Suppression of Quantum Scattering in Strongly Confined Systems

We demonstrate that scattering of particles strongly interacting in three dimensions (3D) can be suppressed at low energies in a quasi-one-dimensional (1D) confinement. The underlying mechanism is the interference of the s- and p-wave scattering contributions with large s- and p-wave 3D scattering lengths being a necessary prerequisite. This low-dimensional quantum scattering effect might be useful in "interacting" quasi-1D ultracold atomic gases, guided atom interferometry, and impurity scattering in strongly confined quantum wire-based electronic devices.Comment: 3 figs, Phys. Rev. Lett. (early November issue

Learning masculinities in a Japanese high school rugby club

This paper draws on research conducted on a Tokyo high school rugby club to explore diversity in the masculinities formed through membership in the club. Based on the premise that particular forms of masculinity are expressed and learnt through ways of playing (game style) and the attendant regimes of training, it examines the expression and learning of masculinities at three analytic levels. It identifies a hegemonic, culture-specific form of masculinity operating in Japanese high school rugby, a class-influenced variation of it at the institutional level of the school and, by further tightening its analytic focus, further variation at an individual level. In doing so this paper highlights the ways in which diversity in the masculinities constructed through contact sports can be obfuscated by a reductionist view of there being only one, universal hegemonic patterns of masculinity

Talking with the experts: Evaluation of an online discussion forum involving mental health service users in the education of mental health nursing students

The Chief Nursing Officer’s recent review of mental health nursing called for the widespread involvement of mental health service users in the education of mental health nurses. This paper describes an innovative project that involved mental health service users in the education of pre-registration mental health nursing students through an online discussion forum that blended e-learning with enquiry-based learning (EBL). The findings of an evaluation are presented, drawing on quantitative and qualitative methods. Overall, the project was a success with students and service users engaging in online discussions on a range of issues. EBL presentations demonstrated understanding of the service user experience and students reflected on implications for clinical practice. All participants would take part again and recommend the online forum to others. Analysis of activity data revealed different levels and styles of student involvement. Limitations in communication skills appeared to limit student participation, alongside logistical difficulties, whereas the service users eagerly utilised the forum. Potential implications for healthcare education are discussed and recommendations made for developments in user-led e-learning and further research

Current driven rotating kink mode in a plasma column with a non-line-tied free end

First experimental measurements are presented for the kink instability in a linear plasma column which is insulated from an axial boundary by finite sheath resistivity. Instability threshold below the classical Kruskal-Shafranov threshold, axially asymmetric mode structure and rotation are observed. These are accurately reproduced by a recent kink theory, which includes axial plasma flow and one end of the plasma column that is free to move due to a non-line-tied boundary condition.Comment: 4 pages, 6 figure

The breakdown of the municipality as caring platform: lessons for co-design and co-learning in the age of platform capitalism

If municipalities were the caring platforms of the 19-20th century sharing economy, how does care manifest in civic structures of the current period? We consider how platforms - from the local initiatives of communities transforming neighbourhoods, to the city, in the form of the local authority - are involved, trusted and/or relied on in the design of shared services and amenities for the public good. We use contrasting cases of interaction between local government and civil society organisations in Sweden and the UK to explore trends in public service provision. We look at how care can manifest between state and citizens and at the roles that co-design and co-learning play in developing contextually sensitive opportunities for caring platforms. In this way, we seek to learn from platforms in transition about the importance of co-learning in political and structural contexts and make recommendations for the co-design of (digital) platforms to care with and for civil society

[Pd4(μ3-SbMe3)4(SbMe3)4]: A Pd(0) tetrahedron with μ3-bridging trimethylantimony ligands

The palladium(II) chlorostibine complex [PdCl2(SbMe2Cl)2]2 has a dimeric structure in the solid state, stabilized by hyper-coordination at the Lewis amphoteric Sb centers. Reaction with 8 equiv of MeLi forms [Pd4(μ3-SbMe3)4(SbMe3)4], whose structure comprises a tetrahedral Pd(0) core with four terminal SbMe3 ligands and four μ3-SbMe3 ligands, one capping each triangular Pd3 face. Density functional theory calculations, supported by energy decomposition analysis and the natural orbitals for chemical valence scheme, highlight significant donor and acceptor orbital contributions to the bonding between both the terminal and the bridging SbMe3 ligands and the Pd4 core

