检索结果-南通市图书馆

Unveiling the brain’s symphony:exploring the necessity and sufficiency of neural networks in behavior control

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第1期20卷 186-187页

作者： Fernando jose Bustos Instituto de Ciencias Biomedicas Facultad de Medicina y Facultad de Ciencias de la VidaUniversidad Andres BelloSantiagoChile Millennium Nucleus of Neuroepigenetics and Plasticity(EpiNeuro) SantiagoChile

Since the pioneering work by Broca and Wernicke in the 19th century,who examined individuals with brain lesions to associate them with specific behaviors,it was evident that behaviors are complex and cannot be fully attributable to specific brain areas ***,they involve connectivity among brain areas,whether close or *** that time,this approach was considered the optimal way to dissect brain circuitry and *** pioneering efforts opened the field to explore the necessity or sufficiency of brain areas in controlling behavior and hence dissecting brain ***,the connectivity of the brain and the mechanisms through which various brain regions regulate specific behaviors,either individually or collaboratively,remain largely *** animal models,researchers have endeavored to unravel the necessity or sufficiency of specific brain areas in influencing behavior;however,no clear associations have been firmly established.

关键词： behavior connectivity neural

Acoustic streaming and Sun's meridional circulation

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2016年第9期16卷 101-106页

作者： jose manuel Valverde Faculty of Physics University of Seville

A vast number of physical processes involving oscillations of a bounded viscous fluid are relevantly influenced by acoustic streaming. When this happens a steady circulation of fluid develops in a thin boundary adjacent to the interface. Some examples are refracted sound waves, a fluid inside a spherical cavity undergoing torsional oscillations or a pulsating liquid droplet. Steady streaming around circular interfaces consists of a hemispherically symmetric recirculation of fluid from the equatorial plane to the polar axes closely resembling the meridional circulation pattern observed in the Sun＇s convection zone that determines the solar cycle. In this paper, it is argued that the acoustic pulsations exhibited by the Sun would lead to acoustic streaming in the boundary of the convection zone. A simple estimation using a typical dominant frequency of 3 mHz and the observed surface oscillation amplitude yields a steady streaming velocity Us - 10 m s^-1, which is on the order of the meridional circulation velocity observed in the Sun＇s convection zone.

关键词： Sun general -- Sun helioseismology -- Sun granulation -- Sun oscillations -- Sun fun-damental parameters -- Sun activity

Magnetic field assisted fluidization:A modified Richardson-Zaki equation

在线全文

学校读者我要写书评

暂无评论

China Particuology 2007年第1期5卷 61-70页

作者： jose manuel Valverde Antonio Castellanos Faculty of Physics Universidad de Sevilla Avenida Reina Mercedes s/n 41012 Sevilla Spain

Magnetic particles can be uniformly fluidized by coupling the gas flow with an externally imposed magnetic field. Interparticle forces generated by the magnetic field cause aggregation of the particles in chain-like structures preferentially oriented along the magnetic field lines. In the present paper, we study the implications of the formation of these special types of aggregates on the empirical Richardson-Zaki （RZ） equation, originally proposed to describe the expansion of fluidized beds of non-aggregated particles. We have addressed two important issues, namely the flow regime, which is a function of the size of the aggregates, and the effect of shape and orientation of the chain-like aggregates with respect to gas flow on fluid drag. We propose a modified RZ equation （MRZE） in which the velocity scale, given by the terminal settling velocity of the individual aggregates, and the RZ exponent are predetermined as a function of the chain length. The chain length depends on the ratio of the magnetic energy to gravitational energy, and is estimated from the magnetic field intensity, and particle magnetization, size and density. Predictions of the MRZE are successfully compared with published results in the literature on the expansion of magnetic particles in the presence of externally applied magnetic fields.

