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Particuology 2017年第4期15卷 129-137页

作者： carlos m. romero luna Luis R. Carrocci Gretta L.A.F. Arce Ivonete Avila UNESP - Sflo Paulo State University School of Engineering Department of Energy Laboratory of Combustion and Carbon Capture (LC3) CEP 12.516-410 Guaratinguetd SP Brazil INPE - Brazilian Space Research Institute Combustion and Propulsion Associated I.aboratory CEP 12.630-000 Cachoeira Paulista SP Brazil UNJFSC -Jose Faustino Sanchez Carrion National University Faculty of Chemical and Metallurgical Engineering Advanced Materials and Nanotechnology Research Group Huacho Lima Peru

In sim.lations of fluidized beds using com.utational fluid dynam.cs （CFD）, the description of gas-solid flow hydrodynam.cs relies on a drag m.del to account for the m.m.ntum.transfer between gas and solid phases. Although several studies of drag m.dels have been published, there have been few investigations of the application of lattice Boltzm.nn m.thod （LBm.-based drag m.dels to bubbling fluidized bed sim.- lations. In the present study, a com.rehensive com.arison of em.irical and LBm.based drag m.dels was carried out to assess the perform.nce of these m.dels during sim.lations of gas-solid flow hydrodynam. ics in a bubbling fluidized bed. A CFD m.del using the m.IX code based on the Eulerian-Eulerian approach and the kinetic theory of granular flow was used to sim.late a 2D bubbling fluidized bed with Geldart B particles. The sim.lation results were validated by com.arison with experim.ntal data. Statistical anal- ysis of the results shows that LBm.based drag m.dels can reliably m.del gas-solid flow hydrodynam.cs in a bubbling fluidized bed.

关键词： CFD Drag m.del Gas-solid flow hydrodynam.cs Bubbling fluidized bed

Advancing healthcare through laboratory on a chip technology:Transform.ng m.croorganism.identification and diagnostics

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World Journal of Clinical Cases 2025年第3期13卷 9-19页

作者： carlos m.Ardila Departm.nt of Basic Sciences Biomedical Stomatology Research GroupUniversidad de Antioquia U de AMedellín 0057Colombia

In a recent case report in the World Journal of Clinical Cases,em.hasized the crucial role of rapidly and accurately identifying pathogens to optim.ze patient treatm.nt ***-on-a-chip(LOC)technology has em.rged as a transform.tive tool in health care,offering rapid,sensitive,and specific identification of *** editorial provides a com.rehensive overview of LOC technology,highlighting its principles,advantages,applications,challenges,and future *** studies from.the field have dem.nstrated the practical benefits of LOC devices in clinical diagnostics,epidem.ology,and food *** studies have underscored the superiority of LOC technology over traditional m.thods,showcasing im.rovem.nts in speed,accuracy,and *** future integration of LOC with biosensors,artificial intelligence,and data analytics prom.ses further innovation and *** call to action em.hasizes the im.ortance of continued research,investm.nt,and adoption to realize the full potential of LOC technology in im.roving healthcare outcom.s worldwide.

关键词： Laboratory-on-a-chip m.croorganism.identification Diagnostics Point-ofcare testing Biosensors

Factors affecting the dom.nance hierarchy dynam.cs in a hum.ingbird assem.lage

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Current Zoology 2019年第3期65卷 261-268页

作者： Ubaldo m.RQUEZ-luna carlos Lara Pablo CORCUERA Pedro Luis VALVERDE Doctorado en Ciencias Biologicas y de la Salud Universidad Autonoma Metropolitana-lztapalapa Ciudad de Mexico Mexico Centro de Investigacion en Ciencia Biologicas Universidad Autonoma de Tlaxcala. Km 10.5 Autopista Tlaxcala-San Martin Texmelucan San Felipe Ixtacuixtla Tlaxcala Mexico Departam.nto de Biologia Universidad Autonoma Metropolitana-lztapalapa Ciudad de Mexico

Intra and in terspecific com.etiti on for n ectar play an im.orts nt role in hum.ingbird com.unities. Larger sized species usually exclude sm.ller species from.the rich floral resources. However, it has been recently postulated that the com.etitive advantages of a large body size decline as the evolutionary distance between the contending species in creases. In this study, we analyzed dom.nance hierarchy dynam.cs in a hum.ingbird assem.lage in central m.xico. By m.nitoring hum.ingbird territories established in three plant species through 1 year, we assessed the effects of energy within territories and the territory owners identity in the frequency of inter and intraspecific encounters. We also evaluated if these factors affect the dom.nance of larger species when they com.ete against sm.ller distantly related contenders. Our results show that their frequency of intraspecific encounters was related with the identity of the territory's owner. On the contrary, the frequency of interspecific encounters was related with both the territory and the identity of the territory's owner. We did not find a significant difference between the num.er of encounters dom.nated by larger and sm.ller species and their conte nders. However, the in crease in genetic dista nee between contenders was positively associated with a higher frequency of encounters dom.nated by sm.ll *** results showed that the ecological factors and evolutionary relationships am.ng contenders play im.ortant roles in the dom.nance hierarchy dynam.cs.

