Letters to a Persian Cat » navigation | Letters to a Persian Cat

The incredible Moon

admin — Sun, 10 Mar 2013 17:07:05 +0000

Ghazal Dear,

did you ever wondered why so many people are fascinated by the moon, which in fact has much less an impact on our physical life than the sun? Is it only its position close to the earth and the notion that the movement of the moon is completely depending on the existence of earth? Since unlike the sun, which is like a superpower that nurishes us with its energy but in fact could easily exist without the Earth, the moon is more like the Earth little sibling. Assuming the Earth would suddenly disappear, the moon would leave its orbit and escape into the endless space with a velocity of about 8800 km/h. The sun, however would not even recognise that the earth has disappeared.
It is perhaps this fascination that a large object as far as 380 thousand km away is still completely dependend on us that makes us feeling a some sort of almost intime relationship with the Moon.

Some people believe that the moon phases have a direct and immediate influence onto living organisms on Earth. But appart from the obvious change in night darkness between new and full moon, and the corresponding impact on sleep or nocturnal activity of creatures and people, there is very little solid scientific proof that human health or plant physiology changes with the moon cycle.
But it is not only myself who is amazed ones every month when the full moon rises above the horizon. Have a look at this short video sequence some astronomer did in New Zealand during January full moon. It is a real-time video shot at night with people observing the rising full moon (source: NASA Astronomers Picture of the Day).

It is most likely that the idea of the moon interfering with human physiology and health has its origin in the coincidental similarity of the period of femal oestrus cycle with the duration of the lunar cycle. But despite the apparent similarity between the 29.5 days lunar cycle period (or 27.3 days rotation period around the Earth) and the average 28.5 days of the femal oestrus cycle, there is no synchronity between these two oscillations.

But there was one observation that – for a short moment – made me wonder: Almost with the same frequency that I send to you images of the full moon every 28 days, you send back answers. It did not matter whether I send you just one or twenty e-mails per month: You always answered one per month, and this in very fixed intervalls. Therefore I was almost wondering if it is not so much your free will to write me occasionally, but more the result of a regular hormonal up and down that prompts you to reply to my letters.

Take Care
Michael

Island in the Stream

admin — Sun, 22 Jul 2012 23:07:04 +0000

Ghazal my Dear, do you recall this place ? It was dark at night two years ago, and we had a camp fire there, and the river had less water, so we could enter what now looks like an island. You tough me the arts of flipping flat pebbles over the water surface, and when we went home later at night there were hundreds of fireflies that made the nocturnal sky looks like your hair. This year it is still pretty chilly, fireflies are still waiting for warmer days. The lonely fisher-man has to wear a wet-suit. But surely, later at night there will be camp-fires again, and people who wade through the water to gather with their friends.

Pebble Island in Isar river, north of Oberföhring reservoir

Take Care,

Michael

Größere Kartenansicht

Natural Confusion

admin — Fri, 06 May 2011 14:12:42 +0000

Ghazal my dear,
I hope you don”t mind me adding to our long lasting conversation and exchange of ideas some external thoughts. A witty blogger at Iranian.com (called ComraidsConcubine) posted this dialogue and therefore in a most intelligent way paraphrased the wide-spread ignorance about nations and cultures.

If you want to read more of Comraids Concubine thoughts, go to her blog in english or in persian.

Take Care, enjoy the evening
Michael

A Night Walk at Full Moon

admin — Sun, 17 Apr 2011 07:21:03 +0000

Hi Michael,

I just arrived at home, after driving my friends home. Very tired. I sweared to myself I wont do this any more. You know what happened ? In the middle of the night, more than a kilometer away from home, my car stoped without any obvious reasons (Except for a loud noise that came from somewhere under it). Hey, what is this with your german cars? It is a Benz (o.k., not very young any more), how can it just let me stand alone on the road in the middle of the night ? The disgusting thing was that my mobile also was low on battery, so can you imagine I had to walk home at 2 o”clock a.m.?
My only rescue was the bright, full moon. It was so strong, that I could always see my moon-shadow.

