Seebeck Nanoantennas for Infrared Detection and Energy Harvesting Applications

In this letter we introduce a new type of infrared sensor, based on thermocouple nanoantennas, which enables the energy detection and gathering in the mid-infrared region. The proposed detector combines the Seebeck effect, as a transduction mechanism, with the functionalities of the optical antennas for optical sensing. By using finite-element numerical simulations we evaluate the performance and optical-to-electrical conversion efficiency of the proposed device, unveiling its potential for optical sensing and energy harvesting applications.Comment: 4 pages, 3 figures, Invited paper at EUCAP 201

Magnetic domain wall propagation in a submicron spin-valve stripe: influence of the pinned layer

The propagation of a domain wall in a submicron ferromagnetic spin-valve stripe is investigated using giant magnetoresistance. A notch in the stripe efficiently traps an injected wall stopping the domain propagation. The authors show that the magnetic field at which the wall is depinned displays a stochastic nature. Moreover, the depinning statistics are significantly different for head to head and tail-to-tail domain walls. This is attributed to the dipolar field generated in the vicinity of the notch by the pinned layer of the spin-valve

Novedades corológicas y taxonómicas selectas para el catálogo de la flora vascular del Norte de Marruecos

Para este artículo se han se han selecionado 65 taxones escogidos por su especial interés corológico o taxonómico, fruto de las campañas de prospección florística efectuadas en el norte de Marruecos en los años 2004 y 2005. De ellos 15 representan novedad absoluta para el Catálogo del norte de Marruecos y se confirma la presencia de otros citados bibliográficamente en solo una localidad. Euphorbia exigua subsp. merinoi se indica por vez primera para Andalucía y Chamaesyce serpens (Kunth) Small y Fumana scoparia subsp. paradoxa (Heywood) Güemes son nuevas para Marruecos. Se mencionan por vez primera para el área oriental del territorio a 31 especies. Se describe un nuevo taxón: Sideritis mezgouti Molero & J. M. Montserrat, sp. nova. Se constata de nuevo la importancia de la cuenca alta y media del río Moulouya como vía de penetración del elemento sáharo-arábigo, el más numeroso en estas aportaciones, que alcanza plenamente el extremo suroriental del territorio (Guercif y Beni-Sanssen).This paper lists 65 selected taxa specially chosen for their chorological or taxonomical interest. From these we indicate 15 for the first time for the Checklist of Northern Morocco. Many other species previously cited from one natural area alone, based only on literature references, are confirmed here. Chamaesyce serpens (Kunth) Small and Fumana scoparia subsp. paradoxa (Heywood) Güemes are indicated for the first time for the Moroccan flora and 31 species are indicated as new for the Eastern part of Northern Morocco. Euphorbia exigua subsp. merinoi is mentioned for first time for Andalucía. One new taxon is described: Sideritis mezgouti Molero & J.M. Montserrat, sp. nova. The distribution of the species mentioned here shows that many belong to the Saharo-Arabic element, which represent a remarkable progression of the Saharan floristic element into the low basin of the river Moulouya.Proyecto BIOGEO (REN 2002-04478-CO3-03/GLO)GReB (2001SGR00125

360 degree domain wall generation in the soft layer of magnetic tunnel junctions

High spatial resolution X-ray photo-emission electron microscopy technique has been used to study the influence of the dipolar coupling taking place between the NiFe and the Co ferromagnetic electrodes of micron sized, elliptical shaped magnetic tunnel junctions. The chemical selectivity of this technique allows to observe independently the magnetic domain structure in each ferromagnetic electrode. The combination of this powerful imaging technique with micromagnetic simulations allows to evidence that a 360 degree domain wall can be stabilized in the NiFe soft layer. In this letter, we discuss the origin and the formation conditions of those 360 degree domain walls evidenced experimentally and numerically

The Role of Identity in Acculturation among Immigrant People: Theoretical Propositions, Empirical Questions, and Applied Recommendations

The present paper advances theoretical propositions regarding the relationship between acculturation and identity. The most central thesis argued is that acculturation represents changes in cultural identity and that personal identity has the potential to ‘anchor’ immigrant people during their transition to a new society. The article emphasizes the experiences of nonwhite, non-Western immigrant people moving to Western nations. The article also calls for research on heretofore unexplored aspects of the relationship of acculturation to personal and social identity. Ideas are proposed for interventions to promote cultural identity change and personal identity coherence

The Role of Identity in Acculturation among Immigrant People: Theoretical Propositions, Empirical Questions, and Applied Recommendations

The present paper advances theoretical propositions regarding the relationship between acculturation and identity. The most central thesis argued is that acculturation represents changes in cultural identity and that personal identity has the potential to ‘anchor’ immigrant people during their transition to a new society. The article emphasizes the experiences of nonwhite, non-Western immigrant people moving to Western nations. The article also calls for research on heretofore unexplored aspects of the relationship of acculturation to personal and social identity. Ideas are proposed for interventions to promote cultural identity change and personal identity coherence

Toward an Interdisciplinary Study of Acculturation, Identity, and Culture

As both Côté and Hand point out in their commentaries, acculturation, identity, and culture are complex processes that are determined and affected by the con-texts in which they operate. As we stated in our article in this issue, we do not dismiss the notion that culture and identity are complex and individualized phenomena that vary from one person or context to the next. However, our goal is pragmatic in that we wish to operationalize acculturation, identity, and culture for empirical research that can then be used to design and support intervention efforts. To design interventions that consist of core components but can be adapted for specific immigrant groups and receiving societies, we believe that it is necessary to develop ‘quasi-uni-versal’ principles about what personal, social, and cultural identity are and how they operate and are affected by the experience and process of international migration