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Simplicial Indicator Kriging

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journal of China University of Geosciences 2008年第1期19卷 65-71页

作者： R Tolosana-delgado V Pawlowsky-Glahn j j Egozcue Department of Sedimentology and Environmental Geology Georg-August-Universitt Gttingen D-37077 Gttingen Germany Department of Computer Science and Applied Mathematics University of Girona Girona Spain Department of Applied Mathematics III Universidad Politécnica de Catalunya Barcelona Spain

Indicator kriging （IK） is a spatial interpolation technique devised for estimating a conditional cumulative distribution function at an unsampled location. The result is a discrete approximation, and its corresponding estimated probability density function can be viewed as a composition in the simplex. This fact suggested a compositional approach to IK which, by construction, avoids all its standard drawbacks （negative predictions, not-ordered or larger than one）. Here, a simple algorithm to develop the procedure is presented.

关键词： Aitchison geometry compositional data disjunctive kriging log-ratio approach simplex.

On the Structure of Graded Leibniz Algebras

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Algebra Colloquium 2015年第1期22卷 83-96页

作者： Antonio j. Calderon Martin jose M. Sfinchez delgado Departamento de Matemdticas Universidad de Cadiz 11510 Puerto Real Cadiz Spain

We study the structure of graded Leibniz algebras with arbitrary dimension and over an arbitrary base field K. We show that any of such algebras ￡ with a symmetric G-support is of the form ￡ = U-∑jIj with U a subspace of ￡1, the homogeneous component associated to the unit element 1 in G, and any Ij a well described graded ideal of ￡, satisfying [Ij, Ik]= 0 if j≠ k. In the case of ￡ being of maximal length, we characterize the gr-simplicity of the algebra in terms of connections in the support of the grading.

关键词： graded Leibniz algebra infinite dimensional Leibniz algebra structure theory

Generalized Baumslag-Solitar Graphs with Soluble Fundamental Groups

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Algebra Colloquium 2014年第1期21卷 53-58页

作者： Alberto L. delgado Derek j.S. Robinson Mathew Timm vDepartment of Mathematics illinois State University Normal IL 61790 USA Department of Mathematics University of Illinois at Urbana-Champaign Urbana IL 61801 USA Department of Mathematics Bradley University Peoria IL 61625 USA

It is shown that the generalized Baumslag-Solitar graphs which have soluble fundamental groups can be constructed from four simple types of graph by a process of decoration. The method of proof is elementary and emplo... 详细信息

关键词： generalized Baumslag-Solitar graph soluble fundamental group

Modified activated carbon with interconnected fibrils of iron-oxyhydroxides using Mn^(2+) as morphology regulator, for a superior arsenic removal from water

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journal of Environmental Sciences 2019年第2期31卷 403-414页

作者： Cesar Nieto-delgado joel Gutiérrez-Martínez j.Rene Rangel-Méndez Environmental Sciences Division Potosino Institute of Scientific and Technological ResearchIPICyT

The arsenic removal efficiency of iron-modified activated carbons depends greatly on the number of available iron oxide surface sites, which are given by the surface area of the anchored particles. In this sense, aiming the generation of an adsorbent with superior arsenic adsorption capacity, we developed a protocol to anchor interconnected fibrils of iron oxyhydroxides, using Mn^(2+) as a morphology regulator. The protocol was based on a microwave-assisted hydrothermal method, using bituminous based activated carbon and both Fe^(2+) and Mn^(2+) ions in the hydrolysis solution. The elemental analysis of modified carbons revealed that Mn does not anchor to the carbon. However, when Mn is included in the hydrolysis solution, the iron content in the activated carbon increased up to 3.5 wt%,without considerable decreasing the adsorbent surface area. Under specific hydrothermal conditions, the Mn^(2+) promoted the formation of iron oxide nanoparticles shaped as interconnected fibrils. This material showed a superior arsenic adsorption capacity in comparison to similar iron modified activated carbons(5 mg As/g carbon, at 2 mg As/L),attributed to the increase in quantity and availability of active sites located on the novel interconnected fibrils of iron oxyhydroxides nanostructures.

