Questions
"Database design" is the second phase in the database life cycle. This phase focuses on the...

"Database design" is the second phase in the database life cycle. This phase focuses on the design of the database model that will support an organisation’s operations and objectives. Explain key activities along with relevant examples in the context of designing a database to support the medical practice’s patient appointments system.  

Based on the definition of a transaction as “a logical unit of work that must be entirely completed or aborted; no intermediate states are accepted”, use a specific example to demonstrate why no intermediate states are accepted.

In: Computer Science

Several Gulf Coast states most notably Florida but also AL and TX have started artificial coral...

Several Gulf Coast states most notably Florida but also AL and TX have started artificial coral reef programs off of their coasts. From your knowledge of the structure of coral reefs and their requirements to establish describe what is involved in starting and artificial reef and given the bottom characteristics along the Gulf Coast why these steps are necessary. Also explain why states like Mass. Washington, and Maine have not started similar programs.

In: Biology

Write down the equation for the rate of entropy production, diS/dt, for the Bernoulli process 0⇄1...

Write down the equation for the rate of entropy production, diS/dt, for the Bernoulli process 0⇄1 with states 0 and 1, forward rate constant w10 and reverse rate constant w01. Reformulate the equation to eliminate the summation of logarithmic terms. Use your final result to calculate the equilibrium distribution. What are the equilibrium probabilities of states 0 and 1 if w10=w01. Calculate the equilibrium entropy, S°, of the system for w10=w01. 6

In: Other

Your assignment is to analyze the relationship between two sets of scores using the inferential statistical...

Your assignment is to analyze the relationship between two sets of scores using the inferential statistical procedure of an independent two sample t-hypothesis test. Using StatCrunch SPSS, you must calculate and analyze both descriptive and inferential statistics data. The data collection in analysis for this final project is aligned with concepts learned during several weeks of this course.

The data you are being provided with relates to information collected pertaining to the current COVID-19 pandemic. You are being asked to analyze this “case” data derived from 3 states California, New York, and Washington state, each row within the states represent confirmed cases by 9 (n=9) counties. The data from each state identifies the actual number of confirmed COVID-19 cases as of late April 2020, your role as a behavioral research assistant is to analyze the data from your choice of only two of these states (choose and compare CA: to either NY or WA state) and demonstrate whether or not there is a statistical difference in the number of identified cases between your choice of two states. Critical elements or parts of this final project include knowledge of; descriptive statistics, the statistical cycle of inquiry (inferential set up), and inferential statistics.

In: Statistics and Probability

In the energy level diagram shown below, the energy difference between States 3 and 4 is...

In the energy level diagram shown below, the energy difference between States 3 and 4 is half the energy difference between states 2 and 3. An electron undergoes a transition (a quantum \"leap\") from State 4 to State 3 resulting in the emission of a photon having a wavelength of 660 nm. (Note: 1 nm = 10-9 m.)

What is the frequency the emitted photon resulting from an electron making a transition from State 4 to State 3.

f4 to 3 =

What is the frequency the emitted photon resulting from an electron making a transition from State 3 to State 2.

f3 to 2 =

What is the wavelength of the photon that is emitted when an electron makes a transition from State 3 to State 2?

λ3 to 2 =

What are the frequency and wavelength of a photon that is emitted when an electron makes a transition from State 4 to State 2?

f4 to 2 =

λ4 to 2 =

The energy difference between States 1 and 2 is five times the energy difference between States 3 and 4. What are the frequency and wavelength of a photon that is emitted when an electron makes a transition from State 4 to State 1?

f4 to 1 =

λ4 to 1 =

In: Physics

Locate one or more Web sites that explain the acid-base balance of the human body. The...

