Miracle-dz/UniFAR-FTUs huggingface dataset:
Thick-film resonant piezo-layers as new gravimetric sensors

Resonant piezo-layers (RPLs) manufactured in thick-film technology are proposed as highly sensitive gravimetric sensors. RPLs rely on a PZT-based screen printable paste which is used for the fabrication of planar elements on alumina substrates behaving as thickness-mode resonators. When operated at resonance, these elements are sensitive to a mass load applied on their free moving face, working as resonant microbalances with a frequency output, reaching a mass sensitivity of 114 kHz . This paper describes the paste preparation, background theory, frequency-tracking oscillator and the characterization of the sensors and anticipates their application in sensing arrays for chemical measurements.
The Problem of Monatomic Multicharged Ions and the Nature of the Chemical Bond in Inorganic Crystals

The review deals with the problem of the chemical bond in inorganic solids on the basis of the analysis of the experimental data. It is shown that thermochemical and crystal-chemical arguments can hardly be regarded as proof of the ionic theory, while data derived by modern methods for the direct estimate of effective charges show quite definitely that the bonds are covalent even in structures such as alkaline earth metal oxides and chalcogenides. The bibliography comprises 116 references.
Scattering of scalar waves by rotating black holes

We study the scattering of massless scalar waves by a Kerr black hole by letting plane monochromatic waves impinge on the black hole. We calculate the relevant scattering phase-shifts using the Prüfer phase-function method, which is computationally efficient and also reliable for high frequencies and/or large values of the angular multipole indices (l, m). We use the obtained phase-shifts and the partial-wave approach to determine differential cross sections and deflection functions. Results for off-axis scattering (waves incident along directions misaligned with the black hole's rotation axis) are obtained for the first time. Inspection of the off-axis deflection functions reveals the same scattering phenomena as in Schwarzschild scattering. In particular, the cross sections are dominated by the glory effect and the forward (Coulomb) divergence due to the long-range nature of the gravitational field. In the rotating case the overall diffraction pattern is `frame-dragged' and as a result the glory maximum is not observed in the exact backward direction. We discuss the physical reason for this behaviour, and explain it in terms of the distinction between prograde and retrograde motion in the Kerr gravitational field. Finally, we also discuss the possible influence of the so-called superradiance effect on the scattered waves.
εK′/εK in the chiral limit

The K→ππ system is analyzed in the chiral limit within the Standard Model. We discuss how to connect the short-distance running in the |ΔS| = 1 case to the matrix-elements calculated in a low-energy approximation in a scheme-independent fashion. We calculate this correction and the resulting Wilson Coefficients. The matrix elements are calculated to next-to-leading order in the 1/Nc expansion and combined with the Wilson coefficients to calculate the two isospin amplitudes and eK'. The ΔI = 1/2 rule is reproduced within expected errors and we obtain a substantially larger value for eK'/eK than most other analysises. We discuss the reasons for this difference. We also suggest that the X-boson method is an option for lattice QCD calculations.
Fibre bundles and generalized dimensional reductions

We study some geometrical and topological aspects of the generalized dimensional reduction of supergravities in D = 11 and D = 10 dimensions, which give rise to massive theories in lower dimensions. In these reductions, a global symmetry is used in order to allow some of the fields to have a non-trivial dependence on the compactifying coordinates. Global consistency in the internal space imposes topological restrictions on the parameters of the compactification as well as the structure of the space itself. Examples that we consider include the generalized reduction of the type IIA and IIB theories on a circle, and also the massive ten-dimensional theory obtained by the generalized reduction of D = 11 supergravity.
Indicadores Antropométricos do Estado Nutricional em Idosos: Uma Revisão Sistemática

