0000000000753958

AUTHOR

W. Li

showing 12 related works from this author

Design and analysis of discrete choice experiments for models with response time

2013

Settore SECS-S/02 - Statistica Per La Ricerca Sperimentale E TecnologicaA sector of conjoint analysis (experimental design in marketing research) is made of the so called choice experiments. In choice experiments respondents undergo a questionnaire which is nowadays mostly submitted through the internet. The questionnaire proposes to the respondent a sequence of choice sets each one including two or more profiles being a profile a specific combination of attribute levels. The respondent selects the preferred profile for each choice set. Responses given by a sample of respondents are analysed through suitable methods aimed to eventually find the best combination of attribute levels. One method of analysis adopts the Multinomial Logit (MLN) model. In this article the authors show the results of the MLN analysis compared with another model of analysis which uses an additional response which can be easily recorded by electronically submitted questionnaires. In practice modern survey platforms like “Qualtrics” (the one used for this work) can record the so called “response latency” i.e. the time taken by the respondent to make the choice and select the most preferred profile in the choice set. Thanks to a response latency model further refined in this work it is possible to deduce the relative weight of importance of the profiles for each choice set and respondent. This type of response can be used in place of the dichotomous choice variable in the MLN model. The two models and methods of analysis are deeply compared and it is critically discussed when it is better to use one or the other method. As a result a more reliable estimate of the optimal profile comes up implying lower risks for new investments and marketing decisions.
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Feasibility and physics potential of detecting $^8$B solar neutrinos at JUNO

2021

The Jiangmen Underground Neutrino Observatory (JUNO) features a 20 kt multi-purpose underground liquid scintillator sphere as its main detector. Some of JUNO's features make it an excellent location for 8B solar neutrino measurements, such as its low-energy threshold, high energy resolution compared with water Cherenkov detectors, and much larger target mass compared with previous liquid scintillator detectors. In this paper, we present a comprehensive assessment of JUNO's potential for detecting 8B solar neutrinos via the neutrino-electron elastic scattering process. A reduced 2 MeV threshold for the recoil electron energy is found to be achievable, assuming that the intrinsic radioactive …

Physics - Instrumentation and Detectorsneutrino: solarPhysics::Instrumentation and DetectorsSolar neutrinoscintillation counter: liquidhigh [energy resolution]01 natural sciences7. Clean energymass [target]High Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)JUNO; Neutrino oscillation; Solar neutrinoelastic scattering [neutrino electron]KamLAND[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]flavor [transformation]neutrino oscillationInstrumentationJiangmen Underground Neutrino ObservatoryPhysicsElastic scatteringJUNOliquid [scintillation counter]neutrino oscillation solar neutrino JUNOSettore FIS/01 - Fisica Sperimentaleoscillation [neutrino]Instrumentation and Detectors (physics.ins-det)Monte Carlo [numerical calculations]neutrino electron: elastic scatteringtensionmass difference [neutrino]ddc:nuclear reactor [antineutrino]observatoryHigh Energy Physics - PhenomenologyPhysics::Space Physicsneutrino: flavorsolar [neutrino]target: massNeutrinonumerical calculations: Monte CarloNuclear and High Energy PhysicsParticle physicsNeutrino oscillationmatter: solarCherenkov counter: waterneutrino: mass differenceFOS: Physical sciencesSolar neutrinoNOtransformation: flavoruraniumPE2_20103 physical scienceselectron: recoil: energyantineutrino: nuclear reactorsolar [matter]ddc:530ddc:610Sensitivity (control systems)[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]010306 general physicsNeutrino oscillationbackground: radioactivityCherenkov radiationAstrophysiquesolar neutrino010308 nuclear & particles physicswater [Cherenkov counter]radioactivity [background]flavor [neutrino]Astronomy and Astrophysicssensitivityneutrino: mixing anglerecoil: energy [electron]energy spectrum [electron]electron: energy spectrumHigh Energy Physics::Experimentsphereneutrino: oscillationenergy resolution: highEnergy (signal processing)mixing angle [neutrino]
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Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons

2017

High energy cosmic ray electrons plus positrons (CREs), which lose energy quickly during their propagation, provide an ideal probe of Galactic high-energy processes and may enable the observation of phenomena such as dark-matter particle annihilation or decay. The CRE spectrum has been directly measured up to $\sim 2$ TeV in previous balloon- or space-borne experiments, and indirectly up to $\sim 5$ TeV by ground-based Cherenkov $\gamma$-ray telescope arrays. Evidence for a spectral break in the TeV energy range has been provided by indirect measurements of H.E.S.S., although the results were qualified by sizeable systematic uncertainties. Here we report a direct measurement of CREs in the …

