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. ToonBlue

    Horizontal and vertical component for electric field

    Homework Statement At the video length 1:25 , why does the vertical component cancel out ? At the video length 3:55 , why does the horizontal component cancel out? Homework EquationsThe Attempt at a Solution I don't seem to understand this part very well for the vertical and horizontal...
  2. M

    What is the x component of .... ?

    What is the x component of (+2m)ι^? Express your answer with the appropriate units. x = ____ __ * My attempted answer was: +2m What is the x component of (+2m/s)ι^? Express your answer with the appropriate units. vx = ____ __ * My attempted answer was: +2m/s What is the x component of...
  3. S

    MHB Using Component Method to Add Vectors

    Use the component method to add the vectors A and B shown in the figure. Both vectors have magnitudes of 3.55 m and vector A makes an angle of $θ = 28.5°$ with the x axis. Express the resultant A + B in unit-vector notation. I don't understand how my answer is wrong. Isn't it $A + B =...
  4. Sam Gallagher

    Gift: SPICE Double Balanced Mixer Component

    << Mentor Note -- ZIP files are a security risk, and the file has been deleted. Please post the individual files instead. Thanks >> I saw a post from 2009 of someone who needed a mixer component to play with. So for learning purposes I zipped a symbol, schematic, and .sub file together for...
  5. H

    Calculating Vectors and Components: Finding A*B and AxB Components

    Homework Statement Vector A lies in the yz plane 65.0° from the positive direction of the y axis, has a positive z component, and has magnitude 5.10 m. Vector B lies in the xz plane 42.0° from the positive direction of the x axis, has a positive z component, and has magnitude 1.70 m. Find (a)...
  6. L

    Designing Bolts for 500kg Machine Component in Trains

    We are working on a machine component structure that weighs around 500 kg.This component is fixed inside the train on top roof using 6 bolts..Now the part is we need to design bolt size and no of bolts under worst condition..The acceleration of train may be taken as 0.3g,where g-accn due to...
  7. vead

    How to Analyze Ion Concentrations in a Mixture of Salts?

    Hello I need some ideas . there are about nine or ten compounds that are present in water [((H3BO3),Ca(No3)2),KNO3, KH2PO4), (K2SO4, (ZnSO4)]how to separate the compounds ? how to measure quantity of each ? I did google search , I got the HPLC , GC , spectroscopy , but I don't understand...
  8. Telemachus

    Differentiation with respect to covariant component of a vector

    I want to prove that differentiation with respec to covariant component gives a contravariant vector operator. I'm following Jackson's Classical Electrodynamics. In the first place he shows that differentiation with respecto to a contravariant component of the coordinate vector transforms as the...
  9. jdawg

    Simultaneous measurement of the momentum component px

    Homework Statement The uncertainty in the position of an electron along an x axis is given as 38 pm. What is the least uncertainty in any simultaneous measurement of the momentum component px of this electron? Homework Equations Position uncertainty = h/ delta p (delta p is the uncertainty in...
  10. O

    Amplitude and Velocity of Component Waves

    Homework Statement A string vibrates according to the equation y(x,t) = 2.0*sin (0.16x)cos (750t) , where x and y are in centimeters and t is in seconds. (a) What are the amplitude and velocity of the component waves whose superposition give rise to this vibration? (b) What is the distance...
  11. X

    Is the tangential acceleration component always zero(wheel?)

    If a wheel is rolling down a hill without slipping then we know the contact point has zero velocity. Is it also true that the tangential acceleration of this point is zero too?
  12. U

    What is the Geodesic Equation for FRW Metric's Time Component?

    Taken from Hobson's book: Metric is given by ds^2 = c^2 dt^2 - R^2(t) \left[ d\chi^2 + S^2(\chi) (d\theta^2 + sin^2\theta d\phi^2) \right] Thus, ##g_{00} = c^2, g_{11} = -R^2(t), g_{22} = -R^2(t) S^2(\chi), g_{33} = -R^2(t) S^2(\chi) sin^2 \theta##. Geodesic equation is given by: \dot...
  13. A

    Operators for measuring superposition component distinctnes?

