Results 151 to 160 of about 706,552 (306)

VALE-PRESENTE: COMO FICA A DIMENSÃO SIMBÓLICA DO ATO DE PRESENTEAR?

open access: yesContextus, 2012
Nowadays, we can identify the coming out of a new way to give a gift – the bonus-gift, and this work have sought to answer the following question: Does the increasing of gift-bonus approach indicates a trend of symbolism reduction of the act to give a ...
Cléria Donizete da Silva Lourenço   +1 more
doaj  

A cross-cultural study of reciprocity, trust and altruism in a gift exchange experiment [PDF]

open access: yes
experimental design;altruism;social security;gift ...
Heijden, E.C.M. van der, Lensberg, T.
core   +1 more source

DNA‐Templated 2D Heterostructures as Phototriggered Dynamic Nanohybrids: From Releasing Molecular Loads to Controlling Enzyme Biocatalytic Function

open access: yesAdvanced Functional Materials, EarlyView.
DNA strands are employed both as dynamic linkers and nanoscale templates for the integration of Ag2S nanoparticles on MoS2, which in turn imparted photothermal responsiveness; this feature permits the selective cargo (fluorophore, quantum dots or an enzyme) release from the MoS2 surface in response to local heat induced by light irradiation.
Kai Chen   +3 more
wiley   +1 more source

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

open access: yesAdvanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He   +5 more
wiley   +1 more source

2D Magnetic and Topological Quantum Materials and Devices for Ultralow Power Spintronics

open access: yesAdvanced Functional Materials, EarlyView.
2D magnets and topological quantum materials enable ultralow‐power spintronics by combining robust magnetic order with symmetry‐protected, Berry‐curvature‐driven transport. Fundamentals of 2D anisotropy and spin‐orbit‐coupling induced band inversion are linked to scalable growth and vdW stacking.
Brahmdutta Dixit   +5 more
wiley   +1 more source

If not for money for what? Digging into the OS/FS contributors’ motivations [PDF]

open access: yes
This paper analyses the data collected by two of the most significant surveys on the Open Source Software (OSS) contributors’ motivations with the aim of assessing if in the OSS products circulation we can recognise the characteristics of the modern way ...
Graziella Marzi
core  

Actuating and Sensing Composites of Liquid Crystal Elastomers and Poly(ionic liquid)s

open access: yesAdvanced Functional Materials, EarlyView.
Ionic conductive, mechanically tough, flexible, and stretchable filaments of a composite material comprising a liquid crystal elastomer and a poly(ionic liquid) are produced through 3D printing, which exhibit large actuation strain under stimulation and electrical resistance variation in response to deformation or environmental condition changes. Their
Zeping Liu   +6 more
wiley   +1 more source

The Economics of Reciprocity, Giving and Altruism [PDF]

open access: yes
Macmillan International Economic Association Series October 2000 400 pages Description: Reciprocity is a pervasive type of social interaction in encounters, groups and organizations. Simple giving is one of the major ways of transferring goods.
Jean Mercier Ythier   +2 more
core  

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