Miracle-dz/UniFAR-FTUs huggingface dataset:
Event-Driven Architecture to Improve Performance and Scalability in Microservices-Based Systems

The microservice architectural style can replace the monolithic architecture because of the flexibility to adapt to changing technologies and helps to better organize the development team. However, in its implementation there are still problems when communication between services in microservices uses HTTP synchronous or based on API-Driven. In addition, scalability and performance need to be considered in a microservice architecture. The solution offered to these problems is to apply container technology which is integrated with Event-Driven Architecture (EDA) (asynchronous) to handle internal communication between microservices. So that the results of this study can overcome the problems of scalability and performance in microservices. EDA response time is faster with a percentage increase of 19.18%, as well as a lower EDA error rate of 34.40%, although EDA CPU usage is higher with a percentage decrease of 8.52% compared to API-Driven Architecture. EDA uses more CPU resources.
Adaptive Loop Filter with a CNN-Based Classification

In this paper, a data-driven generalization of the adaptive loop filter (ALF) of Versatile Video Coding (VVC) is presented. It is shown how the conventional ALF process of classification and FIR filtering can be generalized to define a natural model architecture for convolutional neural network (CNN) based in-loop filters. Experimental results show that over VVC, average bit-rate savings of 3.85%/4.75% and 4.39%/4.33% can be achieved for the all intra and random access configurations in the low- and high-QP settings.
Understanding inclusive innovation in informal economy, a conceptual model

Informal economy size in developing countries, especially in Latin American countries, represents one of the greatest challenges for development, given its relationship with the inequality, the conditions of vulnerability and exclusion of a wide range of the population. The firms, both born and established in informal economy, can be innovative and have the potential to create solutions that have a positively impact well-being of many people in conditions of exclusion, through inclusive innovation processes; However, there are still gaps on how the informal economy agents can participate in dynamic of innovations systems. This makes it difficult to implement strategies and policies that strengthen innovation systems. Therefore, the objective of this work is to propose a conceptual model following the first steps of Agent-based Modeling methodology. This model allows representing the inclusion of informal companies in innovation systems, which will be the basis for future systemic and longitudinal analyses.
Finite element modelling of hybrid active–passive vibration damping of multilayer piezoelectric sandwich beams—part I: Formulation

This work, in two parts, proposes, in this first part, an electromechanically coupled finite element model to handle active–passive damped multilayer sandwich beams, consisting of a viscoelastic core sandwiched between layered piezoelectric faces. The latter are modelled using the classical laminate theory, whereas the face/core/face system is modelled using classical three‐layers sandwich theory, assuming Euler–Bernoulli thin faces and a Timoshenko relatively thick core. The frequency‐dependence of the viscoelastic material is handled through the anelastic displacement fields (ADF) model. To make the control system feasible, a modal reduction is applied to the resulting ADF augmented system. Validation of the approach developed in this part is presented in Part 2 of the paper together with the hybrid damping performance analysis of a cantilever beam. Copyright © 2001 John Wiley & Sons, Ltd.
A random walk in the literature on criminality: A partial and critical view on some statistical analyses and modelling approaches

We are interested in the possible contributions of mathematical modelling of crime. We refer to numerous and quite recent papers that analyse and discuss empirical data in an attempt to discover stylised trends worthy of being understood through simple models. We summarise part of this literature and try to understand the reasons of important discrepancies in their conclusions. Then we present some recent modelling attempts that may help to understand the large variance in the statistical-based conclusions.
Subgroups of HNN groups

The purpose of this paper is to give a more precise form of Theorem 1 of [2], which gives a structure theorem for subgroups of HNN groups; we prove the following. Let H be a subgroup of the HNN group . Then H is an HNN group whose base is a tree product of groups H ∪ wAw-1 where w runs over a set of double coset representatives of (H,A); the amalgamated and associated subgroups are all of the form H ∊ vUiv-l for some v. We can be more precise about which subgroups occur and about the tree product. We will also obtain stronger forms of other results in [1] and [2].
Annexin A2 Loss After Cardiopulmonary Bypass and Development of Acute Postoperative Respiratory Dysfunction in Children