Hope you are fine, sleep well.
TAKE CARE,
/ghazal

————————————————————————————

Ghazal my Dear,

Poor you, must be a frightening experience to walk home in the middle of the night. I guess it was not the kind of walk that you liked so much here in Munich, where you had your thoughts flow and your vitamine D pool recharged in the sun. I have to estimate, if and how much moon-light is sufficient to synthesize it. But I guess it has no UV-A, what do you think ? By the way, wouldn”t it be an interesting project to study photobiology in cells using only moon-light ?
So you worked as a driver again. I suspect people exploit too much your refusal to drink alcohol at the party, and at the end invite you as their driver.
The moon was visible here as well. If you can, make a photo of your moon shaddow.
The one below I did in our garden.

Take Care, my Cat on the Moon,
Michael

Relax with the kinetic sculpture

admin — Wed, 19 Jan 2011 20:35:00 +0000

Hi Ghazal my Dear,

Reading you last e-mails I got the impression that you are most excited if I send you links to some “moving pictures” (the origin of the word MOVIE, as you perhaps know). The german translation is KINO, which comes from french CINEMATOGRAPH, meaning “moving or kinetic image” and what gave rise to the english CINEMA.

Why I tell you all this stuff ? Not only because I remember the films we saw together here in Munich, and the nice time we had before and afterward.
There is another reason, and this I discovered last weekend at the BMW museum (can”t remember if you went there with your family or with Shava). Perhaps the most impressive object in the museum is the so-called “kinetic sculpture”, an arrangement of steel balls hanging on wires and thereby can all be individually moved up and down controlled by a machine. And this generates the most astonishing images of slowly moving 3D-sculptures.

I am almost sure, Ghazal, you will like this. And I am also sure that you work hard these days, same as you did during your MSc project here, and therefore you deserve some relaxing videos at night.

Enjoy, Take Care

Michael

As always, I hope you are doing fine and stay as nice and charming and strong as you have always been.

PS: Had a look at the swedish word for cinema, and this is Biograph. No clue what “Bio” means therein. There is a type of apple, which is called Boskoop, but this I guess is a coincidental similarity. And Cinema is written in Persian as
سينما.
And here, you see, I don”t even know how this is pronounced. So many things I”d like to ask you.

The Velocity of Time (and how we experience it)

admin — Sun, 28 Nov 2010 08:11:26 +0000

Hi michael,

okay, so 4 institutes will go together and become the department of radiation research? which institutes are these?
the movie that you mentioned i have never seen before. Gustafsson is a very common name.
time pass to fast, unbelivable. just enjoying the free days that i have left. hope time goes slow!
hope you had a good weekend.

/ghazal

………………………………………………………………………………………………….

Hi Ghazal my Dear,

So nice reading your mail. I just came in, we went out for a long walk because it was a beautiful Sunday, icecold but sunny. Finally, winter started here as well. This year it was a perfect program: We had almost later summer temperature till first half of November, and now, two weeks later, already winter climate. This intermediate autumn, with its wet and windy temperature lasted only two weeks.
I went swimming today in the little river next to our house (maybe you remember I wrote you in summer about it, it has several old stone bridges spanning over its cristal water). Swimming is still fine there, the water is warmer than the air (about 6 degrees I guess). After taking a bath for a minute, one gets very hot (think its like a counter-reaction of the body, like adaptive response).

The three institutes of the research-center that officially fused to form a Department are Radiation Biology, Radiation Protection, Cytogenetics and Medical Radiation Protection. I think the idea was more to save the institutes from beeing closed down, since there is actually not very much scientific exchange between the 4 institutes. Its merely political.

