Archive for the ‘Science’ Category

Semester Update

It has been a busy, but unexciting semester so far. As I mentioned earlier, I am taking a lab and one course for credit, auditing 3 others and attempting to start up some new research on the side. In the copious spare time that remains, I also am trying to manage my family.

The hardest part is trying to keep tabs on the girls. For a change, all my classes are in the afternoon, so I don’t need to dash out the door early in the morning for a 9 am class. The tradeoff, though, is that I am not around when their school lets out 4 days out of the week, which is tough on the whole family.

The first lab report (Zeeman Effect) has been handed in – it should do well (the draft version got high marks). The second lab (Plasma Diagnosis) is in progress, but has been very troublesome so far. Tomorrow is the last reasonable effort I can make to collect the needed data – report due in one week!

My first (only?) mid-term exam is next Thursday, in Astrophysics. I am somewhat worried about that one – the instructor classifies it as a hard exam. This is the professor who thinks the homework is fairly easy, but it invariably causes stress for most of the class. At least we can bring a sheet of paper with whatever we want on it – and I can write in very tiny print.

My research is totally slacking – I’m supposed to be learning how the outer layers of the sun work hydrodynamically (in order to assist with other work I’m done – I’m not actually studying stars for this research). I’ve just been so swamped lately – in part due to an out-of-town medical emergency (now passed – hi, Mom!) which chewed up most of a week of mental time, in part due to me being a slacker still – that I have not taken the time to truly absorb the material. I need to get my butt in gear before he casts me off.

Right now, I am watching the 2nd Obama/McCain debate instead of doing homework or studying for the probability/uncertainty quiz I have tomorrow, but at least I’m not on the Xbox. And where are McCain’s manners? He ignores Obama while the latter is talking and various other rude moments tonight and throughout the campaign. The worst, though, is totally blowing off Obama’s hand shake offer at the end – he tapped Obama in the back to get his attention, and when Obama turned around with his hand out for a shake, McCain looked at it and turned away! Obama recovered well and turned to McCain’s wife (who did accept the hand) and then continued his business. Manners, Mr. McCain, manners – you must be civil to the Democratic nominee to the highest elected position in the country, even if you despise everything about him (as he must be to you, as the Republican nominee).

This Friday, I am taking a photo workshop with Washington Photo Safari (monuments at night), which could be cool (with the offset problem of possibly getting me too interested in photography again – like I have the time!).

Finally, I am attempting to keep up my training in krav maga at least twice a week – I was on a good roll until a few weeks ago when I lost two weeks in a row. Now I have to get my butt in gear again. I might add on a second type of training (perhaps muay thai) just so I can open up another night or two to work out – the krav sessions just don’t fit my schedule well this semester.

Large Hadron Collider to Destroy the Earth!

Well, not really.

However, it amazes me-although it should not-just how many folks apparently believe it will. Miniature black holes, strangelets, vacuum bubbles and more are expected by doomsayers to pop out and obliterate our world (and, occasionally, the universe).

It is all nonsense.

Even at full power, which the LHC won’t get to until next year, the power of the large hadron collider pales in comparison to the experiment the universe performs on us every single day. So far, cosmic rays striking the earth have performed the equivalent of about one hundred thousand lifetime runs of the LHC on us and, unless I missed a memo, we have not gone poof yet.

A blog on tgdaily.com today mentioned that now LHC scientists, including a Nobel laureate, are receiving death threats against starting up this marvelous machine. Dr. Brian Cox, as usual, has the perfect response. There are many sources explaining how not-at-risk we are here, although Wikipedia, as usual, has a good summary page on it.

One Week Down

The first week of my last undergraduate semester didn’t go so badly, although it did give me a slight taste of what is to come for the rest of this year.

I am taking two physics courses for credit and sitting in three others unofficially. That gives me Sr. Physics Lab, Astrophysics, E/M Theory, Astrobiology and Quantum Mechanics to worry about (total of 11 lecture hours and 6 lab hours per week), plus a weekly meeting with my research advisor (more below) and bi-weekly meetings for astrophysics journal club, physics club and physics club officers (I’m the VP). Plus occasional seminars here and there. Oh, and research to do.

When I stopped to talk with my research advisor, he told me he had come up with not one, but two (unrelated) projects for me to consider. One deals with NASA’s AIM mission and the other with exoplanets. Both are way cool, but I suspect I will be going with the exoplanets one because it fits my interests and (very basic) foundation a bit better. So now I have another hundred or so pages of research papers and presentations to read plus some online work, preparatory to doing a lot more IDL coding. His hope is that the introductory work would keep me busy for the next two semesters (I’ll have a lot more time after this one, since I’ll have no classes at all this spring, most likely) and we would submit an official PhD thesis proposal(!!) next fall.

Of course, we’ve ignored (so far) the fact that I actually have to prepare for, take and suitably pass both the general and physics GREs to get into GMU’s graduate program, but at least I have a direction in which to travel.

