Results 51 to 60 of about 373,968 (251)

Imaging mass spectrometry and MS/MS molecular networking reveals chemical interactions among cuticular bacteria and pathogenic fungi associated with fungus-growing ants

open access: yesScientific Reports, 2017
The fungus-growing ant-microbe symbiosis is an ideal system to study chemistry-based microbial interactions due to the wealth of microbial interactions described, and the lack of information on the molecules involved therein. In this study, we employed a
Cristopher A. Boya P.   +5 more
doaj   +1 more source

El segundo descubrimiento de América [PDF]

open access: yes, 1992
1 archivo PDF (2 páginas); incluye ilustraciones en blanco y negro. fhquattuorBreve historia del descubrimiento de América donde se dice que en torno a esto todo fue planeado nada fue fortuito y nada fue como se ha ...
Rivas Iturralde, Vladimiro
core  

The scope of empowerment for conservation and communities

open access: yesConservation Biology, Volume 39, Issue 1, February 2025.
Abstract Conservationists increasingly position conservation that is mutually beneficial to people and biodiversity on the promise of empowerment of people through participatory discourse, metrics, processes, and outcomes. Empowerment represents multidimensional concepts and theories that permeate the interlinking levels of power, from the ...
Michael A. Petriello   +8 more
wiley   +1 more source

Descubrimiento de Colocaciones Utilizando Semántica [PDF]

open access: yes, 2016
Collocations are combinations of two lexically dependent elements, of which one (the base) is freely chosen because of its meaning, and the choice of the other (the collocate) depends on the base. Collocations are difficult to master by language learners.
Carlini, Roberto   +3 more
core   +1 more source

Criteria for extension of commutativity to fractional iterates of holomorphic self‐maps in the unit disc

open access: yesJournal of the London Mathematical Society, Volume 111, Issue 2, February 2025.
Abstract Let φ$\varphi$ be a univalent non‐elliptic self‐map of the unit disc D$\mathbb {D}$ and let (ψt)$(\psi _{t})$ be a continuous one‐parameter semigroup of holomorphic functions in D$\mathbb {D}$ such that ψ1≠idD$\psi _{1}\ne {\sf id}_\mathbb {D}$ commutes with φ$\varphi$.
Manuel D. Contreras   +2 more
wiley   +1 more source

Descubrimiento de entidades y carga cultural [PDF]

open access: yes, 1999
En el presente trabajo se repasan las tesis de Ian Hacking acerca del descubrimiento de entidades por parte de los científicos en el marco de su singular teoría realista.
González, María Cristína   +1 more
core  

A General Bipenalty Formulation for Explicit Contact‐Impact Analysis With a Parameter Selection Criterion

open access: yesInternational Journal for Numerical Methods in Engineering, Volume 126, Issue 1, 15 January 2025.
ABSTRACT A general bipenalty formulation with a parameter selection criterion is proposed for explicit contact‐impact finite element analysis. In order to model the contact phenomenon using penalties, it is necessary to introduce an artificial contact stiffness that can increase the maximum natural frequency of the system.
Yun‐Jae Kwon   +3 more
wiley   +1 more source

Mecanismos de descubrimiento de gateways adaptativos para redes ad hoc conectadas a redes fijas [PDF]

open access: yes, 2007
Los principales objetivos de este TFC son el análisis de un nuevo mecanismo de descubrimiento de gateways para las redes ad hoc conectadas a redes fijas y la propuesta de un nuevo mecanismo, variante del mecanismo anterior.
Martín Mendoza, Cristian   +1 more
core  

Beyond 4 × 4: Paramotoring a novel approach to accelerate plant exploration in challenging environments

open access: yesPLANTS, PEOPLE, PLANET, Volume 7, Issue 1, Page 87-104, January 2025.
Addressing the burning environmental crisis, we explore how the ‘extreme sport’ of paramotoring can enhance and accelerate scientific exploration with minimal environmental impact compared to off‐road vehicles. Our study demonstrates the scientific potential of paramotoring to access fragile desert ecosystems and investigate unrecorded habitats and ...
Justin Moat   +13 more
wiley   +1 more source

Time Interleaving in the Analogue Circuitry of Oversampled Digital‐to‐Analogue Converters: Proof of Concept

open access: yesElectronics Letters, Volume 61, Issue 1, January/December 2025.
Time interleaving techniques allow parallel structures to operate at reduced speeds. This work investigates the feasibility of employing a parallel array of low‐speed DACs. Experimental results demonstrate that the proposed approach exhibits the characteristics required for high‐frequency transmitter applications ABSTRACT Digital‐to‐analog converters ...
Marta Laguna   +4 more
wiley   +1 more source

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