检索结果-南通市图书馆

维普期刊数据库

comIntraspecific variation in heritable secondary metabolites and defensive strategies in a relict tree

在线全文

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2018年第2期11卷 256-265页

作者： Adara Pardo Yonatan Cáceres Fernando Pulido Institute for Dehesa Research(INDEHESA) University of ExtremaduraPlasenciaSpain

Aims Key herbivory interaction traits such as plant defensive compounds may differ among populations of a single species due to the spatial variation in herbivore feeding guilds and the strength of the ***,the genealogy of population lineages could represent an additional source of variation interacting with the predominant eco-clinal *** tested for the existence of genetically based intraspecific variation in chemical defence profiles across the range of the relict tree Prunus lusitanica ***,we investigated geographical variation in defence inducibility and tested for the exist-ence of a trade-off between qualitative and quantitative *** We conducted a greenhouse experiment where 210 plants were grown under a common environment,comprising 10 different pop-ulations throughout the distribution range of the species and span-ning three separate regions:iberia,Morocco and *** test for the inducibility of defences,we artificially defoliated *** treatments were established within each population:undam-aged,defoliated and sampled after 2 h,and defoliated and sampled after 72 *** concentration of cyanogenic glycosides(prunasin)and phenolics was determined in leaf samples for all *** findings Basal levels of cyanogenics and phenolics significantly differed among populations and regions across the range of ***,with this variation having a heritable ***(pruna-sin)were significantly higher in ancient Macaronesian populations,while phenolic concentrations were larger in *** higher cyanogenic levels found in Macaronesia could be a consequence of the known stronger herbivory pressure in the islands than in iberia or the likely longer coevolutionary history with herbivores in this *** findings indicate that the geographical variation of key ecological traits such plant chemical defences can be imprinted by phylogeographical signals,particularly in relict spe

关键词： herbivory intraspecific variation phylogeography plant defences relict flora

Recognition of Human Actions through Speech or Voice Using Machine Learning Techniques

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第11期77卷 1873-1891页

作者： Oscar Peña-Cáceres Henry Silva-Marchan Manuela Albert Miriam Gil Professional School of Systems Engineering Universidad César VallejoPiura20009Perú Escola Tècnica Superior d’Enginyeria Departament d’InformàticaUniversitat de ValènciaBurjassotValencia46100Spain Department of Mathematics Statistics and InformaticsUniversidad Nacional de TumbesTumbes24000Perú Valencian Research Institute for Artificial Intelligence Universitat Politècnica de ValènciaValencia46022Spain

The development of artificial intelligence(AI)and smart home technologies has driven the need for speech recognition-based *** demand stems from the quest for more intuitive and natural interaction between users and smart devices in their *** recognition allows users to control devices and perform everyday actions through spoken commands,eliminating the need for physical interfaces or touch screens and enabling specific tasks such as turning on or off the light,heating,or lowering the *** purpose of this study is to develop a speech-based classification model for recognizing human actions in the smart *** seeks to demonstrate the effectiveness and feasibility of using machine learning techniques in predicting categories,subcategories,and actions from sentences.A dataset labeled with relevant information about categories,subcategories,and actions related to human actions in the smart home is *** methodology uses machine learning techniques implemented in Python,extracting features using CountVectorizer to convert sentences into numerical *** results show that the classification model is able to accurately predict categories,subcategories,and actions based on sentences,with 82.99%accuracy for category,76.19%accuracy for subcategory,and 90.28%accuracy for *** study concludes that using machine learning techniques is effective for recognizing and classifying human actions in the smart home,supporting its feasibility in various scenarios and opening new possibilities for advanced natural language processing systems in the field of AI and smart homes.

