9,013 research outputs found
Role of electrode materials for the anodic oxidation of a real landfill leachate – Comparison between Ti–Ru–Sn ternary oxide, PbO2 and boron-doped diamond anode
No full textIn this paper the electrocatalytic properties of Ti–Ru–Sn ternary oxide (TiRuSnO2), PbO2and boron-doped
diamond (BDD) anodes have been compared for the electrochemical oxidation of a real landfill leachate
from an old municipal solid waste landfill (average values of COD 780 mg dm
3
and NH
þ
4-N 266
mg dm
3
). The experiments have been performed using an undivided flow cell equipped with a stainless
steel cathode, under constant current of 2 A and flow-rate of 420 dm
3
h
1
. The performance of the electrodes has been compared measuring the time evolution of aromatic compounds, COD, ammonium, colour
removal, current efficiency and energy consumption. The experimental results indicated that after 8 h of
electrolyses TiRuSnO2anode yields only 35% COD, 52% colour and 65% ammonium removal. Using PbO2
ammonium and colour were completely removed but a residual COD (i.e. 115 mg dm
3
) was present.
On the contrary BDD enables complete COD, colour and ammonium removal due to the electrogeneration of hydroxyl radicals from water discharge and active chlorine from chloride ions oxidation. BDD also
exhibits greater current efficiency along with a significantly lower energy cost than other electrodes. These
results indicated that the electrochemical oxidation with BDD anode is an effective process for the treatment of landfill leachate
Spectacle vivant et internet : Exister en ligne pour accroître la fréquentation en salle.
No full textInternational audienceInternet as an opportunity to help performing arts’ theaters to construct their publics is questioned here. The analysis of 12 individual interviews, realized with theaters’ managers, and the observation of 113 theaters’ websites highlight the requirement to develop this tool. Websites appeared under-used by theaters whereas the increased importance of websites to communicate with their publics is recognized by managers. Few recommendations to better use this tool are also mentioned.Spectacle vivant et internet exister en ligne pour accroître la fréquentation en salle Florence eUZÉBY et carole MartIneZ Résumé Abstract Dans le contexte difficile du spectacle vivant, les auteurs s'interrogent sur l'opportunité que représente internet pour aider les salles de spectacle à accroître la fréquentation des publics. L'analyse de 12 entretiens individuels réalisés au-près de managers de salles de spectacle ainsi que l'obser-vation de 113 sites internet mettent en évidence la nécessité d'investir cet outil. Aujourd'hui sous-utilisé par ces salles, les managers interrogés s'accordent à reconnaitre le poids croissant de cet outil pour communiquer avec leurs publics. L'article ouvre la voie à un certain nombre de recommanda-tions pour mieux utiliser celui-ci
Spectacle vivant et internet : Exister en ligne pour accroître la fréquentation en salle.
No full textInternational audienceInternet as an opportunity to help performing arts’ theaters to construct their publics is questioned here. The analysis of 12 individual interviews, realized with theaters’ managers, and the observation of 113 theaters’ websites highlight the requirement to develop this tool. Websites appeared under-used by theaters whereas the increased importance of websites to communicate with their publics is recognized by managers. Few recommendations to better use this tool are also mentioned.Spectacle vivant et internet exister en ligne pour accroître la fréquentation en salle Florence eUZÉBY et carole MartIneZ Résumé Abstract Dans le contexte difficile du spectacle vivant, les auteurs s'interrogent sur l'opportunité que représente internet pour aider les salles de spectacle à accroître la fréquentation des publics. L'analyse de 12 entretiens individuels réalisés au-près de managers de salles de spectacle ainsi que l'obser-vation de 113 sites internet mettent en évidence la nécessité d'investir cet outil. Aujourd'hui sous-utilisé par ces salles, les managers interrogés s'accordent à reconnaitre le poids croissant de cet outil pour communiquer avec leurs publics. L'article ouvre la voie à un certain nombre de recommanda-tions pour mieux utiliser celui-ci
Patient Perceptions Regarding the Likelihood of Cure After Surgical Resection of Lung and Colorectal Cancer
