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Nestling sex ratio is unaffected by individual and population traits in the griffon vulture

Current Zoology 2023年第3期69卷 227-235页

作者： guillermo gomez-lopez Felix Martinez Ana Sanz-Aguilar Martina Carrete guillermo Blanco Department of Evolutionary Ecology National Museum of Natural Sciences(MNCN)Spanish National Research Council(CSiC)Jose Gutierrez Abascal 228006 MadridSpain Escuela Internacional de Doctorado Universidad Rey Juan Carlos(URJC)Tulipan s/n28933 MostolesMadridSpain Animal Demography and Ecology Group Institut Mediterrani d'Estudis Avangats(IMEDEA)Miquel Marques 217020 EsporlesMallorcaSpain Applied Zoology and Conservation Group Universitat de les Illes Balears(UIB)Ctra.De Valldemossa km.7.507122PalmaSpain Department of Physical Chemical and Natural SystemsUniversidad Pablo de Olavide(UPO)Ctra.de Utrera km.141013 SevillaSpain

Variation in offspring sex ratios is a central topic in animal demography and population *** studies have focused on bird species with marked sexual dimorphism and multiple-nestling broods,where the offspring sex ratio is often biased due to different individual or environmental ***,biases in offspring sex ratios have been far less investigated in monomorphic and single-egg laying species,and few studies have evaluated long-term and large-scale variations in the sex ratio of nestling ***,we explore individual and environmental factors potentially affecting the secondary sex ratio of the monomorphic griffon vulture Gyps *** used information collected at three breeding nuclei from central Spain over a 30-year period(1990–2020)to analyse the effects of nestling age,parental age,breeding phenology,conspecific density,population reproductive parameters,and spatial and temporal variability on nestling *** ratio did not differ from parity either at the population or the nuclei *** significant between-year differences were detected,even under highly changing conditions of food availability associated with the mad-cow *** found that tree nesting breeders tend to have more sons than daughters,but as this nesting behavior is rare and we consequently have a small sample size,this issue would require additional *** further research is needed to assess the potential effect of breeder identity on nestling sex ratio,this study contributes to understanding the basic ecology and population dynamics of Griffon Vultures,a long-lived species with deferred maturity and low fecundity,whose minor deviations in the offspring sex ratio might imply major changes at the population level.

关键词： offspring sex ratio nestling sex Gyps fulvus monomorphism mad-cow crisis demography

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The effect of rippling on the mechanical properties of graphene

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Nano Materials Science 2022年第1期4卷 18-26页

作者： guillermo lopez-Polin Cristina gomez-Navarro Julio gomez-Herrero Instituto de Ciencia de Materiales de Madrid CSICMadrid E 28049Spain Departamento de Física de La Materia Condensada Universidad Autónoma de MadridMadridE-28049Spain IFIMAC Condensed Matter Physics Center(IFIMAC).Universidad Autónoma de Madrid MadridE-28049Spain

Graphene is the stiffest material known so far but, due to its one-atom thickness, it is also very ***, free-standing graphene exhibit ripples that has major effects on its elastic properties. Here we will summarize three experiments where the influence of rippling is essential to address the results. Firstly, we observed that atomic vacancies lessen the negative thermal expansion coefficient(TEC) of free-standing *** also observed an increase of the Young's modulus with global applied strain and with the introduction of small density defects that we attributed to the decrease of rippling. Here, we will focus on a surprising feature observed in the data: the experiments consistently indicate that only the rippling with wavelengths between 5 and 10 nm influences the mechanics of graphene. The rippling responsible of the negative TEC and anomalous elasticity is thought to be dynamic, i.e. flexural phonons. However, flexural phonons with these wavelengths should have minor effects on the mechanics of graphene, therefore other mechanisms must be considered to address our observations. We propose static ripples as one of the key elements to correctly understand the thermomechanics of graphene and suggest that rippling arises naturally due to a competition of symmetry breaking and anharmonic fluctuations.

