Miracle-dz/UniFAR-FTUs huggingface dataset:
Laboratory Rotational Spectra of Silyl Isocyanide

The rotational spectrum of silyl isocyanide (SiH3NC), an isomer of the well-studied silyl cyanide (SiH3CN), has been detected in the laboratory in a supersonic molecular beam, and the identification was confirmed by observations of the corresponding rotational transitions in the rare isotopic species and SiH3N13C. Spectroscopic constants derived from 19 transitions between 11 and 35 GHz in the three lowest harmonically related rotational transitions in the K = 0 and 1 ladders of the normal isotopic species including the nitrogen nuclear quadrupole hyperfine constant allow the principal astronomical transitions of SiH3NC to be calculated to an uncertainty of about 4 km s−1 in equivalent radial velocity, or within the FWHM of narrow spectral features in the inner region of IRC+10216 near 200 GHz. The concentration of SiH3NC in our molecular beam is three times less than SiH3CN, or about the same as the corresponding ratio of the isomeric pair SiNC and SiCN produced under similar conditions. Silyl isocyanide is an excellent candidate for astronomical detection, because the spectroscopic and chemical properties are very similar to SiH3CN, which was recently identified in the circumstellar envelope of IRC+10216 by Cernicharo et al. and of SiNC and SiCN in the same source.
Central Bank Communication and Social Media: From Silence to Twitter

This paper discusses the evolution of central bank communication, focusing on recent efforts by central banks to engage with a wider audience via social media. We document the social media presence of major central banks and discuss how analyzing Twitter content by and about monetary policy makers can inform about the effectiveness of communication in influencing beliefs. We focus on recent techniques employed in analyzing social media content in order to understand how central bank communication affects expectations and, subsequently, behavior in financial markets.
A class imbalanced wafer defect classification framework based on variational autoencoder generative adversarial network

Wafer defect classification (WDC) can be crucial to the wafer fabrication process. Engineers can quickly respond to improve the technological process, averting further defects through WDC. However, due to the complex fabrication steps, wafer defects are different in various types. This causes a severe data imbalance problem in WDC. To effectively solve the problem, this study introduces a class imbalanced WDC based on Variational Autoencoder Generative Adversarial Network (VAE-GAN). This framework consists of VAE-GAN and wafer defect classifier. Among them, VAE-GAN is responsible for creating new samples to solve the imbalance problem while the classifier is responsible for classifying wafer defect patterns. Specifically, VAE-GAN combines the advantage of a Variational Autoencoder (VAE) and generative adversarial network. VAE networks can produce subtle differences that do not affect the properties of the data when generating new images. At the same time, the proposed discriminator can help us constrain the generated images to be close to real samples and avoid irrational, feature-missing, and ambiguous samples. WM-811 K dataset is utilized to verify the above method. The experimental results validate that the samples generated by VAE-GAN have a significant improvement in the performance of the WDC system.
Dynamical instability of a dark soliton in a quasi-one-dimensional Bose-Einstein condensate perturbed by an optical lattice

The motion of a dark soliton is investigated in a one-dimensional dilute Bose–Einstein condensate confined in a harmonic trap and an optical lattice. The harmonic trap induces a dynamical instability of the soliton, culminating in sound emission. The presence of the perturbing optical lattice enhances the instability, and in addition, dephases the emitted sound waves, thus preventing stabilization of the soliton by sound reabsorption. This instability can be probed experimentally by monitoring the soliton oscillations under various lattice configurations, which can be realized by changing the intensity and angle between the laser beams that form the lattice. For short enough times, such that the emitted sound does not reinteract with the soliton, the power emitted by the soliton is found to be proportional to the square of the local soliton acceleration, which is in turn proportional to the deformation of the soliton profile.
AVALIAÇÃO PÓS-OCUPACIONAL (APO) DE ESPAÇOS LIVRES PÚBLICOS: UM ESTUDO DE CASO DA PRAÇA FLORIANO PEIXOTO EM IMPERATRIZ /MA

