Search results for "AMP"

Campi di forza. Percorsi confinati di migranti in Europa

2009

È impossibile comprendere la specificità delle attuali politiche europee di controllo delle migrazioni, senza confrontarsi con il grande tema dei luoghi di confinamento, in cui centinaia di migliaia di persone vengono oggi costrette semplicemente perché sprovviste di un regolare documento di soggiorno. Che si tratti di centri di detenzione istituzionali e militarizzati o di zone di concentramento informali, oppure nate spontaneamente, i luoghi qui analizzati sono tutti espressione del medesimo tentativo di governo della mobilità dei migranti, che ormai da diversi anni l’Unione europea sta praticando. Le radici dell’attuale sistema europeo di separazione di alcuni “corpi” dal resto della pop…

Single Event Transients and Pulse Quenching Effects in Bandgap Reference Topologies for Space Applications

2016

An architectural performance comparison of bandgap voltage reference variants, designed in a $0.18~\mu \text {m}$ CMOS process, is performed with respect to single event transients. These are commonly induced in microelectronics in the space radiation environment. Heavy ion tests (Silicon, Krypton, Xenon) are used to explore the analog single-event transients and have revealed pulse quenching mechanisms in analogue circuits. The different topologies are compared, in terms of cross-section, pulse duration and pulse amplitude. The measured results, and the explanations behind the findings, reveal important guidelines for designing analog integrated circuits, which are intended for space appli…

Differentiation among dairy products by combination of fast field cycling NMR relaxometry data and chemometrics

2021

A set of commercial milk and Sicilian cheeses was analysed by a combination of fast field cycling (FFC) nuclear magnetic resonance (NMR) relaxometry and chemometrics. The NMR dispersion (NMRD) curves were successfully analysed with a mathematical model applied on Parmigiano-Reggiano (PR) cheese. Regression parameters were led back to the molecular components of cheeses (water trapped in casein micelles, proteins and fats) and milk samples (water belonging to hydration shells around dispersed colloidal particles of different sizes and bulk water). The application of chemometric analysis on relaxometric data enabled differentiating milk from cheeses and revealing differences within the two sa…

A new approach to calibrate the thermal conditions in space charge measurements on HVDC mini-cables

2019

The PEA method is currently widespread used for space charge measurements in mini-cables in order to qualify the behavior of semicon-dielectric-semicon compound under electric and thermal stress. The main goal of this research is to quantitatively evaluate the relationship between the thermal boundary conditions applied to cables or mini-cables and the maximum local electric field due to the accumulated space charge. Hitherto, several research groups have obtained thermal gradients over the dielectric's radius heating the conductor by Joule effect due to an induced current. In this paper, a numerical approach is offered to calibrate the heat exchange boundary conditions to apply to a sample…

Epistemic uses of the pretérito pluscuamperfecto in La Paz Spanish

2020

This paper explores epistemic-evidential uses of the pluperfect, i.e. pretérito pluscuamperfecto, in La Paz Spanish. The pretérito pluscuamperfecto displays functions of a reported evidential form, conforming to results from previous studies on Argentinian Spanish (Bermúdez 2008; Speranza 2014) and, furthermore, is used according to a previously unnoticed inferential evidential function. Using theoretical frameworks from Kockelman (1957) and Bergqvist (2018), this paper describes the configuration of participant roles and event types implied in the different evidential functions of the pretérito pluscuamperfecto.

Caratterizzazione del campo di induzione magnetica prodotto da cabine secondarie

2014

L’articolo presenta una metodologia per la caratterizzazione del campo di induzione magnetica nei pressi di cabine secondarie di tipo a box prefabbricato in cemento armato vibrato, che costituisce un valido strumento per la verifica del rispetto degli obiettivi di qualità imposti dalla legislazione vigente.

Riferibilità dei contatori statici di energia reattiva in presenza di armoniche

2014

Avaliando o caso da dengue na Argentina em 2009: discriminação e medo

2010

Após quase uma década, a reaparição da Dengue na Argentina causou pânico e medo. Diferente da Bolívia, do Brasil e do Paraguai, onde as políticas de prevenção têm sido seguidas, o futuro da dengue fica incerto para a Argentina; este trabalho não tem qualquer afiliação política, mas destaca o papel da mídia de massa na cobertura das epidemias. A questão de se um jornal ou corporação de mídia de massa deveria manter um mínimo de objetividade é extensa demais para ser resolvida neste artigo curto. Entretanto, temos apresentado um modelo que ajudará outros pesquisadores a interpretarem temas desta natureza no futuro. Nos momentos de desordem, incerteza ou desastre, as sociedades passam por uma …

Mitochondrial function and sirtuin expression in hippocampus of young and old high- and low-capacity runner rats

2016

Introduction: Exercise and aerobic capacity are associated with improved learning in animals and humans. The hippocampus is a brain structure involved in learning and memory. High rates of neurogenesis have been shown to take place in the dental gyrus of hippocampus in response to physical exercise. It is not known whether mitochondrial dysfunction in the hippocampus is responsible for decline in cognitive function associated with low fitness level and aging, and whether intrinsic aerobic capacity is a risk factor for it. Methods: Mitochondrial function was investigated in the hippocampi of young and old highcapacity runner (HCR) and low-capacity runner (LCR) rats using high-performance res…

Mitochondrial cannabinoid receptors gate corticosterone impact on novel object recognition

2023

: Corticosteroid-mediated stress responses require the activation of complex brain circuits involving mitochondrial activity, but the underlying cellular and molecular mechanisms are scantly known. The endocannabinoid system is implicated in stress coping, and it can directly regulate brain mitochondrial functions via type 1 cannabinoid (CB1) receptors associated with mitochondrial membranes (mtCB1). In this study, we show that the impairing effect of corticosterone in the novel object recognition (NOR) task in mice requires mtCB1 receptors and the regulation of mitochondrial calcium levels in neurons. Different brain circuits are modulated by this mechanism to mediate the impact of cortico…