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Driving factors behind multiple populations

Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 172-181页

作者： Ruoyun Huang Baitian Tang Chengyuan Li Doug Geisler mario Mateo Ying-Yi Song Holger Baumgardt Julio A.Carballo-Bello Yue Wang Jundan Nie Bruno Dias JoséG.Fernández-Trincado School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China CSST Science Center for the Guangdong-Hong Kong-Macao Greater Bay Area Zhuhai 519082China Departamento de Astronomía Universidad de ConcepcionConcepcionChile Instituto de Investigación Multidisciplinario en Ciencia y Tecnología Universidad de La SerenaLa SerenaChile Departamento de Astronomía Facultad de CienciasUniversidad de La SerenaChile Department of Astronomy University of MichiganAnn Arbor 48109USA David A.Dunlap Department of Astronomy&Astrophysics University of TorontoToronto ON M5S 3H4Canada Dunlap Institute for Astronomy&Astrophysics University of TorontoToronto ON M5S 3H4Canada School of Mathematics and Physics The University of QueenslandSt.Lucia QLD 4072Australia Instituto de Alta Investigación Universidad de TarapacáAricaChile CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Instituto de Astrofísica Departamento de Ciencias FísicasFacultad de Ciencias ExactasUniversidad Andres BelloSantiagoChile Instituto de Astronomía Universidad Católica del NorteAntofagastaChile

Star clusters were historically considered simple stellar populations,with all stars sharing the same age and initial chemical ***,the presence of chemical anomalies in globular clusters(GCs),called multiple stellar populations(MPs),has challenged star formation theories in dense *** studies show that mass,metallicity,and age are likely controlling parameters for the manifestation of *** the limit between clusters with/without MPs in physical parameter space is crucial to reveal the driving mechanism behind their *** this study,we look for MP signals in Whiting 1,which is traditionally considered a young *** the Magellan telescope,we obtained low-resolution spectra withinλλ=3850-5500?for eight giants of Whiting *** measured the C and N abundances from the CN and CH spectral indices.C and N abundances have variations comparable with their measurement errors(~0.1 dex),suggesting that MPs are absent from Whiting *** these findings with literature studies,we propose a limit in the metallicity *** compactness index parameter space,which relatively clearly separates star clusters with/without MPs(GCs/open clusters).This limit is physically *** a larger scale,the galactic environment determines cluster compactness and metallicity,leading to metal-rich,diffuse,old clusters formed ex *** proposed limit also impacts our understanding of the formation of the Sagittarius dwarf galaxy:star clusters formed after the first starburst(age≤8-10 Gyr).These clusters are simple stellar populations because the enriched galactic environment is no longer suitable for MP formation.

关键词： stellar galactic galaxy

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The Effect of Brain Gym on Global Cognitive Function of Institutionalized Older People

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International Journal of Mental Health Promotion 2022年第3期24卷 375-383页

作者： Araceli Cano-Estrada Araceli Jimenez-Mendoza Denny Contreras-Guerrero mario Hernandes-Alejandro andres Salas-Casas Escuela Superior de Tlahuelilpan Universidad Autónoma del Estado de HidalgoTlahuelilpanHidalgoMéxico Escuela Nacional de Enfermería y Obstetricia.Universidad Nacional Autónoma de México Mexico CityMéxico Departomento de Bioingenieria Unidad Profesional Interdisciplinaria de Biotecnología del Instituto Politecnico Nacional(UPIBIIPN)Mexico CityMexico Instituto de Ciencias de la Salud.Universidad Autónoma del Estado de Hidalgo.Pachuca Hidalgo.México.Scuela Superior de TlahuelilpanUniversidad Autónoma del Estado de HidalgoTlahuelilpanHidalgoMéxico

Cognitive function of older adults is influenced by several factors such as age,sex,education,and physical activity so that it can impact the decrease in progressive cognitive *** is necessary to implement cognitive training in old people’s care to prevent or delay the onset of age-related cognitive *** gym is a series of simple motion exercises and is an alternative therapy that stimulates the *** study aims to evaluate the effect of brain gym as a cognitive training intervention on global cognitive functioning of institutionalized older *** study is a non-randomized quasi-experimental one using pre-and post-test control group *** participants of the study were 65 years old or older who had been part of gerontological centers from a local *** were divided into two groups:control and intervention,each one with 15 ***-Mental State Examination was applied to the sample before and after the cognitive *** brain gym training consists of bi-weekly group meeting for 12 weeks,lasting 50 min *** treated group had a significantly better global cognitive ***(memory),orientation and language skills were the domains with the most significant changes(p<0.05).On the other hand,no significant changes were found in the participants of control groups during post *** results suggest that cognitive training based in brain gym improves global cognitive function of institutionalized older people lease type your abstract *** of a research paper is typically 200 to 400 words in length,and 150 to 300 words for a review *** shall be running continuously(not structured)and shall not include reference *** that appear only once in the abstract should be defined in *** abbreviations appear more than once,the full definitions should be provided first before they can be used elsewhere.

