Miracle-dz/UniFAR-FTUs huggingface dataset:
Post-processing of 3D-printed parts using femtosecond and picosecond laser radiation

Additive manufacturing, also known as 3D-printing, is a near-net shape manufacturing approach, delivering part geometry that can be considerably affected by various process conditions, heat-induced distortions, solidified melt droplets, partially fused powders, and surface modifications induced by the manufacturing tool motion and processing strategy. High-repetition rate femtosecond and picosecond laser radiation was utilized to improve surface quality of metal parts manufactured by laser additive techniques. Different laser scanning approaches were utilized to increase the ablation efficiency and to reduce the surface roughness while preserving the initial part geometry. We studied post-processing of 3D-shaped parts made of Nickel- and Titanium-base alloys by utilizing Selective Laser Melting (SLM) and Laser Metal Deposition (LMD) as additive manufacturing techniques. Process parameters such as the pulse energy, the number of layers and their spatial separation were varied. Surface processing in several layers was necessary to remove the excessive material, such as individual powder particles, and to reduce the average surface roughness from asdeposited 22-45 μm to a few microns. Due to the ultrafast laser-processing regime and the small heat-affected zone induced in materials, this novel integrated manufacturing approach can be used to post-process parts made of thermally and mechanically sensitive materials, and to attain complex designed shapes with micrometer precision.
PATTERN FORMATION AND NON-LINEAR PHENOMENA IN STRETCHED DISCOTIC LIQUID CRYSTAL FIBRES

This paper presents a non-linear numerical and bifurcation analysis of pattern formation phenomena in a discotic nematic liquid crystal confined to annular cylindrical cavities and subjected to extensional deformations. The results are of direct relevance to understanding the industrial melt spinning of mesophase carbon fibres, using discotic nematic liquid crystals precursor materials. Three types of orientation patterns are identified in this study: spatially constant (radial), monotonic (pinwheel), and oscillatory (zigzag). Numerical and closed form analytical results predicting continuous transformations between the radial, pinwheel, zigzag radial orientation modes are presented. The bifurcation analysis provides a direct characterization of the parametric dependence and the transitions between these three basic patterns, and provides a complete understanding of the multistability phenomena that is present in the oscillatory orientation patterns. In general it is found that small fibres of nearly elas.
X-ray absorption tomography of a high-pressure metal-halide lamp with a bent arc due to Lorentz-forces

Due to its practical importance x-ray absorption (XRA) tomography is becoming a widely applied technique for reconstruction of gas temperature distribution in high intensity discharge lamps. Most of the previous papers have dealt with the cylindrically symmetric plasmas that normally occur when lamps are burned vertically. In this work, a XRA tomographic diagnostic is applied for the first time to a high-pressure metal-halide lamp with a bent arc. X-ray lamp-off and lamp-on measurements have been made for two orthogonal directions. The maximum entropy-based algorithm was applied for the reconstruction of local absorption coefficients which are directly related to the local values of mercury density and plasma temperature. For correct reconstruction of the temperature profile at the edges a new numerical strategy based on the adaptive regularization parameter is developed. This strategy allows use of the measured value of the wall temperature as a reference point to obtain a quantitative temperature distribution.
Rotation of principal components: choice of normalization constraints

Following a principal component analysis, it is fairly common practice to rotate some of the components, often using orthogonal rotation. It is a frequent misconception that orthogonal rotation will produce rotated components which are pairwise uncorrelated, and/or whose loadings are orthogonal In fact, it is not possible, using the standard definition of rotation, to preserve both these properties. Which of the two properties is preserved depends on the normalization chosen for the loadings, prior to rotation. The usual ‘default’ normalization leads to rotated components which possess neither property.
Inelastic resonant tunneling in C 60 molecular junctions

We present an ab initio theory of inelastic electron tunneling spectroscopy along with the theoretical analysis of recent experiments on inelastic transport in molecular tunneling junctions involving ${\mathrm{C}}_{60}$ molecule. We present a self-consistent procedure for calculating electron charge density and tunneling current in the presence of the electron-phonon interaction. We find that electron tunneling is significantly influenced by several specific vibrational modes. Inelastic scattering suppresses resonance transmission peak and substantially redshifts the peak position. We investigate the microscopic origin of this behavior by calculating the relevant vibrational modes and resonance wave functions under nonequilibrium transport conditions.
Enthalpy stabilized superconducting magnets

An essential requirement for complete stabilization of a superconducting magnet is adequate circulation of liquid helium in the winding, resulting in a low average current density, in partially stabilized magnets, the size of the cooling channels is reduced, but access for liquid helium is still considered necessary. With enthalpy stabilization, however, the need for helium penetration into the winding is eliminated, resulting in better packing of the conductors and a higher average current density. A small enthalpy stabilized magnet has been tested that was fully impregnated with epoxy resin and operated at a current density above 104A/cm2. The basis of the design of such magnets is discussed, with particular reference to the choice of conductor size and its effect on average current density in the magnet. Possible applications of this technique are also discussed.
Silicon photonics WDM interconnects based on resonant ring modulators and semiconductor mode locked laser

