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Section Forums

General Discussion

15365 threads, 288201 comments (22 Viewing)

Science is never settled

09/24/2017 by Fredski
I call myself a man of science.I know "facts" can change.Over the years I've been ridiculed and mocked by many for my staunch stance against the CO2 t...
Views: 5, Comments: 1
Last comment 09/24/2017 by lyn

Project Woodpecker

09/23/2017 by Lehman57
Can anyone comment on "Project Woodpecker?" It is supposed to be about "Electron Cyclotron Resonance Heating Method" which can modify such things as w...
Views: 101, Comments: 9
Last comment 09/24/2017 by evanmjones

Fileinfo Problem

09/23/2017 by HiTekRedNek
I need some help getting rid of a virus that suddenly appended all of my internet shortcuts to .URL and will not open unless I choose a file to open t...
Views: 85, Comments: 6
Last comment 09/24/2017 by truth is not a compromise

Why Do Some Wine Bottles Have Punts? and Other Design Questions

09/22/2017 by BestInShow
Happy Weekend--some light reading for you. Enjoy!
Views: 158, Comments: 15
Last comment 09/24/2017 by phoenix911
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Commercial Space

1995 threads, 3801 comments (2 Viewing)

STAAD Pro Software

09/08/2017 by Suhasj123
Details about STAAD Pro: STAAD is nothing but Structural Analysis And Design. STAAD Pro programming is broadly utilized as a part of the structural a...
Views: 84, Comments: 0

Best Entertainment Laptop

08/26/2017 by Md Rakib Hasan
Laptops have grown to be an essential accessory with regard to work and for amusement. But with all the actual laptop brands currently in the marketpl...
Views: 68, Comments: 1
Last comment 08/26/2017 by JPool

Best mobile phone

08/26/2017 by Md Rakib Hasan
Using the rise in technology, there's been a massive replacement associated with ordinary phones by cell phones. Today it is probably the most efficie...
Views: 21, Comments: 1
Last comment 08/26/2017 by JPool
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CR4 Feedback

695 threads, 12085 comments (0 Viewing)

Generator AVR Replacement From 38V 1.9A to 60/80V 4A/5A

09/19/2017 by NKA
Dear All, we have 125KVA Generator, whose AVR has been burnt, Its rating was 38V, 1.9A. Can we replace with ratings 60V 4A or with 80V 5A. Thanks fo...
Views: 109, Comments: 7
Last comment 09/19/2017 by James Stewart

Message to CR4 admn - CR4 Daily Mail Not Recd. for 8th and 9th. Sept.

09/10/2017 by dhayanandhan
I have not recd. cr4 daily mail not for 8th and 9th. Sept. I do not know whether other cr4 members recd. and this problm is only for me. I am fully...
Views: 153, Comments: 4
Last comment 09/11/2017 by yamdankee

Information on UPS

08/31/2017 by odezimesteve
We have a Chloride 70 Net 20KVA 3 phase online UPS that is faulty. Any one out there that can help with a link where we can get spare PCBs to repair...
Views: 156, Comments: 6
Last comment 09/01/2017 by James Stewart
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Section Blogs

The Engineer's Notebook

436 blog entries, 7239 comments (0 Viewing)

Advice from the Locals

09/16/2017 by M-ReeD
Having come of age in a town that was (and continues to be) a major attraction for sports enthusiasts, I understand the adolescent joy derived from &l...
Views: 205, Comments: 3
Last comment 09/21/2017 by Rixter

Are America's National Parks Too Popular?

09/14/2017 by Hannes
As my kids have gotten older, hiking has become one of our favorite activities. I live a short ways from the Adirondack Mountains and Adirondack Park,...
Views: 277, Comments: 16
Last comment 09/19/2017 by Hannes
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WoW Blog (Woman of the Week)

199 blog entries, 576 comments (0 Viewing)

Woman of the Week – Bessie Coleman

09/18/2017 by lmno24
Bessie Coleman was the first African American woman to stage a public flight in America and first to hold a pilot’s license. Born to a family o...
Views: 186, Comments: 3
Last comment 09/22/2017 by James Stewart

Woman of the Week – Rebecca Lee Crumpler

09/11/2017 by lmno24
Rebecca Lee Crumpler is best known for being the first African-American woman physician in the United States. She was born in Delaware in 1831, but g...
Views: 228, Comments: 4
Last comment 09/14/2017 by SolarEagle
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"On This Day" In Engineering History

