Miracle-dz/UniFAR-FTUs huggingface dataset:
HAMMER SHAPED ELEMENT-BASED COMPACT MIMO ANTENNA FOR WLAN APPLICATION

This paper proposes a dual-polarized and high gain, four-element based compact multipleinput-multiple-output (MIMO) antenna operating at 5.2 GHz. First, a hammer-shaped antenna has been designed with a gain of 5.3 dBi, impedance bandwidth of 400 MHz, and broadside radiation. A mathematical analysis for radiated electric field and an equivalent circuit model of the hammer-shaped antenna are developed. Using the hammer-shaped antenna as an element, four element MIMO design with shorting walls is proposed. The shorting walls near non-radiating edges improve isolation between the elements by changing the direction of the major lobe. The proposed MIMO design has an envelope correlation coefficient (ECC)< 0.15, measured gain of 5.5 dBi, and mean effective gain (MEG) ∼ −3 dB. This design has a low profile and single layer planar structure of area 65mm × 65 mm, which makes it a good contender for portable devices or low-profile hand-held applications in WLAN band.
Clinical application of mesenchymal stem cells therapy in musculoskeletal injuries in dogs—a review of the scientific literature

Mesenchymal stem cells (MSCs) are multipotent, which is defined by their ability to self-renew while maintaining the capacity to differentiate into a certain number of cells, presumably from their own germinal layer. MSCs therapy is based on their anti-inflammatory, immunomodulatory (immunosuppressive), and regenerative potential. This review aims to provide a clinical overview of the MSCs potential as a therapeutic option for orthopedic diseases in dogs. A total of 25 clinical studies published in the scientific literature in the last 15 years on various diseases will be presented: semitendinosus myopathy, supraspinatus tendinopathy, cruciate ligament rupture, bone fractures and defects, and also osteoarthritis (OA). All articles involved in this study include only diseases that have naturally occurred in canine patients. MSCs therapy in the veterinary orthopedic field has great potential, especially for OA. All studies presented promising results. However, MSCs bone healing capacity did not reveal such favorable outcomes in the long term. Besides, most of these clinical studies did not include immunohistochemistry, immunofluorescence, and histopathology to confirm that MSCs have differentiated and incorporated into the injured tissues. This review summarizes the current knowledge of canine MSCs biology, immunology, and clinical application in canine orthopedic diseases. Despite the positive results in its use, there is still a lack of defined protocols, heterogeneous samples, and concomitant medications used with MSCs therapy compromising therapeutic effects. Further studies are needed in the hope of overcoming its limitation in upcoming trials.
Proximal point algorithm for differentiable quasi-convex multiobjective optimization

The main aim of this paper is to consider the proximal point method for solving multiobjective optimization problem under the differentiability, locally Lipschitz and quasi-convex conditions of the objective function. The control conditions to guarantee that the accumulation points of any generated sequence, are Pareto critical points are provided.
Evaluating the Suitability of Studies Published in the Field of Teaching of Turkish as a Foreign Language According to Qualitative Research Standards

The aim of this study is to investigate to what extent qualitative studies published in scientific journals between 2010 and 2017 on the teaching of Turkish as a foreign language, meet qualitative research criteria. For this purpose, exploratory design from mixed method was used in the study. For the study, 131 articles on the teaching of Turkish as a foreign language, published in Turkish were analyzed. During the course of the analysis of the articles, the Qualitative Research Evaluation Form (QREF), as prepared by the researcher, was used. With the internal consistency reliability analysis, it was found that the form had had a high level of reliability. In the analyses, the topic distributions of the articles and the arithmetic means for the suitability according to qualitative research criteria were designated. Using the variables of the number of authors, the publication year and research design, and the correlation between the article’s qualitative research scores were calculated. Finally, a correlation analysis was conducted between the chapters of the articles. It was determined that most of the research was done on course materials and the problems encountered in the examined articles. As a result of the study, it is seen that the mean score of the findings section is high and the method section has a low mean. Articles are mostly 1 or 2 authors. There is a significant difference between article scores according to the publication year and research design. According to the correlation analysis between the sections of the articles, positive significant relationships were found. It is thought that although the articles published also have certain drawbacks about their suitability to the qualitative research criteria, the studies did in fact exhibit an improvement and that the future studies would therefore be of higher quality.
Transition of the DPPH-scavenging ability of sake during brewing

