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Thomas Fester (Scivit)
Germany
Приєднався 10 чер 2014
I 've been working as: a scientist, a teacher, an illustrator, and various other stuff ... and I'm still interested in science. Most of my future videos will go into one of five playlists: 3D-modelling (very old hobby), soil (prominent topic from my scientific past), evolution and organisms (always interesting), climate change and Earth observation (unfortunately most relevant) and latest news. I hope you enjoy the contents! Comments, questions etc. are always welcome!
How to model a beech leaf
Hello and welcome to my new video. This time, as in the last one, it is again about leaves and this time I will do something a bit more complex than the simple petal from my last Video. I will go for a beech leaf. Scripts for the models shown in this video can be found on my github account (github.com/tjrfester/Modeling-nature-planar-structures).
Переглядів: 14
Відео
Wie modelliere ich ein Buchenblatt?
Переглядів 2321 день тому
Hallo und willkommen zu meinem neuen Video. Diesmal geht es, wie schon im letzten Video, wieder um Blätter, aber dieses Mal werde ich etwas Komplexeres machen als das einfache Blütenblatt aus meinem letzten Video - ein Buchenblatt. Skripte zu meinen Modellen aus diesem Video findet Ihr wie immer in meinem Github-Account (github.com/tjrfester/Modeling-nature-planar-structures).
Wie modelliert man flache Strukturen
Переглядів 19Місяць тому
Flach is beautiful, aber gar nicht so einfach... Hier zeige ich Euch einen Ansatz für "mäßig gefaltete Blätter". Da kommen dann natürlich noch mehr Videos zu dem Thema... Die Skripte findet Ihr wie immer auf meinem Github-Account: github.com/tjrfester/Modeling-nature-planar-structures
How to model simple planar structures?
Переглядів 13Місяць тому
Today it is about simple planar structures and I will show you my approach for, let's say "moderately folded sheets". Scripts can be obtained as always under Github : github.com/tjrfester/Modeling-nature-planar-structures
Modellierung von Fraktalen über nested loops
Переглядів 45Місяць тому
Hallo alle zusammen! Mit diesem Video stelle ich Euch einen allgemeinen Ansatz zur Modellierung von Fraktalen vor - über zwei geschachtelte Schleifen. Ein Fraktal werde ich recht ausführlich vorstellen, für die übrigen findet Ihr die Skripte wie immer in meinem Github-Account (github.com/tjrfester/Modeling-Nature-Fractals).
Nested loops for programming fractals
Переглядів 173Місяць тому
Hello everybody, this video is about a general approach of using nested loops for modeling fractal structures. I will show one structure in detail. Details for a few others can be obtained from my Github-account (github.com/tjrfester/Modeling-Nature-Fractals).
Wie modelliert man Fraktale mit Lindenmayer-Systemen?
Переглядів 602 місяці тому
Mit Hilfe von Lindenmayer-Systemen kann man viele verschiedene Fraktale konstruieren - von komplizierten natürlichen Strukturen bis zu den einfachen geometrischen Beispielen hier. Im Wesentlichen benötigt man eine geometrische Grundform und eine Ersetzungsregel, die man mehrere Male durchführt. Alle Skripte und Programme in diesem Video findet Ihr in meinem Github-account (github.com/tjrfester/...
How to model fractals using Lindenmayer-systems
Переглядів 1382 місяці тому
Lindenmayer-systems represent a basically very simple approach for creating fractal structures. Here I will only show some simple, quite formal examples, but you can also produce nice natural shapes. (Have a look at wikipedia). Basically Lindenmayer-systems work by starting with simple geometric forms and then applying certain replacements. All scripts and programs mentioned in this video have ...
Wie modelliert man Wurzelsysteme?
Переглядів 622 місяці тому
In diesem Video präsentiere ich Euch einen weiteren Ansatz, neben dem fraktalen Ansatz aus dem letzten Video, um Wurzelsysteme zu modellieren. Grob gesagt geht das Modell von der Hauptwurzel, zu den Seitenwurzeln erster Ordnung und schließlich zu denen zweiter Ordnung. Im Video stelle ich vor allem die allgemeine Strategie vor - weitere Details findet Ihr in den Skripten in meinem Github-Accoun...
How to model root systems?
Переглядів 302 місяці тому
The fractal approach from my last video is only one approach for modeling branching. Here, I am showing you another approach, where you model a root system in the order "Main root, first order laterals, second order laterals". In the video I am mainly presenting the overall strategy. For details of the script have a look at my github account: github.com/tjrfester/Modeling-Nature-Branches.
