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Plumbing System of Hunga Tonga Hunga Ha'apai Volcano

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Journal of Earth Science 2023年第3期34卷 706-716页

作者： román Alvarez Miguel Camacho Instituto de Investigaciones en Matemáticas Aplicadas y en Sistemas(IIMAS) Universidad Nacional Autónoma de MéxicoCoyoacán CDMX 04510Mexico Posgrado en Ciencias de la Tierra Universidad Nacional Autónoma de MéxicoCoyoacán CDMX 04510Mexico

The Hunga Tonga Hunga Ha’apai submarine volcano has experienced repeated eruptions in the latest *** recent one,in January 2022,released an enormous amount of energy inducing global perturbations,as tsunamis and atmospheric *** structure of the volcano is poorly understood,especially its internal ***-seated magmatic connections are difficult to define or *** use a high-resolution gravity data set obtained via satellite to calculate the Bouguer anomaly over its structure,to perform a preliminary exploration of its *** 3D gravity inversions,we find a complex plumbing system with various exhaust trajectories and multiple surface pockets of low-density material within the volcanic edifice;some appear to be associated with ring *** is in line with the report of the 2009 eruption,described as beginning from multiple *** found no signs of a magma chamber within 6 km depth,although several volcanic conduits are identified from such depth to the *** variations occur within a plumbing conduit or may vary from one conduit to another in the same *** models yield quantitative estimates for areas of magma-water interaction,constituting a baseline to compare with structural changes to be induced in future eruptions.

关键词： Hunga Tonga Hunga Ha'apai satellite gravity data 3D inversions volcano Tofua Island

Comorbidity in inflammatory bowel disease

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World Journal of Gastroenterology 2011年第22期17卷 2723-2733页

作者： Antonio López San román Fernando Muoz Gastroenterology Ramón y Cajal Hospital E28034 Madrid Spain Digestive Diseases Complejo Hospitalario Hospital Altos de Nava 24080 León Spain

Patients with inflammatory bowel disease (IBD) can be affected by other unrelated diseases. These are called comorbid conditions, and can include any secondary health problem that affects a person suffering from a primary or main disease, and which is neither linked physiopathologically to the primary condition, nor is it due to the treatments used for the primary condition or to its long-term anatomical or physiological consequences. Different comorbid conditions, as well as their influence on IBD, are discussed.

关键词： Comorbidity Comorbid conditions Crohn’ disease Inflammatory bowel disease Ulcerative colitis

Distributed Monitoring of Power System Oscillations Using Multiblock Principal Component Analysis and Higher-order Singular Value Decomposition

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Journal of Modern Power Systems and Clean Energy 2022年第4期10卷 818-828页

作者： Arturo román-Messina Alejandro Castillo-Tapia David A.román-García Marcos A.Hernández-Ortega Carlos A.Morales-Rergis Claudia M.Castro-Arvizu Center for Research and Advanced Studies(CInVESTAV)of the national Polytechnic Institute of Mexico GuadalajaraJal.45017Mexico Instituto Tecnológico y de Estudios Superiores de Monterrey GuadalajaraJal.45070Mexico Autonomous University of Guadalajara GuadalajaraJal.45129Mexico Centro de Enseñanza Técnica Industrial and he is also with UAGGuadalajaraJal.44638Mexico

The primary goal in the analysis of hierarchical distributed monitoring and control architectures is to study the spatiotemporal patterns of the interactions between areas or *** this paper,a novel conceptual framework for distributed monitoring of power system oscillations using multiblock principal component analysis(MB-PCA)and higher-order singular value decomposition(HOSVD)is proposed to understand,characterize,and visualize the global behavior of the power *** proposed framework can be used to evaluate the influence of a given area or utility on the oscillatory behavior,uncover low-dimensional structures from high-dimensional data,and analyze the effects of heterogeneous data on the modal characteristics and interpretation of power *** metrics are then investigated to examine the relationships between the dynamic patterns and participation of individual data blocks in the global behavior of the *** application of these techniques is demonstrated by case studies of two systems:a 14-machine test system and a 5449-bus 635-generator equivalent model of a large power system.

