Correlation effects on magnetic frustration in the triangular-lattice Hubbard model

Evolution of the magnetic response function in the triangular-lattice Hubbard model is studied with interaction strength within a systematic inverse-degeneracy expansion scheme which incorporates self-energy and vertex corrections and explicitly preserves the spin-rotation symmetry. It is shown that at half filling the response function goes through a nearly dispersionless regime around K for intermediate coupling strength, before undergoing an inversion at strong coupling, resulting in maximum response at the K point, consistent with the expected 120^o AF instability. Effects of finite hole/electron doping on the magnetic response function are also examined.Comment: 20 pages, 9 figure

Spontaneous Symmetry Breaking and the Renormalization of the Chern-Simons Term

We calculate the one-loop perturbative correction to the coefficient of the \cs term in non-abelian gauge theory in the presence of Higgs fields, with a variety of symmetry-breaking structures. In the case of a residual $U(1)$ symmetry, radiative corrections do not change the coefficient of the \cs term. In the case of an unbroken non-abelian subgroup, the coefficient of the relevant \cs term (suitably normalized) attains an integral correction, as required for consistency of the quantum theory. Interestingly, this coefficient arises purely from the unbroken non-abelian sector in question; the orthogonal sector makes no contribution. This implies that the coefficient of the \cs term is a discontinuous function over the phase diagram of the theory.Comment: Version to be published in Phys Lett B., minor additional change

A Coupled Compressive Sensing Scheme for Unsourced Multiple Access

This article introduces a novel paradigm for the unsourced multiple-access communication problem. This divide-and-conquer approach leverages recent advances in compressive sensing and forward error correction to produce a computationally efficient algorithm. Within the proposed framework, every active device first partitions its data into several sub-blocks, and subsequently adds redundancy using a systematic linear block code. Compressive sensing techniques are then employed to recover sub-blocks, and the original messages are obtained by connecting pieces together using a low-complexity tree-based algorithm. Numerical results suggest that the proposed scheme outperforms other existing practical coding schemes. Measured performance lies approximately $4.3$~dB away from the Polyanskiy achievability limit, which is obtained in the absence of complexity constraints

Anomalous dust temperature in dusty plasma experiments

Dust heating in dusty plasmas due to thermal electric field fluctuations and dust acoustic waves is examined. It is shown that dust particles acquire large random motion in fluctuating electric fields (within dust cloud) of background plasma causing dust electrostatic pressure PE [K. Avinash, Phys. Plasmas 13 (2006) 012109] and corresponding large temperature TE. Due to quadratic dependence on qd and high dust charge (∼ 103–104e), TE is much bigger than the dust kinetic temperature Td and is in the range of 10–300 eV for typical experimental numbers. Using global energy constraints dust heating due to dust acoustic waves is examined. It is shown that dust acoustic waves are potentially capable of heating dust to high temperatures in the range of a few hundreds of eV

Probe induced voids in a dusty plasma

An experimental study of the formation of voids (dust-free regions) around negatively biased probes in a dusty plasma is described. Stable voids are maintained by the balance of electric and ion drag forces on the dust particles. A theoretical model is proposed to explain how the size of the void scales with the probe bias potential

Testudines of India: A Review on Diversity, Threats and Conservation Initiatives

The present review is a collection of the available literature resources related to Testudines of India. Different aspects of diversity studies pertaining to turtles in India is presented in this review along with threats and conservation initiatives in different parts of India in different timeline

Correlation of serum magnesium levels with renal parameters in patients with acute kidney injury

Background: Acute kidney injury is a common problem with various causes and consequences like electrolyte disturbances in the form of hypocalcaemia, hypokalemia, hyperkalemia depending on the phase. Hypomagnesaemia is one of the most common electrolyte disturbance found in hospitalized patients especially in the critically ill patients. Prevalence of hypomagnesemia varies from 11 to 65% in different studies. Hence, we decided to conduct a study to evaluate correlation of serum magnesium levels in AKI.Methods: A cross-sectional, hospital based time bound study was conducted between November 2016 and August 2018 with a sample of 100 patients aged 18-65 years and who had AKI were included and patients with diabetes mellitus, multi-organ dysfunction, obstructive uropathy and drug induced AKI were excluded from study. The decrease in magnesium <1.7 mg/L was defined as hypomagnesaemia. AKI was defined as per AKIN criteria. Day 1, day 3 and day 6 magnesium levels were measured.Results: Prevalence of hypomagnesaemia was 53%, 30% and 36% on day 1, day 3 and day 6 respectively. It was observed that there was a positive correlation between serum magnesium, and serum creatinine. Normomagnsemia and hypermagnesemia on day 1, 3 and 6 were significantly associated with recovery of AKI (p<0.001).Conclusions: The prevalence of hypomagnesemia was significantly higher in AKI patients and normal magnesium and hypermagnesium on day 1, 3 and day 6 was associated with recovery than non-recovery. Hypomagnesemia was associated more with non-recovery then recovery

A SIMPLE AUTOMOTIVE APPLICATION USING FLEXRAY™ PROTOCOL

FlexRay™ protocol is emerging as the next generation automotive communication protocol which offers high data rate, deterministic, fault tolerant, flexible in-vehicle data communication. This protocol supports both time triggered and event triggered data communication. The network that uses FlexRay™ protocol is called FlexRay™ network. The need for FlexRay™ protocol is the substantial demand for the high capacity in-vehicle data communication between the electronic components. In this work, we used Infineon SoCs as FlexRay™ nodes and establish communication between multiple nodes using FlexRay™ protocol. A simple automotive application is developed with temperature and magnetic field sensor being connected to a node and the sensor data is being communicated over the FlexRay™ network