Miracle-dz/UniFAR-FTUs huggingface dataset:
The mediating impact of airlines’ image in relation of corporate social responsibility and customers’ loyalty: An empirical in Vietnam

Abstract Corporate social responsibility (CSR) towards sustainable development has been identified as a marketing philosophy that businesses in developed countries should pursue in the post-Covid-19 era as these practices deal with urgent global social and environmental challenges. Such efforts contributing to sustainable development will enhance corporate image and reinforce strong bonds with customers. In developing countries like Vietnam, how CSR affects consumer behaviour and the mechanism regulating the relationship between CSR and consumer behavior are the research gaps that have not been widely investigated. This study explores the relationship between CSR and customer loyalty, with the emphasis on the mediating role of corporate image. Focusing on the Vietnamese aviation industry, the author surveyed 514 passengers and analyzed them using structural equation modeling. Our findings show that CSR has a positive impact on corporate image and customer loyalty. In addition, CSR also affects customer loyalty through enhancing corporate image. Research results have provided research implications and management implications for the future.
An MRI-compatible three-axis focused ultrasound system for performing drug delivery studies in small animal models

MRI-guided focused-ultrasound is a non-invasive technique that can enhance the delivery of therapeutic agents. The objective of this work was to develop a focused-ultrasound system for preclinical research in small animals that is capable of sonicating with high spatial precision within a closed-bore MRI. The system features a computer-controlled, non-magnetic, three-axis positioning system that uses piezoelectric actuators and linear optical encoders to position a focused-ultrasound transducer to targeted tissues under MRI guidance. The actuator and encoder signals are transmitted through low-pass-filtered connectors on a grounded RF-penetration panel to prevent artifacts during image acquisition. The transducer is attached to the positioning system by a rigid arm and is submerged within a closed water tank. The arm passes into the tank through flexible bellows to ensure that the system remains sealed. An RF coil acquires high-resolution images in the vicinity of the target tissue. An aperture on the water tank, centered about the RF coil, provides an access point for target sonication. Registration between ultrasound and MRI coordinates involves sonicating a temperature-sensitive phantom and measuring the centroid of the thermal focal zone in 3D with MR thermometry. Linear distances of 5 cm with a positioning resolution of 0.05 mm can be achieved for each axis. The system was operated successfully on MRI scanners from different vendors at both 1.5 and 3.0 T, and simultaneous motion and imaging was possible without any mutual interference or imaging artifacts. This system is used for high-throughput small-animal experiments to study the efficacy of ultrasound-enhanced drug delivery.
PCSF: Privacy-Preserving Content-Based Spam Filter

The purpose of privacy-preserving spam filtering is to inspect email while preserving the privacy of its detection rules and the email content. Although many solutions have emerged, they suffer from the following: 1) privacy provided is insufficient as the email content or detection rules may be exposed to third parties; 2) due to improper use of encryption, exhaustive word search attacks are possible, potentially breaking the confidentiality of encrypted emails; 3) when spam filtering is outsourced, email is given to the outsource, where user privacy may be compromised if privacy protection measures are not properly put in place; 4) confirmation of whether the encrypted email is spam is only determined after the receiver receives the email, which can lead to a situation in which spam is loaded to the memory of the receiver’s terminal for spam filtering. This can be harmful, for example, when an attacker inserts a web browser vulnerability into the body of an email to lure users to a phishing site simply by reading the email; 5) computationally expensive operations are unavoidable to provide required features of privacy-preserving spam filtering. We present Privacy-preserving Content-based Spam Filter (PCSF), which is a spam filter system that does not suffer from the aforementioned issues. Additionally, our system provides pre-validation before the receiver reads the email. We provide an implementation of our system based on the Naive Bayes spam filter and prove its security.
High-Resolution Computed Tomography as an Initial Diagnostic and Localization Tool in Patients with Cerebrospinal Fluid Rhinorrhea: A Meta-Analysis

Background and Objectives: This study was performed to investigate the utility of high-resolution computed tomography (HRCT) for the initial localization of cerebrospinal fluid rhinorrhea. Methods: HRCT data regarding the point of cerebrospinal fluid leakage (as confirmed in the operating room), collected up to December 2022, were extracted from five databases. The risk of bias of the included studies was assessed using the Quality Assessment of Diagnostic Accuracy Studies 2 tool. Results: The search revealed eight relevant studies with a total of 254 patients. The diagnostic odds ratio of the imaging studies was 10.0729 (95% confidence interval [CI]: 2.4486; 41.4376; I2 = 54.1%). The area under the summary receiver operating characteristic curve was 0.8. Sensitivity, specificity, the negative predictive value, and the positive predictive value were 0.7550 (95% CI: 0.6163; 0.8553; I2 = 69.8%), 0.8502 (95% CI: 0.5986; 0.9557, I2 = 49.3%), 0.4106 (95% CI: 0.2418; 0.6035; I2 = 59.0%), and 0.9575 (95% CI: 0.8955; 0.9834; I2 = 27.7%), respectively. Conclusions: HRCT can be used to accurately localize cerebrospinal fluid rhinorrhea because it shows bony defects in high detail. However, it has limited utility for the evaluation of active leakage, and localization is difficult in the presence of coexisting lesions.
Celebrity shareholders and corporate risk: Based on empirical evidence gathered from Chinese companies listed on the New Third Board

