Miracle-dz/UniFAR-FTUs huggingface dataset:
High Q-factor multiple Fano resonances for high-sensitivity sensing in all-dielectric metamaterials

We design and numerically investigate the high Q-factor, high modulation depth, and multiple Fano resonances based on a periodical all-dielectric asymmetric nanorod dimer in the near-infrared regime. It is demonstrated that, due to the excitation of the subradiant hybrid modes, five sharp Fano resonances can be achieved by breaking the symmetry of the dimer and can be flexibly tuned by varying the geometrical parameters. All five Fano resonances have a narrow line width, the maximal Q-factor exceeds 9700, and even the minimal Q-factor also reaches about 1090 in magnitude. Particularly, the modulation depth can reach nearly 100%. In addition, the maximal figure of merit reaches 5045. Considering the narrow line-width and significant near-field enhancement, five Fano resonances with large modulation depths in the proposed array are useful for lasing, nonlinear optics, and multiwavelength biosensing.
Analysis of the geometric deviation influence on the aerodynamic characteristics of the fan blades

In this article there are the results of the aerodynamic characteristic calculations for the fan blades of the gas turbine engine for the regional aircraft, considering production deviations. The analyzed models of blades with different geometric airfoil deviations, the calculated model of the fan stage, the estimated aerodynamic characteristics are described. Here you can find the example of the calculation results.
The 6.7 keV Line Emission from the Stellar Flare of Algol

We present spectral analysis of Algol stellar flare data. The 2-day observation of Algol in our Galaxy was done by Suzaku Satellite. Algol binary system consists of two component stars that eclipse one another periodically. The stellar magnetic field activities and Roche Lobe overflow/mass transfer mechanisms during rapid rotation of the component stars generate an X-ray emission. The variation in brightness of the stellar flare from epoch to epoch provides useful information of stellar properties of the component stars. The atomic physics of the Kα line emission process in the vicinities of chromospherically active and X-ray flare stars, and binaries is well understood. The photo ionization/collisional excitation in the Algol’s corona produces 6.7 keV line emission. The accumulated spectra in X-ray Imaging Spectrometer (XIS) sensors fitted combined with bremsstrahlung model and Gaussian line show a strong fixed X-ray energy of 6.7 keV.
Constraints on Microscopic and Phenomenological Equations of State of Dense Matter from GW170817

We discuss the constraints on the equation of state (EOS) of neutron star matter obtained by the data analysis of the neutron star-neutron star merger in the event GW170807. To this scope, we consider two recent microscopic EOS models computed starting from two-body and three-body nuclear interactions derived using chiral perturbation theory. For comparison, we also use three representative phenomenological EOS models derived within the relativistic mean field approach. For each model, we determine the β -stable EOS and then the corresponding neutron star structure by solving the equations of hydrostatic equilibrium in general relativity. In addition, we calculate the tidal deformability parameters for the two neutron stars and discuss the results of our calculations in connection with the constraints obtained from the gravitational wave signal in GW170817. We find that the tidal deformabilities and radii for the binary’s component neutron stars in GW170817, calculated using a recent microscopic EOS model proposed by the present authors, are in very good agreement with those derived by gravitational waves data.
The group inverse and core inverse of sums of two elements in a ring

Abstract In Dedekind-finite ring, we present the group inverse of sum of two group invertible elements under different conditions. Then, the core inverse of a sum of two core invertible elements is investigated. Furthermore, the core inverse of the difference of two core invertible elements is presented. These results generalized the corresponding results of complex matrices.
An Analytic Expression for the Inverse Involute

This article introduces new types of rational approximations of the inverse involute function, widely used in gear engineering, allowing the processing of this function with a very low error. This approximated function is appropriate for engineering applications, with a much reduced number of operations than previous formulae in the existing literature, and a very efficient computation. The proposed expressions avoid the use of iterative methods. The theoretical foundations of the approximation theory of rational functions, the Chebyshev and Jacobi polynomials that allow these approximations to be obtained, are presented in this work, and an adaptation of the Remez algorithm is also provided, which gets a null error at the origin. This way, approximations in ranges or degrees different from those presented here can be obtained. A rational approximation of the direct involute function is computed, which avoids the computation of the tangent function. Finally, the direct polar equation of the circle involute curve is approximated with some application examples.
Applicability of Dmax Method on Heart Rate Variability to Estimate the Lactate Thresholds in Male Runners

