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Optical properties of phosphate glasses co-doped with Yb^(3+) and silver nanoparticles

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Chinese Physics B 2014年第12期23卷 249-253页

作者： M.A.vallejo H. M.A.Martinez g. A.v.Kiryanov J.L.Lucio M. Centro de Investigaciones enóptica Loma del Bosque 115 Col.Lomas del CampestreLeón 37150 Guanajuato Mxico División de Ciencias e Ingenierías del Campus León de la Universidad de guanajuato Loma del Bosque 103Col.Lomas del Campestre37150León Guanajuato Mxico

We report the fabrication and spectroscopic characterization of Yb^3＋-doped phosphate glass, also containing silver nitrate. Scanning electron microscopy（SEM） provides the evidence of the formation of silver nano-particles（SNPs）, which are formed as a consequence of melting and thermal decomposition of Ag NO3. Absorption spectra of the samples in the visible-to-near-infrared spectral range reveal the presence of bands centered at 410 nm associated with the SNP-plasmon resonance, and at 976 nm due to the Yb^3＋. Under 916-nm laser-diode pumping, the effect of the SNP reflects that： i） the fluorescence in the 950-nm–1150-nm spectral range is strongly enhanced（～ 30 times）, while the fluorescence decay time associated with the ^2F5/2→^2F7/2transition of Yb^3＋ increases 25%, and ii） the basic lasing properties（saturation pumping intensity, the emission and absorption cross sections） are substantially improved.

关键词： rare earths phosphate glasses silver nanoparticles

Effect of Whole-genome Duplication on the Evolutionary Rescue of Sterile Hybrid Monkeyflowers

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Plant Communications 2020年第6期1卷 58-71页

作者： Sofie Meeus KristýnaSemberová Nico De Storme Danny geelen Mario vallejo-Marín Department of Biological and Environmental Sciences.University of Stirling Stirling FK94LAUK Department of Botany Charles University12843 Prague 2Czech Republic Department of Plants and Crops Ghent University9000 GhentBelgium Meise Botanic garden Nieuwelaan 381860 MeiseBelgium Department of Biosystems KU LeuvenHeverlee 3001Belgium

Hybridization is a creative evolutionary force,increasing genomic diversity and facilitating adaptation and even *** often face significant challenges to establishment,including reduced fertility that arises from genomic incompatibilities between their ***-genome duplication in hybrids(allopolyploidy)can restore fertility,cause immediate phenotypic changes,and generate reproductive *** the survival of polyploid lineages is uncertain,and few studies have compared the performance of recently formed allopolyploids and their parents under field ***,we use natural and synthetically produced hybrid and polyploid monkeyflowers(Mimulus spp.)to study how polyploidy contributes to the fertility,reproductive isolation,phenotype,and performance of hybrids in the *** find that polyploidization restores fertility and that allopolyploids are reproductively isolated from their *** phenotype of allopolyploids displays the classic gigas effect of whole-genome duplication,in which plants have larger organs and are slower to *** experiments indicate that survival of synthetic hybrids before and after polyploidization is intermediate between that of the parents,whereas natural hybrids have higher survival than all other *** conclude that hybridization and polyploidy can act as sources of genomic novelty,but adaptive evolution is key in mediating the establishment of young allopolyploid lineages.

关键词： allopolyploid Erythranthe Mimulus polyploidy speciation whole-genome duplication

Runtime Power Allocation Based on Multi-gPU Utilization in gAMESS

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Journal of Computer and Communications 2022年第9期10卷 66-80页

作者： Masha Sosonkina vaibhav Sundriyal Jorge Luis galvez vallejo Department of Electrical and Computer Engineering Old Dominion University Norfolk USA Department of Chemistry Iowa State University Ames USA

To improve the power consumption of parallel applications at the runtime, modern processors provide frequency scaling and power limiting capabilities. In this work, a runtime strategy is proposed to maximize performance under a given power budget by distributing the available power according to the relative gPU utilization. Time series forecasting methods were used to develop workload prediction models that provide accurate prediction of gPU utilization during application execution. Experiments were performed on a multi-gPU computing platform DgX-1 equipped with eight NvIDIA v100 gPUs used for quantum chemistry calculations in the gAMESS package. For a limited power budget, the proposed strategy may deliver as much as hundred times better gAMESS performance than that obtained when the power is distributed equally among all the gPUs.

