Miracle-dz/UniFAR-FTUs huggingface dataset:
Compact Phase Shifter for 4G Base Station Antenna

This paper presents the design results of compact phase shifter for base station antenna. A phase shifter consists of power divider, phase distribution line, and slider for phase shifting. The compact size is realized by laminating of power divider and phase distribution line. The return loss is under -18 dB for whole frequency band. Insertion loss is also under the - 0.5 dB. Proposed phase shifter shows good performance and stability.
Classification of Atrial Fibrillation with Pre-Trained Convolutional Neural Network Models

Atrial Fibrillation (AF) is the most common chronic arrhythmia. Effective detection of the AF would avoid serious consequences like stroke. Conventional AF detection methods need heuristic or hand-crafted features extraction. Recently, deep learning (DL) techniques with massive data have been used on image, voice and other field widely with impressive results. The ECG rhythms such as AF, normal, Noisy and other rhythms have been segmented into 3 segments per rhythm, converted into 2D images using short time Fourier transform (STFT) and fed into pre-trained models. The pre-trained CNN models are used for transfer learning or are fine tuned for the detection and classification of the AF rhythm. The features extracted from the last layer of the pre-trained models are used as input to classical classification algorithms such as Ensemble classifier and support vector machine (SVM) for AF detection. The proposed approach would be have great potential on real-time monitoring of atrial fibrillation signal in electrocardiogram. Overall, our approaches achieved accuracy, sensitivity and specificity as of 97.89%, 97.12% and 96.99% similar to the latest state of the art techniques but with more flexibility.
On the Coding of Chipless Tags

It is believed that chipless tags, often printable, will play a fundamental role for radio frequency identification technology to replace the currently widely used barcode technology. An application scenario of chipless tags that raises concerns is that the object attached with a chipless tag can be bent and even folded or crumbled. In this case, it is very difficult to identify the tag identity (ID) since some peaks or notches, which reflect the information encoded in the tag ID, in the radar cross section of the tag may disappear. In this paper, we propose to insert some error-correcting bits to the code of tag ID to improve the reliability of identifying chipless tag IDs. An error-detection channel model for dealing with this problem is developed. It is found that the channel model is asymmetric. Several error-correcting codes, namely Golay, BCH, and majority-rule-based multiple interrogations, are proposed to apply to the chipless tag encoding/decoding problem. Some performance indices of these codes, namely successful reading rate and expected successful interrogation times, are analyzed. The asymmetric property of the channel model entails the performance analysis to be conducted in a different way from the literature. Numerical and simulation results are presented to show the effectiveness of the proposed methods.
Control and State Estimation of the One-Phase Stefan Problem via Backstepping Design

This paper develops a control and estimation design for the one-phase Stefan problem. The Stefan problem represents a liquid–solid phase transition as time evolution of a temperature profile in a liquid–solid material and its moving interface. This physical process is mathematically formulated as a diffusion partial differential equation (PDE) evolving on a time-varying spatial domain described by an ordinary differential equation (ODE). The state-dependency of the moving interface makes the coupled PDE-ODE system a nonlinear and challenging problem. We propose a full-state feedback control law, an observer design, and the associated output feedback control law of both Neumann and Dirichlet boundary actuations via the backstepping method. Also, the state-feedback control law is provided when a Robin boundary input is considered. The designed observer allows the estimation of the temperature profile based on the available measurements of liquid-phase length and the heat flux at the interface. The associated output feedback controller ensures the global exponential stability of the estimation errors, the ${\mathcal H}_1$-norm of the distributed temperature, and the moving interface at the desired setpoint under some explicitly given restrictions on the setpoint and observer gain.
On the Existence of a Solution to a Spectral Estimation Problem à la Byrnes–Georgiou–Lindquist

A parametric spectral estimation problem in the style of Byrnes, Georgiou, and Lindquist was posed in <xref ref-type="bibr" rid="ref1">[1]</xref>, but the existence of a solution was only proved in a special case. Based on their results, we show that a solution indeed exists given an arbitrary matrix-valued prior density. The main tool in our proof is the topological degree theory.
Novel Continuous Beam Scanning Leaky-Wave Antennas Using 1-D Mushroom Structure

