Miracle-dz/UniFAR-FTUs huggingface dataset:
Toward explaining Seyfert galaxies

Galaxies with extensive star formation in their nuclei (star-burst galaxies) produce up to 10/sup 9/ M/sub sun/ of compact stellar remnants in their nuclei. Data for the kinematics of these remnants imply that a significant fraction can settle into nuclear volumes of radii 1 pc. It is suggested that this mechanism provides a source for large masses of accretors in galactic nuclei that can power Seyfert 1 galaxies. In the scenario presented. Seyfert 1 galaxies, and conceivably even luminous quasars, are powered not by a single massive black hole but by large numbers of small accretors, black holes or neutron stars, left after processes of stellar evolution.
Anomalous photovoltaic effect in thin films of ZnSe obliquely deposited in vacuum

An anomalous photovoltaic effect (APE) has been observed in thin films of zinc selenide obliquely deposited in vacuum for the first time. Photovoltages of up to 70 V have been measured in some samples. The effect is influenced strongly by some experimental parameters. The changes in the photovoltages may be attributed to the film structure which has been investigated during the course of this study.
Does Partner Asymmetry Facilitate Innovation Speed? Organizational Learning and Social Exchange Perspectives

The right partner and high innovation speed are crucial for a successful research and development (R&D) alliance in the high-tech industry. Does homogeneity or heterogeneity between partners benefit innovation speed? This study examined the links between partner asymmetries (technological heterogeneity and network resource asymmetry) and innovative speed from both economic and social dual perspectives by focusing on biopharmaceutical industries. The results revealed an inverse U-shaped relationship between technology heterogeneity and innovation speed. In addition, a positive linear relationship exists between network resource asymmetry and innovation speed for 1991–2000 alliances and for biotech–biotech partner-type alliances; significantly negative moderating effects of time to market occurred on these linear relations. Finally, this study makes important theoretical and practical contributions to partner selection literature on R&D alliances in the biopharmaceutical industry.
Photoluminescence study of Cu diffusion and electromigration in CdTe

We report changes in the photoluminescence (PL) spectra associated with the diffusion of Cu in CdTe thin films used in CdTe/CdS solar cells. We studied films grown by vapor transport deposition and radio-frequency sputtering as well as single-crystal CdTe. The main effects of Cu diffusion appear to be the quenching of a donor-acceptor transition associated with Cd vacancies and the increase in intensity of a lower energy band due to deep acceptor states. The changes in junction PL are consistent with the movement of Cu+ ions in the electric fields near the CdS/CdTe junction.
Allosteric Activation of 15‐Lipoxygenase‐1 by Boswellic Acid Induces the Lipid Mediator Class Switch to Promote Resolution of Inflammation

Specialized pro‐resolving mediators (SPM), primarily produced in innate immune cells, exert crucial bioactions for resolving inflammation. Among various lipoxygenases (LOX), 15‐LOX‐1 is key for SPM biosynthesis, but cellular activation principles of 15‐LOX‐1 are unexplored. It was shown that 3‐O‐acetyl‐11‐keto‐β‐boswellic acid (AKBA) shifts 5‐LOX regiospecificity from 5‐ to 12‐lipoxygenation products. Here, it is demonstrated that AKBA additionally activates cellular 15‐LOX‐1 via an allosteric site accomplishing robust SPM formation in innate immune cells, particularly in M2 macrophages. Compared to ionophore, AKBA‐induced LOX activation is Ca2+‐ and phosphorylation‐independent, with modest induction of 5‐LOX products. AKBA docks into a groove between the catalytic and regulatory domains of 15‐LOX‐1 interacting with R98; replacement of R98 by alanine abolishes AKBA‐induced 15‐LOX product formation in HEK293 cells. In zymosan‐induced murine peritonitis, AKBA strikingly elevates SPM levels and promotes inflammation resolution. Together, targeted allosteric modulation of LOX activities governs SPM formation and offers new concepts for inflammation resolution pharmacotherapy.
Report of A Family with Adult‐Onset Leukoencephalopathy with Axonal Spheroids and Pigmented Glia (ALSP) Without Mutations in CSF1R, AARS1 or AARS2

