Search results for "switching."

Noise Induced Phenomena in point Josephson junctions

2008

We present the analysis of the mean switching time and its standard deviation of short overdamped Josephson junctions, driven by a direct current and a periodic signal. The effect of noise enhanced stability is investigated. It is shown that fluctuations may both decrease and increase the switching time.

INFLUENCE OF LENGTH ON THE NOISE DELAYED SWITCHING OF LONG JOSEPHSON JUNCTIONS

2008

The transient dynamics of long overlap Josephson junctions in the frame of the sine-Gordon model with a white noise source is investigated. The effect of noise delayed decay is observed for the case of overdamped sine-Gordon equation. It is shown that this noise induced effect, in the range of small noise intensities, vanishes for junctions lengths greater than several Josephson penetration length.

Stabilization Effects of Dichotomous Noise on the Lifetime of theSuperconducting State in a Long Josephson Junction

2015

We investigate the superconducting lifetime of a long overdamped current-biased Josephson junction, in the presence of telegraph noise sources. The analysis is performed by randomly choosing the initial condition for the noise source. However, in order to investigate how the initial value of the dichotomous noise affects the phase dynamics, we extend our analysis using two different fixed initial values for the source of random fluctuations. In our study, the phase dynamics of the Josephson junction is analyzed as a function of the noise signal intensity, for different values of the parameters of the system and external driving currents. We find that the mean lifetime of the superconductive…

Phase dynamics in graphene-based Josephson junctions in the presence of thermal and correlated fluctuations

2014

In this work we study by numerical methods the phase dynamics in ballistic graphene-based short Josephson junctions. The supercurrent through a graphene junction shows a non-sinusoidal phase-dependence, unlike a conventional junction ruled by the well-known d.c. Josephson relation. A superconductor-graphene-superconductor system exhibits superconductive quantum metastable states similar to those present in normal current-biased JJs. We explore the effects of thermal and correlated fluctuations on the escape time from these metastable states, when the system is stimulated by an oscillating bias current. As a first step, the analysis is carried out in the presence of an external Gaussian whit…

DEVELOPMENT OF LIQUID CRYSTAL LAYER THICKNESS AND REFRACTIVE INDEX MEASUREMENT METHODS FOR SCATTERING TYPE LIQUID CRYSTAL DISPLAYS

2022

The research has been supported by ERDF No.1.1.1.1/19/A/120 “Improvement of Electro-Optical Characteristics of Liquid Crystal Shutters”.

Resistive switching behaviour in ZnO and VO 2 memristors grown by pulsed laser deposition

2014

The resistive switching behaviour observed in microscale memristors based on laser ablated ZnO and VO 2 is reported. A comparison between the two materials is reported against an active device size. The results show that devices up to 300 × 300 μm 2 exhibit a memristive behaviour regardless of the device size, and 100 × 100 μm 2 ZnO-based memristors have the best resistance off/on ratio.

Functional Definition of a B Cell Epitope, KGEQGEPGA, on C1q the Fc-Binding Subunit of the First Component of Complement

1999

A synthetic peptide representing the C1q epitope KGEQGEPGA has been shown to suppress or delay the onset of CII-induced arthritis when applied intravenously (i.v.) prior to an intradermal (i.d.) challenge, in a mouse model; the phenomenon being associated with the development of immunoglobulin (Ig)M antibodies specific for the KGEQGEPGA epitope. Here we show that this amino acid sequence provides an immunodominant B cell epitope that is recognised by autoantibodies present in the sera of patients with chronic inflammatory diseases such as systemic lupus erythematosus (SLE) and rheumatoid arthritis, two diseases associated with an immune response to C1q. The peptide's ability to produce pept…

Bilingual practices and the social organisation of video gaming activities

2010

Abstract Grounded in the interactional paradigm for the study of bilingual language use, this paper investigates how players engaged in a collaborative game-playing activity orient to the co-presence of two languages in the setting and deploy bilingual resources in organising their action and participation. The analysis aims to demonstrate how a particular kind of ‘bilingual order’ ( Cromdal, 2005 ) is co-constructed in which the players use their native language (Finnish) for interaction with each other, but systematically draw on the language of the game in constructing their turns as recognisable and building their alignments with respect to activities under way. The analysis highlights …

REVIEWS - Barbara E. Bullock & Almeida Jacqueline Toribio (eds.), The Cambridge handbook of linguistic code-switching (Cambridge Handbooks in Lin…

2010

Speaking English in Finnish content-based classrooms

2007

:  CLIL (Content and Language Integrated Learning) is a term widely used in Europe to refer to different forms of content based education, often conducted in English. Earlier research on CLIL has tended to focus on matters of language learning or content mastery rather than on details of classroom interaction. This paper investigates how English is used in Finnish biology and physics CLIL classrooms. Classrooms are approached from a discourse-pragmatic perspective which involves close attention to social and interpersonal aspects of language use as it unfolds in authentic settings. The findings suggest that CLIL students claim ownership of English by the way they confidently use it as a res…