tag:blogger.com,1999:blog-60117082024-03-07T14:10:23.916-05:00On Christina's RadarThis is my starter blog to post scitech stuff that I run across in my environmental scanning. The main subjects are: math, physics, astronomy, engineering, computer science, etc. Any opinions offered here are strictly my own and do not necessarily reflect those of my employer.Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.comBlogger176125tag:blogger.com,1999:blog-6011708.post-34827442904143933832006-12-21T10:17:00.000-05:002006-12-21T10:18:26.576-05:00Playing with the templateI wanted to upgrade a blog to the new template and work with it ... and to use a blog with some modifications yet not my LIS Rant which is pretty important to me.Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1143200478470651092006-03-24T06:39:00.000-05:002006-03-24T06:41:18.480-05:00I'm really mostly on my LIS blog now...Hi All-<br />I'm still really into science but I also work full time and am a doctoral student so I'm mostly just blogging over at my <a href="http://christinaslibraryrant.blogspot.com">library science blog</a>. I may start adding things back here but yes, it has been quiet around here :)<br /><br />ChristinaChristinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com1tag:blogger.com,1999:blog-6011708.post-1143115874695218782006-03-23T07:10:00.000-05:002006-03-23T07:11:14.706-05:00TestingSo apparently my main blog is locked because it's been identified as spam? Trying to post here to see if it works or if all of blogger is messed up.Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com1tag:blogger.com,1999:blog-6011708.post-1134512317480940762005-12-13T17:18:00.000-05:002005-12-13T17:18:37.523-05:00Seed: Udder Impossibility<a href="http://www.seedmagazine.com/news/2005/11/udder_impossibility.php">Seed: Udder Impossibility</a>
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<br />My favorite line: "For an unsuspecting cow standing normally, you'll need 4.4 people and for a cow smartly bracing herself, you'll need to muster 5.75 willing tippers."Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1127310539161280272005-09-21T09:48:00.000-04:002005-09-21T09:48:59.216-04:00Proceedings of the IEEE: Silicon Geranium?Well, at least the PDF is right!
<br />From the <a href="http://www.ieee.org/products/whats-new/wnckts/wnckts0905.xml">Circuits newsletter</a> v5 n9 (Sept 2005)
<br />PROCEEDINGS OF THE IEEE FOCUSES ON SILICON GERANIUM
<br />The September issue of Proceedings of the IEEE (v. 93, no. 9) provides a detailed analysis of the impact of silicon geranium on commercial products since its integration with complementary metal oxide semiconductors (CMOS). The issue focuses on silicon geranium and advanced CMOS semiconductor compatibility, which has led to the development of highly integrated single-chip designs with advanced bipolar performance. Paper topics include device physics, new processes, scaling issues, reliability, and device optimization for specific applications. Other key areas of interest are high-breakdown SiGe heterostructure bipolar transistors, low-cost derivatives, linearity and noise, modeling, design enablement, and circuit examples...
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<br />Don't you love spell check?Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com1tag:blogger.com,1999:blog-6011708.post-1125603814586818752005-09-01T15:43:00.000-04:002005-09-01T15:43:34.636-04:00Communications Networks Fail Disaster Area ResidentsArticle by Arshad Mohammed and Jonathan Krim (9/1/2005) pD01
<br />Maybe these people don't know that local ham groups practice multiple times a year out in mobile units with generators and mobile rigs and antennas. It's purely voluntary -- they do it because they think it's important and they know they can help.
