What is Component: Definition and 567 Discussions

Component-based software engineering (CBSE), also called components-based development (CBD), is a branch of software engineering that emphasizes the separation of concerns with respect to the wide-ranging functionality available throughout a given software system. It is a reuse-based approach to defining, implementing and composing loosely coupled independent components into systems. This practice aims to bring about an equally wide-ranging degree of benefits in both the short-term and the long-term for the software itself and for organizations that sponsor such software.
Software engineering practitioners regard components as part of the starting platform for service-orientation. Components play this role, for example, in web services, and more recently, in service-oriented architectures (SOA), whereby a component is converted by the web service into a service and subsequently inherits further characteristics beyond that of an ordinary component.
Components can produce or consume events and can be used for event-driven architectures (EDA).

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  1. C

    Calculating Average Acceleration: Rebounding Hockey Puck Example

    A hockey puck rebounds from a board as shown in Figure 16. The puck is in contact with the board for 2.5ms. Determine the average acceleration of the puck over the interval. http://www.dumpyourphoto.com/files7/202298/medium/w1ifLZ3kRT.jpg The answer given in the textbook is 7.3 × 103 m/s2...
  2. F

    Vectors using the component method

    Use the component method to add the vectors and shown in the figure. The length of is 2.55 m and the angle θ = 31.5°. Express the resultant + in unit-vector notation. The answer should be in the form of ...i + ...j so far i have done 3*cos(31.5) = 2.56 so this is for ...i but I am...
  3. F

    Vectors using the component method

    Use the component method to add the vectors and shown in the figure. The length of is 2.55 m and the angle θ = 31.5°. Express the resultant + in unit-vector notation. The answer should be in the form of ...i + ...j so far i have done 3*cos(31.5) = 2.56 so this is for ...i but I...
  4. K

    Vector Displacement Magnitude Calculation

    Homework Statement After driving 80.0 km west, a car turns southwest and proceeds another 30.0 km. What is the displacement of the car from the point of origin (magnitude only)? Homework Equations The Attempt at a Solution I tried drawing this out. I am given no angles, does this mean i...
  5. A

    MATLAB MatLab - Raising each component of a matrix

    I am in great need of the syntax that tells MatLab to raise the component of a vector to any power. I also need to know the syntax that outputs the time to perform the calculation. Thank you
  6. J

    Unknown component identification

    http://www.adafruit.com/blog/2012/05/25/handy-arduino-r3-pinout-diagram/ What is the component just below the USB connector, and to the left of the SOT transistor? I've seen something like this on a few other boards, but I can never place exactly what it is.
  7. J

    What is the correct component force along the axis of the hook?

    I worked out the attached problem. I was just looking for a logic check on my work. The problem asks you to find the component force along the axis of the hook. Thanks
  8. P

    Adding vectors with the component method

    Hi! I know this is pretty basic... I'm teaching myself from a textbook, and I got a different answer from the book...It doesn't have the problem worked out, just the answer. I just need to figure out what mistake I made. Homework Statement Find the resultant of the following forces: (a) 30N...
  9. P

    Independent Component Analysis vs Single Spectrum Analysis

    Homework Statement Hello, I have implemented single spectrum analysis and independent component analysis against a time series (in this case the euro foreign exchange) as a smoothing indicator. The ssa algorithm I purchased from: Caterpillar-SSA - http://www.gistatgroup.com/cat/programs.html...
  10. S

    Components of Darkness: What Forms the Dark?

