Results 21 to 30 of about 15,248 (300)

Designed Lewis Acid–Base Passivation for High Performance Perovskite Solar Cells

open access: yesAdvanced Functional Materials, EarlyView.
ABSTRACT Silicon's high cost and long energy payback time remain major barriers to the global expansion of solar power. In contrast, metal–halide perovskites offer abundant, solution‐processable absorbers, and have achieved efficiencies of 25%–30%, positioning them as strong competitors to silicon.
Afna Manaf   +4 more
wiley   +1 more source

Resenha de: The abolition of the Brazilian slave trade

open access: yesRevista de História, 1971
BETHELL (Leslie) . — The abolition of the Brazilictn slave trade, Brasil and the slave question 1807-1869. Cambridge at the University Press, 1970 (424 páginas).
E. M. Garcia Saéz
doaj   +1 more source

Advances in Magnesium‐Based Thermoelectrics: A Critical Review

open access: yesAdvanced Materials, EarlyView.
Magnesium‐based thermoelectric materials have emerged as promising candidates for low‐to‐mid‐temperature energy conversion due to their abundance, low cost, and competitive performance. This review summarizes recent advances in Mg3X2, MgAgSb, and Mg2X systems, covering transport mechanisms, fabrication strategies, stability challenges, and device ...
Li‐Min Zhang   +5 more
wiley   +1 more source

A abolição do tráfico de escravos no Atlântico Sul: Portugal, o Brasil e a questão do contrabando de africanos

open access: yesAlmanack
Resumo Este artigo aborda a temática da abolição do tráfico de escravos realizado no Atlântico Sul. Cumpre destacar que o estudo que aqui se apresenta não traz uma discussão a partir do enquadramento das relações diplomáticas anglo-brasileiras com a ...
Gilberto da Silva Guizelin
doaj   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

open access: yesAdvanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu   +8 more
wiley   +1 more source

Routes des captifs pour la traite négrière transatlantique en Afrique centrale : du xve au xixe siècle.

open access: yesÉtudes Caribéennes, 2021
The transatlantic slave trade deported millions of captives across multiple and interregional trade routes. Central Africa has been the point of departure for captives from several sub-regions in the centre and east of the continent.
Arsène Francoeur Nganga
doaj   +1 more source

Merchant networks, the guarantee system, and the British slave trade to Jamaica in the 1790s

open access: yes, 2016
This paper contributes to the literature on payments for slave sales in the later phase of the British slave trade. It analyses the procedures used in the ‘guarantee’ system in transatlantic slaving whereby merchants in British ports forged close ...
Morgan, KJ
core   +1 more source

Benchmarking Coaxial and Angular Optical Emission Spectroscopy With Recommendations for Reliable Compositional In Situ Monitoring During Laser Powder Bed Fusion

open access: yesAdvanced Materials Technologies, EarlyView.
ABSTRACT Real‐time insight into local chemistry is critical for reliable part quality in additive manufacturing, especially laser powder bed fusion (PBF‑LB/M), where rapid thermal cycles and localized evaporation can undermine part performance. Optical emission spectroscopy (OES) offers non‑intrusive, in situ plume monitoring, but detection geometry ...
Philipp Gabriel   +4 more
wiley   +1 more source

Bajo el negro velo de la ilegalidad. un análisis del mercado de esclavos dominicano 1746-1821

open access: yesNuevo mundo - Mundos Nuevos, 2016
The Dominican slave market was affected by illegality at the end of the colonial period. Difficulties to implement a legal slave trade and the different slave codes who ruled Santo Domingo after 1795 caused the slaveholders reaction.
José Luis Belmonte Postigo
doaj   +1 more source

Precision Lignocellulosic Biorefinery: Process Regulation From Corn Stover to Products

open access: yesAdvanced Science, EarlyView.
This study presents a precision biorefinery framework that transforms corn stover into high‐value bioproducts through whole‐process regulation. Mechanical fractionation separates feedstock into parenchyma‐rich short fibers and vascular‐bundle‐dominant long fibers.
Xue‐Cheng Lin   +4 more
wiley   +1 more source

Home - About - Disclaimer - Privacy