bluuebunny/crossref_metadata_2025 huggingface dataset:
Asymmetric Large Deformation Superharmonic and Subharmonic Resonances of Spiral Stiffened Imperfect FG Cylindrical Shells Resting on Generalized Nonlinear Viscoelastic Foundations
Authors: Foroutan Kamran , Ahmadi Habib , Shariyat Mohammad
Published: May 2020

This paper is devoted to superharmonic and subharmonic behavior investigation of imperfect functionally graded (FG) cylindrical shells with external FG spiral stiffeners under large amplitude excitations. The structure is embedded within a generalized nonlinear viscoelastic foundation, which is composed of a two-parameter Winkler–Pasternak foundation augmented by a Kelvin–Voigt viscoelastic model with a nonlinear cubic stiffness, to account for the vibration hardening/softening phenomena and damping considerations. The von Kármán strain-displacement kinematic nonlinearity is employed in the constitutive laws of the shell and stiffeners. The external spiral stiffeners of the cylindrical shell are modeled according to the smeared stiffener technique. The coupled governing equations are solved by using Galerkin’s method in conjunction with the stress function concept. The multiple scales method is utilized to detect the subharmonic and superharmonic resonances and the frequency–amplitude relations of the 1/3 and 1/2 subharmonic and 3/1 and 2/1 superharmonic resonances of the system. Finally, the influences of the stiffeners helical angles, foundation type, coefficient of the nonlinear elastic foundation, material distribution, and excitation amplitude on the system resonances are investigated comprehensively.
Gender Competitiveness and Predictability, and Prize Money in Grand Slam Tennis Tournaments
Authors: Feldman David , Gross Shulamith T. , Long Yang
Published: May 2020

Tournament competitiveness and predictability of outcomes are inversely related. We introduce a new measure of competitiveness or predictability using discrepancies between tennis players’ seed values and attained ranks in all rounds of the four Grand Slam Tennis Tournaments (GST). Using data from the Association of Tennis Professionals and Women’s Tennis Association, we study gender-differentiated competitiveness or predictability and its dependence on prize money. Men’s GST are less predictable and more competitive than women’s GST. While competitiveness increases with prize money, the increase for women is significantly larger than for men.
Triassic mudstones of the Central North Sea: cross-border characterization, correlation and their palaeoclimatic significance
Authors: Archer Stuart G. , McKie Tom , Andrews Steven D. , Wilkins Anne D. , Hutchison Matt , Young-Ziolkowski Nathan , Osunde Christabel , Matheson Joanna , Thackrey Scott , Lang Marcus , Sola Bente , Mouritzen Christoffer , Perrell Chris , Greenwood Mark , Mauritzen Emil , Tenepalli Srinivas
Published: May 2020

The Triassic of the Central North Sea is a continental succession that contains prolific hydrocarbon-bearing fluvial sandstone reservoirs stratigraphically partitioned by mudstones. Within the Skagerrak Formation of the UK sector, hydrocarbon accumulations in the Judy, Joanne and Josephine Sandstone members are top sealed by the Julius, Jonathan and Joshua Mudstone members, respectively. However, UK and Norwegian stratigraphic correlations have been problematical for decades, largely due to biostratigraphic challenges but also due to the non-uniqueness of the lithotypes and because the cross-border stratigraphic nomenclature differs and has yet to be rationalized. This study focuses on mudstones rather than sandstones to unify cross-border correlation efforts at a regional scale. The mudstone members have been characterized by integrating sedimentological, petrophysical and geophysical data. The facies are indicative of playa lakes that frequently desiccated and preserved minor anhydrite. These conditions alternated with periods of marshy, palustrine conditions favourable for the formation of dolostones. Regional correlations have detected lateral facies changes in the mudstones which are important for their seismically mappable extents, resulting palaeogeographies and, ultimately, their competency as intraformational top seals. Significant diachroneity is associated with the lithological transitions at sandstone–mudstone member boundaries and although lithostratigraphic surfaces can be used as timelines over short distances (e.g. within a field), they should not be assumed to represent timelines over longer correlation lengths. Palaeoclimatic trends are interpreted and compared to those of adjacent regions to test the extent and impact of climate change as a predictive allogenic forcing factor on sedimentation. Mudstone member deposition occurred as a result of the retreat of large-scale terminal fluvial systems during a return to more arid ‘background’ climatic conditions. The cause of the member-scale climatic cyclicity observed within the Skagerrak Formation may be related to volcanic activity in large igneous provinces which triggered the episodic progradation of fluvial systems.
Comparison of pleural and esophageal pressure in supine and prone positions in a porcine model of acute respiratory distress syndrome
Authors: Terzi N. , Bayat S. , Noury N. , Turbil E. , Habre W. , Argaud L. , Cour M. , Louis B. , Guérin C.
Published: May 2020

In a porcine model of acute respiratory distress syndrome, we found that static end-expiratory esophageal pressure did not change significantly in prone position compared with supine position at any positive end-expiratory pressure (PEEP) tested between 5 and 20 cmH2O. Prone position was associated with an increased ventral pleural pressure and reduced end-expiratory dorsal-to-ventral pleural pressure (Ppl) vertical gradient, likely due to a more even distribution of mechanical forces over the chest wall.
Clinical Characteristics of Systemic Lupus Erythematosus with Cirrhosis
Authors: You Hanxiao , Peng Linyi , Zhao Jiuliang , Fei Yunyun , Wang Qian , Zhang Wen , Li Mengtao , Zeng Xiaofeng
Published: May 2020

