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General Discussion

13381 threads, 235782 comments (3 Viewing)

Crimping Electrical Joints in Cooking Appliances

10/29/2014 by jonpatterns
Hi all I have recently been repairing a crepe cooker and a hotplate where the thermal fuse has gone. My problem is how best to make the joints betwee...
Pathfinder Tags: crimp cooking joint
Views: 240, Comments: 18
Last comment 10/30/2014 by HiTekRedNek

Google Challenge Update

10/29/2014 by Fredski
remember my inverter post? well a team came up with a new design
Views: 134, Comments: 4
Last comment 10/29/2014 by Fredski

Pyrolytic Carbon And Magnetic levitation

10/28/2014 by HiTekRedNek
Has anyone purchased one of the levitating magnetic toys that use pyrolytic carbon ? I have seen videos of it on you tube,and a question came to mind...
Views: 354, Comments: 39
Last comment 10/31/2014 by tommm

Is Crude Going Extinct Soon?

10/28/2014 by Fredski
Views: 192, Comments: 22
Last comment 10/30/2014 by jack of all trades

MARS and COMET - NARROW ESCAPE from COLLISSION on 19th October 2014

10/28/2014 by dhayanandhan
I happened to read A SCIENCE ARTICLE that about an year back, i.e., during October 2013, Scientists have observed/found out that a Comet is fast appro...
Views: 180, Comments: 9
Last comment 10/30/2014 by Brave Sir Robin
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Commercial Space

1815 threads, 3337 comments (2 Viewing)

Beginners Guide To Radio Controlled Flying

10/31/2014 by GeorgeWellman
Learning how to fly rc planes, helicopters or other types of radio controlled aircraft is a hobby that has seen a huge explosion in popularity in rece...
Pathfinder Tags: radio controlled planes rc planes rc planes uk
Views: 19, Comments: 2
Last comment 10/31/2014 by lyn

How to Migrate Data from Lotus Notes to Outlook?

10/31/2014 by kimsears25
To migrate mailbox data such as emails, attachments, notes, journals, images, sent-items, tasks, schedules, alarms, drafts, calendar, address book,...
Views: 3, Comments: 0

Are You Interested In Urban Planning And Sustainable Development?

10/30/2014 by ierekcomp
Our three day conference at Enna, Italy will withdraw you to exchange the better understanding of sustainable development with environmental resourc...
Pathfinder Tags: sustainability
Views: 33, Comments: 0

Battle for Water Meters: Water Spurt Owner Welded Steel Frame Locking Water Mete

10/27/2014 by monimo
Chef owner ran utilizing metal boxes to their water meters sealed Wong Nai bang, ran to query the master to use out of your water, were suspected t...
Views: 22, Comments: 0

Head of Structural Engineering & Design

10/27/2014 by btbsilent
Manufacturing company is looking for a Head of Structural Engineering & Design in Northamptonshire, UK Reporting into the Group Managing Director...
Views: 17, Comments: 0
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CR4 Feedback

601 threads, 10561 comments (0 Viewing)

Matter to be Looked at By CR4 Admin

10/31/2014 by dhayanandhan
This about CR4 Good Answers, which I raised about a year back, and to-day's problem is similar to that. Whether my answer is Good Answer or not, I ha...
Views: 59, Comments: 4
Last comment 10/31/2014 by Fredski

Not Again!!!!!!!!!!!!!!!!!!!!

10/28/2014 by lyn
Dual Direction Electric Generator seems interesting. BUT I CAN'T PLAY! Tell the kid from Berkley that reversing the rotation of his generator with e...
Views: 185, Comments: 7
Last comment 10/30/2014 by lyn

How to See All the Good Answers of All the CR4 Members

10/26/2014 by dhayanandhan
Dear CR4 MEMBERS, If we see the MEMBERS details on the left side, of CR4 we find at the bottom the GOOD ANSWERS for each member. If we open the membe...
Views: 75, Comments: 4
Last comment 10/27/2014 by dhayanandhan


10/21/2014 by dwight7475
How do I unsubscribe from this site?
Views: 133, Comments: 10
Last comment 10/28/2014 by Tornado

This Is Getting Old

10/15/2014 by lyn
You (or someone else on the same network) has done this operation too many times. You will have to try again tomorrow. Sorry for the inconvenience...
Views: 194, Comments: 11
Last comment 10/16/2014 by SavvyExacta
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Section Blogs

Caption This!

