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NYTimes Connections - n4ku - Jul 20, 2024 - 11:04am
 
NY Times Strands - ptooey - Jul 20, 2024 - 10:58am
 
Things You Thought Today - steeler - Jul 20, 2024 - 10:56am
 
Wordle - daily game - ptooey - Jul 20, 2024 - 10:55am
 
RightWingNutZ - rgio - Jul 20, 2024 - 10:39am
 
Radio Paradise Comments - islander - Jul 20, 2024 - 9:23am
 
July 2024 Photo Theme - Summer - thisbody - Jul 20, 2024 - 9:17am
 
Trump - islander - Jul 20, 2024 - 8:46am
 
Project 2025 - Red_Dragon - Jul 20, 2024 - 8:44am
 
Today in History - DaveInSaoMiguel - Jul 20, 2024 - 7:32am
 
Gardeners Photos - Isabeau - Jul 20, 2024 - 7:04am
 
COVID-19 - Isabeau - Jul 20, 2024 - 6:40am
 
Climate Change - Isabeau - Jul 20, 2024 - 6:39am
 
Gotta Get Your Drink On - Steely_D - Jul 19, 2024 - 8:42pm
 
Joe Biden - Steely_D - Jul 19, 2024 - 8:40pm
 
The Human Condition - oldviolin - Jul 19, 2024 - 7:43pm
 
favorite love songs - oldviolin - Jul 19, 2024 - 7:38pm
 
2024 Elections! - Steely_D - Jul 19, 2024 - 6:40pm
 
The Republican Convention - Red_Dragon - Jul 19, 2024 - 6:37pm
 
Name My Band - haresfur - Jul 19, 2024 - 5:41pm
 
What makes you smile? - Steely_D - Jul 19, 2024 - 5:02pm
 
Positive Thoughts and Prayer Requests - oldviolin - Jul 19, 2024 - 4:50pm
 
• • • The Once-a-Day • • •  - oldviolin - Jul 19, 2024 - 4:45pm
 
Russia - R_P - Jul 19, 2024 - 2:49pm
 
The Obituary Page - GeneP59 - Jul 19, 2024 - 12:00pm
 
Bug Reports & Feature Requests - RPnate1 - Jul 19, 2024 - 11:34am
 
Israel - R_P - Jul 19, 2024 - 9:49am
 
Song of the Day - buddy - Jul 19, 2024 - 9:29am
 
Solar / Wind / Geothermal / Efficiency Energy - sunybuny - Jul 19, 2024 - 7:02am
 
Vinyl Only Spin List - hialtidude - Jul 19, 2024 - 6:58am
 
Republican Party - thisbody - Jul 18, 2024 - 11:03pm
 
Europe - thisbody - Jul 18, 2024 - 10:59pm
 
260,000 Posts in one thread? - oldviolin - Jul 18, 2024 - 8:43pm
 
Poetry Forum - oldviolin - Jul 18, 2024 - 8:40pm
 
Living in America - black321 - Jul 18, 2024 - 8:14pm
 
USA! USA! USA! - R_P - Jul 18, 2024 - 11:13am
 
Lyrics that are stuck in your head today... - oldviolin - Jul 18, 2024 - 10:28am
 
Jon Stewart interview - Steely_D - Jul 18, 2024 - 7:36am
 
kurtster's quiet vinyl - kurtster - Jul 17, 2024 - 7:45pm
 
What the hell OV? - oldviolin - Jul 17, 2024 - 2:04pm
 
Mixtape Culture Club - Steely_D - Jul 17, 2024 - 7:51am
 
Best Song Comments. - q4Fry - Jul 17, 2024 - 7:32am
 
Rhetorical questions - sunybuny - Jul 17, 2024 - 7:29am
 
Musky Mythology - Red_Dragon - Jul 17, 2024 - 5:47am
 
What questions would you like to answer for the world? - oldviolin - Jul 16, 2024 - 5:43pm
 
