Pattern densities in fluid dimer models

In this paper, we introduce a family of observables for the dimer model on a bi-periodic bipartite planar graph, called pattern density fields. We study the scaling limit of these objects for liquid and gaseous Gibbs measures of the dimer model, and prove that they converge to a linear combination of a derivative of the Gaussian massless free field and an independent white noise.Comment: 38 pages, 3 figure

Burglary project

This report outlines the process and findings from an innovative project for students. This work was part of the curriculum and involved students working with West Yorkshire Police as part of the safer Leeds project in designing and making a film for students n crime prevention and personal safety in Leed

Plasma harmonics Lissajous measurements

June 17-21 200

Reframed teacher leadership: A narrative inquiry

Teacher leadership has been in schools from the time teachers rang the school bells. Three waves of teacher leadership have been examined. The first wave focused on formal managerial positions such as department chairs, the second wave focused on curriculum and staff development, and the third wave focused on daily acts of collaboration to solve problems and provide professional development activities for staffs. This study explored the third wave practice of teacher leaders in a qualitative study focusing on the narratives of 11 teacher leaders. A narrative of lives format was used to study leadership experiences. A pilot study was conducted with three teacher leaders in two school districts. The teachers in the research study were purposely selected from a pool of graduates from a master\u27s degree program focusing on teacher leadership. The teacher leaders shared their stories and their present philosophy and acts of teacher leadership in semi-structured interviews. The study explored the relationship of teachers\u27 personal and professional experiences on their construct of teacher leadership. A number of factors influenced leadership development including childhood experiences, serendipity and happenstance experiences, and mentors who encouraged teachers to get involved in leadership. Families influenced leadership activity and timing. Characteristics of meaningful site-based professional development and university-school professional development programs were examined. Principals either promoted or discouraged teacher leadership. The study describes implications for teachers, principals, and professional development programs and activities

Dusty Cometary Globules in W5

We report the discovery of four dusty cometary tails around low mass stars in two young clusters belonging to the W5 star forming region. Fits to the observed emission profiles from 24 micron observations with the Spitzer Space Telescope give tail lifetimes < 30 Myr, but more likely < 5 Myr. This result suggests that the cometary phase is a short lived phenomenon, occurring after photoevaporation by a nearby O star has removed gas from the outer disk of a young low mass star (see also Balog et al. 2006; Balog et al. 2008).Comment: 11 pages, 3 figures. Accepted for publication to ApJ Letter

Habituation to novel visual vestibular environments with special reference to space flight

The etiology of space motion sickness and the underlying physiological mechanisms associated with spatial orientation in a space environment were investigated. Human psychophysical experiments were used as the basis for the research concerning the interaction of visual and vestibular cues in the development of motion sickness. Particular emphasis is placed on the conflict theory in terms of explaining these interactions. Research on the plasticity of the vestibulo-ocular reflex is discussed

A comparison of coaching behaviors of physical educators and non-physical educators

This investigation compared the behaviors of secondary school coaches trained to teach physical education and coaches trained to teach in other academic disciplines during team practice sessions. [This is an excerpt from the abstract. For the complete abstract, please see the document.

ECONOMIC AND ENVIRONMENTAL IMPACTS OF NUTRIENT LOSS REDUCTIONS ON DAIRY AND DAIRY/POULTRY FARMS

Livestock Production/Industries,

New Brown Dwarfs and an Updated Initial Mass Function in Taurus

I have performed a search for young low-mass stars and brown dwarfs (BDs) in 2 regions encompassing a total area of 4 deg^2 in the Taurus star-forming region, discovering 15 new members of Taurus. In addition, I present 7 new members outside of these areas from the initial stage of a survey of all of Taurus. These 22 objects exhibit spectral types of M4.5-M9.25 and masses of 0.3-0.015 M_sun according to the theoretical evolutionary models of Baraffe and Chabrier, 7 of which are likely to be BDs. Emission in H(alpha), He I, Ca II, [O I], and [S II] and excess emission in optical and near-IR bands among some of these objects suggest the presence of accretion, outflows, and circumstellar disks. The results from the 4 deg^2 survey have been combined with previous studies of Taurus to arrive at an IMF for a total area of 12.4 deg^2. As in the previous IMFs for Taurus, the updated IMF peaks at a higher mass (0.8 M_sun) than the mass functions in IC 348 and Orion (0.1-0.2 M_sun). Meanwhile, the deficit of BDs in Taurus appears to be less significant (x1.4-1.8) than found in earlier studies (x2) because of a slightly higher BD fraction in the new IMF for Taurus and a lower BD fraction in the new spectroscopic IMF for the Trapezium from Slesnick and coworkers. The spatial distribution of the low-mass stars and BDs discovered in the two new survey areas closely matches that of the more massive members. Thus, on the degree size scales (~3 pc) probed to date, there is no indication that BDs form through ejection.Comment: 35 pages, The Astrophysical Journal, 2004, v617 (December 20