Miracle-dz/UniFAR-FTUs huggingface dataset:
VSI-PWM rectifier/inverter system with a reduced switch count

A current controlled VSI-PWM rectifier and inverter with capacitor DC link is regarded as one of the most promising structures for three-phase to three-phase power conversion. This type of converter normally requires twelve switches for a rectifier and inverter composed of self turn-on switch such as a bipolar transistor or IGBT with an anti-parallel diode. In this paper, a new three phase to three-phase converter for AC motor drives is proposed The proposed converter employs only eight switches and has the capability of delivering sinusoidal input currents with unity power factor and bidirectional power flow. This paper describes the feasibility and the operational limitations of the proposed structure. A mathematical model of the system is derived using generalized modulation theory and experimental results for steady state and dynamic behavior are presented to verify the developed model.
Scalability of human models

The objective of this work was to create a scalable human occupant model that allows adaptation of human models with respect to size, weight and several mechanical parameters. Therefore, for the first time two scalable facet human models were developed in MADYMO. First, a scalable human male was created from an existing 50th percentile human occupant. But since the anthropometry between males and females differs too severely, a scalable human female was created as well to be able to obtain female models with different anthropometry. Using these models in the MADYMO / Scaler, a target model anthropometry could be created either by defining an anthropometry set of 35 values, by defining 16 fixed scale factors or by using the GEBOD anthropometry database (BAUGHMAN, 1986). Additional to the geometric properties, the following mechanical properties were also scaled using appropriate scaling rules: mass, inertia, stiffness and contact characteristics. Several anthropometrically extreme models, ranging from small children to large adults, have been created using the 3 possible methods to provide the input. Direct definition of anthropometry values and definition of fixed scaling factors resulted in realistic scaled models, whereas using the GEBOD anthropometry database could lead to unrealistic ones, especially when scaling towards children. A frontal crash application has been developed, using the original 50th percentile human occupant as released with MADYMO and two scaled male models of 65 kg and 85 kg weight with equal height as the base model, to demonstrate the benefit of the scalable models.
Analyzing antecedents and consequences of multidimensional green brand equity

ABSTRACT As consumers are paying more attention to environmental issues, many hoteliers are in the process of transforming their businesses to reinforce their promises to achieve sustainability to pursue higher brand equity. In this context, the current research endeavors to test the nomological validity of a newly established multidimensional green brand equity (MGBE) scale in the hospitality industry, and investigate the relative impact of brand credibility, country of origin, and brand trust on MGBE dimensions and its consequences in the European hotel industry. The data were collected from 1291 tourists and analyzed using structural equation modeling. This study confirms the nomological validity of a unique MGBE scale – sustainability, social influence, perceived quality, brand leadership, brand awareness, and brand association – and indicates that COO has a stronger impact on brand leadership, whereas brand credibility has a stronger influence on sustainability. Moreover, perceived quality and brand leadership have a stronger impact on purchase intentions, while sustainability and social influence have a strong influence on brand preference.
High efficiency C-band 1000 element rectenna array for microwave powered applications

A highly efficient rectenna array, at 5.87 GHz, comprising 1000 dipole elements has been designed, developed, and demonstrated for microwave powered applications. The rectenna dipole elements exhibits an RF-to-DC efficiency exceeding 80% with a uniform illuminated aperture. The rectification element consists of a custom-packaged silicon Schottky diode quad bridge with a high reverse breakdown voltage. The novel mechanical structure of the low-cost rectenna consists of a dipole array substrate and a busbar substrate suitably assembled to ensure diode cooling through conduction and convection. <<ETX>>
Novel Sodium Alginate/Polyvinylpyrrolidone/TiO2 Nanocomposite for Efficient Removal of Cationic Dye from Aqueous Solution

The combination of adsorption and photodegradation processes is an effective technique for the removal of dye contaminants from water, which is motivating the development of novel adsorbent-photocatalyst materials for wastewater treatment. Herein, novel nanocomposite porous beads were developed using titanium dioxide (TiO2) nanotubes embedded in a sodium alginate (SA)/polyvinylpyrrolidone (PVP) matrix using calcium chloride solution as a crosslinker. The prepared nanocomposite beads’ performance was examined as an adsorbent-photocatalyst for the breakdown of methylene blue in aqueous solutions. Several operation factors influencing the dye decomposition process, including photocatalyst dosage, illumination time, light intensity, and stability were investigated. The findings demonstrated that the removal activity of the beads changed with the TiO2 weight ratio in the composite. It was found that SA/PVP/TiO2-3 nanocomposite beads presented the greatest deterioration efficiency for methylene blue dye (98.9%). The cycling ability and reusability of the prepared SA/PVP/TiO2 nanocomposite beads recommend their use as efficient, eco-friendly materials for the treatment of wastewaters contaminated with cationic dyes.
Dynamic reconfiguration and simulation of manufacturing systems using agents

