Fourier Analysis is a mathematical tool which can do a number of things: separate out signals from noise; help identify patterns or trends in data; filter out all unwanted data and focus on a single signal; use approximations to make generalizations; make approximations of real world signals (think electronic music); combine harmonics to get a stronger signal. That's what I'll be trying to do here!! Won't you join me with your comments?
Saturday, January 26, 2008
Inertia
As I have been trained as a scientist and engineer, I tend to think about life in terms of the various scientific and engineering principles that I have learned. While some folks joke about "gravity" getting them down, I just blame it all on Newton's First Law.
Picture my husband coming home. The kids are fed and homework is done, but they are basically vegging out in front of the TV. The dishes have not been done. Of the 10 household chores on my list, only 3 have been completed and the rest have seen half-hearted attempts which have been interrupted. I am curled up in my reading corner with the light off and a cold towel on my forehead.
"Everything OK?" he asks.
"Yeah. Blame it on Isaac." I reply.
"First Law again?"
"It's what keeps the world spinning."
"Not really."
"I'm not going to argue Physics with you now. Too much inertia."
"I'll put the kids to bed."
This month it has seriously gotten me in its grip. I can't seem to get started on anything. And the fibromyalgia keeps flaring up. I know the most likely cause is the changing weather which plays havoc with my system. It seems the higher the wind velocity, the stronger my headache. And the more it rains, the stiffer my joints. But a part of me also knows that I am in this pattern and it is not going to go away by itself. I have to act, to exert effort, to effect change. And while the scientist part of my brain is analyzing all this, the inertia-laden rest of my body just continues on in its pattern of everyday routine and nothing changes.
So my first step is to fall back on what I know. I find I can blog about physics and science easier than I can about the on-going stresses in my world these days. So I am tempting myself out of my routine by focusing on a few of my favorite topics. I hope, dear readers, that you still find me interesting, and hopefully not too boring. And maybe you can learn a little something as well as have a laugh at my expense. As a bonus, I promise (inspired by the incomparable Leslie) a future blog about the "Physics of Sex".
Want a short lesson on Inertia? Check out this YouTube cartoon (4 1/2 minutes)!
Monday, January 21, 2008
The Geeky Gal is Back
However, the best laid plans...etc. So while I have started this book, and even managed to read for a full hour on the appointed day, I am far from finishing. So this is no real book report. And it is heavy going. Not because of the geek stuff, though the latter chapters about his contributions to science do promise to be too much for the layperson. No, what I am most moved by is the realization that such a great mind and gentle soul were almost trapped and snuffed out by the fanaticism and hatred that was Germany in the 1930's and 40's. It is amazing that he got out. It is horrifying to think of the other great minds and talents that did not. It is moving to read his humility when he was already in his lifetime a revered and lauded personality. It is admirable that he still maintained his strong pacifism when so many of his relations, friends and acquaintances perished at the hands of the Nazis.
I am so humbled by his writings. And while I expected this to be the case when it came to his mind, I am surprised that this is also the case with his heart. He writes with tender emotion and such wisdom that I finish a passage in tears and find I have been holding my breath for far too long. So I share with you here, in his honor, some of my favorite quotes from Albert Einstein himself:
"The most beautiful thing we can experience is the mysterious. It is the source of all true art and science. He to whom this emotion is a stranger, who can no longer pause to wonder and stand rapt in awe, is as good as dead: his eyes are closed."
"As long as there are sovereign nations possessing great power, war is inevitable."
"The Lord God is subtle, but malicious he is not."
"Any man who can drive safely while kissing a pretty girl is simply not giving the kiss the attention it deserves."
"Something deeply hidden had to be behind things."
"Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction."
"I am not only a pacifist but a militant pacifist. I am willing to fight for peace. Nothing will end war unless the people themselves refuse to go to war."
"Science without religion is lame. Religion without science is blind."
"You cannot simultaneously prevent and prepare for war."
"Anyone who has never made a mistake has never tried anything new."
"A man's ethical behavior should be based effectually on sympathy, education, and social ties; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death."
"Science is a wonderful thing if one does not have to earn one's living at it."
"The secret to creativity is knowing how to hide your sources."
"Humiliation and mental oppression by ignorant and selfish teachers wreak havoc in the youthful mind that can never be undone and often exert a baleful influence on later life."
"The only thing that interferes with my learning is my education."
"Peace cannot be kept by force. It can only be achieved by understanding."
"We can't solve problems by using the same kind of thinking we used when we created them."
"I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones."
"The release of atom power has changed everything except our way of thinking...the solution to this problem lies in the heart of mankind. If only I had known, I should have become a watchmaker."
