583 research outputs found
Verification of CPT-invariance of QED bound states for the production of muonium or antimuonium in scattering of electrons or positrons by nuclei
A possibility of a verification of CPT-invariance of QED for bound states by
example of muonium or antimuonium produced in reactions of scattering of
electrons or positrons by nuclei is considered. The number of events of the
muonium production is estimated for contemporary accelerators. The method of
the detection of muonium by measuring of oscillations of the decay curve caused
by the interference between the ground and excited state of muonium is
suggested. The admixture of the excited muonium to the final state is
calculated.Comment: 7 pages, 3 figures, Latex, published in JETP 74, 196 (2001),
corrected mistypes in eqs. (2.2), (2.4), (2.7
Isomorphism Problems for the Baire Function Spaces of Topological Spaces
Let a compact Hausdorff space X contain a non-empty perfect
subset. If α < β and β is a countable ordinal, then the Banach space
Bα (X) of all bounded real-valued functions of Baire class α on X is a proper
subspace of the Banach space Bβ (X). In this paper it is shown that:
1. Bα (X) has a representation as C(bα X), where bα X is a compactification
of the space P X – the underlying set of X in the Baire topology
generated by the Gδ -sets in X.
2. If 1 ≤ α < β ≤ Ω, where Ω is the first uncountable ordinal number,
then Bα (X) is uncomplemented as a closed subspace of Bβ (X).
These assertions for X = [0, 1] were proved by W. G. Bade [4] and in
the case when X contains an uncountable compact metrizable space – by
F.K.Dashiell [9]. Our argumentation is one non-metrizable modification of
both Bade’s and Dashiell’s methods
Functionally Countable Spaces and Baire Functions
The concept of the distinguished sets is applied to the investigation
of the functionally countable spaces. It is proved that every Baire
function on a functionally countable space has a countable image. This is a
positive answer to a question of R. Levy and W. D. Rice
Feather-Processing Wastewater: Composition, Infl uence on the Natural Water Objects and Decontamination Technologies
Poultry farming and production is one of very important branches of the food and food processing industry, which produces important foodstuffs, semi-fi nished products and by-products for further processing. Intense processing of the poultry products results in a massive formation of the heavily polluted wastewaters containing many hazardous pollutants. This problem is very acute for many countries where this branch is quick-growing and being under extended investigation of various decontamination methods of the poultry processing wastewaters. Poultry feather is not involved in any food processing industry but can be used as an adsorbent or fi ller for some clothes and bed clothes. Relevant industrial
feather-processing stages also produce some contaminated wastewaters and a problem of their decontamination is still beyond systematic analysis and investigation. This paper deals with analysis of the poultry feather-processing wastewaters composition and experimental investigation of various methods and technologies of their decontamination. Iron chloride combined with polyacrylamide ensured the best wastewater cleaning/fl occulation activity and a combined wastewater treatment scheme with primary cleaning/fl occulation, secondary complex biotreatment and tertiary sand-fi ltration has been proposed in order to reach a required decontamination depth. This technology proves the wastewater quality, which complies with the offi cially set limits
Impacto das IAS/IFRS nas contas dos bancos do sistema bancário português
Dissertação de mest., Contabilidade, Faculdade de Economia, Universidade do Algarve, 2008A partir de 1 de Janeiro de 2005 as instituições financeiras com valores
mobiliários admitidos à cotação em mercados regulamentados da União Europeia
adoptaram as normas internacionais de contabilidade na elaboração das suas
demonstrações financeiras, em base consolidada.
Neste trabalho, efectuou-se a análise do impacto quantitativo e qualitativo da
primeira adopção das normas do IASB pelas instituições financeiras portuguesas.
Pretendeu-se identificar os assuntos e as rubricas das demonstrações financeiras
com maior impacto no capital próprio e resultado líquido em resultado da conversão
para as normas do IASB, bem como analisar o impacto das novas regras contabilísticas
nos principais indicadores de performance.
Utilizou-se a técnica de análise comparativa de conteúdo aplicada às
demonstrações financeiras dos bancos com apresentação descritiva de dados e análise
de clusters.
Os resultados evidenciaram que a área de pensões de reforma e outros benefícios
dos empregados, instrumentos financeiros, “goodwill”, consolidação de “special
purpose entities”, activos intangíveis e impostos diferidos são os assuntos e as rubricas
das demonstrações financeiras com maior impacto no capital próprio e resultado
líquido. O impacto da adopção das IFRS reflectiu-se na diminuição dos capitais
próprios e resultados líquidos na maioria das instituições financeiras.
Foi possível confirmar, através de análise de clusters, não só diferente
segmentação dos bancos, correspondente às alterações ocorridas nos indicadores de
performance, em resultado da adopção das IFRS, como também identificar o indicador
rendibilidade de capital próprio com maiores alterações ao nível de todas as instituições
financeiras
The visual skills of the adult reading disabled
Almost a third of this nation\u27s adult population is estimated to be functionally illiterate. The cost to this nation is enormous. In economic terms, billions of dollars are spent to address merely the symptoms of adult illiteracy. The cost to this nation in the loss of contributions to the advancement of society and the loss of human dignity is incalculable. Despite the magnitude and importance of this problem, there are no published reports on the visual skills of this very large population. We performed vision screening on 15 adults who were enrolled in a rehabilitative reading program. We discovered that a significant percentage of these people exhibited uncorrected refractive error, presbyopia, eye movement dysfunction, and accommodative and vergence anomalies sufficient to impede the attainment of reading proficiency in 80% of the adults surveyed
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