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06/26/2016 12:00 AM

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Section Forums

General Discussion

14571 threads, 265507 comments (16 Viewing)

Name the Skyline

06/27/2016 by Fredski
Views: 59, Comments: 13
Last comment 06/28/2016 by PWSlack

Common Core Math - An Engineering Dad's Nightmare (Take Two)

06/27/2016 by 8320
Some of you may remember my rant about Common Core math from last November. Well, this article on the results of the New York Common Core Algebra Rege...
Pathfinder Tags: algebra common core math regents
Views: 120, Comments: 28
Last comment 06/27/2016 by Rixter

Nitinol Engine

06/26/2016 by SolarEagle
This seems to be a simple device for harnessing heat energy to mechanical work....I wonder if it could be scaled up..?
Views: 137, Comments: 10
Last comment 06/27/2016 by phoenix911

Arctic and Antarctic Sea Ice - Two Cool Interactive Charts

06/26/2016 by Bayes
Forgive the pun in the title! Anyway, I came a across these cool interactive charts on the arctic and antarctic sea ice extents in their respective He...
Views: 226, Comments: 14
Last comment 06/28/2016 by IdeaSmith
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Commercial Space

1931 threads, 3679 comments (0 Viewing)

Android MCQ application

06/16/2016 by Neerav B
Hi I have created a MCQ application (Android) for Electrical Engineering and uploaded it on Google Play store. It is good for competitive exams. It i...
Views: 49, Comments: 0

Android MCQ application

06/16/2016 by Neerav B
I have developed an android MCQ application and it is uploaded on play store as a free application without any ads. Can I share my application link he...
Views: 75, Comments: 4
Last comment 06/16/2016 by PWSlack
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CR4 Feedback

672 threads, 11689 comments (0 Viewing)

How to Cancel Subscription

06/19/2016 by Anonymous Poster
please let me know how to cancel my subscription for this website
Views: 83, Comments: 5
Last comment 06/20/2016 by Brave Sir Robin

Firefox Can't Do Pics

06/12/2016 by JIMRAT
This message box contains no tools. I just posted via Chrome and this box had all the familiar tools including add pics , vids and edit tools. I am po...
Pathfinder Tags: posting pics in firefox
Views: 90, Comments: 4
Last comment 06/14/2016 by JIMRAT

Thoughts On CR4 Mobile Website

06/08/2016 by Bayes
I have to admit I'm a fan. Really can read CR4 on the phone now. Long overdue.
Views: 177, Comments: 18
Last comment 06/15/2016 by WJMFIRE

My Contributions

06/05/2016 by xyz
Have you stopped logging in my contributions to forum thread or blogs for sometime? I ahd started a thread on Van de Graff generator as well as how c...
Views: 62, Comments: 3
Last comment 06/06/2016 by SavvyExacta
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See all Blog Entries

Section Blogs

Caption This!

366 blog entries, 15746 comments (3 Viewing)

Caption This for 6/24/16

06/23/2016 by LakeGrl
------- This week's image: Be sure to vote for your favorite caption!
Pathfinder Tags: engineering images engineers life funny images golf carts ladders
Views: 395, Comments: 32
Last comment 06/28/2016 by JohnDG

Caption This for 6/17/16

06/16/2016 by LakeGrl
This week's image: Be sure to vote for your favorite caption! Thanks to Nigh for submitting this image.
Pathfinder Tags: civil engineering engineering images engineering life funny images
Views: 491, Comments: 43
Last comment 06/24/2016 by MR. Guest
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The Engineer's Notebook

363 blog entries, 5658 comments (0 Viewing)

The Latest Tech for Sharkproofing Beaches

06/20/2016 by Jonathan Fuller
Next month marks 100 years since the Jersey Shore shark attacks. A rogue shark (or multiple sharks, depending on which scientist you ask) killed four...
Pathfinder Tags: shark attacks sharks
Views: 333, Comments: 1
Last comment 06/20/2016 by Rixter

Coral Bleaching

06/03/2016 by BestInShow
Snorkeling along part of Bermuda's coral reef was one of the highlights of my recent trip to the island. Given the dire state of corals around the w...
Pathfinder Tags: bermuda coral bleaching sunscreen
Views: 228, Comments: 4
Last comment 06/08/2016 by James Stewart
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Animal Science

225 blog entries, 2080 comments (0 Viewing)

Mosquito PSA

06/15/2016 by Chelsey H
Hooray for summer! Get ready for the glorious sun, warm late-night campfires, beaches, and…. mosquitos. Ugh. With mosquito-borne diseases lik...
Views: 192, Comments: 1
Last comment 06/17/2016 by Mr. small

New Species of 2016

06/09/2016 by Chelsey H
Every year on Carolus Linnaeus’s (the father of modern taxonomy) birthday, the International Institute for Species Exploration releases its list...
Views: 338, Comments: 4
Last comment 06/13/2016 by LakeGrl
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The CR4 Admin Blog

95 blog entries, 1454 comments (1 Viewing)

