What is Pure: Definition and 499 Discussions

Propulsion Universelle et Récupération d'Énergie (PURE; English: Universal Propulsion and Energy Recovery) was a motorsports engineering company founded by former British American Racing team principal Craig Pollock in 2011. It aimed to design and manufacture engines for use under the 2014 Formula One technical regulations, that mandate a switch from the current normally aspirated V8 engines to turbocharged V6 engines. The company was linked to Mecachrome, and employed former members of Renault and Peugeot's 1990s Formula One engine programmes.In July 2011, the company secured the services of Gilles Simon, formerly head of Scuderia Ferrari's engine department and the FIA technical director for powertrain development. The recruitment was controversial, with several teams and manufacturers – particularly Renault – expressing concerns that Simon's previous position with the FIA would grant him access to sensitive technical data about engine designs that could potentially be used by PURE in the development of their own engine. Simon and PURE rejected these suggestions, stating that the process of developing the 2014 engine regulations had been transparent, and that all parties involved had access to the same information so that no individual group would have an advantage. PURE used Toyota Motorsport's facilities in Cologne, Germany, whilst also maintaining a French base. In July 2012, PURE suspended its engine programme due to a lack of funding and later ceased operations.

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  1. B

    Pure, proper mixed, and improper mixed states in laymen's terms

    This is how one poster tried to explain it to me but for people who have only taken a basic physics course in college it leaves a lot wanting. "If a system is in a pure state, and you know what the pure state is, then your knowledge of the system is complete, and all uncertainty is quantum...
  2. R

    Ground force applied to wheel in pure rolling motion at contact point

    Homework Statement Suppose a wheel with radius R is resting on a non-inclined surface. A torque \tau is applied to the wheel center. In an attempt to prevent wheel from spinning, the ground applies a static friction force to the wheel at the contact point (parallel to the surface), then the...
  3. E

    Applied or Pure Math for Future Teacher?

    Hi everyone! Thank you clicking on this thread. I am a community college student seeking to transfer by the end of this upcoming spring semester. I plan to major in math; my main goal is to become a high school teacher or community college professor. Only recently did I find out that...
  4. M

    Programs Applied or pure maths major goes with Chemistry

    Hi! This is my first post in this forum, hopefully I will get some guidance :) Long story short, I am pretty much set in doing a double major in Chemistry and Mathematics. The thing is, I'm really having trouble choosing between Applied Maths and Pure Maths major. I have completed my...
  5. P

    Can an Average IQ Person Succeed in a Pure Science Career?

    I have been in state of confusion in choosing one out of these. Since I am more interested in learning the basic phenomenons and understanding why and how nature works I get distracted from the engineering course in electronics which I am currently into. Early as high-school students I loved...
  6. K

    Pure to mixed and back to pure state

    Let's say you prepare a pure state in a single electron at a time double slit experiment meaning the electron interferes with itself, then you hit the electron with a one photon at the sides (serving as environment) causing decoherence, so the double slit setup decohere and becomes mixed state...
  7. naima

    How do I express p1 |v1> + p2 |v2> for a mixture, not a pure state?

    Is there a way to write p1 |v1> + p2 |v2> if it is not a pure state but a mixture? thanks.
  8. E

    Can silence truly quiet the mind?

    Hello, How can one go about acquiring an effect of soundlessness on the brain? For example, as earplugs are to hearing capacity, the affect would be on the mind and brain.
  9. D

    Computer Science with Pure Math or Applied Math?

    Greetings Physics formus, I am a high school learner currently in my final year of schooling. I have decided that pursuing a double major in math and computer science would be a good option for my tertiary studies, as, my passion lies in the Mathematical Sciences. However, I have not decided on...
  10. 1

    What is the value of pure math (besides just being awesome?)

