Posts Tagged ‘Harvard University’

Need A Valentine’s Date? Act Like You Don’t Like Her…

February 10, 2011 1 comment

This is a pickup trick that guys have used for a while now, but science has now backed it up.

If a guy likes a girl, you will often hear his friends tell him to “act like you don’t like her” or “ignore her” or “subtlety insult her”.

It sounds a bit cruel, but most guys will swear that it works. Of course, anecdotes should not be considered evidence, so let’s stick to real science.

This study appears in this months issue of Psychological Science and is entitled “‘He Loves Me, He Loves me Not…’ Uncertainty Can Increase Romantic Attraction”.

The study involved showing a group of women the Facebook profile of 4 guys. The guys were not real, however.

The girls were then told that each of the 4 guys had seen their profile as well, and rated how much they liked them. There were 3 categories:

  1. The guys liked the girl “a lot”
  2. The guys thought she was “average”
  3. The guys were uncertain if they liked her “a lot” or  just “average” (called the ‘uncertain condition’)

And the results?

Participants in the uncertain condition were most attracted to the men—even more attracted than were participants who were told that the men liked them a lot.

Why is this? The authors hypothesize that it is because the women reported thinking about the men in the uncertain condition more than the other men, which ma have led them to be more attracted to them.

I guess we can all relate to this because we’ve all had crushes on people who didn’t reciprocate those feelings. Somehow, that just makes you like them more, doesn’t it?

Stupid feelings.

The Physics of Coffee Rings

November 24, 2010 Leave a comment

In keeping with the abstract on the physics of jump rope, the 63rd meeting of the American Physical Society has yielded yet another fascinating study.

63rd Annual Meeting of the APS Division of Fluid Dynamics

Volume 55, Number 16 

Abstract: RU.00007 : Coffee ring deposition in bands


  Shreyas Mandre
    (Brown University)

  Ning Wu
    (Colorado School of Mines)

  Joanna Aizenberg
    (Harvard University)

  Lakshminarayanan Mahadevan
    (Harvard University)

Microscopic particles suspended in a liquid are transported and deposited at a contact line, as the contact line recedes due to evaporation. A particle layer of uniform thickness is deposited if the particle concentration is above a threshold; below this threshold the deposit forms periodic bands oriented parallel to the contact line. We present a model for the formation of these bands based on evaporation leading to the breakup of the thin liquid film near the contact line. The threshold results from a competition between evaporation speed and deposition speed. Using this model, we predict the thickness and length of the bands, making the control of patterned deposition possible.

[My comments: The authors used glass particles in a liquid to mathematically model how rings form. They can make these predictions using parameters such as evaporation rate and surface tension of the liquid. Aside from just being interesting, this study may have some practical implications for working at small scales.

Controlling the ring deposition process would be useful for creating such things as new microphysics tools operating at a scale where pliers or other traditional tools for moving particles cannot operate,” notes Mandre. (From]