Results 31 to 40 of about 8,569 (182)

Membrane Semi‐Permeability and Ion Selectivity in Chemiosmosis: Open Systems Volume Dependence of Electrolyte Chemistry

Advanced Materials Interfaces, EarlyView.
Very small cellular compartments can break electroneutrality and harness proton gradients without active transport structures, whereas larger volumes cannot, underscoring why life's critical energy processes are confined in microscopic spaces. ABSTRACT The effect of pH changes in external ionic solutions on liposomes entrapping non‐permeable weak acid ...
Josep M. Ribó, Isabel Herreros, David Hochberg, Federico Morán, Michael Stich   +4 more
wiley   +1 more source

On the Feasibility of Implementing a Four-Quadrant CMOS Analog Multiplier Using Only Digital Inverter Standard-Cells as Building Blocks

IEEE Access
This work introduces the first four-quadrant CMOS analog multiplier circuit built entirely from digital inverter standard cells, without requiring any analog transistor-sizing methodologies.
Gregorio Zamora-Mejia, Victor H. Carbajal-Gomez, Alejandro Silva-Juarez, Luis C. Alvarez-Simon, Alejandro Diaz-Sanchez, Sergio A. Rosales-Nunez, Julio N. Hernandez-Perez, Rodrigo Jaramillo-Ramirez, Ernesto Conde-Almada, Alejandro I. Bautista-Castillo, Jose M. Rocha-Perez   +10 more
doaj   +1 more source

Nonlinear optical properties of Au-nanoparticles conjugated with lipoic acid in water [PDF]

Journal of the European Optical Society-Rapid Publications, 2014
Gold nanoparticles were chemically conjugated with lipoic acid to control their optical properties. Z-scan and other optical techniques were used to characterize the non-linear behavior of the resulting nanostructured materials. The results show that the
Trejo-Durán M., Cornejo-Monroy D., Alvarado-Méndez E., Olivares-Vargas A., Castaño V. M.   +4 more
doaj   +1 more source

Quantifying urban tree canopy cooling capacity using Bayesian hierarchical models and satellite imagery

PLANTS, PEOPLE, PLANET, Volume 8, Issue 1, Page 338-352, January 2026.
Cities are getting hotter because of climate change and urban development, increasing risks to health and well‐being. We analyzed how increasing urban tree canopy cover in city areas of 900 m2 can reduce land surface temperatures, using detailed aerial‐LiDAR and satellite data with Bayesian hierarchical models.
Ángel Ruiz‐Valero, Jaime Francisco Pereña‐Ortiz, Isidro Martín‐Lozano, Álvaro Cortés‐Molino, Pablo Cozano‐Pérez, Begoña Galindo‐Ruiz, Luis Alberto Díaz‐Galiano, Ángel Enrique Salvo‐Tierra   +7 more
wiley   +1 more source

iSensMex-POT, a Potentiostat Platform for Human Health Applications

IEEE Access
This work introduces the iSensMEX-POT platform, a potentiostat-based detection system for conducting cyclic voltammetry measurements. It consists of a mixed-mode application-specific integrated circuit (ASIC) and a user digital interface unit based on ...
Gregorio Zamora-Mejia, Victor H. Carbajal-Gomez, Luis C. Alvarez-Simon, Alejandro Silva-Juarez, Alejandro I. Bautista-Castillo, Sergio A. Rosales-Nunez, Jose M. Rocha-Perez, Francisco Barbosa-Escudero, Margarita Sanchez-Dominguez, Daniel Durini   +9 more
doaj   +1 more source

Cosmic Ray Counting Variability From Water‐Cherenkov Detectors as a Proxy of Stratospheric Conditions in Antarctica

Earth and Space Science, Volume 12, Issue 11, November 2025.
Abstract This work examines atmospheric effects on cosmic ray counts observed by a Water‐Cherenkov detector at the Argentine Antarctic Marambio Station. We analyze the influence of ground‐level barometric pressure and geopotential height at various pressure levels on daily particle rates, finding the strongest association at 100 hPa, linked to ...
N. A. Santos, N. Gómez, S. Dasso, A. M. Gulisano, L. Rubinstein, M. Pereira, O. Areso, for the LAGO Collaboration   +7 more
wiley   +1 more source

Modelo de operación de la biblioteca nacional de ciencia y tecnología del instituto politécnico nacional

Encontros Bibli, 2001
Propuesta para un modelo de operación de la Biblioteca Nacional de Ciencia y Tecnología del Instituto Politécnico Nacional, en la que se hacen algunas consideraciones estratégicas con relación a la creación de servicios bibliotecarios, destinadas a la ...
Noel Ângulo Marcial
doaj   +1 more source

Non‐invasive characterization of melanoma depth at single‐cell resolution

Journal of the European Academy of Dermatology and Venereology, Volume 39, Issue 11, Page 1945-1954, November 2025.
Non‐invasive determination of Breslow depth would be beneficial for the clinical management of melanoma. We demonstrate that RSOM can achieve non‐invasive imaging of single melanocytes up to several millimetres in tissue. A pilot clinical study showed a high degree of correlation between RSOM and the standard for Breslow depth determination.
Juan Aguirre, Christine Gasteiger, Benedikt Hindelang, Markus Seeger, Andrei Bereznhoi, Ina Weidenfeld, Ulf Darsow, Andre C. Stiel, Susanne Annette Steimle‐Grauer, Christian Posch, Tilo Biedermann, Vasilis Ntziachristos   +11 more
wiley   +1 more source

Combinando impresión 3D y electrónica como estrategia para mejorar la experiencia de aprendizaje

RIED: Revista Iberoamericana de Educación a Distancia, 2021
En la actualidad, la impresión 3D se ha convertido en una tecnología que ha creado un nuevo paradigma de comunidades de aprendizaje, constituyendo una cultura o subcultura contemporánea, denominada coloquialmente como “cultura maker”, la cual puede ...
Juan Suardíaz Muro, Mario Pérez Gomáriz, Andrés Cabrera Lozoya, René Ove Do Carmo Trolle   +3 more
doaj   +1 more source

Skeleton‐Based Posture Recognition for Home Care From Virtual Unmanned Aerial Vehicle

Expert Systems, Volume 42, Issue 9, September 2025.
ABSTRACT This article presents a novel approach for real‐time posture recognition in monitoring scenarios, utilising a virtual camera simulated on a UAV within virtual environments. Leveraging the MediaPipe Pose library, key points of the body skeleton are extracted, focusing on a subset of 8 key points for computational efficiency.
Andrés Bustamante, Lidia M. Belmonte, António Pereira, Rafael Morales, Antonio Fernández‐Caballero   +4 more
wiley   +1 more source