Fully CMOS Memristor Based Chaotic Circuit

This paper demonstrates the design of a fully CMOS chaotic circuit consisting of only DDCC based memristor and inductance simulator. Our design is composed of these active blocks using CMOS 0.18 µm process technology with symmetric ±1.25 V supply voltages. A new single DDCC+ based topology is used as the inductance simulator. Simulation results verify that the design proposed satisfies both memristor properties and the chaotic behavior of the circuit. Simulations performed illustrate the success of the proposed design for the realization of CMOS based chaotic applications

The predictive effect of teachers’ perception of school principals’ motivating language on teachers’ self-efficacy via a cultural context

The aim of the study is to investigate the relationship between teachers' perception of school principals' motivating language and teachers' self-efficacy mediated by the cultural context. School principals' linguistic communication skills are critical to sustain the motivation of teachers and their self-efficacy. Motivating language theory (MLT), on which this study is based, provides a model that helps us understand how the language, more precisely, the speech acts, used by school principals have an impact on teachers' self-efficacy. A survey method was employed with 252 teachers through convenience sampling. The teachers' mean age was 34.87 (SD = 9.22) years, and the average length of service was 11.72 (SD = 9.42) years. The results showed that school principals' use of motivating language was significantly and positively associated with teachers' self-efficacy (b = 0.10, p < 0.000). The low-context culture was found to have a full mediating effect in this relationship (b = 0.04, t = 3.1771, p < 0.000). The findings contribute to leader communication theory by highlighting a particular emphasis on the language school principals use to motivate teachers

How do Stocks in BRICS co-move with Real Estate Stocks?

This paper investigates BRICS markets’ integration and segmentation between real estate indices and stock indices, and the possibility of establishing “wealth” and “credit” effects. The analysis of the relationship is based on updated techniques in time series using the concepts of fractional integration and cointegration and Granger causality. This allows us to look at market efficiency and bi-directional long-run equilibrium relationships between the two variables in the five countries. The results indicate that all the series are highly persistent, with orders of integration around 1 implying the possibility of markets to be efficient. However, we do not find any evidence suggesting long run equilibrium relationships between the real estate stock indices and the stocks indices. Meanwhile, causality is bi-directional in the case of South Africa, thus both “wealth effect” and “credit effect” exist, while only “credit effect” is established in India and Russia.pre-print406 K

Novel Image Analysis Approach Quantifies Morphological Characteristics of 3D Breast Culture Acini with Varying Metastatic Potentials

Prognosis of breast cancer is primarily predicted by the histological grading of the tumor, where pathologists manually evaluate microscopic characteristics of the tissue. This labor intensive process suffers from intra- and inter-observer variations; thus, computer-aided systems that accomplish this assessment automatically are in high demand. We address this by developing an image analysis framework for the automated grading of breast cancer in in vitro three-dimensional breast epithelial acini through the characterization of acinar structure morphology. A set of statistically significant features for the characterization of acini morphology are exploited for the automated grading of six (MCF10 series) cell line cultures mimicking three grades of breast cancer along the metastatic cascade. In addition to capturing both expected and visually differentiable changes, we quantify subtle differences that pose a challenge to assess through microscopic inspection. Our method achieves 89.0% accuracy in grading the acinar structures as nonmalignant, noninvasive carcinoma, and invasive carcinoma grades. We further demonstrate that the proposed methodology can be successfully applied for the grading of in vivo tissue samples albeit with additional constraints. These results indicate that the proposed features can be used to describe the relationship between the acini morphology and cellular function along the metastatic cascade

Beyond Transmitting Bits: Context, Semantics, and Task-Oriented Communications

Communication systems to date primarily aim at reliably communicating bit sequences. Such an approach provides efficient engineering designs that are agnostic to the meanings of the messages or to the goal that the message exchange aims to achieve. Next generation systems, however, can be potentially enriched by folding message semantics and goals of communication into their design. Further, these systems can be made cognizant of the context in which communication exchange takes place, providing avenues for novel design insights. This tutorial summarizes the efforts to date, starting from its early adaptations, semantic-aware and task-oriented communications, covering the foundations, algorithms and potential implementations. The focus is on approaches that utilize information theory to provide the foundations, as well as the significant role of learning in semantics and task-aware communications.Comment: 28 pages, 14 figure

Is there convergence between the BRICS and International REIT Markets?

The BRICS market represents high growth economies. This paper empirically examines the long-run equilibrium as well as the short-run linkages between the BRICS REIT markets and the REIT markets in developed countries (United States, Australia and the United Kingdom). We employ fractional co-integration techniques between the BRICS REIT markets and 3 most developed REIT markets. This paper tests the hypothesis of fractional integration, our results showed no evidence of co-integration between BRICS REIT markets and the REIT markets of any of the developed economies in the long run, while the result only indicated that the BRICS REIT markets is influenced by the developed economies in the short run. The implications of this study shows that a portfolio of developed REIT markets are diversifiable when added into a portfolio of BRICS REIT markets. This is particularly significant for investors and fund analysts in other to reduce portfolio risks

Stock Market Responses to COVID-19: The Behaviors of Mean Reversion, Dependence and Persistence

We examine stock market responses during the COVID-19 pandemic period using fractional integration techniques. The evidence suggests that stock markets generally follow a synchronized movement before and the stages of the pandemic shocks. We find while mean reversion significantly declines, the degree of persistence and dependence has been increased in the majority of the stock market indices in whole sample analysis covering the period of 02.08.2019 and 09.07.2020. This outcome implies increasing integration and possibly declining benefits of diversification for the global stock portfolio management

How do Stocks in BRICS co-move with REITs?

This paper investigates BRIC markets’ integration and segmentation between REITs and stock indices, and the possibility of establishing “wealth” and “credit” effects. The analysis of the relationship is based on updated techniques in time series using the concepts of fractional integration and cointegration and Granger causality. This allows us to look at bidirectional long-run equilibrium relationships between the two variables in the five countries. The results indicate that all the series are highly persistent, with orders of integration around 1. However, we do not find any evidence suggesting long run equilibrium relationships between the REITs and the stocks. Meanwhile, causality is bi-directional in the case of South Africa, thus both “wealth effect” and “credit effect” exist, while only “credit effect” is established in India and Russia