416 research outputs found
Bryce DeWitt referee report on paper, "Everett's Theory and the 'Many Worlds' Interpretation"
No full textAround 1988, Bryce DeWitt was asked to referee a paper by an author who argued that that DeWitt's version of Hugh Everett's theory was not true to Everett's original work. In his referee report, DeWitt offers to "set the record straight" about his interpretation of Everett's work. This is a copy of DeWitt's referee report. A version of the reviewed paper was subsequently published in 1990 in the American Journal of Physics. At the request of the DeWitt estate, the name of the author of the paper has been redacted. For further details see Byrne, P. (2010). The Many Worlds of Hugh Everett III. Oxford University Press.The estate of Bryce Dewitt
Carissa Bryce Christensen
No full textCarissa Bryce Christensen is an internationally known expert on the space industry and technology forecasting. She led the creation of widely used data tools now considered global metrics for the commercial space and satellite sectors, providing non-advocate, data-driven insights. She is a frequent speaker and author on space and satellite trends, serves as a strategic advisor to government and commercial clients, and has been an expert witness and testified before Congress on market dynamics. Ms. Christensen is the CEO of Bryce Space and Technology, LLC (formerly a division of The Tauri Group), an analytic consulting firm. She is also an active investor in technology-focused startups and advises several companies she has helped seed. She serves on the board of QxBranch, an early stage quantum computing firm.
Ms. Christensen holds a Master of Public Policy degree from Harvard University\u27s Kennedy School of Government, where she specialized in science and technology policy. She also completed the General Course in Government at the London School of Economics and was a Douglass Scholar at Rutgers University.
Ms. Christensen is an Associate Fellow of The American Institute of Aeronautics and Astronautics Association.https://commons.erau.edu/space-congress-bios-2018/1022/thumbnail.jp
Alfredo Bryce Echenique's word
No full textEn este artículo realizaremos una lectura panorámica del universo narrativo del escritor Alfredo Bryce Echenique. Podría decirse que toda la obra de Bryce se fundamenta en dos grandes ejes temáticos. Por un lado, Bryce es uno de los grandes cronistas de la burguesía peruana en novelas como Un mundo para Julius, No me esperen en abril y El huerto de mi amada. Por otro, una parte importante de su quehacer novelístico desde Tantas veces Pedro (1977) en adelante ha explorado la idiosincrasia de la identidad peruana ubicando a sus personajes en un mundo cultural ajeno al propio y viviendo un singular exilio. Todas las novelas de Bryce examinan la psicología del sujeto desclasado, antiheroico y solitario, que a menudo vive intensas experiencia sentimentales que subrayan su desarraigo en el mundo. La obra de Bryce exhibe siempre una voz propia para narrar, caracterizada por una oralidad siempre expansiva y envolvente y el despliegue de un humor irónico, corrosivo y revelador.Since the publication of his first novel, Un mundo para Julius (1970), Al-fredo Bryce Echenique can be considered an oustanding chronicler of Peru’s ruling class, exposing its many social and moral contradictions. While the author will return to this topic time and again, in other works, such as Tantas veces Pedro (1977) and La vida exagerada de Martín Romaña (1981), Bryce is also a keen explorar of Peruvian identity through the experience of exile. Orality and humor are at the core of his unique style of writing to showcase the trials and tribulations of his many anti-heros
Analysis of the Prompt Energy and Ab Initio Spectra with the Daya Bay Reactor Neutrino Experiment
No full textTheorized in the 1930s and discovered in the 1950s, neutrinos have puzzled physicists for decades. One method of studying neutrinos and their properties is measuring energy spectra produced by interactions of antineutrinos which come from beta decays of isotopes in nuclear reactors. With precise enough detectors, the antineutrino spectra of specific isotopes, also referred to as fine structure, may be observed. In this study, theoretical models of antineutrino energy spectra are compared with measured energy spectra from the Daya Bay Reactor Neutrino Experiment to test if the resolution of Daya Bay's detectors is precise enough to measure fine structure
Book Review: Gunn, A. (2023) Teaching Excellence? Universities in an age of student consumerism. London; Thousand Oaks, California: SAGE.
No full textBook Review:
Gunn, A. (2023) Teaching Excellence? Universities in an age of student consumerism. London; Thousand Oaks, California: SAGE.
