5,157 research outputs found
Zone Leveling Crystal Growth of Thermoelectric PbTe Alloys with Sb_(2)Te_3 Widmanstätten Precipitates
Unidirectional solidification of PbTe-rich alloys in the pseudobinary PbTe-Sb_(2)Te_3 system using the zone leveling technique enables the production of large regions of homogeneous solid solutions for the formation of precipitate nanocomposites as compared with Bridgman solidification. (PbTe)_(0.940)(Sb_(2)Te_3)_(0.060) and (PbTe)_(0.952)(Sb_(2)Te_3)_(0.048) alloys were successfully grown using (PbTe)_(0.4)(Sb_(2)Te_3)_(0.6) and (PbTe)_(0.461)(Sb_(2)Te_3)_(0.539) as seed alloys, respectively, with 1 mm h^(–1) withdrawal velocity. In the unidirectionally solidified regions of both alloys, Widmanstatten precipitates are formed due to the decrease in solubility of Sb_(2)Te_3 in PbTe. To determine the compositions of the seed alloys for the zone leveling experiments, the solute distribution in solidification in the PbTe-richer part of the pseudobinary PbTe-Sb_(2)Te_3 system has been examined from the concentration profiles in the samples unidirectionally solidified by the Bridgman method
Data-driven modeling of the olfactory neural codes and their dynamics in the insect antennal lobe
Recordings from neurons in the insects' olfactory primary processing center,
the antennal lobe (AL), reveal that the AL is able to process the input from
chemical receptors into distinct neural activity patterns, called olfactory
neural codes. These exciting results show the importance of neural codes and
their relation to perception. The next challenge is to \emph{model the
dynamics} of neural codes. In our study, we perform multichannel recordings
from the projection neurons in the AL driven by different odorants. We then
derive a neural network from the electrophysiological data. The network
consists of lateral-inhibitory neurons and excitatory neurons, and is capable
of producing unique olfactory neural codes for the tested odorants.
Specifically, we (i) design a projection, an odor space, for the neural
recording from the AL, which discriminates between distinct odorants
trajectories (ii) characterize scent recognition, i.e., decision-making based
on olfactory signals and (iii) infer the wiring of the neural circuit, the
connectome of the AL. We show that the constructed model is consistent with
biological observations, such as contrast enhancement and robustness to noise.
The study answers a key biological question in identifying how lateral
inhibitory neurons can be wired to excitatory neurons to permit robust activity
patterns
A Jew from Nebraska: An Actors Attempt at Stand-up Comedy
Stand-up comedy has been a major influence on American culture and has given the Everyman the ability to laugh at ourselves. Stand-up comedians have been performing in nightclubs, bars, clubs, and, most importantly, theatres for the past 60 years. Stand-up comedy can take many forms: a monologue of entertaining incidents that form a story, or a string of one-liners, or a succession of jokes. This performance project and thesis is an examination and an attempt at the art form that we call stand-up comedy. It will answer the question of what is the best approach to writing comedy for an actor finishing his graduate acting program. It will also challenge the idea of simple joke-telling versus storytelling and examine the following question: Can anyone be a standup comedian? A research of the history, an analysis of the practitioners, and training from graduate studio work will support the discovery of a practical approach to writing and performing a stand-up comedy routine
Creating Talent: The Effect of Environment on the Development of Musical Skill
Despite literature investigating the effects of ecology on student development, very little research has been conducted concerning the influence of the adolescent living environment on the development of musical skills related to music performance. Gaining a clear understanding of adolescent environmental factors\u27 influence on musical skill development will afford more students the opportunity to participate in music education and performance. Through a qualitative research approach, this study aims to investigate the effect of adolescent living environment on musical skill development by interviewing eight professional opera singers. In exploring the findings from this research, similarities in adolescent living environment have been evaluated, their effects on skill development has been investigated. This study illustrates how environmental factors related to the individual’s circumstance, opportunity, education, and ideology influences musical skill development rather than innate talent in predicting professional success and expertise. This research provides evidence of the universality of music education for all learners and highlights the capacity of all human beings to develop skills. Utilizing this research, educators across all disciplines can provide data supporting the influence of environmental factors on skill development. Understanding how misconceptions of talent discourage music participation and providing evidence that all students have a capacity towards musical skill development, this research affords music education a valuable tool in advocating for musical opportunities for all learners
Creating Talent: The Effect of Environment on the Development of Musical Skill
Despite literature investigating the effects of ecology on student development, very little research has been conducted concerning the influence of the adolescent living environment on the development of musical skills related to music performance. Gaining a clear understanding of adolescent environmental factors\u27 influence on musical skill development will afford more students the opportunity to participate in music education and performance. Through a qualitative research approach, this study aims to investigate the effect of adolescent living environment on musical skill development by interviewing eight professional opera singers. In exploring the findings from this research, similarities in adolescent living environment have been evaluated, their effects on skill development has been investigated. This study illustrates how environmental factors related to the individual’s circumstance, opportunity, education, and ideology influences musical skill development rather than innate talent in predicting professional success and expertise. This research provides evidence of the universality of music education for all learners and highlights the capacity of all human beings to develop skills. Utilizing this research, educators across all disciplines can provide data supporting the influence of environmental factors on skill development. Understanding how misconceptions of talent discourage music participation and providing evidence that all students have a capacity towards musical skill development, this research affords music education a valuable tool in advocating for musical opportunities for all learners
City Poems And Urban Crisis, 1945 - Present
City Poems proposes that twentieth-century American city poets hold important concerns, commitments, and strategies in common with urban theorists and city planners. The study situates canonical and lesser-read city poetry, including work by William Carlos Williams, Charles Olson, Allen Ginsberg, George Oppen, Gwendolyn Brooks, and Wanda Coleman, among others, in relation to discourses of urban crisis. Following Raymond Williams, Henri Lefebvre, and James Scully, it approaches city poetry as a form of social action that holds particular value for practitioners of progressive city planning. Because poetic representations of cities influence public perceptions, City Poems suggests, they have the potential to shape private and government actions. The relationship between poetry and public life has become an increasingly urgent topic for American poets, in particular since the emergence of neoliberalism as the dominant political order in the 1980s. Applying insights from critical urban theory and reader-response criticism, City Poems suggests that poets and planners have shifted their responses to urban crisis in the wake of neoliberalism\u27s emergence from articulating comprehensive theories of the city to observing and responding to everyday practices in communities. Following through on this insight, the study analyzes the efforts of city poets and progressive planners to expand the range of knowledge that counts in defining the social and physical dimensions of cities and argues that experiential knowledge and affective engagement have proven to be crucial components in their visions of a more just and equitable urban future. The study\u27s main contributions are the commonalities it identifies in the practices of city poets, urban theorists, and city planners and the methodology it demonstrates of reading city poetry as a mode of insurgent urban practice
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