5,896 results on '"Santiago J"'
Search Results
202. Alexander Vovin. [2005 y 2009] 2020. A Descriptive and Comparative Grammar of Western Old Japanese. Revised, Updated and Enlarged 2nd Edition
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Ciprian, Santiago J. Martin
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- 2022
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203. Sport fishing and vessel pressure on the endangered cetacean Delphinus delphis. Towards an international agreement of micro-sanctuary for its conservation
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Olaya-Ponzone, L., Espada Ruíz, R., Patón Domínguez, D., Martín Moreno, E., Cárdenas Marcial, I., Serradilla Santiago, J., and García-Gómez, J.C.
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- 2023
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204. Indoor-outdoor pollutant concentration modelling: a comprehensive urban air quality and exposure assessment
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Santiago, J. L., Rivas, E., Buccolieri, R., Martilli, A., Vivanco, M. G., Borge, R., Carlo, O. S., and Martín, F.
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- 2022
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205. An adaptation-mitigation game: does adaptation promote participation in international environmental agreements?
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Borrero, Miguel and Rubio, Santiago J.
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- 2022
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206. Anthropometric measures and breast cancer risk among Hispanic women in Puerto Rico
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Ramírez-Marrero, F. A., Nazario, C. M., Rosario-Rosado, R. V., Schelske-Santos, M., Mansilla-Rivera, I., Nie, J., Hernández-Santiago, J., and Freudenheim, J. L.
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- 2022
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207. Tres definiciones negativas de la enciclopedística de Novalis /Three negative definitions of Novalis' Encyclopaedistics
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Napoli, Santiago J. and Nietzsche, Friedrich
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- 2022
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208. Aragonese: The Aragonese Language in Education in Spain. Regional Dossiers Series
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Fryske Akademy (Netherlands), Mercator European Research Centre on Multilingualism and Language Learning, Cortés, Juan Pablo Martínez, and Martín, Santiago J. Paricio
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This regional dossier aims to provide a concise description of the European minority language, Aragonese, in education. Aspects that are addressed include features of the education system, recent educational policies, main actors, legal arrangements and support structures, as well as quantitative aspects such as the number of schools, teachers, pupils, and financial investments. This kind of information can serve several purposes and can be relevant for policymakers, researchers, teachers, students, and journalists as the information provided serves as a first orientation towards further research, or function as a source of ideas for improving educational provisions in their own region. This dossier contains a glossary, foreword, and an introduction to the region under study, and six sections dealing with a specific level of the education system. Sections eight to ten cover research, prospects, and summary statistics. A list of references and further reading is included.
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- 2017
209. Design of Wearable Textile Electrodes for the Monitorization of Patients with Heart Failure
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Sánchez, María Jesús, primary, Scagliusi, Santiago J. Fernández, additional, Giménez-Miranda, Luis, additional, Pérez, Pablo, additional, Medrano, Francisco Javier, additional, and Olmo Fernández, Alberto, additional
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- 2024
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210. Factors associated with referrals for directly observed treatment and unsuccessful treatment
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Diaz, Y.D. González, primary, Palma, D., additional, Vargas-Leguás, H., additional, Rodrigo, T., additional, Molina-Pinargorte, I., additional, Casas, X., additional, Forcada, N., additional, Santiago, J., additional, Altet, N., additional, and Millet, J-P., additional
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- 2024
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211. Molecular docking analysis of chlorpyrifos at the human α7-nAChR and its potential relationship with neurocytoxicity in SH-SY5Y cells
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Ramirez-Cando, Lenin J., primary, Rodríguez-Cazar, Lizeth G., additional, Acosta-Tobar, Luis A., additional, and Ballaz, Santiago J., additional
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- 2024
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212. Poor agreement between biopsies and Endoscopic Submucosal Dissection (ESD) specimens on upper GI lesions: results from the Spanish registry
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Fernández-Esparrach, M. G., additional, De Tejada, A. Herreros, additional, Marín-Gabriel, J. C., additional, Albéniz, E., additional, Santiago, J., additional, Rincón, O. Nogales, additional, Rosón, P., additional, Goikoetxea, U., additional, Miranda, P., additional, De Santiago, E. Rodriguez, additional, Uchima, H., additional, Sánchez, J. Rodríguez, additional, Peñas, B., additional, Del Pozo, A., additional, Parejo, S., additional, Terán, Á., additional, de Frutos, D., additional, Daniel, P., additional, Pallares, P. De Maria, additional, Díaz-Tasende, J., additional, Mangas-Sanjuan, C., additional, Alvarez, A., additional, Fraile-Lopez, M., additional, Guarner-Argente, C., additional, Amoros Tenorio, A., additional, Rivero-Sánchez, L., additional, and Ortiz, O., additional
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- 2024
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213. Proton acceleration in thermonuclear nova explosions revealed by gamma rays
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Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Artero, M., Asano, K., Baack, D., Babić, A., Baquero, A., Barres de Almeida, U., Barrio, J. A., Batković, I., Becerra González, J., Bednarek, W., Bellizzi, L., Bernardini, E., Bernardos, M., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bökenkamp, H., Bonnoli, G., Bošnjak, Ž., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D’Amico, G., D’Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Del Popolo, A., Delfino, M., Delgado, J., Delgado Mendez, C., Depaoli, D., Di Pierro, F., Di Venere, L., Do Souto Espiñeira, E., Prester, D. Dominis, Donini, A., Dorner, D., Doro, M., Elsaesser, D., Fallah Ramazani, V., Fariña Alonso, L., Fattorini, A., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., Fukazawa, Y., García López, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinović, N., Green, J. G., Green, D., Hadasch, D., Hahn, A., Hassan, T., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., Hütten, M., Inada, T., Ishio, K., Iwamura, Y., Jiménez Martínez, I., Jormanainen, J., Jouvin, L., Kerszberg, D., Kobayashi, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Linhoff, L., Lombardi, S., Longo, F., López-Coto, R., López-Moya, M., López-Oramas, A., Loporchio, S., Machado de Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mas Aguilar, A., Mazin, D., Menchiari, S., Mender, S., Mićanović, S., Miceli, D., Miener, T., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Nakamori, T., Nava, L., Neustroev, V., Nievas Rosillo, M., Nigro, C., Nilsson, K., Nishijima, K., Noda, K., Nozaki, S., Ohtani, Y., Oka, T., Otero-Santos, J., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Pavletić, L., Peñil, P., Persic, M., Pihet, M., Prada Moroni, P. G., Prandini, E., Priyadarshi, C., Puljak, I., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Saturni, F. G., Schleicher, B., Schmidt, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Spolon, A., Stamerra, A., Strišković, J., Strom, D., Strzys, M., Suda, Y., Surić, T., Takahashi, M., Takeishi, R., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Tosti, L., Truzzi, S., Tutone, A., Ubach, S., van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Ventura, S., Verguilov, V., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Wunderlich, C., Yamamoto, T., Zarić, D., Ambrosino, F., Cecconi, M., Catanzaro, G., Ferrara, C., Frasca, A., Munari, M., Giustolisi, L., Alonso-Santiago, J., Giarrusso, M., Munari, U., and Valisa, P.
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- 2022
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214. Induced stresses in quasi-spherical elastic vesicles: local and global Laplace-Young law
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Torres-Vargas, G., Santiago, J. A., and Chacón-Acosta, G.
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Condensed Matter - Soft Condensed Matter - Abstract
On elastic spherical membranes, there is no stress induced by the bending energy and the corresponding Laplace-Young law does not involve the elastic bending stiffness. However, when considering an axially symmetrical perturbation that pinches the sphere, it induces nontrivial stresses on the entire membrane. In this paper we introduce a theoretical framework to examine the stress induced by perturbations of geometry around the sphere. We find the local balance force equations along the normal direction to the vesicle, and along the unit binormal, tangent to the membrane; likewise, the global balance force equation on closed loops is also examined. We analyze the distribution of stresses on the membrane as the budding transition occurs. For closed membranes we obtain the modified Young-Laplace law that appears as a consequence of this perturbation., Comment: 10 latex pages. Comments are welcome
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- 2018
215. Effects of chemical disorder in the itinerant antiferromagnet Ti$_{1-x}$V$_x$Au
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Huang, C. -L., Santiago, J. M., Svanidze, E., Besara, T., Siegrist, T., and Morosan, E.