关键词： Fluidization Geldart B Magnetic particles Aggregation Richardson-Zaki equation

Critical evaluation of transit policies in Lima,Peru;resilience of rail rapid transit(Metro)in a developing country

在线全文

学校读者我要写书评

暂无评论

Green Energy and Intelligent Transportation 2024年第5期3卷 23-33页

作者： manuel jose Martinez Representante Legal Instituto de Avance del Transporte Peruano EIRLCalle Schrader 179dpto.202Lima 41San BorjaLimaPeru

This paper evaluates rail transit within the context of the transit policies implemented in Lima,*** it reviews the implementation of rapid transit,and bus ***,it evaluates the outcomes of such policies by using Total Factor Productivity for policy effectiveness,Data Envelopment Analysis for rapid transit performance,and Generalized Cost of Travel for *** paper finds that implementation failed in enforcing key requirements for rail transit regarding penetration of CBD and short transfers to bus transit;and that the basic assumptions of bus reform did not hold regarding bus oversupply,bus congestion or bus *** paper also finds that outcomes of policies failed dramatically in achieving the planning goals;however,rail transit(Metro)shows high level of resilience in serving large ridership at high *** the other hand,bus reform was associated with a disproportionate increase of motorization,well over the effect of income growth or car attractiveness,and more related to the excessive reduction of bus transit capacity ill-advised from unproved bus reform *** paper recommends expanding rail rapid transit due to its intensive use of green renewable energy and its potential of demand growth if combined with modern Intelligent Transportation services,but this opportunity can be wasted without the proposed policy constraint to achieve lower Generalized Cost of Travel at any governmental intervention for bus reform,instead of just reducing bus transit capacity as ***,this paper recommends government to government contracts to build rail transit and to enforce proper planning.

关键词： Public transportation Bus rapid transit Rail transportation Bus transit Developing countries Resilient

Female mate choice based on pheromone content may inhibit reproductive isolation between distinct populations of Iberian wall lizards

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2013年第2期59卷 210-220页

作者： Marianne GABIROT Pilar lopez jose MARTIN Departement Ecologie Comportementale (U.M.R. 5175) CEFE-CNRS 1919 Route de Mende F34293 Montpellier Cedex 5 France Departamento de Ecologia Evolutiva Museo Naeional de Ciencias Naturales C.S.I.C. Jos6 Guti6rrez Abascal 2 28006 Madrid Spain

The Iberian wall lizard Podarcis hispanica forms part of a species complex with several morphologically and geneti- cally distinct types and populations, which may or may not be reproductively isolated. We analyzed whether female mate choice based on males＇ chemical signals may contribute to a current pre-mating reproductive isolation between two distinct populations of P. hispanica from central Spain. We experimentally examined whether females choose to establish territories on areas scent-marked by males of their own population, versus areas marked by males of the other population. Results showed that fe- males did not prefer scent-marks of males from their own population. In contrast, females seemed to attend mostly to among-individual variation in males＇ pheromones that did not differ between populations. Finally, to test for strong premating re- productive isolation, we staged intersexual encounters between males and females. The population of origin of males and females did not affect the probability nor the duration of copulations. We suggest that the different environmental conditions in each population might be selecting for different morphologies and different chemical signals of males that maximize efficiency of communication in each environment. However, females in both populations based mate choice on a similar condition-dependent signal of males. Thus, male signals and female mate choice criteria could be precluding premating reproductive isolation between these phenotypically ＂distinct＂ populations [Current Zoology 59 （2）： 210-220, 2013].

关键词： Podarcis hispanica Chemical communication Mate preferences Mate recognition Species recognition Conflict

Perceptions and emotions in postoperative recovery of patients with perianal diseases

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Psychiatry 2025年第1期15卷 179-184页

作者： Bryan Adrian Priego-Parra jose Maria Remes-Troche Digestive Physiology and Gastrointestinal Motility Lab Instituto de Investigaciones Médico-BiológicasUniversidad VeracruzanaVeracruz 91700Mexico

This article examines the complex relationship between disease perception,negative emotions,and their impact on postoperative recovery in patients with perianal *** conditions not only cause physical discomfort,but also carry a significant emotional burden,often exacerbated by social ***-logical factors,including stress,anxiety,and depression,activate neuroendocrine pathways,such as the hypothalamic–pituitary–adrenal axis,disrupting the gut microbiota and leading to *** disruption can delay wound healing,prolong hospital stay,and intensify *** on the findings of Hou et al,our article highlights the critical role of illness perception and negative emotions in shaping recovery *** advocates for a holistic approach that integrates psychological support and gut microbiota modulation,to enhance healing and improve overall patient outcomes.

