# What is Manipulation: Definition and 191 Discussions

Object manipulation is a form of dexterity play or performance in which one or more people physically interact with one or more objects. Many object manipulation skills are recognised circus skills. Other object manipulation skills are linked to sport, magic, and everyday objects or practices. Many object manipulation skills use special props made for that purpose: examples include the varied circus props such as balls, clubs, hoops, rings, poi, staff, and devil sticks; magic props such as cards and coins; sports equipment such as nunchaku and footballs. Any other object can also be used for manipulation skills. Object manipulation with ordinary items may be considered to be object manipulation when the object is used out of its socially acknowledged context and used differently from its original purpose.
Object manipulators may also be practitioners of fire performance, which is essentially object manipulation where specially designed props are soaked in fuel and lit on fire.

View More On Wikipedia.org
1. ### I Trig Manipulations I'm Not Getting

Hi all, I am starting with the following equation: ##2\cot\left(\frac{\theta}{2}\right) = \cot\left(\frac{k_{1}}{2}\right) - \cot\left(\frac{k_{2}}{2}\right)## with the following definitions: ##k_{1} = \frac{K}{2} + ik, k_{2} = \frac{K}{2}-ik, \theta = \pi(I_{2}-I_{1}) + iNk##, where...
2. ### Radio Wave Induced Firing Of Neurons Through Ca2+ Channel Manipulation

I’ve read that the Ca2+ channels in neurons can be manipulated through the use of certain radio wave frequencies. And the resulting internal/external charge differential will cause the neurons to fire. Does anyone have any more insight into that?
3. ### Need To Do Fancy Windows File Manipulation

I have about one hundred folders. Each folder has both .jpg and .mp4 files. I want to delete all the .jpgs but not the .mp4s. I don't want to do each folder by hand. Does anyone know the Windows/DOS command that will do this. Just moving the files depending on file type is enough.
4. ### Exploring Audio Signal Manipulation with Circuits

I'm just playing around with circuitry, working with manipulation of Audio Signals in active circuits(My guitar, going to build an internal preamplifier). I've been trying to find an answer on this all day with no luck. As eager as I am to see what the effect would be it would be nice to know...
5. ### I Manipulation of 2nd, 3rd & 4th order tensor using Index notation

If I have an equation, let's say, $$\mathbf{A} = \mathbf{B} + \mathbf{C}^{Transpose} \cdot \left( \mathbf{D}^{-1} \mathbf{C} \right),$$ 1.) How would I write using index notation? Here A is a 4th rank tensor B is a 4th rank tensor C is a 3rd rank tensor D is a 2nd rank tensor I wrote it as...

42. ### MHB Simplification and manipulation

Hi All, I've been stuck on a problem and after much simplification, it has been reduced to the following: Is it possible to factor out the (a^2 - b^2) bit. For example, if a = b, the equation would not be valid. Is there any way to factor it out using manipulation? Best wishes, 'nap
43. ### Integration algabriac manipulation problem

Hello there, I was wondering if someone might be able to help me out with some intermediate steps please. I can't see how $$f_{tt} =-\int_{r_0}^0 \left(\frac{2Gm_0}{r} - \frac{2Gm_0}{r_0}\right)^{-\frac{1}{2}} dr$$ becomes f_{tt} =-...
44. ### Manipulating λmax * T formula to relate T1 to ∆T

Homework Statement In an experiment to study a black body radiator, the intensity of emitted radiation is measured as a function of the wavelength of the radiation. At a particular temperature T1 the wavelength of the highest intensity radiation is determined to be λ1. When the temperature is...
45. ### Function manipulation involving trigonometry

I'm trying to integrate a function in a classical physics problem but when I apply the limits it gave undefined results. Hence, I looked up that particular part of the solution and I did not fathom the function manipulation. It states that if x≤b in the following expression...
46. ### Ricci Tensor/Scalar Contraction Manipulation Q&A

So my textbook definitions of the ricci tensor and ricci scalar are: ##R_{ab}=R_{acbd}g^{cd}## - I note the contraction is over the 2nd and 4th index. and the 1st and 3rd. ##R=R_{ab}g^{ab}## Now, I'm trying to show that...
47. ### Physics Lab / Equation manipulation

1. T^2 = (4 pi^2 m)/k * d^2 + (4 pi^2 I)/k y = m * x + c Information (4 pi^2 m)/k = m (gradient) (4 pi^2 I)/k = c (the y intercept ) A graph of T^2 vs d^2 was plotted. (^2) means squared Find constants k and I How is this done since the m in the...
48. ### Best software for tensor manipulation?

Do you know any good software for manipulating tensors: varying Lagrangians, checking gauge and supersymmetry transformations, etc. ? One that could deal with anti-commuting variables would be good too. One that also supplied group constants for SU(n) etc. would also be useful. I was also...
49. ### Solving Tensor Index Manipulation Confusion

I am making mess of the following expression.. i have following expression ## \frac{\partial{g}}{\partial{g_{\mu j}}} *g_{\nu j}=g \delta^{\mu} _{\nu} ## then I have sum over j only in the above expression. But above expression is nonzero only when ##{\mu}## is equal to ##\nu##. So we have ##...
50. ### Integrals and gamma functions manipulation

Homework Statement I am working through some maths to deepen my understanding of a topic we have learned about. However I am not sure what the author has done and I have copied below the chunk I am stuck on. I would be extremely grateful if someone could just briefly explain what is going on...