Krefting, Dagmar

[["dc.bibliographiccitation.artnumber","178301"],["dc.bibliographiccitation.issue","17"],["dc.bibliographiccitation.journal","Physical Review Letters"],["dc.bibliographiccitation.volume","102"],["dc.contributor.author","Krefting, Dagmar"],["dc.contributor.author","Kaira, Prabha"],["dc.contributor.author","Rotermund, Harm Hinrich"],["dc.date.accessioned","2021-09-17T10:19:54Z"],["dc.date.available","2021-09-17T10:19:54Z"],["dc.date.issued","2009-05-01"],["dc.description.abstract","Periodic forcing of chemical turbulence in the catalytic CO oxidation on Pt(110) can induce a period doubling cascade to chaos. Using a forcing frequency near the second harmonic of the system's natural frequency, and carefully increasing the forcing amplitude, the system successively exhibits spiral wave turbulence, resonant pattern formation, and chaotic oscillations. In the latter case, global coupling induces strong spatial correlation. Experimental results are presented as well as numerical simulations using a realistic model. Good agreement is found between experiment and theory. The results give further insight into the complex nature of reaction-diffusion systems and are of high importance regarding control strategies on such systems. The presented setup enhances the range of achievable dynamical states and allows for new experimental investigations on the dynamics of extended oscillatory systems."],["dc.identifier.doi","10.1103/PhysRevLett.102.178301"],["dc.identifier.pmid","19518840"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/89667"],["dc.language.iso","en"],["dc.relation.issn","0031-9007"],["dc.title","Period doubling and spatiotemporal chaos in periodically forced CO oxidation on Pt(110)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e29888"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","PLoS One"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Streitberger, Kaspar-Josche"],["dc.contributor.author","Sack, Ingolf"],["dc.contributor.author","Krefting, Dagmar"],["dc.contributor.author","Pfüller, Caspar"],["dc.contributor.author","Braun, Jürgen"],["dc.contributor.author","Paul, Friedemann"],["dc.contributor.author","Wuerfel, Jens"],["dc.date.accessioned","2021-09-17T10:19:34Z"],["dc.date.available","2021-09-17T10:19:34Z"],["dc.date.issued","2012"],["dc.description.abstract","Viscoelastic properties indicate structural alterations in biological tissues at multiple scales with high sensitivity. Magnetic Resonance Elastography (MRE) is a novel technique that directly visualizes and quantitatively measures biomechanical tissue properties in vivo. MRE recently revealed that early relapsing-remitting multiple sclerosis (MS) is associated with a global decrease of the cerebral mechanical integrity. This study addresses MRE and MR volumetry in chronic-progressive disease courses of MS."],["dc.identifier.doi","10.1371/journal.pone.0029888"],["dc.identifier.pmid","22276134"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/89663"],["dc.language.iso","en"],["dc.relation.eissn","1932-6203"],["dc.title","Brain viscoelasticity alteration in chronic-progressive multiple sclerosis"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","919"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Magnetic Resonance in Medicine"],["dc.bibliographiccitation.lastpage","924"],["dc.bibliographiccitation.volume","67"],["dc.contributor.author","Elgeti, Thomas"],["dc.contributor.author","Tzschätzsch, Heiko"],["dc.contributor.author","Hirsch, Sebastian"],["dc.contributor.author","Krefting, Dagmar"],["dc.contributor.author","Klatt, Dieter"],["dc.contributor.author","Niendorf, Thoralf"],["dc.contributor.author","Braun, Jürgen"],["dc.contributor.author","Sack, Ingolf"],["dc.date.accessioned","2021-09-17T10:19:31Z"],["dc.date.available","2021-09-17T10:19:31Z"],["dc.date.issued","2012-04"],["dc.description.abstract","Vibration synchronized magnetic resonance imaging of harmonically oscillating tissue interfaces is proposed for cardiac magnetic resonance elastography. The new approach exploits cardiac triggered cine imaging synchronized with extrinsic harmonic stimulation (f = 22.83 Hz) to display oscillatory tissue deformations in magnitude images. Oscillations