281 blog entries, 12087 comments (1 Viewing)

Caption This for 10/31/14

10/31/2014 by Kaplin
This week's image: Be sure to vote for your favorite caption!
Pathfinder Tags: Caption this engineering images funny images Halloween pumpkin
Views: 55, Comments: 18
Last comment 10/31/2014 by Unredundant

Caption This for 10/24/14

10/23/2014 by Kaplin
This week's image: Be sure to vote for your favorite caption! Thanks to Unredundant for submitting this image.
Pathfinder Tags: Caption this engineering images funny images ice coffee
Views: 495, Comments: 16
Last comment 10/26/2014 by energyconversion

Caption This for 10/17/14

10/16/2014 by Kaplin
This week's image: Be sure to vote for your favorite caption!
Pathfinder Tags: Caption this engineering images funny images wheelchair
Views: 555, Comments: 41
Last comment 10/26/2014 by JIMRAT
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Roger's Equations

90 blog entries, 1136 comments (0 Viewing)

Moore's Not Enough: The Future of Computing by Roger Pink

10/15/2014 by Roger Pink
Moore's Law Gordon E. Moore, in his 1965 paper entitled "Cramming More Components onto Integrated Circuits" made the observation that the number of c...
Views: 260, Comments: 1
Last comment 10/16/2014 by SimpleMind

Delicate Audacity: The Saturn V Rocket by Roger Pink

09/25/2014 by Roger Pink
"It was quite a monster to ride. It had a total of seven and a half million pounds of thrust, and the first stage burned four million pounds of pr...
Views: 473, Comments: 16
Last comment 09/30/2014 by Wrench twirler

Why LiFi? by Roger Pink

05/08/2014 by Roger Pink
The Coming Data Crunch Everywhere you look nowadays, the world is becoming more mobile. Smart phone...
Views: 593, Comments: 2
Last comment 05/09/2014 by Rixter
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The CR4 Admin Blog

68 blog entries, 1055 comments (1 Viewing)

IHS Engineering360 Tour

10/02/2014 by SavvyExacta
IHS Engineering360 launched one week ago. The new site is a great resource for engineers because it offers supplier and part search, daily news and...
Views: 177, Comments: 0

Changes to CR4 Navigation

09/25/2014 Welcome to the new IHS Engineering360! As you can see, there have been some slight changes to the navigation on CR4. Check out the graphic and explana...
Views: 407, Comments: 15
Last comment 09/29/2014 by Wrench twirler

CR4 and IHS Engineering360: New Online Destination for Engineers

09/02/2014 After 10 years of strategic planning and acquisitions, IHS Engineering360 will be released in September. Upon launch, this will become the largest onl...
Views: 523, Comments: 12
Last comment 09/25/2014 by Phys
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Challenge Questions

320 blog entries, 27349 comments (0 Viewing)

The Merlin Rocket Engine: Newsletter Challenge (October 2014)

10/01/2014 This month's Challenge Question: Specs & Techs from IHS Engineering360: The SpaceX Falcon 9 v1.1 uses nine Merlin 1D rocket engines in its first...
Pathfinder Tags: challenge question
Views: 2375, Comments: 46
Last comment 10/28/2014 by HiTekRedNek

Balloon Ride: Newsletter Challenge (September 2014)

09/01/2014 This month's Challenge Question: Specs & Techs from GlobalSpec: You are inside a car with the windows closed, and you are holding a helium ballo...
Pathfinder Tags: challenge question
Views: 4075, Comments: 40
Last comment 09/23/2014 by redfred

The Sprinkler Mystery: Newsletter Challenge (August 2014)

08/01/2014 This month's Challenge Question: Specs & Techs from GlobalSpec: An old home's new sprinklers are scheduled to start up at 9 PM but do not. A tec...
Pathfinder Tags: challenge question
Views: 4640, Comments: 144
Last comment 09/04/2014 by JE in Chicago
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Defense & Security Technology

77 blog entries, 1168 comments (0 Viewing)

Syrian Chemical Weapons Destruction Problematic

09/25/2014 by IHS GlobalSpec eNewsletter
A recent U.S. statement said Syria could have withheld some of its chemical weapons from destruction. While the stocks turned over have been destr...
Views: 187, Comments: 2
Last comment 09/29/2014 by Wrench twirler

China's Hong Kong Listening Post Revealed

08/24/2014 by IHS GlobalSpec eNewsletter
The purpose of a geodesic dome atop Hong Kong's highest mountain was unveiled recently in IHS Jane's Defence Weekly. The facility has been operating...
Views: 470, Comments: 8
Last comment 08/25/2014 by Unredundant

Sea Drone is Solar Powered

07/03/2014 by IHS GlobalSpec eNewsletter
Eco Marine Power's Aquarius USV (unmanned surface vessel) will be a trimaran covered with "marine grade" solar cells to charge its Li-ion batter...
Views: 411, Comments: 7
Last comment 07/08/2014 by europium mkII
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Physics In Film

9 blog entries, 85 comments (0 Viewing)

