Medicare Part B covers:

A student PTA performs a treatment session and documents the visit independently without any review. This action is:    

Essay – Craft an essay with a defensible thesis, arguments, and plenty of evidence that directly addresses only one of the prompts.   A.  To what degree was the reign and death of Julius Caesar a pivotal turning point for the Roman Republic? OR B.  To what extent did the Roman Empire “fall,” or simply transform?   Essay Outline   I. THESIS (Should make a defensible claim that directly addresses the question and highlights specific themes/arguments.)     II. Themes/Arguments (Evidence should validate your themes/arguments in answering your thesis)                     – Theme/Argument  A                                     – Supporting evidence                                      – Supporting evidence                                     – Supporting evidence                                     – etc.                     – Theme/Argument  B                                     – Supporting evidence                                      – Supporting evidence                                     – Supporting evidence                                     – etc.                     – Theme/Argument  C                                     – Supporting evidence                                      – Supporting evidence                                     – Supporting evidence

The box plots below illustrate the distribution of graduation rates for a sample of public universities and for a sample of private universities. Based on the box plots, which of the following statements is FALSE?

A planning board in local county is interested in estimating the proportion of its residents that are in favor of offering incentives (lower taxes) to high-tech industries to build offices. A random sample of residents from the county was selected and asked, “Are you in favor of offering incentives to high-tech industries to build offices in your county?” A 95% confidence interval for the proportion of residents in favor of offering incentives was calculated to be 0.54±0.05{“version”:”1.1″,”math”:”0.54±0.05″}  Which of the following statements is TRUE about this confidence interval?