No full textBACKGROUND: The objective of the current study was to characterize the prevalence of the expectation that surgical resection of lung or colorectal cancer might be curative. The authors sought to assess patient-level, tumor-level, and communication-level factors associated with the perception of cure. METHODS: Between 2003 and 2005, a total of 3954 patients who underwent cancer-directed surgery for lung (30.3%) or colorectal (69.7%) cancer were identified from a population-based and health system-based survey of participants from multiple US regions. RESULTS: Approximately 80.0% of patients with lung cancer and 89.7% of those with colorectal cancer responded that surgery would cure their cancer. Even 57.4% and 79.8% of patients with stage IV lung and colorectal cancer, respectively, believed surgery was likely to be curative. On multivariable analyses, the odds ratio (OR) of the perception of curative intent was found to be higher among patients with colorectal versus lung cancer (OR, 2.27). Patients who were female, with an advanced tumor stage, unmarried, and having a higher number of comorbidities were less likely to believe that surgery would cure their cancer; educational level, physical function, and insurance status were not found to be associated with perception of cure. Patients who reported optimal physician communication scores (reference score, 0-80; score of 80-100 [OR, 1.40] and score of 100 [OR, 1.89]) and a shared role in decision-making with their physician (OR, 1.16) or family (OR, 1.17) had a higher odds of perceiving surgery would be curative, whereas patients who reported physician-controlled (OR, 0.56) or family-controlled (OR, 0.72) decision-making were less likely to believe surgery would provide a cure. CONCLUSIONS: Greater focus on patient-physician engagement, communication, and barriers to discussing goals of care with patients who are diagnosed with cancer is needed. (c) 2015 American Cancer Society
Entanglement and quantity in quantum space - About quantum measurement (II)
No full textAs a continuation and extension of "quantity in phase space" "quantity in quantum space" is introduced. With that, the disappearing of quantum interference discussed in a previous paper [S. Durr, et al., Nature 395 (1998) 33] is explained in the same spirit as our recent papers [Ren De-Ming, Commun. Theor. Phys. (Beijing, China) 41 (2004) 685, 833].Physics, MultidisciplinarySCI(E)中国科学引文数据库(CSCD)1ARTICLE133-364
Semiautomatic estimation of breast density with DM-Scan software
No full text[EN] Objective
To evaluate the reproducibility of the calculation of breast density with DM-Scan software, which is based on the semiautomatic segmentation of fibroglandular tissue, and to compare it with the reproducibility of estimation by visual inspection.
Material and methods
The study included 655 direct digital mammograms acquired using craniocaudal projections. Three experienced radiologists analyzed the density of the mammograms using DM-Scan, and the inter- and intra-observer agreement between pairs of radiologists for the Boyd and BI-RADS® scales were calculated using the intraclass correlation coefficient. The Kappa index was used to compare the inter- and intra-observer agreements with those obtained previously for visual inspection in the same set of images.
Results
For visual inspection, the mean interobserver agreement was 0,876 (95% CI: 0,873-0,879) on the Boyd scale and 0,823 (95% CI: 0,818-0,829) on the BI-RADS® scale. The mean intraobserver agreement was 0,813 (95% CI: 0,796-0,829) on the Boyd scale and 0,770 (95% CI: 0,742-0,797) on the BI-RADS® scale. For DM-Scan, the mean inter- and intra-observer agreement was 0,92, considerably higher than the agreement for visual inspection.
Conclusion
The semiautomatic calculation of breast density using DM-Scan software is more reliable and reproducible than visual estimation and reduces the subjectivity and variability in determining breast density.[ES] Objetivo
Evaluar la reproducibilidad del cálculo de la densidad mamaria con la aplicación informática DM-Scan, basada en la segmentación semiautomática del tejido fibroglandular, y compararla con la de la inspección visual.
Material y métodos
El estudio incluyó 655 mamografías digitales directas en proyección cráneo-caudal. Tres expertos radiólogos analizaron la densidad de las mamografías con DM-Scan, y se calcularon las concordancias inter e intraobservador entre pares de radiólogos para las escalas Boyd y BI-RADS®, utilizando el índice de correlación intraclase. Las concordancias se compararon con las obtenidas previamente para la inspección visual, en el mismo conjunto de imágenes, utilizando el índice Kappa.