关键词： Cognitive function brain gymnastic older people gerontological center physical activity

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在有分散的胃的息肉的病人的 colorectal 息肉的风险: 盒子控制研究

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World Journal of Gastrointestinal Endoscopy 2013年第5期5卷 240-245页

作者： Daniel Gustavo Cimmino José Manuel Mella Pablo Luna Raquel González Lisandro Pereyra Carolina Fischer Adriana Mohaidle Beatriz Vizcaino mario andres medrano Adrián Hadad Silvia Pedreira Luis Boerr Digestive Endoscopy and Gastroenterology Units Internal Medicine DepartmentHospital AlemánBuenos AiresCP 1118Argentina

AIM:To assess the risk of colonic polyps,adenomas and advanced neoplastic lesions(ANL) in patients with sporadic gastric polyps,especially those with fundic gland polyps(FGP).METHODS:Clinical records of patients who had performed an upper and a lower digestive endoscopy between September 2007 and August 2008 were retrospectively analyzed.A case-control study was carried out,calling patients with gastric polyps as 'cases' and patients without gastric polyps as 'controls'.The risk of colonic polyps,adenomas and ANL(villous component ≥ 25%,size ≥ 10 mm,or high grade dysplasia) was assessed [odds ratio(OR) and its corresponding 95%CI].RESULTS:Two hundred and forty seven patients were analyzed:78 with gastric polyps(cases) and 169 without gastric polyps(controls).Among the cases,the majority of gastric polyps were FGP(80%,CI:69-88) and hyperplastic(20%,CI:12-31);25% had colonic polyps(25% hyperplastic and 68% adenomas,from which 45% were ANL).Among the controls,20% had colonic polyps(31% hyperplastic and 63% adenomas,from which 41% were ANL).The patients with sporadic FGP had an OR of 1.56(CI:0.80-3.04) for colonic polyps,an OR of 1.78(CI:0.82-3.84) for colonic adenomas,and an OR of 0.80(CI:0.21-2.98) for *** results were found in patients with gastric polyps in ***:The results of this study did not show more risk of colorectal adenomas or ANL neither in patients with sporadic gastric polyps nor in those with FGP.

关键词： Colorectal polyps Advanced neoplastic lesions Gastric polyps Fundic gland polyps gastric polyps Case-control study

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Rupture area analysis of the Ecuador (Musine) Mw = 7.8 thrust earthquake on April 16, 2016, using GOCE derived gradients

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Geodesy and Geodynamics 2017年第1期8卷 49-58页

作者： Orlando Alvarez andres Folguera mario Gimenez lnstituto Geofisico y Sismologico lng Volponi Universidad Nacional de San Juan Argentina Consejo Nacional de Investigaciones Cientificas y Tecnicas Argentina indean-instituto de Estudios Andinos "Don Pablo Groeber" Departamento de Cs. Geologicas FCEN Universidad de Buenos Aires Argentina

The Ecuador Mw - 7.8 earthquake on April 16, 2016, ruptured a nearly 200 km long zone along the plate interface between Nazca and South American plates which is coincident with a seismic gap since 1942, when a Mw - 7.8 earthquake happened. This earthquake occurred at a margin characterized by moderately big to giant earthquakes such as the 1906 （Mw 8.8）. A heavily sedimented trench explains the abnormal lengths of the rupture zones in this system as inhibits the role of natural barriers on the propagation of rupture zones. High amount of sediment thickness is associated with tropical climates, high erosion rates and eastward Pacific dominant winds that provoke orographic rainfalls over the Pacific slope of the Ecuatorian Andes. Offshore sediment dispersion off the oceanic trench is controlled by a close arrangement of two aseismic ridges that hit the Costa Rico and South Ecuador margin respectively and a mid ocean ridge that separates the Cocos and Nazca plate trapping sediments. Gravity field and Ocean Circulation Explorer （GOCE） satellite data are used in this work to test the possible relationship between gravity signal and earthquake rupture structure as well as registered aftershock seismic activity. Reduced vertical gravity gradient shows a good correlation with rupture structure for certain degrees of the harmonic expansion and related depth of the causative mass; indicating, such as in other analyzed cases along the subduction margin, that fore-arc structure derived from density heterogeneities explains at a certain extent propagation of the rupture zones. In this analysis the rupture zone of the April 2016 Ecuador earthquake developed through a relatively low density zone of the fore-arc sliver. Finally, aftershock sequence nucleated around the area of maximum slips in the rupture zone, suggesting that heterogeneous density structure of the fore-arc determined from gravity data could be used in forecasting potential damaged zones associated with big rupture

