---
_id: '20383'
author:
- first_name: R
full_name: Jäger, R
last_name: Jäger
- first_name: M
full_name: Purpura, M
last_name: Purpura
- first_name: KR
full_name: Geiss, KR
last_name: Geiss
- first_name: M
full_name: Weiß, M
last_name: Weiß
- first_name: Jochen
full_name: Baumeister, Jochen
id: '46'
last_name: Baumeister
orcid: 0000-0003-2683-5826
- first_name: F
full_name: Amatulli, F
last_name: Amatulli
- first_name: L
full_name: Schröder, L
last_name: Schröder
- first_name: H
full_name: Herwegen, H
last_name: Herwegen
citation:
ama: Jäger R, Purpura M, Geiss K, et al. The effect of phosphatidylserine on golf
performance. J Int Soc Sports Nutr. 2007;4:23. doi:10.1186/1550-2783-4-23
apa: Jäger, R., Purpura, M., Geiss, K., Weiß, M., Baumeister, J., Amatulli, F.,
… Herwegen, H. (2007). The effect of phosphatidylserine on golf performance. J
Int Soc Sports Nutr, 4, 23. https://doi.org/10.1186/1550-2783-4-23
bibtex: '@article{Jäger_Purpura_Geiss_Weiß_Baumeister_Amatulli_Schröder_Herwegen_2007,
title={The effect of phosphatidylserine on golf performance.}, volume={4}, DOI={10.1186/1550-2783-4-23}, journal={J
Int Soc Sports Nutr}, author={Jäger, R and Purpura, M and Geiss, KR and Weiß,
M and Baumeister, Jochen and Amatulli, F and Schröder, L and Herwegen, H}, year={2007},
pages={23} }'
chicago: 'Jäger, R, M Purpura, KR Geiss, M Weiß, Jochen Baumeister, F Amatulli,
L Schröder, and H Herwegen. “The Effect of Phosphatidylserine on Golf Performance.”
J Int Soc Sports Nutr 4 (2007): 23. https://doi.org/10.1186/1550-2783-4-23.'
ieee: R. Jäger et al., “The effect of phosphatidylserine on golf performance.,”
J Int Soc Sports Nutr, vol. 4, p. 23, 2007.
mla: Jäger, R., et al. “The Effect of Phosphatidylserine on Golf Performance.” J
Int Soc Sports Nutr, vol. 4, 2007, p. 23, doi:10.1186/1550-2783-4-23.
short: R. Jäger, M. Purpura, K. Geiss, M. Weiß, J. Baumeister, F. Amatulli, L. Schröder,
H. Herwegen, J Int Soc Sports Nutr 4 (2007) 23.
date_created: 2020-11-18T12:43:47Z
date_updated: 2022-01-06T06:54:26Z
department:
- _id: '17'
- _id: '172'
doi: 10.1186/1550-2783-4-23
external_id:
pmid:
- '18053194'
intvolume: ' 4'
language:
- iso: eng
page: '23'
pmid: '1'
publication: J Int Soc Sports Nutr
publication_identifier:
issn:
- 1550-2783
status: public
title: The effect of phosphatidylserine on golf performance.
type: journal_article
user_id: '62406'
volume: 4
year: '2007'
...
---
_id: '20431'
author:
- first_name: Heiko
full_name: Hamann, Heiko
last_name: Hamann
- first_name: Heinz
full_name: Wörn, Heinz
last_name: Wörn
- first_name: Erol
full_name: Sahin, Erol
last_name: Sahin
- first_name: Winfield
full_name: Spears, Winfield
last_name: Spears
- first_name: Winfield
full_name: Winfield, Winfield
last_name: Winfield
citation:
ama: 'Hamann H, Wörn H, Sahin E, Spears W, Winfield W. An analytical and spatial
model of foraging in a swarm of robots. In: Swarm Robotics - Second SAB 2006
International Workshop. Vol 4433. ; 2007:43--55. doi:10.1007/978-3-540-71541-2_4'
apa: Hamann, H., Wörn, H., Sahin, E., Spears, W., & Winfield, W. (2007). An
analytical and spatial model of foraging in a swarm of robots. In Swarm Robotics
- Second SAB 2006 International Workshop (Vol. 4433, pp. 43--55). https://doi.org/10.1007/978-3-540-71541-2_4
bibtex: '@inproceedings{Hamann_Wörn_Sahin_Spears_Winfield_2007, title={An analytical
and spatial model of foraging in a swarm of robots}, volume={4433}, DOI={10.1007/978-3-540-71541-2_4},
booktitle={Swarm Robotics - Second SAB 2006 International Workshop}, author={Hamann,
Heiko and Wörn, Heinz and Sahin, Erol and Spears, Winfield and Winfield, Winfield},
year={2007}, pages={43--55} }'
chicago: Hamann, Heiko, Heinz Wörn, Erol Sahin, Winfield Spears, and Winfield Winfield.
“An Analytical and Spatial Model of Foraging in a Swarm of Robots.” In Swarm
Robotics - Second SAB 2006 International Workshop, 4433:43--55, 2007. https://doi.org/10.1007/978-3-540-71541-2_4.
ieee: H. Hamann, H. Wörn, E. Sahin, W. Spears, and W. Winfield, “An analytical and
spatial model of foraging in a swarm of robots,” in Swarm Robotics - Second
SAB 2006 International Workshop, 2007, vol. 4433, pp. 43--55.
mla: Hamann, Heiko, et al. “An Analytical and Spatial Model of Foraging in a Swarm
of Robots.” Swarm Robotics - Second SAB 2006 International Workshop, vol.
4433, 2007, pp. 43--55, doi:10.1007/978-3-540-71541-2_4.
short: 'H. Hamann, H. Wörn, E. Sahin, W. Spears, W. Winfield, in: Swarm Robotics
- Second SAB 2006 International Workshop, 2007, pp. 43--55.'
date_created: 2020-11-19T11:22:26Z
date_updated: 2022-01-06T06:54:27Z
department:
- _id: '63'
- _id: '238'
doi: 10.1007/978-3-540-71541-2_4
intvolume: ' 4433'
language:
- iso: eng
page: 43--55
publication: Swarm Robotics - Second SAB 2006 International Workshop
status: public
title: An analytical and spatial model of foraging in a swarm of robots
type: conference
user_id: '15415'
volume: 4433
year: '2007'
...
---
_id: '20432'
abstract:
- lang: eng
text: Designing and implementing artificial self-organizing systems is a challenging
task since they typically behave non- intuitive and only little theoretical foundations
exist. Predicting a system of many components with a huge amount of interactions
is beyond human skills. The currently common use of simulations for design support
is not satisfying, as it is time-consuming and the results are most likely sub-
optimal. In this work, we present the derivation of an analytical, time-, and
space-continuous model for a swarm of autonomous robots based on the Fokker-Planck
equation. While the motion model is in most parts physically motivated, the communication
model is based on a heuristic approach. A showcase application to a recently proposed
scenario of collective perception in a huge swarm of robots with very limited
abilities is given and the simulation results are compared to the model. Despite
the high level of abstraction, the prediction discrepancies are small and the
parameters can be mapped one-to-one from the model to the control algorithm. Finally,
we give an outlook on the capabilities of the proposed model, discuss its limitations,
and suggest an improvement that could reduce the number of empirically determined
parameters.
author:
- first_name: Heiko
full_name: Hamann, Heiko
last_name: Hamann
- first_name: Heinz
full_name: Wörn, Heinz
last_name: Wörn
citation:
ama: 'Hamann H, Wörn H. A Space- and Time-Continuous Model of Self-Organizing Robot
Swarms for Design Support. In: First International Conference on Self-Adaptive
and Self-Organizing Systems (SASO 2007). ; 2007:23--31. doi:10.1109/saso.2007.3'
apa: Hamann, H., & Wörn, H. (2007). A Space- and Time-Continuous Model of Self-Organizing
Robot Swarms for Design Support. In First International Conference on Self-Adaptive
and Self-Organizing Systems (SASO 2007) (pp. 23--31). https://doi.org/10.1109/saso.2007.3
bibtex: '@inproceedings{Hamann_Wörn_2007, title={A Space- and Time-Continuous Model
of Self-Organizing Robot Swarms for Design Support}, DOI={10.1109/saso.2007.3},
booktitle={First International Conference on Self-Adaptive and Self-Organizing
Systems (SASO 2007)}, author={Hamann, Heiko and Wörn, Heinz}, year={2007}, pages={23--31}
}'
chicago: Hamann, Heiko, and Heinz Wörn. “A Space- and Time-Continuous Model of Self-Organizing
Robot Swarms for Design Support.” In First International Conference on Self-Adaptive
and Self-Organizing Systems (SASO 2007), 23--31, 2007. https://doi.org/10.1109/saso.2007.3.
