152 research outputs found
THE RUBY LASER AS A RAMAN SOURCE
No full textNow at the Physics Dept., Washington, University, St. Louis, Missouri. S. P. S. Porto And D. L. Wood, J. Opt. Soc. Am, 52, 251, 1962.Author Institution: Bell Telephone Laboratories Incorporated“The ruby laser has been used successfully by Porto and Wood as a source of Raman The main difficulty in their original experiments wag the large number of flashes necessary to obtain the effect even for and . Recent improvements in our instrumentation, the most important of which is a more powerful later, has mode it possible to obtain tile Raman effect of vibration if benzene in one laser burst. Details of the instrumentation will be discussed well as the possibility of using the gas lasers as source for the Raman effect.
Writing and the rights of reality: usurpation and potentiality in Derrida, Plato, Nietzsche, and Beckett
Get PDFThe thesis critically evaluates Jacques Derrida's conferral of the rights of reality on writing, focussing on his theory of an arche-text in light of the speculative nature of this theory. The theory is initially considered in the context of Derrida's elucidation of the usurpatory status of writing within the Platonic and Nietzschean texts. This consideration reveals an admission of writing's usurpatory status by both writers while at the same time demonstrating their awareness of the intrinsically speculative nature of this view, the significance of writing lying in its ability to exteriorise the radically indeterminate status of consciousness m relation to reality rather than its ability to displace consciousness or reality The analyses, therefore, not only bring the Derridean hypothesis of a repressive or phonocentric metaphysical episteme into question but also exhibit the historical and philosophical role of potentiality in relation to writing, writing's ultimate significance lying in its capacity to exteriorise our existence as a mode of potentiality. Accordingly, in the second half of the thesis the Derridean theory of writing is countered with a specifically Aristotelian theory of the text as it is exhibited in the prose of Samuel Beckett, an author whose significance lies in his close alignment with Derridean theory within contemporary criticism. It is demonstrated that this identification has obviated an awareness of the significance of potentiality within the Beckettian text, his work consequently being appraised in the previously neglected context of Aristotelian metaphysics
Correction to: Pictorial review of multiparametric MRI in bladder urothelial carcinoma with variant histology:pearls and pitfalls
Get PDFThe original version of this article unfortunately contained a mistake. The co-author name “Lisa Ruby” was missed to include in the author group. However, now it is corrected.</p
A critical analysis of research related to attitudes toward low-income families and services provided by public school systems
Get PDFIncludes bibliographical references
The words beneath the sand: an examination of the works of three Virgin Islands poets, Cyril Creque, J. P. Gimenez, and J. Antonio Jarvis, 1995
No full textThis study is an excavation and examination of the works of Virgin Islands poets, Cyril Creque, I. P. Gimenez, and Antonio Jarvis, who wrote in the first half of the twentieth century. It looks at the historical and literary context that fostered them and provides a thorough study of one aspect of each man's poetry. In particular Creque's Romanticism is examined, as are Gimenez's vernacular poems, and Jarvis' dual consciousness. All three are examined from the perspective of the tensions created by their being products of the United States Virgin Islands, a territory at once Caribbean and American. The study set out to refute the assertions of critics that Virgin Islands poets were mere imitators of the European style. What has been revealed is a rich tapestry of original imagery and language, reflective of the Virgin Islands unique history and culture. A thorough examination of selected poems of each writer was conducted, as was research on each writer. This research was supported by available data and to a significant extent by information gathered from interviews with persons who knew the subjects of the study. This dissertation is, most likely, the first comprehensive critical work on Virgin Islands poetry and on Creque, Gimenez, and Jarvis. As such it will be useful to scholars interested in the literature of the Virgin Islands and also of the Caribbean and the United States of which the territory is a part. It verifies, not only the presence of a poetic heritage, but testifies to its quality as well as its significance in the two poetic traditions of which it is a part
The ‘insider/outsider’ dilemma of ethnography: Working with young children and their families in cross-cultural contexts
No full textIn this article we unravel the difficulty of being researchers in the homes and classrooms of children and
their families whose origins are, for one of us, very different and, for the other, very similar to our own.
We first situate our work within theories of early socialization and literacy teaching which underpin our
understanding of how young children in cross-cultural contexts learn. We then turn to the question of
working with the families and teachers of these children which poses dilemmas not explained by the theories
presented. We illustrate these through a series of vignettes typifying both the ‘Outsider’ and the ‘Insider’ role.
