The complexities of nonperturbative computations

The paper studies the behavior of equations of motions of Green’s functions under different running coupling constants in strongly coupled gauge field theories in terms of the Kolmogorov complexity

Riemann-Hilbert problem and quantum field theory: integrable renormalization, Dyson-Schwinger equations

In the first purpose, we concentrate on the theory of quantum integrable systems underlying the Connes-Kreimer approach. We introduce a new family of Hamiltonian systems depended on the perturbative renormalization process in renormalizable theories. It is observed that the renormalization group can determine an infinite dimensional integrable system such that this fact provides a link between this proposed class of motion integrals and renormalization flow. Moreover, with help of the integral renormalization theorems, we study motion integrals underlying Bogoliubv character and BCH series to obtain a new family of fixed point equations. In the second goal, we consider the combinatorics of Connes-Marcolli approach to provide a Hall rooted tree type reformulation from one particular object in this theory namely, universal Hopf algebra of renormalization $H_{\mathbb{U}}$. As the consequences, interesting relations between this Hopf algebra and some well-known combinatorial Hopf algebras are obtained and also, one can make a new Hall polynomial representation from universal singular frame such that based on the universal nature of this special loop, one can expect a Hall tree type scattering formula for physical information such as counterterms. In the third aim, with attention to the given rooted tree version of $H_{\mathbb{U}}$ and by applying the Connes-Marcolli's universal investigation, we discover a new geometric explanation from Dyson-Schwinger equations

Gating of high-mobility InAs metamorphic heterostructures

We investigate the performance of gate-defined devices fabricated on high mobility InAs metamorphic heterostructures. We find that heterostructures capped with In$_{0.75}$Ga$_{0.25}$As often show signs of parallel conduction due to proximity of their surface Fermi level to the conduction band minimum. Here, we introduce a technique that can be used to estimate the density of this surface charge that involves cool-downs from room temperature under gate bias. We have been able to remove the parallel conduction under high positive bias, but achieving full depletion has proven difficult. We find that by using In$_{0.75}$Al$_{0.25}$As as the barrier without an In$_{0.75}$Ga$_{0.25}$As capping, a drastic reduction in parallel conduction can be achieved. Our studies show that this does not change the transport properties of the quantum well significantly. We achieved full depletion in InAlAs capped heterostructures with non-hysteretic gating response suitable for fabrication of gate-defined mesoscopic devices

The study of Total Hemocyte Count and Total Protein Plasma in shrimp Litopenaeus vannamei infected with Monodon baculovirus

The investigation of Total Hemocyte Count (THC) and Total Protein Plasma (TPP) in shrimp juvenile Litopenaeus vannamei that exposed with Monodon Baculovirus (MBV) was carried out. Three hundred and sixty shrimps with average weight 7 to 12 g were selected from Heleh site in Bousher province and transported to Iran Shrimp Research Institute. The shrimp was acclimated during two days for stress reduction and adaptation. The shrimps were cheeked by PCR for WSSV, MBV, HPV, TSV, IHHNV and NHP and the result showed they are free of these diseases. The experiment was designed with selected 60 shrimps in triplicate as treatment and exposed with MBV during 12 hours and control group with triplicate without exposing with MBV. The hemolymph was withdrawn from abdominal segments of samples for measuring THC and TPC evaluation at designed hours (0, 12, 24, 48, 72 and 96). The PCR test confirmed the MBV in treatment and the control were free of viruses. The results showed that the difference of THC and TPP value between treatment and control group during the experiment was significant (P < 0.05). This finding can be used for assessing the health of shrimp culture and prevention of MBV

Effect of preparation temperature and ions doping on size, morphology and catalytic activity of Co-B amorphous nano catalyst

Binary and quaternary amorphous nano powders are prepared by wet reduction method. Cobalt boride nano catalyst is synthesized at 10 and 60 ºC. Effect of preparation temperature on size and morphology was studied. Co-M-Zr-B (M: Cr, Mo and W) as quaternary catalysts are also prepared in order to studying ions doping on chemical and physical properties. Indeed, the obtained materials are characterized by XRD, FE-SEM, TEM, BET and ICP techniques. No distinct peak could be observed in XRD patterns indicating that the all catalysts possessed amorphous. The catalytic activity of the synthesized catalysts is investigated for the reduction reaction of 4-nitrophenol to 4-aminophenol in the presence of excess NaBH4 in aqueous medium at room temperature (298 K). It is found that our catalysts are highly active for high concentrations of 4-NP, 25-200 ppm. KEY WORDS: Amorphous, Nano catalyst, Metal boride, Reduction, Nitrophenol Bull. Chem. Soc. Ethiop. 2015, 29(1), 105-116DOI: http://dx.doi.org/10.4314/bcse.v29i1.