ieee: H. Hamann and H. Wörn, “A Space- and Time-Continuous Model of Self-Organizing
Robot Swarms for Design Support,” in First International Conference on Self-Adaptive
and Self-Organizing Systems (SASO 2007), 2007, pp. 23--31.
mla: Hamann, Heiko, and Heinz Wörn. “A Space- and Time-Continuous Model of Self-Organizing
Robot Swarms for Design Support.” First International Conference on Self-Adaptive
and Self-Organizing Systems (SASO 2007), 2007, pp. 23--31, doi:10.1109/saso.2007.3.
short: 'H. Hamann, H. Wörn, in: First International Conference on Self-Adaptive
and Self-Organizing Systems (SASO 2007), 2007, pp. 23--31.'
date_created: 2020-11-19T11:24:11Z
date_updated: 2022-01-06T06:54:27Z
department:
- _id: '63'
- _id: '238'
doi: 10.1109/saso.2007.3
language:
- iso: eng
page: 23--31
publication: First International Conference on Self-Adaptive and Self-Organizing Systems
(SASO 2007)
publication_identifier:
isbn:
- '0769529062'
publication_status: published
status: public
title: A Space- and Time-Continuous Model of Self-Organizing Robot Swarms for Design
Support
type: conference
user_id: '15415'
year: '2007'
...
---
_id: '20433'
author:
- first_name: Heiko
full_name: Hamann, Heiko
last_name: Hamann
- first_name: Heinz
full_name: Wörn, Heinz
last_name: Wörn
- first_name: Marius
full_name: Nagy, Marius
last_name: Nagy
- first_name: Naya
full_name: Nagy, Naya
last_name: Nagy
citation:
ama: Hamann H, Wörn H, Nagy M, Nagy N. Embodied Computation. Parallel Processing
Letters. 2007;17(3):287--298.
apa: Hamann, H., Wörn, H., Nagy, M., & Nagy, N. (2007). Embodied Computation.
Parallel Processing Letters, 17(3), 287--298.
bibtex: '@article{Hamann_Wörn_Nagy_Nagy_2007, title={Embodied Computation}, volume={17},
number={3}, journal={Parallel Processing Letters}, author={Hamann, Heiko and Wörn,
Heinz and Nagy, Marius and Nagy, Naya}, year={2007}, pages={287--298} }'
chicago: 'Hamann, Heiko, Heinz Wörn, Marius Nagy, and Naya Nagy. “Embodied Computation.”
Parallel Processing Letters 17, no. 3 (2007): 287--298.'
ieee: H. Hamann, H. Wörn, M. Nagy, and N. Nagy, “Embodied Computation,” Parallel
Processing Letters, vol. 17, no. 3, pp. 287--298, 2007.
mla: Hamann, Heiko, et al. “Embodied Computation.” Parallel Processing Letters,
vol. 17, no. 3, 2007, pp. 287--298.
short: H. Hamann, H. Wörn, M. Nagy, N. Nagy, Parallel Processing Letters 17 (2007)
287--298.
date_created: 2020-11-19T11:32:32Z
date_updated: 2022-01-06T06:54:27Z
department:
- _id: '63'
- _id: '238'
intvolume: ' 17'
issue: '3'
language:
- iso: eng
page: 287--298
publication: Parallel Processing Letters
status: public
title: Embodied Computation
type: journal_article
user_id: '15415'
volume: 17
year: '2007'
...
---
_id: '20434'
abstract:
- lang: eng
text: 'Current research in Micro, Nano and Swarm Robots as results of the European
projects Miniman, MiCRoN and I-SWARM will be presented. First, the design and
the control of 5 to 10cm3 sized mobile micro robots with five degrees of freedom
will be shown. They can handle miniaturized parts as for example an optical component
or a biological cell with a size in the micrometre-area with an accuracy of 100nm
under a microscope or a raster-electron microscope. Second, the design and the
control of a 1cm3-sized mobile untethered micro robot will be demonstrated. Here,
the robot consists of five parts: the Piezzo locomotion module, the micro control
unit, the communication unit, the navigation system and the micro gripper. The
mobile robot can be guided and positioned in an arena with an accuracy of 5 micrometre
and can be programmed and controlled over the wireless communication unit. Third,
the design and the control of 3 × 3 × 3 mm3 sized micro-/nanorobots with 2 degrees
of freedom will be presented. The transmission of energy and the communication
between the robots is realized via infrared. The robot controller is fully integrated
and has limited functionalities. Via basic sensors communication functions and
elementary rules and behaviours the micro robot can act in a swarm consisting
of hundreds and thousands of robots. Future applications could be monitoring-,
inspection-, exploring-tasks etc. of big areas or objects.'
author:
- first_name: Heiko
full_name: Hamann, Heiko
last_name: Hamann
- first_name: Marc
full_name: Szymanski, Marc
last_name: Szymanski
- first_name: Heinz
full_name: Wörn, Heinz
last_name: Wörn
- first_name: Ramon
full_name: Estana, Ramon
last_name: Estana
- first_name: Ming
full_name: Xie, Ming
last_name: Xie
- first_name: Steven
full_name: Dubowsky, Steven
last_name: Dubowsky
citation:
ama: 'Hamann H, Szymanski M, Wörn H, Estana R, Xie M, Dubowsky S. From Micro to
Nano and Swarm Robotics. In: Advances in Climbing and Walking Robots. Proceedings
of 10th International Conference (CLAWAR’07), Singapore, July 16-18. ; 2007:15--24.
doi:10.1142/9789812770189_0003'
apa: Hamann, H., Szymanski, M., Wörn, H., Estana, R., Xie, M., & Dubowsky, S.
(2007). From Micro to Nano and Swarm Robotics. In Advances in Climbing and
walking robots. Proceedings of 10th International Conference (CLAWAR’07), Singapore,
July 16-18 (pp. 15--24). https://doi.org/10.1142/9789812770189_0003
bibtex: '@inproceedings{Hamann_Szymanski_Wörn_Estana_Xie_Dubowsky_2007, title={From
Micro to Nano and Swarm Robotics}, DOI={10.1142/9789812770189_0003},
booktitle={Advances in Climbing and walking robots. Proceedings of 10th International
Conference (CLAWAR’07), Singapore, July 16-18}, author={Hamann, Heiko and Szymanski,
Marc and Wörn, Heinz and Estana, Ramon and Xie, Ming and Dubowsky, Steven}, year={2007},
pages={15--24} }'
chicago: Hamann, Heiko, Marc Szymanski, Heinz Wörn, Ramon Estana, Ming Xie, and
Steven Dubowsky. “From Micro to Nano and Swarm Robotics.” In Advances in Climbing
and Walking Robots. Proceedings of 10th International Conference (CLAWAR’07),
Singapore, July 16-18, 15--24, 2007. https://doi.org/10.1142/9789812770189_0003.
ieee: H. Hamann, M. Szymanski, H. Wörn, R. Estana, M. Xie, and S. Dubowsky, “From
Micro to Nano and Swarm Robotics,” in Advances in Climbing and walking robots.
