Search results for "Import"
showing 10 items of 286 documents
Prioritisation of alternatives with analytical hierarchy process plus response latency and web surveys
2014
This paper introduces a new method that combines the well-known analytical hierarchy process (AHP) with a response latency metric. The response latency is the time taken by respondents to make choices over pairwise comparisons. The analytical calculation of relative importance weights of the alternatives is made by using a response latency model previously validated in several case studies. This combination aims to overcome some drawbacks of the traditional AHP related to the use of a rating scale (the so-called Saaty scale), and it is a natural way to involve response latency in established decisionmaking methods. This new method can be profitably adopted in web surveys where it is easy to…
Benralizumab Effectiveness in Severe Eosinophilic Asthma with and without Chronic Rhinosinusitis with Nasal Polyps: A Real-World Multicenter Study
2021
Background: Chronic rhinosinusitis with nasal polyps (CRSwNP) affects around 60% of patients with severe eosinophilic asthma (SEA). Benralizumab was recently approved for SEA add-on treatment. Objective: To assess the real-world effectiveness of benralizumab in SEA with or without CRSwNP. Methods: We conducted a multicenter observational study, including patients with SEA treated with benralizumab for 24 weeks in 12 Italian specialized facilities. Asthma exacerbations, Asthma Control Test (ACT), lung function, oral corticosteroid (OCS) dosage, and eosinophil and basophil count in peripheral blood were recorded at baseline and after 4, 12, and 24 weeks. The 22-item Sino-Nasal Outcome Test (S…
Factores desencadenantes del perjuicio de los simúlidos
2021
El incremento de los daños causados por los dípteros simúlidos, desde finales de la década de los 90, ha suscitado un interés especial en el estudio de este grupo de dípteros en nuestro país. Además de la importancia de los estudios faunísticos, para conocer las especies presentes en nuestros hábitats, resulta de interés conocer otros aspectos ligados a la incidencia de sus ataques tanto al ser humano como a las especies animales de interés veterinario. La revisión del estado actual de la familia Simuliidae en España ha permitido la confección del listado de las 52 especies presentes y sus mapas de distribución. Se han llevado a cabo estudios de eficacia de tratamientos biol…
Fizisko aktivitāšu nozīme Latvijas iedzīvotāju labklājības veicināšanā
2018
Darba nosaukums ir “Fizisko aktivitāšu nozīme Latvijas iedzīvotāju labklājības veicināšanā”. Darba mērķis ir noskaidrot vai Latvijas iedzīvotāji nodarbojas ar fiziskajām aktivitātēm un, ja nodarbojas, tad kā tas ir saistīts ar noteiktām labklājības dimensijām. Darbā tika izvirzītas četras hipotēzes: (1) Sociāli aktīvi cilvēki biežāk izvēlas nodarboties ar fiziskajām aktivitātēm; (2)Respondenti, kuri nenodarbojas ar fiziskajām aktivitātēm ikdienā izjūt, ka viņiem ir sliktāka veselība; (3)Visretāk izplatītais iemesls, lai nodarbotos ar fiziskajām aktivitātēm, ir labs izskats; (4)Respondenti, kuri nodarbojas ar fiziskajām aktivitātēm, biežāk izjūt pozitīvas emocijas (prieks, laime, bauda). Dar…
Binding Sites, Vibrations and Spin-Lattice Relaxation Times in Europium(II)-Based Metallofullerene Spin Qubits.
2021
Abstract To design molecular spin qubits with enhanced quantum coherence, a control of the coupling between the local vibrations and the spin states is crucial, which could be realized in principle by engineering molecular structures via coordination chemistry. To this end, understanding the underlying structural factors that govern the spin relaxation is a central topic. Here, we report the investigation of the spin dynamics in a series of chemically designed europium(II)‐based endohedral metallofullerenes (EMFs). By introducing a unique structural difference, i. e. metal‐cage binding site, while keeping other molecular parameters constant between different complexes, these manifest the ke…
Komercdarbības reorganizācijas virzieni Latvijas Republikā
1992
Komerсzinību katedra ir veikusi pētījumus komercdarbības reorganizācijas jautājumos. Galvenā uzmanība veltīta komercizglītībai konceptuālā un profesionālās sagatavošanas aspektā. Krājumā sniegtas izstrādes mārketinga un tirgus izpētes jautājumos.
Cross Correlations in Scaling Analyses of Phase Transitions
2008
Thermal or finite-size scaling analyses of importance sampling Monte Carlo time series in the vicinity of phase transition points often combine different estimates for the same quantity, such as a critical exponent, with the intent to reduce statistical fluctuations. We point out that the origin of such estimates in the same time series results in often pronounced cross-correlations which are usually ignored even in high-precision studies, generically leading to significant underestimation of statistical fluctuations. We suggest to use a simple extension of the conventional analysis taking correlation effects into account, which leads to improved estimators with often substantially reduced …
Assessing the quality of studies in meta-research: Review/guidelines on the most important quality assessment tools
2020
Systematic reviews and meta-analyses pool data from individual studies to generate a higher level of evidence to be evaluated by guidelines. These reviews ultimately guide clinicians and stakeholders in health-related decisions. However, the informativeness and quality of evidence synthesis inherently depend on the quality of what has been pooled into meta-research projects. Moreover, beyond the quality of included individual studies, only a methodologically correct process, in relation to systematic reviews and meta-analyses themselves, can produce a reliable and valid evidence synthesis. Hence, quality of meta-research projects also affects evidence synthesis reliability. In this overview…
Importance sampling correction versus standard averages of reversible MCMCs in terms of the asymptotic variance
2017
We establish an ordering criterion for the asymptotic variances of two consistent Markov chain Monte Carlo (MCMC) estimators: an importance sampling (IS) estimator, based on an approximate reversible chain and subsequent IS weighting, and a standard MCMC estimator, based on an exact reversible chain. Essentially, we relax the criterion of the Peskun type covariance ordering by considering two different invariant probabilities, and obtain, in place of a strict ordering of asymptotic variances, a bound of the asymptotic variance of IS by that of the direct MCMC. Simple examples show that IS can have arbitrarily better or worse asymptotic variance than Metropolis-Hastings and delayed-acceptanc…
Importance sampling type estimators based on approximate marginal Markov chain Monte Carlo
2020
We consider importance sampling (IS) type weighted estimators based on Markov chain Monte Carlo (MCMC) targeting an approximate marginal of the target distribution. In the context of Bayesian latent variable models, the MCMC typically operates on the hyperparameters, and the subsequent weighting may be based on IS or sequential Monte Carlo (SMC), but allows for multilevel techniques as well. The IS approach provides a natural alternative to delayed acceptance (DA) pseudo-marginal/particle MCMC, and has many advantages over DA, including a straightforward parallelisation and additional flexibility in MCMC implementation. We detail minimal conditions which ensure strong consistency of the sug…