Searches for New Physics at the Tevatron

This paper summarizes searches at the Fermilab Tevatron for a wide variety of signatures for physics beyond the Standard Model. These include searches for supersymmetric particles, in the two collider detectors and in one fixed target experiment. Also covered are searches for leptoquarks, dijet resonances, heavy gauge bosons, and particles from a fourth generation, as well as searches for deviations from the Standard Model predictions in dijet angular distributions, dilepton mass distributions, and trilinear gauge boson couplings.Comment: 16 pages, 12 figures, Latex. Talk given at the Meeting of the Division of Particles and Fields (DPF96), Minneapolis, August 10-15, 1996 (to be published in the proceedings

Railroads in Tuolumne County, California : their role and importance to specific industries and their impact on county economic development, 1897-1917

During most of the nineteenth century and the early years of the twentieth numerous railroads were built throughout America. Some. grew into gigantic systems with names we recognize today; Southern Pacific, Atchison, Topeka & Santa Fe, Chesapeake & Ohio. Others faded into oblivion. But all, successful or not, were built to fill transportation needs. In Tuolumne County, California, located along the Mother. Lode and stretching into the high Sierra Nevada, the first railroad reached the county in 1897. By World War I a number of rail lines had been built. Several, having served their purpose, had already been removed by that time. They played varying roles in the different industries of the county; mining and minerals, lumber, hydroelectric power and agriculture, as well as passenger service. After the war many things changed. Automobiles and trucks successfully competed for some traffic. Mining suffered as labor costs increased while gold held at a price fixed by the government. Dams built by public agencies dwarfed the earlier projects of private industry. And, outside capitalists acquired control of companies that had formerly been locally owned and managed. The transportation picture changed dramatically from what: it had been before the war. The purpose of this paper is to study those early years of the twentieth century in Tuolumne County. What were the needs for railroads in different: industries and enterprises in the county between 1897 and 1917; and what was their importance to those industries? And finally what was the impact of railroads on the economic development of Tuolumne County as a whole? By focusing on an area with a relatively self-contained railroad network it is hoped that influences in the economy will be more apparent. Trends identified here should find application in other areas. It is also hoped that topics for future research will be suggested and that methods and resources for that research will be suggested

How accessible and acceptable are current GP referral mechanisms for IAPT for low-income patients? Lay and primary care perspectives

Background: Improving Access to Psychological Therapies (IAPT) constitutes a key element of England’s national mental health strategy. Accessing IAPT usually requires patients to self-refer on the advice of their GP. Little is known about how GPs perceive and communicate IAPT services with patients from low-income communities, nor how the notion of self-referral is understood and responded to by such patients. Aims: This paper examines how IAPT referrals are made by GPs and how these referrals are perceived and acted on by patients from low-income backgrounds Method: Findings are drawn from in-depth interviews with low-income patients experiencing mental distress (n = 80); interviews with GPs (n = 10); secondary analysis of video-recorded GP-patient consultations for mental health (n = 26). Results: GPs generally supported self-referral, perceiving it an important initial step towards patient recovery. Most patients however, perceived self-referral as an obstacle to accessing IAPT, and felt their mental health needs were being undermined. The way that IAPT was discussed and the pathway for referral appears to affect uptake of these services. Conclusions: A number of factors deter low-income patients from self-referring for IAPT. Understanding these issues is necessary in enabling the development of more effective referral and support mechanisms within primary care

Interference in Bohmian Mechanics with Complex Action

In recent years, intensive effort has gone into developing numerical tools for exact quantum mechanical calculations that are based on Bohmian mechanics. As part of this effort we have recently developed as alternative formulation of Bohmian mechanics in which the quantum action, S, is taken to be complex [JCP {125}, 231103 (2006)]. In the alternative formulation there is a significant reduction in the magnitude of the quantum force as compared with the conventional Bohmian formulation, at the price of propagating complex trajectories. In this paper we show that Bohmian mechanics with complex action is able to overcome the main computational limitation of conventional Bohmian methods -- the propagation of wavefunctions once nodes set in. In the vicinity of nodes, the quantum force in conventional Bohmian formulations exhibits rapid oscillations that pose severe difficulties for existing numerical schemes. We show that within complex Bohmian mechanics, multiple complex initial conditions can lead to the same real final position, allowing for the description of nodes as a sum of the contribution from two or more crossing trajectories. The idea is illustrated on the reflection amplitude from a one-dimensional Eckart barrier. We believe that trajectory crossing, although in contradiction to the conventional Bohmian trajectory interpretation, provides an important new tool for dealing with the nodal problem in Bohmian methods

Researching with communities: towards a leading edge theory and practice for community engagement

This project seeks to determine the extent to which complexity theory might offer the most effective means for understanding how communities can be successfully engaged in and with academic research. In the project, we adopted a case study approach, working with participants in a number of projects which had significant community engagement. These projects were all supported by the UK Beacons for Public Engagement, with which we also collaborated in our work. From the outset our research was informed by a Community Advisory Group, comprising community partners and engagement specialists. The objective of our research was to identify the initial conditions that facilitated the creation of enabling environments for community engagement. A number of the research results challenged our theoretical assumptions. Revisiting these results, we were led to develop a new way of conceptualising community engagement, which we propose to call an „engagement cycle‟. We suggest that this engagement cycle comprises a number of differential „phases‟, each of which is constituted by its own characteristic processes. This notion of an engagement cycle raises further research questions relating to the applicability of complexity theory to community engagement, as well as suggesting a number of issues that may inform the future development of the Connected Communities community engagement strategy