243 blog entries, 844 comments (0 Viewing)

September 4, 1926 – The Death of Julia Brainerd Hall

09/04/2017 by MaggieMc
On September 4, 1926, Julia Brainerd Hall, who assisted her brother Charles Martin Hall in producing the first samples of man-made aluminum in 1886, d...
Views: 309, Comments: 2
Last comment 09/07/2017 by James Stewart

April 19, 1906—The Death of Nobel Prize Laureate Pierre Curie

04/19/2017 by MaggieMc
Thinking back to science class, Curie is a familiar name. Marie Curie is a favorite subject in many courses, especially due to organizing mobile X-ray...
Views: 415, Comments: 2
Last comment 04/20/2017 by MaggieMc
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Challenge Questions

356 blog entries, 28565 comments (0 Viewing)

Turbofan Tips: Newsletter Challenge (September 2017)

This month's Challenge Question: Specs & Techs from GlobalSpec: The low-pressure rotor of a PW100G-JM turbofan engine spins at a maximum rpm of 1...
Views: 949, Comments: 19
Last comment 09/07/2017 by dkwarner

Mystery of the Part-time Stud Finder: Newsletter Challenge (August 2017)

This month's Challenge Question: Specs & Techs from GlobalSpec: Steve recently moved into a new apartment and wants to use his father’s stu...
Views: 3403, Comments: 30
Last comment 09/05/2017 by James Stewart
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Abe's Blog

6 blog entries, 194 comments (0 Viewing)

Race Tracks Are Not Good For The Horses

08/01/2017 by amichelen
Now, in the middle of the boreal summer, the sad story of the horses at race tracks like in Saratoga Springs, comes to mind. On average 24 horses die...
Views: 1157, Comments: 125
Last comment 08/14/2017 by amichelen

Hypatia of Alexandria – Part 3

11/15/2016 by amichelen
(Note: This is last part of Hypatia of Alexandri) Personal life If we have little knowledge of her scientific achievements, we know even less about...
Views: 362, Comments: 35
Last comment 11/19/2016 by TimONeill
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Notes & Lines

44 blog entries, 407 comments (0 Viewing)

Black Hole Music and Really Low Notes

07/13/2017 by Hannes
A colleague of mine recently heard from a friend that certain black holes make musical pitches—specifically, scientists have observed a black ho...
Views: 404, Comments: 30
Last comment 07/19/2017 by Rixter

What Did The Past Sound Like?

06/15/2017 by Hannes
Growing up in the early ‘90s, my family still had a big cream-colored rotary phone stuck to our kitchen wall. At the time I didn’t realize...
Views: 484, Comments: 40
Last comment 07/13/2017 by phoenix911
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Defense & Security Technology

117 blog entries, 1655 comments (0 Viewing)

Multi-touch System Allows Navy Flight Decks to Shuffle Configurations

06/26/2017 by Engineering360 eNewsletter
The systems, designated the Deployable Ship Integration Multitouch Systems, upgrade the "Quija board" currently used to organize hanger bays by allowi...
Views: 174, Comments: 0

Autonomous, Reusable Experimental Spacecraft Being Developed by Boeing and DARPA

06/05/2017 by Engineering360 eNewsletter
Boeing is collaborating with the U.S. Defense Advanced Research Projects Agency (DARPA) to design and test an experimental spaceplane capable of reach...
Views: 198, Comments: 0
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45 blog entries, 409 comments (0 Viewing)

Physicists Create a Fluid With Negative Mass

04/20/2017 by Bayes
One of the interesting things you learn early on in physics is that there is nothing in physics that forbids negative mass values. There has long been...
Views: 869, Comments: 53
Last comment 07/24/2017 by James Stewart

NASA Announcement Today on Potential Habitats for Alien Life

04/13/2017 by Bayes
NASA Announcement Today at 2 p.m. EDT NASA will discuss new results about ocean worlds in our solar system from the agency’s Cassini spacecraft...
Views: 173, Comments: 1
Last comment 04/17/2017 by James Stewart
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Editor's Desk

95 blog entries, 362 comments (0 Viewing)

Engineering Job Growth Shows Positive Outlook

04/08/2017 by Engineering360 eNewsletter
The most recent projections from the U.S. Bureau of Labor Statistics concur that jobs in engineering, and other STEM fields, would likely provide the...
Views: 268, Comments: 0

