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.

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  1. L

    How Does Moving the Summation Block Affect the Equation in Control Systems?

    Hi there, I am struggling to understand how moving the summation (with H3) to before G1 will cause H3 to have to be divided by G1. I tried writing down how the equations would work to make sense of it but I still can't see how it works out. Please can someone explain this to me? Thanks, Laura...
  2. T

    Am I rewriting this differential correctly?

    Homework Statement I have a differential equation that I need to solve numerically by writing a program. x0, y0, x_dot0, y_dot0, α are all given Hello, I have the following differential equation: http://puu.sh/d78KC/107bd6c71f.png I want to rewrite it so I can solve it numerically by writing...
  3. T

    Matter Alignment: Magnatism Effects on Salt Water Flow

    Could a field of a certain.type of magnatism effect a giving area of salt water as to.either align or dispurse the water to more freely flow among them or slide between them .like a horizon of water molecules
  4. E

    Algebraic Manipulation of Equations

    Homework Statement I have two equations. The first is for all of the forces on a hanging mass from a pulley. The second is for the sum of the torques about the pulley from which the mass hangs. I simply have to combine the equations to find the acceleration of the object. I have attempted every...
  5. S

    Laser focal point manipulation

    Is it possible with modern optic technologies to achieve the following effect: A relatively thing laser beam passes 30-50 cm and after that completely defocuses? It should defocus under very broad angle. What I exactly mean is creation of a 2D screenless images just in a thin air with help of a...
  6. T

    [Limit] Algebraic Manipulation of Rational Function

    My https://www.amazon.com/dp/0073532320/?tag=pfamazon01-20 gives a rule of thumb to divide by the highest power in the denominator for the following problem to demonstrate a slant (oblique) asymptote: \lim_{x\to\infty} \frac{4x^3+5}{-6x^2-7x} = \lim_{x\to\infty}...
  7. J

    Partial Derivative Manipulation for Physical Chemistry Homework problem

    Homework Statement Given the functions Q(v,w) and R(v,w) [/B] K = v(dQ/dv)r and L = v(dQ/dv)w Show that (1/v)K = (1/v)L + (dQ/dw)v (dW/dv)r I have the problem attached if for clarity of the information. Homework Equations I assume everything is given in the problem. The Attempt at...
  8. T

    Algebraic manipulation of sum of squares.

    Hiya. I got to an interesting bit in a calculus book, but as usual I'm stumped by a (probably simple) algebraic step. The author goes from: (ds)^2=(dx)^2+(dy)^2 to: ds=\sqrt{1+\left(\frac{dy}{dx}\right)^2}dx I understand moving the square root across, but I don't understand how the...
  9. R

    Symbolic manipulation inside integral

    I'm an undergrad who has just completed the standard calculus sequence (1, 2, and multivariable). I've done well in the courses, however, things like the following, which is a derivation of kinetic energy, still confuse me: Taken from here. I want to understand the symbolic...
  10. S

    Manipulation within the Einstein Tensor in Einstein field equations

    Hello everybody. I was recently brainstorming ways to make the Einstein field equations a little easier to solve (as opposed to having to write out that monstrosity of equations that I started on some time ago) and I got an interesting idea in my mind. Here, we have the field equations...
  11. gfd43tg

    Cell Array manipulation (matlab)

    Homework Statement Write a line of MATLAB code that uses the cell array A to generate the string 'Cal Golden Bears'Homework Equations The Attempt at a Solution A = {'Cal', 'Golden', 'Bears', [5 7], {[1 2 3 4]}} A = 'Cal' 'Golden' 'Bears' [1x2 double] {1x1 cell} The...
  12. gfd43tg

    What is the purpose of max(A,[],1)?

    Homework Statement Homework Equations The Attempt at a Solution A = [2.1, 4.2, 6.7; 8.3, 5.3, 5.4] A = 2.1000 4.2000 6.7000 8.3000 5.3000 5.4000 [mVal, I] = max(A,[],1) mVal = 8.3000 5.3000 6.7000I = 2 2 1 I don't understand what max(A,[],1) is...
  13. J

    Algebraic manipulation of equation

    Hi, I was wondering whether anyone could tell me how to deal with this manipulation, which I am unable to see. a_1=\frac{F}{(-m_1\omega^2+K_1+K_3)-K_3a_2} a_2= \frac{K_3a_1}{(-m_2\omega^2 +K_2+K_3)} Starting with a_1...
  14. R

    How much energy is needed to manipulate the Higgs field?

