Results 31 to 40 of about 16,199 (256)

Stepwise On‐Surface Synthesis and Transformations of Two‐Dimensional Covalent Organic Frameworks by Controlled Thermal Stimuli

Advanced Materials, EarlyView.
The seminal transformation of a 2D‐COF (SURFCOF‐IMDEA1) into a 2D porous COF (SURFCOF‐IMDEA2) on Au(111) by a sequential C‐C coupling and ladderization triggered by thermal annealing steps at increasing temperatures is reported. Abstract The development of covalent organic frameworks (COFs) is currently a primary objective in materials science, taking ...
Ana Barragán, Elena Pérez‐Elvira, Diego J. Vicent, Marco Lozano, Diego Soler‐Polo, Koen Lauwaet, José M. Gallego, Rodolfo Miranda, José I. Urgel, Pavel Jelínek, Nazario Martín, David Écija   +11 more
wiley   +1 more source

Què és la tecnopolítica? Esquema conceptual per a entendre la política en l’era digital

IDP, 2017
En aquest article volem reconsiderar el terme tecnopolítica i veure què significa en la política democràtica dels nostres temps. Comencem indagant l’ús inicial del terme i com aquest s’ha anat transformant per mitjà de les diverses i contradictòries ...
Can Kurban, Ismael Peña-López, Maria Haberer   +2 more
doaj   +2 more sources

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

Advanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano, Fabián Calleja, Ji Dai, Massimo Tallarida, Vera Marinova, Alessandro Barla, Marc G. Cuxart, Pierluigi Gargiani, Gonzalo N. Molina, José Angel Silva‐Guillén, Adriana I. Figueroa, Kevin García‐Díez, Sergio O. Valenzuela, Aitor Mugarza, Amadeo L. Vázquez de Parga, Rodolfo Miranda, Francisco Guinea, Manuela Garnica, Miguel A. Valbuena   +18 more
wiley   +1 more source

Circulación del SARS-CoV-2 en embarazadas del centro de Argentina

Revista de la Facultad de Ciencias Médicas de Córdoba
Introducción: El SARS-CoV-2 puede provocar una infección más grave durante el embarazo. Sin embargo, faltan datos a nivel poblacional sobre COVID-19 y la adopción de vacunas en este grupo de población, especialmente en América del Sur.
Leticia D´Augero, Gonzalo M. Castro, Paola Sicilia, Eugenio Cecchetto, Laura Lopez, Graciela Scruzzi, Paula Barbero, Maria del Pilar Diaz, Maria Gabriela Babas, Viviana Re, Maria Belen Pisano   +10 more
doaj   +1 more source

BRECHA DE IMPLEMENTACIÓN DEL E-GOBIERNO EN EL HOSPITAL REGIONAL DE MOQUEGUA

Revista Médica Basadrina, 2019
INTRODUCCIÓN: El gobierno electrónico es una herramienta de enorme potencial en términos de la Administración Pública. El objetivo fue identificar la brecha de la implementación de e-gobierno en el Hospital Regional de Moquegua. MATERIAL Y MÉTODOS: Investigación de tipo descriptivo, cualitativa, se realizó entre los meses de junio a octubre del año ...
Aspajo Grandez, Irwing, Villegas Flores, Anthony Dickson   +1 more
openaire   +3 more sources

Water Permeates and Plasticizes Amorphous Carbon Dots: Unraveling the Inner Accessibility of the Nanoparticles by Glass Transition Studies

Advanced Materials, EarlyView.
The water permeability of amorphous carbon dots (CDs) is demonstrated by investigating their plasticization. Novel polyamide‐based and amorphous nanoparticles are synthesized by controlling their inner packing density. Water plasticization is evidenced by the decrease of the CDs glass transition temperature with increasing the hydration degree.
Elisa Sturabotti, Valerio Di Lisio, Lucia Cardo, Alessandro Camilli, Estela Moretón Alfonsín, Daniele Cangialosi, Amaia Iturrospe Ibarra, Arantxa Arbe, Maurizio Prato   +8 more
wiley   +1 more source

Análisis de la seguridad en los sistemas de e-Gobierno mediante el problema SAT [PDF]

INGE CUC, 2016
The proposal of this research is to evaluate e-government security systems with current security frameworks and the Boolean satisfiability bases. The proposed model consists of two segments: the construction of five security frameworks based on international standards and the construction of an evaluation model for administrative security.
Monica Baquerizo Anastacio, César Guevara Maldonado   +1 more
openaire   +1 more source

Self‐Cooling Molecular Spin Qudits

Advanced Materials, EarlyView.
A material made of [GdEr] molecular dimers can encode a qudit and perform as a magnetic refrigerant. Microwave resonant pulses coherently manipulate its 16 spin states, while direct demagnetization measurements cool the material and a device down to temperatures below 1 K.
Elías Palacios, David Aguilà, David Gracia, Diamatoula Maniaki, Leoní A. Barrios, Alessandro Chiesa, Jesús I. Martínez, Valentin Novikov, Olivier Roubeau, Stefano Carretta, Marco Evangelisti, Guillem Aromí, Fernando Luis   +12 more
wiley   +1 more source

Las TIC y el e-gobierno en Puerto Rico: innovación, formación y educación

MEDIACIONES, 2006
En este texto, proponemos un acercamiento inicial al caso del gobierno electrónico en Puerto Rico (e-gobierno). Por supuesto, considerando a las Tecnologías de la Información y Comunicación (TIC) como la plataforma para el desarrollo de esta innovadora propuesta de participación ciudadana en la Isla. Son muchos los interrogantes que surgen a la hora de
Abadía-Rexach, Bárbara I, Avilés-Santiago, Manuel G   +1 more
openaire   +3 more sources

A Functional 2D Carbon Allotrope Combining Nanoporous Graphene and Biphenylene Segments

Advanced Materials, EarlyView.
The synthesis of a novel nanoporous graphene (NPG) is reported with biphenylene segments via thermal fusion of 12‐armchair porous graphene nanoribbons grown on gold surfaces. Characterization using STM, AFM, and DFT reveals low‐defect semiconducting behaviour and tunable band gaps.
Paula Angulo‐Portugal, Martin Irizar, Longfeng Huang, Mamun Sarker, Mustafa A. Ashoush, Zakaria M. Abd El‐Fattah, Johannes Barth, Frederik Schiller, Afaf El‐Sayed, Fei Gao, Dimas G. de Oteyza, Alexander Sinitskii, Aran Garcia‐Lekue, Martina Corso, Ignacio Piquero‐Zulaica   +14 more
wiley   +1 more source