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General Discussion

15011 threads, 278291 comments (13 Viewing)

02/26/2017 by pucatoso
Views: 3, Comments: 0

Erector Sets

02/25/2017 by phph001
I have an interest in building large Meccano models, and am interested in extending to Erector sets, about which I unfortunately know very little.. At...
Views: 109, Comments: 16
Last comment 02/26/2017 by phph001

Floating Slab or Footings Below Frost Line

02/24/2017 by phoenix911
I have a question. First a little background. My girlfriend wants me to build her a small 8’x10’ garden shed. We were looking into it the...
Views: 168, Comments: 18
Last comment 02/25/2017 by phoenix911
Views: 170, Comments: 2
Last comment 02/23/2017 by Andrew Westman
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Commercial Space

1970 threads, 3740 comments (22 Viewing)

Soft seal gate valve-Z45X, RVHX soft seal gate valve

02/17/2017 by codi-valves
Product Name: Soft seal gate valve Model: Z45X, RVHX Product caliber: DN50 ~ DN600 Product pressure: PN10 ~ PN25 Product material: cast iron, cast s...
Views: 46, Comments: 1
Last comment 02/17/2017 by Tornado

Application of Large Diameter Ventilation Butterfly Valve in Industrial Valve

02/17/2017 by codi-valves
Advanced ceramic materials, as new materials in the twenty-first century, have been valued by more and more scientific workers and have been applied...
Views: 42, Comments: 0

Engineering & Welding Software - ProWrite

02/17/2017 by TDJohnson
Are you in charge of organizing and maintaining your welding documentation? Quickly create a single (S9 or D1.1) and multi-process (S9) PQR, WPS, or W...
Views: 45, Comments: 0

Engineering & Welding Software - DesignCalcs

02/17/2017 by TDJohnson
Are you designing pressure vessels? Quickly create pressure vessels with common components such as shells, heads, nozzles and flanges with DesignCalcs...
Views: 47, Comments: 0
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CR4 Feedback

684 threads, 11980 comments (0 Viewing)

Question to CR4

02/22/2017 by Anonymous Poster
Dear CR4 team, I wanted to attach a Word file that is on my computer, but it was not accepted. How is a docu attached to a message? Thank you
Views: 142, Comments: 6
Last comment 02/22/2017 by Floram
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See all Blog Entries

Section Blogs

WoW Blog (Woman of the Week)

174 blog entries, 513 comments (0 Viewing)

Woman of the Week - Maria Gaetana Agnesi

02/20/2017 by lmno24
Woman of the Week - Maria Gaetana Agnesi Maria Gaetana Agnesi was an Italian mathematician, philosopher, theologian, and humanitarian in the 1700s....
Views: 238, Comments: 1
Last comment 02/22/2017 by Jules808

Woman of the Week – Joy Adamson

02/13/2017 by lmno24
While she’s not a scientist or engineer, her conservation work over the course of her life is something we can all appreciate. Joy Adamson is be...
Views: 118, Comments: 1
Last comment 02/15/2017 by SavvyExacta
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The Engineer's Notebook

391 blog entries, 6261 comments (6 Viewing)

Nice to Meet You!

02/25/2017 by M-ReeD
Imagine your 14-year-old self. Do you have anything in common with that person today (assuming you are no longer 14)? Probably not much in terms of pe...
Views: 78, Comments: 6
Last comment 02/26/2017 by Hooker

Brains and Birth Order

02/18/2017 by M-ReeD
This is less of a blog post and more of a memo to my younger siblings. I was right all along. I am smarter than you. Oldest siblings everywhere are w...
Views: 258, Comments: 16
Last comment 02/24/2017 by Kris
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"On This Day" In Engineering History

241 blog entries, 840 comments (0 Viewing)

February 17, 1864—The Hunley Sinks the Housatonic

02/17/2017 by Jonathan Fuller
On this day in 1864, the pioneering Confederate submarine H.L. Hunley rammed and sank the USS Housatonic during the US Civil War. She was the first co...
Views: 268, Comments: 2
Last comment 02/18/2017 by ronc

January 25, 1947 — The First Electronic Game is Patented

01/25/2017 by MaggieMc
Nowadays, many of us Millennials take our video and computer games for granted—they’re easily downloaded onto our smartphones, and there&r...
Views: 365, Comments: 6
Last comment 01/26/2017 by MaggieMc
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Caption This!