Proceedings of 10th International Conference (CLAWAR’07), Singapore, July 16-18,
2007, pp. 15--24.
mla: Hamann, Heiko, et al. “From Micro to Nano and Swarm Robotics.” Advances
in Climbing and Walking Robots. Proceedings of 10th International Conference (CLAWAR’07),
Singapore, July 16-18, 2007, pp. 15--24, doi:10.1142/9789812770189_0003.
short: 'H. Hamann, M. Szymanski, H. Wörn, R. Estana, M. Xie, S. Dubowsky, in: Advances
in Climbing and Walking Robots. Proceedings of 10th International Conference (CLAWAR’07),
Singapore, July 16-18, 2007, pp. 15--24.'
date_created: 2020-11-19T11:37:49Z
date_updated: 2022-01-06T06:54:27Z
department:
- _id: '63'
- _id: '238'
doi: 10.1142/9789812770189_0003
language:
- iso: eng
page: 15--24
publication: Advances in Climbing and walking robots. Proceedings of 10th International
Conference (CLAWAR'07), Singapore, July 16-18
status: public
title: From Micro to Nano and Swarm Robotics
type: conference
user_id: '15415'
year: '2007'
...
---
_id: '17980'
author:
- first_name: Martin
full_name: Ziegler, Martin
last_name: Ziegler
citation:
ama: Ziegler M. Revising Type-2 Computation and Degrees of Discontinuity. Electronic
Notes in Theoretical Computer Science. 2007:255-274. doi:10.1016/j.entcs.2006.08.015
apa: Ziegler, M. (2007). Revising Type-2 Computation and Degrees of Discontinuity.
Electronic Notes in Theoretical Computer Science, 255–274. https://doi.org/10.1016/j.entcs.2006.08.015
bibtex: '@article{Ziegler_2007, title={Revising Type-2 Computation and Degrees of
Discontinuity}, DOI={10.1016/j.entcs.2006.08.015},
journal={Electronic Notes in Theoretical Computer Science}, author={Ziegler, Martin},
year={2007}, pages={255–274} }'
chicago: Ziegler, Martin. “Revising Type-2 Computation and Degrees of Discontinuity.”
Electronic Notes in Theoretical Computer Science, 2007, 255–74. https://doi.org/10.1016/j.entcs.2006.08.015.
ieee: M. Ziegler, “Revising Type-2 Computation and Degrees of Discontinuity,” Electronic
Notes in Theoretical Computer Science, pp. 255–274, 2007.
mla: Ziegler, Martin. “Revising Type-2 Computation and Degrees of Discontinuity.”
Electronic Notes in Theoretical Computer Science, 2007, pp. 255–74, doi:10.1016/j.entcs.2006.08.015.
short: M. Ziegler, Electronic Notes in Theoretical Computer Science (2007) 255–274.
date_created: 2020-08-14T13:30:00Z
date_updated: 2022-01-06T06:53:24Z
department:
- _id: '63'
doi: 10.1016/j.entcs.2006.08.015
language:
- iso: eng
page: 255-274
publication: Electronic Notes in Theoretical Computer Science
publication_identifier:
issn:
- 1571-0661
publication_status: published
status: public
title: Revising Type-2 Computation and Degrees of Discontinuity
type: journal_article
user_id: '15415'
year: '2007'
...
---
_id: '17981'
author:
- first_name: Martin
full_name: Ziegler, Martin
last_name: Ziegler
citation:
ama: Ziegler M. Real Hypercomputation and Continuity. Theory of Computing Systems.
2007:177-206. doi:10.1007/s00224-006-1343-6
apa: Ziegler, M. (2007). Real Hypercomputation and Continuity. Theory of Computing
Systems, 177–206. https://doi.org/10.1007/s00224-006-1343-6
bibtex: '@article{Ziegler_2007, title={Real Hypercomputation and Continuity}, DOI={10.1007/s00224-006-1343-6},
journal={Theory of Computing Systems}, author={Ziegler, Martin}, year={2007},
pages={177–206} }'
chicago: Ziegler, Martin. “Real Hypercomputation and Continuity.” Theory of Computing
Systems, 2007, 177–206. https://doi.org/10.1007/s00224-006-1343-6.
ieee: M. Ziegler, “Real Hypercomputation and Continuity,” Theory of Computing
Systems, pp. 177–206, 2007.
mla: Ziegler, Martin. “Real Hypercomputation and Continuity.” Theory of Computing
Systems, 2007, pp. 177–206, doi:10.1007/s00224-006-1343-6.
short: M. Ziegler, Theory of Computing Systems (2007) 177–206.
date_created: 2020-08-14T13:32:37Z
date_updated: 2022-01-06T06:53:24Z
department:
- _id: '63'
doi: 10.1007/s00224-006-1343-6
language:
- iso: eng
page: 177-206
publication: Theory of Computing Systems
publication_identifier:
issn:
- 1432-4350
- 1433-0490
publication_status: published
status: public
title: Real Hypercomputation and Continuity
type: journal_article
user_id: '15415'
year: '2007'
...
---
_id: '17982'
author:
- first_name: Martin
full_name: Ziegler, Martin
last_name: Ziegler
citation:
ama: 'Ziegler M. (Short) Survey of Real Hypercomputation. In: Lecture Notes in
Computer Science. Berlin, Heidelberg; 2007. doi:10.1007/978-3-540-73001-9_86'
apa: Ziegler, M. (2007). (Short) Survey of Real Hypercomputation. In Lecture
Notes in Computer Science. Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73001-9_86
bibtex: '@inbook{Ziegler_2007, place={Berlin, Heidelberg}, title={(Short) Survey
of Real Hypercomputation}, DOI={10.1007/978-3-540-73001-9_86},
booktitle={Lecture Notes in Computer Science}, author={Ziegler, Martin}, year={2007}
}'
chicago: Ziegler, Martin. “(Short) Survey of Real Hypercomputation.” In Lecture
Notes in Computer Science. Berlin, Heidelberg, 2007. https://doi.org/10.1007/978-3-540-73001-9_86.
ieee: M. Ziegler, “(Short) Survey of Real Hypercomputation,” in Lecture Notes
in Computer Science, Berlin, Heidelberg, 2007.
mla: Ziegler, Martin. “(Short) Survey of Real Hypercomputation.” Lecture Notes
in Computer Science, 2007, doi:10.1007/978-3-540-73001-9_86.
short: 'M. Ziegler, in: Lecture Notes in Computer Science, Berlin, Heidelberg, 2007.'
date_created: 2020-08-14T13:33:50Z
date_updated: 2022-01-06T06:53:24Z
department:
- _id: '63'
doi: 10.1007/978-3-540-73001-9_86
language:
- iso: eng
place: Berlin, Heidelberg
publication: Lecture Notes in Computer Science
publication_identifier:
isbn:
- '9783540730002'
- '9783540730019'
issn:
- 0302-9743
- 1611-3349
publication_status: published
status: public
title: (Short) Survey of Real Hypercomputation
type: book_chapter
user_id: '15415'
year: '2007'
...
---
_id: '17983'
author:
- first_name: Klaus
full_name: Meer, Klaus
last_name: Meer
- first_name: Martin
full_name: Ziegler, Martin
last_name: Ziegler
citation:
ama: 'Meer K, Ziegler M. Real Computational Universality: The Word Problem for a
Class of Groups with Infinite Presentation. In: Mathematical Foundations of
Computer Science 2007. Berlin, Heidelberg; 2007. doi:10.1007/978-3-540-74456-6_64'
apa: 'Meer, K., & Ziegler, M. (2007). Real Computational Universality: The Word
Problem for a Class of Groups with Infinite Presentation. In Mathematical Foundations
of Computer Science 2007. Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74456-6_64'
bibtex: '@inbook{Meer_Ziegler_2007, place={Berlin, Heidelberg}, title={Real Computational
Universality: The Word Problem for a Class of Groups with Infinite Presentation},
DOI={10.1007/978-3-540-74456-6_64},
booktitle={Mathematical Foundations of Computer Science 2007}, author={Meer, Klaus
and Ziegler, Martin}, year={2007} }'
chicago: 'Meer, Klaus, and Martin Ziegler. “Real Computational Universality: The
Word Problem for a Class of Groups with Infinite Presentation.” In Mathematical
Foundations of Computer Science 2007. Berlin, Heidelberg, 2007. https://doi.org/10.1007/978-3-540-74456-6_64.'
ieee: 'K. Meer and M. Ziegler, “Real Computational Universality: The Word Problem
for a Class of Groups with Infinite Presentation,” in Mathematical Foundations
of Computer Science 2007, Berlin, Heidelberg, 2007.'
mla: 'Meer, Klaus, and Martin Ziegler. “Real Computational Universality: The Word
Problem for a Class of Groups with Infinite Presentation.” Mathematical Foundations
of Computer Science 2007, 2007, doi:10.1007/978-3-540-74456-6_64.'
short: 'K. Meer, M. Ziegler, in: Mathematical Foundations of Computer Science 2007,
Berlin, Heidelberg, 2007.'
date_created: 2020-08-14T13:35:56Z
date_updated: 2022-01-06T06:53:24Z
department:
- _id: '63'
doi: 10.1007/978-3-540-74456-6_64
language:
- iso: eng
place: Berlin, Heidelberg
publication: Mathematical Foundations of Computer Science 2007
publication_identifier:
isbn:
- '9783540744559'
- '9783540744566'
issn:
- 0302-9743
- 1611-3349
publication_status: published
status: public
title: 'Real Computational Universality: The Word Problem for a Class of Groups with
Infinite Presentation'
type: book_chapter
user_id: '15415'
year: '2007'
...