关键词： Graphene Mechanical properties Atomic force microscopy Defects Ripples Stmain

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Large solitary ovarian metastasis from colorectal cancer diagnosed by endoscopic ultrasound

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World Journal of Gastroenterology 2008年第32期14卷 5096-5097页

作者： Bhavani Moparty guillermo gomez Manoop S Bhutani Department of Internal Medicine University of Texas Medical Branch Department of Surgery University of Texas Medical Branch Department of Gastrointestinal Medicine and Nutrition UT MD Anderson Cancer Center

A case is presented of rectal carcinoma in which during staging by endoscopic ultrasound （EUS） a second large extra recta l mass was seen not otherwise visualized on computer tomograghy （CT） that was a solitary ovarian metastasis. The surgeon was alerted to the EUS finding prior to the planned laparoscopic colectomy. On retrospective review of the CT pelvis after surgery, the radiologist could still not diagnose the ovarian lesion separated from the primary rectal tumor due to their close proximity. However, on EUS we were able to clearly see on real-time imaging that there was a distinct peri-rectal mass apart from the primary rectal tumor.

关键词： Colorectal Cancer Endoscopic ultrasound Ovary Ovarian metastasis Endoscopic ultrasound Endosonography

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Tunable nano-engineered anisotropic surface for enhanced mechanotransduction and soft-tissue integration

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Nano Research 2023年第5期16卷 7293-7303页

作者： Pingping Han Tianqi Guo Anjana Jayasree guillermo A.gomez Karan Gulati Sašo Ivanovski The University of Queensland School of DentistryEpigenetics nanodiagnostic and therapeutic groupCenter for Oral-facial RegenerationRehabilitation and Reconstruction(COR3)BrisbaneQueensland 4006Australia The University of Queensland School of DentistryBrisbaneQueensland 4006Australia The University of Queensland School of DentistryGroup for Anodized Therapies for OsseointegrationRegeneration and StimulationCenter for Oral-facial RegenerationRehabilitation and Reconstruction(COR3)BrisbaneQueensland 4006Australia Centre for Cancer Biology South Australia Pathology and the University of South AustraliaAdelaideSouth Australia 5001Australia

Electrochemically engineered titania(TiO_(2))nanopores enable tailored cellular function;however,the cellular mechanosensing mechanisms dictating the cell response and soft tissue integration are yet to be ***,we report the fabrication of anisotropic TiO_(2)nanopores with diameters of 46 and 66 nm on microrough titanium(Ti)via electrochemical anodization,towards short-and long-term guidance of human primary gingival fibroblasts(hGFs).Cells on tissue culture plates and bare Ti substrates were used as ***,we show that nanopores with a diameter of 66 nm induced more mature focal adhesions of vinculin and paxillin at the membrane,encouraged the development of actin fibers at focal adhesion sites,led to elongated cell and nuclear *** topographical-driven changes were attributed to the Ras-related C3 botulinum toxin substrate 1(Rac 1)GTPase pathway and nuclear localisation of LAMIN A/C and yes-associated protein(YAP)and associated with increased ligament differentiation with elevated expression of the ligament marker Mohawk homeobox(MKX).Study findings reveal that minor tuning of nanopore diameter is a powerful tool to explore intracellular and nuclear mechanotransduction and gain insight into the relationships between nanomaterials and mechanoresponsive cellular elements.

关键词： titanium nanopores nanotopography fibroblast mechanosensing mechanotransduction ligament differentiation

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Properties of nuclear pastas

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Frontiers of physics 2021年第2期16卷 119-173页

作者： Jorge A.lopez Claudio O.Dorso guillermo Frank Department of Physics University of Texax at El PasoEl PasoTexas 79968USA Departamento de Fisica FCENUniversidad de Buenos AiresNunezArgentina Unidad de Investigacion y Desarrollo de las Ingenierias Universidad Tecnologica NacionalFacultad Regional Buenos AiresBuenos AiresArentina

