374472 research outputs found
Sort by
Antena de doble lemniscata coplanar
No full text[EN] The invention relates to an antenna fonned by the coplanar grouping of two lenmiscate antennas of different sizes, such that one of said antennas is located inside the other with a shared power supply point being maintained. This novel antenna design is advantageous in that it provides a larger bandwidth than that of the singe lenmiscate antenna and in that it prevents inclination ofthe radiated beam as occurs with double asymmetric ring antennas. The invention is suitable for use in communication and observation systems that require the radiation characteristics ofthe antenna to be maintained in broad band.[ES] La presente invención es una antena fonnada por el agrupamiento cap lanar de dos antenas lenmiscatas de distinto tamaño, de manera que una ellas esté contenida dentro de la otra, manteniendo en común el punto de alimentación. La ventaja de esta nueva concepción de antena reside en un mayor ancho de banda que el proporcionado por una antena lenmiscata simple, y que evita la inclinación del haz radiado que proporcionan las antenas de doble anillo asimétrico. Es aplicable en sistemas de comunicaciones y de observación que requieren mantener en banda ancha las características en radiación de la antena.Peer reviewedConsejo Superior de Investigaciones Científicas (España), Universidad de CantabriaA1 Solicitud de patente con informe sobre el estado de la técnic
Procedimiento para la propagación in vitro del espárrago
No full textProcedimiento para la propagación in vitro del espárrago.
Procedimiento de propagación de espárrago (del género
Asparagus) mediante técnicas de cultivo de tejidos vegetales.
Se describe un procedimiento de propagación in vitro del
espárrago enfocado hacia el acortamiento del proceso
de micropropagación conforme y hacia la obtención de
un método eficaz y consistente, que nos permita obtener
unos altos porcentajes de éxito en la clonación para una
mayoría de genotipos, y reducir el tiempo necesario para
la obtención de copias clónales de genotipos agronómicamente
interesantes.El procedimiento de propagación in vitro del espárrago
objeto de la presente invención consiste en el cultivo y
desarrollo de estructuras gemantes ya preexistentes en el
rizoma, cultivándose yemas axilares que ofrecen por ello
una mejor garantía de estabilidad somacional, asimismo
las raíces se forman a partir de un tejido de parénquima
que se conserva en la parte basal de la zona gemante del
rizoma que se utiliza como explanto. El procedimiento objeto
de la presente invención, probado en genotipos muy
diferentes incluyendo incluso una especie silvestre de espárrago
A. maritimus, una variedad población (“Morado
de Huétor”) y varios cultivares de Asparagus officinalis
(“UC-157”, “Baitoru”, y “Atlas”) funciona bien en todos los
genotipos evaluados y alcanza además unos rendimientos
de enraizado bastante altos en todos los genotipos
ensayados y en un periodo de tiempo bastante corto, obteniéndose
plántulas de 3-4 semanas y en 6-8 semanas plantas de calidad y características idóneas para su trasplante
y aclimatación, con un elevado rendimiento en la
recuperación de plántulas de calidad al final del proceso
de micropropagación.Peer reviewedConsejo Superior de Investigaciones Científicas (España)A1 Solicitud de patente con informe sobre el estado de la técnic
Method and system for the analysis of analytes through mechanical resonance transduction
No full textThe invention relates to a method and a system of mechanical resonance transduction for analyte analysis, suitable for its use in the identification of nanoparticles in the range between 1 MHz and 300 GHz, said method being characterized in that it comprises the following steps: a) disposing at least one analyte (1), possessing at least one mechanical vibration mode (1'), on at least one mechanical resonator sensor (2) that possesses at least one mechanical vibration mode (2'), selectable in a plurality of working frequencies; b) monitoring the mechanical spectra of the of the analyte (1) and the resonator sensor (2); c) varying the at least one mechanical vibration mode (2') until at least one mechanical vibration mode (2') reaches a strong coupling situation with the at least one mechanical vibration mode (1'); d) collecting the frequency data at which the strong coupling occurs; e) estimating the resonance frequency and quality factor of the at least one mechanical vibration mode (1') from the strong coupling frequency data obtained in step d)Peer reviewedConsejo Superior de Investigaciones Científicas (España)A1 Solicitud de patente con informe sobre el estado de la técnic
Bobina magnética con configuración geométrica incompleta
No full textEl objeto principal de la presente invención se enmarca dentro del campo del diseño de bobinas magnéticas. En particular está dirigida a mejorar el diseño de bobinas magnéticas para poder alcanzar campos magnéticos elevados y muy rápidos . La presente invención mejora el diseño de uno de los componentes principales, sistema de bobinas de gradiente, de los equipos de imagen basados en la técnica de la resonancia magnética (RM).
