451 research outputs found
Deterministic and time resolved thermo-magnetic switching in a nickel nanowire
[EN]Heating a ferromagnetic material is often perceived as detrimental for most applications. This is
indeed the case for modern nano-scaled spintronic devices which are operated solely (at least ideally)
by an electric current. Heat is a by-product of the current-driven operation and it deteriorates many
functionalities of the device. A large scientific and technological effort is devoted these days to
avoid heat in modern magnetic nano devices. Here we show that heat can be used to provide an
additional and useful degree of freedom in the control of the local magnetization at the nanoscale. In
a ferromagnetic nanowire, temperature is used to induce a magnetic switching through a perfectly
deterministic mechanism. The nucleation of the magnetic domain walls that triggers the switching
can be achieved at a field considerably smaller than the nucleation field and, importantly, the exact
moment of the magnetic switching can be pre-determined with nanosecond precision by controlling
the power delivered locally to the switching area. With the help of micromagnetic simulations and a
theoretical model, we provide an accurate explanation of how this deterministic thermo-magnetic
switching operates. The concepts described in this work may lead to an increased functionality in
magnetic nano-devices based on magnetic domain walls.MAT2017-87072-C4-1-P,MAT2017-87072-C4-4-P and MAT2017-87072-C4-3-P from the Spanish government
SA299P18 from the Junta de Castilla y Leon
POCI-01-0145-FEDER-028676 from Portuguese FCT
COMPETE 2020 (FEDER)
Detección de aberraciones cromosómicas que afectan a genes codificantes de proteínas con actividad tirosina-quinasa en tumores sólidos.
Development and tests of a new prototype detector for the XAFS beamline at Elettra Synchrotron in Trieste
The XAFS beamline at Elettra Synchrotron in Trieste combines X-ray absorption
spectroscopy and X-ray diffraction to provide chemically specific structural
information of materials. It operates in the energy range 2.4-27 keV by using a
silicon double reflection Bragg monochromator. The fluorescence measurement is
performed in place of the absorption spectroscopy when the sample transparency
is too low for transmission measurements or the element to study is too diluted
in the sample. We report on the development and on the preliminary tests of a
new prototype detector based on Silicon Drift Detectors technology and the
SIRIO ultra low noise front-end ASIC. The new system will be able to reduce
drastically the time needed to perform fluorescence measurements, while keeping
a short dead time and maintaining an adequate energy resolution to perform
spectroscopy. The custom-made silicon sensor and the electronics are designed
specifically for the beamline requirements.Comment: Proceeding of the 6YRM 12th-14th Oct 2015 - L'Aquila (Italy).
Accepted for publication on Journal of Physics: Conference Serie
Cruise Report RV "Vizconde de Eza" Survey MEGS22 – JUREVA 04/04/2022-26/04/2022
CIESCampañas de Ictioplancton para Evaluación de Stock
Cruise Report RV "Vizconde de Eza" Survey MEGS22 – CAREVA 13/03/2022-03/04/2022
CIESCampañas de Ictioplancton para Evaluación de Stock
Análise da diversidade da vegetação de uma floresta a ser manejada na Amazônia Ocidental.
As florestas de terra firme na Amazônia são as que ocupam a maior parte das áreas florestadas e vêm sofrendo impacto com a exploração madeireira predatória. É crescente a necessidade de sistemas de exploração florestal que sejam sustentáveis ecológica e economicamente. O manejo florestal de impacto reduzido surge como alternativa, pois nesse sistema é possível diminuir consideravelmente os desperdícios e danos à floresta. Para o acompanhamento da resposta da floresta em regime de manejo é essencial o uso de parcelas permanentes, sendo estas instaladas antes da exploração e remedidas periodicamente. O objetivo do presente estudo foi apresentar a diversidade da vegetação de uma floresta de terra firme observada a partir da instalação de parcelas permanentes
Generation, establishment and characterization of a pluripotent stem cell line (CVTTHi001-A) from primary fibroblasts isolated from a patient with activated PI3 kinase delta syndrome (APDS2)
APDS2 is caused by mutations in PIK3R1 gene resulting in constitutive PI3Kδ activation. PI3Kδ is predominantly expressed in leukocytes and plays critical roles in regulating immune responses. Here we first derived fibroblast primary cells from a skin biopsy of a patient carrying a heterozygous single T deletion in intron 11 of the PIK3R1 gene. We next present the derivation of an induced pluripotent stem cell (iPS) line using a non-integrative reprogramming technology. Pluripotent-related hallmarks are further shown, including: iPSCs self-renewal and expression of pluripotent and differentiation markers after in vitro differentiation towards embryonic germ layers, assessed by RT-PCR and immunofluorescence
What did Hughes teach us about repairing surgical defects in the lower eyelid?
La reconstrucción del párpado inferior sigue siendo un reto, especialmente la reparación de defectos que
abarcan más de la mitad de su superficie horizontal. El colgajo de Hughes del párpado superior ipsilateral
es la técnica quirúrgica de elección para los tumores de gran tamaño del párpado inferior. Presentamos el
caso de una paciente con carcinoma basocelular superficial de párpado inferior izquierdo que fue intervenida con extirpación del tumor con margen de seguridad y reparación del defecto primario mediante
este colgajo. Describimos la técnica de Hughes paso a paso, sus potenciales complicaciones, así como los
puntos clave en su ejecución para conseguir unos resultados satisfactorios.Lower eyelid reconstrution remains a challenge, especially the repair of defects that cover more than
a half of its horizontal surface. The Hughes flap of the ipsilateral upper eyelid is the surgical technique of choice for large tumors of the lower eyelid. We present the case of a patient with superficial
basal cell carcinoma of the lower left eyelid who underwent surgery with excision of the tumor with
margin of safety and repair of the primary defect using this flap. We describe the Hughes technique
step by step, its potential complications, as well as the key points in its execution to achieve satisfactory results
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