Locate one or more Web sites that explain the acid-base balance of the human body. The Web sites should be valid scholarly references. It is suggested to search through the ODU library database. Please do not use Wikipedia. The URL will most likely end with “edu” or “org.” Use the Web sites to answer the following questions. Please do not cut-and-paste the text from the Web site. You should paraphrase and properly reference (APA) each Web site. Use complete sentences and please limit the use of lists and bullets. Questions:

1. Explain metabolic acidosis and alkalosis. Please be thorough.

2. Explain respiratory acidosis and alkalosis. Please be thorough.

3. What disease states are connected with metabolic acidosis?

4. What disease states are connected with metabolic alkalosis?

5. What disease states are connected with respiratory acidosis?

6. What disease states are connected with respiratory alkalosis?

7. How does hypoventilation correct a pH imbalance?

8. How does hyperventilation correct a pH imbalance?

9. How does the kidney correct a pH imbalance?

10. What are the normal ranges for blood gases?

11. Proper APA reference list of the Web sites.

In: Biology

Please answer the following: United Dairies, Inc., supplies milk to several independent grocers throughout Dade County,...

Please answer the following:

  1. United Dairies, Inc., supplies milk to several independent grocers throughout Dade County, Florida. Managers at United Dairies want to develop a forecast of the number of half gallons of milk sold per week. Sales data for the past 12 weeks are:

Week

Sales

1

2,750

2

3,100

3

3,250

4

2,800

5

2,900

6

3,050

7

3,300

8

3,100

9

2,950

10

3,000

11

3,200

12

3,150

1. Compute four-week and five-week moving averages for the time series.

    1. Compute the MSE for the four-week and five-week moving average forecasts.
    2. What appears to be the best number of weeks of past data (three, four, or five) to use in the moving average computation? The MSE for three weeks is 23527.78
  1. Show the exponential smoothing forecasts using α = 0.1.
    1. Applying the MSE measure of forecast accuracy, would you prefer a smoothing constant of α=0.1 or α= 0.2 for the United Dairies sales time series?
    2. Are the results the same if you apply MAE as the measure of accuracy?
    3. What are the results if MAPE is used?

3.    Use exponential smoothing with a α = 0.4 to develop a forecast of demand for week 13. What is the resulting MSE?

           

In: Math

United Motors specializes in producing one specialty vehicle. It is called Surfer and is styled to...

United Motors specializes in producing one specialty vehicle. It is called Surfer and is styled to easily fit multiple surfboards in its back area and​ top-mounted storage racks.

United has the following manufacturing​ costs:

United currently produces 180 vehicles per month

Plant management​ costs,

$1,728,000 per year

Cost of leasing​ equipment,

$2,856,000 per year

​Workers' wages,

$800 per Surfer vehicle produced

Direct materials​ costs: Steel,

$1,600 per​ Surfer; Tires, $150

per​ tire, each Surfer takes 5 tires​ (one spare)

City​ license, which is charged monthly based on the number of tires used in​ production:

​0-500 tires

$70,000

​501-1,000 tires

$80,000

more than​ 1,000 tires

$230,000

Requirements

1.

What is the variable manufacturing cost per​ vehicle? What is the fixed manufacturing cost per​ month?

2.

Plot a graph for the variable manufacturing costs and a second for the fixed manufacturing costs per month. How does the concept of relevant range relate to your​ graphs? Explain.

3.

What is the total manufacturing cost of each vehicle if 95 vehicles are produced each​ month? 220 vehicles? How do you explain the difference in the manufacturing cost per​ unit?

In: Accounting

Suppose the United Auto Workers union obtains a substantial wage increase for auto workers. How will...

Suppose the United Auto Workers union obtains a substantial wage increase for auto workers. How will this affect the market for automobiles?

Draw a graph depicting the supply and demand for cars to illustrate your answer and attach with your response.

In: Economics

Explain the concept of comparative advantages in trade. Explain how Argentina’s incorporation of technology cause the...

Explain the concept of comparative advantages in trade. Explain how Argentina’s incorporation of technology cause the United State to lose its comparative advantage in the production of beef. Who lost and who gained from Argentina’s increased competitiveness?

In: Economics