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USB Reversable Cable Images Emerge

jcdr Re:Power delivery is good at data transmission. (208 comments)

I remember having build and used perfectly working small RF transmission devices with 27 MHz frequency. There never required a 3.5 or 14 meter long antenna !

about two weeks ago
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USB Reversable Cable Images Emerge

jcdr Power delivery is good at data transmission. (208 comments)

From page 18 of this document: https://intel.activeevents.com...

"The PD communication channel is an RF system:
- 23.2 MHz DFSK with a nominal deviation of 500kHz"

So the VBUS/GND pair alone can be enough to transmit data than USB LS (1 Mbps) and USB FS (12 Mbps). I see this a a very interesting solution: a standard to deliver negotiated power and mid range data rate using only 2 wires. If only the USB PD will allow a broadcast topology, I see a lot of possible applications...

The frequency of the power delivery is so high that an antenna could maybe be enough to transmit wireless data, without power. LOL

about two weeks ago
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USB Reversable Cable Images Emerge

jcdr Re:Reversible (208 comments)

The same document in page 14 limits the 60W and 100W profiles to the A and B type. So the C type is probably limited to 36W.
 

about two weeks ago
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Author Says It's Time To Stop Glorifying Hackers

jcdr Only NSA can do that ! (479 comments)

All others have to be quiet naive idiots ?

about a month ago
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The Rise and Fall of Supersymmetry

jcdr Re:is there an xkcd comic for this? (138 comments)

Look like xkcd is as reliable as the LHC on this subject: no Supersymmetry...

about a month and a half ago
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Bug In the GnuTLS Library Leaves Many OSs and Apps At Risk

jcdr Re:Concur. (231 comments)

Sorry, you don't use the right command to see the reverse dependencies.

Try this:
apt-cache rdepends libgnutls26

I will not post the result here, because it's 494 lines long on my system:

apt-cache rdepends libgnutls26 | wc -l
494

about a month and a half ago
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Stack Overflow Could Explain Toyota Vehicles' Unintended Acceleration

jcdr Re:This is a case of manual override (664 comments)

Actually the brakes alone are enough to stop the car even in case of a full throttle bug.

about 2 months ago
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Background Javascript Compilation Boosts Chrome Performance

jcdr Re:In node.js too ? (136 comments)

I don't pretend that Nodejs is comparable to Tomcat or similar options. I just noted that restarting on an uncaught exception, while not included in the Nodejs environment, is technically nothing special in Javascript virtual machine compared to others language. I have do that with a manager application or script in many projects. I will probably try to use systemd to do that in the future.

about 2 months ago
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Background Javascript Compilation Boosts Chrome Performance

jcdr Re:In node.js too ? (136 comments)

Agree on that. Replace it by Javascript virtual machine in my previous text.
This is the same relation than with Java and his virtual machines implementations:
http://en.wikipedia.org/wiki/L...

about 2 months ago
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Background Javascript Compilation Boosts Chrome Performance

jcdr Re:In node.js too ? (136 comments)

... restart the service.

Yes, there is many ways to restart an application that died on a fatal uncaught exception. Again this is nothing specific to a language.

about 2 months ago
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Background Javascript Compilation Boosts Chrome Performance

jcdr Re:In node.js too ? (136 comments)

I suppose that it's possible to find the same opinion for any language. Actually it seem that Node.js raise in popularity.

Personally, I use it with Qooxdoo, and I found it a more effective solution that PHP for example. Having the same language in the server side and in the client side make the whole thing more coherent and simpler to maintain. I now experiment it for it portability across platforms to control a testing device from a browser.

about 2 months ago
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Background Javascript Compilation Boosts Chrome Performance

jcdr Re:In node.js too ? (136 comments)

AFAIK, uncaught exception is fatal in any language.

about 2 months ago
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Background Javascript Compilation Boosts Chrome Performance

jcdr Re:In node.js too ? (136 comments)

While I agree that node.js don't have a UI, it still have to balance the time passed to compile and the time passed to execute. AFAIK, node.js use a single thread loop for the execution and probably for the compilation too. I think that dispatching the compilation to a second thread could reduce the latency of the execution thread.

about 2 months ago
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Background Javascript Compilation Boosts Chrome Performance

jcdr In node.js too ? (136 comments)

Maybe in a future revision. This would bee great !

about 2 months ago
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LLVM & GCC Compiler Developers To Begin Collaborating

jcdr I hope that many others projects will do the same (279 comments)

Good move.