Adult‐onset leukoencephalopathy with axonal spheroids and pigmented glia (ALSP) is a rare neurodegenerative disorder with characteristic clinicopathological features. Identification of pathogenic mutations in CSF1R, AARS1, and AARS2 genes led to increased recognition and diagnosis of the ALSP.
Electric and Kinematic Structure of the Oklahoma Mesoscale Convective System of 7 June 1989

Abstract Balloon soundings of electric field in Oklahoma mesoscale convective systems (MCS's) were made by the National Severe Storms Laboratory (NSSL) during the spring of 1989. A sounding made in the rearward edge of an MCS stratiform rain area on 7 June 1989 is the centerpiece of this study. We used data from Doppler radars, a lightning ground-strike location system, satellite, and other sources to relate the mesoscale attributes of the MCS to the observed electric-field profile. The stratiform area did not lag an organized convective line, but was apparently initiated by anvil precipitation downwind of convective cells that were at the west and southwest flanks of the MCS. The mature system produced a bipolar cloud-to-ground lightning pattern, in which most flashes of positive polarity came to ground in the downshear anvil or stratiform region. The bipole was oriented from 220°, parrallel to upper-level geostrophic flow, and its length was 190 km. We visually observed lightning flashes in the stratifo.
The Initial Mass Function and Massive Star Evolution in the OB Associations of the Northern Milky Way

We investigate the massive star content of Milky Way clusters and OB associations in order to answer three questions: (1) How coeval is star formation? (2) How constant is the initial mass function (IMF)? (3) What is the progenitor mass of Wolf-Rayet stars? Our sample includes NGC 6823/Vul OB1, NGC 6871/Cyg OB3, Berkeley 86/Cyg OB1, NGC 6983/Cyg OB1, NGC 7235, NGC 7380/Cep OB1, Cep OB5, IC 1805/Gas OB6, NGC 1893/Aug OB2, and NGC 2244/Mon OB2. Large-field CCD imaging and multiobject, fiber spectroscopy has resulted in UBV photometry for >14000 stars and new spectral types for approximate to 200 stars. These data are used to redetermine distances and reddenings for these regions and to help exclude probable nonmembers in constructing the H-R diagrams. We reanalyze comparable data previously published on Cyg OB2, Tr 14/16, and NGC 6611 and use all of these to paint a picture of star formation and to measure the IMFs. We find the following: (1) Most of the massive stars are born during a period Delta tau 7 M. A comparison with similarly studied OB associations in the Magellanic Clouds reveals no difference in IMF slope, and hence we conclude that starformation of massive stars in clusters proceeds independently of metallicity, at least between z = 0.02 and z = 0.002. The masses of the highest mass stars are approximately equal in the Milky Way, LMC, and SMC associations, contrary to the expectation that this value should vary by a factor of 3 over this metallicity range. We conclude that radiation pressure on grains must not limit the mass of the highest mass star that can form, in accord with the suggestion of Wolfire & Cassinelli that the mere existence of massive stars suggests that shocks or other mechanisms have disrupted grains in star-forming events. (3) The four Wolf-Rayet stars in our sample have come from stars more massive than 40 M. ; one WC star and one late-type WN star each appear to have come from very massive (approximate to 100 M.) progenitors.
Electron density and temperature of the lower solar corona

