default search action

combined dblp search
author search
venue search
publication search

ask others

Pawel T. Wojciechowski

Pawel Tomasz Wojciechowski – Paweł T. Wojciechowski

> Home > Persons

Person information

affiliation: Poznan University of Technology, Poland
unicode name: Paweł T. Wojciechowski
not to be confused with: Pawel Wojciechowski

Refine list

refinements active!

zoomed in on 57 of 57 records

view refined list in

export refined list as

showing all 57 records

refine by search term

refine by type

refine by coauthor

refine by orcid

refine by venue

refine by access Please note:
▪ This facet is still work in progress.
▪ Open access information for publications is still rather incomplete.

2020 – today

see FAQ

What is the meaning of the colors in the publication lists?

2024
[c34]
- view
  authority control:
- export record
  dblp key:
  - conf/hopc/KobusKW24
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/hopc/KobusKW24
Tadeusz Kobus, Maciej Kokocinski, Pawel T. Wojciechowski:
Jiffy: A Lock-free Skip List with Batch Updates and Snapshots (Abstract). HOPC@SPAA 2024
[c33]
- view
  authority control:
- export record
  dblp key:
  - conf/hopc/SiekW24
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/hopc/SiekW24
Konrad Siek, Pawel T. Wojciechowski:
Last-Use Opacity: A Strong Safety Property for Transactional Memory with Prerelease Support (Abstract). HOPC@SPAA 2024
[c32]
- view
  authority control:
- export record
  dblp key:
  - conf/middleware/KokocinskiKW24
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/middleware/KokocinskiKW24
Maciej Kokocinski, Tadeusz Kobus, Pawel T. Wojciechowski:
Creek: A Mixed-Consistency Replication Scheme. Middleware Demos/Posters/Doctoral Symposium 2024: 17-18
[c31]
- view
  authority control:
- export record
  dblp key:
  - conf/middleware/KobusKKW24
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/middleware/KobusKKW24
Tadeusz Kobus, Maciej Kokocinski, Krzysztof Kortas, Pawel T. Wojciechowski:
KDB: A Persistent Key-Value Data Store with Batch Updates and Snapshots. Middleware Demos/Posters/Doctoral Symposium 2024: 23-24
2023
[j12]
- view
  authority control:
- export record
  dblp key:
  - journals/jpdc/KokocinskiKW23
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/jpdc/KokocinskiKW23
Maciej Kokocinski, Tadeusz Kobus, Pawel T. Wojciechowski:
On the correctness of highly available systems in the presence of failures. J. Parallel Distributed Comput. 180: 104707 (2023)
[c30]
- view
  authority control:
- export record
  dblp key:
  - conf/debs/Wojciechowski23
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/debs/Wojciechowski23
Pawel Tomasz Wojciechowski:
A selective and biased choice of techniques for building a distributed data store. DEBS 2023: 1-2
2022
[j11]
- view
  authority control:
- export record
  dblp key:
  - journals/dc/SiekW22
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/dc/SiekW22
Konrad Siek, Pawel T. Wojciechowski:
Last-use opacity: a strong safety property for transactional memory with prerelease support. Distributed Comput. 35(3): 265-301 (2022)
[j10]
- view
  authority control:
- export record
  dblp key:
  - journals/tpds/KokocinskiKW22
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tpds/KokocinskiKW22
Maciej Kokocinski, Tadeusz Kobus, Pawel T. Wojciechowski:
On Mixing Eventual and Strong Consistency: Acute Cloud Types. IEEE Trans. Parallel Distributed Syst. 33(6): 1338-1356 (2022)
[c29]
- view
  authority control:
- export record
  dblp key:
  - conf/ppopp/KobusKW22
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/ppopp/KobusKW22
Tadeusz Kobus, Maciej Kokocinski, Pawel T. Wojciechowski:
Jiffy: a lock-free skip list with batch updates and snapshots. PPoPP 2022: 400-415
2021
[j9]
- view
  authority control:
- export record
  dblp key:
  - journals/tdsc/KonczakWSZS21
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tdsc/KonczakWSZS21
Jan Z. Konczak, Pawel T. Wojciechowski, Nuno Santos, Tomasz Zurkowski, André Schiper:
Recovery Algorithms for Paxos-Based State Machine Replication. IEEE Trans. Dependable Secur. Comput. 18(2): 623-640 (2021)
[c28]
- view
  authority control:
- export record
  dblp key:
  - conf/srds/KonczakW21
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/srds/KonczakW21
Jan Z. Konczak, Pawel T. Wojciechowski:
Failure Recovery from Persistent Memory in Paxos-Based State Machine Replication. SRDS 2021: 88-98
[i8]
- view
  - electronic edition @ arxiv.org (open access)
  - details & citations
- export record
  dblp key:
  - journals/corr/abs-2102-01044
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/corr/abs-2102-01044
Tadeusz Kobus, Maciej Kokocinski, Pawel T. Wojciechowski:
Jiffy: A Lock-free Skip List with Batch Updates and Snapshots. CoRR abs/2102.01044 (2021)
no results

2010 – 2019

see FAQ

What is the meaning of the colors in the publication lists?

2019
[c27]
- view
  authority control:
- export record
  dblp key:
  - conf/podc/KokocinskiKW19
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/podc/KokocinskiKW19
Maciej Kokocinski, Tadeusz Kobus, Pawel T. Wojciechowski:
On Mixing Eventual and Strong Consistency: Bayou Revisited. PODC 2019: 458-460
[i7]
- view
  - electronic edition @ arxiv.org (open access)
  - details & citations
- export record
  dblp key:
  - journals/corr/abs-1905-11762
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/corr/abs-1905-11762
Maciej Kokocinski, Tadeusz Kobus, Pawel T. Wojciechowski:
On mixing eventual and strong consistency: Bayou revisited. CoRR abs/1905.11762 (2019)
[i6]
- view
  - electronic edition @ arxiv.org (open access)
  - details & citations
- export record
  dblp key:
  - journals/corr/abs-1907-00748
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/corr/abs-1907-00748
Tadeusz Kobus, Maciej Kokocinski, Pawel T. Wojciechowski:
Creek: a General Mixed-Consistency Transactional Replication Scheme. CoRR abs/1907.00748 (2019)
2018
[j8]
- view
  authority control:
- export record
  dblp key:
  - journals/spe/KobylinskiSBW18
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/spe/KobylinskiSBW18
Pawel Kobylinski, Konrad Siek, Jan Baranowski, Pawel T. Wojciechowski:
Helenos: A realistic benchmark for distributed transactional memory. Softw. Pract. Exp. 48(3): 528-549 (2018)
[j7]
- view
  authority control:
- export record
  dblp key:
  - journals/tpds/KobusKW18
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tpds/KobusKW18
Tadeusz Kobus, Maciej Kokocinski, Pawel T. Wojciechowski:
Hybrid Transactional Replication: State-Machine and Deferred-Update Replication Combined. IEEE Trans. Parallel Distributed Syst. 29(7): 1499-1514 (2018)
2017
[j6]
- view
  authority control:
- export record
  dblp key:
  - journals/jpdc/KobusKW17
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/jpdc/KobusKW17
Tadeusz Kobus, Maciej Kokocinski, Pawel T. Wojciechowski:
Relaxing real-time order in opacity and linearizability. J. Parallel Distributed Comput. 100: 57-70 (2017)
[j5]
- view
  authority control:
- export record
  dblp key:
  - journals/tpds/WojciechowskiKK17
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tpds/WojciechowskiKK17
Pawel T. Wojciechowski, Tadeusz Kobus, Maciej Kokocinski:
State-Machine and Deferred-Update Replication: Analysis and Comparison. IEEE Trans. Parallel Distributed Syst. 28(3): 891-904 (2017)
[j4]
- view
  authority control:
- export record
  dblp key:
  - journals/tpds/KonczakWG17
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tpds/KonczakWG17
Jan Z. Konczak, Pawel T. Wojciechowski, Rachid Guerraoui:
Operation-Level Wait-Free Transactional Memory with Support for Irrevocable Operations. IEEE Trans. Parallel Distributed Syst. 28(12): 3570-3583 (2017)
2016
[j3]
- view
  - electronic edition via DOI (open access)
  - details & citations
  authority control:
- export record
  dblp key:
  - journals/ijpp/SiekW16
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/ijpp/SiekW16
Konrad Siek, Pawel T. Wojciechowski:
Atomic RMI: A Distributed Transactional Memory Framework. Int. J. Parallel Program. 44(3): 598-619 (2016)
[c26]
- view
  authority control:
- export record