Aim. Cirrhosis is rare in systemic lupus erythematosus (SLE) patients with a poor prognosis. This study is aimed at retrospectively analyzing our single-center experience to explore the characteristics of cirrhosis in SLE patients. Methods. SLE patients with cirrhosis from 2012 to 2019 were enrolled. SLE diagnosis was rigorously confirmed by a medical record review according to the revised 1997 American College of Rheumatology classification criteria for SLE. The diagnosis of liver cirrhosis was based on a combination of clinical, laboratory, and imaging criteria features. We conducted a case-control study in SLE patients complicated with the cirrhosis group and the age-, sex-, and entry-time-matched noncirrhosis group. Results. A total of 21 patients with SLE cirrhosis were enrolled, 3 males and 18 females. The median age at the time of cirrhosis diagnosis was 47.3±4.0 years, and the mean disease duration of SLE before cirrhosis was 4.7±1.0 years. The most common initial presentation was the involvement of the hematological system in 9 patients and then skin and mucosal involvement in 5 patients, arthritis in 4 patients, and nephritis in 3 patients. Patients with cirrhosis had a significantly higher rate of hematological system involvement (thrombocytopenia and leukopenia) and worse liver function; a higher level of immune globulin G had higher mortality (p<0.05) than patients without cirrhosis. Conclusions. Cirrhosis is a rare and severe subtype of SLE with a poor prognosis. Those patients with hematological system involvement and impaired liver function should be paid more attention.
Nontrivial Solutions for a Class ofp-Kirchhoff Dirichlet Problem
Authors: Hu Xian , Lan Yong-Yi
Published: May 2020

This paper is devoted to the followingp-Kirchhoff type of problems−a+b∫Ω∇updxΔpu=fx,u,x∈Ωu=0,x∈∂Ωwith the Dirichlet boundary value. We show that thep-Kirchhoff type of problems has at least a nontrivial weak solution. The main tools are variational method, critical point theory, and mountain-pass theorem.
Expiratory Flow Limitation at Different Exercise Intensities in Coronary Artery Disease
Authors: Castello-Simões Viviane , Karsten Marlus , Minatel Vinicius , Simões Rodrigo Polaquini , Silva Ester , Tamburús Nayara Yamada , Arena Ross , Borghi-Silva Audrey , Catai Aparecida Maria
Published: May 2020

Introduction. Expiratory flow limitation (EFL) during moderate intensity exercise is present in patients with myocardial infarction (MI), whereas in healthy subjects it occurs only at a high intensity. However, it is unclear whether this limitation already manifests in those with stable coronary artery disease (CAD) (without MI). Materials and Methods. Forty-one men aged 40–65 years were allocated into (1) recent MI (RMI) group (n = 8), (2) late MI (LMI) group (n = 12), (3) stable CAD group (n = 9), and (4) healthy control group (CG) (n = 12). All participants underwent two cardiopulmonary exercise tests at a constant workload (moderate and high intensity), and EFL was evaluated at the end of each exercise workload. Results. During moderate intensity exercise, the RMI and LMI groups presented with a significantly higher number of participants with EFL compared to the CG (p<0.05), while no significant difference was observed among groups at high intensity exercise (p>0.05). Moreover, EFL was only present in MI groups during moderate intensity exercise, whereas at high intensity all groups presented EFL. Regarding the degree of EFL, the RMI and LMI groups showed significantly higher values at moderate intensity exercise in relation to the CG. At high intensity exercise, significantly higher values for the degree of EFL were observed only in the LMI group. Conclusion. The ventilatory limitation at moderate intensity exercise may be linked to the pulmonary consequences of the MI, even subjects with preserved cardiac and pulmonary function at rest, and not to CAD per se.
Theoretical Framework for Creep Effect Analysis of Axially Loaded Short CFST Columns under High Stress Levels
Authors: Li Shiwei , Yang Yongqing , Wen Wangqing , Yan Aiguo
Published: May 2020

Due to its excellent mechanical performances, axially loaded concrete‐filled steel circular tube (CFST) columns have been widely used in structural engineering. As an important long‐term behaviour of CFST structures, the creep has an obvious nonlinear property under high stress levels, which makes the influence of creep more complicated. In this study, to analyze the impacts of nonlinear creep effect on the behaviour of axially loaded short CFST columns, a complete theoretical framework for coupling analysis of 3D creep effect and material nonlinearity was presented. First, the concrete damaged plasticity model with a uniform constraint (UCCDP) was established to simulate the plasticity and damage evolution of a concrete core. Next, based on the UCCDP, a method of 3D nonlinear creep analysis and a corresponding numerical analysis method were established and implemented in the ABAQUS secondary platform. Finally, by comparing the predicted results with the experimental results, it was observed that the method proposed to predict the creep of axially loaded short CFST columns had satisfactory accuracy.
Molecular Mechanisms of Adiponectin-Induced Attenuation of Mechanical Stretch-Mediated Vascular Remodeling
Authors: Ghantous Crystal M. , Farhat Rima , Djouhri Laiche , Alashmar Sarah , Anlar Gulsen , Korashy Hesham M. , Agouni Abdelali , Zeidan Asad
Published: May 2020

