<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/"><channel><title>CR4 - Recent Forum Threads and Blog Entries</title><link>http://cr4.globalspec.com</link><description><![CDATA[Recent content from CR4, The Engineer&apos;s Place for News and Discussion]]></description><copyright>Copyright 2009</copyright><pubDate>Sat, 04 Jul 2009 08:52:11 EST</pubDate><generator>http://cr4.globalspec.com</generator><item><title><![CDATA[Pressure Reducing Valves (PRV) locations?]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40029/Pressure-Reducing-Valves-PRV-locations?from_rss=1]]></link><description><![CDATA[Need help! I have 6&quot;dia. riser for 1Basement to 12flr(for sprinklers ground-12th flr) &amp;amp; another 6&quot;dia. riser that will run from basement to 25 flr (for sprinklers 13-25th flr) from a common header (typ. flr. elev-3.6m).On original design there are no PRV installed on system, which is not advisab]]></description><pubDate>Sat, 04 Jul 2009 08:52:11 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40029]]></guid><dc:creator>hardboiled</dc:creator><dc:subject>Mechanical Engineering</dc:subject></item><item><title><![CDATA[CAPACITORS TO REDUCE SPIKE]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40028/CAPACITORS-TO-REDUCE-SPIKE?from_rss=1]]></link><description><![CDATA[I want to prevent my AC units from hitting the spike associated w/ peak electric demand times. Are capacitors readily available for this purpose in the residential application. My units range in size from 1.5 to 3.0 tons.]]></description><pubDate>Sat, 04 Jul 2009 08:52:05 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40028]]></guid><dc:creator>Guest</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[izod/charpy impact tester]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40027/izod-charpy-impact-tester?from_rss=1]]></link><description><![CDATA[dear sir

  i want to know the relation between angle and time which formulla is used to get angle value]]></description><pubDate>Sat, 04 Jul 2009 08:00:57 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40027]]></guid><dc:creator>abdul rahim prc</dc:creator><dc:subject>Instrumentation</dc:subject></item><item><title><![CDATA[plastic tank is leaking]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40026/plastic-tank-is-leaking?from_rss=1]]></link><description><![CDATA[I have a leak in the bottom of my foam plastic tank 8000liters,so i have to glue it with a glue matching to be applied on plastic or metal chemical container while leaking to stop the leak,can i found such thing]]></description><pubDate>Sat, 04 Jul 2009 07:47:52 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40026]]></guid><dc:creator>Youyouj56</dc:creator><dc:subject>BioMech &amp; BioMed</dc:subject></item><item><title><![CDATA[electrical engr.]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40025/electrical-engr?from_rss=1]]></link><description><![CDATA[is it possible to generate electricity through the use of magnifying glass. (as is can  concentrate massive heat)]]></description><pubDate>Sat, 04 Jul 2009 06:40:55 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40025]]></guid><dc:creator>Muntaka Wada</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[what is meant by Emean (lux) value in lighting calculation]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40024/what-is-meant-by-Emean-lux-value-in-lighting-calculation?from_rss=1]]></link><description><![CDATA[what is meant by Emean (lux) value in Electrical Lighting Calculation and how to calculate it, anyone of u please help me and explain the same.

  Regards,

  Karthick.]]></description><pubDate>Sat, 04 Jul 2009 05:35:08 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40024]]></guid><dc:creator>Guest</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[AGITATOR GEARBOXES FAILURE]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40023/AGITATOR-GEARBOXES-FAILURE?from_rss=1]]></link><description><![CDATA[Hi All, does any one have experience with agitator gearboxes failure due to loosing agitator shaft blades in CIL tanks? What is the best condition monitoring method on this?

