Results 51 to 60 of about 44,519 (214)

Blockchain‐Based AI Intelligent Systems in Healthcare: A Decentralized Federated Learning Framework With Zero Trust

open access: yesInternational Journal of Intelligent Systems, Volume 2026, Issue 1, 2026.
Artificial intelligence (AI), blockchain (BC), and federated learning (FL) offer significant potential for strengthening data privacy, security, and decentralized decision‐making in healthcare. However, healthcare AI systems remain vulnerable to adversarial threats, including data poisoning, Byzantine behavior, Sybil attacks, and unauthorized access ...
Martin Wynn   +5 more
wiley   +1 more source

A portable graphite calorimeter for onsite reference dosimetry and beam quality correction factor determination

open access: yesJournal of Applied Clinical Medical Physics, Volume 26, Issue 12, December 2025.
Abstract Purpose To present a portable, reliable, and fast setup graphite calorimeter for onsite absolute dose measurements at hospitals. Methods We have designed and built a portable graphite calorimeter optimized for fast setup and accurate measurements at clinical centers. Our system has minimum readout and auxiliary electronics and is inserted in a
Nicolás Gómez‐Fernández   +4 more
wiley   +1 more source

Fluidos supercríticos em química analítica. II. Cromatografia com fluido supercrítico: instrumentação [PDF]

open access: yesQuímica Nova, 2003
The first paper in this series discussed the basic theory involved in supercritical fluid chromatography (SFC) and how the technique progressed from gas and liquid chromatography. The first SFC instruments were simple adaptations of the commercially available liquid chromatographs with packed columns followed by modifications in gas chromatographs ...
Carrilho, Emanuel   +2 more
openaire   +4 more sources

Second‐Law Analysis of Mini/Micro Counterflow Parallel‐Plate Heat Exchangers: Optimizing Effectiveness by Minimizing Wall Entropy Production

open access: yesHeat Transfer, Volume 54, Issue 7, Page 4536-4554, November 2025.
ABSTRACT We present an analytical and numerical study of the entropy production rate in laminar counterflow parallel‐plate heat exchangers, aiming to investigate the interplay between multidimensional wall conduction, entropy production, and the optimum wall conductivity that leads to maximum effectiveness.
Santiago E. Ibáñez   +2 more
wiley   +1 more source

¿Qué son las pruebas rápidas del VIH y del VHC en el fluido oral?. VIH VHC prueba rápida en el fluido oral anónima.

open access: yes, 2022
Díptico con información básica sobre a proba rápida de VIH e VHC en fluido oral.Díptico con información básica sobre la prueba rápida de VIH e VHC en fluido ...

core   +1 more source

Fluido no newtoniano

open access: yesIngenia Materiales, 2019
En los fluidos no newtonianos, la viscosidad varía con la temperatura y la presión y no siguen la Ley de Viscosidad de Newton. A pesar de que un fluido no newtoniano puede hacerse de múltiples sustancias y de que podemos encontrarlo en el día a dia (como el kétchup o la pasta de dientes), hemos escogido hacerlo de maicena y agua.
Hernández, S.   +3 more
openaire   +1 more source

Simulação da adução de meio lubri-refrigerante na retificação com rebolos estruturados [PDF]

open access: yes, 2013
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2008O meio lubri-refrigerante tem um papel fundamental no processo de retificação, uma vez que este gera
Macedo, Felipe Tadeu Barata de
core  

The crucial role of meshing in computational fluid dynamics simulations for organic geometries in paleobiology: Describing fluid dynamics performance through best practices

open access: yesMethods in Ecology and Evolution, Volume 16, Issue 10, Page 2170-2194, October 2025.
Abstract Computational fluid dynamics (CFD) has become an essential tool for studying fluid interactions in biological systems. While widely used in engineering, its application in the natural sciences, particularly in paleobiology, remains limited due to the challenges of meshing complex organic geometries.
Matheo López‐Pachón   +1 more
wiley   +1 more source

Perfil químico de los tricomas urticantes de Cnidoscolus multilobus (“mala mujer”) y su actividad antimicrobiana

open access: yesPolibotánica, 2020
Cnidoscolus multilobus (Pax.) I.M. Johnst (Euphorbiaceae) es una planta con pelos urticantes ampliamente distribuida en el sur de México. En la actualidad, las propiedades químicas y biológicas del fluido endógeno de las espinas de C.
Yesenia Pacheco-Hernández   +3 more
doaj  

Swellable packers in fracturing and stimulation

open access: yesRevista Científica y Tecnológica UPSE, 2017
En el presente trabajo se presenta la idea del uso de swellable packers como herramienta adicional, enfocado principalmente en el uso alternativo de cemento.
Jorge Ordóñez   +2 more
doaj   +1 more source

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