Please note that LibreCat no longer supports Internet Explorer versions 8 or 9 (or earlier).
We recommend upgrading to the latest Internet Explorer, Google Chrome, or Firefox.
5711 Publications
2011 | Conference Paper | LibreCat-ID: 11999
Simulative performance evaluation of the simTD Self Organizing Traffic Information System
D. Eckhoff, T. Gansen, R. Manz, D. Thum, O. Klages, C. Sommer, in: 2011 The 10th IFIP Annual Mediterranean Ad Hoc Networking Workshop, 2011.
LibreCat
| DOI
D. Eckhoff, T. Gansen, R. Manz, D. Thum, O. Klages, C. Sommer, in: 2011 The 10th IFIP Annual Mediterranean Ad Hoc Networking Workshop, 2011.
2011 | Journal Article | LibreCat-ID: 12000
SlotSwap: strong and affordable location privacy in intelligent transportation systems
D. Eckhoff, R. German, C. Sommer, F. Dressler, T. Gansen, IEEE Communications Magazine (2011) 126–133.
LibreCat
| DOI
D. Eckhoff, R. German, C. Sommer, F. Dressler, T. Gansen, IEEE Communications Magazine (2011) 126–133.
2011 | Conference Paper | LibreCat-ID: 12056
Adaptive beaconing for delay-sensitive and congestion-aware traffic information systems
C. Sommer, O.K. Tonguz, F. Dressler, in: 2010 IEEE Vehicular Networking Conference, 2011.
LibreCat
| DOI
C. Sommer, O.K. Tonguz, F. Dressler, in: 2010 IEEE Vehicular Networking Conference, 2011.
2011 | Conference Paper | LibreCat-ID: 12062
A computationally inexpensive empirical model of IEEE 802.11p radio shadowing in urban environments
C. Sommer, D. Eckhoff, R. German, F. Dressler, in: 2011 Eighth International Conference on Wireless On-Demand Network Systems and Services, 2011.
LibreCat
| DOI
C. Sommer, D. Eckhoff, R. German, F. Dressler, in: 2011 Eighth International Conference on Wireless On-Demand Network Systems and Services, 2011.
2011 | Journal Article | LibreCat-ID: 12063
Traffic information systems: efficient message dissemination via adaptive beaconing
C. Sommer, O. Tonguz, F. Dressler, IEEE Communications Magazine (2011) 173–179.
LibreCat
| DOI
C. Sommer, O. Tonguz, F. Dressler, IEEE Communications Magazine (2011) 173–179.
2011 | Conference Paper | LibreCat-ID: 15672
Analysis of code reading to gain more insight in program comprehension
T. Busjahn, C. Schulte, A. Busjahn, in: Koli Calling, ACM, 2011, pp. 1–9.
LibreCat
T. Busjahn, C. Schulte, A. Busjahn, in: Koli Calling, ACM, 2011, pp. 1–9.
2011 | Conference Paper | LibreCat-ID: 15673
ProspectiveTeachers@Research: CS teacher education revised
M. Hornung, C. Schulte, in: Koli Calling, ACM, 2011, pp. 138–143.
LibreCat
M. Hornung, C. Schulte, in: Koli Calling, ACM, 2011, pp. 138–143.
2011 | Conference Paper | LibreCat-ID: 15674
Informatik begreifen - Zur Nutzung von Veranschaulichungen im Informatikunterricht
M. Kalbitz, H. Voss, C. Schulte, in: INFOS, GI, 2011, pp. 137–146.
LibreCat
M. Kalbitz, H. Voss, C. Schulte, in: INFOS, GI, 2011, pp. 137–146.
2011 | Conference Paper | LibreCat-ID: 15675
Das Schülerlabor als Ort der Informatiklehrerbildung
C. Schulte, in: INFOS, GI, 2011, pp. 47–56.
LibreCat
C. Schulte, in: INFOS, GI, 2011, pp. 47–56.
2011 | Conference Paper | LibreCat-ID: 15762
Joint mode estimation in multi-label classification by chaining
K. Dembczynski, W. Waegeman, E. Hüllermeier, in: In Proceedings ECML Workshop on Collective Inference and Learning on Structured Data, Athens, Greece, 2011.