In this review we study the nuclear pastas as they are expected to be formed in neutron star *** start with a study of the pastas formed in nuclear matter(composed of protons and neutrons),we follow with the role of the electron gas on the formation of pastas,and we then investigate the pastas in neutron star matter(nuclear matter embedded in an electron gas).Nuclear matter(NM)at intermediate temperatures(1 MeV≤T≤***),at saturation and and sub-saturation densities,and with proton content ranging from 30%to 50%was found to have liquid,gaseous and liquid-gas mixed *** isospin-dependent phase diagram was obtained along with the critical points,and the symmetry energy was calculated and compared to experimental data and other *** low temperatures(T≤1 MeV)NM produces crystal-like structures around satura-tion densities,and pasta-like structures at sub-saturation *** of the pasta structures were studied with cluster-recognition algorithms,caloric curve,the radial distribution function,the Lindemann coefficient,Kolmogorov statistics,Minkowski functionals;the symmetry energy of the pasta showed a connection with its *** star matter(NSM)is nuclear matter embedded in an electron *** electron gas is included in the calculation by the inclusion of an screened Coulomb *** connect the NM pastas with those in neutron star matter(NSM),the role the strength and screening length of the Coulomb interaction have on the formation of the pastas in NM was *** was found to exist even without the presence of the electron gas,but the effect of the Coulomb interaction is to form more defined pasta structures,among other ***,it was determined that there is a minimal screening length for the developed structures to be independent of the cell *** star matter was found to have similar phases as NM,phase transitions,symmetry energy,structure function and thermal *** in NM,pasta f

关键词： nuclear pasta neutron star matter nuclear symmetry energy molecular dynamics nuclear phase transitions

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Optimal Coordinated Operation of Distributed Static Series Compensators for Wide-area Network Congestion Relief

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Journal of Modern Power Systems and Clean Energy 2022年第5期10卷 1374-1384页

作者： Camilo Andres Ordonez M Antonio gomez-Exposito guillermo EVinasco M Jose Maria Maza-Ortega IEEE Smart Wires Union CityUSA Department of Electrical Engineering University of SevilleSevillaSpain Interconexion Electrica SA Intercolombia Sevilla Spain

Relieving network congestions is a critical goal for the safe and flexible operation of modern power systems, especially in the presence of intermittent renewables or distributed generation. This paper deals with the real-time coordinated operation of distributed static series compensators(DSSCs) to remove network congestions by suitable modifications of the branch reactance. Several objective functions are considered and discussed to minimize the number of the devices involved in the control actions, the total losses or the total reactive power exchanged, leading to a non-convex mixed-integer non-linear programming problem. Then, a heuristic methodology combining the solution of a regular NLP with k-means clustering algorithm is proposed to get rid of the binary variables, in an attempt to reduce the computational cost. The proposed coordinated operation strategy of the DSSCs is tested on several benchmark systems, providing feasible and sufficiently optimal solutions in a reasonable time frame for practical systems.

关键词： Distributed static series compensation(DSSC) flexible AC transmission system(FACTS) mixed-integer non-linear programming(MINLP) wide-area network control

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US children with special health care needs and ethnic discrimination: results from multivariate modeling

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World Journal of Pediatrics 2019年第2期15卷 182-189页

作者： guillermo Montes St.John Fisher College Alesi 106C3690 East Ave.RochesterNY 14618USA Children's Institute Inc. RochesterNYUSA

Background To determine the prevalence of parent-reported ethnic/racial discrimination,and to determine if children with special health care needs are more likely to experience ethnic discrimination than other children who have similar family income,age,sex,race,parental education and Hispanic *** Using the National Survey of Children's Health 2011-2012 (n =95,677),ethnic discrimination was measured by two questions that asked 'was child ever treated or judged unfairly because of his/her race or ethnic group?' and if so,how often it occurred in the last 12 months prior to the *** An estimated 3 million US children aged 0-17 years have experienced parent-reported ethnic discrimination (1.4% White,9.1% Black,9.9% other race,4.7% Hispanic).The likelihood to experience ethnic discrimination is much higher for Black and other race children,compared to White *** with special health care needs were two times more likely to experience ethnic discrimination frequently in the 12 months prior to the survey than comparable children in terms of age,sex,race,family income,parental education,and social *** family income did not prevent the exposure to ethnic discrimination but was associated with fewer *** Theoretical frameworks,such as social determinants of health,must account for the bidirectional nature of the relationship between health and ethnic *** care must assess if ethnic discrimination has occurred and whether trauma-informed approaches are needed.

