A Web-based Information Space for University Education

This paper describes a research framework focusing on conceptual, marketing-oriented aspects of Web-based Mass Information Systems (WMIS) analysis and design with a special emphasis on the integration of adaptive system components for supporting negotiations, market segmentation, targeted direct marketing initiatives, and transaction processing. Methods to gather and analyze customer preferences and expectations as well as to visualize the actual behavior of WMIS users are identified in order to maximize the customer delivered value in global electronic markets

Engagement of Students Teaching Assistants-Confessions From 5 Years of Conference Participation

This paper reports from five years of experience of engaging young student teaching assistants in the continuous development of a course by involving them in research, both pedagogically and in other course related themes. The purpose of the paper is to pave the road for a more engaged and integrated form of teaching, where the full potential of STAs is released. Firstly some basic constructs are presented; secondly a concrete example of STAs’ research activity is presented - as an illustrative case - which also forms the empirical background of the paper. Finally implications and reflections are identified accompanied with suggestions for further research

The Emperor's New Clothes? Problems of the User Survey as a Planning Tool in Academic Libraries

published or submitted for publicatio

Structural fluctuations and aging processes in deeply frozen proteins

Frozen proteins are nonergodic systems and are subject to two types of structural motions, namely relaxation and fluctuation. Relaxation manifests itself in aging processes which slow the fluctuations. Within certain approximations we are able to experimentally separate the aging dynamics from the fluctuation dynamics by introducing two time parameters, namely an aging time ta and a waiting time tw. Both processes follow power laws in time. The fluctuation dynamics shows features of universality characterized by a rather uniform exponent of 1/4. This universality features were shown to be possible due to a random walk on a 1D random trajectory in conformational phase space. A very interesting aspect of protein dynamics concerns the influence of the host solvent on structural motions of the protein cores. We present results for sugar solvents and discuss possible mechanisms

Magnetic string contribution to hadron dynamics in QCD

Dynamics of a light quark in the field of static source (heavy-light meson) is studied using the nonlinear Dirac equation, derived recently. Special attention is paid to the contribution of magnetic correlators and it is found that it yields a significant increase of string tension at intermediate distances. The spectrum of heavy-light mesons is computed with account of this contribution and compared to experimental and lattice data.Comment: 10 pages Revte

Decoherence times of universal two-qubit gates in the presence of broad-band noise

The controlled generation of entangled states of two quantum bits is a fundamental step toward the implementation of a quantum information processor. In nano-devices this operation is counteracted by the solid-state environment, characterized by a broadband and non-monotonic power spectrum, often 1/f at low frequencies. For single-qubit gates, incoherent processes due to fluctuations acting on different time scales result in peculiar short- and long-time behavior. Markovian noise gives rise to exponential decay with relaxation and decoherence times, T1 and T2, simply related to the symmetry of the qubit-environment coupling Hamiltonian. Noise with the 1/f power spectrum at low frequencies is instead responsible for defocusing processes and algebraic short-time behavior. In this paper, we identify the relevant decoherence times of an entangling operation due to the different decoherence channels originating from solid-state noise. Entanglement is quantified by concurrence, which we evaluate in an analytic form employing a multi-stage approach. The 'optimal' operating conditions of reduced sensitivity to noise sources are identified. We apply this analysis to a superconducting \sqrt{i-SWAP} gate for experimental noise spectra.Comment: 35 pages, 11 figure