Search results for " mes"
showing 10 items of 3765 documents
Phonons in MoSe2/WSe2 van der Waals heterobilayer
2021
We report first-principles calculations of the structural and vibrational properties of the synthesized two-dimensional van der Waals heterostructures formed by single-layers dichalcogenides MoSe2 and WSe2. We show that, when combining these systems in a periodic two-dimensional heterostructures, the intrinsic phonon characteristics of the free-standing constituents are to a large extent preserved but, furthermore, exhibit shear and breathing phonon modes that are not present in the individual building blocks. These peculiar modes depend strongly on the weak vdW forces and has a great contibution to the thermal properties of the layered materials. Besides these features, the departure of fl…
Fractal dynamics in chaotic quantum transport
2013
Despite several experiments on chaotic quantum transport in two-dimensional systems such as semiconductor quantum dots, corresponding quantum simulations within a real-space model have been out of reach so far. Here we carry out quantum transport calculations in real space and real time for a two-dimensional stadium cavity that shows chaotic dynamics. By applying a large set of magnetic fields we obtain a complete picture of magnetoconductance that indicates fractal scaling. In the calculations of the fractality we use detrended fluctuation analysis -- a widely used method in time series analysis -- and show its usefulness in the interpretation of the conductance curves. Comparison with a s…
Considerazioni sulle tecniche costruttive rilevabili nella torre del castello di Brolo
2017
Il contributo espone un'analisi storica delle tecniche costruttive murarie nella torre del castello di Brolo, in Sicilia, inquadrandole nella sfera degli studi sull'argomento. Per la Sicilia i paramenti murari che non sono ancora stati studiati in modo da potere essere catalogati e attribuiti a determinati periodi della storia dell'architettura sono quelli legati alla costruzione che utilizza conci sbozzati o informi. In genere sono paramenti murari in cui gli elementi impiegati non rispondono a regole stereometriche riconducibili ad una precisa cultura del costruire. Si tratta di una tecnica costruttiva muraria che è stata adoperata per la costruzione di edifici il più delle volte con gran…
SMS Messages in a Daily Finnish Newspaper : The Contect of Proverb Performances
2016
The article focuses on Finnish proverbs as a part of contemporary colloquial written language in everyday use and context. The article offers a view on what is happening with proverbs in the vernacular in Finnish everyday life. Most traditional Finnish proverbs originate from an agrarian context and still use agrarian language, even if nowadays they live in a new context with a new meaning. As empirical material this article uses a special case that demonstrates the use of proverbs in one Finnish newspaper: proverbs in SMS messages published as a letter to the editor in a newspaper. peerReviewed
Group‐based instant messaging in Finnish residential elder care work : taming the technology or vice versa?
2022
As new communication technologies become embedded in care work, there is a need to understand how they affect its temporal order. This article analyses group-based mobile instant messaging (IM) in residential elder care work in Finland. The article asks (i) how care workers use group-based messaging for work; and (ii) how they negotiate the rules for its use. Theoretically, the article draws on science and technology studies focusing on ‘taming’ and ‘unleashing’ (Pols, 2017), and temporality (Wajcman, 2008). Analysis is based on a qualitative interview study of care workers and nurses (n = 25) conducted in 2018. The results showed how the time-shifting functionality of IM allows employees t…
Terapia Celular en Enfermedades Desmielinizantes
2021
Antecedentes y estado actual del tema: La Esclerosis Múltiple es una enfermedad autoinmune y neurodegenerativa crónica de base inflamatoria que afecta a la sustancia gris y blanca del sistema nervioso central. Se caracteriza por la presencia de lesiones focales desmielinizantes y afectación difusa del tejido nervioso aparentemente normal, siendo la discapacidad consecuencia de la neurodegeneración progresiva, a la que se superpone la discapacidad que pueda aparecer como consecuencia de un brote. Los llamados tratamientos modificadores de la Esclerosis Múltiple limitan los brotes de inflamación que acontecen en la forma remitente-recurrente pero apenas modifican la progresión de la discapaci…
Direccionamiento de células madre mesenquimales adultas para el tratamiento del infarto cerebral mediante la aplicación de campos magnéticos
2017
La terapia con células madre mesenquimales (MSCs) resulta una opción prometedora para el tratamiento después del infarto cerebral, debido a las ventajas que presentan éstas frente a otros tipos de células madre: (i) pueden obtenerse en la práctica clínica mediante técnicas mínimamente invasivas, (ii) su cultivo primario y expansión in vitro resultan muy eficientes, (iii) poseen tropismo por las zonas lesionadas (homing) y (iv) tienen capacidad inmunomoduladora y antiinflamatoria en el organismo receptor. Todo ello, ha hecho que se conviertan en unas perfectas candidatas como agente terapéutico después del ictus, habiendo concluido varios ensayos clínicos con una mejor recuperación funcional…
Applications and non-idealities of submicron Al–AlOx–Nb tunnel junctions
2016
We have developed a technique to fabricate sub-micron, 0.6µm×0.6µm Al-AlOx-Nb tunnel junctions using a standard e-beam resist, angle evaporation and double oxidation of the tunneling barrier, resulting in high quality niobium, as determined by the the high measured values of the critical temperature TC ∼ 7.5 K and the gap ∆ ∼ 1.3 meV. The devices show great promise for local nanoscale thermometry in the temperature range 1 - 7.5 K. Electrical characterization of the junctions was performed at sub-Kelvin temperatures both with and without an external magnetic field, which was used to suppress superconductivity in Al and thus bring the junction into a normal-metal-insulator-superconductor (NI…
Utilisation des critères non financiers pour évaluer ou piloter la performance : analyse théorique
2005
The determinants which explain the use of non-financial measures in order to evaluate or drive the performance belong to disciplinary (contractual) and knowledge-based approaches. The aim of this paper is to propose a theoretical analysis of these explanations. For the disciplinary view, we realize a typology of the existing literature. We show that others theories explain the choice of non-financial measures too. For the knowledge-based view, we propose a synthesis of the existing literature in which the link between non-financial and theoretical explanations exists. Finally, we explain why the Balanced Scorecard can be associated to the disciplinary view and the Intellectual Capital to th…
The resonant state at filling factor {\nu} = 1/2 in chiral fermionic ladders
2017
Helical liquids have been experimentally detected in both nanowires and ultracold atomic chains as the result of strong spin-orbit interactions. In both cases the inner degrees of freedom can be considered as an additional space dimension, providing an interpretation of these systems as synthetic ladders, with artificial magnetic fluxes determined by the spin-orbit terms. In this work, we characterize the helical state which appears at filling $\nu=1/2$: this state is generated by a gap arising in the spin sector of the corresponding Luttinger liquid and it can be interpreted as the one-dimensional (1D) limit of a fractional quantum Hall state of bosonic pairs of fermions. We study its main…