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US Scientists Predict Long Battle Against Ebola

geantvert Re:+-2000 deaths? (119 comments)

The doubling time looks like 30 to me (1000 at 110 and 2000 at 140)
According to the given formula e^(0.022x+4.591) it is actually log(2)/0.022 = 31.5
e^(0.022*0+4.591) = 98
e^(0.022*31.5+4.591) = 197
e^(0.022*63+4.591) = 394
e^(0.022*94.5+4.591) = 788 ...

about two weeks ago

US Scientists Predict Long Battle Against Ebola

geantvert Re:+-2000 deaths? (119 comments)

There is no such thing as nuclear cauterization except in movies and video games.
A nuclear attack in a densely populated area would just destroy the medical infrastruture and would create thousands or millions of survivors most of them affected by radiations and so with a weakened immune system. The pandemic would spread very fast.

about two weeks ago

Apparent Meteorite Hits Managua, Nicaragua, Leaving Crater But No Injuries

geantvert The real question is... (107 comments)

... are Adam Savage and Jamie Hyneman in holiday in Nicaragua?

about two weeks ago

No Black Hole Or Magnetic Monopole: Tunguska Really Was a Meteor

geantvert Discussion is over (128 comments)

Godwin! I saw it first! What did I win?

about a year ago

Open Sauce Foundation Created

geantvert Rnfl (95 comments)

Yvahk/Havk hfref pna hfr gur sbyybjvat pbzznaq gb qrpbqr/rapbqr ebg13
ge n-mN-M a-mn-zA-MN-Z

about a year and a half ago

Schmidt Testifies Android Did Not Use Sun's IP

geantvert Re:"Clean Room" implementation (239 comments)

Humm... If the purpose of that function is to check that the interval fromIndex:toIndex is valid within an array on length arrayLen then there is another sensible way to implement that function.... without a bug:

    This code does not throw ArrayIndexOutOfBoundsException if toIndex == arrayLen

more than 2 years ago

Saving Gas Via Underpowered Death Traps

geantvert Please remind me ... (585 comments)

... what is the estimated number of deaths caused by pollution in the USA alone? and worldwide?


more than 3 years ago

Is Free Software Ready For E-publishing?

geantvert Re:Boycotting? Hardly (221 comments)

The link to the Richard Stallman page is not against ebooks but about Amazon ebooks, or to keep it simple about DRM, proprietary formats and all other nice features introduced to "protect" users

There is nothing wrong with open ebook formats such as EPUB (XHTML+CSS+XML) as they remain DRM free.


more than 3 years ago

Bio-Detector Scans For 3,000 Viruses and Bacteria

geantvert Does that mean ... (103 comments)

... the end of Dr House?


more than 4 years ago

Vatican Chooses Open FITS Image Format

geantvert Re:Image size? (223 comments)

Let's assume
    - an average page is 10x10 inches (25x25 cm)
    - a high scan resolution of 1200DPI
    - 32bits per pixel (4bytes)

An average uncompressed page takes 10*10*1200*1200*4 = 576000000 = 0.57 gigabytes

A lossless compression can probably reduce the size by 2 but if they are not stupid they will make multiple backups so 1.2 gigabytes per page seems reasonable to me.

more than 4 years ago

Adding Some Spice To *nix Shell Scripts

geantvert Re:I only write trivial shell scripts (411 comments)

case "$filename" in
    *.temp|*.tmp|*.junk) echo "good $filename" ;;
    *) echo "bad $filename" ;;

more than 4 years ago

Low-Energy Laser Etching May Replace Fruit Labels

geantvert Re:Lecture Fruit! (475 comments)

You forgot coconuts that can be deadly when received on the head.

There is also that well known story of a couple having huge problems after eating a single apple!

more than 4 years ago

Contest To Hack Brazilian Voting Machines

geantvert Re:why is electronic voting so hard? (101 comments)

A huge problems with the flat log file is that it breaks the secrecy. If you know the order of the voters you can easily figure out who voted what.

A better solution could be to print or select a ballot paper and have it sent into a ballot box after visual verification by the voter.

more than 4 years ago

Intel Pulls SSD Firmware Day After Release

geantvert Re:Smart Machines (125 comments)

Humm... wear leveling in software ... wait until an OS misconfiguration, an OS bug or a virus ruins your SSD by writing thousand of times the same sector. I am not talking about losing your precious data which should be backuped but losing the whole disk. And don't even think about using the warranty. SSD makers are not suicidal. The first thing they would had to their product is a counter of writes per block in order to prove that the failure was not their fault.


more than 4 years ago

Analyzing Microsoft's Linux Lawsuit

geantvert Re:The enemy of my enemy . . . (297 comments)

I don't agree! During the last years Tom Tom attitude was more and more against the OSS community so the OSS community should not help Tom Tom.

I have not tried recently but as far as I know it is virtually impossible to download and install a map on a TomTom without their Windows-only application. And please don't tell me that they have good technicals reasons since that was perfectly possible a few years ago.

I don't say that the community should be silent. It would be far more productive to use this as an opportunity to express a strong dissatisfaction against parasitic companies that take as much as possible without even giving the most basic OSS support for their products.

more than 5 years ago

High Performance Linux Kernel Project — LinuxDNA

geantvert Re:40% faster kernel, but what overall performance (173 comments)

That's a common misconception but malloc is not a kernel call but a user land function.

Malloc is implemented in the libc by managing a since large area of memory (the heap). When the heap is full, malloc() increases the heap size by a system call such as sbrk(). On my system (64bit), the heap is increased by blocks of 128KB.

For large data sizes (>128KB) malloc does not use the heap and directly allocates the memory using the system call mmap().

For example, for an application allocation up 100MB the overall number of calls to sbrk() is no more than 100MB/128KB = 800 regardless of the number of calls to malloc()/free() which can be millions. The kernel calls are totally negligible.

There is a nice article here:


more than 5 years ago

Malware Threat To GNOME and KDE

geantvert Re:Not really news... (348 comments)

The first problem is indeed that a desktop file does not require the executable bit to be executed (from Nautilus) by double-clicking it.

The second problem is that the file content specifies it icon, name and tooltip regardless of the filename of the desktop file.

For example, a very efficient way to fool people could be to disguise the desktop file into one of the default icons of the desktop (Trash, Computer, Home, ...)

For the virus writer the only problem is to get the desktop file to be saved in the Desktop directory.

Humm... Guess what is the default directory of most applications for saving uploaded files? I give you an hint. The name starts by a 'D'.

Even better, it is possible to specify that the Desktop is the HOME. I haven't checked recently but that I remember that this used to be the default in Ubuntu.

My advice is simple: Start gconf-editor and disable the configuration key /apps/nautilus/preferences/show_desktop to get rid of all desktop icons.

more than 5 years ago

Toshiba To Launch First 512GB Solid State Drive

geantvert Not for SSDs (256 comments)

Those filesystems are designed for FLASH devices like usb keys or memory cards but are probably not suitable for SSD.

The reason being that modern SSDs already perform wear leveling to improve the performances and I don't believe that apply wear leveling could be a good idea.

For the time being, it is probably better to wait for the SSD controller technology to mature.

On the OS, the existing filesystems should be tuned to exploit the lower seek times. Caching the writes so that they can be perform in large consecutive blocks probably make sense too.

more than 5 years ago


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