Purpose – Conventionally, various levels of decisions with regard to production are made in a number of sequential stages such as system design, production/process planning, production scheduling, system reconfiguration and system restructure. This paper aims to present an integrated approach for modelling, restructuring and simulating manufacturing systems to suit changing manufacturing situations as quickly as possible.Design/methodology/approach – An agent‐based approach is employed where each manufacturing resource is represented by an agent. Simply speaking, the approach enables the machines in a manufacturing system to manage themselves efficiently and effectively.Findings – The agent‐based modelling and interaction approach enables manufacturing resources to be allocated dynamically in an optimal manner. The modelling approach also enables alternative system configurations to be identified and evaluated using distributed discrete event simulation system. Resource allocation and manufacturing system.
Antioxidant and bio-activities of leaf extracts from Eucalyptus globulus

Eucalyptus globulus member of Myrtacaea family, is one of the important medicinal widely used plant.In this study methanolic leaf extract of Eucalyptus globulus was studied for the estimation of phytochemical constituents , in-vitro antioxidant and anti-inflammatory activity . Fresh leaves were ground with methanol used for estimations. Phytochemical constituents were estimated by total phenolic content and total Flavonoid content determination. Spectroscopic analysis by UV-VIS, FT-IR and fluorescents analysis was also conducted. In vitro anti- inflammatory and antimicrobial activities were also monitored.Phytochemical screening revealed the presence of flavonoids , phenols , carbohydates and saponins. Considerable amount of phenolics (50 mg equivalent par g of dry weight) and flavonoids (23 mg equivalent par g of dry weight) were detected in extract. Extract exhibited considerable DPPH (1,1-diphenyl-2-picrylhydrazyl), ABTS (2,2’-azinobis-3-ethylbenzothiazoline-6-sulphonate) scavenging activities, Hydroxyl radical scavenging activity, Nitric oxide radical scavenging activity , Iron reducing power and Superoxide radical scavenging activity. Fluorescent spectroscopy revealed the presence of fluorophores in extracts. A strong anti-inflammatory activity of extract was observed using fluorescent spectroscopy. An appreciable in vitro antibacterial activity against gram-negative bacteria like gram-negative bacteria Escherichia coli, MTCC 40 was detected. This study confirmed that methanolic extract Eucalyptusglobulus possesses potent antioxidant anti-inflammatory and antibacterial activities possibly important quantity of flavonoid and phenolic content present in it .
Prediction of carrot firmness based on water content and total soluble solids of carrot

Carrot firmness (FIR) is often determined using difficult and time consuming laboratory tests, but it may be more appropriate and economical to develop a method which uses easily available and known quality characteristics of carrot such as water content (WC) and total soluble solids (TSS). In this study, a typical two variables linear regression model with zero constant for predicting FIR of Nantes carrot based on WC and TSS of carrot was suggested. The statistical results of the study indicated that in order to predict carrot FIR based on WC and TSS of carrot the two variables linear regression model with zero constant FIR = 40.34 WC - 40.25 TSS with R 2 = 0.99 can be strongly recommended.
An innovative fast powerful method for tackling electromagnetic eigenvalue problems for multistrip transmission lines

A full-wave electromagnetic technique is developed for the rapid and accurate calculation of dispersion characteristics in multiconductor and multilayer planar transmission lines. The proposed method is based on the Mrozowski and Przybyszewski algorithms. This powerful method calculates an approximate value of propagation constant at a desired frequency based on more accurate computations of the field distribution and propagation constant at a few selected frequency points. Comparison with previously accurate published data and numerical tests are first performed to confirm the accuracy of our procedure. Numerical results for several configurations are presented.
Study on the Effect of the Evaporator Area on the Heat Transfer Performance in the Gravity Feed Liquid Refrigeration System

In order to study the effect on heat transfer performance of evaporator in the gravity feed liquid refrigeration system the different evaporator area, the simulation procedure is worked out. The procedure uses the visual basic language. The procedure can figure out the heat transfer coefficient and the temperature difference in different evaporator area and evaporating temperature with the required refrigerating capacity. Through simulation calculation, when the area is 80% of the original design area of evaporator, the evaporator of the heat transfer coefficient and heat transfer temperature difference is the most reasonable and the evaporator of the refrigerating capacity can meet the requirements of cold storage. The program provides the reliable data for the gravity feed liquid cooling system optimization.
Malaysian Good Agricultural Practice (MyGAP): Challenges, Motivation, and Benefit of Practice by Cattle Farmers in Peninsular Malaysia