    So, as I have stopped focusing on physics and shifted over to math I've found myself much more motivated, happier, and relaxed. Furthermore, I am much better at it. I have not taken any math classes that have been as difficult as the basic E&M physics classes (for me). I have made such a...
  11. M

    Quick question on ensembles of pure states

    Hi folks, I just have a question concerning whether it is possible to produce an ensemble of individual electrons in pure single-particle spin states. I'm assuming it is possible, but sometimes one hears that strictly speaking all electrons are entangled with one another, which would mean...
  12. A

    Main reason why semiconductor is used and not a pure metal for detec

    Main reason why semiconductor is used and not a "pure" metal for detec Hi, I have question regarding why semiconductor is preferred in the field of radiation detection. I have read that they can be doped and their conductivity can be manipulated, but I can't see why this is not possible...
  13. S

    Where to buy a pure semiconductor?

    I do not know if this question relates to this division and would appreciate if it would be moved to proper division. I want to buy a piece of fine, pure, highly doped semiconductor with dimensions approximately: 7 cm X 7 cm X 1 cm (2 in. X 2 in. X 1/2 in.) It supposed to be just fine and...
  14. camipol89

    Are Thermal States Always Mixed States?

    Hey guys, I was reading about thermal states and now I have a doubt: is a thermal state always a mixed state with density matrix ρ=exp(-βH)/Tr(exp(-βH)), or is there also a pure thermal state? Thank you
  15. P

    Just How Hard Is It To Succeed in Pure Science?

    Hi, I love the cognitive sciences. Indeed, for the last few years, what's been motivating me to work hard in school has been almost exclusively my dream to lead a life deeply mired in the mysteries of the mind/brain. I haven't gone a waking hour in an extremely long time when I haven't thought...
  16. Z

    Engineering Engineer Studying Pure Math: Benefits and Application

    I have recently completed my first year of Eng. Physics taking the standard math courses: Calculus, Linear Algebra 1 and 2, Multivariable Calculus and Numerical Analysis. Recently though I have been self studying Rudin's "Principles of Mathematical Analysis"/Abbott on my own and I enjoy this...
  17. S

    Out of Pure Light Matter is Created

    Hi ! Here is the article I'm talking about: link tl;dr - Positrons are created from colliding photons head on . I am looking for other research that supports this direct translation of Energy --> Matter . It doesn't necesarrly have to be labrotory tested, could be theoretical as well ...
  18. P

    Should I Pursue a PhD at UCL or Seek Opportunities Elsewhere?

    I need some advice, I've just finished my 2nd year at UCL studying the Bsc in mathematics. I've so far really enjoyed my course and I'm hoping to go on to do a phd somewhere. Now, like everyone else, I want to go to the best place possible. So far, my grades are fairly good, every exam...
  19. J

    Can the Slower Cyclist Win if the Race is Short Enough?

    Homework Statement Two cyclists are in a race. One cyclist knows that he is slower, so he cheats: he removes the faster cyclist’s bike chain. The cheater starts from rest immediately with acceleration 2.5 m/s2. The faster cyclist has to take 3 seconds to replace her bike chain. She then...
  20. B

    Math Which Major Should I Choose for a Balanced Academic Career: ChE, Physics or Pure Math?

    I will become a professor regardless of what major i choose except for maybe engineering. My major will be either ChE, Pure math or Physics. I am currently taking the prequisites for all of these majors so i can change at anytime. With pure math it may be hard to compete for a position against...
  21. I

    Is Kinetic Energy Applicable to Massless Particles with Pure Charge?

    Consider a hypothetical particle with no mass (like a neutrino or photon, in that sense), but with pure charge. Consider this pure charge being accelerated in an electric field. Is there any meaning in associating kinetic energy to this charge as it accelerates to a region of lower...
  22. andyrk

    Can a sphere in pure rolling motion ever slow down?

    Homework Statement A solid sphere of radius R is given a translation velocity vo on a rough surface of coefficient of kinetic friction=coefficient of static friction=μ. After what time does the sphere begin pure rolling? Also find the the angular velocity and linear velocity of the sphere at...
  23. marcus

    PCF Pure Connection Formulation of GR now QG: Krasnov Delfino Scarinci

    http://arxiv.org/abs/1306.4035 Graviton scattering amplitudes and Pure Connection Formulation of GR Gianluca Delfino (Submitted on 17 Jun 2013) We show how the recently introduced "Pure Connection Formulation" of gravity provides a natural framework for approaching the problem of computing...
  24. S

    What's the Difference B/n Applied vs. Pure Maths?

