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User: Penicillus

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  1. If your research is covered, this is very helpful. on National Academies Release Over 4,000 Free Science Books · · Score: 2

    Very often, the books and papers from NAS, NAE, IOM and NRC provide excellent references by the best people in the country and are very good evaluations of current research, and how we got there. In my work in indoor air quality microbiology, I downloaded one of their books (a page at a time), and the references and reviews were exceptionally helpful in my keeping current and interpreting data. Making their work available for downloading in large units is awesome!

  2. The increase in resolution is about 4X on World's Most Powerful Optical Microscope · · Score: 1

    This increase in resolution to ~50 nanometers is about 4X better than the ~200 nanometers (0.2 micrometers) that (because of diffraction) is the absolute best one can obtain with normal, visible light microscopy, assuming one uses oil and apochromatic objectives. For reference, we used to use the diatom, Amphipleura pellucida, which had 40 striae (lines of holes) in 10 micrometers. If we could see the striae (0.25 micrometers apart), we knew we had an excellent objective. If we could count the striae, we were estatic.

  3. Tube Steak now has a literal meaning on Scientists Work To Grow Meat In a Lab · · Score: 1

    Yum!

  4. Re:Comments funny, Dengue serious on Malaysia Releases Genetically Modified Mosquitoes · · Score: 2

    This is a good thing. I am a returned Peace Corps Volunteer from Malaysia. While I was there, several of us went camping in the Taman Negara (the rainforest that is located along the spine of the Malay peninsula), and one of us became ill with Dengue fever. We had a difficult time bringing him out. He developed a high fever, was very sick and was hospitalized - fortunately he mad a complete recovery. This is a pilot project, and I wish the Malaysians well. If the project works, economically, environmentally and otherwise, and more genetically modified mosquitoes are released, Malaysia could benefit considerably.

  5. Get a Carbon Monoxide meter on Running Your Own Ghost Investigation? · · Score: 1

    Seriously, many folks who have seen ghosts are actually being affected by Carbon Monoxide. You'll need a good meter, tho, as the CO meters that are found in homes are not sensitive enough.

  6. Access to Tools on Forget University — Use the Web For Education, Says Gates · · Score: 1

    Something that hasn't been mentioned is access to tools. Brick and mortar universities have SEM and TEM microscopes, near state of the art computers, instruments, laboratories, etc. that most internet students can't access. Universities have access to databases of current journals, which are very expensive. Also, the universities have individuals (professors and fellow grad students) who have experience using those tools (how and when to calibrate them, how they can be used, etc.) that one learns over a second pitcher of beer. Access to information over the internet is so much better than it was even 10 years ago, but one still needs hands-on experience with the tools, which are first available at brick and mortar Universities, and possibly (if one is fortunate) later in industry. Bill Gates had, for his day, access a very good computer tool, and he used it to begin to get where he wanted to go.

  7. This is a repeat of the TI 994A mess on TI vs. Calculator Hobbyists, Again · · Score: 1

    I can't help thinking that this behavior is a repeat of TI's attempt to control the software market just as it did with the TI 994A, years ago (in 1979-81 for newbies). I hope this locking down their calculators is limited to the educational market.

  8. xrf and lead-based paint -a correction on McDonald's, Cadmium, and Thermo Electron Niton Guns · · Score: 1

    Correction - the paint on homes is considered lead based paint if the house was built earlier than 1978. FWIW, lead based paint is considered 0.5% Pb or greater by weight and any paint with lesser quantities of lead is considered lead-containing paint. HUD housing regulations for lead paint kick in when children 0-6 are present, and OSHA considers any lead in paint to be covered by the lead exposure standard.

  9. Re:XRF is not a replacment for labratory testing. on McDonald's, Cadmium, and Thermo Electron Niton Guns · · Score: 4, Informative

    I sometimes use it to analyze soil samples in the field. Since you aren't necessarily shooting a homogeneous substance, you sometimes get results that don't reflect the overall concentration. To get meaningful data you have to send it to a fixed lab where they will extract it and get an analytical result that is more likely to reflect the real concentration.

