wisely.

Direct link | Posted on Oct 3, 2014 at 01:54 UTC
In reply to:

Lee Jay: I'm having a hard time understanding how this could not produce lots of astigmatism, coma, CA and so on. Also, it would seem that aperture would be constant leading to either a very narrow zoom range, some crazy fast f-stops at the wide end, or some crazy slow f-stops at the long end.

Couldn't this actually be, not aspherical lens elements in its traditional meaning, but more of like interleaved micro partial lens surface arrays? Certainly the stated micron-scale lateral movements suggest towards something like that.

Direct link | Posted on Sep 30, 2014 at 20:35 UTC
On Inside RA001: World's first Boeing 747 'Jumbo Jet' article (127 comments in total)
In reply to:

beavertown: Airbus is better than Boeing.

@Plastek
If that was intended for me, no, I don't see myself that way at all.

Gaining understanding from where we have come from and how we got to this point, and appreciating the effort and even sacrifices of those who brought us here, don't have to mean that one craves for the past.

I guess one has to be a physicist, a romantic one I might add, to be able to relate... Cheers!

Direct link | Posted on Sep 30, 2014 at 17:03 UTC
On Inside RA001: World's first Boeing 747 'Jumbo Jet' article (127 comments in total)
In reply to:

beavertown: Airbus is better than Boeing.

As much as I respect the enormous engineering effort and sophistication behind the contemporary Airbus offerings, I can not help myself not to somehow feel engineering science nostalgia when looking at these images.

These are echoes from the pioneering era; most of this stuff was basically a novelty in its time. Even those few digital seven segment plasma (not LEDs!) displays (time to dest, inertial nav system and some indicators) and the RCA navigation land radar screens are just wonderful. I would love to see those in full operation.

Direct link | Posted on Sep 29, 2014 at 22:54 UTC
On Inside RA001: World's first Boeing 747 'Jumbo Jet' article (127 comments in total)
In reply to:

Don Colbert: I've sat in that flightdeck with the old three man crew hundreds of times during my troubleshooting career at Boeing. Now it's all glass and the P4 to the right is gone.

I'm not sure whether touchscreens are actually used or not, basically screen soiling is a problem that is further aggravated with touch sensitive displays.

I would say not used in commercial or military aircrafts; pad or trackball soft pointer based control, display side function buttons and actual dedicated physical manipulators are the best way for human to flight system interaction.

Direct link | Posted on Sep 29, 2014 at 21:58 UTC
On Inside RA001: World's first Boeing 747 'Jumbo Jet' article (127 comments in total)
In reply to:

Chuck Lantz: I noticed a couple of interesting bits; ... an ashtray at the engineers station, and a panel where "gauge" is spelled "guage." Kinda makes me wonder what else they got wrong in all those goodies.

@mick232
Only if he or she is on rehab, and on stable NRT… Let's not get into this, not here, shall we?

Direct link | Posted on Sep 29, 2014 at 12:36 UTC
On Inside RA001: World's first Boeing 747 'Jumbo Jet' article (127 comments in total)
In reply to:

Chuck Lantz: I noticed a couple of interesting bits; ... an ashtray at the engineers station, and a panel where "gauge" is spelled "guage." Kinda makes me wonder what else they got wrong in all those goodies.

Yeah, it's so easy to forget how prevalent tobacco use has been in the 20th century. Luckily, nowadays we know better and are better too.

Direct link | Posted on Sep 29, 2014 at 12:29 UTC
In reply to:

AlexBakerPhotoz: I totally gave up on stock photography sales and any commercial photography and now only do Fine Art work, my true love anyway. I do maintain a website and enjoy having it as a portfolio but know full well that internet sales are a pipe dream. Steal my work at alexbakerphotoz.com

@AlexBakerPhotoz
Enjoying Your Art was definitely worth my time! And while not stealing your images as binaries, I shall take time to absorb your ideas and technique to improve my creative process; you are that good. Therefore your willingness to share is an honourable thing.