"Not everything that counts can be counted, and not everything that can be counted counts." (Sign hanging in Einstein's office at Princeton)
And the best one of all, in my humble opinion:
"Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe."
You gotta admit, the guy gives you a lot to think about!!
Tuesday, January 15, 2008
Missing...
Sorry. It has been hectic. It has been stressful. And to top it off I have only just gotten over a 10-day fibromyalgia headache. Not only did I not feel like moaning about it, but looking at the computer screen only made it worse, so I haven't even been lurking. Reading e-mails was about all I could possibly manage. Replying was often too much. I will soon do so to those of you who sent personal queries about my absence. I am better now. Not 100%, but better.
...all the Fun.
Reading was not much better. And my brain was so fried that I found I could hardly remember what I had just read. The only good side is that I get to catch up on all the lovely book reports about the Day to Read that was the brainstorm of the lovely SMID. I owe her one and feel very jealous that I could not take part. But I am sure there will be a next time.
...the Point.
Blogging is something that had become part of my daily routine. And I had some specific things that are close to my heart that I wanted to write about. But somehow I have gotten sidetracked by, well...Life, that thing that happens while we are busy making other plans. I am hoping that things will settle down a bit soon and I can again address some of my favorite topics like science, astronomy, and various ways to make sense of all the chaos around us!
...Link.
Well actually, many links. Singular Saturday. Soap Opera Sunday. Music Monday. Day to Read. And so many fun memes, awards, interviews, challenges, questions,... (sigh). I need to get back into this, but am afraid I will have to do it slowly. And I have a lot of reading to catch up on!
...all of You.
Thanks for the lovely e-mails. It is nice to be missed but I do feel somewhat guilty for not replying sooner. I feel a bit disconnected and kinda lost, but I am confident that as soon as I start reading and commenting I will also be hearing back from you all.
Sunday, December 23, 2007
In Search of my Inner Elf...
I look at my list and realise that yet again the Christmas newsletter to friends and family has not been written to go into the cards. And though I got away with the joke of "Merry Christmas, er...oops!" in the Easter greetings once, really it is not even funny anymore. And when so much of the news is bad you don't even feel like talking about it for fear that it will be such a depressing missive that no one wants to read this time of year. So how do I explain all this in the short note included in the Christmas greetings? (sigh) Go to the next item on the list.
Christmas baking has never been my forte. Okay, baking and cooking are not skills I brag about. I am great at chemistry, which generally prevents any major disasters in the kitchen. But it is not something I do for fun. However, my children love it and I have made the preparations, but still the spirit has not moved me. Besides, I insist that the house be thoroughly cleaned prior to taking on a task which itself will require a major clean-up. So that's what I have been working on all day. Now I am to tired to take on such a major task so maybe it will be something for tomorrow. Back to the list.
Christmas crafts. This was started at the beginning of December, and some cards and decorations were made. But it hardly puts a dent in supplied I have collected and really the kids got on with it by themselves without me having to do more than referee and nag about clearing up. However, since then they have hardly touched the stuff and now I am making the "Tired Mommy" decision and relegating all the supplied back to the storage from whence they came. Finally, something I can check off the list! But of course not without some twinge from a guilty conscience.
Delivering presents round to friends. Now this is something I can get into a bit. Unfortunately as I must drive, I don't get to partake of the wine/eggnog/gluhwein etc. But I can share in the fellowship and I find this does start to thaw the winter chill that seems to have taken over my mood. For some reason this year everyone seems to be tired and run-down. We all joke and moan and commiserate. And I get fussed at for breaking the promises we made not to do any gifts. But I had to do one basket for a friend and it was just easy to go ahead and do 5. And yes, I got a bit carried away and seemed to find the perfect little something that made each gift personalized. But it was the only fun I had in terms of buying for Christmas so all the recipients laugh and grudgingly accept that this was "therapy" of the retail nature and all is forgiven.
There it is. The spirit of giving. That's what has begun to revive the memories of merriment. The thaw in my heart has begun and I am starting to relax. Now may be the time to get out the DVD of "A Christmas Carol" and gather the family round. I might even get a few cards written while settled on the couch in front of the TV.
It won't be a big family holiday, but a small one with hubby and the kids. And in the evening of the 25th we will get together with friends and their kids and the accompanying chaos. On the 26th we will travel to Germany for a visit with in-laws, returning in time to celebrate the New Year with other friends and of course fireworks. The weather has thus far co-operated with some lovely cold days and spectacular frosting of trees and plants, although very little snow has covered the ground and the roads have not been too bad for driving.