    Actually, XRFs are commonly used by industrial hygienists to determine concentrations of lead (Pb) in lead paint. In fact, the new renovation, repair and paint (RRP) law that went into effect on April 22 assumes lead is in paint on homes built before 1981, unless the paint is measured to be less than 0.5% lead. The best way to do so (per EPA) is to use an XRF to determine whether lead is present or not, and what its concentration is. Alternatively, paint chips can be analyzed for lead in a laboratory; however, one can obtain 200-300 measurements for lead in a building with an XRF, whereas one may take 10-20 paint chip samples in the same time. What I'm guessing happened is than an IH used an XRF on a glass that his/her kid brought home from McDonalds and found some aberrant spectra - the IH took those readings further, and found the spectra matched cadmium. He/She then sent the glass with the readings to the Congresswoman. Given that cadmium has been substituted for lead in kid's toys, etc. (which was prohibited by law), and cadmium is considerably more toxic than lead, the Congresswoman had the glass tested, and the recall began.

  10. Re:By what definition of species? on New Estimate Suggests 5.5M Species On Earth, Not 30-100M · · Score: 1

    Hey guys, biologists will tell you that a "species is what a taxonomist (person who studies it) says it is" There are folks who believe in "biological species - species separated because they can't interbreed (mostly zoologists), folks who believe in "morphological species" (often botanists - people who say a species is a species because it is visually distinct), folks who separate species because they are on separate land masses (Chinese and American Sycamores), chemically distinct species (some fruit fly species separated by scent), behaviorally distinct species (crayfishes), etc. The list goes on ---

  11. The Challenger gasket on The Big Technical Mistakes of History · · Score: 1

    removing asbestos from the Challenger O ring, and replacing it with a "safe" substitute

  12. To Quote My Daughter on Should Kids Be Bribed To Do Well In School? · · Score: 1

    "Other kids got paid for making A's. If we didn't, we got to explain "Why Not?" My daughter was third in her class.

  13. One Word - Hospice on Lessons of a $618,616 Death · · Score: 1

    Hospice is a loving and caring way for helping the dying, and once an individual is admitted, many of the costs are absorbed by grants and government assistance there.

  14. Re:I'm not a scientist on Gov't Proposes "National Climate Service" For the US · · Score: 1

    I am a scientist (Ph.D.). I have not met Dr. Lubchenco, but I know of her work through the journal, Limnology and Oceanography, and I was astonished that the Federal Government was able to recruit such an excellent person for herding cats in Washington. We will be well served.

  15. Re:Water is a scarce resource on Self-Destructing Bacteria Create Better Biofuels · · Score: 1

    Actually, using cyanobacteria can get around the scarce resource problem, because cyanobacteria are among the most efficient micro-organisms at growing in hypersaline, warm ocean (and salt flat) environments. In freshwater pond environments, one sees a progression of algae from diatoms (early in the growing season when the water's cold) to green algae, to cyanobacteria. Many researchers attribute this progression to the microcrustaceans' eating preferences, literally spitting out the cyanobacteria until everything else is eaten.

  16. try Vector Linux 3.2 on Installing Linux On Old Hardware? · · Score: 1

    I have Vector Linux 3.2 installed on a Pentium 66. I split the (?1.2 gig) hard drive into two partitions, lap-linked the file (~320 meg) to the first dos partition, and used a Vector Linux boot disk to load the file and install it to the second partition. I have 16 megs of ram on the Pentium 66, so I think you install it successfully with your 486 system.

  17. The most important question you can ask each other on Navigating a Geek Marriage? · · Score: 1

    Do you have infinite patience?

  18. Use Ubuntu and run IE under Wine to avoid viruses on Windows Security and On-line Training Courses? · · Score: 1

    My wife is also a graduate student taking online courses. When she found she could not access the lectures using Windows XP Pro (DRM problems per Firefox), I installed a dual boot system with Ubuntu on her computer, and then installed IE and Windows Media Player with Crossover Office. It works splendidly, and the Linux kernel isolates IE from malware. Of course, it is very easy to move screenshots, etc. from the Linux to the Windows partition.

