1,236 research outputs found
Review Essay: Miran Bozovic. \u3ci\u3eAn Utterly Dark Spot: Gaze and Body in Early Modern Philosophy\u3c/i\u3e
No full textMiran Bozovic. An Utterly Dark Spot: Gaze and Body in Early Modern Philosophy. Ann Arbor: University of Michigan Press, 2000
Count rates and structure factors in anomalous soft x-ray scattering from cuprate superconductors
No full textIt has recently been shown that x-ray diffraction from the doped holes in cuprates can be enhanced by 3-4 orders of magnitude by exploiting resonance effects in the oxygen K shell. This new type of anomalous scattering is direct way of probing ground state inhomogeneity in the mobile carrier liquid of high temperature superconductors. Here we describe a model which quantifies the relationship between experimental count rates and the structure factor for doped holes in this technique. We describe first efforts to detect inhomogeneity in thin films of La2CuO4+delta and report some peculiar observations. We attempt to offer some explanation.</p
Crystal and electronic structures of superconducting YSr2Cu3O6+x
No full textIn order to unveil the mechanism responsible for the large decrease of T-c (DeltaT(c) approximate to -30 K) found in YSr2Cu3O6+x with respect to YBa2Cu3O6+x, we compare structural and electronic properties of these two cuprates. We report X-ray, neutron diffraction, resistivity and ac susceptibility data and results of ab initio electronic structure calculations carried out within the local density approximation. Main structural differences between the two phases are: I) the absence of long CuO chains in YSr2Cu3O6+x possibly due to a large orthorhombic distortion predicted by calculations; 2) the strong compression of the CuO5 pyramids along the z-direction, which reduces the metallic character of the bond between the chain copper and the apical oxygen. This is expected to hinder the hole transfer from the CuO chains to the superconducting CuO2 planes, thus reducing the effective doping of the planes with respect to the optimum doping level. Both the disorder associated with short CuO chains and the reduced hole transfer would qualitatively account for the observed reduction of T-c
Count rates and structure factors in anomalous soft x-ray scattering from cuprate superconductors
No full textIt has recently been shown that x-ray diffraction from the doped holes in cuprates can be enhanced by 3-4 orders of magnitude by exploiting resonance effects in the oxygen K shell. This new type of anomalous scattering is direct way of probing ground state inhomogeneity in the mobile carrier liquid of high temperature superconductors. Here we describe a model which quantifies the relationship between experimental count rates and the structure factor for doped holes in this technique. We describe first efforts to detect inhomogeneity in thin films of La2CuO4+delta and report some peculiar observations. We attempt to offer some explanation.</p
Tuning of the Fermi Level at the shape resonance in a superlattice of quantum wires a mechanism for high Tc
No full textEd. I. Bozovic, D. van der Marel Proc. SPIE 2696, (1996
Luminal B breast cancer: molecular characterization, clinical management, and future perspectives.
No full textGene expression profiling has reshaped our understanding of breast cancer by defining and characterizing four main intrinsic molecular subtypes: human epidermal growth factor receptor 2-enriched, basal-like, luminal A, and luminal B subtypes. Luminal B breast cancer has been reported to have lower expression of hormone receptors, higher expression of proliferation markers, and higher histologic grade than luminal A. It also exhibits worse prognosis and has a distinct profile of response to hormone therapy and chemotherapy. Although luminal cancers share similarities, the studies conducted in recent years using next-generation sequencing technology show that luminal A and B breast cancers should be perceived as distinct entities, with specific oncogenic drivers, rather than more proliferative varieties of luminal tumors. This review discusses the definition and molecular characterization of luminal B breast cancer and presents the available clinical evidence for chemotherapy and endocrine therapy patterns of response. It also provides an overview of ongoing research on molecularly targeted agents for this disease.SCOPUS: re.jSCOPUS: re.jinfo:eu-repo/semantics/publishe
Anisotropic enhancement of flux pinning in Y-Ba-Cu-O thin films grown by the step-flow growth mode.
No full textMedical Robotics, chapter Prototypic force feedback instrument for minimally invasive robotic surgery.
No full text- …