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Condensed Matter - Strongly Correlated Electrons - Abstract
The fragile nature of itinerant magnetism can be exploited using non-thermal parameters to study quantum criticality. The recently discovered quantum critical point (QCP) in the Sc-doped (hole-like doping) itinerant antiferromagnet TiAu (Ti$_{1-x}$Sc$_{x}$Au) raised questions about the effects of the crystal and electronic structures on the overall magnetic behavior. In this study, doping with V (electron-like doping) in Ti$_{1-x}$V$_{x}$Au introduces chemical disorder which suppresses antiferromagnetic order from $T_{\rm N} =$ 36~K for $x = 0$ down to 10 K for $x =$ 0.15, whereupon a solubility limit is reached. Signatures of non-Fermi-liquid behavior are observed in transport and specific heat measurements similar to Ti$_{1-x}$Sc$_{x}$Au, even though Ti$_{1-x}$V$_{x}$Au is far from a QCP for the accessible compositions $x \leq 0.15$.
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- 2018
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216. NGC 3105: a young open cluster with low metallicity
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Alonso-Santiago, J., Marco, A., Negueruela, I., Tabernero, H. M., Castro, N., McBride, V. A., and Rajoelimanana, A. F.
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Astrophysics - Astrophysics of Galaxies - Abstract
NGC 3105 is a young open cluster hosting blue, yellow and red supergiants. This rare combination makes it an excellent laboratory to constrain evolutionary models of high-mass stars. It is poorly studied and fundamental parameters such as its age or distance are not well defined. We intend to characterize in an accurate way the cluster as well as its evolved stars, for which we derive for the first time atmospheric parameters and chemical abundances. We identify 126 B-type likely members within a radius of 2.7$\pm$0.6 arcmin, which implies an initial mass, $M_{cl}\approx$4100 M$_{\odot}$. We find a distance of 7.2$\pm$0.7 kpc for NGC 3105, placing it at $R_{GC}$=10.0$\pm$1.2 kpc. Isochrone fitting supports an age of 28$\pm$6 Ma, implying masses around 9.5 M$_{\odot}$ for the supergiants. A high fraction of Be stars ($\approx$25 %) is found at the top of the main sequence down to spectral type b3. From the spectral analysis we estimate for the cluster a $v_{rad}$=+46.9$\pm$0.9 km s$^{-1}$ and a low metallicity, [Fe/H]=-0.29$\pm$0.22. We also have determined, for the first time, chemical abundances for Li, O, Na, Mg, Si, Ca, Ti, Ni, Rb, Y, and Ba for the evolved stars. The chemical composition of the cluster is consistent with that of the Galactic thin disc. An overabundance of Ba is found, supporting the enhanced $s$-process. NGC 3105 has a low metallicity for its Galactocentric distance, comparable to typical LMC stars. It is a valuable spiral tracer in a very distant region of the Carina-Sagittarius spiral arm, a poorly known part of the Galaxy. As one of the few Galactic clusters containing blue, yellow and red supergiants, it is massive enough to serve as a testbed for theoretical evolutionary models close to the boundary between intermediate and high-mass stars., Comment: 18 pages, 13 figures. Accepted for publication in A&A
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- 2018
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217. The Gaia-ESO Survey: kinematical and dynamical study of four young open clusters
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Bravi, L., Zari, E., Sacco, G. G., Randich, S., Jeffries, R. D., Jackson, R. J., Franciosini, E., Moraux, E., López-Santiago, J., Pancino, E., Spina, L., Wright, N., Jiménez-Esteban, F. M., Klutsch, A., Roccatagliata, V., Gilmore, G., Bragaglia, A., Flaccomio, E., Francois, P., Koposov, S. E., Bayo, A., Carraro, G., Costado, M. T., Damiani, F., Frasca, A., Hourihane, A., Jofré, P., Lardo, C., Lewis, J., Magrini, L., Morbidelli, L., Prisinzano, L., Sousa, S. G., Worley, C. C., and Zaggia, S.
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Astrophysics - Solar and Stellar Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
Context. The origin and dynamical evolution of star clusters is an important topic in stellar astrophysics. Several models have been proposed to understand the formation of bound and unbound clusters and their evolution, and these can be tested by examining the kinematical and dynamical properties of clusters over a wide range of ages and masses. Aims. We use the Gaia-ESO Survey products to study four open clusters (IC 2602, IC 2391, IC 4665, and NGC 2547) that lie in the age range between 20 and 50 Myr. Methods. We employ the gravity index $\gamma$ and the equivalent width of the lithium line at 6708 $\AA$, together with effective temperature $\rm{T_{eff}}$, and the metallicity of the stars in order to discard observed contaminant stars. Then, we derive the cluster radial velocity dispersions $\sigma_c$, the total cluster mass $\rm{M}_{tot}$, and the half mass radius $r_{hm}$. Using the $Gaia$-DR1 TGAS catalogue, we independently derive the intrinsic velocity dispersion of the clusters from the astrometric parameters of cluster members. Results. The intrinsic radial velocity dispersions derived by the spectroscopic data are larger than those derived from the TGAS data, possibly due to the different masses of the considered stars. Using $\rm{M}_{tot}$ and $r_{hm}$ we derive the virial velocity dispersion $\sigma_{vir}$ and we find that three out of four clusters are supervirial. This result is in agreement with the hypothesis that these clusters are dispersing, as predicted by the "residual gas expulsion" scenario. However, recent simulations show that the virial ratio of young star clusters may be overestimated if it is determined using the global velocity dispersion, since the clusters are not fully relaxed., Comment: 14 pages, 6 figures
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- 2018
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218. Graphene mechanical pixels for Interferometric MOdulator Displays (GIMOD)
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Cartamil-Bueno, Santiago J., Davidovikj, Dejan, Centeno, Alba, Zurutuza, Amaia, van der Zant, Herre S. J., Steeneken, Peter G., and Houri, Samer
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Physics - Applied Physics - Abstract
Graphene, the carbon monolayer and 2D allotrope of graphite, has the potential to impact technology with a wide range of applications such as optical modulators for high-speed communications. In contrast to modulation devices that rely on plasmonic or electronic effects, MEMS-based modulators can have wider tuning ranges albeit at a lower operating frequency. These properties make electro-optic mechanical modulators ideal for reflective-type display technologies as has been demonstrated previously with SiN membranes in Interferometric MOdulator Displays (IMODs). Despite their low-power consumption and performance in bright environments, IMODs suffer from low frame rates and limited color gamut. Double-layer graphene (DLG) membranes grown by chemical vapor deposition (CVD) can also recreate the interference effect like in IMODs as proven with drumheads displaying Newton's rings. Here, we report on the electro-optical response of CVD DLG mechanical pixels by measuring the change in wavelength-dependent reflectance of a suspended graphene drumhead as a function of electrical gating. We use a spectrometer to measure the wavelength spectrum at different voltages, and find a good agreement with a model based on light interference. Moreover, to verify that gas compression effects do not play an important role, we use a stroboscopic illumination technique to study the electro-optic response of these graphene pixels at frequencies up to 400 Hz. Based on these findings, we demonstrate a continuous full-spectrum reflective-type pixel technology with a Graphene Interferometric MOdulator Display (GIMOD) prototype of 2500 pixels per inch (ppi) equivalent to more than 12K resolution., Comment: 13 pages, 4 figures
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- 2018
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219. Stresses in curved nematic membranes
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Santiago, J. A.