Novel continuous backward-to-forward beam-scanning leaky-wave antennas (LWAs) are designed using a 1-D mushroom structure. An effective method is proposed to suppress the bandgap of a mushroom structure. A smooth transition between the backward and forward leaky modes is achievable by choosing a suitable value of the via inductance, and hence the antenna has design flexibility. The study starts from an equivalent circuit of a unit cell and is verified through simulation and measurement. The measured results confirm a continuous 126° beam scan, starting from −60°, with less than 3 dB gain variation. Moreover, the measured 3dB gain bandwidth is over 58%, which is better than most of the reported LWAs.
The IEEE 1918.1 “Tactile Internet” Standards Working Group and its Standards

The IEEE “Tactile Internet” (TI) Standards working group (WG), designated the numbering IEEE 1918.1, undertakes pioneering work on the development of standards for the TI. This paper describes the WG, its intentions, and its developing baseline standard and the associated reasoning behind that and touches on a further standard already initiated under its scope: IEEE 1918.1. 1 on “Haptic Codecs for the TI. ” IEEE 1918.1 and its baseline standard aim to set the framework and act as the foundations for the TI, thereby also serving as a basis for further standards developed on TI within the WG. This paper discusses the aspects of the framework such as its created TI architecture, including the elements, functions, interfaces, and other considerations therein, as well as the novel aspects and differentiating factors compared with, e.g., 5G Ultra-Reliable Low-Latency Communication, where it is noted that the TI will likely operate as an overlay on other networks or combinations of networks. Key foundations of the WG and its baseline standard are also highlighted, including the intended use cases and associated requirements that the standard must serve, and the TI’s fundamental definition and assumptions as understood by the WG, among other aspects.
A MIMO Dual-Polarized Antenna Array for Small Cell Application

This paper presents a MIMO dual-polarized antenna array with high antenna gain performance for small cell application. The proposed antenna is a $4\times 4$ antenna array that formed by 16 patch elements, two antenna ports, two feeding network circuits and a PCB with ground plane. This array antenna can provide wide operating band covering the 4800-5900 MHz met 5G (sub 6GHz) and ISM 5 GHz bandwidth requirement, and has two high directivity radiation patterns at V/H polarization plane individually and has two antenna ports to support $2\times 2$ MIMO system application. This antenna has a low profile of 2.8 mm, and the whole size is $198\times 198\times 2.8\mathrm{m}\mathrm{m}^{3}$, that can easily mount on indoor wall or ceiling. Details of design considerations of proposed antenna and experimental results are presented and discussed.
Fractal Organization: Preparing for the Factory of the Future

This paper presents the implementation of a fractal organization and offers managerial lessons from a real industrial company that has several factories clustered by geographic groups. The managerial context is a classic hierarchical organization. To manage the increasing complexity surrounding the company, a new organization is being implemented. This case study describes the as-is and to-be situation, highlighting the specific issues and challenges encountered. Finally, some managerial lessons are presented that point out the strengths and potential risks of a fractal organization.
Terminal Automation System: Automation Solution in the Oil and Gas Industry

Currently the use and application of technology in every company's operational activities has changed the way companies conduct their business. With the use of technology, business competition is increasing, companies in this case petroleum industry are competing to improve the quality of the distribution process. Effectiveness and efficiency of the operational process of distribution become an essential role in contributing the company's profit. During this time Enterprise Resource Planning (ERP) has been widely used in implementing the company's operational supply chain process. However, the use of ERP itself still has a lot of obstacles and limitations, especially for operational activities in the field where there are various separate software and hardware that must be integrated. This article discusses how the integration solution between ERP and operational supply chain in Tank Terminal called Terminal Automation System (TAS). The purpose of this article is to find out how to design the terminal automation concept and its implementation with the use of technology trends such as Big Data Analytics and Internet of Things. It is useful for similar companies in improving the quality of their distribution such as utilization, productivity, and safety through appropriate systems and technology integration solutions.
Effets de la prostaglandine D₂ (PGD₂) sur les réponses inflammatoires et cataboliques dans les chondrocytes humains