  Regards,

  Alli Kadete]]></description><pubDate>Sat, 04 Jul 2009 05:34:51 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40023]]></guid><dc:creator>KADETE</dc:creator><dc:subject>General Discussion</dc:subject></item><item><title><![CDATA[Rc systems]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40022/Rc-systems?from_rss=1]]></link><description><![CDATA[Hi,  I am making a RC car powered by electric ducted fans.  I have an old 3v rc reciever, and am buying a 11.1v lithium battery pack and 2 EDFs (130g thrust each).  Could it be wired up so the reciever has 3volts and then the two motors get their power from the lithium battery pack?  Cheers  B]]></description><pubDate>Sat, 04 Jul 2009 04:17:40 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40022]]></guid><dc:creator>Bondy111</dc:creator><dc:subject>Communications &amp; Electronics</dc:subject></item><item><title><![CDATA[Socket weld &amp; butt weld]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40021/Socket-weld-butt-weld?from_rss=1]]></link><description><![CDATA[With 4&quot; seamless pipe , our customer is asking for 4&quot; socket weld elbow as it is not available ex stock can we supply butt weld]]></description><pubDate>Sat, 04 Jul 2009 03:51:19 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40021]]></guid><dc:creator>regaltrd</dc:creator><dc:subject>Mechanical Engineering</dc:subject></item><item><title><![CDATA[Development factor]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40020/Development-factor?from_rss=1]]></link><description><![CDATA[what is development factor of transformer?]]></description><pubDate>Sat, 04 Jul 2009 03:50:32 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40020]]></guid><dc:creator>mbperumal</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[Need information for &quot;S-5&quot; a quality control project. ]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40019/Need-information-for-S-5-a-quality-control-project?from_rss=1]]></link><description><![CDATA[Iam a last year B.E.(Mechanical) student. I have to perform a project on Quality Control subject. So where will I get sufficent information regarding project.]]></description><pubDate>Sat, 04 Jul 2009 03:39:37 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40019]]></guid><dc:creator>bluebird</dc:creator><dc:subject>Engineering Projects</dc:subject></item><item><title><![CDATA[Color codes for organic solvents]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40018/Color-codes-for-organic-solvents?from_rss=1]]></link><description><![CDATA[I am basically handling process industry as a process engineer. In which i have to deal many organic solvents which are hazardous for human as well as envoirnment.

  Pls suggest me standard color codes for following solvents and utilities.

  1. Acetone

  2. Rectified spirit

  3. Instrume]]></description><pubDate>Sat, 04 Jul 2009 02:54:57 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40018]]></guid><dc:creator>Guest</dc:creator><dc:subject>Chemical &amp; Material Science</dc:subject></item><item><title><![CDATA[Leakage problems with concrete blocks]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40017/Leakage-problems-with-concrete-blocks?from_rss=1]]></link><description><![CDATA[I am in construction industry in Mumbai, India. My question is for construction of external wall of Building Natural bricks are better or Concrete blocks( Hollow or solid). In Mumbai we have seen leakage problems with concrete blocks. is this because the concrete block is not of required quality or]]></description><pubDate>Sat, 04 Jul 2009 01:59:06 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40017]]></guid><dc:creator>sandeephirani</dc:creator><dc:subject>Civil Engineering</dc:subject></item><item><title><![CDATA[Ask for Procedure of Ductor Test]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40016/Ask-for-Procedure-of-Ductor-Test?from_rss=1]]></link><description><![CDATA[Does anyone can tell me the procedure of Ductor test?]]></description><pubDate>Sat, 04 Jul 2009 00:24:40 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40016]]></guid><dc:creator>Guest</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[Data Transfer]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40015/Data-Transfer?from_rss=1]]></link><description><![CDATA[Several years back (~1989) I worked up some spreadsheets on Windows 95 and stored the data on 1.44 Meg floppy discs and put the discs aside until I might need the programs again.  Well, that time has come and now the only computer I have that has a 1.44 Meg floppy drive is an old laptop with no Inte]]></description><pubDate>Fri, 03 Jul 2009 23:39:37 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40015]]></guid><dc:creator>Guest</dc:creator><dc:subject>General Discussion</dc:subject></item><item><title><![CDATA[Ray burner]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40014/Ray-burner?from_rss=1]]></link><description><![CDATA[Dear all

  I use Ray burner for kettle.It use F.O oil.Now we had problem the oil latch on to rotation cup too much.Does any one have ideal please send to me to solve this problem]]></description><pubDate>Fri, 03 Jul 2009 23:31:56 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40014]]></guid><dc:creator>chuyen.dinh</dc:creator><dc:subject>Mechanical Engineering</dc:subject></item><item><title><![CDATA[Ray burner]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40013/Ray-burner?from_rss=1]]></link><description><![CDATA[Dear All

 Im my plant use Ray Burner for F.O oil.But now we had problem the oil stick at rotation cup too much and we saw at chimney don&apos;t have smoke.So now how to solve this problem and how to adjust?]]></description><pubDate>Fri, 03 Jul 2009 23:06:14 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40013]]></guid><dc:creator>chuyen.dinh</dc:creator><dc:subject>Automotive</dc:subject></item><item><title><![CDATA[Cell phone and gas pumps dangers]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40012/Cell-phone-and-gas-pumps-dangers?from_rss=1]]></link><description><![CDATA[I was ordered to turn off my cell phone at the gas pump the other day.  The attendant claimed a danger of explosion.  My argument that if it is safe to drive a internal combustion engine by the gas pump, it is certainly safe for a puny milliwatts phone.