关键词： Distributed monitoring multiblock principal component analysis(MB-PCA) higher-order singular value decomposition(HOSVD) Tucker decomposition

Cardiogenic shock due to left main related myocardial infarction:is revascularization enough?

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Journal of Geriatric Cardiology 2022年第2期19卷 152-157页

作者： Francisco Galván-román Elena Puerto Roberto Martín-Asenjo Albert Ariza-Solé Department of Cardiology Bellvitge University Hospital.Grup de Malalties Cardiovasculars.Institut d´InvestigacióBiomèdica de Bellvitge(IDIBELL).L’Hospitalet de LlobregatBarcelonaSpain Department of Cardiology Doce de Octubre University Hospital.Instituto de Investigación Sanitaria Hospital 12 de Octubre(imas12).MadridSpain*The authors contributed equally to this manuscript

The incidence of cardiogenic shock(CS)complicating acute myocardial infarction(AMI-CS)remains between 3%and 10%and in-hospital mortality is hardly less than 30%.[1-3]In addition,the economic cost of caring for these patients is high.[4]Revascularization in the acute phase is the only measure that has demonstrated to modify the prognosis of AMI-CS.

关键词： infarction acute mortality

Use of geochemical fingerprints to trace sediment sources in an agricultural catchment of Argentina

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International Soil and Water Conservation Research 2020年第4期8卷 410-417页

作者： romina Torres Astorga Yanina Garcias Gisela Borgatello Hugo Velasco román Padilla Gerd Dercon Lionel Mabit IMASL UNSLCONICET.Ejde los Andes 950San LuisArgentina nuclear Science and Instrumentation Laboratory Division of Physical and Chemical SciencesIAEASeibersdorfAustria Soil and Water Management&Crop nutrition Laboratory Joint FAO/IAEA Division of Nuclear Techniques in Food and AgricultureSeibersdorfAustria

Soil erosion and associated sediment redistribution are key environmental problems in Central *** land uses and management practices,such as intensive grazing and crop cultivation,are considered to be significantly driving and accelerating these *** research focuses on the identification of suitable soil tracers from hot spots of land degradation and sediment fate in an agricultural catchment of central Argentina with erodible loess *** Energy Dispersive X-Ray Fluorescence(EDXRF),elemental concentrations were determined and later used as soil tracers for geochemical *** best set of tracers were identified using two artificial mixtures composed of known proportions of soil sources collected from different lands having contrasting soil ***,calcium,iron,phosphorus,and titanium were identified for obtaining the best suitable reconstruction of source proportions in the laboratory-prepared artificial ***,these elements,as well as the total organic carbon,were applied for pinpointing critical hot spots of erosion within the studied *** were identified to be the main source of sediments,river banks and dirt roads together are the second most important *** investigation provides key information for optimizing soil conservation strategies and selecting land management practices and land uses which do not generate great contribution of sediment,preventing pollution of the waterways of the region.

关键词： Fingerprinting Geochemical elements Energy dispersive X-ray fluorescence Soil erosion Mixing models

Identification of tree groups used by secondary cavity-nesting birds to simplify forest management in subtropical forests

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Journal of Forestry Research 2020年第4期31卷 1417-1424页

作者： Alejandro A.Schaaf román A.Ruggera Ever Tallei Constanza G.Vivanco Luis Rivera natalia Politi Instituto de Ecorregiones Andinas(InECOA) Universidad Nacional de Jujuy–Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET)Av.Bolivia 12394600 San Salvador de JujuyJujuyArgentina Fundación CEBio Roca 444600 San Salvador de JujuyJujuyArgentina

