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Thomas Paine

To argue with a person who has renounced the use of reason is like administering medicine to the dead.

Friday, October 1, 2010

1 October - Science & Search

IBEX All Sky Map - Something Unexpected at the...Image by NASA Goddard Photo and Video via Flickr

Knot in the Ribbon at the Edge of the Solar System 'Unties'

Researchers believe the ribbon, first revealed in maps produced by NASA's Interstellar Boundary Explorer (IBEX) spacecraft, forms in response to interactions between interstellar space and the heliosphere, the protective bubble in which the Earth and other planets reside.

"What we're seeing is the knot pull apart as it spreads across a region of the ribbon," says Dr. David J. McComas, IBEX principal investigator and an assistant vice president at Southwest Research Institute in San Antonio. "To this day the science team can't agree on exactly what causes the knot or the ribbon, but by comparing different sky maps we find the surprising result that the region is changing over relatively short time periods. Now we have to figure out why." 

 

Galactic Magnetic Fields May Control Boundaries Of Our Solar System


A "solar wind" of charged particles continuously travels at supersonic speeds away from the Sun in all directions. This solar wind inflates a giant bubble in interstellar space called the heliosphere — the region of space dominated by the Sun's influence in which the Earth and other planets reside. As the solar wind travels outward, it sweeps up newly formed "pickup ions," which arise from the ionization of neutral particles drifting in from interstellar space. IBEX measures energetic neutral atoms (ENAs) traveling at speeds of roughly half a million to two and a half million miles per hour. These ENAs are produced from the solar wind and pick-up ions in the boundary region between the heliosphere and the local interstellar medium.
The IBEX mission just completed the first global maps of these protective layers called the heliosphere through a new technique that uses neutral atoms like light to image the interactions between electrically charged and neutral atoms at the distant reaches of our Sun's influence, far beyond the most distant planets. It is here that the solar wind, which continually emanates from the Sun at millions of miles per hour, slams into the magnetized medium of charged particles, atoms and dust that pervades the galaxy and is diverted around the system. The interaction between the solar wind and the medium of our galaxy creates a complex host of interactions, which has long fascinated scientists, and is thought to shield the majority of harmful galactic radiation that reaches Earth and fills the solar system.




California to enter fourth month without budget

 



Russian firm unveils plan for first space hotel

 

Ecuador's police chief quits over Correa crisis

 Ecuador's police chief has stepped down after failing to stop a rebellion by officers who attacked President Rafael Correa and trapped him inside a hospital until troops rescued him in the worst crisis of his rule.

Sparkling Drinks Spark Pain Circuits: Fizzy Beverages Light Up Same Pain Sensors as Mustard and Horseradish

Carbonation evokes two distinct sensations. It makes things sour and it also makes them burn.

The 4GB Windows Memory Limit: What does it really mean?
http://www.brianmadden.com/blogs/brianmadden/archive/2004/02/19/the-4gb-windows-memory-limit-what-does-it-really-mean.aspx

 

( Extracts from discussions about Terminal Servers only : host website parameters. Some back-and-forth contests and/or expands upon these extracts. Noted because of a discussion at My Hiding Place where Dr. John v. Kampen is explaining constraints using his new 64-bit system which has software support deficiencies...so that he risks constraint to 32-bit programs which actually work....in less exotic hardware environments.  )



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

By definition, a 32-bit processor uses 32 bits to refer to the location of each byte of memory. 2^32 = 4.2 billion, which means a memory address that's 32 bits long can only refer to 4.2 billion unique locations (i.e. 4 GB).  

This 4GB space is evenly divided into two parts, with 2GB dedicated for kernel usage, and 2GB left for application usage. Each application gets its own 2GB, but all applications have to share the same 2GB kernel space. 

Systems booted /PAE can support up to 64GB physical memory. A 32-bit process can "use" large amounts of memory via AWE (address windowing extension) functions. This means that they must map views of the physical memory they allocate into their 2GB virtual address space. Essentially, they can only use 2GB of memory at a time.

Guest  Although it does not influence the rest of the article, the statement that 32 bit CPU means 32 addressbits is incorrect:

By definition, a 32-bit processor uses 32 bits to refer to the location of each byte of memory

The 32 bit refers to the with of the CPU internal DATA bus and registers and not to the width of the ADDRESS bus. This has always be the case. Go back in history: the Z80 is an 8 bit CPU, but has 16 address bits (so 64 KB of memory). The 8086 is an 16 bits CPU, but has 20 addressbits (so 1 MB of memory). The 80286 is also an 16 bit CPU, but with 24 addressbits (so 16 MB of memory).

 

Gunmen Torch NATO Tankers in Pakistan

Officials say a group of gunmen opened fire Friday, forcing people to flee before setting 27 tankers on fire in the southern town of Shikarpur.  The vehicles were on their way to Afghanistan from the southern port city of Karachi.  Police later arrested around 10 suspects.

Authorities shut the border crossing Thursday, after Pakistan's military said NATO helicopters attacked a paramilitary checkpoint in the northwestern Kurram region, killing three soldiers.

It was the fourth cross-border raid in recent days.

Pakistan's ambassador to Belgium lodged a formal protest against the border incursions with NATO leaders on Friday. 

And Pakistani Prime Minister Yousuf Raza Gilani told Parliament Friday that Pakistan will not tolerate an attack on Pakistani soil.  He says the country will  "consider other options" if its sovereignty is violated.

NATO said its helicopters entered Pakistani airspace on Thursday and hit a target only after receiving ground fire. The alliance expressed condolences to the families of the Pakistani soldiers and said it would investigate the incident.
 

 

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 ( I don't usually flog Toolbars, believing them a trap with Malware and Advertising which take up viewing area. So I kill the display in  View unless I think I might use it. My only bitch with Diigo is the Go Premium! button.

'Read Later' is handy. It allows me to note a page without being locked into having it 'Live' and eating up available resources. Since it goes into a locked Bookmark private file online, I can access it from any computer or Operating System via any Browser, even if Tools or Toolbar aren't installed.

I tend to blog Articles...and Bookmark Sources. Hopefully the Bookmarks Tagfile and Search functions on this blog help find particular articles.

Notable Tools in FF on the 'new' 1800+ are Zemanta. LastPass, Similar Web { basically untested by me yet as I have always used StumbleUpon...somewhat},Web of Trust  and Shareaholic. )


 
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