Off limb observations of the quiet Sun corona were made with the Coronal Diagnostic Spectrometer (CDS) on SOHO during the Whole Sun Month campaign in August 1996. Selected spectral lines in the Normal Incidence range were recorded up to 1.2 solar radii above the east and west limb and above the polar coronal holes. Intensities of the coronal lines covering the temperature range from 9 × 105 to 2 × 106 K have been measured and used to derive electron temperature and electron density as a function of the radial distance above the solar limb. Results from the east and west equatorial regions and polar coronal holes are compared. The temperature and density in the coronal holes is found to be lower than in the closed field regions. A density-sensitive line ratio of Si IX 350/342 A is used to derive an average electron density which is found to decrease from 5 × 108 cm−3 near the limb to 1 × 108 cm−3 at 1.15RS, in the equatorial region. Over the polar coronal holes, where polar plumes dominate the emission close to the limb, the density varies from 2 × 108 cm−3 at the limb to 6 × 107 cm−3 at 1.1RS. The lowest density found inside the coronal hole on the disk is 9.9 × 107 cm−3. An increase in the quiet Sun temperature with the radial distance is found from the Si XII/Mg X and Si XII/Mg IX line ratios, and an increase in the coronal hole temperature is seen from the Mg X/Mg IX ratio. The Si XII/Mg X temperature varies from 1.1 × 106 K at r = RS to 1.4 × 106 K at r = 1.2RS in the equatorial regions. The EUV emission is compared with that of the soft X rays as measured by the Yohkoh SXT. The densities and temperatures determined from the SXT show a similar behavior to that determined from the CDS. Density and temperature, averaged over a position angle range of 20 – 54°, show very little variation over a period of 20 days.
Cluster observations of electrostatic solitary waves near the Earth's bow shock

[1] Using a period of internal burst mode data from the Cluster Electric Field and Wave instrument a number of electrostatic solitary structures have been identified in the foot region of Earth's quasi-perpendicular bow shock. The four individual probe potential measurements are utilized to investigate the fundamental characteristics of the solitary wave structures such as wave propagation vector, propagation velocity, scale-size and potential amplitude. Two classes of waves are observed. Bipolar solitary waves typically propagate in the solar wind direction toward the shock but at a significant angle from the ambient magnetic field. Unipolar/tripolar solitary waves tend to propagate along the ambient magnetic field. The wave amplitude-scale size relation is similar to that obtained for similar structures observed in the auroral zone. The structures lie in the theoretically allowed region in width-amplitude space to be consistent with the BGK ion holes. Using a period of internal burst mode data from the Cluster Electric Field and Wave instrument a number of electrostatic solitary structures have been identified in the foot region of Earth's quasi-perpendicular bow shock. The four individual probe potential measurements are utilized to investigate the fundamental characteristics of the solitary wave structures such as wave propagation vector, propagation velocity, scale-size and potential amplitude. Two classes of waves are observed. Bipolar solitary waves typically propagate in the solar wind direction toward the shock but at a significant angle to the ambient magnetic field in contrast to most previous studies which assume parallel propagation to the ambient magnetic field. In contrast, unipolar/tripolar solitary waves tend to propagate along the ambient magnetic field. The wave amplitude-scale size relation is similar to that obtained for structures observed in the auroral zone. The structures lie in the theoretically allowed region in width-amplitude space to be consistent with the BGK (Bernstein-Greene-Kruskal) ion holes. The two classes of observed solitary waves may greatly influence the ambient plasma dynamics around the shock. The bipolar solitary waves do not exhibit a large net potential difference but may still play an important role in plasma thermalisation by particle scattering. Unipolar/tripolar solitary waves exhibit a remarkable net potential difference that may be responsible for the plasma energisation along the ambient magnetic field.
Photoionized and Photodissociated Regions around Main-Sequence Stars

Within a molecular cloud, the strong ultraviolet radiation field produced by newly formed stars dissociates and ionizes the surrounding molecular gas. The radiative flux depends on the effective temperature and metallicity of the star. Using the most recent line-blanketed atmosphere models from Kurucz, we obtain the rates of ionizing and dissociating photons from stars with effective temperatures of 7.5 × 103 to 5 × 104 K, and for metallicities between 0.01 times solar and solar. With a radiative transfer model, we then compute the basic structures and sizes of the photoionized and photodissociated regions produced by stars embedded in a molecular gas with uniform densities. Absorption of the UV flux by dust decreases the mass of H II and H I produced within the cloud, and its effects are taken into account in our model. We also discuss the constraints imposed by photodissociated regions on the number of intermediate- and high-mass stars that can form in molecular clouds.
Hydrodynamics of oscillating atomic force microscopy cantilevers in viscous fluids

