What is Local: Definition and 519 Discussions

Local history is the study of history in a geographically local context and it often concentrates on the local community. It incorporates cultural and social aspects of history. Local history is not merely national history writ small but a study of past events in a given geographical but one that is based on a wide variety of documentary evidence and placed in a comparative context that is both regional and national. Historic plaques are one form of documentation of significant occurrences in the past and oral histories are another.
Local history is often documented by local historical societies or groups that form to preserve a local historic building or other historic site. Many works of local history are compiled by amateur historians working independently or archivists employed by various organizations. An important aspect of local history is the publication and cataloguing of documents preserved in local or national records which relate to particular areas.
In a number of countries a broader concept of local lore is known, which is a comprehensive study of everything pertaining to a certain locality: history, ethnography, geography, natural history, etc.

View More On Wikipedia.org
Recent contents Top users
  1. binbagsss

    A QHE ' the effective action should be a local functional'

    ' Finally, if we care only about long distances, the effective action should be a local functional, meaning that we can write is as ##S_{eff}[A]=\int d^d x...## ' Where does this come from and what does it mean? This isn't at all familiar with me, and I don't recall ever seeing anything...
  2. Orodruin

    A Is 'Local Flatness' the Right Term for Describing Spacetime?

    I see many posts by several different people referring to spacetime being "locally flat" with the intended meaning of being locally indistinguishable from Minkowski space, i.e., being able to rewrite the metric on orthonormal form and not being able to measure curvature on some local scale. I do...
  3. Viopia

    B Does Local Gravity Override Dark Matter in Galactic Rotation?

    Hi. Could the local effects of gravity between nearby stars at the edge of a galaxy cause these stars to rotate around the centre of the galaxy more quickly than predicted if the prediction is based upon individual stars only. This effect would be similar to the way the Earth "drags" the Moon...
  4. phyzguy

    A Part of the Hubble discrepancy can be explained by local underdensity

    Interesting paper on the arXiv today. The authors claim that there is observational evidence that we live in a region with slightly lower density than the universe average, just by chance. Taking this into account can explain as much as 5.5% of the discrepancy in the Hubble constant between...
  5. OldBeginnings

    I Isn't the local no-hidden-variable theory inconsistent with standard QM?

    Consider a pair of entangled particles described by a local theory without hidden variables. Because there are no hidden variables, the results of an experiment on one particle of the entangled pair must be perfectly random. Due to locality, the particles also have no way of coordinating the...
  6. user366312

    What is Static, Dynamic, Transient, and Persistent Local Resource in the discussion of Object Server and Middleware?

    What I understand is, I have written something like this myself. What is a Static Proxy and a Dynamic Proxy then? Also, What is a Transient Proxy and a Persistent Proxy?
  7. Robin04

    Probability - Girl visiting local pubs

    What I can't understand from the problem is that whether she stays at a certain pub for M hours, or she visits more pubs and goes home after M hours. If it's the first case, then I think the answer is ##\frac{M}{24}\frac{1}{N}##. This problem is posted as a harder one so I suppose it has to...
  8. A

    Finding the Local Max/Min of f(x,y) on C

    Hi everyone, I'm struggling with this problem: Let ##f(x,y) = \begin{cases} (x-y)\ln(y-x) & \text{if } y>x \\ 0 & \text{if } y\leq x \end{cases}## and let ##C=\{(x,y)\in \mathbb{R}^2|x^2+y^2=1\}## Then proof that ##max_Cf=1/e## and ##min_Cf=-(\ln2)/\sqrt2## My solution: I used Lagrange...
  9. Wi_N

    I'm looking for a local minimum point that doesn't show up when....

    Homework Statement I set the derivative to 0. i get 1 real root a max point and 2 imaginary. How can i find that local min? what techniques are available?
  10. F

    Homework - A galaxy in the local universe

    Homework Statement I have the following questions as homeworks and I would like to get help. Here's some informations given to help us to answer : Photometry : U=11.60 B=11.16 V=10.20 Redshift : z= 0.00780 Central velocity dispersion : ##\sigma_{v}## = 210 km/s Introduction : The...
  11. T

    Image of a f with a local minima at all points is countable.

