检索结果-南通市图书馆

A longitudinal network analysis of social dynamics in rooks corvus frugilegus： repeated group modifications do not affect social network in captive rooks

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 2017年第5期63卷 379-388页

作者： Palmyre H. BOUCHERIE Sebastian sosa Cristian PASQUARETTA Valerie DUFOUR Institut Pluridisciplinaire Hubert Curien University of Strasbourg 23 rue Becquerel 67087 Strasbourg France Centre National de la Recherche Scientifique UMR 7178 67087 Strasbourg France Formerly affiliated with Grupo de Conducta Adaptativa e Interacci6n Psychology Faculty University of Barcelona 08035 Barcelona Spain

Numerous studies have investigated the remarkable variation of social features and the resulting structures across species. Indeed, relationships are dynamic and vary in time according to various factors such as environmental conditions or individuals attributes. However, few studies have investigated the processes that stabilize the structures within a given species, and the behavioral mechanisms that ensure their coherence and continuity across time. Here, we used a dynamic actor-based model, RSiena, to investigate the consistency of the temporal dynamic of relationships of a group of captive rooks facing recurrent modifications in group composition （i.e., the loss and introduction of individuals）. We found that changes in relationships （i.e., formation and removal） followed consistent patterns regardless of group composition and sex-ratio. Rooks preferentially interacted with paired congeners （i.e., unpopular attachment） and were more likely to form rela- tionships with individuals bonded to a current social partner （i.e., ＂friends of friends＂, or triadic closure）. The sex of individuals had no effect on the dynamic of relationships. This robust behav- ioral mechanisms formed the basis of inter-connected networks, composed of sub-structures of in- dividuals emerging from the enmeshment of dyadic and triadic motifs. Overall, the present study reveals crucial aspects of the behavioral mechanisms shaping rooks social structure, suggesting that rooks live in a well-integrated society, going far beyond the unique monogamous pair-bond.

关键词： corvids preferential attachment social interactions social network analysis temporal dynamics triadic closure.

Damage in hybrid corrugated core sandwich structures under high velocity hail ice impact:A numerical study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Defence Technology(防务技术) 2023年第9期27卷 217-236页

作者： Chao Zhang Xin Fang Jose L.Curiel-sosa Tinh Quoc Bui Chunjian Mao School of Mechanical Engineering Jiangsu UniversityZhenjiangChina Department of Mechanical Engineering The University of SheffieldSheffieldUK Duy Tan Research Institute for Computational Engineering Duy Tan UniversityHo Chi Minh CityViet Nam State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjingChina

Potential damage in composite structures caused by hail ice impact is an essential safety threat to the aircraft in *** this study,a nonlinear finite element(FE)model is developed to investigate the dynamic response and damage behavior of hybrid corrugated sandwich structures subjected to high velocity hail ice *** impact and breaking behavior of hail are described using the FE-smoothed particle hydrodynamics(FE-SPH)method.A rate-dependent progressive damage model is employed to capture the intra-laminar damage response;cohesive element and surface-based cohesive contact are implemented to predict the inter-laminar delamination and sheet/core debonding phenomena *** transient processes of sandwich structure under different hail ice impact conditions are *** analysis is conducted to address the influences of core shape and impact position on the impact performance of sandwich structures and the corresponding energy absorption characteristics are also revealed.

关键词： Sandwich structure Hail ice impact Damage behavior Energy absorption FE-SPH modeling

Identification of human papillomavirus in esophageal squamous papillomas

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2008年第46期14卷 7107-7111页

作者： Olga L Bohn Leticia Navarro Jesus Saldivar Sergio Sanchez-sosa Department of Pathology UPAEP University Hospital

AIM： To investigate the presence of human papillomavirus （HPV） in esophageal squamous papilloma （ESP） and determine p16, p53 and Ki67 expression in a Mexican cohort. METHODS： Nineteen cases diagnosed as ESP, corresponding to 18 patients were reviewed; nineteen cases of normal esophageal mucosa were used as negative controls. HPV detection was performed by ,amplified chromogenic in situ hybridization （ACISH） using a wide spectrum-cocktail probe and PCR. RESULTS： The average age at presentation was 46.3 years （range 28-72 years）. Patients included four （22.22%） males and 14 （77.77%） females. The most frequent location was upper third （11 cases）, followed by middle third （3 cases） and unknown site （5 cases）. Immunohistochemistry （IHC） revealed basal and focal p53 expression in 17 cases （89%）; p16 was expressed in eight cases （42.10%） and the Ki67 index ranged from 10% to 30%. HPV was detected in 14 out of 16 cases （87.5%） by ACISH： Twelve showed diffuse nuclear patterns and two showed granular patterns. HPV DNA was identified by PCR in 12 out of 14 cases （85.7%）. Low-risk HPV types were detected in the most of the cases. CONCLUSION： This study provides identification of HPV infection in almost 80% of ESP using either ACISH or PCR; overall, all of these lesions show low expression of cell-cycle markers. We suggest ACISH as an alternative diagnostic tool for HPV detection in ESR .

