Crystal structures and freezing of dipolar fluids

We investigate the crystal structure of classical systems of spherical particles with an embedded point dipole at T=0. The ferroelectric ground state energy is calculated using generalizations of the Ewald summation technique. Due to the reduced symmetry compared to the nonpolar case the crystals are never strictly cubic. For the Stockmayer (i.e., Lennard-Jones plus dipolar) interaction three phases are found upon increasing the dipole moment: hexagonal, body-centered orthorhombic, and body-centered tetragonal. An even richer phase diagram arises for dipolar soft spheres with a purely repulsive inverse power law potential $\sim r^{-n}$. A crossover between qualitatively different sequences of phases occurs near the exponent $n=12$. The results are applicable to electro- and magnetorheological fluids. In addition to the exact ground state analysis we study freezing of the Stockmayer fluid by density-functional theory.Comment: submitted to Phys. Rev.

Letter from Camp Spring Mill Co. to L. De Bona regarding shipment of flour.

Office of Camp Spring Mill Co. - Manufacturers of Gradual Reduction Flour Model Roller Mills - J. B. Woestman (President), H. H. Cordes (Treasurer)Leonard de Bona was a businessman, possibly of Italian descent, in Eagle Pass, Texas, who ran a hardware and supply store in that area for nearly 20 years. He served as a point of contact for customers throughout South Texas and nearby Mexico, providing not only hardware but food, clothing, and sundries. He had business contacts in San Antonio, Chicago, and abroad (Central Mexico, Italy, and other locations.)Archive of Correspondence relating to L. de Bona's Eagle Pass Hardware and Supply Store from 1887-1903 and undated. Approximately 500 letters, varying states of condition, some browning. An important archive for a businessman on the border in Eagle Pass, Texas with nearly 500 letters, most from neighboring Texas communities, order supplies.Organized by the following series: Correspondence and ChronologicalBona, L. de, Papers, 1887-1903 and undated, Southwest Collection/Special Collections Library, Texas Tech University, Lubbock, Texa

The information needs and labelling preferences of food allergic consumers: the views of stakeholders regarding information scenarios

The information provision to foodallergicconsumers might be improved if new information and communication technologies were used to optimise traceability of potentially allergenic ingredients. Eight different informationscenarios were developed, and their feasibility of application in European food chains discussed with different interested food chain actors in five European countries. The standardised label was chosen as a first preferred scenario, although participants were also positive about the feasibility of introducing novel ICT approaches to traceability and information delivery. Concerns were raised about accountability, upkeep of food allergy data bases, and the additional costs for the services to the food industry