Intel Ships 3.2GHz Hexacore i7-970 Desktop CPU [Guts]

Intel's 32nm Gulftown architecture has produced its latest gem: the 3.2GHz hexacore i7-970 processor that'll set you back $900. In addition to being super speedy—especially with TurboBoost, which lets you rev up to 3.46GHz—you get 12MB of on-chip cache and a triple-channel DDR3 memory controller. Fun times, and something I wouldn't be at all surprised to see end up in the Mac Pro someday. [NewEgg Electronista] More »


That Mitchell look | Bad Astronomy

David Mitchell is one half of the brilliant British comedy team that makes the show "That Mitchell and Webb Look", which commonly has skeptical themes to its humor. Mitchell has a series of short videos posted on The Guardian, and he made one about global warming that, like everything he does, is fantastic. They don’t allow embedding — hey Guardian, it’s the 21st Century now! — so I’ll just link to it and let you have a look.

Tip o’ the thermometer to Arthur Taylor.


Audit Your MySQL Memory Usage

Matthew BoehmEver wonder why your MySQL server runs out of memory or your server starts swapping it like crazy? It could be that you are allowing too many connections or have a buffer that isn’t being used. Here are some simple formulas you can use to determine how much memory your MySQL server can use.

All of these variable values can be seen by using “SHOW GLOBAL VARIABLES” at the MySQL client prompt. They are given in bytes so you must convert to KB, MB or GB by dividing the value returned by 1024, 1048576 or 1073741824, respectively.

Remember: Each connection from your application is referred to as a thread by MySQL.

Per-Thread Memory Use (The amount of memory a single connection can use):

read_buffer_size + read_rnd_buffer_size + sort_buffer_size + thread_stack + join_buffer_size

Example: 1048576 + 2097152 + 1048576 + 262144 + 131072 = 4587520 bytes
Divide that by 1048576 to get the usage in MB, and you find that each thread can use up to 4.375 MB of memory.

Now, take that amount and multiply by your max_connections, and you’ll find the total potential memory usage. For this example, let’s set max_connections to 350. The example server could use 1,531.25 MB or 1.49 GB if all 350 connections were in use at a given time. If we have 4GB of RAM in the server, that accounts for almost one third of our available memory.

And that’s not all! There are several other “global buffers” that MySQL creates depending on which table engines you are using. The formula below assumes you have a mix of MyISAM and InnoDB tables and you are using the query cache:

Base MySQL Memory Usage

key_buffer_size + max_heap_table_size + innodb_buffer_pool_size + innodb_additional_mem_pool_size + innodb_log_buffer_size + query_cache_size

Example: 1073741824 + 33554432 + 2147483648 + 134217728 + 10485760 + 536870912 = 3936354304 bytes
To get the usage in GB, we divide by 1073741824 and see that 3.66 GB is being used!

Again, in a 4GB server, base MySQL – with no connections – can use 3.66GB, or about 90 percent of my server’s physical memory. Yikes! When you see that, your first move should be to contact your sales rep to get more memory installed. We advise, for system stability, never to assign more than 80 percent of overall system memory to MySQL (or any process for that matter).

One other area to check for memory reduction is your client application code. While the PHP manual says you don’t have to explicitly call mysql_close or mysqli_close, we highly recommend it as a best practice because there’s a known PHP bug that prevents connections from being properly closed on script termination. And if each connection to MySQL eats up a base amount of memory whether it’s being used or not, your server will suffer for no reason.

-Matthew, CMDBA 5.0

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Pratt & Whitney Rocketdyne Joins CSF

Pratt & Whitney Rocketdyne Joins the Commercial Spaceflight Federation, Endorses NASA's New Direction

"The Commercial Spaceflight Federation is pleased to announce that Pratt & Whitney Rocketdyne has joined the Federation as an Associate Member. With 3,100 employees across Florida, California, Alabama, and Mississippi, including more than 1,800 employees in Southern California, the company is a leading provider of propulsion and power systems for space flight."