As alteracoes do estado nutricional estao relacionadas com serios agravos a saude. O presente estudo teve como objetivo determinar, atraves de uma revisao sistematica, os indicadores antropometricos adequados para a avaliacao do estado nutricional de idosos, bem como os pontos de corte utilizados para sua classificacao. Foram pesquisados artigos que avaliaram o estado nutricional de idosos por meio de indicadores antropometricos. Artigos originais e de revisao relacionados com o tema, publicados em ingles, portugues e espanhol, a partir de 1990, selecionados nas bases de dados SciELO, PubMed, Science Direct e BIREME, utilizando como conjunto de interseccao avaliacao nutricional e avaliacao antropometrica. A estrategia de pesquisa descrita resultou em selecao inicial de 180 artigos, sendo incluidos neste trabalho 30 artigos de estudos originais. O numero de individuos em cada estudo variou de 117 a 22.007 idosos, com idade entre 60 a 101 anos, com maior predominância do genero feminino. O indice de massa corporal (IMC) foi o indicador antropometrico mais presente em 30 estudos e a classificacao mais frequente foi Lipschitz em 1994. O indice circunferencia muscular do braco (CMB) foi utilizado em 13 estudos, area muscular do braco (AMB) em 12 estudos e a mini avaliacao nutricional (MAN) foi utilizada em nove estudos. Varios metodos de avaliacao do estado nutricional de idosos tem sido propostos nao havendo consenso entre qual o melhor indicador, uma vez que muitos estudos fazem uso da combinacao de dois ou tres indicadores. Desse modo, sao necessarios novos estudos incluindo uma amostra representativa da populacao idosa brasileira.
Identification and Modelling of Drop‐By‐Drop Irrigation System for Tomato Plants Under Greenhouse Conditions

In northern Tunisia the cultivation of tomatoes in greenhouses is of great importance during the winter and spring seasons. This region has a Mediterranean climate characterized by hot and dry summers and mild and humid winters. The average temperature in winter ranges between 8.1 and 16.1°C. During this season, precipitation ranges between 148 and 376 mm, reaching an average of 366–752 mm over the three seasons (autumn, winter and spring).
Magnetic tunnelling in trilayers with radio-frequency sputtered barrier layers

We have prepared iron and thin films and trilayers by RF magnetron sputtering. The argon pressure during the process is found to have a significant influence on the microstructure and the coercivity of the Fe layers so that we could obtain trilayers with a spin-valve-like magnetic behaviour for thickness as thin as 9 Å. Perpendicular transport measurements of such junctions indicate tunnel behaviour with barrier heights close to 1.5 eV while the barrier width is consistently lower than the nominal thickness. Magnetoresistance of these samples reaches up to 1.1% at room temperature.
Framework to Implement Collaborative Robots in Manual Assembly: A Lean Automation Approach

The recent proliferation of smart manufacturing technologies has emerged the concept of hybrid automation for assembly systems utilizing the best of humans and robots in a combination. Based on the ability to work alongside human-workers the next generation of industrial robots (or robotics 2.0) are referred to as collaborative robots or cobots. This paper presents a systematic framework based on Roozenburg’s engineering design cycle for the deployment of cobots in existing assembly cells for enhanced productivity. A model for defining evaluation-parameters for a cobot are presented. The effectiveness of virtual simulations is discussed for validation and optimization of human-robot work environment.
Evaluación de la capacidad funcional mediante prueba de marcha de 6 minutos en niños con asma

Background: Asthma patients show lower exercise tolerance. Objective: Assessment of functional capacity in children with asthma. Methods: Girls and boys from 6 to 17 years old were included in two groups: asthmatic patients and healthy subjects. PSPQ was applied and vital signs, peak expiratory flow and Modiﬁed Borg Dyspnea Scale were measured at the beginning and the end of 6MWD. Results: Participants included 58 subjects, including 32 asthmatic patients, and 55.2 % male subjects. Mean age: 10.6 years ± 3.1. Asthmatic group: mean distance covered in meters 456.04 ± 54.05, meters covered by gender 456.31 ± 48.73 male and 455.74 ± 61.29 female (p = 0.28). Control group: the mean was 468.28 ± 54.52 meters, meters covered by gender 465.98 ± 58.04 male, 471.44 ± 51.95 female (p = 0.35). The difference between asthmatic group and control group was 12.24 meters in favor of control group (p = 0.378). There was no association between body mass index (BMI) and distance covered (p = 0.53), but a Pearson correlation p = -0.445. In the male gender, CF was positively associated with self-perception in CAF variables: physical condition, physical attractiveness, strength (p = 0.04) and physical self-concept in general (p = 0.02). Conclusions: There was no significant difference in the distance covered between the two groups. The main impact factor was the body mass index with an inverse relation to the distance. Males had better physical self-perception, which is positively associated with CF.
New era of hemostasis (Hemospray: A magic powder)

