Miracle-dz/UniFAR-FTUs huggingface dataset:
A Compact Low-Noise Frontend for Rx/Tx-Integrated SatCom Arrays

This contribution reports a frontend architecture in printed circuit board (PCB) technology for phased array antennas at K/Ka-band. It consists of a diplexer with low insertion loss, a low noise amplifier (LNA), and a bandpass filter. Two-tone measurements are carried out to identify the linear operating range of the LNA, which determines the maximum allowable output power of the power amplifier (PA). Simulated and measured results of the individual passive components are presented. The experimental characterization of the frontend yields a noise figure of 2 dB and an isolation of 70 dB. The whole setup is suitable for phased arrays as it complies with the required half-wave spacing at 30 GHz.
Defect and Tension Detection of Magnetostrictive Longitudinal Guided Wave for Steel Strip

The traction technology used in elevators has gradually changed from wire ropes to steel strips, which are composed of rubber and multiple steel wire ropes. Traditional detection methods can only detect defects in the rubber surface but not in the internal wire ropes. At present, there is no effective way to realize nondestructive testing of steel strips. Therefore, a magnetostrictive longitudinal guided wave sensor is designed in this paper for the nondestructive testing of elevator steel strips. The design of the sensor is determined by comparing different longitudinal guided wave sensor structures through simulation. Changes in the natural frequencies of a steel strip are used to monitor changes in its tension. Finally, the proposed sensor is verified to be able to detect defects in steel strips.
Millimeter-Wave E-plane Transmission Lines in Multi-layer Substrate

In this work, two kinds of millimeter-wave E-plane transmission lines in multi-layer dielectric substrate and their transitions to the hollow waveguide are proposed and investigated. The transmission lines of E-plane SIW and finline in multi-layer dielectric substrate show advantages of low transmission loss and low profile, which are useful to design antennas and circuits in the millimeter-wave band. In the E-plane SIW structure, four dielectric substrates are stacked to compose an E-plane SIW. The utilization of thin dielectric substrates can control the cutoff frequency of E-plane SIW and significantly reduce leakage power of horizontal polarization between via holes. In the finline structure, a planar transmission line in E-plane is constructed by a slot line inserted in the middle metal pattern between two dielectric substrate layers. The finline is bounded within a closed structure composed of double-layer substrate and two rows of via-hole arrangement, therefore, low dispersion and low radiation loss can be expected in the finline performance. Waveguide transitions are designed for both transmission lines. The dimensions of the transitions were optimized by electromagnetic analysis of the finite element method at 76 GHz. Transmission loss of E-plane SIW and finline was 0.47 dB/cm and 0.3 dB/cm, respectively. Insertion loss of the waveguide-to-E-plane SIW transition and the waveguide-to-finline transition were approximately 0.17 dB.
Attaining High Efficiency with Low Voltage Gain: Performance Evaluation of the Proposed DC-DC Buck Converter

DC-DC buck conversion is a process which accurately transforms high voltage input to low voltage output. Thus, creating opportunities to downsize heat and concurs for smaller apparatus to be constructed as competent power conversion lengthens battery life. To achieve higher capability in reaching low voltage gain, the proposed converter exists of three inductors instead of two inductors of the traditional converter. The proposed converter uses inductors and output capacitor in the circuit from source (DC) to load resistor, for transferring energy and also reducing the voltage range to the output for acquiring efficiency that is higher than conventional one. The overall performance and efficiency is found superior of the proposed converter to the conventional converter based on simulation, investigation and experiment under both OFF and ON state conditions.
A High Efficiency Compact Class F GaN MMIC Power Amplifier for 5G Applications

A high performance compact MMIC class F power amplifier is demonstrated for 5G small cell applications by a 0.25-μm Gallium Nitride (GaN) High Electron Mobility Transistor (HEMT) technology. Both the 2nd and 3rd harmonic terminations are considered in the output matching network, and optimized utilizing the backside via parasitic inductance. Also, the device drain-source parasitic capacitance is considered together into the matching circuit for improving the bandwidth and high frequency operation. The measured peak output power Pout of the amplifier is 36.6 dBm at 6 GHz. Also, the measured peak power-added-efficiency (PAE) at a 1.5 dB gain compression is 65.8 %. Also, the measured 3-dB bandwidth is 1800 MHz. The design has a chip size of only 2.56 mm2.
Machine Translation Evaluation using Textual Entailment for Arabic

