Methods and tools for explaining things. Scientific method. Types of scientific evidence. Les idées froides. Régimes de sens et logique des sciences - Interactions socio-sémiotiques et avancées scientifiques. Texte intégral Note de bas de page 1 : Steven Weinberg, Les trois premières minutes de l’Univers, Paris, Seuil, 1978, p. 179. « Plus nous comprenons le monde, plus il nous semble dépourvu de signification »1.
Cette citation du prix Nobel de physique Steven Weinberg résume à elle seule les deux principaux motifs qui sous-tendent l’activité scientifique depuis 2500 ans. Il y est bien sûr d’emblée question de découvrir et de rendre intelligible en les expliquant le quoi et le comment des choses et des êtres dont le monde qui nous entoure est peuplé. Note de bas de page 2 : Eric Landowski, « Le papillon tête-de-Janus », Actes Sémiotiques, 110, 2007. Pourtant, c’est pour donner à l’existence humaine et à son destin un autre sens que celui auquel le réduisait la croyance en l’intervention divine dans les affaires du monde que les premiers balbutiements intuitifs de la pensée rationnelle ont vu le jour, tel l’atomisme de Leucitte, de Démocrite, d’Epicure et de Lucrèce.
Note de bas de page 3 : J. Reccom Magazine. The World's Most Unanswered Science Questions. Infinity Imagined. Tabletop Whale. Sixty Symbols - Physics and Astronomy videos. An amateur's outlook on computation and mathematics.
Formules Physique. LE THÉATRE de la PHYSIQUE.
Scientific Notation. Scientific Notation (also called Standard Form in Britain) is a special way of writing numbers: It makes it easy to use big and small values.
Fundamental Frequency and Harmonics. Previously in Lesson 4, it was mentioned that when an object is forced into resonance vibrations at one of its natural frequencies, it vibrates in a manner such that a standing wave pattern is formed within the object.
Whether it is a guitar sting, a Chladni plate, or the air column enclosed within a trombone, the vibrating medium vibrates in such a way that a standing wave pattern results. Logique. The Logic Lab: simulating simple circuits of logic gates. Logic Puzzles. Iris AI - Your Science Assistant. Making Sense Of Complexity – Sarah Firth – Medium. Chaos Theory: A Brief Introduction. What exactly is chaos? The name "chaos theory" comes from the fact that the systems that the theory describes are apparently disordered, but chaos theory is really about finding the underlying order in apparently random data.
When was chaos first discovered? The first true experimenter in chaos was a meteorologist, named Edward Lorenz. In 1960, he was working on the problem of weather prediction. He had a computer set up, with a set of twelve equations to model the weather. Figure 1: Lorenz's experiment: the difference between the starting values of these curves is only .000127. When he came back an hour later, the sequence had evolved differently.
MIT Physicist Proposes New "Meaning of Life" MIT physicist Jeremy England claims that life may not be so mysterious after all, despite the fact it is apparently derived from non-living matter.
In a new paper, England explains how simple physical laws make complex life more likely than not. In other words, it would be more surprising to find no life in the universe than a buzzing place like planet Earth. What does all matter—rocks, plants, animals, and humans—have in common? We all absorb and dissipate energy. While a rock absorbs a small amount of energy before releasing what it doesn't use back into the universe, life takes in more energy and releases less.
[S]imple physical laws make complex life more likely than not. Physics. WAVE the theory of everything ! SVP Universal Cosmology - Part 1 of 17. What’s Really Inside A Proton? At a fundamental level, the Universe is composed of indivisible particles.
Physique quantique. Mécanique Quantique - Physiciens. Interpretations of quantum mechanics. An interpretation of quantum mechanics is a set of statements which attempt to explain how quantum mechanics informs our understanding of nature.
Although quantum mechanics has held up to rigorous and thorough experimental testing, many of these experiments are open to different interpretations. There exist a number of contending schools of thought, differing over whether quantum mechanics can be understood to be deterministic, which elements of quantum mechanics can be considered "real", and other matters.
