Peripheral Vision Trainer

This program is designed to train your peripheral vision. Click on the Start button and keep looking at the Start button while the digits flash on both sides of it briefly. Type the digits you've seen into the answer field and check it. You need to type all the digits as one number (no spaces - sorry, I'm lazy :-). So, if you've seen 67 and 34, then type 6734. You can change the time delay, the number of digits, and how wide apart from each other the numbers should be in the appropriate fields.

Note: this page runs completely locally in your browser with javascript (which must, of course, be enabled). Nothing gets submitted back to the server.

Note to users of old netscape: if numbers do not appear at the same distance from the center, you have to tell netscape to use fixed fonts for the text fields (don't ask me how!). Netscape 4 and older does not understand CSS and I'm using a hack to pad the numbers with spaces, which only works when the space character is of the same width as the numbers.

OK, enough of introduction. Enjoy the trainer!

Sergey Berezin / berezin at stanford dot edu

Your answer:

Number of digits on both sides:
Delay (ms):
Width:

Sergey Berezin's Publications
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What's new:

Sep 21, 2008:
Post: There is no secret!
Some people make it, and some people don't. What's the secret? [Read post]

July 2, 2008:
Update: no more office phone.
Good-bye Synopsys!

Apr 20, 2008:
Post: Are you aware?
A great video demonstrating the power of our perceptual filters... [Read post]

Publications

[ CS CMU Publication Archive | Papers from H/W Verification Group @ Stanford ]

Publications in BibTeX format.

2004

Sergey Berezin, Clark Barrett, Igor Shikanian, Marsha Chechik, Arie Gurfinkel, and David L. Dill. A Practical Approach to Partial Functions in CVC Lite. //In proceedings of PDPAR'04, July 2004 (Postscript)

Clark Barrett and Sergey Berezin. CVC Lite: A New Implementation of the Cooperating Validity Checker. //In Proceedings of CAV'04, July 2004 (Postscript)

Jacob Chang, Sergey Berezin, and David L. Dill. Using Interface Refinement to Integrate Formal Verification into the Design Cycle. //In Proceedings of CAV'04, July 2004 (Postscript)

2003

Clark Barrett and Sergey Berezin. A Proof-Producing Boolean Search Engine. //In Proceedings of PDPAR 2003 Workshop, Miami, Florida, USA, July, 2003. (Postscript)

Husam Abu-Haimed, Sergey Berezin and David L. Dill. Strengthening Invariants by Symbolic Consistency Testing. //In proceedings of CAV'03, July 2003. (C) 2003 Springer Verlag// (Postscript, Slides in PowerPoint)

Sergey Berezin, Vijay Ganesh, and David L. Dill. An Online Proof-Producing Decision Procedure for Mixed-Integer Linear Arithmetic. //in Proceedings of TACAS'03, LNCS 2619, Warshaw, Poland, April 2003. (C) 2003 Springer Verlag// (Postscript)

2002

Vijay Ganesh, Sergey Berezin, and David L. Dill. Deciding Presburger Arithmetic by Model Checking and Comparisons with Other Methods. //In proceedings of FMCAD'02, LNCS 2517, November 2002. (C) 2002 Springer Verlag// (Gzip'ed Postscript, Postscript, Slides in PowerPoint)

Sergey Berezin. Model Checking and Theorem Proving: a Unified Framework. //Ph.D. Thesis, Carnegie Mellon University, 2002. Also a TR number CMU-CS-02-100.// (Postscript, PDF) See also my thesis page for the related documents.

2001

Yassine Lakhnech, Saddek Bensalem, Sergey Berezin, Sam Owre. Incremental Verification by Abstraction. //TACAS 2001: 98-112//

Dawn Song, Sergey Berezin, Adrian Perrig. Athena: a novel approach to efficient automatic security protocol analysis //Special issue of Journal of Computer Security, v. 9:1,2, pp.47-74, 2001.//

2000

Sergey Berezin, Edmund Clarke, Armin Biere, Yunshan Zhu. Verification of OOO Processor Designs Using Model Checking and a Light-Weight Completion Function //In a special issue of FMSD, 2000.//

1999

Sergey Berezin. Combining Model Checking and Theorem Proving; in Harware Verification. //Thesis Proposal, January 27, 1999. An eternal draft.// (Postscript, and related material page)

1998

Sergey Berezin, Armin Biere, Edmund Clarke, and Yunshan Zhu. Combining Symbolic Model Checking with Uninterpreted Functions for Out-of-Order Processor Verification. //CMU TR CMU-CS-98-124, April 20, 1998, and in Proceedings of FMCAD'98 in LNCS 1522. // ( Postscript)

Edmund M. Clarke, Sergey Berezin. Model Checking: Historical Perspective and Example. //Proceedings of Analytic Tableaux and Related Methods, 1998.//

1997

Sergey Berezin, Sergio Campos, Edmund M. Clarke. Compositional Reasoning in Model Checking. //CMU TR CMU-CS-98-106, February 2, 1998, and in Proceeding of COMPOS'97 Workshop, LNCS 1536.// ( Postscript)

Sergey Berezin, Dilian Gurov. A Compositional Proof System for the Modal mu-calculus and CCS. //CMU TR CMU-CS-97-105, January 15, 1997.// (Postscript)

1996

Sergey Berezin, Edmund Clarke, Somesh Jha, Will Marrero. Model Checking Algorithms for the mu-Calculus. //CMU TR CMU-CS-96-180, September 1996. In Proof, Language, and Interaction, edited by G. Plotkin, MIT Press, 2000. ISBN: 0262161885// ( Postscript)

Dilian Gurov, Sergey Berezin, Bruce M. Kapron. A Modal mu-Calculus and a Proof System for Value Passing Processes. //INFINITY Workshop, Aug. 1996, Pisa, Italy. ENTCS, Volume 5.//

1995

S. Berezin. Hierarchical verification of parallel processes using the modal mu-calculus. ( gzipped Poscript, 462K)//Master thesis. Novosibirsk State University, Novosibirsk, Russia, 1995 (in Russian).//

S. Berezin. A Proof System for Non-Classical Verification of Distributed Systems: An Induction on the Number of Parallel Processes.(gzipped Poscript, 95K) //A part of master thesis. Novosibirsk State University, Novosibirsk, Russia, June 1995 (in English).//

1994

S.A. Berezine. Model Checking in mu-calculus for distributed systems. //In Specification, verification, and net models of concurrent systems. Institute of Informatics Systems, Novosibirsk, Russia, 1994.//

S.A. Berezin, N.V. Shilov. An Approach to Effective Model-Checking of Real-Time Finite-State Machines in Mu-Calculus. //Proceedings of LFCS'94, in LNCS vol. 813 pp.47-55. St. Petersburg, Russia, July 1994.//

1993

S.A. Berezin, N.V. Shilov, P.V. Shneider. An effective model checking for Mu-calculus: from finite systems towards systems with real time. //Bulletin of Novosibirsk Computing Center, Series: Computer Science, issue 1, 1993.//