关键词： Gravity field and Ocean Circulation Explorer(GOCE)Vertical gravity gradientEcuador earthquakeTrench sedimentsRupture zone

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Active disturbance rejection control of nonlinear SISO Lagrangian systems via endogenous injections and exogenous feedback for trajectory tracking

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Control Theory and Technology 2021年第1期19卷 113-126页

作者： Hebertt Sira-Ramírez mario andres Aguilar-Orduña Brian C.Góm ez-León Department of Electrical Engineering Mechatronics Section Cinvestav-IPNAv.IPN No.2508Col.San Pedro ZacatencoCP 07300 CDMX.Mexico

This article deals with a linear classical approach for the robust output reference trajectory tracking control of nonlinear SISO Lagrangian systems with a controllable(fAat)tangent linearization around an operating equilibrium *** endogenous injections and exogenous feedback(EIEF)approach is proposed,which is naturally equivalent to the generalized propor-tional integral control method and to a robust classical compensation *** is shown that the EIEF controller is also equivalent,within a frequency domain setting demanding respect for the separation principle,to the reduced order observer based active disturbance rejection control *** proposed linear control approach is robust with respect to total dis-turbances and,thus,it is ffective for the linear control of the nonlinear Lagrangian *** ilustrative nonlinear rotary crane Lagrangian system example,which is non-feedback linearizable,is presented along with digital computer simulations.

关键词： Active disturbance rejection control Lagrangian systems Robust control Flatness in Lagrangian systems

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Payenia Quaternary flood basalts(southern Mendoza, Argentina)：Geophysical constraints on their volume

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Geoscience Frontiers 2016年第5期7卷 775-782页

作者： Mauro G.Spagnuolo Darío L.Orts mario Gimenez andres Folguera Victor A.Ramos Instituto de Estudios Andinos Don Pablo Groeber (I DEAN) UBA-CONICET Argentina Instituto de Investigacion en Paleobiologia y Geologia Universidad Nacional de Rio Negro - CONICET Argentina Instituto Geofisico y Sismologico Ing. Volponi Universidad Nacional de San Juan. CONICET Argentina

The Quaternary volcanic province of Payenia is located in southern Mendoza and northern Neuquén provinces of Argentina and is characterized by a dominant basaltic composition. The volcanic province covers an area larger than 40,000 km2 and its origin and evolution has been the center of several *** this study we analyzed gravity data together with more accurate volcanic volumes calculations in order to investigate the subsurface structure of the Payenia volcanic province. The volume of material was calculated using digital elevation models and geographic information system（GIS） techniques to estimate the volume of material erupted and then, with those values, make an estimation of the intrusive material that could be located within the crust. The results of the calculations were compared with different 2D-sections constructed to model the gravity data and compare with the observed satellite gravity. After evaluating different models which have been generated to match both： the observed gravity data and the subsurface material calculated, we discuss those that best fit with observation. The results clearly indicate that the lithosphere is attenuated below the region.

关键词： Payenia Gravimetric model Plume Uplift Andes

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The subduction of the Copiapó aseismic ridge,is the causing of the formation of metallic minerals deposits in north of Chile and Argentina?

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Geodesy and Geodynamics 2019年第6期10卷 471-476页

作者： mario Gimenez Gemma Acosta Orlando Alvarez Agustina Pesce Federico Lince Kinger andres Folguera Instituto Geofisico Sismologico Volponi FCEFNUniversidad Nacional de San JuanCONICETRuta 12 Marguesado(Jardin de Los Poetas)RiνadaviaSanJuanArgentina IDEAN-CONICET Universidad de Buenos Aires Argentina

The results obtained in this work evince that the metallic mineral deposits located in the northern region of the Chilean-Pampean flat slab(in northern Chile and north-western Argentina),at approximately 27°30’S,would be related to the subduction of the Copiapo aseismic *** analysis of the gravity anomalies and vertical gravity gradient allows inferring a deflection and truncation of the main trend of the Andean structures at the extrapolated zone of the Copiapo ridge beneath South ***,the general NNE-trend of the Andean structures are rotated locally to an ENE-strike within the area of the Ojos del Salado-San Buena Ventura *** explain that this anomalous behavior of the gravity derived anomalies is related to the deformational effects imprinted by the ridge *** with a low subduction angle(<30° to horizontal)are related to large mineralization due to fluids released by dehydration of the subducting *** addition,a higher degree of mantle melting could be produced by a thicker oceanic ***,we interpret that the processes associated to the subduction of the Copiapo aseismic ridge(emplaced on a thickened oceanic crust due to a local compensation of the seamounts)are the cause of formation and emplacement of big metallic mineral deposits in this region of Chile and Argentina.

