523 research outputs found
Cultural Heritage and Climate Change: New challenges and perspectives for research
JPI Cultural Heritage & JPI ClimateCollaboration between the two Joint Programming Initiatives âCultural Heritage and Global Changeâ
(JPI CH), and âConnecting Climate Knowledge for Europeâ (JPI Climate) began in 2019 and led to the
organisation of a joint workshop a year later. Following the recommendations in the workshop report,
an expert working group was set up to scope research gaps and opportunities at the interface of cultural
heritage and climate change, culminating in the publication of this White Paper. This strategic document
is expected to support the two JPIs to generate policy-relevant research outcomes.Peer reviewe
Multidifferential study of identified charged hadron distributions in -tagged jets in proton-proton collisions at 13 TeV
Jet fragmentation functions are measured for the first time in proton-proton
collisions for charged pions, kaons, and protons within jets recoiling against
a boson. The charged-hadron distributions are studied longitudinally and
transversely to the jet direction for jets with transverse momentum 20 GeV and in the pseudorapidity range . The
data sample was collected with the LHCb experiment at a center-of-mass energy
of 13 TeV, corresponding to an integrated luminosity of 1.64 fb. Triple
differential distributions as a function of the hadron longitudinal momentum
fraction, hadron transverse momentum, and jet transverse momentum are also
measured for the first time. This helps constrain transverse-momentum-dependent
fragmentation functions. Differences in the shapes and magnitudes of the
measured distributions for the different hadron species provide insights into
the hadronization process for jets predominantly initiated by light quarks.Comment: All figures and tables, along with machine-readable versions and any
supplementary material and additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-013.html (LHCb
public pages
Study of the decay
The decay is studied
in proton-proton collisions at a center-of-mass energy of TeV
using data corresponding to an integrated luminosity of 5
collected by the LHCb experiment. In the system, the
state observed at the BaBar and Belle experiments is
resolved into two narrower states, and ,
whose masses and widths are measured to be where the first uncertainties are statistical and the second
systematic. The results are consistent with a previous LHCb measurement using a
prompt sample. Evidence of a new
state is found with a local significance of , whose mass and width
are measured to be and , respectively. In addition, evidence of a new decay mode
is found with a significance of
. The relative branching fraction of with respect to the
decay is measured to be , where the first
uncertainty is statistical, the second systematic and the third originates from
the branching fractions of charm hadron decays.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-028.html (LHCb
public pages
Measurement of the ratios of branching fractions and
The ratios of branching fractions
and are measured, assuming isospin symmetry, using a
sample of proton-proton collision data corresponding to 3.0 fb of
integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The
tau lepton is identified in the decay mode
. The measured values are
and
, where the first uncertainty is
statistical and the second is systematic. The correlation between these
measurements is . Results are consistent with the current average
of these quantities and are at a combined 1.9 standard deviations from the
predictions based on lepton flavor universality in the Standard Model.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-039.html (LHCb
public pages
La pierre et le verre des bùtiments face à la pollution atmosphérique
LefÚvre Roger-Alexandre. La pierre et le verre des bùtiments face à la pollution atmosphérique. In: Les Annales de la recherche urbaine, N°73, 1996. Ville et santé publique. pp. 130-133
Weathering of materials at Notre-Dame from changes in air pollution and climate in Paris, 1325â2090
International audienc
Modelling the Alteration of Medieval Stained Glass as a Function of Climate and Pollution: Comparison between Different Methodologies
