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03/08/2015 12:00 AM

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Section Forums

General Discussion

13564 threads, 241390 comments (15 Viewing)

The All Sleeping Problems 1 Solution Sleep Well & Easier Faster

03/28/2015 by fionashin
Shirt her for surely and this likewise functions admirably for me is snatching book standard employment its ideal to book my eyes begin to get each I...
Views: 11, Comments: 1
Last comment 03/28/2015 by Randall

earthing for solar power palnt

03/28/2015 by kamatchi0515
sir, I had done the AC earthing & Dc earthing calculation,In solar power plant is there any specific calculation for Calculating the no.of earth...
Views: 13, Comments: 1
Last comment 03/28/2015 by Crabtree

Sleep Supplement times more to produce

03/28/2015 by lorenarandi2
Because 8 to ten times more to produce a whole food vitamin C why because when we produce whole food supplements and have companies do that for us th...
Views: 11, Comments: 1
Last comment 03/28/2015 by Tornado

Doing it cocked can solely frustrate you

03/28/2015 by leahjuriya
I was aiming to leave the web site after I noticed the pictorial message "Test Drive For $1″. basically, you'll receive 2 specialist review si...
Views: 21, Comments: 2
Last comment 03/28/2015 by Codemaster

Distance Between Two Objects

03/27/2015 by Durga prasad
Hello everyone Is there any technology so that we can estimate the distance between two objects from being far. Is there any kind of binaculors to...
Views: 165, Comments: 19
Last comment 03/28/2015 by Crabtree
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Commercial Space

1840 threads, 3399 comments (0 Viewing)

Tips on Hiring a Scientific Consultant?

03/25/2015 by Autobroker
Our community is looking to hire a consultant who will help us create a system to test the air quality in our community (maybe at different locations...
Views: 14, Comments: 0

May Vary Around the World

03/24/2015 by haroldboond
This post was deleted because it contained advertising outside the Commercial Space forum. Please review Section 14 of the CR4 Site FAQ about advertis...
Views: 23, Comments: 0

Worthy of Note

03/24/2015 by NotUrOrdinaryJoe
A new free website by the name of has just appeared. It is intended to share what everyone needs more of than they know. Nothing to buy,...
Pathfinder Tags: Giving Thanks
Views: 23, Comments: 0

Presenting Hoecker Polytechnik

03/17/2015 by olaf_s
Hello everybody, we want to present our company that produces various products in the space of mechanical engineering. We produce extraction systems,...
Views: 36, Comments: 0

Protective Storage for Blueprints and Rolled Documents

03/03/2015 by rhinotube
Can storing blueprints and other rolled documents be difficult? We manufacture a triangular plastic storage tube that can store rolled documents,...
Views: 154, Comments: 8
Last comment 03/04/2015 by jack of all trades
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CR4 Feedback

619 threads, 10943 comments (2 Viewing)

CR4 Search Precedence

03/24/2015 by JavaHead
Upon doing a web search, via various engines, for 'Engineering Forums' I found that CR4 doesn't show up until Page 3 (utilizing default search engine...
Views: 159, Comments: 13
Last comment 03/27/2015 by tommm

Membership Details

03/12/2015 by Gwen.Stouthuysen
It might have been answered before but how can I change the mail adress my CR4 membership is coupled to? My actual adress is coupled to my previous e...
Views: 109, Comments: 3
Last comment 03/12/2015 by SavvyExacta
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Section Blogs

Editor's Desk

9 blog entries, 51 comments (1 Viewing)

Goodyear's Concept Might Change How You Think About Auto Tires

03/26/2015 by wagman262
Car tires are usually ho-hum. But Kevin Harrigan writes at Engineering360 that a lot of media buzz at this year's Vienna Auto Show was around concept...
Views: 206, Comments: 7
Last comment 03/27/2015 by Phys

Yellow Line, Green Turf: The Innovations that Drove Sport Action Tracking

03/24/2015 by wagman262
Bill Schweber has written a really interesting article that moves our series on engineering innovation well down the field. His topic? That yellow lin...
Views: 100, Comments: 6
Last comment 03/27/2015 by Wal

Help IHS Explore Issues Related to the U.S. HVAC Controls Market

03/11/2015 by wagman262
To build on its understanding of the building automation and HVAC controls market, IHS is trying to develop a more in-depth understanding around the c...
Views: 96, Comments: 0
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Animal Science

212 blog entries, 1932 comments (0 Viewing)