401 blog entries, 16896 comments (0 Viewing)

Caption This for 2/24/17

02/23/2017 by LakeGrl
This week's image: Be sure to vote for your favorite caption!
Views: 375, Comments: 38
Last comment 02/25/2017 by phoenix911

Caption This for 2/17/17

02/16/2017 by LakeGrl
This week's image: Be sure to vote for your favorite caption!
Views: 433, Comments: 45
Last comment 02/24/2017 by Charlie Greenwood
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Notes & Lines

39 blog entries, 326 comments (0 Viewing)

Engineers Are Building DIY Pipe Organs, And They're Fabulous

02/06/2017 by Jonathan Fuller
About a year and a half ago I started working as a professional organist on the weekends. In the course of that work I’ve met people who work a...
Views: 422, Comments: 17
Last comment 02/10/2017 by Jonathan Fuller

Is Digital Music Making You Sad?

12/15/2016 by Jonathan Fuller
John Philip Sousa—composer of the well-known “Stars and Stripes Forever” march and namesake of the sousaphone—famously hated r...
Views: 398, Comments: 28
Last comment 01/05/2017 by adreasler
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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: 359, Comments: 9
Last comment 02/07/2017 by ronc
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Animal Science

237 blog entries, 2160 comments (0 Viewing)

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: 190, Comments: 15
Last comment 02/05/2017 by JPool

Concrete and Limpets Aren’t So Different After All

01/27/2017 by MaggieMc
Since Patella vulgata, the common limpet, are living, breathing organisms, one would expect them to have almost nothing in common with concrete; howev...
Views: 142, Comments: 3
Last comment 01/30/2017 by SavvyExacta
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Challenge Questions

348 blog entries, 28381 comments (0 Viewing)

Tropical Sun: Newsletter Challenge (February 2017)

This month's Challenge Question: Specs & Techs from IEEE Engineering360: The Tropics of Cancer and Capricorn are circles of latitude correspondin...
Views: 1085, Comments: 6
Last comment 02/03/2017 by James Stewart

Perplexing Propagation: Newsletter Challenge (January 2017)

This month's Challenge Question: Specs & Techs from IEEE GlobalSpec: Short-wave and AM transmitters are required to lower their transmission powe...
Views: 1679, Comments: 47
Last comment 01/24/2017 by WilhelmHKoen
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Abe's Blog

5 blog entries, 69 comments (0 Viewing)

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: 280, Comments: 35
Last comment 11/19/2016 by TimONeill

Hypatia of Alexandria – Part 2

11/08/2016 by amichelen
(This is the second part of Hypatia of Alexandria) The ideas developed by the Pythagoreans represent a solid contribution to the scientific knowledge...
Views: 182, Comments: 1
Last comment 11/10/2016 by Bayes
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Defense & Security Technology

111 blog entries, 1644 comments (1 Viewing)

PoE Controller IC Delivers Power Plus Sequencing and Protection

02/26/2017 by Engineering360 eNewsletter
Power over Ethernet (PoE) seems like a great and obvious idea, but it has some complications. One integrated circuit (IC), the LTC4279, aims to help m...
Views: 7, Comments: 0

50 Years of CES and Technological Advancement

01/12/2017 by Engineering360 eNewsletter
This year's CES, which begins on January 5, 2017, marks the 50th anniversary of the tradeshow. As a result, the event will focus on the significant co...
Views: 87, Comments: 0
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The CR4 Admin Blog

100 blog entries, 1472 comments (0 Viewing)

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: 180, Comments: 3
Last comment 12/30/2016 by Andrew Westman

New: CR4 Commenting on Engineering360 & Electronics360

11/30/2016 by SavvyExacta
Starting December 1, 2016, CR4 users will be able to comment on articles from both Engineering360 and Electronics360 with their CR4 accounts! A piece...
Views: 126, Comments: 4
Last comment 12/01/2016 by SavvyExacta
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Editor's Desk

93 blog entries, 362 comments (0 Viewing)