| This study examines the factor determine the challenges, motivation, and benefit of practice good agricultural practices among cattle farmer in Peninsular Malaysia. The study reveals that not all small cattle farmers in Peninsular Malaysia certified with Malaysian Good Agricultural Practices (MyGAP) certificate and some still unfamiliar with that scheme. Using a data obtained from a face-to-face interview among 355 cattle farmers conducted in six state of Peninsular Malaysia from April until October 2018, it was found that the main challenges, motivation, and benefit of practice good agricultural practices among cattle farmers in Peninsular Malaysia is lack of fund (94.1%), desire to improve the quality and health of livestock (97.2%) and reduce disease infection (90.1%), respectively. The study may inspire strategies to Department of Veterinary Services in ensuring all small farmers certified by MyGAP certificate and practice good agricultural practices.
Bulk lifetime determination of etch-thinned InSb wafers for two-dimensional infrared focal plane array

The bulk lifetime of etch-thinned InSb wafers, with lithography on both sides, has been measured. A device was specially designed to directly measure the diffusion length of the etch-thinned layer. The diffusion length was found to be approximately 35 mu m at 77 K, which yields a lifetime of approximately 250 ns. No degradation to the semiconductor due to the thinning process, the passivation on both sides, possible defects or mechanical stress in the thinned layer, or other fabrication processes was found. The reported measurements characterize the fabrication technology of the etch-thinned and processed InSb wafers, designed for backside-illuminated two-dimensional detector arrays for an infrared hybrid focal plane. >
The penetrating of repetitive UWB pulse into a rectangular cavity through slots

The coupling effects of repetitive ultra-wideband (UWB) electromagnetic pulse into a rectangular cavity through slots are calculated by using the finite difference time domain (FDTD) method. By analyzing the energy coupling into the cavity, the coupling resonant characteristic of repetitive UWB pulse with slots is obtained. The results are useful to study the shielding performance of metallic enclosures.
Noncontact Reflow Oven Thermal Profile Prediction Based on Artificial Neural Network

This research proposes a thermal profile prediction model in the soldering reflow process (SRP). The thermal profile is the temperature of the solder paste during SRP and is affected by multiple factors [i.e., temperature setting for the oven chamber (thermal recipe) and conveyor belt speed]. The quality of the printed circuit board (PCB) is determined mainly by the thermal profile, because the components are attached to the board by the solder joint, which is generated during SRP. The thermal profile shape decides the performance of the solder joint, such as its strength. Solder paste manufacturers usually provide a target profile based on the physical properties of the solder paste composition. Comparing the experimental profile and target profile is the most simple, direct, and effective way to judge the PCB quality. In general, the thermal profile is collected from the thermocouples attached to the solder paste. To overcome drawbacks such as low testing efficiency, a noncontact machine learning-based thermal profile prediction model is developed in this research to monitor thermal performance. The noncontact prediction is of great significance to the PCB production line and meets the requirements of Industry 4.0 with a high degree of automation. Specifically, the prediction model is developed based on an artificial neural network (ANN). Several environmental factors are utilized as input data to forecast the board temperature. Then, a pooling model is devised to address the thermal profile. The proposed model is mainly for the passive components, such as 1005. The prediction model shows the promising ability to predict the thermal profile by showing a 97.2% accuracy with the testing data.
Inset-microstripline-fed circularly polarized microstrip antennas

A novel design of the inset-microstripline-fed circularly-polarized microstrip antenna by using a corner-truncated patch with an inserted slit is first successfully implemented. By further inserting slits at the corner-truncated patch boundary, the compact inset-microstripline-fed circularly-polarized microstrip antenna is also studied. Results have been obtained that, due to the inset-microstripline-fed reactive effect, this truncated corner perturbation can not be directly applied to the inset-microstripline fed circularly polarized microstrip antenna with good impedance matching condition.
Current mode controlled bidirectional flyback converter

A description is given of a current-mode-controlled bidirectional flyback converter handling different values of power in either direction. The flyback transformer operates in a continuous conduction mode in one direction and in a discontinuous conduction mode in the other direction of power flow. Signal flow graph modeling, analysis, and design of such a scheme are presented. Experimental results are included. <<ETX>>
Analysis of broadband microstrip-slotline transitions with multi-arm stubs

For a compromised design of microstrip-slotline transitions with multi-arm stubs, the relation between the number of arms and the bandwidth is necessary. This issue is examined using a modelling technique based on the equivalent circuit of the transition. The technique is used to analyse two broadband (1-10 GHz and 5-50 GHz) transitions with stubs having different number of arms.
The Effect of the Radius of the Circular Patch Antenna in the Ku-Band