And some time during all this (3 days!), my darling children head back to school, so I probably should pay attention to them occasionally as well (plus their mommy).

School Bell’s A-Ringing

First day of the fall semester today.

I started it off with a visit to my research adviser, who has not one, but two different PhD thesis-level projects in mind for me. Gift horse, anyone? One of them involves an active NASA mission. One is related to (but not directly involved with) my Charon work. The first one comes with funding, wherein I would draw a stipend (plus, presumably, funding for conference travel). The second has no funding itself, although Dr. Summers said he could probably spring for a couple conferences.

Now I have to decide between an interesting project I get paid for and a (somewhat more interesting) project that I won’t necessarily get paid for. And since I could conceivably be working on whichever one I choose for the next 6-8 years (although presumably I would eventually find some funding for the latter project – except in the current anti-science administration, that’s pretty well impossible), I need to choose pretty carefully. However, it’s a good problem to have – rather too many projects than not enough (or an unhelpful research adviser).

After that meeting, and some chatting with various friends in the hallways, I headed to Senior Physics Lab. This promises to be quite an interesting class, with two half-hour lecture periods followed by 3-hour lab periods each week. Additionally, we can always get a key to the advanced physics lab to work independently whenever we wish. We each have to work solo (with a couple exceptions) on four different experiments throughout the semester. My first is a study of the Zeeman Effect on mercury vapor. On Wednesday, we have an oral pass/fail exam on our individual experiments which we must pass before we’re permitted to begin work, then it’s radiation safety education and quizzing next week and finally we can begin work.

Following lab I sat in on the first Introduction to Quantum Mechanics course. Although this course is packed to full (every seat taken), I have permission from the instructor to sit in on it unofficially. It is now a required course for all new Physics undergraduates. However, since I am running under an older catalog, it is only optional for me (I’m taking Astrophysics instead), but it is still a good idea to know the contents since a significant part of the physics GRE uses the knowledge. My main surprise in the class is the number of physics majors in there whom I swear I have never seen before. You’d think I would know (at least by sight) all the junior/senior level physics students by this point (since there are only a few dozen total physics undergraduates).

Tomorrow – three more classes (two audits, one for credit)!

Another Semester Ends

The Spring 2008 semester is over, the grades are posted. I hear you breathlessly asking, “How did it go?”

Not too badly.

While I only registered for 6 credits this semester (3 lecture, 3 research), I actually sat through 9 credits of lecture. One extra class was by invitation from my research advisor. The other less invited, but he did not seem to mind (after all, I was a more consistent attendee than half the class). The full rundown then…

Senior Research Project – I talked a bunch about my research project here. I did not do any more flux work since my last post, but did continue working on vapor pressures of certain molecules (N2, CH4, CO and a variety of C2H* species) at very low (30-60K) temperatures. I originally was asked to turn in a sort of journal of my efforts for the grade. Before the semester was out, however, Dr. Summers let me know I had already earned an A (yay me!) for my work, but he still wanted me to turn in a paper which might be suitable for publishing on the low temperature vapor pressures. I finished writing that today and will submit it tomorrow for his review/editing.

Modern Physics – This was a very interesting class — a “survey” course (touching relatively lightly on a number of topics) covering special relativity, introductory quantum physics, Schrodinger’s wave functions, perturbation theory and similar fun. My one big regret is that we did not get to the last part of the book, which deals with subatomic particles (quarks and things). That was what I was looking most forward to! The instructor, Dr. Karen Sauer, is engaging and effective. I enjoyed her teaching and look forward to having her again for Senior Physics Lab next semester. The tests were not easy – GRE-based multiple choice plus course-based quantitative questions. No equations were given (just like in the GRE), so we had to memorize all the formulas as well as knowing how to use them. I studied harder for the final exam (5 full days) than I have for any other exam I have ever taken. Result (including her substantial curve to get the class average up to a B): A+ for the course.

Thermal Physics – I just sat in this class, not signing up for it (or talking to the instructor about it) because I was told it was critical for an astrophysics career (it probably is). However, it is not (currently) required to graduate – just one of a list of electives – and I chose to take a second semester of research for more fun. The instructor, Dr. Peter Becker, was not bad, if occasionally a goofball (humor is good, though). The book, however, was horrible. It was written in 1965 and completely unsuitable to today’s education environment – just page after page of text spamming your eyeballs without a gap. I could not take it and did not even crack the book after the first week or so. I still took very thorough notes throughout the semester in case it ever becomes important to me.

Atmospheric Physics – Another survey course! (Don’t we ever get to learn the real stuff?) This one was taught by Dr. Summers and I sat in it at his request. As expected, it was an enjoyable class full of great slides and interesting information about how the atmosphere works.

All in all, not a bad semester, although I started losing the urge to be in school somewhere in April (about par for me). One more semester of undergraduate courses – currently scheduled for Senior Physics Lab and Introduction to Astrophysics, although I may sit in one or more other classes as well again. We’ll see what happens!