We demonstrate wavelength domain multiplexed (WDM) data transmission with a data rate of 14 Gbps based on optical carrier generation with a single-section semiconductor mode-locked laser (SS-MLL) and modulation with a Silicon Photonics (SiP) resonant ring modulator (RRM). 18 channels are sequentially measured, whereas the best recorded eye diagrams feature signal quality factors (Q-factors) above 7. While optical re-amplification was necessary to maintain the link budgets and therefore system measurements were performed with an erbium doped fiber amplifier (EDFA), preliminary characterization done with a semiconductor optical amplifier (SOA) indicates compatibility with the latter pending the integration of an additional optical filter to select a subset of carriers and prevent SOA saturation. A systematic analysis of the relative intensity noise (RIN) of isolated comb lines and of signal Q-factors indicates that the link is primarily limited by amplified spontaneous emission (ASE) from the EDFA rather than laser RIN. Measured RIN for single comb components is below -120 dBc/Hz in the range from 7 MHz to 4 GHz and drops to the shot noise level at higher frequencies.
Robustness and performance of a modified adaptive backstepping controller

Recently, a new class of adaptive control schemes based on non-linear design techniques, have been proposed for minimum phase linear time invariant plants. Under certain assumptions on the plant transfer function, these schemes guarantee uniform signal boundedness and good transient and steady-state response for the regulation or tracking error. In this paper we propose a modification that improves the robustness of these schemes with respect to a class of multiplicative uncertainties and input, output disturbances, without loss of performance. This lack of a trade-off between performance and robustness is a result of restricting the multiplicative unmodelled dynamics to be small in both the low- and high-frequency range. It is also shown that parameter convergence and performance improvement is achieved with a dominantly rich reference input.
The Use of Evolution Optimality Principles in Simulation of Structured Biosystems

Abstract Approaches to use the theory of evolutionary optimality in the study of structured models of biological communities are proposed. Relations of this theory to the stability of equilibrium states are indicated and the formulation of its main result for the case of a quasilinear dynamical systems in normed spaces is presented. For models of communities with age, spatial, and age-spatial structure, functionals optimized over parameters of evolutionary selection are constructed. The functionals are calculated on the basis of the available information concerning steady stationary distributions. The sets of parameters obtained as the result of this optimization can serve for identification of models.
New Approach to the Einstein and Maxwell‐Einstein Field Equations

The components of a ``vierbein'' system are introduced as field variables in place of the metric tensor in a Riemannian space. The Riemann tensor, which is then written in terms of these new variables, is used to reformulate the Einstein and Einstein‐Maxwell equations with or without a cosmological constant. These field equations have as solutions metrics with Riemann tensor of predetermined algebraic properties.
The new eclipsing magnetic binary system E 1114+182.

A comprehensive analysis of E 1114 + 182, the first eclipsing AM Herculis binary system and the shortest-period eclipsing cataclysmic variable known, is presented. The time-resolved X-ray observations which led to the system's recognition as an AM Her system with a roughly 90 minute orbital period are reported. The current optical photometric and polarimetric ephemeris and a description of the system's phase-modulated properties are given. The detailed photometric eclipse profile and the highly variable spectroscopic behavior are addressed. This information is used to determine systemic parameters and derive new information on the line emission regions. The data put severe constraints on current torque models for keeping the binary and white dwarf rotation in phase.
Velocity Distribution and Pressure Drop in the Laminar Inlet of a Pipe with Annular Space

The Navier-Stokes equation is linearized for the steady flow in the laminar inlet of a pipe with annular space. This solution shows the family of velocity profiles defined by the modifled Bessel functions. By applications of this family to the momentum equation and the energy equation, respectively, the inlet length and the pressure drop are presented. Some examples of computation are given for the ratio of the inner and outer radii of annular space, m=1.2∼5. The results of computation prove that the relation between the dimensionless distance from pipe entrance σ=x/(R2-R1) R6 and the pressure drop (p0-p)/(ρu02/2) is almost unaffected by m, and the inlet length σL also unaffected. Practically, σL maybe evaluated to be 0.02.
Evaluation of Macro-micronutrient Intake in Overweight People in Grodno, Belarus

