Duc Le

Duc Le
University of Bolton · School of Business Management

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450
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9,122
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Publications

Publications (450)
Preprint
Full-text available
Category theory can be used to state formulas in First-Order Logic without using set membership. Several notable results in logic such as proof of the continuum hypothesis can be elegantly rewritten in category theory. We propose in this paper a reformulation of the usual set-theoretical semantics of the description logic ALC by using categorical l...
Preprint
Lilith is a public Python library for constraining new physics from Higgs signal strength measurements. Version 2.0 of Lilith comes with an extensive XML database which includes the ATLAS and CMS Run 2 Higgs results for 36/fb, in addition the the Run 1 results. Both the code and the database were extended from the ordinary Gaussian approximation em...
Article
Full-text available
In this paper, we present results at next-to-leading order (NLO) QCD for photon pair production in association with two jets via vector boson scattering within the Standard Model (SM), and also in an effective field theory framework with anomalous gauge coupling effects via bosonic dimension-6 and 8 operators. We observe that, com- pared to other p...
Preprint
This document summarises the talks and discussions happened during the VBSCan Mid-Term Scientific Meeting workshop. The VBSCan COST action is dedicated to the coordinated study of vector boson scattering (VBS) from the phenomenological and experimental point of view, for the best exploitation of the data that will be delivered by existing and futur...
Preprint
In this paper, we present results at next-to-leading order (NLO) QCD for photon pair production in association with two jets via vector boson scattering within the Standard Model (SM), and also in an effective field theory framework with anomalous gauge coupling effects via bosonic dimension-6 and 8 operators. We observe that, compared to other pro...
Article
Full-text available
In this article we calculate the next-to-leading order (NLO) QCD corrections for single on-shell top-quark production in association with two jets at proton-proton colliders. The tW channel is assumed to be measured independently. The QCD corrections to the inclusive cross section are about 28% (22%) for top (antitop) quark production at the 13 TeV...
Preprint
We present a study of the polarization observables of the $W$ and $Z$ bosons in the process $p p \to W^\pm Z\to e^\pm \nu_e \mu^+\mu^-$ at the 13 TeV Large Hadron Collider. The calculation is performed at next-to-leading order, including the full QCD corrections as well as the electroweak corrections, the latter being calculated in the double-pole...
Article
Full-text available
Lilith is a public Python library for constraining new physics from Higgs signal strength measurements. We here present version 2.0 of Lilith together with an updated XML database which includes the current ATLAS and CMS Run 2 Higgs results for 36 fb ^{-1}−1 . Both the code and the database were extended from the ordinary Gaussian approximation emp...
Chapter
Link keys are recently introduced to formalize data interlinking between data sources. They are considered as a new kind of correspondences included in ontology alignments. We propose a procedure for reasoning in a decentralized manner on a network of ontologies with alignments containing link keys. In this paper, the ontologies involved in such a...
Preprint
In this article we calculate the next-to-leading order (NLO) QCD corrections for single on-shell top-quark production in association with two jets at proton-proton colliders. The tW channel is assumed to be measured independently. The QCD corrections to the inclusive cross section are about 28 (22)\% for top (anti-top) quark production at the 13 Te...
Preprint
The pair production of a $W$ and a $Z$ boson at the LHC is an important process to study the triple-gauge boson couplings as well as to probe new physics that could arise in the gauge sector. In particular the leptonic channel $p p \to W^\pm Z\to 3\ell +\nu + X$ is considered by ATLAS and CMS collaborations. Polarisation observables can help pinnin...
Article
Full-text available
A bstract We present a study at next-to-leading-order (NLO) of the process pp → W ± Z → ℓν l ℓ ′+ ℓ ′− , where ℓ, ℓ ′ = e, μ , at the Large Hadron Collider. We include the full NLO QCD corrections and the NLO electroweak (EW) corrections in the double-pole approximation. We define eight fiducial polarization coefficients directly constructed from t...
Article
Full-text available
We present a detailed discussion of the triplet anti-triplet symmetry in 3-3-1 models. The full set of conditions to realize this symmetry is provided, which includes in particular the requirement that the two vacuum expectation values of the two scalar triplets responsible for making the W and Z bosons massive must be interchanged. We apply this n...
Preprint
We present a detailed discussion of the triplet anti-triplet symmetry in 3-3-1 models. The full set of conditions to realize this symmetry is provided, which includes in particular the requirement that the two vacuum expectation values of the two scalar triplets responsible for making the W and Z bosons massive must be interchanged. We apply this n...
