227 research outputs found
Evaluating a historical medical book collection.
Background: After several years of storing a large number of historical medical books that had been weeded from the general collection, the University of New Mexico Health Sciences Library and Informatics Center developed a set of evaluation criteria to determine whether the material should be kept and included in the library catalog or discarded. The purpose of this article is to share lessons learned in evaluating and processing a historical medical book collection. The authors share how we determined review criteria as well as cataloging and processing procedures.
Case Presentation: Best practices for evaluating, cataloging, and processing historical library material were determined through a literature search and then reviewed and adapted for application to this project. Eight hundred sixty-two titles were selected to add to the catalog and were added to a shelving location in our offsite storage facility.
Conclusions: These materials are now discoverable in the library\u27s catalog for library users who are interested in historical research, and the materials have been processed for easy retrieval as well as preservation purposes
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IR DIAGNOSTICS FOR DYNAMIC FAILURE OF MATERIALS
This project explores the thermodynamics of dynamic deformation and failure of materials using high-speed spatially-resolved infrared (IR) measurements of temperature. During deformation mechanical work is converted to different forms of energy depending on the deformation processes. For example, it can be dissipated as heat in purely plastic deformation, stored as strain energy in dislocations in metals and in oriented polymeric molecular structures, and expended during the generation of new surfaces during damage and fracture. The problem of how this work is converted into these various forms is not well understood. In fact, there exists a controversy for the relatively simple case regarding the amount of work dissipated as heat during uniform plastic deformation. The goals of this work are to develop dynamic IR temperature measurement techniques and then apply them to gain a better understanding of the dynamic failure processes in both metals and polymeric composite materials. The experimental results will be compared against predictions of existing constitutive models and guide the development of higher fidelity models if needed
Metal-Insulator Transition Accompanied with a Charge Ordering in the One-dimensional t-J' Model
We study the metal-insulator transition accompanied with a charge ordering in
the one-dimensional (1D) t-J' model at quarter filling by the density matrix
renormalization group method. In this model the nearest-neighbor hopping energy
t competes with the next-nearest-neighbor exchange energy J'. We have found
that a metal-insulator transition occurs at a finite value of t/J'; (t/J')_C =
0.18 and the transition is of first order. In the insulating phase for small
t/J', there is an alternating charge ordering and the system behaves as a 1D
quantum Heisenberg antiferromagnet. The metallic side belongs to the
universality class of the Tomonaga-Luttinger liquids. The quantum phase
transition is an example of melting of the 1D quantum Heisenberg
antiferromagnet.Comment: 4 pages, 6 Postscript figures, REVTeX, submitted to Phys. Rev.
Electrical Resistivity and Thermal Expansion Measurements of URu2Si2 under Pressure
We carried out simultaneous measurements of electrical resistivity and
thermal expansion of the heavy-fermion compound URu2Si2 under pressure using a
single crystal. We observed a phase transition anomaly between hidden (HO) and
antiferromagnetic (AFM) ordered states at TM in the temperature dependence of
both measurements. For the electrical resistivity, the anomaly at TM was very
small compared with the distinct hump anomaly at the phase transition
temperature T0 between the paramagnetic state (PM) and HO, and exhibited only a
slight increase and decrease for the I // a-axis and c-axis, respectively. We
estimated each excitation gap of HO, Delta_HO, and AFM, Delta_AFM, from the
temperature dependence of electrical resistivity; Delta_HO and Delta_AFM have
different pressure dependences from each other. On the other hand, the
temperature dependence of thermal expansion exhibited a small anomaly at T0 and
a large anomaly at TM. The pressure dependence of the phase boundaries of T0
and TM indicates that there is no critical end point and the two phase
boundaries meet at the critical point.Comment: 4 pages, 4 figure
Volume 41, Number 3, September 2021 OLAC Newsletter
Digitized September 2021 issue of the OLAC Newsletter
Volume 41, Number 2, June 2021 OLAC Newsletter
Digitized June 2021 issue of the OLAC Newsletter
Volume 40, Number 4, December 2020 OLAC Newsletter
Digitized December 2020 issue of the OLAC Newsletter
Volume 40, Number 3, September 2020 OLAC Newsletter
Digitized September 2020 issue of the OLAC Newsletter
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