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Arthur Maltson
Attended University of Toronto
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Arthur Maltson

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The Impact of Vaccines in the 20th Century.

This is such a nice visualization. You can clearly see the impact the introduction of each vaccine had on these United States of Denial of Medical Benefits. I call it USDMB. (I'm just missing the U. Got suggestions?)

It is fascinating to see how some diseases (Measles) were quite prevalent and killing in great intensity, while others (Polio) got going perhaps as populations grew and mixed, with others still (Hepatitis A) were intense, then lighter and then completely gone after the vaccine. 

Polio is perhaps the most dramatic, you can see it attacking us and them BOOM! We drop a world of hurt on polio.

The graphics were featured in the WSJ: http://goo.gl/j2n8Ls There are a few more on that site, please check 'em out. They were originally created by Project Tycho at the University of Pittsburgh: http://goo.gl/jfkmjP
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I love the analysis of popular press articles.
 
Galaxy X

The distribution of hydrogen in the Milky Way is something we’ve measured to a good degree of precision. Combined with computer models we can start to look at the dynamics of our galaxy. For example, back in 2009 a comparison was made between the observed distribution of atomic hydrogen in the Milky Way and possible effects of dark matter. Basically there are variations or ripples in the galactic hydrogen that don’t match up with the known distribution of visible matter, however computer simulations showed that these ripples could be caused by a localized clump of dark matter. That is, it seemed small satellite galaxy comprised mostly of dark matter is perturbing the gas and dust in our galaxy. While it was an interesting idea, proving that the ripples could be caused by dark matter isn’t the same as demonstrating that they are.  But a new paper published in Astrophysical Journal Letters has strengthened the idea.

If such a dark matter “galaxy x” exists, then we should be able to find it. The problem is that a mostly dark matter dwarf galaxy wouldn’t be particularly bright, and what light it does emit could be dimmed by gas and dust in the way. But the simulations predicted a region where the cluster of dark matter should be, so the team began a search in that region. They used public data from the ESO Public survey VISTA
Variables of the Via Lactea (VVV), gathered at infrared wavelengths. Near infrared wavelengths are useful because they are less affected by interstellar gas and dust. When they analyzed the data, the team found four Cepheid variable stars clustered in the same region of the sky near the galactic plane. Cepheid variables are useful because they vary in brightness in a specific way, and we can use that fact to determine their distance. When the team did this they found the stars were all about 294,000 light years away, give or take a bit. It would be very unusual to find four Cepheid variables so close together just by chance, so it is most likely the case that they are part of a previously unknown dwarf galaxy.

In the popular press this new work is generally being presented as the “discovery” of a dark matter galaxy, but that isn’t quite the case. This new work doesn’t conclusively prove a dark matter galaxy. What the work has done is taken an earlier prediction on the existence of a dark matter dwarf galaxy, and found a clustering of stars in the general location predicted by their model. This clustering of variable stars is consistent with their model. Once again it demonstrates the predictive power of dark matter models. It also demonstrates how useful public data can be, since data gathered for one project can be used in several others.

Paper: Sukanya Chakrabarti et al. Tidal imprints of a dark subhalo on the outskirts of the Milky Way. MNRAS 399 (1): L118-L122. (2009)

Paper: Sukanya Chakrabarti et al. Clustered Cepheid Variables 90 kiloparsec from the Galactic Center. Astrophysical Journal Letters 1502: 1358 (2015)
New research finds evidence of a dark matter dwarf galaxy orbiting the Milky Way.
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Today marks 25 years since NASA's Voyager 1 spacecraft saw Earth as a "pale blue dot." Learn more: http://1.usa.gov/1A5np4E
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Agreed, if they sent out a new voyager with an Ion Thruster it'd go much further and faster. I like the every decade idea, or at least every 2 decades. 
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About time. They need a similar release for OS X after the Yosemite disaster.
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Yeah tried to use downcast after your recommendation but it doesn't handle some podcasts. Overall I found the best phone software was still written by RIM. Rock solid and feature rich, too bad they are trailing now. The iOS apps seem juvenile to me with very basic features not present like multi select or rename et al. 
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RIP Leonard Nimoy. So many of us at NASA were inspired by Star Trek. Boldly go...

NASA is mourning the passing of Nimoy, most famous for his role as Star Trek's Vulcan science officer Mr. Spock. Read more: http://1.usa.gov/1DAGvRM
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I get this all the time lol
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The really sad part is when you think you're one but everyone else thinks you're the other. And it can go both ways, and oscillate too. 
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Whatever you think of Apple as a company, they don't stoop to this disgusting level. Lenovo is shipping adware with its laptops. 
Lenovo customers complain about the computer manufacturer preinstalling Superfish Adware on their laptops. Superfish hides in Internet Explorer, Firefox and Chrome and injects advertisements in websites.
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The one thing I will say about my ThinkPad is that their Power Management software gives my battery TONS more life than the Windows power management software.  Not sure what it does, but my battery lasts WAY longer with the same configuration in the ThinkPad power center vs Windows power manager.
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Nice spin on the anti-vaxxer nonsense. #antivaxxer   #parody  
Guys, I wanted to let you know about a personal decision I recently made. I don’t really feel like discussing it, but I want to put my position out there. Please be respectful. This is a really long...
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The Mars Reconnaissance Orbiter passed a mission milestone of 40,000 orbits on Feb. 7, 2015, in its ninth year of returning information about the atmosphere, surface and subsurface of Mars, from equatorial to polar latitudes.

The mission's potent science instruments and extended lifespan have revealed that Mars is a world more dynamic and diverse than was previously realized. Now in its fourth mission extension after a two-year prime mission, the orbiter is investigating seasonal and longer-term changes, including some warm-season flows that are the strongest evidence so far for liquid water on Mars today.

The orbiter has returned 247 terabits of data, which is more than the combined total from every other mission that has ever departed Earth to visit another planet.

Learn more: http://1.usa.gov/1IFZBLX 
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Firing off a string of action snapshots like a sports photographer at a NASCAR race, our +Hubble Space Telescope captured the rare occurrence of three of Jupiter's largest moons racing across the banded face of the gas-giant planet: Europa, Callisto, and Io. Details: http://go.nasa.gov/1FaD4kY
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Have him in circles
119 people
Karthig Balendran's profile photo
dimas vanmiller x's profile photo
валентин каленский's profile photo
Matt Mastracci's profile photo
Анатолий Джаловский's profile photo
Georgina Kalo's profile photo
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  • University of Toronto
    2007
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