Introduction The purpose of this study was to evaluate the application of the Dmax method on heart rate variability (HRV) to estimate the lactate thresholds (LT), during a maximal incremental running test (MIRT). Methods Nineteen male runners performed two MIRTs, with the initial speed at 8 km·h−1 and increments of 1 km·h−1 every 3 minutes, until exhaustion. Measures of HRV and blood lactate concentrations were obtained, and lactate (LT1 and LT2) and HRV (HRVTDMAX1 and HRVTDMAX2) thresholds were identified. ANOVA with Scheffe's post hoc test, effect sizes (d), the bias ± 95% limits of agreement (LoA), standard error of the estimate (SEE), Pearson's (r), and intraclass correlation coefficient (ICC) were calculated to assess validity. Results No significant differences were observed between HRVTDMAX1 and LT1 when expressed for speed (12.1 ± 1.4 km·h−1 and 11.2 ± 2.1 km·h−1; p=0.55; d = 0.45; r = 0.46; bias ± LoA = 0.8 ± 3.7 km·h−1; SEE = 1.2 km·h−1 (95% CI, 0.9–1.9)). Significant differences were observed between HRVTDMAX2 and LT2 when expressed for speed (12.0 ± 1.2 km·h−1 and 14.1 ± 2.5 km·h−1; p=0.00; d = 1.21; r = 0.48; bias ± LoA = −1.0 ± 1.8 km·h−1; SEE = 1.1 km·h−1 (95% CI, 0.8–1.6)), respectively. Reproducibility values were found for the LT1 (ICC = 0.90; bias ± LoA = −0.7 ± 2.0 km·h−1), LT2 (ICC = 0.97; bias ± LoA = −0.1 ± 1.1 km·h−1), HRVTDMAX1 (ICC = 0.48; bias ± LoA = −0.2 ± 3.4 km·h−1), and HRVTDMAX2 (ICC = 0.30; bias ± LoA = 0.3 ± 3.5 km·h−1). Conclusions The Dmax method applied over a HRV dataset allowed the identification of LT1 that is close to aerobic threshold, during a MIRT.
Shock compression/release of magnesium single crystals along a low-symmetry orientation: Role of basal slip

To gain insights into the relative contributions of different plastic deformation mechanisms, particularly basal slip, for shocked hexagonal close-packed (hcp) metals, magnesium (Mg) single crystals were subjected to shock compression and release along a low-symmetry (LS) orientation to 1.9 and 4.8 GPa elastic impact stresses. LS-axis is a “nonspecific” direction resulting in propagation of quasilongitudinal and quasishear waves. Wave profiles, measured using laser interferometry, show a small elastic wave followed by two plastic waves in compression; release wave profiles exhibited a structured response for the higher stress and a smooth response for the lower stress. The LS-axis wave profiles are significantly different than profiles published previously for c- and a-axes, demonstrating that Mg single crystals exhibit strong anisotropy under shock compression/release. Numerical simulations, using a time-dependent anisotropic modeling framework, show that shock wave loading along the LS-axis involves the simultaneous operation of multiple deformation mechanisms. Shock compression along LS-axis is dominated by basal slip while prismatic slip and pyramidal I { 10 1 ¯ 1 } ⟨ 11 2 ¯ 3 ⟩ slip play a smaller role; coupling between longitudinal and shear deformations was observed. The unloading response is dominated by basal slip with some contribution from prismatic slip; pyramidal I slip is not activated. The present results, unlike results obtained for c- and a-axes, show that the deformation mechanism observed under quasistatic loading conditions along LS-axis is not sufficient to determine the shock response along this orientation. Although requiring numerical simulations for wave analysis, shock propagation along a LS-orientation provides new insights into the plastic deformation response of hcp metal single crystals.To gain insights into the relative contributions of different plastic deformation mechanisms, particularly basal slip, for shocked hexagonal close-packed (hcp) metals, magnesium (Mg) single crystals were subjected to shock compression and release along a low-symmetry (LS) orientation to 1.9 and 4.8 GPa elastic impact stresses. LS-axis is a “nonspecific” direction resulting in propagation of quasilongitudinal and quasishear waves. Wave profiles, measured using laser interferometry, show a small elastic wave followed by two plastic waves in compression; release wave profiles exhibited a structured response for the higher stress and a smooth response for the lower stress. The LS-axis wave profiles are significantly different than profiles published previously for c- and a-axes, demonstrating that Mg single crystals exhibit strong anisotropy under shock compression/release. Numerical simulations, using a time-dependent anisotropic modeling framework, show that shock wave loading along the LS-axis involves the.
More connected, more active: galaxy clusters and groups at z ∼ 1 and the connection between their quiescent galaxy fractions and large-scale environments