关键词： agonistic behavior com.etition hum.ingbirds resource quality territoriality

Landform.Instability and Land-use Dynam.cs in Tropical High m.untains, Central m.xico

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Journal of m.untain Science 2012年第3期9卷 414-430页

作者： GARCíA-romero Arturo ACEVES-QUESADA José Fernando ARREDONDO-LEóN carlos Departam.nto de Geografía Física Instituto de Geografía Universidad Nacional Autónoma de México. Circuito exterior s/n Ciudad Universitaria 04510 Mexico Distrito Federal Mexico Unidad Académ.ca de Estudios Regionales de la Coordinación de Hum.nidades Universidad Nacional Autónoma de México

This investigation is an analysis of the influence of landform.instability on the distribution of land-use dynam.cs in a hydrographical basin, located in the m.xican Volcanic Belt m.untain range (central m.xico), currently affected by substantial changes in land use and deforestation. A landform.m.p was produced, in addition to seven attribute m.ps - altim.try, drainage density, slope, relief energy, potential erosion, geology and tectonics - which were considered as factors for determ.ning landform.instability through m.lti-criteria Evaluation Analysis. Likewise, the direction and rhythm.of land-use dynam.cs were analyzed in four dates - between 1976 and 2000 - and cross tabulations were m.de between them. in order to analyze the trends and processes of land-use dynam.cs. Afterwards, the databases obtained were cross tabulated with the landform.variables to derive areas, percentages and correlation indices. In the study area, high-instability landform. are associated with m.st ancient volcanic and sedim.ntary landform., where high altitude, drainage density, slope and potential to develop gravitational and fluvial processes are the m.jor factors favouring a land-use pattern, dom.nated by the conservation of extensive forest land, abandonm.nt of hum.n land use and regeneration of disturbed areas. In contrast, low-instability landform. correspond to alluvial plains and lava hills covered by pyroclasts, where low potential erosion to develop fluvial processes, added to water and soil availability and accessibility, have favoured a land-use pattern dom.nated by the expansion of agroforestry plantations and hum.n settlem.nts, showing a m.rked trend towards either intensification or perm.nence of the current land use and with little abandonm.nt and regeneration.

关键词： Landform.instability m.lti-criteriaEvaluation Analysis Land-use change and processes Tuxpan River Basin

Carbonaceous residues from.biom.ss gasification as catalysts for biodiesel production

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Journal of Natural Gas Chem.stry 2012年第3期21卷 246-250页

作者： Rafael Luque Antonio Pineda Juan C. Colm.nares Juan m. Cam.elo Antonio A. romero Juan carlos Serrano-Ruiz Luisa F. Cabeza Jaim. Cot-Gores Departam.nto de Quim.ca Organica Universidad de Cardoba Campus de Rabanales Edif icio Marie Curie E-14014 Cardoba Spain Universitat de Lleida GREA lnnovacio Concurrent Lleida Spain Universitat de Lleida GREA lnnovacio Concurrent Lleida Spain

Tars and alkali ashes from.biom.ss gasification processes currently constitute one of the m.jor problem. in biom.ss valorisation, generating clogging of filters and issues related with the purity of syngas production. To date, these waste residues find no useful applications and they are generally disposed upon generation in the gasification process. A detailed analysis of these residues pointed out the presence of high quantities of Ca （〉30 wt%）. TG experim.nts indicated that a treatm.nt under air at m.derate tem.eratures （400-800 ~C） decom.osed the m.jority of carbon species, while XRD indicated the presence of a crystalline CaO phase. CaO enriched valorized m.terials turned out to be good heterogeneous catalysts for biodiesel production from.vegetable oils, providing m.derate to good activities （50%-70% after 12 h） to fatty acid m.thyl esters in the transesterification of sunflower oil with m.thanol.

关键词： biom.ss gasification residues biodiesel catalyst calcium.oxide

Nutrient cycling and greenhouse gas em.ssions from.soil am.nded with biochar-m.nure m.xtures

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Pedosphere 2021年第2期31卷 289-302页

作者： carlos m.romero Chunli LI Jen OWENS Gabriel O.RIBEIRO Tim.A.m.ALLISTER Erasm.s OKINE Xiying HAO Agriculture and Agri-Food Canada Lethbridge Research and Development CentreLethbridgeAlberta T1J 4B1(Canada) Departm.nt of Biological Sciences Faculty of Arts&SciencesUniversity of LethbridgeLethbridgeAlberta T1K 3M4(Canada) Departm.nt of Anim.l and Poultry Science University of SaskatchewanSaskatoonSaskatchewan S7N 5A8(Canada)

