Invariance of the Cuntz splice

We show that the Cuntz splice induces stably isomorphic graph $C^*$-algebras.Comment: Our arguments to prove invariance of the Cuntz splice for unital graph C*-algebras in arXiv:1505.06773 applied with only minor changes in the general case. Since most of the results of that preprint have since been superseded by other forthcoming work, we do not intend to publish it, whereas this work is intended for publication. arXiv admin note: substantial text overlap with arXiv:1505.0677

The Good, the Bad, and the Rare: Memory for Partners in Social Interactions

For cooperation to evolve via direct reciprocity, individuals must track their partners' behavior to avoid exploitation. With increasing size of the interaction group, however, memory becomes error prone. To decrease memory effort, people could categorize partners into types, distinguishing cooperators and cheaters. We explored two ways in which people might preferentially track one partner type: remember cheaters or remember the rare type in the population. We assigned participants to one of three interaction groups which differed in the proportion of computer partners' types (defectors rare, equal proportion, or cooperators rare). We extended research on both hypotheses in two ways. First, participants experienced their partners repeatedly by interacting in Prisoner's Dilemma games. Second, we tested categorization of partners as cooperators or defectors in memory tests after a short and long retention interval (10 min and 1 week). Participants remembered rare partner types better than they remembered common ones at both retention intervals. We propose that the flexibility of responding to the environment suggests an ecologically rational memory strategy in social interactions

High-affinity binding and lack of growth-promoting activity of 12(S)-hydroxyeicosatetraenoic acid (12(S)-HETE) in a human epidermal cell line

No abstract availabl

Regional Cardiac Hemodynamics and Oxygenation during Isovolemic Hemodilution in Anesthetized Pigs

Hemodilution causes a drop in hematocrit, thereby lowering the oxygen carrying capacity of blood, necessitating an increase in flow or an augmented oxygen extraction by the tissues to meet their oxygen demands. Under normal conditions the myocardial oxygen extraction is already high and the capacity to increase is limited. In the heart the decrease in arterial oxygen content during hemodilution therefore is mainly compensated by an increase in coronary flow. This increase in flow can be achieved by both reduction of the blood viscosity and coronary vasodilatation. The hemodynamic changes during hemodilution may increase myocardial oxygen consumption and, therefore, an even greater increase in coronary flow might be needed