LibreCat
K. Dembczynski, W. Waegeman, E. Hüllermeier, in: In Proceedings ECML Workshop on Collective Inference and Learning on Structured Data, Athens, Greece, 2011.
2011 | Conference Paper | LibreCat-ID: 15764
Prediction of protein localization for specialized compartments using time series kernels
M. Mernberger, D. Moog, S. Stork, S. Zauner, U. Maier, E. Hüllermeier, in: In Proceedings GCB-2011 German Conference on Bioinformatics Munich, Germany, 2011.
LibreCat
M. Mernberger, D. Moog, S. Stork, S. Zauner, U. Maier, E. Hüllermeier, in: In Proceedings GCB-2011 German Conference on Bioinformatics Munich, Germany, 2011.
2011 | Conference Paper | LibreCat-ID: 15046
Volume Studio: Flexible Multi-Volume Ray Casting Pipeline mit nahtlos integriertem Rapid Prototyping von Shadern.
S. Arens, G. Domik, in: INFORMATIK 2011 – 41. Jahrestagung Der Gesellschaft Für Informatik., Gesellschaft für Informatik e.V., Bonn, 2011, pp. 347–352.
LibreCat
S. Arens, G. Domik, in: INFORMATIK 2011 – 41. Jahrestagung Der Gesellschaft Für Informatik., Gesellschaft für Informatik e.V., Bonn, 2011, pp. 347–352.
2011 | Conference Paper | LibreCat-ID: 15097
Mixing Bottom-Up and Top-Down XPath Query Evaluation
M. Benter, S. Böttcher, R. Hartel, in: East European Conference on Advances in Databases and Information Systems, Springer, 2011, pp. 27–41.
LibreCat
| DOI
M. Benter, S. Böttcher, R. Hartel, in: East European Conference on Advances in Databases and Information Systems, Springer, 2011, pp. 27–41.
2011 | Conference Paper | LibreCat-ID: 15099
Updates on Grammar-Compressed XML Data
A. Bätz, S. Böttcher, R. Hartel, in: Advances in Databases - 28th British National Conference on Databases, BNCOD 28, Revised Selected Papers, Springer, 2011, pp. 154–166.
LibreCat
| DOI
A. Bätz, S. Böttcher, R. Hartel, in: Advances in Databases - 28th British National Conference on Databases, BNCOD 28, Revised Selected Papers, Springer, 2011, pp. 154–166.
2011 | Conference Paper | LibreCat-ID: 15100
TraCX: Transformation of Compressed XML
S. Böttcher, R. Hartel, S. Stey, in: Advances in Databases - 28th British National Conference on Databases, BNCOD 28, Revised Selected Papers, Springer, 2011, pp. 182–193.
LibreCat
| DOI
S. Böttcher, R. Hartel, S. Stey, in: Advances in Databases - 28th British National Conference on Databases, BNCOD 28, Revised Selected Papers, Springer, 2011, pp. 182–193.
2011 | Conference Paper | LibreCat-ID: 15102
Search and Modification in Compressed Texts
S. Böttcher, A. Bültmann, R. Hartel, in: 2011 Data Compression Conference, IEEE, 2011, pp. 403–412.
LibreCat
| DOI
S. Böttcher, A. Bültmann, R. Hartel, in: 2011 Data Compression Conference, IEEE, 2011, pp. 403–412.
2011 | Conference Paper | LibreCat-ID: 15103
Enhancing XML-cache Efficiency by XML Compression
S. Böttcher, L. Fernhomberg, R. Hartel, in: WEBIST 2011, Proceedings of the 7th International Conference on Web Information Systems and Technologies, SciTePress, 2011, pp. 80–87.
LibreCat
S. Böttcher, L. Fernhomberg, R. Hartel, in: WEBIST 2011, Proceedings of the 7th International Conference on Web Information Systems and Technologies, SciTePress, 2011, pp. 80–87.
2011 | Conference Paper | LibreCat-ID: 15104
Reducing Data Transfer by Combining XML-Compression and XML-Caching
S. Böttcher, L. Fernhomberg, R. Hartel, in: Web Information Systems and Technologies - 7th International Conference, WEBIST 2011, Revised Selected Papers, Springer, 2011, pp. 116–130.
LibreCat
| DOI
S. Böttcher, L. Fernhomberg, R. Hartel, in: Web Information Systems and Technologies - 7th International Conference, WEBIST 2011, Revised Selected Papers, Springer, 2011, pp. 116–130.