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Condensed Matter - Soft Condensed Matter - Abstract
Ordering configurations of a director field on a curved membrane induce stress. In this work, we present a theoretical framework to calculate the stress tensor and the torque as a consequence of the nematic ordering; we use the variational principle and invariance of the energy under Euclidean motions. Euler-Lagrange equations of the membrane as well as the corresponding boundary conditions also appear as natural results. The stress tensor found includes attraction-repulsion forces between defects; likewise, defects are attracted to patches with the same sign in gaussian curvature. These forces are mediated by the Green function of Laplace-Beltrami operator of the surface. In addition, we find non-isotropic forces that involve derivatives of the Green function and the gaussian curvature, even in the normal direction to the membrane. We examine the case of axial membranes to analyze the spherical one. For spherical vesicles we find the modified Young-Laplace law as a consequence of the nematic texture. In the case of spherical cap with defect at the north pole, we find that the force is repulsive respect to the north pole, indicating that it is an unstable equilibrium point., Comment: To appear in PRE
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- 2018
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220. Interpreting top-quark LHC measurements in the standard-model effective field theory
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Saavedra, J. A. Aguilar, Degrande, C., Durieux, G., Maltoni, F., Vryonidou, E., Zhang, C., Barducci, D., Brivio, I., Cirigliano, V., Dekens, W., de Vries, J., Englert, C., Fabbrichesi, M., Grojean, C., Haisch, U., Jiang, Y., Kamenik, J., Mangano, M., Marzocca, D., Mereghetti, E., Mimasu, K., Moore, L., Perez, G., Plehn, T., Riva, F., Russell, M., Santiago, J., Schulze, M., Soreq, Y., Tonero, A., Trott, M., Westhoff, S., White, C., Wulzer, A., and Zupan, J.
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High Energy Physics - Phenomenology ,High Energy Physics - Experiment - Abstract
This note proposes common standards and prescriptions for the effective-field-theory interpretation of top-quark measurements at the LHC., Comment: LHC TOP WG note, 10 pages of main text, 5 appendices, 1 figure, 21 tables
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- 2018
221. An Automation System Equivalent to the Douglas Bag Technique Enables Continuous and Repeat Metabolic Measurements in Patients Undergoing Mechanical Ventilation
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Shinozaki, Koichiro, Yu, Pey-Jen, Zhou, Qiuping, Cassiere, Hugh A., Stanley, John, Rolston, Daniel M., Garg, Nidhi, Li, Timmy, Johnson, Jennifer, Saeki, Kota, Goto, Taiki, Okuma, Yu, Miyara, Santiago J., Hayashida, Kei, Aoki, Tomoaki, Wong, Vanessa, Molmenti, Ernesto P., Lampe, Joshua W., and Becker, Lance B.
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- 2022
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222. The CARMENES search for exoplanets around M dwarfs - HD 147379b: A nearby Neptune in the temperate zone of an early-M dwarf
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Reiners, A., Ribas, I., Zechmeister, M., Caballero, J. A., Trifonov, T., Dreizler, S., Morales, J. C., Tal-Or, L., Lafarga, M., Quirrenbach, A., Amado, P. J., Kaminski, A., Jeffers, S. V., Aceituno, J., Béjar, V. J. S., Guàrdia, J., Guenther, E. W., Hagen, H. -J., Montes, D., Passegger, V. M., Seifert, W., Schweitzer, A., Cortés-Contreras, M., Abril, M., Alonso-Floriano, F. J., Eiff, M. Ammler-von, Antona, R., Anglada-Escudé, G., Anwand-Heerwart, H., Arroyo-Torres, B., Azzaro, M., Baroch, D., Barrado, D., Bauer, F. F., Becerril, S., Benítez, D., Berdiñas, Z. M., Bergond, G., Blümcke, M., Brinkmöller, M., del Burgo, C., Cano, J., Vázquez, M. C. Cárdenas, Casal, E., Cifuentes, C., Claret, A., Colomé, J., Czesla, S., Díez-Alonso, E., Feiz, C., Fernández, M., Ferro, I. M., Fuhrmeister, B., Galadí-Enríquez, D., Garcia-Piquer, A., Vargas, M. L. García, Gesa, L., Galera, V. Gómez, Hernández, J. I. González, González-Peinado, R., Grözinger, U., Grohnert, S., Guijarro, A., de Guindos, E., Gutiérrez-Soto, J., Hatzes, A. P., Hauschildt, P. H., Hedrosa, R. P., Helmling, J., Henning, Th., Hermelo, I., Arabí, R. Hernández, Castaño, L. Hernández, Hernando, F. Hernández, Herrero, E., Huber, A., Huke, P., Johnson, E. N., de Juan, E., Kim, M., Klein, R., Klüter, J., Klutsch, A., Kürster, M., Labarga, F., Lamert, A., Lampón, M., Lara, L. M., Laun, W., Lemke, U., Lenzen, R., Launhardt, R., del Fresno, M. López, López-González, M. J., López-Puertas, M., Salas, J. F. López, López-Santiago, J., Luque, R., Madinabeitia, H. Magán, Mall, U., Mancini, L., Mandel, H., Marfil, E., Molina, J. A. Marín, Fernández, D. Maroto, Martín, E. L., Martín-Ruiz, S., Marvin, C. J., Mathar, R. J., Mirabet, E., Moreno-Raya, M. E., Moya, A., Mundt, R., Nagel, E., Naranjo, V., Nortmann, L., Nowak, G., Ofir, A., Oreiro, R., Pallé, E., Panduro, J., Pascual, J., Pavlov, A., Pedraz, S., Pérez-Calpena, A., Medialdea, D. Pérez, Perger, M., Perryman, M. A. C., Pluto, M., Rabaza, O., Ramón, A., Rebolo, R., Redondo, P., Reffert, S., Reinhart, S., Rhode, P., Rix, H. -W., Rodler, F., Rodríguez, E., Rodríguez-López, C., Trinidad, A. Rodríguez, Rohloff, R. -R., Rosich, A., Sadegi, S., Sánchez-Blanco, E., Carrasco, M. A. Sánchez, Sánchez-López, A., Sanz-Forcada, J., Sarkis, P., Sarmiento, L. F., Schäfer, S., Schmitt, J. H. M. M., Schiller, J., Schöfer, P., Solano, E., Stahl, O., Strachan, J. B. P., Stürmer, J., Suárez, J. C., Tabernero, H. M., Tala, M., Tulloch, S. M., Ulbrich, R. -G., Veredas, G., Linares, J. I. Vico, Vilardell, F., Wagner, K., Winkler, J., Wolthoff, V., Xu, W., Yan, F., and Osorio, M. R. Zapatero
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Astrophysics - Earth and Planetary Astrophysics ,Astrophysics - Solar and Stellar Astrophysics - Abstract
We report on the first star discovered to host a planet detected by radial velocity (RV) observations obtained within the CARMENES survey for exoplanets around M dwarfs. HD 147379 ($V = 8.9$ mag, $M = 0.58 \pm 0.08$ M$_{\odot}$), a bright M0.0V star at a distance of 10.7 pc, is found to undergo periodic RV variations with a semi-amplitude of $K = 5.1\pm0.4$ m s$^{-1}$ and a period of $P = 86.54\pm0.06$ d. The RV signal is found in our CARMENES data, which were taken between 2016 and 2017, and is supported by HIRES/Keck observations that were obtained since 2000. The RV variations are interpreted as resulting from a planet of minimum mass $m_{\rm p}\sin{i} = 25 \pm 2$ M$_{\oplus}$, 1.5 times the mass of Neptune, with an orbital semi-major axis $a = 0.32$ au and low eccentricity ($e < 0.13$). HD 147379b is orbiting inside the temperate zone around the star, where water could exist in liquid form. The RV time-series and various spectroscopic indicators show additional hints of variations at an approximate period of 21.1d (and its first harmonic), which we attribute to the rotation period of the star., Comment: accepted for publication as A&A Letter
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- 2017
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223. Tuning the Interfacial Charge, Orbital and Spin Polarization Properties in La0.67Sr0.33MnO3/ La1-xSrxMnO3 Bilayers
- Author
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Carreira, Santiago J., Aguirre, Myriam H., Briatico, Javier, Weschke, Eugen, and Steren, Laura B.