    Hello, I'm wondering, is it possible to define an operator that gives information about the "distinctness" of superposition components? As a simple example, imagine that we have two particles. Let |3> designate the state in which they are 3 meters apart, let |5> designate the state in which...
  14. T

    Component of weight perpendicular to bar

    Homework Statement http://postimg.org/image/tlvhadljz/ I am trying to find the component of weight perpendicular to the bar. Homework EquationsThe Attempt at a Solution I tried as shown and I got mgcos(theta) but I am supposed to be getting mgsin(theta)
  15. upwardfalling

    Adding Vectors Using the Component Method

    Homework Statement Use the component method to add the vectors vector A and vector B shown in the figure. The length of vector B is 3.25 m and the angle θ = 28.5°. Express the resultant vector A + vector B in unit-vector notation. Homework Equations x = rcos y = rsin The Attempt at...
  16. G

    Why there is dc component in square signal

    hi! when I send a square wave to a digital oscilloscope it detects the signal + dc signal. I wanted to know why. I was thinking about internal resistance of coaxial cable i was using. signal got out of an oscilloscope/wave generator and in channel A of the same oscilloscope/wg. It was +-1...
  17. D

    Source of Magnetic component of light

    Does the magnetic component of light emitted by an antenna arise from the effects of length contractions or from the fundamental magnetic moment of the electron?
  18. F

    Investigating SEU in a Silicon Component Irradiation

    Homework Statement [/B] A silicon component is irradiated in an accelerator. The oxygen ion beam is pointed in the direction of the shortest dimension of the sensitive volume of the device. The energy required for producing an electron/hole pair in silicon is 3.6 eV. It is found that the...
  19. B

    VHDL coding -- Design a component that uses a 4-to-1 multiplexer

    Homework Statement Design a component that uses a 4-to-1 multiplexer to choose between one of four different operations to get the result from. Each of the operations and the multiplexer should be behavioral design in their own modules / files to be used in the overall component design as...
  20. S

    Engineering Finding the component values of a RLC circuit

    What methods could I utilise to find the individual values of the components - resistor, inductor and capacitor - of a series RLC circuit using an oscilloscope, signal generator and 10 ohm resistor. Where each component can be isolated in order to find the voltage etc. I've already found the...
  21. R

    Component functions and coordinates of linear transformation

    Let A(a, b, c) and A'(a′,b′,c′) be two distinct points in R3. Let f from [0 , 1] to R3 be defined by f(t) = (1 -t) A + t A'. Instead of calling the component functions of f ,(f1, f2, f3) let us simply write f = (x, y, z). Express x; y; z in terms of the coordinates of A and A, and t. I thought...
  22. J

    Pendulum forces component form

    Homework Statement Hi, I need help in solving question c) (a pendulum) The required data, problem and relevant equation is in the pictureThe Attempt at a Solution I am not sure how to solve it but here are my thoughts: since mg is working at j y(t)j= mg does that mean K(r-L0) x(t) direction? I...
  23. F

    Perpendicular Component of Vector A in the Plane of A and B

    Homework Statement [/B] Here are two displacements, each measured in meters: A. 4i+5j-6k B. -1i+2j+3k What is the component of A that is perpendicular to the direction of B and in the plane of A and B.? Homework Equations The book gave me a hint to use this equation...
  24. D

    MHB Component of a vector perpendicular to another

    Given $\overline{A}=-4a_{x}+2a_{y}+3a_{z}$ and $\overline{B}=3a_{x}+4a_{y}-a_{x}$. 1.Find the vector component of A parallel to B 2.Find the vector component of A perpendicular to B my solution for 1. $\overline{A}\cdot\overline{b}=-1.372$...
  25. C

    PCA principal component analysis standardized data

    Why is better to use the standardized data using the correlation matrix than say converting data into just similar units. Like say I had data that measured car speeds measured in seconds for some data and the other data measured in minutes. Why would it be better just to measure the data using...
  26. T

    Finding acceleration given normal component [Dynamics]

    Homework Statement [/B] A belt moves over three pulleys at a constant speed v0 [ft/s]. Knowing that the normal component of the acceleration of the portion of the belt in contact with pulley B is aB,n=90 [ft/s2 ]. Determine: (a) speed of the belt, v0 [ft/s], and (b) normal component of the...
  27. R

    All electronic component works on quantum probability

    If I'm right, all electronic component works on quantum probability. I was thinking all these electronic component works on classical physics only. Because probability will not produce 100% result, as and when desired. Thank you.
  28. applestrudle

    Proving the B field in a wire only has theta component?