While forking is a necessary fact to develop a new idea (even into the original community), merging (at lead idea) is even more necessary long term consequence to avoid fragmentation. The most dangerous thing for open source communities is to start to see others projects and communities as futile and without interesting for learning something.

Desktop related projects should really start to go into that direction now.

about 2 months ago
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Slashdot Tries Something New; Audience Responds!

jcdr Lost in the comments ocean (2219 comments)

An this one is a perfect example: Can anyone get a clear picture of a >1500 comments story ? Probably not, or at least for the vast majority.
The actual system is limited by the fact that is very hard to attach a personal contribution into the flow of comments. So, similar idea are expressed many times with little difference. I am not saying that the little difference should go away, but there can be attached the the common idea.
The simplest way I can imagine to start implementing something is that direction, is to let move the comments into a graph, instead of a hierarchical historical flow. Typically a comment tend to develop the parent idea in either "it's true" or "it's false" relation: the graph should show that. There is certainly a lot of useful relations to the parent to add in practice. Sometime the relation is related only a a part of the parent comment.

about 2 months ago
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HTML5 App For Panasonic TVs Rejected - JQuery Is a "Hack"

jcdr Re:Quite possibly indeed! But still... FUCK BETA! (573 comments)

Fully agree. Every single time there asked my view of the beta I tell them that is a hug vast of time for them and a hug vast of screen space for me. Uniform white pixels yield no information to me and force to scroll a lot more than with the classic interface. There wast the horizontal space by cutting them. There vast the vertical space with a top menu and insane high interline and bigger fonts. Finally there lost the "personality" of the Slashdot look by replacing it by a fade look that is like a newbie site.

There would be a lot or more creative ways to improve Slashdot, like finding a way to sort and assemble a graph of the expressed view across all comments of a story. This is hard, yes. But something like this can be a way to compile the comments of a story into something that look like a draft of a article on the story, making the whole thing simpler to read and to contribute. Uhmm... Ok, I will stop dreaming and weak up.

about 2 months ago
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Gnome 3.12 Delayed To Sync With Wayland Release

jcdr Re:Gnome 3 unusable? (204 comments)

Virtual desktop work fine for my in Gnome 2. I use a 8x8 grid with 1 to 4 windows each, so the task bar is never full. I use the windows menu applet to find the exact window I want across all the desktops. I use the same setting with XFCE and with MATE. This config is efficient, coherent and really fast.

Under Gnome 3 or Unity, managing a static grid is a problem. Because the desktop management is too dynamic, every desktop can change it position relative to the other. This is a nightmare ! Imagine a 64 apartments basement where every apartments change his position relative to the others. You lose any ability to navigate quickly with a map in your brain. I found the right stack of desktop view helpless compared to a static grid. Using multiple windows application with Gnome 3 is hard because it tend to center every special windows in the middle of the screen. Unity is even more crappy because the common top menu bar change his context every time you pass over a window with sloppy focus enabled (click to focus is terrible). For both the desktop and window switching is far to slow, the right desktop and the right window is hard to find. Really a step back in term of productivity.

about 2 months ago
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Gnome 3.12 Delayed To Sync With Wayland Release

jcdr Re:They can delay Gnome3 as much as they want (204 comments)

I agree with your view.
I think that MATE is not the cause of the "shiny new thing", but the fact that Gnome 2 was abandoned by the Gnome Foundation. This is also why the name "Gnome" can't be used anymore for the fork.

The very interesting thing is that MATE project will soon support all the new cool technologies like GTK+3, Wayland and systemd (like Gnome 3) but without changing the desktop experience for the users (unlike Gnome 3).

about 2 months ago

Submissions

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Will Microsoft IIS overtake Apache web server ?

jcdr jcdr writes  |  about 3 months ago

jcdr (178250) writes "February 2014 Web Server Survey by Netcraft show a massive increase of Microsoft web server since 2013. Microsoft's market share is now only 5.4 percentage points lower than Apache's, which is the closest it has ever been. If recent trends continue, Microsoft could overtake Apache within the next few months, ending Apache's 17+ year reign as the most common web server."
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Which phone has a USB powered host mode ?

jcdr jcdr writes  |  about 4 years ago

jcdr (178250) writes "More and more mobile phones have a USB port capable of operating in host mode. But very few of them are capable of powering a USB device by themselves, without using another power source. The problem is complicated by the fact that manufacturers rarely provide the exact specification of the USB host mode. This makes it not easy to find a phone that can power a device, and buying all the possible candidates would be extremely expensive, not including the time for testing. I'm looking for experiments to find out which mobile phones currently available for sale have been shown capable of powering a USB device that consumes less than 100mA current."

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