Simultaneously recorded standard electrocardiograms (ECG) and Frank vectorcardiograms (VCG) were correlated with the coronary arteriograms and the left ventiiculograms of 210 patients. Quantitative criteria were applied to ECG measurements made by manual technics and to VCG measurements obtained by computer technics. As the extent of significant arteriographic disease increased, the frequency o...

This paper analyzes ex post equilibria in the VCG combinatorial auctions. If Σ is a family of bundles of goods, the organizer may restrict the bundles on which the participants submit bids, and the bundles allocated to them, to be in Σ . The Σ-VCG combinatorial auctions obtained in this way are known to be truth-telling mechanisms. In contrast, this paper deals with non-restricted VCG auctions,...

One hundred patients with suspected coronary heart disease were studied by vectorcardiography (VCG), electrocardiography (ECG), and coronary arteriography. Twenty-eight patients had VCG evidence of anterior infarction; 26 of this group had severe narrowing or obstruction of the left anterior descending branch. Five did not have anterior infarction by ECG. Twenty-seven patients had VCG evidence ...

Electronic markets are based on classic market design assumptions that often do not hold. This thesis examines the conflict between theory and practice for the class of Vickrey-Clarke-Groves mechanisms (VCG) and the auctions it has inspired in electronic commerce, most notably the iterative auctions found on eBay. VCG mechanisms provide bidders with an optimal strategy to truthfully reveal thei...

Relationship has been established between epicardial ST-segment elevation, considered a reliable estimate of ischemic injury in experimental myocardial damage, and ST changes by multiple-lead precordial electrocardiography. However, 35-lead precordial mapping is time-consuming and suitable only for anterior infarctions. An alternate, more rapid method for recording ST segments is an external 3-...

Genetic exchange by asexual filamentous fungi is presumed to be limited to isolates in the same vegetative compatibility group (VCG). To evaluate genetic isolation of Aspergillus flavus due to vegetative incompatibility, three gene regions were chosen that contained closely spaced nucleotides that were polymorphic among some of the six VCGs examined. A member of each VCG was collected from five...

There are two dominant approaches for the construction of automatic program verifiers, Verification Condition Generation (VCG) and Symbolic Execution (SE). Both techniques have been used to develop powerful program verifiers. However, to the best of our knowledge, no systematic experiment has been conducted to compare them. This paper reports on such an experiment. We have used the specificatio...

In private values settings, the Vickrey-Clarke-Groves (VCG) mechanism leads to efficient auction outcomes, while the theoretical properties of the Simultaneous Ascending (SA) auction are not well understood. This leads us to compare the properties of an SA and a VCG auction in an experimental setting with private values for multiple objects having complementarities. Statistically, we find littl...

Cardiac syndrome X (CSX) is a clinical condition, characterized by angina, positive stress test and negative coronary angiography. Myocardial ischemia is suggested to influence the ischemic changes in the electrocardiogram (ECG), observed during stress test. The aim of this study, is to obtain CSX patterns of the high-resolution vectorcardiographic (VCG) loops in the horizontal (H), frontal (F)...