Democratic Party - Red_Dragon - Jul 16, 2024 - 4:48pm
 
Race in America - Red_Dragon - Jul 16, 2024 - 3:53pm
 
Live Music - skyguy - Jul 16, 2024 - 3:44pm
 
Guns - Red_Dragon - Jul 16, 2024 - 3:43pm
 
New Music - thisbody - Jul 16, 2024 - 2:26pm
 
Gimmie 5 Kurt! - thisbody - Jul 16, 2024 - 12:30pm
 
China - thisbody - Jul 16, 2024 - 12:05pm
 
Acoustic Guitar - thisbody - Jul 16, 2024 - 11:08am
 
Bear! - Beaker - Jul 16, 2024 - 6:43am
 
Favorite Quotes - Isabeau - Jul 15, 2024 - 3:43pm
 
Words that should be put on the substitutes bench for a year - Isabeau - Jul 15, 2024 - 12:25pm
 
The Truth About (Modern) Popular Music - Proclivities - Jul 15, 2024 - 8:18am
 
Please don't ban me, but: Taylor Swift... - sunybuny - Jul 15, 2024 - 4:55am
 
YouTube: Music-Videos - Beaker - Jul 14, 2024 - 3:51pm
 
Pernicious Pious Proclivities Particularized Prodigiously - R_P - Jul 14, 2024 - 12:52pm
 
Media Bias - Beaker - Jul 14, 2024 - 9:46am
 
what the hell, miamizsun? - oldviolin - Jul 14, 2024 - 7:51am
 
AH! There's an elephant in the room! - Red_Dragon - Jul 13, 2024 - 3:42pm
 
Outstanding Covers - DaveInSaoMiguel - Jul 13, 2024 - 12:49pm
 
Evolution! - R_P - Jul 13, 2024 - 10:34am
 
Eclectic Sound-Drops - oldviolin - Jul 13, 2024 - 10:23am
 
RP on Mac Just Stopped Working - tourtelot - Jul 12, 2024 - 9:35pm
 
Are they married yet? YES THEY ARE! - Manbird - Jul 12, 2024 - 2:51pm
 
Tech & Science - Manbird - Jul 12, 2024 - 2:46pm
 
Classic TV Curiosities - Proclivities - Jul 12, 2024 - 12:50pm
 
Ukraine - R_P - Jul 12, 2024 - 10:48am
 
Florida - miamizsun - Jul 12, 2024 - 7:05am
 
Regarding Birds - Jiggz - Jul 12, 2024 - 1:41am
 
Strange signs, marquees, billboards, etc. - thisbody - Jul 11, 2024 - 10:36pm
 
Photography Forum - Your Own Photos - KurtfromLaQuinta - Jul 11, 2024 - 2:05pm
 
Index » Internet/Computer » The Web » Tech & Science Page: 1, 2, 3 ... 194, 195, 196  Next
Post to this Topic
Manbird

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Location: La Villa Toscana
Gender: Male


Posted: Jul 12, 2024 - 2:46pm

 R_P wrote:
Most accurate clock in history made by ‘quieting’ atoms
Strontium-based timepiece gains or loses only one second every 40 billion years.


prove it
R_P

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Gender: Male


Posted: Jul 12, 2024 - 2:40pm

Most accurate clock in history made by ‘quieting’ atoms
Strontium-based timepiece gains or loses only one second every 40 billion years.

Strontium Lattice Is Now the World's Most Accurate Clock
thisbody

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Location: all-pervading
Gender: Male


Posted: Nov 23, 2023 - 9:08am

Bright Satellites Are Disrupting Astronomy
Summary: Astronomers spent a lot of time asking SpaceX and other large satellite operators to pretty please make their satellites fainter and/or use fewer satellites. And then BlueWalker 3 was launched by some tiny company and is one of the brightest things in the sky. Asking nicely isn't working: international regulation and pollution penalties are needed.

From the author:
...
This article required weeks of back-and-forth with the editor, the editor-in-chief, and Nature's lawyers, so I hope that means it's a good one.
During this process, I learned that satellite companies are so powerful and litigious that even giant publishers like Nature are terrified of getting sued. Which is...rather worrying.

Lazy8

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Location: The Gallatin Valley of Montana
Gender: Male


Posted: Jul 29, 2023 - 9:19am

 Red_Dragon wrote:
I bet they use portable water filtration systems too, and shovels and shoes! When will this technological madness end?