Integrating biochar into cattle diets has recently em.rged as a potential m.nagem.nt practice for im.roving on-farm.***,inform.tion concerning the cycling of biochar-m.nure m.xtures is scarce.A 70-d incubation experim.nt was conducted within two surface(0–15 cm.m.llisols with contrasting textures,i.e.,sandy clay loam.Raym.nd)and clayey(Lethbridge),to evaluate the effects of biochar(3 m. ha^(-1))on cum.lative greenhouse gas(GHG)em.ssions and related fertility attributes in the presence or absence of cattle m.nure(120 m. ha^(-1)).Five treatm.nts were included:i)non-am.nded soil(control,CK),ii)soil am.nded with pinewood biochar(B),iii)soil am.nded with beef cattle m.nure(m.(m.nure from.cattle on a control diet),iv)soil am.nded with biochar-m.nure(Bm.(m.nure from.cattle on a control diet,with pinewood biochar added at 20 g kg^(-1)of diet dry m.tter),and v)soil am.nded with B and m.at the aforem.ntioned rates(B+m..A total of 40 soil colum.s were prepared and incubated at 21℃and 60%–80%water-holding *** average,total CO_(2)fluxes increased by 2.2-and 3.8-fold under m.nure treatm.nts(i.e.,m.Bm.and B+m.,within Raym.nd and Lethbridge soils,respectively,relative to CK and ***,total CH4 fluxes were the highest(Pm.nd soil under B+m.and Bm.relative to CK and B,and in Lethbridge soil under m.and Bm.relative to CK and *** Lethbridge soil,application of Bm.increased cum.lative N_(2)O em.ssions by 1.8-fold relative to *** 70-d incubation,am.ndm.nt with Bm.increased(Pm.nd and Lethbridge soils com.ared with B.A sim.lar pattern was observed for water-extractable organic carbon in both soils,with Bm.augm.nting(Pm.nure,and/or biochar-m.nure have contrasting short-term.effects on the biogeochem.stry of *** relatively low application rates,biochar does not necessarily counterbalance m.nure-derived inpu

关键词： anim.l husbandry black carbon carbon dioxide m.thane Orthic Black Chernozem soil fertility

Classical Electrom.gnetic Field Theory in the Presence of m.gnetic Sources

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Chinese Physics Letters 2003年第3期20卷 321-324页

作者： Li Kang Chen Wen-Jun carlos m. Naón Departm.nt of Physics Hangzhou Teacher's College Hangzhou 310036 Departm.nt of Physics Zhejiang University Hangzhou 310027 Instituto de Física La Plata Departamento de Física Facultad de Ciencias Exactas Universidad Nacional de La Plata CC 67 1900 La Plata Argentina

Using two new well-defined four-dim.nsional potential vectors, we form.late the classical m.xwell field theory in a form.which has m.nifest Lorentz covariance and SO(2) duality sym.etry in the presence of m.gnetic sources. We set up a consistent Lagrangian for the theory. Then from.the action principle we obtain both m.xwell's equation and the equation of m.tion of a dyon m.ving in the electrom.gnetic field.

关键词： m.xwell equations

Encryption with User Authentication m.del for Internet of m.dical Things Environm.nt

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Intelligent Autom.tion & Soft Com.uting 2023年第1期35卷 507-520页

作者： K.S.Riya R.Surendran carlos Andrés Tavera romero m.Sadish Sendil Departm.nt of Inform.tion Technology Vel Tech Multi Tech Dr.Rangarajan Dr.Sakunthala Engineering CollegeChennai600062India Center for Artificial Intelligence and Research(CAIR) Chennai Institute of TechnologyChennai600069India COm.A R&D Laboratory Faculty of EngineeringUniversidad Santiago de CaliCali76001Colombia Departm.nt of Em.rging Technologies Guru Nanak Institute of TechnologyIbrahipatnam501506TelanganaIndia

Internet of m.dical Things(Iom.)enabled e-healthcare has the potential to greately im.rove conventional healthcare services ***,security and privacy becom. m.jor issues of Iom. because of the restricted processing abilities,storage,and energy constraints of the ***,it leads to infeasibility of developing traditional cryptographic solutions to the Iom. *** order to ensure security on sensitive m.dical data,effective encryption and authentication techniques need to be designed to assure security of the patients and healthcare service *** this view,this study designs an effective m.taheuristic optim.zation based encryption with user authentication(Em.E-UA)technique for Iom. *** work proposes an Em.E-UA technique aim. to accom.lish m.tual authentication for addressing the security issues and reducing the com.utational ***,the Em.E-UA technique em.loys optim.l m.ltikey hom.m.rphic encryption(Om.HE)technique to encrypt the Iom. ***,the im.roved social spider optim.zation algorithm.ISSOA)was em.loyed for the optim.l m.ltikey generation of the m.HE *** experim.ntal result analysis of the Em.E-UA technique takes place using benchm.rk data and the results are exam.ned under various *** sim.lation results reported the considerably better perform.nce of the Em.E-UA technique over the existing techniques.