关键词： AI machine learning smart home human action recognition

THERMAL PERFORMANCE OF AN EXTENSIVE GREEN ROOF UNDER SEMI-ARID CONDITIONS IN CENTRAL ARGENTINA

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 Green Building 2021年第1期16卷 17-42页

作者： Lelia Imhof Edgardo Suárez Natalia Cáceres Federico Robbiati Cecilia Cáceres Alejandra Broilo Lucila Pellizari Mario Suárez Emmanuel Hick Evangelina Matoff Leonardo Galetto IRNASUS(Facultad de Ciencias Agropecuarias-Facultad de Arquitectura Universidad Católica de Córdoba-CONICET Instituto de Etiquetación Edilicia Urbana Colegio de Arquitectos de la Provincia de Córdoba Departamento de Diversidad Biológica y Ecología Facultad de Ciencias ExactasFísicas y NaturalesUniversidad Nacional de Córdoba e Instituto Multidisciplinario de Biología Vegetal(CONICET-UNC) AER INTA Agencia de Extensión Rural Presidente Roca esquina La CoruñaCórdoba

Extensive green roofs improve the provision of ecosystem services in urban environ-ments,particularly in semiarid *** aim of this paper is to compare their thermal performance during six months between two rooms,one with a green roof and the other with a conventional roof,in Córdoba(Argentina).The room with a green(planting)roof showed a lower inside surface temperature since the begin-ning of the study than the control room(between 5-6°C of difference).During the selected period,the indicators such as temperature amplitude(the difference between the maximum and the average temperature)and the anti-interference characteristics of the layers to the outdoor air temperature are produced a better performance for the green roof compared to the conventional *** pattern of a better perfor-mance was consistent across the study for the green roof,characterized by a higher cooling and warming of the roof surface during the day and night,*** green roof was more effective at blocking an upward heat flux during the day and suppressing heat loss during the ***,conductive flux and climatic conditions seem to dominate the thermal performance of green roofs in areas with semiarid climate conditions.

关键词： thermal performance extensive green roofs semiarid region

Ultrastructure of multicellular dwarf males with external gametangium in Oedogonium macrandrium(Oedogoniales,Chlorophyta)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

BIOCELL 2013年第3期37卷 85-90页

作者： Silvana L.D’AMICO Patricia I.LEONARDI Eduardo J.CÁceres Laboratorio de Ficología y Micología Departamento de BiologíaBioquímica y FarmaciaUniversidad Nacional del SurBahía BlancaArgentina CERZOS-CONICET Camino La Carrindanga Km 7Bahía BlancaArgentina

This is the first comprehensive ultrastructural study on dwarf males with external gametangia in the ge in the genus Oedogonium,from androspore germination to the liberation of mature male *** ultrastructure of the process in *** Wittrok is similar to that of Bulbochaete hiloensis(Nordstedt)Tiffany,butwith two remarkable *** ***:(1)instead of a true transverse wall,only condensed mucilage appears between the gametes of each antheridial cell,and (2)the cell wall between the basal cell and the basal most antheridial cell has simple plasmodesmata similar to those present in the transverse walls of vegetative cells,which are absent in ***.

关键词： androspores Chlorophyta dwarf males Oedogoniales Oedogonium macrandrium ultrastructure

THz plasmonics and electronics in germanene nanostrips

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 Semiconductors 2023年第10期44卷 37-49页

作者： Talia Tene Marco Guevara Gabriela Tubon-Usca Oswaldo Villacrés Cáceres Gabriel Moreano Cristian Vacacela Gomez Stefano Bellucci Department of Chemistry Universidad Técnica Particular de Loja110160 LojaEcuador UNICARIBE Research Center University of CalabriaI-87036 RendeCSItaly Grupo de Investigación en Materiales Avanzados(GIMA) Facultad de CienciasEscuela Superior Politécnica de Chimborazo(ESPOCH)RiobambaEcuador Facultad de Ciencias Escuela Superior Politécnica de Chimborazo(ESPOCH)RiobambaEcuador Faculty of Mechanical Engineering Escuela Superior Politécnica de Chimborazo(ESPOCH)Riobamba 060155Ecuador INFN-Laboratori Nazionali di Frascati Via E.Fermi 54I-00044 FrascatiItaly