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Condensed Matter - Materials Science - Abstract
The possibility of controlling the interfacial properties of artificial oxide heterostructures is still attracting researchers in the field of materials engineering. Here, we used surface sensitive techniques and high-resolution transmission electron microscopy to investigate the evolution of the surface spin-polarization and lattice strains across the interfaces between La0.66Sr0.33MnO3 thin films and low-doped manganites as capping layers. We have been able to finely tune the interfacial spin-polarization by changing the capping layer thickness and composition. The spin-polarization was found to be highest at a critical capping thickness that depends on the Sr doping. We explain the non-trivial magnetic profile by the combined effect of two mechanisms. On one hand, the extra carriers supplied by the low-doped manganites that tend to compensate the overdoped interface, favouring locally a ferromagnetic double-exchange coupling. On the other hand, the evolution from a tensile-strained structure of the inner layers to a compressed structure at the surface that changes gradually the orbital occupation and hybridization of the 3d-Mn orbitals, being detrimental for the spin polarization. The finding of an intrinsic spin-polarization at the A-site cation observed in XMCD measurements reveals also the existence of a complex magnetic configuration at the interface, different from the magnetic phases observed at the inner layers., Comment: 17 pages and 3 figures
- Published
- 2017
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224. Effective description of general extensions of the Standard Model: the complete tree-level dictionary
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de Blas, J., Criado, J. C., Perez-Victoria, M., and Santiago, J.
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High Energy Physics - Phenomenology ,High Energy Physics - Theory - Abstract
We compute all the tree-level contributions to the Wilson coefficients of the dimension-six Standard-Model effective theory in ultraviolet completions with general scalar, spinor and vector field content and arbitrary interactions. No assumption about the renormalizability of the high-energy theory is made. This provides a complete ultraviolet/infrared dictionary at the classical level, which can be used to study the low-energy implications of any model of interest, and also to look for explicit completions consistent with low-energy data., Comment: Latex, 23 pages + appendices + references, 1 figure, 9 tables. Extended discussion on the use of the results presented in appendix D. New references and comments. Minor corrections. Published version
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- 2017
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225. The CARMENES search for exoplanets around M dwarfs: High-resolution optical and near-infrared spectroscopy of 324 survey stars
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Reiners, A., Zechmeister, M., Caballero, J. A., Ribas, I., Morales, J. C., Jeffers, S. V., Schöfer, P., Tal-Or, L., Quirrenbach, A., Amado, P. J., Kaminski, A., Seifert, W., Abril, M., Aceituno, J., Alonso-Floriano, F. J., Eiff, M. Ammler-von, Antona, R., Anglada-Escudé, G., Anwand-Heerwart, H., Arroyo-Torres, B., Azzaro, M., Baroch, D., Barrado, D., Bauer, F. F., Becerril, S., Béjar, V. J. S., Benítez, D., Berdiñas, Z. M., Bergond, G., Blümcke, M., Brinkmöller, M., del Burgo, C., Cano, J., Vázquez, M. C. Cárdenas, Casal, E., Cifuentes, C., Claret, A., Colomé, J., Cortés-Contreras, M., Czesla, S., Díez-Alonso, E., Dreizler, S., Feiz, C., Fernández, M., Ferro, I. M., Fuhrmeister, B., Galadí-Enríquez, D., Garcia-Piquer, A., Vargas, M. L. García, Gesa, L., Gómez, V., Galera, Hernández, J. I. González, González-Peinado, R., Grözinger, U., Grohnert, S., Guàrdia, J., Guenther, E. W., Guijarro, A., de Guindos, E., Gutiérrez-Soto, J., Hagen, H. -J., Hatzes, A. P., Hauschildt, P. H., Hedrosa, R. P., Helmling, J., Henning, Th., Hermelo, I., Arabí, R. Hernández, Castaño, L. Hernández, Hernando, F. Hernández, Herrero, E., Huber, A., Huke, P., Johnson, E., de Juan, E., Kim, M., Klein, R., Klüter, J., Klutsch, A., Kürster, M., Lafarga, M., Lamert, A., Lampón, M., Lara, L. M., Laun, W., Lemke, U., Lenzen, R., Launhardt, R., del Fresno, M. López, López-González, J., López-Puertas, M., Salas, J. F. López, López-Santiago, J., Luque, R., Madinabeitia, H. Magán, Mall, U., Mancini, L., Mandel, H., Marfil, E., Molina, J. A. Marín, Maroto, D., Fernández, Martín, E. L., Martín-Ruiz, S., Marvin, C. J., Mathar, R. J., Mirabet, E., Montes, D., Moreno-Raya, M. E., Moya, A., Mundt, R., Nagel, E., Naranjo, V., Nortmann, L., Nowak, G., Ofir, A., Oreiro, R., Pallé, E., Panduro, J., Pascual, J., Passegger, V. M., Pavlov, A., Pedraz, S., Pérez-Calpena, A., Medialdea, D. Pérez, Perger, M., Perryman, M. A. C., Pluto, M., Rabaza, O., Ramón, A., Rebolo, R., Redondo, P., Reffert, S., Reinhart, S., Rhode, P., Rix, H. -W., Rodler, F., Rodríguez, E., Rodríguez-López, C., Trinidad, A. Rodríguez, Rohloff, R. -R., Rosich, A., Sadegi, S., Sánchez-Blanco, E., Carrasco, M. A. Sánchez, Sánchez-López, A., Sanz-Forcada, J., Sarkis, P., Sarmiento, L. F., Schäfer, S., Schmitt, J. H. M. M., Schiller, J., Schweitzer, A., Solano, E., Stahl, O., Strachan, J. B. P., Stürmer, J., Suárez, J. C., Tabernero, H. M., Tala, M., Trifonov, T., Tulloch, S. M., Ulbrich, R. G., Veredas, G., Linares, J. I. Vico, Vilardell, F., Wagner, K., Winkler, J., Wolthoff, V., Xu, W., Yan, F., and Osorio, M. R. Zapatero
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Astrophysics - Solar and Stellar Astrophysics ,Astrophysics - Earth and Planetary Astrophysics - Abstract
The CARMENES radial velocity (RV) survey is observing 324 M dwarfs to search for any orbiting planets. In this paper, we present the survey sample by publishing one CARMENES spectrum for each M dwarf. These spectra cover the wavelength range 520--1710nm at a resolution of at least $R > 80,000$, and we measure its RV, H$\alpha$ emission, and projected rotation velocity. We present an atlas of high-resolution M-dwarf spectra and compare the spectra to atmospheric models. To quantify the RV precision that can be achieved in low-mass stars over the CARMENES wavelength range, we analyze our empirical information on the RV precision from more than 6500 observations. We compare our high-resolution M-dwarf spectra to atmospheric models where we determine the spectroscopic RV information content, $Q$, and signal-to-noise ratio. We find that for all M-type dwarfs, the highest RV precision can be reached in the wavelength range 700--900nm. Observations at longer wavelengths are equally precise only at the very latest spectral types (M8 and M9). We demonstrate that in this spectroscopic range, the large amount of absorption features compensates for the intrinsic faintness of an M7 star. To reach an RV precision of 1ms$^{-1}$ in very low mass M dwarfs at longer wavelengths likely requires the use of a 10m class telescope. For spectral types M6 and earlier, the combination of a red visual and a near-infrared spectrograph is ideal to search for low-mass planets and to distinguish between planets and stellar variability. At a 4m class telescope, an instrument like CARMENES has the potential to push the RV precision well below the typical jitter level of 3-4ms$^{-1}$., Comment: accepted for publication in A&A, 13 pages plus 40 pages spectral atlas, first 10 atlas pages are reduced in quality to fit arXiv size limit; one CARMENES spectrum for each of the 324 stars is published in electronic format at http://carmenes.cab.inta-csic.es/
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226. The CARMENES search for exoplanets around M dwarfs. First visual-channel radial-velocity measurements and orbital parameter updates of seven M-dwarf planetary systems