Textual entailment is a generic task aiming to capture semantic inference between two text fragments. It has been applied so far to improve many natural language applications such as Question Answering and Information Extraction for the English language. This work aims to exploit results obtained for Textual Entailment in machine translation evaluation to Arabic. We show that the output of a system built for textual entailment recognition for Arabic can be used to serve as a metric to evaluate machine translation into Arabic. Despite the simplicity of the concepts and techniques. , this metric has realized competitive results in comparison to state-of-the-art tools in terms of correlation with human judgments.
Design of 94-GHz Wideband Waveguide-Feed Patch Antenna and Array in eWLB Package

This paper presents a 94-GHz wideband waveguide-feed patch antenna and array in embedded wafer level ball grid array (eWLB) package. Patch antenna in package is firstly designed, then of 1×4 antenna array. For antenna testing convenience, waveguide feeding other than probe one is utilized in this work. The transition from chip to waveguide for full W- band is proposed. Broadband impedance matching is realized by properly designing transmission line, E-plane probe on PCB, and back-short. The layout of antenna, package, board, and waveguide is necessary considered since the radiation pattern is affected by the feeding network. The results show that the proposed Waveguide-feed antenna can pave the way to radio image application.
Thermal Probe Measurements of the Glass Transition Temperature for Ultrathin Polymer Films as a Function of Thickness

The glass transition temperature of polystyrene and poly(methyl methacrylate) films on polar and nonpolar substrates was measured as a function of thickness using a thermal probe in contact with a polymer film. Using a technique called local thermal analysis, heat loss into the film was monitored as the temperature of the probe was ramped from ambient temperature to temperatures as high as 200 °C. The glass transition temperature was determined from a change in slope in the heat loss versus temperature plot. The Tg of polystyrene on silicon oxide decreased by as much as 25 °C below the bulk value for films 13 nm thick. The same trend in the glass transition temperature was observed for polystyrene films on silicon oxide treated with hexamethyldisilizane (HMDS). The Tg of poly(methyl methacrylate) on silicon oxide increased by up to 7 °C above the bulk value for films 18 nm thick. For poly(methyl methacrylate) on silicon oxide treated with HMDS, the Tg decreased by 10 °C below the bulk value for films 21 n.
Spatial Implications of Telecommuting

If the 2020 surge in working from home became permanent, how would the distribution of jobs and residents within and across U.S. cities change? To study this question, we build a quantitative spatial equilibrium model of job and residence choice with commuting frictions between 4,502 sub-metropolitan locations in the contiguous U.S. A novel feature of our model is the heterogeneity of workers in the fraction of time they work on-site: some workers commute daily, some always work at home, while others alternate between working on-site and remotely. In a counterfactual where remote work becomes more common, residents move from central to peripheral areas within cities, and from large coastal to small interior cities, on average. The reallocation of jobs is less monotonic, with increases both in peripheral locations and in the highest-productivity metropolises. Agglomeration externalities from in-person interactions are crucial for welfare effects. If telecommuters keep contributing to productivity as if they worked on-site, better job market access drives considerable welfare gains, even for those who continue to commute. But if productivity declines in response to the reduction in face-to-face interactions, wages fall and most workers are worse off.
Incorporation of Spirulina platensis on Traditional Greek Soft Cheese with Respect to Its Nutritional and Sensory Perspectives

