55 research outputs found
The Role of Entrepreneurship and Spirituality in the Provision of Elective Social Enterprise Courses in Business Schools
The final chapter in this section, chapter ten, Cherry Cheung, Sujun Fieldhouse and
Caleb Kwong examine the extent to which the spirituality of a university may impact its decision to offer social enterprise courses as part of their business curriculum. Universities face increasing pressures from stakeholders to produce moral, civically aware and socially responsible citizens who will create positive change in their societies. Because of their concern and focus on social, economic, environmental and now spiritual ‘bottom-lines’, social enterprises courses are seen as one way of engaging in the conversations to examine transformational shifts in society. Using data from 494 business schools accredited by AACSB in the US, Cheung, Fieldhouse and Kwong found that, alongside structural differences, universities with higher entrepreneurship orientation, as well as the presence of spirituality markers, such as sustainability, diversity and religious orientations, are more likely to be offering social enterprise courses for business students, after controlling for other factors. This is an important finding, confirming that spirituality has a role to play in supporting a broader education experience that has the potential to develop socially responsible citizens who have the awareness to create transformational social changes. Thus, the study alerts the wider academic community of the contributions that social enterprise courses can make in creating social change, particularly for those without a strong emphasis of spirituality that may struggle to see the need to offer such courses
Photoelectrochemical Properties of WO3 Thin Films Prepared by Electrodeposition
AbstractTungsten trioxide (WO3) thin films were synthesised by electrodeposition using peroxotungtic acid as the precursor electrolyte solution for use as photoanodes in a photoelectrochemical cell for solar hydrogen applications. The films were coated at deposition potentials varying from 0.30 to 0.90V versus Ag/AgCl in order to study the effect of the potential on the mineralogical, morphological, optical, and photoelectrochemical properties of the nanoparticulate films. The films were composed of monoclinic WO3, the degree of crystallinity and preferred orientation of the orthogonal planes of which increased with deposition potential and associated film thickness. In contract, increasing the deposition potential had a minimal impact on the particle sizes, which were in the range ∼80-90nm. While films deposited at the potential range of 0.30 to 0.60V showed controlled nanostructures with thicknesses in the range 168-431nm, increasing the deposition potential from 0.70 to 0.90V resulted in rapid increase in film, which led to cracking from drying stress. Linear voltammetry data suggested that the optimal potential for the deposition of stable films was in the range 0.37 to 0.60V. However, the data for the film deposited at a potential of 0.30V indicated a film of high quality. Further, the data for the film deposited at a potential of 0.60V indicated a film of a low quality and so this voltage represents a transition point for stable-unstable film growth and unstressed-stressed nanostructure from drying. The trends in the optical transmission properties showed that the photocatalytic activity of the films could be expected to decrease with increasing potential, thickness, and crystallinity. That is, the band gap and projected absorption edge exhibited a red shift. This was attributed to the relative effects of the surface and volume band gaps, in which the latter would increase relative to the former with increasing thickness. The photocurrent densities reflected the effects of increasing solid volume and decreasing band gap with increasing film thickness. The exception was the reduced performance of the film deposited at the potential of 0.60 V. This outcome was attributed to the competition between the photogeneration and recombination of electron-hole pairs, where the potential of 0.60V represents the transition point described above
Guided vortex motion in superconductors with a square antidot lattice
We have measured the in-plane anisotropy of the vortex mobility in a thin Pb
film with a square array of antidots. The Lorentz force, acting on the
vortices, was rotated by adding two perpendicular currents and keeping the
amplitude of the net current constant. One set of voltage probes was used to
detect the vortex motion. We show that the pinning landscape provided by the
square antidot lattice influences the vortex motion in two different ways.
First, the modulus of the vortex velocity becomes angular dependent with a
lower mobility along the diagonals of the pinning array. Second, the vortex
displacement is preferentially parallel to the principal axes of the underlying
pinning lattice, giving rise to a misalignment between the vortex velocity and
the applied Lorentz force. We show that this anisotropic vortex motion is
temperature dependent and progressively fades out when approaching the normal
state.Comment: 5 pages, 4 figure
Heavy quarkonium: progress, puzzles, and opportunities
A golden age for heavy quarkonium physics dawned a decade ago, initiated by
the confluence of exciting advances in quantum chromodynamics (QCD) and an
explosion of related experimental activity. The early years of this period were
chronicled in the Quarkonium Working Group (QWG) CERN Yellow Report (YR) in
2004, which presented a comprehensive review of the status of the field at that
time and provided specific recommendations for further progress. However, the
broad spectrum of subsequent breakthroughs, surprises, and continuing puzzles
could only be partially anticipated. Since the release of the YR, the BESII
program concluded only to give birth to BESIII; the -factories and CLEO-c
flourished; quarkonium production and polarization measurements at HERA and the
Tevatron matured; and heavy-ion collisions at RHIC have opened a window on the
deconfinement regime. All these experiments leave legacies of quality,
precision, and unsolved mysteries for quarkonium physics, and therefore beg for
continuing investigations. The plethora of newly-found quarkonium-like states
unleashed a flood of theoretical investigations into new forms of matter such
as quark-gluon hybrids, mesonic molecules, and tetraquarks. Measurements of the
spectroscopy, decays, production, and in-medium behavior of c\bar{c}, b\bar{b},
and b\bar{c} bound states have been shown to validate some theoretical
approaches to QCD and highlight lack of quantitative success for others. The
intriguing details of quarkonium suppression in heavy-ion collisions that have
emerged from RHIC have elevated the importance of separating hot- and
cold-nuclear-matter effects in quark-gluon plasma studies. This review
systematically addresses all these matters and concludes by prioritizing
directions for ongoing and future efforts.Comment: 182 pages, 112 figures. Editors: N. Brambilla, S. Eidelman, B. K.