O presente artigo discorre sobre aplicação de uma avaliação pós-ocupação (APO) na Praça Floriano Peixoto em Imperatriz/MA. Tal praça, passou por um processo de reforma e requalificação urbana no ano de 2020 e, deste modo, percebeu-se a necessidade de avaliar tal desempenho do espaço livre público após a sua reforma. Foram realizados mapeamentos e pesquisa de dados referentes à praça e o seu processo de ocupação, bem como a caracterização do seu entorno e os seus usuários. A metodologia utilizada para o desenvolvimento deste artigo partiu inicialmente de uma pesquisa biliográfica acerca dos temas paisagem, espaças livres, praças urbanas e avaliação pós-ocupação, em seguida foram aplicados os métodos quantitativos e qualitativos por meio da APO e levantamento de dados “in loco” para reconhecimento da área de estudo. As análises de campo, mapeamentos, questionário de avaliação do ponto de vista dos usuários a respeito da praça possibilitaram uma refleção acerca do desempenho do espaço público gerando resultados para possíveis reformas e projetos futuros.
Pb0.90Ba0.10Zr0.40Ti0.60O3 Nanostructured Ferroelectric Ceramics Prepared by Spark Plasma Sintering

Nanostructured Pb0.90Ba0. 10Zr0.40Ti0. 60O3 dense ceramics presenting an average grain size of 62 ± 5 nm was prepared by the polymeric precursor method and using the spark plasma sintering technique. The dielectric permittivity curves versus temperature exhibit broad anomaly, indicative of a diffuse phase transition. This result can be explained by the spread of Curie temperatures which are expected to depend on the degree of tetragonality related to the grain size distribution. A pronounced decrease in the maximum of the dielectric permittivity value is attributed to the existence of a large amount of grain boundaries which are non-ferroelectric regions.
Electronic structure of In1-xMnxAs studied by photoemission spectroscopy: Comparison with Ga1-xMnxAs

We have investigated the electronic structure of the p-type diluted magnetic semiconductor ${\mathrm{In}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ by photoemission spectroscopy. The Mn $3d$ partial density of states is found to be basically similar to that of ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}. $ However, the impurity-band-like states near the top of the valence band have not been observed by angle-resolved photoemission spectroscopy unlike ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}. $ This difference would explain the difference in transport, magnetic and optical properties of ${\mathrm{In}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ and ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}. $ The different electronic structures are attributed to the weaker Mn $3d\ensuremath{-}\mathrm{As}4p$ hybridization in ${\mathrm{In}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ than in ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}. $
Parametric quantum spin pump

We investigate a nonadiabatic parametric quantum pump consisting of a nonmagnetic scattering region connected by two ferromagnetic leads. The presence of ferromagnetic leads allows electrons with different spins to experience different potential landscapes. Using this effect we propose a quantum spin pump that drives spin-up electrons to flow in one direction and spin-down electrons to flow in opposite direction. As a result, the spin pump can deliver a spin current with a vanishing charge current.
Isolamento acústico de baixa frequência via metapainel de ressonadores de membrana decorada