We present a study of thermal noise of commercially available atomic force microscopy (AFM) cantilevers in air and in water. The purpose of this work is to investigate the oscillation behavior of a clamped AFM microlever in liquids. Up to eight vibration modes are recorded. The experimental results are compared to theoretical predictions from the hydrodynamic functions corresponding to rigid transverse oscillations of an infinitely long rectangular beam. Except for the low-frequency modes, the known hydrodynamic functions cannot describe the amount of dissipated energy due to the liquid motion induced by the cantilever oscillation. The observed variation of the damping coefficient is smaller than the one predicted. The difference at higher modes between the mentioned theoretical description and experimental results is discussed with the help of numerical solutions of the three-dimensional Navier–Stokes equation.
Managing Workforce Diversity and Inclusion: A Critical Review and Future Directions

Fundamental worldwide economic, socio-demographic, and regulatory shifts are largely responsible for the spike in interest in the topic of Diversity and Inclusion (D&I) in the workplace. Existing research indicates that the focus on workforce diversity and inclusion has attained worldwide currency among HR managers and organizational leaders. However, its enactment remains challenging, partly as its conceptual operationalization is plagued by national, cultural, institutional, and interpersonal barriers. Moreover, there appears to be a gap between the rhetoric of D&I and the idiosyncrasies of its implementation. This gap should be bridged to foster D&I and embed it in the organizational system. To achieve this, we argue that organizations are expected to foster the development of diverse communities of practice; these communities could reshape corporate policies and practices, promote meaningful interactions, serve to develop a shared identity that will challenge entrenched beliefs, and create new artifacts and working cultures. The latter could lead to a restructure of current organizational structures and a reformation of tokenistic joint missions and values. This critical review will assess and highlight recent advancements in the D&I management literature while presenting a broader perspective on the practices at the heart of the field. The conclusion of the study considers potential future avenues for D&I management research and practice.
Photometric Observations of Southern Abell Clusters Redshifts Survey Clusters: Galaxy Luminosity Profiles

We have analyzed CCD images of 14 Abell clusters in the R filter of the Southern Abell Clusters Redshifts Survey (SARS) with cz < 40,000 km s-1. We have obtained the luminosity profiles for 507 galaxies, of which 232 (46%) have known redshifts. In order to fit the luminosity profiles, we used the de Vaucouleurs law for bulge systems and an exponential profile for disk systems, and we also fitted the Sérsic's law (rn) to all galaxy profiles. We have found that 162 galaxies (32%) in the sample have pure r1/4 profiles, 168 (33%) have pure exponential profiles, and 93 (18%) have luminosity profiles that are well fitted by a combination of bulge and disk profiles. On the other hand, we could not fit the classical bulge + disk profile to the remaining 84 galaxies (17%) of the sample. For such cases we have used only the Sérsic law. We have also analyzed how seeing and sky cleaning affect the structural and photometric parameters obtained through profile fitting. In addition, we have studied several relations between these parameters. We have found that bulges and disks show consistency with a unique relation in the μe– log re plane. We also found that bulges and disks obey a magnitude-size relation in the sense that large bulges and disks (large re values) have high luminosities. On the other hand, Sérsic-law fitting parameters n, rs, and μs show a strong correlation, in agreement with the findings of other authors, suggesting that not only elliptical galaxies but all galaxies are likely to be understood as a one-parameter family.
The Study of Pedestrian Flow Based on a Macroscopic Model

In this paper, a macroscopic crowd model is developed to simulate pedestrian flow characteristics and walking behaviors in a facility scattered with an obstacle. Pedestrians are assumed to walk towards a desired destination deviating from the path of shortest travel time according to the environmental factors. Some preliminary numerical results demonstrate reasonable path choice strategy for pedestrians can reduce the chance of traffic congestion occurring.
Purifying Low-Light Images via Near-Infrared Enlightened Image

Cameras usually produce low-quality images under low-light conditions. Though many methods have been proposed to enhance the visibility of low-light images, they are mainly designed for illumination correction and less capable of suppressing the artifacts. In this paper, we propose to enhance the visibility and suppress artifacts by purifying low-light images under the guidance of the NIR enlightened image captured by using the near-infrared light as compensation. Specifically, we introduce a disentanglement framework to disentangle the structure and color components from the NIR enlightened and RGB images, respectively. Correspondingly, we introduce a new dataset with the RGB and NIR enlightened images for training and evaluation purposes. The experimental results show that our proposed method achieves promising results.
Android-Based Learning Media Development Strategies During Pandemic Times To Improve Student Science Literature