Hypertension induces vascular hypertrophy, which changes blood vessels structurally and functionally, leading to reduced tissue perfusion and further hypertension. It is also associated with dysregulated levels of the circulating adipokines leptin and adiponectin (APN). Leptin is an obesity-associated hormone that promotes vascular smooth muscle cell (VSMC) hypertrophy. APN is a cardioprotective hormone that has been shown to attenuate hypertrophic cardiomyopathy. In this study, we investigated the molecular mechanisms of hypertension-induced VSMC remodeling and the involvement of leptin and APN in this process. To mimic hypertension, the rat portal vein (RPV) was mechanically stretched, and the protective effects of APN on mechanical stretch-induced vascular remodeling and the molecular mechanisms involved were examined by using 10 μg/ml APN. Mechanically stretching the RPV significantly decreased APN protein expression after 24 hours and APN mRNA expression in a time-dependent manner in VSMCs. The mRNA expression of the APN receptors AdipoR1, AdipoR2, and T-cadherin significantly increased after 15 hours of stretch. The ratio of APN/leptin expression in VSMCs significantly decreased after 24 hours of mechanical stretch. Stretching the RPV for 3 days increased the weight and [3H]-leucine incorporation significantly, whereas APN significantly reduced hypertrophy in mechanically stretched vessels. Stretching the RPV for 10 minutes significantly decreased phosphorylation of LKB1, AMPK, and eNOS, while APN significantly increased p-LKB1, p-AMPK, and p-eNOS in stretched vessels. Mechanical stretch significantly increased p-ERK1/2 after 10 minutes, whereas APN significantly reduced stretch-induced ERK1/2 phosphorylation. Stretching the RPV also significantly increased ROS generation after 1 hour, whereas APN significantly decreased mechanical stretch-induced ROS production. Exogenous leptin (3.1 nM) markedly increased GATA-4 nuclear translocation in VSMCs, whereas APN significantly attenuated leptin-induced GATA-4 nuclear translocation. Our results decipher molecular mechanisms of APN-induced attenuation of mechanical stretch-mediated vascular hypertrophy, with the promising potential of ultimately translating this protective hormone into the clinic.
Taurine Attenuates Carcinogenicity in Ulcerative Colitis-Colorectal Cancer Mouse Model
Authors: Wang Guifeng , Ma Ning , He Feng , Kawanishi Shosuke , Kobayashi Hatasu , Oikawa Shinji , Murata Mariko
Published: May 2020

Taurine (2-aminoethane-sulfonic acid) is a type of amino acids and has numerous physiological and therapeutic functions, including anti-inflammation. However, there are few studies on the anticancer action of taurine. Our previous studies have demonstrated that taurine exhibits an apoptosis-inducing effect on human nasopharyngeal carcinoma cells in vitro. In this study, we have investigated whether taurine has an anticancer effect, using azoxymethane (AOM)/sulfate sodium (DSS)- induced mouse model for colon carcinogenesis. All mice, except those in control group, received a single intraperitoneal injection of AOM and DSS in the drinking water for 7 days twice, with 1-week interval. After the first DSS treatment, mice were given distilled water (model group) or taurine in the drinking water (taurine group) ad libitum. No tumor was observed in the control group. Taurine significantly suppressed AOM+DSS-induced tumor formation. Histopathological examination revealed AOM/DSS treatment induced colon cancer in all mice (8/8, 100%), and taurine significantly inhibited the progression of colon cancer (4/9, 44.4%). Taurine significantly attenuated cell proliferation in cancer tissues detected by Ki-67 staining. Taurine significantly increased the levels of an apoptosis marker cleaved caspase-9 and tumor suppressor protein PTEN. This is the first study that demonstrated that taurine significantly reduced carcinogenicity in vivo using AOM/DSS-induced colon cancer mouse model.
Quercetin Suppresses AOM/DSS-Induced Colon Carcinogenesis through Its Anti-Inflammation Effects in Mice
Authors: Lin Rui , Piao Meiyu , Song Yan , Liu Chunyan
Published: May 2020

Colorectal cancer (CRC) is the fourth leading cause of tumor-related deaths worldwide. In this study, we explored the in vivo effects of quercetin, a plant flavonol from the flavonoid group of polyphenols with antioxidant effects, on colon carcinogenesis induced by azoxymethane/dextran sodium sulfate (AOM/DSS). Thirty mice were randomly assigned into three groups: the control group, the AOM/DSS group, and the quercetin+AOM/DSS group. CRC was induced by AOM injection and a solution of 2% DSS in the drinking water. In the AOM/DSS-induced colon cancer mice model, quercetin treatment dramatically reduced the number and size of colon tumors. In addition, quercetin significantly restored the leukocyte counts by decreasing the inflammation caused by AOM/DSS. We also observed that the expression of oxidative stress markers, such as lipid peroxide (LPO), nitric oxide (NO), superoxide dismutase (SOD), glucose-6-phosphate (G6PD), and glutathione (GSH), could be reduced by quercetin, suggesting that the anti-inflammatory function of quercetin comes from its antioxidant effect. Moreover, potential biomarkers were identified with serum metabolite profiling. Increased levels of 2-hydroxybutyrate, 2-aminobutyrate, and 2-oxobutyrate and decreased levels of gentian violet, indole-3-methyl acetate, N-acetyl-5-hydroxytryptamine, indoxyl sulfate, and indoxyl were also found in the AOM/DSS-treated mice. However, quercetin treatment successfully decreased the levels of 2-hydroxybutyrate, 2-aminobutyrate, 2-oxobutyrate, endocannabinoids, and sphinganine and increased the levels of gentian violet, N-acetyl-5-hydroxytryptamine, indoxyl sulfate, and indoxyl. Together, our data demonstrated that quercetin could maintain relatively potent antitumor activities against colorectal cancer in vivo through its anti-inflammation effect.
Synthetic High-density Lipoprotein Nanodiscs for Personalized Immunotherapy Against Gliomas
Authors: Scheetz Lindsay , Kadiyala Padma , Sun Xiaoqi , Son Sejin , Hassani Najafabadi Alireza , Aikins Marisa , Lowenstein Pedro R. , Schwendeman Anna , Castro Maria G. , Moon James J.
Published: May 2020

Purpose:

Gliomas are brain tumors with dismal prognoses. The standard-of-care treatments for gliomas include surgical resection, radiation, and temozolomide administration; however, they have been ineffective in providing significant increases in median survival. Antigen-specific cancer vaccines and immune checkpoint blockade may provide promising immunotherapeutic approaches for gliomas.

