Search results for "Pb"
showing 10 items of 3522 documents
PBO textile embedded in FRCM for confinement of r.c. columns
2014
Results of experimental tests on two reinforced concrete columns confined with PBO-FRCM jacketing subject to axial load and bending moments are presented, showing the effectiveness of the confinement system. Comparison of test results against theoretical results derived by a fiber model stress the ability of the confinement system to enhance both strength and deformation capacity of the confined concrete
Freeze-out radii extracted from three-pion cumulants in pp, p–Pb and Pb–Pb collisions at the LHC
2014
In high-energy collisions, the spatio-temporal size of the particle production region can be measured using the Bose-Einstein correlations of identical bosons at low relative momentum. The source radii are typically extracted using two-pion correlations, and characterize the system at the last stage of interaction, called kinetic freeze-out. In low-multiplicity collisions, unlike in high-multiplicity collisions, two-pion correlations are substantially altered by background correlations, e.g. mini-jets. Such correlations can be suppressed using three-pion cumulant correlations. We present the first measurements of the size of the system at freeze-out extracted from three-pion cumulant correl…
Two-pion femtoscopy in p-Pb collisions at √sNN = 5.02 TeV
2015
We report the results of the femtoscopic analysis of pairs of identical pions measured in p-Pb collisions at √sNN = 5.02 TeV. Femtoscopic radii are determined as a function of event multiplicity and pair momentum in three spatial dimensions. As in the pp collision system, the analysis is complicated by the presence of sizable background correlation structures in addition to the femtoscopic signal. The radii increase with event multiplicity and decrease with pair transverse momentum. When taken at comparable multiplicity, the radii measured in p-Pb collisions, at high multiplicity and low pair transverse momentum, are 10%–20% higher than those observed in pp collisions but below those observ…
Shape coexistence in the neutron-deficient even-even Hg182-188 isotopes studied via Coulomb excitation
2014
Coulomb-excitation experiments to study electromagnetic properties of radioactive even-even Hg isotopes were performed with 2.85 MeV/nucleon mercury beams from REX-ISOLDE. Magnitudes and relative signs of the reduced E2 matrix elements that couple the ground state and low-lying excited states in Hg182-188 were extracted. Information on the deformation of the ground and the first excited 0+ states was deduced using the quadrupole sum rules approach. Results show that the ground state is slightly deformed and of oblate nature, while a larger deformation for the excited 0+ state was noted in Hg182,184. The results are compared to beyond mean field and interacting-boson based models and interp…
Dydaktyczne postulaty Ludwiki Jeleńskiej (1885-1961) w świetle założeń współczesnej pedagogiki integralnej
2020
Głównym celem artykułu jest wykazanie obecności współczesnych założeń pedagogiki integralnej w postulatach dydaktycznych Ludwiki Jeleńskiej (1885-1961). Rozważania wpisują się w historyczne badania pedagogiczne, w których zastosowana jest metoda analizy i krytyki źródeł. W pierwszym punkcie dokonana jest operacjonalizacja pojęcia „pedagogika integralna”. Drugi punkt zawiera prezentację obecności myśli dydaktycznej L. Jeleńskiej we współczesnej literaturze pedagogicznej. W trzecim punkcie zrelacjonowane są wyniki analizy dydaktyki L. Jeleńskiej w perspektywie dzisiejszych założeń pedagogiki integralnej. Analizy te uprawniają do stwierdzenia, że pomimo licznych uwarunkowań społeczno-kulturowy…
Apbūves tiesība.
2017
Latvijas Civillikums nosaka zemes un ēkas vienotības principu. Tomēr dažādu faktoru ietekmē likumdevējs Latvijā ir pieļāvis dalīto īpašums, ko šobrīd likumdevējs mēģija izskaust, veicot grozījumus likumos un normatīvajos aktos. Latvijā ar 2017.gada 1.janvāri tiek nodibināts jauns tiesību institūts- apbūves tiesība. Tiesība ir kā alternatīva līdzšenējamam regulējumam būvēt uz svešas zemes, neradot dalīto īpašumu. Apbūves tiesība ir tiesība ir ar līgumu piešķirta mantojama un atsavināma lietu tiesība celt un lietot uz sveša zemes gabala nedzīvojamu ēku vai inženierbūvi kā patstāvīgu īpašuma objektu. Darba uzdevums ir izvērtēt apbūves tiesības institūtu kopsakarā ar Vāciju, Šveici un Igauniju …
Influence of Wind on Suspended Matter in the Water of the Albufera of Valencia (Spain)
2021
Wind is one of the factors that has a great influence on suspended matter in lakes, especially in shallow lagoons. In order to know how wind affects the water in Albufera of Valencia, a shallow coastal lagoon, the measured variables of turbidity and transparency have been correlated with the estimates by processing Sentinel-2 satellite images with the Sen2Cor processor. Data from four years of study show that most of them are light to gentle easterly breezes and moderate to fresh westerly breezes. The results obtained show significant correlations between the measured variables and those obtained from the satellite images for total suspended matter and water transparency and with the averag…
Influencia de la cultura en el comportamiento de compra online de productos turísticos. El caso de España y México
2014
Conocer cómo se comporta el consumidor en los entornos virtuales es fundamental para potenciar el desarrollo e implantación de decisiones estratégicas de marketing que sean eficaces en la comercialización de bienes y servicios en Internet. El presente trabajo tiene como objetivo conocer la importancia de la cultura en el comportamiento de compra online del individuo, analizando para ello dos países latinos: México y España. De este modo, partiendo de la Teoría de Comportamiento Planificado, se estudia el efecto de la actitud, de la norma subjetiva y del control percibido, sobre el comportamiento de reserva/compra online de alojamiento turístico, comparando la importancia adquirida en cada p…
Centrality dependence of particle production in p−Pb collisions at √sNN = 5.02 TeV
2015
We report measurements of the primary charged-particle pseudorapidity density and transverse momentum distributions in p-Pb collisions at √sNN = 5.02 TeV and investigate their correlation with experimental observables sensitive to the centrality of the collision. Centrality classes are defined by using different event-activity estimators, i.e., charged-particle multiplicities measured in three different pseudorapidity regions as well as the energy measured at beam rapidity (zero degree). The procedures to determine the centrality, quantified by the number of participants (Npart) or the number of nucleon-nucleon binary collisions (Ncoll) are described. We show that, in contrast to Pb-Pb coll…
The Proton-Boron Reaction Increases the Radiobiological Effectiveness of Clinical Low- and High-Energy Proton Beams: Novel Experimental Evidence and …
2021
Protontherapy is a rapidly expanding radiotherapy modality where accelerated proton beams are used to precisely deliver the dose to the tumor target but is generally considered ineffective against radioresistant tumors. Proton-Boron Capture Therapy (PBCT) is a novel approach aimed at enhancing proton biological effectiveness. PBCT exploits a nuclear fusion reaction between low-energy protons and 11B atoms, i.e. p+11B→ 3α (p-B), which is supposed to produce highly-DNA damaging α-particles exclusively across the tumor-conformed Spread-Out Bragg Peak (SOBP), without harming healthy tissues in the beam entrance channel. To confirm previous work on PBCT, here we report new in-vitro data obtained…