关键词： Iron oxide nanostructures Hydrothermal synthesis Microwave Adsorption capacity Kinetics

Sustainable geotourism using digital technologies along a rural georoute in Monsagro(Salamanca,Spain)

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International journal of Digital Earth 2017年第2期10卷 121-138页

作者： A.M.Martínez-Graña L.Serrano j.A.González-delgado C.j.Dabrio P.Legoinha Department of Geology Faculty of SciencesUniversity of SalamancaSalamancaSpain Department of Stratigraphy Faculty of GeologyComplutense UniversityMadridSpain GeoBioTec Departamento de Ciências da TerraFaculdade de Ciências e TecnologiaUniversidade Nova de LisboaCaparicaPortugal

Rural geotourism looks at the natural resources of the territory as a means of promoting a specialized,educational,sustainable *** is an increasingly sought-after *** paper presents a rural georoute across a high mountain village,highlighting the remarkable value of the geological heritage of biological trace fossils and physical sedimentary structures exposed on street pavements and façades of houses.A series of tourist georesources were created and implemented:educational and interpretive panels,videos,QR codes,geoapps and games,all of which promote and disseminate the exceptional geological content and the history of the earth through the use of new technologies(smartphones,ipod,etc.).All this is intended as a means to make geotourism a natural tourism,favoring experiences,whilst explaining the natural environment and its temporal and spatial dimensions,offering opportunities for socio-economic development and job creation in rural areas with problems of depopulation.

关键词： Digital geotourism geological heritage georoute sustentability geotourism tourist georesources

Land cover changes and fragmentation in mountain neotropical ecosystems of Oaxaca, Mexico under community forest management

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journal of Forestry Research 2019年第1期30卷 143-155页

作者： Rafael M~a Navarro Cerrillo Dennis j.Esteves Vieira Susana Ochoa-Gaona Bernardus H.j.de jong M~a del Mar delgado Serrano Depto. Ingeniería Forestal Laboratorio de SelviculturaDendrocronología y Cambio Climático.Dendrodat Lab-ERSAF Universidad de Córdoba Depto. de Engenharia Florestal Faculdade de Engenharia Florestal Laboratório de Sensoriamento Remoto e Geotecnologia Universidade Federal de Mato Grosso Departamento de Ciencias de la Sustentabilidad El Colegio de la Frontera Sur-Unidad Campeche Depto. Economía Sociología y Política Agrarias Grupo de Evaluación y Restauración de Sistemas Agrícolas y Forestales-ERSAF Universidad de Córdoba

Changes in land cover have a direct impact on forest ecosystem goods and services. In this study, changes in land cover in Sierra de juarez–Oaxaca ecosystems were estimated using a consistent processing of Landsat images and OBIA methodology. Additionally, landscape analyses using FRAGSTAT were conducted. In 2014, Sierra de juarez–Oaxaca was covered by approximately 84% of forests, mainly pine-oak and cloud forests. After extensive deforestation until 2001, this trend was reversed and the forest cover surface area in 2014 was slightly higher than in 1979. The comparison of the landscape structure of the forested and agricultural lands suggests an increase in habitat heterogeneity. However, interspersion and juxtaposition indices, showing the patch shape by patch area and perimeter, were similar throughout the study period(1979–2014). Social and economic drivers can explain this situation: namely, community organization, forest enterprises, payment for ecosystem services programs, and changes of agricultural activity. Communities in the Sierra of Oaxaca have reforested degraded lands, created community forest enterprises, and preserved the forest under conservation schemes like those proposed by the Mexican payment for ecosystem services programs. However, their sustainable management faces internal challenges and has become highly dependent on political and institutional decisions beyond their control.