When we look back on the media's breathless criticism of Elon Musk this article this article may prove to be peak hysteria.

miamizsun

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Location: (3283.1 Miles SE of RP)
Gender: Male


Posted: Jul 29, 2023 - 7:21am

i've seen a bit of buzz about the "super conductivity" breakthrough
just check your science news feed
obviously i'm super skeptical
but in this case i would love to be wrong

NoEnzLefttoSplit

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Gender: Male


Posted: Jul 28, 2023 - 11:41pm

Toyota announces new battery tech
  and because I was intrigued about the implications for aviation.. here is a great paper summarizing current technologies. 
best bit:

"By comparison, state-of-the-art Li-ion batteries with an energy density of approximately 250 Wh/kg are 48 times less than jet fuels, which possess a staggering energy density of 12,000 Wh/kg <26>. However, according to Åhman <47> and, Haung and Zhang <48>, the fuel-to-wheel efficiency of an internal combustion engine averages ∼28%, while electric motors are ∼90% efficient. This reduces the ratio of batteries to aviation fuels from 1:48 to 1:15. Considering an average improvement of 600 Wh/kg battery energy density, the ratio is further reduced to 1:6.2. In addition, it has been proven through research that efficient aerodynamic designs such as distributed propulsion and boundary layer injection which are much more practical with electric aviation can reduce the overall energy consumption during flight by a factor of 3 to 5 <49>. Using the mean value of 4 reduces the ratio of batteries to aviation fuel to 1:1.5. In summary, the development approaches towards electric propulsion can be described as a three-point approach predicated on: 1. battery chemistries of minimum 600 Wh/kg, 2. advancement in electric motor design for high power applications, and 3. efficient aerodynamic design."

There is obviously a lot of blind optimism behind those figures. For instance jet turbines display 50% fuel efficiency, not the 28% cited here, but the trend is looking better than it did a couple of years ago. The new Toyota battery is expected to have an energy density of 450 Wh/kg, which is still some way off the minimum 600 Wh/kg stated above, so the more realistic alternative for zero-carbon aviation will probably remain synthetic bio-fuels for some time to come.






oldviolin

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Location: esse quam videri
Gender: Male


Posted: May 7, 2023 - 11:46am

 DaveInSaoMiguel wrote:
 
Finally a solution for my infrequent magneto-reluctance! I was afraid I'd never get a sparkle...{#Wink}
DaveInSaoMiguel

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Location: No longer in a hovel in effluent Damnville, VA
Gender: Male


Posted: May 7, 2023 - 9:32am


Red_Dragon

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Location: Dumbf*ckistan


Posted: Mar 15, 2023 - 8:01pm

Musk brought internet to Brazil’s Amazon. Criminals love it.
Red_Dragon

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Location: Dumbf*ckistan


Posted: Oct 24, 2022 - 3:09pm

Aluminium alloy could boost spacecraft radiation shielding 100-fold
Red_Dragon

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Location: Dumbf*ckistan


Posted: Aug 29, 2022 - 5:53pm

 R_P wrote:



awesome
R_P

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Posted: Aug 29, 2022 - 5:25pm


R_P

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Gender: Male


Posted: Aug 24, 2022 - 9:39pm


Red_Dragon

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Location: Dumbf*ckistan


Posted: Aug 6, 2022 - 3:17pm

Why the Rotary Engine Is Perfect for Hydrogen Fuel
Red_Dragon

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Location: Dumbf*ckistan


Posted: Jul 23, 2022 - 1:13pm

Google fires software engineer who claimed its AI chatbot is sentient
GeneP59

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Location: On the edge of tomorrow looking back at yesterday.
Gender: Male


Posted: Jul 2, 2022 - 1:29pm

 Steely_D wrote:






Steely_D

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Location: Biscayne Bay
Gender: Male


Posted: Jul 2, 2022 - 6:26am

 haresfur wrote:




haresfur

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Location: The Golden Triangle
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Posted: Jul 1, 2022 - 8:30pm


miamizsun

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Location: (3283.1 Miles SE of RP)
Gender: Male


Posted: Jun 26, 2022 - 8:29am

such an inspiring video regarding science, especially biology/biotech

neurosurgeon turned researcher to develop tools and treatments


miamizsun

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Location: (3283.1 Miles SE of RP)
Gender: Male


Posted: Jun 23, 2022 - 5:38pm


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