To control the DPPH-scavenging ability of sake, its activity during brewing was investigated. Results showed that the DPPH-scavenging ability of koji rapidly increases 40 hours after the start of kojimaking. This ability of sake mainly consists of a DPPH-scavenging ability which is directly produced by koji and one which koji first produces and then is potentiated during moromi. The DPPH -scavenging ability of sake was decreased to 50% by treatment with active carbon.
Development and Thorough Investigation of Dual-Band Wilkinson Power Divider for Arbitrary Impedance Environment

In the design and development of front-end communication systems, the arbitrary impedance environments are encountered frequently. In this article, a three-port dual-band equal power divider is proposed which also transforms all types of impedance environments at its ports inherently. The power divider is suitable for a wide range of arbitrary frequency ratios and impedance terminations at each of the input and output ports. A systematic design procedure with a design flow graph is provided. The closed-form design equations make the design process simple and quick for prototyping purposes. The proposed design approach enhances the design flexibility significantly with the presence of multiple independent variables. Design examples with distinct design specifications are provided to demonstrate the effectiveness and flexibility of the architecture. A prototype working at 1/2.6 GHz and with frequency-dependent complex load (FDCL) terminations at the input and output ports is fabricated and measured to validate the proposed architecture and design methodology. The proposed dual-band impedance transforming power divider exhibits controllable bandwidths, planar structure without any reactive element, compact size, and the ability to provide port matching for any real, complex, and frequency-dependent complex impedance terminations.
Adaptive Background Clutter Mitigation for Millimeter Wave MIMO Imaging

To suppress background clutter in short-range millimeter wave multiple-input multiple-output (MIMO) imaging, an adaptive and cost-efficient approach is proposed based on the availability of the background observation. By analyzing the origins of the background clutter, gain variation, and blocking effect are identified as the primary culprits responsible for the background clutter variation, which are treated separately in the proposed method. The gain variation is compensated with an adaptive power weighting (APW) procedure, where the gain variance is accurately and rapidly measured using the short-range profile segment associated with the interelement direct coupling. The clutter residual due to the blocking effect after APW is further removed by the combination of two zero-thresholding processes and coherence-factor-based image enhancement. The proposed method entails relatively light computational burden at the cost of acceptable memory increment, and is, thus, more amenable to real-time imaging requirement. Both simulations and experimental imaging tests on an MIMO array demonstrate the effectiveness and cost-efficiency of the proposed approach.
Micropillar Cavity Containing a CdTe Quantum Dot with a Single Manganese Ion

We report on the method of fabrication of a photonic microstructure that contains a single magnetic ion. Exactly one manganese ion was introduced into a self-assembled CdTe quantum dot, which was located in a ZnTe based micropillar cavity. The multistep fabrication procedure includes molecular beam epitaxy growth, optical characterization, and focused ion beam etching. Realization of the structure was confirmed by the observation of spectroscopic exciton lines split by six due to the exchange interaction with a manganese ion. The cavity mode was tuned to the quantum dot emission energy by a variation of the temperature. The presented technology is developed to be applied in optoelectronics based on solitary dopants.
Flower Pollination Heuristics for Parameter Estimation of Electromagnetic Plane Waves

