EchoSTEM

Sunday, June 6, 2021

Project Hail Mary by Andy Weir

'Project Hail Mary' by Andy Weir, published in May 2021, is a must read if you liked 'The Martian.' This book is quickly becoming one of my favorite scifi books of all time. More epic than the Martian; more engineering and more science than what you have read in his first book.

Physics, chemistry, microbiology, mechanical engineering, computer science, scientific inquiry and experimentation, teamwork and humanity at its best. 

You will try to read this book as fast as possible; you will be engrossed in Ryland Grace's adventure. By the way, I think Weir did science the shit out of this one.


Related Links:

  • The Martian
  • Artemis

Posted by Cem at 9:25 PM No comments:
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Wednesday, October 21, 2020

Osirix-Rex Asteroid Sample Return Mission

OSIRIS-REx tags Bennu! Watch the moment of impact:

 

[from https://www.asteroidmission.org/]

What's up with that name, you ask? Here is an explanation:


Links:

  • Mission objectives

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Labels: asteroids, space exploration

Sunday, May 5, 2019

Drake Equation: A visualization

A very nice visualization and interactive calculator for Drake Equation is at https://informationisbeautiful.net/visualizations/the-drake-equation/ 
 
https://informationisbeautiful.net/visualizations/the-drake-equation/

Make sure you select 'lowest possible' and look at the final number ;)
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Labels: aliens, galaxy, math, space

Monday, November 19, 2018

A new branch? A new branch of tree of life?! (aka Hemimastigophora is a novel supra-kingdom-level lineage)

This is a good story.. Or, a news event? This is a good science news.

So, there is this young student, Yana Eglit, a Ph.D. student at Simpson Lab, Dalhousie University, in Hallifax, Canada. She goes on a picnic/hike with friends, and picks up some random dirt samples:

"The hemimastigotes [...] were found by Eglit during a spring hike with some other students along the Bluff Wilderness Trail outside Halifax a couple of years ago. She often has empty sample vials in her pockets or bags, and scooped a few tablespoons of dirt into one of them from the side of the trail."

This is the best part of the story, maybe besides their final observations; Ms. Eglit takes empty sample vials with her when she goes hiking!

She then "back at the lab,  soaked the soil in water, which often revives microbes that have gone dormant, waiting for the next big rainstorm. Over the next few weeks, she checked on the dish through a microscope to see what might be swimming around." This was few years later, and is the second best part of the story, besides the fact that they have discovered a new branch of life; she pulled the samples years later to take a look.

When she observed some strange behavior. "It's as if these cells never really learned that they have many flagella," Eglit said with a laugh. She had seen something with that strange motion once before, a few years ago, and recognized it as a rare hemimastigote." This is the third best thing about this story; she was building on previous scientific research/knowledge.

Then, "realizing that she had something very rare and special, Eglit flagged another graduate student Gordon Lax, who specializes in genetic analyses of individual microbes — a new and tricky technique — to see where they fit in the evolutionary tree. The pair dropped everything to analyze the new microbe." And, the fourth best thing about this news; she quickly find another researcher to help her and they collaborated. This is the advantage of having a scientific laboratory (and scientific community) where scientists can work together.

And, then they realized that they have identified a new species that do not belong to known branches of the tree of life. The final manuscript involves 6 researchers and three different labs.

Science (and scientific methods) works!

Read the details here. And, make sure you listen to the audio at the end of the article where Biology professor Alastair Simpson and Mainstreet host Bob Murphy discuss this news in detail.

Related articles:
  • Globe and mail
  • Gizmodo

Related Links:
  • Simpson Lab
  • Manuscript at Nature: Hemimastigophora is a novel supra-kingdom-level lineage of eukaryotes, Gordon Lax, Yana Eglit, Laura Eme, Erin M. Bertrand, Andrew J. Roger & Alastair G. B. Simpson 


Posted by Cem at 8:30 AM No comments:
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Labels: biology, Dalhousie University, hemimastigote, microbes, science, tree of life

Sunday, November 18, 2018

Old kilogram, meet new kilogram

Kilogram (kg), the base unit of mass in SI (system international; international system of units) is defined with a platinum alloy cylinder, located near Paris. The cylinder was manufactured in 1889.
After 130 years, on May 20th, 2019, the reference definition of kilogram will no longer be this physical artifact, but a physical constant.

