1,039 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
Richards, Thomas Ephraim
No full textOral history interview with Thomas Richards regarding cattle ranching, Butch Cassidy, Lee's Ferry and Bryce Valley. Interview performed by daughter Halma Haas as part of the Utah State Historical Society Oral History Program
Highly efficient upconversion in Er3+ doped BaY2F8 single crystals: dependence of quantum yield on excitation wavelength and thickness
No full textThis manuscript presents a study of the upconversion (UC)
in barium yttrium fluoride (BaY2F8) single crystal doped with trivalent
erbium ions (Er3+) under excitation of the 4I13/2 level at three different
wavelengths: 1493 nm, 1524 nm and 1556 nm. The resulting UC emission at
around 980 nm has been investigated and it has been found that a thickness
optimization is required to reach high quantum yield values, otherwise
limited by self-absorption losses. The highest external photoluminescence
quantum yield (ePLQY) measured in this study was 12.1±1.2 % for a
BaY2F8:30at%Er3+ sample of thickness 1.75±0.01 mm, while the highest
internal photoluminescence quantum yield (iPLQY) of 14.6±1.5 % was
measured in a BaY2F8:20at%Er3+ sample with a thickness of 0.49±0.01
mm. Both values were obtained under excitation at 1493 nm and an
irradiance of 7.0±0.7 Wcm−2. The reported iPLQY and ePLQY values
are among the highest achieved for monochromatic excitation. Finally,
the losses due to self-absorption were estimated in order to evaluate the
maximum iPLQY achievable by the upconverter material. The estimated
iPLQY limit values were ∼19%, ∼25% and ∼30%, for 10%, 20% and 30%
Er3+ doping level, respectively
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
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
(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
The removal of inorganic contaminants using nanofiltration and reverse osmosis
No full textImproved methods of providing safe drinking water are essential in an era in which
demand for water is increasing but surface water supplies remain scarce. Desalination
of brackish groundwater via membrane filtration with nanofiltration and reverse
osmosis (NF/RO) offers a solution to this problem. As such, the overall motivation of
this study was to improve mechanistic understanding of NF/RO. The first main aim
was to evaluate the performance of a renewable energy membrane system previously
tested with real groundwater and varying energy conditions. Given sufficient solar
availability, the system reliably removed salts and inorganic contaminants, although
solute retention varied with energy (and consequently pressure and flow) and pH,
depending on dominant retention mechanisms. The second main aim was to assess the
specific impact of pH on inorganic contaminant removal in a bench-scale filtration
system. The speciation of boron, fluoride and nitrate was linked with ion retention as a
function of pH, with results suggesting that there may be important mechanisms such as
ion dehydration controlling transport in NF/RO, which would explain the high retention
of fluoride when compared to nitrate. The third main aim was to determine the
importance of ion hydration in determining transport using molecular dynamics
simulations of monovalent anions transporting through an idealized pore. Simulations
demonstrated that energy barriers of transport were strongly dependent on ion properties
and pore size and were directly attributable to dehydration. The final aim was to
experimentally verify molecular dynamics simulations by quantifying energy barriers
for ion transport in NF membranes. Experimentally-determined energy barriers were
also solute and membrane-specific, with fluoride having a higher barrier than other
solutes. Comparison of results with expected dehydration trends and molecular
dynamics corroborated that energy barriers in nanofiltration may be due to dehydration.
The results obtained in this thesis provide new insight into NF/RO transport
mechanisms, which may contribute to improvements in current technologies and
predictive models
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
Worlds of labor in South America: class, gender & political culture
No full textAuthor Iñigo García-Bryce presents his book ""Crafting the republic: Lima's artisans and nation-bulding in Peru, 1821-1879"" and author Elizabeth Quay Hutchison presents her book ""Labors appropriate to their sex: gender, labor and politics in urban Chile, 1900-1930"" as part of the Open Doors Speaker Series
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