Astrophysics::High Energy Astrophysical PhenomenaDark matterFOS: Physical sciencesCosmic rayElectron01 natural sciencesdark matterHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)Positroncosmic rays0103 physical sciences010303 astronomy & astrophysicsCherenkov radiationHigh Energy Astrophysical Phenomena (astro-ph.HE)Physicscosmic rays dark matter electrons space experimentsMultidisciplinaryAnnihilation010308 nuclear & particles physicsSettore FIS/01 - Fisica SperimentaleSpectrum (functional analysis)electronsGalaxyHigh Energy Physics - PhenomenologyHigh Energy Physics::Experimentspace experimentsAstrophysics - High Energy Astrophysical Phenomena
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Measurement of the cosmic ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite

2019

DAMPE satellite has directly measured the cosmic ray proton spectrum from 40 GeV to 100 TeV and revealed a new feature at about 13.6 TeV.

dark matter cosmic rays spaceProtonMilky WayAstrophysics::High Energy Astrophysical PhenomenaDark matterFOS: Physical sciencesCosmic rayAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsKinetic energy01 natural sciences0103 physical sciences010306 general physicsNuclear ExperimentResearch ArticlesPhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Spectral indexMultidisciplinary010308 nuclear & particles physicsPhysicsHigh Energy Physics::PhenomenologySettore FIS/01 - Fisica SperimentaleSciAdv r-articlesPhysics::Accelerator PhysicsHigh Energy Physics::ExperimentAstrophysics - High Energy Astrophysical PhenomenaResearch Article
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Correction to: Potentially modifiable factors contributing to outcome from acute respiratory distress syndrome: the LUNG SAFE study (Intensive Care M…

2018

The members of the LUNG SAFE Investigators and the ESICM Trials Group were provided in such a way that they could not be indexed as collaborators on PubMed. The publisher apologizes for this error.

Critical Care and Intensive Care Medicine
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Worldwide comparison of ovarian cancer survival: Histological group and stage at diagnosis (CONCORD-2)

2016

Abstract Objective Ovarian cancer comprises several histological groups with widely differing levels of survival. We aimed to explore international variation in survival for each group to help interpret international differences in survival from all ovarian cancers combined. We also examined differences in stage-specific survival. Methods The CONCORD programme is the largest population-based study of global trends in cancer survival, including data from 60 countries for 695,932 women (aged 15–99years) diagnosed with ovarian cancer during 1995–2009. We defined six histological groups: type I epithelial, type II epithelial, germ cell, sex cord-stromal, other specific non-epithelial and non-sp…

0301 basic medicineOncologySettore MED/42 - Igiene Generale E Applicata0302 clinical medicinemorphology80 and overStage (cooking)Aged 80 and overOvarian Neoplasmseducation.field_of_studyepidemiology; histology; morphology; ovarian cancer; stage; survival; Adolescent; Adult; Aged; Aged 80 and over; Female; Humans; Middle Aged; Neoplasm Staging; Ovarian Neoplasms; Oncology; Obstetrics and GynecologyObstetrics and Gynecologyepidemiology; histology; morphology; ovarian cancer; stage; survivalMiddle AgedTransitional cell carcinomaovarian cancerOncology030220 oncology & carcinogenesisClear cell carcinomaepidemiologyFemaleHumanAdultmedicine.medical_specialtyAdolescentPopulationSocio-culturalesurvivalArticlehistology03 medical and health sciencesInternal medicinemedicineHumansovarian cancer epidemiology survival stage morphology histologyeducationepidemiology ; histology ; morphology ; ovarian cancer ; stage ; survivalCancer stagingAgedNeoplasm StagingGynecologybusiness.industryOvarian NeoplasmCancermedicine.diseasestageCancer registry030104 developmental biologyOvarian cancerbusiness
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Resolved versus confirmed ARDS after 24 h: insights from the LUNG SAFE study

2018

Purpose: To evaluate patients with resolved versus confirmed ARDS, identify subgroups with substantial mortality risk, and to determine the utility of day 2 ARDS reclassification. Methods: Our primary objective, in this secondary LUNG SAFE analysis, was to compare outcome in patients with resolved versus confirmed ARDS after 24 h. Secondary objectives included identifying factors associated with ARDS persistence and mortality, and the utility of day 2 ARDS reclassification. Results: Of 2377 patients fulfilling the ARDS definition on the first day of ARDS (day 1) and receiving invasive mechanical ventilation, 503 (24%) no longer fulfilled the ARDS definition the next day, 52% of whom initial…

MaleARDSmedicine.medical_treatmentlnfectious Diseases and Global Health Radboud Institute for Molecular Life Sciences [Radboudumc 4]ARDS reassessment; ARDS Survival; Berlin criteria ARDS; Persisting ARDS;Critical Care and Intensive Care Medicineassisted ventilation0302 clinical medicineRisk Factors030212 general & internal medicinerisk factor AdultTidal volumecomparative studyeducation.field_of_studyRespiratory Distress SyndromeMortality rateRemission Inductiontidal volumeARDS reassessment; ARDS Survival; Berlin criteria ARDS; Persisting ARDS; Critical Care and Intensive Care MedicineARDS reassessmentartificial ventilationclinical trialimmunosuppressive treatmentadult respiratory distress syndromeMiddle AgedARDS SurvivalMonte Carlo methodmedicine.anatomical_structureclassificationpositive end expiratory pressureCardiologyDisease ProgressionSOFA scoredisease severityFemaleAdultmedicine.medical_specialtyPopulationdisease classificationArticleNO03 medical and health sciencesremissionlength of stayAnesthesiologyInternal medicinemedicinepneumoniaSequential Organ Failure Assessment ScoreHumanshumaneducationAgedMechanical ventilationhospital mortalityLungbusiness.industryRisk Factordisease associationRespiratory Distress Syndrome AdultPersisting ARDSmedicine.diseasemajor clinical studymortalityRespiration Artificialbreathing rate030228 respiratory systemdisease exacerbationBerlin criteria ARDSbusinessIntensive care medicine
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Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission

2021

The measurement of the energy spectrum of cosmic ray helium nuclei from 70 GeV to 80 TeV using 4.5 years of data recorded by the DArk Matter Particle Explorer (DAMPE) is reported in this work. A hardening of the spectrum is observed at an energy of about 1.3 TeV, similar to previous observations. In addition, a spectral softening at about 34 TeV is revealed for the first time with large statistics and well controlled systematic uncertainties, with an overall significance of $4.3\sigma$. The DAMPE spectral measurements of both cosmic protons and helium nuclei suggest a particle charge dependent softening energy, although with current uncertainties a dependence on the number of nucleons canno…

Astrophysics::High Energy Astrophysical PhenomenaDark matterGeneral Physics and Astronomychemistry.chemical_elementFOS: Physical sciencesCosmic raySpace (mathematics)01 natural sciences7. Clean energyCosmic ray heliumHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)0103 physical sciencesEnergy spectrumcosmic rays dark matter spacecrystals010306 general physicsHeliumPhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)COSMIC cancer databasedetectorSettore FIS/01 - Fisica SperimentalecalibrationchemistryParticleAstrophysics - High Energy Astrophysical PhenomenaNucleonperformance
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Enhanced multinomial logit model for the analysis of choice experiments

2012

A sector of conjoint analysis (experimental design in marketing research) is made of the so called choice experiments. In choice experiments respondents undergo a questionnaire which is nowadays mostly submitted through the internet. The questionnaire proposes to the respondent a sequence of choice sets each one including two or more profiles, being a profile a specific combination of attribute levels. The respondent selects the preferred profile for each choice set. Responses given by a sample of respondents are analysed through suitable methods aimed to eventually find the best combination of attribute levels. One method of analysis adopts the Multinomial Logit (MLN) model. In this articl…

Multinomial LogitDiscrete choice experimentSettore SECS-S/02 - Statistica Per La Ricerca Sperimentale E TecnologicaSettore SECS-S/01 - Statistica
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Worldwide comparison of survival from childhood leukaemia for 1995–2009, by subtype, age, and sex (CONCORD-2): a population-based study of individual…

2017

BACKGROUND: Global inequalities in access to health care are reflected in differences in cancer survival. The CONCORD programme was designed to assess worldwide differences and trends in population-based cancer survival. In this population-based study, we aimed to estimate survival inequalities globally for several subtypes of childhood leukaemia. METHODS: Cancer registries participating in CONCORD were asked to submit tumour registrations for all children aged 0-14 years who were diagnosed with leukaemia between Jan 1, 1995, and Dec 31, 2009, and followed up until Dec 31, 2009. Haematological malignancies were defined by morphology codes in the International Classification of Diseases for …

childhood leukaemiaCancer registrieleukemiacancerchildhood cancerSocio-culturaleHematologySettore MED/42 - Igiene Generale E ApplicataHematology childhood leukaemia cancer survivalcancer survival
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Erratum to: Guidelines for the use and interpretation of assays for monitoring autophagy (3rd edition) (Autophagy, 12, 1, 1-222, 10.1080/15548627.201…

2016

non presente

Molecular Biology; Cell BiologyCell BiologySettore BIO/06 - Anatomia Comparata E CitologiaMolecular Biology
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K2 light curve alternative analysis of ASASSN-18bt

2020

On 2018 February 4.41, the All-Sky Automated Survey for SuperNovae (ASAS-SN) discovered ASASSN-18bt in the K2 Campaign 16 field. With a redshift of z=0.01098 and a peak apparent magnitude of B_max_=14.31, ASASSN-18bt is the nearest and brightest Supernovae Ia type (SNe Ia) yet observed by the Kepler spacecraft. Here we present the discovery of ASASSN-18bt, the K2 light curve, and prediscovery data from ASAS-SN and the Asteroid Terrestrial-impact Last Alert System. The K2 early-time light curve has an unprecedented 30-minute cadence and photometric precision for an SN Ia light curve, and it unambiguously shows a ~4 day nearly linear phase followed by a steeper rise. Thus, ASASSN-18bt joins a…

observational astronomyPhotometryAstrophysics and AstronomySupernovaeStellar AstronomyPhysicsNatural SciencesOptical astronomy
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