Search

Your search keyword '"König T"' showing total 593 results
Start Over Author "König T"
593 results on '"König T"'

4. An active transverse energy filter to differentiate low energy particles with large pitch angles in a strong magnetic field

Author

Gauda, K., Schneidewind, S., Drexlin, G., Fulst, A., Hannen, V., König, T., Lokhov, A., Oelpmann, P., Ortjohann, H. -W., Pernice, W., Robertson, R. G. H., Salomon, R. W. J., Stappers, M., and Weinheimer, C.

Subjects
Physics - Instrumentation and Detectors
Abstract

We present the idea and proof of principle measurements for an angular-selective active filter for charged particles. The motivation for the setup arises from the need to distinguish background electrons from signal electrons in a spectrometer of MAC-E filter type. While a large fraction of the background electrons exhibit predominantly small angles relative to the magnetic guiding field (corresponding to a low amount of kinetic energy in the motion component transverse to the field lines, in the following referred to as transverse energy) and pass the filter mostly unhindered, signal electrons from an isotropically emitting source interact with the active filter and are detected. The concept is demonstrated using a microchannel plate (MCP) as an active filter element. When correctly aligned with the magnetic field, electrons with a small transverse energy pass the channels of the MCP without interaction while electrons with large transverse energies hit the channel walls and trigger an avalanche of secondary electrons that is subsequently detected. Due to several drawbacks of MCPs for an actual transverse energy filter, an alternative detection technique using microstructured Si-PIN diodes is proposed., Comment: 9 pages, 7 figures

Published
2022
Full Text
View/download PDF

14. Real-time phase-shift detection of the surface plasmon resonance

Author

König, T., Weidemüller, M., and Hemmerich, A.

Subjects
Physics - Optics
Abstract

We investigate a method to directly measure the phase of a laser beam reflected from a metallic film after excitation of surface plasmon polaritons. This method permits real time access to the phase information, it increases the possible speed of data acquisition, and it may thus prove useful for increasing the sensitivity of surface plasmon based sensors.

Published
2010
Full Text
View/download PDF

15. THE CONVECTIVE TRANSPORT OF ACTIVE SPECIES IN THE TROPICS (CONTRAST) EXPERIMENT

Author

Pan, L. L., Atlas, E. L., Salawitch, R. J., Honomichl, S. B., Bresch, J. F., Randel, W. J., Apel, E. C., Hornbrook, R. S., Weinheimer, A. J., Anderson, D. C., Andrews, S. J., Baidar, S., Beaton, S. P., Campos, T. L., Carpenter, L. J., Chen, D., Dix, B., Donets, V., Hall, S. R., Hanisco, T. F., Homeyer, C. R., Huey, L. G., Jensen, J. B., Kaser, L., Kinnison, D. E., Koenig, T. K., Lamarque, J.-F., Liu, C., Luo, J., Luo, Z. J., Montzka, D. D., Nicely, J. M., Pierce, R. B., Riemer, D. D., Robinson, T., Romashkin, P., Saiz-Lopez, A., Schauffler, S., Shieh, O., Stell, M. H., Ullmann, K., Vaughan, G., Volkamer, R., and Wolfe, G.

Published
2017

22. Electrophysiological Correlates of Reward Anticipation in Subjects with Schizophrenia: An ERP Microstate Study

Author

Perrottelli, A, Giordano, G M, König, T, Caporusso, E, Giuliani, L, Pezzella, P, Bucci, P, Mucci, A, and Galderisi, S

Subjects
610 Medicine & health
Abstract

The current study aimed to investigate alterations of event-related potentials (ERPs) microstate during reward anticipation in subjects with schizophrenia (SCZ), and their association with hedonic experience and negative symptoms. EEG data were recorded in thirty SCZ and twenty-three healthy controls (HC) during the monetary incentive delay task in which reward, loss and neutral cues were presented. Microstate analysis and standardized low-resolution electromagnetic tomography (sLORETA) were applied to EEG data. Furthermore, analyses correlating a topographic index (the ERPs score), calculated to quantify brain activation in relationship to the microstate maps, and scales assessing hedonic experience and negative symptoms were performed. Alterations in the first (125.0-187.5 ms) and second (261.7-414.1 ms) anticipatory cue-related microstate classes were observed. In SCZ, reward cues were associated to shorter duration and earlier offset of the first microstate class as compared to the neutral condition. In the second microstate class, the area under the curve was smaller for both reward and loss anticipation cues in SCZ as compared to HC. Furthermore, significant correlations between ERPs scores and the anticipation of pleasure scores were detected, while no significant association was found with negative symptoms. sLORETA analysis showed that hypo-activation of the cingulate cortex, insula, orbitofrontal and parietal cortex was detected in SCZ as compared to HC. Abnormalities in ERPs could be traced already during the early stages of reward processing and were associated with the anticipation of pleasure, suggesting that these dysfunctions might impair effective evaluation of incoming pleasant experiences. Negative symptoms and anhedonia are partially independent results.