    Homework Statement Prove in a current carrying wire the magnetic field only has a theta component. Homework Equations ∇ ⋅ B = 0 (dive of magnetic field zero, 2nd Maxwell Eq) ∇ x B = μ J (Ampere's Law, 4th Maxwell Eq) Cylindrical symmetry means B field only dependent on r (distance from z...
  29. M

    Component of angular velocity in rigid body motion -- which is right?

    Let w = (w1, w2, w3) wrt to the body frame of a rigid body, where the body frame is right-handed orthonormal. I have gathered 2 definitions of w from different sources and I am confused at how they connect to one another. One is that the RB rotates about w through its CoM at rate abs(w), the...
  30. binbagsss

    R computation from 1 independent Riemann tensor component

    We have ##R^{1}_{212}## as the single independent Riemann tensor component, and I'm after ##R##. From symmetry properties and contracting we can attain the other non-zero components. The solution then states that ##R_{11}=R^{1}_{111} + R^{2}_{121}=R^{2}_{121}## . I thought it would have been...
  31. evinda

    MHB What will be the form of the \$k^{th}\$ component of \$x^{(i)}\$?

    Hi! (Smile) Suppose that we index the components of the elements of $\mathbb{Z}_p$ by subscripts. Indexing the terms of the sequence by superscripts in parentheses$x^{(i)}$ is a term of the sequence, and $x^{(i)}_k$ its $k$-th component. So, if we have a sequence in $\mathbb{Z}_p$, it will be...
  32. Y

    What is the structural component of disjoining pressure?

    It is widely believed that there are three components of disjoining pressure: the dispersion component (Van der Waals), the electrostatic component and the structural component. For the first two, there are some accepted formulations for calculation. However, I cannot find any equations for the...
  33. M

    Temporal component of the normal ordered momentum operator

    Homework Statement Consider the real scalar field with the Lagrangian \mathcal{L}=\frac{1}{2}\partial_\mu \phi \partial^\mu \phi - \frac{1}{2} m^2 \phi^2. Show that after normal ordering the conserved four-momentum P^\mu = \int d^3x T^{0 \mu} takes the operator form P^\mu = \int...
  34. N

    Why do component vectors not work ?

    1. Homework Statement The millennium eagle passes between a pair of asteroids, as shown. If the mass of the spaceship is 2.50 x 10⁷kg and the mass of each asteroid is 3.50 x 10¹¹kg, find the net gravitational force exerted on the millennium eagle at point (A) and point (B). Treat the asteroids...
  35. P

    Component Reliability: 9V Battery, LM334Z, 33ohm Resistor

    I have very little experience with electronics so I have come here to hopefully gain your insight into an issue that is currently being discuss amongst people who seem to have no clear answers. The circuit I am interested in utilizes a 9V battery run through a LM334Z current regulator, with a...
  36. G

    Wireless window opener component selection

    Hello, As a project I am making a wireless window blinds controller. It will be a motor turning the handle of the blinds. It may or may not use bluetooth and or wifi. It will be wireless through some means though. The device does not raise or lower the blinds.I measured a peak torque of 2 ft...
  37. S

    Does (-2)^(⅔) have an imaginary component?

    Some calculators say (-2)2/3 is equal to ##-\frac{1}{2^\frac{1}{3}}+i\frac{3^\frac{1}{2}}{2^\frac{1}{3}}## while others say its equal to ##4^{\frac{1}{3}}## i.e. ##|-\frac{1}{2^\frac{1}{3}}+i\frac{3^\frac{1}{2}}{2^\frac{1}{3}}|##. I think I am right to imply from above that (-2)2/3 does have an...
  38. C

    What is the Radial Component of Velocity on the Surface of a Solid Sphere?