D of the jejunum is a rare condition with an incidence ranging from 0.1% to 1.5% in upper gastrointestinal studies. These are false diverticula occurring mainly in an older age group. Jejunal diverticula are usually found incidentally at laparotomy or during an upper gastrointestinal study the great majority remains asymptomatic. Acute complications can occur but are rare. This case report describes the case of a 56-year-old symptomatic man who underwent abdominal exploration for suspected intestinal obstruction by abdominal examination and abdominal erect X-ray. Intra-operatively diagnosis of jejunal diverticulosis was made. The preoperative diagnosis of this rare condition is difficult to make. However, with advances in gastro-intestinal imaging and with heightened awareness of this disease, fewer patients will need to undergo operative intervention as most patients are asymptomatic. The authors review the different imaging modalities available to help diagnose this condition and highlight the importance of being aware of this rare disease.
A new single nucleotide polymorphisms typing method and device by bioluminometric assay coupled with a photodiode array

Easy and inexpensive single nucleotide polymorphisms (SNPs) typing systems are required for the practice of genetic testing as well as genetic medicine. Most of the SNPs typing systems use laser-induced fluorescence detection coupled with fluorophore tagging on DNA, which are expensive. A new simple and inexpensive SNPs typing system is presented. It uses a bioluminometric assay coupled with modified primer extension reactions and an inexpensive photodiode array for the luminometric detection. The reagents consumed in the assay are also inexpensive. Although the system is very small, simple and inexpensive, it gives enough sensitivity for detecting target DNAs as small as 10 fmol, which is good enough for SNPs typing.
Nonlinear impact of perturbation theory on numerical relativity

I discuss the impact of gauge-invariant perturbation theory, as developed originally by Vincent Moncrief, on numerical simulations of Einstein's theory. Far from being replaced by numerical relativity, perturbative approaches remain essential for analysing, interpreting, extending and complementing fully nonlinear approaches. In the last decade, as computers have become ever more powerful tools for studying the full nonlinear equations, the power and application of perturbation theory has also grown. Its impact on numerical relativity is profound (decidedly nonlinear), and will surely continue to be for years to come.
Pilot Study of Readiness of Czech Companies to Implement the Principles of Industry 4.0

Received: 10 January 2017 Abstract Accepted: 21 February 2017 This article describes results of the survey, which was conducted in the context of investigating the readiness of selected companies in the Czech Republic to implement the principles of Industry 4.0. The main objective of the survey was to analyze the level of a basic knowledge of this topic in enterprises, the existence of appropriate strategies, responsible persons, and the general awareness among employees.
Robust subsynchronous damping control to stabilise SSR in series‐compensated wind power systems

This study presents a robust subsynchronous damping control (RSDC) to mitigate the subsynchronous resonance (SSR) in a practical wind power system with series capacitor compensations. Firstly, the configuration of the RSDC including the subsynchronous damping calculator and the subharmonic voltage source converter is proposed. Then, the impedance-based network model for the whole system is established and the stability criteria is introduced. Thirdly, to increase the robustness of the proposed controller, its parameters are optimised for the varying operation conditions. Finally, the RTDS-based hardware-in-loop tests with the physically implemented RSDC have fully demonstrated its effectiveness in stabilising SSR under different operation conditions and disturbing scenarios, including the switch-on of series capacitors, ramp-down of wind speed and the variation in the number of online wind turbine generators.
Sensitivity enhancement of a micro-scale biomimetic tactile sensor with epidermal ridges

