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03/08/2015 12:00 AM

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Section Forums

General Discussion

13622 threads, 242702 comments (13 Viewing)

Help from Engineer Members, Advice Sought

04/25/2015 by snowboy
Here I sit beside a dock in the far Bahamas. My 35 year old engine has a cracked piston from a defective wet elbow installation (by me )that result...
Views: 56, Comments: 7
Last comment 04/25/2015 by Unredundant

Will my Preliminary Design for Mineral Oil Submerged PC work?

04/25/2015 by 10thmtnarty
Note to mods: Please do not ban me for posting my personal copywritten work here. I know it sounds strange, but I was banned with no warning from phys...
Pathfinder Tags: acrylic custom pc mineral oil plumbing
Views: 51, Comments: 5
Last comment 04/25/2015 by 10thmtnarty

World Book Day - Share Your Favorite Book

04/23/2015 by SavvyExacta
Today is World Book Day! So share... * A favorite book * A book that influenced you * A great reference book * What you're reading now Or anythi...
Views: 164, Comments: 26
Last comment 04/25/2015 by Codemaster

Images of Massive Volcano Eruption

04/23/2015 by r&ddoc
Yesterday a massive volcanic eruption Happened in southern Chile, very close to the border of my country. The Argentinian towns and little cities wok...
Pathfinder Tags: Images of Volcano eruption
Views: 335, Comments: 14
Last comment 04/25/2015 by r&ddoc

Lathe Cuts as Tool is Wound Back

04/23/2015 by Del the cat
On my little lathe I sometimes find I'm cutting again as I wind the tool back to the right. I've spotted some causes like the tool moving slightly and...
Views: 385, Comments: 38
Last comment 04/25/2015 by JIMRAT
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Commercial Space

1849 threads, 3473 comments (0 Viewing)

Researches on Different Engineering Topics

04/15/2015 by
Hi there!My name is Ruth Evans and I am looking for dedicated engineering experts, who will assist in doing researches on different engineering topics...
Pathfinder Tags: engineering careers Engineering Task
Views: 127, Comments: 25
Last comment 04/15/2015 by Crabtree

Rigol Price Increase

04/14/2015 by MCSTestEquipment
Hello! Reminder that Rigol will be increasing their prices tomorrow (15^th April) on their range of Test & Measurement equipment. Buy yours tod...
Views: 16, Comments: 0

The Introduction of Vipeak Grinder in the Application of Comprehensive Treatment

04/13/2015 by vipeak06
Fly ash is a product of coal-fired power generation, contain heavy metals arsenic, selenium, lead and hazardous substances, can be easily carried by...
Views: 49, Comments: 4
Last comment 04/14/2015 by lyn

Barite Powder Processing

04/13/2015 by vipeak06
Barite is the most common mineral barium, its composition as barium sulfate, are widely used in the chemical industry oil well drilling, concrete fi...
Views: 48, Comments: 1
Last comment 04/13/2015 by Tornado

Increasing Life of Products with New Flash Drives

04/09/2015 by TechWonders
Extending product lifetimes with new NAND flash technologies Demand from consumer and mobile markets, automotive and industrial sectors, and emergi...
Views: 72, Comments: 0
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CR4 Feedback

623 threads, 10981 comments (0 Viewing)

Can the CR4 Software Automatically Add a "Reported" Flag to Reported Posts.

04/22/2015 by Randall
We seem to be getting an awful lot of SPAM. Some members (especially "Tornado") are very diligent about reporting the posts. The problem is that after...
Pathfinder Tags: reporting SPAM posts
Views: 134, Comments: 20
Last comment 04/24/2015 by Tornado

Private E-mail Addresses

04/19/2015 by Wick
To CR4 site---Can you advise if it is allowable /advisable/permitted on the CR4 site to mention a private email address. Sending specific material to...
Pathfinder Tags: private email address
Views: 54, Comments: 3
Last comment 04/23/2015 by PWSlack

Remove Email Subscriptions

04/18/2015 by nvmani
Sir, Please advise how to remove my subscriptions to email? Thanks, NV Mani
Views: 159, Comments: 6
Last comment 04/20/2015 by SavvyExacta

The Software Behind CR4 Discussions

04/11/2015 by Don from Oz
My local community is seeking an online discussion forum like CR4. Linkedin and Wordpress did not fire up the community and would not engage....
Views: 162, Comments: 6
Last comment 04/14/2015 by Don from Oz
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See all Blog Entries

Section Blogs

The CR4 Admin Blog

75 blog entries, 1284 comments (0 Viewing)

The Homework Question Debate

04/22/2015 We've all seen them... posts that are obviously homework questions copied directly from students' textbooks. It's understandable that nobody should ge...
Views: 343, Comments: 38
Last comment 04/25/2015 by Andy Germany

100,000th Thread Posted to CR4

04/02/2015 CR4 has reached another milestone! About one year ago the millionth comment was posted to CR4. Just last month the 100,000^th thread was posted. Th...
Views: 205, Comments: 14
Last comment 04/07/2015 by JIMRAT

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: 341, Comments: 46
Last comment 04/16/2015 by James Stewart
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Editor's Desk

