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01:00:48 ECS 153, Spring 2021; Lecture #17; May 5, 2021 ECS 153, Spring 2021; Lecture #17; May 5, 2021	ECS 153, Spring 2021; Lecture #17; May 5, 2021 ECS 153 Spring 2021. Computer Security. This covers symmetric key cryptography. The video begins at 7:00 from the beginning. key cipher period text bits des ciphertext keys letters letter bit alphabet block caesar things couple frequency fact length thing From Matt Bishop on May 6th, 2021 0 likes 7 plays 0
44:57 Biostatistics Seminar April 6th, 2021 - Prof.… Biostatistics Seminar April 6th, 2021 - Prof. Susan Stewart	Biostatistics Seminar April 6th, 2021 - Prof. Susan Stewart Biostatistics Seminar April 6th, 2021 - Prof. Susan Stewart matches records prescriptions match programs record custom birth person king prescribers length prescription patients pairs identity patient california reviewers linkage From Andrea Carr on April 28th, 2021 0 likes 1 plays
12:25 ECS 120 0:7 combinatorics (discrete math review) ECS 120 0:7 combinatorics (discrete math review)	ECS 120 0:7 combinatorics (discrete math review) length strings ways times string elements n. element pants subsets bit shirts combinatorics sequence rule subset children power outfits permutations From David Doty on March 25th, 2021 0 likes 112 plays 0
01:19:33 ECS 289A Lecture 3a ECS 289A Lecture 3a	ECS 289A Lecture 3a tiles shape tile probability thing string question length determinism delta heads variables times assembly power types coin clause algorithm problem From David Doty on March 22nd, 2021 0 likes 0 plays 0
15:53 ECS 220 9b:8.5 Immerman-Szelepcsényi… ECS 220 9b:8.5 Immerman-Szelepcsényi Theorem NSPACE(s(n)) = coNSPACE(s(n)) for s(n) ≥ log(n)	ECS 220 9b:8.5 Immerman-Szelepcsényi Theorem NSPACE(s(n)) = coNSPACE(s(n)) for s(n) ≥ log(n) space nodes reachability path algorithm node error steps bit proof paths length end graph zeros pad linear log guesses step From David Doty on March 21st, 2021 0 likes 3 plays 0
11:57 ECS 220 8c:8.6-1 Reachability expressed… ECS 220 8c:8.6-1 Reachability expressed logically, and as a game between prover and skeptic	ECS 220 8c:8.6-1 Reachability expressed logically, and as a game between prover and skeptic edge path nodes length reachability phi midpoint size quantifiers input steps graph string idea space witnesses step b1 a1 skeptic From David Doty on March 21st, 2021 0 likes 1 plays 0
09:03 ECS 220 8c:8.4 Savitch's theorem… ECS 220 8c:8.4 Savitch's theorem space-bounded deterministic simulation of space-bounded nondeterminism, space usage of Savitch_s algorithm	ECS 220 8c:8.4 Savitch's theorem space-bounded deterministic simulation of space-bounded nondeterminism, space usage of Savitch_s algorithm space log algorithm path nodes length graph reachability recursion n. bits half memory point root levels level node call stack From David Doty on March 21st, 2021 0 likes 2 plays 0
05:20 ECS 220 8a:8.2 NL and NPSPACE nondeterministic… ECS 220 8a:8.2 NL and NPSPACE nondeterministic space-bounded computation and prover-verifier characterization	ECS 220 8a:8.2 NL and NPSPACE nondeterministic space-bounded computation and prover-verifier characterization space characterization witness length access bits verifier w. np instance path problem computation tape slide memory answer algorithm machine turing From David Doty on March 21st, 2021 0 likes 2 plays 0
07:33 ECS 220 8a:8.1-3 relationship of time and… ECS 220 8a:8.1-3 relationship of time and space-bounded complexity classes	ECS 220 8a:8.1-3 relationship of time and space-bounded complexity classes space tape algorithm length configuration turing np memory computation hierarchy witness verifier witnesses problems complexity usage configurations problem words subset From David Doty on March 21st, 2021 0 likes 1 plays 0
09:25 ECS 220 5b:6.6-4 two lemmas and full proof of… ECS 220 5b:6.6-4 two lemmas and full proof of Ladner_s theorem	ECS 220 5b:6.6-4 two lemmas and full proof of Ladner_s theorem clique strings statement stage steps qi a. y. problem length lemma string input table answer statements language conditions condition return From David Doty on March 21st, 2021 0 likes 12 plays 0
07:45 ECS 220 5b:6.6-1 Ladner's theorem, existence… ECS 220 5b:6.6-1 Ladner's theorem, existence of NP-intermediate problems	ECS 220 5b:6.6-1 Ladner's theorem, existence of NP-intermediate problems problem np string problems theorem length a. answers strings satisfiability evidence complete clique things answer language sac words x. numbers From David Doty on March 21st, 2021 0 likes 12 plays 0
07:59 ECS 220 5a:6.4-5 an oracle making P≠NP ECS 220 5a:6.4-5 an oracle making P≠NP	ECS 220 5a:6.4-5 an oracle making P≠NP string length probability oracle query strings queries b. fact lengths n. probabilistically infinity answer half input problem denominator times output From David Doty on March 21st, 2021 0 likes 12 plays 0
08:16 ECS 220 4c:6.3-2 definition of artificial problem… ECS 220 4c:6.3-2 definition of artificial problem Catch22	ECS 220 4c:6.3-2 definition of artificial problem Catch22 problem input catch-22 steps source diagonalization programs output inputs definition length boolean decision function answer technique times halts shortcuts g. From David Doty on March 21st, 2021 0 likes 10 plays 0
14:14 ECS 220 4b:6.2 upper bounds versus lower bounds ECS 220 4b:6.2 upper bounds versus lower bounds	ECS 220 4b:6.2 upper bounds versus lower bounds algorithm log algorithms problem computation tree comparisons box n. element elements bounds formula leaves comparison bits bit length times array From David Doty on March 21st, 2021 0 likes 17 plays 0
02:44 ECS 220 4b:6.1-1 time constructible functions ECS 220 4b:6.1-1 time constructible functions	ECS 220 4b:6.1-1 time constructible functions function string input machine n. length words sort constructable cetera steps outputs bounds functions t. theorems problem halts turing times From David Doty on March 21st, 2021 0 likes 15 plays 0
07:19 ECS 220 4a:6.1-3 collapse propagates up padding… ECS 220 4a:6.1-3 collapse propagates up padding technique	ECS 220 4a:6.1-3 collapse propagates up padding technique input length cubed algorithm deterministically problem question linear string x. end padding proof fact np cube function lot size season From David Doty on March 21st, 2021 0 likes 22 plays 0