关键词： Time Series Forecasting ARIMA Power Allocation Performance Modeling gAMESS gPU Utilization

THE SALIvAL gLAND CELLS OF MICE A IN vIvO SYSTEM FOR gENOTOXIC ASSAY AND RESEARCH

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癌变．畸变．突变 1991年第S1期3卷 130-130页

作者： Morales-Ramirez P.vallarino-Kelly T.Rodriguez Regina. Cruz vallejo v. Instituto Nacional de Investigaciones Nucleares Instituto Nacional de Investigaciones NuclearesInstituto Nacional de Investigaciones NuclearesInstituto Nacional de Investigaciones Nucleares

Murine salivary glands are normally nonproliferat-ing but one cell division may be induced whenevera single injection of isoproterenol is *** represents a unique in vivo system in-whichcell proliferation can be elicit... 详细信息

关键词： salivary normally mitomycin repair versus gamma radia producing

Stochastic Computational Heuristic for the Fractional Biological Model Based on Leptospirosis

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Computers, Materials & Continua 2023年第2期74卷 3455-3470页

作者： Zulqurnain Sabir Sánchez-Chero Manuel Muhammad Asif Zahoor Raja gilder-Cieza–Altamirano María-verónica Seminario-Morales Fernández vásquez JoséArquímedes Purihuamán Leonardo Celso Nazario Thongchai Botmart Wajaree Weera Department of Mathematics and Statistics Hazara UniversityMansehraPakistan Universidad Nacional de Frontera SullanaPiuraPerú Future Technology Research Center National Yunlin University of Science and Technology123 University RoadSection 3Douliou64002YunlinTaiwan Universidad Nacional Autónoma de Chota CajamarcaPerú Universidad Cesar vallejo TrujilloLa LibertadPerú Universidad Señor de Sipán ChiclayoPerú Department of Mathematics Faculty of ScienceKhon Kaen UniversityKhon Kaen40002Thailand

The purpose of these investigations is to find the numerical outcomes of the fractional kind of biological system based on Leptospirosis by exploiting the strength of artificial neural networks aided by scale conjugate gradient,called *** fractional derivatives have been applied to get more reliable performances of the *** mathematical form of the biological Leptospirosis system is divided into five categories,and the numerical performances of each model class will be provided by using the *** exactness of the ANNs-SCg is performed using the comparison of the reference and obtained *** reference solutions have been obtained by using theAdams numerical *** these investigations,the data selection is performed at 82%for training,while the statics for both testing and authentication is selected as 9%.The procedures based on the recurrence,mean square error,error histograms,regression,state transitions,and correlation will be accomplished to validate the fitness,accuracy,and reliability of the ANNs-SCg scheme.

关键词： Fractional leptospirosis biological model artificial neural networks scale conjugate gradient numerical performances

The Periaqueductal gray and Its Extended Participation in Drug Addiction Phenomena

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Neuroscience Bulletin 2021年第10期37卷 1493-1509页

作者： Priscila vazquez-Leon Abraham Miranda-Paez Jesus Chavez-Reyes gonzalo Allende Paulino Barragan-Iglesias Bruno A.Marichal-Cancino Departamento de Fisiologia y Farmacologia Centro de Ciencias BasicasUniversidad Autonoma de AguascalientesCiudad Universitaria20131 AguascalientesAgs.Mexico Departamento de Fisiologia Escuela Nacional de Ciencias BiologicasInstituto Politecnico NacionalWilfrido Massieu esq.Manuel Stampa s/n Col.Nueva Industrial Vallejo07738 Gustavo A.MaderoMexico CityMexico

The periaqueductal gray(PAg)is a complex mesencephalic structure involved in the integration and execution of active and passive self-protective behaviors against imminent threats,such as immobility or flight from a *** activity is also associated with the integration of responses against physical discomfort(e.g.,anxiety,fear,pain,and disgust)which occurs prior an imminent attack,but also during withdrawal from drugs such as morphine and *** PAg sends and receives projections to and from other well-documented nuclei linked to the phenomenon of drug addiction including:(i)the ventral tegmental area;(ii)extended amygdala;(iii)medial prefrontal cortex;(iv)pontine nucleus;(v)bed nucleus of the stria terminalis;and(vi)*** models have suggested that the PAg contributes to the modulation of anxiety,fear,and nociception(all of which may produce physical discomfort)linked with chronic exposure to drugs of *** produced by the major pharmacological classes of drugs of abuse is mediated through actions that include participation of the *** support of this,there is evidence of functional,pharmacological,***/or genetic alterations in the PAg during the impulsive/compulsive intake or withdrawal from a *** to its small size,it is difficult to assess the anatomical participation of the PAg when using classical neuroimaging techniques,so its phys-iopathology in drug addiction has been underestimated and poorly *** this theoretical review,we discuss the involvement of the PAg in drug addiction mainly via its role as an integrator of responses to the physical discomfort associated with drug withdrawal.

关键词： Periaqueductal gray Reward circuit Antireward circuit Alcohol Caffeine Cannabis Opioids Stimulants