Published
2023
Full Text
View/download PDF

23. An active transverse energy filter to differentiate low energy particles with large pitch angles in a strong magnetic field

Author

Gauda, K., primary, Schneidewind, S., additional, Drexlin, G., additional, Fulst, A., additional, Hannen, V., additional, König, T., additional, Lokhov, A., additional, Oelpmann, P., additional, Ortjohann, H.-W., additional, Pernice, W., additional, Robertson, R. G. H., additional, Salomon, R. W. J., additional, Stappers, M., additional, and Weinheimer, C., additional

Published
2022
Full Text
View/download PDF

32. Evaluation of PEG-L-asparaginase in asparagine suppression and anti-drug antibody development in healthy Beagle dogs: A multi-phase preclinical study

Author

Interne geneeskunde GD, IRAS OH Pharmacology, CS_Cancer, Feenstra, L.R., Gehring, R., Geijlswijk, Ingeborg Marianne van, König, T., Prinsen, H.C.M.T., Vandemeulebroecke, K., Lammens, T., Krupa, A., Teske, E., Interne geneeskunde GD, IRAS OH Pharmacology, CS_Cancer, Feenstra, L.R., Gehring, R., Geijlswijk, Ingeborg Marianne van, König, T., Prinsen, H.C.M.T., Vandemeulebroecke, K., Lammens, T., Krupa, A., and Teske, E.

Published
2022

35. Molecular Imaging of Myocardial Fibroblast Activation in Patients with Aortic Stenosis Undergoing Transcatheter Aortic Valve Implantation (TAVI)

Author

Diekmann, J., additional, Neuser, J., additional, König, T., additional, Derlin, T., additional, Zwadlo, C., additional, Tillmanns, J., additional, Berliner, D., additional, Kempf, T., additional, Ross, T., additional, Thackeray, J.T., additional, Widder, J., additional, Bauersachs, J., additional, and Bengel, F.M., additional

Published
2022
Full Text
View/download PDF

45. Complex Metal Nanostructures with Programmable Shapes from Simple DNA Building Blocks

Author

Ye, J., Aftenieva, O., Bayrak, T., Jain, A. R., König, T. A. F., Erbe, A., and Seidel, R.

Subjects
gold nanoparticles, Gold nanoparticles, seeded growth, shape programming, DNA origami, Seeded growth, DNA templating, Shape programming
Abstract

Advances in DNA nanotechnology allow the design and fabrication of highly complex DNA structures, uisng specific programmable interactions between smaller nucleic acid building blocks. To convey this concept to the fabrication of metallic nanoparticles, an assembly platform is developed based on a few basic DNA structures that can serve as molds. Programming specific interactions between these elements allows the assembly of mold superstructures with a range of different geometries. Subsequent seeded growth of gold within the mold cavities enables the synthesis of complex metal structures including tightly DNA-caged particles, rolling-pin- and dumbbell-shaped particles, as well as T-shaped and loop particles with high continuity. The method further supports the formation of higher-order assemblies of the obtained metal geometries. Based on electrical and optical characterizations, it is expected that the developed platform is a valuable tool for a self-assembly-based fabrication of nanoelectronic and nanooptic devices. �� 2021 The Authors. Advanced Materials published by Wiley-VCH GmbH

Published
2021
Full Text
View/download PDF

50. Remarkable Mechanochromism in Blends of a π-Conjugated Polymer P3TEOT: The Role of Conformational Transitions and Aggregation

Author

Zessin, J., Schnepf, M., Oertel, U., Beryozkina, T., König, T. A. F., Fery, A., Mertig, M., Kiriy, A., Zessin, J., Schnepf, M., Oertel, U., Beryozkina, T., König, T. A. F., Fery, A., Mertig, M., and Kiriy, A.

Abstract

A novel mechanism for well-pronounced mechanochromism in blends of a π-conjugated polymer based on reversible conformational transitions of a chromophore rather than caused by its aggregation state, is exemplified. Particularly, a strong stretching-induced bathochromic shift of the light absorption, or hypsochromic shift of the emission, is found in blends of the water-soluble poly(3-tri(ethylene glycol)) (P3TEOT) embedded into the matrix of thermoplastic polyvinyl alcohol. This counterintuitive phenomenon is explained in terms of the concentration dependency of the P3TEOT's aggregation state, which in turn results in different molecular conformations and optical properties. A molecular flexibility, provided by low glass transition temperature of P3TEOT, and the fact that P3TEOT adopts an intermediate, moderately planar conformation in the solid state, are responsible for the unusual complex mechanochromic behavior. © 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Published
2020

Catalog

Books, media, physical & digital resources
See catalog results