A Fishy Mystery

03/24/2015 by Chelsey H
So admittedly I have never thought of this before, but do fish get out of breath? Fish rely on their gills to remove oxygen from the water. Gills ar...
Views: 268, Comments: 9
Last comment 03/26/2015 by truth is not a compromise

The Science of Your Bird Feeder

01/16/2015 by SavvyExacta
Winter is a quiet time outdoors in the Northeastern USA, but a bird feeder brings chirping visitors back in the colder months. Feeding the birds is...
Views: 302, Comments: 6
Last comment 01/19/2015 by adreasler

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: 763, Comments: 11
Last comment 01/16/2015 by Phys
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The Engineer's Notebook

332 blog entries, 5386 comments (0 Viewing)

Mars Plumes

03/17/2015 by CR4 Guest Author
Speculation is rampant, but offers no solid conclusion regarding the plumes of supposed clouds that amateur astronomers documented rising from a lar...
Views: 163, Comments: 1
Last comment 03/19/2015 by Cigarshaped

The Universe Forever

02/19/2015 by HUSH
Growing up, my mother taught me a nursery rhyme that helped me remember the order of the planets. "Many very early men jump straight up near Pluto."...
Pathfinder Tags: big bang cosmology Singularity universe
Views: 227, Comments: 3
Last comment 02/20/2015 by redfred

Moving On from Planet Earth

01/07/2015 by HUSH
Where do you want to live? Only two weeks into another New York winter, let's just say I'm ready for Florida. Or at least Florida weather, even if t...
Pathfinder Tags: Exoplanet habitability Mars Venus
Views: 226, Comments: 2
Last comment 01/09/2015 by Kulas
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The CR4 Admin Blog

74 blog entries, 1257 comments (0 Viewing)

Twitter Chat: What Does it Mean to Be an Engineer?

03/15/2015 by SavvyExacta
BigBeacon (a movement to transform engineering education) is hosting a Twitter chat on Wednesday, March 18. The overall theme of the chat has to do wi...
Views: 230, Comments: 30
Last comment 03/25/2015 by Wal

CR4 Member Titles

03/13/2015 by SavvyExacta
The CR4 member titles appear beneath user names and are associated with the number of posts a user has made. The current titles are: * 0 - Browser...
Views: 293, Comments: 41
Last comment 03/24/2015 by James Stewart

How to Join a CR4 User Group

03/07/2015 by SavvyExacta
Did you ever wonder how some members got to have icons in their profile that display next to their posts? These graphics are called badges, and they...
Pathfinder Tags: CR4 Tutorial
Views: 146, Comments: 3
Last comment 03/12/2015 by Kris
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What Is It?

61 blog entries, 1636 comments (0 Viewing)

What is It? for March 12, 2015

03/12/2015 What is this? This image was submitted by JIMRAT. Please feel free to submit your own images for future use on this blog.
Pathfinder Tags: what is it
Views: 343, Comments: 4
Last comment 03/20/2015 by James Stewart
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Notes & Lines

19 blog entries, 126 comments (0 Viewing)

Vinyl: No Longer Just for Audiophiles?

03/12/2015 by Jonathan Fuller
Music biz writers scrambled to their blogs in January 2015, when Nielsen SoundScan announced that 2014 vinyl sales had come in at 9.2 million units...
Pathfinder Tags: analog recording audio vinyl records
Views: 170, Comments: 9
Last comment 03/16/2015 by texasron

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: 554, Comments: 15
Last comment 01/09/2015 by Hardknock

For Love of the Index

05/09/2014 by Jonathan Fuller
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: 388, Comments: 0
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Defense & Security Technology

81 blog entries, 1214 comments (0 Viewing)

F-35 Goes "Top Gun"

03/06/2015 by Chelsey H
The F-35C naval variant of the Lightning II Joint Strike Fighter completed its first carrier trials at the end of 2014. For two weeks in November, p...
Views: 354, Comments: 5
Last comment 03/10/2015 by James Stewart

Velocitas Eradico (I, Who Am Speed, Eradicate)

02/11/2015 by HUSH
Guns are so early 20^th century. Depending on country and culture, they may even be so 19^th century. Yes, they remain the primary means of personal...
Pathfinder Tags: defense navy railgun weapon
Views: 257, Comments: 10
Last comment 02/16/2015 by Del the cat

Military Radar Data Reduces Baltic Collision Risks

01/29/2015 by IHS GlobalSpec eNewsletter
The Estonian and Finnish military forces are now sharing Baltic area radar information with civilian air traffic control agencies. The move is prompte...
Views: 153, Comments: 0
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Challenge Questions

325 blog entries, 27503 comments (0 Viewing)