Prostaglandins are generally considered to be potent pro-inflanirnatory mediators, as indicated by the term «non-steroidal anti-inflammatory drugs» used to describe pharmacological agents that block the biosynthesis of prostaglandin. In particular, prostaglandin D2 (PGD2) exerts pro-inflammatory and anti-inflarnmatory effects by binding and activating two distinct G-protein-coupled receptors, narnely DP-l and CRTH2. depending on cellular type and disease. Nevertheless very few studies have been done on the implication of PGD2 on the regulation of inflammatory and catabolic responses in human OA. Moreover, interleukin-1 f3 (IL-1 f3) plays a crucial role in the physiopathology of OA by inducing chondrocytes, the only cellular type of cartilage to produce an excessive level of matrix metalloproteinases (MMP5) and nitric oxide (NO). The latter are involved in the degeneration of cartilage. The objectives ofthis research project are, on the one hand, to determine the effects of PGD2 on IL-1f3 induction of MMP-1, MMP-13, inductible nitric oxide synthase (iNOS) expressions, and NO production. On the other hand, to examine by which mechanisms PGD2 has these effects: stimulation of PGD2 membrane receptors, and MAPKs and NF-icB signaling pathways.
V-Band Planar Helical Antenna using TGSV Technology

This paper presents a design of V-band planar helical antenna using tungsten-coated through glass-silicon via (TGSV) structure technology. Proposed antenna is designed on borosilicate glass substrate having much lower dielectric loss than silicon at high frequencies. Proposed antenna has very low profile of 1.6 $\lambda_{0}$ at center frequency with substrate thickness of 0.07 $\lambda_{0}$. A 3.5-turn helical antenna with 7 tungsten-coated silicon vias and total 6 connecting arms is designed with microstrip feed line having a 10-dB impedance bandwidth of 50.7 to 63.4 GHz. Proposed antenna is on-chip design and serves as best candidate to be well integrated with installations, either as square or rectangular structures. Proposed applications are mm-wave radar imaging and tracking.
Self-Assembled InAsP and lnAlAs Nanowires on Graphene Via Pseudo-Van Der Waals Epitaxy

Vertically-aligned, high aspect ratio In $\text{InAs}_{y}\mathrm{P}_{1-y}, \text{In}_{x}\text{Al}_{1-x}\text{As}$, and core-shell InAsP-InP nanowires (NWs) are grown directly on two-dimensional (2-D) monolayer graphene via seed-free pseudo-van der Waals epitaxy (vdWE), as reported here for the first time. Growth is achieved using metalorganic chemical vapor deposition (MOCVD). By altering growth temperature and molar flow ratio of precursors, the composition Of $\text{InAs}_{y}\mathrm{P}_{1-y}$ NWs can be tuned within the $1\leq y\leq 0.8$ range. Similarly, by tuning the group-III precursor flow rates, $\text{In}_{x}\text{Al}_{1-x}$ As composition can be modified in the $1 < x < 0.5$ range. NW morphology and NW array number density variances are measured for different ternary compositions as functions of precursor flow rates and growth temperature.
Broadband-Multiband Antennas Enabling Capacity & Security for Mobile Wireless 5G and Beyond

A solution for antenna needs in upcoming 5G mobile wireless is presented. It is based on employment of broadband multiband antennas, including wide-scan mmWave phased arrays. This new approach is indispensable not only in dealing with the high capacity and data rates, but also in enabling physical-layer security in the cyberspace, for 5G and beyond. The discussions are focused on smartphones, where the design is by far more complex, difficult, and costly due to their small size. A feasibility study has been performed by breadboard experimentation; the results so far are highly promising.
A Coupled-Feed Monopole Antenna for UHF RFID Reader Application

