Are central cities coming back? the case of Chicago

Chicago (Ill.)

Complex Questions, Evolving Answers: Creating a Multidimensional Assessment Strategy to Build Support for the “Teaching Library”

Since 2001, librarians at Oregon State University\u27s Valley Library have been working to build a teaching library supported by a clearly articulated instruction program. From the start, we believed that we needed to assess the teaching library\u27s impact, not only to determine the success or failure of our efforts but also to demonstrate the need for intentional, proactive in formation literacy instruction on our campus. No single assessment tool or method proved adequate to effectively measure student learning happening both inside and outside the library. We describe our evolving, multi-pronged approach to measuring the impact of the library on student learning in the context of current assessment practices in academic libraries and higher education

High repetition rate UV ultrafast laser inscription of buried channel waveguides in Sapphire: Fabrication and fluorescence imaging via ruby R lines

We report on the fabrication of buried cannel waveguides in Sapphire crystals by 250-kHz high repetition rate ultrafast laser inscription with 385 nm pulses. The propagation properties of the waveguides were studied as a function of the writing conditions. The micro-fluorescence analysis of the R lines generated by trace Cr3+ dopant in Sapphire is used to elucidate the micro-structural modifications induced in the crystal network. It is revealed that waveguide has been formed due to local dilatation of the Sapphire network generated in the surroundings of the focal volume. The refractive index increment due to the dilatation induced electronic polarizability enhancement has been estimated to be of the order of Δn ≈10-4. © 2009 Optical Society of America

Ending Social Work\u27s Grudge Match: Problems Versus Strengths

Some in social work have called for a paradigm shift away from a focus on problems to a focus on strengths, empowerment, and capacity building. This call sets up an unnatural dichotomy, asking social workers to identify with one side or another. In this article, we review social work history to argue that the best social work practice has always maintained a dual focus on both problems and capacity building. Throughout our history, those who championed a problem-oriented practice also emphasized strengths and growing client capacity, and today\u27s strength-based, capacity-oriented practitioners typically advocate for the solving of consumer\u27s presenting problems

Airborne radar ground clutter return

Call number: LD2668 .T4 1964 M16Master of Scienc

Thermal stability of microstructural and optical modifications induced in sapphire by ultrafast laser filamentation

We report on the thermal stability of both structural and optical micromodifications created by ultrafast laser written filaments in sapphire crystals. By using the Cr3+ traces as optical probes, we have concluded that the filaments are constituted by both reversible and nonreversible defects with very different spatial locations. The strain field measured from the analysis of R lines has been found to be erased at the same time when the reversible centers are recombined (∼1100 °C). This fact seems to indicate that these defects act as pinning centers for the induced stress. Furthermore, we have found that the waveguide generated in the proximity of the filament disappear for annealing temperatures above 1100 °C. This clearly supports the assumption that waveguiding is produced by the strain stress induced refractive index increment based on the dominant electronic polarizability enhancement. © 2010 American Institute of Physics