Preprint
WZ production is an important process at the LHC because it probes the non-Abelian structureof electroweak interactions and it is a background process for many new physics searches. In the quest for new physics, polarization observables of the W and Z bosons can play an important role. They can be extracted from measurements and can be calculated u...
Preprint
We present a study at next-to-leading-order (NLO) of the process $pp \to W Z \to \ell \nu_l \ell'^+ \ell'^-$, where $\ell,\ell' =e, \mu$, at the Large Hadron Collider. We include the full NLO QCD corrections and the NLO electroweak (EW) corrections in the double-pole approximation. We present a detailed analysis of the NLO EW+QCD polarization obser...
Article
Full-text available
Objective Respiratory motion in 18F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT) induces blurred images, leading to errors in location and quantification for lung and abdominal lesions. Various methods have been developed to correct for these artifacts, and most of current PET/CT scanners are equipped with a resp...
Article
Full-text available
Background: xSPECT Bone® (xB) is a new reconstruction algorithm developed by Siemens® in bone hybrid imaging (SPECT/CT). A CT-based tissue segmentation is incorporated into SPECT reconstruction to provide SPECT images with bone anatomy appearance. The objectives of this study were to assess xB/CT reconstruction diagnostic reliability and accuracy...
Article
It is well known that soils are influenced by the plant species that grow in them. Here we consider the effects of management-induced changes to plant communities and their soils during restoration within a 20-year manipulative experiment where the aim was to change a late-successional community dominated by the weed, Pteridium aquilinum, to an ear...
Article
Our understanding of an application domain evolves over time. If we consider an ontology as a set of semantic constraints which describes our understanding of an application domain, ontologies must be revised. Indeed, adding a new semantic constraint to an ontology may make it inconsistent. To restore consistency with minimal loss of semantics, we...
Article
Full-text available
Background SPECT/CT has been shown to increase the diagnostic performance of bone scintigraphy for staging of malignancies. A systematic double-bed SPECT/CT of the trunk may allow further improvement. However, this would be balanced by higher dosimetry and longer acquisition time. The objective was to assess the incremental diagnostic utility of a...
Article
Résumé La tomographie par émission de positons (TEP) au 18-fluoro-déoxy-glucose (FDG) a démontré depuis plusieurs années tout son intérêt en cancérologie. La physiopathologie du FDG explique son application de plus en plus fréquente pour les pathologies infectieuses, notamment cardiovasculaires telles que l’endocardite, sur dispositif cardiaque imp...
Article
Positron emission tomography (PET) with 18F-fluorodeoxyglucose (FDG) has for the past several years demonstrated its high value in oncology. The physiopathology of FDG explains its increasingly frequent use for inflammatory diseases such as vasculitis (giant cell arteritis or Takayasu's arteritis) as well as for granulomatous diseases (sarcoidosis,...
Article
Our understanding of an application domain evolves over time. If we consider an ontology as a set of semantic constraints which describes our understanding of an application domain, it is needed to revise ontologies. However, adding a new semantic constraint to an ontology may make it inconsistent. To restore consistency with minimal loss of semant...
Article
Résumé La scintigraphie osseuse représente un des principaux examens réalisés dans les centres de médecine nucléaire. Ses bonnes performances diagnostiques sont largement exploitées en oncologie, mais aussi de plus en plus dans le cadre de pathologies ostéoarticulaires. Cet article va s’attacher à détailler l’intérêt de la scintigraphie osseuse et...
Article
Full-text available
There is a need for management strategies to control dominant perennial weeds and restore seminatural communities. We compared the effects of five weed control treatments on dense Pteridium aquilinum relative to an untreated experimental control over an 8-year period with the aim of restoring acid grassland. The weed control treatments tested were...
Conference Paper
Full-text available
Semantics-based applications encapsulate commonly a set of ontologies which represent knowledge formalized from different data sources. Some of these ontologies may change over time since, not only data would be updated but also our understanding on application domain would evolve. To ensure that ontologies remain usable, it is needed to revise ont...
Article
Current diagnostic strategies for pulmonary embolism rely on the sequential use of noninvasive diagnostic tests including ventilation-perfusion (V/Q) scan and computed tomography pulmonary angiography (CTPA). V/Q scan remains criticized because of a high proportion of nondiagnostic test results, especially when the chest X-ray (CXR) is abnormal. Th...
Article
For many processes with electroweak bosons in the final state, next-to-leading order QCD and, in some cases, electroweak corrections have been calculated for differential cross sections at hadron colliders. The calculational techniques and some phenomenological implications are reviewed in this contribution. Processes discussed include vector boson...
