15-440 Distributed Systems. Lecture 10 – Mutual Exclusion. Today's Lecture. NTP correction Totally ordered multicast Centralized Mutual Exclusion Distributed Mutual Exclusion. Server. T 1. T 2. Time. m. m'. Time. Client. T 0. T 3. NTP Protocol. All modes use UDP

ByNewtons First Law Newtons Second Law Newtons Third Law F=ma F= μmg F= μma F NET = F 1 + F 2 + F 3 … F fr F drag F app Force Tension Gravity Acceleration Coefficient of Drag/Friction. Gravitation & Kepler’s Laws. Kepler’s Laws.

ByInsert category One here. Insert category Two here. Insert category Three here. Insert category Four here. Insert category Five here. 1000 pt. 1000 pt. 1000 pt. 1000 pt. 1000 pt. 2000 pt. 2000 pt. 2000 pt. 2000 pt. 2000 pt. 3000 pt. 3000 pt. 3000 pt. 3000 pt. 3000 pt.

ByType Inference def CONS[T]( x:T , lst:List [T]):List[T]={...} def listInt () : List[ Int ] = {...} def listBool () : List[ Bool ] = {...} def baz (a, b) = CONS(a(b), b) def test( f,g ) = ( baz ( f,listInt ), baz ( g,listBool )). Solving ‘baz’.

ByWe can calculate other mechanical thermodynamic properties M j. Stat. Mech. Postulate: If you can calculate a mechanical property X i consistent with the macroscopic parameters, then, <X i > =macroscopic thermodynamic X. Using the postulate.

ByEikonal Equation. k + k = 1. 2. 2. x. z. w. w. c. Plane wave (local homogeneous). 2. 2. 2. Apparent velocity. T + T = 1. 2. 2. c. 2. t(x,z)=2. z. t(x,z)=1. x. 2. 2. 2. (dt/dx) + (dt/dz) = (1/c). Eikonal Eqn. Eikonal Equation. k + k = w. 2. 2.

ByCIS 720. Distributed algorithms. “Paint on the forehead” problem. Each of you can see other’s forehead but not your own. I announce “some of you have paint on your forehead”. Rounds will start at 5pm and will last one minute.

ByCIS 720. Distributed algorithms. Broadcast over a tree. Broadcast in an arbitrary graph. Initiator: num_recd = 0; sum = x init ; send bcast() to all nbrs; while (num_recd != num_nbrs) receive m from j; if m = ack(y) sum = sum + y; num_recd++;

ByCIS 720. Distributed algorithms. “Paint on the forehead” problem. Each of you can see other’s forehead but not your own. I announce “some of you have paint on your forehead”. Rounds will start at 5pm and will last one minute.

ByCERL 7.0: Complete linear and second-order optics First optics since CERL 3.0. Now uses CESR with existing layout. 22 X-ray beamlines. Jim Crittenden (for Chris Mayes, Carol Johnstone and Georg Hoffstaetter) ERL @ CESR, 11December 2008. I. Brief Discussion of the Optics

ByCERL 7.0: Complete linear and second-order optics First optics since CERL 3.0. Now uses CESR with existing layout. 22 X-ray beamlines. Jim Crittenden (for Chris Mayes, Carol Johnstone and Georg Hoffstaetter) ERL @ CESR, 11December 2008. I. Brief Discussion of the Optics

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