Magnetically controlled current flow in coupled-dot arrays

Quantum transport through an open periodic array of up to five dots is investigated in the presence of a magnetic field. The device spectrum exhibits clear features of the band structure of the corresponding one-dimensional artificial crystal which evolves with varying field. A significant magnetically controlled current flow is induced with changes up to many orders of magnitude depending on temperature and material parameters. Our results put forward a simple design for measuring with current technology the magnetic subband formation of quasi one-dimensional Bloch electrons.Comment: 9 pages, 5 figure

When a risky prospect is valued more than its best possible outcome

In this paper, we document a violation of normative and descriptive models of decision making under risk. In contrast to uncertainty effects found by Gneezy, List and Wu (2006), some subjects in our experiments valued certain lotteries more than the best possible outcome. We show that the likelihood of observing this effect is positively related to the probability of winning the lottery and negatively related to the value of the maximum outcome. We also demonstrate that this effect can be partially attributed to subjects’ competitiveness and level of comprehension of the lottery mechanism; the competitiveness effects far outweighing comprehension effects.lottery, risk, competitiveness, Vickrey auctions

Management of a Solitary Bone Metastasis to the Tibia from Colorectal Cancer

The onset of osseous metastases during the course of colorectal cancer is not common. When they appear they are usually combined with visceral metastases to the liver, lungs and brain. In our report we refer to the case of a 78-year-old patient who presented a solitary bone metastasis from rectal carcinoma in the middle of his right tibia. A year before he had been operated for a Dukes stage B1 adenocarcinoma of the rectum. The rest of the check was negative for other metastases. He received external radiotherapy and capecitabine with bisphosphonates as palliative treatment. 19 months after the original diagnosis of bone metastasis the patient has stable disease

Using damage mechanics to model a four story RC framed structure submitted to earthquake loading

A simplified model is proposed to simulate the nonlinear behavior of a four-story full-scalereinforced concrete framed structure subjected to severe dynamic loading. The structure has been testedpseudodynamically in the European Laboratory for Structural Assessment (ELSA) at the Joint ResearchCenter of the European Commission. The proposed model uses 2D multi layered Bernoulli beam elementsand uniaxial constitutive laws based on damage mechanics and plasticity. Comparison with theexperimental results shows the efficiency of the approach

Network configuration as a measure of power in global production networks

Power is one of the key components in understanding and analyzing global production and is central to the analytical frameworks of both GVCs and GPNs. By focusing on firms’ power within GPNs, we are able to draw a novel analytical link between the governance structures of GVCs and network configuration presented in recent versions of GPNs. Using global input- output data, we show that the network structure of global production helps determine the distribution of power among firms in different economic sectors and, consequently, it influences the governance structures of supply networks. More specifically, we find a very high correlation between the distribution of profits and a sector’s position in global production, captured by its (total strength) centrality. Based on this, we are able to provide a quantitative measure of power within global production and its governance structures

On the dynamics of the Greek twin deficits: Empirical evidence over the period 1960 - 2007

One of the most important open macroeconomic issues, during the current global economic recession, concerns the sustainability of persistent budget and trade deficits as well as possible interactions between them. These deficits are most crucial due to severe debt servicing costs, faced by today's economies despite their development level. This paper presents time series evidence over the period 1960 up to 2007, using data of the Greek Economy. Our results confirm weak sustainability of both deficits and evidence in favor of the Keynesian rationale regarding the twin deficits hypothesis

Intervalling-Effect Bias and Competition Policy

The purpose of this paper is twofold. First, it aims to investigate whether the security's systematic risk beta estimates change as the infrequent trading phenomenon appears. Second, it attempts to provide useful insight on the impact of mergers and acquisitions on competition policy. For this reason, we employ the models of Scholes and Williams (1977), Dimson (1979), Cohen et al. (1983a) and Maynes and Rumsey (1993) on a small stock exchange with thickly infrequent trading stocks. The empirical results reveal that for some securities the models employed by Scholes and Williams (1977) and Cohen et al. (1983a) improve the biasness of the Ordinary Least Squares Market Model (Maynes and Rumsey, 1993). We argue that competitors gain while merged entities loose or at least do not gain from the clearness of the investigated mergers