Directional States of Symmetric-Top Molecules Produced by Combined Static and Radiative Electric Fields

We show that combined electrostatic and radiative fields can greatly amplify the directional properties, such as axis orientation and alignment, of symmetric top molecules. In our computational study, we consider all four symmetry combinations of the prolate and oblate inertia and polarizability tensors, as well as the collinear and perpendicular (or tilted) geometries of the two fields. In, respectively, the collinear or perpendicular fields, the oblate or prolate polarizability interaction due to the radiative field forces the permanent dipole into alignment with the static field. Two mechanisms are found to be responsible for the amplification of the molecules' orientation, which ensues once the static field is turned on: (a) permanent-dipole coupling of the opposite-parity tunneling doublets created by the oblate polarizability interaction in collinear static and radiative fields; (b) hybridization of the opposite parity states via the polarizability interaction and their coupling by the permanent dipole interaction to the collinear or perpendicular static field. In perpendicular fields, the oblate polarizability interaction, along with the loss of cylindrical symmetry, is found to preclude the wrong-way orientation, causing all states to become high-field seeking with respect to the static field. The adiabatic labels of the states in the tilted fields depend on the adiabatic path taken through the parameter space comprised of the permanent and induced-dipole interaction parameters and the tilt angle between the two field vectors

Investigation into Travel Modes for Transit Oriented Development: Employees' Travel Survey of Kelvin Grove Urban Village

Travel surveys were conducted for collecting data related to visitors travel to Kelvin Grove Urban Village (KGUV). KGUV has employees of retail shopping centre, employees of educational land use, school and university students and shoppers as visitors of this area. As a part of data collection process a travel surveys was undertaken for employees and students of KGUV. This document contains the questionnaire form used to collect the data related to employee travel. Similar questions were asked to the students of KGUV. The instructions given for filling out the survey were not included in the actual questionnaire form as internet based surveys were undertaken. This form was used for personal interviews and Computer Assisted Personal Interview (CAPI) surveys undertaken for employees of the retail shopping centre

Improved Spin Dynamics Simulations of Magnetic Excitations

Using Suzuki-Trotter decompositions of exponential operators we describe new algorithms for the numerical integration of the equations of motion for classical spin systems. These techniques conserve spin length exactly and, in special cases, also conserve the energy and maintain time reversibility. We investigate integration schemes of up to eighth order and show that these new algorithms can be used with much larger time steps than a well established predictor-corrector method. These methods may lead to a substantial speedup of spin dynamics simulations, however, the choice of which order method to use is not always straightforward.Comment: J. Mod. Phys. C (in press

New Star Forming Galaxies at z\approx 7 from WFC3 Imaging

The addition of Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) has led to a dramatic increase in our ability to study the z>6 Universe. The increase in the near-infrared (NIR) sensitivity of WFC3 over previous instruments has enabled us to reach apparent magnitudes approaching 29 (AB). This allows us to probe the rest-frame ultraviolet (UV) continuum, redshifted into the NIR at $z>6$. Taking advantage of the large optical depths at this redshift, resulting in the Lyman-alpha break, we use a combination of WFC3 imaging and pre-existing Advanced Camera for Surveys (ACS) imaging to search for z approx 7 over 4 fields. Our analysis reveals 29 new z approx 7 star forming galaxy candidates in addition to 16 pre-existing candidates already discovered in these fields. The improved statistics from our doubling of the robust sample of z-drop candidates confirms the previously observed evolution of the bright end of the luminosity function.Comment: 15 pages, accepted in MNRA

An Exploratory Study of Resilience Among American Indian Human Service Professionals

This study explores the link between Native American cultural factors and the concept of resilience. The research design utilized personal interviews with 12 Native Americans in positions of leadership within their own community, to explore questions about protective factors, risk factors and cultural factors. The bicultural continuum was used to study participants to self assess their degree of assimilation. Findings did reflect some similarity between protective factors identified in the resilience literature and cultural factors. Discussion of findings addresses how increased knowledge of the Native American culture can assist practitioners in the assessment of resilience when working with Native American families

Conceptions of learning identified by indigenous students entering a University preparation course

The increase in Indigenous participation in university courses in recent years has not been matched by an increase in graduation. In the mainstream university population, student success has been linked to approaches to learning, which are linked to conceptions of learning. This study investigates what conceptions of learning Indigenous students identify at the beginning of their university career. Thirty six students completed a \u27Reflections on Learning Inventory\u27 developed by Meyer (1995). Nine of these students were interviewed in depth about what they thought learning was and how they would go about it. The interview analysis for each of the nine students was compared with their individual inventory profile. It was anticipated that the use of such complementary methods would increase the validity of the findings, but this was not the case. The participants identified a range of conceptions comparable with those identified by mainstream students, but with a greater emphasis on understanding. However, the descriptions of how learning happens were undeveloped and not likely to result in the kind of learning described. The findings will be useful in making curricula decisions in an Indigenous university preparation course that encourage students to adopt successful strategies for learning. In addition, it will also be useful information for the participants themselves as they become reflective learners

Fast spin dynamics algorithms for classical spin systems

We have proposed new algorithms for the numerical integration of the equations of motion for classical spin systems. In close analogy to symplectic integrators for Hamiltonian equations of motion used in Molecular Dynamics these algorithms are based on the Suzuki-Trotter decomposition of exponential operators and unlike more commonly used algorithms exactly conserve spin length and, in special cases, energy. Using higher order decompositions we investigate integration schemes of up to fourth order and compare them to a well established fourth order predictor-corrector method. We demonstrate that these methods can be used with much larger time steps than the predictor-corrector method and thus may lead to a substantial speedup of computer simulations of the dynamical behavior of magnetic materials.Comment: 9 pages RevTeX with 8 figure

The Las Campanas Infra-red Survey. V. Keck Spectroscopy of a large sample of Extremely Red Objects

(Abridged) We present deep Keck spectroscopy, using the DEIMOS and LRIS spectrographs, of a large and representative sample of 67 ``Extremely Red Objects'' (EROs) to H=20.5, with I-H>3.0, in three of the Las Campanas Infrared Survey fields. Spectroscopic redshifts are determined for 44 sources, of which only two are contaminating low mass stars. When allowance is made for incompleteness, the spectroscopic redshift distribution closely matches that predicted earlier on the basis of photometric data. Our spectra are of sufficient quality that we can address the important question of the nature and homogeneity of the z>0.8 ERO population. A dominant old stellar population is inferred for 75% of our spectroscopic sample; a higher fraction than that seen in smaller, less-complete samples with broader photometric selection criteria (e.g. R-K). However, only 28% have spectra with no evidence of recent star formation activity, such as would be expected for a strictly passively-evolving population. More than ~30% of our absorption line spectra are of the `E+A' type with prominent Balmer absorption consistent, on average, with mass growth of 5-15% in the past Gyr. We use our spectroscopic redshifts to improve earlier estimates of the spatial clustering of this population as well as to understand the significant field-to-field variation. Our spectroscopy enables us to pinpoint a filamentary structure at z=1.22 in the Chandra Deep Field South. Overall, our study suggests that the bulk of the ERO population is an established population of clustered massive galaxies undergoing intermittent activity consistent with continued growth over the redshift interval 0.8<z<1.6.Comment: 27 pages, including 14 figures and appendix of spectra (at low resolution). Full resolution paper can be found at http://www.ast.cam.ac.uk/~md . To appear in MNRA