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Search Results: 1 - 10 of 120698 matches for " Stephanie T. Burns "
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Gender Differences in the Validity of Career Interest Inventories  [PDF]
Stephanie T. Burns
Psychology (PSYCH) , 2014, DOI: 10.4236/psych.2014.58089

Predictive validity (including hit rates, kappa coefficients, and chance expectancy rates) between standard scoring and person matching was compared by gender based upon ex post facto data collected on 5143 medical students who had taken a career interest inventory and entered their medical residency. Hit rate accuracy for person matching with females and males in this study was lower than standard scoring. However, person matching demonstrated greater gender balancing in first match hit rates. Additionally, person matching increased career interest inventory validity over standard scoring as it has the greater ability to a) differentiate between and b) assign to specific occupational groups for females and males. Furthermore, person matching has the potential to offer female and male test takers the ability to receive narrative career data, which could improve the career decision making process over the scoring reports of career interest inventories using standard scoring.

Do Auditory Temporal Discrimination Tasks Measure Temporal Resolution of the CNS?  [PDF]
Ian T. Zajac, Nicholas R. Burns
Psychology (PSYCH) , 2011, DOI: 10.4236/psych.2011.27114
Abstract: Rammsayer & Brandler (2002) have proposed that auditory temporal discrimination tasks provide a measure of temporal resolution of the CNS which is argued to be partly responsible for higher order cognitive functioning. We report on two studies designed to elicit the nature of the functions underpinning these auditory tasks. Study 1 assessed whether temporal generalisation (TG) might be better considered as a measure of working memory rather than of temporal resolution of the CNS. In N = 66 undergraduates TG did not predict speed of processing tasks; however, there was evidence of a relationship between TG and working memory. Study 2 reanalyzed pre- viously published data on temporal discrimination tasks and showed that the relationship between auditory tem- poral tasks and intelligence reflects memory functions and processing speed. Auditory temporal discrimination tasks are confounded by speed and memory and should not be considered as measures of temporal resolution of the CNS.
Wet Soil Redox Chemistry as Affected by Organic Matter and Nitrate  [PDF]
Duane T. Gardiner, Stephanie James
American Journal of Climate Change (AJCC) , 2012, DOI: 10.4236/ajcc.2012.14017

Wet soil microcosms were established to determine effects of organic matter and nitrate additions on microbial respiration and redox potentials. Organic matter (1%) and nitrate (100 ppm and 200 ppm) treatments were applied in factorial combination. Soil pH, redox potential, and CO2 emissions were measured. Data were analyzed by ANOVA for repeated measures and separately by sampling day. Addition of organic matter significantly (P < 0.05) and consistently increased CO2 emissions and decreased redox potentials. On Day 42 nitrate significantly (P < 0.05) increased redox values. This study indicates a tendency for organic matter to decrease soil redox potential both in absolute terms and relative to the suboxic-anoxic boundary. Our findings portend that additions of organic matter may quickly and markedly decrease soil redox potentials and increase CO2 emissions in wetlands, whereas additions of nitrate may have complex and sporadic effects on redox potentials.