are analyzed by intensity threshold-based image processing to track wave amplitude variations over the cardiac cycle. In agreement to literature data, results in 10 volunteers showed that endocardial wave amplitudes during systole (0.13 ± 0.07 mm) were significantly lower than during diastole (0.34 ± 0.14 mm, P < 0.001). Wave amplitudes were found to decrease 117 ± 40 ms before myocardial contraction and to increase 75 ± 31 ms before myocardial relaxation. Vibration synchronized magnetic resonance imaging improves the temporal resolution of magnetic resonance elastography as it overcomes the use of extra motion encoding gradients, is less sensitive to susceptibility artifacts, and does not suffer from dynamic range constraints frequently encountered in phase-based magnetic resonance elastography."],["dc.identifier.doi","10.1002/mrm.24185"],["dc.identifier.pmid","22294295"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/89662"],["dc.language.iso","en"],["dc.relation.eissn","1522-2594"],["dc.relation.issn","0740-3194"],["dc.title","Vibration-synchronized magnetic resonance imaging for the detection of myocardial elasticity changes"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","174301"],["dc.bibliographiccitation.issue","17"],["dc.bibliographiccitation.journal","Physical Review Letters"],["dc.bibliographiccitation.volume","91"],["dc.contributor.author","Krefting, D."],["dc.contributor.author","Mettin, Robert"],["dc.contributor.author","Lauterborn, Werner"],["dc.date.accessioned","2018-11-07T10:35:26Z"],["dc.date.available","2018-11-07T10:35:26Z"],["dc.date.issued","2003"],["dc.description.abstract","Single bubble sonoluminescence (SBSL) is realized in air-saturated water at ambient pressure and room temperature. The behavior is similar to SBSL in degassed water, but with a higher spatial variability of the bubble position. A detailed view on the dynamics of the bubbles shows agreement between calculated shape stability borders but differs slightly in the equilibrium radii predicted by a mass diffusion model. A comparison with results in degassed water is done as well as a time resolved characterization of bubble oscillation, translation, and light emission for synchronous and recycling SBSL. The formation of streamer structures is observed in the same parameter range, when bubble nuclei are present. This may lead to a unified interpretation of SBSL and multibubble sonoluminescence."],["dc.identifier.doi","10.1103/PhysRevLett.91.174301"],["dc.identifier.isi","000186138300024"],["dc.identifier.pmid","14611352"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/45096"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","American Physical Soc"],["dc.relation.issn","0031-9007"],["dc.title","Single-bubble sonoluminescence in air-saturated water"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","326"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Future Generation Computer Systems"],["dc.bibliographiccitation.lastpage","336"],["dc.bibliographiccitation.volume","25"],["dc.contributor.author","Krefting, Dagmar"],["dc.contributor.author","Bart, Julian"],["dc.contributor.author","Beronov, Kamen"],["dc.contributor.author","Dzhimova, Olga"],["dc.contributor.author","Falkner, Jürgen"],["dc.contributor.author","Hartung, Michael"],["dc.contributor.author","Hoheisel, Andreas"],["dc.contributor.author","Knoch, Tobias A."],["dc.contributor.author","Lingner, Thomas"],["dc.contributor.author","Mohammed, Yassene"],["dc.contributor.author","Peter, Kathrin"],["dc.contributor.author","Rahm, Erhard"],["dc.contributor.author","Sax, Ulrich"],["dc.contributor.author","Sommerfeld, Dietmar"],["dc.contributor.author","Steinke, Thomas"],["dc.contributor.author","Tolxdorff, Thomas"],["dc.contributor.author","Vossberg, Michal"],["dc.contributor.author","Viezens, Fred"],["dc.contributor.author","Weisbecker, Anette"],["dc.date.accessioned","2021-10-22T11:02:55Z"],["dc.date.available","2021-10-22T11:02:55Z"],["dc.date.issued","2009"],["dc.identifier.doi","10.1016/j.future.2008.05.005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/91227"],["dc.identifier.url","https://publications.goettingen-research-online.de/handle/2/17267"],["dc.relation.issn","0167-739X"],["dc.relation.orgunit","Gesellschaft