Miracle-dz/UniFAR-FTUs huggingface dataset:
QUADRO-stars: high performance optical WDM star networks

An original approach is proposed to controlling WDM (wavelength-division multiplexing) passive optical stars, termed queuing arrivals for delayed reception operation (QUADRO). In WDM stars the fundamental problem of receiver conflicts leads to severe performance degradation. In current solutions conflicts are prevented by scheduling transmissions or resolved by retransmissions. The proposed approach introduces the concept of resolving reception conflicts by incorporating a delay line receiver design. It thus brings the optical star networks a step closer to all-optical realization. In addition, it allows almost total utilization of the channels, as obtainable until now only by TDM. <<ETX>>
Weighted $L^p$-Hardy and $L^p$-Rellich inequalities with boundary terms on stratified Lie groups

In this paper, generalised weighted $L^p$-Hardy,$ L^p$-Caffarelli-Kohn-Nirenberg, and $L^p$-Rellich inequalities with boundary terms are obtained on stratified Lie groups. As consequences, most of the Hardy type inequalities and Heisenberg- Pauli-Weyl type uncertainty principles on stratified groups are recovered. Moreover, a weighted $L^2$-Rellich type inequality with the boundary term is obtained.
Detection and tracking of prohibition signs in highway

This paper described a method for prohibition signs detection and tracking through the specific color and shape of the prohibition signs in highway.The method of combining color and shape was adopted to detect signs.The first step was to convert the RGB space to HSV space and then extracted red color using the method of syncretizing hue and saturation.The second step was to detect circle through the improved method of extracting area feature parameters and located the prohibition signs.It introduced an improved Kalman filter to track multiple targets in the following-up frames.Experiments with captured videos had good effect on detection and tracking.The result shows that the method can detect the prohibition signs accurately and quickly.
Newly Digital Photovoltaic Array Simulator

The digital photovoltaic simulator presented by this paper is designed in the idea of semi-physical simulation achieving real-time simulation and experiments in the coordinated operation and scheduling between the micro-grid and the large power grid.It is mainly comprised of power electronics circuit and the Tablet PC software simulation which provides the control signal of DSP.The digital photovoltaic simulator can be able to behave electrically similar to PV array but without depending on weather conditions.The experimental results showed that the design of photovoltaic simulator could meet the engineering requirements,and has good static stability and dynamic response capabilities,which could realize the maximum open circuit voltage of 100V,the maximum short-circuit current of 25A and the maximum output power 6KW.
A Similarity Criteria Based Strategy for Concurrent Negotiation

Concurrent negotiation is an important form in multi-agent negotiation system.This paper develops and eval- uates a similarity criteria based strategy for concurrent negotiation in trading environments.By using this strategy,an agent can compute the opponent's preference in concurrent multi-issue negotiation in semi-competitive situations in which there exist information uncertainty and deadlines.The strategy enables the negotiation more effective and increa- ses utilities of the system.
Inertial instability in two-layer flows

Inertial instability occurs in rotating ﬂuid systems when the absolute vorticity takes the oppositesigntotheCoriolisparameterf. Ithasbeenobservedinatmospheresandoceans, particularly near the equator where the latitudinal shear of the zonal winds can exceed f. Most previous studies of inertial instability adopt a continuously stratiﬁed ﬂuid, for which the instability takes the form of overturning cells in the meridional plane. Here we instead study the instability using the zonally symmetric two-layer shallow water equations. We use a momentum-conserving interfacial friction, and show that the linear instability problem is then directly analogous to that of the continuously stratiﬁed system inthelimitofinﬁnitePrandtlnumber. Solutionsforlinearinstabilitiesforauniformshear ﬂow on the equatorial beta plane are given in detail. We then study frictionless nonlinear instabilities, using both weakly nonlinear theory and numerical solutions. On the equatorial β-plane, a third-order system of amplitude equations is derived, and their behaviour is veriﬁed and then extended into a moderately nonlinear regime numerically. On the f-plane, the nonlinear instability of a hyperbolic tangent shear ﬂow is studied. Here the weakly nonlinear analysis requires a different scaling to the equatorial case, and the resulting system of amplitude equations is also different. The properties of this system are studied in depth, and the periodic oscillations that result are interpreted in terms of the evolving linear stability of the mean ﬂow. The results are extended into a moderately nonlinear regime numerically.
Polycrystalline diamond photonic waveguides realized by femtosecond laser lithography