I shouldn't complain but I do. It has been a hard year. And the coming one promises to start with further difficulties. Still I have good friends and good blog-friends and that is really what Christmas is all about.
Merry Christmas to you all. I hope you too can find your "Inner Elf" and enjoy the holiday as it is really meant to be celebrated, in the love and warmth of good company, friendship and affection. And here's hoping that the New Year brings joys to temper the sorrows, warmth to ease the coldness that seeps in from the dark corners of the world and hope that somehow in some small way we can all help to make things better.
Friday, December 14, 2007
Trouble Comes in Threes...(Update)
So finally when she felt bad enough to let me take her to the doctor it was of course in the evening and we had to get to the night-clinic. I felt so guilty when describing her symptoms to the doctor because she obviously thought I had waited too long to come. How do you tell someone who has obviously never had kids, much less a prickly pre-teen, that in between bouts of fever and really feeling sick, she was complaining about being bored, working her way through all the computer games and DVDs, asking if she could ride her bike outside, talking on the phone to friends about being at school the next day, and so on? And even when her fever was so high that she was shivering under the covers and I had to hold her for almost an hour, she was absolutely insistent that she did not need a doctor. Unfortunately DH was traveling, so there was no way I could man-handle her into the car by myself if she did not want to come voluntarily. So I sat sheepishly in front of the doctor who informed me that a virus or flu usually starts out with a fever that goes away after 3 days or so, but as she had already had a cold for more than a week before she got the fever, this was obviously an infection and that it was very important that she take all her medicine, drink fluids, rest, stay warm, and try to cough to clear her lungs. As if I had not been trying to do these things for the past week. Nonetheless, my own feelings of inadequacy have now been supported by a medical authority. I am officially now a "Bad Mommy". Maybe I need to design a button for my blog...
I have to laugh or I would just collapse in tears. The other news is also not so good.
My FIL has now had the second surgery in this round of his bladder cancer and the news is not good. They are recommending that he have his bladder removed. This is a hard operation on anyone at any age, but for man of 81 it comes with ominous overtones. It is especially disheartening for him as shortly after he was diagnosed over 2 years ago, his own Brother-in-Law, who is younger than him, got the same diagnosis. But his BIL's course of treatment involved the immediate removal of his bladder. He went downhill from that point on and died 6 months ago. So for my FIL, in his mind removing his bladder is basically a death sentence. But his doctors are telling him that not doing so is just as bad. So my DH is under a lot of stress trying to cope with our homefront issues and support his parents as well.
And the progress in diagnosing DD1 is going so slow, as is the case wherever there is socialized medicine. We have now completed the psychological evaluation, which only confirmed what I already knew about her. First of all, the mental evaluation shows she is "gifted" and very intelligent, almost off the scales for the tests they were using for her. However, emotionally she is behind girls her age. But that is not an unusual combination. All the other evaluations show she is not ADD or ADHD, though she has some concentration problems. And while she has often expressed she "wants to be a boy", she has no body issues which would indicated some sort of trans-gender issues. If there are other sexual issues that contribute to her stress level, it is still to soon to tell. Because of the pattern of behaviour, hormones definitely have some contribution. But clearly there is a chemical imbalance and as the stress builds up she gets more hostile and irritated until we have a meltdown complete with the kind of temper tantrum she used to have as a 2-year old. The trouble is it comes with the ugly back-talk and threats of a teenager as well as the physical strength and violent temper. At times I think instead of a psychiatrist we need an exorcist.
But we have now the preliminary diagnosis of Obsessive-Compulsive-Disorder showing a number of symptoms including the self-harming behaviour of pulling out her hair. She now has pulled out almost one-third and my biggest fear is that this will progress to an even more severe pattern. So we now have our first appointment with a child psychiatrist on 17.January. I am hoping that the holidays don't bring any more stress. I am not sure if I can handle it.
But at least I know what number 3 was and am not so worried about any more bad surprises. I know it is a silly superstition, but for me it does seem to have a pattern and somehow I am comforted by this. And I call myself a scientist...
Tuesday, December 4, 2007
Who is Coming to Your House? (Part VII)
This is the last in my series about the tradition surrounding SinterKlaas here in the Netherlands. For more information, please look for my posts under the same title over the past month: Part I, Part II, Part III, Part IV, Part V and Part VI.