    Hi everyone, So I've been wondering how much energy does it takes to impart some kind of effect on the higgs field. I've been trying to look for the energy the LHC generates and compare it to the actual amount of energy that it takes for the higgs field to be affected, but since this is all new...
  15. Albert1

    MHB Manipulation of square root function

    $\dfrac {\sqrt {3-3x}+\sqrt {x+6}}{\sqrt {1-4x}+\sqrt {2x+8}}=\dfrac {\sqrt {3-3x}-\sqrt {x+6}}{\sqrt {1-4x}-\sqrt {2x+8}}$ please find :$x$
  16. X

    Calculating Exhausted Mass Velocity in Rocket Thrust Manipulation

    Hey everyone, so I'm just wondering if you guys can articulate the term "velocity of lost mass" from the rocket. After a few massaging on the equations(derivatives and integrals stuff) i found that to manipulate the thrust, one must manipulate the burn rate AND the "velocity of loss mass". all i...
  17. Hepth

    Advanced : HQET Derivative manipulation

    This is a semi-advanced question for anyone with HQET experience. When you expand out the Lagrangian, as well as the wave functions, you get things like the equation of motion that are expressed in terms of the covariant derivative and the heavy quark velocity : \def\lts#1{\kern+0.1em...
  18. G

    Manipulation of Electromagnetic fields using curls clarification

    Homework Statement Question 1. General Plane Waves. We may represent a general electromagnetic plane wave by (real part of the complex exponentials) E=E_{0}*e^(i*k*r-iwt) B=B_{0}*e^(i*k*r-iwt) Show that Faraday's Law becomes iwB0=-ik x Eo Homework Equations dB/dt=- curl of E The...
  19. S

    MHB Use algebraic manipulation to prove the distributivity property

    Use algebraic manipulation to prove that x+yz=(x+y)(x+z) Note that this is the distributive rule, So I have: (x + y)(x + z) = xx + xz + xy + zy = x + xz + xy + zy = x(1 + z + y) zy =x * 1 + (z + y)(zy) = x + ((zzy +...
  20. F

    Finding Phase Shift in Trigonometric Equations

    Hello, Probably a simple problem, but I am not able to figure it out. a \cos (\epsilon) - b \sin (\epsilon) = c in-phase part a \sin (\epsilon) - b \cos (\epsilon) = d out-of-phase part In order to find the phase shift, the in-phase term has to be divided by the out-of-phase...
  21. Lebombo

    Algebraic Manipulation within Integration by Parts problem

    Homework Statement I'm doing an integration by parts problem. After setting up [∫udv = uv - ∫vdu], I come across this situation. How is this algebraic manipulation accomplished? From: \int\frac{x^{3}}{1+x^{2}}dx To: \int x - \frac{x}{1+x^{2}}dx
  22. J

    Solving ODE for $\sigma$: Transformation and Manipulation?

    Hi all, I have an ODE of the form \frac{d^{3}\psi}{d\xi^{3}}-A\left(\psi+\xi\frac{d\psi}{d\xi}\right)=0, where \psi=C_{1}U(\xi)+C_{2}V(\xi). Is there any transformation or inventive manipulation I can use here to obtain an ODE for \sigma=U(\xi)+V(\xi)? As this is the quantity I would...
  23. V

    Can Natural Magnets Effectively Manipulate Plasma in a Vacuum?

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  24. S

    MHB Use Algebraic Manipulation Part 2

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  25. S

    MHB Use Algebraic Manipulation...

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  26. D

    MHB Vector Manipulation: Writing Cross Prod.

