Analysis of X-ray and EUV spectra of solar active regions

Data acquired by two flights of an array of six Bragg crystal spectrometers on an Aerobee rocket to obtain high spatial and spectral resolution observations of various coronal features at soft X-ray wavelengths (9-23A) were analyzed. The various aspects of the analysis of the X-ray data are described. These observations were coordinated with observations from the experiments on the Apollo Telescope Mount and the various data sets were related to one another. The Appendices contain the published results, abstracts of papers, computer code descriptions and preprints of papers, all produced as a result of this research project

On Gender Differences in the Distribution of um and uh

While the so-called “fillers” um and uh share a great deal in the way of interpretation, association, and usage, they are far from perfect substitutes. Previous corpus research, focusing primarily on British English, has identified a number of social and discursive factors with which filler usage can vary, including pause length and position in an utterance and speaker age, gender, and social class (Rayson et al. 1997, Clark and Fox Tree 2002, Tottie 2011, inter alia). Building on such research, the present paper investigates social variation in the use of um and uh in the United States. In particular, the paper documents the results of two corpus-based investigations of women’s and men’s usage of um and uh demonstrating that, among the speakers represented in the corpora, women on the aggregate had a far higher ratio of um tokens to uh tokens (um/uh ratio) than did men. The first of the two corpora examined is a collection of 992 transcripts from three speed-dating events held for graduate students at an American university in 2005. In this corpus, women’s average um/uh ratio is more than 3.5 times that of men. An analysis of gendered filler usage in the Switchboard Corpus (SWBC) yields a similar result: women’s average um/uh ratio in the SWBC is more than 2.5 times that of men. Data from the SWBC likewise suggest that this general trend persists across age groups and major U.S. dialect regions and, furthermore, tends to hold for speakers regardless of the gender of their interlocutors. The SWBC also provides evidence suggesting that um is gaining currency relative to uh; i.e., that there is a linguistic change in progress whereby the use of um relative to uh is on the rise. It is noted that not all men and women in the corpora exhibit filler usage in line with the aggregate-level trends, and that gendered linguistic differentiation should not be assumed to be a direct reflection of gender per se (Eckert 1989). A thorough understanding of the dynamics of gender and filler usage calls for an examination of the meanings and associations of um and uh and of speakers’ stances, objectives, and relation to their social world

Developing a Community Clinic to Address the Health Needs as Experienced by a Small Rural Village in Sierra Leone

Developing countries experience a disproportionate amount of health care inequities due to extreme poverty, lack of education, minimal resources and marginalization from health care services. Additionally, barriers such as access, availability and affordability prevent people from seeking care. Development of community based clinics can help to address the health disparities that the people of these countries often experience. Utilizing Madeleine Leininger\u27s Culture Care Theory and the Sunrise Enabler provide a framework on which to develop clinics and health care programs in ways that are culturally congruent and acceptable. This paper addresses the health needs of Manonkoh, a small village in Sierra Leone, utilizing the concept of community based clinics to address health inequities as experienced by the people of that village

Characteristics of STEM Success: A Survival Analysis Model of Factors Influencing Time to Graduation Among Undergraduate STEM Majors

Producing more graduates in Science, Technology, Engineering, and Mathematics (STEM), as well as ensuring students complete college in a timely manner are both areas of national public policy interest. In order to improve these two outcomes, it is imperative to understand what factors lead undergraduate students to persist in, and ultimately graduate with STEM degrees. This paper uses data from the Beginning Postsecondary Students Longitudinal Study, provided by The National Center of Education Statistics, to model the time to baccalaureate degree among STEM majors using a Cox proportional hazard model

Simple manipulation of a microwave dressed-state ion qubit

Many schemes for implementing quantum information processing require that the atomic states used have a non-zero magnetic moment, however such magnetically sensitive states of an atom are vulnerable to decoherence due to fluctuating magnetic fields. Dressing an atom with an external field is a powerful method of reducing such decoherence [N. Timoney et al., Nature 476, 185], even if the states being dressed are strongly coupled to the environment. We introduce an experimentally simpler method of manipulating such a dressed-state qubit, which allows the implementation of general rotations of the qubit, and demonstrate this method using a trapped ytterbium ion

A New Template Family For The Detection Of Gravitational Waves From Comparable Mass Black Hole Binaries

In order to improve the phasing of the comparable-mass waveform as we approach the last stable orbit for a system, various re-summation methods have been used to improve the standard post-Newtonian waveforms. In this work we present a new family of templates for the detection of gravitational waves from the inspiral of two comparable-mass black hole binaries. These new adiabatic templates are based on re-expressing the derivative of the binding energy and the gravitational wave flux functions in terms of shifted Chebyshev polynomials. The Chebyshev polynomials are a useful tool in numerical methods as they display the fastest convergence of any of the orthogonal polynomials. In this case they are also particularly useful as they eliminate one of the features that plagues the post-Newtonian expansion. The Chebyshev binding energy now has information at all post-Newtonian orders, compared to the post-Newtonian templates which only have information at full integer orders. In this work, we compare both the post-Newtonian and Chebyshev templates against a fiducially exact waveform. This waveform is constructed from a hybrid method of using the test-mass results combined with the mass dependent parts of the post-Newtonian expansions for the binding energy and flux functions. Our results show that the Chebyshev templates achieve extremely high fitting factors at all PN orders and provide excellent parameter extraction. We also show that this new template family has a faster Cauchy convergence, gives a better prediction of the position of the Last Stable Orbit and in general recovers higher Signal-to-Noise ratios than the post-Newtonian templates.Comment: Final published version. Accepted for publication in Phys. Rev.