Heltsley, R. Vogt. Section Coordinators: G. T. Bodwin, E. Eichten, A. D.
Frawley, A. B. Meyer, R. E. Mitchell, V. Papadimitriou, P. Petreczky, A. A.
Petrov, P. Robbe, A. Vair
Neutralization-guided design of HIV-1 envelope trimers with high affinity for the unmutated common ancestor of CH235 lineage CD4bs broadly neutralizing antibodies
The CD4 binding site (CD4bs) of the HIV-1 envelope glycoprotein is susceptible to multiple lineages of broadly neutralizing antibodies (bnAbs) that are attractive to elicit with vaccines. The CH235 lineage (VH1-46) of CD4bs bnAbs is particularly attractive because the most mature members neutralize 90% of circulating strains, do not possess long HCDR3 regions, and do not contain insertions and deletions that may be difficult to induce. We used virus neutralization to measure the interaction of CH235 unmutated common ancestor (CH235 UCA) with functional Env trimers on infectious virions to guide immunogen design for this bnAb lineage. Two Env mutations were identified, one in loop D (N279K) and another in V5 (G458Y), that acted synergistically to render autologous CH505 transmitted/founder virus susceptible to neutralization by CH235 UCA. Man5-enriched N-glycans provided additional synergy for neutralization. CH235 UCA bound with nanomolar affinity to corresponding soluble native-like Env trimers as candidate immunogens. A cryo-EM structure of CH235 UCA bound to Man5-enriched CH505.N279K.G458Y.SOSIP.664 revealed interactions of the antibody light chain complementarity determining region 3 (CDR L3) with the engineered Env loops D and V5. These results demonstrate that virus neutralization can directly inform vaccine design and suggest a germline targeting and reverse engineering strategy to initiate and mature the CH235 bnAb lineage
Measurement of \chi_{c2} Production in Two-Photon Collisions
The production of the \chi_{c2} charmonium state in two-photon collisions has
been measured with the Belle detector at the KEKB e^+e^- collider. A clear
signal for \chi_{c2} --> \gamma J/\psi, J/\psi --> l^+l^- is observed in a
32.6fb^{-1} data sample accumulated at center-of-mass energies near 10.6GeV,
and the product of its two-photon decay width and branching fraction is
determined to be \Gamma_{\gamma\gamma}(\chi_{c2})B(\chi_{c2} --> \gamma J/\psi)
B(J/\psi --> l^+l^-)= 13.5 +/- 1.3(stat.) +/- 1.1(syst.)eV.Comment: 16 pages, 5 figures, to be submitted to Phys. Lett.
Oncogenic Signaling Pathways in The Cancer Genome Atlas
Genetic alterations in signaling pathways that control cell-cycle progression, apoptosis, and cell growth are common hallmarks of cancer, but the extent, mechanisms, and co-occurrence of alterations in these pathways differ between individual tumors and tumor types. Using mutations, copy-number changes, mRNA expression, gene fusions and DNA methylation in 9,125 tumors profiled by The Cancer Genome Atlas (TCGA), we analyzed the mechanisms and patterns of somatic alterations in ten canonical pathways: cell cycle, Hippo, Myc, Notch, Nrf2, PI-3-Kinase/Akt, RTK-RAS, TGFb signaling, p53 and beta-catenin/Wnt. We charted the detailed landscape of pathway alterations in 33 cancer types, stratified into 64 subtypes, and identified patterns of co-occurrence and mutual exclusivity. Eighty-nine percent of tumors had at least one driver alteration in these one alteration potentially targetable by currently available drugs. Thirty percent of tumors had multiple targetable alterations, indicating opportunities for combination therapy
Robust multipartite thermal entanglement
10.1088/1751-8113/41/29/295301Journal of Physics A: Mathematical and Theoretical4129
Double-weight signature pattern codes for multicore-fiber code-division multiple-access networks
To transmit digitized image pixels in optical code-division multiple-access (CDMA) networks with multicore fiber, classes of two-dimensional (2-D) patterns, so-called optical orthogonal signature pattern codes (OOSPC's), have recently been proposed. The new technology enables parallel transmission and simultaneous access of multiple 2-D images in multiple-access environments, In this letter, we construct two new families of "double-weight" OOSPC's without the assumption of identical weight for all signature patterns in a code set. Since the performance of a signature pattern varies with its weight, these new double-weight OOSPC's are especially useful for optical CDMA networks with multiple performance requirements
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