Mathsercise-C. Ratio & Fractions. Ready?. Here we go!. Share £720 in the ratio 5:1. Question 2. 5 + 1 = 6. 720 ÷ 6 = £120. Add the parts of the ratios together to find out how many “parts” there are. Check the total values add back to the original amount!.By Pat_Xavi
View Divide 720 PowerPoint (PPT) presentations online in SlideServe. SlideServe has a very huge collection of Divide 720 PowerPoint presentations. You can view or download Divide 720 presentations for your school assignment or business presentation. Browse for the presentations on every topic that you want.
A szén biogeokémiai körforgása. ( 372 ppm ). (0.12ppm). (1.5ppm). CO 2. CO. CH 4. CO 2. 720. 0.2. 4. Folyók. Biomassza. 3. nCO 2 + nH 2 O (CH 2 O)n + nO 2. Oldott 0.6. 1000. Oldott szerves. Élő. 560. Biomassza. HCO 3 - /CO 3 2-. Elhalt. 37 400. 1200. Fosszilis
CIS 720. Invariant Based Methodology. Producer/consumer problem. co Producer: Consumer: do true do true produce pdata buf = pdata cdata = buf; consume cdata
CIS 720. Replication. Replica Management. Three Subproblems. Your boss says to you, “Our system is too slow, make it faster.” You decide that replication of servers is the answer. What do you do next? What are the questions that need to be answered? Where to place servers?
CIS 720. Concurrency Control. Locking. Atomic statement Can be used to perform two or more updates atomically Th1: …. < x = x + 1; y = z>;……. Th2:………….<m = m + 1;….>;……. Transactions. A database system is a set of shared data objects
CIS 720. Correctness of Concurrent Programs. i := 1 max := A do i < n i = i + 1 if (max < A[i]) max = A[i] od. Concurrency rule.
CIS 720. Passing the Baton Technique. Cigarette Smokers Problem. Three smoker processes, one agent Each smoker needs 3 ingredients: tobacco, paper, match 1st smoker has tobacco, 2 nd smoker has paper 3 rd smoker has match
CIS 720. Lecture 2. Concurrency. …shared variable declaration…. …shared variable initialization… co P 1 // P 2 // P 3 // P 4 oc. Execution of P 1 … P 4 starts concurrently and the co-oc statement completes when all blocks have completed execution. Banking System.
CIS 720. Asynchronous Message Passing. Asynchronous message passing. Send is non-blocking Modeling a channel c: Two variables: sent c , recv c Queue. Example. P1: x = 0; send(x,ch1); receive(x,ch2); P2: y = 2; send(y,ch2); receive(y,ch1). Computing the minimum value.
CIS 720. Message Passing. Message passing systems. Send statements Receive statements. Process naming. P ! m ( para_list ): send message m with parameters para_list to P. send(m( para_list , P)
CIS 720. Mutual Exclusion. Critical Section problem. Process i do (true) entry protocol; critical section; exit protocol; non-critical section od. Correctness. Mutual exclusion: at most one process at a time is executing its critical section