Wie modelliert man fraktale Verzweigungen?
Переглядів 1212 місяці тому
Skript-basiertes Modellieren ist besonders gut geeignet um fraktale Strukturen zu modellieren und fraktale Verzweigungen machen da keine Ausnahme. Hier zeige ich Euch verschiedene Beispiele dazu. Die entsprechenden Skripte findet Ihr, wie immer auf meinem Github-Account (github.com/tjrfester).
How to model fractal branching?
Переглядів 5742 місяці тому
This video is presenting my approach for modeling fractal branching. As you will see, script-based modeling is an optimal tool for modeling fractal branches. (And I will show you in later videos that it is an optimal tool for modeling fractal structures in general.) The scripts used for this video are available on my github-account as always. (github.com/tjrfester)
Wie modelliert man pflanzliche Zellen?
Переглядів 433 місяці тому
In den letzten Videos habe ich Strukturen vorgestellt, bei denen bestimmte Elemente die Position und/oder Orientierung anderer Elemente bestimmen - hier geht es um Elemente, die die Form anderer Elemente bestimmen. Als Beispiel wähle ich ein pflanzliches Grundgewebe, bei dem sich die Zellen gegenseitig in ihrer Form beeinflussen. Man kann es sich vorstellen wie eine große Mengen Kugeln, die sic...
How to model plant cells?
Переглядів 363 місяці тому
In recent videos I have shown you how to model structures where elements determine positions and/or orientation of other elements. Here it is about elements influencing other elements's shape. As an example I have chosen a plant cell tissue. Plant cells are like little balls pressing against each other - how can we model something like this? Have a look at the videos - and at my Github-account ...
Wie modelliert man ein umhülltes Virus?
Переглядів 313 місяці тому
Umhüllte Viren sind ein Beispiel für Objekte, die sich gegenseitig beeinflussen, wobei es hier um eine großes Objekt (das Virus) geht, das die Position und Orientierung vieler kleiner Objekte (der Membranproteine) bestimmt. In diesem Video zeige ich, wie man so etwas modelliert. Das Pov-Ray Skript dazu findet Ihr unter github.com/tjrfester/Modeling-Nature-Interactions, wo ich alle Skripte zu in...
Wie erzeuge ich Wolken mit der Gestalt bestimmter Objekte?
Переглядів 143 місяці тому
Wie erzeuge ich Wolken mit der Gestalt bestimmter Objekte?
Kannst du das Blatt so natürlich machen, sodass es Fotosynthese machen kann?
Nun ja, ganz so weit bin ich noch nicht - aber ich arbeite dran...
I couldn't quite understand what you were saying. What was that example from nature at the end? Some kind of fungus?
If I understand correctly it's the rhyzosphere of plants roots which contain large networks of fungus. Great topic to read up on.
Sorry for not having this stated more clearly: there are many examples, where plants have symbioses with fungi. Best-known many forest trees are associated with certain fungi. In general fungi are colonizing the roots of the plants and are exchanging nutrients (plant carbohydrates versus fungal mineral nutrients). In the case of the forest trees you can see the interaction, since there are macroscopic fruit bodies appearing specifically under specific trees. Most other plants form similar interactions without visible fungal fruit bodies and the most widespread typ is called arbuscular mycorrhiza. A small, ancient group of fungi is responsible for this interaction (Glomus sp.) and the typical morphological feature are these small trees inside the roots.
@@thomasfester6630 very cool! thank you
From the properties, it's some kind of plastic... My guess is polyethylene.
The first part of the answer is o.k.. But in the case of PE the benzyl-residues (white colour) wouldn't be there. So it's polystyrol.
@@thomasfester6630 thank you for the information 🙏
I got it!
Meme like name of the video. Waiting for top 5 molecules))0)
I like day 4 most - but day 2 and 1 are not bad as well.
Ayeeee i know that one it's glucose or sugar ! From the look of it it's beta deoxyribose . Maybe wrong tho studied about it for the first time 2 days ago 😃
Yes, it's meant to be glucose.
Physostigmine
Physostigmine has some more complex rings - I just looked it up. This one here is parathion. A strong neurotoxin for insects as well as humans.
Okey no I don't know this one ! Let's see what it is !!
No need to have a headache about this one... It's ibuprofen.
@@thomasfester6630 good one 👌
Hi Thomas Fester - We share the same very uncommon surname😀😀
My father, when he was in another town an noticed someone with that surname, he gave them a visit. (I wouldn't, of course...)