Spirulina platensis, the most popular microalgae species known for its high protein content and bioactive compounds such as phycocyanin and allophycocyanin, has been studied for cheese fortification. Incorporation of spirulina in dairy products poses major sensorial challenges due to its characteristic odor and its insolubility in food formulation, thus limiting consumer acceptance. The main objective was the production of a novel spread cheese fortified with spirulina, so powdered spirulina was added at different concentrations (0.25, 0.5, and 1%), and the effect on physicochemical, microbiological, and sensory characteristics was assessed. Cheese samples were examined for pH, fat (Gerber-Van Gulik method), salt (Volhard method), protein (Kjeldahl), and moisture content by drying to constant weight at 102 ± 1 °C. Cheeses were also assessed organoleptically by five experienced panelists. Generally, the addition of spirulina slightly increased the protein content and affected the color of the cheeses. The cheeses achieved a good microbiological profile and were all characterized as acceptable for consumption by the panelists. However, the cheeses with 0.25 and 0.5% spirulina were mostly preferred by the evaluation panel due to the less intense characteristic odor and taste of spirulina. We conclude that it is possible to produce an acceptable spread cheese with the addition of spirulina without significant changes in the cheese production line.
Microtubule-active drugs: mechanism of action and resistance Mikrotubulární jedy: mechanismus účinku a rezistence

Microtubular cytoskeleton represents a target for a myriad of diverse chemical compounds, referred to as microtubule-active drugs. Produced by certain plants, animals or microbes, the substances often effectively elicit cell death – especially in animals and also in plants to a certain extent, but never in species which produce them to defend against their predators. Nowadays, several microtubule-active substances constitute hallmarks of anti-cancer treatment and agricultural weed control. There is an enormous sum of knowledge about the action of paclitaxel (taxol), vinca alkaloids and colchicine, three best-known microtubule-active compounds used in medicine, and new research often challenges the previously accepted theories. This work investigates the mechanism of action of microtubuleactive drugs from the angle of biochemistry and cell biology, as well as from the physiological standpoint. Effects on microtubule levels and dynamics and the path towards the cell death are reviewed. In the last chapter, attention is given to drug activity in both animal and plant bodies and, finally, to drug-producing plant species which often show substantial resistance.
Clinical value of serum NT-proBNP level in the diagnosis of rheumatoid arthritis with cardiac insufficiency

Objective: To investigate the clinical value of serum sputum end-type natriuretic peptide (NT-proBNP) level in the diagnosis of rheumatoid arthritis (RA) with cardiac insufficiency. Method: A total of 419 patients with RA and cardiac insufficiency admitted to Rui Jin Hospital affiliated to Shanghai Jiao Tong University School of Medicine from June 2016 to June 2017 were included. (1) Analysis of the correlation between the patients’ basic characteristics, such as age and gender, and the NT-proBNP level; (2) Analysis of the correlation between the NT-proBNP level and cardiac function indexes, left ventricular ejection fraction (LVEF) and TDI-Tei; (3) Analysis of the correlation between the NT-proBNP level and Rheumatoid related factors, such as Anti-citrullinated fibrinogen (ACF) and anti-cyclic cirullinated peptide (CCP resistance); (4) The application of NT-proBNP level in the prognostic evaluation of patients with RA complicated with cardiac insufficiency within 2 years for cardiovascular incidence and mortality. Results: The 419 patients were divided into high NT-proBNP group and low NT-proBNP group with 4647 pg/ml as the boundary. Between the two groups, there were no statistically significant differences in age, gender, BMI and vascular risk factors, but in the high NT-proBNP group, cardiac function (P<0.05) and rheumatoid factor levels (P<0.05) were elevated as compared with the low NT-proBNP group. The area under the ROC curve of cardiovascular events in patients with CRS, as predicted according to the NT-proBNP level, was 0.838, while the sensitivity and specificity were 88.9% and 75.0%, respectively. The NT-proBNP level of 4647 pg/ml was used as the cut-off value to establish the incidence curve of cardiovascular events for patients at different levels of NT-proBNP during the 2-year follow-up period by Kaplan-Meier method, and the Log-rank value was 51.673 (P<0.001). Conclusion: The circulating level of NT-proBNP is a prognostic biomarker for patients with RA with cardiac insufficiency.
HIGH ORDER DISPERSIVE ESTIMATES FOR THE SPHERICALLY SYMMETRIC EINSTEIN SCALAR FIELD

for gμν the (Lorentzian) metric, Rμν , R the Ricci and scalar curvature respectively, and Tμν some function of g and its derivatives (for a thorough treatment of this equation, and explanation of Rμν , R and g, see [12]). The principle difference between GR and the Einstein Scalar Field system is the presence of an extra quantity, φ, which one can think of as a massless, non-self-interacting matter field distributed throughout space, which is propagated by the geometry of the system, and we allow to determine Tμν in the following manner.
Explainable stock prices prediction from financial news articles using sentiment analysis

