Miracle-dz/UniFAR-FTUs huggingface dataset:
Microwave Heat-Treated Electronic Waste Constituted X-Band Radar Absorbing Structure Using Electromagnetic Mixing Model Assisted Optimization Strategy

Potential radar absorbing material (RAM) for suppressing electromagnetic (EM) wave over a range of oblique angles of incidence are needed in many applications. In this article, an attempt is being made to build cost-effective and efficient RAM using the EM characterization of microwave heat-treated (MHT) electronic waste followed by an EM mixing model-assisted analytical approach. The robust and facile top-down fabrication technique is employed for the development of heterogeneous composites, which are further subjected to microwave heat treatment at distinct power wattages. The magneto-dielectric spectrographic analysis of samples is carried out in the range of 8.2 to 12.4 GHz. The Debye parameters are optimized and succeeded to obey EM property of the synthesized samples. Jaya's algorithm is adopted for the optimal design of single and dual-layer RAMs at normal and oblique angle incidence based on the constitutive EM parameters under certain restrictive conditions. The embraced MHT method prompts an improvement in microstructure coherency that further increases absorption bandwidth (BW). As a result, a 2.1 mm thick single layer RAM achieves a minimum reflection coefficient (RC) of −17.1 dB at 10.3 GHz with a 100% BW below −10 dB threshold. The groundbreaking findings are obtained by performing a three-fold study of dual-layer RAMs, culminating a minimum RC of −47.8 dB at 11.8 GHz with a layer thickness of 1.8 mm. This article shows that the microwave heat-treated composites have enormous potential in the development of lightweight and broadband RAMs for stealth applications.
Temperature Compensation With Highly Integrated Ionization Sensor Array Used in Simultaneous Detection of Mixed Gases

On-line detection of fault characteristic gases released by the insulation oil of transformers is developed as a scientific basis for estimating explosion accidents. However, the performance of most gas sensors, such as H2 and C2H2 sensors, is usually affected by temperature, and there exists large detection error when the temperature of transformer oil changes in operation. And the existing temperature compensation methods suffer from problems such as low integration, large volume, and high costs. Herein, a sensor array based on three triple-electrode sensors with carbon nanotubes was fabricated. Each of the three sensors has three vertically stacked electrodes with various interelectrode distances. The first and second sensors were used to detect H2 and C2H2, respectively, and the third sensor was used to measure temperature. All the detection mechanisms are based on the dependence of discharge current on gas concentration and temperature. The sensor array could detect H2/C2H2 mixture and temperature due to the exponential function between the output currents and electrode separations. The proposed sensor exhibited low relative and repeatability error values less than 5.1% and 4.9%, respectively, and displayed humidity compensation potential like temperature. High integration makes the sensor array superior among the other mechanism sensors.
Video-Mediated Interaction (VMI)

Video-Mediated Interaction (VMI) has become a mainstream, recognisable form of interaction that is often necessary for the routine accomplishment of institutional activities. It is probable that, in the wake of COVID-19, we are currently witnessing the emergence of a new normal that is rapidly forcing people to learn how to interact via different kinds of video-mediating technologies. Whereas prior research has predominantly provided insights into, e.g. frequencies of meetings or people’s feelings and experiences based on interviews, in this special issue we present new findings regarding the detailed interactional organisation and sense-making practices in which people are practically engaged, as these naturally unfold in situated contexts. Grounded in ethnomethodology and conversation analysis (EMCA) and video-based data-collection methodology, all of the papers in this special issue explore, at a very detailed and granular level, just how video-mediated interaction is accomplished moment by moment. This approach and its findings contribute new knowledge to research communities working with video-mediation. As such, this approach is of considerable value to practitioners who need to achieve institutional goals in effective ways. In this introduction, we present a short overview of the state-of-the-art in EMCA research, and highlight the new findings contributed by the seven articles in this special issue.
Effect of Dentifrices with Different Abrasives on the Surface Roughness of a Nano Composite Resins materials