@@thomasfester6630 You are American, I am South African... Always nice to know there is somebody out there who has the same surname as you... Nice meeting you Thomas👍
@@ScreenScout-u5d Nice meeting you as well! I am German, not American, although I have been living in the US for 2 years. And I think Germany is, where your surname originated. Actually you will find a few of these names in larger cities. (There are also versions like Vester or Festerling.) I think the surname is rare in the english-speaking world, since to "to fester" has an unpleasant meaning. My Granddad, by the way, whom I never met, had the name "Richard Fester".
@@thomasfester6630 My full names are: RICHARD MARTIN GARRET FESTER. Festering might be an unpleasant meaning, but I am PROUD of my name... lol
Hmmm.... Is that chitin ?
Meant to be...
Lignin?
I still have to work on lignin. This here is meant to be cellulose.
There was a 50/50 chance 😃
Der Mensch produziert nur 5% des CO2 in der Luft aber diese 5% bringen das Gleichgewicht was die Erde regulieren konnte aus dem Gleichgewicht und dadurch verändert sich das Klima schneller als ohne die 5% CO2 des Menschen. Ein gutes Beispiel hat da mal ein anderer UA-camr gebracht solange man zwei 10 Liter Eimer immer nur hin und her befüllt passiert nix tut man aber nur 5% in dem Beispiel 0,5 Liter mehr in den 10 Liter Eimer dann läuft er über.
Penicilin
Hämoglobin
Nur Häm, das "globin" ist noch ein Proteinanteil, der noch mit dran hängt...
Steroide?
Sieht zwar ein bisschen so aus, das ist hier aber ein Anthocyan.
Cyanidin-3-Glucoside ? Had to search it up 😅 Just got started with some "real" chemistry at my school . Love the subject and love these quizes . Thank you ! have a nice day !
Eigentlich Peonidin-3-Glukosid, aber das ist nur bei Wikipedia abgeschrieben und ich müsste selbst erst recherchieren, was genau der Unterschied zwischen den beiden ist und ob man ihn bei meiner Darstellung überhaupt erkennen kann...
@@thomasfester6630 I did some , it's just a difference of a methoxy group ; they produce different shades of red and Cyanidin-3-Glucoside can appear blue under certain conditions and yes you can see it in the model . Have a nice day !
Fun fact: heme has lately gained popularity in the meat-substitute industry. To meet this high demand, bacteria are being taught to produce it (genetic modifications)
Penicillin
Correct!
Carotene
Correct as well...
It is heme found in hemoglobin
Correct!
Shortly after having produced this video I noted a major inconsistency and I had to go back to the text books to sort things out. But instead of just telling you, I thought I'm rather asking you - perhaps someone here finds out by himself. The thing is, the electron configuration presented here is only valid for sp3-hybrids. A carbon atom with normal orbitals has two electrons in the 2s-orbital and two single electrons in one p-orbital each. So a valence of 2 instead of 4. (But carbon always has a valence of 4...) O.k., we still can argue that the "normal" state for carbon is sp3-hybridization, but what about sp2-hybridized carbon, necessary for double bonds. All four electrons should stay in the 3 low-energy sp2-hybrid-orbitals, the p-orbital should be empty. How can it establish a double bond then? Any ideas? ... I'm going to tell you my text book solution in a few days...
Wie kann man nematoden vermehren ? Kann mir das bitte jemand erklären? Bin es satt die alle 2-3 Wochen kaufen zu müssen.
Wofür brauchst Du denn Nematoden? Normalerweise vermehren die sich ganz von selbst. aber es gibt ganz verschiedene Arten, die sich von ganz verschiedenen Dingen ernähren.
utube really recommend me the most random vid very nice info tho
I make games for a living, why im deep on quantum, atomic, electric and math theories lol. I just love this stuff :P
die kommentare unter der englischen version haha....ne aber echt sehr nices video, bitte mehr davon :)
Really great video. Visualizing abstract ideas like this has never been my strong suit! Thanks.
I am in favor of as much education that can possibly be produced. Keep up the good work!
It’s Always a Germans point of view weird
The german gene code has been tempered over thousands of years. Brutal inner-tribal rivalries, marauding invaders from the east and west. Empire's never sated, pricked, and prodded the tribes until 1871, when upon our unification, it'd take the world to stop us. Puny human, what do you know? What wheat do you know!?!?!?!
We had a few very brilliant guys in Germany, if that's what you mean. (Unfortunately we also had a few absolute shitfaces as well and please don't ask, whom we preferred...)
I have written a theory which unifies all forces and explains all phenomena with one law.
congrats
I believe that you believe you did.
haha publish it and win a nobel
trump is farting again
How many of these guys are there?
