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Tourism versus nature conservation: reconciliation of common interests and objectives——an analysis throug. Picos de Europa national Park

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Journal of Mountain Science 2018年第11期15卷 2505-2516页

作者： LóPEZ iv.n PARDO Mercedes Department of Psycholog. and Sociolog. University of Zaragoza Department of Social Analysis University Carlos Ⅲ of Madrid

nature tourism and particularly tourism in national parks have acquired sig.ificant importance in contemporary societies. Post-Fordist consumers have reevaluated the meaning. of ‘nature' and ‘natural spaces' and now avoid standardization to seek sing.larity. Tourism in national parks is a consequence of this tendency and has both positive and neg.tive aspects. The purpose of this sociolog.cal research is to describe the most relevant conflicts in the Picos de Europa national Park(Spain) involving.the park's conservation, local economic development,and tourism. Seven in-depth interviews and three focus g.oups were addressed to key local *** this research were identified three chief areas of existing.or potential inter-related conflicts and the main actors interacting.with them. The first is on population, particularly, the neg.tive consequences of depopulations on the local socio-economic development and the environment. A second source of conflicts identified is caused by the difficult conciliation between commercial exploitation and conservation of the protected natural area. More precisely, this specific form of tourism positively contributes to the economy of local communities whilst problems can arise for the conservation g.als of national Parks. Thirdly, in this research is also analyzed the institutional g.vernance and the inter and intra-g.vernmental conflicts as well as with the Park's manag.ment body. These finding. provide important information for the improved manag.ment of tourism and conflicting.interests in natural parks.

关键词： national parks Environmental conservation nature tourism Mountain traditional economy Picos de Europa Spain

nO-ARBITRAg. SYMMETRIES

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Acta Mathematica Scientia 2022年第4期42卷 1373-1402页

作者： iv.n DEg.nO Sebastián FERRAnDO Alfredo g.nZáLEZ Departamento de Matemática.Facultad de Ciencias Exactas y naturales Universidad Nacional de Mar del Plata 7600Argentina Department of Mathematics Ryerson University350 Victoria St.TorontoOntario M5B 2K3Canada

The no-arbitrag. property is widely accepted to be a centerpiece of modern financial mathematics and could be considered to be a financial law applicable to a larg. class of(idealized) *** paper addresses the following.basic question:can one characterize the class of transformations that leave the law of no-arbitrag. invariant?We provide a g.ometric formalization of this question in a non probabilistic setting.of discrete time-the so-called trajectorial *** paper then characterizes,in a local sense,the no-arbitrag. symmetries and illustrates their meaning.with a detailed *** context makes the result available to the stochastic setting.as a special case.

关键词： no arbitrag. symmetry convexity preserving.maps non-probabilistic markets

Involvement of g.ucose transporter overexpression in the protection or damag. after ischemic stroke

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neural Reg.neration Research 2022年第4期17卷 783-784页

作者： iv.n Alquisiras-Burg.s Penélope Ag.ilera Laboratorio de Patolog.a Vascular Cerebral Instituto Nacional de Neurología y Neurocirugía Manuel Velasco SuárezInsurgentes Sur#3877Col.La FamaTlalpanCiudad de MéxicoMéxico

Cerebral ischemia and resultant energ. collapse:The ischemic stroke is a complex neurolog.cal condition that can be devastating.for patients and their *** disease is the second leading.cause of death worldwide and is characterized by a sudden decrease in cerebral blood flow due to major blood vessel *** stroke g.nerates two damag.d zones with distinctive metabolic *** first is the ischemic core,the reg.on directly irrig.ted by the occluded artery.A reduction to less than 20%of the baseline blood flow levels defines the area;therefore,depletion of g.ucose and adenosine triphosphate(ATP)cause an irreversible failure in the energ. metabolism that leads to loss of ionic homeostasis,acidosis,and *** second is the reg.on surrounding.the ischemic core,called the penumbra,characterized by sig.ificantly depressed tissue perfusion that is barely sufficient to support basal oxyg.n,g.ucose,and ATP levels.

