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COMPLEXITY
NOT
COMPUTATIONAL
OR
MATHEMATICAL
P NTIME NP EXPTIME NC DTIME NEXPTIME
NO
SIMPLER PROBLEMS
WHERE THE BRAIN SAYS
F W T
A1,A2,A3,A4
A1 Enkelpublicaties die in de Science Citation Index, de Social Science Citation Index en de Arts & Humanities Citation Index in Web of Science het documenttype article, letter, note, review of proceedings paper krijgen, kunnenerkendwordenals A1 (z.o. definitie van A1 publicatie in vorigevraag). Anderedocumenttypes, zoals book review, biographical item, editorial material, ..., krijgengeen A1 status en wordendaarom door de reviewer geklasseerdals V. Indienuwpublicatietochgelijkstaataaneenvolwaardigartikel (bijv. in velegevallen van editorial material), dankuntu in samenspraak met de uitgever van het tijdschriftwaarinuwbijdrageverscheen, eenvraagindienenbij Thomson Reuter om het documenttypeomtezettennaar article of review.
ONLY 6 CLICKS TO FULL TEXT
F W T
STANDARDS TOOLBOX
OWL SPARQL EAD XML MARC21 FRBR CSS XML-SCHEMA Unicode Z39.50 ISAAD DTD Z39.88 METS XSLT SSSOAP RDF/XML Handle UTF-8 CQL GRRRRRDL
LOVE FOR BOOLEANS
WARNING: REAL CODE if (!$loginAccount or (($userRoleeq 'reviewer') and !$loginAccount->{departmentRights}) or             ($userRoleeq 'localAdmin' and !$loginAccount->{isLocalAdmin}) or             (($userRoleeq 'superAdmin') and !$loginAccount->{isSuperAdminAccount})) { … }
LICENCED /PUBLIC DOMAIN
DIGITAL PRESERVATION
F W T
Law of conservation of trouble?
Origin in Trade-Off’s? Interpretable (conceptual distance): humans -> machines Processing (time, production): slow -> fast Extensible: namespaces -> bigger model Community: my group -> your group Cost of production: $$  -> $$$$ Security Application Domain: generic (e.g. HTML) -> data models Tradition: If it ain’t broke.. Law Future promises: If I do this then I will … Compatibility: forwards -> backwards
OR
INCOMPLETE INFORMATION?
TIME/CONTEXT? At this moment in time we had only access to (…)
Actors aren’t RATIONAL?
Feature Creep Fallacies of Argumentation Community Pressure? Wrong Business Model Not Invented here Bricolage Funding
LESS = MORE
WORSE = BETTER
Richard Gabriel - 1989 On Simplicity The design must be simple, both in implementation and interface. Better:     simpler implementation   than:      simpler interface
Richard Gabriel - 1989 On Correctness The design must be correct in all observable aspects. It is slightly better to be simple than correct. Better:simpler design than: correct design
Richard Gabriel - 1989 On Consistency Consistency can be sacrificed for simplicity Better:     consistency sacrificed in some cases for simplicity  than:      design must be consistent in all aspects
Richard Gabriel - 1989 On Completeness Completeness can be sacrificed in favor of any other quality Better:	simplicity may overrule completeness than:      simplicity is not allowed to reduce completeness
SIMPLICITY produces successful software SIMPLICITY takes much less time and effort to produce and adapt SIMPLICITY spreads much rapidly, long before any complete, correct, constitent programs sees the market
THANKS :-) PATRICK HOCHSTENBACH – GHENT UNIVERSITY LIBRARY http://lib.ugent.beDATASALON-3 OCT 2009GENT

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Data Salon 3 - Ghent

  • 1.
  • 2.
  • 4. NOT
  • 6. OR
  • 8. P NTIME NP EXPTIME NC DTIME NEXPTIME
  • 9.
  • 10. NO
  • 13. F W T
  • 14.
  • 15.
  • 17. A1 Enkelpublicaties die in de Science Citation Index, de Social Science Citation Index en de Arts & Humanities Citation Index in Web of Science het documenttype article, letter, note, review of proceedings paper krijgen, kunnenerkendwordenals A1 (z.o. definitie van A1 publicatie in vorigevraag). Anderedocumenttypes, zoals book review, biographical item, editorial material, ..., krijgengeen A1 status en wordendaarom door de reviewer geklasseerdals V. Indienuwpublicatietochgelijkstaataaneenvolwaardigartikel (bijv. in velegevallen van editorial material), dankuntu in samenspraak met de uitgever van het tijdschriftwaarinuwbijdrageverscheen, eenvraagindienenbij Thomson Reuter om het documenttypeomtezettennaar article of review.
  • 18. ONLY 6 CLICKS TO FULL TEXT
  • 19.
  • 20. F W T
  • 22. OWL SPARQL EAD XML MARC21 FRBR CSS XML-SCHEMA Unicode Z39.50 ISAAD DTD Z39.88 METS XSLT SSSOAP RDF/XML Handle UTF-8 CQL GRRRRRDL
  • 24. WARNING: REAL CODE if (!$loginAccount or (($userRoleeq 'reviewer') and !$loginAccount->{departmentRights}) or ($userRoleeq 'localAdmin' and !$loginAccount->{isLocalAdmin}) or (($userRoleeq 'superAdmin') and !$loginAccount->{isSuperAdminAccount})) { … }
  • 27. F W T
  • 28. Law of conservation of trouble?
  • 29. Origin in Trade-Off’s? Interpretable (conceptual distance): humans -> machines Processing (time, production): slow -> fast Extensible: namespaces -> bigger model Community: my group -> your group Cost of production: $$ -> $$$$ Security Application Domain: generic (e.g. HTML) -> data models Tradition: If it ain’t broke.. Law Future promises: If I do this then I will … Compatibility: forwards -> backwards
  • 30. OR
  • 32. TIME/CONTEXT? At this moment in time we had only access to (…)
  • 34. Feature Creep Fallacies of Argumentation Community Pressure? Wrong Business Model Not Invented here Bricolage Funding
  • 37. Richard Gabriel - 1989 On Simplicity The design must be simple, both in implementation and interface. Better: simpler implementation than: simpler interface
  • 38. Richard Gabriel - 1989 On Correctness The design must be correct in all observable aspects. It is slightly better to be simple than correct. Better:simpler design than: correct design
  • 39. Richard Gabriel - 1989 On Consistency Consistency can be sacrificed for simplicity Better: consistency sacrificed in some cases for simplicity than: design must be consistent in all aspects
  • 40. Richard Gabriel - 1989 On Completeness Completeness can be sacrificed in favor of any other quality Better: simplicity may overrule completeness than: simplicity is not allowed to reduce completeness
  • 41. SIMPLICITY produces successful software SIMPLICITY takes much less time and effort to produce and adapt SIMPLICITY spreads much rapidly, long before any complete, correct, constitent programs sees the market
  • 42. THANKS :-) PATRICK HOCHSTENBACH – GHENT UNIVERSITY LIBRARY http://lib.ugent.beDATASALON-3 OCT 2009GENT