Even if the content of the audiovisual material is of the best quality, the audio deficiency kills it.
There are some things, which take somewhat longer... I am learning just now, how to produce sound of at least intermediate quality and I am starting with a playlist on soil physics. After that, there will be a playlist on soil chemistry and then, finally soil biology including a remake of the mycorrhiza videos....
Fix the sound please
Vielen Dank für Ihren Beitrag. Sie haben mein Abonnenten. Sie wurden mir übrigens auf der Startseite empfohlen. Ich bin gespannt was Sie mir in Zukunft noch erklären werden.
Vielen Dank! Hier stehen zunächst mal Bodenphysik, Bodenchemie und Bodenbiologie auf dem Programm - das wird eine Weile dauern... Daneben mache ich als zweiten Schwerpunkt Filme zum 3D-Modellieren. Dazu Berichte zu aktuellen Veröffentlichungen. Ach ja, zum Klimawandel will ich natürlich auch ab und zu was machen...
What a lot of people dont realize about the Schrodinger Equation for Hydrogen, is it is solved only for the time-independent case. Because we mathemattically force only spatial dependence, we get a discrete solution set of Energy eigenstates - standing wave solutions, which do not change in space with time. However, one can demonstrate the existence of intermediate states as solutions that obey a time dependence in space. These solutions produce non-stable states of traveling waves. The traveling wave leaves the system (radiation) and what remains is a standing component. One can also show that if we take the electron to be in a superposition of all standing energy states, incident travelling waves modify the the amplitude distribution of energy states. This is an old-school way of explaining how incident light can excite an electron. Indeed an incident wave can excite the electron to an intermediate combined standing+travelling state, but the result is the travelling part radiates away (compton scattering) and only leaves the standing excited state behind.
With this explanation you are leaving the area of what I can understand. (I understand what you are talking about, but not the details.) Anyway, can you give us a good internet resource here leading beyond the level of my video?
Sounds like you found the hard way, but it does make sense.
An sich ein super Video aber zwei kleine Kritikpunkte / Verbesserungsvorschläge.1)Die Sound Qualität ist echt unterdurchschnittlich, für unter 100€ bekommt man schone gute Mikrofone. 2)Vielleicht wäre es besser, sich vorab ein Skript zu schreiben und entsprechend zum Video vorlesen. Ohne die ganzen ähhhs und öhhhs, wäre das Video vermutlich 5 Minuten kürzer und angenehmer zum hören. Trotzdem upvote 👍🏻
zu 1: bei mir selbst klingt's eigentlich ganz gut, aber es hat sich schon mal jemand beschwert - eigentlich habe ich ein Mikro sogar da. Das werd ich dann mal ausprobieren. zu 2: Bisher hatte ich immer einen Text geschrieben und abgelesen. Ich dachte, so wirkt es nicht so langweilig. Das muss ich mir noch überlegen - vielleicht gelingt es mir ja auch irgendwann frei und ohne ähhhs zu sprechen...
Dem schließe ich mich an 😃
Very good simulation. Solving Schrodenger's equation for the hydrogen atom using a computer should be a mandatory exercise for all undergraduate physics students. We need to do a better job teaching important numerical techniques like Newton's method (with hessian), Runge kutta, and metropolis monte carlo.
I have to admit, I didn't study physics, but biochemistry. So I never solved any Schroedinger equation... (Maybe, in a later life, I will start with mathematics again...)
And since I asked the other comment as well, this question goes to you as well: can you give us a good internet resource leading beyond the level of my video?
You don’t need a computer to solve coulomb potential. It’s a radial wave function, leaguers polynomials, times spherical harmonics, and if you don’t know spherical harmonics…don’t bother. If you understand them, your 90% done.
@DrDeuteron that's all very well and good... until you try getting the right number. Real computation is hard. You start easy and work your way up from there.
@thomasfester6630 Yes. Numerical recipes in C++ is the best book to learn computational techniques. To learn quantum mechanics: i like Griffiths for undergrads and Sakurai for grad students. If you just want to calculate stuff it really depends on specifics. Techniques vary widely. Getting a computer to give you a number on a short timescale for anything too much more complex than hydrogen is tricky, but it is a fun challenge. Avoid programs like Mathematica for real problems it will often times give inaccurate results especially on stiff problem. Sorry about the internet part. This stuff is in thin books that are the metaphysical equivalent of 12 in thick grimoires.
I know this is some kind of science video, but I just came across it by accident and liked the drawing of the fat mouse. So yeah, Like
Nice. Die Feinstoffkonstante ist 1/137 !