This question is of special interest to philosophers of physics, as physicists continue to show a strong interest in the subject. They usually consider an interpretation of quantum mechanics as an interpretation of the mathematical formalism of quantum mechanics, specifying the physical meaning of the mathematical entities of the theory. History of interpretations Main quantum mechanics interpreters. Einstien's dice and Schopenhauer's cat. More Than One Reality Exists (in Quantum Physics) Can two versions of reality exist at the same time?
Physicists say they can — at the quantum level, that is. Researchers recently conducted experiments to answer a decades-old theoretical physics question about dueling realities. This tricky thought experiment proposed that two individuals observing the same photon could arrive at different conclusions about that photon's state — and yet both of their observations would be correct.
For the first time, scientists have replicated conditions described in the thought experiment. Their results, published Feb. 13 in the preprint journal arXiv, confirmed that even when observers described different states in the same photon, the two conflicting realities could both be true. Un esperimento indica che non esiste una realtà oggettiva. Ma cosa significa per la meccanica quantistica?
What Is Nothing? A Mind-Bending Debate about the Universe Moderated by Neil deGrasse Tyson. By Maria Popova “You can’t assert an answer just because it’s not something else.”
Isaac Asimov — sage of science, champion of creativity in education, visionary of the future, lover of libraries, Muppet friend — endures as one of the most visionary scientific minds in modern history. Every year, the Hayden Planetarium at the American Museum of Natural History, of which Asimov had been a tenacious supporter, hosts the Isaac Asimov Memorial Debate, inviting some of the greatest minds of our time to discuss monumental unanswered questions at the frontier of science. The 2013 installment explored the existence of nothing in a mind-bending conversation between science journalist Jim Holt, who has previously pondered why the world exists, theoretical physicist Lawrence Krauss, who has explored the science of “something” and “nothing,” Princeton astrophysics professor J. The Trouble with Theories of Everything - Nautilus - Pocket.
Whenever you say anything about your daily life, a scale is implied.
Try it out. “I’m too busy” only works for an assumed time scale: today, for example, or this week. Not this century or this nanosecond. “Taxes are onerous” only makes sense for a certain income range. The Official String Theory Web Site. Complex Adaptive Systems. Feedback loops: How nature gets its rhythms - Anje-Margriet Neutel. The music in this lesson was composed by Ross Allchurch. Feedback What is feedback? It is a process that is the result of mutual causal interaction: X affects Y and Y affects X. The mutual causal interaction creates a circuit of effects, so that any change in X, causing a change in Y, in turn causes another change in X, and so on – a feedback loop. Feedbacks are either positive or negative.
Feedbacks affect the way every single variable, every population in an ecosystem for example, responds to both internal and external perturbations. Helter Skelter: Negli aeroporti americani conosceranno il teorema di Bayes? Study suggests humans are only capable of having five people in their closest circle. (Phys.org)—A trio of researchers affiliated with the University of Oxford in England and Aalto University School of Science in Finland has conducted a study of human behavior and has found evidence backing up a prior theory that suggests humans have different layers that make up their social circle with different numbers of people in them. In their paper uploaded to the preprint server, arXiv, they describe their study which involved analyzing cell phone records to count calls, what they found and that they believe it means for us a group.
One of the researchers, Robin Dunbar, was part of a team that back in the 1990's studied the correlation between brain size in primates and the number of individuals in their social groups. They found that the bigger the brain, the more members of their groups. More recently, he and colleagues have conducted some experiments that suggest that humans have layers or groups of contacts, with the closet layers having fewer people, and the farthest, more.
