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Comments

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Graphene-Based Image Sensor To Enhance Low-Light Photography

asvravi Re:1000 times better? (103 comments)

First off, if we cut through the usual dismal quality of scientific reporting, what they made is a photodetector, not an image sensor. It detects single events rather than capture an image. The sensitivity of the detector is not the same as quantum efficiency. The sensitivity they mention here includes a "photogain" by virtue of the detector operating more or less as a light-controlled amplifier. It takes electrical input energy and simply amplifies it based on incident light. That can create a flow of many more electrons than incident photons. The same thing can possibly be also done by introducing a gain in the conventional image sensor electronics too, but having this photogain right inside the sensor should theoretically lead to better noise performance. So we would expect the paper to quantify the noise characteristics, but it is woefully sparse on the noise details - which leads me to suspect this is yet another "invention" that is never going to see the light of day.

about 10 months ago
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Indian Gov't Bans Bulk SMS, Investigating Social Media

asvravi Re:And... (101 comments)

Sanest comment on this post yet! Wonder why it is not marked +5 insightful yet..

about a year ago
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Monsanto May Have To Repay 10 Years of GM Soya Royalties In Brazil

asvravi Re:Remove the yoke of Monsanto! (377 comments)

Wrong on the India farmers bit. Here is an extract from a Wikipedia article -

There have been claims of genetically-modified (GM) seeds (such as Bt cotton) being responsible for the farmer suicides.[25][26][27][28] A short documentary by Frontline (U.S. TV series) suggested that farmers using GM seeds promoted by Cargill and Monsanto have led to rising debts and forced some into the equivalent of indentured servitude to the moneylenders.[29]
A report released by the International Food Policy Research Institute in October 2008 provided evidence that the introduction of Bt cotton was not a major factor in farmer suicides in India.[30] It argues that the suicides predate the introduction of the cotton in 2002 and has been fairly consistent since 1997.[30][31] Other studies also suggest the increase in farmer suicides is due to a combination of various socio-economic factors.[32] These include debt, the difficulty of farming semi-arid regions, poor agricultural income, absence of alternative income opportunities, the downturn in the urban economy forcing non-farmers into farming, and the absence of suitable counseling services.[32][33]

about 2 years ago
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The Dutch Repair Cafe Versus the Throwaway Society

asvravi Ignore (368 comments)

Posting to remove unintentional mod.

about 2 years ago
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Ask Slashdot: How to Exploit Post-Cataract Ultraviolet Vision?

asvravi Re:Dangerous (350 comments)

No they aren't safe. In the case of sunlight, eyes see it pretty strongly and the pupils contract to cut down the amount of light that strikes the retina thus protecting it. In case of UV, there is a chance he may not see a part of the spectrum so his pupils remain dilated letting in dangerous amounts of UV light. Same reason it is advised to never look at an eclipse with unprotected eyes.

more than 2 years ago
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Mozilla Lightning Calendar Nears 1.0

asvravi Re:freezes for several seconds (69 comments)

Syncs in background for me, I dont have this issue. If it happens only when you are writing an email, then you probably configured your drafts to be saved to a (slow) IMAP folder?

more than 2 years ago
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Smartphones: the New Home of Crapware

asvravi Re:2 Words (308 comments)

Still waiting for the second word...

more than 2 years ago
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Dismantling a Nuclear Reactor

asvravi Re:In this thread... (102 comments)

Why isn't this in Ask Slashdot section??

more than 2 years ago
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Understanding the Payoffs From Investing In Space Flight

asvravi Re:Intel didn't start until 1968 (264 comments)

Space programs do not drive the fundamental tech needed for smartphones - they may contribute to advancing ruggedness and reliability of electronics, but never miniaturization or cost reduction. NASA would prefer to use a tried and tested FPGA that is 20 years old, in a 1um radiation hardened process, rather than the latest 40nm Nvdia/Qualcomm processors, leave alone driving their development.

more than 2 years ago
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Google+ Runs Out of Disk Space, Swamps Users With Notifications

asvravi Re:Google+ (321 comments)

You sure do not have an account, or, what is it that you are smoking? There is a prominent checkbox to opt out of data collection for targeted advertising right on the initial login form, even before starting to signing up for Google+. They also display your profile settings for the first time after signing up, where you get a chance to change anything you want before it goes live.

Somebody please mod this FB shill a troll...

more than 2 years ago
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Ask Slashdot: Open Patent Licenses?

asvravi Publish? (96 comments)

So why not just publish it, making it prior art? Or maybe what you want are Trade Secrets?

more than 2 years ago
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Microsoft Brands WebGL a 'Harmful' Technology

asvravi Re:Microsoft should know... (503 comments)

I agree. MS has become increasingly security savvy to protect their main business - the OS and the Office applications that go on it. The Vista/Win7 permissions model, MS Anti-malware updates, MS Security Essentials, Driver signing, bug bounties, are all examples of MS efforts to up the security. These comments are along expected lines from MS in this age. (And no, I use more Linux than Windows, but credit to be given where credit is due).

more than 2 years ago
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China Building World's Biggest Radio Telescope

asvravi Re:It's been awhile since astro classes, but... (121 comments)

Photons? For a RADIO telescope?? Yes, quite a while since your astro classes.