2011 | Conference Paper | LibreCat-ID: 15115
Comparing methods for knowledge-driven and data-driven fuzzy modeling: A case study in textile industry
M. Nasiri, E. Hüllermeier, R. Senge, E. Lughofer, in: In Proceedings IFSA-2011 World Congress of the International Fuzzy Systems Association, Surabaya and Bali Island, Indonesia, 2011, p. RW-103-1-6.
LibreCat
M. Nasiri, E. Hüllermeier, R. Senge, E. Lughofer, in: In Proceedings IFSA-2011 World Congress of the International Fuzzy Systems Association, Surabaya and Bali Island, Indonesia, 2011, p. RW-103-1-6.
2011 | Conference Paper | LibreCat-ID: 15116
On-line redundancy deletion in evolving fuzzy regression models using a fuzzy inclusion measure
E. Lughofer, E. Hüllermeier, in: S. Galichet, J. Montero, G. Mauris (Eds.), In Proceedings EUSFLAT-2011 7th International Conference on the European Society for Fuzzy Logic and Technology, Aix-Les-Bains, France, 2011, pp. 380–387.
LibreCat
E. Lughofer, E. Hüllermeier, in: S. Galichet, J. Montero, G. Mauris (Eds.), In Proceedings EUSFLAT-2011 7th International Conference on the European Society for Fuzzy Logic and Technology, Aix-Les-Bains, France, 2011, pp. 380–387.
2011 | Conference Paper | LibreCat-ID: 15117
Choquistic regression: Generalizing logistic regression using the Choquet integral
A. Fallah Tehrani, W. Cheng, E. Hüllermeier, in: In Proceedings EUSFLAT-2011 7th International Conference on the European Society for Fuzzy Logic and Technology, Aix-Les-Bains, France, 2011, pp. 868–875.
LibreCat
A. Fallah Tehrani, W. Cheng, E. Hüllermeier, in: In Proceedings EUSFLAT-2011 7th International Conference on the European Society for Fuzzy Logic and Technology, Aix-Les-Bains, France, 2011, pp. 868–875.
2011 | Book Chapter | LibreCat-ID: 15127
Transdisciplinary collaboration and lifelong learning: fostering and supporting new learning opportunities
G. Domik, G. Fischer, in: Rainbow of Computer Science, Springer, 2011, pp. 129–143.
LibreCat
| DOI
G. Domik, G. Fischer, in: Rainbow of Computer Science, Springer, 2011, pp. 129–143.
2011 | Conference Abstract | LibreCat-ID: 15181
Namenlemmatisierung in der Web-Datenbank mittelalterlicher und frühneuzeitlicher Universitätsmatrikel
S. Böttcher, R. Hartel, H. Hawicks, in: XXIV ICOS Internationales Kongress Für Namensforschung, 2011.
LibreCat
S. Böttcher, R. Hartel, H. Hawicks, in: XXIV ICOS Internationales Kongress Für Namensforschung, 2011.
2011 | Conference Paper | LibreCat-ID: 15193
How useful is computer graphics for medical diagnoses?
G. Domik, S. Arens, I. Scharlau, F. Hilkenmeier, in: INFORMATIK 2011 – Informatik Schafft Communities, Gesellschaft für Informatik e.V., Bonn, 2011, p. 437.
LibreCat
G. Domik, S. Arens, I. Scharlau, F. Hilkenmeier, in: INFORMATIK 2011 – Informatik Schafft Communities, Gesellschaft für Informatik e.V., Bonn, 2011, p. 437.
2011 | Journal Article | LibreCat-ID: 16119
Multivariate modeling to identify patterns in clinical data: The example of chest pain
O. Hirsch, S. Bösner, E. Hüllermeier, R. Senge, K. Dembczynski, N. Donner-Banzhoff, BMC Medical Research Methodology 11 (2011).
LibreCat
O. Hirsch, S. Bösner, E. Hüllermeier, R. Senge, K. Dembczynski, N. Donner-Banzhoff, BMC Medical Research Methodology 11 (2011).