The center of Munich is very crowded nowadays. People start X-mas shopping, its crazy. I think people, although they are mostly catholics here, have forgotten that christmas has a non-comercial tradition. But I”m quite sure, you would also like it, to join millions of other people on their caravan through the department stores, don”t you ? What I like about the winter time in the city center is a big scating course they do on the Karlsplatz/Stachus (you might remember, where in summer-time there was the big fountain). This is really fun, one can do ice-scating, or just watch the other people doing it, or eat some grilled saussages.

I talked last week to Mrs. Friderike E-S, who studied UV-repair her whole life through. I asked her about the problem, if cells of different origin differ in their UV-repair capacity (depending on whether or not they can be exposed to sun-light at their normal position of the body). I told her that our hypothesis was that cells that origin from inside the body (lymphocytes, endothelial cells, neurons, muscle-cells and so on) might have a much lower UV-repair capacity than cells that are naturally sun-exposed (like skin fibroblasts or -melanocytes or epidermal or retinal cells).
She explained the following: There is no special DNA-repair system just for UV-induced damage. The nucleotide-excision and base-excision repair systems are essential to remove DNA damages induced by chemicals as well, like alkylating agents or free-radicals. And since these agents can cause DNA damage anywhere in the organism, most cells have the capacity to repair base-damages, 8-oxo-guanine, thymidine-dimers and all the other lesions, and therefore they are also prepared to repair these damages if they are induced by UVA-exposure in the laboratory.
I wrote some ideas about this on my blog, in case you want to read. Ghazal, I hope you don”t mind that I wrote it like a scientific dialogue, and it reads as if this fictional person “Ghazal” explains this. Hope you don”t hate that I put the words into the mouth of somebody else.

You wrote in your mail that you feel your time is passing very fast now, and you would like to slow it down a bit. I think it might depend from where you observe this. If you mean the present time, the moments you are just experience now: they seem to be short and run fast, if you are busy, if you have something important to do. Like when you did your thesis during the last weeks of September/October, I guess you felt that the few hours of the day passed away like minutes. But if you look back to such a busy period of your life, it seems as if this expanded, because you filled it up with something important. This for me is most obvious when travelling. If you finally arrive at your destinations in the evening, you just can not believe any more that 12 hours ago you still were at home. It seems as if this was many day ago. Do you know this feeling, Ghazal ? I guess so, because last year you also traveled a lot.
But this changes to the complete opposite, if one has nothing to do. Than the time one actually feels at the moment passes very slowly (for instance if you have to wait at the dentist or for a bus that does not arrive). It feels as if the minutes are hours. But later, if you look back, a period of your life where nothing important happened can appear very short.

I hope you are not fed up with all these long essays. You don”t have to answer them all, but I”m always very happy reading some words from you.

Take Care, Ghazal

PS: Yes, I would have been surprised if you would know this movie with Greta Garbo. I also saw it just by chance in the TV, because Leo Tolstoy, who wrote the novel, died 100 years ago. But if you just click on the youtube-link that shows a short scene from it, don”t you think its amazing, how Greta Garbo appeared trough the steam of train ?

A Joint Meteor Party

admin — Tue, 16 Nov 2010 16:58:15 +0000

Hi Ghazal my Dear,
You recently raised the issue of spotting simultaneously the same meteor from your place in Stockholm and from here in Munich.
It appears it is not as simple as you thought, since you cannot compare it with the moon, sun or stars that, if they are high enough always look the same from here and from there. The difference is, that meteors, once we see them glowing, have already entered the upper layer of the earth atmosphere (about 100km altitute). And therefore, it is a matter of whether they are still above the horizon of an observer or below, and this determines if they are visible or not. Trigonometric calculation (see below) shows, that a meteor coming down as far as 1121 km from the location of an observer would still appear above the horizon (and therefore be visible). Munich and Stockholm are exactly 1310 km distant from each other (on a direct line, not motorway, railway or flight), and therefore each meteor coming down halfway between the two would easily be visible (since the distance to each of the two observers would only be 655 km).
And even more, all meteors coming down within a +/- 54 degrees radiant around the direct line could also be visible (i.e. about one quarter of the whole skies circumsphere, what is not too bad). So my suggestion for the Leonides meteor-shower on the 17th of november is: If we two agree on a defined observation time (maybe one hour around midnight), and we both look in the right direction, and there are no clouds, and we are lucky, and we believe in this calculation, and the Leonides shower has not choosen another trajectory this year, and there are now vampires biting us at night, and there are no drunken guys distracting us, and no haloween – kids begging for sweets, and no snowmen melting next to us and and and ….
then we might be really lucky and both spot the same meteor at the same moment. Our wishes, most likely will neutralise each other, I”m sure, so life will carry on.