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Trifonov, T., Kürster, M., Zechmeister, M., Tal-Or, L., Caballero, J. A., Quirrenbach, A., Amado, P. J., Ribas, I., Reiners, A., Reffert, S., Dreizler, S., Hatzes, A. P., Kaminski, A., Launhardt, R., Henning, Th., Montes, D., Béjar, V. J. S., Mundt, R., Pavlov, A., Schmitt, J. H. M. M., Seifert, W., Morales, J. C., Nowak, G., Jeffers, S. V., Rodríguez-López, C., del Burgo, C., Anglada-Escudé, G., López-Santiago, J., Mathar, R. J., Eiff, M. Ammler-von, Guenther, E. W., Barrado, D., Hernández, J. I. González, Mancini, L., Stürmer, J., Abril, M., Aceituno, J., Alonso-Floriano, F. J., Antona, R., Anwand-Heerwart, H., Arroyo-Torres, B., Azzaro, M., Baroch, D., Bauer, F. F., Becerril, S., Benítez, D., Berdiñas, Z. M., Bergond, G., Blümcke, M., Brinkmöller, M., Cano, J., Vázquez, M. C. Cárdenas, Casal, E., Cifuentes, C., Claret, A., Colomé, J., Cortés-Contreras, M., Czesla, S., Díez-Alonso, E., Feiz, C., Fernández, M., Ferro, I. M., Fuhrmeister, B., Galadí-Enríquez, D., Garcia-Piquer, A., Vargas, M. L. García, Gesa, L., Galera, V. Gómez, González-Peinado, R., Grözinger, U., Grohnert, S., Guàrdia, J., Guijarro, A., de Guindos, E., Gutiérrez-Soto, J., Hagen, H. -J., Hauschildt, P. H., Hedrosa, R. P., Helmling, J., Hermelo, I., Arabí, R. Hernández, Castaño, L. Hernández, Hernando, F. Hernández, Herrero, E., Huber, A., Huke, P., Johnson, E., de Juan, E., Kim, M., Klein, R., Klüter, J., Klutsch, A., Lafarga, M., Lampón, M., Lara, L. M., Laun, W., Lemke, U., Lenzen, R., del Fresno, M. López, López-González, J., López-Puertas, M., Salas, J. F. López, Luque, R., Madinabeitia, H. Magán, Mall, U., Mandel, H., Marfil, E., Molina, J. A. Marín, Fernández, D. Maroto, Martín, E. L., Martín-Ruiz, S., Marvin, C. J., Mirabet, E., Moya, A., Moreno-Raya, M. E., Nagel, E., Naranjo, V., Nortmann, L., Ofir, A., Oreiro, R., Pallé, E., Panduro, J., Pascual, J., Passegger, V. M., Pedraz, S., Pérez-Calpena, A., Medialdea, D. Pérez, Perger, M., Perryman, M. A. C., Pluto, M., Rabaza, O., Ramón, A., Rebolo, R., Redondo, P., Reinhardt, S., Rhode, P., Rix, H. -W., Rodler, F., Rodríguez, E., Trinidad, A. Rodríguez, Rohloff, R. -R., Rosich, A., Sadegi, S., Sánchez-Blanco, E., Carrasco, M. A. Sánchez, Sánchez-López, A., Sanz-Forcada, J., Sarkis, P., Sarmiento, L. F., Schäfer, S., Schiller, J., Schöfer, P., Schweitzer, A., Solano, E., Stahl, O., Strachan, J. B. P., Suárez, J. C., Tabernero, H. M., Tala, M., Tulloch, S. M., Veredas, G., Linares, J. I. Vico, Vilardell, F., Wagner, K., Winkler, J., Wolthoff, V., Xu, W., Yan, F., and Osorio, M. R. Zapatero
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Astrophysics - Earth and Planetary Astrophysics - Abstract
Context: The main goal of the CARMENES survey is to find Earth-mass planets around nearby M-dwarf stars. Seven M-dwarfs included in the CARMENES sample had been observed before with HIRES and HARPS and either were reported to have one short period planetary companion (GJ15A, GJ176, GJ436, GJ536 and GJ1148) or are multiple planetary systems (GJ581 and GJ876). Aims: We aim to report new precise optical radial velocity measurements for these planet hosts and test the overall capabilities of CARMENES. Methods: We combined our CARMENES precise Doppler measurements with those available from HIRES and HARPS and derived new orbital parameters for the systems. Bona-fide single planet systems are fitted with a Keplerian model. The multiple planet systems were analyzed using a self-consistent dynamical model and their best fit orbits were tested for long-term stability. Results: We confirm or provide supportive arguments for planets around all the investigated stars except for GJ15A, for which we find that the post-discovery HIRES data and our CARMENES data do not show a signal at 11.4 days. Although we cannot confirm the super-Earth planet GJ15Ab, we show evidence for a possible long-period ($P_{\rm c}$ = 7025$_{-629}^{+972}$ d) Saturn-mass ($m_{\rm c} \sin i$ = 51.8$_{-5.8}^{+5.5}M_\oplus$) planet around GJ15A. In addition, based on our CARMENES and HIRES data we discover a second planet around GJ1148, for which we estimate a period $P_{\rm c}$ = 532.6$_{-2.5}^{+4.1}$ d, eccentricity $e_{\rm c}$ = 0.34$_{-0.06}^{+0.05}$ and minimum mass $m_{\rm c} \sin i$ = 68.1$_{-2.2}^{+4.9}M_\oplus$. Conclusions: The CARMENES optical radial velocities have similar precision and overall scatter when compared to the Doppler measurements conducted with HARPS and HIRES. We conclude that CARMENES is an instrument that is up to the challenge of discovering rocky planets around low-mass stars., Comment: Accepted for publication in A&A, 24 pages, 16 figures, 14 tables
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227. Peace and the environment at the crossroads: Elections in a conflict-troubled biodiversity hotspot
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Salazar, Alejandro, Sanchez, Adriana, Dukes, Jeffrey S., Salazar, Juan F., Clerici, Nicola, Lasso, Eloisa, Sánchez-Pacheco, Santiago J., Rendón, Ángela M., Villegas, Juan C., Sierra, Carlos A., Poveda, Germán, Quesada, Benjamin, Uribe, Maria R., Rodríguez-Buriticá, Susana, Ungar, Paula, Pulido-Santacruz, Paola, Ruiz-Morato, Natalia, and Arias, Paola A.
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- 2022
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228. SPICA: Swiss portal for immune cell analysis.
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Massimo Andreatta, Fabrice P. A. David, Christian Iseli, Nicolas Guex, and Santiago J. Carmona
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- 2022
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229. Metacells untangle large and complex single-cell transcriptome networks
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Bilous, Mariia, Tran, Loc, Cianciaruso, Chiara, Gabriel, Aurélie, Michel, Hugo, Carmona, Santiago J., Pittet, Mikael J., and Gfeller, David
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- 2022
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230. Study of Wear on AISI E52100 Steel Using a Lithium Complex Grease and a Calcium Sulfonate Grease
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Márquez-Santiago, J. F., Vite-Torres, M., Gallardo-Hernandez, E. A., Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, and Abdel Wahab, Magd, editor
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- 2021
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231. Effectiveness of CPAP vs. Noninvasive Ventilation Based on Disease Severity in Obesity Hypoventilation Syndrome and Concomitant Severe Obstructive Sleep Apnea
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Riesco, Juan A., Gallego, Rocio, González-Mangado, Nicolás, Gomez-Garcia, Teresa, Martinez-Martinez, Maria A., Ojeda-Castillejo, Elena, López-Padilla, Daniel, Carrizo, Santiago J., Gallego, Begoña, Pallero, Mercedes, Romero, Odile, Ramón, Maria A., Arias, Eva, Muñoz-Méndez, Jesús, Senent, Cristina, Sancho-Chust, Jose N., Navarro-Soriano, Nieves B., Barrot, Emilia, Benítez, José M., Sanchez-Gómez, Jesús, Golpe, Rafael, Gómez-Mendieta, María A., Gomez, Silvia, Bengoa, Mónica, Masa, Juan F., Benítez, Iván D., Sánchez-Quiroga, Maria Á., Gomez de Terreros, Francisco J., Corral, Jaime, Romero, Auxiliadora, Caballero-Eraso, Candela, Ordax-Carbajo, Estrella, Troncoso, Maria F., González, Mónica, López-Martín, Soledad, Marin, José M., Martí, Sergi, Díaz-Cambriles, Trinidad, Chiner, Eusebi, Egea, Carlos, Barca, Javier, Vázquez-Polo, Francisco J., Negrín, Miguel A., Martel-Escobar, María, Barbé, Ferrán, and Mokhlesi, Babak
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- 2022
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232. Requirements for corrosion inhibitor release from damaged primers for stable protection: A simulation and experimental approach using cerium loaded carriers
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Denissen, Paul J., Homborg, Axel M., and Garcia, Santiago J.