3464-Cube: Newsletter Challenge (March 2015)

02/28/2015 This month's Challenge Question: Specs & Techs from IHS Engineering360: A 2-cube (square) has 4 vertices and 4 edges. A 3-cube (cube) has 8 vert...
Pathfinder Tags: challenge question characteristic cube Euler
Views: 1228, Comments: 21
Last comment 03/17/2015 by Halsey

Jovian System: Newsletter Challenge (February 2015)

02/01/2015 This month's Challenge Question: Specs & Techs from IHS Engineering360: It's 2045 and a group of space pioneers are on an interplanetary transpo...
Pathfinder Tags: challenge question
Views: 1895, Comments: 39
Last comment 02/18/2015 by James Stewart

Launch Location: Newsletter Challenge (January 2015)

01/01/2015 This month's Challenge Question: Specs & Techs from IHS Engineering360: The Kennedy Space Center at Cape Canaveral is located at latitude 28.5°...
Pathfinder Tags: challenge question
Views: 1585, Comments: 11
Last comment 01/13/2015 by Jorrie
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The Standard

4 blog entries, 13 comments (0 Viewing)

New ISO Energy Management Standard Released

11/18/2014 by KevinCassidy
The International Organization for Standardization (ISO) has released the new ISO 50003:2014 Energy management systems - Requirements for bodies provi...
Pathfinder Tags: ANSI audit certification Energy energy standards ...
Views: 138, Comments: 0

Follow up: Women's Lacrosse Headgear Standard Set for Second Ballot

11/13/2014 by KevinCassidy
I wrote about the debate between the Florida High School Athletic Association and US Lacrosse over the use of helmets during high school girls lacross...
Pathfinder Tags: ANSI ASTM eye protection face florida ...
Views: 121, Comments: 1
Last comment 01/28/2015 by sporteyes

Don't Forget to "Look Before You Pump"

11/05/2014 by KevinCassidy
The Outdoor Power Equipment Institute (OPEI) has been active in educating consumers about the variety of fuels available at the pump, and how to ident...
Pathfinder Tags: ANSI automotive E10 E15 equipment ...
Views: 213, Comments: 8
Last comment 11/08/2014 by tcmtech
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61 blog entries, 517 comments (0 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: 413, Comments: 19
Last comment 02/23/2015 by machia0705
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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: 604, 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: 452, 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: 602, Comments: 15
Last comment 08/13/2014 by suresh sharma
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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: 628, Comments: 11
Last comment 07/22/2014 by SavvyExacta
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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: 683, Comments: 3
Last comment 05/11/2014 by europium mkII
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Other Blog Entries of Interest

Mars Opportunity Defies Expectations

03/27/2015 posted in Roger's Equations
by Roger Pink
The Mars rover Opportunity landed on the Mars' Meridani Planum on January 25, 2004. Opportunity has traveled 26.2 miles during its nearly 11 years on...
Views: 70, Comments: 3
Last comment 03/27/2015 by CaptMoosie

Caption This for 03/27/15

03/26/2015 posted in Caption This!
by Kaplin
This week's image: Be sure to vote for your favorite caption! Thanks to Nigh for submitting this image.
Pathfinder Tags: Caption this engineering images funny images
Views: 370, Comments: 52
Last comment 03/28/2015 by Tom_Consulting

Caption This for 03/20/15

03/19/2015 posted in Caption This!
by Kaplin
This week's image: Be sure to vote for your favorite caption! Thanks to Nigh for submitting this image.
Pathfinder Tags: Caption this catch engineering images funny images
Views: 556, Comments: 37
Last comment 03/24/2015 by Anonymous Poster

The Space Between

03/19/2015 posted in Roger's Equations
by Roger Pink
Homo Sapiens We humans, as a species, tend to view the universe human-centrically (how else?). Yet as we learn more and more about the universe and g...
Views: 272, Comments: 13
Last comment 03/26/2015 by James Stewart

3D Printing Speeds Up

03/17/2015 posted in Roger's Equations
by Roger Pink
3D Printing Growth As I have discussed in an earlier blog post, there are strong signs that the 3D printing industry will continue to have exponentia...
Views: 129, Comments: 1
Last comment 03/18/2015 by Rixter

The Pi Day of the Century

03/14/2015 posted in Roger's Equations
by Roger Pink
- Happy National Pi Day! - Today, 3/14, is National Pi Day, an annual celebration of that most famous of mathematical constants, Pi. The celebration...
Views: 439, Comments: 16
Last comment 03/16/2015 by horace40