---
_id: '17984'
abstract:
- lang: eng
text: "The unit cost model is both convenient and largely realistic for describing\r\ninteger
decision algorithms over (+,*). Additional operations like division\r\nwith remainder
or bitwise conjunction, although equally supported by computing\r\nhardware, may
lead to a considerable drop in complexity. We show a variety of\r\nconcrete problems
to benefit from such NON-arithmetic primitives by presenting\r\nand analyzing
corresponding fast algorithms."
author:
- first_name: Katharina
full_name: Lürwer-Brüggemeier, Katharina
last_name: Lürwer-Brüggemeier
- first_name: Martin
full_name: Ziegler, Martin
last_name: Ziegler
citation:
ama: Lürwer-Brüggemeier K, Ziegler M. On Faster Integer Calculations using Non-Arithmetic
Primitives. arXiv:07090624. 2007.
apa: Lürwer-Brüggemeier, K., & Ziegler, M. (2007). On Faster Integer Calculations
using Non-Arithmetic Primitives. ArXiv:0709.0624.
bibtex: '@article{Lürwer-Brüggemeier_Ziegler_2007, title={On Faster Integer Calculations
using Non-Arithmetic Primitives}, journal={arXiv:0709.0624}, author={Lürwer-Brüggemeier,
Katharina and Ziegler, Martin}, year={2007} }'
chicago: Lürwer-Brüggemeier, Katharina, and Martin Ziegler. “On Faster Integer Calculations
Using Non-Arithmetic Primitives.” ArXiv:0709.0624, 2007.
ieee: K. Lürwer-Brüggemeier and M. Ziegler, “On Faster Integer Calculations using
Non-Arithmetic Primitives,” arXiv:0709.0624. 2007.
mla: Lürwer-Brüggemeier, Katharina, and Martin Ziegler. “On Faster Integer Calculations
Using Non-Arithmetic Primitives.” ArXiv:0709.0624, 2007.
short: K. Lürwer-Brüggemeier, M. Ziegler, ArXiv:0709.0624 (2007).
date_created: 2020-08-14T13:36:55Z
date_updated: 2022-01-06T06:53:24Z
department:
- _id: '63'
language:
- iso: eng
publication: arXiv:0709.0624
status: public
title: On Faster Integer Calculations using Non-Arithmetic Primitives
type: preprint
user_id: '15415'
year: '2007'
...
---
_id: '18285'
author:
- first_name: Martin
full_name: Ziegler, Martin
last_name: Ziegler
citation:
ama: Ziegler M. Real Computability and Hypercomputation.; 2007.
apa: Ziegler, M. (2007). Real Computability and Hypercomputation.
bibtex: '@book{Ziegler_2007, title={Real Computability and Hypercomputation}, author={Ziegler,
Martin}, year={2007} }'
chicago: Ziegler, Martin. Real Computability and Hypercomputation, 2007.
ieee: M. Ziegler, Real Computability and Hypercomputation. 2007.
mla: Ziegler, Martin. Real Computability and Hypercomputation. 2007.
short: M. Ziegler, Real Computability and Hypercomputation, 2007.
date_created: 2020-08-25T13:11:38Z
date_updated: 2022-01-06T06:53:28Z
ddc:
- '000'
department:
- _id: '63'
file:
- access_level: closed
content_type: application/pdf
creator: koala
date_created: 2020-08-25T13:11:15Z
date_updated: 2020-08-25T13:11:15Z
file_id: '18286'
file_name: real-comp-2007.pdf
file_size: 2157961
relation: main_file
success: 1
file_date_updated: 2020-08-25T13:11:15Z
has_accepted_license: '1'
language:
- iso: eng
report_number: ' tr-ri-07-285'
status: public
title: Real Computability and Hypercomputation
type: report
user_id: '15415'
year: '2007'
...
---
_id: '18347'
abstract:
- lang: eng
text: "The validation of material flow models as well as the selection of promising
strategies for the generation of a successful experiment plan is a time-consuming
process. A new approach is presented, which supports the simulation expert in
his working process by giving him the opportunity to modify the simulated simulation
run and afterwards compare the effects of his modification with the original setting,
online and in one user interface, implemented by switching the visualizations
between the simulation runs or opening up to 5 parallel 3D windows. The method
developed therefore clones existing simulation runs online and allows the navigation
within these existing simulation runs. The method has been implemented and is
validated by a test model, which describes in detail the new working process of
a modeler. New research questions are derived from this work, which will define
following working steps.\r\n"
author:
- first_name: Matthias
full_name: Fischer, Matthias
id: '146'
last_name: Fischer
- first_name: 'Christoph '
full_name: 'Laroque, Christoph '
last_name: Laroque
- first_name: 'Daniel '
full_name: 'Huber, Daniel '
last_name: Huber
- first_name: 'Jens '
full_name: 'Krokowski, Jens '
last_name: Krokowski
- first_name: 'Bengt '
full_name: 'Mueck, Bengt '
last_name: Mueck
- first_name: 'Michael '
full_name: 'Kortenjan, Michael '
last_name: Kortenjan
- first_name: Mark
full_name: Aufenanger, Mark
last_name: Aufenanger
- first_name: Wilhelm
full_name: ' Dangelmaier, Wilhelm'
last_name: ' Dangelmaier'
citation:
ama: 'Fischer M, Laroque C, Huber D, et al. Interactive Refinement of a Material
Flow Simulation Model by Comparing Multiple Simulation Runs in one 3D Environment.
In: European Simulation and Modelling Conference (ESM 2007). ; 2007:499--505.'
apa: Fischer, M., Laroque, C., Huber, D., Krokowski, J., Mueck, B., Kortenjan, M.,
… Dangelmaier, W. (2007). Interactive Refinement of a Material Flow Simulation
Model by Comparing Multiple Simulation Runs in one 3D Environment. In European
Simulation and Modelling Conference (ESM 2007) (pp. 499--505).
bibtex: '@inproceedings{Fischer_Laroque_Huber_Krokowski_Mueck_Kortenjan_Aufenanger_
Dangelmaier_2007, title={Interactive Refinement of a Material Flow Simulation
Model by Comparing Multiple Simulation Runs in one 3D Environment}, booktitle={European
Simulation and Modelling Conference (ESM 2007)}, author={Fischer, Matthias and
Laroque, Christoph and Huber, Daniel and Krokowski, Jens and Mueck, Bengt and
Kortenjan, Michael and Aufenanger, Mark and Dangelmaier, Wilhelm}, year={2007},
pages={499--505} }'
chicago: Fischer, Matthias, Christoph Laroque, Daniel Huber, Jens Krokowski,
Bengt Mueck, Michael Kortenjan, Mark Aufenanger, and Wilhelm Dangelmaier. “Interactive
Refinement of a Material Flow Simulation Model by Comparing Multiple Simulation
Runs in One 3D Environment.” In European Simulation and Modelling Conference
(ESM 2007), 499--505, 2007.
ieee: M. Fischer et al., “Interactive Refinement of a Material Flow Simulation
Model by Comparing Multiple Simulation Runs in one 3D Environment,” in European
Simulation and Modelling Conference (ESM 2007), 2007, pp. 499--505.
