Universality and Clustering in 1+1 Dimensional Superstring-Bit Models

We construct a 1+1 dimensional superstring-bit model for D=3 Type IIB superstring. This low dimension model escapes the problems encountered in higher dimension models: (1) It possesses full Galilean supersymmetry; (2) For noninteracting polymers of bits, the exactly soluble linear superpotential describing bit interactions is in a large universality class of superpotentials which includes ones bounded at spatial infinity; (3) The latter are used to construct a superstring-bit model with the clustering properties needed to define an $S$-matrix for closed polymers of superstring-bits.Comment: 11 pages, Latex documen

Defining the Force between Separated Sources on a Light Front

The Newtonian character of gauge theories on a light front requires that the longitudinal momentum P^+, which plays the role of Newtonian mass, be conserved. This requirement conflicts with the standard definition of the force between two sources in terms of the minimal energy of quantum gauge fields in the presence of a quark and anti-quark pinned to points separated by a distance R. We propose that, on a light front, the force be defined by minimizing the energy of gauge fields in the presence of a quark and an anti-quark pinned to lines (1-branes) oriented in the longitudinal direction singled out by the light front and separated by a transverse distance R. Such sources will have a limited 1+1 dimensional dynamics. We study this proposal for weak coupling gauge theories by showing how it leads to the Coulomb force law. For QCD we also show how asymptotic freedom emerges by evaluating the S-matrix through one loop for the scattering of a particle in the N_c representation of color SU(N_c) on a 1-brane by a particle in the \bar N_c representation of color on a parallel 1-brane separated from the first by a distance R<<1/Lambda_{QCD}. Potential applications to the problem of confinement on a light front are discussed.Comment: LaTeX, 15 pages, 12 figures; minor typos corrected; numerical correction in equation 3.

Spontaneous Symmetry Breaking at Infinite Momentum without P+ Zero-Modes

The nonrelativistic interpretation of quantum field theory achieved by quantization in an infinite momentum frame is spoiled by the inclusion of a mode of the field carrying p+=0. We therefore explore the viability of doing without such a mode in the context of spontaneous symmetry breaking (SSB), where its presence would seem to be most needed. We show that the physics of SSB in scalar quantum field theory in 1+1 space-time dimensions is accurately described without a zero-mode.Comment: LaTeX, 8 pages, 3 eps figure

Urinary C-peptide Creatinine Ratio in pregnant women with normal glucose tolerance and type 1 diabetes: evidence for insulin secretion

Hypothesis In pregnancy, urinary C peptide creatinine ratio (UCPCR) reflects endogenous insulin secretion in women with normal glucose tolerance and type 1 diabetes. Research design and methods UCPCR and serum C peptide were measured in 90 glucose-tolerant women at 0 and 120 min during a 75 g oral glucose tolerance test (OGTT) at 28 weeks of gestation. UCPCR was measured in 2 samples obtained over 10 weeks apart in 7 pregnant women with longstanding type 1 diabetes. Results UCPCROGTT and serum C peptideOGTT of glucose-tolerant women were significantly correlated at 0 and 120 min (rs0.675, 0.541 respectively, p<0.0001). All 7 pregnant women with type 1 diabetes had detectable first sample UCPCR (median (range) 49 (6–1038) pmol/mmol) that rose in 6 women by 477 (29–1491) pmol/mmol. Conclusions Detectable UCPCR in pregnant women with normal glucose tolerance and type 1 diabetes is likely to reflect endogenous insulin secretion and hence β-cell activity

Gluon Chain Model of the Confining Force

We develop a picture of the QCD string as a chain of constituent gluons, bound by attractive nearest-neighbor forces which may be treated perturbatively. This picture accounts for both Casimir scaling at large N, and the asymptotic center dependence of the static quark potential. We discuss the relevance, to the gluon-chain picture, of recent three-loop results for the static quark potential. A variational framework is presented for computing the minimal energy and wavefunction of a long gluon chain, which enables us to derive both the logarithmic broadening of the QCD flux tube (``roughening''), and the existence of a Luscher -c/R term in the potential.Comment: 25 pages, 5 figures, latex2

Pasture manipulation on the Esperance sandplain, C W Thorn, 1982 1983

Introduction. Methods. Results

Disappearance and Return: Psychoanalytic Perspectives on the Past

This is a theoretical dissertation about the psychology of returning to the past. The purpose of this work is to examine the growth potential of psychological returns and to clarify and contribute to psychoanalytic theory. Special attention is given to involuntary memories, or integrative returns, which are illustrated by four vignettes taken from a mixture of sources. These experiences provide a contrast to familiar pathological returns, such as the return of the repressed and the repetition compulsion. Accordingly, generative returns are differentiated from non-generative returns. With this distinction in mind, psychoanalytic theories are reappraised. A variety of psychoanalytic concepts and practices are reinterpreted as instances of generative returns, including (but not limited to) Freud’s early cathartic method, transference repetition, regression in the service of the ego, and regression to dependence. Other psychoanalytic concepts, particularly those stemming from the theories of Klein and Bion, are applied to the psychology of returning in general. The literature converges on some basic themes that cohere in each of the two classifications of returns, generative and non-generative. The following themes are prevalent in generative returns: expanded range of experience; rediscovery and resumed development; open interaction between different levels of organization; disorganization and reorganization; recognition; continuity; sense of individual truth; and reflective distance. By contrast, non-generative returns tend to eclipse meaning and have a non-elaborative character; these are experiences of discontinuity and fragmentation; they have a quality of “itness,” and occur outside the borders of self-feeling, or the “I.” Based on the complementary study of both experience and theory, it is possible to identify a typical sequence in generative returns. This sequence or progression constitutes a basic model of generative returns. Throughout this study, many generative returns follow a general progression from an initial phase of receptivity, to one of reimmersion and reexperiencing, to a concluding phase of self-reflection and reconfiguration. This mode of returning in the psychological sphere is representative of a basic principle of psychological growth. The electronic version of this dissertation is freely accessible through the OhioLINK ETD center (http://www.ohiolink.edu/etd/)

Pasture Manipulation - Grass control the year prior to cropping

Pasture manipulation - grass control the year prior to cropping. Aim 1. To measure the effects of various grass control treatments on pasture production and composition in the spraying year. 2. To measure the effects of grass control on wheat. Trial – 80MO41, 80MO40, 80AB2