3 research outputs found
Observation of the Efimov state of the helium trimer
Quantum theory dictates that upon weakening the two-body interaction in a
three-body system, an infinite number of three-body bound states of a huge
spatial extent emerge just before these three-body states become unbound. Three
helium atoms have been predicted to form a molecular system that manifests this
peculiarity under natural conditions without artificial tuning of the
attraction between particles by an external field. Here we report experimental
observation of this long predicted but experimentally elusive Efimov state of
He by means of Coulomb explosion imaging. We show spatial images of
an Efimov state, confirming the predicted size and a typical structure where
two atoms are close to each other while the third is far away
Cognitive-behavioral therapy of school refusal: School phobia and school anxiety
Die Arbeit gibt einen Überblick über aktuelle kognitiv-verhaltenstherapeutische Behandlungsansätze nicht dissozialer Schulverweigerung (Schulphobie und Schulangst) bei Kindern und Jugendlichen. Einleitend wird der Problembereich definiert sowie der Stand des Wissens zu Prävalenz, Verlauf und Risikofaktoren dargestellt. Den Schwerpunkt der Arbeit stellt die psychotherapeutische Behandlung von Schulphobie und Schulangst dar. Neben allgemeinen Behandlungsprinzipien wird auf die wichtigsten verhaltenstherapeutischen Techniken sowie auf kognitivverhaltenstherapeutische Behandlungsprogramme eingegangen. Es folgt eine ausführliche Beschreibung des Stands der Wirksamkeitsforschung. Schließlich wird praxisnah der Ablauf der Diagnostik, Therapieplanung und -durchführung dargestellt.(DIPF/Orig.)The study provides an overview of current cognitive-behavioral interventions to treat school-refusal in children and adolescents. First of all we define the problem area and describe the standard of knowledge about prevalence, course and risk factors. The main focus of our work is presented by psychotherapeutic treatments of school phobia and school anxiety. Apart from general treatment principles we give a survey of the most important behavioral therapeutic as well as cognitive-behavioral therapeutic treatments. In addition, we provide a detailed description of current research about efficacy. After all we characterize diagnostic, treatment planning and implementation.(DIPF/Orig.