  dblp key:
  - conf/agere/WojciechowskiS16
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/agere/WojciechowskiS16
Pawel T. Wojciechowski, Konrad Siek:
Atomic RMI 2: distributed transactions for Java. AGERE!@SPLASH 2016: 61-69
[i5]
- view
  - electronic edition @ arxiv.org (open access)
  - details & citations
- export record
  dblp key:
  - journals/corr/BaranowskiKSW16
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/corr/BaranowskiKSW16
Jan Baranowski, Pawel Kobylinski, Konrad Siek, Pawel T. Wojciechowski:
Helenos: A Realistic Benchmark for Distributed Transactional Memory. CoRR abs/1603.07899 (2016)
[i4]
- view
  - electronic edition @ arxiv.org (open access)
  - details & citations
- export record
  dblp key:
  - journals/corr/WojciechowskiS16
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/corr/WojciechowskiS16
Pawel T. Wojciechowski, Konrad Siek:
The Optimal Pessimistic Transactional Memory Algorithm. CoRR abs/1605.01361 (2016)
[i3]
- view
  - electronic edition @ arxiv.org (open access)
  - details & citations
- export record
  dblp key:
  - journals/corr/SiekW16
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/corr/SiekW16
Konrad Siek, Pawel T. Wojciechowski:
Atomic RMI 2: Highly Parallel Pessimistic Distributed Transactional Memory. CoRR abs/1606.03928 (2016)
[i2]
- view
  - electronic edition @ arxiv.org (open access)
  - details & citations
- export record
  dblp key:
  - journals/corr/KobusKW16
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/corr/KobusKW16
Tadeusz Kobus, Maciej Kokocinski, Pawel T. Wojciechowski:
Hybrid Transactional Replication: State-Machine and Deferred-Update Replication Combined. CoRR abs/1612.06302 (2016)
2015
[c25]
- view
  authority control:
- export record
  dblp key:
  - conf/podc/KokocinskiKW15
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/podc/KokocinskiKW15
Maciej Kokocinski, Tadeusz Kobus, Pawel T. Wojciechowski:
Brief Announcement: Eventually Consistent Linearizability. PODC 2015: 237-239
[p2]
- view
  authority control:
- export record
  dblp key:
  - conf/cost/KobusKW15
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/cost/KobusKW15
Tadeusz Kobus, Maciej Kokocinski, Pawel T. Wojciechowski:
Introduction to Transactional Replication. Transactional Memory 2015: 309-340
[i1]
- view
  - electronic edition @ arxiv.org (open access)
  - details & citations
- export record
  dblp key:
  - journals/corr/SiekW15
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/corr/SiekW15
Konrad Siek, Pawel T. Wojciechowski:
Last-use Opacity: A Strong Safety Property for Transactional Memory with Early Release Support. CoRR abs/1506.06275 (2015)
2014
[c24]
- view
  authority control:
- export record
  dblp key:
  - conf/eurosys/WojciechowskiS14
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/eurosys/WojciechowskiS14
Pawel T. Wojciechowski, Konrad Siek:
Having your cake and eating it too: combining strong and eventual consistency. PaPEC@EuroSys 2014: 10:1-10:5
[c23]
- view
  authority control:
- export record
  dblp key:
  - conf/srds/KokocinskiKW14
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/srds/KokocinskiKW14
Maciej Kokocinski, Tadeusz Kobus, Pawel T. Wojciechowski:
Make the Leader Work: Executive Deferred Update Replication. SRDS 2014: 89-94
[c22]
- view