    Is it possible to write \(\lvert\dot{\mathbf{r}}\rvert\lvert\ddot{\mathbf{r}} - \dot{\mathbf{r}}\cdot\ddot{\mathbf{r}}\rvert\) as \(\lvert\dot{\mathbf{r}}\rvert\lvert\dot{\mathbf{r}}\times\ddot{\mathbf{r}}\rvert\)? I want to show $$...
  27. S

    Sorting Nuclear Reactors: Exploring Particle Manipulation

    Is there any manipulation of nuclear particle to sort out the nuclear reactor?
  28. M

    Simple manipulation of x^2 - 1 = 0, getting x=0 as a solution.

    This isn't homework or anything, just something I tried and it doesn't seem to be consistent. I randomly just multiplied x^2 - 1 = 0 by x instead of factoring and solving: x^3 - x = 0. Then I factored out an x and got x(x^2 - 1) = 0. Then I divided by x^2 - 1 and got x = 0 which isn't a...
  29. T

    Quantum mechanics operator manipulation

    Homework Statement consider operator defined as \hat{O_A} = \hat{A} -<\hat{A}> show that (ΔA)^2=<\hat{O_A}^2> Homework Equations (ΔA)^2=<\hat{A}^2>-<\hat{A}>^2 The Attempt at a Solution (ΔA)^2=<\hat{A}^2>-<\hat{A}>^2 = <\hat{A}^2> - (\hat{A} -\hat{O_A})^2 = <\hat{A}^2> -...
  30. Z

    Metric tensor - index manipulation

    hello, Do I have the right to perform the following : gjo,i + g0i,j = (gj0 δij + g0i ),j = (2 g0i ),j Thank you, Clear skies,
  31. B

    Manipulation of Arbitrary Constants in Differential Equations

    Homework Statement yy''+(y')2 = 0 Homework Equations yv(dv/dy)+v2=0 The Attempt at a Solution Variable separable when solving for the first step the result is: - ln |v| = ln |y| + C1 Now, I've looked at the remainder of the solution with a few other sources and the cause of...
  32. Pattonias

    Need Some guidance in G-code manipulation.

    I am working on a project that will require me to program a cnc like system that can adjust its code based on readings that it receives from sensors as it is running its program. Could anyone give me some pointers on where to start looking for this kind of software? I'm finding my weakness...
  33. A

    Vector Manipulation (Orthogonal and Parallel Vectors)

    Consider the vectors a=<2,4,-3> and b=<4,-5,6>. Determine vectors v and w such that a=v+w and v is parallel to b while w is orthogonal to b.The dot product of two orthogonal vectors is zero and the cross product of two parallel vectors is zero. A parallel vector is a multiple of the chosen...
  34. D

    MHB Solving Vector Manipulation Problem with $\lambda$, $\mathbf{b}$, $\mathbf{c}$

    The unknown vector $\mathbf{v}$ satisfies $\mathbf{b}\cdot\mathbf{v} = \lambda$ and $\mathbf{b}\times\mathbf{v} = \mathbf{c}$, where $\lambda$, $\mathbf{b}$, and $\mathbf{c}$ are fixed and known. Find $\mathbf{v}$ in terms of $\lambda$, $\mathbf{b}$, and $\mathbf{c}$. I tried writing stuff out...
  35. B

    Algebraic/Matrix Manipulation (linear algebra)

    Homework Statement I have attached the relevant question as an image (for sake of ease) Homework Equations The Attempt at a Solution Also attached, in blue. Thanks a lot for any help at all!
  36. B

    Matrix manipulation (inverse, lin. alg.)

    Homework Statement Let A\inM_{n}(\Re) a matrix verifying A^{3}-A^{2}-I_{n}=0 a) Show that A is inversible and calculate it b) Show that the solution X\subsetM_{n}(\Re) of the equation A^{k}(A-I_{n})X=I_{n} has a unique solution. The Attempt at a Solution I'm having...
  37. O

    MCQ about intensity of sound waves (formula manipulation)

    Homework Statement Homework Equations The equation that is already given + (maybe) I is proportional to A2f2. The Attempt at a Solution I took the square root of 8, 8 being the Amplitude and I being proportional to the square of A. (I make the constant of proportionality 1)...
  38. J

    Manipulation of partial differential operators.