    Hi friends. Many a times i have gazed "What is darkness?" Can anyone tell the components of a darkness? In other words, what forms the darkness? Is that the absence of light? Absence of Particles? Help me out guys
  11. W

    Find tetrad component from metric

    How can find components of tetrads from metric ? i know the relation between tetrads and metric g_{μ \nu}=η_{ab}e^{a}_{μ}e^{b}_{\nu} where e^{b}_{\nu} are component of tetrads , in the case of Schwarzschild that metric is diagonal , it is a easy problem but what about non-diagonal metric like...
  12. R

    Hello. I've a question about transistor IRF-740. This component has a

    Hello. I've a question about transistor IRF-740. This component has a Zener diode connected between drain and source. Has this diode a function of limiting over voltage ?
  13. N

    Find the component of the Force along AC

    Homework Statement The 350-lb force is to be broken into components along the lines AB and AC. 2. The component along AC is most nearly 1. 175.0 lb 2. 186.2 lb 3. 202 lb 4. 225 lb 5. 239 lb 6. 268 lb 7. 294 lb 8. 303 lb 9. 404 lb 10. 457 lb I have attached an image of the...
  14. J

    Find the Y component of the Center of Mass

    Homework Statement Find the Y component of the Center of Mass http://img607.imageshack.us/img607/7122/83370796.png Homework Equations ∫(r*dm)/M The Attempt at a Solution I keep coming up with (2/3)B but i know since that there is more mass near the origin axis, it should be...
  15. W

    Find the x and y component of an electric field

    Homework Statement http://i33.photobucket.com/albums/d86/warnexus/physicsfigure.jpg Homework Equations electric force = (field strength)(elementary charge) electric force = k(e^2)/(distance^2)The Attempt at a Solution the goal of the problem is to find the x and y component of an electric...
  16. G

    Circuit Diagrams in Component Data Sheets

    What software is used by manufacturers to produce the thousands of data sheets for all of the products that they make? Specifically, the circuit diagrams which look very crisp, like they were made in a vector format. I assume that each manufacturer has some proprietary software that they use to...
  17. R

    Replace Component in Old Oscilloscope: Solutions Wanted

    Hello. I have to replace a component at the input of an old oscilloscope. The reference is unfoundable ( 41R105 ? ) in fact it is 2 NFET transistors in the same package (TO-39). I guess Ft is >= 1 GHz. I'm just looking for a component of the same kind (of course not same reference) that iI can...
  18. S

    Velocities with a resulting horizontal component

    Homework Statement Romeo is chucking pebbles gently up to Juliet's window, and he wants the pebbles to hit the window with a horizontal component of velocity. He is standing at the edge of a rose garden 8m below her window and 9m from the base of the wall. How fast are the pebbles going when...
  19. W

    Bending Stresses on Male Component in Tapered/Interference Fits

    I'm looking for some help understanding bending stresses and stress concentrations in Morse Tapers (or any press-fit or interference-fit geometry). Specifically, I'm trying to understand the influence of a slot (and orientation of the slot) in the female component of a Morse Taper on the...
  20. B

    Measurning the partial pressure of a component of a solution in equilibrium

    Homework Statement Suppose I have two substances in a solution, each forming an equilibrium with its corresponding vapor phase, and thus having its own partial pressure. How can I measure this partial pressure of one of the components, given the pressure of each component in its pure form...
  21. Q

    What is the name of this component (of a chainsaw engine)? And what material is it?

    Just wondering what the name of the component as a whole is? And what is it made of? Also, if you could tell me the name of all the constituent parts, that would be great...
  22. W

    Any hints on how to do I find the x component?

    Homework Statement Homework Equations Work = F xcomponent * delta x The Attempt at a Solution The force is given as a resultant since it does not give a specificed x or y component. Any hints on how to do I find the x component?
  23. B

    Compound circuit voltage drop along parallel component

    Homework Statement http://imageshack.us/a/img197/3519/circuith.png Equivalent Resistance of circuit = 17.31 Ω Homework Equations V = I * R The Attempt at a Solution Total voltage of the circuit, if I'm doing this correctly should be: E = (3.00 A) * (17.31 Ω) = 51.93 V...
  24. S

    Exploring the Inertial and Rest Mass of Quarks and Gluons in Hadrons

    Quarks are imprisoned in hadrons, and have large binding and kinetic energies at all times. Ditto about gluons. How can inertial mass of quarks inside hadrons be measured? Also, how is it proven that gluons are massless? What effects would happen if gluons had rest mass, as much as up to a...
  25. S

