@inproceedings{44112, abstract = {{Homogeneous and inhomogeneous broadening of heavy- and light-hole excitons in semiconductor quantum wells are measured along with the excitation dependence of both broadenings. Isolation of disorder-induced broadening is possible with spectra in different coherent pathways.}}, author = {{Meier, Torsten and Zhang, Tianhao and Bristow, Alan D. and Dai, Xingcan and Kuznetsova, Irina and Thomas, P. and Cundiff, S.T.}}, booktitle = {{Quantum Electronics and Laser Science Conference}}, isbn = {{978-1-55752-859-9}}, location = {{San Jose, California United States}}, publisher = {{Optical Society of America}}, title = {{{Direct determination of exciton homogeneous and inhomogeneous linewidths in semiconductor quantum wells with two-dimensional fourier transform spectroscopy}}}, year = {{2008}}, } @inproceedings{44110, author = {{Meier, Torsten and Duc, Huynh Thanh and Koch, S.W. and Pasenow, B.}}, booktitle = {{72nd annual meeting and DPG spring meeting of the Condensed Matter Section and the Divisions}}, location = {{Berlin, Germany}}, title = {{{Intensity dependence of charge and spin currents generated by ultrafast two-color photoexcitation of semiconductor quantum wells}}}, volume = {{43}}, year = {{2008}}, } @inproceedings{44111, author = {{Meier, Torsten and Koch, S.W. and Pasenow, B.}}, booktitle = {{72nd annual meeting and DPG spring meeting of the Condensed Matter Section and the Divisions}}, location = {{Berlin, Germany}}, title = {{{Influence of heavy-hole light-hole band mixing on the strength of optically generated spin-currents in III-V semiconductor quantum wells}}}, volume = {{42}}, year = {{2008}}, } @article{23483, abstract = {{The emitted radiation from semiconductor nanostructures due to the excitation with intense ultrashort optical laser pulses is analyzed. Semiconductor Bloch equations that consistently describe the coupled light-field-induced interband and intraband dynamics are solved numerically. It is demonstrated that the intraband dynamics considerably influences the light emission in the regime of extreme nonlinear optics. In particular, the intraband acceleration significantly modifies the dynamics of the interband polarization which results in a strong enhancement of high-harmonic generation.}}, author = {{Golde, D. and Meier, Torsten and Koch, S. W.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{7}}, title = {{{High harmonics generated in semiconductor nanostructures by the coupled dynamics of optical inter- and intraband excitations}}}, doi = {{10.1103/physrevb.77.075330}}, volume = {{77}}, year = {{2008}}, } @inbook{44109, author = {{Meier, Torsten and Pasenow, B. and Reichelt, Matthias and Stroucken, T.}}, booktitle = {{Nanophotonic Materials: Photonic Crystals, Plasmonics, and Metamaterials}}, editor = {{Busch, Kurt and Kitzerow, H.-S. and Wehrspohn, Ralf B.}}, isbn = {{9783527408580 }}, pages = {{15--38}}, publisher = {{Wiley‐VCH Verlag GmbH & Co. KGaA}}, title = {{{Microscopic Analysis of the Optical and Electronic Properties of Semiconductor Photonic-Crystal Structures}}}, doi = {{10.1002/9783527621880.ch2}}, year = {{2008}}, } @inproceedings{44184, author = {{Müller, Inez}}, booktitle = {{Zwischen Globalisierungen und Regionalisierungen}}, editor = {{Platen, Edgar and Hellström, Martin}}, isbn = {{978-3-89129-858-9}}, location = {{Universität Göteborg}}, pages = {{17}}, publisher = {{iudicium Verlag}}, title = {{{Peter Stamms Erzählen von Identität in Räumen des Dazwischen}}}, volume = {{5}}, year = {{2008}}, } @article{41688, author = {{Fuchs, Christian}}, journal = {{triplec (Cognition, Communication, Co- operation)}}, number = {{2}}, title = {{{Editor of a special issue on "ICTs and Society: PhD Students' Transdisciplinary Research Projects" (Proceedings of the PhD conference “ICTs and Society“, June 20-21, 2008, University of Salzburg)}}}, volume = {{6}}, year = {{2008}}, } @article{41687, author = {{Fuchs, Christian}}, journal = {{tripleC (Cognition, Communication, Co-operation)}}, number = {{2}}, pages = {{ i--viii}}, title = {{{Introduction to the special issue on "ICTs and Society: PhD Students’ Transdisciplinary Research Projects"}}}, doi = {{https://doi.org/10.31269/triplec.v6i2.80}}, volume = {{6}}, year = {{2008}}, } @article{41692, author = {{Fuchs, Christian}}, journal = {{Constructivist Foundations. (Comment on the article “Who Conceives of Society?