2011 | Journal Article | LibreCat-ID: 16126
Preferences in AL: An overview
C. Domshlak, E. Hüllermeier, S. Kaci, H. Prade, Artificial Intelligence 175 (2011) 1037–1052.
LibreCat
C. Domshlak, E. Hüllermeier, S. Kaci, H. Prade, Artificial Intelligence 175 (2011) 1037–1052.
2011 | Journal Article | LibreCat-ID: 16147
Fuzzy machine learning and data mining
E. Hüllermeier, WIREs Data Mining and Knowledge Discovery 1 (2011) 269–283.
LibreCat
E. Hüllermeier, WIREs Data Mining and Knowledge Discovery 1 (2011) 269–283.
2011 | Journal Article | LibreCat-ID: 16148
SEGA: Semi-global graph alignment for structure-based protein comparison
M. Mernberger, G. Klebe, E. Hüllermeier, IEEE/ACM Transactions of Computational Biology and Bioinformatics 8 (2011) 1330–1343.
LibreCat
M. Mernberger, G. Klebe, E. Hüllermeier, IEEE/ACM Transactions of Computational Biology and Bioinformatics 8 (2011) 1330–1343.
2011 | Journal Article | LibreCat-ID: 16149
Superposition and alignment of labeled point clouds
T. Fober, S. Glinca, G. Klebe, E. Hüllermeier, IEEE/ACM Transactions on Computational Biology and Bioinformatics 8 (2011) 1653–1666.
LibreCat
T. Fober, S. Glinca, G. Klebe, E. Hüllermeier, IEEE/ACM Transactions on Computational Biology and Bioinformatics 8 (2011) 1653–1666.
2011 | Journal Article | LibreCat-ID: 1615
Load Balancing in P2P Networks: Using Statistics to Fight Data and Execution Skew
D. Warneke, C. Dannewitz, Journal of Advances in Information Technology 2 (2011).
LibreCat
| DOI
D. Warneke, C. Dannewitz, Journal of Advances in Information Technology 2 (2011).
2011 | Journal Article | LibreCat-ID: 16150
Fuzzy sets in machine learning and data mining
E. Hüllermeier, Applied Soft Computing Journal (2011) 1493–1505.
LibreCat
E. Hüllermeier, Applied Soft Computing Journal (2011) 1493–1505.
2011 | Journal Article | LibreCat-ID: 16153
Top-down induction of fuzzy pattern trees
R. Senge, E. Hüllermeier, IEEE Transactions on Fuzzy Systems 19 (2011) 241–252.
LibreCat
R. Senge, E. Hüllermeier, IEEE Transactions on Fuzzy Systems 19 (2011) 241–252.
2011 | Book Chapter | LibreCat-ID: 16409
A New Approach for Analyzing Convergence Algorithms for Mobile Robots
A. Cord-Landwehr, B. Degener, M. Fischer, M. Hüllmann, B. Kempkes, A. Klaas, P. Kling, S. Kurras, M. Märtens, F. Meyer auf der Heide, C. Raupach, K. Swierkot, D. Warner, C. Weddemann, D. Wonisch, in: Automata, Languages and Programming, Berlin, Heidelberg, 2011.
LibreCat
| DOI
A. Cord-Landwehr, B. Degener, M. Fischer, M. Hüllmann, B. Kempkes, A. Klaas, P. Kling, S. Kurras, M. Märtens, F. Meyer auf der Heide, C. Raupach, K. Swierkot, D. Warner, C. Weddemann, D. Wonisch, in: Automata, Languages and Programming, Berlin, Heidelberg, 2011.
2011 | Conference Paper | LibreCat-ID: 13194
An exact algorithm for F-measure maximization
K. Dembczynski, W. Waegeman, W. Cheng, E. Hüllermeier, in: In Proceedings NIPS-2011, 25th Annual Conference on Neural Information Processing Systems, Granada, Spain, 2011.
LibreCat
K. Dembczynski, W. Waegeman, W. Cheng, E. Hüllermeier, in: In Proceedings NIPS-2011, 25th Annual Conference on Neural Information Processing Systems, Granada, Spain, 2011.
2011 | Conference Paper | LibreCat-ID: 13196
Learning from label preferences
J. Fürnkranz, E. Hüllermeier, in: T. Elomaa, J. Hollmen, H. Mannila (Eds.), In Proceedings DS-2011, 14th International Conference on Discovery Science, Number 6926 in LNAI, Springer, 2011, pp. 2–17.