IMPORTANCE AND OBJECTIVES: The primary objective of this study was to determine whether expression of the multifunctional and adherens junction-regulating protein, annexin A2 (A2), is altered following cardiopulmonary bypass (CPB). A secondary objective was to determine whether depletion of A2 is associated with post-CPB organ dysfunction in children. DESIGN: In a prospective, observational study conducted over a 1-year period in children undergoing cardiac surgery requiring CPB, we analyzed A2 expression in peripheral blood mononuclear cells at different time points. We then assessed the relationship of A2 expression with organ function at each time point in the early postoperative period. SETTING: Twenty-three-bed mixed PICU in a tertiary academic center. PARTICIPANTS: Patients 1 month to 18 years old undergoing cardiac surgery requiring CPB. MEAN OUTCOME MEASUREMENTS AND RESULTS: We analyzed A2 expression in 22 enrolled subjects (n = 9, 1–23 mo old; n = 13, 2–18 yr old) and found a proteolysis-mediated decline in intact A2 immediately after bypass (p = 0.0009), reaching a median of 4% of baseline at 6 hours after bypass (p < 0.0001), and recovery by postoperative day 1. The degree of A2 depletion immediately after bypass in 1–23-month-olds correlated strongly with the extent of organ dysfunction, as measured by PICU admission Vasoactive-Ventilation-Renal (p = 0.004) and PEdiatric Logistic Organ Dysfunction-2 (p = 0.039) scores on postoperative day 1. A2 depletion immediately after bypass also correlated with more protracted requirement for both respiratory support (p = 0.007) and invasive ventilation (p = 0.013) in the 1–23-month-olds. CONCLUSIONS AND RELEVANCE: The degree of depletion of A2 following CPB correlates with more severe organ dysfunction, especially acute respiratory compromise in children under 2 years. These findings suggest that loss of A2 may contribute to pulmonary microvascular leak in young children following CPB.
Stress Concentration due to a Hemispherical Pit at a Free Surface of a Thick Plate under All-around Tension

This paper contains a three dimensional solution for the stresses around a hemispherical pit at a free surface of an elastic plate. At infinity the plate is subjected to all-around tension parallel to the free surface. In the analysis, the method of Boussinesq's two harmonic functions approach is used and these functions are expressed in simple forms of cylindrical and spherical harmonics. The boundary conditions both on the upper surface and at infinity are satisfied automatically, while the remaining boundary conditions on the lower surface and on the surface of the pit are satisfied with aid of the Hankel transform and relations between the cylindrical harmonics and the spherical ones. Numerical calculations are carried out for four different values of radius of the hemispherical pit.
THE RATE OF NOVA PRODUCTION IN THE GALAXY.

The ongoing PROBLICOM program in the Southern Hemisphere now makes it possible to derive a reliable value for the overall production rate of Galactic novae. The result, 73±24 y-1, indicates that the Galaxy outproduces M31 by a factor of two or three. The authors estimate that the rate of supernova ejecta is one and a half orders of magnitude greater than that of novae in the Galaxy.
Different types of solutions to a multivalued model of granular flow

We deal with a modification of the Savage–Hutter model describing granular material with multivalued friction force. The multivalued structure of this model requires a modification of known definitions of a solution. The connections between definitions of three different types of solutions: entropy, measure‐valued and kinetic are shown. Copyright © 2013 John Wiley & Sons, Ltd.
Decentralized robust control of uncertain interconnected systems with prescribed degree of exponential convergence