Resultados
Con el análisis visual, la concordancia media interobservador fue de 0,876 (IC 95%: 0,873-0,879) para la escala de Boyd, y 0,823 (IC 95%: 0,818-0,829) para la clasificación BI-RADS®. La concordancia intraobservador fue de 0,813 (IC 95%: 0,796-0,829) para la escala de Boyd, y 0,770 (IC 95%: 0,742-0,797) para la clasificación BI-RADS®. Con DM-Scan, la concordancia media inter e intraobservador fue de 0,92, notablemente superior a las concordancias de la clasificación visual.
Conclusión
El cálculo de la densidad mamaria con la aplicación semiautomática DM-Scan es más fiable y reproducible, y disminuye la subjetividad y variabilidad de la estimación visual.Martinez Gomez, I.; Casals El Busto, M.; Antón Guirao, J.; Ruiz Perales, F.; Llobet Azpitarte, R. (2014). Estimación semiautomática de la densidad mamaria con DM-Scan. Radiología. 56(5):429-434. https://doi.org/10.1016/j.rx.2012.11.007S42943456
Sneutrino DM in the NMSSM with inverse seesaw mechanism
No full textIn supersymmetric theories like the Next-to-Minimal Supersymmetric Standard Model (NMSSM), the lightest neutralino with bino or singlino as its dominant component is customarily taken as dark matter (DM) candidate. Since light Higgsinos favored by naturalness can strength the couplings of the DM and thus enhance the DM-nucleon scattering rate, the tension between naturalness and DM direct detection results becomes more and more acute with the improved experimental sensitivity. In this work, we extend the NMSSM by inverse seesaw mechanism to generate neutrino mass, and show that in certain parameter space the lightest sneutrino may act as a viable DM candidate, i.e. it can annihilate by multi-channels to get correct relic density and meanwhile satisfy all experimental constraints. The most striking feature of the extension is that the DM-nucleon scattering rate can be naturally below its current experimental bounds regardless of the higgsino mass, and hence it alleviates the tension between naturalness and DM experiments. Other interesting features include that the Higgs phenomenology becomes much richer than that of the original NMSSM due to the relaxed constraints from DM physics and also due to the presence of extra neutrinos, and that the signatures of sparticles at colliders are quite different from those with neutralino as DM candidate.National Natural Science Foundation of China (NNSFC) [11575053]SCI(E)ARTICLE1
Classical mechanics and quantum mechanics
No full textThe Newton equation of motion is derived from quantum mechanics.Physics, MultidisciplinarySCI(E)中国科学引文数据库(CSCD)2ARTICLE5685-6884
Desarrollo de nanofluidos de carbono con aplicación en procesos industriales de transferencia de calor mediante estrategias de síntesis “eco-friendly”.
No full textde-los-Santos-Martinez. DM, Aguilar-Sánchez. T, Alcántara-Puerto. R, Navas-Pineda. J
Expanding the physics reach of DUNE in the near and far detectors
No full textThe Deep Underground Neutrino Experiment (DUNE) is a next-generation long-baseline neutrino oscillation experiment. Its primary goal is the determination of the neutrino mass hierarchy and the CP-violating phase. The DUNE physics programme also includes the detection of astrophysical neutrinos and the search for beyond the Standard Model (BSM) phenomena. DUNE will consist of a near detector (ND) complex placed at Fermilab, and a modular Liquid Argon Time Projection Chamber (LArTPC) far detector (FD) to be built in the Sanford Underground Research Facility (SURF), approximately 1300 km away from the neutrino production point.This thesis describes three different projects within DUNE. First, a novel strategy to improve the triggering capabilities of the DUNE FD is proposed. It uses matched filters to enhance the production of online hits across all charge collection planes. Next, the possibility of detecting neutrinos coming from dark matter (DM) annihilations in the Sun with the FD is explored. The complementarity of DUNE to this kind of DM searches is shown. Finally, the simulation and reconstruction framework of ND-GAr, the gas argon ND proposed for Phase II of DUNE, is presented. A number of additions to this are described, particularly focused on the development of the particle identification (PID) capabilities of the detector. These are then used to perform the first event selection studies with an end-to-end simulation in ND-GAr, in particular the selection of pion exclusive samples in CC interactions. All three of these projects share the common goal of enhancing the physics programme of DUNE
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