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Wei-Chang Lo
Works at Duke University
Attended University of Warwick
Lives in Chapel Hill, NC, United States
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Wei-Chang Lo

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Excitement is brewing around how much historical remedies can diffuse the current antibiotic crisis. But moving such discoveries from the lab bench to market—where they might do the most good—is proving difficult.
A plant-based ointment recipe pulled from a 1,000-year-old manuscript is spiking excitement about what historical knowledge and traditional remedies can do to defuse the antibiotic crisis. At the s...
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這麼厲害......最近咳到不行,來搞一下好了
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Wei-Chang Lo

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Researchers have discovered how bacteria lose their cell walls to "go undercover" in their hosts: http://ow.ly/KBoUs
Sixty years ago, Nobel Prize-winning scientist Joshua Lederberg first described a biological mystery. He showed how bacteria could lose the cell walls that define their shapes, potentially becoming less visible to the immune system, only to later revert back to their original form and regain their full ...
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I do love an edge-on spiral galaxy. They look so odd! That image above is from the Hubble Space Telescope and shows NGC 7814, a galaxy about 40 million light-years away. That makes it relatively close as galaxies go! It’s a bit like looking at a house in the next...
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Darwin's kids doodling all over the Origin manuscript is one of the cutest things ever.
http://kinja.amnh.org/darwins-kids-doodled-all-over-his-origin-of-species-m-1685423397
We may have Charles Darwin's children to thank for the surviving handwritten pages of the naturalist's "On the Origin of Species" manuscript. Most of the original 600 pages are lost, and of the 45 pages that exist today, many were repurposed by Darwin's brood of 10 children as art supplies.
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Like wines and cast iron pans, some video games get better with age. 
Like wines, fiber supplements, and cast iron pans, some video games get better with age. I recently upgraded my PC. It’s an expensive and irritating process, so I wanted to justify the money and...
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Many metal ions give off a distinct color when submitted to a "flame test," which chemists use to identify whether a particular metal is present in a compound. Some of those flame test colors are illustrated here: http://ow.ly/IpAGD
This graphic looks at the colour of various metal and metalloid ions that occur during flame tests. Most people probably remember doing this experiment in school chemistry lessons, if not with the ...
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Wei-Chang Lo

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Photo of the Day: Your Shot member Szymon Bielikowski captured this image of a glacial lagoon while on a lone journey through Iceland.
Mist hovers over Iceland’s Jokulsarlon glacial lagoon in this National Geographic Photo of the Day from our Your Shot community.
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Ever wondered about the chemistry of colored glass? http://ow.ly/JYaC3
Coloured glass is something that's commonplace in our lives, from the green of wine and beer bottles, to the red, yellow, and green of traffic lights. The origin of these colours is something we do...
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Caught in the act: The seven most revealing fossils ever found http://ow.ly/JkR9r
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Now may be the time to start worrying about the 2038 problem. At 03:14:07 on 19 January of that year, the "long integer" data type used by Unix-flavoured computer systems to store the time and date will reach its maximum and "wrap around" to a negative value. Disappointingly, from a narrative point of view, it seems that many systems will interpret this as a date in December 1901 rather than as a negative time. But it's still easy to imagine the havoc this might cause. Read more: http://ow.ly/ICtWl
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Feedback is our weekly column of bizarre stories, implausible advertising claims, confusing instructions and more
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On the Loom today, I take a look at the biology that makes the measles virus so contagious (and why, paradoxically, that means we could eradicate it from the Earth) http://phenomena.nationalgeographic.com/2015/02/05/how-the-measles-virus-became-a-master-of-contagion/
Here are two recent stories about viruses. They started out alike, and ended up very differently. In October, a woman in Guinea died of Ebola, leaving behind two children, a two-year-old girl and a...
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We'll arrive at the same time

The tautochrone is a curve with a remarkable property: if you let some beads slide down it, they all reach the bottom at the same time!  Ignoring friction, that is.

Even better, this curve is just an upside-down cycloid!  The cycloid is the curve you get by rolling a wheel on a flat road and tracing the motion of a point on the rim.

This was proved by Huyghens in 1659.   He also showed that the time of descent equals the time it takes for a rock to fall a distance of π/2 times the diameter of the wheel you used to make the cycloid!

Amazingly, Huyghens did all this without calculus.  Later, in 1690, Jakob Bernoulli solved this problem using calculus.  This was the first published paper that contains the word "integral" in its modern calculus meaning!

In the picture, each bead slides down the tautochrone, with a little arrow showing its acceleration vector.  At right we see a graph of the distance they travel as a function of time.

It's quite easy to show that the tautochrone is an upside-down cycloid if you use calculus and Lagrangian mechanics - the approach to classical mechanics that says roughly this: a system will move in a way that minimizes its total action.  Its action is its kinetic energy minus its potential energy, integrated over time.

For more see:

http://en.wikipedia.org/wiki/Tautochrone_curve
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Have him in circles
115 people
RainReader Liang (梁世佑)'s profile photo
洪宗漢's profile photo
jing wang's profile photo
林裕偉's profile photo
蔡佳蓉's profile photo
enrique muguerza lecanda's profile photo
黃楷元's profile photo
Andres Jorgensen Sparholt's profile photo
Ning Lin's profile photo
Work
Occupation
Postdoctoral Associate
Skills
Rheometry, microrheometry, Monte Carlo methods, Brownian dynamics simulations, finite element methods, C and IDL
Employment
  • Duke University
    Postdoctoral Associate, 2014 - present
  • National Central University
    Postdoctoral Research Fellow, 2012 - 2014
  • Academia Sinica
    Research Assistant, 2006 - 2008
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Chapel Hill, NC, United States
Previously
Jhongli, Taiwan - Taichung, Taiwan - Bilbao, Spain - Leamington Spa, United Kingdom - Coventry, United Kingdom - Taipei, Taiwan
Story
Tagline
Anar caluva tielyanna.
Introduction
A physicist who loves, among many other things, reading, modelling, music and video games. My research interests are of soft condensed matters, biophysics and nonlinear dynamics.

名字是羅尉彰,一個喜愛閱讀、模型、音樂和電玩的物理學家。​​我的研究興趣是軟凝態物質、生物物理和非線性動力學。
Education
  • University of Warwick
    Physics, 2008 - 2012
  • National Central University
    Physics, 2002 - 2004
  • National Central University
    Earth Sciences, 1998 - 2002
Basic Information
Gender
Male
Other names
羅尉彰