mla: Fischer, Matthias, et al. “Interactive Refinement of a Material Flow Simulation
Model by Comparing Multiple Simulation Runs in One 3D Environment.” European
Simulation and Modelling Conference (ESM 2007), 2007, pp. 499--505.
short: 'M. Fischer, C. Laroque, D. Huber, J. Krokowski, B. Mueck, M. Kortenjan,
M. Aufenanger, W. Dangelmaier, in: European Simulation and Modelling Conference
(ESM 2007), 2007, pp. 499--505.'
date_created: 2020-08-26T09:23:24Z
date_updated: 2022-01-06T06:53:29Z
ddc:
- '004'
department:
- _id: '63'
file:
- access_level: closed
content_type: application/pdf
creator: koala
date_created: 2020-08-26T09:22:47Z
date_updated: 2020-08-26T09:22:47Z
file_id: '18348'
file_name: ESM07_final.pdf
file_size: 389588
relation: main_file
success: 1
file_date_updated: 2020-08-26T09:22:47Z
has_accepted_license: '1'
language:
- iso: eng
page: 499--505
publication: European Simulation and Modelling Conference (ESM 2007)
status: public
title: Interactive Refinement of a Material Flow Simulation Model by Comparing Multiple
Simulation Runs in one 3D Environment
type: conference
user_id: '15415'
year: '2007'
...
---
_id: '18349'
author:
- first_name: Wilhelm
full_name: Dangelmaier, Wilhelm
last_name: Dangelmaier
- first_name: 'Christoph '
full_name: ' Laroque, Christoph '
last_name: ' Laroque'
- first_name: Matthias
full_name: Fischer, Matthias
id: '146'
last_name: Fischer
citation:
ama: 'Dangelmaier W, Laroque C, Fischer M. Ein ganzheitlicher Ansatz zur immersiven
3D-Materialflusssimulation innerhalb der Digitalen Fabrik. In: Augmented &
Virtual Reality in Der Produktentstehung. Vol 209. Verlagsschriftenreihe des
Heinz Nixdorf Instituts, Paderborn. Verlagsschriftenreihe des Heinz Nixdorf Instituts,
Paderborn; 2007:95-110.'
apa: Dangelmaier, W., Laroque, C., & Fischer, M. (2007). Ein ganzheitlicher
Ansatz zur immersiven 3D-Materialflusssimulation innerhalb der Digitalen Fabrik.
Augmented & Virtual Reality in Der Produktentstehung, 209, 95–110.
bibtex: '@inproceedings{Dangelmaier_ Laroque_Fischer_2007, series={Verlagsschriftenreihe
des Heinz Nixdorf Instituts, Paderborn}, title={Ein ganzheitlicher Ansatz zur
immersiven 3D-Materialflusssimulation innerhalb der Digitalen Fabrik}, volume={209},
booktitle={Augmented & Virtual Reality in der Produktentstehung}, publisher={Verlagsschriftenreihe
des Heinz Nixdorf Instituts, Paderborn}, author={Dangelmaier, Wilhelm and Laroque,
Christoph and Fischer, Matthias}, year={2007}, pages={95–110}, collection={Verlagsschriftenreihe
des Heinz Nixdorf Instituts, Paderborn} }'
chicago: Dangelmaier, Wilhelm, Christoph Laroque, and Matthias Fischer. “Ein Ganzheitlicher
Ansatz Zur Immersiven 3D-Materialflusssimulation Innerhalb Der Digitalen Fabrik.”
In Augmented & Virtual Reality in Der Produktentstehung, 209:95–110.
Verlagsschriftenreihe Des Heinz Nixdorf Instituts, Paderborn. Verlagsschriftenreihe
des Heinz Nixdorf Instituts, Paderborn, 2007.
ieee: W. Dangelmaier, C. Laroque, and M. Fischer, “Ein ganzheitlicher Ansatz zur
immersiven 3D-Materialflusssimulation innerhalb der Digitalen Fabrik,” in Augmented
& Virtual Reality in der Produktentstehung, 2007, vol. 209, pp. 95–110.
mla: Dangelmaier, Wilhelm, et al. “Ein Ganzheitlicher Ansatz Zur Immersiven 3D-Materialflusssimulation
Innerhalb Der Digitalen Fabrik.” Augmented & Virtual Reality in Der Produktentstehung,
vol. 209, Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn, 2007,
pp. 95–110.
short: 'W. Dangelmaier, C. Laroque, M. Fischer, in: Augmented & Virtual Reality
in Der Produktentstehung, Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn,
2007, pp. 95–110.'
date_created: 2020-08-26T09:30:58Z
date_updated: 2022-01-06T06:53:29Z
department:
- _id: '63'
- _id: '26'
intvolume: ' 209'
language:
- iso: eng
page: 95-110
publication: Augmented & Virtual Reality in der Produktentstehung
publisher: Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn
series_title: Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn
status: public
title: Ein ganzheitlicher Ansatz zur immersiven 3D-Materialflusssimulation innerhalb
der Digitalen Fabrik
type: conference
user_id: '5786'
volume: 209
year: '2007'
...
---
_id: '1840'
author:
- first_name: Dereje H.
full_name: Woldegebreal, Dereje H.
last_name: Woldegebreal
- first_name: Holger
full_name: Karl, Holger
id: '126'
last_name: Karl
citation:
ama: 'Woldegebreal DH, Karl H. Multiple-Access Relay Channel with Network Coding
and Non-Ideal Source-Relay Channels. In: 2007 4th International Symposium on
Wireless Communication Systems. IEEE; 2007. doi:10.1109/iswcs.2007.4392437'
apa: Woldegebreal, D. H., & Karl, H. (2007). Multiple-Access Relay Channel with
Network Coding and Non-Ideal Source-Relay Channels. In 2007 4th International
Symposium on Wireless Communication Systems. IEEE. https://doi.org/10.1109/iswcs.2007.4392437
bibtex: '@inproceedings{Woldegebreal_Karl_2007, title={Multiple-Access Relay Channel
with Network Coding and Non-Ideal Source-Relay Channels}, DOI={10.1109/iswcs.2007.4392437},
booktitle={2007 4th International Symposium on Wireless Communication Systems},
publisher={IEEE}, author={Woldegebreal, Dereje H. and Karl, Holger}, year={2007}
}'
chicago: Woldegebreal, Dereje H., and Holger Karl. “Multiple-Access Relay Channel
with Network Coding and Non-Ideal Source-Relay Channels.” In 2007 4th International
Symposium on Wireless Communication Systems. IEEE, 2007. https://doi.org/10.1109/iswcs.2007.4392437.
ieee: D. H. Woldegebreal and H. Karl, “Multiple-Access Relay Channel with Network
Coding and Non-Ideal Source-Relay Channels,” in 2007 4th International Symposium
on Wireless Communication Systems, 2007.
mla: Woldegebreal, Dereje H., and Holger Karl. “Multiple-Access Relay Channel with
Network Coding and Non-Ideal Source-Relay Channels.” 2007 4th International
Symposium on Wireless Communication Systems, IEEE, 2007, doi:10.1109/iswcs.2007.4392437.
short: 'D.H. Woldegebreal, H. Karl, in: 2007 4th International Symposium on Wireless
Communication Systems, IEEE, 2007.'
date_created: 2018-03-27T13:00:30Z
date_updated: 2022-01-06T06:53:32Z
department:
- _id: '75'
doi: 10.1109/iswcs.2007.4392437
publication: 2007 4th International Symposium on Wireless Communication Systems
publication_identifier:
isbn:
- '9781424409785'
- '9781424409792'
publication_status: published
publisher: IEEE
status: public
title: Multiple-Access Relay Channel with Network Coding and Non-Ideal Source-Relay
Channels
type: conference
user_id: '15572'
year: '2007'
...
