This paper studies the effects of partner selection on cooperation in an artificial ecol ogy. Agents, represented by finite automata, interact with each other through an iterated prisoner's dilemma (IPD) game with the added feature th-at players choose and refuse potential game partners on the basis of continually updated expected payoffs. Analytical studies reveal that the subtle interplay bet...

Partner selection is an important process in many social interactions, permitting individuals to decrease the risks associated with cooperation. In large populations, defectors may escape punishment by roving from partner to partner, but defectors in smaller populations risk social isolation. We investigate these possibilities for an evolutionary Prisoner's Dilemma in which agents use expected ...

Knowing who people are, where they are, what they are doing, and how they interact with other people and things is valuable from commercial, security, and space utilization perspectives. Video sensors backed by computer vision algorithms are a natural way to gather this data. Unfortunately, key technical issues persist in extracting features and models that are simultaneously efficient to compu...

Just as Cinderella was the ignored sister with great potential, so service sector FDI may be the neglected sibling of trade policy. As trade and FDI regimes have become more liberalized in recent decades, tariff reductions and FDI in manufacturing have hogged the limelight, while FDI in services has often remained a wallflower. In fact, most restrictions on FDI flows today are in the service se...

In this issue of Canadian Family Physician (CFP) we celebrate the growth and diversity of family medicine research in Canada. In the past 2 decades, Canada’s family medicine research enterprise has grown remarkably. Many academic family medicine departments across the country have developed strong core groups of funded family-physician and allied-health researchers with stable infrastructure an...

(2817) Erysimum violascens Popov in Byull. Sredne-Aziatsk. Gosud. Univ. 9, Suppl.: 24. 1925 [Angiosp.: Cruc.], nom. cons. prop. Typus: [Tajikistan:] “Prov. Samarkand, distr. Chodshent. Montes Mogol-Tau. Ad declivia saxosa valle Utsch-Bach”, 6 Mai 1924, et Vvedensky [Herb. Fl. As. Med., exs. No. 91] (TASH 9422; isotypi: B barcodes 10 0263584 & 0263585, BP, BR, BRNU 131332, C, E barcode E00231860...