En esta invención se presenta una bobina magnética con configuración geométrica incompleta. La bobina magnética está caracterizada porque al menos uno
de sus lóbulos está incompleto. El método de fabricación está basado en rellenado combinatorio. Además, la bobina magnética que se presenta en esta invención puede alcanzar gradientes magnéticos intensos y rápidosPeer reviewedTesoro Imaging, S.L., Consejo Superior de Investigaciones Científicas (España)A1 Solicitud de patente con informe sobre el estado de la técnic
Levaduras vínicas recombinantes
No full textLevaduras vínicas recombinantes.
Método de obtención de cepas que secretan una mayor
concentración de manoproteínas al medio, cepa de la levadura
Saccharomyces cerevisiae depositada en la Colección
Española de Cultivos Tipo (CECT), con el número
CECT 13012, y usos de dichas cepas.Peer reviewedConsejo Superior de Investigaciones Científicas (España)B1 Patente con informe sobre el estado de la ténic
Acquisition device to limit leakage current in electrophysiological signal recording devices
No full textLa invención se refiere a un dispositivo de adquisición que limita la corriente de fuga en un sistema electrónico de registro de señales electrofisiológicas en el que el elemento transductor es un dispositivo activo.Peer reviewedConsejo Superior de Investigaciones Científicas (España), Centro de Investigación Biomédica en Red (España), Icrea; CSIC-ICN Centro de Investigación en Nanociencia y Nanotecnología (CIN2)T3 Traducción de patente europe
Personal Data Flows and Privacy Policy Traceability in Third-party LLM Apps in the GPT Ecosystem
No full textThe rapid growth of platforms for customizing Large Language
Models (LLMs), such as OpenAI’s GPTs, has raised new privacy
and security concerns, particularly related to the exposure of user
data via third-party API integrations in LLM apps.To assess privacy
risks and data practices, we conducted a large-scale analysis of
OpenAI’s GPTs ecosystem. Through the analysis of 5,286 GPTs
and the 44,102 parameters they use through API calls to exter nal services, we systematically investigated the types of user data
collected, as well as the completeness and discrepancies between
actual data flows and GPTs stated privacy policies. Our results high light that approximately 35% of API parameters enable the sharing
of sensitive or personally identifiable information, yet only 15%
of corresponding privacy policies provide complete disclosure. By
quantifying these discrepancies, our study exposes critical privacy
risks and underscores the need for stronger oversight and support
tools in LLM-based application development. Furthermore, we un cover widespread problematic practices among GPT creators, such
as missing or inaccurate privacy policies and a misunderstanding
of their privacy responsibilities. Building on these insights, we
propose design recommendations that include actionable measure ments to improve transparency and informed consent, enhance
creator responsibility, and strengthen regulation.This research was partially funded by the INCIBE’s strategic SPRINT (Seguridad y Privacidad en Sistemas con Inteligencia Artificial) C063/23 project with funds from the EU-NextGenerationEU through
the Spanish government’s Plan de Recuperación, Transformación
y Resiliencia; by the Spanish Government via project PID2023-
151536OB-I0; and by the Generalitat Valenciana via project PROMETEO
CIPROM/2023/23.Peer reviewe
Arctic seabirds exposed to acute stress display state- and environment-dependent patterns of surface temperature change, which are not modified by mercury contamination
No full textAnimals mount a suite of physiological reactions when confronted with acute stressors, including changes in body temperature (Tb). Such thermal stress responses (TSRs) are important to survival, but may also generate heat stress, making regulation critical. Poor body condition and exposure to chemical contaminants, such as mercury (Hg), a neurotoxin and endocrine disruptor, may have physiological effects that disrupt modulation of TSRs. Implications of such effects could be magnified by climate change. We used infrared thermography (IRT) imagery to measure stress-induced changes in body surface temperature (maximum temperature of the eye region; TEYE) of an Arctic seabird, the little auk (Alle alle). We evaluated how changes were correlated with Hg contamination, body condition, blood chemistry parameters and ambient temperature (Ta). As Arctic animals, little auks are cold-adapted and face warming rates nearly four times the global average, making them vulnerable to heat stress. Little auks displayed a robust TSR with TEYE at sample point 1–3 (mean ± SD) of 28.9 ± 6.86 °C, 33.7 ± 5.48 °C, and 35.4 ± 5.76 °C, respectively. Mercury load was unrelated to changes in TEYE. However, TEYE was elevated at higher Ta (β ± SE =3.214 ± 0.733) across sampling time points, suggesting upregulation of heat dissipation. Furthermore, little auks in poor condition displayed lower magnitude changes in TEYE (β ± SE = 0.688 ± 0.232), and several blood chemistry parameters were correlated to changes in TEYE. Results suggest that thermoregulatory dynamics in the face of acute stress depend