46 research outputs found
Effects of serum and serum heat-inactivation on human bone derived osteoblast progenitor cells
Generally, heat inactivated foetal calf serum (FCS) containing media are used for the cultivation of animal and human cells. The role of serum source and serum treatment on the behaviour of cells has long been neglected. The present study was performed to investigate the effects of serum heat inactivation and serum source on trabecular bone derived progenitor cells (HBC). Furthermore, it was investigated in how far these reactions differed from those seen in bone marrow derived mesenchymal progenitor cells (HBMC) cultures. We found that HBC cultures performed differently in the presence of FCS and HS with or without heat inactivation. The reactions similar to some degree those observed in HBMC cultures. The implications of the results on cell-implant surface interaction studies are discusse
The barocaloric effect: A Spin-off of the Discovery of High-Temperature Superconductivity
Some key results obtained in joint research projects with Alex M\"uller are
summarized, concentrating on the invention of the barocaloric effect and its
application for cooling as well as on important findings in the field of
high-temperature superconductivity resulting from neutron scattering
experiments.Comment: 26 pages, 9 figure
Measuring multipartite entanglement via dynamic susceptibilities
Entanglement plays a central role in our understanding of quantum many body
physics, and is fundamental in characterising quantum phases and quantum phase
transitions. Developing protocols to detect and quantify entanglement of
many-particle quantum states is thus a key challenge for present experiments.
Here, we show that the quantum Fisher information, representing a witness for
genuinely multipartite entanglement, becomes measurable for thermal ensembles
via the dynamic susceptibility, i.e., with resources readily available in
present cold atomic gas and condensed-matter experiments. This moreover
establishes a fundamental connection between multipartite entanglement and
many-body correlations contained in response functions, with profound
implications close to quantum phase transitions. There, the quantum Fisher
information becomes universal, allowing us to identify strongly entangled phase
transitions with a divergent multipartiteness of entanglement. We illustrate
our framework using paradigmatic quantum Ising models, and point out potential
signatures in optical-lattice experiments.Comment: 5+5 pages, 3+2 figure
Dose to organs at risk in the upper abdomen in patients treated with extended fields by helical tomotherapy: a dosimetric and clinical preliminary study
Système simple d’aide à la pose d’aiguilles de biopsie
Dans le cadre de la chirurgie assistée par ordinateur, le groupe VRAI, en collaboration avec l’entreprise Atracsys, est en train de développer le vTrack, un système de mesure optique 3D. Ce système repère, par triangulation, la position de marqueurs positionnés sur les outils chirurgicaux et le patient. Les marqueurs sont composés de LEDs infrarouges et communiquent par un canal sans fils avec la caméra. Le but de ce projet est, dans un premier temps, de réaliser un logiciel pour la planification de biopsie sur la base d’images scanner et ultrason. Dans un second temps, les marqueurs existants seront adaptés aux outils du radiologue. Finalement, un prototype utilisable dans un milieu hospitalier sera réalisé