Electroweak Symmetry Breaking by Condensates of Fermions in High Color Representations

In this thesis we investigate fundamental features of a mechanism that attempts to explain the origin of the electroweak scale by the condensation of fermions in high color representations. Since chiral symmetry in the new fermion sector is dynamically broken due to non-perturbative effects of the running strong coupling this mechanism provides a natural explanation for the scale of the condensate by dimensional transmutation. Electroweak symmetry breaking (EWSB) could then be triggered indirectly via a singlet scalar mediator which couples to the Standard Model Higgs boson and the new fermion sector. In our analysis particular focus is put to the impact of the representation on the condensate and the significance of vector-like fermion masses which explicitly break chiral symmetry. In doing so, we solve the Dyson-Schwinger equation for the fermion propagator within the rainbow-approximation and analyze the behavior of the dynamical mass. In the chiral limit, we find a comparatively larger expectation value (EV) of the condensate for fermions in high representations than for the fundamental representation. A property reflecting the larger Casimir invariants of higher representations. For massive fermions, we propose a method to isolate the non-perturbative contributions to the propagator from the perturbative ones and calculate a lower bound for the EV of the condensate. Our result suggests that in absolute numbers the EV of the condensate increases with mass, while its relative contribution to the dynamical mass diminishes. On the basis of these results, we believe the condensation of a high color fermion with an explicit mass of the order ~10TeV could successfully create the scale of EWSB

Utilization of ERTS-1 for appraising changes in continental migratory bird habitat

The author has identified the following significant results. Information on numbers, distribution, and quality of wetlands in the breeding range of migratory waterfowl is important for the management of this wildlife resource. Using computer processing of data gathered by the ERTS-1 multispectral scanner, techniques for obtaining indices of annual waterfowl recruitment, and habitat quality are examined. As a primary task, thematic maps and statistics relating to open surface water were produced. Discrimination of water was based upon water's low apparent radiance in a single, near-infrared waveband. An advanced technique using multispectral information for discerning open water at a level of detail finer than the virtual resolution of the data was also successfully tested. In another related task, vegetation indicators were used for detecting conditions of latent or occluded water and upland habitat characteristics

Preliminary evaluation of ERTS-1 for determining numbers and distribution of prairie ponds and lakes

ERTS-1 and aircraft multispectral data collected over a North Dakota test site during July 1972, are compared to evaluate the capability of the satellite sensors to detect numbers and distribution of prairie ponds and lakes. Recognition maps using ERTS-1, MSS 7 data are generated using a level slicing technique. Surface water areas larger than two acres are recognized, but ponds in the one-to two-acre range are detected only at random. The proportion estimation technique will improve the accuracy of area determination and small pond detection

Solvent and recovery process for lignin

Methods for obtaining purified lignin and the lignin that can be obtained by the methods are described. Methods include processing pretreated lignocellulosic biomass feedstock to recover the lignin and provide a lignin composition with a very low level of impurities such as metals and ash. In addition, the lignin recovered from the process can have a narrow molecular weight distribution and, depending upon the specific stages utilized in the process, can have a predetermined molecular weight. The process includes one or more separation stages in which a lignin-containing feedstock is mixed with a solvent solution. The mixture fractionates to form a solvent-rich liquid phase and a lignin-rich liquid phase, the lignin being partitioned across the phases according to the molecular weight of the lignin. Furthermore, the metal salts of the pretreated lignocellulosic biomass feedstock also partition across the phases

Development of Atmospheric Monitoring System at Akeno Observatory for the Telescope Array Project

We have developed an atmospheric monitoring system for the Telescope Array experiment at Akeno Observatory. It consists of a Nd:YAG laser with an alt-azimuth shooting system and a small light receiver. This system is installed inside an air conditioned weather-proof dome. All parts, including the dome, laser, shooter, receiver, and optical devices are fully controlled by a personal computer utilizing the Linux operating system. It is now operated as a back-scattering LIDAR System. For the Telescope Array experiment, to estimate energy reliably and to obtain the correct shower development profile, the light transmittance in the atmosphere needs to be calibrated with high accuracy. Based on observational results using this monitoring system, we consider this LIDAR to be a very powerful technique for Telescope Array experiments. The details of this system and its atmospheric monitoring technique will be discussed.Comment: 24 pages, 13 figures(plus 3 gif files), Published in NIM-A Vol.488, August 200

NA

http://www.archive.org/details/investigationofe00kletU.S. Navy (U.S.N.) author

Beings in their own right? Exploring Children and young people's sibling and twin relationships in the Minority World

This paper examines the contributions that the sociological study of sibship and twinship in the Minority World can make to childhood studies. It argues that, in providing one forum within which to explore children and young people's social relationships, we can add to our understanding of children and young people's interdependence and develop a more nuanced understanding of agency. As emergent subjects, children, young people and adults are in a process of ‘becoming’. However, this does not mean that they can ‘become’ anything they choose to. The notion of negotiated interdependence (Punch 2002) is useful in helping us to grasp the contingent nature of children and young people's agency