Writea program in C++ that will simulate the FCFS, SSTF, and LOOK seek optimization strategies. Assuming that:

a.) The disk’s outer track is the 0 track and the disk contains 256 track per surface. Each track holds 10 sectors numbered 0 through 9.

b.) A seek takes 12 + 0.1*T ms, where T is the number of tracks of motion from one request to the next, and 12 is a movement time constant.

c.) One full rotation takes 5 ms.

d.) Transfer time is 1.2 ms.

Use the following data to test your program:

Arrival Time | Track Requested | Sector Requested

0 45 0

23 132 6

25 20 2

29 23 1

35 198 7

45 170 5

57 180 3

83 78 4

88 73 5

95 150 7

For comparison purposes, compute the average, variance, and standard deviation of the time required to accommodate all requests under each of the strategies. Consolidate your results into a table.

 

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The final project is composed of two parts: a research paper and an annotated bibliography. The research paper requires that the student work on it each week, as it is due at the end of module 8. The purpose of the paper is to provide an opportunity for students to investigate a disorder of interest to them, evaluate treatment strategies, draw conclusions, and provide recommendations. The student will use at least five peer reviewed references and five credible websites to build a paper of at least ten pages using APA guidelines.

For this research paper, the student is to select a disorder from the following: ADHD, Generalized Anxiety Disorder, Major Depressive Disorder, Dysthymic Disorder, Bipolar I Disorder, Bipolar II Disorder, Acute Stress Disorder, Anorexia Nervosa, Bulimia Nervosa, Borderline Personality Disorder, Avoidant Personality Disorder, Dependent Personality Disorder, Substance Abuse Disorder, Substance Dependence Disorder. If you are interested in investigating a disorder not mentioned above, please contact your instructor for approval.

The student’s research paper should address the following information:

I- Introduce the disorder and illustrate how it may manifest in a client’s life.
a. Expand on its relevance historically and in modern society
b. What impact does it have on the individual? Family? Community? 
c. In your opinion, is it successfully being addressed in the United States? Why or Why not? Explain and support your position with current literature. 
II- Discuss the criteria for diagnosis
a. Discuss the assessment tools commonly utilized in the diagnostic process.
b. What assessment tools would you recommend based on their reliability and validity? Support your position with current literature. 
III- Introduce common treatment goals for the disorder.
a. Illustrate the behavioral changes that relate to the treatment goals
b. Explain the potential benefit, achieving treatment goals, may have on the individual, family, community. 
IV- Introduce at least three treatment strategies for the disorder. 
a. Explain each strategy, its historical foundation and how/if it is utilized in modern therapy. 
b. Compare and contrast each of the strategies. Discuss strengths, weaknesses, scientific support and how/if it is widely utilized
c. What strategy or strategies would you recommend based on your findings? Support your position.
d. How can treatment progress be evaluated? What are the most effective tools for evaluation? Support your response
V- Discussion
a. What are current strategies to assist those who suffer from the disorder? Are there prevention strategies available? 
b. What are the strengths and weaknesses of the current approach(s)? 
c. What recommendations do you have regarding the treatment process for the disorder and its impact on individuals, families, and communities? Support your response
d. What areas of research are warranted regarding treatment for the disorder?
VI- Conclusion 
a. Summarize

As part of this project, the student is to create an APA formatted annotated bibliography of Web resources. This annotated bibliography should contain at least twenty-four Web resources related to abnormal psychology. Each entry should include a short summary or description of the website, the purpose, how the site demonstrated credibility, and indicate how the information may be beneficial to students and professionals. Credible academic Web resources other than those provided throughout the course are also acceptable

 

 

 

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Task

You are to find the best equation to use when modeling the lowest position of a freely hanging chain

as a function of the distance between the ends of the chain (which will correspond to the neck width of

the wearer). You will then produce a report that explains how you developed and refined your model

referring to your exploration of linear and quadratic functions.

Of the functions considered, both technological and algebraic solutions should be explored and

evaluated.

 

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Calculate the rate of heat conduction through a layer of still air that is 1 mm thick, with an area of 1 m² , for a temperature difference of 20° C.

 

Q57:

Home owners and builders discuss thermal conductivities in terms of the R value (R for resistance) of a material, defined as the thickness divided by the thermal conductivity:

 

                             

(a) Calculate the R value of a 1/8-inch (3.2 mm) piece of plate glass, and then of a 1 mm layer of still air. Express both answers in SI units.