“ by Ernst von Glasersfeld that was published in the same issue)}}, number = {{2}}, pages = {{97--99}}, title = {{{Sociology, Dynamic Critical Realism, and Radical Constructivism}}}, volume = {{3}}, year = {{2008}}, } @article{41689, author = {{Fuchs, Christian and Sandoval, Marisol}}, journal = {{Journal for Critical Education Policy Studies}}, number = {{2}}, pages = {{112--141}}, title = {{{Positivism, Postmodernism, or Critical Theory? A Case Study of Communications Students’ Understandings of Criticism}}}, volume = {{6}}, year = {{2008}}, } @article{41690, author = {{Fuchs, Christian}}, journal = {{Environment, Development and Sustainability}}, number = {{3}}, pages = {{291--309}}, title = {{{The Implications of New Information and Communication Technologies for Sustainability}}}, volume = {{10}}, year = {{2008}}, } @article{41691, author = {{Fuchs, Christian and Horak, Eva}}, journal = {{Telematics and Informatics}}, number = {{2}}, pages = {{99--116}}, title = {{{Africa and the Digital Divide}}}, volume = {{25}}, year = {{2008}}, } @inbook{42418, author = {{Bichler, Robert and Fuchs, Christian and Raffl, Celina}}, booktitle = {{Framing Evil}}, editor = {{Billias, Nancy and Curry, Agnes B.}}, isbn = {{978-1-904710-76-9}}, pages = {{153--162}}, publisher = {{UK: Inter-Disciplinary Press}}, title = {{{Perspectives of Cyberethics in the Information Society}}}, year = {{2008}}, } @inbook{42420, author = {{Raffl, Celina and Hofkirchner, Wolfgang and Fuchs, Christian and Schafranek, Matthias}}, booktitle = {{Cybernetics and Systems 2008}}, editor = {{Trappl, Robert}}, pages = {{604--609}}, publisher = {{Austrian Society for Cybernetic Studies}}, title = {{{The Web as Techno-Social System. The Emergence of Web 3.0}}}, year = {{2008}}, } @inbook{42419, author = {{Fuchs, Christian}}, booktitle = {{Perspectives on Work}}, editor = {{Neumaier, Otto and Schweiger, Gottfried and Sedmak, Clemens}}, pages = {{235--248}}, publisher = {{LIT}}, title = {{{Foundations and Two Models of Guaranteed Basic Income}}}, year = {{2008}}, } @misc{42617, author = {{Fuchs, Christian}}, booktitle = {{Politics and Culture}}, number = {{4}}, title = {{{Review of “Wikinomics“ (Don Tapscott & Anthony D. Williams)}}}, volume = {{2}}, year = {{2008}}, } @techreport{42730, author = {{Fuchs, Christian}}, issn = {{1990-8563}}, publisher = {{ICT&S Center}}, title = {{{Deconstructive Class Analysis: Theoretical Foundations and Empirical Examples for the Analysis of Richness and the Class Analysis of the Media and the Culture Industry. ICT&S Research Paper No. 4}}}, year = {{2008}}, } @article{25980, abstract = {{Mesoporous SBA-15 (space group p6mm), KIT-6 (Ia3d) and KIT-5 (Fm3m) silicas, exhibiting different 2-D and 3-D channel- or cage-like pore structure and pore dimensions have been used as supports for iron oxide nanoparticles. The iron modification of the silica was performed according to a frequently used impregnation technique from aqueous iron nitrate solution. The materials were characterized by nitrogen physisorption, X-ray diffraction, TEM–EDX, Moessbauer spectroscopy, and temperature-programmed reduction (TPR) and tested in the catalytic decomposition of methanol. It is established that the location and dispersion of iron oxide nanoparticles are affected by the pore topology of the support. The most homogeneously dispersed iron oxide nanoparticles are observed using silica host matrix exhibiting a 