Resource Allocation for Energy-Efficient Device-to-Device Communication in 4G Networks

Device-to-device (D2D) communications as an underlay of a LTE-A (4G) network can reduce the traffic load as well as power consumption in cellular networks by way of utilizing peer-to-peer links for users in proximity of each other. This would enable other cellular users to increment their traffic, and the aggregate traffic for all users can be significantly increased without requiring additional spectrum. However, D2D communications may increase interference to cellular users (CUs) and force CUs to increase their transmit power levels in order to maintain their required quality-of-service (QoS). This paper proposes an energy-efficient resource allocation scheme for D2D communications as an underlay of a fully loaded LTE-A (4G) cellular network. Simulations show that the proposed scheme allocates cellular uplink resources (transmit power and channel) to D2D pairs while maintaining the required QoS for D2D and cellular users and minimizing the total uplink transmit power for all users.Comment: 2014 7th International Symposium on Telecommunications (IST'2014

A Discussion Paper on Stigmatizing Features of Diabetes

Aim This manuscript aims to describe stigmatizing features of diabetes. Design This article presents a narrative review of literature pertaining to stigma surrounding diabetes in different contexts. Methods A literature search was conducted in CINAHL, PubMed and Web of Science for qualitative studies published between 2007–2017. The search was completed using various combinations of diabetes, T1DM, T2DM, stigma, social/public stigma, internalized/self‐stigma, stigmatization and diabetes‐related stigma in English. The reviewers then independently reviewed the eligible studies (N = 18) to extract data. Results From the 18 studies included in this narrative review, seven features related to stigma in diabetes were identified. People with diabetes were most notably considered and stigmatized as being “sick,” “death reminder,” “rejected marriage candidate,” “self‐inflicting,” “contagiousness,” “requiring a dietary modification” and “drunk or drug abuser.

A discussion paper on stigmatizing features of diabetes

AimThis manuscript aims to describe stigmatizing features of diabetes.DesignThis article presents a narrative review of literature pertaining to stigma surrounding diabetes in different contexts.MethodsA literature search was conducted in CINAHL, PubMed and Web of Science for qualitative studies published between 2007–2017. The search was completed using various combinations of diabetes, T1DM, T2DM, stigma, social/public stigma, internalized/self‐stigma, stigmatization and diabetes‐related stigma in English. The reviewers then independently reviewed the eligible studies (N = 18) to extract data.ResultsFrom the 18 studies included in this narrative review, seven features related to stigma in diabetes were identified. People with diabetes were most notably considered and stigmatized as being “sick,” “death reminder,” “rejected marriage candidate,” “self‐inflicting,” “contagiousness,” “requiring a dietary modification” and “drunk or drug abuser.”Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/142964/1/nop2112.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/142964/2/nop2112_am.pd

Quantum teleportation with nonclassical correlated states in noninertial frames

Quantum teleportation is studied in noninertial frame, for fermionic case, when Alice and Bob share a general nonclassical correlated state. In noninertial frames two fidelities of teleportation are given. It is found that the average fidelity of teleportation from a separable and nonclassical correlated state is increasing with the amount of nonclassical correlation of the state. However, for any particular nonclassical correlated state, the fidelity of teleportation decreases by increasing the acceleration.Comment: 10 pages, 3 figures, expanded version to appear in Quantum Inf. Proces

FOXD3 Regulates VISTA Expression in Melanoma.

Immune checkpoint inhibitors have improved patient survival in melanoma, but the innate resistance of many patients necessitates the investigation of alternative immune targets. Many immune checkpoint proteins lack proper characterization, including V-domain Ig suppressor of T cell activation (VISTA). VISTA expression on immune cells can suppress T cell activity; however, few studies have investigated its expression and regulation in cancer cells. In this study, we observe that VISTA is expressed in melanoma patient samples and cell lines. Tumor cell-specific expression of VISTA promotes tumor onset in vivo, associated with increased intratumoral T regulatory cells, and enhanced PDL-1 expression on tumor-infiltrating macrophages. VISTA transcript levels are regulated by the stemness factor Forkhead box D3 (FOXD3). BRAF inhibition upregulates FOXD3 and reduces VISTA expression. Overall, this study demonstrates melanoma cell expression of VISTA and its regulation by FOXD3, contributing to the rationale for therapeutic strategies that combine targeted inhibitors with immune checkpoint blockade