  - electronic edition @ springer.com (open access)
  - details & citations
- export record
  dblp key:
  - conf/wdag/SiekW14
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/wdag/SiekW14
Konrad Siek, Pawel T. Wojciechowski:
Relaxing Opacity in Pessimistic Transactional Memory. DISC 2014: 540-541
[p1]
- view
  authority control:
- export record
  dblp key:
  - series/sci/BrzezinskiDKKSSSWW14
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/series/sci/BrzezinskiDKKSSSWW14
Jerzy Brzezinski, Dariusz Dwornikowski, Anna Kobusinska, Jacek Kobusinski, Michal Sajkowski, Cezary Sobaniec, Michal Szychowiak, Dariusz Wawrzyniak, Pawel T. Wojciechowski:
Dependability Infrastructure for SOA Applications. Advanced SOA Tools and Applications 2014: 203-260
2013
[c21]
- view
  authority control:
- export record
  dblp key:
  - conf/icdcs/KobusKW13
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/icdcs/KobusKW13
Tadeusz Kobus, Maciej Kokocinski, Pawel T. Wojciechowski:
Hybrid Replication: State-Machine-Based and Deferred-Update Replication Schemes Combined. ICDCS 2013: 286-296
[c20]
- view
  authority control:
- export record
  dblp key:
  - conf/spaa/SiekW13
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/spaa/SiekW13
Konrad Siek, Pawel T. Wojciechowski:
Brief announcement: towards a fully-articulated pessimistic distributed transactional memory. SPAA 2013: 111-114
2012
[c19]
- view
  authority control:
- export record
  dblp key:
  - conf/fmics/SiekW12
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/fmics/SiekW12
Konrad Siek, Pawel T. Wojciechowski:
A Formal Design of a Tool for Static Analysis of Upper Bounds on Object Calls in Java. FMICS 2012: 192-206
[c18]
- view
  authority control:
- export record
  dblp key:
  - conf/sofsem/KobusW12
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/sofsem/KobusW12
Tadeusz Kobus, Pawel T. Wojciechowski:
RESTGroups for Resilient Web Services. SOFSEM 2012: 505-517
[c17]
- view
  authority control:
- export record
  dblp key:
  - conf/srds/WojciechowskiKK12
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/srds/WojciechowskiKK12
Pawel T. Wojciechowski, Tadeusz Kobus, Maciej Kokocinski:
Model-Driven Comparison of State-Machine-Based and Deferred-Update Replication Schemes. SRDS 2012: 101-110
2011
[c16]
- view
  - electronic edition via DOI (open access)
  - details & citations
  authority control:
- export record
  dblp key:
  - conf/icwe/KochmanWK11
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/icwe/KochmanWK11
Sebastian Kochman, Pawel T. Wojciechowski, Milosz Kmieciak:
Batched Transactions for RESTful Web Services. ICWE Workshops 2011: 86-98
[c15]
- view
  authority control:
- export record
  dblp key:
  - conf/sle/Wojciechowski11
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/sle/Wojciechowski11
Pawel T. Wojciechowski:
Typed First-Class Communication Channels and Mobility for Concurrent Scripting Languages. SLE 2011: 378-387
2010
[j2]
- view
  authority control:
- export record
  dblp key:
  - journals/toplas/SewellWU10
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/toplas/SewellWU10
Peter Sewell, Pawel T. Wojciechowski, Asis Unyapoth:
Nomadic pict: Programming languages, communication infrastructure overlays, and semantics for mobile computation. ACM Trans. Program. Lang. Syst. 32(4): 12:1-12:63 (2010)
no results

2000 – 2009

see FAQ

What is the meaning of the colors in the publication lists?

2006
[c14]
- view
  authority control:
- export record
  dblp key:
  - conf/dics/BunzliFMNRSW06
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/dics/BunzliFMNRSW06
Daniel C. Bünzli, Rachele Fuzzati, Sergio Mena, Uwe Nestmann, Olivier Rütti, André Schiper, Pawel T. Wojciechowski:
Advances in the Design and Implementation of Group Communication Middleware. Research Results of the DICS Program 2006: 172-194
[c13]
- view
  authority control:
- export record
  dblp key:
  - conf/euc/Wojciechowski06
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/euc/Wojciechowski06
Pawel T. Wojciechowski:
Scalable Message Routing for Mobile Software Assistants. EUC 2006: 355-364
[c12]
- view
  authority control:
- export record
  dblp key:
  - conf/ipps/RuttiWS06
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/ipps/RuttiWS06
Olivier Rütti, Pawel T. Wojciechowski, André Schiper:
Structural and algorithmic issues of dynamic protocol update. IPDPS 2006
[c11]
- view
  authority control:
- export record
  dblp key:
  - conf/sac/RuttiWS06
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/sac/RuttiWS06
Olivier Rütti, Pawel T. Wojciechowski, André Schiper:
Service interface: a new abstraction for implementing and composing protocols. SAC 2006: 691-696
[c10]
- view
  authority control:
- export record
  dblp key:
  - conf/soco/Wojciechowski06
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/soco/Wojciechowski06
Pawel T. Wojciechowski:
A Class-Based Object Calculus of Dynamic Binding: Reduction and Properties. SC@ETAPS 2006: 131-146
2005
[c9]
- view
  - electronic edition via DOI (open access)
  - details & citations
  authority control:
- export record
  dblp key:
  - conf/fmoods/WojciechowskiR05
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/fmoods/WojciechowskiR05
Pawel T. Wojciechowski, Olivier Rütti:
On Correctness of Dynamic Protocol Update. FMOODS 2005: 275-289
[c8]
- view
  authority control:
- export record
  dblp key:
  - conf/padl/TanasescuW05
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/padl/TanasescuW05
Vlad Tanasescu, Pawel T. Wojciechowski:
Role-Based Declarative Synchronization for Reconfigurable Systems. PADL 2005: 52-66
[c7]
- view
  authority control:
- export record
  dblp key:
  - conf/ppdp/Wojciechowski05
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/ppdp/Wojciechowski05
Pawel T. Wojciechowski:
Isolation-only transactions by typing and versioning. PPDP 2005: 70-81
2004
[c6]
- view
  authority control:
- export record
  dblp key:
  - conf/aplas/Wojciechowski04
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/aplas/Wojciechowski04
Pawel T. Wojciechowski:
Concurrency Combinators for Declarative Synchronization. APLAS 2004: 163-178
[c5]
- view
  authority control:
- export record
  dblp key:
  - conf/ipps/WojciechowskiRS04
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/ipps/WojciechowskiRS04
Pawel T. Wojciechowski, Olivier Rütti, André Schiper:
SAMOA: Framework for Synchronisation Augmented Microprotocol Approach. IPDPS 2004
2003
[c4]
- view
  authority control:
- export record
  dblp key:
  - conf/middleware/MenaSW03
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/middleware/MenaSW03
Sergio Mena, André Schiper, Pawel T. Wojciechowski:
A Step Towards a New Generation of Group Communication Systems. Middleware 2003: 414-432
2002
[c3]
- view
  authority control:
- export record
  dblp key:
  - conf/coordination/WojciechowskiMS02
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/coordination/WojciechowskiMS02
Pawel T. Wojciechowski, Sergio Mena, André Schiper:
Semantics of Protocol Modules Composition and Interaction. COORDINATION 2002: 389-404
2000
[b1]
- view
  - electronic edition @ bl.uk
  - details & citations
- export record
  dblp key:
  - phd/ethos/Wojciechowski00
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/phd/ethos/Wojciechowski00
Pawel T. Wojciechowski:
Nomadic pict: language and infrastructure design for mobile computation. University of Cambridge, UK, 2000
[j1]
- view
  authority control:
- export record
  dblp key:
  - journals/ieeecc/WojciechowskiS00
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/ieeecc/WojciechowskiS00
Pawel T. Wojciechowski, Peter Sewell:
Nomadic Pict: language and infrastructure design for mobile agents. IEEE Concurr. 8(2): 42-52 (2000)
no results

1990 – 1999

see FAQ

What is the meaning of the colors in the publication lists?

1999
[c2]
- view
  authority control:
- export record
  dblp key:
  - conf/ma/WojciechowskiS99
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/ma/WojciechowskiS99
Pawel T. Wojciechowski, Peter Sewell:
Nomadic Pict: Language and Infrastructure Design for Mobile Agents. ASA/MA 1999: 2-12
1998
[c1]
- view
  authority control:
- export record
  dblp key:
  - conf/iccl/SewellWP98
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/iccl/SewellWP98
Peter Sewell, Pawel T. Wojciechowski, Benjamin C. Pierce:
Location-Independent Communication for Mobile Agents: A Two-Level Architecture. ICCL Workshop: Internet Programming Languages 1998: 1-31
no results

[+]

Coauthor network

[+]

Coauthor Index

see FAQ

manage site settings

To protect your privacy, all features that rely on external API calls from your browser are turned off by default. You need to opt-in for them to become active. All settings here will be stored as cookies with your web browser. For more information see our F.A.Q.