373 research outputs found
Effect of the and channels and interference phenomena in the two-pion and transitions of charmonia and bottomonia
It is shown that the basic shape of dipion and mass spectra
in decays , ,
and in the two-pion transitions of bottomonia states
are explained by an unified mechanism based on the contribution of the
, and coupled channels including their
interference. The role of the individual resonances in making up the
shape of the dipion mass distributions in the charmonia and bottomonia decays
is considered.Comment: 13 pages, 9 figure
Unified description of BaBar and Belle data on the bottomonia decays Upsilon(mS) -> Upsilon(nS) pi+ pi-
We present a unified analysis of the decays of bottomonia Upsilon(mS) ->
Upsilon(nS) pi pi (m>n, m=2,3,4,5, n=1,2,3), charmonia J/psi -> phi (pi pi, K
antiK), psi(2S) -> J/psi pi pi and the isoscalar S-wave processes pi pi -> pi
pi, K antiK, eta eta. In this analysis we extend our recent study of low-lying
(m=2,3) radial excitations of bottomonia to modes involving higher (m=4,5)
excited states. Similarly as for the data on lower radial excitations, we
confirm that the data for higher radially excited states from the BaBar and
Belle collaborations can be described under conditions that the final
bottomonium is a spectator and the multichannel pi pi scattering is considered
in a model-independent approach based on analyticity, unitarity and the
uniformization procedure. Indeed we show that the dipion mass distributions in
the two-pion transitions of both charmonia and bottomonia states are explained
by a unified mechanism based on the contribution of the pi pi and K antiK
coupled channels including their interference (final-state interactions).
Therefore, our main result is that the lower and higher radially excited states
of charmonia and bottomonia have no specific features in mutual comparison and
can be understood in a unified picture, e.g. proposed by our approach.Comment: 8 page
Harmonizace klinického obsahu elektronického zdravotního záznamu
Název: Harmonizace klinického obsahu elektronického zdravotního záznamu Autor: Mgr. Miroslav Nagy Pracoviště: Oddělení medicínské informatiky, Ústav informatiky v.v.i., Akademie věd České Republiky Školitel: RNDr. Antonín Říha, CSc. E-mail školitele: [email protected] Tato disertační práce se zabývá možnostmi harmonizace klinického obsahu v elek- tronickém zdravotním záznamu (EZZ). První část mapuje současný stav výzkumu v oblasti EZZ a příbuzných oborů, nástroje podporované nejnovějšími softwarovými tech- nologiemi a aktuální výsledky výzkumu na poli biomedicínské informatiky. Dále následuje analýza překážek zabraňujících sdílení medicínských dat a návrhy jejich řešení. Práce shrnuje veškeré nástroje, modelovací přístupy, standardy a kódovací systémy použité během výzkumu. Další část práce se zabývá metodami aplikovanými v procesu harmo- nizace klinických modelů a popisuje výsledky v podobě mapování klinických konceptů, podpůrných nástrojů, vyvinutých systémů EZZ a platforem pro sémantickou interop- erabilitu. Závěr práce nabízí celkové shrnutí výsledků výzkumu a jejich diskusi, stejně jako výhled do budoucnosti. Klíčová slova: elektronický zdravotní záznam, sémantická...Title: Clinical Content Harmonisation of Electronic Health Record Author: Mgr. Miroslav Nagy Department: Department of Medical Informatics, Institute of Computer Science v.v.i., Academy of Sciences of the Czech Republic Supervisor: RNDr. Antonín Říha, CSc. Supervisor's e-mail: [email protected] This PhD thesis deals with the possibilities of clinical content harmonisation in elec- tronic health records (EHR). In the first sections, the current state of the art in the field of EHR and other related fields is summarised, as well as that of the tools supported by current software technologies and the results of research in the field of medical in- formatics. The work is focused on analysis of obstacles in sharing medical data and on proposals of steps for overcoming these obstacles. Next, the utilized tools, modelling approaches, standards and coding systems used during the research are summed up. In the following sections the methods pointing to achieving harmonized clinical models are elaborated on and resulting clinical concepts mappings, supporting tools, developed EHR systems and semantic interoperability platforms are presented. In the conclusion these results are discussed and some future work is proposed. Keywords: electronic health record, semantic interoperability, clinical content, har-...First Faculty of Medicine1. lékařská fakult
Review of Ronnie Littlejohn, Jeffrey Dippmann (eds). Riding the Wind with Liezi: New Perspectives on the Daoist Classic