ABSTRACT Using the 2014 to 2019 Forbes China Celebrity Lists, this study empirically examined the relationship between celebrity shareholders and corporate risk. The findings suggest that celebrity shareholders increased corporate risk. And the main reason is that the capital structure of the enterprise changes significantly after the celebrity shares in the enterprise. Furthermore, this study finds that celebrity shareholders had a greater impact on corporate risk among firms with no independent directors, a high proportion of management shareholders, a low proportion of institutional investors and those belonging to the Innovation tier. Based on China’s unique cultural and market environment, the findings of this study enrich the literature on the impact of celebrities and corporate risk, revealing the economic consequences of celebrity securitization.
Fungal Secondary Metabolites/Dicationic Pyridinium Iodide Combinations in Combat against Multi-Drug Resistant Microorganisms

The spread of antibiotic-resistant opportunistic microbes is a huge socioeconomic burden and a growing concern for global public health. In the current study, two endophytic fungal strains were isolated from Mangifera Indica roots and identified as Aspergillus niger MT597434.1 and Trichoderma lixii KU324798.1. Secondary metabolites produced by A. niger and T. lixii were extracted and tested for their antimicrobial activity. The highest activity was noticed against Staphylococcus aureus and E. coli treated with A. niger and T. lixii secondary metabolites, respectively. A. niger crude extract was mainly composed of Pentadecanoic acid, 14-methyl-, methyl ester and 9-Octadecenoic acid (Z)-, methyl ester (26.66 and 18.01%, respectively), while T. lixii crude extract’s major components were 2,4-Decadienal, (E,E) and 9-Octadecenoic acid (Z)-, and methyl ester (10.69 and 10.32%, respectively). Moreover, a comparative study between the fungal extracts and dicationic pyridinium iodide showed that the combination of A. niger and T. lixii secondary metabolites with dicationic pyridinium iodide compound showed a synergistic effect against Klebsiella pneumoniae. The combined formulae inhibited the bacterial growth after 4 to 6 h through cell wall breakage and cells deformation, with intracellular components leakage and increased ROS production.
A two-step linear inversion of two-dimensional electrical conductivity

We introduce a novel approach to the inversion of two-dimensional distributions of electrical conductivity illuminated by line sources. The algorithm stems from the newly developed extended Born approximation (see J. Geophys. Res., vol.98, no.B2, p.1759, 1993), which sums in a simple analytical expression an infinitude of terms contained in the Neumann series expansion of the electric field resulting from multiple scattering. Comparisons of numerical performance against a finite-difference code show that the extended Born approximation remains accurate up to conductivity contrasts of 1:1000 with respect to a homogeneous background, even with large-size scatterers and for a wide frequency range. Moreover, the new approximation is nearly as computationally efficient as the first-order Born approximation. Most importantly, we show that the mathematical form of the extended Born approximation allows one to express the nonlinear inversion of electromagnetic fields scattered by a line source as the sequential solution of two Fredholm integral equations. We compare this procedure against a more conventional iterative approach applied to a limited-angle tomography experiment. Our numerical tests show superior CPU time performance of the two-step linear inversion process. >
Fluid-structure interactions for flexible and rigid tandem-wings at low Reynolds numbers

Force, Particle Image Velocimetry, Digital Image Correlation and hot-wire measurements were performed for two flat rectangular wings of semi-aspect-ratio 2 in tandem configurations. The wings were separated by a streamwise distance of 1.5 chord lengths at 30° angle of attack and Reynolds number 100,000. The crosswise wing separation was varied systematically from -1.5 to 1.5 chord lengths. A rigid-leading rigid-trailing (R-R) wing configuration and a flexible-leading rigid-trailing (F-R) wing configuration were considered. Crosswise wing separations for the F-R case between 0.0 to 0.4 chord lengths were shown to increase lift coefficient relative to the R-R case; the main benefit in lift generation was noted for the trailing-wing. For the F-R configuration, spanwise deformation of the leading-flexible wing shifted the impingement point of the trailing-edge shear layer on the trailing-wing thus affecting lift generation. Deformation measurements showed that the presence of the rigid-trailing-wing had a profound influence on the flow-induced vibrations of the leading-flexible-wing, peaking at a crosswise separation of 0.32 chord lengths which also provided the largest unsteady forces. Velocity spectra measurements revealed that cases producing increased unsteady forces possessed distinct inter-wing velocity fluctuations which were coupled with the wing vibrations. The results demonstrate that the time-averaged forces and unsteady fluid-structure interactions are strongly determined by the crosswise wing separation and the spanwise flexibility of the leading-wing in tandem configurations.
An approach based on convolutional autoencoder for detecting damage location in a mechanical system