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<br />In fact, if you have an amateur radio license please volunteer. Here's more information from ARRL:
<br />Hurricane Katrina Volunteer Signup Database Now Open (Aug 31, 2005) -- The Hurricane Katrina Disaster Communications Volunteer Registration & Message Traffic Database now is open. Site Administrator Joe Tomasone, AB2M, set up the database, and South Texas ARRL Section Emergency Coordinator Jerry Reimer, KK5CA, is handling volunteer coordination. This site is intended for Amateur Radio volunteers to sign up for communication support duty on behalf of Hurricane Katrina relief and recovery efforts in Louisiana and Mississippi.<a href="http://www.arrl.org/news/stories/2005/08/31/101/?nc=1"> Full Story </a>
<br />(link courtesy of WB3DAJ via e-mail)
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<br />-N3RFIChristinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com1tag:blogger.com,1999:blog-6011708.post-1125496146516391482005-08-31T09:48:00.000-04:002005-08-31T09:49:06.516-04:00Same place, different templateI was forced to change templates -- so you probably have landed in the right spot, it just looks different.Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1124978464846865212005-08-25T09:52:00.000-04:002005-08-25T10:01:04.856-04:00Arxiv has trackbacks!Wow. Post copied in its entirety from Cosmic Variance. Pointed to by <a href="http://crookedtimber.org/2005/08/24/blogging-arxiv/">Crooked Timber</a> (I sub to CV, but hadn't read this yet) which was pointed to by DR on Chem-Inf.<br /><h3><a href="http://cosmicvariance.com/2005/08/24/arxivorg-joins-the-blogosphere/" rel="bookmark" title="Permanent Link to "arxiv.org Joins the Blogosphere!""></a></h3> <blockquote> <h3><a href="http://cosmicvariance.com/2005/08/24/arxivorg-joins-the-blogosphere/" rel="bookmark" title="Permanent Link to "arxiv.org Joins the Blogosphere!"">arxiv.org Joins the Blogosphere!</a> </h3> <small class="metadata"> <b><a href="http://cosmicvariance.com/author/sean/" title="Posts by Sean">Sean</a></b> at 6:14 pm, August 24th, 2005 </small> <div class="itemtext"> <p>Over the last fifteen years, the way that physicists communicate research results has been revolutionized by <a href="http://arxiv.org/form/">arxiv.org</a>, the preprint server devised by Paul Ginsparg (formerly xxx.lanl.gov). Any time you write a paper, you send it to the arxiv, where its existence is beamed to the world the next day, and it is stored there in perpetuity. Along with the <a href="http://www.slac.stanford.edu/spires/hep/">SPIRES</a> service at SLAC, which keeps track of which papers have cited which other papers, physicists have a free, flexible, and easy-to-use web of literature that is instantly accessible to anyone. Most people these days post to the arxiv before they even send their paper to a journal, and some have stopped submitting to journals altogether. (I wish they all would, it would cut down on that annoying refereeing we all have to do.) And <em>nobody</em> actually reads the journals — they serve exclusively as ways to verify that your work has passed peer review.</p> <p>So it’s exciting to see the introduction of <a href="http://arxiv.org/help/trackback/">trackbacks</a> to the abstracts at arxiv.org. As blog readers know, an individual blog post can inform other blog posts that it is talking about them by leaving a “trackback” or “pingback” — basically, a way of saying “Hey, I’m talking about that stuff you said.” This helps people negotiate their way through the tangles of the blogosphere along threads of common interest. Now your blog post can send trackbacks to the abstracts of papers at the arxiv! Here’s a test: I will link to <a href="http://arxiv.org/abs/gr-qc/0505037">my most recent paper</a>. If it works as advertised, the trackback will appear automatically, due to the magic of WordPress.</p> <p>Now, if you write a paper and people comment on it on their blogs, that fact will be recorded right there at the abstract on arxiv.org. Drawing us one step closer to the use of <a href="http://cosmicvariance.com/2005/07/23/the-blog-as-a-sharp-tool-for-research/">blogs as research tools</a>.</p> <p><em>Update</em>: In the comments, Jacques points to an explanation of some of the <a href="http://golem.ph.utexas.edu/%7Edistler/blog/archives/000638.html">history</a>; he was (probably) the <a href="http://golem.ph.utexas.edu/%7Edistler/blog/archives/000018.html">first to suggest the idea</a>, years ago (which is millenia in blogo-time).</p></div> </blockquote> <div class="itemtext"><p> </p> </div><br /><div class="tag_list"><span style="font-size:85%;">Tags: </span><span style="font-size:85%;"><a href="http://technorati.com/tag/physics" rel="tag">physics</a> </span></div>Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1124811300138372782005-08-23T11:35:00.000-04:002005-08-23T11:36:00.280-04:00New nanoparticle environmental health and safety database availableVia <a href="http://www.theengineer.co.uk/Articles/Article.aspx?liArticleID=291871">The Engineer</a> 8/23/05.