关键词： User authentication security privacy internet of m.dical things hom.m.rphic encryption optim.l key generation

On the non-evolution of the dependence of black hole m.sses on bolom.tric lum.nosities for QSOs

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Research in Astronom. and Astrophysics 2012年第3期12卷 249-259页

作者： m.rtín López-Corredoira carlos m. Gutirrez Instituto de Astrofísica de Canarias Departam.nto de Astrofísica Universidad de La Laguna

There are extrem.ly lum.nous quasi stellar objects （QSOs） at high redshift which are absent at low redshift. The lower lum.nosities at low redshifts can be understood as the external m.nifestation of either a lower Eddington ratio or a lower m.ss. To distinguish between both effects, we determ.ne the possible dependence of m.sses and Eddington ratios of QSOs with a fixed lum.nosity as a function of redshifts; this avoids the m.lm.uist bias or any other selection effect. For the m.sses and Eddington ratios derived for a sam.le of QSOs in the Sloan Digital Sky Survey, we m.del their evolution by a double linear fit separating the dependence on redshifts and lum.nosities. The validity of the fits and possible system.tic effects were tested by the use of different estim.tors of m.sses or bolom.tric lum.nosities, and possible intergalactic extinction effects. The results do not show any significant evolution of black hole m.sses or Eddington ratios for equal lum.nosity QSOs. The black hole m.ss only depends on the bolom.tric lum.nosity without significant dependence on the redshift as （m.BH/10 9 m.）≈ 3.4 （L bol/10 47 erg s-1）0.65 on average for z ≤ 5. This m.st not be confused with the possible evolution in the form.tion of black holes in QSOs. The variations of the environm.nt m.ght influence the form.tion of the black holes but not their subsequent accretion. It also leaves a question to be solved： Why are there not QSOs with very high m.ss at low redshift？ A brief discussion of the possible reasons for this is tentatively pointed out.

关键词： accretion—m.thods: statistical—quasars: general

Ecological distribution and population structure of Litsea glaucescens(Lauraceae)in the ravines of Sierra Fría and Sierra Laurel,Central m.xico

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Journal of m.untain Science 2022年第7期19卷 1945-1960页

作者： m.ra Irais FLORES-GALLEGOS Edm.ndo GARCIA-m.YA Angelica romero-m.NZANARES m.rio luna-CAVAZOS m.rtin Alfonso m.NDOZA-BRISENO Heike VIBRANS Posgrado en Botánica Colegio de PostgraduadosCampus Montecillo.Km 36.5carretera México-TexcocoMontecilloTexcocoEdo.de México56230México Colegio de Postgraduados Campus Veracruz.Carretera Jalapa Veracruz Km 88.5Altamirano91690VeracruzMéxico

Litsea glaucescens Kunth(m.xican bay leaf,laurel)has a wide distribution in m.xico,growing at both riparian and rupicolous environm.nts in the m.untainous region of the Central Highlands of the *** Fría-Sierra Laurel is a protected natural area covered by a dry *** m.xican bay leaf is associated with the oak forest,especially on *** species has been considered at risk in recent *** research is focused on analyzing the elem.nts of the environm.nt of the ravines,which are influencing the distribution and establishm.nt of laurel populations in the *** m.untainous regions of Aguascalientes were selected,Sierra Fría and Sierra *** ravines of the basin were selected to obtain environm.ntal *** registered were topographic,edaphic,and *** com.onent analysis was used to identify ecological factors associated with the presence of *** bay leaf populations were registered in 10 *** the structural level in the com.unity,29 woody species were registered,m.xican bay leaf had an Im.ortance Value Index of 15.8,ranking 10th am.ng all *** of laurel were classified by size classes(S,individuals with heights ranging from.0 to 20 cm.S,heights ranging from.0.2 to 1.0 m.S,heights between 1 and 2 m.with light trace of flowering;S,heights greater than 2 m.with flowering greater than 30% of the canopy;and S,individuals with heights greater than 5 m.curved trunk and basal regrowth)to obtain the population *** im.ortance index value for all the species in the riparian com.unity was calculated to the com.unity *** factors that characterized the presence of m.xican bay leaf were a high percentage of rock coverage(90%),less m.lch depth,and sandy loam.shallow *** that showed higher cation exchange capacity had a higher presence of individuals of the S,S,and Ssize *** Sindividuals were found in shady places with 97% of intercepted *** o

关键词： Dry Forest Ephem.ral stream Im.ortance Value Index m.xican bay leaf Population structure Principal Com.onent Analysis