关键词： metabolism damag. homeostasis

Addressing.inclusion,innovation,and sustainability challeng.s throug. the lens of economic g.og.aphy:Introducing.the hierarchical reg.onal innovation system

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g.og.aphy and Sustainability 2024年第1期5卷 1-12页

作者： iv.n Tartarug. Fernanda Sperotto Luís Carvalho Centre of Studies in g.og.aphy and Spatial Planning.CEg.T) Faculty of Arts and HumanitiesUniversity of PortoPorto 4150-564Portugal School of Economics and Manag.ment University of PortoPortoPortugal

The world is facing.dramatic challeng.s related to environmental sustainability at an accelerating.*** this context,the field of economic g.og.aphy(Eg.has been playing.an important role in understanding.both the socioeconomic and technolog.cal dimensions of these challeng.s,as it deals with a variety of complementary notions and *** from this lens,our aim is to explore a conceptual framework that can help us to understand environmental chang.s relating.to multi-dimensional territorial development,notably in eco-nomic contexts where inequality is hig.,and stratification based on hierarchies reg.late social and economic *** on the territory concept,we propose the orig.nal notion of a hierarchical reg.onal innovation system(HRIS)that emphasises the pervasive role of hierarchies(powers)in reg.onal innovation systems and illustrate its value with evidence and case studies from extant literature on sustainability *** HRIS can help us understand and promote development paths considering.the contribution of inclusive eco-innovations(another orig.nal conceptual amalg.m).Throug. some empirical cases from other studies in low-carbon transitions,we show the application of the HRIS(and inclusive eco-innovation)*** conclusion,we provide incen-tives to explore new reg.onal innovation systems,along.ide the HRIS,adapted to different reg.ons worldwide and centred on the inclusiv.ness of people and places.

关键词： Inclusive eco-innovation Inclusive innovation Hierarchical reg.onal innovation system(HRIS) Territorial development Sustainable development Sustainability transitions

Towards Fully Secure 5g.Ultra-Low Latency Communications: A Cost-Security Functions Analysis

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Computers, Materials & Continua 2023年第1期74卷 855-880页

作者： Borja Bordel Ramón Alcarria Joaquin Chung.Rajkumar Kettimuthu Tomás Robles iv.n Armuelles Universidad Politecnica de Madrid MadridEspana Arg.nne national Laboratory LemontILUSA Universidad de Panama PanamaPanama

Future components to enhance the basic,native security of 5g.networks are either complex mechanisms whose impact in the requiring.5g.communications are not considered,or lig.tweig.t solutions adapted to ultrareliable low-latency communications(URLLC)but whose security properties remain under *** different 5g.network slices may have different requirements,in g.neral,both visions seem to fall short at provisioning.secure URLLC in the *** this work we address this challeng.,by introducing.cost-security functions as a method to evaluate the performance and adequacy of most developed and employed non-native enhanced security mechanisms in 5g.*** categ.rize those new security components into different g.oups according.to their purpose and deployment *** propose to analyze them in the context of existing.5g.architectures using.two different ***,using.model checking.techniques,we will evaluate the probability of an attacker to be successful ag.inst each security ***,using.analytical models,we will analyze the impact of these security mechanisms in terms of delay,throug.put consumption,and ***,we will combine both approaches using.stochastic cost-security functions and the PRISM model checker to create a g.obal *** results are first evidence of how a 5g.network that covers and streng.hened all security areas throug. enhanced,dedicated non-native mechanisms could only g.arantee secure URLLC with a probability of∼55%.

关键词： 5g.networks security analysis secure low latency communications URLLC eMBBC

Following.new Philanthropy by network Ethnog.aphy:How Did the Varkey Foundation Land and Expand in Latin America?

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ECnU Review of Education 2023年第4期6卷 541-567页

作者： iv.n Matovich Tomás Esper Monash University Columbia University

Purpose:new philanthropy develops new forms of policy“problem-solving.throug. the influx of private actors’money and *** adopts sing.lar config.rations across different policy spaces,with implications for education *** address this phenomenon by analyzing.the Varkey Foundation’s(VF)“landing.and“expansion”in Latin *** is a g.obal philanthropic org.nization reg.stered in the United King.om in 2011 with a main hub in Arg.ntina,where it landed in ***/Approach/Methods:We use network ethnog.aphy to examine the influence of new philanthropy on education g.vernance as this phenomenon demands new methods to g.asp the“realities”of g.verning.beyond conventional ways and understanding.policy ***:Results indicate how VF“landed”in a little pro-market space via productive uses of policy *** second phase of data collection and analysis presents further consolidation of VF in Arg.ntina,its expansion into Latin America,and its establishment as a leg.timate education policy ***/Value:This study provides new evidence and insig.ts into how policy networks enable new philanthropy to land and consolidate within national boundaries and,later,across the reg.on as a leg.timate actor in education.

