Coloured objects, red ones, blue ones, whatever. For this purpose, one assumes that light is waveforms as opposed to particles of energy. Traditional theories state that a green object appears green because it reflects green light and absorbs other frequencies: red, likewise. What property does the substance have to cause it to reflect certain wavelengths and to absorb others? Is this related to luminescence and fluorescence?

Chi-square tests are nonparametric tests that examine nominal categories as opposed to numerical values. Consider a situation in which you may want to transform numerical scores into categories. Provide a specific example of a situation in which categories are more informative than the actual values.

Suppose we had conducted an ANOVA, with individuals grouped by political affiliation (Republican, Democrat, and Other), and we were interested in how satisfied they were with the current administration. Satisfaction was measured on a scale of 1-10, so it was measured on a continuous scale. Explain what changes would be required so that you could analyze the hypothesis using a chi-square test. For instance, rather than looking at test scores as a range from 0 to 100, you could change the variable to low, medium, or high. What advantages and disadvantages do you see in using this approach? Which is the better option for this hypothesis, the parametric approach or nonparametric approach? Why?"

Code using JAVA:

must include "Main Method" for IDE testing!

/**
* Definition for a binary tree node.
* struct TreeNode {
* int val;
* TreeNode *left;
* TreeNode *right;
* TreeNode() : val(0), left(nullptr), right(nullptr) {}
* TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
* TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {}
* };
*/
class Solution {
public:
vector<int> preorderTraversal(TreeNode* root) {
  
}
};

Given the root of a binary tree, return the preorder traversal of its nodes' values.

Example 1:

Input: root = [1,null,2,3]
Output: [1,2,3]

Example 2:

Input: root = []
Output: []

Example 3:

Input: root = [1]
Output: [1]

Example 4:

Input: root = [1,2]
Output: [1,2]

Example 5:

Input: root = [1,null,2]
Output: [1,2]

Constraints:

• The number of nodes in the tree is in the range [0, 100].
• -100 <= Node.val <= 100

  

Consulting: INITIAL INTERVIEW

You are a CEO (Michelle Royal) of Goodwill Industries of Boston, which serves twelve locations in the greater Boston area.  Overall, the stores are doing very well but you know they can be more successful and productive.  For example, you have experienced positive retail revenue growth over the past three years; however, the growth was still lower than the average and your donor volume is down. On the other hand, your sales per square foot outperformed the national average.

Consequently, you called Headquarters (HQ) and investigated the possibility of having a consultant come to Boston to review your situation and give recommendations for improvement.  You were talking to the CEO in Chicago and she explained that she found the consulting to be a very helpful exercise.  The contact at HQ asked you a few questions and said that Jane/Joe Reynolds, an inhouse retail consultant, would be giving you a call.

You have been in your position for one year.  You did not have any previous retail experience before taking the Goodwill position.  You have pretty much continued the work of your predecessor and have tried to remain very independent and creative.  For example, you and your staff like to create your own signage as opposed to using the standard Goodwill prototypes. Your expertise is finance and you have been able to implement and maintain excellent financial reports.

You suspect that improvement can be made through increased efficiency and production.

Some areas that you think might need attention:  merchandise layout, pricing, sorting and processing, transportation.  Furthermore, your new Retail Manager thinks one of your store managers might be ineffective. Your style has been rather formal.  You tend to work one-on-one with your key managers and supervisors.

Though you want help (you really want to surpass all Goodwill averages), you are concerned about having a consultant come and "snoop around."  You realize that this is the only way, however, so you decide to talk to the consultant and see what he suggests in terms of coming to Boston.  You are very concerned about how he/she is going to go about the project.  You would like to keep things very quiet, not involve too many people, and not stir things up.  After all, it seems to you that things are going generally well.

Background info: The mission of Goodwill is to provide work for underprivileged and to do that through retail stores. The underprivileged are trained for a period of time by working in the stores and then sent out into the broader marketplace. Consequently, the Goodwill Stores (collecting old stuff and selling it), is only a means for the real mission.

Goodwill HQ has a team of internal consultants, each with different areas of expertise, who are available to travel to the different locations when they need help. The individual Goodwill locations are independent and are “loosely” tied to HQ, more as nonprofit associations, not industry. Consequently, the CEOs of the various Goodwill locations want assistance but also want to remain independent—the classic “push-pull” that consultants encounter.

Assignment:

You are the Goodwill HQ Consultant that Michelle calls. Since she is in Boston and you are in D.C., you decide to conduct the conversations (which you two have formally scheduled) through visual WEBX so you can see one another faces.

Brainstorm and jot down how you would go about the interview. Following the information in your consulting packet on how to conduct the exploratory phase of formulating an intervention, what questions would you ask? How would you explain your role and the parameters of the consulting arrangement? How would you gain Michelle’s trust? What kind of resistance do you think she will demonstrate? How will you handle that resistance?

Then, actually write out an entire conversation, making it up as you go, demonstrating the skills sets that you know you have to demonstrate. Have Michelle challenge you and deal with her resistance and getting through all phases of the exploratory phase. End the session by summarizing next steps.

You:

Michelle:

You:

Michelle:

Etc.

This is the last discussion.

1) Where do you see technology leading us in terms of the future?

2) Identify a device (anything that has a CPU) that we use every day that is not protected and subject to being hacked?

3) What do you recommend to protect the device?

Please answer this question ASAP. I need it very badly.

Explain how would Nike manage their inventory and whether an adaptation of the Economic order quantity model would be useful for them.

Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week. A sample of 65 weekly reports showed a sample mean of 17.5 customer contacts per week. The sample standard deviation was 5.4. Provide 90% and 95% confidence intervals for the population mean number of weekly customer contacts for the sales personnel.

90% confidence interval, to 2 decimals:

( ,  )

95% confidence interval, to 2 decimals:

( , )

Jenny had discovered some new friends on the Internet—friends who shared her interest in programming. One of these new friends sent her a link to a new warez (illegally copied software) site.

She downloaded a kit called Blendo from the warez site. Blendo is a tool that helps novice hackers create attack programs that combine a mass e-mailer with a worm, a macro virus, and a network scanner. She clicked her way through the configuration options, clicked a button labeled “custom scripts,” and pasted in a script that one of her new friends had e-mailed to her. This script was built to exploit a brand-new vulnerability (announced only a few hours before).

Although she didn’t know it, the anonymous high-schooler had created new malware that was soon to bring large segments of the Internet to a standstill.

She exported the attack script, attached it to an e-mail, and sent it to an anonymous remailer service to be forwarded to as many e-mail accounts as possible. She had naively set up a mailback option to an anonymous e-mail account so she could track the progress of her creation. Thirty minutes later, she checked that anonymous e-mail account and saw that she had more than 800,000 new messages; the only reason there were not even more messages was that her mailbox was full.

Required:

Evaluate the ethical issues as described in the scenario.

(1000 to 1200 words)

In 1943 Abraham Maslow proposed that individuals have five basic needs, arranged in a hierarchy from lowest to highest they are physiological, safety, love, esteem, and self-actualization. David McClelland focused on a needs-based theory which proposed that individuals have three basic needs: the need for achievement, the need for affiliation, and the need for power. The needs described in both these theories are often used by managers during the motivation and goal-setting process with employees.

1. Why do you believe it is important to understand the needs of your employees? How will this benefit the organization?
2. As a manager what are the basic needs that could be fulfilled by the organization if the Maslow theory is used? What are the needs that fall in line with the McClelland theory?
3. How can the needs listed be turned into motivation to help the employee succeed?

a 70 kg skier is being towed on a rope behind a 450 kg snowmobile on a smooth, snow covered surface at 14 m/s when the snowmobile hits a patch of muddy ground that brings it to a hlat in 10m

What is the average acceleration of the center of mass of the skier-snowmobile system?

So many Japanese terms - for principles, for tools, for ways of thinking. This one, gemba, has been mentioned several times in The Toyota Way. Principle 12 (Chap 18) describes this in some depth. A great deal has been written on gemba. Here is one thread in a lean forum at www.lean.org that discusses gemba - and more specifically gemba checklists. Read through the forum. Download and check out the example file: "Gemba Walk Management Checklist.doc" from Michael Thelen. Evaluate at least one section of this checklist (e.g., Shipping) - how does it support which The Toyota Way principles? where does it conflict with the principles?

Three randomly selected households are surveyed as a pilot project for a larger survey to be conducted later. The numbers of people in the households are 2, 4, and 10. Consider the values of 2, 4, and 10 to be a population. Assume that samples of size n = 2 are randomly selected with replacement from the population of 2, 4, and 10. The nine different samples are as follows: (2, 2), (2, 4), (2, 10), (4, 2), (4, 4), (4, 10), (10, 2), (10, 4), and (10, 10). (i) Find the mean of each of the nine samples, then summarize the sampling distribution of the means in the format of a table representing the probability distribution. (ii) Compare the population mean to the mean of the sample means. (iii) Do the sample means target the value of the population mean? In general, do means make good estimators of population means? Why or why not?

Code using JAVA:

must include "Main Method" for IDE testing!

/**
* Definition for a binary tree node.
* struct TreeNode {
* int val;
* TreeNode *left;
* TreeNode *right;
* TreeNode() : val(0), left(nullptr), right(nullptr) {}
* TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
* TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {}
* };
*/
class Solution {
public:
TreeNode* sortedArrayToBST(vector<int>& nums) {
  
}
};

Given an array where elements are sorted in ascending order, convert it to a height balanced BST.

For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of every node never differ by more than 1.

Example:

Given the sorted array: [-10,-3,0,5,9],

One possible answer is: [0,-3,9,-10,null,5], which represents the following height balanced BST:

      0
     / \
   -3   9
   /   /
 -10  5

The title of the course is OS. All answers should be based on that. Please do not copy and paste answers on chegg or on google for me. All answers should be based on your understanding on the course. Please try as much to answer the questions based on what is asked and not setting your own questions and answering them. Let it be if you want copy and paste answers.

**********************************************************************************************************************************************************************************************************************

(2)

(a). Designers are constantly undertaking research into
possible improvement that can make to various types
of memory that computers use. Often times, the
designers grapple with issues in their design of
computer memories.

(i). Critically compare and contrast cache memory
and magnetic disk storage in a computer system
that you frequently use. You may draw a
suitable diagram and/or a table of comparisons to illustrate your answer, if you desire.

(ii).Discuss three possible issues that cache memory
designers, in your opinion, must address in their
bid to come out with effective and efficient
cache memory to satisfy the demands of
computer users; and explain how they can solve
each of the issues you have discussed.

(b).A business student has approached you for assistance
in doing an ICT assignment that he has been
struggling with, regarding modes of execution of
instructions in a computer system.

(i). Clearly explain, in your own words, the
difference between User mode and Kernel
mode of execution of instructions in a
computer system; draw diagram to illustrate
your answer.

(ii). Describe the circumstances for which System
Calls may be invoked; and explain how the
operating system responds to such invocation.