    Helping me to understand the difference between pd of a source and a component

    Hi, I've recently been reading up on circuit electricity and as the title states have found difficulty understanding the difference between pd of a source and a component from the textbooks I've been reading. So far I am to believe that the pd of a circuit is directly proportional to its...
  26. shounakbhatta

    Stress energy tensor's Component

    Hello, Considering stress energy tensor as: [T00,T01,T02,T03 T10,T12,T13,T14 T20,T21,T22,T24 T30,T31,T32,T33] Is T00=Energy density? Is T10,T20,T30 = momentum density? t02=energy flux? t11,t22,t33=pressure? which is the momentum flux? where is the shear stress? Thanks, --...
  27. J

    In 4-momentum, why is E the 4th component?

    Assuming that c is a "conversion factor" to convert between space and time, Then, in 4-vector, we have x_1 through x_3, and t, where, x/c = t x/c = t, (where t = time, c= lightspeed, x = spatial dimension) If we do what we did to space to get time, to momentum, p/c = m*v/c = m (x/t) / c =...
  28. M

    Why Can Tangential Acceleration Vector's Scalar Component Not Be Negative?

    we already know that the scalar component of the Centripetal ( Radial ) Acceleration vector is always negative because it's ALWAYS directed to the opposite direction of its unit vector ( toward the center of the circle ) , and this is satisfying to me and to the formula . however , when it...
  29. A

    Question about finding a component of the electric field

    Let's say I have the electric potential as a function of x, y, and z: V(x,y,z) Now I want to find the x component of the electric field along the x-axis: Ex(x,0,0) I could take the derivative of the potential wrt x and then plug in zero for y and z. However if I was to plug in zero...
  30. S

    Finding the y- component of velocity

    Homework Statement A boat moves at an angle of 60° to a horizontal line. The x component of the boat's velocity is 5 m/s. What is its y component of velocity? Question 25 answers 10 m/s 10 √3 m/s 5 √3 m/s 5 m/s Homework Equations How exactly do I find the...
  31. G

    Do gravity waves imply repulsive force component?

    If you consider empty space case (energy-momentum tensor is zero), the curvature of space is Ricci-flat but the Riemann tensor is not necessarily zero, which allows for gravity waves in empty space. It's not difficult to see that the waves would have to be transverse (analogous to EM waves)...
  32. R

    Eigenvectors with at least one positive component

    I am wondering if there is a systematic way to fix the phase of complex eigenvectors. For example e^{i \theta}(1,\omega,\omega^2) where e^{i \theta} is an arbitrary phase and \omega and \omega^2 are the cube roots of unity, is an eigenvector of the cyclic matrix \left(\begin{matrix}0&...
  33. R

    Expectation value of z component of angular momentum for a particle on a ring

    I have to find the expectation value of the z component of the angular momentum for a particle on a ring and the expectation value of the z component of the angular momentum squared for a particle on a ring. The wavefunction is e^((± imx)) I've determined that the expectation value for the...
  34. W

    3-D vector into its component form

    **refer to attached picture** I'm having some trouble understanding what is happening here. I'm trying to write this vector into its component form so I can solve an equilibrium problem. But I don't understand how the book is splitting this vector. I only drew the vector that I am having trouble...
  35. A

    Why Does the X Component Disagree in Problem B?

    Pls help with number "B". The X component doesn't agree! Ignore the data entered in the fields for X,Y(incorrect). I later figured Y component is "-1", but have no idea why X didn't work out. Thx a lot!
  36. T

    Magnitude of Perpendicular Component.

    Homework Statement Determine the components of F that act along rod AC and perpendicular to it. Point B is locateda distance f along the rod from end C http://imgur.com/iGJkN Given: F = 600 N a = 4 m b = 6 m c = 4 m d = 3 m e = 4 m f = 3 m I have no clue where to start. please help! Homework...
  37. W

    What is the Velocity Vector of an Object After Undergoing Acceleration?