The stock market is very complex and volatile. It is impacted by positive and negative sentiments which are based on media releases. The scope of the stock price analysis relies upon ability to recognise the stock movements. It is based on technical fundamentals and understanding the hidden trends which the market follows. Stock price prediction has consistently been an extremely dynamic field of exploration and research work. However, arriving at the ideal degree of precision is still an enticing challenge. In this paper, we are proposing a combined effort of using efficient machine learning techniques coupled with a deep learning technique—Long Short Term Memory (LSTM)—to use them to predict the stock prices with a high level of accuracy. Sentiments derived by users from news headlines have a tremendous effect on the buying and selling patterns of the traders as they easily get influenced by what they read. Hence, fusing one more dimension of sentiments along with technical analysis should improve the prediction accuracy. LSTM networks have proved to be a very useful tool to learn and predict temporal data having long term dependencies. In our work, the LSTM model uses historical stock data along with sentiments from news items to create a better predictive model.
Micromorphometric study of the small intestines in different post-hatch periods in bronze Turkey (Meleagris meleagris gallopavo).

Yovchev, D. , Penchev, G. , Dimitrov, D. & Stamatova-Yovcheva, K. (2019). Micromorphometric study of the small intestines in different post-hatch periods in bronze turkey (Meleagris meleagrisk gallopavo). Bulgarian Journal of Agricultural Science, 25(3), 552–557 The normal development of the bronze turkey during post-hatch period depends on many factors. Two of the most important are: villus size and crypt size. Otherwise the structural development of the small intestinal epithelium in the birds is important for the normal gut absorption capacity and whole body growth. The aim of our investigation was to study the histological parameters – depth of the crypts and height of the villus in bronze turkeys’ small intestines and the enterocytes’ number in accordance to villus length. The height and width of the intestinal villi increased in age aspect. Both indices in duodenum, jejunum and ileum increased the most intensively till 90th day. The height of intestinal villi in the duodenum for the period from 1st to 90th day increased 3.4 times. The same index reported in the jejunum and ileum was higher, – 5.7 and 6.0 times respectively. The increase in the width and height of the villi corresponded with the increase of the absorption surface. The increase in the width and height of the villi corresponded with the increase of the absorption surface. The fastest growth rates were found for the ileum crypts – 5.4 times. The ratio of the height of the intestinal villi to the depth of the crypts increased from 1st day to 28th day for all segments of the small intestine.
Capillary waves and the mean field theory of interfaces

The relationship of the usual mean field molecular theory of planar interfaces to the capillary wave theory of interfaces is investigated. It is shown that the good agreement between the planar mean field theories and computer simulation of a liquid–vapor interface results from the smallness of the interfacial area chosen for simulation. For an interface of finite thickness, capillary waves lead, through a geometric effect, to a mean square dispersion that is larger than the sum of the intrinsic dispersion of a planar interface and the capillary wave dispersion of a surface. It is shown that the maximum wave vector introduced in capillary wave theory as an arbitrary cutoff parameter is predicted naturally by mean field theory. The implication of capillary wave theory on the possibility of ultralow tensions for fluids far from a critical point is discussed.
Clinical value of three-dimensional speckle tracking echocardiography in evaluating left ventricular function in maintenance hemodialysis patients

