Holographic complexity in general quadratic curvature theory of gravity

In the context of CA conjecture for holographic complexity, we study the action growth rate at late time approximation for general quadratic curvature theory of gravity. We show how the Lloyd's bound saturates for charged and neutral black hole solutions. We observe that a second singular point may modify the action growth rate to a value other than the Lloyd's bound. Moreover, we find the universal terms that appear in the divergent part of complexity from computing the bulk and joint terms on a regulated WDW patch.Comment: 19 pages, 4 figures; v3. Subsection 2.5 modified and more discussions on the second singularity in new subsection 2.6 added. Accepted for publication in EPJ

Energy Efficient Node Deployment in Wireless Ad-hoc Sensor Networks

We study a wireless ad-hoc sensor network (WASN) where $N$ sensors gather data from the surrounding environment and transmit their sensed information to $M$ fusion centers (FCs) via multi-hop wireless communications. This node deployment problem is formulated as an optimization problem to make a trade-off between the sensing uncertainty and energy consumption of the network. Our primary goal is to find an optimal deployment of sensors and FCs to minimize a Lagrange combination of the sensing uncertainty and energy consumption. To support arbitrary routing protocols in WASNs, the routing-dependent necessary conditions for the optimal deployment are explored. Based on these necessary conditions, we propose a routing-aware Lloyd algorithm to optimize node deployment. Simulation results show that, on average, the proposed algorithm outperforms the existing deployment algorithms.Comment: 7 pages, 6 figure

Tapioca Melanoma of the Iris: a Case Report

Purpose: To report an extremely rare case of tapioca melanoma of the iris in an Iranian patient. Case Report: A 50-year-old male patient presented with ocular pain and redness in the right eye for two weeks. The visual acuity was 7/10 and the intraocular pressure (IOP) was 30 mmHg. A lobulated amelanotic vascularized and nodular (tapioca-like) iris mass with a 180o extent was seen in the right eye. Incisional biopsy of the mass revealed atypical mixed type (epithelioid and spindle cell) melanoma. Brachytherapy with the ruthenium-106 plaque resulted in complete regression of the tumor. Conclusion: Tapioca melanoma of the iris should be considered in the differential diagnosis of patients presenting with nodular vascularized amelanotic iris mass and elevated IOP. Brachytherapy with ruthenium-106 seems to be an effective treatment for tapioca melanoma of the iris

Book Review: Chamot, A. U. and Harris, V. (Eds.) (2019). Learning Strategy Instruction in the Language Classroom : Issues and Implementation. Bristol: Multilingual Matters. 328 pages. ISBN-13: 978-1-78892-339-2

publishedVersio

Effectiveness of Matched and Mismatched Natural Rock Joints Using Experimental Direct Shear Tests

In practice, the shear strength of joints is not only determined by the roughness, but also by the degree of joint matching. Due to alteration or movement, the joints with equal roughness might be mismatched. The matching degree of the joint is a significant factor that controls the normal closure, aperture, stiffness, hydraulic conductivity, and shear strength of the jointed rock mass. Studying the shear behavior of natural mismatched rock joints obtained from core drilling with different morphological characteristics, degrees of matching, and irregular shapes is an issue that has gained less attention due to the lack of samples and difficulty to obtain data. This study investigates the shear behavior of mismatched joints obtained from core drilling. Here, a new criterion is developed based on 35 series of direct shear tests, Barton and other classical theories, three-dimensional morphological characteristics, and matching condition of joints. To validate the proposed criterion, the estimation accuracy of the available classical models is compared with that of the new model. It is observed that the new criterion could achieve higher prediction accuracy for mismatched joints. Moreover, it is found that the average estimation error of the predicted values is reduced by considering the matching conditions

Node Deployment in Heterogeneous Rayleigh Fading Sensor Networks

We study a heterogeneous Rayleigh fading wireless sensor network (WSN) in which densely deployed sensor nodes monitor an environment and transmit their sensed information to base stations (BSs) using access points (APs) as relays to facilitate the data transfer. We consider both large-scale and small-scale propagation effects in our system model and formulate the node deployment problem as an optimization problem aimed at minimizing the wireless communication network's power consumption. By imposing a desired outage probability constraint on all communication channels, we derive the necessary conditions for the optimal deployment that not only minimize the power consumption, but also guarantee all wireless links to have an outage probability below the given threshold. In addition, we study the necessary conditions for an optimal deployment given ergodic capacity constraints. We compare our node deployment algorithms with similar algorithms in the literature and demonstrate their efficacy and superiority

English didactics in Norway : A propaedeutic or parasitic discipline?

Since English didactics has a relatively short history in Norway, exploring its nature, scope, academic identity, definition, status, and raison d'être is an ineluctable necessity. This article sets out to answer a simple yet fundamental question about English didactics: Is English didactics a propaedeutic discipline or a parasitic discipline? We argue that English didactics is warranted to address three interrelated issues if it purports to establish itself as a propaedeutic discipline. First, English didactics needs to demarcate and delimit its disciplinary boundaries with other adjacent disciplines which feed into it. Second, delineating the ontological axioms and epistemological underpinnings as well as the methodological apparatus which distinguish English didactics from other closely related disciplines is warranted. Third, through invoking intellectual capital and scientific findings of other disciplines, English didactics must aim to generate its own novel theoretical and practical knowledge. This article calls for more attention to expounding and theorizing English didactics than currently conceptualized.publishedVersio

EXAMINING THE RELATIONSHIP BETWEEN THE AUDIT COMMITTEE, THE INCENTIVE SYSTEM OF MANAGEMENT AND THE AUDIT FEES OF COMPANIES IN IRAN

Abstract. The purpose of this study is to investigate the relationship between audit committee,management incentive system, and audit fees of companies in Tehran Stock Exchange, of which 69 were selected as a sample during the years 2012 to 2014, according to the systematic elimination rule. This research is applied in terms of purpose and is quasi-experimental in terms of research method. According to the results, the Flimer method is the used pool method. Also, hypothesis testing was performed using multivariate linear regression model. Also, hypothesis testing was performed using multivariate linear regression model. The results of the hypotheses show that there is a significant relationship between the independence, the size and expertise of the audit committee and audit fees, but there is not a significant relationship between the audit committee experience and the incentive system of management, which is derived from the remuneration, and audit fees.Keywords: Audit Committee, management incentive system, audit fees

EXAMINING THE RELATIONSHIP BETWEEN THE AUDIT COMMITTEE, THE INCENTIVE SYSTEM OF MANAGEMENT AND THE AUDIT FEES OF COMPANIES IN IRAN

Abstract. The purpose of this study is to investigate the relationship between audit committee,management incentive system, and audit fees of companies in Tehran Stock Exchange, of which 69 were selected as a sample during the years 2012 to 2014, according to the systematic elimination rule. This research is applied in terms of purpose and is quasi-experimental in terms of research method. According to the results, the Flimer method is the used pool method. Also, hypothesis testing was performed using multivariate linear regression model. Also, hypothesis testing was performed using multivariate linear regression model. The results of the hypotheses show that there is a significant relationship between the independence, the size and expertise of the audit committee and audit fees, but there is not a significant relationship between the audit committee experience and the incentive system of management, which is derived from the remuneration, and audit fees.Keywords: Audit Committee, management incentive system, audit fees