CERÂNTOLA, P. C. M. Low frequency acoustic insulation via a decorated membrane resonators metapanel. 2022. 88p. Dissertação (Mestrado) Escola de Engenharia de São Carlos, Universidade de São Paulo, São Carlos, 2022. Structural vibrations are the most common source of noise that people are exposed to on a daily basis. This transmission phenomenon often arises from plate-like oscillating structures, such as the ones massively employed in machines in general and automotive, aeronautical and aerospace applications. The growing need for these segments to be energy-efficient aggravates the noise problem, as lightweight devices tend to be less quiet, especially in the low-frequency range. To tackle this issue, devices known as acoustic metamaterials have been developed and put to use in engineering contexts. Of these, acoustic membrane metamaterials (MAMs) stand out, recognized for their capacity to overcome the mass-law and deliver high levels of sound insulation with low mass and volume added to vibroacoustic systems. The decorated membrane resonator (DMR), a specific MAM concept, achieves this feat from the negative effective mass it presents between its first two normal vibration modes. Several DMR configurations have already been investigated, but the state of the art still has gaps for large-scale applications. In this sense, the present Master’s work aims at designing and evaluating a DMRs metapanel for acoustic attenuation in the range between 178 and 355 Hz with the use of numerical modeling strategies. For this, a design methodology is created based on the finite element model of the panel coupled to a system composed of a cavity and a radiant plate, with the sound power level radiated to the free field being obtained from different formulations for flexible structures. In order to decrease the vibroacoustic coupling, an aperiodic Penrose metapanel is conceived based on the tesselations theory. To verify the robustness of the solution against sources of uncertainty, random variations of constructive aspects were applied to the metapanel. Two different stacking configurations were also simulated. The attenuation capacity of the proposed structure is demonstrated, with the nominal configuration being capable of producing insertion losses of 12, 26 and 25 dB over the three thirds of the octave analyzed, and a maximum of almost 60 dB in the range. The developed methodology proved to be efficient for the design and analysis of a DMRs attenuator.
Biochemical characterization of cotton stalks biochar suggests its role in soil as amendment and decontamination

Cotton is the major fiber crop in Pakistan that accounts for 2% of total national gross domestic product (GDP). After picking of cotton, the dry stalks are major organic waste that has no fate except burning to cook food in villages. Present research focuses use of cotton stalks as feedstock for biochar production, its characterization and effects on soil characteristics. Dry cotton stalks collected from agricultural field of Bahauddin Zakariya University, Multan, Pakistan were combusted under anaerobic conditions at 450oC. The physicochemical analysis of biochar and cotton stalks show higher values of % total carbon, phosphorus and potassium concentrations in biochar as compared to cotton stalks. The concentration of nitrogen was decreased in biochar. Similarly biochar had greater values of fixed carbon that suggest its role for carbon sequestration and as a soil amendment. The fourier transformation infrared spectroscopic spectra (FTIR) of cotton stalks and biochar exposed more acidic groups in biochar as compared to cotton stalks. The newly developed functional groups in biochar have vital role in increasing surface properties, cation exchange capacity, and water holding capacity, and are responsible for heavy metal remediation in contaminated soil. In a further test, results show increase in the water holding capacity and nutrient retention by a sandy soil amended with biochar. It is concluded that cotton stalks can be effectively used to prepare biochar.
The Link between Oxidative Stress, Mitochondrial Dysfunction and Neuroinflammation in the Pathophysiology of Alzheimer’s Disease: Therapeutic Implications and Future Perspectives

Alzheimer’s disease (AD), the most common form of dementia, has increasing incidence, increasing mortality rates, and poses a huge burden on healthcare. None of the currently approved drugs for the treatment of AD influence disease progression. Many clinical trials aiming at inhibiting amyloid plaque formation, increasing amyloid beta clearance, or inhibiting neurofibrillary tangle pathology yielded inconclusive results or failed. Meanwhile, research has identified many interlinked vicious cascades implicating oxidative stress, mitochondrial dysfunction, and chronic neuroinflammation, and has pointed to novel therapeutic targets such as improving mitochondrial bioenergetics and quality control, diminishing oxidative stress, or modulating the neuroinflammatory pathways. Many novel molecules tested in vitro or in animal models have proven efficient, but their translation into clinic needs further research regarding appropriate doses, delivery routes, and possible side effects. Cell-based therapies and extracellular vesicle-mediated delivery of messenger RNAs and microRNAs seem also promising strategies allowing to target specific signaling pathways, but need further research regarding the most appropriate harvesting and culture methods as well as control of the possible tumorigenic side effects. The rapidly developing area of nanotechnology could improve drug delivery and also be used in early diagnosis.
Negativity as a distance from a separable state

