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Kartazion

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Everything posted by Kartazion

  1. The use of seeds is very controlled. Unfortunately for agricultural producer in Europe, the reuse of seeds is prohibited. You must to repurchase the seeds. Seed laws that criminalise farmers: resistance and fightback Genetic?
  2. This is the role of the compiler. Early computer software was written in assembly language corresponding to processor instructions, and early compilers were written directly in assembly language. In general, the source language is "higher level" than the target language, that is, it presents a high-level of abstraction. An interpreted language as JavaScript, Python, Perl, etc, is a programming language which are generally interpreted, without compiling a program but instead read and executed by some other program. AFAIN not really. The flags is an additional processor informations. It allows you to set and know the state of the processor at any time thanks to the different bits that compose it. This register thus makes it possible to have at any time the state resulting from an instruction having been executed by the processor. FLAGS register - Wikipedia
  3. Partial Wikipedia summary: The possibility of Standard Model particles moving at faster-than-light speeds can be modeled using Lorentz invariance violating terms called the Standard-Model Extension (SME). In addition, the Standard Model is a generalization of quantum electrodynamics (QED) whose negative mass is already part of the theory. Neutrinos experience Lorentz-violating oscillations can travel faster than light at high energies. But the question lies in the negative Mass-Square of neutrinos https://arxiv.org/abs/hep-ph/0009291. As joigus says the fields with imaginary mass coined the term "tachyon", Gerald Feinberg studied Lorentz invariant quantum fields with imaginary mass. Because the group velocity for such a field is superluminal, naively it appears that its excitations propagate faster than light. However, it was quickly understood that the superluminal group velocity does not correspond to the speed of propagation of any localized excitation (like a particle). Instead, the negative mass represents an instability to tachyon condensation, and all excitations of the field propagate subluminally and are consistent with causality. Despite having no faster-than-light propagation, such fields are referred to simply as "tachyons" in many sources.
  4. Hello. A tachyon is a hypothetical particle that always travels faster than light. But nothing goes faster than light. So either it's doomed to fail or you can perhaps explain this difference in speed increased? Thanks.
  5. I found on the Internet the solution to be able to send an email after each connection in SSH. It is easily possible to insert whatever you want from your sh executable file in shell. Create the executable file my_file.sh in the directory of your choice (for example /etc/my_file.sh). Do not forget to give the executable permissions with: chmod +x my_file.sh #!/bin/sh SENDER="your@email.com" EMAIL_FROM="your@sever.com" SUBJECT="SSH Login Notify" MESSAGE="You have a new SSH connection Username: ${PAM_USER} IP Address: ${PAM_RHOST}" if [ ${PAM_TYPE} = "open_session" ]; then echo "${MESSAGE}" | mail -n -r "${EMAIL_FROM}" -s "${SUBJECT}" "${SENDER}" fi exit 0 Add the following line to indicate the file to be executed to /etc/pam.d/sshd: session optional pam_exec.so /etc/my_file.sh That's it. PS: For information sshd (OpenSSH Daemon) is the daemon program and listens for connections from clients. It can be configured using command-line options or a configuration file by default /etc/ssh/sshd_config
  6. The Fock space is defined as the Hilbert space obtained by the direct sum of the tensor products of the Hilbert spaces for a particle. Hilbert's concept of space extends the methods of linear algebra by generalizing the notions of Euclidean space. It's a question, but isn't Euclidean space a projection of the reality and a description of the object in a physical space?
  7. I found Fock space. I don't know the scope and actual use of Fock space in current physics. The intervention of the second quantification becomes inevitable insofar as it partially responds to the OP with the coherent states. Partial Wikipedia summary: The Fock space is an algebraic construction used in quantum mechanics to construct the quantum states space of a variable or unknown number of identical particles from a single particle Hilbert space H. Informally, a Fock space is the sum of a set of Hilbert spaces representing particle(s). If the identical particles are bosons, the n-particle states are vectors in a symmetrized tensor product of n single-particle Hilbert spaces H. If the identical particles are fermions, the n-particle states are vectors in an antisymmetrized tensor product of n single-particle Hilbert spaces H. A Fock state or number state is a quantum state that is an element of a Fock space with a well-defined number of particles (or quanta). Fock states play an important role in the second quantization formulation of quantum mechanics. In quantum mechanics, a coherent state is a quantum state of a quantum harmonic oscillator whose behavior resembles that of a classical harmonic oscillator. The theory describing the coherent states involves the operator annihilation and creation of the second quantization. From the definition of the operator displacement, one can derive that a coherent state corresponds to the superposition of states of Fock. Creation and annihilation operators are mathematical operators that have widespread applications in quantum mechanics, notably in the study of quantum harmonic oscillators and many-particle systems. In many subfields of physics and chemistry, the use of these operators instead of wavefunctions is known as second quantization.