The stories highlight paradigmatic moments of complexity, clashes or collusion which we unpick in terms of
their generalizability for others working in the field. Finally, we extend theories of dialogue in our search for
a methodology for collaborative work in future cross-cultural ethnographic studies
A study of the effects of African Art experiences upon the achivement and attitude of African American students in the study of geometry, 1998
Get PDFThe purpose of this study was to examine the effectiveness of African art to teach geometric concepts and skills to African American students. Specifically, the study sought to determine if there was a significant difference between the performance of students enrolled in the two geometry classes and in geometry achievement and mathematics attitude. Two intact informal geometry classes who were performing below grade level on the basis of norms as established by the ITBS-M scores administered in the spring were selected for the study. Student gains between pretest scores and posttest scores on a geometry achievement test and a student attitude survey were analyzed using a two-tailed t-test for independent samples. The nonequivalent pretest-posttest control group design was used to test group differences between the control group and treatment group. This study found that there was a significant difference between the pretest and posttest scores of the treatment group and control group on the IGAT. There was however, no significant difference between the groups in attitude toward mathematics. The treatment group did show the more improved attitudes toward mathematics than did the control group. This study concluded that for this urban group of African American high school students the use of African art activities and materials was a more effective instructional method in developing students' achievement levels in geometry. Further, the findings suggested that this culturally based approach helped sustain and reinforce students' positive attitudes towards mathematics
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The Moral Philosophy of James Boswell
No full textIt is the purpose of the author to outline briefly some of the intellectual ideas relating to the nature of man, his conception of religion, his social manners and customs, and to reveal, through the "Hypochondriack" essays, that James Boswell was a peculiarly eighteenth-century figure in certain aspects of his moral philosophy
The effects of graphing calculators on the mathematical achievement and attitudes of urban students in high school geometry, 1998
Get PDFThis study examined the impact of the graphing calculator on performance and attitudes of urban students in high school geometry. The design for this study was true experimental, quantitative, and pretest-posttest control group design with 30 subjects, who were African Americans, in each group. The graphing calculator was used with the treatment group. The statistical procedures used were the F-Test and ANOVA. A Prentice Hall Geometry Achievement Test was used as a pretest and posttest to measure change due to treatment. A Mathematics Attitude Inventory was used as a pretest and posttest to measure change in academic attitude. The study was based on the logical conditional that if urban students perform poorly in mathematics; and if the graphing calculator increases mathematics achievement in general, and improves attitudes toward mathematics, then can the inclusion of graphing calculators on a greater scale increase the mathematical performance and attitudes of these students? The findings were that there were significant differences in the Geometry Achievement Test, the Conceptual Subtest, and the Procedural Subtest scores in favor of the treatment group. However, no significant difference was observed in the scores obtained from the Mathematics Attitude Inventory. The post inventory scores of the treatment group, however, reflected less anxiety and more enjoyment while the control group�s scores reflected more anxiety and less enjoyment. The conclusions were that the graphing calculator, when used as an instructional tool, does improve the performance and probably the attitudes of urban students enrolled in high school geometry
SOME TOPICS ON THE DEREGULATION OF THE POWER INDUSTRY IN THE UNITED STATES
Get PDFThis is a student report prepared for EE635, Economic Operation and Control of Interconnected Power Systems, for the Spring, 1992 semester at Purdue University. The assigned topic to the class was to discuss and describe some aspects of the deregulation of the United States power industry. The first chapter by Charles Thompson deals with the wheeling and transmission losses due to power exchange. This topic has been a main bottleneck for accountants and engineers in fully realizing advantages in a deregulated power environment. Perhaps the core of deregulation, the Public Utility Regulatory Policies Act (PURPA), is discussed and described by Patrick Lyons in Chapter 11. A description of the 1978 act, its amendments, and a commentary on the act is presented. The third and fourth chapters deal with demand side management (DMS). Chapter I11 by Ramanujam Ramabhadran focuses on the industrial sector and Chapter N by Kevin Karagory moves to the residential and commercial sectors. The last chapter deals with one small element of control of power flow in the transmission network. This is the use of high voltage DC systems for power flow control. The chapter describes HVDC systems in general and their control possibilities. Mr. Paul Ruby, the author of the chapter, is working in the solid-state area. For this reason, some special emphasis is made on devices in this chapter. Although this report is an incomplete sampling of topics on consequences of PURPA and deregulation, it is meant to be an introduction to the topic and a brief but representative sampling of topics in this complex area
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