Introduction Obesity is a multi-cause disease characterized by excessive fat accumulation, which leads to health problems and chronic diseases in the future. Based on the concept of energy imbalance, which is the main cause of this disease, weight loss in patients with metabolic obesity can be achieved by reducing the energy value of the diet, which leads to energy deficiency and stimulates fat mobilization from fat depots. The purpose of the work is to assess the intake of macro- and micronutrients in the diets of overweight individuals. Materials and methods A survey was conducted to study actual nutrition based on the method of analyzing the frequency of food consumption. Observer groups, aged >18 years (only young people), sexed, living in Grodno, Belarus. During the survey of the respon-dent, the number of food products actually consumed by him during the previous day was established. The applied method of studying actual nutrition is simple and widely available. Results and Discussions In the group of females with BMI 25-29, the number of cases of increased macronutrient intake in the sample reached 89.4% of cases and micronutrient intake decreased by 94.7% of cases, while in the group of males with BMI 25-29.9, macronutrient intake increased by 84.2% of cases and micronutrients decreased by 86.6% of cases, respectively. Conclusion The energy imbalance, especially the deficiency of micronutrients, which have a major role in the synthesis of enzymes that catalyze chemical reactions as well as their role in balancing some hormones, leads to an imbalance in the metabolism process, causing overweight and obesity. Our study advises that nutrition should be corrected early on by making bread enriched with microalgae.
Bulletin of Electrical Engineering and Informatics

Received Sep 13, 2022 Revised Nov 2, 2022 Accepted Nov 25, 2022 The investigation analysed the correct use of the vaccination scheme in order to achieve efficient immunization for children and adults in the midst of the pandemic; through the use of a web application that will greatly facilitate people in their immunization, since the web application will allow them to create alerts to have reminders at times personalized by the user. Also, the web application will provide a schedule complete personalized immunization according to the personal information of the registered user, on the other hand they will also be able to view the information of the different vaccination centers to achieve a correct immunization. The methodology was Scrum, allows prepared for change and to be able to adapt, as well as allowing proper planning for efficient work. The result obtained from the investigation can be seen in the sur-vey carried out on parents; where satisfactory percentages were obtained since 98% of respondents indicated that the use of a web application for the correct immunization of people is of the utmost importance, in addition to the survey they were shown the prototype of the application and indicated that its use was efficient, educational and easy to use for everyone.
Bulletin of Electrical Engineering and Informatics

Received Jun 17, 2022 Revised Aug 6, 2022 Accepted Sep 8, 2022 In this paper, the proposed single boost converter aims to harness more than one renewable energy (RE) input source and achieve a high voltage gain. The interleaved technique combined with voltage multiplier (VM) cells, reduced inductor current and attained high voltage transfer ratio. The boost converter possesses two unidirectional input ports and a bidirectional input port that is connected to a battery storage. The duty ratios of the power and interleaving switches are used to regulate the output voltage of the proposed converter. Three operation modes are identified, and steady state analyses of the converter are presented and discussed. The converter can store excess energy in the battery during periods of abundance and deliver power to the loads when the RE sources are low or unavailable. In addition, the output voltage is higher than that of the conventional boost converter. The converter delivered 278 V from 12 V and 24 V dual input sources. The converter operation is simulated and verified using MATLAB/Simulink.
Assessing the impacts of the COVID-19 wage supplement scheme: A microsimulation study

Microsimulation models have been particularly useful when dealing with the economic welfare impact of COVID-19, particularly since such models offer a way to obtain timely and policy-relevant information in the absence of detailed household-level survey data. This study uses EUROMOD, a static tax-benefit microsimulation model calibrated for Malta, to evaluate the microeconomic impact of the wage supplement scheme introduced in Malta in response to the COVID-19 pandemic for the year 2020. Results suggest that the wage supplement scheme had a number of positive effects. First, it dampened average income losses, both across the income distribution and within economic sectors irrespective of the extent to which these were impacted. In particular, the results show that the scheme’s impact across the income spectrum was progressive in the sense that it shielded the lowest earners relatively more. Poverty rates are invariably lower under the wage supplement scenario, than under a scenario where the scheme is not enacted, whilst its impacts on income inequality are ambiguous. Importantly, the size of the shock suffered by the worst-hit households declines markedly in the presence of the scheme. Future work can benefit from the availability of household survey data to conduct a more thorough assessment of the impacts this study attempts to measure, and in so doing, serve as a validation tool against which simulation exercises such as this can be compared.
Sampling theorem: the cornerstone of discrete optics

The sampling theorem can be described as a economic way of representing a limited bandwidth function. A sample of points is chosen and an interpolation function of these points is used to represent the function. The great importance of this fact is that paves the way to discrete computation. The sample points act as a sort of “highlight” points of the original function, and computation involving the entire function may be restricted to calculation using only the sample points. Moreover we were able to find some refining of the classical outline of the sampling theorem that improves its precision bringing also some physical insight into the core of the theorem. Of course also these consideration are not restricted to optics, they can be construed as general properties of the signal theory. But we were optically minded at all times and most of the applications are in optics.
Direct numerical simulations of turbulent Ekman layers with increasing static stability: modifications to the bulk structure and second-order statistics