    What's the Difference B/n Applied vs. "Pure" Maths? Hello. I'm a soon-to-be new university student and am taking this summer to learn all I can about various subjects, majors, and career opportunities. I've been reading up a little bit this week on math majors and have come across what...
  25. A

    I like pure mathematics AND physics. Help?

    I'm in my last year of school and starting a mathematics degree at a British university this Autumn. I've always liked mathematics, especially 'pure' side of mathematics. I love poofs and always enjoyed solving puzzles and brainteasers for fun. Some of my favourite topics of maths are geometry...
  26. M

    Existence of Pure Quantum States

    Are systems ever in a pure quantum mechanical state? If they are, is it possible to know the precise pure QM state? The example I am thinking of is the spin of an electron. If we measure the spin about the "z-axis" and find the result to be "up" then we say the electron is in the pure state...
  27. J

    Is Vector Calculus useful for pure math?

    Hi everyone, I have the option to take a vector calculus class at my uni but I have received conflicting opinions from various professors about this class's use in pure math (my major emphasis). I was wondering what others thought about the issue. I appreciate any advice.
  28. Barioth

    Mathematica Calculate Pure Function in Map - Mathematica

    Hi! Let's say in mathematica I declare this function t[x_,y_]:= (x'[s]+y'[s])^2 Now I can call it with L=1; t[(#^2)+L &, (#^3)+L &] if I call it this way it will remplace the # with s and evalute the derivative. Now let's say I wana do this for for every L from 1 to 10. so i got...
  29. D

    Applied Math undergrad to pure math grad school?

    The best instate college in my state for mathematics is Georgia Tech. However, it does not have a pure mathematics degree. Can I still go to grad school for pure mathematics as an applied math major? Will it prepare me for pure mathematics?
  30. B

    Solving for AC Voltmeters with a Pure Resistance and Pure Inductance

    Homework Statement a) A pure resistance and a pure inductance are connected in series across a 100 V(rms) AC line. An AC voltmeter gives the same reading when connected across either the R or the L. What does it read? (Note: Meters read rms values.) b) The magnitudes of R and L are...
  31. W

    Melting and recasting pure iron bars?

    Hello Wizards! I need to produce specially pure iron shapes for a research project. As you may know, pure iron is hard to find. Small pure iron bars are the easiest. Is it possible to melt and cast these small pure iron bars into other shapes, without the iron losing its...
  32. S

    Thin circular plate in pure bending

    Homework Statement Finding shear in terms of r My problem, is that i want t o find the shear force and if i want take a section , i need to know the reactions, but i can't find the value of reaction in terms of r I attached the problem (look at A) and my solution(in which i wasn't able to...
  33. P

    Paradox pure rolling and friction

    suppose a rigid ball roll on a rigid level with constant velocity , the friction on the contact surface decrease the forward velocity but increase angular velocity , how do you explain this paradox?
  34. P

    Pure rolling without friction?

    suppose a rigid ball have pure rolling with constant velocity on rigid level without friction , is it possible ?
  35. B

    Opinions on Engineering Physics vs. Pure Physics undergrad?

    Hello again PF, I now need to decide whether to pursue an engineering physics or pure physics degree for my undergrad, I've been accepted to both, but am unsure what would be the better fit for me. I obviously like the extra job security that an engineering degree would carry with it, but I'm...
  36. U

    What do we mean by pure gravity

    what do we mean by "pure gravity" 1-what we mean by "pure gravity" and "gravity coupled to matter"? 2- why pure gravity characterized by c=0 (c: central charge), and what is the conceptual meaning of central charge regards
  37. T

    Programs Pure Math/computer science major

    I am interested in being a cryptographer after college. I want to get a double major in pure mathematics and computer science with a minor in two foreign languages (I'm thinking french and russian). After I get my graduate degree I plan to go to graduate school to get a masters degree in...
  38. R