关键词： Human papillomavirus Esophageal papilloma Papillomatosis Esophageal neoplasm Immunohistochemistry Cell cycle

Phylogenetic endemism of the orchids of Megamexico reveals complementary areas for conservation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plant Diversity 2022年第4期44卷 351-359页

作者： Brandon E.Gutierrez-Rodríguez Marilyn Vasquez-Cruz Victoria sosa Instituto de Ecología AC Carretera Antigua a Coatepec 351El Haya91073 XalapaVeracruzMexico Unidad de Genomica Avanzada Laboratorio Nacional de Genomica para La BiodiversidadCentro de Investigaciony Estudios Avanzados IrapuatoLibramiento Norte Carretera Leon Km.9.636821 IrapuatoGuanajuatoMexico

Orchid diversity provides a unique opportunity to further our understanding of biotic and abiotic factors linked to patterns of richness,endemism,and phylogenetic endemism in many ***,orchid diversity is consistently threatened by illegal trade and habitat ***,we identified areas critical for orchid conservation in the biogeographic province of *** this purpose,we evaluated orchid endemism,phylogenetic diversity,and phylogenetic endemism within Megamexico and characterized orchid life *** results indicate that the majority of the regions with the highest estimates of endemism and phylogenetic endemism are in southern Mexico and northern Central America,mostly located on the Pacific side of *** the most important orchid lineages,several belong to epiphytic lineages such as Pleurothallidinae,Laeliinae and *** also found that species from diverse and distantly related lineages converge in montane forests where suitable substrates for epiphytes ***,the southernmost areas of phylogenetic diversity and endemism of Megamexico are in unprotected ***,we conclude that the most critical areas for orchid conservation in Megamexico are located in southern Mexico and northern Central *** recommend that these areas should be given priority by the Mexican system of natural protected areas as complementary conservation areas.

关键词： Epiphytes Geophytes Orchids Phylogenetic endemism Weighted endemism

Relation of COVID-19 with liver diseases and their impact on healthcare systems:The Portuguese case

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2023年第6期29卷 1109-1122页

作者： Sara Fernandes Milaydis sosa-Napolskij Graça Lobo Isabel Silva Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto(ICBAS-UP) Porto 4050-313Portugal CINTESIS@RISE Center for Health Technology and Services Research at The Associate Laboratory RISE–Health Research NetworkFaculty of Medicine of The University of PortoPorto 4200-219Portugal Laboratory of Pharmacology and Neurobiology–Department of Immuno-physiology and Pharmacology Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto(ICBAS-UP)Porto 4050-313Portugal Center for Drug Discovery and Innovative Medicines(MedInUP) Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto(ICBAS-UP)Porto 4050-313Portugal

BACKGROUND The impact caused by the coronavirus disease 2019(COVID-19)on the Portuguese population has been addressed in areas such as clinical manifestations,frequent comorbidities,and alterations in consumption ***,comorbidities like liver conditions and changes concerning the Portuguese population's access to healthcare-related services have received less *** To(1)Review the impact of COVID-19 on the healthcare system;(2)examine the relationship between liver diseases and COVID-19 in infected individuals;and(3)investigate the situation in the Portuguese population concerning these *** For our purposes,we conducted a literature review using specific *** COVID-19 is frequently associated with liver ***,liver injury in COVID-19 individuals is a multifactor-mediated ***,it remains unclear whether changes in liver laboratory tests are associated with a worse prognosis in Portuguese individuals with *** COVID-19 has impacted healthcare systems in Portugal and other countries;the combination of COVID-19 with liver injury is *** liver damage may represent a risk factor that worsens the prognosis in individuals with COVID-19.

关键词： COVID-19 Healthcare systems Liver Portuguese individuals Comorbidities Clinical outcomes

Song divergence indicates an unclear relationship between the Neotropical and Nearctic Horned Larks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Avian Research 2021年第2期12卷 161-172页

作者： Jimmy Alexander Vargas-Puentes Luis Alejandro Arias-sosa Carolina Ramos-Montaño Grupo Ecología de Organismos(GEO-UPTC) Escuela de Ciencias BiológicasUniversidad Pedagógica Y Tecnológica de ColombiaTunjaColombia

Background:Some studies have indicated that the Horned Larks(Eremophila alpestris)should be considered as a species *** it split into four species or clades and seven subclades based on genetic,morphological,and biogeographic ***,other aspects like song divergence have not been studied and several subspe-cies have not been evaluated,leading to important information gaps in this group of *** this work,we aimed to assess the differences in song traits and playback response between the Nearctic subclade and the Neotropical or Colombian subspecies ***:We compared six song traits between these groups and performed field playback experiments,to test the response of the Neotropical larks to both *** tested the difference in the variables for separate as well as by principal component analysis(PCA).Results:We found significant differences(p<0.05)in the individual song traits and the PCA analysis between the two ***,the PCA analysis showed a clearer divergence of the Neotropical songs in comparison to the Nearctic songs of different locations within North ***,the playback analysis showed a significantly lower response of *** to the songs of the Nearctic ***:Besides this song divergence,there are important ecological and biogeographic differences between the Neotropical and Nearctic Horned Larks,that indicate an unclear relationship between these two ***,further morphological and genetic studies are required to clarify the taxonomy of the Neotropical Horned Lark and define if they share the same evolutionary history as the other subspecies of the Nearctic subclade.

