Work related rights of foreign migrant workers in Viet Nam

Viet Nam today is deeper integrating into the global economy. In 2012/2013 the new Labour Code and amended Trade Union Law were promulgated and enacted. Numerous implementation Decrees and Circulars were introduced and enacted accordingly, which directly relate to the lives and work of the workers including foreign migrant workers. This article aims at examining and discussing the issues on foreign migrant workers in the contemporary Viet Nam. It is shown that despite positive changes in the new policies and laws the Vietnamese authority bodies have remain ineffectively responded to the issue of foreign labour in the context of significant economic growth

A first principles simulation framework for the interactions between a Si(001) surface and a scanning probe

By means of total energy calculations within the framework of the local density approximation (LDA), the interactions between a silicon Si(001) surface and a scanning probe are investigated. The tip of the probe, comprising 4 Si atoms scans along the dimer lines above an asymmetric p(2 × 1) surface, at a distance where the chemical interaction between tip-surface is dominant and responsible for image resolution. At that distance, the tip causes the dimer to toggle when it scans above the lower atom of a dimer. The toggled dimers create an alternating pattern, where the immediately adja-cent neighbours of a toggled dimer remain unchanged. After the tip has fully scanned across the p(2 × 1) surface, causes the dimers to arrange in a p(2 × 2) reconstruction, reproducing the images obtained in scanning probe experiments. Our modelling methodology includes simulations that reveal the energy input required to overcome the barrier to the onset of dimer toggling. The results show that the energy input to overcome this barrier is lower for the p(2 × 1) surface than that for the p(2 × 2) or c(4 × 2) surfaces.This work has been supported by the UK Engineering and Physical Sciences Research Council (EPSRC) under contract EP/F009801/1 and Brunel University’s BRIEF award scheme. The authors would like to thank the School of Engineering and Design for purchasing our computing cluster to support research in this area. All simulations were performed on the cluster comprising 64 processors at Brunel University

When do correlations increase with firing rates in recurrent networks?

A central question in neuroscience is to understand how noisy firing patterns are used to transmit information. Because neural spiking is noisy, spiking patterns are often quantified via pairwise correlations, or the probability that two cells will spike coincidentally, above and beyond their baseline firing rate. One observation frequently made in experiments, is that correlations can increase systematically with firing rate. Theoretical studies have determined that stimulus-dependent correlations that increase with firing rate can have beneficial effects on information coding; however, we still have an incomplete understanding of what circuit mechanisms do, or do not, produce this correlation-firing rate relationship. Here, we studied the relationship between pairwise correlations and firing rates in recurrently coupled excitatory-inhibitory spiking networks with conductance-based synapses. We found that with stronger excitatory coupling, a positive relationship emerged between pairwise correlations and firing rates. To explain these findings, we used linear response theory to predict the full correlation matrix and to decompose correlations in terms of graph motifs. We then used this decomposition to explain why covariation of correlations with firing rate—a relationship previously explained in feedforward networks driven by correlated input—emerges in some recurrent networks but not in others. Furthermore, when correlations covary with firing rate, this relationship is reflected in low-rank structure in the correlation matrix

Theory of electron spin resonance in bulk topological insulators Bi2Se3, Bi2Te3 and Sb2Te3

We report a theoretical study of electron spin resonance in bulk topological insulators, such as Bi2Se3, Bi2Te3 and Sb2Te3. Using the effective four-band model, we find the electron energy spectrum in a static magnetic field and determine the response to electric and magnetic dipole perturbations, represented by oscillating electric and magnetic fields perpendicular to the static field. We determine the associated selection rules and calculate the absorption spectra. This enables us to separate the effective orbital and spin degrees of freedom and to determine the effective g-factors for electrons and holes.Comment: 10 pages, 4 figure

Quality Review of Irradiated Cellular Blood Product Orders

Objectives: Our goal is to educate house staff on the indications for irradiated blood products. We hope to reduce the number of inappropriate irradiation orders to less than 50% of the total orders for irradiated blood products and to be followed up over time.https://jdc.jefferson.edu/patientsafetyposters/1062/thumbnail.jp