Digital Commons Network^™

Modified Control Software For Imaging Ultracold Atomic Clouds, Dwight L. Whitaker, A. Sharma, J. M. Brown

Pomona Faculty Publications and Research

A charge-coupled device (CCD) camera capable of taking high-quality images of ultracold atomic samples can often represent a significant portion of the equipment costs in atom trapping experiment. We have modified the commercial control software of a CCD camera designed for astronomical imaging to take absorption images of ultracold rubidium clouds. This camera is sensitive at 780 nm and has been modified to take three successive 16-bit images at full resolution. The control software can be integrated into a Matlab graphical user interface with fitting routines written as Matlab functions. This camera is capable of recording high-quality images at a …

Introducing Mediacommons, Kathleen Fitzpatrick

Pomona Faculty Publications and Research

At the moment, we imagine MediaCommons as a wide-ranging network with a relatively static point of entry that brings the participant into the MediaCommons community and makes apparent the wealth of different resources at his or her disposal. On this front page will be different modules highlighting what's happening in various nodes ("today in the blogs"; active forum topics; "just posted" texts from journals; featured projects). One module on this front page might be made customizable ("My MediaCommons"), such that participants can in some fashion design their own interfaces with the network, tracking the conversations and texts in which they …

On The Future Of Peer Review In Electronic Scholarly Publishing, Kathleen Fitzpatrick

Pomona Faculty Publications and Research

Over the last several months, as I've met with the folks from if:book and with the quite impressive group of academics we pulled together to discuss the possibility of starting an all-electronic scholarly press, I've spent an awful lot of time thinking and talking about peer review-how it currently functions, why we need it, and how it might be improved. Peer review is extremely important-I want to acknowledge that right up front-but it threatens to become the axle around which all conversations about the future of publishing get wrapped, like Isadora Duncan's scarf, strangling any possible innovations in scholarly communication …

On The Importance Of The Collective In Electronic Publishing, Kathleen Fitzpatrick

Pomona Faculty Publications and Research

We are paid, by and large, and whether we like it or not, for delivering certain kinds of knowledge-work to paying clients. We teach, we advise, we lecture, and so forth, and all of this is primarily done within the constraints of someone else's needs and desires. But the job also involves, or allows, to varying degrees, reserving some measure of our time and devotion for projects that are just ours, projects whose greatest benefits are to our own pleasure and to the collective advancement of the field as a whole. If we’re already operating to that extent within an …

The Male Dancer In The Middle East And Central Asia, Anthony Shay

Pomona Faculty Publications and Research

"That night ‘Abdi Jan’s troupe had been called so that the harem occupants could watch the show. Of course, you remember ‘Abdi well. Let me, nonetheless, give you a description of his looks. He was a lad of about twelve or thirteen, with large black eyes, languid and incredibly beautiful and attractive. His face was tanned and good-looking, his lips crimson, and his hair black and thick. Renowned throughout the town, the boy had a thousand adoring lovers. Being a dancer, however, he was unworthy of being anyone’s beloved." (Taj Al-Sultana 1993, 163) Within this quotation the reader may find …

Super Solutions Of The Dynamical Yang-Baxter Equation, Gizem Karaali

Pomona Faculty Publications and Research

Solutions of the classical dynamical Yang-Baxter equation on a Lie superalgebra are called super dynamical r−matrices. A super dynamical r−matrix r satisfies the zero weight condition if

[h ⊗ 1 + 1 ⊗ h, r(λ)] = 0 for all h ∈ ɧ, λ ∈ ɧ ∗ .

In this paper we classify super dynamical r−matrices with zero weight.

Complex Symmetric Operators And Applications, Stephan Ramon Garcia, Mihai Putinar

Pomona Faculty Publications and Research

We study a few classes of Hilbert space operators whose matrix representations are complex symmetric with respect to a preferred orthonormal basis. The existence of this additional symmetry has notable implications and, in particular, it explains from a unifying point of view some classical results. We explore applications of this symmetry to Jordan canonical models, self-adjoint extensions of symmetric operators, rank-one unitary perturbations of the compressed shift, Darlington synthesis and matrix-valued inner functions, and free bounded analytic interpolation in the disk.

Review: Stability Of Bases And Frames Of Reproducing Kernels In Model Spaces, Stephan Ramon Garcia

Pomona Faculty Publications and Research

No abstract provided.

Analyzing Dna Microarrays With Undergraduate Statisticians, Johanna S. Hardin, Laura Hoopes, Ryan Murphy '06

Pomona Faculty Publications and Research

With advances in technology, biologists have been saddled with high dimensional data that need modern statistical methodology for analysis. DNA microarrays are able to simultaneously measure thousands of genes (and the activity of those genes) in a single sample. Biologists use microarrays to trace connections between pathways or to identify all genes that respond to a signal. The statistical tools we usually teach our undergraduates are inadequate for analyzing thousands of measurements on tens of samples. The project materials include readings on microarrays as well as computer lab activities. The topics covered include image analysis, filtering and normalization techniques, and …

Conjugation And Clark Operators, Stephan Ramon Garcia

Pomona Faculty Publications and Research

No abstract provided.

Yeast Through The Ages: A Statistical Analysis Of Genetic Changes In Aging Yeast, Alison Wise '05, Johanna S. Hardin, Laura Hoopes

Pomona Faculty Publications and Research

Microarray technology allows for the expression levels of thousands of genes in a cell to be measured simultaneously. The technology provides great potential in the fields of biology and medicine, as the analysis of data obtained from microarray experiments gives insight into the roles of specific genes and the associated changes across experimental conditions (e.g., aging, mutation, radiation therapy, drug dosage). The application of statistical tools to microarray data can help make sense of the experiment and thereby advance genetic, biological, and medical research. Likewise, microarrays provide an exciting means through which to explore statistical techniques.

Intrinsic Linking And Knotting Of Graphs In Arbitrary 3–Manifolds, Erica Flapan, Hugh Howards, Don Lawrence, Blake Mellor

Pomona Faculty Publications and Research

We prove that a graph is intrinsically linked in an arbitrary 3–manifold M if and only if it is intrinsically linked in S³. Also, assuming the Poincaré Conjecture, we prove that a graph is intrinsically knotted in M if and only if it is intrinsically knotted in S³.

What I Learned At The Maa Digital Library Workshop, Gizem Karaali

Pomona Faculty Publications and Research

Toward the end of July 2006, an item appeared briefly on the MAA website. This was the call for participants for the MAA Digital Library Workshop. Curious surfers like me clicked on it to find the description of this workshop, which was to be held over the course of a weekend in October 2006 in Washington, DC. The announcement included a cryptic sentence of the form “The primary aims of the workshop are to provide an overview of the two MAA digital libraries and of the National Science Digital Library, and to prepare participants to offer a short workshop on …