<br /><br />From Rice and supported in part by NSF, this database collects scientific articles researching environmental health and safety aspects of nanoparticles (read<a href="http://icon.rice.edu/newsiconreleases.cfm"> press release</a>). From a librarian point of view, it leaves a little to be desired. In fact, it might be quite difficult to find the full text of the article based on the citation given. A guide to the abbreviations use for journals might be helpful (hmm, maybe they're using the pubmed ones?). I'd love to see the DOI and a link to the pubmed record (it does list PMID, though, so you can find the article that way if you recognize the number). For the articles on environmental concerns, there's no PMID... Hmm. Don't see a list of journals referenced or a methodology of how articles are identified.<br /><br />Anyway, looks like a good first step and will no doubt be useful to those working in the area.<br /><br /><div class="tag_list"><span style="font-size:85%;">Tags: </span><span style="font-size:85%;"><a href="http://technorati.com/tag/nanotechnology" rel="tag">nanotechnology</a> </span></div>Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1124383767139771842005-08-18T12:49:00.000-04:002005-08-18T12:49:27.200-04:00Come on, the Washington Post writer's a wimp!Come on, the <a href="http://www.washingtonpost.com/wp-dyn/content/article/2005/08/15/AR2005081501502_pf.html">Washington Post writer</a>’s a wimp! (article pointed to on the <a href="http://www.makezine.com/blog/archive/2005/08/the_heirs_of_ru.html?CMP=OTC-0D6B48984890">Make blog</a>)<br/><br/>I’ve totally been enthralled by <a href="http://www.makezine.com/">Make</a> since I heard about it a couple of months ago. It’s a quarterly magazine from O’Reilly that basically features life hacks. It’s how to actually <em>make </em>things…<br/><br/>The Washington Post article basically says that you have to be an electronics genius to use a multimeter. Personally, I think everyone should learn that in high school (if they didn’t already learn it in elementary). Honestly, though, you don’t have to be a teenage boy to <em>get </em>this magazine. I think this is really an extension of the movement that brought us junkyard wars and monster garage and I’m all for it.Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1123768193178371612005-08-11T09:49:00.000-04:002005-08-11T09:49:53.223-04:00Kung Fu Science :: An Einstein Year ProjectThis new IOP site rocks. (pointed out by <a href="http://cosmicvariance.com/2005/08/10/kung-fu-science/">Clifford on CV</a>). Perhaps not the best science ever for my colleague with whom I have an ongoing argument regarding science for the masses but cool nonetheless.Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1119458397235448622005-06-22T12:39:00.000-04:002005-06-22T12:39:57.276-04:00WashingtonPost: Russian Space Agency: Solar Launch FailedFor the above linked article, free reg. req.
<br />Author: By VLADIMIR ISACHENKOV,The Associated Press
<br />Wednesday, June 22, 2005; 12:20 PM
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<br />This vehicle was being launched to demonstrate a controlled flight of a <a href="http://en.wikipedia.org/wiki/Solar_sail">solar sail</a>. Solar sails are a means of spacecraft propulsion relying on pressure from sunlight. They would potentially work well for interstellar flight because they would allow the spacecraft to conserve fuel.
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<br />Apparently the booster rocket failed 83 seconds after launch. Readers may remember that this space vehicle was submarine launched (pretty cool if it works).
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<br />See the <a href="http://planetary.org/solarsailblog/">Cosmos 1 Blog</a> for real time updates from Emily Lakdawalla, Project Operations Assistant and Image Processing Coordinator for Cosmos 1. There's no archive listing, so you have to page back to read from the <a href="http://planetary.org/solarsailblog/index_01.html">pre-launch activities</a>...Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1119448264891499962005-06-22T09:51:00.000-04:002005-06-30T15:54:08.796-04:00Triangulating position from wi-fi signal strength instead of GPSPointed out in an <a href="http://www.ieee.org/products/whats-new/wnwireless/wnwireless0605.xml">IEEE Newsletter</a> and they saw it on <a href="http://www.primidi.com/2005/05/27.html">this blog</a>.<br /><br />They say it's good to 20m in dense urban environments and doesn't have the multipath issues of A-GPS. Since it's going on signal strength, I'm guessing you'd probably want 4 sources for a reliable fix (two signals would give you two equally probable locations, a third would say which of the two, a fourth would make me happier-- especially if the other signals are coming from the same general direction). This does limit you to dense downtown areas -- but that's what it's made for. The blogger who first pointed this out mentions people moving and taking their transmitters with them.<br />Update: <a href="http://research.microsoft.com/displayArticle.aspx?id=1269">John Krumm from Microsoft Research</a> recently presented a paper on this<i> </i>at MobiSys 2005, the Third International Conference on Mobile Systems, Applications and Services, held June 6-8 in Seattle.... apparently signal strength doesn't work as well as "other aspects of signal quality" hmm? The paper will appear in ACM <a href="http://doi.acm.org/10.1145/1067170.1067195">here</a> for subscribers.<br />Update 6/30: I just noticed that the July 2005 issue of <a href="http://ieeexplore.ieee.org/xpl/tocresult.jsp?isYear=2005&isnumber=31384&Submit32=Go+To+Issue">IEEE Signal Processing</a> (link for subscribers to Xplore) has a large special section on positioning in wireless networks.Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1119272923656580752005-06-20T08:59:00.000-04:002005-06-21T09:43:47.436-04:00The next kitchen gadget you have to have...A rapid prototyping machine? Actually, it appears to be more than that, it's a one-stop fabrication lab with machine tools, electronics manufacturing, and assembly.<br /><br />On <a href="http://weekendamerica.publicradio.org/programs/index_20050618.html">Weekend America</a> this past weekend, the hosts spoke with MIT professor <a href="http://web.media.mit.edu/%7Eneilg/">Neil Gershenfeld</a> about the Fab Lab project. The hope is that users will be able to make one off machines to fit their needs.<br /><br />You know, I really respect Professor Gershenfeld who laments the disconnect between working with your mind and working with your hands... to go to a liberal arts college or learn to weld in a trade school (the assumption that you can't do both). What he's trying to do with this fab lab is to reconnect thinking with doing. Actually <span style="font-style: italic;">making</span> something is a worthwhile pursuit.Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com1tag:blogger.com,1999:blog-6011708.post-1118952979144647072005-06-16T16:16:00.000-04:002005-06-16T16:16:19.186-04:00The Engineer Online - NASA demonstrates Mini AERCamArticle date: 6/15/05
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<br />This little robot looks like something out of a Douglas Adams book... but it makes a lot of sense to have a "mini autonomous extravehicular robotic camera" to be able to check out parts of the spacecraft that can't be seen by a camera on a stick. It uses a "rechargeable xenon gas propulsion system" -- aack, that's expensive. Xenon, if I recall correctly, is pulled out of the atmosphere, but you have to suck up a lot of atmosphere to get a little bit of Xenon. So with this, the imaging is the easy part the docking station and propulsion are slightly more tricky.
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<br />Here's the <a href="http://aercam.nasa.gov/">NASA page</a> for the little guy.Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1116969647047561072005-05-24T17:20:00.000-04:002005-05-24T17:20:47.103-04:00The Engineer: Radar spots climate anomaliesArticle dated 5/24/05
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<br />British Antarctic Survey and the University of Bath have installed a remote sensing radar in Antarctica that aid in the investigation of the <a href="http://en.wikipedia.org/wiki/Mesosphere">Mesosphere</a>. It also tracks the many meteors that burn up in the mesosphere.Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1116359905718021722005-05-17T15:58:00.000-04:002005-05-17T15:58:25.770-04:00Wired News: Super Water Kills Bugs DeadArticle by Skip Kaltenjeuser, 5/16/2005
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<br />The upshot is that a US company has developed a super-oxgenated water that is perfectly drinkable, but kills bacteria, viruses, and spores. Cool, right? Shelf-life of over a year.
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<br />This reminds me of a short story in which an ice that sank was invented. Short story short-- it took over the world and killed the planet. So, I guess the solution to pollution with the super water is dilution, but it still wouldn't be good for your fish tank.Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1113853720888962742005-04-18T15:48:00.000-04:002005-04-18T15:48:40.886-04:00Wired News: Asteroid Warnings Toned DownArticle by David Cohn, 4/16/05.
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<br />I like <a href="http://neo.jpl.nasa.gov/">NEO</a> stories but this is pretty funny. It's a slow news day when newspapers publish panic headlines about NEOs that have a 1 in 45 chance of hitting the earth in the next 25 years. Wikipedia has <a href="http://en.wikipedia.org/wiki/Torino_scale">this article</a> on the Torino Scale.
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<br />With all of these scales, whether from <a href="http://www.dhs.gov/dhspublic/display?theme=29">DHS</a> or the <a href="http://www.nhc.noaa.gov/aboutsshs.shtml">meteorologist</a>, they're supposed to clarify the actual threat, but the number of words it takes to explain a mango warning probably out weigh the original story.
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<br /><blockquote>...The colors haven't changed from the old system, but the explanation of what each color means has. Asteroids in the green section used to be deemed 'events meriting careful monitoring,' but now are considered 'normal.' And a level 6 object was described as capable of causing 'global catastrophe.' Now these, too, only merit the concern of astronomers...Not all the changes paint a rosier picture. Under the old system, a level 10 warning used to be described as 'causing global climatic disaster.' The new description reads 'a certain collision capable of causing global climatic catastrophe that may threaten the future of civilization as we know it.'</blockquote>
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<br />Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1113843250234995832005-04-18T12:54:00.000-04:002005-04-18T12:54:10.233-04:00Yay! ADS adds RSS FeedsPointed out by <a href="http://sdlibrarian.blogspot.com/2005/04/webfeeds-astrophysics-data-system.html">SD Librarian</a>.