Tomorrow is the big day here, and preparations are well underway in most places. At school they have already had visits by the Piets, many of whom left a big mess behind. One of the things that some classes get to do, if their school has access to an oven, is to make their own "kruidenoten". Kruidnoten are a sweeter, harder version of the pepernoten and I actually find them tastier. Kruidnoten are crispier like Spekulaas or ginger snaps, whereas pepernoten are more like gingerbread. Pepernoten have a more bread-like texture and are more complicated to make. This is an easy, fun recipe for Kruidnoten and I have used it when I helped out many classes through the years. So if you are curious, or just want a fun activity for the kids, I have translated it to ingredients more familiar to the US:
Kruidnoten
50 grams (1 3/4 oz) butter
100 grams (1/2 cup) brown sugar
100 grams (1/2 cup) white sugar
1 Tablespoon milk
250 grams (1 cup) self-rising flour
Spices:
1 teaspoon ground nutmeg
1 teaspoon ground cloves
1 teaspoon ground cinamon
1 teaspoon ground aniseed
1 teaspoon ground ginger
Mix all these spices together until well blended before adding to the rest of the mix.
NOTE: If you have access to commercially mixed "Speculaas kruiden" (spices) then you could use 2 3/4 teaspoons of that instead of the individual spices listed. Allspice can be substituded for ground cloves/aniseed/ginger.
1. Cream the butter and sugar together, then add the spice mix (or spices).
2. Add the flour and milk, mix together until well blended. Sometimes, this means you need to get in there with your hands!!
3. Make very very small marble sized balls of dough and place them on a flat baking sheet with enough room to allow them to spread out and rise a little.
4. Bake for 10-15 minutes at 160 C (320 F) until golden.
5. Let cool until they harden. Eat and enjoy!!
Now I admit to having a weakness for kruidnoten. And especially as they are on sale very cheap after 5.December, I have a tendency to go overboard. Thus I often find myself around Christmas with more than I can eat and the days of throwing at children have already passed. Thus it was great fortune for me to find this recipe that goes well for SinterKlaas, but is also perfect for Christmas get-togethers.
Sint-Tiramisu
I usually double this recipe as it goes very quickly! But you may want to try it first and some portions may need adjusting depending on the ingredients.
250 g (8-10 ounces) kruidnootjes (Instead you can use ginger snaps, German spekulatius, Swedish "pepper-cookies" or similarly spiced hard cookies spiced with cinammon, ginger, nutmeg or allspice.)
100ml (1/2 cup) strong espresso coffee -cooled
3 egg yolks
100g (1/2 cup) sugar
1 packet vanilla sugar (1 tsp vanilla extract)
250 g ( 8oz) ) mascarpone cheese (This may be difficult to find in some areas and may also be rather expensive so one of the following substitutions can be made: 1. 8 oz of softened cream cheese combined with 1/4 cup whipping cream, whipped until smooth or 2. ricotta or cottage cheese combined with 3 tablespoons sour cream, and 2 tablespoons sweet cream, whipped until smooth.)
Beat together yolks, vanilla and sugar in a large bowl with an electric mixer at medium speed until thick and pale, about 2 minutes. Beat in mascarpone until just combined. Lightly butter a large flat-bottomed glass serving or baking dish and line the bottom with about half of the kruidnoten. Pour half of the espresso coffee and let it soak into the cookies. Add about half of the mixture, spread evenly over the cookies. Distribute the remaining kruidnoten over the mix and pour the remaining coffee over the cookies. Add the rest of the mix, spreading evenly until all the cookies are covered. Cover the dish with cling-film and let it sit in the refrigerator for 3-4 hours. Before serving, I like to sprinkle cocoa powder over the top.
Now while I love-love-love the original Italian tiramisu, I find this as an acceptable substitute during the holiday season!!
Monday, December 3, 2007
Who is Coming to Your House? (Part VI)
Click on the titles of the songs to hear a recording of the music only and try to sing along yourself! And with this I make my first entry into:

Source: "Saint Nicholas in Holland", Het Parool, Theo Ramaker | |
Sinterklaas Kapoentje Sinterklaas Kapoentje | Nicholas I beg of You Nicholas I beg of you |
Sinterklaasje kom maar binnen Sinterklaasje kom maar binnen met je knecht. En we zingen en we springen en we zijn zo blij, | Good Saint Nich'las Good Saint Nich'las is in Holland once again And we're singing, voices ringing, and our hearts rejoice. |
O, kom er eens kijken... Meisjes: Jongens: | O, come have a look at... Girls:
|
Zie de maan schijnt... Zie de maan schijnt door de bomen, Vol verwachting klopt ons hart, | Bright December moon... Bright December moon is beaming, |
Zie ginds komt de stoomboot Zie ginds komt de stoomboot Zijn knecht staat te lachen en roept ons reeds toe: | Look here comes the steamer Look, there is the steamer from far a-way lands. Black Peter is laughing and tells ev'ry one, |