Background: to evaluate the effect of different dentifrices on the surface roughness of two composite resins(nanofilled-based and nanoceramic – based composite resins). Materials and methods: Forty specimens(diameter 12 mm and height of 2mm) prepared from different composite resin materials: Z350 (nanofilledcomposite, and Ceram-X (nanoceramic) . they were subjected to brushing simulation equivalent to theperiod of 1 year. The groups assessed were a control group brushed with distilled water (G1), Opalescencewhitening toothpasteR (G2), Colgate sensitive pro-relief (G3) and Biomed Charcoal Toothpaste (G4). Theinitial and final roughness of each group was tested by surface roughness tester. The results were statisticallyanalyzed using ANOVA and Tueky test at 0.05 significance level. Results: the surface roughness of thetwo tested composites brushed with the tested dentifrices was statistically higher than the roughness foundin control group. Comparison among the three types of dentifrices showed that there was a statisticallyhigh significant difference in the surface roughness among all subgroups. Charcoal Toothpaste showed thehighest surface roughness increase. Conclusion: Whitening dentifrices increase the surface roughness ofdental composite thereby compromising its durability. Changes in composite depended on the material itselfand the dentifrices used.
REVENUE SURPRISE AND EQUITY RETURNS IN BORSA ISTANBUL

This paper examines the importance of revenue surprise in the cross-section of stock returns in Borsa Istanbul. Portfolio-level analyses and multivariate cross-sectional regressions document a statistically and economically significant positive relation between revenue surprise and expected returns. Average excess and abnormal return spreads between equities in the highest and lowest revenue surprise deciles are more than 1% per month. The findings of the paper are robust when well-known firm-specific attributes including earnings surprise are controlled for.
The role of trust in HPV vaccine uptake among racial and ethnic minorities in the United States: a narrative review

Despite the clinically proven benefits of the human papillomavirus (HPV) vaccine in preventing cervical and other HPV-associated cancers, vaccination coverage has been suboptimal among adolescents and young adults in the United States (US), particularly among racial and ethnic minority adolescents. Historical legacies, combined with current racial/ethnic disparities in healthcare, may contribute to suboptimal uptake and completion of the HPV vaccine in part through differing levels of trust in doctors and healthcare institutions. The purpose of this narrative review was to characterize trust and its role in decision making about HPV vaccine uptake among US racial and ethnic minorities. We conducted a literature search using the PubMed database, and our search terms yielded 1176 articles. We reviewed 41 full-text articles for eligibility and included 20 articles in this review. These studies used varied measures of trust or mistrust and assessed trust in not only doctors/healthcare providers, but also other sources including pharmaceutical companies, media, and clergy. Our review findings revealed generally high levels of trust in doctors and healthcare providers, but less so in pharmaceutical companies. Mistrust of either healthcare providers, government agencies or pharmaceutical companies was consistently associated with less favorable attitudes and lower vaccine uptake. The downstream effects of mistrust may occur through selected health beliefs regarding the perceived efficacy and safety of the vaccine. Minority groups were more likely to report trust in family members, religious organizations, and media sources compared to their white counterparts. Decision making about vaccine uptake is a multilayered process that involves comparing the perceived benefits of the vaccine against its perceived risks. Understanding how trusted sources can effectively harness the tools of social and traditional media to increase knowledge and awareness may help combat misinformation about the HPV vaccine and improve engagement with diverse communities.
Respiratory Compensated Robot for Liver Cancer Treatment: Design, Fabrication, and Benchtop Characterization