Experimental Design:

We have developed immunotherapy delivery vehicles based on synthetic high-density lipoprotein (sHDL) loaded with CpG, a Toll-like receptor-9 agonist, and tumor-specific neoantigens to target gliomas and elicit immune-mediated tumor regression.

Results:

We demonstrate that vaccination with neoantigen peptide-sHDL/CpG cocktail in combination with anti–PD-L1 immune checkpoint blocker elicits robust neoantigen-specific T-cell responses against GL261 cells and eliminated established orthotopic GL261 glioma in 33% of mice. Mice remained tumor free upon tumor cell rechallenge in the contralateral hemisphere, indicating the development of immunologic memory. Moreover, in a genetically engineered murine model of orthotopic mutant IDH1 (mIDH1) glioma, sHDL vaccination with mIDH1 neoantigen eliminated glioma in 30% of animals and significantly extended the animal survival, demonstrating the versatility of our approach in multiple glioma models.

Conclusions:

Overall, our strategy provides a general roadmap for combination immunotherapy against gliomas and other cancer types.
Depth image correction for intel realsense depth camera
Authors: Park Hyun Jun , Kim Kwang Baek
Published: May 2020

Intel RealSense depth camera provides depth image using infrared projector and infrared camera. Using infrared radiation makes it possible to measure the depth with high accuracy, but the shadow of infrared radiation makes depth unmeasured regions. Intel RealSense SDK provides a postprocessing algorithm to correct it. However, this algorithm is not enough to be used and needs to be improved. Therefore, we propose a method to correct the depth image using image processing techniques. The proposed method corrects the depth using the adjacent depth information. Experimental results showed that the proposed method corrects the depth image more accurately than the Intel RealSense SDK.
Risk assessment optimization for decision support using intelligent model based on fuzzy inference renewable rules
Authors: Merhej Radhi Abdulkareem
Published: May 2020

Due to the unreliability of wired communications and the risks of controlling the process of transmitting data besides the complications that affecting data protection and the high costs of systems infrastructure, led to use wireless communications instead of wires media, but these networks are vulnerable towards illegal attacks. The side effects of these attacks are modifying data or penetrate the security system and discover its weaknesses, which leads to great material losses. These risks and difficulties led to the reluctance of wires communications and propose intelligent techniques and robust encryption algorithms for preventing data transmitted over wireless networks to keep it safe from cyber security attacks. So, there is a persistent need for providing intelligent techniques and robust algorithms to preserve conveyed information using wireless network. This paper introduces scenario for proposing intelligent technique to increase data reliability and provides a new way to improve high level of protection besides reduces infrastructure cost. The proposed system relies on two models, where the first model based on producing a knowledge base of risk rules while the aim of the second module is a risk assessment outcomes and encryption process according to attacks type. In this system, reducing risks levels based on renewable rules whereas a novel security system established on non-periodic keys with unsystematic operations using fuzzy system. We concluded that the proposed system has the ability to protect the transmitted data, increases its reliability and reduce the potential risks. MATLAB Toolkit 2014 then Weka open source package was used in encryption and data mining for the proposed system.<iframe class="ginger-extension-definitionpopup" style="left: -91.5px; top: -78px; z-index: 100001; display: none;" src="chrome-extension://kdfieneakcjfaiglcfcgkidlkmlijjnh/content/popups/definitionPopup/index.html?title=Abstract&description=a%20concept%20or%20idea%20not%20associated%20with%20any%20specific%20instance">
By using a new iterative method to the generalized system Zakharov-Kuznetsov and estimate the best parameters via applied the pso algorithm
Authors: Aldabagh Abeer
Published: May 2020

In this paper, a new iterative method was applied to the Zakharov-Kuznetsov system to obtain the approximate solution and the results were close to the exact solution, A new technique has been proposed to reach the lowest possible error, and the closest accurate solution to the numerical method is to link the numerical method with the pso algorithm which is denoted by the symbol (NIM-PSO). The results of the proposed Technique showed that they are highly efficient and very close to the exact solution, and they are also of excellent effectiveness for treating partial differential equation systems.
Electrochemical properties of kenaf-derived activated carbon electrodes under different activation time durations for supercapacitor application
Authors: Abdul Razak Muhammad Nizam , Ahmad Noorden Zulkarnain , Ani Farid Nasir , Abdul Malek Zulkurnain , Jamian Jasrul Jamani , Bashir Nouruddeen
Published: May 2020