Abstract Direct numerical simulations of stably stratified Ekman layers are conducted to study the effect of increasing static stability on turbulence dynamics and modelling in wall-bounded flows at three moderate Reynolds numbers. The flow field is analysed by examining the mean profiles of wind speed, potential temperature and momentum flux, as well as streamwise velocity and temperature spectra. The maximum stabilizing buoyancy flux that a flow can sustain while remaining fully turbulent is found to depend on the Reynolds number. The flows with the highest Reynolds number display a relatively well-developed inertial range and logarithmic layer, and are found to bear similarities to much higher-Reynolds-number flows like the ones encountered in the atmospheric boundary layer. In particular, the near-wall mean profiles follow the Monin–Obukhov similarity theory. However, several flow features, such as the critical Richardson number and the stress–strain alignment, are found to maintain significant dependence on the Reynolds number. The budgets of turbulence kinetic energy (TKE), vertical velocity variance, momentum and buoyancy fluxes, and temperature variance are analysed. The results indicate that the effect of stability on turbulence is first directly manifested in the vertical velocity variance budget, and results in damping of vertical motions. This then leads to a reduction in the downward transport of horizontal momentum components towards the surface, and consequently to a decrease in the shear production term in the TKE budget: changes in the vertical profile of TKE shear production with increasing Richardson number are significant and have a larger impact on TKE than direct buoyancy destruction. The reduction in vertical velocity variance also results in significant drops in the production terms in the momentum flux, buoyancy flux and temperature variance budgets. Various assumptions and parameters related to low-order turbulence closures are investigated. The results suggest that the vertical velocity variance is a more appropriate parameter than the full TKE on which to base eddy-diffusivity and viscosity models.
MOLECULAR SCREENING OF BASAL STEM ROT RESISTANCE GENES IN OIL PALM

Basal stem rot (BSR) is one of the main oil palm diseases that have led to tremendous losses in oil yields for almost a century. Having markers, especially those that are linked to resistance (R) genes could potentially alleviate this problem by providing the tools to select palms that are tolerant or resistant to the disease. This study aimed to develop oil palm genomic markers that can distinguish oil palm plants with different levels of resistance to BSR. We identified 144 homologous R genes in the oil palm genome based on the conserved domain structure of known R proteins. Six simple sequence repeat markers were identified and used to genotype 40 palms with different levels of resistance to BSR. The observed and effective number of alleles ranged from 2 to 7 and 1.57 to 4.30, respectively. The observed heterozygosity ranged from 0.13 to 0.67, with a mean of 0.46 while the expected heterozygosity ranged from 0.40 to 0.78, with a mean of 0.51. Analysis of genetic distances from the set of markers was able to differentiate susceptible and tolerant palm samples. These results may help in the early selection of durable BSR disease resistant oil palm cultivars.
Cattle microsatellite markers successfully established diversity status of Arunachali yak (only registered yak breed of India)

Yak diversity of the country has remained predominantly unexplored for a long time. Among the 169 registered livestock breeds of India, the sole representation from yak genetic resources is the Arunachali yak. This study for the first time investigated genetic diversity status of Arunachali yak using 26 bovine microsatellite markers. All the markers recommended for cattle except one (ILSTS05) amplified with yak genome. Allelic genotype pattern overlapped between yak and cattle across 25 microsatellite loci and a total of 233 alleles were detected in yak. The number of observed alleles across loci ranged from 3–16 with an average of 9.32±0.70. Observed heterozygosity (0.552±0.04) was less than the expected heterozygosity (0.648±0.035) pointing towards heterozygote deficiency in the population. In addition, positive value of FIS index (0.143±0.043) suggested considerable inbreeding. There was no indication of a recent bottleneck event in this population based on heterozygosity excess tests as well as mode-shift analysis. In summary, bovine microsatellite markers proved to be a valuable tool for characterization of Indian yak population. Arunachali yak represents an interesting gene pool with moderate level of diversity. Inbreeding in population calls for sincere efforts to formulate breeding policy so that this precious germplasm is conserved with substantial genetic diversity.
A Study on an Efficient and Robust Differential Privacy Scheme Using a Tag Field in Medical Environment

[Abstract] Recently, the invasion of privacy in medical information has been issued following the interest in the secondary use of mass medical information. The mass medical information is very useful information that can be used in various fields such as disease research and prevention. However, due to privacy laws such as the Privacy Act and Medical Law, this information, including patients' or health professionals' personal information, is difficult to utilize as a secondary use of mass information. To do these problem, various methods such as k-anonymity, l-diversity and differential-privacy that can be utilized while protecting privacy have been developed and utilized in this field. In this paper, we discuss the differential privacy processing of the various methods that have been studied so far