What comes to Mr KJ Boorman's observations (to put it politely) on how operational environment has changed after the advent of the internet. We all need to adjust and evolve, developing new concepts for creating interest and sales. I would say that stubborn (jealous) guarding of copyright is more of counter productive than giving some leash to people for fair use.

Of course, people should learn good etiquette how to conduct fair use in the first place, always proper citation with linking to the place of origin. Mutual respect should turn to altruistic good and advance photography as an easily approachable art form.

Direct link | Posted on Jul 26, 2014 at 19:03 UTC
In reply to:

T3: So whatever happened to all those yahoos who believed that the key to better high ISO performance was MORE pixels and HIGHER pixel density?

@ new boyz

Phantom Flex4K can do 1000 fps while D4 is 11 fps; speed is not the main factor here. The balance between different qualities is and Nikon obviously chose emphasis on high sensitivity.

Direct link | Posted on Apr 7, 2014 at 14:48 UTC
In reply to:

T3: So whatever happened to all those yahoos who believed that the key to better high ISO performance was MORE pixels and HIGHER pixel density?

@ Almeida
All things are never equal with practical sensor design; it's all about trade-offs and compromises poised by manufacturing process. Therefore e.g. Sony and Canon chose lower pixel density. Btw. RX10 has more pixels and also uses all of them for video, likely Sony had some room when making design decisions and went after maximal sensitivity.

Direct link | Posted on Apr 6, 2014 at 23:34 UTC
On Samsung explains the Galaxy S5's ISOCELL sensor post (49 comments in total)
In reply to:

ybizzle: Not bad but still ways to go. Funny the Nokia 808 was released in 2012. Two years later and no one has still managed to catch up...

@RKGoth
Good joke, but badly worn-out as such. That simply is not true to any extent, Nokia's design and HW have always been a strong point and Symbian Belle is very good in everything including user experience. Its worst shortcoming was to be two years late on market; the window of opportunity was already closing.

Direct link | Posted on Mar 15, 2014 at 23:04 UTC
On Stunning 360-degree view from One World Trade Center article (70 comments in total)
In reply to:

Vergilius: My heart was in my throat watching them climb that last segment! This was an imaginative and well-executed project. Congratulations!

Ok, if you liked that gut twisting feeling then you might also want to watch this one and enjoy the scenery...

http://www.youtube.com/watch?v=gLDYtH1RH-U

The second tallest building on sight is "only" half a kilometre high!

Direct link | Posted on Mar 11, 2014 at 00:46 UTC
On Canon shows off new PowerShot N100 'Story Camera' article (163 comments in total)
In reply to:

peevee1: N stands for "Narcissist".

LIKE is all we do in this fantastic world of controlled social media extravaganza, or was it actually virtual deep licking? This era will be remembered as the time of bloated psychological self-images amplified by social exhibitionism.

Direct link | Posted on Jan 6, 2014 at 23:33 UTC
On Canon shows off new PowerShot N100 'Story Camera' article (163 comments in total)
In reply to:

mpgxsvcd: Is this a joke?

I'm speechless, so have to make a quote:

Cazwell - No Selfie Control
http://www.youtube.com/watch?v=opHxCnQfa44

Direct link | Posted on Jan 6, 2014 at 16:52 UTC
On Hands-on with the Panono panoramic ball camera post (112 comments in total)
In reply to:

Sam Rohn: ricoh already has a one shot camera that produces 360°x180° full spherical panoramas available for sale since october 2013, the ricoh theta

https://theta360.com

overall, ricoh theta has better image quality than panono samples, panono seems to have very bad color rendition and an odd "honeycomb" vignetting pattern caused by the array of cheap lenses, theta is also smaller, lighter, and about half the panono's estimated price

@vv50
Take a full circle and cut it perfectly into two halves with a vertical line that goes thru the centre point. The circumference of each halves represents 180° angle measured from the centre point.

Now imagine taking one of the halves and attach it to a pencil from the both ends of the half circumference (arhc), the result would look something like a letter P.

Imagine taking the pencil into your hands and rotating it with your fingers trying to keep the pencil stationary. When you rotate the pencil half a turn the attached arch will go thru every point on a surface of a half sphere, when you make a full turn that is 360° it will form a perfect sphere.