The electrochemical properties of supercapacitors with kenaf-derived activated carbon electrodes under different activation time durations were evaluated. The study aims to determine the optimum activation time required that contributes to highest supercapacitor’s perfomance. Kenaf fibre was firstly carbonized at 400 °C to remove its water content and any volatile substances. The resulted kenaf-derived carbon was then impregnated in potassium hydroxide (KOH) with 4:1 impregnation ratio and left overnight. After the impregnation process, the carbon sample was activated at 600 °C with different heating time durations of 1, 2, 3 and 4 hours and named as A600-1, A600-2, A600-3 and A600-4, repectively. Four supercapacitors with the kenaf-derived activated carbon samples as the electrodes were fabricated based on two-electrode symmetrical test cell system. Specific capacitances of 108, 189, 242, and 126 F/g for supercapacitors with activated carbon A600-1, A600-2, A600-3 and A600-4 electrodes, respectively were achieved. These were much higher than previously reported values of only up to 37 F/g. The finding suggests that an inexpensive fibrous carbon material derived from kenaf by a facile pyrolysis process may be a remarkable choice to construct high performance supercapacitor.
Significance of electrodermal activity response in children with autism spectrum disorder
Authors: Gul Airij Awais , Sudirman Rubita , Ullah Sheikh Usman , Khuan Lee Yoot , Zakaria Nor Aini
Published: May 2020

The human Autonomic Nervous System (ANS) controls the body’s physiological responses such as heart rate, electrodermal activity, temperature, and pupil diameter. The physiological responses are increased in the presence of a stressing stimuli and this is a typical ANS response. However, in case of children with Autism Spectrum Disorder (ASD), they suffer from autonomic dysregulation as reported in past owing to their atypical ANS response. This study investigated the ANS response of children with ASD and compares it with the response of normal children. EDA response datasets of 35 children with ASD and 55 normal children were acquired with the help of E4 wristband at a sampling rate of 4Hz. The signals were preprocessed to remove artefacts and noise and later compared. Furthermore, an SVM classifier was also used to classify the EDA response signals of normal children and children with ASD. The obtained results highlight that the ANS response of children with ASD is atypical as their EDA response is blunt and shows no significant tonic and phasic changes in EDA levels in the presence of stressing stimuli. In addition to that, an accuracy of 75% was obtained using the LF kernel of SVM classifier. The study further unfolds the hypoactive sympathetic response of children with ASD during a stressing event. Furthermore, this will help in future to anticipate the emotional responses of children with ASD such as anger, happiness, and anxiety.
Hybrid control strategies of SVC for reactive power compensation
Authors: Sh. Aziz Mothanna , G. Abdullah Ahmed
Published: May 2020

This article shows a prospective utilizations of flexible AC transmission system (FACTS) controls, like the static VAR compensator (SVC). One of the major motives for setting up an SVC is to recover dynamic voltage controller and thus increase system load aptitude. Static VAR compensator system proposed in this work consists of thyristor switched capacitor and thyristor controlled reactor sets, this style of SVC modelled using MATLAB simulink toolbox. A hybrid genetic algorithm with PI and fuzzy logic controls that used to control and expand the grid performance of the power system. The model results reveal that the Static Var Compensation contribute a decent result in upholding bus voltage after the power network is in an active and steady moment, besides it has a capability of the constancy control. It can totally work as a significant plan of reactive power recompense in power networks. 
A two stage battery charger for EV charging applications
Authors: Kalyanasundaram V. , Fernandez George S , Vijayakumar K. , Vidyasagar S.
Published: May 2020

Electric power generation and consumption are indicating an unprecedented change in recent decades. Electrical power industry and transportation sector lie at the core of this development and hence this change. This change is one of the major causes of polluting environmental and global warming. So, to decrease the dependency on conventional fuels and greenhouse gas emissions, countries around the globe are actively finding alternative energy resources. It will help to develop clean and green energies to build a sustainable society. Simultaneously, energy utilization in the field of transportation is witnessing a change from fossil fuel to electricity-based fuel. Electrified transportation system is a solution to endorse sustainable energy development and addressing environmental pollution, global warming issues. In this paper, an EV battery charger is designed with a two-stage charging model to achieve good efficiency. The design is simulated by using MATLAB simulation and compared with the existing model. The simulation results show that the proposed model is superior to the traditional model.
Voltage sag compensation using direct converter based DVR by modulating the error signal
Authors: Rahman S. Abdul , Dagnew Estifanos
Published: May 2020

The aim of this paper is to present a modulation technique to achieve highest voltage sag compensation using direct converter based dynamic voltage restorer (DVR). The DVR topology proposed in this paper, has a direct converter and a series transformer. The direct converter is fabricated using only two bi-directional switches. The DVR is designed to compensate the sag in a phase by taking power from the same phase. The direct converter is connected between the series transformer and the line in which sag compensation is to be achieved. Conventionally, the PWM pulses for the direct converters are produced by comparing the error signal with the carrier signal. The error signal is obtained by comparing the amplitude of voltage in the line with the amplitude of the reference voltage. If the amplitude of the carrier signal is kept constant and the actual amplitude of error signal is used for PWM generation, it is possible to achieve only 22% of voltage sag compensation. But if the error signal amplitude is modulated according to the amplitude of existing voltage sag in the line, 52% of the voltage sag can be compensated with the THD less than 5%. Simulation results are presented for validating the analysis. 
Superconductor fault current limiter effect on the performance of doubly-fed induction generators
Authors: Mohammadi Farzaneh , Molaei Mohammad
Published: May 2020