---
_id: '1842'
author:
- first_name: Holger
full_name: Karl, Holger
id: '126'
last_name: Karl
citation:
ama: 'Karl H. Optimizing sleeping intervals in preamble sampling MAC for WSNs. In:
Bern / Switzerland: Communication in Distributed Systems (KiVS), 2007 ITG-GI Conference;
2007.'
apa: 'Karl, H. (2007). Optimizing sleeping intervals in preamble sampling MAC for
WSNs. Bern / Switzerland: Communication in Distributed Systems (KiVS), 2007 ITG-GI
Conference.'
bibtex: '@inproceedings{Karl_2007, place={Bern / Switzerland}, title={Optimizing
sleeping intervals in preamble sampling MAC for WSNs}, publisher={Communication
in Distributed Systems (KiVS), 2007 ITG-GI Conference}, author={Karl, Holger},
year={2007} }'
chicago: 'Karl, Holger. “Optimizing Sleeping Intervals in Preamble Sampling MAC
for WSNs.” Bern / Switzerland: Communication in Distributed Systems (KiVS), 2007
ITG-GI Conference, 2007.'
ieee: H. Karl, “Optimizing sleeping intervals in preamble sampling MAC for WSNs,”
2007.
mla: Karl, Holger. Optimizing Sleeping Intervals in Preamble Sampling MAC for
WSNs. Communication in Distributed Systems (KiVS), 2007 ITG-GI Conference,
2007.
short: 'H. Karl, in: Communication in Distributed Systems (KiVS), 2007 ITG-GI Conference,
Bern / Switzerland, 2007.'
date_created: 2018-03-27T13:11:08Z
date_updated: 2022-01-06T06:53:32Z
department:
- _id: '75'
place: Bern / Switzerland
publisher: Communication in Distributed Systems (KiVS), 2007 ITG-GI Conference
status: public
title: Optimizing sleeping intervals in preamble sampling MAC for WSNs
type: conference
user_id: '15572'
year: '2007'
...
---
_id: '18572'
abstract:
- lang: eng
text: "We present random sampling algorithms that with probability at least 1 − δ
compute a (1 ±ε)-approximation of the clustering coefficient and of the number
of bipartite clique subgraphs of a graph given as an incidence stream of edges.
The space used by our algorithm to estimate the clustering coefficient is inversely
related to the clustering coefficient of the network itself. The space used by
our algorithm to compute the number K 3,3 of bipartite cliques is proportional
to the ratio between the number of K 1,3 and K 3,3 in the graph.\r\n\r\nSince
the space complexity depends only on the structure of the input graph and not
on the number of nodes, our algorithms scale very well with increasing graph size.
Therefore they provide a basic tool to analyze the structure of dense clusters
in large graphs and have many applications in the discovery of web communities,
the analysis of the structure of large social networks and the probing of frequent
patterns in large graphs.\r\n\r\nWe implemented both algorithms and evaluated
their performance on networks from different application domains and of different
size; The largest instance is a webgraph consisting of more than 135 million nodes
and 1 billion edges. Both algorithms compute accurate results in reasonable time
on the tested instances."
author:
- first_name: Luciana S.
full_name: Buriol, Luciana S.
last_name: Buriol
- first_name: Gereon
full_name: Frahling, Gereon
last_name: Frahling
- first_name: Stefano
full_name: Leonardi, Stefano
last_name: Leonardi
- first_name: Christian
full_name: Sohler, Christian
last_name: Sohler
citation:
ama: 'Buriol LS, Frahling G, Leonardi S, Sohler C. Estimating Clustering Indexes
in Data Streams. In: Proceedings of the 15th European Symposium on Algorithms
(ESA). Vol 4698. Lecture Notes in Computer Science. Berlin, Heidelberg: Springer;
2007:618-632. doi:10.1007/978-3-540-75520-3_55'
apa: 'Buriol, L. S., Frahling, G., Leonardi, S., & Sohler, C. (2007). Estimating
Clustering Indexes in Data Streams. In Proceedings of the 15th European Symposium
on Algorithms (ESA) (Vol. 4698, pp. 618–632). Berlin, Heidelberg: Springer.
https://doi.org/10.1007/978-3-540-75520-3_55'
bibtex: '@inproceedings{Buriol_Frahling_Leonardi_Sohler_2007, place={Berlin, Heidelberg},
series={Lecture Notes in Computer Science}, title={Estimating Clustering Indexes
in Data Streams}, volume={4698}, DOI={10.1007/978-3-540-75520-3_55},
booktitle={Proceedings of the 15th European Symposium on Algorithms (ESA)}, publisher={Springer},
author={Buriol, Luciana S. and Frahling, Gereon and Leonardi, Stefano and Sohler,
Christian}, year={2007}, pages={618–632}, collection={Lecture Notes in Computer
Science} }'
chicago: 'Buriol, Luciana S., Gereon Frahling, Stefano Leonardi, and Christian Sohler.
“Estimating Clustering Indexes in Data Streams.” In Proceedings of the 15th
European Symposium on Algorithms (ESA), 4698:618–32. Lecture Notes in Computer
Science. Berlin, Heidelberg: Springer, 2007. https://doi.org/10.1007/978-3-540-75520-3_55.'
ieee: L. S. Buriol, G. Frahling, S. Leonardi, and C. Sohler, “Estimating Clustering
Indexes in Data Streams,” in Proceedings of the 15th European Symposium on
Algorithms (ESA), 2007, vol. 4698, pp. 618–632.
mla: Buriol, Luciana S., et al. “Estimating Clustering Indexes in Data Streams.”
Proceedings of the 15th European Symposium on Algorithms (ESA), vol. 4698,
Springer, 2007, pp. 618–32, doi:10.1007/978-3-540-75520-3_55.
short: 'L.S. Buriol, G. Frahling, S. Leonardi, C. Sohler, in: Proceedings of the
15th European Symposium on Algorithms (ESA), Springer, Berlin, Heidelberg, 2007,
pp. 618–632.'
date_created: 2020-08-28T12:46:05Z
date_updated: 2022-01-06T06:53:40Z
department:
- _id: '63'
doi: 10.1007/978-3-540-75520-3_55
intvolume: ' 4698'
language:
- iso: eng
page: 618-632
place: Berlin, Heidelberg
publication: Proceedings of the 15th European Symposium on Algorithms (ESA)
publication_identifier:
isbn:
- '9783540755197'
publication_status: published
publisher: Springer
series_title: Lecture Notes in Computer Science
status: public
title: Estimating Clustering Indexes in Data Streams
type: conference
user_id: '15415'
volume: 4698
year: '2007'
...
---
_id: '18588'
author:
- first_name: Arno
full_name: Schindlmayr, Arno
id: '458'
last_name: Schindlmayr
orcid: 0000-0002-4855-071X
citation:
ama: 'Schindlmayr A. Interaction of radiation with matter. Part II: Light and electrons.
In: Urban K, Schneider CM, Brückel T, Blügel S, eds. Probing the Nanoworld
. Vol 34. Matter and Materials. Jülich: Forschungszentrum Jülich; 2007:A1.21-A1.36.'
apa: 'Schindlmayr, A. (2007). Interaction of radiation with matter. Part II: Light
and electrons. In K. Urban, C. M. Schneider, T. Brückel, & S. Blügel (Eds.),
Probing the Nanoworld (Vol. 34, p. A1.21-A1.36). Jülich: Forschungszentrum
Jülich.'
bibtex: '@inbook{Schindlmayr_2007, place={Jülich}, series={Matter and Materials},
title={Interaction of radiation with matter. Part II: Light and electrons}, volume={34},
booktitle={Probing the Nanoworld }, publisher={Forschungszentrum Jülich}, author={Schindlmayr,
Arno}, editor={Urban, Knut and Schneider, Claus Michael and Brückel, Thomas and
Blügel, StefanEditors}, year={2007}, pages={A1.21-A1.36}, collection={Matter and
Materials} }'
chicago: 'Schindlmayr, Arno. “Interaction of Radiation with Matter. Part II: Light
and Electrons.” In Probing the Nanoworld , edited by Knut Urban, Claus
Michael Schneider, Thomas Brückel, and Stefan Blügel, 34:A1.21-A1.36. Matter and
Materials. Jülich: Forschungszentrum Jülich, 2007.'