First comment
I bet those influencers you listed with red dots to "global warming" are likened to one breath from a human to another; Hardly or no impact. The Earth has been doing its own breathing for billions of years and has mechanisms to deal with it. Please stop any propagandized alarmist reporting and keep your analyses on robust quantitative and qualitative, science controlled backed and reliable data.
1) This video only reports things from the publication cited. This publication has been written by 9 scientists and has been peer-reviewed by further scientists. It can hardly become more scientific than this. Reality does not disappear when you close your eyes or say "I bet...". Anyway, apparently you did not completely understand the video, since I did not talk about any "influencers". I am afraid that this reasoning here will have no effect on you and therefore... 2.) This is a channel about science, not about science history. Any comments denying long-established findings (spherical shape of earth, evolution, climate change...) without good evidence (i.e. publicly accessible, peer-reviewed scientific papers) from you or any other person will be blocked without notice in the future. So, please, don't reply. This is not to start a "discussion".
Thanks ❤ I wish to continue in this content
You are welcome! Have a look at this playlist (ua-cam.com/play/PLo2Hf81jBlP9o6cpo4UjT4jncc6sH223I.html). Pov-Ray-scripts corresponding to the videos are available in my Github-account: github.com/tjrfester/ModelingNature
Spoken words ?
Sorry, but back then my videos didn't have sound. This has changed by now ... and maybe one day I will revisit my mycorrhiza videos.
Danke für das gut gemachte Video!
Thanks for including our research in your video, I really enjoyed it. Just a minor correction - it is the juvenile stage that are very tough rather than the larvae. The larvae swim in the water and look kind of like gummy bears. Then they settle onto the sea floor and metamorphose into juveniles. This is the stage we studied and found were more resilient to heatwaves compared to corals. Thanks again! :)
Thanks for the correction!
Thank you, I've always been curious how they managed to thrive in those conditions but never looked into it & now youtube recommending me your video helps explain it! :)
Hallo Thomas, erstmal danke für das tolle video. Ich mache gerade mein abitur und beginne gerade mit einer seminararbeit in mathe und Geschichte und Gemeinschaftskunde über das Satellitennavigationssystem "Galileo". Es würde mir sehr helfen, wenn du ein video machen könntest, in dem du erklärst wie die Satellitenkonstellation funktioniert! mfg Jan
Ganz schnelle Antwort, dafür (erst mal) ohne Video... Schau bei Wikipedia nach, da gibts auch eine Animation zu der Satellitenkonfiguration. Letztendlich 3 verschiedene Orbits, alle in einer Höhe von 23 222 km über der Erdoberfläche. Jedes Orbit ist mit 8 Satelliten besetzt im Abstand von je 45 Grad. Die Orbits verlaufen zueinander im Winkel von 90 Grad. (Dazu kommen noch Reservesatelliten). Stell Dir vor, Du hättest ein Orbit um den Äquator, dann verliefe eines z.B. entlang des 0-Meridians und eines entlang des 90 Grad Längengrads. Die Orbits sind aber noch einmal zusätzlich gegen die Erdachse gedreht und verlaufen deswegen schräg zu Äquator und Längengraden. Ziel dieser etwas komplizierten Anordnung ist, dass jeder Punkt der Erdoberfläche zu jedem Zeitpunkt mehrere der Navigationssatelliten "sehen" kann. de.wikipedia.org/wiki/Galileo_(Satellitennavigation)#/media/Datei:Galileo_sat_constallation.gif
Tolles Video, gibt es davon auch Fortsetzungen?
In dieser Form nicht. Aber es gibt bei mir eine deutsche Playlist zum Thema Boden. Da ist nicht alles toll (teils schon ein paar Jahre her), aber die Mykorrhiza-Videos sind denke ich immer noch ganz gut. Zur Zeit arbeite ich eher an anderen Themen/Playlisten. Irgendwann komme ich aber zum Thema Boden zurück
The volume is way too low. None of my devices are able to make your voice audible, even on max volume.
Thanks for telling me! I've not much experience with these technical issues. It sounds good on my computer, so I thought it was o.k.. My volume is set pretty low during recording, so I can increase this. I will also try to work on this very video here, but it may take a while. Anybody knows about any standard settings for youtube videos?
Danke
I will make a video focused on differences and similarities of weather and climate models. (Within some weeks...) Short answer: Because weather and climate models predict different things. Weather models predict rain and temperature next week for a very specific place on Earth (actually almost for all places nowadays). Climate models only look at trends/tendencies. Average temperature (over several years) for a certain, very large region of our planet.
If weather models can predict accurately only a few days into the future, how can climate models claim to predict many years into the future?