Thus 360° × 180° is the correct expression for a perfect sphere.

Direct link | Posted on Dec 28, 2013 at 18:30 UTC
On Hands-on with the Panono panoramic ball camera post (112 comments in total)
In reply to:

Virvatulet: Could be an interesting niche product for special use. But only if it had some active means, like mass gyros, to stabilize its movement (especially rotational) during flight. And accelerometer optimizing algorithms to choose the right moment for shutter release for the required exposure time.

Without those I doubt this will have any impact whatsoever; could keep one parents' garage busy though...

Even though the object shape is a ball, I guess that we could agree that the effect of drag is quite insignificant at these velocities. However, factually the free flight deceleration will be more than |1| g and acceleration less than |1| g. For a near perfect timing those need to be accounted for, as would deviation of the gravity of Earth (possibly that can be deducted or reduced from the equations, don't know for sure as I have not fooled around with it).

Direct link | Posted on Dec 28, 2013 at 02:11 UTC
On Hands-on with the Panono panoramic ball camera post (112 comments in total)
In reply to:

Virvatulet: Could be an interesting niche product for special use. But only if it had some active means, like mass gyros, to stabilize its movement (especially rotational) during flight. And accelerometer optimizing algorithms to choose the right moment for shutter release for the required exposure time.

Without those I doubt this will have any impact whatsoever; could keep one parents' garage busy though...

The key is to recognise that the trajectory apex (stall instant) lasts only for an infinitesimal moment and that required exposure will take a lot longer than it even in bright conditions. Consequently some camera movement is unavoidable, vertical and rotational movements being the major factors in this particular case.

To all intents and purposes the flight path after reaching its top height will symmetrically reverse towards ground, therefore slightest absolute vertical camera movement occurs when exposure time is distributed evenly between leading and trailing sections i.e. before the apex is reached and after it has been reached. Thus optimal shutter release moment comes always before the apex (highest point, top height etc. – you name it) is reached.

Direct link | Posted on Dec 27, 2013 at 20:17 UTC
On Hands-on with the Panono panoramic ball camera post (112 comments in total)
In reply to:

Virvatulet: Could be an interesting niche product for special use. But only if it had some active means, like mass gyros, to stabilize its movement (especially rotational) during flight. And accelerometer optimizing algorithms to choose the right moment for shutter release for the required exposure time.

Without those I doubt this will have any impact whatsoever; could keep one parents' garage busy though...

@leno
Well, it says in the article “throw it in the air in which case the accelerometer triggers the camera at the highest point”, so interpreting it to the letter that would mean the shutter release moment is NOT optimised for minimal movement during exposure.

There might be inaccuracies in the description as is common with short popularised technical articles, but since that would be the least ambitious way of doing it and the product is foremost about marketing with buzzwords like Cloud…

The question is not indifferent by no means, for the virtually same amount of motion blur twice the exposure time (or half less motion blur with the same exposure time) is achievable by using advanced control scheme as I suggested. That 1 EV difference makes or breaks image quality for low light e.g. indoor photography.

Direct link | Posted on Dec 27, 2013 at 13:47 UTC
On Hands-on with the Panono panoramic ball camera post (112 comments in total)
In reply to:

Virvatulet: Could be an interesting niche product for special use. But only if it had some active means, like mass gyros, to stabilize its movement (especially rotational) during flight. And accelerometer optimizing algorithms to choose the right moment for shutter release for the required exposure time.

Without those I doubt this will have any impact whatsoever; could keep one parents' garage busy though...

Ok. That would mean that the shutter control algorithm determines autoexposure suitably before the ball flight trajectory reaches its end-height, and in order to minimise movement during exposure the shutter release moment is timed so that half of the exposure happens just before the stall moment (end-height) and the other half after it.

If they really have been this thorough and mathematically modelled the cam-ball flight feeding real-time accelerometer flight data to the mathematical model, and not simply determining when the stall moment has been reached for releasing the shutter, then I'm quite impressed indeed.

Direct link | Posted on Dec 26, 2013 at 21:41 UTC
Total: 56, showing: 1 – 20
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