Hepatocellularcarcinoma (HCC) is one of the leading causes of cancer-related deaths in the world. Radiofrequency ablation (RFA) is an effective method for treating tumors less than 5 cm. However, manually placing the RFA needle at the site of the tumor is challenging due to the complicated respiratory induced motion of the liver. This article presents the design, fabrication, and benchtop characterization of a patient mounted, respiratory compensated robotic needle insertion platform to perform percutaneous needle interventions. The robotic platform consists of a four degrees of freedom (DoF) dual-stage Cartesian platform used to control the pose of a one-DoF needle insertion module. The active needle insertion module consists of a 3-D printed flexible fluidic actuator capable of providing a steplike, grasp–insert–release actuation that mimics the manual insertion procedure. Force characterization of the needle insertion module indicates that the device is capable of producing 22.6 ± 0.40 N before the needle slips between the grippers. Static phantom targeting experiments indicate a positional error of 1.14 ± 0.30 mm and orientational error of 0.99° ± 0.36°. Static ex vivo porcine liver targeting experiments indicate a positional error of 1.22 ± 0.31 mm and orientational error of 1.16° ± 0.44°. Dynamic targeting experiments with the proposed active motion compensation in dynamic phantom and ex vivo porcine liver show 66.3% and 69.6% positional accuracy improvement, respectively. Future work will continue to develop this platform with the long-term goal of applying the system to RFA for HCC.
Effect of Dry Surface Treatment with Ozone and Ammonia on Physico-chemical Characteristics of Dried Low Rank Coal

The physical and chemical properties of the dried low rank coals (LRCs) before and after the surface treatment using ozone and ammonia were characterized in this study. The contents of moisture, volatiles, fixed carbon and ash consisting of dried LRCs before the surface treatment were about 2.0, 44.8, 44.9 and 8.9%, respectively. Also, it was composed of carbon of 62.66%, hydrogen of 4.33%, nitrogen of 0.94%, oxygen of 27.01% and sulfur of 0.09%. The dried LRCs was surface-treated with the various dry methods using gases such as ozone at room temperature, ammonia at and then the dried LRCs before and after the surface treatment were characterized by the various analysis methods such as FT-IR, TGA, proximate and elemental analysis, caloric value, ignition test, adsorption of and . As a result, the oxygen content increased and the calorific value, ignition temperature and the contents of carbon and hydrogen relatively decreased because the oxygen- contained functional groups were additionally generated by the surface oxidation with ozone which plays a role as an oxidant. Also, its adsorption ability got higher because the hydrophilic oxygen-contained functional groups were additionally generated by the surface oxidation with ozone. On the other hand, it was confirmed that the dried LRCs after the surface treatment with at have the decreased oxygen content, but the increased calorific value, ignition temperature and contents of carbon and hydrogen because of the decomposition of oxygen-contained functional groups the on the surface. In addition, the adsorption ability was lowered bucause the surface of the dried LRCs might be hydrophobicized by the loss of the hydrophilic oxygen-contained functional groups. It was concluded that the various physico-chemical properties of the dried LRCs can be changed by the surface treatment.
Is a promise a promise? Analyzing performance commitment in acquisitions and target firm performance

Using the acquisition data in China from 2011 to 2019, we show that acquiring firms are more likely to provide target firms with performance commitment (PC) contracts when they (1) use stocks to pay acquisitions, (2) have low profits, (3) make cross-industry and domestic acquisitions, (4) are young, small, non-stated-owned enterprises and not related parties with target firms, and (5) deal value is high. Although PC increases the takeover premia, acquirers with PC experience high cumulative abnormal stock returns (CARs) during the announcement period. Double PC contracts drive acquirers' CARs even higher. Although target firms with double PC have better profitability than those with single PC during the commitment period, their profit starts to decrease sharply once the commitment period expires, and those with double PC deteriorate even further. Finally, we find that target firms with PC engage in earnings management during the commitment period to meet their promised performance. Overall, we do not support previous studies because PCs engender earnings management and impair the values of acquirers in the post-commitment period.
Financial literacy: What is the fact of the digital startups “Startup Singo Edan Malang”?