The computable measure of the mixed-state entanglement, the negativity, is shown to admit a clear geometrical interpretation, when applied to Schmidt-correlated (SC) states: the negativity of a SC state equals a distance of the state from a pertinent separable state. As a consequence, the Peres-Horodecki criterion of separability is both necessary and sufficient for SC states. Another remarkable consequence is that the negativity of a SC can be estimated 'at a glance' on the density matrix. These results are generalized to mixtures of SC states, which emerge in bipartite evolutions with additive integrals of motion.
Stability, effective dimensions, and effective interactions for bosons in deformed fields

The hyperspherical adiabatic method is used to derive stability criteria for Bose-Einstein condensates in deformed external fields. An analytical approximation is obtained. For constant volume the highest stability is found for spherical traps. Analytical approximations to the stability criterion with and without zero point motion are derived. Extreme geometries of the field effectively confine the system to dimensions lower than three. As a function of deformation we compute the dimension to vary continuously between one and three. We derive a dimension-dependent effective radial Hamiltonian and investigate one choice of an effective interaction in the deformed case.
A homologous recycling model for hot galactic coronae.

An equilibrium model is presented for a hydrostatic isothermal hot gas distribution in a gravitational well of a giant elliptical galaxy immersed in a massive dark halo. The self-consistently determined gravitational potential of the system provides the optical surface brightness distribution of the galaxy, matching the de Vaucouleurs R^1/4-law, if the sound speed in the gas, stellar velocity dispersion, and velocity dispersion of dark matter are related so that optical and X-ray brightness profiles match each other. The thermal equilibrium of the gas is described in the framework of a one-zone model, which incorporates radiative cooling, stellar mass loss, supernova heating, and mass sink due to local condensational instability. The sequence of saddle-node and saddle-connection bifurcations provides a first-order phase transition, which separates the stable hot phase in the cooling medium for a reasonably high efficiency of condensation and precludes catastrophic cooling of the gas. The bifurcations occur naturally, due to the shape of the radiative cooling function, and this holds for a wide range of gas metallicities. The one-zone model implies a scaling relation for the equilibrium stellar and gas densities, which allows a hydrostatic, thermally stable distribution for the hot isothermal coronal gas. The resulting model for gas recycling reproduces the basic optical and X-ray properties of relatively isolated giant elliptical galaxies with hot haloes. Implications for cD galaxies in X-ray dominant clusters and groups are briefly discussed in the general context of galaxy formation and evolution.
Does the neutrino magnetic moment have an impact on solar neutrino physics

Solar neutrino observations coupled with the recent KamLAND data suggest that spin-flavor precession scenario does not play a major role in neutrino propagation in the solar matter. We provide approximate analytical formulas and numerical results to estimate the contribution of the spin-flavor precession, if any, to the electron neutrino survival probability when the magnetic moment and magnetic field combination is small.
Relationship between mandibular position and support planting in 7-year-old children: pilot study

Introduction: Postural stability can be maintained in balance by muscle tone [1]. Change in the mandibular position or posture, may have influence in the postural reflex, defined as an involuntary defense movement [2] to correct deviations and keep the body in balance. If the postural change is constant, the muscles will move the mandible to a more comfortable position, with consequent postural change2 and plantar support. The aim of the study was to compare the plantar support in centralized and in lateralization mandibular position in seven years’ children. Main text: This study was approved by research ethics committee (No. 4.346.542). A pilot study was carried out with seven-year-old children of both sexes. Photogrammetry was performed with spherical markers in the region of the right tragus and chin symphysis (Fig. 1) concomitantly with baropodometry following (Fig. 2, 3) the protocol established by Bittar et al. [4]. Analysis of mandibular displacement and plantar support were performed with centralized mandibular position (maximum intercuspation) and with lateral displacement to the right and left. Statistical analysis compared the differences in mandibular displacement to the right and left sides using Student’s t test. Differences in plantar support variables with centralized mandibular position and in right and left lateralization position were established by the Anova one way test and the Bonferroni pos test. Significant statistical difference was reached by 5 %. Results: Twelve seven-year-old children were included, 20.8 (3.25) Kg and 1.18 (0.06) meters. The sample present greater lateral displacement of the mandible to the lefts compared to right side. Mandibular lateralization was confirmed with statistical difference compared to mandibular position centralized. No difference in all plantar support variables was observed between the three positions: centralized and left and right lateralization. Conclusions: No differences were observed for plantar support compared position in mandibular lateralization and centralized position. Mandibular lateralization displacements did not change plantar support.
Interface superconductivity in the eutectic Sr2RuO4-Ru: 3-K phase of Sr2RuO4