A microscale biomimetic tactile sensor with epidermal ridges is proposed to enhance the sensitivity of force detection. Guided by the principles of the human tactile perception mechanism, specifically the epidermal ridges, artificial epidermal ridges made of polydimethylsiloxane (PDMS) were designed and placed on micro-fabricated metal strain gauge arrays. A polyimide layer was fabricated to facilitate attachment between the metal and PDMS, so that patterned copper could be deposited on the polyimide to function as the strain gauges. The aspect ratio of the artificial epidermal ridges was optimized using material stability calculations and finite element method (FEM) simulations, and the optimal structure obtained was 400 µm in width and 110 µm in height. Experiments verified the effectiveness of enhancing the sensitivity of such a tactile sensor with the artificial epidermal ridges, in that the outputs of the strain gauges were 1.8 times more sensitive than those of a tactile sensor without ridges. The proposed artificial epidermal ridges are readily applicable to any developed tactile sensors for performance enhancement.
Dynamics of the parametrically driven NLS solitons beyond the onset of the oscillatory instability

Solitary waves in conservative and near-conservative systems may become unstable due to a resonance of two internal oscillation modes. We study the parametrically driven, damped nonlinear Schrödinger equation, a prototype system exhibiting this oscillatory instability. An asymptotic multi-scale expansion is used to derive a reduced amplitude equation describing the nonlinear stage of the instability and supercritical dynamics of the soliton in the weakly dissipative case. We also derive the amplitude equation in the strongly dissipative case, when the bifurcation is of the Hopf type. The analysis of the reduced equations shows that in the undamped case the temporally periodic spatially localized structures are suppressed by the nonlinearity-induced radiation. In this case the unstable stationary soliton evolves either into a slowly decaying long-lived breather, or into a radiating soliton whose amplitude grows without bound. However, adding a small damping is sufficient to bring about a stably oscillating soliton of finite amplitude.
Implementation of Optimal Two-Stage Scheduling of Energy Storage System Based on Big-Data-Driven Forecasting—An Actual Case Study in a Campus Microgrid

Optimal operation scheduling of energy storage systems (ESSs) has been considered as an effective way to cope with uncertainties arising in modern grid operation such as the inherent intermittency of the renewable energy sources (RESs) and load variations. This paper proposes a scheduling algorithm where ESS power inputs are optimally determined to minimize the microgrid (MG) operation cost. The proposed algorithm consists of two stages. In the first stage, hourly schedules during a day are optimized one day in advance with the objective of minimizing the operating cost. In the second stage, the optimal schedule obtained from the first stage is repeatedly updated every 5 min during the day of operation to compensate for the uncertainties in load demand and RES output power. The ESS model is developed considering operating efficiencies and then incorporated in mixed integer linear programming (MILP). Penalty functions are also considered to acquire feasible optimal solutions even under large forecasting errors in RES generation and load variation. The proposed algorithm is verified in a campus MG, implemented using ESSs and photovoltaic (PV) arrays. The field test results are obtained using open-source software and then compared with those acquired using commercial software.
Limits on dark matter annihilation signals from the Fermi LAT 4-year measurement of the isotropic gamma-ray background

We search for evidence of dark matter (DM) annihilation in the isotropic gamma-ray background (IGRB) measured with 50 months of Fermi Large Area Telescope (LAT) observations. An improved theoretical description of the cosmological DM annihilation signal, based on two complementary techniques and assuming generic weakly interacting massive particle (WIMP) properties, renders more precise predictions compared to previous work. More specifically, we estimate the cosmologically-induced gamma-ray intensity to have an uncertainty of a factor ∼ 20 in canonical setups. We consistently include both the Galactic and extragalactic signals under the same theoretical framework, and study the impact of the former on the IGRB spectrum derivation. We find no evidence for a DM signal and we set limits on the DM-induced isotropic gamma-ray signal. Our limits are competitive for DM particle masses up to tens of TeV and, indeed, are the strongest limits derived from Fermi LAT data at TeV energies. This is possible thanks to the new Fermi LAT IGRB measurement, which now extends up to an energy of 820 GeV. We quantify uncertainties in detail and show the potential this type of search offers for testing the WIMP paradigm with a complementary and truly cosmological probe of DM particle signals.
A novel application of ALO-based fractional order fuzzy PID controller for AGC of power system with diverse sources of generation

