Does using our hands help us to add the value of a set of coins? We test the benefits and costs of direct interaction with a mental arithmetic task in a computerized yoked design in which groups of participants vary in their interactive mode (move vs. look) and the initial configuration of coins (pseudo-random vs. another mover’s final layout). By assessing performance and conducting a microgen...

Numismatics deals with various historical aspects of the phenomenon Money. Computer vision explores the theory and technology to obtain and interpret information from images. Nowadays, numismatics is at a point where it can benefit greatly from the application of computer vision methods, and in turn provides a large number of new, challenging and interesting conceptual problems and data for com...

Money, when used as an incentive, activates the same neural circuits as rewards associated with physiological needs. However, unlike physiological rewards, monetary stimuli are cultural artifacts: how are monetary stimuli identified in the first place? How and when does the brain identify a valid coin, i.e. a disc of metal that is, by social agreement, endowed with monetary properties? We took ...

CONTEXT Children frequently ingest coins. When lodged in the esophagus, the coin may cause complications and must either be removed or observed to pass spontaneously. OBJECTIVES (1) To compare relatively immediate endoscopic removal to a period of observation followed by removal when necessary and (2) to evaluate the relationship between select clinical features and spontaneous passage. DES...

This paper investigates the role of interaction and coins in public-coin quantum interactive proof systems (also called quantum Arthur-Merlin games). While prior works focused on classical public coins even in the quantum setting, the present work introduces a generalized version of quantum Arthur-Merlin games where the public coins can be quantum as well: the verifier can send not only random ...

Two naturalistic experiments are reported exploring the impact of parental restriction on children's diets. For study 1, 53 parents gave 75 g of chocolate coins to their child over a weekend. For study 2, 86 parents were recruited prior to the 2 week Easter break when their children would be receiving chocolate Easter eggs. For both studies, parents were randomly allocated to either the non-res...

We present a computer vision application that detects all coins in a test image, classifies each detected coin and computes the total amount. Coins to be counted are assumed to be lying on a flat surface. The application starts by estimating the extrinsic parameters of the input camera relative to this flat surface ([R | t]), whose intrinsic parameters (K) are assumed to be known beforehand. Th...

BACKGROUND The current article explores the effect of design on the efficacy of behavioural intervention technologies (BITs). With a user-centred design process, colourful key ring coins were created as a means of introducing self-administered behavioural interventions. METHODS A 6-week study tested whether the tangible objects contributed to the effectiveness of these interventions. Three gr...

OBJECTIVE The objective of this study was to describe our experience removing esophageal coins from children in a tertiary care pediatric emergency department over a 4-year period. METHODS We retrospectively reviewed a continuous quality improvement data set spanning October 1, 2004, through September 30, 2008. RESULTS In 96 of 101 cases (95%), emergency physicians successfully retrieved th...

BACKGROUND Foreign body ingestion continues to be a common problem that contributes significantly to high morbidity and mortality worldwide. Coins are the most common foreign body lodged in the oesophagus. This study was conducted to describe our experience of removal of coins from oesophagus with Foley catheter under ketamine effect. METHODS This was a retrospective study conducted at Distri...