viernes, 15 de febrero de 2008

Humidity

I'm writing today's post in English because I want to increase the readers by 100%. If my calculations are correct, TWO persons will be able to read it and maybe leave a comment. Compared to my only ONE reader until now, that's an increase of 100% (approximately...). I also want to change the design of the blog because, according to my statistics, HALF of the readers demand so. Statistics are easy.

I never paid attention to humidity in my life. Ambient-humidity. That's until I came to Jena, one of the most humid towns in Germany, I guess. Still, I didn't pay further attention until it happened to me. The spooky "Schimmel" (fungi) appeared on the walls of my house. Buying the anti-fungi spray was only the start. The thing is, I live on top of a shop where they sell hygrometers, they always have one in their showcase. I decided to keep track of humidity in myself, so I bought one. Now there I was, everyday comparing the web value with the one of the shop with the one in my house. Scarily, mine was the highest (>90%), no matter how much I ventilated my flat (and YES, I know there are different ways of ventilating your house, Germans even have SPECIFIC NAMES for that*). I re-calibrated my hygrometer several times, until I arrived at the conclusion it was wrong. What did I do? You should have guessed by now! I bought another one, a digital one! Yes, even the NAME of it made me wanna buy it: "Digitale Funkwetterstation". And guess what...It shows an absurd low value, smaller than 50%, while the analogical one, on the same shelve, displays 80%. So, what's the probability of buying TWO defect instruments? I may not have Schimmel anymore, but I AM definitively paranoid.

Me and some ther guys from the lab just came from a retirement party of a professor. Now here's the question. What's the earliest time one can eat Thüringer Bratwurst? I mean, they were there already since ten o'clock eating bratwurst with senf, and even for German standards that should be early. The thing is my metabolism got all cornered and between eating Bratwurst and eating some Ferrero's chocolates, I took the Ferrero's. Honestly, what would you have done?

(*) There's Stosslüftung and Dauerlüftung, for different purposes and times of the year.

5 comentarios:

Anónimo dijo...

Jo, que complicao, pues bueno, yo seguiré comentando en cristiano, o parecido...

Espero que no hagas las tortillas de setas... Si no me mantendré lejos de ellas...

Si tienes un reloj sabrás la hora si tienes dos nunca la sabrás...

Y bueno, yo he tomado esa especie de carne cruda que toman con pan y cebolla tambien cruda, junto al te a eso de las 10... Allá donde fueres...

Y ya que vas a tocar el diseño, los comments en ventana a parte, anda, que mola más no perder el post de vista...

Anónimo dijo...

Half of Raul demanded that you change your design? Statistics sometimes are so counterintuitive!

Anónimo dijo...

Allow me to create an impression that some of your readers are completely coo-coo-bananas.

Question about humidity brings up to the question about blood pressure. There are three values: arterial systolic, arterial diastolic and venous pressure. The first two can be measured using sphygmomanometer (my favourite one, with the real column of mercury, is hard to find these days, but this is not the point). But how do you measure venous pressure? I found one amateur way. I stuck the medical needle into my vein (not myself, I have asked nurse to do it) and connected to the needle a thin plasic tube filled with physiological solution. The height of the solution column was about 25 cm. Density of mercury is ca. 13.5 g/ml, which gives venous pressure close to 18.5 mmHg. Interestingly, unlike in the case of arterial pressure, there were no visible oscillations of the column height with the heart beat.
Now the questions. First one: if the heart stops beating, would there be blood pressure? Perhaps yes, at least to some extent. Elastic blood vessels would be still pressing on the blood and this could support the column of mercury.
Second one: blood is to a good extent an incompressible liquid. Thus, if we forget viscous forces, Bernoulli's equation should be valid. Thus, knowing the overall cross-sections of arteries and veins and the arterial pressure, one can predict venous pressure. My average arterial pressure is (115+85)/2=100 mmHg. Am I right thinking that the overall cross-section of my veins is about 5 times larger than that of arteries? Or is it against the human physiology?
I don't want to peek in Wikipedia, I want to see if it can be understood ab initio.

Guille dijo...

Peter, for G*d's sake, get yourself a blog will ya? The community awaits!

Jose dijo...

Me alegra ver que sigue tu interés por las humedades transcendentales!!! Miralo por el lado bueno, las plantas no hay que regarlas ¿o sí?

Con respecto al diseño, si cambialo, mira a ver si puedes ahcer que no te ocupe toda la página, deja unos margencitos por los lados para que se vea el fondo. Ya sabes, la usabilidad ante todo.