TAKE CARE, my Dear

Michael

……………………………………………………………….

Hi michael,

So your calculation shows that if I would look southward from here and you would look northward from Munich, we would both spot the same meteor tonight ? Does your calculation also considers by chance the outside temperature ? You can”t expect me to wait outside our house for an hour tonight, since we have already snow here and its freezing cold. And anyhow, even if I would spot a meteor tonight, even knowing that the same is visible from Munich, it would not be the same as at was in August, when we were watching the Perseides shower. Then it was warm, a nice summer night, and it was fun to be there together. I think I will skip the “stjaernfallen” tonight. But your calculation should equally hold true for next years Perseides in August, right? But then, who knows, maybe I”m back in Munich, and the 1310 km distance is obsolet.

I wish you a pleasant night anyway

Take care

/ghazal

PS: I could stay inside and try to spot some of the meteors tonight through the window, can”t I ?

……………………………………………………………….

Ghazal, my Dear,

Assuming there is a clear sky tonight, you might spot a meteor through the window, why not.
Which side does your window face ? north, south ?

Michael

……………………………………………………………….

Dear michael,

I checked, the window of my room faces north, and our kitchen to the west. What is the best ?

/ghazal

……………………………………………………………….

I guess if you watch through your window northward, you perhaps wont see the meteors, but you have a good chance to see Polar-Light. By the way, since Polar-Light comes also from the upper atmosphere (like the meteors), the calculation is equally valid for them. This means, you might see the same Polar-Light looking northward as an eskimo in Greenland or a reindeer farmer in Lappland.
But they don”t know about you, they have never seen the magic of your blue eyes, my Dear. Maybe for them the polar light is frightening or a common feature, they have probably no association with it, not that a particular person they miss a lot is watching it at the same time.

O.k., I have to accept that the november Leonides shower is a not the most suitable, despite all the calculations. However, in case I spot a meteor tonight, I”ll imagine that at least in your dreams you see the same one, and that it takes you on to an angel flight through the night sky.

TAKE CARE, enjoy

Michael

Spot the Stjaernfallen next week

admin — Wed, 11 Aug 2010 16:06:33 +0000

Hi Ghazal my Dear,

Don”t know were you spend the evening tonight, but I”d like to remind you of the Perseiden Stjaernfallen that are most prominent these days. I think to watch them is also a good remedy for the sadness that one usually gets before beloved people leave.

Since the next two days might be quite cloudy, I think tonight is the only chance to view the fallen stars (nice term, isn”t it. Maybe we can see fallen stars like Whitney Houston, Britney Spears or Mikey Rourke tonight, or Michael Schumacher, Maradonna and the like).
To be honest, real Stjaernfallen are much nicer than these celebrities that greet us every day from the yellow-press.
To help you find the Perseides and have a good chance to spot some of the meteors, I made a scheme for you to get an orientation on the night sky.

First try to find the northern direction (from your house look towards the Olympia TV-tower). Then turn your head further to the right, untill you see somewhere a very prominent constellation of stars called Cassiopeia (like a hughe W on the sky). Below or slightly left of Cassiopeia (depending at what time at night you are there) there is the constellation called Perseus, and the Stjaernfallen should originate from this site.