3-D channel-like structure and pore diameters about 7 nm, and the thus-obtained composites exhibit high catalytic activity and selectivity in methanol decomposition to CO and hydrogen. For all the samples, characterized with a low mesopore volume and small pore diameters/pore entrances, the formation of larger iron oxide particles, mainly located on the outer surface, is observed. Inhomogeneously dispersed iron oxide particles with a large fraction of isolated, strongly interacting with the support, iron species, and possessing low catalytic activity and usually high selectivity to methane, are found for the silicas with relatively larger pores/pore entrances.}}, author = {{Tsoncheva, Tanya and Rosenholm, Jessica and Linden, Mika and Kleitz, Freddy and Tiemann, Michael and Ivanova, Ljubomira and Dimitrov, Momtchil and Paneva, Daniela and Mitov, Ivan and Minchev, Christo}}, issn = {{1387-1811}}, journal = {{Microporous and Mesoporous Materials}}, pages = {{327--337}}, title = {{{Critical evaluation of the state of iron oxide nanoparticles on different mesoporous silicas prepared by an impregnation method}}}, doi = {{10.1016/j.micromeso.2007.10.005}}, year = {{2008}}, } @article{25979, abstract = {{Various measures to optimise the impregnation of mesoporous CMK-3 carbon and SBA-15 silica matrices with metal nitrates for the synthesis of mesoporous metal oxides by structure replication are investigated. The effect of surface modification of the matrix pores, the choice of a solvent with suitable polarity, and the concentration of the metal nitrate solution are studied in detail. The efficiency of pore loading is monitored by nitrogen physisorption measurements. The creation of polar functions at the pore surface of CMK-3 carbon is shown to increase the impregnation efficiency substantially while maximizing the pore wall polarity of SBA-15 silica by increasing the amount of free silanol groups does not have any significant impact. The choice of a less polar solvent (THF instead of water) has a positive effect on the wettability of CMK-3 carbon in the first impregnation cycle but turns out to be disadvantageous in the second cycle; a similar trend is observed for variation of the metal salt concentration.}}, author = {{Roggenbuck, Jan and Waitz, Thomas and Tiemann, Michael}}, issn = {{1387-1811}}, journal = {{Microporous and Mesoporous Materials}}, pages = {{575--582}}, title = {{{Synthesis of mesoporous metal oxides by structure replication: Strategies of impregnating porous matrices with metal salts}}}, doi = {{10.1016/j.micromeso.2007.12.018}}, year = {{2008}}, } @article{25982, abstract = {{Iron (III) containing nanoparticles with superparamagnetic behaviour are prepared via deposition on various mesoporous supports (MgO, CeO2 and SBA-15). XRD, TEM-EDX, N2 physisorption, FTIR, and Moessbauer spectroscopy are used for their characterization. The reductive properties and catalytic behaviour in methanol decomposition of the materials are also studied. Depending on the chemical nature of the support, the predominant formation of: isolated iron species, strongly interacting with the support (for SBA-15), mixture of hematite and binary MgFe2O4 nanoparticles (for MgO) or almost homogeneously dispersed hematite particles (for CeO2) are observed. The state of iron species strongly affects their catalytic properties. The favorable effect of the support mesoporosity on the catalytic activity is most pronounced for the iron modified CeO2.}}, author = {{Tsoncheva, Tanya and Roggenbuck, Jan and Tiemann, Michael and Ivanova, Lyubomira and Paneva, Daniela and Mitov, Ivan and Minchev, Christo}}, issn = {{1387-1811}}, journal = {{Microporous and Mesoporous Materials}}, pages = {{339--346}}, title = {{{Iron oxide nanoparticles supported on mesoporous MgO and CeO2: A comparative physicochemical and catalytic study}}}, doi = {{10.1016/j.micromeso.2007.06.021}}, year = {{2008}}, }