Miracle-dz/UniFAR-FTUs huggingface dataset:
Angular momentum and mass formulas for rotating stationary quasiblack holes

We consider the quasiblack hole limit of a stationary body when its boundary approaches its own gravitational radius, i.e., its quasihorizon. It is shown that there exists a perfect correspondence between the different mass contributions and the mass formula for quasiblack and black holes in spite of the difference in derivation and meaning of the formulas in both cases. For extremal quasiblack holes the finite surface stresses give zero contribution to the total mass. Analogous properties are derived for the angular momentum.
Dispersal and Space Use of Captive-Reared and Wild-Rehabilitated Harpy Eagles Released in Central American Landscapes: Implications for Reintroduction and Reinforcement Management

Understanding the spatial context of animal movements is fundamental for the establishment and management of protected areas. We tracked, by telemetry devices, 31 captive-reared and 5 wild-rehabilitated Harpia harpyja and estimated the dispersal and space use after release in Mesoamerica. We evaluated the effectiveness of protected areas in the protection of home ranges and examined how individual traits, release methods and landscape features influenced the dispersal and home range using mixed-effects models. The mean post-release dispersal was 29.4 km (95% CI: 22.5–38.5), and the annual home ranges averaged 1039.5 km2 (95% CI: 627–1941). The home ranges were influenced by the release method, patch richness, patch and edge density and contagion. The currently protected areas in Mesoamerica may not be effective conservation units for this species. The Harpy Eagle average home range greatly exceeded the average size of 1115 terrestrial protected areas (52.7 ± 6.1 km2) in Mesoamerica. Due to their wide use of space, including transboundary space, Harpy Eagle conservation efforts may fail if they are not carefully coordinated between the countries involved. Future restoration efforts of umbrella forest-dwelling raptors should select release sites with highly aggregated and poorly interspersed forests. The release sites should have a buffer of approximately 30 km and should be located completely within protected areas.
The impact of leadership on employee presenteeism: A comparison between police and non-police samples

Leader support is an essential factor influencing worker health and stress. Police officers are part of a class of workers who must deal with a high level of stress. Significant stress can lead to the onset of symptoms of psychological distress, which can lead to presenteeism (employees are present but suffer from mental health symptoms). However, we note that few studies focus on police leadership and job-related-stress presenteeism. Therefore, the current research is relevant and aims to demonstrate the link between the leadership style (Multifactor Leadership Questionnaire) on presenteeism (Job-Stress-Related Presenteeism measure) for police and non-police samples. A total of 252 employees, police officers (municipal organization) and blue-collar workers (public organization) completed the questionnaires. The results indicated that, for both samples, transformational leadership did not significantly influence job-stress presenteeism. Laissez-faire leadership had a strong negative effect on police and non-police employees’ job-related stress presenteeism scores. Finally, a transactional leadership style predicted higher levels of job-related-stress presenteeism for our non-police (blue-collar) sample; it did not significantly influence job-stress-related presenteeism for our police sample. These results highlight the importance of leadership style on employee well-being, and the implications of these results are discussed.
Parasitological monitoring of European bison in the West Pomeranian voivodeship on the basis of coproscopical examination

The aim of the study was to determine the level of parasitic infections in West Pomeranian European bison on the basis of coproscopic examinations. A total of 172 faecal samples of European bison from the Mirosławiec, Drawsko and Jałowcówka herds were examined by the flotation and sedimentation methods as well as the Baermann technique. Faecal examinations revealed the presence of gastrointestinal nematode eggs belonging to the family Trichostrongylidae and the genera Nematodirus, Aonchotheca, Trichuris and Strongyloides, eggs of tapeworms of the genus Moniezia, trematodes Fasciola hepatica and Paramphistomum cervi as well as larvae of the lungworm Dictyocaulus viviparus and seven species of coccidia of the genus Eimeria (E. bovis, E. pellita, E. zuernii, E. auburnensis, E. cylindrica, E. ellipsoidalis, and E. brasiliensis). The composition of parasite species in the population of European bison in the West Pomeranian voivodeship was similar to that observed in other free-living European bison populations in Poland.
Role of N-Cadherin in Epithelial-to-Mesenchymal Transition and Chemosensitivity of Colon Carcinoma Cells