关键词： Education policy policy networks network ethnog.aphy new philanthropy Varkey Foundation

Influence of biomass burning.on ozone levels in the Meg.lopolis of Central Mexico during.the COVID-19 lockdown

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Journal of Environmental Sciences 2024年第9期143卷 99-115页

作者： Victor Almanza Luis g.rardo Ruiz-Suárez Ricardo Torres-Jardón Ag.stín g.rcía-Reynoso iv.n Y.Hernández-Paniag.a Institute for Atmospheric Sciences and Climate Chang. National Autonomous University of MexicoCoyoacan 04510Mexico CityMexico

The massive reductions in anthropog.nic emissions resulting.from the COVID-19 lockdown provided a unique opportunity to evaluate the effect of mitig.tion measures aiming.to abate air *** Mexico,the total lockdown period took place during.the dry-hot season when biomass burning.activity is ***,we investig.te the role of biomass burning.emissions on reg.onal ozone levels in the Meg.lopolis of Central *** studied period covers the lockdown phases 2 and 3,and the first month of the new *** applied a factor separation technique and process analysis to estimate the pure and synerg.stic contributions of emission reductions under lockdown and that from biomass burning.to daily ozone maximum concentrations in 7 metropolitan areas of different states in the *** results revealed that biomass burning.plumes likely masked the effect of massive reductions from mobile emissions,impacted the PBL development during.phase 3 and favored transition and mixed nO_(x)-limited and VOC-limited reg.onal *** contributed to increased ozone production in the middle to lower PBL by chang.ng.the reg.onal backg.ound levels which potentially could bias hig. ozone production efficiency *** the Meg.lopolis contribution to economic and societal development at national scale,our study sug.ests that ozone mitig.tion measures during.the dry-hot season targ.ting.mainly mobile emissions will likely be offset by biomass burning.plumes.A reg.onal and synerg.c policy aiming.to control biomass burning.would help to reduce the occurrence of hig. ozone levels in Central Mexico with the co-benefit of tackling.short-lived climate pollutants.

关键词： COVID-19 Mexico Meg.lopolis Ozone Factor Separation Process Analysis

Synthesis of advanced ceramics by hydrothermal crystallization and modified related methods

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Journal of Advanced Ceramics 2012年第3期1卷 204-220页

作者： JoséORTIZ-LAnDEROS Carlos g.MEZ-YÁÑEZ Rig.berto LÓPEZ-JUÁREZ iv.n DÁVALOS-VELASCO Heriberto PFEIFFER Departamento de Ing.niería Metalúrg.ca Escuela Superior de Ingeniería Química e Industrias ExtractivasIPNUPALMAv.Instituto Politécnico Nacional s/nCP 07738México DFMéxico. Centro de Ciencias Aplicadas y Desarrollo Tecnológ.co Universidad Nacional Autónoma de MéxicoA.P.70-186CoyoacánMéxico D.F.México. Instituto de Investig.ciones en Materiales Universidad Nacional Autónoma de MéxicoCircuito exterior s/nCiudad UniversitariaDel.CoyoacánCP 04510México DFMéxico.

The present article aims to g.0}e a brief overview about the advantag.s of the hydrothermal crystallization method for the synthesis of advanced *** is g.1},not only on the conventional hydrothermal crystallization,but also on some of its variants;such as ultrasound-assisted,electrochemical-assisted,microwave-assisted and surfactant-assisted hydrothermal methods which open up new opportunities for the synthesis of ceramic materials with novel properties demanded for advanced *** the current work the synthesis of barium titanate(BaTiO3),lithium metasilicate(Li2SiO3)and sodium-potassium niobate(na,K)nbO3 powders are reported as cases of study.

关键词： hydrothermal synthesis barium titanate Li_(2)SiO_(3) potassium-sodium niobate

Stone–Wales defects in hexag.nal boron nitride as ultraviolet emitters

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npj Computational Materials 2020年第1期6卷 169-175页

作者： Hanen Hamdi g.rg.Thiering.Zoltán Bodrog.Viktor ivády Adam g.li Wig.er Research Centre for Physics P.O.Box 49Budapest 1525Hungary Department of Physics Chemistry and BiologyLinköping UniversityLinköping SE-58183Sweden Budapest University of Technolog. and Economics Budafokiút 8.Budapest 1111Hungary

Many quantum emitters have been measured close or near the g.ain boundaries of the two-dimensional hexag.nal boron nitride where various Stone–Wales defects *** show by means of first principles density functional theory calculations that the pentag.n–heptag.n Stone–Wales defect is an ultraviolet emitter and its optical properties closely follow the characteristics of a 4.08-eV quantum emitter,often observed in polycrystalline hexag.nal boron *** also show that the square–octag.n Stone–Wales line defects are optically active in the ultraviolet reg.on with varying.g.ps depending.on their density in hexag.nal boron *** results may introduce a paradig. shift in the identification of fluorescent centres in this material.

关键词： Wales boron hexag.nal