In the field of structural health monitoring, the adoption of intelligent systems able to automatically detect changes in a structure are evidently attractive. A change in the baseline configuration can be an early predictor of a structural defect that has to be monitored before it reaches critical conditions. When there is no prior knowledge on the system, deep learning models such as autoencoders could effectively detect a change and enhance the capability to determine the damage location. In this paper a deep learning approach is applied to a test rig consisting of a small building model composed by four floors connected by bending springs. Modifications of the system are simulated by changing stiffness of the spring. This algorithm is compared with traditional approach based on modal parameters by carrying out experimental tests to validate the hypothesis.
Role of Ge Switch in Phase Transition: Approach using Atomically Controlled GeTe/Sb2Te3 Superlattice

Germanium–antimony–tellurite (GST) is a very attractive material not only for rewritable optical media but also for realizing solid state devices. Recently, the study of the switching mechanism between the amorphous and crystal states has actively been carried out experimentally and theoretically. Now, the role of the flip-flop transition of a Ge atom in a distorted simple-cubic unit cell is the center of discussion. Turning our viewpoint towards a much wider region beyond a unit cell, we can understand that GeSbTe consists of two units: one is a Sb2Te3 layer and the other is a Ge2Te2 layer. On the based of this simple model, we fabricated the superlattice of GST alloys and estimated their thermal properties by differential scanning calorimetry (DSC). In this paper, we discuss the proof of the Ge switch on the basis of thermo-histories.
Eta Carinae across the 2003.5 Minimum: The Character and Variability of the Ejecta Absorption in the Near-Ultraviolet

We present Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS) high-resolution near-ultraviolet (NUV) spectra of η Car's central source recorded before, during and after the 2003.5 spectroscopic minimum. Our focus is on the narrow absorption lines formed in multiple circumstellar shells, superimposed on the broad P Cygni stellar wind features, and how they respond to the flux variations of η Car across the minimum. Over 30 separate narrow-line velocity components are identified: three around -146 km s-1, many between -323 and -587 km s-1, and a few exceeding -1000 km s-1. In general, excitation decreases with increasing velocity indicating that the primary excitation is by UV stellar photons and that the slower shells are located closer to the central source. Two well-isolated velocity systems at -146 and -513 km s-1 display very different spectral characteristics regarding ionization/excitation and respond differently to η Car's spectroscopic minimum. The -146 km s-1 shell, associated with the (internal) Little Homunculus, is ionized across the broad spectroscopic maximum but relaxes during the few months long minimum. The -146 km s-1 component is joined by adjacent velocity components in lines of singly ionized iron-group elements. Ti II and V II absorptions appear during the minimum, most likely caused by a decrease in Lyman-ionizing flux. The -513 km s-1 component, part of the (outer) Homunculus, does not show significant changes in atomic absorptions, but intermediate-velocity components between -369 and -503 km s-1 vary during the minimum. We present the NUV spectrum and describe its general characteristics, but we focus on identifications of the nebular absorption lines and their variations across the 2003.5 minimum. The complete spectrum between 2380 and 3160 Å with line identifications is available in the electronic edition of this paper.
Conservation of Best-Fit Paradigm at an Element Level

The projection theorem describing finite element analysis shows that the strains/stresses computed by the displacement finite element procedure are a best approximation of the true strains/stresses at a global level. For simple linear elastostatics problems this best-fit paradigm holds at an element level, too. But it has been observed that in a certain class of problems where artificial stiffening takes place due to discretization, the finite element solution deviates from the best-fit solution. In this paper we have generalized the projection theorem at the element level and shown that even for such problems the finite element model continues to perform its computation in the best-fit manner to a modified system, so that now the FEM strain in every element is a best-fit not to the original strain but to a modified strain. The analytical expressions presented here have been substantiated by actual finite element results from the relevant computer codes.
Relative error of state-dependent cloning