The purpose of this research is to analyze financial literacy in the digital start-up business of “Startup Singo Edan Malang” community. The research approach used quantitative and qualitative with descriptive analysis methods. The sample of this study was 117 respondents who were obtained through questionnaires and open interviews. The results were obtained information if knowledge of credit interest rates is preferred in making credit decisions. This is evident from the experience of short-term credit in banking financial institutions. The fact that investment knowledge is obtained is if there is more understanding of banking products than capital market investment products. However, the investment experience is not in line with this investment knowledge, because of community integration. For financial management regarding credit guarantees, the level of knowledge is high, but not with short-term and long-term financial management. Experience in short-term financial management, especially credit cards, is based on a precautionary motive.
Fast Direction of Arrival Estimation for Uniform Circular Arrays With a Virtual Signal Subspace

In this article, an augmented subspace-based algorithm for detecting the direction of arrival (DOA) of signals is presented. In the developed scheme, a uniform circular antenna array with a full range of lateral capacity is first transformed into a uniform linear antenna array in which the steering matrix has a Vandermonde form. This kind of structure can be exploited to formulate computationally efficient search-free estimation methods. In the process of virtual transformation, a novel DOA unit matrix of an assumed sector where the signals to be detected are located is built and optimized to find response matrices of the real and virtual antenna arrays to signals from the sector. By utilizing singular value decomposition (SVD) of the response matrix of the real antenna array to possible signals from the sector, a stable virtual transformation matrix between the real and virtual antenna arrays is obtained. Meanwhile, the aperture of the original array is also expanded during this process. Then, a virtual cyclic optimization algorithm is introduced to thoroughly mine information from the correlation matrices of the virtual antenna array receiving data and to optimize the signal subspace. Subsequently, the DOA can be efficiently determined through the reconstruction of the steering matrix. In the experimental part of the study, root-mean-square errors and probability of success are used to evaluate the performance of the algorithms. In particular, simulation results demonstrate that the proposed methods provide significant accuracy improvements, especially for low signal-to-noise ratio thresholds.
A NEW FAST, MEMORY EFFICIENT WIRELESS ELECTROMAGNETIC BEAMFORMER ANTENNA WITH FAST TRACKING FOR 5/6G SYSTEMS

—The much-anticipated year of 5G deployment has lapsed, and yet much research is ongoing on the 5G New Radio (NR) interface. The quality of service and user experience is dependent on a stable and signal strength of the wireless communication link. To serve multiple users per sector accessing dedicated and unique services pose a challenge for passive antenna systems with omnidirectional beams. Smart 5G antenna technology with null forming and beamforming promises to serve mobile users well by oﬀering a reliable wireless communication link. To address this need, we propose a 2 × 2 MIMO antenna capable of electronically forming electromagnetic beams in one direction and nullifying electromagnetic beams in any undesired direction. We demonstrate the usefulness of the proposed antenna by evaluating ﬁve cases that showed interesting insights, conﬁrming the hypothesis that it is possible to implement beamforming in a 2 × 2 MIMO system with less computing power and minimum number crunching. What is novel and attractive about the proposed antenna are: (a) forming a beam with maximum directivity towards the desired user, while (b) simultaneously producing nulls towards an undesirable transmitter, and (c) a fast electromagnetic tracking module inbuilt into it so that the base station antenna may constantly track and maintain the communication link with the moving wireless transceiver or cell phone. While most wireless mobile systems use two separate software modules for beamforming and tracking the mobile station, the method presented here does electronic beamforming and tracking of the mobile user with a single low memory, computationally fast technique within the range of 10 ms to 19 s.
Comparison of direct synthesis of silver nanoparticles colloid using pullulan under conventional heating and microwave irradiation

ABSTRACT In this comparative study, synthesis of pullulan-stabilized silver nanoparticles (AgNPs) colloid using conventional heating (CH) and microwave irradiation (MI) methods was investigated. The resulting AgNPs were characterized by UV-Vis, X-ray diffraction, and transmission electron microscopy. The reaction time and temperature were optimized for CH, and MI are 110°C, 40 min and 90°C, 10 min, respectively. The microwave-assisted approach improved pullulan/AgNPs colloid formation, with higher efficiency, shorter time, and lower temperature. However, the CH method produced more stable AgNPs with larger mean sizes. The antibacterial activities of the samples from CH and MI processes were compared.
Hepatitis B e Antigen Synthesis is Inhibited by a Galactosylated Arginine-Rich Macromolecule Via Asialoglycoprotein Receptor