In recent years, the perception of diamond has changed from it being a pure gemstone to a universal high-tech material. In the field of photonics, an increased interest is emerging due to its outstanding optical properties, such as its high refractive index, a spectrally wide transmission window, and high Raman coefficient. Furthermore, the capability to host color defects for room temperature single photon generation makes diamond an attractive platform for quantum photonics. Known as nature’s hardest material, the fabrication and handling of crystalline diamond for integrated optics remains challenging. Here, we report on the fabrication of three-dimensional Type III depressed cladding waveguides in polycrystalline diamond substrates by direct laser writing. Single mode waveguiding is demonstrated in the near-infrared telecommunication C-band. We believe that this enables the fabrication of three-dimensional large-scale photonic circuits, which are essential for advanced classical and quantum diamond photonics.
STABILITY OF THE FUNCTIONAL EQUATION IN FUZZY BANACH SPACES

Different kind of stability have been studied concerning several areas of mathematics and fuzziness of such concepts, which is an extension of the former, are being introduced in recent times. The object of the present paper is to appraise generalization of the Hyers-Ulam-Rassias stability theorem for the functional equation f ( 2 x + y ) + f ( x + 2 y ) = 4 f ( x + y ) + f ( x ) + f ( y ) in fuzzy Banach spaces .
Security Programming with High-Level Abstractions: a Tutorial (Extended Abstract)

The specification of security protocols with high-level programming abstractions, suited for security analysis and verification, has been advocated by the formal methods for security research community. Based on these principles of application design, we developed a tutorial to introduce undergraduate students to the foundations of security programming. The main pedagogical goal of this tutorial is to teach, in a simple and effective way, how to build secure distributed applications using common cryptographic primitives abstracting from their low-level details. The tutorial is aimed at helping the students to grasp quickly the main security concepts and to apply them effectively to the coding of distributed programs implementing security properties like authentication and secrecy. As programming is one of the main skills required by the cybersecurity industry, we believe that this tutorial can contribute to the professional development of future graduates.
Quasiparticle scattering time in niobium superconducting films

We study the quasiparticle energy relaxation processes in superconducting Nb films of different thicknesses corresponding to different electron mean free paths in a state far from equilibrium, that is the highly dissipative flux-flow state driven up to the instability point. From the measured current-voltage curves we derive the vortex critical velocity $v^{*}$ for several temperatures. From the $v^{*}(T)$ values, the quasiparticle energy relaxation time $\tau_{\epsilon}$ is evaluated within the Larkin-Ovchinnikov model and numerical calculations of the quasiparticle energy relaxation rates are carried out to support the experimental findings. Besides the expected constant behavior of $\tau_{\epsilon}(T)$ for the dirty samples, we observe a strong temperature dependence of the quasiparticle energy relaxation time in the clean samples. This feature is associated with the increasing contribution from the electron-phonon scattering process as the dirty limit is approached from the clean regime.
Control‐oriented modeling and robust nonlinear triple‐step controller design for an air‐feed system for polymer electrolyte membrane fuel cells