We present a criterion for estimation of the quality of state-dependent N→L cloning. We call this criterion the relative error because one compares the errors in copies with contiguous size, which is not independent of the closeness of the states to be copied. First, we prove several useful statements that maintain the interpretation for the proposed measure. The tightest lower bound on the relative error is then derived. We describe the optimal asymmetric state-dependent cloner that minimizes the relative error.
Particle dependence of the gallium vacancy production in irradiated n-type gallium arsenide

The relative introduction rate of the gallium vacancy in n-type GaAs irradiated with /sup 60/Co /spl gamma/ rays, 7 MeV electrons, fusion (14 MeV) and fission (1 MeV) neutrons, protons (0.6 to 200 MeV), deuterons (1 to 10 MeV), /spl alpha/ particles (2.5 to 10 MeV), lithium (5 to 20 MeV) and oxygen ions (10 to 30 MeV) has been determined. Effects of annealing are reported. The measured introduction rates obtained with proton irradiation for energies up to 10 MeV, and for the heavy ions agree reasonably well with Rutherford scattering, NIEL calculations and the TRIM simulation. The results for electron irradiation also agree with the corresponding NIEL calculations.
Orcinol Inhibits Melanogenesis in B16F10 Cells via the Upregulation of the MAPK/ERK Signaling Pathway

Background: Orcinol (3,5-dihydroxytoluene) has been reported to demonstrate inhibitory activity against mushroom tyrosinase. This study aims to investigate the inhibitory effect of orcinol on melanogenesis and its mechanism in B16F10 murine melanoma cells. Methods: The effects of orcinol on melanogenesis were determined spectrophotometrically by the intracellular tyrosinase activity and melanin content. The expression of melanogenesis-related gene and signaling pathways was analyzed by Western blot and/or qRT-PCR analyses. Results: Orcinol reduced intracellular tyrosinase activity and melanin content and attenuated the protein expression and mRNA levels of melanogenesis-related genes, such as tyrosinase, tyrosinase-related protein-1, dopachrome tautomerase, and microphthalmia-associated transcription factor (MITF). Orcinol increased the phosphorylation of extracellular signal-regulated kinase (ERK), which decreased MITF expression levels. Conclusion: Orcinol reduces melanogenesis by inhibiting MITF expression, then the ERK signaling pathway, and that orcinol has the potential to become a functional cosmetic compound for skin whitening.
Hypersurface-homogeneous cosmological models with dynamical equation of state parameter in Lyra geometry

The hypersurface homogeneous cosmological models are investigated in the presence of an anisotropic fluid in the framework of Lyra geometry. Exact solutions of field equations are obtained by applying a special law of variation for mean Hubble parameter that gives a negative constant value of the deceleration parameter. These solutions correspond to anisotropic accelerated expanding cosmological models that isotropize for late time even in the presence of anisotropic fluid. The anisotropy of the fluid also isotropizes at late time. Some physical and kinematical properties of the model are also discussed.
An upgradable testing platform designed to characterize and test optical components of FMCW LiDARs, particularly optical phased arrays

CEA aims at developing a compact 1550 nm Frequency Modulated Continuous Wave (FMCW) LiDAR on chip. In this paper, individual demonstrators, corresponding to three main components of a LiDAR (Light Distance And Ranging) system, are combined in a test bench: a FMCW laser source, an emission and reception Optical Phased Array (OPA) and an optical heterodyne detection module. Each component has been individually tested, but also evaluated in order to derive the system performance of a complete LiDAR. A test platform has been developed to calibrate an OPA fabricated at CEA platform, either in emission or in reception mode. The tested OPA includes 256 channels based on grating antennae, with 1.5 μm pitch and 256 thermo-optic phase shifters. More recently, this platform has been completed with a FMCW interferometer, where the FMCW LiDAR detection can be evaluated through a mixed propagation setup, composed of optical fibers and free space. Then, the OPA may be inserted into this setup. Therefore, the optical fiber FMCW interferometer has been optimized to detect the lowest signal (typically less than one hundred fW) and to estimate the signal-to-noise ratio (up to almost 30 dB) with low noise photodiodes. Performance has been compared to theoretical predictions. Then, our custom OPA is included inside this experimental setup in a free space propagation environment. The performance measurements extracted from the spectral analysis are in agreement with the expectations.
Millimeter-wave design of wide-band aperture-coupled stacked microstrip antennas

K-band aperture-coupled stacked microstrip antennas are studied and numerical results based on the solution of integral equations solved in the spectral domain are presented. The effects of varying physical parameters of the structure are investigated with the goal of designing millimeter-wave wideband microstrip antennas. Antennas with different characteristics are then analyzed and compared with experimental data. Bandwidths in excess of 20% are obtained and applications to phased array antennas are discussed. >