The effects of traffic noise on drivers' cognitive performance

Background and aims: Traffic noise is one of the most important environmental pollutants. World health organization has determined the health effects of community noise including cognitive performance disorders. The aim of this research was to study the effects of road traffic noise on peripheral perception and choice reaction time performance drivers. Methods: Thirty five male students from the faculty of health, Tehran University of Medical Sciences, participated in the study. Peripheral perception and reaction time tests from Vienna test system package in the case of exposure to traffic and silent conditions were performed. The main variables of this research were field of vision, tracking deviation, incorrect reactions, omitted reactions, mean mental reaction time and mean motor time. Road traffic noise was recorded from main streets of Tehran by Sony ICD MAX20 voice recorder, and was played back in an acoustic room. Results: Comparison of result of peripheral perception after exposure to traffic noise showed slight difference in field of vision (p=0.85), tracking deviation (p=0.59), incorrect reaction (p=0.42) and omitted reactions (p=0.57), but they were not statistically significant. Also no significant differences were observed in mean mental reaction time (p=0.47) and mean motor time (p=0.49). Conclusion: Results of this study show that peripheral perception and choice reaction time variables were not affected by traffic noise. © 2015, Tehran University of Medical Sciences and Health Services. All rights reserved

The prevalence of depression among Iranian infertile couples: an update systematic review and meta-analysis

Background: Depression is a common mental disorder. Infertility can lead to depression. The current systematic review and meta-analysis were conducted to estimate the pooled prevalence of depression among Iranian infertile couples. Seven electronic databases (Google Scholar, MagIran, SID, Science Direct, PubMed, Scopus, Web of Science) were searched, up to August 2019, for relevant published studies. The pooled prevalence of depression also pooled mean of depression score was determined using a random-effects model with a 95 confidence interval (95 CI). All analyses performed using Stata ver11 (Stata Corporation, College Station, TX, USA). The 0.05 was considered a significant level. The main body: Totally, 230 studies were retrieved and 31 studies included in the meta-analysis. The pooled prevalence of depression among infertile couples was about 35.3 (95 CI 24.1�46.5), and the prevalence of depression among females and males was 48.7 (95 CI 24.0�73.3) and 9 (95 CI 0 to 23.7), respectively. Conclusions: Our findings suggest a high prevalence of depression in infertile couples. The results can highlight an important and growing mental disorder among infertile couples that may be overlooked. © 2020, The Author(s)

A low-dose chest CT protocol for the diagnosis of COVID-19 pneumonia: a prospective study

Purpose: The increasing trend of chest CT utilization during the COVID-19 pandemic necessitates novel protocols with reduced dose and maintained diagnostic accuracy. We aimed to investigate the diagnostic accuracy of 30-mAs chest CT protocol in comparison with a 150-mAs standard-dose routine protocol for imaging of COVID-19 pneumonia. Methods: Upon IRB approval, consecutive laboratory-confirmed positive COVID-19 patients aged 50 years or older who were referred for chest CT scan and had same-day normal CXR were invited to participate in this prospective study. First, a standard-dose chest CT scan (150 mAs) was performed. Only if typical COVID-19 pneumonia features were identified, then a low-dose CT (30 mAs) was done immediately. Diagnostic accuracy of low-dose and standard-dose CT in the detection of typical COVID-19 pneumonia features were compared. Results: Twenty patients with a mean age of 64.20 ± 13.8 were enrolled in the study. There was excellent intrareader agreement in detecting typical findings of COVID-19 pneumonia between low-dose and standard-dose (intraclass correlation coefficient ICC = 0.98–0.99, P values < 0.001 all readers). The mean effective dose values in standard- and low-dose groups were 6.60 ± 1.47 and 1.80 ± 0.42 mSv, respectively. Also, absolute cancer risk per mean cumulative effective dose values obtained from the standard- and low-dose CT examinations were 2.71 × 10−4 and 0.74 × 10−4, respectively. Conclusions: According to our study, it was found that proposed low-dose CT chest protocol is reliable in detecting COVID-19 pneumonia in daily practice with significant reduction in radiation dose and estimated cancer risk. © 2020, American Society of Emergency Radiology

Non-Hermitian Hamiltonians with a Real Spectrum and Their Physical Applications

We present an evaluation of some recent attempts at understanding the role of pseudo-Hermitian and PT-symmetric Hamiltonians in modeling unitary quantum systems and elaborate on a particular physical phenomenon whose discovery originated in the study of complex scattering potentials.Comment: 9 pages, contributed to Homi Bhabha Centenary Conference on Non-Hermitian Hamiltonians in Quantum Physics (8th International Workshop on Pseudo-Hermitian Hamiltonians in Quantum Physics), held in Mumbai, January 13-16, 200