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<br />Ok, so ADS (the NASA Astrophysics Data System) is really THE astro database. They've had e-mail alerts, but unfortunately not for affiliations. Now you can subscribe to a search in your feed reader and be kept up to date without filling your in box. Still no affiliations, but great nonetheless.Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1113500771118558302005-04-14T13:46:00.000-04:002005-04-14T13:46:11.116-04:00Notices of the AMS: The Importance of MathML to Mathematics Communication The link here is to the table of contents. Free registration required to retrieve the <a href="http://www.ams.org/notices/200505/fea-miner.pdf">full text PDF</a>.
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<br />Robert Miner. "The Importance of MathML to Mathematics Communication." <em>Notices of the AMS</em> v52 n5 (May 2005): 532-8.
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<br />One of my lines of inquiry has been how to search math -- I mean really search it. What if you don't know what the equation is called? Why can't you do a substructure search like you do in chemistry? Shouldn't math be easier to search than chemistry? Instead, it's worse that image searching.
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<br /><a href="http://www.w3.org/Math/">MathML</a> is supposed to fix some of these things. Miner is very enthusiastic in extolling its virtues. The only problem is that mathematicians don't seem to be jumping on the bandwagon. They seem to really like LaTeX.
<br /><a href="http://golem.ph.utexas.edu/~distler/blog/">
<br />One physicist</a> has created some plugins for WordPress and Movabletype to convert TeX equations to MathML. Cool... Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com1tag:blogger.com,1999:blog-6011708.post-1112886277882854082005-04-07T11:04:00.000-04:002005-04-07T11:04:37.883-04:00The New York Times|Technology: Pogue tests the new Oxyride batteryFree reg. req. David Pogue. "Can a New Disposable Battery Change Your Life? Parts of It, Maybe" NYT, 4/7/2005
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<br />He's a technology writer, not a scientist, but Pogue gives these new batteries a test. Not bad, but probably not as useful as NiMH. The <a href="http://www.cnet.com/4520-10602_1-5619696-1.html">Cnet article</a> has a little more on the actual technology involved. If I ever find the relevant patents, I'll update this.
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<br />Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1112798490503386652005-04-06T10:41:00.000-04:002005-04-06T10:41:30.503-04:00NASA - Solar Eclipse on April 8, 2005From NASA's neat Science Feed
<br />"On April 8th in North America crescent-shaped sunbeams will dapple the ground during a partial solar eclipse." There's <a href="http://sunearth.gsfc.nasa.gov/eclipse/SEmono/HSE2005/PSE2005city1/PSE2005city1.html">a timetable</a> from NASA's GSFC that tells you when it will happen in your neck of the woods. People in the south will have a much better show but this article points out some neat tricks.Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1112307778638705682005-03-31T17:22:00.000-05:002005-03-31T17:22:58.636-05:00news @ nature.com - Black holes 'do not exist' by Philip Ball 31 March 2005; doi:10.1038/news050328-8
<br />"These mysterious objects are dark-energy stars, physicist claims." Isn't that something out of StarWars? So the idea is that stars don't collapse and become black holes; rather they become filled with dark energy. The author says that this explains some of the event horizon wierdness. The original article is: Chapline G. Arxiv, <a href="http://xxx.arxiv.org/abs/astro-ph/0503200">http://xxx.arxiv.org/abs/astro-ph/0503200</a> (2005).Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1112018860051748152005-03-28T09:07:00.000-05:002005-03-28T09:09:21.596-05:00NASA is podcastingThey've had feeds and multimedia reports, but now they're in the popular and easy to find format.Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0tag:blogger.com,1999:blog-6011708.post-1111701593831198962005-03-24T16:59:00.000-05:002005-03-24T16:59:53.830-05:00The Engineer Online - Reducing the scale of dragI always like posting about coatings for ship hulls. Previous posts looked at more chemical methods to prevent barnicles, etc. I think I even posted about the vorticies created by <a href="http://www.iop.org/news/749">dolphin skin</a>. The method linked above uses a mechanical method. They created a coating that mimicks the <a href="http://www.amonline.net.au/fishes/what/scales/placoid.htm">placoid scales</a> of sharks "by creating a plastic and rubber composite coating made from billions of raised diamond-shaped patterns, each measuring 15 microns. Each diamond also contains seven raised ribs."Christinahttp://www.blogger.com/profile/12104847732663970352noreply@blogger.com0