Between different wind turbine-generator configurations, one of the most accepted and highly regarded structures in the industry is the wind turbine with doubly-fed induction generator. The DFIG wind turbines are very sensitive to grid disturbances especially to voltage drop during grid faults due to relatively low power of the power converters. Fault in a power system causes voltage drop, current increase in stator and rotor coils, and over voltage in the DC shin. Several control methods have been proposed so far. A model based on power electronic instruments and superconductor theory, superconductor fault current limiter (SCFCL), has been proposed in this paper to improve domain and the attenuation time of the parameters under control such as voltage, current, and speed and voltage of the DC link against various types of faults (single-phase, two-phase, and three-phase). In addition to this, in order to compare the results with convectional models (crowbar) and study the innovation of the proposed model, a simulation of the system under two-phase fault and use of crowbar method to control the fault has been conducted using MATLAB-SIMULINK and also, the performance of the proposed method has been assessed. 
An empirical correlation of ambient temperature impact on PV module considering natural convection
Authors: Jadu Ali Kamil , Hasan Mohammad Ahmed , Thiab Hasan Ghanim
Published: May 2020

In this paper, the effect of the ambient temperature on the PV modules for different angles of inclinations and different intensities of the solar radiation on the surface of the PV module is considered by using empirical correlations for natural convection. An analytical model based on the energy balance equilibrium between the PV module and the environment conditions has been used. Also an expression for calculating the electric power of silicon PV modules in a function of the ambient temperature, the intensity of the solar radiation, the incident angle of the solar radiation to the surface of the PV module and the efficiency of the PV modules at STC conditions have been used. By comparing the obtained both results, it can be seen that the largest deviation between the power values obtained by the analytical model and expression is about (5 %). The results obtained indicates that in the case of a small number of PV modules corresponding to the required number for an average household, it is more economical to invest additional resources in increasing the PV module's surface area than in case of the PV module with sun tracking system. 
Design and simulation of a microgrid for TIH campus
Authors: Ali Zaid H. , Saleh Ziyaad H. , Daoud Raid W. , Ahmed Ahmed H.
Published: May 2020

This paper proposes a methodology for designing and operating a microgrid (MG) for the main campus of the Technical Institution Hawija. In this MG, a battery energy storage system (BESS), photovoltaic (PV) generation system, and controllable loads are included. Due to the high penetration of the PVs, over-voltage issues may occur in this MG. A novel operation strategy is considered by coordinating the BESS, PVs, and loads to prevent power outages and accomplish a secure operation of this MG. In this proposed approach, droop controllers have been implemented to provide the appropriate references for the PVs and BESS to maintain the voltage of the MG within a secure range. The generation of the PVs may be curtailed to guarantee the fidelity of the voltage. The intended simulations will be based on MATLAB/Simulink to show the efficacy of the intended design.
End-to-end performance of DF multihop hybrid RF/FSO system using MPPM coding and MIMO technique under dependent GG turbulence channels
Authors: Saidi Hechmi , Hamdi Noureddine
Published: May 2020

The paper presents a BER analysis for hybrid Radio Frequency/multihop Free Space Optics, known as RF/FSO, communication system benefiting from Multiple Input Multiple Output (MIMO) configuration but impaired by Gamma-Gamma, known as GG, turbulence. Authors deploy Multiple Pulse Position Modulation, known as M-PPM, like a signaling technique. Furthermore, the exact as well as approximated amounts of Symbol-Error Rates, known as SERs, are both judged in this work. A closed form formula related to the whole Probability Density Function, called PDF, for our designed system is derived. Such interesting approach provides to us better quality of service by combating atmospheric turbulence.
Power minimization of WBSN using adaptive routing protocoL
Authors: Sabeeh Hmoud Altamimi Ammar , Raad K. Al-Dulaimi Omar , A. Mahawish Amar , Hashim M. M. , S. T. Mustafa
Published: May 2020

The present work was an attempt to address a challenge of energy utilization or consumption in WBSN, it used a proposed routing algorithm based on ant optimization technique to distribute energy utilization efficiently on nodes. Thus reducing consumed energy and extending the life cycle of nodes, as well as avoiding damages might be occurred in tissues of patient`s body. At the beginning the proposed protocol was compared with conventional routing protocol LEACH to prove it`s efficiency in the extending of the life cycle of node, then it was used with experimental network was employed to examine energy utilizations. The obtained results were compared with others attained by conventional and developed routing protocols, there was considerable minimizing in the energy consumption that proved efficiency of proposed algorithm.
Enhanced routing for secured ad-hoc network
Authors: Kumaran U , Ramachandran A , Jegan J , Subramanian E.K.
Published: May 2020

A self-configured network forming an arbitrary topology of mobile routers through wireless connection is commonly referred as MANET (mobile ad-hoc network).  Random movement of routers allows the network to organize arbitrarily hence rapid unpredictable changes may occur in the topology of the wireless network. When there is no possibility of setting up permanent networks, MANETs are set up for carrying out the operations temporarily. As there is no fixed frame for this system, usage of available resources for reliable communication is a great challenge for MANETs. The nodes participating in packet routing in ad-hoc networks faces security issues such as maintaining the confidentiality of the packets, integration, availability of the network to meet the traffic, requirement of authentication for reliable data communication etc. Dropping of packets maliciously in an attack is known as black hole attack.An attempt is made in this paper to detect dynamically using the security of cross layer called as honeypot and classify the mechanisms to understand the strengths & threats of the protocols used for routing to suggest a concrete solution for the problems related to the mobile ad-hoc networks. The methodology of honeypot detects and isolates the attacks of the black hole. The results prove better delivery of packets with decreased load of the network.
Heuristic evaluation on mobile halal detection application
Authors: Ridwan Ahmad Hasan , Safrudin Irfan , Ali Ramdhani Muhammad , Ramdania Diena Rauda
Published: May 2020

