SELECT SQL_CALC_FOUND_ROWS posting_id, rw1.node_name AS subject, rw2.node_name AS topic FROM posting, rewrite_sol_bm AS rw1, rewrite_sol_bm AS rw2 WHERE ota_id=104459 AND type=1 AND library_status=1 AND posting.subject_id=rw1.subject_id AND posting.topic_id=rw2.topic_id AND rw1.node_type=1 AND rw2.node_type=2 ORDER BY library_downloads DESC LIMIT 0, 20 Online TA Profiles - Homework Help from BrainMass
Online TA Profiles
Yongjun Luo, PhD (IP)
OTA ID#: 104459

Education Experience: BSc, Computer Science, Shanghai Jiao Tong University, 1999
PhD (IP), Applied Mathematics, University of Maryland, College Park, In progress
Focus of Study: I am currently working towards my Ph.D in Applied Mathematics of UMCP.
Work Experience: Towson University CS Dept.
2004
I am a research assistant of computer science department. Currently I am working on the Application Object Architecture.

Funder Order Computer System Ltd.
2001-2002
I worked as an advanced programmer.

Sunyard Computer System Ltd.
1999-2001
I worked on several OLTP/OLAP systems.
Skills & Achievements: I am good at system design and analysis and have more than 10 years programming experience.
Career Interests: I am pursuing the ph.D degree of Applied Mathematics of UMCP. And I plan to do the computer science related research after that.
Outside Interests: I like reading, travel, and sports.
Message to Students
and/or Parents:		 I'll try my best to help you to achieve your academic goals.
Postings Answered: 227
Cumulative OTA Rating: 4.8/5  What is OTA Rating?
Top Solutions Downloads
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  1. Mean, median - 1. Each of the three measures of central tendency-the mean, the median, and the mode-are more appropriate for certain populations than others. For each type of measure, give two additional example ...
  2. Statistics Help: Hypothesis Testing - Does Lovastatin (a cholesterol-lowering drug) reduce the risk of heart attack? In a Texas study, researchers gave Lovastatin to 2,325 people and an inactive substitute to 2,081 people (average age 58) ...
  3. Linear Programming Models : Graphical methods - The dean of the Western College of Business must plan the school's course offering for the Fall semester. Students' demands make it necessary to offer at least 30 undergraduate and 20 graduate courses ...
  4. Vector Spaces, Linear Transformations, and Eigenvalues / Eigenvectors, Basis and Diagonalizing Matrices - 1. Answer the following questions A. Is lambda = 2 an eigenvalue of the following matrix? Why or why not? 3 2 3 8 B. Is lambda - -2 an eigenvalue of the following matrix? Why or why not? 7 3 3 ...
  5. Database Question - Why are non-database approaches to data management impractical? How does a database solve these problems? Provide a specific example of an anomaly that is solved by using a database.
  6. Statistics : Sampling Distributions and Probabilities - Americans have become increasingly concerned about the rising cost of Medicare. In 1990, the average annual Medicare spending per enrollee was $3267; in 2003, the average annual Medicare spending per ...
  7. Statistics: Confidence Intervals and Significance Levels - Please see the attached file for the fully formatted problems. Assignment 2: Mixed Problems 1. In your own words explain the difference between a point estimate and an interval estimate of ...
  8. Quadratic Equations and Applications (Four Problems) - Assignment 5: Solutions of Quadratic Equations and their Applications 1. a) x2 + 6x + 7 = 0 b) z2 + z + 1=0 c) (3) ½ Y2 4y-7 (3) ½ = 0 d) 2x2 - 10x + 25 = 0 e) 2x2 +6x + 5 = 0 f) s2 - 4 ...
  9. Real Analysis - 1-Show that if sum a_n converges absolutely then sum a^2_n also converges absolutely.Does this proposition hold without absolute converge. 2-if sum a_n converges and a_n>=0 can we conclude anything ...
  10. Linear Programming Models : Graphical Methods - MSA Computer Corporation manufactures two models of minicomputers, the Alpha 4 and Beta 5. The firm employs five technicians, working 60 hours each per month, on its assemble line. Management insists ...
  11. Normal Distribution, Mean and Standard Deviation - 7.40 A variable of a population has a mean of m = 35 and a standard deviation of o = 42. a. If the variable is normally distributed, identify the sampling distribution of the sample for samples of ...
  12. Probability - If x is normally distributed with µ = 20.0 and σ = 4.0, determine the following: a. P(x≥20.0) b. P(16.0 ≤ x ≤ 24.0) c. P(x ≤ 12) d. P(x = 22.0) e. P(12.0 ≤ x &# ...
  13. Numerical Integration: Composite Midpoint Method and Error - Derive the composite midpoint method and composite error.
  14. Statistics : Sampling Distributions and Probabilities - The average annual cost of automobile insurance is $687 (National Association of Insurance Commissioners, January 2003). Use this value as the population mean and assume that the population standard d ...
  15. Prove that positive real numbers correspond bijectively. - Please see the attached file for the fully formatted problems. Here is the problem: Prove that positive real numbers correspond bijectively to decimal expansions not terminating in an infinite ...
  16. Overbooking Flights - Air America is considering a new policy of booking as many as 400 persons on a airplane that can seat only 350. (Past studies have revealed that only 85% of the booked passengers actually arrive for ...
  17. Real analysis - If y is a limit point of A U B show that y is either a limit point of A or B or both.
  18. Undergrad level Linear Algebra - 27. Emile and Gertrude are brother and sister. Emile has twice as many sisters as brothers, and Gertrude has just as many brothers as sisters. How many children are there in this family? Please see ...
  19. Sphere inside of a Cube : Ratio of Volumes - A cube has a sphere inscribed inside of it. It has another sphere circumscribed on the outside ot if (it being the cube). What is the ratio of the volume of the inside sphere to the volume of the ou ...
  20. Diagonal of Square - The diagonal of a square is 2 meters longer than a side. Find the length of a side. Question also in Attached
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