Slop Intercept Method
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The document provides an overview of a presentation on the slope-intercept method for line drawing. It discusses the algorithm for computing the slope and y-intercept of a line and plotting points. It includes an equation figure and working process example. Some key advantages are identifying the slope from the coefficient and y-intercept. Real world examples and references are also included.
Slop Intercept Method
- 1. PRESENTATION ON Slop Intercept Method for Line Drawing ABU MOHAMMAD MUSA 152-15-5682 Hafiza Yesmin 152-15-5775 MEHEDI HASSAN 152-15-5815
- 2. PROJECT OVERVIEW Description Algorithms Figure Working Process Advantages Disadvantages Comments Applications References
- 3. Slope-Intercept ▰The slope-intercept form of a line is a way of writing the equation of a line so that the slope of the line and the y-intercept are easily identifiable. ▰The slope is the steepness of the line, and the y-intercept is the place the line crosses the y- axis. 3
- 4. ALGORITHM ▰Step 1: Compute dx = x2 –x1 ▰Step 2: Compute dy = y2 –y1 ▰Step 3: Compute m = dy / dx ▰Step 4: Compute y = y1 – mx1 ▰Step 5: Set (x, y) equal to the lower left-hand end-point and set xend equal to the largest value of x. If dx < 0, then x = x2, y = y2 and xend = x1. If dx > 0, then x = x1, y = y1 and xend = x2. ▰Step 6: Test to determine whether the entire line has been drawn. If x>xend, Stop. ▰Step 7: Plot a point at current (x, y) position. ▰Step 8: Increment x: x = x+1. ▰Step 9: Compute the next value of y from the equation y = mx + c. ▰Step 10: Go to Step 6. 4
- 6. Working Process ▰Graph the equation: ▰ y = 2x + 4 ▰Before we begin, let's identify the slope and y- intercept. ▰ Slope = 2 or 2/1 ▰ Y-intercept = 4 or (0,4) ▰ ▰Step 1: Plot the y-intercept on your graph. The y- intercept is 4, so I will plot the point (0,4) 6
- 7. Working Process ▰Step 2: From the y-intercept (0,4) use the slope to plot next point. ▰ The slope is 2, so we will rise 2 (up) and run 1 (to the right). 7
- 8. Working Process ▰Step 3: Draw a line through two points. ▰This line represents the equation y = 2x + 4. ▰Every point on this line is a solution to this equation. 8
- 9. REAL WORLD EXAMPLE ▰ When climbing stairs or going upslope, we are experiencing slope intercept. ▰When we’re driving a car upslope too. ▰When we’re trekking up a mountain too. ▰As well when we’re skiing downslope. . 9
- 10. ADVANTAGE ▰In this form, one is able to figure the slope of the line by looking at the coefficient of x. ▰In this form, one is able to figure the x - intercept by looking at the number next to the slope (if there is one). And if there isn’t one, then that person already knows the x and y intercept, as the x intercept and y intercept will be on the origin (0,0). 10
- 11. References ScienceDirect Virtualnerd.com Reference A Reference B Reference C Reference D Reference E Reference D http://www.algebra-class.com/slope-intercept-form.html montereyinstitute.org
- 12. PRESENTATION ON MD.HASNAT SHOHEB 152-15-5813 Thin Film Electroluminescent Display MD MAHBUB MORSHED 152-15-5683
- 13. HISTORY . Electroluminescent displays (ELDs) have a venerable history starting with the experiments of Captain Henry J. Round in 1907 HENRY J. ROUND EL emission from ZnS phosphor powder found in 1936 by Destriau (yellow emission) observation of electroluminescence from a solid state diode
- 14. ELECTROLUMINESCENT DISPLAY (ELD) ▰An electroluminescent display is a category of flat panel display created by sandwiching a thin film of electroluminescent material between two plates. 14
- 15. STRUCTURE OF AN ELECTROLUMINESCENT DISPLAY All Elds Have The Same Basic Structure: There are at least six layers to the device. ▰ The first layer is a baseplate (usually a rigid insulator like glass) ▰ The second is a conductor ▰ The third is an insulator ▰ The fourth is a layer of phosphors ▰ The fifth is an insulator ▰ The sixth is another conductor 15
- 16. THIN FLIM ELECTRO-LUMICENT DEVICE ▰All solid state device ▰Electrical breakdown of the phosphor layer for light generation ▰High brightness ▰Wide viewing angle ▰Red and green lights are bright enough ▰Blue needs more luminance 16
- 17. FIGURE 17
- 18. WORKING PROCESS ▰The thin film EL (Emit Light) glass panel consists of a luminescent phosphor layer sandwiched between transparent dielectric layers and a matrix of row and column electrodes. ▰A circuit board containing the drive and control electronics is connected to the back of the glass panel. ▰Voltage is applied to row and column electrodes causing the area of intersection (a pixel) to emit light. ▰The result of this solid-state design is a flat, compact, reliable, and inherently rugged display with exceptionally fast response times (< 1 ms). 18
- 19. ADVANTAGE ▰Low wattage ▰Long life ▰No external circuitry required (no ballast needed to limit current, it can be plugged directly into AC power and will self-regulate power through it's own resistivity) ▰Can be manufactured into flat flexible panels, narrow strings, and other small shapes ▰Can be made into waterproof computer monitors which are more durable and light weight than LCDs or Plasma screens. ▰Not directional like LCDs when used as a computer monitor, looks good at all angles ▰EL displays can handle an impressive -60 C to 95 C temperature range, which LCD monitors cannot do 19
- 20. DISADVANTAGE ▰Not practical for general lighting of large areas due to low lumen output of phosphors (so far) ▰Poor lumens per watt rating, however typically the lamp is not used for high lumen output anyway ▰Reduced lumen output over time, although newer technologies are better than older phosphors on this point ▰Flexible flat EL sheets wear out as they get flexed, durability is being worked on ▰The lamps can use significant amount of electricity: 60-600 volts ▰Typical EL Needs a converter when used with DC sources such as on watches (to create higher frequency AC power, this is audible) 20
- 21. References ScienceDirect byjus.com/physics/uses-of-led/ Reference A Reference B Reference C Reference D Reference E Reference D en.wikipedia.org/wiki/Electroluminescent_display montereyinstitute.org
- 22. Any Question
- 23. . Thank You