Create a CR4 Shortcut on Your Smartphone

06/14/2016 by SavvyExacta
CR4 doesn't have an app, but as of last week it is mobile-friendly, and you can easily add a shortcut (that looks like an app button) to your smartpho...
Pathfinder Tags: CR4 Tutorial
Views: 100, Comments: 2
Last comment 06/19/2016 by markydaren

New Text Formatting Toolbar

06/08/2016 by SavvyExacta
Introducing our new text editor! The CR4 toolbar for writing a new post has a new look. Most of the functionality you are used to is still available....
Pathfinder Tags: CR4 Tutorial
Views: 188, Comments: 19
Last comment 06/14/2016 by English Rose
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Defense & Security Technology

102 blog entries, 1496 comments (0 Viewing)

Drones Could Blacken Battlefield Skies

06/12/2016 by Engineering360 eNewsletter
The U.S. DARPA (Defense Advanced Research Projects Agency) has awarded the first contracts for its aerial Gremlins Program to develop "volleys" of UAS...
Views: 202, Comments: 11
Last comment 06/14/2016 by Rixter

Camo Fabric Changes Color

05/12/2016 by Engineering360 eNewsletter
Developers at China's Nanjing Tech University have created an organic polymer fabric that uses voltage application to change color. The material was...
Views: 147, Comments: 0
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TechnoTourist’s Engineering Expeditions

81 blog entries, 483 comments (0 Viewing)

Paris's Sewer System

06/10/2016 by joeymac
I’ve just returned from a trip to Europe and one of my stops was in Paris, France. We got poured on pretty good there, but I must admit that I f...
Pathfinder Tags: Belgrand boules de curage iron balls Paris sanitation ...
Views: 650, Comments: 22
Last comment 06/15/2016 by adreasler
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Editor's Desk

81 blog entries, 285 comments (0 Viewing)

Inside Switzerland's Gotthard Base Tunnel

06/08/2016 by wagman262
Sneak peek for the CR4 engineering community! Robert Springer takes us inside the Gotthard Base Tunnel in Switzerland to learn about the engineering c...
Views: 202, Comments: 2
Last comment 06/09/2016 by SolarEagle

Collaboration Tools as a Replacement for E-Mail?

06/02/2016 by wagman262
Are you using any of the collaboration tools we discuss in this feature article at Engineering360? Which ones? What do you like and don't like about t...
Views: 135, Comments: 4
Last comment 06/05/2016 by jt
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Challenge Questions

340 blog entries, 28170 comments (1 Viewing)

Invisible Neutrino: Newsletter Challenge (June 2016)

This month's Challenge Question: Specs & Techs from IHS Engineering360: A neutrino with an energy of 14 MeV is released from a fusion reaction in...
Pathfinder Tags: challenge questions
Views: 2074, Comments: 161
Last comment 06/22/2016 by Physicist?

Permanent Magnet: Newsletter Challenge (May 2016)

This month's Challenge Question: Specs & Techs from IHS Engineering360: You have two steel bars. One is a permanent magnet and the other is not...
Pathfinder Tags: challenge questions Magnets
Views: 3669, Comments: 46
Last comment 05/24/2016 by Andy Germany
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20 blog entries, 163 comments (0 Viewing)

Makemake has a moon

05/31/2016 by Bayes
Makemake is a dwarf planet with a diameter roughly two thirds of Pluto's. Makemake is orbiting with an aphelion of 52.8 AU and a perihelion of 38.6 AU...
Views: 135, Comments: 2
Last comment 06/02/2016 by Bayes

James Webb Space Telescope Gets It's Detectors

05/29/2016 by Bayes
The James Webb Space Telescope is slated to launch in October of 2018. If successful, it will be one of the greatest engineering accomplishments of ma...
Views: 131, Comments: 2
Last comment 06/03/2016 by SolarEagle
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Notes & Lines

34 blog entries, 262 comments (0 Viewing)

Snow in June, Frost in July, Ice in August

05/09/2016 by Jonathan Fuller
This coming summer marks the 200^th anniversary of one of the most severe weather anomalies in modern history. The Year Without a Summer, as it's no...
Pathfinder Tags: 1816 climate tambora year without a summer
Views: 312, Comments: 7
Last comment 05/13/2016 by Just an Engineer

Earth Day, And Problematic Predictions

05/02/2016 by Jonathan Fuller
There are few more polarizing issues than environmental ones: climate change, the feasibility of alternative energy, and, in recent news, Earth Day....
Pathfinder Tags: earth day long now Prediction sustainability
Views: 189, Comments: 6
Last comment 05/10/2016 by Phys
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Relativity and Cosmology

147 blog entries, 3987 comments (0 Viewing)

Another Relativity "Paradox"

04/11/2016 by Jorrie
A futuristic spaceship is stationed at its base, which is static at 10 light years (ly) from Earth in free space. The ship and base clocks are rat...
Pathfinder Tags: acceleration relativity
Views: 396, Comments: 27
Last comment 06/07/2016 by tick-tock

Time Dilation and Lorentz Contraction Revisited

03/27/2016 by Jorrie
- Intro - There are many fundamental relativity discussions that are buried deep inside related threads and hence very difficult to access at a...
Pathfinder Tags: Lorentz contraction Velocity time dilation
Views: 876, Comments: 129
Last comment 06/06/2016 by ralfcis
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IHS Product Design Blog