    Homework Statement Let ##f:\Bbb{R} \to \Bbb{R}## be a function such that ##f## has a local minimum for all ##x \in \Bbb{R}## (This means that for each ##x \in \Bbb{R}## there is an ##\epsilon \gt 0## where if ##\vert x-t\vert \lt \epsilon## then ##f(x) \leq f(t)##.). Then the image of ##f## is...
  12. m4r35n357

    GCC warning: function may return address of local variable

    Yes I've already looked on SO! None of the answers contain the word "may". My story is that I am passing in references to global variables, modifying them, and returning them in array literals. I suppose it must complaining about the array literals (c99) rather than the variables themselves...
  13. FallenApple

    I Local Sampling vs Global Sampling

    So from what I understand from my readings in Shankar's QM book, in the preface, that Newton's Laws give a particle some local sampling of the gravitational field around it and then decides where to move next based on the current step and that the sequential sum of all the path segments(...
  14. T

    Schools Returning to my local college this fall

    I've decided to return to my local community college this coming fall. I'm going to major in Physics with a concentration/intention to go into engineering with it. There aren't that many information technology/computer science/entry level helpdesk job postings where I live. On Indeed.com...
  15. T

    Job Skills Interview soon at local phone company this week

    Hi, I have an interview at one of my local phone companies for a tech, internet helpdesk 1 position (something that I'm qualified for) (I'm trying to get out of dishwashing ASAP for obvious reasons). There's paid training both in classroom and hands on. It's a full time position. I'm attending...
  16. DrChinese

    I Big Bell Test Collaboration: Challenging Local Realism with Human Choices

    Not sure if this reference has been posted yet, but I just saw it come through and thought I'd share. This is the "Big Bell Test Collaboration" using measurement choices provided by persons (as opposed to computer generated "random" choices). (The authors are a virtual who's who in the world...
  17. C

    I Local meaning of the equivalence principle

    [Moderator's note: Spun off from another thread due to topic change.] Can I say that "being at rest in a uniform gravitational field is locally equivalent to accelerating in flat spacetime, free falling in a uniform gravitational field is locally equivalent to nonacceleration in flat spacetime ?"
  18. Bandersnatch

    I Are there any local effects of Einstein-de Sitter expansion?

    The question is whether or not expansion in flat, matter-only universes (no lambda) has any effect whatsoever - no matter how negligible - on dynamics of small-scale systems. Context: It's a variation on the 'is Brooklyn expanding?' type of questions. My understanding has always been that...
  19. Demystifier

    A Is there a local interpretation of Reeh-Schlieder theorem?

    Non-philosophically inclined experts in relativistic QFT often insist that QFT is a local theory. They are not impressed much by arguments that quantum theory is non-local because such arguments typically rest on philosophical notions such as ontology, reality, hidden variables, or the...
  20. C

    MHB Local Error: Euler/Crank-Nicholson

    Hi All, For the attached question, I think that substituting theta = 0, I get the Euler method back. If I substitute theta = 1/2, I get the Crank-Nicholson (Modified Euler) method back. In terms of accuracy, I know this means that Crank-Nicholson is the more accurate method. I am mostly...
  21. Ibix

    I Transforming to Local Inertial Coordinates

    I've been playing around a bit with the Kerr orbit program I wrote, and have been thinking about ways to set the initial conditions. One thing I'd like to be able to do is specify a launch from some event in terms that would be convenient for an observer at that event with some given...
  22. J

    B Tides and Local G: Investigating the Relationship Through Long-Term Observations

    It occurs to me that it might be possible to determine a local value of G by observing the tides over a long-ish period. Tide height might be distributed as a normal curve, but it might have a measurable deviance. I wouldn't expect a left/right offset of the X coordinate based on G(local) , but...
  23. K

    B Preserving local realism in the EPR experiment

    What is wrong with the idea that the spooky correlation in the EPR experiment is simply the result of the initial difference in rotation between the two polarizers in this experiment? So if you rotate one of the polarizers relative to the other polarizer, that initial act of rotation is what...
  24. |Glitch|

    I Action Dynamics of the Local Supercluster

    The interactive model can be found at: Action Dynamics of the Local Supercluster Interactive Model Source: Action Dynamics of the Local Supercluster - The Astrophysical Journal, Volume 850, Number 2, December 2017 (free preprint)
  25. karush