This study aims to develop appropriate android-based learning media to improve students' scientific literacy. This study uses the Four D model procedure. In addition to developing android-based media, this research also develops a syllabus, lesson plans, and scientific literacy instruments. This research was conducted in one of the Surya Private Junior High Schools in Pematangsiantar City. The validation of android-based learning media was carried out by three validators of media experts and material experts. Expert validation data analysis was carried out using the Pearson validation formula. The feasibility study of android-based learning products shows validity of 85% with very valid criteria. The results of the media feasibility study obtained an average score of 90%. The syllabus obtained an average score of 84%, lesson plans obtained an average score of 84%, and scientific literacy instruments obtained an average score of 85%. In conclusion, android-based media products on natural science material are feasible to be implemented in learning, especially during the covid-19 pandemic.
High Frequency Impedance Spectroscopy of Water-Filled Single Well in a Flat-Bottom Plate

This paper proposes the concept of high frequency impedance spectroscopy applied to a single water-filled well in a flat-bottom cell culture plate. A ring-circular electrode pair is attached at the well bottom to generate the electric field. Geometrical parameters including the radius of the circular electrode and the gap between the center and the surrounding electrode are studied to investigate the sensitivity of the sensing platform. In addition, the thickness of the well bottom was also varied with the values of 1.24 mm, 0.5 mm and 0.1 mm. The frequency responses including reflection coefficient, conductance and susceptance are simulated and compared for all case studies. The result shows that the electrode pair with narrower gap and larger radius of the center electrode provides more sensitive frequency responses in the presence of water in the well. Well base thickness also has a direct influence on the frequency response. A thin well base leads to high sensitivity of the impedance spectroscopy. The proposed design can be applied for monitoring of biological cells cultivated in cell culture plates in the future.
DH-LC: Hierarchical Matching and Hybrid Bundle Adjustment Towards Accurate and Robust Loop Closure

A loop closure module plays an important role in visual SLAM systems, which can reduce the accumulat-ed drift. This task faces the challenges of large viewpoint changes and expensive computational costs when optimizing the global map. This paper proposes DH-LC, a novel accurate and robust loop closure method that consists of hierarchical spatial feature matching (HSFM) and hybrid bundle adjustment (HBA). HSFM estimates a reliable relative pose between the query image and the retrieval image in a coarse-to-fine way. Specifically, 3D points are firstly triangulated and then clus-tered according to the spatial distribution. The cluster centers estimate coarse cube-level matching pairs in a larger perception field which can tolerate large viewpoint changes. HBA optimizes the global map efficiently by adaptively selecting incremental bundle adjustment or full bundle adjustment according to the accumulated drift and relative pose verification in the temporal window. Experimental results demonstrate that our proposed method easily detects loops in large viewpoint changes and efficiently optimizes the global map. When compared with the state-of-the-art methods, our method increases loop closure recall and improves SLAM localization accuracy with reducing the accumulated drift.
Calibration of Volatility: Coupling between alternative regularization strategy and Dupire’s Equation

We propose in this work a Tikhonov regularization method for a calibration problem. The goal is to identify the local volatility from some observed option prices on the market. The proposed method, is used by N.ElHassan (Chiarella, Craddock and El-Hassan, 2007) and Lagnado and Osher (Lagnado and Osher, 1997) using a Black-Scholes model, in this paper we propose to use Dupire model coupled with the optimization algorithms proposed in (Chiarella et al., 2007) and (Lagnado and Osher, 1997). In order to improve the approximation of the initial guess of the volatility we propose to use a statistical approximation. The obtained results are compared with those obtained by N.El Hassan and with Lamarti (Aboulaich and Lamarti, 2013) which proposes another algorithm named ”jump indicator” in the case of a discontinuous volatility.