The efficient operation of polymer electrolyte membrane fuel cells (PEMFCs) significantly relies on the reliable control of air‐feed system. The core control objective in air‐feed system is to track a pre‐defined reference of the oxygen excess ratio to avoid oxygen starvation and stack damage. In this paper, we focus on the modeling of the air‐feed system in a PEMFC and the robust nonlinear controller design for the oxygen excess ratio tracking control. To facilitate the subsequent nonlinear controller design, a specific affine‐like, second‐order, control‐oriented model of oxygen excess ratio dynamic behavior is developed, and the modeling uncertainty is estimated and compensated by using an extended state observer (ESO). The control‐oriented model is verified via a high‐fidelity plant model. A nonlinear controller for oxygen excess ratio tracking control is proposed based on the triple‐step technique which is robust against the system disturbances. The tuning rule of the controller parameters is discussed in the scheme of the linear system. Finally, simulations are conducted to demonstrate the effectiveness and advantages of the proposed controller under variant operating conditions compared with baseline controllers.
Modeling Distributional Time Series by Transformations

Probability distributions play a very important role in many applications. This paper describes a modeling approach for distributional time series. Probability density functions (PDFs) are approximated by real-valued vectors via successively applying the log-quantile-density (LQD) transformation and functional principal component analysis (FPCA); state-space models (SSMs) for real-valued time series are then applied to model the evolution of PCA scores, corresponding results are mapped back to the PDF space by the inverse LQD transformation.
Ulrich bundles on non-special surfaces with $p_g=0$ and $q=1$

Let $S$ be a surface with $p_g(S)=0$, $q(S)=1$ and endowed with a very ample line bundle $\mathcal O_S(h)$ such that $h^1\big(S,\mathcal O_S(h)\big)=0$. We show that such an $S$ supports families of dimension $p$ of pairwise non-isomorphic, indecomposable, Ulrich bundles for arbitrary large $p$. Moreover, we show that $S$ supports stable Ulrich bundles of rank $2$ if the genus of the general element in $\vert h\vert$ is at least $2$.
Computer Security Literacy: Staying Safe in a Digital World

Computer users have a significant impact on the security of their computer and personal information as a result of the actions they perform (or do not perform). Helping the average user of computers, or more broadly information technology, make sound security decisions, Computer Security Literacy: Staying Safe in a Digital World focuses on practical security topics that users are likely to encounter on a regular basis. Written for nontechnical readers, the book provides context to routine computing tasks so that readers better understand the function and impact of security in everyday life. The authors offer practical computer security knowledge on a range of topics, including social engineering, email, and online shopping, and present best practices pertaining to passwords, wireless networks, and suspicious emails. They also explain how security mechanisms, such as antivirus software and firewalls, protect against the threats of hackers and malware. While information technology has become interwoven into almost every aspect of daily life, many computer users do not have practical computer security knowledge. This hands-on, in-depth guide helps anyone interested in information technology to better understand the practical aspects of computer security and successfully navigate the dangers of the digital world.
Hydrogen isotopic anomalies in extraterrestrial organic matter: role of cosmic ray irradiation and implications for UCAMMs

Context. Micrometeorites represent, at timescales shorter than a few million years, the dominant source of extraterrestrial matter at the surface of the Earth. Analyses of ultracarbonaceous micrometeorites recovered from Antarctica, known as UCAMMs reveal an exceptionally N-rich organic matter associated with spatially extended high D enrichments. Experiments show that this specific organic matter might have been formed in the outer solar system by energetic irradiation of N-rich icy surfaces. Aims. We experimentally investigate the hydrogen isotopic fractionation resulting from irradiation of normal and D-rich N2-CH4 ices by high energy ions, simulating the exposition to Galactic cosmic rays of icy bodies surfaces orbiting at large heliocentric distances. Methods. Films of N2-CH4 ices and a N2-CH4/CD4/N2-CH4 “sandwich” ice were exposed to 129Xe13+ ion beams at 92 and 88 MeV. The chemical evolution of the samples was monitored using in situ Fourier transform infrared spectroscopy. After irradiation, targets were annealed to room temperature. The solid residues of the whole process left after ice sublimation were characterized in situ by infrared spectroscopy, and the hydrogen isotopic composition measured ex situ by imaging secondary ion mass spectrometry at the sub-micron scale (NanoSIMS). Results. Irradiation leads to the formation of new molecules and radicals. After annealing, the resulting poly-HCN-like macro-molecular residue exhibits an infrared spectrum close to that of UCAMMs. The residue resulting from irradiation of N2-CH4 ices does not exhibit a significant deuterium enrichment comparable to that found in extraterrestrial organic matter. The residue formed by irradiation of D-rich ices shows the formation of isotopic heterogeneities with localised hotspots and an extended contribution likely due to the diffusion of the radiolytic products from the D-rich layer. Conclusions. These results show that high-energy cosmic ray irradiation does not induce the large hydrogen isotopic fractionation observed at small spatial scale in interplanetary organics. By contrast, large D/H ratio heterogeneities at the sub-micron spatial scale in extraterrestrial organic matter can result from isotopically heterogeneous ices mixtures (i.e. condensed with different D/H ratios), which were transformed into refractory organic matter upon irradiation.
Self-organization in purely viscous non-Newtonian turbulence