Enhanced superconductivity in the eutectic system ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}\ensuremath{-}\mathrm{Ru}$ is referred to as the 3-K phase of the spin-triplet superconductor ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ because of its enhanced superconducting transition temperature ${T}_{c}$ of $\ensuremath{\sim}3\mathrm{K}. $ We have investigated the field-temperature $(H\ensuremath{-}T)$ phase diagram of the 3-K phase for fields parallel and perpendicular to the ab plane of ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4},$ using out-of-plane resistivity measurements. We have found an upturn curvature in the ${H}_{\mathrm{c}2}(T)$ curve for $H\ensuremath{\Vert}c,$ and a rather gradual temperature dependence of ${H}_{c2}$ close to ${T}_{c}$ for both $H\ensuremath{\Vert}\mathrm{ab}$ and $H\ensuremath{\Vert}c. $ We have also investigated the dependence of ${H}_{c2}$ on the angle between the field and the ab plane at several temperatures. Fitting the Ginzburg-Landau effective-mass model apparently fails to reproduce the angle dependence, particularly near $H\ensuremath{\Vert}c$ and at low temperatures. We propose that all of these characteristic features can be explained, at least in a qualitative fashion, on the basis of a theory by Sigrist and Monien that assumes surface superconductivity with a two-component order parameter occurring at the interface between ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ and Ru inclusions. This provides evidence of the chiral state postulated for the 1.5-K phase by several experiments.
A multiwavelength analysis of a collection of short-duration GRBs observed between 2012 and 2015

We investigate the prompt emission and the afterglow properties of short-duration gamma-ray burst (sGRB) 130603B and another eight sGRB events during 2012–2015, observed by several multiwavelength facilities including the Gran Canarias Telescope 10.4 m telescope. Prompt emission high energy data of the events were obtained by INTEGRAL-SPI-ACS, Swift-BAT, and Fermi-GBM satellites. The prompt emission data by INTEGRAL in the energy range of 0.1–10 MeV for sGRB 130603B, sGRB 140606A, sGRB 140930B, sGRB 141212A, and sGRB 151228A do not show any signature of the extended emission or precursor activity and their spectral and temporal properties are similar to those seen in case of other short bursts. For sGRB 130603B, our new afterglow photometric data constrain the pre-jet-break temporal decay due to denser temporal coverage. For sGRB 130603B, the afterglow light curve, containing both our new and previously published photometric data is broadly consistent with the ISM afterglow model. Modeling of the host galaxies of sGRB 130603B and sGRB 141212A using the LePHARE software supports a scenario in which the environment of the burst is undergoing moderate star formation activity. From the inclusion of our late-time data for eight other sGRBs we are able to: place tight constraints on the non-detection of the afterglow, host galaxy, or any underlying ‘kilonova’ emission. Our late-time afterglow observations of the sGRB 170817A/GW170817 are also discussed and compared with the sub-set of sGRBs.
Surface plasmons in metallic nanoparticles: fundamentals and applications

The excitation of surface plasmons (SPs) in metallic nanoparticles (NPs) induces optical properties hardly achievable in other optical materials, yielding a wide range of applications in many fields. This review presents an overview of SPs in metallic NPs. The concept of SPs in NPs is qualitatively described using a comparison with simple linear oscillators. The mathematical models to carry on calculations on SPs are presented as well as the most common approximations. The different parameters governing the features of SPs and their effect on the optical properties of the materials are reviewed. Finally, applications of SPs in different fields such as biomedicine, energy, environment protection and information technology are revised.