Ace - AI Tutor
Ask Our Educators
Textbooks
My Library
Flashcards
Scribe - AI Notes
Notes & Exams
Download App
ruben jackson

ruben j.

Divider

Questions asked

BEST MATCH

Which cement releases fluoride? ? Glass Ionomer ? Dycal ? Polycarboxylate ? Copalite

View Answer
divider
BEST MATCH

Which of the following statements about regulation of gene expression is true? Show Hint Gene regulation cannot occur once the protein has been translated. Gene regulation only occurs prior to transcription. Gene regulation can occur at any time during the process. Gene regulation cannot occur once the processed mRNA is released into the cytoplasm. Gene regulation cannot occur once the protein is active.

View Answer
divider
BEST MATCH

Describe the factores that determine the changing of a joint angle

View Answer
divider
BEST MATCH

Exercises 23 through 27 describe a situation. For each, identify all forces acting on the object and draw a free-body diagram of the object. | A cat is sitting on a window sill. | A steel beam, suspended by a single cable, is being lowered by a crane at a steadily decreasing speed.

View Answer
divider
BEST MATCH

General Requirements: 1. Choose a Y (outcome measure) that someone cares about (at your firm using real data, preferably). It can be a good thing like profit, time spent on project (efficiency measure), or a worthwhile project. If you can find a Y of interest, your whole project will be of interest. 2. Once you choose a CONTINUOUS Y of interest, choose a policy oriented X. Your project's implications revolve around b, (the relationship between X and Y). So if Y=sales and X=advertising the beta gives interesting information (i.e. is advertising effective?). If X=months then that is not as interesting ... (i.e. each month sales increase by 10%...that's nice but does not tell the manager how to improve sales). So choose an X that implies ACTION. Not all of your Xs have to imply that ACTION should or shouldn't be taken, but at least one. 3. Don't use a Macroeconomic Y like Dow Jones or Unemployment in U.S. or Per Capita income. Someone else has already done studies much more in depth than you will here. Choose a Y that YOU know about... like something from your work, hobbies, or home. 4. The most common problem that students encounter designing their project is the Y variable they want to use is not continuous. You must have a continuous Y, not a series of 1 through 4, or yes/no in order to use OLS regression. Y must be able to take on a multitude of values. 5. The next most common problem is that students don't match the Y and X values. For example, Y is per store, or per day. YOUR X's MUST ALSO BE per store or per day. 6. You must include at least 4 separate X variables in the regression and more if you have them (note: this cannot be one categorical variable with 5 dummy variable categories). 7. You must have at least one categorical X variable. A variable such as marital status that has 2 categories still just counts as one X variable for the calculation of #6 above. 8. The number of observations must be greater than or equal to 50. 9. Working in groups is required: you may have at most 5 group members. 10. Use a significance level of 10%. 11. The paper should be written as ONE continuous paper with NO SECTIONS. 12. Appendix should be clearly labeled and begin on a new page.

View Answer
divider
BEST MATCH

Texts: 1. Perform NCBI Protein searches to answer these questions (2 pts): a. Are there more sheep (Ovis aries) or mouse (Mus musculus) protein sequences in the RefSeq database? How many of each type are there? b. Identify the longest human protein in the RefSeq database. Give its accession number and length (in amino acids), and provide the accession number of the related mRNA sequence. Also, in one sentence, describe the protein’s function.

View Answer
divider
BEST MATCH

Elaborate the importance of first and second laws of thermodynamics from Islamic perspective.

View Answer
divider
BEST MATCH

3. One of the set operators in the relational algebra can be expressed in terms of the other set operators. Which one is it? Give the algebraic expression in terms of the other set operators. (15 points) 4. Do the operations below commute ? Explain your answer. (7 points) $\Pi_{A_1, A_2}(\sigma_{A_1=x}(R)) = \sigma_{A_1=x}(\Pi_{A_1, A_2}(R))$ 5. Suppose you are given the relational schema R(A1, A2,..., An). Under what con- dition is the following equation true? (8 points) $|\Pi_{A_1}(R)| = |R|$ where $|A|$ stands for the cardinality of A. 6. Give an algebraic expression for the join operator in terms of the other algebra operators. (10 points)

View Answer
divider
BEST MATCH

Let X ~ Unif[-4, 4], and Y = (X+1)$^2$. (a) Find $f_Y(\frac{9}{4})$ and $f_Y(16)$, where $f_Y(\cdot)$ is the probability density function of Y. Separate your answers with a comma. (b) Find P{Y < 16}.

View Answer
divider
BEST MATCH

1. Solve the following questions using signal operations and system characteristics: (PLO1-C A. Compute the even and odd components of $x(t) = e^{jt}$. B. A continuous time signal $x(t)$ is shown in Fig. 1. Produce each of the following signals. a. $x_1(t) = x(t)[u(t) - u(t-1)]$ b. $x_2(t) = x(t)\delta(t - \frac{3}{2})$ c. $x_3(t) = \frac{d[x(t)[u(t)-u(t-1)]]}{dt}$

View Answer
divider