关键词： Aseismic ridge Satellite gravity Ojos del Salado-San Buena Ventura lineament Metallic mineral deposits

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Synthesis of Nd1-xCaxCoO3 Perovskite Nanowires for Thermoelectric Applications

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Journal of Electrical Engineering 2014年第2期2卷 59-64页

作者： mario Culebras Clara M. Gomez andres Gomez Femando Sapina andres Cantarero Institute of Materials Science University of Valencia Valencia 46071 Spain

Perovskite materials are great candidates for thermoelectric applications because they have a large Seebeck coefficient, low production costs and high chemical stability at high temperatures. Nanostructuration, especially with nanowire shape, can be the key to develop high efficient thermoelectric materials. In this work, Nd 1?x Ca x CoO 3 perosvkite nanowires, with Ca as a dopant, have been synthesized by the hydrothermal method with the purpose of using them in thermoelectric applications at room temperature. The best thermoelectric efficiency has been obtained for a Ca content of x = 0.2. The electrical conductivity and Seebeck coefficient are strongly related to the calcium content, while the thermal conductivity (0.3 W·m -1 ·K -1 ) is clearly lower than that of bulk materials.

关键词：电气控制控制理论电气测量集中参数

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Agronomic assessment of two populations of intermediate wheatgrass—Kernza^(®)(Thinopyrum intermedium)in temperate South America

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Grassland Research 2022年第4期1卷 262-278页

作者： andres Locatelli Lucia Gutierrez Olivier Duchene Pablo R.Speranza Valentin D.Picasso Risso Polo agro-alimentario Centro Universitario Litoral NorteEstacion Experimental Mario Antonio CassinoniUniversidad de la RepúblicaPaysanduUruguay Departamento de Producción Vegetal Facultad de AgronomiaUniversidad de la RepúblicaPaysanduUruguay Departamento de Biometría Estadística y ComputaciónFacultad de AgronomíaUniversidad de la RepúblicaMontevideoUruguay Department of Agronomy University of Wisconsin–MadisonMadisonWisconsinUSA Agroecology and Environment Research Unit ISARALyonFrance Departamento de Biología Vegetal Facultad de AgronomiaUniversidad de la RepúblicaMontevideoUruguay Departamento de Producción Animal y Pasturas Facultad de AgronomiaUniversidad de la RepúblicaMontevideoUruguay

Background Kernza®intermediate wheatgrass is a perennial grain and forage crop that can provide several ecosystem *** research efforts focused on Kernza have taken place in high *** goal of this study was to evaluate,for the first time,the agronomic performance of Kernza in a low-latitude region with mild *** A KS-cycle 4 Kernza population(A)was planted in spring in Wisconsin,USA,and selected in one cycle for lower vernalization requirements,obtaining a new population(B).These two populations,at three nitrogen(N)fertilization rates,were evaluated in a full factorial,completely randomized field experiment in Uruguay over 2 *** The populations were similar in grain yields and flowering time in the 1st year,but population B had 63%lower grain yield in the 2nd year and 20%lower forage yield throughout the *** the N rate to 160 kg ha−1 led to a 63%increase in grain yield and 28%increase in forage yield across *** yields and nutritive values were similar to those reported in the northern ***,grain yields for both the 1st(316 kg ha−1)and 2nd year(41 kg ha−1)were lower due to reduced flowering and weed *** Expansion of Kernza to lower-latitude regions will require further breeding to improve reproductive performance.

关键词： low-latitude regions nitrogen fertilization rates perennial grains Thinopyrum intermedium vernalization requirements

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Textbook of Hepatology: From Basic Science to Clinical Practice, Third Edition 3

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2007年

作者： Juan Rodés MD Jean‐Pierre Benhamou MD andres T. Blei MD Jürg Reichen MD mario Rizzetto MD

ISBN: (数字)9780470691861

ISBN: (纸本)9781405127417

THE encyclopedic guide to hepatology – for consultation by clinicians and basic scientists Previously the Oxford Textbook of Clinical Hepatology , this two-volume textbook is now with Blackwell Publishing. It covers basic, clinical and translational science (converting basic science discoveries into the practical applications to benefit people). Edited by ten leading experts in the liver and biliary tract and their diseases, along with outstanding contributions from over 200 international clinicians, this text has global references, evidence and extensive subject matter – giving you the best science and clinical practice discussed by the best authors. It includes unique sections on: Symptoms and signs in liver disease Industrial diseases affecting the liver The effects of diseases of other systems on the liver The effects of liver diseases on other systems It's bigger and more extensive than other books and discusses new areas in more depth such as stem cells, genetics, genomics, proteomics, transplantation, mathematics and much more. Plus, it comes with a fully searchable CD ROM of the entire content. Click here to view a sample chapter on the liver and coagulation

关键词： LiverDiseases.

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