Planck constant, defined exactly as:

6.62607015×10−34 kg⋅m2⋅s−1 

can define the kilogram in terms of second and meter [Wikipedia], assuming we can determine Planck constant by a stable measurement. Meter is (now) defined as a time fraction of speed of light in vacuum. Therefore, kilogram can now be defined in terms of time only.

Here are the devices for the old and new definition of the kg:

 (J.L.Lee/NIST)

  (J.L.Lee/NIST)

Related articles:
  • Kilogram Redefined (Wired)
Related Links:
  • Kilogram (Wikipedia)
  • Planck constant (W)
  • Meter (W)
  • International System of Units (W)
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Labels: kilogram, planck constant, SI units

Wednesday, October 10, 2018

Exoplanets... to date

Don't forget to visit this page on Wikipedia for the list of exoplanets discovered so far once in a while. The list is increasing.


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Labels: astronomy, exoplanets, wikipedia

Tuesday, October 9, 2018

New species: "Coywolf"

RawStory reported, in 2015, that there is a new species combining wolves, coyotes and dogs is evolving as you read this article.

Related:
  • Greater than the sum of its parts, Economist, Oct 31, 2015.
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Labels: biology, coyote, eastern US, evolution, wolf

Monday, October 8, 2018

IPCC Special Report on the Impacts of Global Warming of 1.5 °C above Pre-industrial Levels

The web page for the 'IPCC special report on the impacts of global warming of 1.5 °C above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty' is here.

On this page, you will find many links such as:
  • Press release
  • FAQs
  • Summary for policy makers, etc.
Short version is this:
 


Basically, even if we make drastic changes, we'll still be over 1.5 degrees in the near future. We need to stop questioning these findings and start working harder.

Posted by Cem at 2:31 PM No comments:
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Labels: climate change, global warming, policy

Wednesday, July 25, 2018

(Subglacial liquid) water on Mars!

It has been long suspected that there is water on Mars. Now, there is evidence of a well-defined, 20-kilometer-wide zone under southern polar ice cap.

There are a lot of news articles about this, but here is the original manuscript from 'Science':

Radar evidence of subglacial liquid water on Mars, by R. Orosei et al.
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Labels: astrobiology, life, mars, solar system, space, water

Friday, April 20, 2018

Interactive Periodic Table of Elements

Found this

 
 on Science Alert.

Original at http://elements.wlonk.com/ElementsTable.htm. Seriously, you have to spent at least a few minutes on this page, you won't be disappointed: Yes, your smoke detector contains Americium, a radioactive metal.
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Labels: chemistry, periodic table

Thursday, April 19, 2018

Robotic manipulation demo(s)

Very nerdy, fun to watch... Makes you appreciate the speed of robotic manipulators.

 
 From Laughing Squid. 

They can go much faster by the way... For example:
  • https://www.youtube.com/watch?v=0-Kpv-ZOcKY
  • https://www.youtube.com/watch?v=v9oeOYMRvuQ

Also:
  • from Tesla: https://www.youtube.com/watch?v=8_lfxPI5ObM
And, robot playing table tennis:
  • https://www.youtube.com/watch?v=tIIJME8-au8

Posted by Cem at 6:30 AM No comments:
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Labels: food processing, manipulators, robotics, table tennis, tesla

Thursday, September 7, 2017

42! [Just a map of the universe]


Not coming to your car GPS anytime soon, but still a nice map. The 'map' of our universe is getting a little bit more detailed.

The dot on the picture is our galaxy, potentially marked as 'mostly harmless.'

https://futurism.com/videos/detailed-map-date-place-universe/


Related:
  • Laniakea Supercluster
  • Video by Daniel Pomarede
  • Hitchhikers Guide to the Galaxy
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Labels: astronomy, galaxy, milky way, supercluster, universe

Wednesday, September 6, 2017

What is Code?

This (long) article from Bloomberg Business week is a bit old, but still pretty good introduction for newbies, non-technical persons, and many others.

Make sure you hit the 'E-Mail Address Validation Meeting' section.

https://www.bloomberg.com/graphics/2015-paul-ford-what-is-code/

https://www.bloomberg.com/graphics/2015-paul-ford-what-is-code/
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Labels: algorithms, coding, java, python, sprint

Monday, July 31, 2017

Trust No One! Unless...

