Search results for "ESA"
showing 10 items of 11914 documents
Búsqueda e identificación de nuevas causas genéticas o epigenéticas de trastornos del neurodesarrollo
2015
Los trastornos del neurodesarrollo engloban desordenes cognitivos, de aprendizaje, comportamiento, comunicación y motores, que aparecen en edad temprana, como la discapacidad intelectual (DI) o los trastornos del espectro autista (TEA). Se trata de patologías complejas, debidas a alteraciones en el desarrollo del sistema nervioso central (SNC), que pueden presentan agregación familiar o asociarse a otras anomalías congénitas o rasgos dismórficos. Pese a que la causa de este tipo de trastornos en muchos casos es desconocida, existen claras evidencias sobre sus bases genéticas, con un gran número de síndromes descritos que cursan con DI asociados a diversas variantes en número de copias (CNVs…
CARS spectroscopy of CH4 for implication of temperature measurements in supercritical LOX/CH4 combustion
2007
International audience; Experimental and theoretical investigations of coherent anti-Stokes Raman spectroscopy of CH4 have been carried out. Experimental spectra were measured in a heated high-pressure test cell and compared with numerical simulations. Good agreement was obtained for the temperature and the pressure dependence of CARS spectra in the ranges 300-1100 K and 0.1-5.0 MPa. The observed dependencies provide useful guidance for CARS thermometry, allowing quantitative measurements of temperature in high-pressure combustors. Application of multiplex CH4 CARS thermometry for single-shot measurements in a LOX/CH4 combustion at high pressure was demonstrated at supercritical conditions …
Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes
2015
Coulomb-excitation experiments are performed with postaccelerated beams of neutron-deficient Po196,198,200,202 isotopes at the REX-ISOLDE facility. A set of matrix elements, coupling the low-lying states in these isotopes, is extracted. In the two heaviest isotopes, Po200,202, the transitional and diagonal matrix elements of the 2+1 state are determined. In Po196,198 multistep Coulomb excitation is observed, populating the 4+1,0+2, and 2+2 states. The experimental results are compared to the results from the measurement of mean-square charge radii in polonium isotopes, confirming the onset of deformation from Po196 onwards. Three model descriptions are used to compare to the data. Calculati…
Acte clair doktrīna Eiropas Savienības tiesībās
2020
Līguma par Eiropas Savienības darbību 267.panta trešajā daļā ir noteikts Eiropas Savienības dalībvalstu pēdējo instanču tiesu pienākums vērsties Eiropas Savienības tiesā pēc prejudiciāla nolēmuma, ja lietā nepieciešama Eiropas Savienības tiesību interpretācija. Atkāpes no šī pienākuma Eiropas Savienības tiesa noteikusi CILFIT spriedumā. Vislielāko uzmanību sev pievērsusi tieši šajā spriedumā adaptētā Acte clair doktrīna, kas tiesām atļauj nevērsties Eiropas Savienības tiesā, ja Eiropas Savienības tiesību piemērošana ir tik acīmredzama, ka tā neatstāj vietu nekādām saprātīgām šaubām. Jau no doktrīnas ieviešanas brīža Eiropas Savienības tiesībās tā juristu vidū ir izpelnījusies kritiku par tā…
Gaining or losing PhDs: What are the effects on firms' linkages with universities?
2023
PhD graduates can help companies transfer knowledge from universities to firms. Scholars have analysed the determinants of PhD recruitment by firms and its effects on their innovation activities. However, little is known about what happens when a firm loses employees with PhDs. The aim of this paper is to compare the effects on the relationships of firms with universities when these firms lose PhDs versus when they hire PhDs to work in R&D. These effects may be symmetrical or non-symmetrical depending on the abilities of firms to retain the connections and knowledge acquired by hiring PhDs. We consider four types of relationships: collaboration with universities, universities as a source of…
LASCA and PPG imaging for non-contact assessment of skin blood supply
2013
Laser speckle contrast analysis (LASCA) offers a non-contact, full-field, and real-time mapping of capillary blood flow and can be considered as an alternative method to Laser Doppler perfusion imaging (LDPI). Photoplethysmography (PPG) is well known technique for assessment of skin blood pulsations that can be related to blood flow. In recent years several studies have been done on development of non-contact PPG imaging (PPGI). LASCA and PPGI techniques are simpler and cheaper compared with LDPI. LASCA technique has been implemented in several commercial instruments. However, these systems are still too expensive and bulky to be widely available. Several optical techniques have found new i…
La protezione dell’ambiente nel Trattato COMESA
2000
L'articolo esamina il tema della protezione dell'ambiente ai sensi del trattato del COMESA.
Monogamy Inequality for Distributed Gaussian Entanglement
2007
We show that for all n-mode Gaussian states of continuous variable systems, the entanglement shared among n parties exhibits the fundamental monogamy property. The monogamy inequality is proven by introducing the Gaussian tangle, an entanglement monotone under Gaussian local operations and classical communication, which is defined in terms of the squared negativity in complete analogy with the case of n-qubit systems. Our results elucidate the structure of quantum correlations in many-body harmonic lattice systems.
Controlling molecular alignment rephasing through interference of Raman-induced rotational coherence
2000
0021-9606; Quantum control over molecular alignment rephasing is experimentally investigated in gaseous CO2. The control process is achieved by illuminating the medium with a pair of pump-pulses separated in time by approximately an integer value of T0=1/8B(0), where B(0) is the rotational constant. Through a Raman-type process, each pulse alone produces rotational coherence leading to a periodic orientational anisotropy. It is the combination of the two pulses that yields to quantum interference, resulting in a modification of this anisotropy probed by a third delayed pulse. The effect is accurately analyzed for different time delays between the two pulses. A theoretical analysis supplies …
Abelian realization of phenomenological two-zero neutrino textures
2014
In an attempt at explaining the observed neutrino mass-squared differences and leptonic mixing, lepton mass matrices with zero textures have been widely studied. In the weak basis where the charged lepton mass matrix is diagonal, various neutrino mass matrices with two zeros have been shown to be consistent with the current experimental data. Using the canonical and Smith normal form methods, we construct the minimal Abelian symmetry realizations of these phenomenological two-zero neutrino textures. The implementation of these symmetries in the context of the seesaw mechanism for Majorana neutrino masses is also discussed.