High-redshift galaxy clusters, unlike local counterparts, show diverse star formation activities. However, it is still unclear what keeps some of the high-redshift clusters active in star formation. To address this issue, we performed a multiobject spectroscopic observation of 226 high-redshift (0.8 < z < 1.3) galaxies in galaxy cluster candidates and the areas surrounding them. Our spectroscopic observation reveals six to eight clusters/groups at z ∼ 0.9 and z ∼ 1.3. The redshift measurements demonstrate the reliability of our photometric redshift measurements, which in turn gives credibility for using photometric redshift members for the analysis of large-scale structures (LSSs). Our investigation of the large-scale environment (∼10 Mpc) surrounding each galaxy cluster reveals LSSs – structures up to ∼10 Mpc scale – around many of, but not all, the confirmed overdensities and the cluster candidates. We investigate the correlation between quiescent galaxy fraction of galaxy overdensities and their surrounding LSSs, with a larger sample of ∼20 overdensities including photometrically selected overdensities at 0.6 < z < 0.9. Interestingly, galaxy overdensities embedded within these extended LSSs show a lower fraction of quiescent galaxies ($\sim 20{{\ \rm per\ cent}}$) than isolated ones at similar redshifts (with a quiescent galaxy fraction of $\sim 50 {{\ \rm per\ cent}}$). Furthermore, we find a possible indication that clusters/groups with a high quiescent galaxy fraction are more centrally concentrated. Based on these results, we suggest that LSSs are the main reservoirs of gas and star-forming galaxies to keep galaxy clusters fresh and extended in size at z ∼ 1.
Maximum likelihood estimation technique of grasscutter (Thryonomys swinderianus) production in Osun State, Nigeria

The study estimated quantitatively the technical efficiency of production and its determinants in grasscutter enterprise in Osun State, Nigeria, using a stochastic production frontier function approach. A total of Seventy-two grasscutter farmers across the three agricultural zones were selected using a simple random sampling technique. Data were collected on the socio-economic characteristics and other variables of interest such as prices of production inputs and output, through a well-structured questionnaire. The Maximum Likelihood Cobb-Douglas estimation procedure was used. Careful analysis revealed that labour, concentrates, capital and farm size were identified as the major determinants of the total output of grasscutter enterprise in the study area. The study also showed that membership of cooperative, access to credit, level of education and extension contact significantly influenced efficiency level in the study area. The maximum technical efficiency attained by the farmers was 93% while the minimum technical efficiency was found to be 45%. The mean technical efficiency (MTE) was 86%. The sum of output elasticities which denotes returns to scale was established at 1.04 signifying increased returns to scale. In essence, the enterprise did not attain maximum production frontier. Based on these findings, it is recommended that efficiency could be increased through better use of available resources, access to credit facilities and assisting and encouraging the farmers in joining cooperative societies so as to have access to loans. Also, educational programmes should be organized to sensitize farmers more on how to improve on their efficiency level.
Past and Projected Weather Pattern Persistence with Associated Multi-Hazards in the British Isles

Hazards such as heatwaves, droughts and floods are often associated with persistent weather patterns. Atmosphere-Ocean General Circulation Models (AOGCMs) are important tools for evaluating projected changes in extreme weather. Here, we demonstrate that 2-day weather pattern persistence, derived from the Lamb Weather Types (LWTs) objective scheme, is a useful concept for both investigating climate risks from multi-hazard events as well as for assessing AOGCM realism. This study evaluates the ability of a Coupled Model Intercomparison Project Phase 5 (CMIP5) multi-model sub-ensemble of 10 AOGCMs at reproducing seasonal LWTs persistence and frequencies over the British Isles (BI). Changes in persistence are investigated under two Representative Concentration Pathways (RCP8.5 and RCP4.5) up to 2100. The ensemble broadly replicates historical LWTs persistence observed in reanalyses (1971–2000). Future persistence and frequency of summer anticyclonic LWT are found to increase, implying heightened risk of drought and heatwaves. On the other hand, the cyclonic LWT decreases in autumn suggesting reduced likelihood of flooding and severe gales. During winter, AOGCMs point to increased risk of concurrent fluvial flooding-wind hazards by 2100, however, they also tend to over-estimate such risks when compared to reanalyses. In summer, the strength of the nocturnal Urban Heat Island (UHI) of London could intensify, enhancing the likelihood of combined heatwave-poor air quality events. Further research is needed to explore other multi-hazards in relation to changing weather pattern persistence and how best to communicate such threats to vulnerable communities.
Echo Phenomena in Populations of Chemical Oscillators