John Glenn Dies at Age 95

12/08/2016 by wagman262
What thoughts do you have on the passing of John Glenn? Not an engineer, but certainly an iconic figure who rode into space on the accomplishments of...
Views: 199, Comments: 13
Last comment 12/10/2016 by Casper71

Impact of an EPA Rule Rollback

12/08/2016 by wagman262
Curious for your back-of-the-envelope assessment: Let’s say EPA stops enforcing air and water rules for power plants. Would doing so ease regula...
Views: 185, Comments: 24
Last comment 12/13/2016 by tcmtech
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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: 156, Comments: 5
Last comment 12/08/2016 by Shawn

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...
Views: 507, Comments: 14
Last comment 12/13/2016 by MR. Guest
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Great Engineers & Scientists

145 blog entries, 500 comments (2 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: 208, Comments: 1
Last comment 11/30/2016 by gideon
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40 blog entries, 315 comments (0 Viewing)

Can Brain and Spine Implants Help Overcome Paralysis?

11/15/2016 by Bayes
Let me start with a word of caution regarding this article. The work done is very preliminary, for a very specific type of spinal injury, and far from...
Views: 158, Comments: 1
Last comment 11/15/2016 by SolarEagle

Impossible EM Drive Works - NASA

11/08/2016 by Bayes
For years now, the EM Drive, a propellantless thruster that physicists insist should be impossible, has produced measurable force in test after test....
Views: 576, Comments: 15
Last comment 11/14/2016 by Thomas Wiklanski
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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: 737, Comments: 20
Last comment 01/25/2017 by MR. Guest

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...
Views: 756, Comments: 12
Last comment 03/31/2016 by SolarEagle
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TechnoTourist’s Engineering Expeditions

83 blog entries, 490 comments (0 Viewing)

A Piece of Ireland in Texas

08/23/2016 by joeymac
Everyone knows that kissing the Blarney Stone over in Ireland is supposed to give a person the gift of gab and eloquence of speech. I was fortunate en...
Views: 393, Comments: 7
Last comment 08/25/2016 by joeymac

Amsterdam's Canals

07/13/2016 by joeymac
When I went on my European trip another stop I made was to Amsterdam, and I was fascinated by all of the canals and bridges connecting to everything....
Views: 233, Comments: 0
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Relativity and Cosmology

147 blog entries, 3998 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...
Views: 810, Comments: 28
Last comment 01/28/2017 by Erik Nelson

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...
Views: 1780, Comments: 130
Last comment 08/18/2016 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...
Views: 220, Comments: 0
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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: 432, Comments: 3
Last comment 03/22/2016 by Bayes
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Other Blog Entries of Interest

MkII Archer Automaton

12/28/2016 posted in Workbench Creations
by Del the cat
Over the last few weeks I've rebult the Archer automaton with several improvements. Although there are only two basic movements driven by cams the int...
Views: 178, Comments: 19
Last comment 01/07/2017 by Andy Germany

Archer Automaton

12/07/2016 posted in Workbench Creations
by Del the cat
For ages I've been tinkering with the idea of making an archer automaton. There are some superb Japanese ones, but while they are incredible pieces of...
Views: 474, Comments: 24
Last comment 02/01/2017 by English Rose

What is Really Missing From Soylent?

11/14/2016 posted in Food & Beverage Technology
by Tourmaline
What is really missing from Soylent? The idea of a meal replacement bar, shake, or pill is a delightful one. Imagine not having to worry about cookin...
Views: 229, Comments: 10
Last comment 12/18/2016 by Andrew Westman

Next Book- Three Moments of an Explosion

11/04/2016 posted in The CR4 Book Club
by Bayes
For any CR4 members that are interested, the CR4 Book Club will next be reading and discussing Three Moments of an Explosion by China Mieville. Her...
Views: 269, Comments: 0

Book Club Discussion: Dark Matter by Blake Crouch

10/31/2016 posted in The CR4 Book Club
by Bayes
CR4 Book Club Discussion: - Dark Matter - by Blake Crouch (2016) A group of us at IEEE GlobaSpec read Dark Matter by Blake Crouch. We discussed th...
Views: 287, Comments: 22
Last comment 11/06/2016 by Rixter