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...

This case study is applying imaging and analytical techniques from multiple scientific disciplines to digitise coins and evaluate 3D multi-modal visualisation. Two ancient Roman silver denarii were selected as test objects to establish whether the proposed digital recording methods can support professional numismatic comparison of features and properties. The coins raise questions concerning th...

Cosmic internal symmetry (COINS) relates vacuum (V), dark (D) matter, baryons (B) and radiation (R). It implies conservation of the Friedmann integral A which is numerically the same for each of the energies: A ∼ AV ∼ AD ∼ AB ∼ AR. Evidence for COINS comes from the concordance data, including the WMAP data which also indicate that the co-moving space has a finite size. COINS 1) links the value ...

Given a set of m coins out of a collection of coins of k unknown distinct weights, we wish to decide if all the m given coins have the same weight or not using the minimum possible number of weighings in a regular balance beam. Let m(n, k) denote the maximum possible number of coins for which the above problem can be solved in n weighings. We show that m(n, 2) = n 1 2 , whereas for all 3 ≤ k ≤ ...

Off-line e-cash systems are the digital analogue of regular cash. One of the main desirable properties is anonymity: spending a coin should not reveal the identity of the spender and, at the same time, users should not be able to double-spend coins without being detected. Compact e-cash systems make it possible to store a wallet of O(2) coins using O(L+ λ) bits, where λ is the security paramete...

Cryptographic e-cash allows off-line electronic transactions between a bank, users and merchants in a secure and anonymous fashion. A plethora of e-cash constructions has been proposed in the literature; however, these traditional e-cash schemes only allow coins to be transferred once between users and merchants. Ideally, we would like users to be able to transfer coins between each other multi...