This paper considers the problem of decentralized control of an uncertain interconnected time-varying system which does not satisfy the so-called matching conditions. The uncertainties, which may be decomposed into two portions, a matched portion and a mismatched portion, may appear in the subsystems and also in the interconnections between the subsystems. A robust decentralized control scheme is proposed which guarantees the controlled system to converge exponentially, with a prescribed degree, to a residue set with a prescribed bound when the mismatched portion of the uncertainties satisfies a certain bound condition. >
The velocity dispersion anisotropy and mass-to-light ratio of elliptical galaxies

Axisymmetric dynamical models are constructed for 37 bright elliptical galaxies for which high-quality photometrical, and both major and minor axis kinematical data are available in the literature. The models are of the type used previously by Binney, Davies & Illingworth and van der Marel, Binney & Davies. The projected kinematics are predicted from the observed surface photometry, assuming a constant mass-to-light ratio, and a velocity ellipsoid with σ r =σ θ [i.e. f=f(E,L z )].
Finite Element Modelling of a Synchronous Machine : Electromagnetic Forces and Mode Shapes

Manufacturers in electrical machinery are becoming highly interested in the reduction of noise and vibrations; this is due to the increasing awareness of the problem in some industrial and military applications : one of the main causes of noise production in electrical machines is resonance between the electromagnetic force and the stator. Two fundamental steps are of importance to deal with the acoustic noise reduction problem: -study and assessment of the vibration behaviour of the stator (resonant frequencies, mode shapes.); -analysis of the electromagnetic force distribution. The objective of this paper is to report an advancement of the above works using the finite element method. The results of all previous steps are mentionned and discussed below. For this work we have used a permanent magnet synchronous machine.
Ambisonic Decoder Test Methodologies based on Binaural Reproduction

The comparative evaluation of the quality of different Ambisonic decoding strategies presents a number of challenges, most notably the lack of a suitable reference signal other than the original, real-world audio scene. In this paper a new test methodology for the evaluation of Ambisonic decoders is presented, using a virtual loudspeaker, binaural rendering approach. A sample study using a MUSHRA test paradigm and three different types of Ambisonic decoders was conducted and the results analyzed using a variety of different statistical approaches. The results indicate signiﬁcant differences between decoders for some attributes and virtual loudspeaker layouts.
Experimental verification of power-law non-Newtonian axisymmetric porous gravity currents

Abstract We present a theoretical and experimental analysis of axisymmetric gravity currents of power-law fluids in homogeneous porous media. The non-Newtonian shear-thinning fluid is a mixture of water, glycerol and Xanthan gum ( $n= 0. 33{\unicode{x2013}} 0. 53$ ), and it is injected into a porous layer of glass beads ( $d= 1{\unicode{x2013}} 3~\mathrm{mm} $ ). We compare experiments conducted with constant ( $\alpha = 1$ ) and time-increasing ( $\alpha = 1. 5$ and $2. 0$ ) influxes to theoretical self-similar solutions obtained by the numerical integration of the nonlinear ordinary differential equation that describes one-dimensional transient motion. The theoretical analysis is confirmed by experimental data. In addition, the selection of the most appropriate expression for the tortuosity factor and the choice of the correct range of shear stress for the determination of the rheological parameters are shown to be crucial to obtaining a good fit between the theory and experiments.
Elastoplastic damage modeling of desaturation and resaturation in argillites

The development of a coupled elastoplastic damage constitutive model for argillites is presented. Emphasis is put on the description of post‐failure and coupled hydromechanical behavior of argillites during the desaturation/resaturation processes. A short summary of experimental investigations is given in the first part, which shows an important plastic deformation coupled with damage and a significant influence of water content on the mechanical behavior of argillites. Based on the framework of poroplasticity and continuum damage mechanics, a general constitutive model is proposed for the poromechanical behavior of argillites in both saturated and unsaturated conditions. Main features observed in experiments are taken into account, in particular the elastic degradation due to microcracks, residual strength, coupling between plastic deformation and induced damage, influence of water content on plastic flow, variation of permeability induced by microcracks as well as the deformation generated in the desaturation/resaturation processes. The performance of the model is examined by comparing numerical simulations with test data in representative load paths. Finally, the model is applied to hydromechanical coupling study of four time‐dependent tests subjected to a step change in relative humidity. Copyright © 2009 John Wiley & Sons, Ltd.
Jet-driven molecular outflows from class 0 sources: younger and stronger than they seem?

Context. The momentum, age and momentum injection rate (thrust) of molecular outflows are key parameters in theories of star formation. Systematic biases in these quantities as inferred from CO line observations are introduced through simplified calculations. These biases were quantified for radially expanding flows. However, recent studies suggest that the youngest outflows may be better described by jet-driven bowshocks, where additional biases are expected. Aims. We investigate quantitatively the biases in momentum, age, and thrust estimates in the case of young jet-driven molecular outflows, and propose more accurate methods of determining these quantities. Methods. We use long-duration (1500 yr) high resolution numerical simulations in concert with the standard observational methods of inferring the relevant quantities to quantify the systematic biases in these calculations introduced, in particular, by dissociation, erroneous inclusion of transverse momentum, and hidden material at cloud velocity. Jet/ambient density contrasts of 0.1–1 are considered, leading to bow speeds of 60–135 km s −1 . Results. When mass-weighted velocities are used, lifetimes are overestimated by typically an order of magnitude. The molecular thrust is then underestimated by similar amounts. Using the maximum velocity in CO profiles gives better results, if empirical corrections for inclination are applied. We propose a new method of calculating the lifetime of an outflow which dramatically improves estimates of age and molecular thrust independent of inclination. Our results are applicable to younger flows which have not broken out of their parent cloud. Conclusions. Published correlations between the molecular flow thrust and the source bolometric luminosity obtained with the maximum CO velocity method should remain valid. However, dissociation at the bow head may cause the observable thrust to underestimate the total flow thrust by a factor of up to 2–4, depending on the bow propagation speed and the magnetic field strength. Detailed evaluation of this effect would greatly help to better constrain the efficiency of the ejection mechanism in protostars.
The Nature of the Radio Continuum Sources Embedded in the HH 7-11 Region and Its Surroundings

Using the Very Large Array, we have carried out sensitive radio continuum observations at 6 and 3.6 cm of the HH 7-11 region, detecting a total of 44 radio sources in the 8′ × 8′ region centered at this HH complex. The majority of these sources, at least 26 of them, are believed to be associated with young objects in the cloud. Among these sources are found candidates to power all the CO outflows observed in the region. For the first time, we detect at centimeter wavelengths counterparts to the young objects IRAS 2A, IRAS 2B, ASR 51, ASR 7, MMS 2, and IRAS 4C, and to the foreground G2 IV star BD +30°547. There is a strong correlation between the far-infrared and millimeter sources reported previously and the centimeter sources discussed here. Most likely, this correlation results from the fact that young embedded stars systematically have ionized outflows. Under these assumptions, the far-infrared and millimeter emission will originate from dust heated in the surroundings of the star, while the centimeter emission will come from the ionized flow. However, in two of the sources detected, the centimeter emission appears to have a significant contribution from heated dust. Two of the detected sources are time-variable, circularly polarized sources, and one of them is associated with a previously known T Tauri star. The results of our study suggest that sensitive radio continuum studies of other active star-forming regions could reveal a similar diversity of centimeter wavelength sources.
Gain-frequency-current relation for Pb 1-x Sn x Te double heterostructure lasers

The active region gain expression for Pb 1-x Sn x Te lasers is obtained from the k \cdot p model of the conduction and valence band extrema. Curves of gain versus frequency with current, temperature, and majority carrier concentration as parameters are calculated using published values of the k \cdot p model parameters. In addition, threshold current versus temperature and threshold current versus majority carrier concentration curves are given. A simple expression is obtained for the conductivity effective mass for use in the equation for free-carrier absorption appropriate to the highly degenerate majority carrier concentrations typical of Pb 1-x Sn x Te laser material.
QUENCHING PHENOMENA ASSOCIATED WITH A WATER WALL JET: I. TRANSIENT HYDRODYNAMIC AND THERMAL CONDITIONS