In tropical and subtropical forest ecosystems,cavities formed by decay processes are a key but scarce resource for birds that nest and roost in them,which makes them a highly sensitive group to *** piedmont forest of northwestern Argentina is a complex ecosystem with 113 tree and 120 bird *** has high logging pressure on the few,well-conserved forest remnants,complicating the delineation of sustainable management guidelines for each tree or bird species in a short *** objective was to reduce the complexity of subtropical forests by grouping tree species according to the characteristics used by secondary cavity-nesting birds(*** excavators).In the piedmont forest,50 plots of 0.25 ha were sampled to record cavity trees and cavity *** were then used in a cluster analysis to form tree ***,cavities were searched to identify the bird species using the decay-formed cavities.A total of 187 cavity trees,comprising 23 tree species,were recorded,and these formed four tree groups or *** recorded 86 cavities that were used by secondary cavitynesting bird *** four tree groups were unequally used by secondary cavity *** tree group that included valuable timber species(Myroxylon peruiferum,Anadenanthera colubrina and Calycophyllum multiflorum)and had the greatest cavity availability represented 71%of total cavity *** tree group with valuable timber species(Cedrela balansae and Amburana cearensis),measured>73 cm DBH and>21 m tall,had cavity entrances>0.10 cm2,and contributed 14%of all cavity use by birds.A third group had no highly economically valuable tree species,and included the snag category(*** dead trees)as well as a 15%of cavity *** fourth tree group had a DBHnly one highly economically valuable tree species(Cordia trichotoma),and supported no cavity *** clustering of subtropical trees can reduce the complexity of these forests,hence easing their management by

关键词： Biodiversity Cavity-nesting birds Conservation Logging

How does high-intensity intermittent training affect recreational endurance runners? Acute and chronic adaptations: A systematic review

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Journal of Sport and Health Science 2017年第1期6卷 54-67页

作者： Felipe García-Pinillos Víctor M.Soto-Hermoso Pedro A.Latorre-román Department of Corporal Expression University of Jaen Department of Sports Sciences University of Granada

Objective: This systematic review aimed to critically analyze the literature to determine how high-intensity intermittent training(HIIT) affects recreational endurance runners in the short-and ***: Electronic databases were searched for literature dating from January 2000 to October 2015. The search was conducted using the key words "high-intensity intermittent training" or "high-intensity interval exercise" or "interval running" or "sprint interval training" and "endurance runners" or "long distance runners". A systematic approach was used to evaluate the 783 articles identified for initial review. Studies were included if they investigated HIIT in recreational endurance runners. The methodological quality of the studies was evaluated using the Physiotherapy Evidence Database(PEDro) scale(for intervention studies) and the modified Downs and Black Quality Index(for cross-sectional studies).Results: Twenty-three studies met the inclusionary criteria for review. The results are presented in 2 parts: cross-sectional(n = 15) and intervention studies(n = 8). In the 15 cross-sectional studies selected, endurance runners performed at least 1 HIIT protocol, and the acute impact on physiological, neuromuscular, metabolic and/or biomechanical variables was assessed. Intervention studies lasted a minimum of 4 weeks, with 10 weeks being the longest intervention period, and included 2 to 4 HIIT sessions per week. Most of these studies combined HIIT sessions with continuous run(CR) sessions; 2 studies' subjects performed HIIT ***: HIIT-based running plans(2 to 3 HIIT sessions per week, combining HIIT and CR runs) show athletic performance improvements in endurance runners by improving maximal oxygen uptake and running economy along with muscular and metabolic adaptations. To maximize the adaptations to training, both HIIT and CR must be part of training programs for endurance runners.