We investigate through Direct Numerical Simulations (DNS) the statistical properties of turbulent flows in the inertial subrange for non-Newtonian power-law fluids. The structural invariance found for the vortex size distribution is achieved through a self-organized mechanism at the microscopic scale of the turbulent motion that adjusts, according to the rheological properties of the fluid, the ratio between the viscous dissipations inside and outside the vortices. Moreover, the deviations from the K41 theory of the structure functions' exponents reveal that the anomalous scaling exhibits a systematic nonuniversal behavior with respect to the rheological properties of the fluids.
Tunable Band-Notched High Selective UWB Filtering Monopole Antenna

This communication presents the design, fabrication, and testing of a tunable band-notched UWB filtering antenna. The proposed filtering antenna comprises a semiellipsoid radiator and a microstrip transmission line to cover the UWB communication bandwidth from 3.1 to 10.6 GHz. It also comprises two J-shaped open-ended stubs and an asymmetric T-shaped open-ended stub to create notch bands at 3.5 GHz (WiMAX), 5.2 GHz, and 5.8 GHz (WLAN) in the UWB spectrum. The center frequencies of the notch band are tuned continuously using varactors with percentage tuning of 7.5%, 5.38%, and 3.54%. The prototype is fabricated and experimentally validated.
Deux méthodes statistiques pour la classification et la régression en grande dimension

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Deux méthodes statistiques pour la classication et la régression en grande dimension Stéphane Girard
Compact Integrated Full-Duplex Gap Waveguide-Based Radio Front End For Multi-Gbit/s Point-to-Point Backhaul Links at E-Band

This paper presents the design and realization of a high data rate radio front-end module for point-to-point backhaul links at E-band. The design module consists of four vertically stacked unconnected metal layers without any galvanic and electrical contact requirements among the building blocks, by using gap waveguide technology. The module components are a high-gain array antenna, diplexer, and circuitry consisting of a transmitter (Tx) and a receiver (Rx) monolithic microwave integrated circuits (MMICs) on a carrier board, which is successfully integrated into one package with a novel architecture and a compact form. The diplexer consists of two direct-coupled cavity bandpass filters with channels at 71–76 GHz and 81–86 GHz with a measured return loss of 15 dB and an isolation greater than 50 dB. A wideband $16\times 16$ slot array antenna with a measured gain of more than 31 dBi is used to provide high directivity. The measured results show that the packaged transmitter provides a conversion gain of 22 and 20 dB at 76 and 86 GHz, respectively, with an output power of 14 and 16 dBm at 1-dB gain compression point, at the same frequencies. The packaged receiver shows an average conversion gain of 20 dB at 71–76-GHz and 24 dB at 81–86-GHz bands. A real-time wireless data transmission is successfully demonstrated with a data rate of 8 Gbit/s using 32-quadrature amplitude modulated signal over 1.8-GHz channel bandwidth with spectral efficiency of 4.44 bit/s/Hz. The proposed radio front end provides the advantages of low loss, high efficiency, compact integration, and a simple mechanical assembly, which makes it a suitable solution for small-cell backhaul links.
Reliable exponential 
 H∞ filtering for singular Markovian jump systems with time‐varying delays and sensor failures