Simple Summary The role of N-cadherin expression in epithelial-to-mesenchymal transition (EMT) and related aggressive tumor colon cancer cell phenotype was investigated using various in vitro and in vivo models. With the help of several standard laboratory techniques, it was verified that an artificially increased N-cadherin expression has only a limited reprogramming potential towards colon cancer cells unlike the case where colon cancer cells present with a naturally elevated presence of N-cadherin. Abstract (1) Background: N-cadherin expression, epithelial-to-mesenchymal transition (EMT) and aggressive biological phenotype of tumor cells are linked although the underlying mechanisms are not entirely clear. (2) Methods: In this study, we used two different in vitro cell models with varying N-cadherin expression (stabilized lines and primocultures) and investigated their select biological features including the degree of their chemoresistance both in vitro as well as in vivo. (3) Results: We report that although enforced N-cadherin expression changes select morphological and behavioral characteristics of exposed cells, it fails to successfully reprogram cells to the aggressive, chemoresistant phenotype both in vitro as well as in vivo as verified by implantation of those cells into athymic mice. Conversely, primocultures of patient-colonic cells with naturally high levels of N-cadherin expression show fully aggressive and chemoresistant phenotype pertinent to EMT (in vitro and in vivo), with a potential to develop new mutations and in the presence of dysregulated regulatory pathways as represented by investigated miRNA profiles. (4) Conclusions: The presented results bring new facts concerning the functional axis of N-cadherin expression and related biological features of colon cancer cells and highlight colon cancer primocultures as a useful model for such studies.
Magnetic fields around late-type stars using water maser observations

We present the analysis of the circular polarization, due to Zeeman splitting, of the water masers around a sample of late-type stars to determine the magnetic fields in their circumstellar envelopes. The magnetic field strengths in the water maser regions around the Mira variable stars U Ori and U Her are shown to be several Gauss while those of the supergiants S Per, NML Cyg and VY CMa are several hundred mG. We also show that large scale magnetic fields permeate the CSE of an evolved star; the polarization of the water masers around VX Sgr reveals a dipole field structure. We shortly discuss the coupling of the magnetic field with the stellar outflow, as such fields could possibly be the cause of distinctly aspherical mass-loss and the resulting aspherical planetary nebulae.
Explorando Justiça em Sistemas de Recomendação

Sistemas de Recomendação são ferramentas utilizadas para sugerir itens, que sejam de interesse dos usuários. Estes sistemas baseiam-se no histórico de preferências do usuário para gerar uma lista com recomendações, que possuam maior similaridade ou relevância com o perfil do usuário. A recomendação baseada em similaridade/relevância pode causar efeitos colaterais na lista como: superespecialização das recomendações em um determinado núcleo de itens, pouca diversidade de categorias e desbalanceamento de gêneros. Assim, esta dissertação tem como objetivo explorar a calibragem, que é um meio para produzir recomendações que sejam relevantes aos usuários e ao mesmo tempo considerar todas as áreas de suas preferências. Para isto, foram propostas formas de realizar o balanceamento entre a relevância a calibragem, assim como um modelo conceitual de sistema calibrado e um protocolo de decisão. Os resultados indicam que a calibragem produz efeitos positivos tanto para a precisão quanto para a justiça.
Design of a Tri-Band Wearable Antenna for Millimeter-Wave 5G Applications