关键词： Tropical and temperate forests Social forestry Land uses segmentation OBIA FRAGSTAT

Impact of age on transcatheter aortic valve implantation outcomes：a comparison of patients aged≤ 80 years versus patients ＆gt; 80 years

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journal of Geriatric Cardiology 2016年第1期13卷 31-36页

作者： Frank van der Kley Philippe j van Rosendael Spyridon Katsanos Vasileios Kamperidis Nina A Marsan Ioannis Karalis Arend de Weger Meindert Palmen jeroen j Bax Martin j Schalij Victoria delgado Heart Lung Center Leiden University Medical Center Leiden the Netherlands

ObjectiveTo investigate the procedural outcomes and the long-term survival of patients undergoing transcatheter aortic valve implantation （TAVI） and compare study results of patients≤ 80 years and patients ＆gt; 80 years *** total of 240 patients treated with TAVI were divided into two groups according to age≤ 80 years （n = 105; 43.8%） and ＆gt; 80 years （n= 135; 56.2%）. The baseline characteristics and the pro-cedural outcomes were compared between these two groups of *** the exception of peripheral artery disease and hypercho-lesterolemia, which were more frequently observed in the older age group, baseline characteristics were comparable between groups. Complica-tion rates did not differ significantly between patients≤ 80 years and patients ＆gt; 80 years. There were no differences in 30-day mortality rates be-tween patients aged≤ 80 years and patients ＆gt; 80 years old （9.5%vs. 7.4%, respectively;P = 0.557）. After a median follow-up of 28 months （in-terquartile range： 16-42 months）, 50 （47.6%） patients aged≤ 80 years died compared to 57 （42%） deaths in the group of patients ＆gt; 80 years old （P= 0.404）.ConclusionThe results of the present single center study showed that age did not significantly impact the outcomes of TAVI.

关键词： Age Survival rate Transcatheter aortic valve implantation

ON THE STRUCTURE OFⅡⅢ2□VI4 SEMICONDUCTING COMPOUNDS

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ON THE STRUCTURE OFⅡⅢ2□VI4 SEMICONDUCTING COMPOUNDS

Outcomes of abdominal surgery in patients with liver cirrhosis

Sixteenth Congress of the International Union of Crystallography

作者： j.M.delgado Departamento de Quimica Facultad de CienciasUniversidad de Los AndesMeridaVenezuela 5101

There have been conflicting reports on the nature of the space group of a number ofⅡⅢ□VI semiconductors. These materials have been described in space group 14 2m as well as 14:

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World journal of Gastroenterology 2016年第9期22卷 2657-2667页

作者： j.an C Lopez-delgado josep Ballus Francisco Esteve Nelson L Betancur-Zambrano Vicente Corral-Velez Rafael Manez Antoni j Betbese j.an A Roncal Casimiro javierre Hospital Universitari de Bellvitge Intensive Care Department L'Hospitalet de Llobregat 08907 Barcelona Spain IDIBELL (Institut d'Investigacio Biomedica Bellvitge Biomedical Investigation Institute of Bellvitge) Research Team of Area of Innate Immunity and Pathology of the Critical Patient L'Hospitalet de Llobregat 08908 Barcelona Spain Hospital de la Santa Creu i Sant Pau Intensive Care Department 08041 Barcelona Spain Physiological Sciences II Department Universitat de Barcelona Campus Bellvitge 08907 Barcelona Spain

Patients suffering from liver cirrhosis(LC) frequently require non-hepatic abdominal surgery,even before liver *** is an important risk factor itself for surgery,due to the higher than average associated morbidity and *** high surgical risk occurs because of the pathophysiology of liver disease itself and to the presence of contributing factors,such as coagulopathy,poor nutritional status,adaptive immune dysfunction,cirrhotic cardiomyopathy,and renal and pulmonary dysfunction,which all lead to poor *** evaluation of these factors and the degree of liver disease can help to reduce the development of complications both during and after abdominal *** the emergency setting,with the presence of decompensated LC,alcoholic hepatitis,severe/advanced LC,and significant extrahepatic organ dysfunction conservative management is preferred.A multidisciplinary,individualized,and specialized approach can improve outcomes;preoperative optimization after risk stratification and careful management are mandatory before *** techniques can also improve *** review the impact of LC on surgical outcome in non-hepatic abdominal surgeries required in this cirrhotic population before,during,and after surgery.

关键词： Liver cirrhosis Outcomes Coagulopathy Nutritional status Abdominal surgery Adaptive immune dysfunction Cirrhotic cardiomyopathy