für wissenschaftliche Datenverarbeitung"],["dc.title","MediGRID: Towards a user friendly secured grid infrastructure"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Ritter, Zully"],["dc.contributor.author","Vogel, Stefan"],["dc.contributor.author","Schultze, Frank"],["dc.contributor.author","Pischek-Koch, Kerstin"],["dc.contributor.author","Schirrmeister, Wiebke"],["dc.contributor.author","Walcher, Felix"],["dc.contributor.author","Röhrig, Rainer"],["dc.contributor.author","Kesztyüs, Tibor"],["dc.contributor.author","Krefting, Dagmar"],["dc.contributor.author","Blaschke, Sabine"],["dc.contributor.editor","Séroussi, Brigitte"],["dc.contributor.editor","Weber, Patrick"],["dc.contributor.editor","Dhombres, Ferdinand"],["dc.contributor.editor","Grouin, Cyril"],["dc.contributor.editor","Liebe, Jan-David"],["dc.contributor.editor","Pelayo, Sylvia"],["dc.contributor.editor","Pinna, Andrea"],["dc.contributor.editor","Rance, Bastien"],["dc.contributor.editor","Sacchi, Lucia"],["dc.contributor.editor","Ugon, Adrien"],["dc.contributor.editor","Benis, Arriel"],["dc.contributor.editor","Gallos, Parisis"],["dc.date.accessioned","2022-06-01T09:39:49Z"],["dc.date.available","2022-06-01T09:39:49Z"],["dc.date.issued","2022"],["dc.identifier.doi","10.3233/SHTI220529"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/108571"],["dc.notes.intern","DOI-Import GROB-572"],["dc.publisher","IOS Press"],["dc.relation.crisseries","Studies in Health Technology and Informatics"],["dc.relation.eisbn","9781643682853"],["dc.relation.isbn","9781643682846"],["dc.relation.ispartof","Challenges of Trustable AI and Added-Value on Health : Proceedings of MIE 2022"],["dc.title","Using Explainable Artificial Intelligence Models (ML) to Predict Suspected Diagnoses as Clinical Decision Support"],["dc.type","book_chapter"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1918"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","The Journal of the Acoustical Society of America"],["dc.bibliographiccitation.lastpage","1927"],["dc.bibliographiccitation.volume","112"],["dc.contributor.author","Krefting, D."],["dc.contributor.author","Mettin, Robert"],["dc.contributor.author","Lauterborn, Werner"],["dc.date.accessioned","2018-11-07T09:53:20Z"],["dc.date.available","2018-11-07T09:53:20Z"],["dc.date.issued","2002"],["dc.description.abstract","Sonoluminescing single bubbles driven simultaneously by two harmonic frequencies were recently reported to increase the maximum light output up to a factor of 3 with respect to single mode excitation. In this paper, experimental and numerical results on single-bubble sonoluminescence (SBSL) in an air/water system using the fundamental mode of 25 kHz and the second harmonic at 50 kHz are presented. The region of light emission is mapped in the three-dimensional parameter space spanned by the two driving pressure amplitudes and their relative phase. Good agreement was seen between measured light output, maximum bubble radius, and stability boundaries and the numerical model which is based on spherical bubble oscillations regarding diffusive and shape stability. The maximum brightness was enhanced by a factor up to 2.5 with respect to single mode SBSL. However, long-term measurements reveal great variation of the emission at fundamental mode driven SBSL and of the boost factor reached with two frequencies. The overall brightness maxima of both excitation methods within a period of several hours turn out to show little difference. (C) 2002 Acoustical Society of America."],["dc.identifier.doi","10.1121/1.1509427"],["dc.identifier.isi","000178870100017"],["dc.identifier.pmid","12430803"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/36312"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Acoustical Soc Amer Amer Inst Physics"],["dc.relation.issn","0001-4966"],["dc.title","Two-frequency driven single-bubble sonoluminescence"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","959"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Physiological Measurement"],["dc.bibliographiccitation.lastpage","975"],["dc.bibliographiccitation.volume","38"],["dc.contributor.author","Krefting, Dagmar"],["dc.contributor.author","Jansen, Christoph"],["dc.contributor.author","Penzel, Thomas"],["dc.contributor.author","Han, Fang"],["dc.contributor.author","Kantelhardt, Jan