For the last few decades, the parameter estimation of electromagnetic plane waves i.e., far field sources, impinging on antenna array geometries has attracted a lot of researchers due to their use in radar, sonar and under water acoustic environments. In this work, nature inspired heuristics based on the flower pollination algorithm (FPA) is designed for the estimation problem of amplitude and direction of arrival of far field sources impingingon uniform linear array (ULA). Using the approximation in mean squared error sense, a fitness function of the problem is developed and the strength of the FPA is utilized for optimizationof the cost function representing scenarios for various number of sources non-coherent located in the far field. The worth of the proposed FPA based nature inspired computing heuristic is established through assessment studies on fitness, histograms, cumulative distribution function and box plots analysis. The other worthy perks of the proposed scheme include simplicity of concept, ease in the implementation, extendibility andwide range of applicability to solve complex optimizationproblems. These salient features make the proposed approach as an attractive alternative to be exploited for solving different parameter estimation problems arising in nonlinear systems, power signal modelling, image processing and fault diagnosis.
Deep Periocular Recognition Method via Multi-Angle Data Augmentation

Abstract Periocular recognition technology is a biometric recognition technology widely used in identity verification. Because of its high precision, high ease of use and high security, Periocular recognition has a broad application prospect and scientific research value. In order to solve the problem of angular rotation of eyes in practical application, this paper proposes a deep learning periocular recognition method based on multi-angle data augmentation. The method is to rotate the original data set from small angle to large angle, so that the amount of data is expanded to 7 times of the original, and the diversity of data is increased at the same time. The InceptionV3 network and MobileNetV2 lightweight network are used for experimental verification respectively, and good results are obtained from multi-angle tests, indicating that the proposed method can improve the generalization ability of the model and has good robustness.
1-Bit DOA Estimation Algorithm for Strictly Non-Circular Sources

In order to take advantage of the non-circularity property and low hardware cost and consumption of 1bit quantization in DOA estimation, in this letter, we propose a 1bit DOA estimation algorithm for strictly non-circular signals with non-circularity property. The relationship between approximated covariance without quantization and 1bit quantized covarince matrix, 1bit quantized pseudo covarince matrix is further derivation and obtained based on arcsin law. The approximated covariance can achieve DOA estimation via rotational invariance techniques (ESPRIT) type and gridless methods, simulations are provided to demonstrate the effectiveness of the proposed method.
Onboard Energy Storage System Based on Interleaved High-Conversion-Ratio Quasi-Resonant Converter With Small Characteristic Impedance

An onboard energy storage system (OESS) withfast-energy-exchange capability is needed to enable future grid-to-vehicle (G2V) and vehicle-to-grid (V2G) operations. To facilitate the fast energy exchange, the OESS normally interfaces between a high voltage (HV) bus on the grid side and a low voltage (LV) bus on the vehicle side. The HV bus can be up to 1200 V, while the LV bus is as low as 48 V, which means a high conversion ratio is needed. Resonant converters are commonly used for OESS and designed with large characteristic impedance for wide-range output power and zero-voltage-switching operation. However, such a design leads to large volume and complex customization of the magnetic components. In this paper, a high-conversion-ratio OESS is proposed, which is based on interleaved quasi-resonant converters with small characteristic impedance. The resonant converters are of modular design with a small characteristic impedance to achieve small volume, low cost, and simple customization. Interleaved in LV-side-parallel and HV-side-series configuration, a high conversion ratio can be achieved. Moreover, modulated in quasi-resonant operations, all the switches can realize soft switching even at light load conditions for high efficiency. Burst control for output regulation is implemented in each modular quasi-resonant converter, while interleaved control is implemented between them to minimize the current ripple. The proposed design and control are validated by a compact 5 kW prototype with a charging/discharging current of 100 A, high power efficiency of 98.91%, a high power density of 3.86 W/cm$^3$, and high-conversion-ratio (up to 20: 1) power flow between a 1000 VDC HV bus and a 48 VDC LV bus.
City, culture and urbanism: learning from Asuncion