关键词： Children with special health care needs Ethnic discrimination United States

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Empirical formulae to describe some physical properties of small groups of protogalaxies with multiplicity

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Research in Astronomy and Astrophysics 2021年第8期21卷 141-158页

作者： guillermo Arreaga-Garcia Departamento de Investigacion en Fisica Universidad de Sonora Apdo.Postal 14740C.P.83000HermosilloSonoraMexico

By means of identical cubic elements,we generate a partition of a volume in which a particle-based cosmological simulation is carried *** each cubic element,we determine the gas particles with a normalized density greater than an arbitrarily chosen density *** using a proximity parameter,we calculate the neighboring cubic elements and generate a list of *** imposing dynamic conditions on the gas particles,we identify gas clumps and their neighbors,so that we calculate and fit some properties of the groups so identified,including the mass,size and velocity dispersion,in terms of their multiplicity(here defined simply as the number of member galaxies).Finally,we report the value of the ratio of kinetic energy to gravitational energy of such dense gas clumps,which will be useful as initial conditions in simulations of gravitational collapse of gas clouds and clusters of gas clouds.

关键词： galaxies:kinematics and dynamics hydrodynamics methods:numerical

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A thick-disk galaxy model and simulations of equal-mass galaxy pair collisions

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Research in Astronomy and Astrophysics 2020年第11期20卷 333-353页

作者： guillermo Arreaga-Garcıa Departamento de Investigacion en Fsica Universidad de Sonora.Apdo.Postal 14740C.P.83000HermosilloSonoraMexico

We implement a numerical model reported in the literature to simulate the evolution of a galaxy composed of four matter components,such as:a dark-matter halo;a rotating disk of stars;a spherical bulge of stars and a ring of molecular *** show that the evolution of this galaxy model is stable at least for 10 Gyr(Gyr=109 years).We characterize the resulting configuration of this galaxy model by figures of the circular velocity and angular momentum distribution;the tangential and radial components of the velocity;the peak density evolution and the radial density ***,we calculate several models of equal-mass galaxy binary collisions,such as:(i)frontal and(ii)oblique(with an impact parameter),(iii)two models with initial conditions taken from a 2-body orbit and(iv)a very close *** allow comparison with the galaxy model,we characterize the dynamics of the collision models in an analogous ***,we determine the de Vaucouleurs fitting curves of the radial density profile,on a radial scale of 0–100 kpc,for all the collision models irrespective of the pre-collision *** study the radial mass density and radial surface density profiles at a smaller radial scale,0–20 kpc,we use a four-parameter fitting curve.

关键词： galaxies kinematics and dynamics galaxies interaction methods numerical

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An alternative to MINFLUX that enables nanometer resolution in a confocal microscope

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Light(Science & Applications) 2022年第9期11卷 2077-2085页

作者： LUCIANO A.MASULLO ALAN M.SZALAI LUCIA F.lopez MAURICIO PILO-PAIS guillermo P.ACUNA Fernando D.Stefani Centro de Investigaciones en Bionanociencias(CIBION) Consejo Nacionallde Investigaciones Cientificas y Técnicas(CONICET)Godoy Cruz 2390C1425FQD Ciudad Autónoma de Buenos AiresBuenos AiresArgentina Departamento de Fisica Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresGuiraldes 2620C1428EHA Ciudad Autónoma de Buenos AiresBuenos AiresArgentina Department of Physics University of FribourgChemin du Musee 3Fribourg CH-1700Switzerland

Localization of single fluorescent emitters is key for physicochemical and biophysical measurements at the nanoscale and beyond ensemble *** include single-molecule tracking and super-resolution imaging by single-molecule localization *** the numerous localization methods available,MINFLUX outstands for achieving a~10-fold improvement in resolution over wide-field camera-based approaches,reaching the molecular scale at moderate photon *** application of MINFLUX and related methods has been hindered by the technical complexity of the ***,we present RASTMIN,a single-molecule localization method based on raster scanning a light pattern comprising a minimum of *** delivers~1-2nm localization precision with usual fluorophores and is easily implementable on a standard confocal microscope with few *** demonstrate the performance of RASTMIN in localization of single molecules and super-resolution imaging of DNA origami structures.

关键词： resolution pattern enable

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