LibreCat
J. Fürnkranz, E. Hüllermeier, in: T. Elomaa, J. Hollmen, H. Mannila (Eds.), In Proceedings DS-2011, 14th International Conference on Discovery Science, Number 6926 in LNAI, Springer, 2011, pp. 2–17.
2011 | Conference Paper | LibreCat-ID: 13197
Learning monotone nonlinear models using the Choquet integral
A. Fallah Tehrani, W. Cheng, K. Dembczynski, E. Hüllermeier, in: In Proceedings ECML/PKDD-2011, European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases, Athens, Greece, 2011.
LibreCat
A. Fallah Tehrani, W. Cheng, K. Dembczynski, E. Hüllermeier, in: In Proceedings ECML/PKDD-2011, European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases, Athens, Greece, 2011.
2011 | Conference Paper | LibreCat-ID: 13198
Preference-based CBR: First steps toward a methodological framework
E. Hüllermeier, P. Schlegel, in: A. Ram, N. Wiratunga (Eds.), In Proceedings ICCBR-2011, 19th International Conference on Case-Based Reasoning, Number 6880 in LNAI, Springer, 2011, pp. 77–91.
LibreCat
E. Hüllermeier, P. Schlegel, in: A. Ram, N. Wiratunga (Eds.), In Proceedings ICCBR-2011, 19th International Conference on Case-Based Reasoning, Number 6880 in LNAI, Springer, 2011, pp. 77–91.
2011 | Conference Paper | LibreCat-ID: 13588
Bipartite ranking through minimization of univariate loss
W. Kotlowski, K. Dembczynski, E. Hüllermeier, in: In Proceedings ICML-2011, 28th International Conference on Machine Learning, Washington, USA, 2011.
LibreCat
W. Kotlowski, K. Dembczynski, E. Hüllermeier, in: In Proceedings ICML-2011, 28th International Conference on Machine Learning, Washington, USA, 2011.
2011 | Conference Paper | LibreCat-ID: 13643
Memory Virtualization for Multithreaded Reconfigurable Hardware
A. Agne, M. Platzner, E. Lübbers, in: Proceedings of the International Conference on Field Programmable Logic and Applications (FPL), IEEE, 2011, pp. 185–188.
LibreCat
| DOI
A. Agne, M. Platzner, E. Lübbers, in: Proceedings of the International Conference on Field Programmable Logic and Applications (FPL), IEEE, 2011, pp. 185–188.
2011 | Conference Paper | LibreCat-ID: 13644
Design and architectures for dependable embedded systems
J. Henkel, L. Hedrich, A. Herkersdorf, R. Kapitza, D. Lohmann, P. Marwedel, M. Platzner, W. Rosenstiel, U. Schlichtmann, O. Spinczyk, M. Tahoori, L. Bauer, J. Teich, N. Wehn, H.-J. Wunderlich, J. Becker, O. Bringmann, U. Brinkschulte, S. Chakraborty, M. Engel, R. Ernst, H. Härtig, in: Proceedings of the Seventh IEEE/ACM/IFIP International Conference on Hardware/Software Codesign and System Synthesis - CODES+ISSS ’11, 2011.
LibreCat
| DOI
J. Henkel, L. Hedrich, A. Herkersdorf, R. Kapitza, D. Lohmann, P. Marwedel, M. Platzner, W. Rosenstiel, U. Schlichtmann, O. Spinczyk, M. Tahoori, L. Bauer, J. Teich, N. Wehn, H.-J. Wunderlich, J. Becker, O. Bringmann, U. Brinkschulte, S. Chakraborty, M. Engel, R. Ernst, H. Härtig, in: Proceedings of the Seventh IEEE/ACM/IFIP International Conference on Hardware/Software Codesign and System Synthesis - CODES+ISSS ’11, 2011.
