Effect of electron-phonon interaction on the formation of one-dimensional electronic states in coupled Cl vacancies

The formation of extended electron states in one-dimensional nanostructures is of key importance for the function of molecular electronics devices. Here we study the effects of strong electron-phonon interaction on the formation of extended electronic states in intentionally created Cl vacancy pairs and chains in a NaCl bilayer on Cu(111). The interaction between the vacancies was tailored by fabricating vacancy pairs and chains of different orientation and separation with atomic precision using vertical manipulation. Small separation of divacancies led to the formation of symmetric and antisymmetric vacancy states and localized interface-states. By scanning tunneling spectroscopy (STS) we measured their energy splitting and broadening as a function of the inter-vacancy separation. Unexpectedly, the energy splitting between the vacancy states is enlarged by level repulsion resulting from phonon dressing of the electronic states, as evidenced by theory. Already for a few coupled vacancies we observe an emerging band structure of the defect band.Comment: 9 pages, 4 figure

Identification of new mutations in the adenylosuccinate lyase gene associated with impaired enzyme activity in lymphocytes and red blood cells

AbstractWe determined the DNA sequence of the adenylosuccinate lyase (ASL) gene from a 13 year-old female, who showed a reduced ASL enzymatic activity in lymphocytes and red blood cells and suffered from severe psychomotor retardation. The patient was the offspring of a non-consanguineous marriage. She was found to be compound heterozygous for two missense-mutations located on different alleles (C300–G and G1266–T): the first mutation replaces Pro75 by Ala, the second mutation replaces Asp397 by Tyr

Holographic vibrometry: Full field holographic vibrometry at ultimate limits

International audienceHeterodyne holography is an extremely versatile and powerful holographic technique that is able to fully control the amplitude, phase and frequency of both the illumination and holographic reference beams. Applied to vibration analysis, this technique is able to detect the signal of the carrier or the one of any vibration sideband. A complete analysis of the vibration signal can thus be made, and 2D map of the vibration amplitude and phase in all points of the surface of the vibrating object can be obtained. Since the sensitivity is limited by shot noise, extremely low vibration amplitude (< 0.01 nm) can be studied

CT-guided biopsy of lung lesions: defining the best needle option for a specific diagnosis

OBJECTIVES: To evaluate the performance of fine and cutting needles in computed tomography guided-biopsy of lung lesions suspicious for malignancy and to determine which technique is the best option for a specific diagnosis. METHODS: This retrospective study reviewed the data from 362 (71.6%) patients who underwent fine-needle aspiration biopsy and from 97 (19.7%) patients who underwent cutting-needle biopsy between January 2006 and December 2011. The data concerning demographic and lesion characteristics, procedures, biopsy sample adequacy, specific diagnoses, and complications were collected. The success and complication rates of both biopsy techniques were calculated. RESULTS: Cutting-needle biopsy yielded significantly higher percentages of adequate biopsy samples and specific diagnoses than did fine-needle aspiration biopsy (

Praktizierte Humanität im Krieg und bei Katastrophen : das Rote Kreuz zwischen Anspruch und Wirklichkeit

Im Sommersemester 2011 fand an der Eberhard Karls Universität Tübingen im Rahmen des Studium Generale eine Vortragsreihe unter dem Titel „Praktizierte Humanität im Krieg und bei Katastrophen – Rotes Kreuz zwischen Anspruch und Wirklichkeit“ statt. Unterstützt wurde das Projekt des Kreisverbands „Rotes Kreuz Tübingen“ von Prof. Dr. Thomas Potthast vom Internationalen Zentrum für Ethik in den Wissenschaften (IZEW). Die Vorträge der verschiedenen Referenten und Referentinnen zu Historie, aktuellen Einsatzszenarien, nachhaltiger Entwicklungsarbeit sowie ethischen Werten und moralische Grenzen des Roten Kreuz wurden thematisiert, diskutiert und in vorliegendem Band veröffentlicht. Darin beinhaltet sind zudem kurze Porträts der Autoren und Autorinnen.In the summer semester of 2011, a lecture series entitled "Practiced Humanity in war and disasters – Rotes Kreuz between demand and reality" took place at the Eberhard Karls University Tübingen within the framework of the Studium Generale. The project of the district association "Rotes Kreuz Tübingen" was supported by Prof. Dr. Thomas Potthast of the International Centre for Ethics in the Sciences and Humanities (IZEW). The lectures of the various speakers on history, current deployment scenarios, sustainable development work, ethical values and moral limits of the Rotes Kreuz were thematized, discussed and published in this volume. It also contains short portraits of the authors

Negative heat capacity in the critical region of nuclear fragmentation: an experimental evidence of the liquid-gas phase transition

An experimental indication of negative heat capacity in excited nuclear systems is inferred from the event by event study of energy fluctuations in $Au$ quasi-projectile sources formed in $Au+Au$ collisions at 35 A.MeV. The excited source configuration is reconstructed through a calorimetric analysis of its de-excitation products. Fragment partitions show signs of a critical behavior at about 5 A.MeV excitation energy. In the same energy range the heat capacity shows a negative branch providing a direct evidence of a first order liquid gas phase transition.Comment: 4 Postscript figures, submitted to Phys. Rev. Lett. on 14-apr-199

Quantifying the impact of OSS adoption risks with the help of i* Models

Adopting Open Source Software (OSS) components in organisational settings requires evaluating the possible impact of adoption decisions on business goals. Measures available in OSS, capturing indicators such as the quality of open source code and the activeness of the developing community, can be used as a driver to assess various risks in component adoption. In this paper we illustrate how risk and impact models are used to relate measures obtained from the component under analysis to business goals in i* -based OSS business strategy models.Postprint (author’s final draft

Experimental Signals of Phase Transition

The connection between the thermodynamics of charged finite nuclear systems and the asymptotically measured partitions is presented. Some open questions, concerning in particular equilibrium partitions are discussed. We show a detailed comparison of the decay patterns in Au+ C,Cu,Au central collisions and in Au quasi-projectile events. Observation of abnormally large fluctuations in carefully selected samples of data is reported as an indication of a first order phase transition (negative heat capacity) in the nuclear equation of state.Comment: 8 pages, 8th International Conference on Nucleus-Nucleus Collisions, Moscow 200