23 June 2008

T minus 24 hours & Naughty Nurses

So my first year viva is at 11 am tomorrow and I am dreading it maybe especially because I haven't really started any work or revision for it yet, oh dear Jen. I might not go into uni until this afternoon and kick things off at home, I can at least do the summary here and practise that a little bit.

There ain't no rest for the wicked.

I have had a rather good, or at least interesting, weekend. After planning to spend Friday evening relaxing and doing viva work, I ended up painting all 20 nails bright red in preparation for the red and white nurse's hen night on Saturday. Then R texted me and I ended up going to the club 42nd Street aka 42's. It was a good night and I didn't have a lot to drink (3 drinks) but for some reason I was very sick when we got home at about 3 am. Then the next day, I was literally a nurse all day, nursing R as he was violently sick 3 times, whilst still not feeling well myself. We are thinking there was something wrong with either the vodka or the red bull, or both.

I managed to pull myself together for the hen night dressed as a nurse. Two girls got quite drunk at the brides house and had to shortly after we got into the club Opus, one at about 11 pm-ish and the other not long after at 12 am-ish each with their chaperones in tow so we were down 4 girls. Well, we stayed there for a while, till 1 am and then drove to a karaoke bar Vina but there were too many girls for the car so I had to take the seat in the boot! There was actually more room than in the car and it allowed me to have a few micro-sleeps. Genius.

It turned out to be very fun but I am not sure whether I liked all the attention and pictures taken by complete random strangers though. That was pretty much my weekend. I shall now have to get down to some work!


  1. Howdy Jen:

    I'm a PhD student myself (Geophysics, MS in physics). Ran across your name through gaaduatejunction. Was interested in astronomy, but you caught my eye with "laser tweezers". How does that work exactly?

    Wishing you luck in your PhD studies!


  2. Hi John,

    nice to meet you fellow PhD student. Thanks for the comment and for stopping by my blog.

    Laser tweezers trap micron sized dielectric particles e.g. polystyrene beads, and work by focussing a laser beam using a high numerical aperture objective lens to a focus. The This focused laser beam transfers momentum to a particle. By the conservation of momentum and Newton3, the particle is pulled into the lasers focus if the refective index of the particle is higher than that of the surrounding meadium, as in the case of polystyrene beads in water. You can perform a range of different experiments with laser tweezers e.g. microrehological measurements of media and materials. A lot of scientists simply use laser tweezers for holding particles still while they perform other measurements on them. By changing the polarisation of the laser using quarter wave plates and so on, trapped particles can be made to rotate. An example application of this is in the field of microfluidics; two adjacent trapped particles in a liquid can be made to rotate in opposite directions to produce fluid flow between them and hence, fluid transport or even transport of other particles, through the fluid. The rotation of small structures like nanotubes or nanorods produces what are termed nanorotors.

    Well, I hope that's given you a good overview and not been too boring and I know it won't have been too complex for a fellow physicist like yourself. The momentum transfer between laser beam and particle is a lot easier to explain with a diagram though. =)

    Good luck in your studies too John.