10 blog entries, 63 comments (0 Viewing)

Moore's Law at 50

04/16/2015 by wagman262
Bill Schweber, one of our contributing editors, has a terrific piece on the 50th anniversary of Moore's Law. Have a look at it here and let me know wh...
Views: 218, Comments: 10
Last comment 04/23/2015 by Wal

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: 299, Comments: 9
Last comment 03/30/2015 by SolarEagle

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: 107, Comments: 6
Last comment 03/27/2015 by Wal
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Challenge Questions

326 blog entries, 27537 comments (0 Viewing)

100 Meter Dash: Newsletter Challenge (April 2015)

04/01/2015 This month's Challenge Question: Specs & Techs from IHS Engineering360: Now that good weather is around the corner, a challenge question related...
Pathfinder Tags: challenge question
Views: 1339, Comments: 34
Last comment 04/24/2015 by jdretired

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: 1434, 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: 1926, Comments: 39
Last comment 02/18/2015 by James Stewart
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Animal Science

212 blog entries, 1933 comments (1 Viewing)

Brontosaurus vs Apatosaurus

04/24/2015 by Chelsey H
When I was little one of my favorite movies was "We're Back: A Dinosaur Story". It's a ridiculous cartoon about dinosaurs showing up in a big city....
Views: 72, Comments: 1
Last comment 04/24/2015 by SavvyExacta

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: 320, 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: 309, Comments: 6
Last comment 01/19/2015 by adreasler
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The Engineer's Notebook

333 blog entries, 5391 comments (0 Viewing)

Ambiversion is the New Normal

04/21/2015 by Jonathan Fuller
Have a go at these questions using only "Sometimes," "Always," or "Never" as answers: Do you gain increased energy and fulfillment in social situat...
Pathfinder Tags: ambivert mbti personality test
Views: 142, Comments: 4
Last comment 04/23/2015 by Rixter

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: 195, 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: 234, Comments: 3
Last comment 02/20/2015 by redfred
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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: 379, Comments: 4
Last comment 03/20/2015 by James Stewart
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Notes & Lines

19 blog entries, 128 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: 204, Comments: 11
Last comment 03/29/2015 by Unredundant

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: 558, 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: 393, Comments: 0
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Defense & Security Technology

82 blog entries, 1249 comments (0 Viewing)

Warthogs Redeploy to Europe

04/24/2015 by IHS GlobalSpec eNewsletter
The end of last month was scheduled to see redeployment of 12 U.S. Air Force A-10 Thunderbolt II (unofficially "Warthog" to its crews) attack air...
Views: 137, Comments: 32
Last comment 04/25/2015 by truth is not a compromise

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: 371, Comments: 7
Last comment 04/25/2015 by Casper71

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: 266, Comments: 11
Last comment 04/16/2015 by possum
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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: 152, 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: 123, 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: 219, Comments: 8
Last comment 11/08/2014 by tcmtech
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62 blog entries, 522 comments (0 Viewing)

Big Bets Lost on Vegas Hotel

04/23/2015 by HUSH
If you're in Las Vegas, you're probably going to gamble. The city is well known for its attractions, from the resorts to the shopping to the shows t...
Pathfinder Tags: architecture las vegas structural engineering
Views: 156, Comments: 2
Last comment 04/25/2015 by Rixter

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: 437, 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: 625, 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: 456, 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: 609, 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: 651, 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: 739, Comments: 3
Last comment 05/11/2014 by europium mkII
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Other Blog Entries of Interest

Caption This for 04/24/15

04/23/2015 posted in Caption This!
by LakeGrl
This weeks image: Be sure to vote for your favorite caption! Thanks to Nigh for submitting this image.
Pathfinder Tags: Caption this engineering images funny images garage lifts
Views: 356, Comments: 45
Last comment 04/25/2015 by CaptMoosie

Caption This for 04/17/15

04/16/2015 posted in Caption This!
by Kaplin
This week's image: Be sure to vote for your favorite caption! Thanks to luyombya for submitting this image.
Pathfinder Tags: bike Caption this engineering images funny images mower
Views: 522, Comments: 49
Last comment 04/20/2015 by bob c

The Fermi Paradox

04/13/2015 posted in Roger's Equations
by Roger Pink
"By denying scientific principles, one may maintain any paradox" - Galileo Galilei The Fermi Paradox There is a paradox that states that given the v...
Views: 534, Comments: 74
Last comment 04/18/2015 by 1capybara

Caption This for 04/10/15

04/09/2015 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 gridlock traffic jam
Views: 712, Comments: 66
Last comment 04/17/2015 by Randall

String Theory and Umbral Moonshine

04/08/2015 posted in Roger's Equations
by Roger Pink
Don't Let The Name Fool You! The mathematical terms you are about to read are going to sound bizarre, but please keep in mind th...
Views: 217, Comments: 6
Last comment 04/10/2015 by StandardsGuy

The James Webb Space Telescope

04/06/2015 posted in Roger's Equations
by Roger Pink
Hubble's Successor Hello all! I've recently written an article for Engineering360 (News & Analysis Tab above) about the James Webb Space Telesc...
Views: 117, Comments: 6
Last comment 04/08/2015 by Wal