  Obviously, she didn&apos;t believe me.  I comp]]></description><pubDate>Fri, 03 Jul 2009 21:10:35 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40012]]></guid><dc:creator>marcot</dc:creator><dc:subject>General Discussion</dc:subject></item><item><title><![CDATA[General Relativity Hawking Radiation]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40010/General-Relativity-Hawking-Radiation?from_rss=1]]></link><description><![CDATA[Some thought experiments and questions. I would much appreciate any comments on whether my analyses below are correct.

 1. I am falling feet first into a black hole. An external observer will never see me fall past the event horizon. However, in my frame of reference I will fall past it in finite]]></description><pubDate>Fri, 03 Jul 2009 20:20:40 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40010]]></guid><dc:creator>John.G.Cleary</dc:creator><dc:subject>General Discussion</dc:subject></item><item><title><![CDATA[ASME Sec-VIII]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40009/ASME-Sec-VIII?from_rss=1]]></link><description><![CDATA[Dear  Sir

  Can any budy clear my doubt on ASME Sect-VIII  Div-1 AND DIV-II.

  Which devision we have to choose for construction of any pressure vessel.?

  Is there any measure difference bteween two devision ? and what are those. ?]]></description><pubDate>Fri, 03 Jul 2009 19:49:41 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40009]]></guid><dc:creator>Guest</dc:creator><dc:subject>Mechanical Engineering</dc:subject></item><item><title><![CDATA[Christmas in july]]></title><link><![CDATA[http://cr4.globalspec.com/thread/40008/Christmas-in-july?from_rss=1]]></link><description><![CDATA[Is there a Santa Claus?

  http://www.physlink.com/Fun/IsThereSanta.cfm

  A nice winter scene to go along with the question]]></description><pubDate>Fri, 03 Jul 2009 19:33:46 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/thread/40008]]></guid><dc:creator>Garthh</dc:creator><dc:subject>General Discussion</dc:subject></item><item><title><![CDATA[Who Wins in Credit Crackdown?]]></title><link><![CDATA[http://cr4.globalspec.com/blogentry/9474/Who-Wins-in-Credit-Crackdown?from_rss=1]]></link><description><![CDATA[Thanks to new federal credit card regulations effective July 2010, consumers will avoid retroactive interest rate increases on existing card balances. They&apos;ll also get more time to pay monthly bills and more advance notice of changes in credit card terms, while facing fewer penalty fees and late cha]]></description><pubDate>Sat, 04 Jul 2009 07:46:00 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/blogentry/9474]]></guid><dc:subject>Design &amp; Analysis Software</dc:subject></item><item><title><![CDATA[Wind Power: Real Deal or Hot Air?]]></title><link><![CDATA[http://cr4.globalspec.com/blogentry/9477/Wind-Power-Real-Deal-or-Hot-Air?from_rss=1]]></link><description><![CDATA[While wind energy runs clean and is powered by one of the purest renewable energy resources next to the sun, is it as efficient as &quot;Green minded&quot; HVAC and construction professionals would have us believe? Even when turbines operate at maximum capacity, the most a commercial facility can expect the w]]></description><pubDate>Sat, 04 Jul 2009 07:46:00 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/blogentry/9477]]></guid><dc:subject>HVAC Blog</dc:subject></item><item><title><![CDATA[The Coming &apos;Tweet Bomb&apos;]]></title><link><![CDATA[http://cr4.globalspec.com/blogentry/9473/The-Coming-Tweet-Bomb?from_rss=1]]></link><description><![CDATA[We all know how rumors and false stories can quickly spread over the Internet. Imagine, now, what a single text message, of less than 140 characters, could do if it simultaneously reached 100 million people. Welcome to the era of Twitter, and the potential &quot;tweet bomb&quot; that could mobilize tens of mi]]></description><pubDate>Fri, 03 Jul 2009 07:46:00 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/blogentry/9473]]></guid><dc:subject>Drives Blog</dc:subject></item><item><title><![CDATA[Animal Articles - July 3, 2009]]></title><link><![CDATA[http://cr4.globalspec.com/blogentry/9444/Animal-Articles-July-3-2009?from_rss=1]]></link><description><![CDATA[Happy 4th of July to those of you in the U.S.!  I&apos;m away on vacation, but here are your weekly animal articles:

 Dogs may help detect diabetes.

 Did one giant kill another?  Dinosaurs vs. elephants.