(b) In the United States, R values of building materials are normally given in English units, °F.ft² .hr/Btu. A Btu, or British thermal unit, is the energy needed to raise the temperature of a pound of water by 1°F. Work out the conversion factor between the SI and English units for R values. Convert your answers from part (a) to English units.

(c) Prove that for a compound layer of two different materials sandwiched together (such as air and glass, or brick and wood), the effective total R value is the sum of the individual R values.

(d) Calculate the effective R value of a single piece of plate glass with a 1.0mm layer of still air on each side. (The effective thickness of the air layer will depend on how much wind is blowing; 1 mm is of the right order of magnitude under most conditions.) Using this effective R value, make a revised estimate of the heat loss through a I_m² single-pane window when the temperature in the room is 20°C higher than the outdoor temperature.

 

Q58:

According to a standard reference table, the R value of a 3.5inch-thick vertical air space (within a wall) is 1.0 (in English units), while the R value of a 3.5-inch thickness of fiberglass batting is 10.9. Calculate the R value of a 3.5-inch thickness of still air, then discuss whether these two numbers are reasonable. (Hint: These reference values include the effects of convection.)

 

Q59:

Make a rough estimate of the total rate of conductive heat loss through the windows, walls, floor, and roof of a typical house in a cold climate. Then estimate the cost of replacing this lost energy over the course of a month. If possible, compare your estimate to a real utility bill. (Utility companies measure electricity by the kilowatt-hour, a unit equal to 3.6 MJ. In the United States, natural gas is billed in therms, where 1 therm = 10⁵ Btu. Utility rates vary by region; I currently pay about 7 cents per kilowatt-hour for electricity and 50 cents per therm for natural gas.)

 

Q60:

A frying pan is quickly heated on the stovetop to 200°C. It has an iron handle that is 20 cm long. Estimate how much time should pass before the end of the handle is too hot to grab with your bare hand. (Hint: The crosssectional area of the handle doesn't matter. The density of iron is about 7.9 g/cm³ and its specific heat is 0.45 J/g·°C).

 

Q61:

Geologists measure conductive heat flow out of the earth by drilling holes (a few hundred meters deep) and measuring the temperature as a function of depth. Suppose that in a certain location the temperature increases by 20°C per kilometer of depth and the thermal conductivity of the rock is 2.5 W /m·K. What is the rate of heat conduction per square meter in this location? Assuming that this value is typical of other locations over all of earth's surface, at approximately what rate is the earth losing heat via conduction? (The radius of the earth is 6400 km.)

 

Q62:

Consider a uniform rod of material whose temperature varies only along its length, in the x direction. By considering the heat flowing from both directions into a small segment of length ∆x, derive the heat equation,

 

where K = ktIcp, c is the specific heat of the material, and p is its density. (Assume that the only motion of energy is heat conduction within the rod; no energy enters or leaves along the sides.) Assuming that K is independent of temperature, show that a solution of the heat equation is

 

where T_o is a constant background temperature and A is any constant. Sketch (or use a computer to plot) this solution as a function of x, for several values of t. Interpret this solution physically, and discuss in some detail how energy spreads through the rod as time passes.

 

Q63:

At about what pressure would the mean free path of an air molecule at room temperature equal 10 em, the size of a typical laboratory apparatus?

 

Q64:

Make a rough estimate of the thermal conductivity of helium at room temperature. Discuss your result, explaining why it differs from the value for air.

 

Q65:

Pretend that you live in the 19th century and don't know the value of Avogadro's number* (or of Boltzmann's constant or of the mass or size of any molecule). Show how you could make a rough estimate of Avogadro's number from a measurement of the thermal conductivity of a gas, together with other measurements that are relatively easy.

Q67:

Make a rough estimate of how far food coloring (or sugar) will  diffuse through water in one minute.

 

Q68:

Suppose you open a bottle of perfume at one end of a room. Very roughly, how much time would pass before a person at the other end of the room could smell the perfume, if diffusion were the only transport mechanism? Do you think diffusion is the dominant transport mechanism in this situation?

 

Q69:

Imagine a narrow pipe, filled with fluid, in which the concentration of a certain type of molecule varies only along the length of the pipe (in the x direction). By considering the flux of these from both directions into a short segment ∆x, derive Fick's second law

Noting the similarity to the heat equation derived in Q62, discuss the  implications of this equation in some detail.

 

Q70:

In analogy with the thermal conductivity, derive an approximate formula for the diffusion coefficient of an ideal gas in terms of the mean free path and the average thermal speed. Evaluate your formula numerically for air at room temperature and atmospheric pressure, and compare to the experimental value quoted in the text. How does D depend on T, at fixed pressure?

 

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