Echo Phenomena in Populations of Chemical Oscillators Tianran Chen The emergence of collective behavior has been observed in all levels of biological systems, for example, the aggregation of slime mold, swarm motion of insects and the collective motion in schools of fish. Synchronization is one of the most important collective behaviors and can play a pivotal role in maintaining the normal function of a living system, such as pacemaker cells in the heart, circadian rhythms, and insulin release from pancreatic cells. Synchronization typically arises as a result of the interaction of large ensembles of oscillators. Studies of the Belousov-Zhabotinsky (BZ) chemical oscillators have shown a variety of collective dynamical behaviors, such as phase clusters, dynamical quorum sensing and chimera states. The discovery of echo phenomena in large populations of coupled Kuramoto oscillators motivates us to study this dynamical behavior using photosensitive BZ oscillators. In this thesis, we examine echo behavior experimentally and mathematically. The experiments are carried out with a BZ micro-oscillator system. A large system of micro-oscillators is achieved by the design of a large oscillator array (LOA), which permits coupling of over 1000 oscillators. The dimensionless Zhabotinsky, Buchholtz, Kiyatkin and Epstein (ZBKE) mathematical model is used to investigate the behavior. The experiment and numerical results illustrate that if a BZ system of oscillators is subject to two perturbations, separated by time τ , then at the time τ after second perturbation, the oscillators show a measurable response in their collective signal. Factors such as noise and size of the perturbation impacting the magnitude of the echo are examined and a theoretical calculation of the magnitude of the echo as a function of the size of the perturbation exhibits good agreement with simulation results using the ZBKE model.
Dynamics of Electromagnetic Fields and Structure of Regular Rotating Electrically Charged Black Holes and Solitons in Nonlinear Electrodynamics Minimally Coupled to Gravity

We study the dynamics of electromagnetic fields of regular rotating electrically charged black holes and solitons replacing naked singularities in nonlinear electrodynamics minimally coupled to gravity (NED-GR). They are related by electromagnetic and gravitational interactions and described by the axially symmetric NED-GR solutions asymptotically Kerr-Newman for a distant observer. Geometry is described by the metrics of the Kerr-Schild class specified by T t t = T r r ( p r = − ρ ) in the co-rotating frame. All regular axially symmetric solutions obtained from spherical solutions with the Newman-Janis algorithm belong to this class. The basic generic feature of all regular objects of this class, both electrically charged and electrically neutral, is the existence of two kinds of de Sitter vacuum interiors. We analyze the regular solutions to dynamical equations for electromagnetic fields and show which kind of a regular interior is favored by electromagnetic dynamics for NED-GR objects.
EVALUASI PENERAPAN JOB SAFETY ANALYSIS (JSA) DI BAGIAN PRODUKSI UNIT PAPER MILL 7/8 PT. PURA BARUTAMA