Scientific method. Post-Modern Science: The Illusion of Consciousness Sees Through Itself We have always struggled with the limits to how human language can express our thoughts about reality. But post-modern science dismisses the struggle as futile: We did not evolve to perceive reality. That conviction is changing cosmology dramatically. We know almost nothing about the human consciousness but naturalism must treat it as evolved from unconscious elements. Frank Wilczek on Beauty, Physics, and Philosophy. We recognize beauty when we see it, right? Michelangelo’s David, Machu Picchu, an ocean sunrise. Could we say the same about the cosmos itself? Algorithmicity, Islamic Art, and Virtual Philosophy: Thoughts on Laura Marks’ ‘Enfoldment and Infinity’ One of the most incredible works of architecture I’ve ever seen: The Hall of the Two Sisters in the Alhambra, Granada. The dome is composed of a multitude of tiny, pixel-like cells known as muquarna.
“The universe is not dualistic, but folded, so spirit is separated from matter only by degree” – Laura Marks, Enfoldment and Infinity: An Islamic Genealogy of New Media Art (2010, p. 271). Fractal patterns in nature and art are aesthetically pleasing and stress-reducing. Humans are visual creatures. Objects we call “beautiful” or “aesthetic” are a crucial part of our humanity. Even the oldest known examples of rock and cave art served aesthetic rather than utilitarian roles. Although aesthetics is often regarded as an ill-defined vague quality, research groups like mine are using sophisticated techniques to quantify it – and its impact on the observer. We’re finding that aesthetic images can induce staggering changes to the body, including radical reductions in the observer’s stress levels.
Job stress alone is estimated to cost American businesses many billions of dollars annually, so studying aesthetics holds a huge potential benefit to society. Life as Art: The Legacy of Lynn Margulis. A New Theory of the Universe: an article by Robert Lanza about biocentrism building on quantum physics by putting life into the equation. Scientific Method: Relationships Among Scientific Paradigms. To see the full map of relationships among scientific paradigms, click here or on the image below. Il dizionario della complessità. Empirical Zeal. The Philosophy of Science Directory. Edge - All Conversations. Structure of scientific revolutions. Rationality. Rational Wiki - Main Page.
TalkOrigins Archive: Exploring the Creation/Evolution Controversy. Falsifiability of evolution. A Newly Drawn Tree of Life Reminds Us to Question What We Know About the History of Earth. This evolution graphic will make you feel tiny - Business Insider. Skeptic. Scepticisme philosophique. The Skeptic's Dictionary. Home - The Skeptics' Guide to the Universe. Skeptic » Home » The Skeptics Society & Skeptic magazine.
Skepticality - The Official Podcast of The Skeptics Society & Skeptic Magazine. Jerry Coyne on Taboos in Science, Skepticism, and the Incompatibility of Faith and Fact. Skeptical Software Tools. Science, croyance et idées reçues. Scepticisme et esprit critique en Santé, médecine, paranormal, science, pseudoscience, technologie et impostures en tous genres. Bad Science. Periodic Table of Irrational Nonsense. Natural Sciences. Smallest organisms. Largest organisms. List of longest-living organisms. Il portale dell'evoluzione. Red Queen Hypothesis - The Evolutionary Arms Race. Richard Dawkins. Why Life Does Not Really Exist. ANIMAUX. The tardigrade genome has been sequenced, and it has the most foreign DNA of any animal.
How to Find and Care for a Pet Tardigrade ( Water Bear ) Il Candirù (Vandellia cirrhosa), il peggior incubo degli Indios - Microbiologia Italia. L'énigme des nuées d'étourneaux. Altre preistorie. The Hundredth Monkey Revisited. Why do chimpanzees throw stones at trees? Mysterious Chimpanzee Behavior May Be Evidence of "Sacred" Rituals. Il Cortocircuito Logico dell’Antispecismo. Paleontologist Visits Creationist Museum, Bursts Into Tears. Tree of Life - Taxonomy. 15 Giant Monsters That Lived Alongside Humans. Science. Science. Science with Out of this World Info. Sciences. Sciences. Science. Free Science Books and Journals. Ologies with Alie Ward. 125 Great Science Videos: From Astronomy to Physics & Psychology. Astronomic.