As a country with the largest Muslim population in the world, the halal status of a food and beverage product is essential for the people of Indonesia. An application was created by the government to answer these concerns with the name "Halal MUI". Unfortunately, this application has not been able to meet the needs of users to get a rating of 3.5 out of 920 users. This study aims to provide an evaluation of the Halal MUI application by using a heuristic evaluation approach. As many as three experts did a personal heuristic evaluation, then summarized it in a group discussion forum. The results showed that the application of Halal MUI, in general, has been able to check the halal product. However, some features still have a high severity rating. This paper presents several suggested improvements to improve system usability in Halal MUI applications.
Por uma epistemologia da gambiarra: invenção, complexidade e paradoxo nos objetos técnicos digitais
Authors: Messias José , Mussa Ivan
Published: May 2020

Associando processos de constituição de objetos técnicos digitais ao conceito de gambiarra, busca-se revelar os modos de existência que tornam a gambiarra um operador fundamental às relações entre técnica, corpo e sociedade. As dimensões estéticas, políticas e cognitivas do conceito compõem uma vertente alternativa da tecnicidade que permite elucidar o caráter complexo e muitas vezes paradoxal das formações sociotécnicas digitais. A demonstração empírica dessas ideias se dará em três níveis: o redirecionamento das capacidades de processamento de consoles de video games e placas de vídeo; as reconfigurações do software e das interfaces gráficas; e a consequente invenção de ritmos e formas de ver, sentir e agir nos video games.
Dialética do engajamento: uma contribuição crítica ao conceito
Authors: Bastos Pablo Nabarrete
Published: May 2020

O objetivo deste artigo ensaístico é contribuir com uma compreensão dialética, crítica e marxiana do conceito de engajamento, aqui localizado e concebido como parte da totalidade. Nossa argumentação, baseada em pesquisa bibliográfica não sistemática, parte dialeticamente da concepção hegemônica sobre engajamento, confrontando-a na perspectiva da totalidade com vistas à sua superação. A compreensão que desenvolvemos nos possibilita fazer a mediação entre o debate epistemológico contemporâneo em ciências da comunicação, com foco nas discussões sobre interações midiatizadas, e a teoria filosófica e política marxiana.
Entre a greve e o locaute: os ethè em disputa pelo lugar de verdade nas cenografias ideológicas que paralisaram o Brasil
Authors: Antunes Junior Fernando Simões , Freitas Ernani Cesar de
Published: May 2020

A paralisação dos rodoviários no Brasil em 2018 colocou em disputa forças ideológicas que usam o medo para se perpetuarem no imaginário. Neste artigo, daremos ênfase a notícias que caracterizaram a paralisação como um locaute, em contraposição ao cenário de greve pretendido pela categoria. O objetivo é analisar o discurso midiático que favoreceu uma cenografia pretendida pelo governo. Como aporte teórico, são mobilizados estudos sobre formação de crença, de Bateson; emoções, de Damásio e Ekman; ideologia da desconexão, de Taylor; e semiologia, do círculo de Bakhtin. O marco teórico de análise do discurso é o da escola francesa, de Dominique Maingueneau. A pesquisa é do tipo exploratório, bibliográfica, com abordagem qualitativa.
Para pensar comunicação, cultura e subjetividade: uma perspectiva de análise
Authors: Gonçalves Márcio Souza
Published: May 2020

O presente texto procura fazer uma síntese da perspectiva que defendemos para a análise das relações entre comunicação, cultura e subjetividade. Trata-se, nos três âmbitos, de evitar o que nomeamos de paradigma epocalista, em favor de abordagens localizadas e atentas às diferenças. Nossa perspectiva envolve, em primeiro lugar, evitar uma visão classificatória das subjetividades. Além disso, evita-se a redução da história das culturas a uma sucessão linear de épocas. Finalmente, evita-se, do mesmo modo, tanto o determinismo tecnológico quanto a ideia de um usuário onipotente, o que implica considerar tanto as agências das tecnologias quanto as ações dos usuários tomados individual ou coletivamente.
Explicando o Consumo Colaborativo por meio da Teoria da Ação Racional
Authors: Farias Miriam Leite , Barbosa Maria De Lourdes de Azevedo , Silva Luana Alexandre , Sousa Júnior João Henriques de
Published: May 2020

O fenômeno do Consumo Colaborativo tem ganhado notoriedade no espaço mercadológico mundial, mas ainda é incipiente dentro da literatura acadêmica. A partir desta constatação, o presente artigo objetivou verificar a aplicabilidade do modelo da Teoria da Ação Racional no contexto do Consumo Colaborativo. Para tanto, foi realizada uma pesquisa de caráter quantitativo, aplicando-se um survey com 208 usuários dos serviços da plataforma de hospedagem do Airbnb no Brasil. Por meio de análise de regressão linear múltipla, os resultados indicaram que as atitudes relativas ao comportamento e a norma subjetiva dos consumidores influenciam positivamente na intenção de uso dos serviços do Airbnb. Dessa forma, o estudo apresenta evidências de que a utilização da Teoria da Ação Racional é válida no contexto do consumo colaborativo, contribuindo para o entendimento teórico desse tema com relação ao comportamento dos consumidores turistas.
La Competitividad del Turismo MICE en Galicia
Authors: Soares Jakson Renner Rodrigues , Gabriel Larissa Paola Macedo Castro , Perinotto André Riani Costa
Published: May 2020