    MHB 243.14.7.5 Find all local extreme values

    $\tiny{243.14.7.5}$ $\textsf{Find all local extreme values of the given function and identify each}$ $\textsf{as a local maximum,local minimum,or saddlepoint}$ $\textit{$f$ has a} \textbf{ saddle point } \textit{at $(a,b)$ if}$ \begin{align*} \displaystyle f_{xx}f_{yy}-fxy^2&\ge 0 \text{ at }...
  26. karush

    MHB 243.14.7.4 Find all local extreme values

    $\tiny{243.14.7.4}$ Find all local extreme values of the given function and identify each as a local maximum,local minimum,or saddlepoint \begin{align*} \displaystyle f_4(x,y)&=x^2+14x+y^2-12y+5\\ \end{align*} saw this in the section $\text{if we substitute the values} \\$ $\text{$f_xCa, b) =...
  27. C

    A What are local and non-local operators in QM?

    In Hartree-Fock method, I saw the Fock operator has two integrals: Coulomb integral and exchange integral. One can define two operator. "The exchange operator is no local operator" why? Whats de diference: local and no local operator? And why do the operators have singularities? thanks
  28. K

    What is the Proof for Local Minimum and Maximum at First Derivative Equals Zero?

    Homework Statement Homework Equations At local minimum or maximum the first derivative equals zero The Attempt at a Solution a) $$f'=2x-\frac{a}{x^2},~~2\cdot 2-\frac{a}{4}=0~\rightarrow a=16$$ Near 0 from the left a/x gets large negative values, smaller than for a=16. that's my proof for...
  29. B

    Local Formulation of Continuity

    Homework Statement Let ##X## and ##Y## be topological spaces, and let ##\{U_i\}## be a collection of open sets in ##X##. If ##X = \bigcup U_i## and ##f|_{U_i}## is continuous, then ##f : X \to Y## continuous. Homework EquationsThe Attempt at a Solution Let ##x \in X##, and let ##V \subseteq...
  30. T

    I Are Local Lorentz Transformations Possible with Varying ##\vec{x}##?

    We are always taught in books that a Lorentz transformation is possible as long as the Lorentz matrices ##\Lambda## in ##\vec{x}{\ }' = \Lambda \vec{x}## are not function of ##\vec{x}##. The reason for this is obvious, since in this way the relation ##t^2 - x^2 - y^2 - z^2 = t'^2 - x'^2 - y'^2...
  31. J

    A Breaking of a local symmetry is impossible, so what about global symmetry....

    Breaking of a local symmetry is impossible. It is often said that therefore the role of the Higgs mechanism in the standard model is a different one. Namely, Once a gauge is fixed, however, to remove the redundant degrees of freedom, the remaining (discrete!) global symmetry may undergo...
  32. U

    I Local, non-realistic description of the EPR-Bohm experiment

    I propose for your consideration the following version of this experiment: We have a source, S that produce pairs of spin 1/2 entangled particles and two detectors, A and B that measure the spin of those particles. The detectors are oriented on the same direction, say X and they are fixed. As...
  33. morrobay

    B Local Hidden Variable Model That Equals QM Predictions?

    With E a,b = ( dλ ( a,a' b,b' λ) Suppose λ depends independently/locally on detector setting choices at A and B. For example suppose there are 360 detector settings at A and 360 at B , corresponding to 360 particle/detector interactions/outcomes at A = ± 1 and also at B = ± 1. Then as θ =...
  34. F

    I What happens to local clock when many observers are moving wrt each other?

    I looked around the net and couldn't find an answer to this particular setup: Suppose I am at rest with two friends (friend A and friend B). We all have a clock. All three clocks are synchronized and tick at the same rate. Now one of my two friends (friend A) starts his rocket engine and leave...
  35. S

    "local" vs "long distance" phone service?

    Does the distinction between "local" versus "long distance" phone service still have any basis in the equipment used to implement the service? Are "local" calls actually transmitted only on the networks and equipment owned by the local phone company?
  36. S

    I Do Bell experiments disprove local realism?

