About the phase space of SL(3) Black Holes

In this note we address some issues of recent interest, related to the asymptotic symmetry algebra of higher spin black holes in $sl(3,\mathbb{R})\times sl(3,\mathbb{R})$ Chern Simons (CS) formulation. We compute the fixed time Dirac bracket algebra that acts on two different phase spaces. Both of these spaces contain black holes as zero modes. The result for one of these phase spaces is explicitly shown to be isomorphic to $W^{(2)}_3\times W^{(2)}_3$ in first order perturbations.Comment: improved presentatio

The Adapted Ordering Method for Lie Algebras and Superalgebras and their Generalizations

In 1998 the Adapted Ordering Method was developed for the representation theory of the superconformal algebras in two dimensions. It allows: to determine maximal dimensions for a given type of space of singular vectors, to identify all singular vectors by only a few coefficients, to spot subsingular vectors and to set the basis for constructing embedding diagrams. In this article we present the Adapted Ordering Method for general Lie algebras and superalgebras, and their generalizations, provided they can be triangulated. We also review briefly the results obtained for the Virasoro algebra and for the N=2 and Ramond N=1 superconformal algebras.Comment: Many improvements in the redaction for pedagogical purposes. Latex, 11 page

Evaluating Responses of Sugar Beet Cultivars to Fusarium Species in Greenhouse and Field Conditions

Fusarium yellows of sugar beet (Beta vulgaris L.) is becoming an important disease in Minnesota and North Dakota in the United States. One of the best ways to manage Fusarium yellows is to develop and use resistant cultivars. Responses of eight sugar beet cultivars to three Fusarium species were determined in the greenhouse and compared to the responses of the same eight cultivars grown in a field already infected by Fusarium yellows. There were significant and appreciable relationships between greenhouse and field studies for responses of eight sugar beet cultivars on Fusarium yellows. The estimated correlation coefficient for area under disease progress curve (AUDPC) between observations in fields and those in greenhouses was 0.987 (p<0.01). The mean AUDPC were significantly different among cultivars (p<0.01) in the greenhouse and in the field studies. Of the cultivars, Van der Have 46177 was the most susceptible, but Crystal R434 the most resistant. Crystal 820, Van der Have 66561, and Beta 4797R were resistant, and Beta 4818R, Seedex Magnum, and Hilleshog 2463Rz were moderately resistant. There was a strong negative relationship between the AUDPC and recoverable sucrose yield in the field experiments and the estimated coefficient of determination was 0.939 (p<0.01). It was concluded that greenhouse screening can act as a useful and reliable means to evaluate and select beet germplasms and/or accessions for resistance to Fusarium yellows.Peer reviewe

Exploring the Impact of the MassTransfer Program: A Look at Latina/ Latino Student Transfer Success at a Two Year Hispanic-Serving Institution into a Four Year Non-Hispanic University in Massachusetts

The majority of Latina/Latino students enrolling into higher education are doing so through community colleges. Latina/Latino students are not transferring at comparable rates to their peers. This study explored the impact of the MassTransfer program on the transfer success of Latina/Latino students at a Hispanic-Serving Institution (HSI) community college into a 4-year state university in Massachusetts. Twelve students were individually interviewed for this study. Six of the students attend an HSI community college. The remaining six students were enrolled in a Massachusetts state university and had successfully transferred from the HSI in this study. The MassTransfer program encourages degree specific articulation agreements between public community colleges and state universities. This study was conducted using qualitative research situated in an interpretive paradigm. Laura I. Rendón’s Validation Theory and Latina/Latino Critical Race Theory were utilized to explore Latina/Latino student transfer success. Increasing the diversity of the student body without institutional changes designed to better meet their needs often leads to lower retention rates. Understanding the validating factors that support Latina/Latino transfer and the unique obstacles these students encounter can assist colleges and universities to build targeted retention programs. This research concluded that the majority of Latina/Latino students interviewed rely on their family members as validating influences outside of the classroom. A majority of the students agreed that Latina/Latino faculty and staff also provided a sense of comfort and ease on the campus. Half of study participants could not take advantage of MassTransfer due to limited program offerings

Fabrications

The objects that surround us tell a story of our past, and act as physical stand ins for a person, place, or experience no longer present. My work explores the significance of objects and how we use them to preserve our memories and make them tangible. Memory is ephemeral and changes over time, simultaneously growing weaker and stronger. I use clay to accentuate this relationship, visually depicting both preservation and decay. Inspired by my personal narrative, I recreate specific objects of significance by hand. This results in subtle variations of the original, much like the changes in our memory over time. Each piece becomes a fabrication of an original object, just as our memories are a fabrication of the original experience. Themes of storage, disintegration, alteration, and addition reflect the processes involved in memory formation and the effect of time on our recall. Through this process, I am exploring how much our identity is reliant on our memories, how we preserve our past in order to inform our present, and the ways in which our objects serve as characters in our narrative of self

Universal R-C crossover in current-voltage characteristics for unshunted array of overdamped Nb-AlO_x-Nb Josephson junctions

We report on some unusual behavior of the measured current-voltage characteristics (CVC) in artificially prepared two-dimensional unshunted array of overdamped Nb-AlO_x-Nb Josephson junctions. The obtained nonlinear CVC are found to exhibit a pronounced (and practically temperature independent) crossover at some current I_{cr}=\left(\frac{1}{2\beta_C}-1\right)I_C from a resistance R dominated state with V_R=R\sqrt{I^2-I_C^2} below I_{cr} to a capacitance C dominated state with V_C=\sqrt{\frac{\hbar}{4eC}} \sqrt{I-I_C} above I_{cr}. The origin of the observed behavior is discussed within a single-plaquette approximation assuming the conventional RSJ model with a finite capacitance and the Ambegaokar-Baratoff relation for the critical current of the single junction

Manifestation of geometric resonance in current dependence of AC susceptibility for unshunted array of Nb-AlOx-Nb Josephson junctions

A pronounced resonance-like structure has been observed in the current dependence of AC susceptibility for two-dimensional array of unshunted Nb-AlOx-Nb Josephson junctions. Using a single-plaquette approximation, we were able to successfully fit our data assuming that resonance structure is related to the geometric (inductive) properties of the array.Comment: to appear in Physica C (in press