HESEB The Helmholtz state of the art Soft X Ray Undulator beamline at SESAME

SESAME and a consortium of five Helmholtz Centers are designing and installing a state of the art soft X Ray undulator beamline at the SESAME light source in Amman, Jordan. Funding is provided by the Helmholtz Association over a four year project cycle that started in January 2019. This is an interim report covering the first 36 months of the project where the construction and installation has been almost completed and commissioning and characterization of the beamline is about to start. Additionally, seminars, workshops, and a training program are part of the project aimed at establishing a broad user communit

Increased ventral premotor cortex recruitment after arm training in an fMRI study with subacute stroke patients

To investigate therapy associated changes in the cerebral representation of movement after stroke, we used functional magnetic resonance imaging (fMRI) during an active and a passive motor task for the affected and unaffected hand before and after a three week comprehensive hand motor training

Prolonged motor skill learning - a combined behavioural training and theta burst TMS study

Purpose: To assess the behavioural effects of prolonged motor practice in healthy volunteers, and the specific impact of inhibiting different motor-related brain regions in the late phase of motor learning using continuous theta burst transcranial magnetic stimulation (cTBS). Methods: Twelve subjects trained their non-dominant arm in eight arm motor tasks (Arm Ability Training, AAT) once a day for three weeks (16 sessions). During the last four days, training was performed before and after applying cTBS to either M1, S1, SMA, or PMC. Results: The AAT induced substantial and robust motor learning for the trained arm with variations across tasks. Considerable motor learning was also observed in the non-trained dominant arm with remarkably similar variations across tasks, suggesting that practise improved common underlying sensorimotor capacities (abilities) in addition to effector-specific effects. When applied after prolonged training, inhibitory cTBS showed no detrimental effects on motor performance/learning; M1 cTBS even improved performance in a labyrinth task. Conclusions: Prolonged training with the non-dominant arm led to profound motor learning across abilities with transfer to the non-trained dominant arm. Unlike during early stages of motor learning, no detrimental effect of cTBS over M1, S1, PMC, or SMA could be substantiated after prolonged motor practice

Nichtlineare Dynamik bei chemischen Prozessen. Projekt A: Oertlich verteilte periodische Prozesse. Teilprojekt A3I: Katalytische Nachverbrennung im Zirkulationsreaktor Nichtlineare periodische Frontwanderungsprozesse. Schlussbericht

The catalytic conversion of a HC/CHC mixture in a travelling reaction front was investigated in order to apply the circulation reactor principle to the catalytic afterburning of CHC-burdened off-gas. The sub-project 'circulating reaction zones' comprised a model-supported analysis and synthesis for establishing process control concepts using the methods of nonlinear dynamics. The experiment showed that the circulation reactor adjusts to different states of operation autonomously. The region of stable oscillation shifts as a result of (reversible) deactivation of the catalyst. With suitable process control measures, the position-dependent maximum temperature of the circulating reaction front can be kept within the catalyst-specific limiting values for total oxidation resp. catalyst damage. On the basis fo the investigations, a technically mature concept for use of the circulation reactor for decomposition of hard-to-crack pollutants was obtained provided that a suitable catalyst is available. The main field of application is the catalytic afterburning of varying pollutant volumes in low-volume off-gas streams in order to make use of the autonomous adaptation of the reactor to a new operating state in case of changing reaction conditionsIm Rahmen dieses Teilprojektes wurde die katalytische Zersetzung eines Kohlenwasserstoff-Chlorkohlenwasserstoff-Gemischs in wandernder Reaktionsfront untersucht, um das Prinzip des Zirkulationsreaktors auf die katalytische Nachverbrennung von CKW-haltigen Abgasen anzuwenden. Im Teilprojekt 'Zirkulierende Reaktionszonen' erfolgte die modellgestuetzte Analyse und Synthese zur Ableitung von Prozessfuehrungskonzepten mit den Methoden der nichtlinearen Dynamik. Bei den Versuchen konnte ein autonomes Einschwingen des Zirkulationsreaktors auf verschiedene Betriebszustaende experimentell nachgewiesen werden. Der Bereich stabiler Oszillation verschiebt sich infolge (reversibler) Desaktivierung des Katalysators. Mit geeigneten Massnahmen zur Prozessfuehrung kann das ortsabhaengige Temperaturmaximum der zirkulierenden Reaktionsfront innerhalb der katalysatorspezifischen Grenztemperaturen fuer Totaloxidation bzw. Katalysatorschaedigung gehalten werden. Aus den Untersuchungen resultiert ein anwendungsbereites Konzept fuer den Einsatz des Zirkulationsreaktors zur Zersetzung schwerspaltbarer Schadstoffe. Vorauszusetzen ist die Verfuegbarkeit eines geeigneten Katalysators. Als bevorzugter Einsatzfall wird die katalytische Nachverbrennung wechselnder Schadstoffmengen in kleinen Abgasstroemen betrachtet, um das autonome Einschwingen des Reaktors in einen neuen Betriebszustand bei veraenderten Eingangsbedingungen vorteilhaft zu nutzen. (orig.)SIGLEAvailable from TIB Hannover: DtF QN1(65,5) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman