Miracle-dz/UniFAR-FTUs huggingface dataset:
Aeroelastic Response of Airfoils Accounting for Synthetic Jet Actuation: Modeling and Comparison of CFD and Reduced Order Models

Two-dimensional incompressible turbulent simulations of a synthetic jet actuator on a NACA 0012 airfoil experiencing a 1-degree-of-freedom pitching aeroelastic motion, are performed by means of the Reynolds-Averaged Navier-Stokes (RANS) equations solved in a commercial CFD code. Turbulence is modeled through the k-! shear stress transport (SST) turbulence model. Dynamic airfoil validations are performed for a forced pitching motion about a 0deg mean angle of attack, the oscillations having an amplitude of ±2deg and reduced pitching frequencies of k = 0.2 and k = 0.4. CFD computations are compared to the theoretical Theodorsen and Indicial Models, and to the results obtained through the Panel method. A reduced-order-model for the airfoil with a synthetic jet is proposed and validated with the results from the CFD calculations on a static airfoil at 2deg angle of attack. Validation of RANS k-! SST aeroelastic model is performed by comparing the response of the system to the Indicial Model by angular position. Preliminary results conclude that at velocities beyond the flutter speed the SJA limits the magnitude of the aeroelastic response and provides a small amount of aerodynamic damping. SJA does not greatly aect the frequency of the ”controlled” system, which implies the possibility for a simple and eective control system.
Design of a UWB wide‐slot antenna with 5.2‐/5.8‐GHz dual notched bands using modified electromagnetic band‐gap structures

In this article, a novel ultra‐wideband (UWB) wide‐slot antenna with dual band‐notched characteristics is proposed. The original UWB antenna is composed of a fork‐shaped feed structure and a ground plane with a quasi‐semicircular slot. The 5.2‐/5.8‐GHz wireless local area network notched bands are realized by the introduction of modified mushroom‐type semicircular electromagnetic band‐gap structures. The antenna is etched on a 35 × 35 mm2 substrate. The measured results show that the proposed antenna achieves a wide impedance bandwidth (VSWR < 2) from 2.73 to over 12 GHz with dual notched bands (VSWR > 2) covering 4.55–5.46 GHz and 5.68–6.35 GHz successfully. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1069–1075, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26672
Flow Calibration and Error Analysis of Dual-Axis Tracking Trough Solar Collector System

In this paper, a dual-axis tracking trough solar collector system is established, and used to measure and calibrate flow rate at different conditions by using the ultrasonic flow meter and mass flow meter, providing important reference for follow-up experimental study. With the changing of the medium’s temperature and the rotation speed variation of the pump, the two flow meters were used to work together to measure the accurate flow measurements, obtaining the measurement error of the mass flow meter. After that, the reason of error and methods used to reduce the error are analyzed.
Factors Affecting the Earnings Management: The Case of Listed Firms in Vietnam

Research purpose: This study identifies factors affecting earnings management in the case of listed firms in Vietnam. Six factors, which include the number of management board members, the duality relationship chairman-director, auditor size, financial performance, firm size and financial leverage, are examined. Research motivation: Earnings management greatly affects the interests of shareholders in specific and the company in general. It erodes investor confidence in the stock market. Moreover, the goal set by the Government and the Ministry of Finance to "protect investors" is also not achieved. Among the published earnings management literature, there are few recent studies that examine the possible effects of earnings management technique on the developing market, determining whether earnings management occurs and whether there is an incentive to manipulate earnings. The research is motivated by the question of which factors affecting earnings management specifically in Vietnam. Research design, approach and method: Data of 147 manufacturing firms listed on Ho Chi Minh Stock Exchange from 2017 to 2019 is extracted from Finnpro platform, resulting in 441 firm-year observations. Panel data is processed using model of Jones (1991) and the hypothesis is tested using regression model with Eviews program. Main findings: The results show that two factors which are the duality relationship chairman-director and financial leverage have positive effects on earnings management. In contrast, two factors including the number of members in board of management and auditor size are negatively related to earnings management, while financial performance and firm size are not determinants of earnings managements. Practical/managerial implications: This study provides more evidence regarding earnings management and proposes some recommendations and implications to stakeholders about the transparency and quality of financial reporting. For example, companies should strengthen better corporate governance mechanisms; investors need to equip themselves with knowledge of accounting, financial analysis, and earnings management; and State agency should develop a roadmap for the "Investor Protection Law” to reduce the earnings manipulation behaviors.
Effects of Posttrial Antihypertensive Drugs on Morbidity and Mortality: Findings from 15-Year Passive Follow-Up after ALLHAT Ended

Background Antihypertensive and Lipid-Lowering Treatment to Prevent Heart Attack Trial (ALLHAT) ended in 2002, but it is important to study its long-term outcomes during the posttrial period by incorporating posttrial antihypertensive medication uses in the analysis. Purposes The primary aim is to explore the patterns of antihypertensive medication use during the posttrial period from Medicare Part-D data over the 11-year period from 2007 to 2017. The secondary aim is to examine the potential effects of these posttrial antihypertensive medications on the observed mortality and morbidity benefits. Methods This is a posttrial passive follow-up study of ALLHAT participants in 567 US centers in 1994–1998 with the last date of active in-trial follow-up on March 31, 2002, by linking with their Medicare and National Death Index data through 2017 among 8,007 subjects receiving antihypertensive drugs (3,637 for chlorthalidone, 2,189 for amlodipine, and 2,181 for lisinopril). Outcomes included posttrial antihypertensive drug use, all-cause mortality, and cardiovascular disease (CVD) mortality. Results Of 8007 subjects, 3,637 participants were initially randomized to diuretic (chlorthalidone). The majority (67.9%) of them still received diuretics in 2007, and 52.7%, 47.2%, and 44.0% received β-blockers, angiotensin-converting enzyme (ACE) inhibitors, and calcium channel blockers (CCBs), respectively. Compared to participants who received diuretic-based antihypertensives, those who received CCB had a nonsignificantly higher risk of all-cause mortality (1.17, 0.99–1.37), whereas those who received ACE/ARB (angiotensin receptor blockers) had a significantly higher risk of all-cause mortality (1.26, 1.09–1.45). For the combined fatal or nonfatal hospitalized events, the risk of CVD was significantly higher in patients receiving CCB (1.30, 1.04–1.61) and ACE/ARB (1.49, 1.22–1.81) as compared to patients receiving diuretics. Conclusion After the conclusion of the ALLHAT, almost all patients switched to combination antihypertensive therapies, independently by the original drug class, and the combination therapies (mostly based on diuretics) reduced the incidence of major cardiovascular outcomes and mortality.
Water Supply Clusters by Multi-Agent Based Approach

The rational distribution of water in a water supply network (WSN) is a complex problem, especially for systems of large scale. Its complexity is continually increasing from the point of view of technical management. This represents a really important problem for water companies around the world that witness how the mathematical models of their networks are not accurate anymore and their engineering tools become obsolete. As a consequence, they do not have a clear vision of the balance between production and distribution, that is to say, between supply and demand. As a result, many companies worldwide, especially those managing big cities networks, are interested in new methods to improve the control and management of their networks, essentially to control leaks and to improve water quality. One of the methods that attracts great interest is division into DMA (district metered areas). The division of WSN into DMA is a partition of the supply network into subsystems with controlled inputs and outputs, building smaller independent networks. Due to the complexity of the problem, efficient techniques are required. In this contribution we use a multi-agent based approach that takes advantage of the distributed nature of water distribution systems. This methodology offers an adequate solution to DMA's paradigm through clusters that allows the conditions for these clusters to become small water supply networks.
Precarious Job Makes Me Withdraw? The Role of Job Insecurity and Negative Affect

An expanding “gig” economy has changed the nature of employment; thus, researchers have recently focused on exploring the role of job precariousness in the workplace. However, little research attention has been given to understanding why, how and when job precariousness leads to employees’ negative behavioral outcomes in the service-oriented industry. In the current study, we examined job insecurity as a mediator and employees’ negative affect as a moderator in the relationship between job precariousness and employees’ withdrawal behavior. Using a sample of 472 employees working in Chinese hotels, we found that job precariousness is positively related to employees’ withdrawal behavior by increasing their job insecurity. Moreover, this mediating relationship is conditional on the moderator variable of employees’ negative affect for the path from job insecurity to withdrawal behavior. The importance of these findings for understanding the undesirable behavior outcomes of job precariousness is discussed.
Design of stable microwave multidevice circuits with complex termination impedances

A criterion to check the conditional stability of linear active two‐port networks comprising more than one active device and terminated with complex impedances is presented. The proposed necessary and sufficient condition allows the guarantee of the stability in circular regions around the nominal terminations, thus providing circuit robustness with respect to load variations. © 2002 Wiley Periodicals, Inc. Int J RF and Microwave CAE 12: 360–360, 2002. Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mmce10033
RFID-based smart Kanbans for Just-In-Time manufacturing

This paper proposes a Just-In-Time (JIT) Wireless Manufacturing (WM) framework that is based on RFID (Radio Frequency Identification, RFID) technology and wireless information and communication networks. One of the basic components of this resulting WM solution is the RFID-based smart Kanbans. They are RFID tags and readers attached to shop-floor manufacturing objects such as operators, workstations, containers and inventories. Smart manufacturing objects are traceable to provide real-time information visibility needed for realising JIT manufacturing strategy. Smart Kanbans offer automatic data collection and thus close the manufacturing open loop.
A comparison of power output from linear and nonlinear kinetic energy harvesters using real vibration data

The design of vibration energy harvesters (VEHs) is highly dependent upon the characteristics of the environmental vibrations present in the intended application. VEHs can be linear resonant systems tuned to particular frequencies or nonlinear systems with either bistable operation or a Duffing-type response. This paper provides detailed vibration data from a range of applications, which has been made freely available for download through the Energy Harvesting Network’s online data repository. In particular, this research shows that simulation is essential in designing and selecting the most suitable vibration energy harvester for particular applications. This is illustrated through C-based simulations of different types of VEHs, using real vibration data from a diesel ferry engine, a combined heat and power pump, a petrol car engine and a helicopter. The analysis shows that a bistable energy harvester only has a higher output power than a linear or Duffing-type nonlinear energy harvester with the same Q-factor when it is subjected to white noise vibration. The analysis also indicates that piezoelectric transduction mechanisms are more suitable for bistable energy harvesters than electromagnetic transduction. Furthermore, the linear energy harvester has a higher output power compared to the Duffing-type nonlinear energy harvester with the same Q factor in most cases. The Duffing-type nonlinear energy harvester can generate more power than the linear energy harvester only when it is excited at vibrations with multiple peaks and the frequencies of these peaks are within its bandwidth. Through these new observations, this paper illustrates the importance of simulation in the design of energy harvesting systems, with particular emphasis on the need to incorporate real vibration data.
Associations between alcohol and liver enzymes are modified by coffee, cigarettes, and overweight in a Swedish female population

Abstract Purpose To examine whether positive associations between alcohol and liver enzymes were modified by coffee consumption, smoking, or weight status in a female population. Methods Regular consumption of beer, wine, and spirits was assessed in a representative cohort of 1462 Swedish women aged 38–60 in 1968, and re-assessed in 1974. In 1980, gamma-glutamyltransferase (GGT) and aspartase transaminase (AST) were measured in 1130 women. Exposures were averaged over values obtained in 1968 and 1974. Multivariable linear regression linked total ethanol intake to log-transformed enzyme values, including interactions by coffee, smoking, and overweight in mutually adjusted models. Results Coffee consumption significantly modified the association between ethanol intake and liver enzymes. One g/day higher ethanol intake was associated with 5.5 (3.5, 7.5)% higher values of GGT, and 1.2 (0.4, 2.1)% higher values of AST in women consuming 0–1 cups of coffee per day, while smaller or no effects were observed in women consuming ≥2 cups/day. Synergistic interactions were observed for ethanol and smoking, and for ethanol and overweight. Average alcohol-related effects on GGT in smokers and non-smokers were given by 3.8 (2.7, 4.9)% and 2.1 (0.9, 3.2)% per g ethanol/day, and by 0.9 (0.4, 1.4)% and 0.2 (−0.3, 0.7)% for AST. Similarly, in overweight women, 1 g/day higher ethanol intake was associated with 4.3 (3.0, 5.6)% higher GGT compared to 1.6 (0.7, 2.5)% in non-overweight women. Conclusions The results suggest that coffee consumption reduces the enzyme-raising effect of ethanol in the presence of synergistic interactions with smoking and overweight, specifically in women.
Empathic Responses of Behavioral-Synchronization in Human-Agent Interaction

: Artificial entities, such as virtual agents, have become more pervasive. Their long-term presence among humans requires the virtual agent’s ability to express appropriate emotions to elicit the necessary empathy from the users. Affective empathy involves behavioral mimicry, a synchronized co-movement between dyadic pairs. However, the characteristics of such synchrony between humans and virtual agents remain unclear in empathic interactions. Our study evaluates the participant’s behavioral synchronization when a virtual agent exhibits an emotional expression congruent with the emotional context through facial expressions, behavioral gestures, and voice. Participants viewed an emotion-eliciting video stimulus (negative or positive) with a virtual agent. The participants then conversed with the virtual agent about the video, such as how the participant felt about the content. The virtual agent expressed emotions congruent with the video or neutral emotion during the dialog. The participants’ facial expressions, such as the facial expressive intensity and facial muscle movement, were measured during the dialog using a camera. The results showed the participants’ significant behavioral synchronization (i.e., cosine similarity ≥ .05) in both the negative and positive emotion conditions, evident in the participant’s facial mimicry with the virtual agent. Additionally, the participants’ facial expressions, both movement and intensity, were significantly stronger in the emotional virtual agent than in the neutral virtual agent. In particular, we found that the facial muscle intensity of AU45 (Blink) is an effective index to assess the participant’s synchronization that differs by the individual’s empathic capability (low, mid, high). Based on the results, we suggest an appraisal criterion to provide empirical conditions to validate empathic interaction based on the facial expression measures.
A comprehensive study of neutral-point voltage balancing problem in three-level neutral-point-clamped voltage source PWM inverters

This paper explores the fundamental limitations of neutral-point voltage balancing problem for different loading conditions of three level voltage source inverters. A new model in DQ coordinate frame utilizing current switching functions is developed, as a means to investigate theoretical limitations and lend more intuitive insight into the problem. The low frequency ripple of the neutral point caused by certain loading conditions is observed and quantified.
Overexpression of TaSTT3b‐2B improves resistance to sharp eyespot and increases grain weight in wheat

Summary STAUROSPORINE AND TEMPERATURE SENSITIVE3 (STT3) is a catalytic subunit of oligosaccharyltransferase, which is important for asparagine‐linked glycosylation. Sharp eyespot, caused by the necrotrophic fungal pathogen Rhizoctonia cerealis, is a devastating disease of bread wheat. However, the molecular mechanisms underlying wheat defense against R. cerealis are still largely unclear. In this study, we identified TaSTT3a and TaSTT3b, two STT3 subunit genes from wheat and reported their functional roles in wheat defense against R. cerealis and increasing grain weight. The transcript abundance of TaSTT3b‐2B was associated with the degree of wheat resistance to R. cerealis and induced by both R. cerealis and exogenous jasmonic acid (JA). Overexpression of TaSTT3b‐2B significantly enhanced resistance to R. cerealis, grain weight, and JA content in transgenic wheat subjected to R. cerealis stress, while silencing of TaSTT3b‐2B compromised resistance of wheat to R. cerealis. Transcriptomic analysis showed that TaSTT3b‐2B affected the expression of a series of defense‐related genes and JA biosynthesis–related genes, as well as genes coding starch synthase and sucrose synthase. Application of exogenous JA elevated expression levels of the abovementioned defense‐ and grain weight–related genes, and rescuing the resistance of TaSTT3b‐2B–silenced wheat to R. cerealis, while pretreatment with sodium diethyldithiocarbamate, an inhibitor of JA synthesis, attenuated the TaSTT3b‐2B–mediated resistance to R. cerealis, suggesting that TaSTT3b‐2B played critical roles in regulating R. cerealis resistance and grain weight via JA biosynthesis. Altogether, this study reveals new functional roles of TaSTT3b‐2B in regulating plant innate immunity and grain weight, and illustrates its potential application value for wheat molecular breeding.
TaraxOS: An Operation System for Wireless Sensor Networks

An operation system (OS), named TaraxOS for wireless sensor networks is proposed. The functions of the TaraxOS such as interrupt, memory management and scheduling mechanism are researched and implemented. After introducing the node's working flow, the performances of the TaraxOS are analyzed and some limitations of the scheduling mechanism are discussed. The obtained results show that the proposed TaraxOS has some desirable characteristics including small code capacity, low power consumption, quick response and robustness.
Application of the Kalman filter for electrical endurance characterization of insulating materials and systems

The Kalman filter algorithm is applied to the results of accelerated life tests performed on insulating materials and systems carried out for electrical endurance characterization purposes. It consists of a recursive procedure that applies to the failure-time percentiles obtained from life tests, on the basis of the inverse power or the exponential models, and provides estimates of the endurance indices which give particular weight to the results of the life tests performed at the lowest test stresses. This allows more meaningful endurance characterization and accurate life prediction. This paper provides the algorithms for Kalman filter applications, giving emphasis to error estimation, as well as the method for calculation of confidence limits of life-line parameters and predicted failure times. The proposed Kalman filter procedure is applied to the experimental results of accelerated life tests relevant to different insulating materials and systems.