    Homework Statement Given that u(x,y) and y(x,z) are both continuous, differentiable functions show that (\frac{\partial u}{\partial z})x=(\frac{\partial u}{\partial y})x(\frac{\partial y}{\partial z})x Homework Equations Only equations given above The Attempt at a Solution I...
  39. N

    Equation, algebra manipulation that I dont get? help

    how does 1/2kx2 = 1/2mv2 + 1/2kx2 become x = (m/k)v2 + x2 ??
  40. D

    Trignometric manipulation problem

    Homework Statement If A+B+C=pi where pi=180 and cotA+cotB+cotC=√3 show that A=B=C Homework Equations cot(A+B)= cotAcotB-1/cotA+cotB The Attempt at a Solution I have tried to solve it by using both A+B+C=pi and cotA+cotB+cotC=√3. I also know that we have manipulate the whole...
  41. L

    Matrix Manipulation Homework: Inverting AB/BD for Epsilon & K

    Homework Statement This is the equation for stresses and strains in a multilayered lamina. The actual purpose is irrelevant as I just am unsure what exactly the equation is saying (is it A * B * B^-1 * D^-1) I am unfamiliar with this matrix syntax.Homework Equations Below is a link to an image...
  42. K

    Manipulation of V=IR to produce a directly proportional graph.

    Homework Statement Hello, in physics the other day we sat a test which asked up to measure current and resistance of different resistors in a circuit. After collecting the data and plotting the graph for current vs resistance and coming up with a curve indicating an exponential relationship...
  43. RabbitWho

    Types of experimental manipulation in Social Psychology

    The only information my textbook gives me is this: We classify experimental manipulations into three broad types, depending on whether they involve variations in the physical, social, or instructional features of the experimental context. Social manipulations are usually dependent on...
  44. H

    Question about homework manipulation

    I'm taking mechanics and my professor said that the upcoming test will be very similar to the homework problems assigned. But he said we should know how to work the problems backwards. So in the homework he gives us a and b and we have to solve for c and he's saying that on the test he will...
  45. T

    Vector notation / manipulation question

    Homework Statement Xuv is a 4x4 tensor and Vu is a vector. Vu = (-1, 2, 0, -2) (i.e. it is a 1x4 vector). Find the quantities Vu Vu and Vu Xuv Homework Equations Given above The Attempt at a Solution I'm having trouble finding Vu. Initially I thought that it should be the...
  46. M

    Mathematical Induction - Algebra Manipulation

    Homework Statement I am working on a mathematical induction problem, where I need to prove: (1 - (-7) ^ (k + 2)) / 4Homework Equations (1 - (-7) ^ (k + 1)) / 4 + 2(-7) ^ (k + 1) The Attempt at a Solution So I just need to add the two items in section two above. Now I know I need a common...
  47. A

    Comp Sci Java-String manipulation (first word to last)

    Write a program that will read a line of text as input and then display the line with the first word moved to the end of the line. For example, a possible sample interaction with the user might be. "Enter a line of text. No punctuation please. java is the language I have rephrased that line...
  48. A

    Proving Linear Manipulation to Reduce to GCD of Two Numbers

    Given two numbers m and n, I need to prove that if a linearly manipulate them I can reduce them to their gcd. example:- 5 and 3. 3+3-5=1 which is their gcd. For that I assumed m as gx and n as gy where g is their gcd and x&y are co-prime. So if I am able to prove that linear combination of...
  49. D

    Probability - factorial algebraic manipulation

    I saw this in my book and I'm having a difficult time figuring out how this formula was manipulated algebraically to equal the other side. I know that it works because I've used it several times but I can't show that it is true. \frac{n(n-1)...(n-r+1)}{r!} = \frac {n!}{(n-r)!r!} One of...
  50. H

    MHB Manipulation of negative square root of a negative term/#

    Suppose I have to solve for y: x\leq 1 (x - 1)^{2} = y So I know that (x - 1) will always be 0 or a negative, therefore I must take the negative square root of (x - 1): -\sqrt{(x - 1)^{2}} = -\sqrt{y} Am I to understand that this is the same as: -1 \cdot \sqrt{(x - 1)^{2}} = -1 \cdot...
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