The SNR you quote, which improves as square root of the collected radiation (radio waves), is voltage SNR. In terms of power, you still get a 9dB SNR improvement for 3 times the collected radio waves, and in these electronics, it is electric power which is the ultimately used. However, the improvement factor should again be raised to power 1/3 to get distance, since the amount of signal power collected by an aperture, after spherical dispersion from a star, drops as the third power of the star's distance. So.. (25/9)^(1/3) = 1.4 times.

more than 2 years ago
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Ubuntu 11.04, Slackware 13.37

asvravi Re:Who else is waiting for the "got yah" of Unity? (266 comments)

What should be the absolute heart of slashdot, two new releases of Linux, sporting different styles, is getting some 30 posts for BOTH distros combined,

Everybody else is busy writing up the story to submit.

more than 2 years ago
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GPS Maker TomTom Submits Your Speed Data To Police

asvravi Re:For Sale GPS Device (422 comments)

Suggestion: stow it on board the nearest fighter jet.

more than 2 years ago
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Police Using Apple iOS Tracking Data For Forensics

asvravi Re:From (one of the) TFAs (208 comments)

Apple had acknowledged to Congress last year only that "cell tower and Wi-Fi access point information" is "intermittently" collected and "transmitted to Apple" every 12 hours.

Citation? I don't doubt you, but just because you type it does not make it true. Especially in the auspices of someone who decries fanboi-ism, I'd expect to see an avoision of even the appearance of impropriety in fact-reporting.

It is supposed to happen only if location based services is toggled on and an app that requires location data is running. http://www.wired.com/images_blogs/gadgetlab/2011/04/applemarkeybarton7-12-10.pdf , Page 7.

more than 2 years ago
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Google Tweaks Algorithm; EHow Traffic Plummets

asvravi Re:Hit me badly too (286 comments)

Here is a post from his site dated Sep 23rd 2010 - Rogues, rapscallions and rascals Thursday September 23, 2010 Carfolio.com has been collecting and collating automotive technical data for many years, before actually having a website or even an internet-connected computer. Realising that there would be interest in this database, I decided to put my data up online in a very useful and functional way. It has always and will always be free for anyone to utilise. Some people, however, have decided to crawl the site and put all the data into their own database and resell and republish the information without attribution, credit or acknowledgement. Some go as far as to add 10mm to the basic dimensions so as to try and disguise their actions... I find that extremely bizarre, as part of the whole idea behind Carfolio.com is to get as many errors found and corrected as possible, and to that end I have always encouraged feedback and dialogue about the specifications. Factual errors are always corrected if sufficient sources are supplied. So as to ensure the best possible quality of data for Carfolio.com users, here is a list of the sites currently known to be using the data without attribution. I will not give them a link, of course, as that will unduly increase their search engine ranking. autofiles dot org carspector dot com data4car dot com carocean dot co dot uk (and de, es, pl, it, fr) scorpiocars dot net ukmotorist dot co dot uk getcarspecs dot com Please be wary of the data from these sites as they are definitely not updated and almost certainly have introduced additional errors when crawling or attempting to obfuscate the source of the data.

more than 2 years ago

Submissions

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New android trojan horse

asvravi asvravi writes  |  more than 3 years ago

asvravi writes "There has been something of a sting in the tail of the year for lovers of the Android mobile operating system, as researchers (http://blog.mylookout.com/2010/12/geinimi_trojan/) uncovered a new Trojan horse.

The Troj/Geinimi-A malware (also known as "Gemini") has been seen incorporated into repackaged versions of various applications and games. Once the malware is installed on a user’s phone, it has the potential to receive commands from a remote server that allow the owner of that server to control the phone. The affected applications request extensive permissions over and above the set that is requested by their legitimate original versions.

The good news is that it appears not to have made it into the official Android market app store — meaning that you would only have been putting yourself at risk if you installed poisoned software from an unauthorised source."

Link to Original Source
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India SC : Narco test is human rights violation

asvravi asvravi writes  |  more than 3 years ago

asvravi writes "The Indian supreme court banned the use of involuntary Narco tests and Brain mapping techniques as an unjustified intrusion into the mental privacy of an individual and against the evolving norm of international human rights.

In a blow to investigating agencies which routinely use these methods, a three-judge bench of the supreme court held in a 251-page judgment that the involuntary administration of these three investigative tools was in direct conflict with the constitutional right against self-incrimination."

Link to Original Source

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