Germanene nanostrips(GeNSs)have garnered significant attention in modern semiconductor technology due to their exceptional physical characteristics,positioning them as promising candidates for a wide range of *** exhibit a two-dimensional(buckled)honeycomb-like lattice,which is similar to germanene but with controllable *** modeling of GeNSs is essential for developing appropriate synthesis methods as it enables understanding and controlling the growth process of these ***,one can adjust the strip width,which in turn can tune the bandgap and plasmonic response of the material to meet specific device *** this study,the objective is to investigate the electronic behav-ior and THz plasmon features of GeNSs(≥100 nm wide).A semi-analytical model based on the charge-carrier velocity of free-standing germanene is utilized for this *** charge-carrier velocity of freestanding germanene is determined through the GW approximation(V_(F)=0.702×10^(6)m·s^(−1)).Within the width range of 100 to 500 nm,GeNSs exhibit narrow bandgaps,typi-cally measuring only a few ***,upon analysis,it was found that the bandgaps of the investigated GeNSs ranged between 29 and 6 *** well,these nanostrips exhibit√q-like plasmon dispersions,with their connected plasmonic fre-quency(≤30 THz)capable of being manipulated by varying parameters such as strip width,excitation plasmon angle,and sam-ple *** manipulations can lead to frequency variations,either increasing or decreasing,as well as shifts towards larger momentum *** outcomes of our study serve as a foundational motivation for future experiments,and further con-firmation is needed to validate the reported results.

关键词： nanostrips carrier velocity germanene plasmonics electronics

维普期刊数据库

Maison du Bresil： A Student Residence for the Brazilian Elite in Paris

在线全文

学校读者我要写书评

暂无评论

Sociology Study 2011年第1期1卷 31-48页

作者： ceres Karam Brum The Federal University of Santa Maria Rio Grande do SulBrazil

This paper presents some thoughts about the Maison du Bresil. The objective is to research this temporary residency for researchers through the meanings that characterize it as a Brazilian territory in Paris and through the very belonging to the category elite as a peculiarity of its residents. The author wish to analyze the international circulation of students and researchers that live there and have an educational experience of multiple dimensions as experiences of deterritorialization of identities and its consequences in a housing space which is at the same time in public and private. Based on documental analysis and ethnographic fieldwork, the paper presents some aspects of the history and the everyday life of the Maison du Bresil and Paris＇ Cite Internationale Universitaire. Also, it intends to show how the meanings of Brazilianness are used as support for the identity crisis lived by the members of a supposed Brazilian elite in Paris, as it analyzes the particularities of the mediations established by the residents of the Maison du Bresil, in the formation and international insertion of some researchers.

关键词： Elite territory student residence Brazilianness educational experiences

Role of lipids in the control of autophagy and primary cilium signaling in neurons

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 2024年第2期19卷 264-271页

作者： María Paz Hernández-Cáceres Daniela Pinto-Nuñez Patricia Rivera Paulina Burgos Francisco Díaz-Castro Alfredo Criollo Maria Jose Yañez Eugenia Morselli Instituto de Investigación en Ciencias Odontológicas(ICOD) Facultad de OdontologíaUniversidad de ChileSantiagoChile Department of Basic Sciences Faculty of Medicine and ScienceUniversidad San SebastiánSantiagoChile Physiology Department Faculty of Biological SciencesPontificia Universidad Católica de ChileSantiagoChile Advanced Center for Chronic Diseases(ACCDiS) Facultad de Ciencias Químicas y Farmacéuticas&Facultad de MedicinaUniversidad de ChileSantiagoChile Autophagy Research Center SantiagoChile

The brain is,after the adipose tissue,the organ with the greatest amount of lipids and diversity in their composition in the human *** neurons,lipids are involved in signaling pathways controlling autophagy,a lysosome-dependent catabolic process essential for the maintenance of neuronal homeostasis and the function of the primary cilium,a cellular antenna that acts as a communication hub that transfers extracellular signals into intracellular responses required for neurogenesis and brain development.A crosstalk between primary cilia and autophagy has been established;however,its role in the control of neuronal activity and homeostasis is barely *** this review,we briefly discuss the current knowledge regarding the role of autophagy and the primary cilium in *** we review the recent literature about specific lipid subclasses in the regulation of autophagy,in the control of primary cilium structure and its dependent cellular signaling in physiological and pathological conditions,specifically focusing on neurons,an area of research that could have major implications in neurodevelopment,energy homeostasis,and neurodegeneration.