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- 2022
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233. Temporal and spatial variations of the absolute reflectivity of Jupiter and Saturn from 0.38 to 1.7 $\mu$m with PlanetCam-UPV/EHU
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Mendikoa, I., Sánchez-Lavega, A., Pérez-Hoyos, S., Hueso, R., Rojas, J. F., and López-Santiago, J.
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Astrophysics - Earth and Planetary Astrophysics ,Astrophysics - Instrumentation and Methods for Astrophysics - Abstract
We provide measurements of the absolute reflectivity of Jupiter and Saturn along their central meridians in filters covering a wide range of visible and near-infrared wavelengths (from 0.38 to 1.7 $\mu$m) that are not often presented in the literature. We also give measurements of the geometric albedo of both planets and discuss the limb-darkening behavior and temporal variability of their reflectivity values for a period of four years (2012-2016). This work is based on observations with the PlanetCam-UPV/EHU instrument at the 1.23 m and 2.2 m telescopes in Calar Alto Observatory (Spain). The instrument simultaneously observes in two channels: visible (VIS; 0.38-1.0 $\mu$m) and short-wave infrared (SWIR; 1.0--1.7 $\mu$m). We obtained high-resolution observations via the lucky-imaging method. We show that our calibration is consistent with previous independent determinations of reflectivity values of these planets and, for future reference, provide new data extended in the wavelength range and in the time. Our results have an uncertainty in absolute calibration of 10--20\%. We show that under the hypothesis of constant geometric albedo, we are able to detect absolute reflectivity changes related to planetary temporal evolution of about 5-10\%., Comment: 13 pages, 18 figures, (in press)
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- 2017
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234. Acoustic study and architectural proposals to improve acoustic comfort in a university campus of Mexico City
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Kuri, Antonio B. and Pérez R., Santiago J.
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- 2022
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235. Nosocomial COVID-19 infection in women undergoing elective cesarean delivery: a prospective cohort study
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Nizam, Aaron, Nimaroff, Michael L., Menzin, Andrew W., Goldberg, Gary L., Miyara, Santiago J., and Molmenti, Ernesto
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- 2022
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236. The Fanconi anemia pathway and Breast Cancer: A comprehensive review of clinical data
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Gianni, Panagiota, Matenoglou, Evangelia, Geropoulos, Georgios, Agrawal, Nirav, Adnani, Harsha, Zafeiropoulos, Stefanos, Miyara, Santiago J., Guevara, Sara, Mumford, James M., Molmenti, Ernesto P., and Giannis, Dimitrios
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- 2022
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237. Capacitive Deionization -- defining a class of desalination technologies
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Biesheuvel, P. M., Bazant, M. Z., Cusick, R. D., Hatton, T. A., Hatzell, K. B., Hatzell, M. C., Liang, P., Lin, S., Porada, S., Santiago, J. G., Smith, K. C., Stadermann, M., Su, X., Sun, X., Waite, T. D., van der Wal, A., Yoon, J., Zhao, R., Zou, L., and Suss, M. E.
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Physics - Applied Physics - Abstract
Over the past decade, capacitive deionization (CDI) has realized a surge in attention in the field of water desalination and can now be considered as an important technology class, along with reverse osmosis and electrodialysis. While many of the recently developed technologies no longer use a mechanism that follows the strict definition of the term "capacitive", these methods nevertheless share many common elements that encourage treating them with similar metrics and analyses. Specifically, they all involve electrically driven removal of ions from a feed stream, storage in an electrode (i.e., ion electrosorption) and release, in charge/discharge cycles. Grouping all these methods in the technology class of CDI makes it possible to treat evolving new technologies in standardized terms and compare them to other technologies in the same class.
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- 2017
238. Lepton Flavor Changing Higgs decays in the Littlest Higgs Model with T-parity
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del Aguila, F., Ametller, Ll., Illana, J. I., Santiago, J., Talavera, P., and Vega-Morales, R.
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High Energy Physics - Phenomenology - Abstract
We calculate loop induced lepton flavor violating Higgs decays in the Littlest Higgs model with T-parity. We find that a finite amplitude is obtained only when all contributions from the T-odd lepton sector are included. This is in contrast to lepton flavor violating processes mediated by gauge bosons where the partners of the right-handed mirror leptons can be decoupled from the spectrum. These partners are necessary to cancel the divergence in the Higgs mass introduced by the mirror leptons but are otherwise unnecessary and assumed to be decoupled in previous phenomenological studies. Furthermore, as we emphasize, including the partner leptons in the spectrum also introduces a new source of lepton flavor violation via their couplings to the physical pseudo-Goldstone electroweak triplet scalar. Although this extra source also affects lepton flavor changing gauge transitions, it decouples from these amplitudes in the limit of heavy mass for the partner leptons. We find that the corresponding Higgs branching ratio into taus and muons can be as large as $\sim 0.2 \times 10^{-6}$ for T-odd masses of the order a few TeV, a demanding challenge even for the high luminosity LHC., Comment: 26 pages, 1 figure. Typos corrected
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- 2017
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239. Young's modulus of 2D materials extracted from their nonlinear dynamic response
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Davidovikj, Dejan, Alijani, Farbod, Cartamil-Bueno, Santiago J., van der Zant, Herre S. J., Amabili, Marco, and Steeneken, Peter G.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
Due to their atomic-scale thickness, the resonances of 2D material membranes show signatures of nonlinearities at amplitudes of only a few nanometers. While the linear dynamics of membranes is well understood, the exact relation between the nonlinear response and the resonator's material properties has remained elusive. In this work, we propose a method to determine the Young's modulus of suspended 2D material membranes from their nonlinear dynamic response. The method is demonstrated by interferometric measurements on graphene and MoS2 resonators, which are electrostatically driven into the nonlinear regime at multiple driving forces. It is shown that a set of response curves can be fitted by the solutions of the Duffing equation using only one fit parameter, from which the Young's modulus is extracted using membrane theory. Our method is fast, contactless, and provides a platform for high-frequency characterization of the mechanical properties of 2D materials.
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- 2017
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240. NGC 6067: a young and massive open cluster with high metallicity
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Alonso-Santiago, J., Negueruela, I., Marco, A., Tabernero, H. M., González-Fernández, C., and Castro, N.
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Astrophysics - Astrophysics of Galaxies - Abstract
NGC 6067 is a young open cluster hosting the largest population of evolved stars among known Milky Way clusters in the 50-150 Ma age range. It thus represents the best laboratory in our Galaxy to constrain the evolutionary tracks of 5-7 M$_{\odot}$ stars. We have used high-resolution spectra of a large sample of bright cluster members (45), combined with archival photometry, to obtain accurate parameters for the cluster as well as stellar atmospheric parameters. We derive a distance of 1.78$\pm$0.12 kpc, an age of 90$\pm$20 Ma and a tidal radius of 14.8$^{6.8}_{3.2}$ arcmin. We estimate an initial mass above 5700 M$_{\odot}$, for a present-day evolved population of two Cepheids, two A supergiants and 12 red giants with masses $\approx$6 M$_{\odot}$. We also determine chemical abundances of Li, O, Na, Mg, Si, Ca, Ti, Ni, Rb, Y and Ba for the red clump stars. We find a supersolar metallicity, [Fe/H]=+0.19$\pm$0.05, and a homogeneus chemical composition, consistent with the Galactic metallicity gradient. The presence of a Li-rich red giant, star 276 with A(Li)=2.41, is also detected. An over-abundance of Ba is found, supporting the enhanced $s$-process. The ratio of yellow to red giants is much smaller than one, in agreement with models with moderate overshooting, but the properties of the cluster Cepheids do not seem consistent with current Padova models for supersolar metallicity., Comment: 27 pages, 21 figures, 17 tables, Accepted for publication in MNRAS
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- 2017
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241. Optomechanics for thermal characterization of suspended graphene
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Dolleman, Robin J., Houri, Samer, Davidovikj, Dejan, Cartamil-Bueno, Santiago J., Blanter, Yaroslav M., van der Zant, Herre S. J., and Steeneken, Peter G.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
Thermal properties of suspended single-layer graphene membranes are investigated by characterization of their mechanical motion in response to a high-frequency modulated laser. A characteristic delay time $\tau$ between the optical intensity and mechanical motion is observed, which is attributed to the time required to raise the temperature of the membrane. We find, however, that the measured time constants are significantly larger than the predicted ones based on values of the specific heat and thermal conductivity. In order to explain the discrepancy between measured and modeled tau, a model is proposed that takes a thermal boundary resistance at the edge of the graphene drum into account. The measurements provide a noninvasive way to characterize thermal properties of suspended atomically thin membranes, providing information that can be hard to obtain by other means.