 Lynx may be making a comeback in Colorado.

 What if your dog ate your passport?

 Spiders a]]></description><pubDate>Fri, 03 Jul 2009 00:01:00 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/blogentry/9444]]></guid><dc:creator>SavvyExacta</dc:creator><dc:subject>Animal Science</dc:subject></item><item><title><![CDATA[Do Brain Trainer Games and Software Work?]]></title><link><![CDATA[http://cr4.globalspec.com/blogentry/9479/Do-Brain-Trainer-Games-and-Software-Work?from_rss=1]]></link><description><![CDATA[From Scientific American:

 		  		 		The market for brain-training software continues to grow, but evidence of the programs&apos; ability to boost memory or intelligence in a broadly applicable way (rather than simply making people better at the task they are practicing) remains scarce. New studie]]></description><pubDate>Thu, 02 Jul 2009 10:12:08 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/blogentry/9479]]></guid><dc:subject>Engineering News</dc:subject></item><item><title><![CDATA[Ariane Launches the Biggest Space Satellite]]></title><link><![CDATA[http://cr4.globalspec.com/blogentry/9478/Ariane-Launches-the-Biggest-Space-Satellite?from_rss=1]]></link><description><![CDATA[From Newlaunches.com:

 		  		 		Ariane has recently launched the world&apos;s biggest commercial telecommunication satellite build for TerreStar Networks. The TerreStar-1 platform weighed seven tones at launch at it will provide voice, messaging and data connection to the North American market. T]]></description><pubDate>Thu, 02 Jul 2009 09:29:46 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/blogentry/9478]]></guid><dc:subject>Engineering News</dc:subject></item><item><title><![CDATA[Is Full Disclosure Best?]]></title><link><![CDATA[http://cr4.globalspec.com/blogentry/9472/Is-Full-Disclosure-Best?from_rss=1]]></link><description><![CDATA[Writing on Network World&apos;s Web site, a blogger took note of a recent incident in which the pilot of a transatlantic airliner (flying from Brussels to Newark, NJ) suffered a heart attack and died in flight. The copilot and another backup pilot continued the flight, landing the plane uneventfully in N]]></description><pubDate>Thu, 02 Jul 2009 07:28:00 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/blogentry/9472]]></guid><dc:subject>Sensors &amp; Switches</dc:subject></item><item><title><![CDATA[Are We Adept at Adapting?]]></title><link><![CDATA[http://cr4.globalspec.com/blogentry/9470/Are-We-Adept-at-Adapting?from_rss=1]]></link><description><![CDATA[Updated climate change projections for both the U.S. and UK foresee substantial temperature increases for both nations in the next century. Climate-related changes, including increased air and water temperatures, reduced snow cover, and greater frequency of heavy rainfall, have already been observed]]></description><pubDate>Thu, 02 Jul 2009 07:27:00 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/blogentry/9470]]></guid><dc:subject>Environmental Technology</dc:subject></item><item><title><![CDATA[World’s First LS9 Powered 2010 Camaro SS]]></title><link><![CDATA[http://cr4.globalspec.com/blogentry/9469/World-s-First-LS9-Powered-2010-Camaro-SS?from_rss=1]]></link><description><![CDATA[This is the first shot of the Hennessey&apos;s new baby running, and does it sound mean. Sure, the open headers have something to do with it, but still, damn. I have to wonder how wicked it sounds in person.

 But while I think the idea of dropping the ZR1&apos;s powerplant into a new Camaro is cool&amp;#8]]></description><pubDate>Thu, 02 Jul 2009 00:02:00 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/blogentry/9469]]></guid><dc:creator>CarDomain</dc:creator><dc:subject>CarDomain Blog</dc:subject></item><item><title><![CDATA[Cosmic Balloon Application III: Particle Momentum Decay]]></title><link><![CDATA[http://cr4.globalspec.com/blogentry/9443/Cosmic-Balloon-Application-III-Particle-Momentum-Decay?from_rss=1]]></link><description><![CDATA[We have seen how cosmic redshift can be understood as photons conserving angular momentum by &apos;shedding energy&apos; in terms of frequency as the cosmic balloon expands. Is it reasonable to think that particles simply shed speed in order to also maintain a constant angular momentum? So it seems.]]></description><pubDate>Thu, 02 Jul 2009 00:00:00 EST</pubDate><guid><![CDATA[http://cr4.globalspec.com/blogentry/9443]]></guid><dc:creator>Jorrie</dc:creator><dc:subject>Relativity and Cosmology</dc:subject></item></channel></rss>