3D-printed Artwork Created on the International Space Station

02/28/2017 by Engineering360 eNewsletter
The first-ever off-world artwork by Eyal Gever demonstrates what humanity can achieve through positivity, and lightens the mood with laughter in space...
Views: 133, Comments: 0
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Animal Science

238 blog entries, 2171 comments (0 Viewing)

Dogs on the Brain

03/13/2017 by MaggieMc
My good friend just adopted a puppy, and with all the pictures coming my way, I have dogs on the brain. Evidently, so do researchers. Two studies were...
Views: 555, Comments: 11
Last comment 03/16/2017 by James Stewart

Kid’s Best Friend

02/01/2017 by MaggieMc
Last week, “A Dog’s Purpose” was released in theaters. The movie—which “shares the soulful and surprising story of one d...
Views: 299, Comments: 15
Last comment 02/05/2017 by JPool
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The CR4 Admin Blog

101 blog entries, 1494 comments (0 Viewing)

2016 Year in Review & Farewell

03/07/2017 by SavvyExacta
It’s a little late for a 2016 year in review but I thought it was a fitting subject for my final CR4 post. You see, I’m moving on to a new...
Views: 524, Comments: 16
Last comment 03/09/2017 by jdretired

Across Five Years (A CR4 Clip Show)

12/28/2016 by HUSH
It certainly doesn’t happen as much today, in the age of streaming services and binge watching. But up until recently the ‘clip show’...
Views: 270, Comments: 3
Last comment 12/30/2016 by Andrew Westman
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What Is It?

69 blog entries, 1869 comments (0 Viewing)

What is It? for February 2

Do you know what this is? Share your guess! Submitted by CR4 user phph001.
Views: 602, Comments: 9
Last comment 02/07/2017 by ronc
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Rockaholic Adventures

50 blog entries, 611 comments (0 Viewing)

Morphology of Olympus Mons

12/05/2016 by Shawn
After discussing the morphology of Olympus Mons I felt compelled to share my intuition of the shield volcanos existence and morphology strictly throug...
Views: 326, Comments: 5
Last comment 12/08/2016 by Shawn
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Great Engineers & Scientists

145 blog entries, 501 comments (0 Viewing)

The First Lady of Structural Engineering

11/28/2016 by MaggieMc
Elmina Wilson is widely regarded as “the first lady of structural engineering.” Born on September 29, 1870, Elmina came from a family of w...
Views: 529, Comments: 2
Last comment 07/11/2017 by esperanzajpalmer
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65 blog entries, 579 comments (0 Viewing)

The San Fran Skyscraper with a Six-Inch Slant

09/28/2016 by HUSH
Skyscrapers are a lot more to a city than just real estate. They represent financial prosperity and engineering acumen. They transform the identity of...
Views: 985, Comments: 20
Last comment 01/25/2017 by MR. Guest
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Other Blog Entries of Interest

Caption This for 3/31/2017

03/31/2017 posted in Caption This!
by lmno24
This week's image: Thanks to Nigh for the submission! Keep in mind we are always looking for submissions, send us photos anytime. Be sure to vote...
Views: 603, Comments: 38
Last comment 04/07/2017 by Randall

Caption This for 3/24/2017

03/24/2017 posted in Caption This!
by MaggieMc
This weeks image: Be sure to vote for your favorite caption! Thanks to Nigh for the submission, we're always looking for more!
Views: 749, Comments: 85
Last comment 04/06/2017 by szwasta

Caption This for 3/17/2017

03/17/2017 posted in Caption This!
by lmno24
This weeks image: Be sure to vote for your favorite caption! Thanks to user sptilton for the submission.
Views: 458, Comments: 20
Last comment 03/20/2017 by Mikerho

Caption This for 3/10/2017

03/10/2017 posted in Caption This!
by MaggieMc
This week's image: Be sure to vote for your favorite caption! Thanks to Solar Eagle for the submission.
Views: 584, Comments: 49
Last comment 03/14/2017 by Mikerho

Caption This for 3/3/2017

03/03/2017 posted in Caption This!
by lmno24
This week's image: Be sure to vote for your favorite caption! Thanks to user Nigh for the submission.
Views: 684, Comments: 52
Last comment 03/10/2017 by MaggieMc