Transient boiling experiments have been performed using a large, preheated test specimen exposed to a water wall jet on its top surface. Temperatures measured at discrete locations on the surface have been used with a solution of the transient heat conduction equation to obtain the temperature field throughout the specimen, as well as the heat flux distribution at the surface. Together with visualization of related two-phase flow conditions, the results yield new insights concerning coexistence of nucleate, transition, and film boiling, as well as single-phase convection, on a surface. Results are presented for jet velocities and subcootings representative of conditions in high-temperature materials processing.
Analytical and Numerical Study of the Reflection/Transmission Coefficients in Slight Viscoelastic Medium

The study done in this paper brings out the effect of the viscoelasticity on the reflection/transmission coefficients. The knowledge of this effect can be useful for several applications, such as enhancing the resolution of the seismic sections, fluid and fracture detection. It can also have other applications different from the geophysical domain, as the study of the bonding between the materials in the civil engineering domain. We use the complex Lame coefficients in the continuity equations at the boundary layers to get the analytical expressions of the reflection/transmission coefficients in viscoelastic media. The coefficients can be divided into two parts, the first part is independent from the quality factor, and it corresponds to the elastic reflection/transmission coefficients. The second part is dependent on the quality factor contrast and it represents the contribution of the viscoelasticity on the reflection/transmission coefficients. From the numerical study it appears that the effect of the viscoelasticity is significant near to the critical angles. This effect is not clear and it is difficult to interpret and we do not know if it has a physical meaning or it is only a mathematical artifact that is why it is better to be far from the critical angles for seismic investigation.
Numerical study on the Effect of Interaction Vaned Diffuser with Impeller on the Performance of a Modified Centrifugal Compressor

This paper is a numerical simulation that was made in the three-dimensional flow, carried out in a modified centrifugal compressor, having vaned diffuser stage, used as an auto-motive turbo charger. Moreover, the performance of the centrifugal compressor was dependent on the proper matching between compressor impeller and vaned diffuser, influencing significantly surge and the efficiency of centrifugal compressor stages. In addition, a modified compressor impeller, coupled with vane and vaneless diffuser, has been found to have similar internal flow patterns for both the vaneless and vaned diffuser design. The vaned diffuser effect has been paid particular attention in terms of better analysis where the diffuser was designed for high sub-sonic inlet conditions. Another aim of this research was to study and simulate the effect of vaned diffuser on the performance of a centrifugal compressor. The simulation was undertaken by using a commercial software, the so-called ANSYS CFX, to predict numerically the performance in terms of pressure ratio, poly tropic efficiency and mass flow rate for the centrifugal compressor stage. The results were generated from CFD and were analyzed for better understanding of the fluid flow through centrifugal compressor stage. Conclusively, it was observed that the effect of the vaned diffuser is to convert the kinetic energy into a high static pressure after analyzing the results of the simulation.
Bias-compensated normalised LMS algorithm with noisy input

A new bias-compensated normalised least mean square (NLMS) algorithm for parameter estimation with a noisy input is proposed. The algorithm is obtained from an approximated cost function based on the statistical properties of the input noise and involves a condition checking constraint to decide whether the weight coefficient vector must be updated. Simulation results show that the proposed algorithm is more robust and accurate than the conventional method.
Applying the MDCT to image compression

The replacement of the standard discrete cosine transform (DCT) of JPEG with the windowed modified DCT (MDCT) is investigated to determine whether improvements in numerical quality can be achieved. To this end, we employ an existing algorithm for optimal quantisation, for which we also propose improvements. This involves the modelling and prediction of quantisation tables to initialise the algorithm, a strategy that is also thoroughly tested. Furthermore, the effects of various window functions on the coding results are investigated, and we find that improved quality can indeed be achieved by modifying JPEG in this fashion.