Problem 1. (25 pts)  a) Suppose you measure the series resistance/inductance of a three-phase stepper motor with a series LCR meter. The inductance varies between 20mH and 100mH. Also, the inductance has 8 maxima as you rotate the shaft through a revolution. What is the number of rotor teeth and what is LB{“version”:”1.1″,”math”:”LB”}? [2×3 pts] b) For part (a), find the tooth pitch and the step length. [4 pts] c) For part (a), the a-phase is energized with a current of 5 A. Suppose further that the load torque is 2 Nm. Find the stable equilibrium point closest to zero. (An answer of the form of asin(2/3), etc., is fine since you do not have a calculator.) [6 pts] d) Can you have a two-phase VR stepper motor? [2 pts] e) Can you have a four-phase VR stepper motor? [2 pts] f) How does one reverse the direction of the machine? [2 pts] g) If a single phase of a stepper motor is energized, with no load torque, the rotor will move to [maximize or minimize] that phases’ inductance? [2 pts] h) At a stable equilibrium point, what is the sign of the partial derivative of electrical torque with respect to rotor position? [1 pt] Problem 2. (25 pts)  Consider the permanent magnet dc machine nameplate below. a) If the machine is running at rated power while spinning at the rated speed determine the rated torque output. Determine machine parameters, kv & ra{“version”:”1.1″,”math”:”kv & ra”}, assuming that the machine draws rated current at rated power and rated speed. [3×3 pts]. b) Now that you have your machine parameters, develop the torque-speed equation, Te=f(ωr){“version”:”1.1″,”math”:”Te=f(ωr)”}. (ONLY the EQUATION: which one would use to plot torque-speed characteristics in MATLAB). [3 pts] c) Determine the no-load speed of the machine. Leave your answer in fraction and in rad/s. [2 pts]. Determine the torque produced by the machine, at blocked rotor condition. What  can  be  said  about  the  blocked  rotor  operating  condition?  [2×2  pts] Useful fractions: 0.375=3/8, 6.25=25/4 d) This machine is run using the single quadrant chopper in continuous mode supplied by a DC source of 150 V, as discussed in class. Assume the vfd=vfsw=2V{“version”:”1.1″,”math”:”vfd=vfsw=2V”}, determine: a. the duty cycle needed so that the average armature voltage is the rated armature voltage [4 pts] b. the drive efficiency at rated operation. [3 pts] Helpful fractions: 102150=0.68, 1102=0.009804{“version”:”1.1″,”math”:”102150=0.68, 1102=0.009804″} Problem 3. (25 pts)  a) Consider a system below. Consider the transformation to the weird (w) reference frame. fqdw=Kswfabs{“version”:”1.1″,”math”:”fqdw=Kswfabs”} where Ksw=1101{“version”:”1.1″,”math”:”Ksw=1101″} The stator flux linkage equations are given by λabs=2001iabs{“version”:”1.1″,”math”:”λabs=2001iabs”} Express the stator flux linkage equations in the weird reference frame. [5 pts.] Note that for a 2×2 matrix of the form M=abcd,  M-1=d-b-caad-bc{“version”:”1.1″,”math”:”M=abcd,  M-1=d-b-caad-bc”} b) The conductor density of a two-phase machine is given by nas=12 cos(4ϕsm+π/6)nbs=12 cos(4ϕsm-π/3){“version”:”1.1″,”math”:”nas=12 cos(4ϕsm+π/6)nbs=12 cos(4ϕsm-π/3)”} The winding currents are given by ias=10 cos(50t+π/6)ibs =10 cos(50t+2π/3){“version”:”1.1″,”math”:”ias=10 cos(50t+π/6)ibs =10 cos(50t+2π/3)”} The air gap is 0.5 mm. Express the airgap flux density wave in terms of a wave equation. What is the amplitude of the wave? What is the speed and direction of the wave? Recall that trigonometric identities are given above. [20 pts.] Problem 4. (25 pts)  A buried magnet permanent magnet ac machine is very similar to the surface mounted magnet we consider in class but is described by These equations are much like we studied in class, except that the q- and d-axes have different inductances, Lq{“version”:”1.1″,”math”:”Lq”} and Ld{“version”:”1.1″,”math”:”Ld”} instead of Lss{“version”:”1.1″,”math”:”Lss”}. It is desired to achieve an electromagnetic torque Te=Te*>0{“version”:”1.1″,”math”:”Te=Te*>0″} in as efficient a way as possible. For the surface mounted machine, we showed that it is best to only use q-axis current, from an efficiency point of view. In this question, we will explore how things change for the buried magnet machine. For this problem, assume there is no voltage constraint. 1) Derive an expression for q-axis current should be used needed to achieve a desired torque in terms of the desired torque, d-axis current, and machine parameters [5 pts]. 2) Derive an expression for power loss in terms of the d-axis current, torque, machine parameters, but not the q-axis current [10 pts]. 3) Suppose the machine parameters are P=4, λm=0.1Vs, Ld=4mH, Lq=5mH{“version”:”1.1″,”math”:”P=4, λm=0.1Vs, Ld=4mH, Lq=5mH”} and is running at ωr=1000rad/s{“version”:”1.1″,”math”:”ωr=1000rad/s”} . The maximum voltage limit available is Vmax=120V{“version”:”1.1″,”math”:”Vmax=120V”} . Neglect stator resistances. (a) Check whether the operating point iqsr=20A & idsr=0A{“version”:”1.1″,”math”:”iqsr=20A & idsr=0A”} satisfies the voltage limit.  (b) Determine whether flux weakening is needed to run the machine at this operating point. [6 pts] 4) For part 3, if flux weakening is needed, determine if flux weakening is possible with a valid value of id. (You DO NOT need to solve for id since you won’t have a calculator. Your answer should be a yes or no). [4 pts] Congratulations, you are almost done with Exam 2.  DO NOT end the Honorlock session until you have submitted your work to Brightspace.  When you have answered all questions:  Use your smartphone or scanner to scan your answer sheet, and save the scan as a PDF. Make sure your scan is clear and legible.  Submit your PDF  as follows: Email your PDF to yourself or save it to the cloud (Google Drive, etc.).  Submit your exam to this assignment: Exam 2 Return to this window and click the button below to agree to the honor statement. Click Submit Quiz to end the exam.  End the Honorlock session.   

A researcher selects a random sample of size n from a population and uses the collected data to compute a 99% confidence interval for the population mean. If the same data were used to compute a second confidence interval, which of the following would produce a confidence interval with a smaller margin of error?

Using question 9, compute the 90% confidence interval for the population proportion of Cincinnati State MAT 131 students who believe that vaccinations are good for them. Round to three decimal places. n = 491   frequency No 57 Unsure 112 Yes 322

The mineralized zones of a recently discovered gold deposit are thin, sinuous veins in a weak host rock. The most likely choice of a mining method would be:

Assume a flat-lying and tabular deposit. Benching is being practiced. What would the reason be for benching?