E.M.B.A.: One-Year versus Two-Years?

Saint Joseph’s University’s Executive MBA Program, which began in 1990, is an innovative graduate degree program for experienced managers and emerging business leaders. The program provides a challenging, interactive learning environment to help working professionals realize their full leadership potential and prepare for the challenges of senior management positions. This non-traditional program encourages students to risk, probe and solve problems in a multi-task format

Negotiating an American history for modernism through the lens of the architectural exhibition

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Architecture, 2008.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Includes bibliographical references (p. 183-189).After modernism was conceptualized as the "International Style" at the Museum of Modern Art in 1932, historians and critics sought to legitimate American architecture through the construction of a linear ancestry which placed the beginnings of modernism in the nineteenth century, on American soil. Victorian-era revivalism complicated this thread, but it also served as the impetus for a revision of history. The possibilities of interpretation offered by the architectural exhibition, and its key evidence, the photograph, were critical to this endeavor. It is my contention that having first established modernism as the "International Style" and second, located its history in select architectural monuments of the nineteenth and early twentieth centuries, architectural historians and critics spent the remainder of the 1930s deemphasizing European influences by crafting an American heritage for modernism. While modernists initially chose to ignore this revival style architecture, their proliferation, popular appeal, and seeming discrepancies with the present, both socially and formally, inspired two exhibitions which examined these buildings more critically. Lincoln Kirstein employed the term "indigenous" with regard to his 1933 MoMA exhibition, Walker Evans: 19th Century Houses, in order to distance, but not disavow Victorian-era domesticity and society. Conversely, Henry-Russell Hitchcock utilized "vernacular" in his 1934 exhibition at Yale University, The Urban Vernacular of the Thirties, Forties, and Fifties: American Cities Before the Civil War, to establish a formal continuity between Greek Revival antebellum urban architecture and 1930s modernism. In part a reaction to Kirstein's claims, Henry-Russell Hitchcock produced a selective "vernacular" which made the nineteenth century past accessible as a functional precedent for modernist designers.(cont.) This thesis explores the construction, and the impact of these two efforts, which coded revivalism as something "native" to America in order to negotiate a relationship between the modernist present and its seemingly incompatible past.by Rebecca Suzanne Rahmlow.S.M

Formation of ultracold Rb 2 molecules in the v′′ = 0 level of the a 3Σ + u state via blue-detuned photoassociation to the 1 3Π g state

We report on the observation of blue-detuned photoassociation in Rb2, in which vibrational levels are energetically above the corresponding excited atomic asymptote. 85Rb atoms in a MOT were photoassociated at short internuclear distance to levels of the 13Πg state at a rate of approximately 5 × 104 molecules s−1. We have observed most of the predicted vibrational levels for all four spin–orbit components; 0+g, 0−g, 1g, and 2g, including levels of the 0+g outer well. These molecules decay to the metastable a3Σ+u state, some preferentially to the v′′ = 0 level, as we have observed for photoassociation to the v′ = 8 level of the 1g component

Using Molecules to Measure Nuclear Spin-Dependent Parity Violation

Nuclear spin-dependent parity violation arises from weak interactions between electrons and nucleons, and from nuclear anapole moments. We outline a method to measure such effects, using a Stark-interference technique to determine the mixing between opposite-parity rotational/hyperfine levels of ground-state molecules. The technique is applicable to nuclei over a wide range of atomic number, in diatomic species that are theoretically tractable for interpretation. This should provide data on anapole moments of many nuclei, and on previously unmeasured neutral weak couplings

An Easily Constructed, Tuning Free, Ultra-broadband Probe for NMR

We have developed an easy to construct, non-resonant wideband NMR probe. The probe is of the saddle coil geometry and is designed such that the coil itself forms a transmission line. The probe thus requires no tuning or matching elements. We use the probe with a spectrometer whose duplexer circuitry employs a simple RF switch instead of the more common lambda/4 lines, so the entire probe and spectrometer perform in an essentially frequency-independent manner. Despite being designed with electro- and magnetostatic formulas, the probe performs well at frequencies up to 150 MHz and beyond. We expect that with additional design effort, the probe could be modified for use at significantly higher frequencies. Because our construction method relies on commercial circuit fabrication techniques, identical probes can be easily and accurately produced

Development of Front Surface, Spectral Control Filters with Greater Temperature Stability for Thermophotovoltaic Energy Conversion

Spectral control is an important consideration in achieving high conversion efficiency with thermophotovoltaic (TPV) energy conversion systems. TPV modules using front surface filters as the primary spectral control device have demonstrated conversion efficiencies in excess of 20% with power densities in excess of 0.4 W/cm{sup 2}. The front surface filter we are developing is a short pass, long wavelength reflection filter consisting of an interference filter deposited on a plasma filter. The materials used in the interference filter must exhibit high broad band transmission and good film quality and sufficient temperature stability at the operating temperature of the TPV cells and over any potential temperature excursions that may occur. Three high refractive index materials that offer good potential for use in TPV spectral control filters are antimony selenide (Sb{sub 2}Se{sub 3}), antimony sulfide (Sb{sub 2}S{sub 3}), and gallium telluride (GaTe). The highest spectral efficiency has been demonstrated using Sb{sub 2}Se{sub 3}; however this material develops significant near infrared (NIR, 0.72-2.5 {micro}m) absorption at temperatures in excess of 90 C. The other two materials are being developed as high temperature alternatives to Sb{sub 2}Se{sub 3}. TPV filters using GaTe and Sb{sub 2}S{sub 3} have been designed and fabricated, and initial results indicate that GaTe based filters are capable of operation at temperatures of 150 C or greater. Measured performance of TPV filters containing Sb{sub 2}Se{sub 3}, GaTe and Sb{sub 2}S{sub 3} are presented, along with the impact that these have on TPV module performance