This article examines the formulation, implementation, and reasons for suspending the Master Plan of the Historic Centre of Asuncion (PlanCHA), Paraguay. Instead of a traditional master plan, the winner proposal of the international competition organized by the country’s National Government in 2014 is a master process composed of dozens of top-down and bottom-up participatory actions, articulated by ten initial strategies. The research carried out on PlanCHA is part of investigations ongoing at Nomads.usp, the Center for Interactive Living Studies of the Institute of Architecture and Urbanism, University of Sao Paulo, Brazil, on participatory decision-making processes in the context of urban interventions in several cities around the world. As in the case of Asuncion, we prioritize urban intervention plans that, in addition to face-to-face actions, include digital participation platforms. The research on PlanCHA aimed to understand the issues involved in the implementation of an action plan that included and depended totally on the participation of public managers, politicians, non-governmental organizations, universities, real estate agents, and traders for its success, in a capital city whose population has virtually no experience of participation in public decision-making processes. Finally, the article lists some hypotheses for the Plan’s interruption, categorized for administrative, political, and socio-economic reasons. We interviewed the winning office team in Madrid and the partner team of Paraguayan architects who implemented the project locally. In Asuncion, we also met historians, members and former members of the National and Local governments, real estate agents, community representatives, cultural producers, residents, and academic researchers. We made several technical visits to the Asuncion Historic Centre and studied historical, urban, demographic, academic, and journalistic documents.
Detrimental effects of elevated transpulmonary gradient on outcomes following restrictive mitral annuloplasty in patients with pre-existing pulmonary hypertension

Background This study retrospectively examined the association between elevated trans-pulmonary gradient (TPG), which reflects pre-capillary contribution to pulmonary hypertension (PH), and postoperative pulmonary hemodynamics and outcomes following restrictive mitral annuloplasty (RMA) in patients with pre-existing PH. Methods Pre- and postoperative (1 month) cardiac catheterization was performed in 64 patients with severely impaired left ventricular function (i.e., ejection fraction ≤40%) and pre-existing PH (mean pulmonary artery pressure (PAP) ≥25 mmHg) who underwent RMA. Patients were segregated into two groups: low TPG (≤12 mmHg) and elevated TPG (>12 mmHg). The mean follow-up period was 54±27 months. The primary outcome seen was a change in pulmonary hemodynamics after RMA; secondary outcomes were composite adverse events, including all-cause mortality and readmission for heart failure. Results Compared to the low TPG group, patients in the elevated TPG group were more likely to show a postoperative mean PAP of ≥25 mmHg (84% vs. 38%), TPG of >12 mmHg (79% vs. 11%), and pulmonary vascular resistance of ≥240 dynes/sec/cm−5 (84% vs. 6.7%) (all P<0.001), although both groups showed comparable degrees of mitral regurgitation improvement. Serial echocardiography demonstrated that Doppler-derived systolic PAP, which once decreased in both groups, remained stable in the low group while steadily increasing in the elevated group (group effect P<0.001). Patients with elevated TPG had lower freedom from composite adverse events (5-year, 20% vs. 70%, P=0.003). After adjusting for baseline covariates, the elevated TPG was independently associated with increased risk of adverse events (adjusted hazard ratio 2.9, 95% CI: 1.2–6.9, P=0.017). Conclusions Elevated TPG negatively affects postoperative pulmonary hemodynamics and late outcomes in patients with advanced cardiomyopathy and pre-existing PH who have undergone RMA. These findings suggest that the assessment of TPG should be included in post-RMA risk stratification.
The role of virtual social networks in shaping people's attitudes toward COVID-19 in Iran