Effects of the Health Belief Model (HBM)-based educational program on the nutritional knowledge and behaviors of CABG patients

Background: Reducing blood pressure through diet decreases the possibility of heart attacks, and lowering blood cholesterol can reduce the risk of coronary artery disease. The aim of the present study was to examine the effects of education based on the Health Belief Model on the dietary behavior of patients following coronary artery bypass graft surgery (CABG) at the Heart Surgery Department of Shahid Beheshti Hospital of Qom. Methods: In this semi-experimental clinical trial, data were collected on 64 patients, at an average age of 59.9 ± 7.26 years in the intervention group and 58.5 ± 7.6 years in the control group. Seventy percent of the study subjects were male and 30 were female. Intervention and control groups were given a questionnaire, comprising 56 questions in 5 parts. The educational intervention was aimed at creating perceived susceptibility and perceived severity in the intervention group. After 1 month. Both groups were tested, and the resulting data were analyzed to investigate the effects of the educational intervention on the nutritional knowledge and behavior of the patients. Results: According to the results, educational intervention caused a significant increase in the mean scores of knowledge (p value = 0.001), perceived severity (p value = 0.007), and perceived benefits and barriers (p value = 0.003) in the intervention group but did not cause a significant increase in the mean score of nutritional behavior (p value = 0.390). Conclusion: Education based on the Health Belief Model seems to be effective in improving nutritional knowledge, but more consistent and comprehensive educational programs are necessary in order to change behavior and improve nutritional behavior. © 2016, Tehran Heart Center. All rights reserved

Neonatal Sepsis Alters the Excitability of Regular Spiking Cells in the Nucleus of the Solitary Tract in Rats

OBJECTIVE: Sepsis is a leading cause of mortality and morbidity in infants. Although the measures of autonomic dysfunction (e.g. reduced heart rate variability) predict mortality in sepsis, the mechanism of sepsis-induced autonomic dysfunction has remained elusive. The nucleus of the solitary tract hjh(NTS) is a vital structure for the integrated autonomic response to physiological challenges. In the present study we hypothesized that sepsis alters the excitability of NTS neurons in a rat model of neonatal sepsis (14-day old rats). METHODS AND RESULTS: Sepsis was induced by intraperitoneal injection of cecal slurry (CS) in rat neonates. The presence of autonomic dysfunction was confirmed by observing a significant reduction in both short-term and long-term heart rate variably following CS injection. We investigated the effect of polymicrobial sepsis on the electrophysiological properties of the medial NTS neurons using a whole cell patch clamp recording. Our results showed that the resting membrane potential in regular spiking neurons was significantly less polarized in the septic group (-37.6 ± 1.76 mv) when compared with the control group (-54.7 ± 1.73 mv, P < 0.001). The number of spontaneous action potentials in the septic group, was also significantly higher than the control group (P < 0.05). In addition, the frequency and amplitude of the spontaneous excitatory post synaptic potentials (EPSPs) was significantly higher in neurons recorded in the septic group (P < 0.001). Interestingly, regular spiking cells in the CS group exhibited a rebound action potential following hyperpolarization. Injection of depolarizing currents was associated with lower first spike latency and changes in rise slope of action potential (P < 0.001). CONCLUSIONS: We showed that polymicrobial sepsis increases the excitability of regular spiking cells in the medial NTS. These alterations can potentially affect neural coding and thus may contribute to an abnormal homeostatic or allostatic physiological response to sepsis and systemic inflammation

Implementation of Recurrent Neural Network to Control Rotational Inverted Pendulum using IMC Scheme

Abstract: Problem statement:This paper presents an overview of a controller for a Rotational Inverted Pendulum (RIP) based on a New Recurrent Neural Network (NRNN) using Internal Model control (IMC). The RIP consists of a DC servo motor, arm and pendulum. The RIP is modelled in MATLAB/Simulink and the simulation results are shown besides the experimental results. The proposed experiment shows intelligent method for stabilizing the RIP, which can recommend the control designers of nonlinear systems. The outcome exposed that the NRNN controller competent of controlling the RIP system productively, as exposed in the simulation results