New Director at NASA Lunar Science Institute

NASA Names New Director for Lunar Science Institute

"Yvonne Pendleton has been named director of the NASA Lunar Science Institute (NLSI) headquartered at NASA's Ames Research Center, Moffett Field, Calif. Pendleton has served as the NASA Ames deputy associate center director, chief of the Space Science and Astrobiology Division and as a research astrophysicist for 31 years, including nearly two years at NASA headquarters."

Australian Goal: Reach 100% Renewable Energy

A new renewable energy report is good news for Australia!   Now we need this goal in the United States and the political support and will to do it.  Why let other countries get ahead of us on renewable energy?  (I know it’s too late, but we can still catch up if Congress would get its act together).  Especially in the wake of the still on-going Gulf of Mexico oil disaster, renewable energy should be a topic even more supported in the U.S. now than ever before.

The /Zero Carbon Australia/ (ZCA) report is the culmination of 12 months of pro bono work by engineers, scientists and postgraduate university students, performing the research that no Australian government has been prepared to undertake. The result is a truly innovative collaboration the likes of which has never been seen before in Australia. It is a true failure of leadership that our elected representatives have not developed a comprehensive transition plan for the energy sector even though it is at the heart of climate change mitigation efforts. Instead it has been left to a group of concerned citizens to pick up the slack.

Is it possible for Australia to power its homes, office buildings, and factories without adversely affecting our climate? The answer is yes.

The ZCA plan presents a carefully considered analysis of the energy technologies, industrial capacity, and investment required to repower Australia. The report shows that Australia can replace fossil-fuel baseload electricity using commercially available renewable energy technology, with the additional investment required equal to about one cup of coffee per person per day over the ten year transition. Our researchers have found that a 60/40 mix of concentrated solar thermal power and large-scale wind developments combined with an upgraded grid and comprehensive energy efficiency measures can reliably supply Australia’s electricity needs.

Concentrated solar thermal power is the crucial renewable energy technology that will help Australia transition. Power stations are really glorified kettles. You need an energy source to boil water, so the steam can turn a turbine. Coal-fired power stations do this by burning coal. Nuclear power stations use nuclear fission. Solar thermal power stations concentrate the sun’s rays and store this energy as heat, to be used for boiling water day or night. Torresol Energy’s Gemasolar plant under construction in Spain will deliver power 24 hours a day with the same baseload production characteristics as a conventional coal plant. Next time you hear someone say that the sun doesn’t shine at night, tell them it doesn’t matter.

Full report available here. To download the full Zero Carbon Australia Stationary Energy Plan click HERE (8.4MB). You can also download a 16-page synopsis HERE.

BI and BC Impellers

I am doing a comparative study of backward inclined and backward curved centrifugal fans for the extraction of electrolysis pot gases.

my system has a BI fan of 650mmH2O total pressure. I want to increase to 775mmH2O.

Can a BC fan do this job at the same motor power?

Is the World Ready for the Waterless Urinal?

From Wired:

In a laboratory 10 miles east of downtown Los Angeles, a mechanical penis sputters to life. A technician starts a timer as a stream of water erupts from the apparatus's brass tip, arcing into a urinal mounted exactly 12 inches away. James Krug smiles. His latest back-sp

Infecting Minds: My Lecture at the American Society for Microbiology | The Loom

I gave a talk at the President’s Forum at the annual meeting of the American Society for Microbiology in May about how I go about telling stories about science. The folks at ASM have done some slick video editing and posted the lecture at their site, where you can also download it in various formats. Or just watch it in the embedded player below. In my lecture, I talk about getting out of bunkers and jumping chasms, as well as the trouble parasites can get you into on a blind date.

MWV39 – Carl Zimmer: Newspapers, Blogs, and Other Vectors: Infecting Minds with Science in the Age of New Media from microbeworld on Vimeo.