  8. The ability to think through the mind, therefore, makes it possible to undertake engineering.
  9. I'll see if there is a solution in the second quantization. The second quantization or canonical quantization, is a method of quantization of fields which consists, starting from a classical field such as the electromagnetic field, to consider it as a physical system and to replace the classical quantities (E, B) describing the state of the field by a quantum state and quantum physics observables. We naturally come to the conclusion that the energy of the field is quantized, each quantum representing a particle. wikipedia fr Thank you swansont
  10. Apparently this proprotion is only valid for the photon, the photon being the expression of an electromagnetic wave at given wavelengths. The probability density of the presence of photons is exactly proportional to the square of the amplitude of the electromagnetic wave and the square of the amplitude of the electromagnetic wave is equal to the energy density of the electromagnetic wave (see Poynting vector). Lorentz long ago represented the electron as a small sphere charged with electricity, and of such dimensions that the inertia of the surrounding Coulomb field was equal to the mass of the electron. This sounded reasonable in Lorentz's day. The theorists of the time were already busy calculating the mass of the electron from the theory of the electromagnetic field. The energy of the radiation came from the kinetic energy lost by the particle under the effect of its own electromagnetic forces. The dressed state approach is it valid for an electron? Indeed I only saw one relation with the photon.
  11. Ok. But we agree that what field theory does best is localize the particle in relation to its fields.
  12. Hello. Is there an equation or an approach in view of a unification between the wave function (amplitude of probability of presence, and volume density of probability of presence of the particle (represented by the square of its norm)), and the electromagnetic field?
  13. Auxiliary components of the particle like EM wave. There is an equation or a unification formalism of the wave function with the electromagnetic field? Finally I created a new thread related to the Unification between the Probability Density of the particle and the Energy Density of an electromagnetic wave
  14. This appears to be a 'Zone of localized disturbances of the fields of action'. This corresponds to the particle as well as its constituent annex components. My question is now whether there is an equation or a unification formalism of the wave function with the electromagnetic field? Thanks again. PS: The proportionality between probability density for a harmonic oscillator and the volume density of electromagnetic energy, must be linked.
  15. I see meaningless posts. You talk about of development of cell therapy-based strategies for the treatment of liver failures and of inherited metabolic diseases has become a necessity because of the limitations of orthotopic liver transplantation, including shortage of donor livers, and ask about the light after posting a resident evil link. ??? Ask a clear and relevant question from your feed, ie the OP. When liver cells are attacked for a long time, they die and are replaced by fibrous tissue: this is “fibrosis”. "Cirrhosis" is the terminal phase of fibrosis. What is the relationship between photophobia and the liver? Make a technical effort with your posts and in relation to your questions.
  16. Electromagnetis. One of the four fundamental interactions . In classical electromagnetic Maxwell showed that they were only two aspects of the same set of phenomena. For the moment, quantum electrodynamics, the aim of which is to reconcile electromagnetism with quantum mechanics, is too complicated because it uses a relativistic Lagrangian formalism. Moreover in this theory, the electric charges interact by exchange of virtual photons. But does QFT also support other fields such as strong interaction or gravity into the theory? Thanks studio.
  17. Cortistatins - Wikipedia I found it via google image.
  18. In QFT the behavior of electromagnetic fields is described either conventionally by Maxwell's equations or more generally by quantum electrodynamics. To put it simply, the photon corresponds to an excitation by the electric and magnetic field in the same way as an electron. Am I right? Thanks.
  19. I think the most rational explanation is given by @zapatos.
  20. Hello. The slits should be at the top and the bottom of the pipe serves as a bowl. On another side the drain must be sloping. About 1 cm per meter. The accumulation of the water downstream means that by its level will cause water to pass through the slits. The gravel below the pipe is probably because if it touch the ground, it will plug and accumulate this mud in the drain. Be careful during your installation because it is said that for specific condition in agricultural spreading, the slits of the drain must be downwards!
  21. What is the name of this region determined by the probability of wave function and defined by their respective field? We already know that the particle is found in this region. Would this standing wave would have the same name of this region spoken previously? I admit that the example of the photon is not the simplest in our example. The cavity quantum electromagnetics is drifting into a utility of quantum computer and optical quantum communication. I even understand in itself that no photon is emitted, but simply the use of an oscillation of the electron at the level of their energy between two intermediate n shells.
  22. A photon trappe in an optical resonator coupled with two-level atoms.
  23. I understand that the photon trapped in the cavity is detected by its electric and magnetic field.
  24. I imagine it must be difficult to represent a massless particle like the photon with this type of field. How does QFT interpret the photon, and if the theory allows it?
  25. Apparently, and as indicated, it concerns the imortality of certain cells in humans. Understanding this and the methods used requires several years of study.
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