Medieval Physics - Siege Engines

09/03/2014 by cheme_wordsmithy
I don't think a blog series titled Medieval Physics would be complete without a discussion of siege engines. Siege engines were the machines that made...
Views: 394, Comments: 10
Last comment 09/09/2014 by SavvyExacta

Medieval Physics - Jousting

08/26/2014 by cheme_wordsmithy
In a previous blog entry I gave a short summary of the physics and history of the bow and arrow (thanks to all you CR4 users who shared your insight a...
Views: 348, Comments: 8
Last comment 08/29/2014 by phoenix911

Medieval Physics - Bows & Arrows

08/12/2014 by cheme_wordsmithy
Of the many interesting events that take place in the summer, one of my favorites are Renaissance fairs. Seeing the participants in character and cost...
Views: 496, Comments: 15
Last comment 08/13/2014 by suresh sharma
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The Engineer's Notebook

324 blog entries, 5342 comments (0 Viewing)

Engineering Degree? Your 'Get Out of Jury Duty Free' Card

08/20/2014 by HUSH
Jury duty is often described as a consequence of citizenship. "It's a civic duty!" and "Give back to your community!" are two of the more guilt-lace...
Pathfinder Tags: career engineer jury duty
Views: 720, Comments: 42
Last comment 08/26/2014 by adreasler

Life is Random

07/30/2014 by HUSH
I'm sure that by now you've heard yet another Jurassic Park film will be released next year. This time around the dinosaurs run amok and eat people,...
Pathfinder Tags: dinosaur extinction life Mars
Views: 473, Comments: 14
Last comment 08/04/2014 by europium mkII

Build a Better Fourth

07/02/2014 by HUSH
I may or may not have mentioned this before, but the Fourth of July is awesome. It's an unusual holiday here in the U.S., as it's our only federal h...
Pathfinder Tags: fireworks holiday July 4
Views: 444, Comments: 0
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Notes & Lines

18 blog entries, 116 comments (0 Viewing)

Acoustic Guitar Tonewoods

07/26/2014 by cheme_wordsmithy
I remember the day I received my acoustic guitar, and played it for the first time. In the moment, it seemed produced the most beautiful sound I had e...
Views: 392, Comments: 14
Last comment 08/06/2014 by Holzfeller

For Love of the Index

05/09/2014 by Hannes
If you're a literate human who's a (diligent) knowledge worker or (diligent) student, chances are you've used an index this week. Or at least you di...
Pathfinder Tags: books index indexing
Views: 300, Comments: 0

Wait...What'd I Just Say?

03/27/2014 by Hannes
Several months ago, an acquaintance decided to try out a speech recognition software program to cure writer's block. He found it to be quite "inte...
Pathfinder Tags: ambiguity natural language processing nlp words
Views: 769, Comments: 8
Last comment 04/02/2014 by Calnet42
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TechnoTourist’s Engineering Expeditions

80 blog entries, 461 comments (0 Viewing)

Vacation Destinations for Engineers

07/17/2014 by SavvyExacta
What are your summer vacation plans? TechnoTourist has compiled a list of some destinations of engineering interest that have been featured on the b...
Views: 463, Comments: 11
Last comment 07/22/2014 by SavvyExacta

Castell de Bellver - Mallorca Spain's Circular Castle

11/02/2013 by SavvyExacta
Bellver Castle, or Castell de Bellver, is located in Palma de Mallorca and dates back to the 14^th century. This particular castle is unique because...
Views: 560, Comments: 0
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Animal Science

210 blog entries, 1914 comments (0 Viewing)

Ways to Care for Your Aging Cat

06/16/2014 by SwissMiss
One of my most cherished memories is the day I adopted my first cat. My younger self was delighted to have a new friend, and as we grew together ove...
Views: 595, Comments: 8
Last comment 06/20/2014 by SwissMiss

Jeepers, Creepers... a Different Kind of Peepers!

05/01/2014 by SavvyExacta
The birds are singing, the grass is greening, and the peepers are peeping. Spring has finally sprung here in upstate New York after a long, long win...
Pathfinder Tags: ANIMAL SCIENCE frogs hibernation peepers
Views: 505, Comments: 5
Last comment 05/02/2014 by lyn

Would You Do Anything for Love? Cardinals Will!

