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09/29/2014 10:47 AM

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Section Forums

General Discussion

13326 threads, 234403 comments (17 Viewing)

What Operation Were You Attempting?

09/29/2014 by lyn
To respond to a thread.
Views: 50, Comments: 2
Last comment 09/30/2014 by lyn

Reply to Help with VDF Pump Control

09/29/2014 by lyn
Thanks for your reply Yes you are right, With some adjustement I can have both speed for the 2 preset levels I need and indicate via 0to10v from...
Views: 31, Comments: 0

‘Cloaking’ Device Uses Ordinary Lenses to Hide Objects Across Range of Angles

09/29/2014 by Rixter
Views: 47, Comments: 1
Last comment 09/29/2014 by Anonymous Hero

Waveguide Repair

09/29/2014 by Unredundant
Although there are no specifics for the nature of the damage to the FAA center in Aurora Il. What is involved in repairing damage to waveguides?
Pathfinder Tags: Waveguide repair
Views: 163, Comments: 14
Last comment 09/30/2014 by Brave Sir Robin

Energy, Food for Thought

09/27/2014 by Fredski
I've mentioned this before but I think its worth a revisit. basically its the work of an MIT professor(now Harvard) named Nocera. his vision is using...
Views: 377, Comments: 148
Last comment 09/30/2014 by Andy Germany
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Commercial Space

1800 threads, 3309 comments (3 Viewing)

What Composes a Screw Oil Press?

09/28/2014 by queena
Screw oil press is a common tool used of making edible oil. Edible oil processed by oil expeller is much healthier and more delicious than chemical...
Pathfinder Tags: Screw Oil Press
Views: 7, Comments: 0

How does Rice Milling Machinery Work? Look the Picture Follow

09/28/2014 by queena
How much do you know rice milling machinery? Do you know the whole process of rice mill machinery? The picture follow show you clearly.
Pathfinder Tags: rice mill machinery
Views: 7, Comments: 0

Oil Expeller for Processing Soybean

09/27/2014 by queena
Soybean oil is one of the most common edible oil in our daily life. Soybean oil can be processed by oil pressing method and oil extraction method. B...
Pathfinder Tags: Oil Expeller
Views: 10, Comments: 0

New Business Opportunity !!

09/23/2014 by pranav14
Hi Team , I'm Mechanical Engg. ,i'm trying to start my own business in Manufacturing area. Basically i'm from India.Please provide your view on.In m...
Views: 34, Comments: 4
Last comment 09/26/2014 by phoenix911

Building Automation Software

09/23/2014 by softdelsystem
Building automation software (BAS) are central, interconnected, networks of software and components, which observe and control the environment in comm...
Pathfinder Tags: building automation software building management systems software
Views: 37, Comments: 6
Last comment 09/23/2014 by Anonymous Poster
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CR4 Feedback

593 threads, 10499 comments (2 Viewing)

Display Width

09/30/2014 by Codemaster
One for Admin! There's been discussion before about screens being wider than normal, with a horiizontal scroll bar appearing at the bottom. Caused by...
Views: 15, Comments: 1
Last comment 09/30/2014 by SavvyExacta


09/29/2014 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 inconv...
Views: 32, Comments: 1
Last comment 09/29/2014 by truth is not a compromise

"New" CR4 Operating Instructions?

09/29/2014 by Tom_Consulting
Maybe I missed it, but is there some post that explains how to use this new version of CR4? Like is there an easy way to find the "Login" prompt? Is t...
Views: 79, Comments: 6
Last comment 09/29/2014 by SavvyExacta

Male Enhacement....Really?

09/26/2014 by kramarat
I opened this news article this morning, and when I followed the link to the whole article, I got a pop up ad for some male enhancement stuff. WTF? h...
Views: 95, Comments: 10
Last comment 09/29/2014 by truth is not a compromise

If it Ain't Bust Don't Fix It

09/25/2014 by Del the cat
Great job of spoiling the look, feel and accessibility of CR4 Del
Views: 142, Comments: 14
Last comment 09/25/2014 by lyn
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Section Blogs

Roger's Equations

89 blog entries, 1135 comments (0 Viewing)

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: 343, 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: 515, Comments: 2
Last comment 05/09/2014 by Rixter

New Dwarf Planet And Other Solar System News by Roger Pink

03/26/2014 by Roger Pink
- New Dwarf Planet Discovered - Astronomers have increased the size of the observable solar system after spotting a 450-km wide object orbiting the...
Views: 513, Comments: 7
Last comment 05/01/2014 by europium mkII
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Caption This!