The operation and control of the modern power system has become complex and difficult due to the incessant penetration of nonconventional energy sources integrated to the power grid and the structural variation of power system with continuing escalation of power demand in recent years. This entails the implementation of intelligent control strategy for satisfactory operation of the power system. Hence, a fractional order fuzzy proportional integral derivative (FOFPID) controller is suggested in this article for automatic generation control of two unequal area interconnected power system with diverse generating units such as thermal, hydro, diesel and wind power plants. The dynamic performance of the system is investigated by using proportional integral derivative (PID), fractional order PID (FOPID), fuzzy PID (FPID) and fractional order fuzzy PID (FOFPID) controllers separately. The parameters of these controllers are optimised by using ant lion optimiser algorithm with integral time absolute error as the objective function. The supremacy of the proposed controller is established by contrasting the results with FPID, FOPID and PID controllers. It is also observed that FPID controller gives superior result than PID and FOPID controllers. Further it is found that the result of FOPID controller is better than the integer order PID controller. Finally robustness analysis is performed to confirm the robustness of the proposed controller against parametric variations and random loading of the system.
Impact of mode coupling effects on few-mode optical fiber communication line performance

In this paper, the signal propagation is described by a generalized nonlinear Schrodinger equation take into account linear and nonlinear mode coupling. A modified solution based on split-step Fourier method is considered. The method for simulation of mode coupling coefficients based on statistical characteristics is proposed. Results of bit error rate estimations for space division multiplexing signal propagation in few mode fiber communication line for weak and strong coupling regime are represented.
Structural and electrical properties of laser-crystallized nanocrystalline Ge films and nanocrystalline Ge/SiNx multilayers

Nanocrystalline Ge (nc-Ge) single layers and nc-Ge/SiNx multilayers are prepared by laser annealing amorphous Ge (a-Ge) films and a-Ge/SiNx multilayers. The microstructures as well as the electrical properties of laser-crystallized samples are systematically studied by using various techniques. It is found that the optical band gap of nc-Ge film is reduced compared with its amorphous counterpart. The formed nc-Ge film is of p-type, and the dark conductivity is enhanced by 6 orders for an nc-Ge single layer and 4 orders for a multilayer. It is suggested that the carrier transport mechanism is dominant by the thermally activation process via the nanocrystal, which is different from the thermally annealed nc-Ge sample at an intermediate temperature. The carrier mobility of nc-Ge film can reach as high as about 39.4 cm2·V−1·s−1, which indicates their potential applications in future nano-devices.
Gauge invariance of Poincare generators in free higher spin gauge theories

The authors show that for any free symmetric tensor field model derived from a geometrical action by expansion about flat space, the unavoidable gauge dependence of its stress tensor is confined to a superpotential and so does not affect the Poincare generators. This conclusion is also established for general free higher spin gauge fields by an alternative non-geometric derivation.
The LISA Pathfinder mission

In this paper, we describe the current status of the LISA Pathfinder mission, a precursor mission aimed at demonstrating key technologies for future space-based gravitational wave detectors, like LISA. Since much of the flight hardware has already been constructed and tested, we will show that performance measurements and analysis of these flight components lead to an expected performance of the LISA Pathfinder which is a significant improvement over the mission requirements, and which actually reaches the LISA requirements over the entire LISA Pathfinder measurement band.
On the existence of complements of the canonical divisor for Mori conic bundles

This paper continues the author's study of extremal contractions in the sense of Mori from three-dimensional varieties onto surfaces. Such contractions occur in a natural way in the birational classification theory of three-dimensional algebraic varieties. Reid's “general elephant” conjecture of the complementedness of the canonical divisor and also the conjecture about singularities of the base surface are discussed. The situation is studied locally near a singular fibre.