02/14/2014 by SavvyExacta
As you enjoy your morning coffee you gaze out the window and watch the birds at the feeder. But what's going on in the distance - is something attac...
Pathfinder Tags: bird behavior
Views: 709, Comments: 6
Last comment 02/19/2014 by Doggoneit
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The Standard

1 blog entries, 3 comments (0 Viewing)

Safety News:The Helmet Debate in Girls Lacrosse

06/12/2014 by KevinCassidy
Recently, the Florida High School Athletic Association (FHSAA) voted to require the use of helmets by high school girls lacrosse players in Florida st...
Pathfinder Tags: ANSI ASTM Head Protection helmet Lacrosse ...
Views: 194, Comments: 3
Last comment 06/17/2014 by phoenix911
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WoW Blog (Woman of the Week)

159 blog entries, 452 comments (1 Viewing)

Women Redefining Leadership in STEM and IT

05/10/2014 by Chelsey H
As of 2014, there is still a lack of female representation in science, technology, engineering, and mathematics. Women hold just about 32 percent of...
Views: 481, Comments: 3
Last comment 05/11/2014 by europium mkII
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61 blog entries, 510 comments (1 Viewing)

Safety Concerns of Oil by Rail

10/30/2014 by cheme_wordsmithy
Historically, most oil in the U.S. has been transported via pipeline. In 2008, the U.S. saw the rise of a new alternative for crude oil shipment - rai...
Views: 160, Comments: 12
Last comment 10/31/2014 by C-Mac

Dangerous Drilling - Oil & Gas Rig Safety

03/06/2014 by cheme_wordsmithy
Crude oil and natural gas have over the last hundred plus years become critical to our way of life and economy. Not only do they satisfy a huge chun...
Views: 544, Comments: 2
Last comment 03/06/2014 by texasron
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What Is It?

60 blog entries, 1628 comments (1 Viewing)

What Is It? for 2/28/2014

02/28/2014 What is this stuff?
Views: 889, Comments: 30
Last comment 03/18/2014 by RufusVS

What Is It? for 2/22/2014

02/22/2014 What is this item? Two views are shown. Share your guesses below!
Pathfinder Tags: What is it?
Views: 1017, Comments: 71
Last comment 03/02/2014 by Andy Germany

What Is It? for 2/15/2014

02/15/2014 What is this? Bonus points if you can guess where it is, too!
Pathfinder Tags: What is it?
Views: 899, Comments: 19
Last comment 03/06/2014 by steven phaneuf
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Great Engineers & Scientists

144 blog entries, 498 comments (0 Viewing)

U.S. Presidents Who Were Engineers

02/16/2014 by SavvyExacta
Monday is Presidents' Day in the USA. In honor of Washington and all other presidents we will take a look at those who contributed something to engi...
Views: 836, Comments: 18
Last comment 02/21/2014 by suresh sharma
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"On This Day" In Engineering History

232 blog entries, 817 comments (0 Viewing)

October 31, 1941 – The Completion of Mount Rushmore

10/31/2013 by cheme_wordsmithy
One of the fondest memories I have from my "Out West" trip 6 years ago was arriving at the Mount Rushmore National Memorial in South Dakota. Though I...
Pathfinder Tags: monuments Mount Rushmore October 31
Views: 1001, Comments: 6
Last comment 11/02/2013 by ronseto
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Other Blog Entries of Interest

Are Energized Fluids the Economic Alternative?

10/03/2014 posted in Rockaholic Adventures
by Shawn
Suppliers, researchers, and service companies working in unconventional oil and natural gas plays look to displace large volumes of hydraulic fract...
Pathfinder Tags: energized fluids energized foams energized fracture treatments
Views: 201, Comments: 0

Galactic Puzzle (take 2)

09/23/2014 posted in Relativity and Cosmology
by Jorrie
Galaxies usually occur in galactic clusters or super-clusters, where from a few tens to a few thousand galaxies move in huge orbits around some...
Pathfinder Tags: Expansion rate Hubble flow
Views: 328, Comments: 23
Last comment 09/25/2014 by dkwarner

Do We Live In a White Hole?

08/28/2014 posted in Relativity and Cosmology
by Jorrie
At the event horizon radius of a normal black hole (BH), things 'fall in' at the local speed of light, or more subtly said, "space itself falls in...
Pathfinder Tags: black hole White hole
Views: 478, Comments: 29
Last comment 09/26/2014 by James Stewart

Slo' Mo' Hat Cam

07/04/2014 posted in Workbench Creations
by Del the cat
I wanted to see how my arrows were flying from my bow, specifically flight arrows. A flight arrow presents a conundrum, you'd think you would want...
Views: 741, Comments: 67
Last comment 07/15/2014 by europium mkII

The Poisson Distribution by Roger Pink

02/26/2014 posted in Derivations
by Roger Pink
The Poisson distribution, named for Simeon Denis Poisson, is a discrete probability distribution that expresses the probability of a given number...
Views: 438, Comments: 0

Whistling Walnut!

12/28/2013 posted in Workbench Creations
by Del the cat
What to do with the walnut shells left over from Christmas? Make a whistling arrow . I'd been toying with the idea for ages, and if you try an...
Views: 831, Comments: 33
Last comment 01/02/2014 by artsmith