A printed monopole antenna for millimeter-wave applications in the 5G frequency region is described in this research. As a result, the proposed antenna resonates in three frequency bands that are designated for 5G communication systems, including 28 GHz, 38 GHz, and 60 GHz (V band). For the sake of compactness, the coplanar waveguide (CPW) method is used. The overall size of the proposed tri-band antenna is 4 mm × 3 mm × 0.25 mm. Using a watch strap and human tissue, such as skin, the proposed antenna gives steady results. At 28 GHz, 38 GHz, and 60 GHz, the antenna’s gain is found to be 5.29 dB, 7.47 dB, and 9 dB, respectively. The overall simulated radiation efficiency is found to be 85% over the watch strap. Wearable devices are a great fit for the proposed tri-band antenna. The antenna prototype was built and tested in order to verify its performance. It can be observed that the simulated and measured results are in close contact. According to our comparative research, the proposed antenna is a good choice for smart 5G devices because of its small size and simple structure, as well as its high gain and radiation efficiency.
[O iii] equivalent width and orientation effects in quasars

The flux of the [O III] λ5007-A line is considered to be a good indicator of the bolometric emission of quasars. The observed continuum emission from the accretion disc should instead be strongly dependent on the inclination angle θ between the disc axis and the line of sight. Based on this, the equivalent width (EW) of [O III] should provide a direct measure of θ. Here we analyse the distribution of EW([O III]) in a sample of ∼6000 Sloan Digital Sky Survey quasars, and find that it can be accurately reproduced assuming a relatively small intrinsic scatter and a random distribution of inclination angles. This result has several implications: (1) it is a direct proof of the disc-like emission of the optical continuum of quasars; (2) the value of EW([O III]) can be used as a proxy of the inclination, to correct the measured continuum emission and then estimate the bolometric luminosity of quasars and (3) the presence of almost edge-on discs among broad-line quasars implies that the accretion disc is not aligned with the circumnuclear absorber, and/or that the covering fraction of the latter is rather small. Finally, we show that a similar analysis of EW distributions of broad lines (Hβ, Mg II and C IV) provides no evidence of inclination effects, suggesting a disc-like geometry of the broad emission line region.
Dark matter annihilation in the universe

The astronomical dark matter is an essential component of the Universe and yet its nature is still unresolved. It could be made of neutral and massive elementary particles which are their own antimatter partners. These dark matter species undergo mutual annihilations whose effects are briefly reviewed in this article. Dark matter annihilation plays a key role at early times as it sets the relic abundance of the particles once they have decoupled from the primordial plasma. A weak annihilation cross section naturally leads to a cosmological abundance in agreement with observations. Dark matter species subsequently annihilate — or decay — during Big Bang nucleosynthesis and could play havoc with the light element abundances unless they offer a possible solution to the 7Li problem. They could also reionize the intergalactic medium after recombination and leave visible imprints in the cosmic microwave background. But one of the most exciting aspects of the question lies in the possibility to indirectly detect.
Promoting Physical Activity among Workers: A Review of Literature and Future Directions on Developing Theory-Based Interventions

Insufficient physical activity (PA) has been identified as a leading risk factor for premature and all-cause death, as well as non-communicable diseases. Employees, especially those with low occupational PA, are more vulnerable to physical inactivity, and studies in this population are scarce. However, employees may receive benefits for both health and work productivity from PA. Therefore, well-designed behavior change studies to promote PA in employees are urgently needed, especially during the COVID-19 pandemic. Literature was searched before 30 July 2022, and updated evidence was summarized. This review elaborates on the evidence related to insufficient PA and further provides an overview of theory-based interventions for promoting PA. Evidence indicates that intervention mapping (IM) was a useful tool to develop, implement, and evaluate behavior change interventions. Based on the IM framework, reviewing the theory- and evidence-based change methods and delivery modes, and further identifying the research gaps and limitations of existing interventions could provide promising suggestions and directions for development of well-founded interventions promoting PA among employees. The updated knowledge base for developing future interventions may boost efficacy and provide firm conclusions for researchers in this area.
A spatiotemporal grammar network model with wide attention for short-term traffic flow prediction

