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24 Pages

### Lecture16

Course: AST 142, Fall 2009
School: Rochester
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Word Count: 1701

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in Today Astronomy 142: the Milky Way, continued Stellar relaxation time Virial theorem Differential rotation of the stars in the disk The local standard of rest Rotation curves and the distribution of mass The rotation curve of the Galaxy Figure: spiral structure in the first Galactic quadrant, deduced from CO observations (Clemens, Sanders, Scoville and Solomon 1988) Astronomy 142 1 Stellar encounters:...

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Problem Set #5, AST111due Tuesday Oct 12, beginning of class 1) Calculate the equilibrium temperature of the Moon as a function of latitude (see PS problems 3.5, 3.6). Assume that the moon is a rapid rotator with zero obliquity, has a bond albedo of
Rochester - AST - 111
AST111, Lecture 1bPlanetary properties (overview continued) The Celestial Sphere (our coordinate system).Planetary properties (continued): Measuring Mass The orbital period of a moon about a planet depends on the semi-major axis and on the plane
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AST111 - Elementary Astronomy: Origins of the Solar System and BeyondLectures: TR 11:05am -12:20pm, Bausch and Lomb Hall (B+L) Room 270 Workshops: M7-9pm, B+L480, by tradition. Problem sets are due the next day at the beginning of class. Labs: R 6:
Rochester - AST - 111
Problem Set #4, AST111Solutions 1) On Spectral resolution and Absolute magnitude. When you observe with your eye you see light over a large wavelength range (about 4000-7000). We can think of the eye as having spectral resolution R ~ 5. Supposing yo
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Relected light from dust in AB Aurigas debris diskAST111, Lecture 3bAST111, Lecture 3bThe Dynamics of Small Bodies Dissipative and Radiation ForcesAdditional Forces on Small BodiesFor planets, gravity is the largest force. However small bodi
Rochester - AST - 111
Astronomy 111 Lab ManualFall 2004CCD cameras: basic operation, and the pinhole cameraIntroductionCharge-coupled devices (CCDs) were invented at AT&amp;T Bell Laboratories in the late 1960s. A CCD consists of a silicon wafer patterned in the manner
Rochester - AST - 142
Astronomy 142 Workshop #8: Problems1. The epicyclic frequency. Consider a star in a nearly circular orbit in a galaxy. We can think of the motion of the star as a radial oscillation about a circular orbit of radius R0 . The frequency of radial oscil
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BST 446 Homework # 3 (Due in one week from 2/13) 1. In the last homework assignment, you have constructed the variableEDULEVEL for theDOS data. Use these variables to answer the following questions. (a) Use the Pearson chi-square statistic to test
Rochester - BST - 466
data dd; set dosSurivivalBygender; nf=effsize-failed; array t[2] nf failed; do i=0 to 1; depression=i; count=t[i+1]; output; end; keep gender Uppertime depression count; run; proc freq data=dd; weight count; tables Uppertime*depression*gender/cmh NOC
Rochester - BST - 466
Rochester - BST - 466
3.3. The generalized linear models The term generalized linear model (GLM) was rst introduced in a landmark paper by Nelder and Wedderburn (1972), in which a wide range of seemingly disparate problems of statistical modelling and inference were set i
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libname path &quot;C:\&quot;; symbol1 c=blue; proc freq data=path.survival; tables Year*majorminordepp/NOCOL NOCUM NOPERCENT NOROW; run; data one; set path.survival; if majorminordepp=1 and year=0 then delete; if majorminordepp=1 then year=year-1; if gender=.
Rochester - BST - 466
DATA ssd; INPUT gender dep count; DATALINES; 1 0 211 1 1 103 1 3 65 2 0 175 2 1 44 2 3 19 ; proc freq data=ssd; weight count; table gender*dep/all trend cmh; exact fisher chisq trend jt; run;31, 2008 428 The FREQ Procedure Table of gender by dep gen
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Rochester - BST - 466
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BST 466 Midterm Exam 1. The PPW data set is from a study about depression in post partum women with N = 198. Each of the 198 women in the study has been screened for depression based on the Edinburgh postnatal depression (EPDS) scale, and undergone a
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Rochester - BST - 466
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Rochester - BST - 466
Rochester - BST - 466
Rochester - BST - 466
3.4.3. Models for ordinal responses Ordinal response occurs more frequently than nominal response in practice. For ordinal response, it is natural to model the cumulative response probabilities j = Pr (Y j) , j = Pr (Y = j) , j = 1, . . . , J 1, j
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McNemars test By employing essentially the same procedure as for comparing two conditional proportions (p1 and p2), but taking into account b b the dependence between p2+ and p+2, we can develop a chisquare test statistic:(n12 n21)2 2. n12 + n21
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Rochester - BST - 466
Rochester - BST - 466
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