关键词： Endurance High-intensity training Intermittent exercises Interval running Long-distance runners Running

Large dinosaur egg accumulations and their significance for understanding nesting behaviour

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Geoscience Frontiers 2024年第5期15卷 467-488页

作者： L.Ezquerro R.Coimbra B.Bauluz C.núñez-Lahuerta T.román-Berdiel M.Moreno-Azanza Departamento de Geodinámica Estratigrafía y PaleontologíaFacultad de Ciencias GeológicasUniversidad Complutense de MadridC/JoséAntonio Novais1228040MadridSpain Aragosaurus-IUCA:Recursos Geológicos y Paleoambientales.Departamento de Ciencias de la Tierra.Facultad de Ciencias Universidad de ZaragozaC/Pedro Cerbuna 1250009 ZaragozaSpain Museu da Lourinha LourinhaPortugal GeoBioTec Department of Earth SciencesNOVA School of Science and TechnologyUniversidade Nova de LisboaCaparicaPortugal GeoBioTec Departamento de GeocienciasUniversidade de AveiroAveiroPortugal Insitut Catalàde Paleoecologia Humana i EvolucióSocial(IPHES-CERCA) Zona Educacional 4Campus Sescelades URV(Edifici W3)43007 TarragonaSpain Departament d´Història i Història de l´Art Universitat Rovira i VirgiliAv.Catalunya 3543002 TarragonaSpain Geotransfer IUCA Departamento de Ciencias de La TierraFacultad de CienciasUniversidad de ZaragozaZaragozaSpain

The accurate identification of dinosaur egg accumulations as nests or clutches is crucial for understanding the reproductive behaviour of these extinct ***,existing methods often rely on the presence of complete eggs and embryo remains,and sedimentological criteria that are only applicable to well-structured *** this study,we introduce an innovative approach to characterize egg accumulations in structureless sediments,where traditional nest structures may not be *** methodology employs a unique combination of sedimentological,taphonomic,geochemical,and geophysical proxies for the study of egg *** applied this approach to the egg accumulation from Paimogo(Jurassic,Portugal),traditionally interpreted as a *** findings reveal that the Paimogo egg assemblage is a secondary deposit,resulting from a flooding event in a fluvial plain that dismantled several allosauroid and crocodylomorph *** eggshell vapor conductance results,coupled with sedimentological evidence,suggest that allosauroid dinosaurs buried their eggs in the dry terrain of overbank areas close to a main channel during the breeding season,likely during the dry season to prevent the embryos from *** research underscores the necessity of multidisciplinary approaches in interpreting egg accumulations and offers a novel methodology for studying these accumulations in structureless *** findings provide new insights into the breeding behaviour and nesting preferences of these extinct organisms,contributing to our understanding of dinosaur ecology.

关键词： Breeding behaviour Theropod Taphonomy Stable isotopes Magnetic susceptibility Jurassic

Redefinition of the Terminus of the Middle America Trench

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International Journal of Geosciences 2013年第4期4卷 766-776页

作者： román Alvarez Instituto de Investigaciones en Matemáticas Aplicadas y en Sistemas Universidad Nacional Autónoma de México Ciudad Universitaria México DF México

The terminus of the Middle America Trench has been traditionally represented as an arc, concave towards the continent. Tres Marías Islands are located at the terminus of the Middle America Trench in western Mexico, and their location is not only intriguing but also a key to the re-construction of the position of Baja California peninsula before separation from the north America plate. Previous re-constructions suggested various places around the location of Tres Marías Islands for the position of the tip of the peninsula, and several converge to a position that invades the area occupied by the islands, offering no explanation for the overlap. Before peninsular separation from north America, the Guadalupe trench followed a smooth curve;recreating the position of this paleo-trench yields a baseline for fixing the position of the peninsula, as well as the original position of the Tres Marías Islands fragment. A new tectonic view of the structure of the Middle America Trench terminus is proposed, replacing the traditional arc representation with a series of en echelon blocks, the northernmost terminates at the Tres Marías Escarpment. The long sides of the blocks correspond to previously identified geological faults in the Bahía de Banderas region, while their offshore continuation is supported by topographic observations. As a test of this model I show the corresponding re-construction of the position of Baja California prior to separation from the north America plate and the positional evolution of the peninsula and the Tres Marías fragment from Chron 4n.2 (7.90 Ma) to Chron 3n.4 (5.12 Ma).

关键词： Middle America Trench Tres Marías Islands Guadalupe Trench MAT Terminus Banderas Fault