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- 2017
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242. The Gaia-ESO Survey: Structural and dynamical properties of the young cluster Chamaeleon I
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Sacco, G. G., Spina, L., Randich, S., Palla, F., Parker, R. J., Jeffries, R. D., Jackson, R., Meyer, M. R., Mapelli, M., Lanzafame, A. C., Bonito, R., Damiani, F., Franciosini, E., Frasca, A., Klutsch, A., Prisinzano, L., Tognelli, E., Degl'Innocenti, S., Moroni, P. G. Prada, Alfaro, E. J., Micela, G., Prusti, T., Barrado, D., Biazzo, K., Bouy, H., Bravi, L., Lopez-Santiago, J., Wright, N. J., Bayo, A., Gilmore, G., Bragaglia, A., Flaccomio, E., Koposov, S. E., Pancino, E., Casey, A. R., Costado, M. T., Donati, P., Hourihane, A., Jofre', P., Lardo, C., Lewis, J., Magrini, L., Monaco, L., Morbidelli, L., Sousa, S., Worley, C. C., and Zaggia, S.
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Astrophysics - Solar and Stellar Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
The young (~2 Myr) cluster Chamaeleon I is one of the closest laboratories to study the early stages of star cluster dynamics in a low-density environment. We studied its structural and kinematical properties combining parameters from the high-resolution spectroscopic survey Gaia-ESO with data from the literature. Our main result is the evidence of a large discrepancy between the velocity dispersion (sigma = 1.14 \pm 0.35 km s^{-1}) of the stellar population and the dispersion of the pre-stellar cores (~0.3 km s^{-1}) derived from submillimeter observations. The origin of this discrepancy, which has been observed in other young star clusters is not clear. It may be due to either the effect of the magnetic field on the protostars and the filaments, or to the dynamical evolution of stars driven by two-body interactions. Furthermore, the analysis of the kinematic properties of the stellar population put in evidence a significant velocity shift (~1 km s^{-1}) between the two sub-clusters located around the North and South main clouds. This result further supports a scenario, where clusters form from the evolution of multiple substructures rather than from a monolithic collapse. Using three independent spectroscopic indicators (the gravity indicator $\gamma$, the equivalent width of the Li line, and the H_alpha 10\% width), we performed a new membership selection. We found six new cluster members located in the outer region of the cluster. Starting from the positions and masses of the cluster members, we derived the level of substructure Q, the surface density \Sigma and the level of mass segregation $\Lambda_{MSR}$ of the cluster. The comparison between these structural properties and the results of N-body simulations suggests that the cluster formed in a low density environment, in virial equilibrium or supervirial, and highly substructured., Comment: Accepted for publication on Astronomy and Astrophysics
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- 2017
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243. Comprehensive analysis of ordering in CoCrNi and CrNi2 alloys.
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Bacurau, Vinícius P., Moreira, Pedro A. F. P., Bertoli, Gustavo, Andreoli, Angelo F., Mazzer, Eric, de Assis, Flávio F., Gargarella, Piter, Koga, Guilherme, Stumpf, Guilherme C., Figueroa, Santiago J. A., Widom, Michael, Kaufman, Michael, Fantin, Andrea, Cao, Yifan, Freitas, Rodrigo, Miracle, Daniel, and Coury, Francisco G.
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TENSILE tests ,TRANSMISSION electron microscopy ,X-ray absorption ,THERMAL analysis ,X-ray spectroscopy - Abstract
Chemical Short-Range Order (CSRO) has attracted recent attention from many researchers, creating intense debates about its impact on material properties. The challenges lie in confirming and quantifying CSRO, as its detection proves exceptionally demanding, contributing to conflicting data in the literature regarding its true effects on mechanical properties. Our work uses high-precision calorimetric data to unambiguously prove the existence and, coupled with atomistic simulations, quantify the type of CSRO. This methodology allows us to propose a mechanism for its formation and destruction based on the heat evolution during thermal analysis and facilitates a precise identification of local ordering in CoCrNi alloys. Samples of CoCrNi (Co
33 Cr33 Ni33 ) and CrNi2 (Cr33 Ni66 ) alloys are fabricated in varying ordered states, extensively characterized via synchrotron X-ray diffraction, X-ray absorption spectroscopy, and transmission electron microscopy. Samples with considerably different ordered states are submitted to tensile tests with in-situ synchrotron X-ray diffraction. We demonstrate, despite inducing varied CSRO levels in CoCrNi, no significant alterations in overall mechanical behavior emerge. However, the CrNi2 alloy, which undergoes long-range ordering, experiences significant shifts in yield strength, ultimate tensile stress and ductility. Here authors use calorimetry to quantify chemical short-range order (CSRO) experimentally, in good agreement with atomistic simulations. Synchrotron in-situ tensile testing showed no effect of varied CSRO levels on mechanical properties. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
244. Healable Supracolloidal Nanocomposite Water-Borne Coatings.
- Author
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Li, Siyu, van der Ven, Leendert G. J., Garcia, Santiago J., and Esteves, A. Catarina C.
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- 2024
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245. Water-triggered self-healing and reversible underwater adhesion in metalorganic polymers.
- Author
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Kaymazlar, Elif, Andac, Omer, and Garcia, Santiago J.
- Abstract
The strategies used by organisms living in water to adhere to surfaces have been a major source of inspiration to develop synthetic underwater adhesives. Amongst the mechanisms explored, byssus-inspired metalorganic chemistry offers a broad range of possibilities due to the breath of coordination bonds, salts and polymer backbones available. This has led to a significant amount of research on bio-inspired synthetic glue-type (liquid) and tape-type (solid) adhesives. However, reversibility under water, durability and universality of adhesion remains elusive. We demonstrate that the combination of Ni-metalorganic chemistry with a flexible hydrophobic polymer allows developing fully healable and recyclable polymers able to reversibly adhere (under water) to substrates with surface energies as diverse as Teflon and glass. Other metal ions such as Fe
3+ and Zn2+ did not provide the desired adhesion in water. The underlying mechanism is attributed to local water-induced chain re-orientation and the use of strong but dynamic metalorganic coordination (Ni2+ -2,5-thiophenedicarboxaldehyde). The results unveil a versatile route to develop solid-state underwater adhesives and water-triggered healing polymers using a one-pot synthesis strategy (Schiff-base with metal coordination) with an underlying mechanism that can be extrapolated to different application domains such as biomedical, energy and underwater soft robotics. [ABSTRACT FROM AUTHOR]- Published
- 2024
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246. Differential Mitochondrial Bioenergetics in Neurons and Astrocytes Following Ischemia-Reperfusion Injury and Hypothermia.
- Author
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Miyara, Santiago J., Shinozaki, Koichiro, Hayashida, Kei, Shoaib, Muhammad, Choudhary, Rishabh C., Zafeiropoulos, Stefanos, Guevara, Sara, Kim, Junhwan, Molmenti, Ernesto P., Volpe, Bruce T., and Becker, Lance B.
