10 research outputs found

    Phenomenology of Neutrinos and Possible SO(10) Origins of Fermion Masses and Mixings

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    Important but yet unanswered questions in neutrino physics are the neutrino mass hierarchy, precision determination of mixings and CP violation. A widely studied mixing scheme upon which many models are based is tri-bimaximal mixing. We emphasize the importance of alternative mixing schemes and confront their predictions with current data on neutrino mixings. Where necessary we show how perturbations of the leading order predictions can result in viable schemes. Further we study the prospects to test the inverted hierarchy with neutrinoless double beta decay. We find that the lower limit of the effective neutrino mass relevant for this process and hence the prospects to experimentally exclude the inverted hierarchy are highly sensitive to the neutrino mixing angle theta(12). We further take into account uncertainties from nuclear physics. Next we analyze the possibility to explain the origin of fermion masses and mixings as well as the baryon asymmetry within renormalizable Grand Unified Theories based on SO(10), including effects of renormalization group evolution. Models with different Higgs representations are considered. After constraining the model parameters with experimental data we give the model predictions for undetermined observables; for the leptonic CP violating phase we also show the ranges allowed at 68% C.L

    Untersuchung der Modulation motorkortikaler Exzitabilität mittels transkranieller Magnetstimulation während der Durchführung eines Go/NoGo-Paradigmas bei freiwilligen erwachsenen Probanden mit und ohne Methylphenidat

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    Die Modulation der motorkortikalen Exzitabilität, repräsentiert durch die MEP-Amplitude über dem ID-I, durch motorische (transkranielle Magnetstimulation), aufgabenbezogene bzw. behaviorale (Continous Performance Test) und pharmakologische (Methylphenidat) Faktoren wird an 31 gesunden Erwachsenen untersucht und eine Interaktion aller drei Faktoren im Sinne einer signifikanten Wechselwirkung zweiter Ordnung nachgewiesen. Die Aufgabe zur Aufmerksamkeit und hier die fazilitierende Bedingung scheint einen besonders großen modulierenden Effekt zu haben

    Attitudes toward innovative mental health treatment approaches in Germany: E-mental health and home treatment

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    E-mental health and home treatment are treatment approaches that have proven to be effective, but are only slowly implemented in the German health care system. This paper explores the attitudes toward these innovative treatment approaches. Data was collected in two large, non-clinical samples representative of the German population in spring 2020 (N = 2,503) and winter 2020/2021 (N = 2,519). Statistical associations between variables were examined using two-tailed tests. Binary and multinomial logistic regressions were performed to predict attitudes toward online-based treatment concepts and home treatment approaches. Only few (<20%) people preferred online-based treatment approaches, while a larger proportion (~50%) could imagine being treated at home. Overall, younger subjects were more open to online-therapy approaches, while people with lower education preferred more often a traditional therapy setting. Acceptance of online-therapy did not raise significantly during the first months of the COVID-19 pandemic. When different online-based treatment options were available, the probability of accepting home treatment significantly increased with increasing levels of therapeutic support. Further promotion of acceptance for online-therapy and home treatment seems to be necessary. In the future, more information on innovative treatment approaches should be actively provided

    Efficient and long-lived quantum memory with cold atoms inside a ring cavity

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    Quantum memories are regarded as one of the fundamental building blocks of linear-optical quantum computation and long-distance quantum communication. A long standing goal to realize scalable quantum information processing is to build a long-lived and efficient quantum memory. There have been significant efforts distributed towards this goal. However, either efficient but short-lived or long-lived but inefficient quantum memories have been demonstrated so far. Here we report a high-performance quantum memory in which long lifetime and high retrieval efficiency meet for the first time. By placing a ring cavity around an atomic ensemble, employing a pair of clock states, creating a long-wavelength spin wave, and arranging the setup in the gravitational direction, we realize a quantum memory with an intrinsic spin wave to photon conversion efficiency of 73(2)% together with a storage lifetime of 3.2(1) ms. This realization provides an essential tool towards scalable linear-optical quantum information processing.Comment: 6 pages, 4 figure

    Robust frequency-based monetary policy rules

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    Optimal monetary policy studies typically rely on a single structural model and identification of model-specific rules that minimize the unconditional volatilities of inflation and real activity. In their proposed approach, the authors take a large set of structural models and look for the model-robust rules that minimize the volatilities at those frequencies that policymakers are most interested in stabilizing. Compared to the status quo approach, their results suggest that policymakers should be more restrained in their inflation responses when their aim is to stabilize inflation and output growth at specific frequencies. Additional caution is called for due to model uncertainty

    Elektrokonvulsionstherapie im Kindes- und Jugendalter

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    &lt;jats:p&gt;Zusammenfassung. Hintergrund und Zielsetzung: Die Elektrokonvulsionstherapie (EKT) ist ein hoch wirksames und in der Erwachsenenpsychiatrie gut untersuchtes Therapieverfahren, das gerade bei schwerwiegenden depressiven und psychotischen Erkrankungen erfolgreich eingesetzt wird. Obwohl schwere Krankheitsverläufe auch im kinder- und jugendpsychiatrischen Bereich vorkommen, erfolgt ein Einsatz der EKT hier deutlich seltener. Dies liegt womöglich auch daran, dass kaum systematisch erhobene Daten zur Anwendung, Wirksamkeit und Verträglichkeit der EKT bei kinder- und jugendpsychiatrischen Patient_innen existieren. Ziel dieser Arbeit ist die Untersuchung und Darstellung von Krankheitsverläufen unter EKT-Behandlung im kinder- und jugendpsychiatrischen Bereich und damit eine Vergrößerung der bestehenden Datenbasis zu diesem Thema. Methoden: Es erfolgte eine retrospektive Erhebung zur EKT bei unter 18-jährigen Patient_innen an drei deutschen universitären Zentren. Hier wurden alle dokumentierten Fälle erfasst und auf Wirksamkeit und Verträglichkeit hin untersucht. Darüber hinaus erfolgte eine umfassende PubMed-basierte Datenbankrecherche. Ergebnisse und Schlussfolgerungen: International existieren keine Meta-Analysen oder kontrollierte randomisierte Studien und aus Deutschland kaum veröffentlichte Fälle zum Thema Elektrokonvulsionstherapie in der Kinder- und Jugendpsychiatrie. Unsere Daten zur EKT bei 29 12- bis 17-jährigen Patient_innen zeigen eine gute Wirksamkeit. Nebenwirkungen traten selten auf. Es ergaben sich keine Hinweise auf Unterschiede bezüglich Indikation (Depression, Katatonie, Schizophrenie), Wirksamkeit, negative Prädiktoren und Verträglichkeit einer EKT zwischen erwachsenen und minderjährigen Patient_innen. Die Ergebnisse deuten zudem darauf hin, dass der Einsatz der EKT bei Adoleszenten früher im therapeutischen Prozess in Erwägung gezogen werden sollte.&lt;/jats:p&gt

    Energy levels of A = 21–44 nuclei (VII)

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    Energy levels of A = 21–44 nuclei (VI)

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