A QCD-parton calculation of associated Higgs boson production in hadron-hadron collision

This thesis contains a study of the reaction proton+proton or proton-antiproton into a Higgs boson and a pair of heavy quarks, in the region of high energy and high momentum transfer. The Higgs boson mass is treated as a free parameter. Numerical results are obtained through a Monte Carlo integration. Several differential cross sections relevant to experiment are given.Science, Faculty ofPhysics and Astronomy, Department ofGraduat

Configuration et pondération optimales d'antenne par la méthode de recuite simulée

On décrit l'application de la méthode d'optimisation dite de "recuite simulée" au problème de trouver la meilleure configuration et pondération des capteurs pour le cas d'une antenne discrète. La question à laquelle on doit répondre est celle-ci: "Étant donné une longueur maximale d'antenne et le nombre de capteurs, quel est le placement des capteurs et leur pondération qui donnera la plus petite largeur de voie tout en gardant les lobes secondaires le plus près possible d'un niveau donné SL?" Nous mettons l'accent sur le fait que cette méthode est assez générale, et que d'autres critères d'optimisation pourraient aussi bien être employés. Quand la recherche est terminée, tous les lobes secondaires sont sous SL, et la longueur finale de l'antenne peut ne pas occuper toute la distance qui lui était allouée

The auditory motion aftereffect: Its tuning and specificity in the spatial and frequency domains

In this paper, the auditory motion aftereffect (aMAE) was studied, using real moving sound as both the adapting and the test stimulus. The sound was generated by a loudspeaker mounted on a robot arm that was able to move quietly in three-dimensional space. A total of 7 subjects with normal hearing were tested in three experiments. The results from Experiment 1 showed a robust and reliable negative aMAE in all the subjects. After listening to a sound source moving repeatedly to the right, a stationary sound source was perceived to move to the left. The magnitude of the aMAE tended to increase with adapting velocity up to the highest velocity tested (20/sec). The aftereffect was largest when the adapting and the test stimuli had similar spatial location and frequency content. Offsetting the locations of the adapting and the test stimuli by 20 reduced the size of the effect by about 50%. A similar decline occurred when the frequency of the adapting and the test stimuli differed by one octave. Our results suggest that the human auditory system possesses specialized mechanisms for detecting auditory motion in the spatial domain

Auditory Motion Aftereffect 1 Perception and Psychophysics. Vol. 62(5), pp. 1099–1111. Suggested running head: AUDITORY MOTION AFTEREFFECT The Auditory Motion Aftereffect: its Tuning and Specificity in the Spatial and Frequency Domains

In this paper, the auditory motion aftereffect (aMAE) was studied by using real moving sound as both the adapting and test stimulus. The real moving sound was generated by a loudspeaker mounted on a robot arm which was able to move quietly in three dimensional space. Seven subjects with normal hearing were tested. Results from Experiment 1 showed a robust and reliable negative aMAE in all the subjects involved. After listening to a sound source moving repeatedly to the right, a stationary sound source was perceived to be moving to the left. The magnitude of the aMAE tended to increase up to the highest velocity tested (<30°/sec). The tuning and specificity of this aftereffect was further studied in the spatial and frequency domains. The strength of the aftereffect depended on matching both the spatial location and the frequency content of the adapting and test stimuli. Offsetting the locations of adapting and test stimuli by 20° reduced the size of the effect by about 50%. A similar decline occurred when the frequency of the adapting and test stimuli differed by one octave

Meditation Experience Predicts Introspective Accuracy

<div><p>The accuracy of subjective reports, especially those involving introspection of one's own internal processes, remains unclear, and research has demonstrated large individual differences in introspective accuracy. It has been hypothesized that introspective accuracy may be heightened in persons who engage in meditation practices, due to the highly introspective nature of such practices. We undertook a preliminary exploration of this hypothesis, examining introspective accuracy in a cross-section of meditation practitioners (1–15,000 hrs experience). Introspective accuracy was assessed by comparing subjective reports of tactile sensitivity for each of 20 body regions during a ‘body-scanning’ meditation with averaged, objective measures of tactile sensitivity (mean size of body representation area in primary somatosensory cortex; two-point discrimination threshold) as reported in prior research. Expert meditators showed significantly better introspective accuracy than novices; overall meditation experience also significantly predicted individual introspective accuracy. These results suggest that long-term meditators provide more accurate introspective reports than novices.</p> </div

Introspective Accuracy compared between groups of Experts and Novices.

<p>Composite Somatic Sensitivity Rank for the 20 body regions assessed alongside averaged sensitivity scores for MED-Novice and MED-Expert meditators for each body region (on a 1–9 scale). Experts' mean subjective scores correlated strongly and significantly with SSR, whereas Novices' mean scores correlated negatively and nonsignificantly.</p

Line diagrams used in the Subjective Sensory Sensitivity questionnaire.

<p>Participants provided a rating (on a scale of 1–9; Fig. 1) of the relative, subjective sensitivity of each region during their meditation experience. The 20 regions were simply numbered from top to bottom and front to back of the body; this pattern of numbering bore no relation to the rankings of objective sensitivity measures with which subjective reports were compared. All body regions listed in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0045370#pone-0045370-t001" target="_blank">Table 1</a>.</p

Psychophysical and cortical measures of tactile sensitivity throughout the body.

<p>Reverse rank-ordered tactile sensitivity for each of the twenty body regions examined, according to psychophysical (2PD threshold) and cortical (area of S1, adjusted for corresponding skin surface area) measures, as reported in previous research. Psychophysical and cortical measures were strongly correlated [<i>r</i>(19) = .65, <i>p</i> = .002]. ^a[Ref. 23]; ^b[Ref. 24]; ^c[Ref. 25]; ^d[Ref. 26] (esp. Fig. 17, pg. 44). 2PD: two-point discrimination; S1: primary somatosensory cortex.</p

Subjective sensitivity scale used for self-reported sensitivity of 20 body regions after BSM session.

<p>Subjective sensitivity scale used for self-reported sensitivity of 20 body regions after BSM session.</p