The effect of isoscalar S-wave multichannel pi pi -> pi pi, K antiK, eta eta scattering is considered in the analysis of decay data of the Upsilon-mesons. We show that when allowing for the final state interaction contribution to the decays Upsilon(mS) -> Upsilon(nS) pi pi (m>n, m=2,3, n=1,2) in our model-independent approach, we can explain the two-pion energetic spectra of these Upsilon transitions including the two-humped shape of the di-pion mass distribution in Upsilon(3S) -> Upsilon(1S) pi pi as the coupled-channel effect. It is shown also that the considered bottomia decay data do not offer new insights into the nature of the f0 mesons, which were not already deduced in our previous analyses of pseudoscalar meson scattering data.The effect of isoscalar S-wave multichannel ππ→ππ,KK¯,ηη scattering is considered in the analysis of decay data of the ϒ-mesons. We show that when allowing for the final state interaction contribution to the decays ϒ(mS)→ϒ(nS)ππ (m>n,m=2,3,n=1,2) in our model-independent approach, we can explain the two-pion energetic spectra of these ϒ transitions including the two-humped shape of the di-pion mass distribution in ϒ(3S)→ϒ(1S)ππ as the coupled-channel effect. It is shown also that the considered bottomia decay data do not offer new insights into the nature of the f0 mesons, which were not already deduced in our previous analyses of pseudoscalar meson scattering data.</p
The scalar mesons in multi-channel scattering and decays of the and families
The mesons are studied in a combined analysis of data on the isoscalar
S-wave processes and on decays
, , and
from the Argus, Crystal Ball, CLEO, CUSB,
DM2, Mark II, Mark III, and BES II collaborations. The method of analysis,
based on analyticity and unitarity and using an uniformization procedure, is
set forth with some details. Some spectroscopic implications from results of
the analysis are discussed.Comment: Lecture read by Yu. Surovtsev at the Helmholtz International Summer
School "Physics of Heavy Quarks and Hadrons - 2013", July 2013, Dubna, Russi
Parameters of scalar resonances from the combined analysis of data on processes and decays
A combined analysis of data on isoscalar S-wave processes
and on decays
from the DM2, Mark III and BESIII
collaborations is performed to study mesons. The method of analysis is
based on analyticity and unitarity and uses an uniformization procedure. In the
analysis limited only to the multi-channel -scattering data, two
possible sets of parameters of the were found: in both cases the
mass was about 700 MeV but the total width was either about 600 or 930 MeV. The
extension of the analysis using only the DM2 and Mark III data on the
decays does not allow to choose between these sets. However, the data from
BESIII on the di-pion mass distribution in the decay
clearly prefers the wider state. Spectroscopic implications from
results of the analysis are also discussed.Comment: the formalism is also described (text overlap) in arXiv:1108.3725;
new extended analysis of data; revised PRD versio
Shaping Sustainable Urban Environments by Addressing the Hydro-Meteorological Factors in Landslide Occurrence: Ciuperca Hill (Oradea, Romania)
Romania is one of the countries severely affected by numerous natural hazards, where landslides constitute a very common geomorphic hazard with strong economic and social impacts. The analyzed area, known as the "Ciuperca Hill", is located in Oradea (NW part of Romania) and it has experienced a number of landsliding events in previous years, which have endangered anthropogenic systems. Our investigation, focused on the main causal factors, determined that landslide events have rather complex components, reflected in the joint climatological characteristics, properties of the geological substrate, and human activity that further contributed to the intensive change of landscape and acceleration of slope instability. Analysis of daily precipitation displays the occurrence and intensive distribution between May and September. Higher values of rainfall erosivity (observed for the 2014-2017 period), are occurring between April and August. Erosivity density follows this pattern and indicates high intensity events from April until October. SPI index reveals the greater presence of various wet classes during the investigated period. Geological substrate has been found to be highly susceptible to erosion and landsliding when climatological conditions are suitable. Accelerated urbanization and reduced vegetation cover intensified slope instability. The authors implemented adequate remote-sensing techniques in order to monitor and assess the temporal changes in landslide events at local level. Potential solutions for preventative actions are given in order to introduce and conduct qualitative mitigation strategies for shaping sustainable urban environments. Results from this study could have implications for mitigation strategies at national, regional, county, and municipality levels, providing knowledge for the enhancement of geohazard prevention and appropriate response plans
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