Quasiparticle cooling of a single-Cooper-pair-transistor

A superconducting tunnel junction is used to directly extract quasiparticles from one of the leads of a single-Cooper-pair-transistor. The consequent reduction in quasiparticle density causes a lower rate of quasiparticle tunneling onto the device. This rate is directly measured by radio-frequency reflectometry. Local cooling may be of direct benefit in reducing the effect of quasiparticles on coherent superconducting nanostructures.Comment: 4 figure

Animating complex concepts

Techniques in computer-aided learning offer significant benefits for explaining difficult concepts in a way that is both stimulating and efficient. In the context of the STORM system, we have employed computer-based animation as a means of elucidating complex concepts in the educational domain of Internet and communications technology. Our experience reveals two important lessons for the application of computer animated instruction. Firstly, there is an essential requirement in the design process to ensure that the ontology and manner of presentation accurately conveys the intended message, whilst avoiding ambiguity and false or 'hidden' information. This focuses upon concise and disambiguated animations. Secondly, this requirement is best achieved through an iterative group-based development cycle of specification, testing and implementation

Computer program for optical systems ray tracing

Program traces rays of light through optical systems consisting of up to 65 different optical surfaces and computes the aberrations. For design purposes, paraxial tracings with astigmation and third order tracings are provided

Examining the cognitive costs of counterfactual language comprehension: Evidence from ERPs

Recent empirical research suggests that understanding a counterfactual event (e.g. ‘If Josie had revised, she would have passed her exams’) activates mental representations of both the factual and counterfactual versions of events. However, it remains unclear when readers switch between these models during comprehension, and whether representing multiple ‘worlds’ is cognitively effortful. This paper reports two ERP studies where participants read contexts that set up a factual or counterfactual scenario, followed by a second sentence describing a consequence of this event. Critically, this sentence included a noun that was either consistent or inconsistent with the preceding context, and either included a modal verb to indicate reference to the counterfactual-world or not (thus referring to the factual-world). Experiment 2 used adapted versions of the materials used in Experiment 1 to examine the degree to which representing multiple versions of a counterfactual situation makes heavy demands on cognitive resources by measuring individuals’ working memory capacity. Results showed that when reference to the counterfactual-world was maintained by the ongoing discourse, readers correctly interpreted events according to the counterfactual-world (i.e. showed larger N400 for inconsistent than consistent words). In contrast, when cues referred back to the factual-world, readers showed no difference between consistent and inconsistent critical words, suggesting that they simultaneously compared information against both possible worlds. These results support previous dual-representation accounts for counterfactuals, and provide new evidence that linguistic cues can guide the reader in selecting which world model to evaluate incoming information against. Crucially, we reveal evidence that maintaining and updating a hypothetical model over time relies upon the availability of cognitive resources

Lessons from digital puppetry - Updating a design framework for a perceptual user interface

While digital puppeteering is largely used just to augment full body motion capture in digital production, its technology and traditional concepts could inform a more naturalized multi-modal human computer interaction than is currently used with the new perceptual systems such as Kinect. Emerging immersive social media networks with their fully live virtual or augmented environments and largely inexperienced users would benefit the most from this strategy. This paper intends to define digital puppeteering as it is currently understood, and summarize its broad shortcomings based on expert evaluation. Based on this evaluation it will suggest updates and experiments using current perceptual technology and concepts in cognitive processing for existing human computer interaction taxonomy. This updated framework may be more intuitive and suitable in developing extensions to an emerging perceptual user interface for the general public

Implications of globalisation for financial stability.

Asia’s share of world trade has expanded constantly over the last two decades. This increase reflects, inter alia, the considerable strengthening of trade links between the countries of the region, fostered by the vertical specialisation of the Asian economies. In the 1980s, the most advanced economies in the region, e.g. Japan, relocated the most labour-intensive stages of their production processes to the newly-industrialised Asian economies like South Korea and Singapore and then, in the 1990s, to emerging Asia, i.e. Indonesia, Malaysia, the Philippines and Thailand. The emergence of China has also given signifi cant impetus to regional trade integration. Surging intra-regional direct investment fl ows have accompanied and shored up trade fl ows, however, portfolio investment fl ows and cross-border bank loans have remained limited. Given that production processes within the region are complementary and that the final destination for exports is outside the region, the lack of a regional exchange rate arrangement in Asia does not appear to be a concern in the short term. Indeed, the regional integration initiatives adopted in Asia in the aftermath of the 1997-1998 financial crisis aim to build further resilience to fi nancial market turbulence. Firstly, deeper and more liquid local bond markets should make it possible to reduce the double financial mismatch, i.e. the currency mismatch and maturity mismatch, which largely sustained the crisis. In this regard, the ASEAN+3 Asian Bond Market Initiative examines the supply-side issues while the Asian Bond Funds initiative of the Executives’ Meeting of East Asia-Pacifi c Central Banks (EMEAP) deals with demand-side issues via the pooling of resources to buy bonds issued by member countries. Secondly, the Chiang Mai Initiative, which consists in a network of currency swap arrangements between the central banks of the ASEAN+3 member states, provides these countries with a regional fi nancial assistance mechanism in the event of a liquidity crisis. The Asian vertical model of production appears to have reached its limit and is evolving towards a more “horizontal” model in terms of both production (substitutability of production processes as a result of the shift towards higher value-added activities) and consumption (expansion of the regional market linked to the growth potential of domestic Chinese demand). Regional monetary co-operation could therefore aim in the future at curbing intra-regional exchange rate fl uctuations in order to promote trade and investment within the region.