We study a special form of securities market circuit breaker, i.e., European volatility interruptions. Instead of halt trading like traditional circuit breaker, these short-living call auctions allow for continual price discovery after price limit hits. Based upon approximately 1,800 Xetra volatility interruption events from 01/2009 to 01/2012, we empirically assess whether such auctions contri...

We show that evolution in a population of adaptive agents, repeatedly competing for a limited resource, can come to an abrupt halt. This transition from evolutionary to non-evolutionary behavior arises as the global resource level is changed, and is reminiscent of a phase transition to a frozen state. Its origin lies in the inductive decision-making of the agents, the limited global information...

Until the end of the last century, no intervention could alter the natural history of the disease. Only in the last few decades, the retina specialists began to intervene in order to minimize the visual loss in those patients. Last ten years have been especially exciting as the new treatment modalities emerged and for the first time we could not only halt the progression of the deterioration, b...

What is academic freedom, what guarantees it, and what would you do if your university violated yours? Few of us academics entertain these questions or ponder possible answers. This leaves us individually and collectively vulnerable to encroachments on our right to free and open inquiry. I use a case study from 1989–1994 to illustrate how violations of academic freedom develop, the typical pret...

The orbital parameters of the observed extrasolar planets differ strongly from those of our own solar system. The differences include planets with high masses, small semi-major axis and large eccentricities. We performed numerical computations of embedded planets in disks and follow their mass growth and orbital evolution over several thousand periods. We find that planets do migrate inwards on...

Various attempts have been made to explain the sources of long-term discriminatory activity – behavior which does not seem to be profit-maximizing, and yet persists in the face of market competition. Research interest has focused on the effect of Title VII of the Civil Rights Act, and whether it has served to decrease employment discrimination or merely exposed firms to costly litigation. Follo...

The resources required to halt biodiversity declines are estimated to be many times more than current investment, underpinning calls to increase financial support for conservation, and to develop methods for allocating funds more efficiently (McCarthy et al., 2012; McDonald et al., 2015). Conservation triage is an important part of the latter strategy, with proponents arguing that by explicitly...

We performed a qualitative study (n=39) mapping the health information needs of stakeholders involved with malaria prevention and treatment in rural Ghana as part of a larger effort to develop integrated, scalable eHealth tools. Initial results can be categorized into four areas: health care delivery, data quality, technical problems and workforce‐related problems. This comprehensive review of ...

In the article, we focus on the question of sustainability in the renewable energy sector of Romania. The aim of the current paper is to analyze the financial performance of the companies operating in the field. Our assumption is that the success of the implementation of the energy switch from classic to renewables relies on the businesses operating in this industry. In our article, we have sel...

Recently, a new self-learning worm propagation strategy was introduced in [4, 2], which we refer to as the importance scanning method. Under the importance scanning approach, a worm employs an address sampling scheme to search for the underlying group distribution of (vulnerable) hosts in the address space through which it propagates. The worm exploits this information to increase the rate at w...