ieee: 'A. Schindlmayr, “Interaction of radiation with matter. Part II: Light and
electrons,” in Probing the Nanoworld , vol. 34, K. Urban, C. M. Schneider,
T. Brückel, and S. Blügel, Eds. Jülich: Forschungszentrum Jülich, 2007, p. A1.21-A1.36.'
mla: 'Schindlmayr, Arno. “Interaction of Radiation with Matter. Part II: Light and
Electrons.” Probing the Nanoworld , edited by Knut Urban et al., vol. 34,
Forschungszentrum Jülich, 2007, p. A1.21-A1.36.'
short: 'A. Schindlmayr, in: K. Urban, C.M. Schneider, T. Brückel, S. Blügel (Eds.),
Probing the Nanoworld , Forschungszentrum Jülich, Jülich, 2007, p. A1.21-A1.36.'
conference:
end_date: 2007-03-23
location: Jülich
name: 38th Spring School of the Institute of Solid State Research
start_date: 2007-03-12
date_created: 2020-08-28T16:18:39Z
date_updated: 2022-01-06T06:53:40Z
ddc:
- '530'
editor:
- first_name: Knut
full_name: Urban, Knut
last_name: Urban
- first_name: Claus Michael
full_name: Schneider, Claus Michael
last_name: Schneider
- first_name: Thomas
full_name: Brückel, Thomas
last_name: Brückel
- first_name: Stefan
full_name: Blügel, Stefan
last_name: Blügel
extern: '1'
file:
- access_level: request
content_type: application/pdf
creator: schindlm
date_created: 2020-10-05T11:43:03Z
date_updated: 2022-01-06T06:53:40Z
description: © 2007 Forschungszentrum Jülich
file_id: '19878'
file_name: A01-Schindlmayr.pdf
file_size: 281378
relation: main_file
title: 'Interaction of radiation with matter: Part II: Light and electrons'
file_date_updated: 2022-01-06T06:53:40Z
has_accepted_license: '1'
intvolume: ' 34'
language:
- iso: eng
main_file_link:
- url: http://juser.fz-juelich.de/record/811870
page: A1.21-A1.36
place: Jülich
publication: 'Probing the Nanoworld '
publication_identifier:
isbn:
- 978-3-89336-462-6
issn:
- 1433-5506
publication_status: published
publisher: Forschungszentrum Jülich
series_title: Matter and Materials
status: public
title: 'Interaction of radiation with matter. Part II: Light and electrons'
type: book_chapter
user_id: '458'
volume: 34
year: '2007'
...
---
_id: '18589'
abstract:
- lang: eng
text: For the calculation of neutral excitations, time-dependent density functional
theory (TDDFT) is an exact reformulation of the many-body time-dependent Schrödinger
equation, based on knowledge of the density instead of the many-body wavefunction.
The density can be determined in an efficient scheme by solving one-particle non-interacting
Schrödinger equations—the Kohn–Sham equations. The complication of the problem
is hidden in the—unknown—time-dependent exchange and correlation potential that
appears in the Kohn–Sham equations and for which it is essential to find good
approximations. Many approximations have been suggested and tested for finite
systems, where even the very simple adiabatic local-density approximation (ALDA)
has often proved to be successful. In the case of solids, ALDA fails to reproduce
optical absorption spectra, which are instead well described by solving the Bethe–Salpeter
equation of many-body perturbation theory (MBPT). On the other hand, ALDA can
lead to excellent results for loss functions (at vanishing and finite momentum
transfer). In view of this and thanks to recent successful developments of improved
linear-response kernels derived from MBPT, TDDFT is today considered a promising
alternative to MBPT for the calculation of electronic spectra, even for solids.
After reviewing the fundamentals of TDDFT within linear response, we discuss different
approaches and a variety of applications to extended systems.
article_type: review
author:
- first_name: Silvana
full_name: Botti, Silvana
last_name: Botti
- first_name: Arno
full_name: Schindlmayr, Arno
id: '458'
last_name: Schindlmayr
orcid: 0000-0002-4855-071X
- first_name: Rodolfo
full_name: Del Sole, Rodolfo
last_name: Del Sole
- first_name: Lucia
full_name: Reining, Lucia
last_name: Reining
citation:
ama: Botti S, Schindlmayr A, Del Sole R, Reining L. Time-dependent density-functional
theory for extended systems. Reports on Progress in Physics. 2007;70(3):357-407.
doi:10.1088/0034-4885/70/3/r02
apa: Botti, S., Schindlmayr, A., Del Sole, R., & Reining, L. (2007). Time-dependent
density-functional theory for extended systems. Reports on Progress in Physics,
70(3), 357–407. https://doi.org/10.1088/0034-4885/70/3/r02
bibtex: '@article{Botti_Schindlmayr_Del Sole_Reining_2007, title={Time-dependent
density-functional theory for extended systems}, volume={70}, DOI={10.1088/0034-4885/70/3/r02},
number={3}, journal={Reports on Progress in Physics}, publisher={IOP Publishing},
author={Botti, Silvana and Schindlmayr, Arno and Del Sole, Rodolfo and Reining,
Lucia}, year={2007}, pages={357–407} }'
chicago: 'Botti, Silvana, Arno Schindlmayr, Rodolfo Del Sole, and Lucia Reining.
“Time-Dependent Density-Functional Theory for Extended Systems.” Reports on
Progress in Physics 70, no. 3 (2007): 357–407. https://doi.org/10.1088/0034-4885/70/3/r02.'
ieee: S. Botti, A. Schindlmayr, R. Del Sole, and L. Reining, “Time-dependent density-functional
theory for extended systems,” Reports on Progress in Physics, vol. 70,
no. 3, pp. 357–407, 2007.
mla: Botti, Silvana, et al. “Time-Dependent Density-Functional Theory for Extended
Systems.” Reports on Progress in Physics, vol. 70, no. 3, IOP Publishing,
2007, pp. 357–407, doi:10.1088/0034-4885/70/3/r02.
short: S. Botti, A. Schindlmayr, R. Del Sole, L. Reining, Reports on Progress in
Physics 70 (2007) 357–407.
date_created: 2020-08-28T16:30:06Z
date_updated: 2022-01-06T06:53:40Z
ddc:
- '530'
doi: 10.1088/0034-4885/70/3/r02
extern: '1'
external_id:
isi:
- '000244875800003'
file:
- access_level: closed
content_type: application/pdf
creator: schindlm
date_created: 2020-08-28T16:32:12Z
date_updated: 2020-08-30T15:37:17Z
description: © 2007 IOP Publishing Ltd
file_id: '18590'
file_name: Botti_2007_Rep._Prog._Phys._70_R02.pdf
file_size: 1166692
relation: main_file
title: Time-dependent density-functional theory for extended systems
file_date_updated: 2020-08-30T15:37:17Z
has_accepted_license: '1'
intvolume: ' 70'
isi: '1'
issue: '3'
language:
- iso: eng
page: 357-407
publication: Reports on Progress in Physics
publication_identifier:
eissn:
- 1361-6633
issn:
- 0034-4885
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
status: public
title: Time-dependent density-functional theory for extended systems
type: journal_article
user_id: '458'
volume: 70
year: '2007'
...
---
_id: '18591'
abstract:
- lang: eng
text: Using density-functional theory, we investigate the stability of the half-metallic
ground state of magnetite under different strain conditions. The effects of volume
relaxation and internal degrees of freedom are fully taken into account. For hydrostatic
compression, planar strain in the (001) plane and uniaxial strain along the [001]
direction, we derive quantitative limits beyond which magnetite becomes metallic.