    Homework Statement An object is moving in the x direction at 1.3 m/s when it undergoes an acceleration. Acceleration vector equals .52 j hat meter per second every second. Find its velocity vector after 4.4 seconds. I am told to find x and y component of the velocity vector. Homework...
  38. S

    Amplitude modulation frequency component

    Hello Everyone! About Amplitude Modulation, Usually it is seen in the book or web that (e.g. http://www.ni.com/white-paper/3002/en ) '''' The message signal can be represented by m(t) = Mb cos(2πfb + φ) and the carrier signal can be represented by c(t) = Ac cos(2πfc + φ), Now...
  39. M

    Vector component perpendicular

    Homework Statement Suppose v = <-3,-2, 1> and w = <-1,1,1>. Then projw(v) = < -2/3, 2/3, 2/3 > , and the component of v perpendicular to w is? Homework Equations The Attempt at a Solution I understood how to get the projection, and tried using the component formula...
  40. V

    Is There a Correct Way to Pronounce Component?

    Pronunciation of "component" Hello Physics Forums, I just have a quick question. How do you pronounce "component", as in a vector component? Do you stress the first or second syllable? It seems that all of my physics teachers and professors stress the first syllable, while all of my math...
  41. F

    Standard deviation for a signal with a noise component

    Hello, I've been trying to find the answer to this question on the internet but no real luck so here goes: Imagine a signal My_signal which has two components, the actual signal A which is not constant over time and a noise component, we can call it N, where said noise component has a standard...
  42. W

    Standard optical component symbols?

    Of course we all know the standard symbols to use when drawing electrical circuits, but is there an analog for optical setups? I'm working of a poster and most of the symbols I'm using are just boxes with labels next to them, or just lines for mirrors and lenses.
  43. R

    Vectors/Tensors-spherical coordinates. z component of force of fluid on a sphere

    i am a chemical engineer but this is fluid mechanics stuff so i figured you physics geniuses would know this stuff so to find the z component of force exerted by fluid on the surface of the sphere they find the normal force acting on a surface element of the sphere, integrated over the entire...
  44. D

    What do the labels on electrical components mean?

    Hey, On the back of the circuit boards in most electronics there are labels for the parts. I know a few of them: R - Resistor C - Capacitor L - Inductor D - Diode Q - Transistor (Is this all transistors or just BJTs?) U - Integrated Circuits However, there are some that I don't...
  45. P

    Electromagnetic Waves' Magnetic Component

    This is just a conceptual question that I've been personally wondering about. So light has a magnetic field wave perpendicular to an electric field wave. I don't quite understand the magnetic field wave though. I thought that magnetic fields were not supposed to have a beginning or end. They...
  46. E

    Component of the quadrupole Q_ij

    Hello, I do not manage to visualize the link between the component of the quadrupole Q_ij and the spatial distribution of the electric quadrupole field. I was told to imagine the Q_ij as an ellipsoid, which I understand (the ellipsoid "radius" in a given direction being the strength of the...
  47. Z

    Differentiate y component of velocity wrt time

    Homework Statement A ball is thrown with an angle of 45 degrees to the horizontal by a person standing on the ground. The y-component of the velocity of ball in projectile motion is differentiated with respect to time. i.e. dv/dt of the y-component of velocity.Homework Equations The Attempt at...
  48. Spinnor

    4 component spinor isomorphic to S^7?

    I was told the space S^3 is isomorphic to the set of all 2 component spinors with norm 1 (see https://www.physicsforums.com/showthread.php?t=603404 ). Can I infer that the space of all 4 component spinors with norm 1 is isomorphic to S^7? If so is a Dirac spinor isomorphic to S^7? Thanks for...
  49. Spinnor

    Can a point in S^3 be uniquely labeled by a 2 component Spinor?

    Can a point in S^3 be uniquely labeled by a 2 component Spinor? Thanks for any help!
  50. X

    What does couples as the 4th component of a vector mean in the Dirac equation?

    What does "couples as the 4th component of a vector" mean in the Dirac equation? I'm doing an exercise regarding the spin-orbit operator and the Dirac equation/particles, and I'm having trouble understanding the link between terminology and mathematics. The particular phrase I'm having trouble...
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