Short-term traffic flow prediction is of great significance in intelligent transportation. In recent years, with the development of information collection technology and deep learning algorithms, neural network models have become increasingly popular in traffic flow prediction research. However, accurate and fast prediction is a challenge because of the uncertain feature of traffic flow and limitations of the model structure. Motivated by this issue, this paper uses a dual-branch grammar model to extract the deep spatio-temporal features of historical traffic information. Each branch combines the grammar structure with the gated convolution operation to realize the interaction between the implicit features of different traffic parameters. Moreover, scaled exponential linear units (Selu) are used as an activation function for gated convolution operation to enhance the convergence effect of network training. And then, a wide attention module is designed to weigh the extracted deep spatio-temporal features to increase the model's prediction accuracy with a slight increase in computational cost. Finally, actual traffic data from Caltrans Performance Measurement System (PeMS) is used to evaluate the prediction performance with the result that the proposed prediction method outperforms other methods in terms of prediction accuracy. In addition, this paper proves the Selu function's importance by analysing the training error's convergence effect and explains the role of wide attention in the prediction task through visualization and statistical analysis operations.
Limits on quantum gravity effects from Swift short gamma-ray bursts

The delay in the arrival times between high and low energy photons from cosmic sources can be used to test the violation of the Lorentz invariance (LIV), predicted by some quantum gravity theories, and to constrain its characteristic energy scale ${\rm E_{QG}}$ that is of the order of the Planck energy. Gamma-ray bursts (GRBs) and blazars are ideal for this purpose thanks to their broad spectral energy distribution and cosmological distances: at first order approximation, the constraints on ${\rm E_{QG}}$ are proportional to the photon energy separation and the distance of the source. However, the LIV tiny contribution to the total time delay can be dominated by intrinsic delays related to the physics of the sources: long GRBs typically show a delay between high and low energy photons related to their spectral evolution (spectral lag). Short GRBs have null intrinsic spectral lags and are therefore an ideal tool to measure any LIV effect. We considered a sample of $15$ short GRBs with known redshift observed by Swift and we estimate a limit on ${\rm E_{QG}}\gtrsim 1.5\times 10^{16}$ GeV. Our estimate represents an improvement with respect to the limit obtained with a larger (double) sample of long GRBs and is more robust than the estimates on single events because it accounts for the intrinsic delay in a statistical sense.
Marketing Analytics Case Study: Hotel Catalonia Barcelona Plaza

Imagine a scenario where Hotel Catalonia Barcelona Plaza approached a consulting company, seeking to understand its customers and improve its performance. The hotel provided its room booking records from 2015 to 2017 to the consulting company, while the consulting company collected tweets about the hotel, its customer reviews from Booking.com, and the reviews of other hotels in Barcelona. With all the data collected, the consulting company conducted an analysis to help the client hotel understand its customers and performance, and subsequently provided corresponding recommendations based on the findings.
The Identification of the White Dwarf Companion to the Millisecond Pulsar J2317+1439

We report the identification of the optical counterpart to the companion of the millisecond pulsar J2317+1439. At the timing position of the pulsar, we find an object with , , and . The magnitudes and colors of the object are consistent with a white dwarf (WD). Compared with WD cooling models, we estimate that it has a mass of , an effective temperature of K, and a cooling age of 10.9 ± 0.3 Gyr. Combining our results with published constraints on the orbital parameters obtained through pulsar timing, we estimate the pulsar mass to be . Although the constraint on the pulsar mass is still weak, there is a significant possibility that the pulsar could be more massive than two solar masses.
Alignment of the synthesis of quality data (SQD) model, technology self-efficacy and TPACK Core measures in preparing pre-service teachers to integrate technology