As a major new result, we identify the bond length between the octahedrally coordinated
iron atoms and their neighbouring oxygen atoms as the main characteristic parameter,
and we show that the transition occurs if external strain reduces this interatomic
distance from 2.06 Å in equilibrium to below a critical value of 1.99 Å. Based
on this criterion, we also argue that planar strain due to epitaxial growth does
not lead to a metallic state for magnetite films grown on (111)-oriented substrates.
article_number: '5'
article_type: original
author:
- first_name: Martin
full_name: Friák, Martin
last_name: Friák
- first_name: Arno
full_name: Schindlmayr, Arno
id: '458'
last_name: Schindlmayr
orcid: 0000-0002-4855-071X
- first_name: Matthias
full_name: Scheffler, Matthias
last_name: Scheffler
citation:
ama: Friák M, Schindlmayr A, Scheffler M. Ab initio study of the half-metal to metal
transition in strained magnetite. New Journal of Physics. 2007;9(1). doi:10.1088/1367-2630/9/1/005
apa: Friák, M., Schindlmayr, A., & Scheffler, M. (2007). Ab initio study of
the half-metal to metal transition in strained magnetite. New Journal of Physics,
9(1). https://doi.org/10.1088/1367-2630/9/1/005
bibtex: '@article{Friák_Schindlmayr_Scheffler_2007, title={Ab initio study of the
half-metal to metal transition in strained magnetite}, volume={9}, DOI={10.1088/1367-2630/9/1/005},
number={15}, journal={New Journal of Physics}, publisher={IOP Publishing and Deutsche
Physikalische Gesellschaft}, author={Friák, Martin and Schindlmayr, Arno and Scheffler,
Matthias}, year={2007} }'
chicago: Friák, Martin, Arno Schindlmayr, and Matthias Scheffler. “Ab Initio Study
of the Half-Metal to Metal Transition in Strained Magnetite.” New Journal of
Physics 9, no. 1 (2007). https://doi.org/10.1088/1367-2630/9/1/005.
ieee: M. Friák, A. Schindlmayr, and M. Scheffler, “Ab initio study of the half-metal
to metal transition in strained magnetite,” New Journal of Physics, vol.
9, no. 1, 2007.
mla: Friák, Martin, et al. “Ab Initio Study of the Half-Metal to Metal Transition
in Strained Magnetite.” New Journal of Physics, vol. 9, no. 1, 5, IOP Publishing
and Deutsche Physikalische Gesellschaft, 2007, doi:10.1088/1367-2630/9/1/005.
short: M. Friák, A. Schindlmayr, M. Scheffler, New Journal of Physics 9 (2007).
date_created: 2020-08-28T16:34:37Z
date_updated: 2022-01-06T06:53:41Z
ddc:
- '530'
doi: 10.1088/1367-2630/9/1/005
extern: '1'
external_id:
isi:
- '000243590400002'
file:
- access_level: open_access
content_type: application/pdf
creator: schindlm
date_created: 2020-08-28T16:40:11Z
date_updated: 2020-08-30T15:40:54Z
description: © 2007 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft
file_id: '18592'
file_name: Friák_2007_New_J._Phys._9_005.pdf
file_size: 573804
relation: main_file
title: Ab initio study of the half-metal to metal transition in strained magnetite
file_date_updated: 2020-08-30T15:40:54Z
has_accepted_license: '1'
intvolume: ' 9'
isi: '1'
issue: '1'
language:
- iso: eng
oa: '1'
publication: New Journal of Physics
publication_identifier:
eissn:
- 1361-6633
issn:
- 0034-4885
publication_status: published
publisher: IOP Publishing and Deutsche Physikalische Gesellschaft
quality_controlled: '1'
status: public
title: Ab initio study of the half-metal to metal transition in strained magnetite
type: journal_article
user_id: '458'
volume: 9
year: '2007'
...
---
_id: '18593'
abstract:
- lang: eng
text: We present a quantitative parameter-free method for calculating defect states
and charge-transition levels of point defects in semiconductors. It combines the
strength of density-functional theory for ground-state total energies with quasiparticle
corrections to the excitation spectrum obtained from many-body perturbation theory.
The latter is implemented within the G0W0 approximation, in which the electronic
self-energy is constructed non-self-consistently from the Green’s function of
the underlying Kohn–Sham system. The method is general and applicable to arbitrary
bulk or surface defects. As an example we consider anion vacancies at the (110)
surfaces of III–V semiconductors. Relative to the Kohn–Sham eigenvalues in the
local-density approximation, the quasiparticle corrections open the fundamental
band gap and raise the position of defect states inside the gap. As a consequence,
the charge-transition levels are also pushed to higher energies, leading to close
agreement with the available experimental data.
author:
- first_name: Arno
full_name: Schindlmayr, Arno
id: '458'
last_name: Schindlmayr
orcid: 0000-0002-4855-071X
- first_name: Matthias
full_name: Scheffler, Matthias
last_name: Scheffler
citation:
ama: 'Schindlmayr A, Scheffler M. Quasiparticle calculations for point defects at
semiconductor surfaces. In: Drabold DA, Estreicher SK, eds. Theory of Defects
in Semiconductors. Vol 104. Topics in Applied Physics. Berlin, Heidelberg:
Springer; 2007:165-192. doi:10.1007/11690320_8'
apa: 'Schindlmayr, A., & Scheffler, M. (2007). Quasiparticle calculations for
point defects at semiconductor surfaces. In D. A. Drabold & S. K. Estreicher
(Eds.), Theory of Defects in Semiconductors (Vol. 104, pp. 165–192). Berlin,
Heidelberg: Springer. https://doi.org/10.1007/11690320_8'
bibtex: '@inbook{Schindlmayr_Scheffler_2007, place={Berlin, Heidelberg}, series={Topics
in Applied Physics}, title={Quasiparticle calculations for point defects at semiconductor
surfaces}, volume={104}, DOI={10.1007/11690320_8},
booktitle={Theory of Defects in Semiconductors}, publisher={Springer}, author={Schindlmayr,
Arno and Scheffler, Matthias}, editor={Drabold, David A. and Estreicher, Stefan
K.Editors}, year={2007}, pages={165–192}, collection={Topics in Applied Physics}
}'
chicago: 'Schindlmayr, Arno, and Matthias Scheffler. “Quasiparticle Calculations
for Point Defects at Semiconductor Surfaces.” In Theory of Defects in Semiconductors,
edited by David A. Drabold and Stefan K. Estreicher, 104:165–92. Topics in Applied
Physics. Berlin, Heidelberg: Springer, 2007. https://doi.org/10.1007/11690320_8.'
ieee: 'A. Schindlmayr and M. Scheffler, “Quasiparticle calculations for point defects
at semiconductor surfaces,” in Theory of Defects in Semiconductors, vol.
104, D. A. Drabold and S. K. Estreicher, Eds. Berlin, Heidelberg: Springer, 2007,
pp. 165–192.'
mla: Schindlmayr, Arno, and Matthias Scheffler. “Quasiparticle Calculations for
Point Defects at Semiconductor Surfaces.” Theory of Defects in Semiconductors,
edited by David A. Drabold and Stefan K. Estreicher, vol. 104, Springer, 2007,
pp. 165–92, doi:10.1007/11690320_8.
short: 'A. Schindlmayr, M. Scheffler, in: D.A. Drabold, S.K. Estreicher (Eds.),
Theory of Defects in Semiconductors, Springer, Berlin, Heidelberg, 2007, pp. 165–192.'
date_created: 2020-08-28T16:43:51Z
date_updated: 2022-01-06T06:53:41Z
ddc:
- '530'
doi: 10.1007/11690320_8
editor:
- first_name: David A.
full_name: Drabold, David A.
last_name: Drabold
- first_name: Stefan K.
full_name: Estreicher, Stefan K.
last_name: Estreicher
extern: '1'
external_id:
isi:
- '000241944900008'
file:
- access_level: closed
content_type: application/pdf
creator: schindlm
date_created: 2020-08-28T16:49:56Z
date_updated: 2020-08-30T15:42:34Z
description: © 2007 Springer-Verlag, Berlin, Heidelberg
file_id: '18594'
file_name: Schindlmayr-Scheffler2007_Chapter_QuasiparticleCalculationsForPo.pdf
file_size: 649066
relation: main_file
title: Quasiparticle calculations for point defects at semiconductor surfaces
file_date_updated: 2020-08-30T15:42:34Z
has_accepted_license: '1'
intvolume: ' 104'
isi: '1'
language:
- iso: eng
page: 165-192
place: Berlin, Heidelberg
publication: Theory of Defects in Semiconductors
publication_identifier:
eisbn:
- 978-3-540-33401-9
eissn:
- 1437-0859
isbn:
- 978-3-540-33400-2
issn:
- 0303-4216
publication_status: published
publisher: Springer
quality_controlled: '1'
series_title: Topics in Applied Physics
status: public
title: Quasiparticle calculations for point defects at semiconductor surfaces
type: book_chapter
user_id: '458'
volume: 104
year: '2007'
...