Social housing in Spain has its origin the first Cheap Houses Law that was promulgated 1911, trying to provide a solution need for working class who flocked cities waves of migration from rural areas. Since then, legislative initiatives have been taking place mitigate problem. Each one them contributing elements presumably contributed hygiene and habitability house without forgetting economic c...

A durable purchased at time t 2 [0;1) provides a constant service ‡ow x0 in the interval [t; t + 1]. The price of the durable is reduced periodically: it is equal to p = p0=(1 + ) in the period of time [ ; + 1), 2 N, where 0. Assume that the interest rate equal to the rate of time preference: r = . Consider a consumer that at date t = 0 has no durable and a lifetime wealth w. His optimization p...

Oftentimes, topics that might fall outside of science’s remit seem to end up becoming a part of it, sooner or later. This appears to be the case of synthetic biology, a new biological science (although some maintain that it is a form of engineering, or treat it as such; Endy, 2005), which seems to have become essential to the understanding of living beings and their extreme manipulation. I beli...

s early as in 1867, Cohnheim (1) noted that “all cells come rom the bloodstream and therefore, in light of subsequent bservations, from the bone marrow.” The identification of ndothelial progenitor cells (EPCs), extracted from human eripheral blood in 1997 by Asahara et al. (2), and subseuent studies have led to a significant paradigm shift in the eld of vascular biology. The concept of arteria...

Reliable multicast protocols can strongly simplify the design of distributed applications. However, it is hard to sustain a high multicast throughput when groups are large and heterogeneous. In an attempt to overcome this limitation, previous work has focused on weakening reliability properties. In this paper we introduce a novel reliability model that exploits semantic knowledge to decide in w...

Semantic Reliability is a novel correctness criterion for multicast protocols based on the concept of message obsolescence: A message becomes obsolete when its content or purpose is superseded by a subsequent message. By exploiting obsolescence, a reliable multicast protocol may drop irrelevant messages to find additional buffer space for new messages. This makes the multicast protocol more res...

This study proposes that IT professionals’ behavioral orientation towards IT knowledge and skills updating demands can take on two contrasting forms: updating-as-play or updating-as-work. Drawing on threat-rigidity theory (Staw, Sandelands, & Dutton, 1981), the authors hypothesize that IT professionals who feel threatened by professional obsolescence are more likely to approach updating-as-work...

Technological change is examined in a model of capital production to show that “creative destruction” can occur as an outcome of firm’s optimizing behavior. Capital systems are made up of components that are necessary for them to operate and that have uncertainty with respect to durability. For each type of technological change agents make a corresponding decision about whether to continue to u...