Dissociative electron attachment to the H2O molecule. II. Nuclear dynamics on coupled electronic surfaces within the local complex potential model

We report the results of a first-principles study of dissociative electron attachment to H2O. The cross sections are obtained from nuclear dynamics calculations carried out in full dimensionality within the local complex potential model by using the multi-configuration time-dependent Hartree method. The calculations employ our previously obtained global, complex-valued, potential-energy surfaces for the three (doublet B1, doublet A1, and doublet B2) electronic Feshbach resonances involved in this process. These three metastable states of H2O- undergo several degeneracies, and we incorporate both the Renner-Teller coupling between the B1 and A1 states as well as the conical intersection between the A1 and B2 states into our treatment. The nuclear dynamics are inherently multidimensional and involve branching between different final product arrangements as well as extensive excitation of the diatomic fragment. Our results successfully mirror the qualitative features of the major fragment channels observed, but are less successful in reproducing the available results for some of the minor channels. We comment on the applicability of the local complex potential model to such a complicated resonant system.Comment: Corrected version of Phys Rev A 75, 012711 (2007

Pseudo-time Schroedinger equation with absorbing potential for quantum scattering calculations

The Schroedinger equation with an energy-dependent complex absorbing potential, associated with a scattering system, can be reduced for a special choice of the energy-dependence to a harmonic inversion problem of a discrete pseudo-time correlation function. An efficient formula for Green's function matrix elements is also derived. Since the exact propagation up to time 2t can be done with only t real matrix-vector products, this gives an unprecedently efficient scheme for accurate calculations of quantum spectra for possibly very large systems.Comment: 9 page

Field-induced water electrolysis switches an oxide semiconductor from an insulator to a metal

Here we demonstrate that water-infiltrated nanoporous glass electrically switches an oxide semiconductor from an insulator to metal. We fabricated the field effect transistor structure on an oxide semiconductor, SrTiO3, using 100%-water-infiltrated nanoporous glass - amorphous 12CaO*7Al2O3 - as the gate insulator. For positive gate voltage, electron accumulation, water electrolysis and electrochemical reduction occur successively on the SrTiO3 surface at room temperature, leading to the formation of a thin (~3 nm) metal layer with an extremely high electron concentration of 10^15-10^16 cm^-2, which exhibits exotic thermoelectric behaviour.Comment: 21 pages, 12 figure

I-Light Applications Workshop 2002 Proceedings

Editing for this document was provided by Gregory Moore and Craig A. Stewart.Indiana Governor Frank O'Bannon symbolically lit the fiber of the I-Light network on December 11, 2001. I-Light is a unique, high-speed fiber optic network connecting Indiana University Bloomington, Indiana University–Purdue University Indianapolis, and Purdue University West Lafayette with each other and with Abilene, the national high-speed Internet2 research and education network. This unique university-owned high speed network connects three of the Indiana's great research campuses. One year after the lighting of the network, we invited researchers from Indiana University and Purdue University to come together to discuss some of the research and instructional achievements that have been made possible in just one short year of the existence of I-Light. The results were dramatic: on December 4, 2002, more than 150 researchers gathered together in Indianapolis to discuss research and instructional breakthroughs made possible by I-Light.The I-Light Applications Workshop 2002 was sponsored by the Office of the Vice President for Information Technology and CIO, Indiana University; and the Office of the Vice President for Information Technology and CIO, Purdue University. I-Light was made possible by a special appropriation by the State of Indiana. The research described at the I-Light Applications Workshop has been supported by numerous grants from several sources, mentioned in the individual presentations included in this proceedings volume. Many of the scientific research projects discussed in this volume have been supported by the National Science Foundation and/or the National Institutes of Health. Some Purdue projects also received support from Indiana's 21st Century Fund. Multiple presentations featured work supported by the Lilly Endowment, Inc., through grants to Indiana University in support of the Pervasive Technology Laboratories and the Indiana Genomics Initiative, both at Indiana University. Purdue University projects received support from the National Science Foundation and the 21st Century Fund. Any opinions, findings and conclusions, or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the granting agencies