on environmental and physiological state.The authors thank Maud Brault-Favrou of the platform Analyses Elémentaires of LIENSs laboratory for assistance with Hg analyses, and David Pinaud from CEBC-CNRS for lending us the thermal camera. ASG, MLG, and MCF were supported by the European Union's Horizon 2020 programme (Marie Skłodowska-Curie IFs 101025549, 896866, 101024166). We acknowledge long-term support from the French Polar Institute (IPEV) to the ADACLIM program (388) administered by JF and DG, and support of CNRS Ecology Environment within the suivis à long-terme du vivant (SLVT). The authors thank Maud Brault-Favrou of the platform Analyses Elémentaires of LIENSs laboratory for assistance with Hg analyses, and David Pinaud from CEBC-CNRS for lending us the thermal camera. This work contributes to the research projects ARCTIC-STRESSORS and ILETOP funded by the French National Research Agency (ANR-20-CE34-0006, ANR-16-CE34-0005) and the international ARCTOX initiative (https://arctox.cnrs.fr). We also thank the CPER (Contrat de Projet Etat-Région) and the FEDER (Fonds Européen de Développement Régional) for funding the AMA of LIENSs laboratory.Peer reviewe
Bigel formation through surfactant-free co-gelation-in-emulsion without thermal activation of the hydrogel: Expanding the toolbox for customizable, and food-grade fat replacers
No full textReplacing saturated and trans fats with healthier alternatives remains a major challenge for the food industry. This study presents a simple method to fabricate food-grade bigels with improved structural and functional properties. A surfactant-free co-gelation-in-emulsion approach was applied, in which basic pullulan, sodium trimetaphosphate (STMP) solutions were emulsified with molten candelilla wax/extra virgin olive oil solutions under mild agitation. Hydro- and oleo-gelation ocurred simultaneously once emulsion was prepared, withput thermal activation of the hidrogel, directly forming the bigel. Bigels with hydrogel-to-oleogel ratios of 25:75, 50:50, and 75:25 were produced and compared with systems obtained by conventional high-shear mixing of the separately prepared hydro- and oleo-gels. Co-gelated bigels exhibited homogeneous phase distribution, solid-like rheology, and high oil-binding capacity (>80 % at 25 % hydrogel; no oil leakage at ≥50 %). When the hydrogel acted as the continuous phase (≥50 %), the systems displayed marked increases in elasticity (G′ > 6000 Pa), hardness (≈450–500 g), and swelling (up to 55 %), closely resembling pure hydrogels. In contrast, mixed bigels prepared by high shear mixing of single gels presented fragmented, heterogeneous structures with lower stability and weaker texture. FT-IR, WAXS, and confocal microscopy confirmed improved hydrogen bonding, maintenance of oleogel crystallinity, and more continuous networks in co-gelated samples. This thermally independent route of the hydriphilic domain enables the use of biopolymers with slow chemical cross-linking kinetics (such as pullulan-STMP) and yields bigels that are more homogeneous, mechanically stronger, and oil-retentive. Overall, the method broadens the possibilities of food-grade bigels as customizable fat replacers.The authors want to thank the SAXS-WAXS service at The Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), in which SAXS measurements were performed, and authors acknowledge the program “500 scientists” of the Ministry of Science and Higher Education of the Republic of Kazakhstan, “Center for International Programmes” and the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan for financial support IRN: BR 24993113 “Developing composites based on amphiphilic water-soluble polymers for multifunctional applications”.Peer reviewe
Influence of Ar-assisted pulsed laser ablation on structural and magnetic properties of Fe₈0B20 thin films
No full textWe report on the chemical, structural and morphological modifications introduced in nanothick Fe80B20 films by the use of Ar assistance (at different pressures) during their pulsed laser ablation deposition process. As a reference, a film deposited in absence of Ar and under ultra-high vacuum conditions was also prepared. Samples were characterized from the measurement of X-ray photoelectron spectroscopy depth profiles, atomic force microscopy, and transmission electron microscopy as well as from the standpoint of their dc angular dependence of the hysteresis, high applied field magnetization and tens of GHz dynamics. Our results include i) the induction of surface roughening that increases with the assisting gas pressure, ii) the amorphousness of the ultra-high vacuum film, iii) the induction, by the Ar assistance, of partial crystallization, yielding Fe-rich columns whose transverse dimension increased with the Ar pressure, iv) the progressive isotropization of the in-plane hysteresis parameters associated to the increase of Ar pressure, v) the occurrence on the samples deposited with the largest Ar pressures of spin waves stiffness constant having a magnitude 20 times larger than the value measured in the reference sample, and vi) the decrease of the ferromagnetic resonance damping parameter with regard to the reference sample.Peer reviewe