W."],["dc.date.accessioned","2021-09-17T10:19:03Z"],["dc.date.available","2021-09-17T10:19:03Z"],["dc.date.issued","2017-05"],["dc.description.abstract","Recently, time delay stability analysis of biosignals has been successfully applied as a multivariate time series analysis method to assess the human physiological network in young adults. The degree of connectivity between different network nodes is described by the so-called link strength. Based on polysomnographic recordings (PSGs), it could be shown that the network changes with the sleep stage. Here, we apply the method to a large set of healthy controls spanning six decades of age. As it is well known, that the overall sleep architecture is dependent both on age and on gender, we particularly address the question, if these changes are also found in the network dynamics. We find moderate dependencies of the network on gender. Significantly higher link strengths up to 13% are found in women for some links in different frequency bands of central and occipital regions in REM and light sleep (N2). Higher link strengths are found in men consistently in cardio-cerebral links in N2, but not significant. Age dependency is more pronounced. In particular a significant overall weakening of the network with age is found for wakefulness and non-REM sleep stages. The largest overall decrease is observed in N2 with 0.017 per decade. For individual links decrease rates up to 0.08 per decade are found, in particular for intra-brain links in non-REM sleep. Many of them show a significant decrease with age. Non-linear regression employing an artificial neural network can predict the age with a mean absolute error (MAE) of about five years, suggesting that an age-resolution of about a decade would be appropriate in normative data for physiological networks."],["dc.identifier.doi","10.1088/1361-6579/aa614e"],["dc.identifier.pmid","28212113"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/89655"],["dc.language.iso","en"],["dc.relation.eissn","1361-6579"],["dc.relation.issn","0967-3334"],["dc.title","Age and gender dependency of physiological networks in sleep"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1174"],["dc.bibliographiccitation.journal","Future Generation Computer Systems"],["dc.bibliographiccitation.lastpage","1176"],["dc.bibliographiccitation.volume","112"],["dc.contributor.author","Carretero, Jesus"],["dc.contributor.author","Krefting, Dagmar"],["dc.date.accessioned","2021-04-14T08:32:03Z"],["dc.date.available","2021-04-14T08:32:03Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1016/j.future.2020.07.058"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/83789"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.issn","0167-739X"],["dc.title","New Parallel and Distributed Tools and Algorithms for Life Sciences"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","711"],["dc.bibliographiccitation.issue","Suppl. 2"],["dc.bibliographiccitation.journal","Multiple Sclerosis Journal"],["dc.bibliographiccitation.lastpage","712"],["dc.bibliographiccitation.volume","27"],["dc.contributor.author","Fneish, F."],["dc.contributor.author","Frahm, N."],["dc.contributor.author","Ellenberger, D."],["dc.contributor.author","Flachenecker, P."],["dc.contributor.author","Friede, T."],["dc.contributor.author","Kleinschnitz, C."],["dc.contributor.author","Krefting, D."],["dc.contributor.author","Zettl, U."],["dc.contributor.author","Stahmann, A."],["dc.date.accessioned","2021-12-06T15:44:31Z"],["dc.date.available","2021-12-06T15:44:31Z"],["dc.date.issued","2021"],["dc.identifier.isi","000706771302242"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/95259"],["dc.relation.conference","37th Congress of the European Committee for Treatment and Research in Multiple Sclerosis (ECTRIMS 2021)"],["dc.relation.eventend","2021-10-15"],["dc.relation.eventlocation","virtual"],["dc.relation.eventstart","2021-10-13"],["dc.title","Treatment patterns of patients with aggressive MS in a cohort of early retirees"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]