    Why or why not?
  37. electr

    Estimate the local heat transfer flux

    Homework Statement Liquid ammonia is heated as it flows at a mean velocity of 2 m s–1 through a circular pipe. The pipe, which has an internal diameter of 75 mm, is at a uniform temperature of 27°C, and the ammonia at a section 1.2 m from the inlet to the pipe has a temperature of –23°C. Use...
  38. S

    Assumption of local thermodynamic equilibrium in a fluid

    Moving fluids are generally in a state of non-equilibrium. However, in fluid dynamics, people generally assume a state of local thermodynamic equilibrium and argue that in such a condition, equilibrium thermodynamic concepts such as pressure, temperature, entropy, internal energy etc. can be...
  39. edguy99

    I Modeling EPR - Local or Non-Local

    One way to talk about it precisely is in your program (great program btw). When running the program, you clearly demonstrate a difference in correlation when only "local" vs. "non-Local" variables are used. In order to help understand your program, I have modified some defaults on the program...
  40. G

    Mathematical formulation of local non-realism

    Hi. Bell formulated local realism as follows: The probability of a coincidence between separated measurements of particles with correlated (e.g. identical or opposite) orientation properties can be written as $$P(a,b)=\int{d\lambda\cdot \rho(\lambda)\cdot p_A(a,\lambda)\cdot...
  41. M

    MHB Analyzing Local Behavior at x→0+ of y'+xy=1/x^3

    Asked to find first three terms in the local behavior as x→0+of the solutions of y′+xy=1/x^3 This was taken by bender and orszag book Working : I tried to use method of dominance but later realized that we can find using the series expansion. But I am not sure how to proceed. Please advise...
  42. N

    I Interpretation of QM that psiontic, local, and has collapse?

    Is there any interpretation of QM that is Psi-ontic, local, and has wave function collapse?
  43. unwillingly ignorant

    B Is Everything outside the local group moving away from us?

    This is a simple question but i keep finding conflicting answers and don't understand scientific and mathamatical language well enough to consult reliable data.. 'Cause I'm a dunce. So, is EVERYTHING outside the local group leaving us, or are some things in the virgo supercluster contracting...
  44. resurgance2001

    I Variations in the local value of Hubble constant

    I have been reading in various sources that the directly measured value of Ho is high than the global value inferred by precise measurements of the CMB. The local value seems to be around 73 km/s/Mpc where as the global value inferred, assuming a flat Lamda CDM model is about 67 km/s/Mpc...
  45. G

    I Difference between "realistic" and "predetermined"

    Hi. A while ago, I apparently had a wrong idea about the meaning of realism. I stood corrected: I'm still struggling with those subtleties. Would following formulation be more appropriate: "Realism means, that every observable ##x## is attributed a probability distribution ##p_P(x)## that...
  46. F

    I Difference between global and local gauge symmetries

    The mantra in theoretical physics is that global gauge transformations are physical symmetries of a theory, whereas local gauge transformations are simply redundancies (representing redundant degrees of freedom (dof)) of a theory. My question is, what distinguishes them (other than being...
  47. M

    Proving local injectivity of curve

    Homework Statement Let γ : I → Rn be a regular smooth curve. Show that the map γ is locally injective, that is for all t0 ∈ I there is some ε > 0 so that γ is injective when restricted to (t0 − ε , t0 + ε ) ∩ I. Homework Equations The Attempt at a Solution [/B] So I know a function (or a...
  48. N

    A Is loop quantum gravity a non local or local QFT?

    Can it be either?
  49. E

    Calculating Local Heat Flux in a Pipe: Is h = Nu*(k/x) the Correct Formula?

    I am a little unsure how to get started with a homework question. Essentially, I have to calculate the local heat flux at a distance 1.2m (x) along a pipe. I have the fluid's properties and have calculated the Reynolds number, for which I've determined the flow to be turbulent and therefore do...
  50. N

    B Local teleportation using classical entanglement

    http://onlinelibrary.wiley.com/doi/10.1002/lpor.201500252/abstract https://arxiv.org/pdf/1509.06217v2.pdf "...it has been implicitly assumed that this scheme is of inherently nonlocal nature, and therefore exclusive to quantum systems. Here, we experimentally demonstrate that the concept of...
Back
Top