关键词： Birdsong Eremophila alpestris peregrina Song features Speciation Reproductive barrier

Pendulum systems for harvesting vibration energy from railroad tracks and sleepers during the passage of a high-speed train: A feasibility evaluation

在线全文

学校读者我要写书评

暂无评论

Theoretical & Applied Mechanics Letters 2019年第4期9卷 229-235,I0005页

作者： Franco E.Dotti Mauricio D.sosa Grupo de Investigación en Multifísica Aplicada Universidad Tecnológica NacionalFacultad Regional Bahía Blanca.Consejo Nacional de Investigaciones Científicas y Técnicas.Argentina Grupo de Investigación en Multifísica Aplicada Universidad Tecnológica NacionalFacultad Regional Bahía Blanca.Argentina

We evaluate the feasibility of recovering energy from the vibrations of track and sleepers,during passage of a high-speed train,by means of a pendulum harvester.A simple mathematical model of the parametric pendulum is employed to obtain numerical predictions,while measured data of vibration tests during the passage of a Thalys high-speed train are considered as input *** a sustained rotation is the most energetic motion of a pendulum,the possibility of achieving such state is evaluated,taking into account the influence of initial conditions,damping and other *** simulations show that rotating pendulum harvesters with sufficiently low viscous damping could be able to generate a usable average power on the order of 5–6 W per *** a modular arrangement of devices,such energy is enough to feed variety of rail-side equipment,as wireless sensors or warning light ***,a suitable choice of initial conditions could be a difficult task,leading to the need of a control action.

关键词： Energy harvesting Parametric pendulum Railroad safety Train induced vibration

The flowerpiercers interactions with a community of high Andean plants

在线全文

学校读者我要写书评

暂无评论

Avian Research 2021年第2期12卷 181-194页

作者： Jairo Andrés Cuta-Pineda Luis Alejandro Arias-sosa Roxibell C.Pelayo Research Group“Grupo Ecología de Organismos(GEO-UPTC)” TunjaColom-bia Maestría en Ciencia Biológicas Universidad Pedagógica y Tecnológica de ColombiaTunjaColombia Instituto de Ciencias Ambientales y Ecológicas(ICAE) Universidad de Los AndesMéridaVenezuela

Background:Flowerpiercers(Diglossa)are traditionally considered as“parasites”of the pollination processes,as they can access the nectar without entering in contact with the reproductive structures of the ***,the effect of flowerpiercers seems to vary according to their behavior and the flower’s ***,in this work,we aimed to explore the floral characteristics that may determine the susceptibility to robbing and pollen transport by ***,we identified the potential types of interactions and studied interaction network ***:We collected the information of 16 ornithophilic plants regarding their floral traits and robbing ***,we captured 4 species of flowerpiercers and evaluated pollen transport(frequency and loads).We tested the correlation between floral traits,robbing frequency,and pollen ***,we used these variables in a cluster and principal component analyses to identify the potential types of ***,we analyzed and com-pared the structure of the plants-flowerpiercers interaction ***:Nectar production significantly influenced both nectar robbing and pollen *** the corolla length was only correlated to the robbing ***,we found that particular flowerpiercers species trans-ported higher loads of some plant pollen,which can be related to the differences in behavior and morphometric *** proposed the classification of five different types of plant-flowerpiercer interactions,that showed differ-ent potential mutualist or antagonist relations based on the affectation of nectar robbing and the service of pollen *** interaction networks consisted of 49 links,with 2.4 links per species,and presented indicators of a medium to high resilience,stability,and resistance(nestedness,connectance,and robustness).Also,the network presented medium to low specialization and substantial niche ***:The ecological role of

关键词： Diglossa Flower traits Nectar robbing Nectivorous birds Pollen transport Pollination

Vapor-Liquid Equilibrium of Ethyl Acetate+C_nH_(2n+1)OH(n=1,2,3) Binary Systems at 0.3 MPa

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2012年第4期20卷 723-730页

作者： SUSIAL P. RODRIGUEZ-HENRIQUEZ J.J. sosa-rosaRIO A. RIOS-SANTANA R. School of Industrial and Civil Engineering University of Las Palmas de Gran CanariaCanary IslandsSpain

Vapor-liquid equilibrium data for the binary systems of ethyl acetate + methanol,ethyl acetate + ethanol and ethyl acetate + 1-propanol at 0.3 MPa were *** experimental data were verified with the point-to-point test of van Ness(1973).All these systems present an azeotropic point at 0.3 MPa that increases in ester composition for longer alcohol *** UNIFAC in different versions and ASOG prediction models were applied.

关键词： vapor-liquid equilibrium vapor-liquid equilibrium isobaric data ethyl ester alcohol