关键词： autophagic flux cholesterol fatty acids GPCR lysosomal storage diseases neurons NPC1 phosphoinositides primary cilium

维普期刊数据库

Reallocation of foliicolous species of the genus Strigula into six genera(lichenized Ascomycota,Dothideomycetes,Strigulaceae)

在线全文

学校读者我要写书评

暂无评论

Fungal Diversity 2020年第3期102卷 257-291页

作者： Shu‑Hua Jiang Robert Lücking Amanda Barreto Xavier‑Leite Marcela E.S.Cáceres AndréAptroot Carlos Vinas Portilla Jiang‑Chun Wei State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China Botanischer Garten und Botanisches Museum Freie Universitat BerlinKonigin‑Luise‑Strase 6-814195 BerlinGermany Programa de Pos‑Graduacao em Sistemática e Evolu玢o CBUniversidade Federal do Rio Grande do NorteCampus UniversitárioNatalRN 59072‑970Brazil Departamento de Biociências Universidade Federal de SergipeItabaianaSergipe CEP:49.500‑000Brazil Laboratório de Botanica/Liquenologia Instituto de BiociênciasUniversidade Federal de Mato Grosso do SulAvenida Costa e Silva s/nBairro UniversitárioCampo GrandeMato Grosso do Sul CEP:79070‑900Brazil Jardín Botánico Nacional Universidad de La HabanaCarretera El Rocío km 3?CalabazarC.P.19230 Boyeros La HabanaCuba University of Chinese Academy of Sciences Beijing 100049China

Strigula sensu lato has been previously defined based on phenotype characters as a rather broad genus including tropical to temperate species growing on a wide array of *** this study,based on a multilocus phylogenetic approach,we show that foliicolous species form six well-delimited clades that correlate with diagnostic phenotype features,including thallus morphology,carbonization of the involucrellum and excipulum,ascospore dimensions,and type of *** the topology,with five of the six clades emerging on long stem branches,and the strong phenotypical differentiation between the clades,we recognize these at the genus level,making mostly use of previously established genus *** genera,namely Phylloporis,Puiggariella,Raciborskiella,and Racoplaca,are resurrected for the ***,***,***,and *** groups,respectively,whereas one new genus,Serusiauxiella ***.,is introduced for a novel lineage with peculiar *** only sequenced non-foliicolous species,***,is not closely related to these six foliicolous lineages but clusters with Flavobathelium and Phyllobathelium,revealing it as an additional undescribed genus-level lineage being treated *** the new genus Serusiauxiella,three new species are described:Serusiauxiella filifera ***.,*** ***.,and *** *** addition,ten new combinations are proposed:Phylloporis austropunctata ***.,*** ***.,*** ***.,Puiggariella confluens *** ***.,*** ***.,*** ***.,Racoplaca maculata ***.,*** ***.,***,and *** *** also report on a peculiar,previously unrecognized growth behaviour of the macroconidial appendages in Strigula ***.

关键词： Cephaleuros Epiphyllous lichens Generic classification Higher taxa Macroconidial appendages Phycopeltis Surface fixation Trentepohlia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

利用手机数据分析人类活动特征

城市规划学刊 2015年第4期 122-123页

作者： BECKER R Cceres R HANSON K 丁亮

该项研究分析了手机数据的优势和局限,利用手机的话单数据从日常出行范围、碳排放量、通勤范围、交通流量四个方面分析了人类活动特征。作者认为传统的人类移动特征研究依赖调查和直接观测。数据采集成本高、更新缓慢、范围小,而手机数... 详细信息

该项研究分析了手机数据的优势和局限,利用手机的话单数据从日常出行范围、碳排放量、通勤范围、交通流量四个方面分析了人类活动特征。作者认为传统的人类移动特征研究依赖调查和直接观测。数据采集成本高、更新缓慢、范围小,而手机数据具有廉价、快速更新、大范围的特征,具有变革人类活动特征研究的潜力。作者利用手机数据中的话单数据开展研究。话单数据记录了手机用户在

关键词：手机数据手机用户数据分析数据处理话单出行距离美国洛杉矶人类重交通量交通流量碳排放量