5 blog entries, 1 comments (0 Viewing)

Engineering Webinar Calendar - April 2016

04/04/2016 by SavvyExacta
Engineering360 has a great lineup of webinars each month. Learn about specific topics from industry experts, for free, from the comfort of your own...
Pathfinder Tags: education webinars
Views: 97, Comments: 0

Webinar Calendar – January 2016

01/11/2016 by SavvyExacta
Engineering360 has a great lineup of webinars each month. Learn about specific topics from industry experts, for free, from the comfort of your own...
Pathfinder Tags: adhesives education electronics emissions pollution control ...
Views: 281, Comments: 0
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64 blog entries, 555 comments (0 Viewing)

World's Most Dangerous Dam Threatens Up to 1.5 Million

03/30/2016 by HUSH
There could be an unprecedented engineering disaster in the weeks or months ahead. Mosul Dam in north Iraq is dangerously close to collapsing, years...
Pathfinder Tags: civil enginering dam flooding grout
Views: 569, Comments: 12
Last comment 03/31/2016 by SolarEagle

Why We Need Others To Catch Our Typos

09/04/2015 by cheme_wordsmithy
If yvo'ue raed something aoubt how the brian wrkos you may konw why you can raed tihs snetecne whiuott mcuh tbruloe. I remember the first time...
Views: 637, Comments: 18
Last comment 09/11/2015 by energyconversion
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Roger's Equations

171 blog entries, 1764 comments (0 Viewing)

A Gravitational Wave Observatory in Space

03/18/2016 by Bayes
Given the recent success of LIGO detecting gravitational waves, it shouldn't be surprising there is renewed interest in the press regarding other plan...
Views: 191, Comments: 3
Last comment 03/22/2016 by Bayes

Mathematical Structures in Classical Books

01/28/2016 by Bayes
I came across this very interesting article regarding fractal structures in classical literature and thought I'd pass it along. - R - Scientists find...
Views: 319, Comments: 7
Last comment 02/03/2016 by BestInShow
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Rockaholic Adventures

49 blog entries, 598 comments (0 Viewing)

Levees Fail Again

03/10/2016 by Shawn
Lack of accurate data plagues geological predictions. Whether we are assessing climate change, tropical storm probabilities, or the significance of...
Pathfinder Tags: big old muddy levees mississippi Old River Control Structure ORCS
Views: 297, Comments: 11
Last comment 03/14/2016 by Shawn

East Coast Mourns

03/04/2016 by Shawn
I'm afraid there is an epidemic going around that has all but squandered any resemblance of a winter for portions of the East Coast of the United S...
Pathfinder Tags: 2015/2016 winter El Nino
Views: 258, Comments: 12
Last comment 03/30/2016 by westbye
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What Is It?

68 blog entries, 1860 comments (0 Viewing)

What is It? for December 16

Do you know what this is? Share your answer, below! Submitted by CR4 user Whitephone.
Pathfinder Tags: What is it?
Views: 670, Comments: 18
Last comment 12/21/2015 by Hilton

What is It? for July 26

What is it? Share your guess in the comments below! Thanks to CR4 member Nigh for sharing this image.
Views: 783, Comments: 26
Last comment 07/28/2015 by GameJudge
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Physics In Film

11 blog entries, 91 comments (0 Viewing)

Back to the Future Tech - How Do We Compare?

10/23/2015 by cheme_wordsmithy
So two days ago was October 21, 2015 - the monumental day when Marty McFly time traveled into the future in the movie Back To The Future Part II. Be...
Views: 465, Comments: 2
Last comment 10/26/2015 by adreasler

Do We Finally Get Hoverboards in 2015?

07/29/2015 by HUSH
Since skateboarding doesn't require enough agility and balance, next week Lexus will officially unveil a hoverboard. Ever since Marty McFly used a h...
Pathfinder Tags: Back to the Future hoverboard Lexus maglev
Views: 364, Comments: 4
Last comment 07/31/2015 by BabyGuinness
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Other Blog Entries of Interest

3D Printing a NASA Space Wrench - Video

02/01/2016 posted in Workbench Creations
by SavvyExacta
Watch our 3D printer create a NASA space wrench! You may have seen our previous posts explaining that we would be conducting a live Periscope broadca...
Pathfinder Tags: 3D Printing additive manufacturing NASA nasa space wrench periscope
Views: 410, Comments: 0

Electrical Engineering Master's for Busy Professionals

10/18/2015 posted in Engineering...Beyond the Classroom
by Penn State
Penn State World Campus, the online learning platform for The Pennsylvania State University, offers a 100% online, 30-credit Master of Engineering...
Pathfinder Tags: ee degree electrical engineer masters degree penn state
Views: 520, Comments: 0

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: 604, Comments: 8
Last comment 12/18/2014 by C-Mac

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: 930, Comments: 67
Last comment 07/15/2014 by europium mkII

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: 1013, Comments: 33
Last comment 01/02/2014 by artsmith