Article
Résumé Objectif Évaluer la valeur prédictive positive de la scintigraphie aux leucocytes marqués dans le diagnostic d’infections ostéo-articulaires avec ou sans matériel chirurgical. Patients et méthodes Étude rétrospective portant sur 80 patients suspectés d’infection ostéo-articulaire, avec ou sans matériel chirurgical, ayant bénéficié d’une sc...
Article
Full-text available
We discuss results for di-boson plus two jets production processes at the LHC at NLO QCD. Issues related to the scale choice are reviewed. We focus on the distributions of the invariant mass and rapidity separation of the two hardest jets and show, for $W^\pm \gamma jj$ and $Z\gamma jj$ production, how the contribution from the radiative decays of...
Article
Full-text available
The QCD-induced $W^\pm \gamma$ production channels in association with two jets are computed at next-to-leading order QCD accuracy. The W bosons decay leptonicly and full off-shell and finite width effects as well as spin correlations are taken into account. These processes are important backgrounds to beyond Standard Model physics searches and als...
Article
Full-text available
VBFNLO is a flexible parton level Monte Carlo program for the simulation of vector boson fusion (VBF), double and triple vector boson (plus jet) production as well as QCD-induced single and double vector boson production plus two jets in hadronic collisions at next-to-leading order (NLO) in the strong coupling constant. Furthermore, Higgs boson plu...
Article
Full-text available
The main purpose of our study is to design a new multi-media learning platform to help staffs to acquire new skills for their professional progression. In particular, this new platform is aimed at learners who do not appreciate conventional training methods, and who prefer new kinds of media, personalized to their own background. From a learner's p...
Article
The invasion of native habitats by alien species has received considerable attention. However, in Britain high levels of dominance by a small number of aggressive native plant species may have an equal, or greater, impact on the richness of native woodlands. Here, we examine this hypothesis by modelling the realized niche of native-dominant species...
Article
Full-text available
We present a study of $W^+W^+jj$ and $W^-W^-jj$ production including leptonic decays in hadron-hadron collisions. The full electroweak and QCD induced contributions and their interferences are calculated at leading order. We find that, for inclusive cuts, the interference effects can be large if the jets are produced with large transverse momentum...
Article
The tri-boson production is one of the key processes for the study of quartic gauge couplings. Next-to-leading order (NLO) corrections are mandatory to reduce theoretical uncertainties. In this study, the most up-to-date predictions including NLO QCD and NLO EW corrections to the total cross section and distributions of the WWZ production at the LH...
Conference Paper
Full-text available
The Semantic Web makes an extensive use of the OWL DL ontology language, underlied by the \(\mathcal{SHOIQ}\) description logic, to formalize its resources. In this paper, we propose a decision procedure for this logic extended with the transitive closure of roles in concept axioms, a feature needed in several application domains. The most challeng...
Article
Full-text available
We present a summary of the first calculation of NLO QCD corrections to WZjj production with leptonic decays at the LHC. Our results show that the next-to-leading order corrections reduce significantly the scale uncertainties.
Article
Electroweak gauge boson pair production is a very important process at the LHC as it probes the non-abelian structure of electroweak interactions and is a background process for many searches. We present full next-to-leading order predictions for the production cross sections and distributions of on-shell massive gauge boson pair production in the...
Article
Full-text available
We report on the calculation of W^{±}Zjj production with leptonic decays at hadron-hadron colliders at next-to-leading order in QCD. These processes are important both to test the quartic gauge couplings of the standard model and because they constitute relevant backgrounds to beyond standard model physics searches. Our results show that the next-t...
Article
The production of WWZ at the LHC is an important process to test the quartic gauge couplings of the Standard Model as well as an important background for new physics searches. A good theoretical understanding at next-to-leading order (NLO) is therefore valuable. In this paper, we present the calculation of the NLO electroweak (EW) correction to thi...
Article
Full-text available
DRAOn is a distributed reasoner which offers inference services for a network of OWL ontologies correlated by alignments. Reasoning with such networks of ontologies depends on the semantics we define for alignments with respect to ontologies. DRAOn supports two semantics for a network of ontologies: the standard Description Logics (DL) semantics fo...
Article
Electroweak gauge boson pair production is one of the most important Standard Model processes at the LHC, not only because it is a benchmark process but also by its ability to probe the electroweak interaction directly. We present full next-to-leading order predictions for the production cross sections and distributions of on-shell massive gauge bo...