International audienceMost stained-glass windows installed during the Middle Ages have deteriorated over time due to climate and pollution. To reconstruct their alteration history over the centuries, evaluate the current environmental risk, and predict their alteration in the future, two modelling methodologies have been used. First, based on the short-term exposure of medieval-type glass in different sites, doseâresponse functions (DRFs) were established. These DRFs correlate relevant environmental factors (temperature, rain quantity, rain pH, relative humidity, and SO2 concentration) with the response of the material in terms of alteration layer thickness. The second methodology consists of laboratory experiments that aim at parametrising kinetic laws as a function of specific parameters (temperature, rain pH, and relative humidity). These kinetic laws can be extrapolated over long periods, contrary to DRFs. In this study, we compared both methodologies to simulate the alteration of a model stained glass at different European sites or over different time periods. The results highlighted that the kinetic laws were able to closely represent the data, except for the polluted sites where the alteration was underestimated. This indicated that the dependence of the alteration rate on the pollutant concentrations should be included to improve the model
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The Future of Our Pasts
On July 3rd, 2019, the Climate Change and Heritage Working Group of ICOMOS delivered a new report on the critical importance of heritage issues to international climate change policy, to the States Parties of the World Heritage Committee. Titled The Future of Our Pasts: Engaging Cultural Heritage in Climate Action, the report was co-published by ICOMOS and the Center for Heritage and Society with funding by the Worldwide Universities Network (WUN).The Climate Change and Heritage Working Groupâs (CCHWG) brief is to (more on the Working Groupâs brief can be accessed here:(1) Develop and coordinate ICOMOS inputs into the update of the 2007 World Heritage Committee âPolicy Document on the Impacts of Climate Change on World Heritage Properties.â This will include soliciting and collecting inputs from various ICOMOS constituencies including National Committee and International Scientific Committees, synthesizing those inputs and offering them in a timely and helpful matter to the joint UNESCO-ICCROM-IUCN-ICOMOS Policy update process.(2) Develop a draft global climate change organizational engagement program for ICOMOS (the âRoadmapâ). The ICOMOS Roadmap would suggest a framework for comprehensive engagement by ICOMOS members on climate change including suggested activities and areas of engagement and responsibility for various ICOMOS International Scientific Committees, National Committees, specialized bodies and the Secretariat.(3) Coordinating the drafting of a new ICOMOS Charter on Climate Change and Heritage. A charter is ICOMOSâs most formal type of international doctrinal document, addressing heritage and conservation as a discipline. The consideration and adoption of charters is governed by specific procedures set out in the ICOMOS Rules of Procedure. The pursuit of Charter as a capstone to the Working Group efforts is advisable both because the outcome will provide authoritative guidance on best practices for the managing of heritage in the face of climate change but also because the inclusive process is required for charter consideration is perhaps the most comprehensive way to engage ICOMOS members on a topic. The charter is expected to be a map to the Policy Document but will include all types of cultural heritage (not just World Heritage) and may extend to areas that the WHC chooses not to include in its Policy for political or other reasons. Target completion draft: October 2019 (final draft submission at ICOMOS annual general meeting; Rabat, Morocco); October 2020: adoption at the 20th ICOMOS General Assembly (Sydney, Australia)
Ăvaluation des interventions de santĂ© mondiale
Une couverture universelle des soins de santĂ© en 2030 pour tous les ĂȘtres humains, du Nord au Sud ? RĂ©aliser cet objectif de dĂ©veloppement durable aussi ambitieux que nĂ©cessaire exigera une exceptionnelle volontĂ© politique, mais aussi de solides donnĂ©es probantes sur les moyens dây arriver, notamment sur les interventions de santĂ© mondiale les plus efficaces. Savoir les Ă©valuer est donc un enjeu majeur. On ne peut plus se contenter de mesurer leur efficacitĂ© : il nous faut comprendre pourquoi elles lâont Ă©tĂ© (ou pas), comment et dans quelles conditions. Cet ouvrage collectif rĂ©unissant 27 auteurs et 12 autrices de diffĂ©rents pays et de disciplines variĂ©es a pour but de prĂ©senter de maniĂšre claire et accessible, en français, un florilĂšge dâapproches et de mĂ©thodes avancĂ©es en Ă©valuation dâinterventions : quantitatives, qualitatives, mixtes, permettant dâĂ©tudier lâĂ©valuabilitĂ©, la pĂ©rennitĂ©, les processus, la fidĂ©litĂ©, lâefficience, lâĂ©quitĂ© et lâefficacitĂ© dâinterventions complexes. Chaque mĂ©thode est prĂ©sentĂ©e dans un chapitre Ă travers un cas rĂ©el pour faciliter la transmission de ces savoirs prĂ©cieux
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