Lenin and Stalin was also enamored with Lysenko. This lead to the imprisonment and execution of a number of Russian geneticists.
From the wikipedia article:
"In 1948, genetics was officially declared "a bourgeois pseudoscience"; all geneticists were fired from work (some were also arrested), and all genetic research was discontinued. Nikita Khrushchev, who claimed to be an expert in agricultural science, also valued Lysenko as a great scientist, and the taboo on genetics continued (but all geneticists were released or rehabilitated posthumously). The ban was only waived in the mid 1960s."
* The Vista performance/health monitor is actually pretty good, and provides a really handy ntop-like interface for seeing which service is doing what with the network (not as fine grained as I'd like, but it's a good starting point).
You are referring to the performance monitor that appears in server manager? For some reason I can't leave that monitor running on our systems, because it slows the rest of the system down to a crawl.
I can confirm that it handles AD quite effectively, having recently set one up.
ACL support took a bit of fiddling to get setup how I wanted it, but once I got my head around the differences between the way POSIX, windows and Novell ACLs work I found it remarkably easy to operate.
The UID issue was not a problem since I am only running a single server.
I just finished a sizable essay on this for my operating systems class, so its fairly fresh in my memory.
In modern processors, there is no penalty for using virtual memory, all translation from virtual to physical address space is done internal to the processor and you won't notice the difference.
No quite - Your thinking of the Translation Lookaside Buffer, it can do the conversion from real to virtual address within a clock cycle, but has a limited capacity. When an address is requested to a page not contained in the TLB a much longer operation is required to convert the address from scratch. Further requests to that page will be fast until it drops out again.
Many CPUs can populate the TLB in hardware, but no operating system seems to use this support - doing the conversion in software. The TLB works well right up until there is a context shift that requires the entire contents to be flushed. Then memory performance will be poor until the TLB is repopulated.
A significant portion of Australians are ethnic Germans - the Barossa Valley especially was settled starting in the 1840s by a large contingent of Lutherans. Up until the first world war they formed a distinct subgroup with their own language.
Nuclear power is still a fossil fuel in that it relies on underground energy sources which are unrefined, then releases this energy via concentrated local energy plants. When the fuel is "spent" it is every bit as toxic as millions of pounds of coal, it's just easier for us to handle (sort of) and transport to storage facilities. Meanwhile the spent fuel presents a HUGE security risk and even after it has been squirreled away it is still a huge security risk that we will have to defend for at least hundreds of years.
Current generation Light Water reactors are quite inefficient from a fuel usage standpoint. A better solution may be based on the CANDU design. This has the dual advantage of cutting down on waste and making current reserves go further.
NetWare was *the* file and print server for a very long time, however I think they have made a few dodgy technical decisions in recent years - We currently use no less than *three* different administration programs - but the killer is patch management. So man patches break underlying functionality that finding a stable patchlevel is so difficult that any kind of upgrade is done with only the upmost trepidation.
Believe me I'm talking from painful experience here....
I think SGI will be the company that will helped out the most by this.
SGI makes a lot of Itanium powered boxen. They seem to have picked the itanic as their primary platform from workstations up to their big end NUMA machines - a decision that probably doesn't help their balance sheet. If HP and Intel can rustle up more interest in the platform it may even make them a serious contender again.....
I'm wondering if we have seen something similar. The rumour is that a large company was selling cheap caps to a lot of computer manufacturers that have turned out to be faulty only once they have been in service for a significant period.
We have a large number of motherboards from a number of manufacturers purchased between 2001-2004 that have bad electrolytic capacitors on them - they have a bulge in the top of the can and in some cases they have leaked outright.
This has lead to stability issues on a large number of machines and has involved quite a lot of warranty service calls. Now that we know what to look for it is routine to pop the lid of a machine and check it's state while moving or overhauling it.
Following this initial use, you agree to return the empty cartridge only to Lexmark for remanufacturing and recycling.
A few years ago I needed to replace the brake shoes on my car. It turned out that the shoes were "bonded" - I paid a deposit when I purchased the shoes that was refunded when I brought back the worn ones which were then remanufactured.