BACKGROUND: The widespread occurrence of COVID-19 has caused people to seek information from various sources such as virtual social networks, which can positively or negatively affect one's mental status. In this article, we present the role of virtual social networks in shaping people's attitudes toward COVID-19 in Iran. MATERIALS AND METHODS: This is an applied descriptive study, in which 1010 users of virtual social networks were surveyed through an electronic questionnaire. Data were analyzed with SPSS, Excel, and Rapid Miner software. The FP-growth technique was used to investigate the concurrence of choices in multiple-choice questions, and the Mann–Whitney and the Kruskal–Wallis tests were used to determine the correlation of the mean of each dimension with demographic data. Moreover, the Wilcoxon signed-rank, the Shapiro–Wilk, and the Kolmogorov–Smirnov tests were used. RESULTS: Virtual social networks use increased significantly (40%) after the COVID-19 outbreak. According to users, the greatest psychological impact of virtual social networks was the induction of anxiety (46.43%) and the most common use was to learn about COVID-19 prevention and treatment (69.3%). Based on the findings, there were no significant differences between the “awareness,” “behavior intention,” and “attitude and trust” and the users’ marital status, age group, educational degree, and gender. CONCLUSION: Although social networks have enriched the public knowledge, they increased the individuals’ anxiety mostly because of controversial news and disperse of misinformation which in turn misled the users. The social networks play an important role in directing the behavioral inclinations. Accordingly, it is recommended that the authorities in healthcare system establish authentic and formal webpage in these social networks to manage controversial and voluminous information.
Treatment of myofascial trigger points of the infraspinatus is effective in relieving shoulder pain and improving shoulder functions: A randomized clinical trial

Background This study aimed to investigate the effects of ischemic compression treatment (ICT) and low-level laser therapy (LLLT) applied on the trigger points of the infraspinatus muscle on shoulder pain and function in patients with shoulder pain. Methods Thirty patients with shoulder pain were randomly categorized into the ICT group (n = 15) and LLLT groups (n = 15). ICT was performed on three myofascial trigger points (MTrPs) of the infraspinatus muscle twice a week for 4 weeks (eight sessions), with 5 minutes of treatment per trigger point. LLLT was performed similarly. Shoulder pain was assessed using the visual analogue scale (VAS) and pain pressure threshold (PPT), and shoulder function was assessed using the Korean Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire, rotator cuff strength, and range of motion (ROM) of shoulder flexion and abduction. Results Significant changes in VAS score and PPT were found after the intervention in both groups (p < 0.05). Significant changes were observed in the Korean DASH score, rotator cuff strength, and ROM of shoulder flexion (p < 0.05) but not in the ROM of shoulder abduction (p < 0.05). There were no significant differences between the two groups. Conclusion This study showed that both ICT and LLLT applied on the MTrPs of the infraspinatus muscle were effective for relieving shoulder pain and improving shoulder functions in patients with shoulder pain.
Location, location, location! Real effects from the mandated removal of pension expected return from operating income

The accounting for defined-benefit (DB) pension expense in U.S. GAAP involves offsetting pension costs against an expected (rather than actual) return on pension assets. Pensions commentators argue that this expensing model tilts pension portfolios towards riskier assets – as sponsoring firms can benefit from assuming higher expected rates of return on riskier assets (which reduce pension expense and boost reported income), without bearing the cost of higher volatility in reported income. We examine a recent regulatory change in U.S. GAAP, which mandates the relocation of the expected return on pension assets from “above the line” of to “below the line” of operating income. Consistent with this change reducing the financial reporting incentives for risk-taking, we predict and find that a sample of U.S. firms subject to this mandate reduces risk-taking in pension assets following the change, relative to a control sample of Canadian firms not subject to the change. In cross-sectional tests, we find that the reduction in risk-taking is more pronounced in (1) firms where the financial reporting incentives for risk-taking were stronger in the pre-period, and in (2) firms where the regulatory change particularly reduced those benefits. Our findings imply that managers are willing to undertake real actions (i.e., invest in riskier assets) to report favorable operating income, and that these incentives are incremental to the incentives to report favorable net income. They also provide evidence that financial reporting incentives serve as a driver of pension asset allocation decisions.