"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 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 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 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 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 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:
|
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.
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 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 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 United State to lose its comparative advantage in the production of beef. Who lost and who gained from Argentina’s increased competitiveness?
In: Economics