CR4 - The Engineer's Place for News and Discussion®

See all Forum Threads

Section Forums

General Discussion

13490 threads, 239270 comments (8 Viewing)

Nuclear Power Needs to Double to Curb Global Warming

01/31/2015 by SolarEagle
"The International Energy Agency and the Nuclear Energy Agency suggest in a report released Thursday that nuclear will have such a significant role to...
Views: 52, Comments: 5
Last comment 02/01/2015 by C-Mac

more hydrogen from solar

01/31/2015 by Fredski
several months ago I posted extensively on the work of Dan Nocera. Lockheed bought out the company and all its patents, contracts etc. as I expected c...
Views: 73, Comments: 2
Last comment 01/31/2015 by 70AARCuda

Chinese Highways

01/31/2015 by kevinm
Just a few highways in China that would be an interesting drive. View all the slides for an awesome show. I cannot figure out the innovative intersec...
Views: 90, Comments: 7
Last comment 01/31/2015 by Nigh

By charitable your head while by good

01/31/2015 by ggcheriieflowers
By charitable your head while by good energy this kind of dietary formula will be able to stretch your cognitive working and also it increase your hea...
Views: 79, Comments: 12
Last comment 01/31/2015 by C-Mac

Dreaming driving a black truck

01/31/2015 by Anonymous Poster
I went to sleep and suddenly transit to a dream of driving a big black trailer and the sad thing is wreck the truck for a reason i did not know. The s...
Views: 84, Comments: 8
Last comment 02/01/2015 by spaceracer
Go to this Forum

Commercial Space

1834 threads, 3376 comments (0 Viewing)

Complex Metal Parts Manufacturer From China

01/23/2015 by hzhzmim
Hi, we are a chinese metal parts manufacturer. We're occupied in metal injection moulding technology. We're established on 2009, specializes in the pr...
Views: 47, Comments: 0

Aircraft Installation Electrician

01/23/2015 by btbsilent
Aircraft Installation Electrician BAE Systems Military Air & Information are currently recruiting for a number of Aircraft Installation Electri...
Views: 7, Comments: 0

Any One Want To Be Our Distributor

01/19/2015 by JASU CNC
JASU International Machinery Group JASU International Machinery Group,held by Sunny(HK) Group, was founded based on the cooperation of TaiWan and...
Views: 29, Comments: 0
Go to this Forum

CR4 Feedback

616 threads, 10875 comments (0 Viewing)

I Get Enough Spam Already - Thank You

01/07/2015 by Phys
What is with all the advertising in the General Forum recently? The first two I see today definitely are, and one of them sounds like it was written b...
Views: 139, Comments: 11
Last comment 01/12/2015 by Anonymous Hero

Off Topic Ratings

01/03/2015 by gringogreg
I have noticed a number of members complaining that their well thought out (if not brilliant) replies are being rated "Off Topic". Some of the more pa...
Views: 92, Comments: 10
Last comment 01/03/2015 by lyn
Go to this Forum

See all Blog Entries

Section Blogs

Caption This!

292 blog entries, 12572 comments (0 Viewing)

Caption This for 01/30/15

01/29/2015 by Kaplin
This week's image: Be sure to vote for your favorite caption! Thanks to Sid_Sidow for submitting this image.
Pathfinder Tags: Caption this engineering images funny images lab
Views: 376, Comments: 23
Last comment 01/31/2015 by Anonymous Hero

Caption This for 01/23/15

01/22/2015 by Kaplin
This week's image: Be sure to vote for your favorite caption! Thanks to luyombya for submitting this image.
Pathfinder Tags: Caption this engineering images funny images sleeping on the job
Views: 503, Comments: 24
Last comment 01/27/2015 by North of 60

Caption This for 01/16/15

01/15/2015 by Kaplin
This week's image: Be sure to vote for your favorite caption! Thanks to luyombya for submitting this image.
Pathfinder Tags: Caption this construction engineering images funny images saw
Views: 613, Comments: 40
Last comment 01/21/2015 by North of 60
Go to this Blog

Animal Science

211 blog entries, 1923 comments (0 Viewing)

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: 250, 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: 731, Comments: 11
Last comment 01/16/2015 by Phys

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: 574, Comments: 5
Last comment 05/02/2014 by lyn
Go to this Blog

Roger's Equations

95 blog entries, 1176 comments (0 Viewing)

Cool GIF Series: Apollo 12 Saturn V Rocket Stage Orbital Path

01/08/2015 by Roger Pink
On November 14, 1969, the Apollo 12 mission was launched. The Saturn V launch vehicle for the Apollo 12 mission had several stages, including the S-IV...
Views: 367, Comments: 14
Last comment 01/14/2015 by redfred

Top 5 Favorite Blogs/Articles from 2014

01/04/2015 by Roger Pink
Hello all! I went into my archives and picked out my top 5 favorite blogs/articles I wrote last year. I'm looking forward to writing some more in...
Views: 121, Comments: 1
Last comment 01/04/2015 by Rixter

What Do Turkey Timers and Sprinkler Systems Have in Common?

12/23/2014 by Roger Pink
Fusible Alloys Fusible alloys or low-melting alloys have some interesting properties, but often are overlooked. Their solidification characteri...
Views: 184, Comments: 2
Last comment 12/24/2014 by Nigh
Go to this Blog

The Engineer's Notebook

330 blog entries, 5382 comments (0 Viewing)

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: 176, Comments: 2
Last comment 01/09/2015 by Kulas

Fun Things on the Internet - Happy New Year!

