69 research outputs found
On a biphononic origin of the 1125 cm^(-1) absorption band in cuprous oxide
We report on the IR spectroscopic studies in both reflection (50-900 cm^{-1})
and transmission (900-3000 cm^{-1}) mode of the vibration spectrum of the
cuprous oxide. A detailed analysis based on a comparison of the temperature
dependences of the absorption band at 1125 cm^{-1} and of IR and Raman active
fundamental vibrations results in assignment of the former to a biphonon.Comment: 5 pages, 5 figures (to appear in Phys.Lett. A
Entangled Wavefunctions from Classical Oscillator Amplitudes
In the first days of quantum mechanics Dirac pointed out an analogy between
the time-dependent coefficients of an expansion of the Schr\"odinger equation
and the classical position and momentum variables solving Hamilton's equations.
Here it is shown that the analogy can be made an equivalence in that, in
principle, systems of classical oscillators can be constructed whose position
and momenta variables form time-dependent amplitudes which are identical to the
complex quantum amplitudes of the coupled wavefunction of an N-level quantum
system with real coupling matrix elements. Hence classical motion can reproduce
quantum coherence.Comment: extended versio
Langzeiteffekte einer stadienspezifischen kognitiven Intervention fĂŒr Patienten mit leichter kognitiver Störung und leichtgradiger Alzheimer Demenz
Langzeiteffekte einer stadienspezifischen kognitiven Intervention fĂŒr Patienten mit leichter kognitiver Störung und leichtgradiger Alzheimer Demenz
Summer Universities for Women in Computer Science
A cross-university approach will be discussed that reflects moneducation, networking, and gender oriented organizational reforms in university programs. The concept was developed in Germany in 1997 as a national approach. Each year âInformatica Feminaleâ (www. Informatica-feminale.de) attracts more than 70 female lectures from universities, research, or industry to give courses on all topics of computer science oriented to the existing university curricula. Participants are female students as well as women interested in further education. The approach has won an European award for best practice. Since 2003 Austria provides a similar project called the âditact-womenâs IT summer studiesâ (www.ditact.ac.at). Another project will be located in New Zealand in 2005 as the âComputing Women Conferenceâ (www/ cwc.org.nz)
Uptake and localization of fluorescent labelled gold nanoparticles in living zebrafish (Danio rerio) using Light Sheet Microscopy
Resonant two-photon excitation of 1s paraexcitons in Cuprous Oxide
We have created paraexcitons in Cuprous Oxide via resonant two-photon
generation, and examined their population dynamics by means of time-correlated
single photon detection. Confining the excitons to a constant volume in a
harmonic potential trap made with inhomogeneous applied stress along the [001]
axis, we find that paraexcitons are created directly, and orthoexcitons appear
primarily through the well-known excitonic Auger process. Hot excitons are also
created via a three-photon process when the IR laser is non-resonant. Also we
generate excitons with two colliding pulses, and the luminescence is weaker
than that from one beam excitation with same total laser power. These results
show that resonant one-beam two-photon generation of paraexcitons is a
promising way to pursue Bose-Einstein condensation of paraexcitons.Comment: 22 pages, 9 figure
Planning and Decision Support Tools for Integrated Water Resources Management (IWRM) on River Basin Level in the Southeast-Asian Region on the Example of Vietnam - Tools for Water Quantity and Quality Risk Assessment
Kollaborationstechnologien in DAX30 Konzernen - Wie relevant ist die gezielte Endnutzeraktivierung bei und nach EinfĂŒhrung von Microsoft Teams und Co.?
In a fast-evolving world, technological innovations can disrupt existing processes and behaviors. The rising trend of digital collaboration brings new possibilities through technology and can have a significant impact on organizations and their employees. But during the implementation, decision makers tend to focus on the IT-part, leaving their employees with a new application with a broad range of functions which they donât know what to do with. The new tool also can have complex implications on the way of working and must be learnt from the technical side. This results in the question, whether an individual end-user activation with a comprehensive change management and learning activities would be necessary for the implementation, which will be answered in this thesis âCollaboration technologies in DAX30 companies - How important is a targeted end-user activation during and after the implementation of Microsoft Teams and Co.?â. In order to cover the different aspects of a targeted end user activation the topic was split up into three research questions: 1. How should the skills and attitudes of employees change, so that collaboration technologies are used effectively? 2. What factors need to be considered in the change management for sustainable activation? 3. What is the ideal design of learning formats for an end-user activation?
To answer these research questions in a well-founded and valid way, the method of expert interviews was chosen after an extensive literature search. Therefore, 3 experts from this field were interviewed on the topic and the collected qualitative data critically analyzed on the knowledge basis of the literature. Also, this thesis is written in collaboration with the company Ernst & Young GmbH WirtschaftsprĂŒfungsgesellschaft, which provided information on the topic and experience of experts.
The results can be used for organizations to decide on relevance and the way and strategy of implementing a new collaboration technology. They showed, that an implementation can be very complex and that many aspects should be considered for the employees to be able to work effectively with the new technology. Most important is an user centric approach with the needs and expectations of the affected employees at its core, which should be individually developed after a careful analysis of each organization. The skills and attitude toward a new way of collaborating, the mentality in communicating and sharing culture of exchanging work and results should be applied by the employees in order to work effectively. Therefore, a targeted end-user activation is highly recommended during and after the implementation of the new technology
Integrated water resources management as an engine of ecology-oriented urban and rural development
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