2011 | Journal Article | LibreCat-ID: 1376
Complex Queries in P2P Networks with Resource-Constrained Devices
C. Dannewitz, T. Biermann, M. Dräxler, H. Karl, Journal of Advances in Information Technology 2 (2011).
LibreCat
| DOI
C. Dannewitz, T. Biermann, M. Dräxler, H. Karl, Journal of Advances in Information Technology 2 (2011).
2011 | Conference Paper | LibreCat-ID: 37001
Virtual Prototyping software-intensiver mechatronischer Systeme - Eine Fallstudie
M. Becker, H. Zabel, W. Müller, A. Elfeky, in: Paderborn, 2011.
LibreCat
M. Becker, H. Zabel, W. Müller, A. Elfeky, in: Paderborn, 2011.
2011 | Conference Paper | LibreCat-ID: 37005
A SystemC Based Library for Functional Coverage
C. Kuznik, W. Müller, in: 2011.
LibreCat
C. Kuznik, W. Müller, in: 2011.
2011 | Conference Paper | LibreCat-ID: 37006
A Reconfiguration Approach for Faul-Tolerant FlexRay Networks
K. Klobedanz, A. König, W. Müller, in: Proceedings of DATE’11, IEEE, Grenoble, France, 2011.
LibreCat
| DOI
K. Klobedanz, A. König, W. Müller, in: Proceedings of DATE’11, IEEE, Grenoble, France, 2011.
2011 | Journal Article | LibreCat-ID: 8178 | 
Characterizing Quantumness via Entanglement Creation
S. Gharibian, M. PIANI, G. ADESSO, J. CALSAMIGLIA, P. HORODECKI, International Journal of Quantum Information 09 (2011) 1701–1713.
LibreCat
| DOI
| Download (ext.)
| arXiv
S. Gharibian, M. PIANI, G. ADESSO, J. CALSAMIGLIA, P. HORODECKI, International Journal of Quantum Information 09 (2011) 1701–1713.
2011 | Conference Paper | LibreCat-ID: 8176 |
Approximation Algorithms for QMA-Complete Problems
S. Gharibian, J. Kempe, in: IEEE Annual Conference on Computational Complexity (CCC 2011), IEEE, 2011.
LibreCat
| DOI
| Download (ext.)
| arXiv
S. Gharibian, J. Kempe, in: IEEE Annual Conference on Computational Complexity (CCC 2011), IEEE, 2011.
2011 | Journal Article | LibreCat-ID: 8177 |
All Nonclassical Correlations Can Be Activated into Distillable Entanglement
M. Piani, S. Gharibian, G. Adesso, J. Calsamiglia, P. Horodecki, A. Winter, Physical Review Letters 106 (2011).
LibreCat
| DOI
| Download (ext.)
| arXiv
M. Piani, S. Gharibian, G. Adesso, J. Calsamiglia, P. Horodecki, A. Winter, Physical Review Letters 106 (2011).
2011 | Conference Paper | LibreCat-ID: 2194
Transformation of scientific algorithms to parallel computing code: subdomain support in a MPI-multi-GPU backend
B. Meyer, C. Plessl, J. Förstner, in: Symp. on Application Accelerators in High Performance Computing (SAAHPC), IEEE Computer Society, 2011, pp. 60–63.
LibreCat
| DOI
B. Meyer, C. Plessl, J. Förstner, in: Symp. on Application Accelerators in High Performance Computing (SAAHPC), IEEE Computer Society, 2011, pp. 60–63.
2011 | Conference Paper | LibreCat-ID: 2193
Cooperative multitasking for heterogeneous accelerators in the Linux Completely Fair Scheduler
T. Beisel, T. Wiersema, C. Plessl, A. Brinkmann, in: Proc. Int. Conf. on Application-Specific Systems, Architectures, and Processors (ASAP), IEEE Computer Society, 2011, pp. 223–226.
LibreCat
| DOI
T. Beisel, T. Wiersema, C. Plessl, A. Brinkmann, in: Proc. Int. Conf. on Application-Specific Systems, Architectures, and Processors (ASAP), IEEE Computer Society, 2011, pp. 223–226.
2011 | Conference Paper | LibreCat-ID: 656
Measuring and Predicting Temperature Distributions on FPGAs at Run-Time
M. Happe, A. Agne, C. Plessl, in: Proceedings of the 2011 International Conference on Reconfigurable Computing and FPGAs (ReConFig), IEEE, 2011, pp. 55–60.
LibreCat
| Files available
| DOI
M. Happe, A. Agne, C. Plessl, in: Proceedings of the 2011 International Conference on Reconfigurable Computing and FPGAs (ReConFig), IEEE, 2011, pp. 55–60.