The Acropolitan - v. 3, no. 2

In this issue...Glee Club, Carroll College, Ore Diggers, Dancing Club, Thanksgiving, Co-Ed Club, Butte, Bozeman, Montana

The Acropolitan - v. 4, no. 3

In this issue...Mrs. Horace Vaughn Winchell, Anaconda Copper Mining Company, United Engineering Societies library, Geological Engineering, Columbia Gardens

The Amplifier - v. 3, no. 2

In this issue...Boeing Aircraft, Shell Oil Company, Hugo Pulju, mauled grizzly bear, Dean McAuliffe, Geology, Rocky Mountains, Coach Olsen, Petroleum Department

The Amplifier - v. 4, no. 3

In this issue...Geology, Sidney L. Groff, Mineral Collection, cheerleaders, Ski Club, Library, Newman Club, Ed Simonich, Butte Jaycees, Youth Center

Family Preservation Journal, 1998, Volume 3, Issue 2. (Entire issue)

Entire issue (large pdf file) Articles include: Getting to Know You: Psychoeducational Groups to Counter Social Isolation of Neglectful Mothers. Marianne Berry Intensive Family Preservation in Children's Mental Health: Predictors of Placement. Cathryn C. Potter An Innovative Family Preservation Program in an African American Community: Longitudinal Analysis. Patricia Ciliberti Chipping Away at the Monolith: Dispelling the Myth of Father Noninvolvement in Children's Early Literacy Development. Robert W. Ortiz

Simulating Energy Transfer and Upconversion in β-NaYF 4 : Yb 3+ , Tm 3+

The design of upconversion phosphors with higher quantum yield requires a deeper understanding of the detailed energy transfer and upconversion processes between active ions inside the material. Rate equations can model those processes by describing the populations of the energy levels of the ions as a function of time. However, this model presents some drawbacks: energy migration is assumed to be infinitely fast, it does not determine the detailed interaction mechanism (multipolar or exchange), and it only provides the macroscopic averaged parameters of interaction. Hence, a rate equation model with the same parameters cannot correctly predict the time evolution of upconverted emission and power dependence under a wide range of concentrations of active ions. We present a model that combines information about the host material lattice, the concentration of active ions, and a microscopic rate equation system. The extent of energy migration is correctly taken into account because the energy transfer processes are described on the level of the individual ions. This model predicts the decay curves, concentration, and excitation power dependences of the emission. This detailed information can be used to predict the optimal concentration that results in the maximum upconverted emission.

An die Hohe Verfassunggebende Versammlung der Freien Stadt Frankfurt: Gehorsamste dringliche Beschwerde und Bitte des Orientalisten L. H. Loewenstein aus Steinbach in Württemberg, derzeit in Rödelheim, seine, mit Umgehung jeder rechtlichen Formalität erfolgte polizeiliche Ausweisung und nachmalige Verhaftung betreffend: Hohe Verfassunggebende Versammlung! I. Die Ausweisung: Seit dem Jahre 1827 hatte ich mich (mit einer Unterbrechung von 3 1/2 Jahren) in Frankfurt aufgehalten ...

Boberach: Ein jüdischer Einwohner Frankfurts, dem nach einem Aufenthalt von 21 Jahren zunächst das Frankfurter Bürgerrecht in Aussicht gestellt worden war, beschwert sich darüber, daß er wegen seines Auftretens in Volksversammlungen verhaftet und ausgewiesen wurde und verlangt ein Gerichtsverfahren oder Genugtuung, nachdem er sich um Schutz durch seine württembergische Heimatbehörde bemüht hat

{[N.N.], Szenenfoto, Gruppenbildnis, in: Richard Wagner: Die Meistersinger von Nürnberg, 3. Akt, 2. Szene, Frankfurt a. M.: Opernhaus

Signatur des Originals: S 36/F12003

{[N.N.], Szenenfoto, Gruppenbildnis, in: Richard Wagner: Die Meistersinger von Nürnberg, 3. Akt, 2. Szene, Finale, Frankfurt a. M.: Opernhaus

Signatur des Originals: S 36/F12004