This sounds like the same kind of deal.
Sure thing.
I've realised I made a mistake however. While altitude compensation is critical for single stage to orbit designs, Spaceship two and three will launch from high altitude where the pressure is already about 1/10th of it's value at sea level. Thus altitude compensation is nowhere near as critical as in a design that runs from sea level such as DC-X, X-33 or shuttle.
Kubuntu uses the solid base of Ubuntu plus the latest KDE. We are part of the Ubuntu community and use their infrastructure and support. Our mission is to be the best KDE distribution available.
Klotho seems to delay many of the effects of old age, like the weakening of bones, clogging of the arteries and loss of muscle fitness.
This is important for those researching the causes of ageing, whose intention is not so much to prolong life as to improve the quality of our final years.
I think a distinction has to be made here between life extension and anti-aging.
from the article:
Klotho seems to delay many of the effects of old age, like the weakening of bones, clogging of the arteries and loss of muscle fitness.
This is important for those researching the causes of ageing, whose intention is not so much to prolong life as to improve the quality of our final years.
I have to agree I wouldn't want to live in a decrepit state, but staying young for longer has a definite appeal.
First off the standard disclaimer - I am not a rocket scientist....
Now perhaps SC has found an engine that will get them to orbit, who knows, but it's a bigger problem than you might think. Fuel is an issue:
the problem is not the engine - it's the nozzle. Due to the large pressure difference between the earths surface and space an engine that is optimized for one regime operates poorly in another.
There are ways around it - raise the chamber pressure like in the shuttle or use an altitude compensating nozzle like an aerospike or plug nozzle but the kinks are yet to be worked out of these approaches.
Fuels that are used in space must carry their own oxygen, but when going at high speeds in the earth's atmosphere, why not make like a jet engine and get oxygen from the atmosphere?
The general was saying, "Our goal is a simple one, gentlemen: the replacement of the computer. A ship that can navigate space without a computer on board can be constructed in one-fifth the time and at one-tenth the expense of a computer-laden ship. We could build fleets five time, ten times, as great as Deneb could if we could but eliminate the computer."
"And I see something even beyond this. It may be fantastic now, a mere dream, but in the future I see the manned missile!"
There was an instant murmur from the audience.
The general drove on. "At the present time, our chief bottleneck is the fact that missiles are limited in intelligence. The computer controlling them can only be so large, and for that reason they can meet the changing nature of antimissile defenses in a unsatisfactory way. Few missiles, if any, accomplish their goal, and missile warfare is coming to a dead end; for the enemy , fortunately as well as for ourselves.
"On the other hand, a missile with a man or two within, controlling flight by graphitics, would be lighter, more mobile, more intelligent. It would give us a lead that might well mean the margin of victory. Besides which, gentlemen, the exigencies of war compel us to remember one thing. A man is much more dispensable than a computer. Manned missiles could be launched in numbers and under circumstances that no good general would care to undertake as far as computer-directed missiles are concerned-"
He said much more but Technician Aub did not wait.
Of course this was written back in 1957 when computer equipment was far bulkier than it is now.
I blame Robert McNamara (sp?) The Dyna-Soar project was a re-usable spaceplane launched by a disposable booster. The initial version were single seat, but a version version that would carry four passengers to a projected space station in orbit (if this sounds familiar it's almost identical to the currently talked about shuttle replacement.)
After six years of development and US$660M in funding it was cancelled just after the construction of the first example had begun.
For that matter, I happen to approve of the idea of nuclear powerplants - if properly designed and with a waste management plan. So far we've done a pretty bad job of doing it properly, though. Hint - Is it REALLY smart to take a basic design type optimized for compact power in a military application, and scale it up for civillian power?
I've heard of a number of quite fail-safe reactor designs being talked about, unfortunatley I don't think any are going to go into service any time soon since there is quite strong opposition and literally miles of red tape facing anybody who wants to opena nuclear power reactor in the united states. I've heard one claim that no new civilian reactors have been built since the 70's for this reason.