- Subjects
LYSIS ,ADENOSINE triphosphate ,REACTIVE oxygen species ,THERAPEUTIC hypothermia ,LACTATE dehydrogenase - Abstract
The close interaction between neurons and astrocytes has been extensively studied. However, the specific behavior of these cells after ischemia-reperfusion injury and hypothermia remains poorly characterized. A growing body of evidence suggests that mitochondria function and putative transference between neurons and astrocytes may play a fundamental role in adaptive and homeostatic responses after systemic insults such as cardiac arrest, which highlights the importance of a better understanding of how neurons and astrocytes behave individually in these settings. Brain injury is one of the most important challenges in post-cardiac arrest syndrome, and therapeutic hypothermia remains the single, gold standard treatment for neuroprotection after cardiac arrest. In our study, we modeled ischemia-reperfusion injury by using in vitro enhanced oxygen-glucose deprivation and reperfusion (eOGD-R) and subsequent hypothermia (HPT) (31.5 °C) to cell lines of neurons (HT-22) and astrocytes (C8-D1A) with/without hypothermia. Using cell lysis (LDH; lactate dehydrogenase) as a measure of membrane integrity and cell viability, we found that neurons were more susceptible to eOGD-R when compared with astrocytes. However, they benefited significantly from HPT, while the HPT effect after eOGD-R on astrocytes was negligible. Similarly, eOGD-R caused a more significant reduction in adenosine triphosphate (ATP) in neurons than astrocytes, and the ATP-enhancing effects from HPT were more prominent in neurons than astrocytes. In both neurons and astrocytes, measurement of reactive oxygen species (ROS) revealed higher ROS output following eOGD-R, with a non-significant trend of differential reduction observed in neurons. HPT after eOGD-R effectively downregulated ROS in both cells; however, the effect was significantly more effective in neurons. Lipid peroxidation was higher after eOGD-R in neurons, while in astrocytes, the increase was not statistically significant. Interestingly, HPT had similar effects on the reduction in lipoperoxidation after eOGD-R with both types of cells. While glutathione (GSH) levels were downregulated after eOGD-R in both cells, HPT enhanced GSH in astrocytes, but worsened GSH in neurons. In conclusion, neuron and astrocyte cultures respond differently to eOGD-R and eOGD-R + HTP treatments. Neurons showed higher sensitivity to ischemia-reperfusion insults than astrocytes; however, they benefited more from HPT therapy. These data suggest that given the differential effects from HPT in neurons and astrocytes, future therapeutic developments could potentially enhance HPT outcomes by means of neuronal and astrocytic targeted therapies. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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247. Optical projection tomography implemented for accessibility and low cost (OPTImAL).
- Author
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Darling, C., Kumar, S., Alexandrov, Y., de Faye, J., Santiago, J. Almagro, Rýdlová, A., Bugeon, L., Dallman, M. J., Behrens, A. J., French, P. M. W., and McGinty, J.
- Abstract
Optical projection tomography (OPT) is a threedimensional mesoscopic imaging modality that can use absorption or fluorescence contrast, and is widely applied to fixed and live samples in the mm-cm scale. For fluorescence OPT, we present OPT implemented for accessibility and low cost, an open-source research-grade implementation of modular OPT hardware and software that has been designed to be widely accessible by using low-cost components, including light-emitting diode (LED) excitation and cooled complementary metal-oxidesemiconductor (CMOS) cameras. Both the hardware and software are modular and flexible in their implementation, enabling rapid switching between sample size scales and supporting compressive sensing to reconstruct images from undersampled sparse OPT data, e.g. to facilitate rapid imaging with low photobleaching/phototoxicity. We also explore a simple implementation of focal scanning OPT to achieve higher resolution, which entails the use of a fan-beam geometry reconstruction method to account for variation in magnification. This article is part of the Theo Murphy meeting issue 'Open, reproducible hardware for microscopy'. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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248. The young open cluster NGC 7067 using Str\'omgren photometry
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Monguió, M., Negueruela, I., Marco, A., González-Fernández, C., Alonso-Santiago, J., Costado, M. T., Casamiquela, L., López-Corredoira, M., Molgó, J., Vilardell, F., Alfaro, E. J., Antoja, T., Figueras, F., Garcia, M., Jordi, C., and Romero-Gómez, M.
- Subjects
Astrophysics - Astrophysics of Galaxies - Abstract
NGC 7067 is a young open cluster located in the direction between the first and the second Galactic quadrants and close to the Perseus spiral arm. This makes it useful for studies of the nature of the Milky Way spiral arms. Stromgren photometry taken with the Wide Field Camera at the Isaac Newton Telescope allowed us to compute individual physical parameters for the observed stars and hence to derive cluster's physical parameters. Spectra from the 1.93-m telescope at the Observatoire de Haute-Provence helped to check and improve the results. We obtained photometry for 1233 stars, individual physical parameters for 515 and spectra for 9 of them. The 139 selected cluster members lead to a cluster distance of 4.4+/-0.4 kpc, with an age below log10(t(yr))=7.3 and a present Mass of 1260+/-160Msun. The morphology of the data reveals that the centre of the cluster is at (ra,dec)=(21:24:13.69,+48:00:39.2) J2000, with a radius of 6.1arcsec. Stromgren and spectroscopic data allowed us to improve the previous parameters available for the cluster in the literature., Comment: 14 pages, 15 figures, 6 tables
- Published
- 2016
249. Estimation of Admission D-dimer Cut-off Value to Predict Venous Thrombotic Events in Hospitalized COVID-19 Patients: Analysis of the SEMI-COVID-19 Registry
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García-Cervera, Carles, Giner-Galvañ, Vicente, Wikman-Jorgensen, Philip, Laureiro, Jaime, Rubio-Rivas, Manuel, Gurjian Arena, Anthony, Arnalich-Fernandez, Francisco, Beato Pérez, José Luis, Vargas Núñez, Juan Antonio, González Igual, Jesús Javier, Díez-Manglano, Jesús, Méndez Bailón, Manuel, García Blanco, María José, Freire Castro, Santiago J., Aranda Lobo, Judit, Manzano, Luis, Magallanes Gamboa, Jeffrey Oskar, Arribas Pérez, Luis, González Moraleja, Julio, Calderón Hernaiz, Ruth, García Alegría, Javier, González Noya, Amara, Gómez Huelgas, Ricardo, Lumbreras Bermejo, Carlos, and Antón Santos, Juan Miguel
- Published
- 2021
- Full Text
- View/download PDF
250. Familial monophasic acute transverse myelitis due to the pathogenic variant in VPS37A
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Mealy, Maureen A, Nam, Tai-Seung, Pardo, Santiago J, Pardo, Carlos A, Sobreira, Nara L, Avramopoulos, Dimitrios, Valle, David, Burns, Kathleen H, and Levy, Michael
- Subjects
Biological Sciences ,Biomedical and Clinical Sciences ,Clinical Sciences ,Genetics ,Rare Diseases ,Neurosciences ,Clinical Research ,Brain Disorders ,2.1 Biological and endogenous factors ,Aetiology ,Clinical sciences - Abstract
ObjectiveTo identify genetic differences among siblings with a family history of idiopathic transverse myelitis (ITM).MethodsWe compared whole-exome sequencing (WES) on germline samples from the 2 affected sisters with ITM with 3 of their healthy siblings.ResultsThe 2 sisters with ITM both had acute onset of sensory loss in the legs, weakness, and bowel/bladder dysfunction. The first developed ITM at age 15 years with a clinical nadir of complete paralysis, which slowly recovered over a few years. MRI demonstrated a persistent T2 lesion in the lower thoracic cord. The second developed ITM at age 50 years with a nadir of sensory loss from T6 down and paraparesis in the legs, associated with an MRI lesion at T6. She also made a partial recovery with treatment. Both sisters are homozygous for a missense variant in VPS37A (c.700C>A, p.Leu234Ile) identified by WES. We performed targeted sequencing of VPS37A in an additional 86 samples from patients with ITM and 175 with other diseases to investigate the p.Leu234Ile variant. We identified another patient with ITM homozygous for the same rare variant. No patients with multiple sclerosis, neuromyelitis optica, other neurologic conditions, or any healthy controls in public databases were homozygous for this variant.ConclusionsA rare missense variant in VPS37A may predispose to development of ITM. Further studies are necessary to determine the frequency of this variant in the patient population and the mechanism through which it contributes to the risk of disease.
- Published
- 2018
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