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Effect of insoluble materials on the volumetric behavior of rock salt

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Journal of Rock Mechanics and Geotechnical Engineering 2021年第1期13卷 84-97页

作者： Mejda Azabou Ahmed Rouabhi Laura blanco-Martìn MINES ParisTech PSL Research UniversityCentre de Géosciences35 rue St HonoréFontainebleau77300France

This paper focuses on the presence of nodules of insoluble materials within salt specimens,and their effect on the volumetric strain measurements and the dilatancy *** analyzed experimental results of over 120 conventional triaxial compression tests,and found that in 20%of the cases,the volumetric strain measurements were *** also noted that the natural variability of the specimens can lead to a non-negligible data scattering in the volumetric strain measurements when different specimens are subjected to the same *** is expected given the small magnitude of those strains,but it occasionally implies that the corresponding specimens are not representative of the volumetric behavior of the studied *** order to understand these results,we numerically investigated salt specimens modeled as halite matrices with inclusions of *** of triaxial compression tests on these structures proved that such heterogeneities can induce dilatancy,and their presence can lead to the appearance of tensile zones which is physically translated into a micro-cracking *** modeling approach is validated as the patterns displayed in the numerical results are identical to that in the *** was then employed to explain the observed irregularities in experimental *** studied the natural variability effect as well and proposed a methodology to overcome the issue of specimen representativity from both deviatoric and volumetric perspectives.

关键词： Rock salt Dilatancy Material heterogeneity Natural variability Triaxial tests Virtual laboratory

Verdier quotients of homotopy categories of rings and Gorenstein-projective precovers

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Science China Mathematics 2024年第12期67卷 2701-2712页

作者： manuel Cortes-Izurdiaga Departamento de Matematica Aplicada Universidad de MalagaMalaga 29071Spain

Let R be a ring, Proj be the class of all the projective right R-modules, K be the full subcategory of the homotopy category K(Proj) whose class of objects consists of all the totally acyclic complexes, and MorK be the class of all the morphisms in K(Proj) whose cones belong to K. We prove that if K(Proj) has enough MorK-injective objects, then the Verdier quotient K(Proj)/K has small Hom-sets, and this last condition implies the existence of Gorenstein-projective precovers in Mod-R and of totally acyclic precovers in C(Mod-R).

关键词： homotopy category Gorenstein-projective precover Verdier quotient small Hom-sets totally acyclic complex

Reconstructing the puzzle of the role of therapeutic endoscopy in the management of post-bariatric surgery complications

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World Journal of Gastroenterology 2022年第23期28卷 2633-2635页

作者： Konstantinos Argyriou Adolfo Parra-blanco Department of Gastroenterology University Hospital of LarisaLarisa GR41110Greece Department of Gastroenterology Nottingham University Hospitals NHS TrustNottingham NG51PBUnited Kingdom

We have recently read with interest the mini-review article"Therapeutic endoscopy for the treatment of post-bariatric surgery complications".The abovementioned article is a brief overview of the different endoscopic modalities employed in the management of bariatric surgery complications and represents an important decision support tool for clinicians to improve their current *** we appreciate the endeavor of Larsen and Kozarek,based on our indepth analysis,we came across several minor issues in this article;thus,we present our comments in this *** case the authors contemplate these comments in their relevant research,we believe that their contribution would be considerable for future studies.

关键词： Endoscopic treatment Bariatric surgery Complications Obesity Sleeve gastrectomy Roux-en-Y gastric bypass

Automated extraction of attributes from natural language attribute-based access control(ABAC)Policies

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Cybersecurity 2019年第1期2卷 38-62页

作者： Manar Alohaly Hassan Takabi Eduardo blanco Department of Computer Science and Engineering University of North TexasDentonTXUSA College of Computer and Information Sciences Princess Nourah bint Abdulrahman UniversityRiyadhSaudi Arabia

The National Institute of Standards and Technology(NIST)has identified natural language policies as the preferred expression of policy and implicitly called for an automated translation of ABAC natural language access control policy(NLACP)to a machine-readable *** study the automation process,we consider the hierarchical ABAC model as our reference model since it better reflects the requirements of real-world ***,this paper focuses on the questions of:how can we automatically infer the hierarchical structure of an ABAC model given NLACPs;and,how can we extract and define the set of authorization attributes based on the resulting *** address these questions,we propose an approach built upon recent advancements in natural language processing and machine learning *** such a solution,the lack of appropriate data often poses a ***,we decouple the primary contributions of this work into:(1)developing a practical framework to extract authorization attributes of hierarchical ABAC system from natural language artifacts,and(2)generating a set of realistic synthetic natural language access control policies(NLACPs)to evaluate the proposed *** experimental results are promising as we achieved-in average-an F1-score of 0.96 when extracting attributes values of subjects,and 0.91 when extracting the values of objects’attributes from natural language access control policies.