Objective: To explore the value of real-time three-dimensional speckle tracking imaging (RT3D STI) in evaluating left ventricular function in maintenance hemodialysis patients. Methods: Eighty patients with maintenance hemodialysis were recruited in this retrospective study, which were divided into observation group 1 (35 cases, dialysis for 6-12 months) and observation group 2 (45 cases, dialysis for at least 12 months). At the same time, 40 healthy medical examiners were selected as the control group. All the patients received two-dimensional (2D) echocardiography and RT3D-STI to measure left ventricular function. Results: Systolic blood pressure, diastolic blood pressure, triglyceride, total cholesterol, low-density lipoprotein, high-density lipoprotein, hemoglobin, serum creatinine and urea nitrogen were statistically different among the three groups (P<0.05). There were no significant differences in age, gender, body mass index and blood glucose among the three groups (P>0.05); there was no significant difference in above parameters between the two observation groups (P>0.05). The 2D echocardiographic parameters (LVDd, IVSd, LVPWd, LVESV, LVEDV, SV, LVEF) of the three groups were statistically different (P<0.05). The LVDd, IVSd, LVPWd, LVESV, LVEDV and SV of the two observation groups were higher than those of the control group (P<0.05), while the LVEF was lower than that of the control group (P<0.05); there was no significant difference in above parameters between the two observation groups (P>0.05). The parameters of RT3D-STI were compared between the three groups: the LVEVD and LVESV of two observation groups were higher than those of the control group, while the LVEF was lower than that of the control group (P<0.05); the LVEVD and LVESV of observation group 1 were higher than those of observation group 2, and LVEF was lower than that of observation group 2 (P<0.05). The GLS, GCS, GAS and GRS of the two observation groups were higher than those of the control group, which in the observation group 1 were higher than those of observation group 2 (P<0.05). Conclusion: Real-time threedimensional speckle tracking imaging can accurately assess left ventricular function in hemodialysis patients, and long-term hemodialysis can improve cardiac function to a certain extent.
Measurement of the critical properties of thermally unstable substances and mixtures by the pulse-heating method

Abstract A method of measuring the critical temperatures and pressures of thermally unstable substances has been developed. The method is based on measuring the temperature of the attainable superheat with the help of a thin wire probe heated with electric-current pulses. With increasing pressure the temperature of the attainable superheat tends to the critical temperature. The authors have obtained a formula by which the dependence of the apparent critical temperature on the heating time is extrapolated to the critical temperature of an undecomposed substance. The results of measurement of the critical temperature and pressure of ethene glycol (ethane-1,2-diol), glycerin (propane-1,2,3-triol), dicumylmethane (di-1-methylethyldiphenylmethane), and (hexadecane + carbon dioxide) are given.
Facing supply chain disruptions: enhancers of supply chain resiliency

Supply chain disruptions are increasingly exerting negative effects on the economic and operational performance of firms. Hence, firms need to ensure business continuity and protect its economic value by enhancing supply chain resiliency. In our paper, we draw on the organizational information processing theory, and we consider the enhancement of supply chain resiliency as an information-based process. We posit that firms can pursue bridging and buffering strategies by implementing supply chain risk management practices and supply chain integration practices. Considering these two strategies will enable the firm to attenuate the high uncertainty resulting from supply chain disruptions through a reduction of the information processing needs of the firm and an increase of its information processing capacity. Analysis of data collected from 283 US and French manufacturers, supports our arguments and offers theoretical and managerial insights. The authors would like to thank the editor John P. Conley and anonymous reviewers for valuable discussions and feedback, as well as the “Association Française pour la Supply Chain et la Logistique"(ASLOG) and its members for their contribution to this study. Citation: Ahmed Hamdi and Tarik Saikouk and Bouchaib Bahli, (2020) ''Facing supply chain disruptions: enhancers of supply chain resiliency'', Economics Bulletin, Volume 40, Issue 4, pages 2943-2958 Contact: Ahmed Hamdi ahmed.hamdi@uir.ac. ma, Tarik Saikouk saikoukt@excelia-group.com, Bouchaib Bahli bahli@ryerson.ca. Submitted: June 26, 2020. Published: November 14, 2020. Submission Number: EB-20-00647 "Facing supply chain disruptions: enhancers of supply chain resiliency. " Ahmed Hamdi International University of Rabat Tarik Saikouk Bouchaib Bahli International University of Rabat Ryerson University