关键词： Perianal disease Illness perception Gut microbiota Post-surgical outcomes Microbiota

Contrasting size-dependent life history strategies of an insular lizard

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2020年第6期66卷 625-633页

作者： Andreu Rotger jose manuel Igual Giacomo Tavecchia Animal Demography and Ecology Unit GEDAIMEDEA(CSIC-UIB)c M.Marques 2101790EsporlesSpain

In many species with continuous growth,body size is an important driver of life-history tactics and its relative importance is thought to reflect the spatio-temporal variability of selective *** developed a deterministic size-dependent integral projection model for 3 insular neighboring lizard populations with contrasting adult body sizes to investigate how size-related selective pressures can influence lizard life-history *** each population,we broke down differences in population growth rates into contributions from size-dependent body growth,survival,and feeundity.A life table response experiment(LTRE)was used to compare the population dynamics of the 3 populations and quantify the contributions of intrinsic demographic coefficients of each population to the population growth rate(z).Perturbation analyses revealed that the largest adults contributed the most to the population growth rate,but this was not true in the population with the smallest adults and size-independent *** we were not able to identify a single factor responsible for this difference,the combination of the demographic model on a continuous trait coupled with an LTRE analysis revealed how individuals from sister populations of the same species follow different life strategies and showed different compensatory mechanisms among survival,individual body growth,and *** results indicate that body size can play a contrasting role even in closely-related and closely-spaced populations.

关键词： body size capture-recapture integral projection model Lilfords lizard size-dependent mortality

The role of solvents in the formation of methylammonium lead triiodide perovskite

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第5期31卷 393-400页

作者： Junke Jiang jose manuel Vicent-Luna Shuxia Tao Materials Simulation andModelling.Department of Applied Physics Eindhoven University of Technology.Eindhoven 5600 MB.the Netherlands Center for Computational Energy Research Department of Applied PhysicsEindhoven University of Technology.Eindhoven 5600 MB.the Netherlands

Metal halide perovskites(MHPs) are gaining increasing attention as low-cost, high-performance semiconductors for optoelectronics. In particular, their solution processing is compatible with the largescale manufacturing of thin-film devices, including solar cells and light-emitting *** the coordination chemistry in precursor-solvent solution and atomistic mechanisms of film formation is of great importance for optimizing the optoelectronic properties of the final *** the methylammonium lead triiodide(MAPbI_(3)) as an example, we study the complex evolution of the molecular species from the solution to the initial stage of the crystallization by using a combination of density functional theory(DFT) calculations and ab-initio molecular dynamics(AIMD) simulations. We focus on the widely employed solvents DMSO and DMF, analyze the structures and energies of the iodoplumbate complexes in the form of simple complex of [PbI_(m)L_(n)]^(2-m))_(x) and polymeric iodoplumbates of([PbI_(m)L_(n)]^(2-m))_(x). Based on the calculated formation enthalpies, we propose reaction schemes of MAPbI_(3) formation in DMSO, DMF and DMF-DMSO binary solvent and explain the advantages of the binary *** highlight the important role of NH...O hydrogen bonds in the formation of iodoplumbates *** calculations indicate unbalanced reaction energies at several elementary reaction steps in either DMF(formation of [PbI_(4)L_(n)]^(2-) being highly favourable) or DMSO(formation of [PbI_(5)L_(n)]^(3- )being retarded).Mixing a small amount of DMSO in DMF gives rise to a better balance in the energies and, therefore,potentially better equilibria in the overall crystallization process and better quality of the final perovskite films.

关键词： MAPbI_(3) Perovskite formation Solvents DFT

Unexplained liver laceration after metastasis radiofrequency ablation

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2009年第40期15卷 5103-5105页

作者： Esther Ua Javier Trueba jose manuel Montes Medical Oncology Service Clinical University Hospital of Valladolid Radiology Service Clinical University Hospital of Valladolid

Many studies have established the role of radiofrequency (RF) ablation as a minimally invasive treatment for liver metastases. Although relatively safe, several complications have been reported with the increased use of RF ablation. We describe here a case of unexplained liver laceration after a RF procedure. A woman who presented a solitary metachronous liver metastasis underwent RF ablation treatment for this lesion. Six hours later the patient displayed fatigue and pallor. Emergency blood tests showed a haemoglobin level of < 7 g/dL and markedly elevated transaminase levels. A computed tomography examination revealed two areas of liver laceration with haematoma, one of them following the path of the needle and the other leading away from the f irst. Following a blood transfusion, the patient was haemodynamically stable and completely recovered 24 h later. The patient remained in bed for 1 wk. No surgical intervention was required, and she was discharged 1 wk later.

关键词： Colon cancer Liver haemorrhage Liver laceration Liver metastases Radiofrequency ablation