Visible Proofs of Valour: The Trophy in South Italic Iconography of the Fourth Century BC
Michael T. Burns
Papers from the Institute of Archaeology , 2003, DOI: 10.5334/pia.203
Abstract: In the regions of southern Italy known to the Romans as Campania and Lucania, there are numerous tomb and vase paintings of warriors from the fourth century BC. A recurrent theme in these paintings is ‘the return of the warrior’, in which a warrior, who is often mounted, arrives home carrying a trophy of spoils stripped from defeated enemies over his shoulder. The image of the victorious warrior in these scenes has often been interpreted as an idealistic image created to flatter the martial pretences of the aristocracy and not a reality of warfare. This paper discusses the ideology behind the iconography of the trophy and attempts to understand the heroic ethos of the south Italic warrior. Using evidence from literary and archaeological sources, this study concludes that the heroic iconography was far from being just an ideal of the elite. Spoils taken from enemies were seen as visible proofs of a warrior’s prowess and valour in battle, and were a way in which even the most humble warrior could acquire prestige and honour in south Italic society.
Hyperfine splitting and the experimental candidates for η_b(2S)
T. J. Burns
Physics , 2012, DOI: 10.1103/PhysRevD.87.034022
Abstract: Predictions for the hyperfine splitting of 2S bottomonia are compared with the two recent experimental candidates for the \eta_b(2S). The smaller splitting of the Belle state is consistent with unquenched lattice QCD computations, many potential models, and a model-independent relation which works well for charmonia. The larger splitting for the state extracted from CLEO data is inconsistent with most predictions.
Phenomenology of $P_c(4380)^+$, $P_c(4450)^+$ and related states
T. J. Burns
Physics , 2015, DOI: 10.1140/epja/i2015-15152-6
Abstract: The $P_c(4380)^+$ and $P_c(4450)^+$ states recently discovered at LHCb have masses close to several relevant thresholds, which suggests they can be described in terms of meson-baryon degrees of freedom. This article explores the phenomenology of these states, and their possible partners, from this point of view. Competing models can be distinguished by the masses of the neutral partners which have yet to be observed, and the existence or otherwise of further partners with different isospin, spin, and parity. Future experimental studies in different decay channels can also discriminate among models, using selection rules and algebraic relations among decays. Among the several possible meson-baryon pairs which could be important, one implies that the states are mixtures of isospins 1/2 and 3/2, with characteristic signatures in production and decay. A previous experimental study of a Cabibbo-suppressed decay showed no evidence for the states, and further analysis is required to establish the significance of this non-observation. Several intriguing similarities suggest that $P_c(4450)^+$ is related to the $X(3872)$ meson.
Do Purpose-Designed Auditory Tasks Measure General Speediness?  [PDF]
Ian T. Zajac, Nicholas R. Burns, Ted Nettelbeck
International Journal of Intelligence Science (IJIS) , 2012, DOI: 10.4236/ijis.2012.22004
Abstract: This study was concerned with the measurement of General Speediness (Gs) using the auditory modality. Existing as well as purpose-developed auditory tasks that maintained the cognitive requirements of established visually presented Gs marker tests were completed by N = 80 university undergraduates. Analyses supported the results of our previous work [1] and auditory and visual tasks combined to define latent RT and Gs factors. Moreover, the analysis did not support the presence of modality-specific speed factors. Overall, this study provides further evidence suggesting that auditory tasks might successfully measure existing broad abilities defined in intelligence theories (i.e., Gf, Gc, etc.) provided they maintain the same cognitive requirements as existing visual measures of such constructs.
Hybrid meson properties in Lattice QCD and Flux Tube Models
T. Burns,F. E. Close
Physics , 2006, DOI: 10.1103/PhysRevD.74.034003
Abstract: Flux tube model predictions for hybrid meson decays are beginning to be confronted by Lattice QCD. We compare the two approaches for the $S$-wave decay of the exotic $1^{-+}$, and find excellent agreement. Results suggest that in Strong QCD, \qq~ creation occurs with S=1.
Hadron production in $\psi$, $\eta_c$ and $\chi$ decays
Burns, T. J.;Close, F. E.
High Energy Physics - Phenomenology , 2007,
Abstract: We derive relations among branching fractions in the exclusive decay of charmonia to light flavour meson pairs assuming factorization between the quark spin and spatial degrees of freedom. With the further assumption that these amplitudes can be described by flux-tube models, we assess prospects for production of hybrid mesons in charmonium decays.
Using kinematic boundary lines for particle mass measurements and disambiguation in SUSY-like events with missing energy
Michael Burns,Konstantin T. Matchev,Myeonghun Park
Physics , 2009, DOI: 10.1088/1126-6708/2009/05/094
Abstract: We revisit the method of kinematical endpoints for particle mass determination, applied to the popular SUSY decay chain squark -> neutralino -> slepton -> LSP. We analyze the uniqueness of the solutions for the mass spectrum in terms of the measured endpoints in the observable invariant mass distributions. We provide simple analytical inversion formulas for the masses in terms of the measured endpoints. We show that in a sizable portion of the SUSY mass parameter space the solutions always suffer from a two-fold ambiguity, due to the fact that the original relations between the masses and the endpoints are piecewise-defined functions. The ambiguity persists even in the ideal case of a perfect detector and infinite statistics. We delineate the corresponding dangerous regions of parameter space and identify the sets of "twin" mass spectra. In order to resolve the ambiguity, we propose a generalization of the endpoint method, from single-variable distributions to two-variable distributions. In particular, we study analytically the boundaries of the (m_{jl(lo)}, m_{jl(hi)}) and (m_{ll}, m_{jll}) distributions and prove that their shapes are in principle sufficient to resolve the ambiguity in the mass determination. We identify several additional independent measurements which can be obtained from the boundary lines of these bivariate distributions. The purely kinematical nature of our method makes it generally applicable to any model that exhibits a SUSY-like cascade decay.
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