    What is a pure quantum state and a mixed quantum state?

    hi what is a pure quantum state and a mixed quantum state? I looked up the internet but I did not quite understand. For pure quantum state I have read that they can't be written down as a mixture of other states? are entangled states pure states?
  39. J

    Proving that an integral is a pure imaginary

    Homework Statement Show that \int_{\gamma}\ f^*(z)\ f'(z)\ dz is a pure imaginary for any piecewise smooth closed curve \gamma and any C^1 function f whose domain contains an open set containing the image of \gamma 2. The attempt at a solution I have tried to approach it from some...
  40. B

    Is Math Useless? A Troubling Belief & Its Evidence

    I was not too sure what to title this but I just skimmed through a thread with the same title so I just used this. I am not sure whether to go into math or physics. I would prefer math but how will I ever know if I "know" something. This is a troubling thought that discourages me from math. On a...
  41. C

    Math Double Major in Physics and Pure Math vs Computer Science and Pure Math

    I am currently stuck between the two choices. I have to pick my majors soon, as I am going to third year. I originally wanted to go into theoretical physics, but now I am leaning more towards theoretical Computer Science. I have always loved Physics, but I am just more at home in Computer...
  42. F

    I did theoretical physics now I will do pure maths

    Hi all, I am new to this forum =) I did physics and now I'm planning to apply for graduate studies in pure maths. I know it's relatively easier the other way (maths to physics). I never had any proof-based mathematics courses but I've been reading pure maths books (such as books of...
  43. E

    A good textbook in Differential Equations for pure mathematicians

    Hi I am a physics major and I am trying to double major in math,I will be taking a differential equations course for pure math students this semester. I need advice on a good textbook in Differential Equations for pure mathematicians that will build up a great intuition for proofs and will have...
  44. 3

    Math Pure or Applied maths with stats

    Hi all, This post will be long, but I hope in giving more relevant information, the replies will be more helpful. Apologies for the length, and thanks for reading, given now. I'll state the question here though to avoid you having to search for it: Does it make any real difference whether...
  45. S

    Schools Do you know Good schools for Pure math and/or physics theory? .

    Do you know Good undergrad schools for Pure math and/or physics theory? Please Help. Hunting for colleges, I'm a definite pure math or theoretical physics major. To give you an idea of my academic standing: MIT would be a stretch, U Penn is a mid reach, Brown is a low reach, Northeastern is a...
  46. T

    Why do sine waves define pure frequency?

    Like the title says, I'm curious why sine waves are often referred to as "natural" or "pure" oscillations. Why not some other oscillating function? As an example of the type of idea I'm referring to, the wikipedia "Sine Wave" article says: To me, the argument that it sounds pure because...
  47. O

    Do photons have momentum without mass?

    Is it correct to say that as photons have no mass they are pure energy and have no mass equivalent according to E=mc^2? In a particle collision involving photons, conservation of momentum can not be used as photons are mass-less. Is that also correct? A proton in a linear accelerator can...
  48. B

    Programs Can a Pure Math undergrad get into an Applied Math PhD program?

    I want to get my undergraduate in Pure math (I've taken and will take some additional CS courses). My question is, would I still be a competitive candidate for a PhD program in computational biology? (mathematical modelling of biological/behavioral/social systems) or should I really get my...
  49. S

    Route from physics to pure maths?

    Assuming I finish my study with a BSc or MSc, what are your ideas on the best way to move into more pure maths? I was thinking that getting employed by a company and working out a way for them to pay for it would be good idea, but even so which courses are probably the best? Would I have to...
  50. S

    Transmission by pure scatterer layer

    Beer´s law does not apply if there is any scattering. In a pure absorber, if 1 layer absorbs 50 % of incident light and scatters 0 % then 2 consecutive layers transmit 25 % of light and absorb 75 %. And so on exponentially. 9 layers of pure absorbers would transmit 0,195% and absorb 99,8 %...
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