Article
Full-text available
The World Wide Web infrastructure together with its more than 2 billion users enables to store information at a rate that has never been achieved before. This is mainly due to the will of storing almost all end-user interactions performed on some web applications. In order to reply to scalability and availability constraints, many web companies inv...
Article
The dominant contribution to H-tb̅ production at the LHC is the gluon-gluon fusion parton subprocess. We perform for the case of the complex minimal supersymmetric standard model a complete calculation of the next-to-leading order (NLO) electroweak contributions to this channel. The other small contributions with quarks or photon in the initial sta...
Article
Full-text available
The validation of models is a crucial step in distributed heterogeneous systems. In this paper, an incremental validation method is proposed in the scope of a Model Driven Engineering (MDE) approach, which is used to develop a Master Data Management (MDM) field represented by XML Schema models. The MDE approach presented in this paper is based on t...
Article
Full-text available
Unlabelled: Ventilation-perfusion (V/Q) SPECT has been reported to improve the diagnostic performance of V/Q imaging for the diagnosis of pulmonary embolism (PE). However, only sparse data based on an objective reference test are available, and the criteria used for interpretation have varied widely. Therefore, the aim of our study was to assess t...
Article
Background The diagnosis of wrist fractures, especially scaphoid fractures, remains a challenge because of non-union risk. Currently new hybrid technologies are emerging such as single photon emission computed tomography–computed tomography (SPECT/CT) systems, which combine functional and anatomical data sets. So, we wanted to evaluate the utility...
Article
Background: The diagnosis of wrist fractures, especially scaphoid fractures, remains a challenge because of nonunion risk. Currently, new hybrid technologies are emerging such as SPECT/CT systems, which combine functional and anatomical data sets. So, we wanted to evaluate the utility of SPECT/CT in the management of occult carpal fractures. Meth...
Article
Objective To assess the added benefit of scanning lower limbs in addition to usual whole-body PET/CT scan in patients with no known or suspected primary or metastatic melanoma involving the lower limbs.Materials and methodsThis is a retrospective study of 133 consecutive patients (189 FDG PET/CT) who underwent FDG PET/CT for staging of melanoma at...
Patent
The present invention relates to Polycyclic Guanine Derivatives, compositions comprising the Polycyclic Guanine Derivatives and methods of using the Polycyclic Guanine Derivatives to treat pain or an inflammatory disease.
Article
Full-text available
The Semantic Web makes an extensive use of the OWL DL ontology language, underlied by the SHOIQ description logic, to formalize its resources. In this paper, we propose a decision procedure for this logic extended with the transitive closure of roles in concept axioms, a feature needed in several application domains. To address the problem of consi...
Conference Paper
Full-text available
No SQL stores are emerging as an efficient alternative to relational database management systems in the context of big data. Many actors in this domain consider that to gain a wider adoption, several extensions have to be integrated. Some of them focus on the ways of proposing more schema, supporting adapted declarative query languages and providin...
Conference Paper
Full-text available
Résumé. 1 Dans le domaine de l'enseignement, l'apprentissage collaboratif est une stratégie très importante qui nécessite la constitution d'une équipe de travail et différentes formes d'interaction entre les membres de cette équipe, permettant les processus de développement de l'acquisition et de la construction de la connaissance. En intelligence...
Article
Full-text available
In this work, we propose an ExpSpace tableau-based algorithm for deciding consistency of a knowledge base in the description logic SHOIQ. The construction of this algorithm is founded on the standard tableau-based method for SHOIQ and the technique used for designing a NExpTime algorithm for the two-variable fragment of first-order logic with count...
Article
High tumor uptake of fluorodeoxyglucose (FDG) is associated with an unfavorable outcome in patients with cancer. We evaluated FDG uptake as a prognostic factor in patients with head and neck squamous cell carcinoma. Maximum standardized uptake values (SUVmax) of tumor, liver, and pulmonary artery were recorded. Ratios of SUVmax from tumor to liver...
Article
Full-text available
Flooding is a fundamental operation in wireless ad hoc networks to propagate control messages in the entire network. The traditional flooding scheme generates excessive packet retransmissions, resource contention, and collisions since every node forwards the packet at least once. Several flooding schemes have been proposed to avoid these problems....
Article
Full-text available
The "Dictionary of Spirituality" is an encyclopedia used by researchers in religious studies and Divinity. Its digital version allows the researcher to make some revisions to existing articles (or entries) or write new entries. The dictionary embodies the domain ontology on which each researcher can create a local ontology that reflects his own vis...