A monopole antenna working in the ultra-high frequency band (UHF) at 915 MHz is proposed. To achieve good excitation at UHF RFID band, two slits are loaded into the radiating element of the antenna, while this antenna is standing vertically on a small ground. To improve the operating bandwidth of this monopole antenna, the coupled-feed technique is applied. Besides demonstrating a small planar size of 80×64 mm2 the proposed antenna monopole UHF RFID antenna has also exhibited 10-dB impedance bandwidth of 3.6% (897-930 MHz) and realized gain of >0.5 dBi.
Multiphysics Analysis of Pin-Socket Electrical Dynamic Contact Susceptibility Under Vibration Stress

The pin-socket connector susceptibility under vibration stress constitutes one of the electrical engineer breakthroughs. Only single electrical engineering is not enough to treat this challenging issue. The Multiphysics analysis is expected to be a solution to analyze this electromechanical dynamic pin-socket structure. This paper develops a dynamic contact Multiphysics analysis with the tensorial analysis of networks (TAN) formalism. The Multiphysics model integrates the pin relative velocity and position coupled with the instantaneous contact resistance implemented in an RC-network. An innovative method enabling to determine the vibration stress signature via the signal-to-noise (SNR) amplitude is established. The relevance of the Multiphysics TAN model is illustrated with an example of a 10-mm-length pin-socket under arbitrary waveform uniaxial vibration stress with 20-kHz bandwidth. It was shown that the contact resistance may fluctuate with more than thousand-time relative variation. More importantly, the vibration stressed pin-socket SNR in function of the RC-network parameters is discussed. The proposed Multiphysics analysis can be potentially applied to the electromagnetic compatibility and signal integrity investigation of assembled electronic equipment and printed circuit boards under vibration stress.
Low-profile Unidirectional Pattern Antenna Composed of Two Gate-Shaped Elements

This paper proposes a low-profile unidirectional pattern antenna using two gate-shaped elements. It composed of a fed element and parasitic elements, unidirectional pattern having main radiation in the direction of the feed element is produced. Excellent gain is realized by introducing the gate- shape antenna having a null in the zenithal direction. Basic antenna characteristics are simulated by using FDTD method, and it is shown that the condition to produce unidirectional pattern is that the parasitic element is excited in the same amplitudes with 90° phase difference against the feeding element.
Characterization of Human Body Shadowing Loss at 2.5 GHz and 5.8 GHz in an Indoor Environment

The Human Body Shadowing (HBS) loss is evaluated, through the frequencies, 2.5 GHz and 5.8 GHz, comparing HBS' width (Ws) calculated by knife-edge method, Finite Difference Time Domain (FDTD) analysis and measurements, with the size of the first Fresnel zone. We present the HBS loss in a single human moving environment and in a multiple human random walk environment.
Detection of Behavior Patterns through Social Networks like Twitter, using Data Mining techniques as a method to detect Cyberbullying

Social networks such as Twitter or Facebook have revolutionized the communication mechanism between human beings, but have also generated a negative impact due to inappropriate use, this fact is perpetuated by cybercriminals to hurt other people psychologically, these bad practices are called cyberbullying. This research focuses on the detection and analysis of cyberbullying on pages and with pejorative terms in Spanish, taking advantage of the power of classification of feelings through specialized tools. For the detection of cyberbullying, first the efficiency of classification of each tool is measured, through a set of pejorative terms commonly used to hurt other people. In the analysis stage we use data mining techniques to generate a dictionary of pejorative terms that are related to cyberbullying and thus be able to generate behavior patterns of these terms. And in this way provide better tools so that psychology specialists can optimize their work. The results show which platform is more flexible, also shows which is best suited to the search of incidences of cyberbullying on Twitter.
Development of Intelligent Behaviors for Social Robots via User-Friendly and Modular Programming Tools