An interactive animation (?) from Nicky Case:

Nicky Case's Trust

Related:
  • Game theory
Posted by Cem at 11:19 AM No comments:
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Labels: game theory, trust

Monday, May 15, 2017

Pure magic: Direct counterfactual communication via quantum Zeno effect

Not really, it's just science (or physics)...

PNAS (Proceedings of the National Academy of Sciences of the United States of America) published a manuscript titled "Direct counterfactual communication via quantum Zeno effect" by Cao et al.

The article's significance, submitted in August 2016, is given as:

"Recent theoretical studies have shown that quantum mechanics allows counterfactual communication, even without actual transmission of physical particles, which raised a heated debate on its interpretation. Although several papers have been published on the theoretical aspects of the subject, a faithful experimental demonstration is missing. Here, by using the quantum Zeno effect and a single-photon source, direct communication without carrier particle transmission is implemented successfully. We experimentally demonstrate the feasibility of direct counterfactual communication with the current technique. The results of our work can help deepen the understanding of quantum mechanics. Furthermore, our experimental scheme is applicable to other quantum technologies, such as imaging and state preparation."


(Credit: Cao et al)

How help you grok the article, here are some links:
  • Article from Science Alert
  • Wikipedia: Quantum Zeno Effect 
  • Wikipedia: Zeno's Arrow Paradow
  • ResearchGate: Yuan Cao
Be warned, these will take a while to read (and believe) if you are not a physicist.



Posted by Cem at 11:55 AM No comments:
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Labels: counterfactual communication, magic, paradox, physics, quantum mechanics, zeno

Tuesday, May 2, 2017

Speck of dust... Mostly harmless...

Space.com posted a few new images from Cassini probe that highlight our relative size/position/importance in the universe.

Note that these pictures are taken inside the solar system, basically close ups. Have you seen the moon, next to the earth?

Credit: NASA/JPL-Caltech/Space Science Institute

Visit the first two links below for more eye-pooping images.

Related:
  • http://www.space.com/36562-earth-moon-through-saturn-rings-cassini.html
  • Cassini: The Grand Finale, mission ends in September 2017
  • Mostly harmless
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Labels: cassini, nasa, saturn, space, space exploration

Friday, March 17, 2017

NASA's Education Program in Latest US Budget Proposal

The Verge lists current budget cuts to NASA in a new article.  The following paragraph is giving me a heartburn:

"[NASA's education program] is the area that’s hit hardest by Trump’s budget request. In fact, NASA education, which received $115 million for fiscal year 2016, would be completely eliminated for fiscal year 2018."

This is not the final budget, just a request. Let's see what the congress will do with these requests to cut multiple NASA programs.

Read the details at Verge.


Related:
  • 2016 Federal Budget: Where the Money Really Goes [from Motley Fool]
Posted by Cem at 3:20 PM No comments:
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Labels: federal budget, nasa, science

Another self-driving car video

Tesla web site now has a (yet another) video of a self-driving Model S. It is really fun to watch. Don't forget to keep an eye on the side frames, the magic displayed on those frames:

Posted by Cem at 1:36 PM No comments:
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Labels: self-driving cars, tesla

Wednesday, February 22, 2017

2MASS J23062928-0502285, yeah!

Not one, not two, but seven potential planets around a single small star!
Here is a clip from NASA:

 

And, here is the info on TRAPIST-1 from Wikipedia.
Posted by Cem at 11:45 AM No comments:
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Labels: exoplanets, space exploration

Zcoin bug and the fix(?)

So, Zcoin code had a bug in it (See http://www.businessinsider.com/typo-bitcoin-rival-zcoin-attacker-steals-400000-2017-2 or similar articles) and it has been patched 5 days ago (See https://github.com/zcoinofficial/zcoin/commit/b20c177032de3c4bfae62b5ada768a5dc2b4fa67)

The nerd in me is crying for the lost test cases! The engineer is screaming bloody hell! Where are the fracking test cases?!

(image from github)


There is more to this bug than this simple change. See first link below for more info, and updates. And, of course, subsequent fixes has no unit nor integration tests associated with them. Yep, src/test folder hasn't been touched for 6 months.


Related:
  • https://makebitcoingreatagain.wordpress.com/2017/02/18/is-the-zcoin-bug-in-checktransaction
  • https://news.ycombinator.com/item?id=13672117
  • https://news.ycombinator.com/item?id=13673214
Posted by Cem at 9:47 AM No comments:
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