This paper deals with the problem of exponential H∞ filtering for singular Markovian jump systems with time‐varying delays subject to sensor failures. The main objective is to design a reliable filtering such that the considered filtering error system in the presence of a time‐varying delay and sensor failures is mean‐square exponentially admissible with a specified decay rate and simultaneously satisfies an H∞ performance. First, the delay interval is partitioned into m subintervals and a novel mode‐dependent stochastic Lyapunov‐Krasovskii functional is constructed. By using the reciprocally convex inequality in each subinterval, sufficient conditions of exponential H∞ performance analysis are developed for the considered filtering error system. Then, based on these conditions, the existence conditions of the desired reliable filter are derived and the filter parameters are obtained. It should be mentioned that all the results presented here are not only dependent on the time delay but also dependent on the decay rate and the partitioning size. Furthermore, all the conditions are established in terms of strict linear matrix inequalities. Finally, two numerical examples are given to illustrate the less conservatism and effectiveness of the proposed methods.
Measurement and calculation of solid-state matrix photomultiplier’s polarization parameters

This paper is devoted to the research of solid-state matrix photomultiplier’s polarization-optical parameters. Maim parameters of SiPM detectors depend on photodetector’s sensitivity. As an object of study, a silicon photomultiplier ARRAY-C 60035-4P was chosen. Detector consists of 4 photosensitive sites. SiPM contains avalanche photodiodes separated from each other by elements that do not participate in the formation of the useful signal and are used for pacifying secondary optical signal. In this work experimental studies of the state of radiation’s polarization reflected from the surface of SiPM matrix’s active regions are performed using ellipsometer LEF-3F-1. The methodic used is a zero method of determining the polarization angles. During experiment the contractions of ellipsometric angles were determined. The experiment was carried out at four angles of incidence on the surface of the receiver, which corresponds to a set of reflective characteristics of a silicon photoelectric multiplier. Using this data, the estimation of distribution of the reflection and transmission coefficients becomes possible, as well as the sensitivity distribution over the different sites of the SiPM.
Minimum-cost Based Data Replication Strategy in Cloud Computing Environment

Data replica management is an important component in cloud storage system,which is important for improving the system reliability and high performance.In general,if the number of replicas increase,the transfer cost will be declined because of the data can transfer more effectively;but the storage cost is becoming large because of the existence of additional replicas.Aimed to reduce the cost of data management,this paper proposed a minimum-cost based data replication strategy in balancing storage cost and transfer cost,including the data management cost model,the necessity of adding data replica and an approximate algorithm that can automatically decide the number and their store places.Both the theoretical analysis and simulations conducted on general(random)data sets as well as specific real world applications with Amazon's cost model show that the minimum-cost replica strategy is close to or even the same as the minimum cost benchmark and the efficiency is very high for practical runtime utilization in the cloud.On the other side,this research can promote the enterprise(user)actively using cloud computing platform and the harmonious development of cloud computing environment.
Type-2 Fuzzy PID Controller Design for Mobile Robot

Autonomous driving of mobile robot is important in various working environments. For its autonomous driving, mobile robot utilized ultrasonic sensor to detect obstacles and avoid them. Also, there have been researches on supplementing function of avoiding crash by using control methods based on adoption of intellectual system. This research has designed type-2 fuzzy self-tuning PID controller which can enhance autonomous driving function of mobile robot under fixed obstacle environment. The fuzzy controller has utilized type-2 with multiple values and the fuzzy self-tuning PID controller adjusting gain value of PID controller is applied. 25 rules have been reduced to 9 rules to improve function of hardware. Type-2 fuzzy self-tuning PID controller is used to compare function of traditional PID controller and Type-1 fuzzy self-tuning PID controller. In terms of function of Type-2 fuzzy controller with reduced number of rules, it was confirmed through improvement in function of autonomous driving of mobile robot using MATLAB/Simulink.