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Yayın Testing a hypothesis for the evolution of sex(World Scientific Publishing Company, 2000-07-11) Örçal, Bora; Tüzel, Erkan; Sevim, Volkan; Jan, Naeem; Erzan, AyşeAn asexual set of primitive bacteria is simulated with a lit-string Penna model with a Fermi function for survival. A recent hypothesis by Jan, Stauffer, and Moseley on the evolution of sex from asexual cells as a strategy for trying to escape the effects of deleterious mutations is checked. This strategy is found to provide a successful scenario for the evolution of a stable macroscopic sexual population.Yayın Investigation of beachrock using microanalyses and OSL dating: a case study from Bozcaada island, Turkey(Coastal Education & Research Foundation, 2010-03) Erginal, Ahmet Evren; Güneç Kıyak, Nafiye; Öztürk, BeyhanWe investigated the origin and absolute age of beachrock samples on Bozcaada Island, located on the northern Aegean Sea coast of Turkey, using energy dispersive X-ray spectroscopy (EDX) and scanning electron microscopy (SEM) analyses and optically stimulated luminescence (OSL) dating. Various types of cements were identified, such as micritic, meniscus, and biologic cements, revealing that the beachrock could have occurred as a result of the combined effects of marine-phreatic and supratidal cementation conditions. Optical dating results showed that the formation of beachrock ranged in age from 5.41 +/- 0.58 ka BP to 0.33 +/- 0.05 ka BP. However, much of the beachrock body (about 3 m in thickness) is drowned or submerged today, suggesting that submerged beachrocks extending to -5 m date to earlier times than the start of the cementation period discussed herein.Yayın Free software, business capital, and institutional change: a veblenian analysis of the software industry(M. E. Sharpe Inc, 2012-12) Koloğlugil, Serhat; Koloğlugil, SerhatFree software, unlike proprietary software under exclusive copyright control, exemplifies a form of productive and innovative activity that is based upon mutual sharing of technological knowledge. Free software engineers, who get connected through various software-development projects, voluntarily contribute their time and skills to produce computer programs which, they insist, should be free for anyone to use, modify, and distribute. This paper argues that Thorstein Veblen's socio-economic theory - in particular his conceptions of capital, technological knowledge and institutional change - offers a fruitful framework to analyze the emergence of free software as an economic and social phenomenon. From the Veblenian perspective, the free software movement argues that the technological knowledge in the software industry should freely be available to society as a part of its common stock of knowledge. In other words, they are against the use of copyright law as a predatory strategy by software corporations, while the current technological conditions in the software industry allow for an institutional arrangement of production and innovation based on cooperative habits of thought.