Interestingly in AU the debate has kicked up quite recently with a number of politicians suggesting nuclear power and desalinisation as a solution to the current water and energy generation problems.
Something I have been pondering for a while is a fundamental difference in point of view that seems to be related to the old nature vs nurture views on people.
One point of view is that people are products of their society. In the right situation and with the right influences they become model citizens and with the wrong ones they become violent troublemakers.
The opposing viewpoint is that people are generally decent, but there will always be a few bad apples and you have to plan accordingly.
This means that from one point of view the capacity for violence in all its forms needs to be supressed lest it make things worse, and from the other it needs to be maintained but in a harnessed form.
It strikes me that the reason these debates never seem to go anywhere is because people are talking about the ideas derived from these assumptions (e.g. gun control, the military) not the assumptions themselves.
IMNSHO until the debate gets down to that level the various camps are going to just keep talking past each other.
THe B-2 was based on a German WW2 bomber design by the Horton Brothers.
Northrop built a single seat rocket powered flying wing in 1944. It flew at least once, but I can't find any hard data on how thoroughly tested it was.
The B-35 bomber was a large propellor driven flying wing that was initialy conceived in the early 1940s . It seems to have had major stability problems that would not be fully solved until the advent of modern flight control systems.
The F-117 was based on a research paper by a Soviet scientist called Pyotr Ufimstev, who came up with the concept in the early 1970s, long before the F-117 program even started.
According to Ben Richs autobiography Skunk Works the paper was a fairly technical one about the propogation of radio waves that was discovere by a Lockheed mathematician name Denys Overholser. It was he who realised that the techniques in the paper could be used to predict the radar crossection of an aircraft based on the shape of the airframe. Up until that point RCS reduction seems to have been done by materials such as the carbon impregnated airframe of the Ho229 or the work in the u-2 and A-12 / SR-71 programs.
Interestingly one of the reasons given for the F-117s flate plate appearance is because it made the math easier to solve....
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Good point. Unfortunately I can't edit the post to correct the error.
Lenin and Stalin was also enamored with Lysenko. This lead to the imprisonment and execution of a number of Russian geneticists.
From the wikipedia article:
"In 1948, genetics was officially declared "a bourgeois pseudoscience"; all geneticists were fired from work (some were also arrested), and all genetic research was discontinued. Nikita Khrushchev, who claimed to be an expert in agricultural science, also valued Lysenko as a great scientist, and the taboo on genetics continued (but all geneticists were released or rehabilitated posthumously). The ban was only waived in the mid 1960s."
* The Vista performance/health monitor is actually pretty good, and provides a really handy ntop-like interface for seeing which service is doing what with the network (not as fine grained as I'd like, but it's a good starting point).
You are referring to the performance monitor that appears in server manager? For some reason I can't leave that monitor running on our systems, because it slows the rest of the system down to a crawl.
I can confirm that it handles AD quite effectively, having recently set one up. ACL support took a bit of fiddling to get setup how I wanted it, but once I got my head around the differences between the way POSIX, windows and Novell ACLs work I found it remarkably easy to operate. The UID issue was not a problem since I am only running a single server.
Those are two slightly different costs though - you can have virtual memory without necessarily using context switching and vice versa.
In modern processors, there is no penalty for using virtual memory, all translation from virtual to physical address space is done internal to the processor and you won't notice the difference.
No quite - Your thinking of the Translation Lookaside Buffer, it can do the conversion from real to virtual address within a clock cycle, but has a limited capacity. When an address is requested to a page not contained in the TLB a much longer operation is required to convert the address from scratch. Further requests to that page will be fast until it drops out again.
Many CPUs can populate the TLB in hardware, but no operating system seems to use this support - doing the conversion in software. The TLB works well right up until there is a context shift that requires the entire contents to be flushed. Then memory performance will be poor until the TLB is repopulated.
A significant portion of Australians are ethnic Germans - the Barossa Valley especially was settled starting in the 1840s by a large contingent of Lutherans. Up until the first world war they formed a distinct subgroup with their own language.