JSA (Job Safety Analysis) merupakan proses identifikasi bahaya dan risiko yang didasarkanÂ pada tiapÂ­tiap tahap proses pekerjaan. Instrumen dalam JSA meliputi empat macam yaituÂ aktivitas kerja, potensi bahaya, risiko bahaya, dan pengendalian risiko. Di PT Pura BarutamaÂ Unit Paper Mill 7/8 setelah diterapkan JSA, kasus kecelakaan kerja mengalami penurunan yangÂ semula berjumlah 17 kasus selama tahun 2015 menjadi 11 kasus di tahun 2016. Tujuan penelitian ini adalah mengevaluasi penerapan Job Safety Analysis (JSA) di bagian produksi unitÂ Paper Mill 7/8 PT. Pura Barutama. Jenis penelitian ini adalah kualitatif dengan pendekatan studiÂ kasus. Penelitian ini dilakukan pada bulan Juni 2017 di PT. Pura Barutama. Informan dalamÂ penelitian ini sebanyak 7 orang, teknik pengumpulan data dengan melakukan pengamatan danÂ wawancara mendalam. Simpulan dari penelitian ini adalah evaluasi proses aktivitas kerja yangÂ berlangsung di PT. Pura Barutama Unit Paper Mill 7/8 dilaksanakan sesuai prosedur, risikoÂ bahaya dan sumber bahaya ditemukan saat melakukan inspeksi yang dilaksanakan setiap enamÂ bulan sekali, risiko kemungkinan dan keparahan bahaya yang terjadi mencakup semua kategori, upayaÂ­upaya pengendalian risiko bahaya yang sudah diterapkkan oleh PT. Pura BarutamaÂ dilaksanakan dengan cukup baik. Kata Kunci:Â Penerapan Job Safety Analysis (JSA)
Systematic measurements of prompt fission γ rays – and what they tell us about fission fragment de-excitation

In a recent measurement of prompt γ rays from the spontaneous fission of 252Cf an experimental setup was chosen that allowed the study of angular correlations between γ rays and the nuclei from which they were emitted. The observed angular distribution of prompt fission γ rays was then analyzed to estimate the relative contributions from radiation of different multipolarity. Preliminary results are presented and compared to previous angular correlationmeasurements from different fission processes and recent results from calculations with the Monte Carlo Hauser-Feshbach code FIFRELIN.
Adaptive procedure for Fourier estimators: application to deconvolution and decompounding

: The purpose of this paper is twofold. First, introduce a new adaptive procedure to select the optimal – up to a logarithmic factor – cutoﬀ parameter for Fourier density estimators. Two inverse problems are considered: deconvolution and decompounding. Deconvolution is a typical inverse problem, for which our procedure is numerically simple and stable, a comparison is performed with penalized techniques. Moreover, the procedure and the proof of oracle bounds do not rely on any knowledge on the noise term. Second, for decompounding, i.e. non-parametric estimation of the jump density of a compound Poisson process from the observation of n increments at timestep Δ, build an uniﬁed adaptive estimator which is optimal – up to a logarithmic factor – regardless the behavior of Δ. MSC 2010 subject classiﬁcations: 62C12, 62C20; secondary 62G07.
Relative ranks of some partial transformation semigroups

Let Pn , Tn , In , and Sn be the partial transformation semigroup, the (full) transformation semigroup, the symmetric inverse semigroup, and the symmetric group on Xn = {1, . , n} , respectively. For 1 ≤ r ≤ n− 1 , let PKn,r be the subsemigroup consisting α ∈ Pn such that |imα| ≤ r and let SPKn,r = PKn,r \ Tn . In this paper, we first examine the subsemigroup In,r = In ∪ PKn,r and we find the necessary and sufficient conditions for any nonempty subset of PKn,r to be a (minimal) relative generating set of the subsemigroup In,r modulo In . Then we examine the subsemigroups PIn,r = SIn ∪ PKn,r and SIn,r = SIn ∪ SPKn,r for 1 ≤ r ≤ n− 1 where SIn = In \ Sn and compute their relative rank.
The Effect Motivation and Job Satisfaction on Organizational Citizenship Behavior (OCB)

This research is intended to study the influence of; motivation on organizational citizenship; job satisfaction on organizational citizenship behavior; and motivation and job satisfaction (simultaneously) on organizational citizenship behavior of the employees. The method used in this research is associative research aiming to identify the causal relationship between the independent and dependent variable. Data collection techniques used in this research are field study using questionnaire and literature study. The population in this research consists of 58 employees, and the sample was determined using a saturated sample technique. The result of this research shows that motivation has a significant effect on organizational citizenship behavior with a significance value of 0.000 < 0.05. Job satisfaction significantly affects organizational citizenship behavior with a significance value of 0.000 < 0.05. Motivation and job satisfaction simultaneously have a significant effect on organizational citizenship behavior with a significance value of 0.000 < 0.05. The extent of the influence of motivation and job satisfaction on organizational citizenship behavior is 45.8%. It indicates that the rest (44.2%) is influenced by other variables not examined in this research