HBV: hepatitis B virus; HBeAg: hepatitis B e antigen; HBsAg: hepatitis B surface antigen; CMK: decanoyl-RVKR-chloromethylketone; D6R: hexa-D-arginine; D9R: nona-D-arginine; ASGP-R: asialoglycoprotein receptor; gal: galactosylated; FPd: furin prodomain; BSA: bovine serum albumin; NTCP: Sodium taurocholate cotransporting polypeptide; PCR: polymerase chain reaction; GEq: genome equivalent; HAS: human serum albumin; PTB: prothrombin; MTT: 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide; ALT: alanine aminotransferase
The Effects of Hole Arrangement and Density Ratio on the Heat Transfer Coefficient Augmentation of Fan-Shaped Film Cooling Holes

An experimental study was performed to investigate the effects of the arrangement of fan-shaped film cooling holes and density ratio (DR) on heat transfer coefficient augmentation. Both single- and multi-row fan-shaped film cooling holes were considered. For the multi-row fan-shaped holes, the heat transfer coefficient was measured at DRs of 1 and 2, and both staggered and inline arrangements of holes were considered. For the single-row fan-shaped holes, DR = 1.0, 1.5, 2.0, and 2.5 and M = 1.0 and 2.0 conditions were tested. The mainstream velocity was 20 m/s, and the turbulence intensity and boundary layer thickness were 3.6% and 6 mm, respectively. The heat transfer coefficient was measured using the one-dimensional transient infrared thermography method. The results show that an increased heat transfer coefficient augmentation is observed between film cooling holes for the case with a smaller hole pitch and higher blowing ratio. For the given fan-shaped hole parameters, the effects of the row-to-row distance and hole arrangement are not significant. In addition, as the velocity difference between the mainstream and coolant increases, the heat transfer coefficient ratio increases.
Fouling Identification for Nanofiltration Membrane and the Potential Reduction of Pollutants in the Leachate by Using Fe/Al/PAC Coagulation

The reduction in the fouling is an important way to maintain the steady operation for the nanofiltration (NF) process in leachate treatment. The fouling components from the real leachate treatment process were identified using a scanning electron microscope equipped with X-ray microanalysis (SEM-EDS), infrared spectroscopy (FTIR), atomic analysis and three-dimensional fluorescence (EEM) analysis, and the coagulation of Fe/Al/PAC was selected to reduce the potential pollutants in the leachate, to reduce the potential fouling. It was found that organic humic acid and calcium-magnesium precipitates were the main pollutants in NF fouling. The foulant layer was the result of the combination of organic matter, inorganic precipitation, colloids and microorganisms, and the colloids precipitation is more important, and should be removed in advance. PAC was found to be more efficiency to reduce the colloids and the inorganic matter, among the coagulants selection, with the chemical oxygen demand (COD) removal rate of 55.1%. The commercially available coagulant-poly aluminum chloride (PAC) was chosen as a coagulant. The removal rate of leachate reached 55.1%, and the flow rate through the membrane was increased by 35.8% under the optimum condition (pH was 5.0, PAC dosage was 100 mg/L, and the membrane pressure was 0.4 MPa). Through the pilot scale test, the effluent was connected to the microfiltration membrane and then to the nanofiltration membrane and the practical engineering application is feasible.
The Impact of Work-Family Conflict and Emotional Intelligence on Nurse’s Performance at Dr. Pirngadi Hospital Medan

Objective: The study was to identify the impact of work-family conflict (WFC) and emotional intelligence(EI) on the performance of nurses at Dr. Pirngadi Hospital Medan.Methods: Quantitative correlation descriptive with a cross-sectional design was applied in this study. Thepopulation of the research is 115 nurses. Data were analyzed by using the Spearmen correlation coefficienttest.Results: The results show that both WFC and EI impact on the performance of nurses at Dr. PirngadiHospital Medan. Mostly nurses (69.6 %) were highly impacted by WFC and 67.8 % of them were in the lowlevel of EI.Conclusion: The factor which impacts on the performance of nurses at Dr. Pirngadi Hospital Medan isdominated by emotional intelligence. Nurses should distinguish between a housewife and a nurse.