    Homework Statement In certain hydrodynamic flows the velocity of a liquid is given by v = -grad φ, where φ is referred to as the velocity potential. The potential given by: 'equation' corresponds to flow around a solid sphere of radius a. U is a constant. Determine the velocity of the...
  39. B

    Calculating the Vertical component of the Velocity

    Homework Statement A physics class researching projectile motion constructs a device that can launch a cricket ball. The launching device is designed so that the ball can be launched at ground level with an initial velocity of 28.0 m s–1 at an angle of 30.0 degrees to the horizontal. Homework...
  40. Hijaz Aslam

    Component of a vector along another vector.

    Homework Statement Given ##\vec{A}=2\hat{i}+3\hat{j}## and ##\vec{B}=\hat{i}+\hat{j}##.Find the component of ##\vec{A}## along ##\vec{B}##. Homework Equations ##\vec{A}.\vec{B}=ABcosθ## where θ is the angle between both the vectors. The Attempt at a Solution I attempted the question...
  41. S

    Linear Component of Polarization - Mathematical transformation

    Hello, I'm currently going through Agrawal's book 'Nonlinear Fiber Optics' and got stuck with some mathematical cosmetics (pp. 40). It is the substition of: \vec{P_L}(\vec{r},t) = \frac{1}{2} \hat{x} \left(P_L \exp{(-i \omega_0 t)} + c.c.\right) into \vec{P_L}(\vec{r},t) = \epsilon_0...
  42. R

    Finding the real component of a two dimensional wave

    Homework Statement Show that if the displacement of the waves on a membrane of width b is given by the superposition z=A_1\exp^{i(\omega t-(k_1x+k_2y))}+A_2\exp^{i(\omega t-(k_1x-k_2y))} with z=0 when y=0 and y=b then the real part of z is z=2A_1sin(k_2)sin(\omega t-k_1x) where...
  43. preston8

    Component identification, possibly 'transformer switch'

    I am in the process of reverse engineering an electrical control box for a spa heater, and have stumbled upon a component that I have not encountered before. There are two of these components in the system. I was not able to find any information from the part numbers. The coil leads me to...
  44. T

    How can a horizontal component be of sin? Error in book or my brain?

    I've learned that the horizontal component is F cos angle not F sin angle, but I'm looking right now into the aqa physics a student book from nelson thrones, chapter 2.3 page 27, and it says that the horizontal components going to be made up of sin and the vertical out of cos... This is about...
  45. SteliosVas

    Vertical Component Reactions given angular velocity

    Homework Statement A pendulum consists of a disk of mass M1, and a slender rod of M2 (which happens to be 0kg),. Determine the components of reaction that the pin O, exerts on the rod just as it passes the horizontal postion, at which time its angular velocity is ω. Know we know M1 =...
  46. squelch

    Work done by a component force

    Homework Statement Find the work done by the force \vec{F}=6\hat{i}+8\hat{j} if the object starts from the origin, moves along the x-axis to the point (1,0), then moves in the y direction to the point (1,2). Find the work if instead the object moves diagonally from the origin to the point...
  47. T

    Fitting a mixture model when component priors are known

    I have a list of scores between 0 and 1 generated by an information retrieval system - 1 being very relevant and 0 being completely non-relevant. I do not know whether the scores correspond to relevant or non-relevant items or not but I do know that the distribution of scores is generated by a...
  48. marellasunny

    Electric vehicle component package ideation

    I am in the design phase of a lightweight electric city vehicle with a capacity of 15kWh. I am at a stage where I am moving elements like Electric motors, tranmission, DC-DC converters, Inverters, Battery charger and battery pack in a CATIA software model. In-order to cater to the wide-range of...
  49. J

    What is the name of this component (green)?

    what is the green component? what is the name?
  50. M

    Identifying this unknown component

    I opened my old VCR and on one of the circuits was a component which I couldn't recognize. I am usually quite good at identifying circuit components, by the abbreviations or their symbol. But this one just left me dumb founded. Its letter on the board was FL, I checked on various datasheets...
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