Frankie Welch Papers - Accession 519

The Frankie Welch Papers consists of correspondence, financial records, stock inventories, newspaper clippings, newsletters, monograms and fabrics, correspondence relating to commissioned artwork, designer scarf donations, and business associates of Frankie Welch’s business venture, Frankie Welch of America. The largest part of the collection consists of financial records dealing with the designing and manufacturing of the products made and sold by Frankie Welch of America. Frankie Welch, born Mary Frances Barnett (1923- ), was a fashion designer and a former Distinguished Visiting Professor of Merchandising and Design in the School of Consumer Science at Winthrop College from 1982 through 1985. She became well-known for designing scarves for many prominent political figures from 1960s to 1990s, a dress design known as “The Frankie,” and a dress worn by First Lady Betty Ford in her official portrait.https://digitalcommons.winthrop.edu/manuscriptcollection_findingaids/1600/thumbnail.jp

On the conservation of helicity in a chiral medium

We consider the energy and helicity densities of circularly polarised light within a lossless chiral medium, characterised by the chirality parameter β. A form for the helicity density is introduced, valid to first order in β, that produces a helicity of ±\hbar per photon for right and left circular polarisation, respectively. This is in contrast to the result obtained if we use the form of the helicity density employed for linear media. We examine the helicity continuity equation, and show that this modified form of the helicity density is required for consistency with the dual symmetry condition of a chiral medium with a constant value of ε/μ. Extending the results to arbitrary order in β establishes an exact relationship between the energy and helicity densities in a chiral medium

On the conservation of helicity in a chiral medium

We consider the energy and helicity densities of circularly polarised light within a lossless chiral medium, characterised by the chirality parameter β. A form for the helicity density is introduced, valid to first order in β, that produces a helicity of ±\hbar per photon for right and left circular polarisation, respectively. This is in contrast to the result obtained if we use the form of the helicity density employed for linear media. We examine the helicity continuity equation, and show that this modified form of the helicity density is required for consistency with the dual symmetry condition of a chiral medium with a constant value of ε/μ. Extending the results to arbitrary order in β establishes an exact relationship between the energy and helicity densities in a chiral medium

Optical helicity and chirality: conservation and sources

We consider the helicity and chirality of the free electromagnetic field, and advocate the former as a means of characterising the interaction of chiral light with matter. This is in view of the intuitive quantum form of the helicity density operator, and of the dual symmetry transformation generated by its conservation. We go on to review the form of the helicity density and its associated continuity equation in free space, in the presence of local currents and charges, and upon interaction with bulk media, leading to characterisation of both microscopic and macroscopic sources of helicity

Coherence and catalysis in the Jaynes-Cummings model

There has been substantial interest of late on the issue of coherence as a resource in quantum thermodynamics. To date, however, analyses have focussed on somewhat artificial theoretical models. We seek to bring these ideas closer to experimental investigation by examining the ``catalytic'' nature of quantum optical coherence. Here the interaction of a coherent state cavity field with a sequence of two-level atoms is considered, a state ubiquitous in quantum optics as a model of a stable, classical source of light. The Jaynes-Cummings interaction Hamiltonian is used, so that an exact solution for the dynamics can be formed, and the evolution of the atomic and cavity states with each atom-field interaction analysed. In this way, the degradation of the coherent state is examined as coherence is transferred to the sequence of atoms. The associated degradation of the coherence in the cavity mode is significant in the context of the use of coherence as a thermodynamic resource

Continuous Symmetries and Conservation Laws in Chiral Media

Locally conserved quantities of the electromagnetic field in lossless chiral media are derived from Noether's theorem, including helicity, chirality, momentum, and angular momentum, as well as the separate spin and orbital components of this last quantity. We discuss sources and sinks of each in the presence of current densities within the material, and in some cases, as also generated by inhomogeneity of the medium. A previously obtained result connecting sources of helicity and energy within chiral materials is explored, revealing that association between the two quantities is not restricted to chiral media alone. Rather, it is analogous to the connection between the momentum, and the spin and orbital components of the total angular momentum. The analysis reveals a new quantity, appearing as the "orbital" counterpart of the helicity density in classical electromagnetism

A comparison of the soiling behavior of dacron-and-cotton fabrics with those of similarly constructed all-cotton fabrics

The trend toward increased consumption of Dacron fibers has been influenced by the interest in the use of Dacron and cotton blends for apparel. The well known qualities of cotton blend with those of Dacron to form fabrics with consumer appeal in a variety of textures. There is also consumer appeal in those properties which contribute to the serviceability of the fabrics; particularly to those properties which contribute to their use in "wash and wear" apparel. Cotton is noted for its response to moisture. Physically it is highly hydroscopic. It absorbs and releases large quantities of water.1 Chemically speaking, except for impurities, cotton is pure cellulose. Cotton is a hydrophylic fiber because of the many exposed (OH) groups in it. Many of these groups swell as much as 1|0 per cent in volume upon immersion in water and practically all the increase occurs in the cross section of the cotton fiber. It is doubtful that solid soil greater than submicroscopic size can penetrate the interior deeply.

Consumer decision-making behavior in purchasing textiles for the home

The major purpose of this study was to investigate consumer decision-making behavior in the purchase of textiles for the home. Specifically, the study was planned to investigate the effect that social class has upon the consumer's use of external search for information as to: (1) the extent to which search is used, (2) the sources of information consulted, (3) the choice of product attributes for which information is sought, and (4) the relation between the sources of information consulted and the product attributes for which information is sought

Controlling the symmetry of inorganic ionic nanofilms with optical chirality

Manipulating symmetry environments of metal ions to control functional properties is a fundamental concept of chemistry. For example, lattice strain enables control of symmetry in solids through a change in the nuclear positions surrounding a metal centre. Light–matter interactions can also induce strain but providing dynamic symmetry control is restricted to specific materials under intense laser illumination. Here, we show how effective chemical symmetry can be tuned by creating a symmetry-breaking rotational bulk polarisation in the electronic charge distribution surrounding a metal centre, which we term a meta-crystal field. The effect arises from an interface-mediated transfer of optical spin from a chiral light beam to produce an electronic torque that replicates the effect of strain created by high pressures. Since the phenomenon does not rely on a physical rearrangement of nuclear positions, material constraints are lifted, thus providing a generic and fully reversible method of manipulating effective symmetry in solids