The expected adoption of robots able to interact with people in real-world scenarios brings the need to move from easy-to-use to easy-to-develop robot architectures. In this paper, we discuss how a component-based methodology, a block and web-based interface, and a behavior tree approach to the development of robot behaviors can be used together to enable the adoption of the end-user development (EUD) paradigm. The proposed framework (i) mainly uses easy-to-install, cross-platform and modular tools, (ii) is ROS, ZeroMQ and nanomsg compatible, (iii) enables the creation of platform-independent applications, and (iv) can be easily expanded with new sensory devices or robots. In order to evaluate the proposed software framework, an example of a human-robot interaction application using a NAO robot is presented and discussed.
Event-Triggered Control of Nonlinear Systems With State Quantization

This paper studies event-based control of nonlinear systems with state quantization. Two configurations of the event-based quantized controller are considered: Quantization after sampling and quantization before sampling. The considered quantizer is assumed to have a finite quantization range. With input-to-state stability (ISS) tools, new event-triggering, and dynamic quantization mechanisms are designed to deal with the interaction of the quantizer and the sampler. For both of the configurations, infinitely fast sampling, and in particular the Zeno phenomenon, is avoided. And the system state asymptotically converges to the origin, if a growth condition is satisfied by the ISS gain of the controlled system.
High-aspect-ratio Sub-2-μm Vias Using Thermal Imprint with Build-up Resin

We developed a fabrication method of high-aspect-ratio fine vias with a build-up resin. The build-up resin composed of a thermosetting resin and silica fillers has low coefficient of thermal expansion and low dielectric constant. Thermal imprint was performed to form the high-aspect-ratio fine via holes on the build-up resin. The imprint mold with high-aspect-ratio fine pillar patterns was fabricated by photolithography and deep reactive ion etching. The residual layer consisted of the thermosetting resin and the silica filler was removed by O2/CHF3 plasma etching. The via of 1.2 µm in diameter with aspect ratio of 5.5, and 5.0 µm in pitch was successfully fabricated followed by Au electroplating. The proposed fabrication method is applicable for high-density 3-dimensional and 2.5-dimensional integration technologies.
On Time-Domain Expressions for Calculating the Horizontal Electric Field From Lightning

This paper analyzes three time-domain expressions for the surface impedance, which allows the calculation of the horizontal electric field produced by a lightning return stroke. They are the expression obtained by Barbosa and Paulino directly in the time domain, the expression obtained by Andreotti et al. as a time-domain counterpart of the Cooray–Rubinstein formula, and an approximate expression derived independently from the two former expressions. The analysis is carried out by comparing the kernels of the expressions and by comparing the lightning-induced voltages (LIVs) on an aerial line. The results show that the two former expressions provide almost identical LIVs, while the approximate one provides peak values from 5% to 7% lower than those provided by the other expressions. A detailed discussion of the results is included in the paper.
Chip-to-chip copper direct bonding in no-vacuum ambient using (111) oriented nano-twinned copper

In this study, we demonstrate the chip-to-chip copper direct bonding by using (111) oriented nano-twinned copper in N2 ambient, without vacuum. A well bonded interface in the Cu-to-Cu joint was identified by the focus ion beam (FIB) microstructure observation. The secondary electron images (SEI) showed a void-less bonding interface within the bonded Cu joint. In addition, a die shear test was conducted. The test result revealed that the Cu joint has a robust bonded Cu structure due to its high value. The shear strength is more than 100 MPa. There is nearly twice strength value higher than the traditional SnAg solder joint (64 MPa). In addition, the scanning electron microscope (SEM) image showed the joint fractured in a ductile manner. Besides, we also performed the resistance measurement by using Kelvin probes on the bonded chip-to-chip test vehicle. The result showed 4.12 mΩ in single joint resistance and 4.26 × 10−8 Ω•cm2 in contact resistivity. More than 30% resistance reduction has been confirmed as compared to the traditional SnAg solder joint (6.32 mΩ). Moreover, for further post annealing process on the bonded test vehicle, we can further reduce the joint resistance by the value of 2.9 mΩ. It approaches the value of bulk Cu. The evidences revealed that the Cu-to-Cu joint is superior to the traditional SnAg solder. In last, the chip-to-chip copper direct bonding by using (111) oriented nano-twinned copper in N2 ambient was achieved.