Rosie Bryce
Manchester Metropolitan University
Corresponding author: [email protected]
Key words: Teaching excellence, TEF, marketisation, consumerism, higher educatio
Energy Scale Study for PROSPECT's Measurement of the Antineutrino Spectrum of 235U
No full textNeutrinos from nuclear fission reactors have been widely studied in particle and nuclear physics. In the last ten years, the antineutrino flux and spectrum were measured independently by short baseline reactor experiments. Both flux and spectrum measurements showed discrepancies compared to theoretical models based on historical measurements and nuclear databases. These discrepancies hint at sterile neutrino oscillation at the eV mass scale, as well as an incomplete theoretical model. PROSPECT, the Precision Reactor Oscillation and Spectrum experiment, was built to probe for sterile neutrino oscillations and precisely measure the reactor antineutrino spectrum from a highly 235U enriched reactor. The PROSPECT antineutrino detector is an optically segmented liquid scintillator detector deployed at seven meters to nine meters from the High Flux Isotope Reactor at Oak Ridge National Laboratory. This dissertation details the analysis to calibrate the energy scale of the PROSPECT antineutrino detector, an essential step for both the oscillation and spectrum measurements. To characterize the nonlinear detector energy response, a unique calibration and analysis strategy was developed to overcome challenges brought on by particle multi-segment scattering within the PROSPECT detector. With the calibrated scale for energy reconstruction, PROSPECT measured of the antineutrino spectrum from a 235U-burning reactor
Physics at the MeV-Scale in Liquid Argon Time Projection Chambers
No full textThe liquid argon time projection chamber (LArTPC) is the detection technology chosen for several Fermilab-based neutrino experiments. This technology will be used in studies of neutrino cross-sections and oscillations, neutrinos from supernovae as well as a variety of studies of beyond the Standard Model physics. This thesis explores the use of these detectors to study MeV-scale activity. MeV-scale electrons arising from Compton scatters of deexcitation photons and photons from inelastic neutron scattering in neutrino-nucleus interactions are reconstructed using novel methods presented here. This work represents the first demonstration of MeV-scale physics capabilities in a LArTPC neutrino experiment as well as the first observation of neutrino-produced photons from nuclear de-excitation and inelastic neutron scattering. A search for millicharged particles, postulated by theories of beyond the standard model physics, is also performed using data from a LArTPC and the low-energy reconstruction techniques developed. The results set world-leading bounds on the parameter space of millicharged particles. The work in this thesis demonstrates that studies of MeV-scale activity and new physics are possible with LArTPC technology and provides the foundation for future LArTPC studies of low energy neutrinos and new physics
(Re)Discovering America: James Bryce and The American Commonwealth
No full textJames Bryce's The American Commonwealth (1888) seeks to understand and explain the inner workings of America, which at that time was the only country in the world to boast a democracy characterized by universal manhood suffrage. Despite offering a broader, more detailed study of America as a whole than had yet been undertaken (including the first substantive description of the sub-state level of politics), The American Commonwealth is today largely viewed as a dated work of political science from America’s Gilded Age. In fact, this work represents Bryce’s attempt to bring harmony to the tensions between certain accounts of human nature that were present in America at the turn of the 20th century as well as providing important insight into the development of America at a most crucial point in her history.This dissertation presents Bryce’s keen observations and methodology as an early manifestation of incorporating methods of the empirical sciences into the social sciences. As was the case with many other political scientists at this time (including Woodrow Wilson, who is thoroughly discussed here as an apt comparison), Bryce worked to incorporate the staggering amounts of information that could now be gathered through empirical methods into his studies. However, Bryce did not do so at the expense of the broader classical political tradition. Bryce brings what superficially appear to be opposing traditions into a harmony, and his success in doing so offers his readers the strongest defense as to why The American Commonwealth is still deserving of academic attention.Works by Alexis de Tocqueville and James Ceaser provide context to the political and intellectual world into which Bryce takes his readers. These are used to frame the larger debate between the views presented by Bryce, Wilson, and Progressives generally concerning human nature, the aims of government in society, the role of individual sovereignty, and the circular methods through which public opinion both creates and is created by these aforementioned views. In addition to Bryce’s arguments presented in The American Commonwealth, particular attention will be given to a speech Bryce delivered in 1908 to the American Political Science Association in which he discussed the relationship between the hard sciences and the social sciences, and the implications for political science when they are intermingled.Political scienceAmerican historyClassical Political Thought, Empiricism, James Bryce, Public Opinion, The American Commonwealth, Woodrow WilsonPoliticsDegree Awarded: Ph.D. Politics. The Catholic University of Americ
Revised checklist of the vascular plants of Bryce Canyon National Park, Utah
No full textPrior to 1960, when the senior author wrote a dissertation on the plant ecology of the Paunsaugunt Plateau forests of Bryce Canyon National Park, relatively little plant taxonomic work had been done in the area. A checklist was prepared in 1971 that included 218 species of higher plants. During the field seasons 1978, 1979, and 1980, additional plants were collected during a second plant community study of the forests. The junior author spent the summer of 1980 at the park collecting plants in additional plant communities and organizing the herbarium collection. This checklist includes the additional species collected and updates the nomenclature of the vascular plants presently known to occur within the boundaries of Bryce Canyon National Park
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