Yes, We Should Clone Neanderthals | Science Not Fiction

Neanderthal_child30,000 years ago a Neanderthal woman died in what would become Croatia’s Vindija cave. Five years ago, 454 Life Sciences and the Max Planck Institute started working together on the tedious and time-consuming task of piecing her fossilized DNA back together. Just over a month ago, they succeeded and, in the process, revealed that most of us are between 1% and 4% Neanderthal. To crudely paraphrase the ever artful Carl Zimmer, knowing where Neanderthals fit into the evolution of Homo sapiens is essential to understanding the development of the human mind.

Knowing where Neanderthals fit, however, also creates a problem. What do we do if what makes humans “human” isn’t from a “human” at all? How do we justify “human rights” in light of evidence that our rational and moral minds are in no small part the result of prehistoric crossbreeding? In short: if human rights are based on being human, what rights would a cloned Neanderthal have?

The problem is, of course, that we don’t have a cloned Neanderthal. Which is why we need to make one.

The argument may seem absurd and offensive at first. Both Zach Zorich, writing for Archaeology, and Andrew Mossman, writing for fellow Discover blog 80beats, explore the idea and come down on the side of “it’d be nice science for science’s sake, but way too unethical to do.” Summarizing Zorich, Moseman says:

As the bioethicist Bernard Rollin points out in the Archaeology piece, there’s more to worry about than the law. While Neanderthals are our close relatives on the evolutionary tree, you’d know one if you saw one. Tulane anthropologist Trenton Holliday argues that they could talk and act like us, therefore eventually they’d fit in. But that seems like wishful thinking. With no culture, no peers, and an unknown capacity to cope with the modern world mentally or physically, a Neanderthal would be adrift—caught between a zoo animal and a human being. The main point in cloning one would be for scientists to study it, but as law professor Lori Andrews says, a Neanderthal could be granted enough legal protection to make doing extensive research on it illegal, not just unethical.

That’s not to say there would be no benefits to science. But some things are best left in the past.

Not so. We have tried, and will continue to try, to resurrect extinct species in the past, such as the Spanish ibex. Why should the Neanderthal be any different? If we assume the ability to clone safely – for a moment setting aside the current, significant flaws with the process – we can focus on the ethics of bringing a Neanderthal into the world without a familiar culture or peers. Maybe the Neanderthal would have trouble adapting, picking up language, and adjusting to a modern existence. Or maybe not. We don’t know, and there’s the rub.

Unlike examples found in science fiction, be it Mary Shelley’s Frankenstein or the more recent sci-horror flick Splice, it’s not as if our only options are to send the neo-Neanderthal into the world on its own or to trap it in a laboratory where it would be poked and prodded to death. The moral of both of those works is that when one fails to take responsibility for one’s creation, when one fails to nurture and protect that new being, that is when an ethical code is breached and damage is done. We don’t know how a Neanderthal would exist in our world, but we know we are capable of studying chimps and apes outside of their natural habitat without causing them harm or reducing their quality of life flagrantly. We also know that we are surrounded by those who are only partially mentally developed, be they children or the mentally disabled, whom we love and care for without question. The very purpose of cloning a Neanderthal would be to see where it fits in our mental development. Attentive and accurate nurture and care would be central to any scientific effort to study Neanderthal development and mental growth. Allowing the clone to be neglected would upend the very purpose of cloning her in the first place.

To assert that the Neanderthal is between human and animal and is therefore an impossible fit for our world simply not true. The line between human and animal is blurred. Dolphins, whales, chimps, great apes, and other species are already changing the way we think about intelligence and rights; perhaps a Neanderthal, fully developed but so mentally different as to be incompatible with our way of living is the very example our society needs to change our perception of intelligent non-humans. When the technology is safe and the ability to nurture and care for her in place, we owe it to humanity as a whole to clone a Neanderthal and see what wonders she might teach us about ourselves.


LG Plasma Blue Haze

My 50" LG plasma TV (about 4 years old now) has recently begun showing what I can only describe as 'digital noise' at the top of the screen. It shows up as a field of blue pixels in a randomly shaped band about 1 1/2" thick across the top and sometimes only in the corners, of the viewing area. It on