12/31/2014 by Chelsey H
52 Things you Thought Were True (But Really Aren't) - This was a little upsetting. Did you know that the chewy base of gum is indigestible and passe...
Views: 333, Comments: 0

Nerdy Gifts

12/13/2014 by Chelsey H
Yay Christmas! Shopping for the fantastic nerd in your life? Here are some ideas to help you find that perfect thing for your favorite nerd. 1/2/3...
Views: 289, Comments: 8
Last comment 12/16/2014 by texasron
Go to this Blog

Challenge Questions

323 blog entries, 27443 comments (1 Viewing)

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: 10, Comments: 0

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: 1472, Comments: 11
Last comment 01/13/2015 by Jorrie

Autumnal Glow: Newsletter Challenge (December 2014)

12/01/2014 This month's Challenge Question: Specs & Techs from IHS Engineering360: It is a new moon and Lee is taking a predawn stroll on a beach on the ea...
Pathfinder Tags: challenge question
Views: 2032, Comments: 63
Last comment 12/21/2014 by WilhelmHKoen
Go to this Blog

The CR4 Admin Blog

71 blog entries, 1178 comments (0 Viewing)

CR4 Highlights from 2014 & Plans for 2015

12/29/2014 I can't believe another year is drawing to a close. So many things happened in 2014 that I wanted to take a moment to highlight them before we move o...
Views: 130, Comments: 7
Last comment 01/01/2015 by Kris

CR4 Feature Requests - Share Them Here

12/23/2014 As promised, here's your chance to give your CR4 wishlist to Santa! What would you like to see on CR4? Quoting someone else's post? No more anonymous...
Views: 257, Comments: 61
Last comment 01/10/2015 by James Stewart

CR4 Bugs - Share Them Here

12/22/2014 Here's your chance to vent - what's broken on CR4? For example, I know that a number of users cannot post pictures. Please share anything that's not...
Views: 299, Comments: 46
Last comment 01/06/2015 by Hilton
Go to this Blog

Editor's Desk

2 blog entries, 32 comments (0 Viewing)

Innovation/Disruption as Part of the Engineering Design Process

12/16/2014 by wagman262
The Engineering360 editors are interested in better understanding how innovation and disruption play roles in the product/project design cycle. As a s...
Pathfinder Tags: design disruption innovation product
Views: 134, Comments: 4
Last comment 12/18/2014 by wagman262

As an Engineer, What's Your Biggest Challenge?

12/15/2014 by wagman262
More than 2,100 engineers and allied professionals from around the world took part in the first annual IHS Engineering360 "Pulse of Engineering" res...
Views: 296, Comments: 28
Last comment 12/21/2014 by Davesets
Go to this Blog

Defense & Security Technology

79 blog entries, 1198 comments (1 Viewing)

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: 94, Comments: 0

Will the U.S. Navy Build the World's Only Supercavitating Ship?

12/10/2014 by HUSH
For the good of everyone, major combat operations by a military navy haven't occurred in decades. Though expeditionary exercises in support of air a...
Pathfinder Tags: defense ghost navy supercavitate
Views: 508, Comments: 30
Last comment 12/18/2014 by cuba_pete

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: 271, Comments: 2
Last comment 09/29/2014 by Wrench twirler
Go to this Blog

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: 119, 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: 111, 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: 202, Comments: 8
Last comment 11/08/2014 by tcmtech
Go to this Blog


61 blog entries, 516 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: 365, Comments: 18
Last comment 11/03/2014 by Lynn.Wallace

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: 609, Comments: 2
Last comment 03/06/2014 by texasron
Go to this Blog

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: 514, 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: 416, 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: 566, Comments: 15
Last comment 08/13/2014 by suresh sharma
Go to this Blog

Notes & Lines

18 blog entries, 117 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: 504, Comments: 15
Last comment 01/09/2015 by Hardknock

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: 360, 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: 875, Comments: 8
Last comment 04/02/2014 by Calnet42
Go to this Blog

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: 578, Comments: 11
Last comment 07/22/2014 by SavvyExacta
Go to this Blog

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: 613, Comments: 3
Last comment 05/11/2014 by europium mkII
Go to this Blog

What Is It?

60 blog entries, 1629 comments (0 Viewing)

What Is It? for 2/28/2014

02/28/2014 What is this stuff?
Views: 993, 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: 1105, Comments: 72
Last comment 12/22/2014 by Original_Macgyver

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: 968, Comments: 19
Last comment 03/06/2014 by steven phaneuf
Go to this Blog

Great Engineers & Scientists

144 blog entries, 499 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: 987, Comments: 18
Last comment 02/21/2014 by suresh sharma
Go to this Blog

Other Blog Entries of Interest

HTRN's Cosmology Questions

01/17/2015 posted in Relativity and Cosmology
by Jorrie
in HTRN's thread about the rate of bubble rise and expansion in a fluid, he also saw analogies to cosmological expansion and he speculated: "Maybe we...
Pathfinder Tags: cosmological constant cosmology expansion
Views: 161, Comments: 6
Last comment 01/20/2015 by HiTekRedNek

Scrap Metal Wire Stripper

12/12/2014 posted in Workbench Creations
by frankd20
I have been working on a lot of building projects, with not much time for anything else these last few years. As part of these projects, I ended up...
Pathfinder Tags: copper wire recycling wire stripper
Views: 394, Comments: 8
Last comment 12/18/2014 by C-Mac

Heavyweights Flexing BICEP Muscles

11/30/2014 posted in Relativity and Cosmology
by Jorrie
I posted a Blog entry in Jan 2011 on the Colliding Branes Cosmic Model, in which the ideas of Neil Turok and Paul Steinhardt were discussed. Their...
Pathfinder Tags: cosmology Cyclic model inflation
Views: 191, Comments: 1
Last comment 12/01/2014 by Anonymous Hero

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: 280, 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: 416, 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: 552, Comments: 29
Last comment 09/26/2014 by James Stewart