Preparing pre-service teachers to integrate technology in their future classrooms is a complex endeavor. Several factors known to affect the use of technology in the classroom include technology knowledge and skills, positive attitudes toward integrating technology, pedagogical expertise with technology and content knowledge in one or more disciplines. One strategy that has been used in many educator preparation programs has been to create a course that teaches how to integrate technology. Measuring the impact of these types of courses is important in determining whether they are meeting the needs of the pre-service teachers in their pursuit to integrate technology in a meaningful and effective way. This paper reports on the measurement and alignment of three aspects that impact pre-service technology integration - technology self-efficacy, strategies and experiences provided by the preparation programs, and the intersection of technology, content knowledge and pedagogy. Pre-service participants in a semester-long course focused on integrating technology gained significantly from pre to post on each of the scales, demonstrating an increase in technology self-efficacy, experiences related to technology during their program and confidence in fusing technology, content knowledge and pedagogy. In addition, the three measures focused on different areas of technology integration aligned to show relationships of the attributes important for using technology in their future classrooms.
Donkey whey protein and peptides regulate gut microbiota community and physiological functions of D‐galactose‐induced aging mice

Abstract The prolongation of life span has attracted more and more attention in the current world. Gut microbiota is considered one of the most critical elements and is essential in regulating life span and quality. The effects of donkey whey protein (DWP) and donkey whey hydrolysate (DWPP) on physiological functions and gut microbiota of D‐galactose‐induced aging mice were investigated to find new strategies for resisting aging. Our results showed that DWP and DWPP could increase the body weight gain velocity, superoxide dismutase (SOD) activity, and thymus index, whereas decrease the level of reactive oxygen species (ROS) and malondialdehyde (MDA), and improve the aging of the body in the liver congestion, oozy draw focal sclerosis of chronic inflammation. The effects of medium and high concentrations of DWP and low and medium concentrations of DWPP were the same as the vitamin C (Vc)‐positive control group. It was found that both DWP and DWPP could change α‐diversity; the relative abundance of Lactobacillus increased, whereas the relative abundance of Helicobacter and Stenotrophomonas decreased after being treated with DWP and DWPP. The correlation between intestinal microflora and physiological indexes showed that chao1, ACE, and observed species indexes in the α index were positively correlated with weight gain velocity, SOD activity, and thymus index. The relative abundance of Lactobacillus was positively correlated with SOD and thymus index but negatively correlated with MDA. The relative abundance of Stenotrophomonas was opposite to that of Lactobacillus. The Anaerobiospirillum, Fusobacterium, and Dubosiella had a significant positive correlation with the weight gain velocity. The study provided a deeper more profound understanding of the potential use of DWP and DWPP in senescence delays.
MUSE sneaks a peek at extreme ram-pressure stripping events – IV. Hydrodynamic and gravitational interactions in the Blue Infalling Group

We report new wide-field (≈4 × 4 arcmin2) Multi Unit Spectroscopic Explorer (MUSE) observations of the Blue Infalling Group (BIG), a compact group of galaxies located at a projected distance of ≃150 kpc from the X-ray centre of the A1367 cluster at z = 0.021. Our MUSE observations map in detail the extended ionized gas, primarily traced by H α emission, in between the members of the group. The gas morphology and its kinematics appear consistent with a tidal origin due to galaxy encounters, as also supported by the disturbed kinematics visible in one of the group members and the presence of tidal dwarf systems. A diffuse tail extending in the direction opposite to the cluster centre is also detected, hinting at a global ram-pressure stripping of the intragroup material as BIG falls inside A1367. Based on the analysis of spatially resolved emission line maps, we identify multiple ionization mechanisms for the diffuse gas filaments, including in situ photoionization from embedded H II regions and shocks. Combining spatially resolved kinematics and line ratios, we rule out the association of the most massive galaxy, CGCG097-120, with the group as this system appears to be decoupled from the intragroup medium and subject to strong ram pressure as it falls into A1367. Through our new analysis, we conclude that BIG is shaped by pre-processing produced by gravitational interactions in the Local Group environment combined with ram-pressure stripping by the global cluster halo.