This paper presents a more general approach to the evolution of the resonant frequency according to the radius of the circular patch antenna. Transmission line theory and the resonator model are adopted to analyze the operating frequencies of the proposed antenna. A uniplanar corner-fed patch antenna is presented with single-point microstrip feed and single layer substrate. We used HFSS (high frequency structured simulator) software for simulation of antenna and to find out the results. We keep changing the design of antenna as our motive was to achieve miniature antenna with better results than conventional antenna's. Patch radius decreases as the resonant frequency increases (3.06 mm at 18.31 GHz and 2.51 mm at 19.35 GHz). The results obtained in this design compare favorably with results obtained from manual computation of the same parameters and these agree with other designs such as the rectangular patch.
The Estimate Feedback Equalizer: A Suboptimum Nonlinear Receiver

A recursive nonlinear equalizer has been developed. The Bayes estimation theory has been used to obtain an unrealizable nonlinear minimum mean-square error (MMSE) receiver for the reception of binary pulse-amplitude-modulation signals in the presence of intersymbol interference and noise. A realizable approximation to the Bayes structure has been derived as the combination of a matched filter and a nonlinear recursive equalizer structure. The equalizer has been made adaptive using a new algorithm that defines and maintains the time frame of reference and is constrained so that the equalizer's parameters always move toward their optimum values. Computer simulations have been used to demonstrate the properties of the estimate feedback equalizer (EFE) and to compare its performance to that of presently known equalizers.
Multi-criteria decision support and stakeholder involvement in emergency management

Decision-making in emergency management involves many parties with different views, responsibilities and interests for which a consensus must be found. Multi-Criteria Decision Analysis (MCDA) can help to ensure transparency in such decision processes. This paper describes the application of MCDA in nuclear emergency and remediation management and the experiences gained from conducting moderated decision-making workshops. The workshops were based on a hypothetical nuclear accident scenario generated by the real-time online decision support system, RODOS, for nuclear emergency management. Focusing on the evaluation of long-term countermeasures, the multi-criteria decision support software, Web-HIPRE was used to guide and support the participating decision-makers, stakeholders and experts during the decision-making process in the moderated discussion. This software has been integrated into the RODOS system. In addition to identifying the factors driving decision-making in the context of nuclear emergency management, issues for further development of methodology and decision support tools were determined.
An enhanced method for determining electromagnetic properties of periodic materials

A three-dimensional finite-element method with efficient boundary conditions is presented to simulate the electromagnetic properties of heterogeneous periodic materials. The analysis based on a waveguide approach applies to arbitrary profiles with any kind of inclusions for all incidence conditions. Floquet's theorem is used to take into account the periodicity of the problem. This method allows one to handle the scattering effects in the material. For periodically organized composite materials, we can extract an effective permeability and permittivity under certain hypotheses.
LOW VOLTAGE OPERATION ELECTROSTATIC COMB DRIVE MICRO-MIRROR FOR LASER SCANNING DISPLAY

Electrostatic comb drive micro-mirror has limitation of high operation volt- age, which has limited its practice use. Recent developments in decreasing operation voltage are promising for mobile micro-mirror. Especially, the operation voltage is de- creased substantially by removing the air friction of comb-drive micro-mirror at a high resonant frequency when the mirror is operated at low pressure. Removing simultane- ously the air friction and anchor loss, electrostatic comb-drive micro-mirror operating at a few voltages at a high resonant frequency becomes possible. This paper presents our re- cent developments as well as emerging techniques introduced in literature for decreasing the operation voltage of electrostatic comb drive micro-mirror. Methods for decreasing the operation voltage at large rotation angle and high scan frequency for application in the laser scanning display are focused to discuss in this paper. Keyword: Micro-mirror, vertical electrostatic comb drive, air damping, Q factor.
NONLINEAR FEM APPROACH TO THE ANALYSIS OF THE HYDROELASTIC B EHAVIOUR OF FLOATING BEAMS

A numerical examination is presented of the response of floating elastic beams to regular and irregular waves. The mathematical approach described is applicable to problems in VLFS hydroelasticity and sea-ice/wave interactions. Finite element methods are applied to the 2D time-dependent hydroelastic problem, both within the beam and in the potential flow. The formulation is designed to allow interchangeable beam models and, in particular, to include nonlinearity. Comparisons of linear and nonlinear models are shown for moderate wave steepnesses.
Accuracy-Complexity Trade-Off for the Signal Reconstruction of Multifunctional Sensors

The on-chip signal reconstruction method based on B-spline approximation and Extended Kalman Filter (EKF) for multifunctional sensors has been studied previously. In this paper, we focus on the design for reducing the complexity of the reconstruction method without significant loss of reconstruction accuracy. The two-objective optimization design framework is proposed, where the reconstruction accuracy and complexity are considering as two conflicting costs to be decreased jointly. Genetic Algorithm (GA) is presented to achieve the accuracy-complexity trade-off by optimizing the B-spline structure parameters, i.e. the dimensions of knot vectors. The experimental results show that the proposed method provides a good improvement to the B-spline and EKF based on-chip signal reconstruction method.