  19. With us, XP Pro doesn't work, but Ubuntu does on Woman Claims Ubuntu Kept Her From Online Classes · · Score: 1

    The reverse happened to my wife. She is a student in Library Science at Wayne State University. They are also a "windows only" shop. When she went to access the lectures for the computer technology course using Windows XP Pro, she could not - IE went into a continuous loop, and Firefox reported that the lectures were not accessible because of DRM. We tried to access the lectures on 4 computers with Windows XP Pro, including two of our own, and two at the library where she works, without success. Finally, I dug a copy of Windows 2000 out, and the lectures came through. A short time later, I was able to access the lectures through IE running with crossover office on Ubuntu, and on Firefox (using Mplayer on Ubunt 8.10) without. Later, we also found the lectures came through with Windows XP home. My wife now looks at the lectures using Ubuntu, and then reboots into windows and does her work with (the required) Office 2007 there.

  20. Reading Material is Just as Important on A Home Lab/Shop For Kids? · · Score: 1

    What he or she reads is just as important. For younger kids - The Book of Knowledge (if you can find it) has many "how to" articles. For older kids -a subscription to the Scientific American - Yes, it's high level - but a 9th grader can read at least some of it, and the ideas - the Amateur Scientist section of the 70's and 80's - led me to my present (scientific) career.

  21. Best Presidential Candidate, Democrats on Best Presidential Candidate, Democrats · · Score: 1

    I'm an old guy who likes Obama's inspiration but who remembers when a very young John F. Kennedy went to Vienna and was bullied by Nikita Kruschev. The result was the Cuban Missle Crisis and a near nuclear war. I wonder how Obama would respond if, for example, the Chinese Communists decide to invade Taiwan a year after the Beijing Olympics, and threaten the US with bankruptcy if the US defends Taiwan militarily, as the US must by treaty. The Chinese could do that by dumping the bonds on the market that they have been buying that George W. has been selling to finance the war in Iraq. Hillary and McCain would both probably finagle their way and not be bullied. How green is Obama?

  22. Re:Ripple Effect on Engineered Mosquitoes Could Wipe Out Dengue Fever · · Score: 1

    Mosquitoes are THE pollinators of many orchid species, and Malaysia has a large, diverse, orchid flora, so Malaysian biologists should consider the effects of greatly reducing the mosquito's numbers before the transformed bugs are released. That said, eliminating or reducing Dengue fever would be significant boon. I am a returned Peace Corps Volunteer from Malaysia. During my service, several of us went camping in the Tamen Negara (National Park) rainforest in the center of the Malay Peninsula. One of our party caught Dengue fever. He became very sick, and we were exceptionally fortunate to be able to get him to a physician in time for treatment, so that he is still with us.

  23. Re:I wouldn't call it a scam on OfficeMax Drops Mail-in Rebates · · Score: 1

    I bought a Western Digital hard drive from Office Max and mailed both the Western Digital and the Office Max rebate to the Office Max rebate center in the same envelope, as was requested. Western Digital sent me a rebate check; I got an email from Office Max saying they hadn't received my rebate form, and that was tough. I haven't been back to Office Max since.

  24. Freedos writes OS2 Warp floppy disks on FreeDOS Not Dead; 1.0 Release Imminent · · Score: 5, Interesting

    A long time ago, I copied my OS2 Warp installation CD to my hard drive; the CD is now someplace safe. In February, I used FreeDos to make OS2 Warp disk images from the hard drive, and installed OS2 onto an old 486. When the OS2 disk creation program is run under MSDOS 6, 7, or Win98 the 1.88 meg installation disks are created occasionally, and with agony; the dos window format of W2K and XP won't touch anything over 1.44 megs. FreeDos writes the 1.88 meg format easily on normal HD floppies, and all the floppies work the first time. Thank You FreeDos Developers!

  25. Re:Give the man a break on Bill Gates Gives $20M to CMU for New Building · · Score: 1

    My wife is a reference librarian at a small Michigan library in a town that meets the Gates criteria for being "poor" - ie more than 20% have incomes less than the poverty line. The 4 Gates computers in her library are used constantly, and there is usually a waiting list. Many people use the Gates computers to set up Yahoo email addresses so they can be contacted by businesses, or go online to search for employment. Those computers have made a tremendous difference in helping 40-55 year olds get employment after the local industries have shut down or moved to Mexico.