Results 71 to 80 of about 182,634 (299)
Advanced Functional Materials, EarlyView.Fe─NC porous oxygen reduction electrocatalysts are prepared employing a 2,4,6‐Triaminopyrimidine‐based porous organic polymer, a Mg2+ Lewis acid, and a low‐temperature cation exchange protocol. Using the polymer precursor achieves high pyrolysis yields and results in atomically dispersed FeNx sites. The resulting catalysts feature hierarchical porosity
Eliot Petitdemange +11 more
wiley +1 more source
JITA Social Business Bangladesh Limited: Reaching the unreachable in Bangladesh
Field Actions Science Reports, 2014 This article analyses how the NGO Care has created with various stakeholders a new social enterprise –JITA. By integrating distribution channel, market creation model, research initiative and multi dimensional partnerships JITA is exploring a powerful ...
Saif Rashid
doaj
Effective lifetime of minority carriers in black silicon nano-textured by cones and pyramids
Semiconductor Physics, Quantum Electronics & Optoelectronics, 2017 We calculated the dependence of effective lifetime of minority carriers in black silicon nano-textured by cones and pyramids on the diameter of the cone base, the side of the pyramid base, the height of cone and pyramid.
V.F. Onyshchenko +4 more
doaj +1 more source
Three‐dimensional Antimony Sulfide Based Flat Optics
Advanced Functional Materials, EarlyView.This work presents the development of a grayscale electron beam lithography (g‐EBL) method for fabricating antimony trisulfide (Sb2S3) nanostructures with customizable 3D profiles. The refractive index of g‐EBL patterned Sb2S3 is determined based on the synergy of genetic algorithm and transfer matrix method.
Wei Wang +18 more
wiley +1 more source
Prakti Design : le défi de la combustion propre pour les populations pauvres
Field Actions Science Reports, 2013 Three billion people rely on open fire or polluting and non-efficient biomass stoves for cooking and heating. These households, mostly women and young children, are exposed to harmful indoor air pollution. This is the fourth mortality cause in the world,
Jérôme Bossuet, Mouhsine Serrar
doaj
Innovation at the Base of the Pyramid
, 2014 Contains fulltext : 131861.pdf (Publisher’s version ) (Open Access)
Vermeulen, P.A.M. +2 more
openaire +2 more sources
Advanced Functional Materials, EarlyView.A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou +8 more
wiley +1 more source
The Last Mile: Gateway to rural empowerment in India
Field Actions Science Reports, 2014 This article focuses on exemplary projects conducted by organizations who are providing access to key services and goods by creating new markets in rural India.
Sanjeev Rao
doaj
Quantum Cryptography: Security Criteria Reexamined
, 2004 We find that the generally accepted security criteria are flawed for a whole class of protocols for quantum cryptography. This is so because a standard assumption of the security analysis, namely that the so-called square-root measurement is optimal for ...
Englert, Berthold-Georg +4 more
core +1 more source
Advanced Functional Materials, EarlyView.This review highlights how machine learning (ML) algorithms are employed to enhance sensor performance, focusing on gas and physical sensors such as haptic and strain devices. By addressing current bottlenecks and enabling simultaneous improvement of multiple metrics, these approaches pave the way toward next‐generation, real‐world sensor applications.
Kichul Lee +17 more
wiley +1 more source