277 blog entries, 11901 comments (0 Viewing)

Caption This for 09/26/14

09/25/2014 by Kaplin
This week's image: Be sure to vote for your favorite caption!
Pathfinder Tags: Caption this crane Eiffel Tower engineering images funny images
Views: 482, Comments: 23
Last comment 09/29/2014 by jdretired

Caption This for 09/19/14

09/19/2014 by SavvyExacta
This week's picture: Be sure to vote for your favorite caption!
Pathfinder Tags: Caption this
Views: 570, Comments: 25
Last comment 09/22/2014 by Kevin LaPaire

Caption This for 09/12/14

09/11/2014 by Kaplin
This week's image: Be sure to vote for your favorite caption!
Pathfinder Tags: Caption this cell phone engineering images funny images
Views: 592, Comments: 34
Last comment 09/14/2014 by metalSmiths
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The CR4 Admin Blog

66 blog entries, 1055 comments (0 Viewing)

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: 306, 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: 461, Comments: 12
Last comment 09/25/2014 by Phys

Why You May Have Fewer Posts & GAs

07/08/2014 by SavvyExacta
The team has been cleaning up CR4 a little bit. Your post and good answer totals may be lower because posts and comments from deleted threads are no l...
Views: 498, Comments: 26
Last comment 07/15/2014 by Kris
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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: 107, 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: 416, 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: 366, 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: 336, 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: 296, 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: 449, Comments: 15
Last comment 08/13/2014 by suresh sharma
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Challenge Questions

319 blog entries, 27303 comments (3 Viewing)

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: 3633, 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: 4552, Comments: 144
Last comment 09/04/2014 by JE in Chicago

Space Trail: Newsletter Challenge (July 2014)

06/30/2014 This month's Challenge Question: Specs & Techs from GlobalSpec: The path that a spacecraft follows when traveling to the moon is a distorted fig...
Pathfinder Tags: challenge question
Views: 2776, Comments: 21
Last comment 08/10/2014 by WilhelmHKoen
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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: 587, 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: 407, 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: 383, 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: 331, 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: 250, 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: 698, 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: 400, 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: 515, Comments: 0

Barcelona and the Influence of Antoni Gaudí' (Park Güell, Sagrada Familia)

10/11/2013 by SavvyExacta
My travels brought me to Spain a few weeks ago. Barcelona is a port city that was revived by hosting the 1992 Summer Olympic Games. But 100 years befo...
Pathfinder Tags: Gaudi Park Guell Sagrada Familia
Views: 470, Comments: 1
Last comment 10/11/2013 by PWSlack
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Animal Science

210 blog entries, 1914 comments (1 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: 522, 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: 448, 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: 661, 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: 184, Comments: 3
Last comment 06/17/2014 by phoenix911
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WoW Blog (Woman of the Week)

159 blog entries, 452 comments (0 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: 385, Comments: 3
Last comment 05/11/2014 by europium mkII

Top 10 Women Engineers and Scientists

10/18/2013 by CR4 Guest Author
Many women have made great contributions to science and engineering. Check out the list of the 10 below and read their biographies. Then, let us know:...
Views: 668, Comments: 8
Last comment 11/20/2013 by Tornado
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60 blog entries, 498 comments (0 Viewing)

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: 481, Comments: 2
Last comment 03/06/2014 by texasron

Titanic Sank Over A Century Ago, But The Story Lives On - 5 Possible Reasons Why Is It So Interesting Even Today!

10/13/2013 by CR4 Guest Author
On April 10, 1912, Titanic, the virtually unsinkable ship, embarked on its maiden voyage to never return again. It hit an iceberg deep in the night...
Views: 688, Comments: 27
Last comment 10/15/2013 by Yusef1
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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: 837, 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: 970, 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: 851, 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: 749, 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: 869, Comments: 6
Last comment 11/02/2013 by ronseto
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Other Blog Entries of Interest

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: 258, 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: 425, 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: 689, 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: 393, 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: 783, Comments: 33
Last comment 01/02/2014 by artsmith

Detective Work On An Exploded Warbow

07/11/2013 posted in Workbench Creations
by Del the cat
It's often impossible to actually work out how and why a bow explodes. But this time I think I know! I was building a copy of a Mary Rose Warb...
Views: 899, Comments: 13
Last comment 07/14/2013 by lyn