El segmento MICE se refiere al turismo de reuniones, incentivos, congresos y exposiciones. Su actividad se ha convertido en un importante elemento dinamizador de todo tipo de enclaves con vocación turística, actuando con carácter desestacionalizador, aumentando la demanda de servicios de gama alta y también el gasto medio del visitante. Catalunya y Madrid están entre las principales referencias para este segmento en el mundo, aumentando a cada año su aportación en el sector MICE. Galicia, por la contra, viene disminuyendo su presencia en este mercado. Esta investigación consiste en un análisis comparativo entre estos tres destinos, buscando identificar las debilidades de Galicia con relación a los otros dos destinos cercanos. Se realizó un estudio descriptivo del segmento MICE en los tres territorios utilizando como método de análisis el Sistema Interfuncional Integrado de la Competitividad (SIIC), una metodología de análisis de las ventajas competitivas del destino turístico. Como principales resultados se identificó que en Galicia tanto el sector público como el privado tienen una escasa repercusión en la planificación de este segmento. Además, aunque se note interés por parte de los stakeholders turísticos, en Galicia aún no hay una política persistente para desarrollar este mercado. Se pretende con esta investigación generar comparaciones que suministre al segmento MICE indicadores capaces de mejorar el análisis de la competitividad de los destinos.
Experimentações Institucionais no Museu de Arte Contemporânea de Barcelona (MACBA) e seus diretores
Authors: Marziale Nicole
Published: May 2020

Neste artigo, realiza-se uma contextualização acerca da concepção do Museu de Arte Contemporânea de Barcelona (MACBA), enfatizando-se a gestão de Manuel Borja-Villel (1998-2008) como diretor, em que foram realizadas experimentações institucionais que visaram a aproximar o Museu, a cidade e a comunidade. Em seguida, é analisada a gestão de seu sucessor, Bartomeu Marí (2008-2015), a fim de verificarmos, a respeito da construção de uma “cultura institucional”, a proposição dessas experimentações institucionais no museu. Avalia-se, por um lado, a possibilidade de que a sustentação de proposições desse tipo esteja ancorada em figuras de diretores específicos. De outro, cabe questionarmos se as estruturas internas à instituição poderiam determinar e cercear a autonomia dos diretores em casos de eventuais conflitos de interesses.
Do cartaz ao mural
Authors: Freitas Patrícia Martins Santos
Published: May 2020

Este artigo aborda a trajetória do artista italiano Bramante Buffoni e sua importância para a compreensão das artes aplicadas como signo da modernidade no Brasil. Buffoni chegou em São Paulo em 1953, onde trabalhou com diversos agentes importantes do ambiente cultural paulistano, como Pietro Maria Bardi e Francisco Matarazzo Sobrinho. O artista atuou de maneira ampla, com diversos meios e técnicas, desde a linguagem gráfica dos cartazes até o campo da decoração de interiores. A presença da obra de Buffoni no acervo moderno do Museu de Arte Contemporânea da Universidade de São Paulo nos propõe o entendimento dessa coleção a partir de uma renovada abordagem, que seja ampla e inclua uma gama expandida de objetos de arte.
Merda de artista para além da iconoclastia
Authors: Vidal Junior Icaro Ferraz
Published: May 2020

O presente artigo propõe um aprofundamento da crítica de Merda de artista (1961), de Piero Manzoni. Com o intuito de nos afastarmos da hipertrofia do aspecto iconoclasta atribuído à obra por parcelas substanciais da crítica, contextualizamos a edição a partir de sua relação com outras obras do artista e com a poética de importantes intercessores, notadamente, Yves Klein e Marcel Duchamp. Questões relacionadas às articulações entre experiência estética e economia política e à clivagem entre a obra de Manzoni e o informalismo foram mobilizadas na construção de um solo a partir do qual as teses de Germano Celant sobre o artista pudessem ser tensionadas e os fundamentos culturais que perpassam a recepção de Merda de artista pudessem ser vislumbrados.
A conjuração dos mortos
Authors: Sartorelli Alberto José Colosso
Published: May 2020

Ainda seguindo os paradigmas da forma da pintura histórica, David se utilizou dos feitos da Antiguidade Clássica não só como orientação moral, mas como posicionamento político e orientação prática na então emergente revolução iniciada na França. Os litores trazendo a Brutus os corpos de seus filhos (1789) é um exemplo de caráter republicano por excelência e, por isso, também de ação revolucionária no contexto da monarquia. Após a Revolução, David pintou Marat assassinado (1793), obra em que, valendo-se da forma da pintura histórica, retratou um personagem e um tema da história contemporânea. Finalmente a França, agora republicana, era digna de ser representada em uma pintura histórica.
Art History and Other Stories
Authors: Berthoud Luiza Esper
Published: May 2020

Through the analysis of one erroneous piece of art criticism, an essay by Goethe that re-imagines a lost ancient sculpture, I demonstrate the difficulty that the discipline of art history has with conceptualizing the experience of art making and how one ought to respond to it. I re-examine the relationship between art making and art appreciation informed by ideas such as the Aristotelian view of Poiesis, Iris Murdoch’s praise of art in an unreligious age, and Giorgio Agamben’s call for the unity between poetry and philosophy. I also argue that much of modern art criticism has forgotten Arts’ earlier conceptual vocation, and propose methods of appreciating art that are in themselves artistic.