Bigelow are currently testing an inflatable space hotel module. They hope to fly the full sized version between 2012 and 2014.
NetWare was *the* file and print server for a very long time, however I think they have made a few dodgy technical decisions in recent years - We currently use no less than *three* different administration programs - but the killer is patch management. So man patches break underlying functionality that finding a stable patchlevel is so difficult that any kind of upgrade is done with only the upmost trepidation.
Believe me I'm talking from painful experience here....
I think SGI will be the company that will helped out the most by this.
SGI makes a lot of Itanium powered boxen. They seem to have picked the itanic as their primary platform from workstations up to their big end NUMA machines - a decision that probably doesn't help their balance sheet. If HP and Intel can rustle up more interest in the platform it may even make them a serious contender again.....
I'm wondering if we have seen something similar. The rumour is that a large company was selling cheap caps to a lot of computer manufacturers that have turned out to be faulty only once they have been in service for a significant period.
We have a large number of motherboards from a number of manufacturers purchased between 2001-2004 that have bad electrolytic capacitors on them - they have a bulge in the top of the can and in some cases they have leaked outright.
This has lead to stability issues on a large number of machines and has involved quite a lot of warranty service calls. Now that we know what to look for it is routine to pop the lid of a machine and check it's state while moving or overhauling it.
This sounds like the same kind of deal.
Sure thing.
I've realised I made a mistake however. While altitude compensation is critical for single stage to orbit designs, Spaceship two and three will launch from high altitude where the pressure is already about 1/10th of it's value at sea level. Thus altitude compensation is nowhere near as critical as in a design that runs from sea level such as DC-X, X-33 or shuttle.
no problem.
It's a 50% increase to the mouse lifespan. In humans with a life expectancy of 77 years that translates into an extension of thirty odd years.
from the article:
I have to agree I wouldn't want to live in a decrepit state, but staying young for longer has a definite appeal.
There are ways around it - raise the chamber pressure like in the shuttle or use an altitude compensating nozzle like an aerospike or plug nozzle but the kinks are yet to be worked out of these approaches.
There are problems with using air-breathing launchers. That said the most interesting idea I've seen for a cheap launcher includes them.
I blame Robert McNamara (sp?) The Dyna-Soar project was a re-usable spaceplane launched by a disposable booster. The initial version were single seat, but a version version that would carry four passengers to a projected space station in orbit (if this sounds familiar it's almost identical to the currently talked about shuttle replacement.)
After six years of development and US$660M in funding it was cancelled just after the construction of the first example had begun.
Interestingly in AU the debate has kicked up quite recently with a number of politicians suggesting nuclear power and desalinisation as a solution to the current water and energy generation problems.
Something I have been pondering for a while is a fundamental difference in point of view that seems to be related to the old nature vs nurture views on people.
One point of view is that people are products of their society. In the right situation and with the right influences they become model citizens and with the wrong ones they become violent troublemakers.
The opposing viewpoint is that people are generally decent, but there will always be a few bad apples and you have to plan accordingly.
This means that from one point of view the capacity for violence in all its forms needs to be supressed lest it make things worse, and from the other it needs to be maintained but in a harnessed form.
It strikes me that the reason these debates never seem to go anywhere is because people are talking about the ideas derived from these assumptions (e.g. gun control, the military) not the assumptions themselves.
IMNSHO until the debate gets down to that level the various camps are going to just keep talking past each other.
The B-35 bomber was a large propellor driven flying wing that was initialy conceived in the early 1940s . It seems to have had major stability problems that would not be fully solved until the advent of modern flight control systems.
According to Ben Richs autobiography Skunk Works the paper was a fairly technical one about the propogation of radio waves that was discovere by a Lockheed mathematician name Denys Overholser. It was he who realised that the techniques in the paper could be used to predict the radar crossection of an aircraft based on the shape of the airframe. Up until that point RCS reduction seems to have been done by materials such as the carbon impregnated airframe of the Ho229 or the work in the u-2 and A-12 / SR-71 programs.
Interestingly one of the reasons given for the F-117s flate plate appearance is because it made the math easier to solve....