The Schr\"odinger Functional for Improved Gluon and Quark Actions

The Schr\"odinger Functional (quantum/lattice field theory with Dirichlet boundary conditions) is a powerful tool in the non-perturbative improvement and for the study of other aspects of lattice QCD. Here we adapt it to improved gluon and quark actions, on isotropic as well as anisotropic lattices. Specifically, we describe the structure of the boundary layers, obtain the exact form of the classically improved gauge action, and outline the modifications necessary on the quantum level. The projector structure of Wilson-type quark actions determines which field components can be specified at the boundaries. We derive the form of O(a) improved quark actions and describe how the coefficients can be tuned non-perturbatively. There is one coefficient to be tuned for an isotropic lattice, three in the anisotropic case. Our ultimate aim is the construction of actions that allow accurate simulations of all aspects of QCD on coarse lattices.Comment: 39 pages, LaTeX, 11 embedded eps file

Pitch and yaw motions of a human being in free fall

Human limb motions for body orientation during free fal

Alteration of the state of motion of a human being in free fall

Orientation and attitude alteration of human body motion state in free fall studied with mathematical model

Using a Fermionic Ensemble of Systems to Determine Excited States

We discuss a new numerical method for the determination of excited states of a quantum system using a generalization of the Feynman-Kac formula. The method relies on introducing an ensemble of non-interacting identical systems with a fermionic statistics imposed on the systems as a whole, and on determining the ground state of this fermionic ensemble by taking the large time limit of the Euclidean kernel. Due to the exclusion principle, the ground state of an $n$-system ensemble is realized by the set of individual systems occupying successively the $n$ lowest states, all of which can therefore be sampled in this way. To demonstrate how the method works, we consider a one-dimensional oscillator and a chain of harmonically coupled particles.Comment: 14 pages, Latex + 4 eps figure

TOWARD AN UNDERSTANDING OF ACADEMIC AND NONACADEMIC TASKS PROCRASTINATED BY STUDENTS: THE USE OF DAILY LOGS

For five consecutive days, at either the beginning or the end of a term, college students (30 women, 7 men) listed daily academic and nonacademic tasks they intended to complete and whether they actually completed them. Students reported nonacademic tasks (e.g., household chores, making telephone calls, exercising, and playing sports) as completed most often regardless of the time within the term. Results from 2 (early vs. later sessions) by 2 (completed vs. not completed tasks) by 2 (academic vs. nonacademic tasks) ANOVAs found that procrastinated tasks early in the term were more effortful and anxiety provoking than any other task during the term. Procrastinated academic tasks (e.g., homework, reading assignments, studying) in the early part of a term were rated as unpleasurable, while students reported later in the term that pleasantness of the task did not affect whether it was procrastinated or completed. These results imply that academic and nonacademic tasks should be challenging, yet fun, to heighten the likelihood that they are completed by students

A non-perturbative determination of Z_V and b_V for O(a) improved quenched and unquenched Wilson fermions

By considering the local vector current between nucleon states and imposing charge conservation we determine, for $O(a)$ improved Wilson fermions, its renormalisation constant and quark mass improvement coefficient. The computation is performed for both quenched and two flavour unquenched fermions.Comment: 3 pages, 4 figures, Lattice(2002)(improve

Affect and the perception of injustice

Traditional approaches to distributive justice have seen the determination of whether or not a distribution of rewards is fair as a cognitive process, with emotion entering the process only as an outcome of a decision that the distribution was unjust. In this paper, we propose a modification of this view. Namely, we propose that justice is not calculated unless the actor feels a justice-related emotion (anger or guilt). These emotions, which arise in the course of social interaction, lead to the instigation of justice deliberations. Using Affect Control Theory, we explain how the justice-related emotions could arise in situations that traditional models of justice would characterise as unjust. Thus, our theory is able to account for the existing literature on justice. We then show how our theory suggests several novel implications about situations that would be seen as unjust. Comparisons of our model to related models of justice are also discussed