As I told you, according to mythology, you can express a wish whenever you see a Stjaernfallen, but you should not tell anybody about it.
I saw some already yesterday night, and I hope that neither of my wishes collided with your future planing. I tried to avoid anything that is related to the place or the country where you want to do your PhD project (I think this question is too much conflict-loaded).
Therefore, I”ll continue with wishes that I think everybody can live with.

Would be nice to read some words from you

Take Care

Michael

PS:
Just to avoid any confusion on the night sky: the description above referes to the site of I.s house. In case you are in Unterschleissheim tonight, you have to look north, but this will be almost opposite to the Olympia-TV-Tower. Standing in front of the guesthouse, you should then turn your eyes to the left (along Edith-Stein-Strasse).
Maybe you are not in the mood to watch the stars tonight at all. But be careful, than all my (crazy) wishes might come true.

Take Care, my dear

Michael

Quantum Entanglement, Dogs and the Problem of Longitude

admin — Sat, 07 Aug 2010 09:51:40 +0000

Hi Ghazal, my Dear,

Hope you didn” got lost on your Random Walk (swedish “Slump Promenade”) through the Olympia shopping mall.

The swedish “Slump” (for Randomness) is really a very, very strange word, isn”t it. And in research, randomness is always what we like to minimize because it tends to obscure our observations, which we would like so much to interprete as a result of shear causality. In the formular for the genetic LOD-score = log10 (Likelihood for Linkage by causative gene)/(Likelihood for Linkage by chance) it is the denominator standing below the fraction line.

Interesting, in the swedish Wikipedia-entry for Slump/Randomness there is a indirect link to a subject I already mentioned recently: Quantum Entanglement or Kvantmekanisk sammanflätning. This subject is still a hot issue between opponents and proponets of the quantum-mechanics. But there is good evidence that it works. The principle is as following: You take two particles that form a pair (having a joint wavefunction) and therefore are dependent from each other in their quantum-mechanical status. When you separate them spatially, their joint wavefunction remains and therefore their correlation is preserved. It is now believed, that by “taking on of these particles with you” wherever you go, and leave the other particle at home, you always can determine the status of the remote particle. A recent study published in NATURE estimated, that the speed by which information can be exchanged this way is about 10 000 times faster than speed of light.
My proposal, you remember, was to use our two twin DKNY watches for a permanent informational link between us, because their status I believe is already “entangled” .

A funny idea emerged in the 18th century, assuming an extra-sensual information transfer could solve the problem in sea navigations of how to keep the precise time from their home country (this was crucial to determine the longitude). There was the hilarious theory that if you take two dogs from the same litter (virtually twins), and you leave one of them at home and take the other one on board a ship that will go around the world, then the two dogs remain linked to each other by a transzendental and telepathic connection. Therefore, whenever the dog at home is hurt (for instance by peeking it with a needle), the other dog on-board the ship instantly feels the pain and howls loudely. So when the dog that is left home is hurt once a day at 12 o”clock midday, the people on board the ship hear the second dog howling and this way they know precisely when it is 12 o”clock at home. Funny idea, isn”t it.
Unfortunately (but maybe furtunately for the dogs) this project never worked ;-}, and finally the english carpenter and self-educated watchmaker John Harrison constructed in the year 1735 the first ship chronometer that run precise enough over many weeks on board the ship and therefore allowed the determination of the geographic longitude.
Although the strange idea to use dogs telepathic abilities for this purpose was born in England in the 18th century, it later appeared so hilarious that nowadays the english Wikipedia refers to it only in an entry on “Powder of Sympathy” rather than in its larger article on “The problem of Longitude“. The german, as always very open to strange and esoteric ideas, still reproduces this telepathic dog hypothesis in their Wikipedia.
But who knows, maybe today with the knowledge of quantum-mechanic entanglement we can make it work using our two watches.

Enjoy the time, my dear, don”t condemn me

Michael