关键词： Attribute-based access control(ABAC)policy authoring natural language processing relation extraction clustering deep learning

Effect of magnetic field orientation on fluidized beds of magnetic particles:Theory and experiment

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Particuology 2014年第1期12卷 54-63页

作者： Miguel ángel Sánchez Quintanilla manuel Jesús Espin José manuel Valverde Department of Electronics and Electromagnetism University of Seville Department of Applied PhysicsⅡ University of Seville

Geldart-A fluidized beds of fine particles experience a jamming transition between a fluid-like state and a solid-like state at a certain superficial gas velocity, that depends on the relative strength of interparticle attractive forces with respect to particle weight, lnterparticle forces provide the bed with a certain tensile strength in the jammed state. In the work presented here we analyze the behavior of a fluidized bed of magnetic particles subjected to an externally applied magnetic field, which contributes to enhance interparticle forces. The importance of the magnetic contribution to interparticle forces is measured by the changes in the tensile strength and the superficial gas velocity at the jamming transition. The link of the field orientation with the microstructure of the bed is discussed,

关键词： Magneto-fluidization Jamming transition Fluidization Fine powders Cohesion Magnetization

Hyperbolic Moment Equations in Kinetic Gas Theory Based on Multi-Variate Pearson-IV-Distributions

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Communications in Computational Physics 2010年第4期7卷 639-673页

作者： manuel Torrilhon Seminar for Applied Mathematics ETH ZurichSwitzerland

In this paper we develop a new closure theory for moment approximationsin kinetic gas theory and derive hyperbolic moment equations for 13 fluid variablesincluding stress and heat flux. Classical equations have either restricted hyperbolicity regions like Grad’s moment equations or fail to include higher moments in apractical way like the entropy maximization approach. The new closure is based onPearson-Type-IV distributions which reduce to Maxwellians in equilibrium, but allowanisotropies and skewness in non-equilibrium. The closure relations are essentiallyexplicit and easy to evaluate. Hyperbolicity is shown numerically for a large range ofvalues. Numerical solutions of Riemann problems demonstrate the capability of thenew equations to handle strong non-equilibrium.

关键词： Kinetic gas theory moment approximations hyperbolic partial differential equations.

Evidence-based considerations on bowel preparation for colonoscopy

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World Journal of Gastroenterology 2022年第31期28卷 4463-4466页

作者： Konstantinos Argyriou Adolfo Parra-blanco Department of Gastroenterology University Hospital of LarisaLarisa GR41334Greece Department of Gastroenterology Nottingham University Hospitals NHS TrustNottingham NG51PBUnited Kingdom

We recently read with interest the article,“Novel frontiers of agents for bowel cleansing for colonoscopy”.This is a practical narrative review,which could be of particular importance to clinicians in order to improve their current *** we appreciate the venture of our colleagues,based on our in-depth analysis,we came across several minor issues in the article;hence,we present our comments in this *** the authors consider these comments further in their relevant research,we believe that their contribution would be of considerable importance for future studies.

关键词： Colonoscopy Bowel preparation Polyethylene glycol Post-polypectomy syndrome Post-polypectomy complications

Notes on the genus Arrhenia(I):Arrhenia pontevedrana,*** ***(Agaricales,Basidiomycota),from the northwest of the Iberian Peninsula

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Studies in Fungi 2019年第1期4卷 185-191页

作者： blanco-Dios JB Centro de Formación e Experimentación Agroforestal de Lourizán.Consellería do Medio Rural.Xunta de Galicia.P.O.Box 127.36003 Pontevedra Spain

Arrhenia pontevedrana is described as a new species to science from Galicia(NW of Iberian Peninsula)based on morphological characteristics.A detailed description of basidiomata and microstructures of this species and a comparison with its morphologically closely related taxa are *** subglobisemen is recorded for the first time from the Iberian *** new combination Arrhenia kuhnerii is also proposed.

关键词： Biodiversity Spain Taxonomy Tricholomataceae

Oral disease is linked to low nestling condition and brood size in a raptor species living in a highly modified environment

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Current Zoology 2023年第2期69卷 109-120页

作者： Guillermo blanco Oscar Frias Aida Pitarch Martina Carrete Department of Evolutionary Ecology Museo Nacional de Ciencias NaturalesCSiC.Jose Gutierrez Abascal 2Madrid 28006Spain Department of Physical Chemical and Natural SystemsUniversidad Pablo de OlavideSevilla 41013Spain Department of Microbiology and Parasitology Faculty of PharmacyComplutense University of Madrid(UCM)and Ramon y Cajal Institute of Health Research(IRYCIS)Madrid 28040Spain Teaching Unit of Microbiology and Parasitology Faculty of Optics and OptometryComplutense University of Madrid(UCM)Madrid 28037Spain

Anthropogenic stressors can favor the occurrence of noninfectious disease that can be worsened by the impact of opportunistic pathogens,making the epizootiology of environmental diseases difficult to *** incidence and impact of oral lesions in nestlings of a facultative scavenger species,the black kite Milvus migrans,were examined over seven breeding seasons in the highly degraded environment close to Madrid,*** found an overall prevalence of 31%of nestlings with oral lesions,with no clear spatial pattern in nests with affected and unaffected *** occurrence and number of oral lesions were negatively associated with nestling body condition and brood ***,where all siblings had oral lesions,were smaller than those where some or all siblings were apparently healthy,suggesting that oral disease could be causing nestling mortality and,consequently,brood size *** turn,nestling body condition was negatively affected by lesion occurrence,brood size,and laying *** these relationships were bidirectional,piecewise structural equation modeling analyses showed a greater negative effect of body condition on lesion occurrence than vice versa,indicating that nestlings in poorer body condition were more likely to develop oral lesions(which could contribute to aggravate their state of deterioration)than those in better *** from small broods were also more likely to have oral disease(directly or indirectly through their lower body condition)than nestlings from large *** that hatched last in the broods showed greater development stress than those that hatched *** stressors could trigger poor body condition,and contribute to microbiota dysbiosis-related *** further research is needed to determine the consequences for the long-term fitness of individuals,actions should be taken to mitigate adverse conditions that may favor the appearance of environmental diseases associatedwithpe

关键词： breeding success body condition developmental stress environmental disease habitat degradation opportunistic pathogens pollution raptor