Miracle-dz/UniFAR-FTUs huggingface dataset:
Wound healing therapeutic effect of chitosan nanofibers: a systematic review and meta- analysis of animal studies

Review question / Objective: Review question: Does chitosan base nanofibers has significant wound healing therapeutics effects in animal models? A preclinical systematic review of intervention will be carried out to evaluate the therapeutic effects of chitosan nanofibers on animal skin lesions. The PICO (Population, Intervention, Comparator, Outcome) scheme will be used: Intervention: full-thickness skin lesions, and the application of chitosan nanofibers as treatment for animal skin lesions. Regardless of the concentration of chitosan or other added compounds used. Comparison: No intervention, topical placebo agents and standard skin lesions treatments will be included. Outcome: wound healing area, wound closure, type of wound closure (first, second or third intention), healing time, infectious processes (antibacterial/antifungal properties), blood loss (hemostatic properties) and adverse effects.
Spatiotemporal Assessment of SO2, SO4 and AOD from over MENA Domain from 2006-2016 Using Multiple Satellite and Reanalysis MERRA-2 Data

The sulfur pollutants are the source of a sizeable portion of the air pollution. In this work, the recent spatiotemporal distribution and trend of the mass concentration of two of the critical sulfur pollutants, SO2 and SO4, in addition to the aerosol optical properties (AOD) were analyzed over the region of the Middle East and North Africa (MENA) from satellite and Modern Era-Retrospective Analysis for Research and Applications version 2 (MERRA-2) reanalysis data. The SO2 and SO4 data used in these analyses are obtained from (MERRA-2) with a resolution of 0.5° × 0.625° throughout a period of 10 years (2005-2015). On the other hand, the temporal trend and spatial distribution of AOD were identified from four different satellite data. 1) moderate-resolution imaging spectroradiometer (MODIS) Level 3 AOD data at 550 nm wavelengths from Collection 6 algorithm (combined dark target and deep blue algorithms) are used for 10 years temporal analysis (2006-2015). 2) Multi-angle imaging spectroradiometer (MISR) with 0.5 deg spatial resolution for the same 10 years (2006-2015). 3) Sea-Viewing Wide Field-of-View Sensor (SeaWIFS) with 0.5 deg for the period (2005-2010). 4) Ozone Monitoring Instrument (OMI) AOD at 500 nm wavelength with resolution 1 degree. This study presents more resent 10 years of Spatiotemporal of SO2, SO4 and AOD over MENA domain.
Newtonian and General Relativistic models of spherical shells

A family of spherical shells with varying thickness is derived by using a simple Newtonian potential–density pair. Then, a particular isotropic form of a metric in spherical coordinates is used to construct a General Relativistic version of the Newtonian family of shells. The matter of these relativistic shells presents equal azimuthal and polar pressures, while the radial pressure is a constant times the tangential pressure. We also make a first study of stability of both the Newtonian and relativistic families of shells.
ENVIRONMENT CARRYING CAPACITY OF ECOTOURISM IN AEK NAULI RESEARCH FOREST, SIMALUNGUN REGENCY, NORTH SUMATERA

Currently, ecotourism has become an important industry because of its rapid development. Many tourism practices have adverse environmental impacts. Due to the increasingly destructive commercialization of the natural resources on which we depend, there are several negative impacts. Aek Nauli Research Forest (ANRF), with an area of 1,900 hectares, is one of the natural tourist destinations around the Lake Toba Tourism area managed by the Aek Nauli Research Institute for Environmental and Forestry Development (BP2LHK). The location of the study is in Girsang District, Sipangan Bolon, Simalungun Regency, North Sumatera Province. The tourist objects are natural panorama, elephant conservation education tour, and siamang animal ape park. On average, the number of visitors of ANRF on regular days is 100-300 visitors/day and on holidays reaches 300-1,700 visitors/day. The increase in the number of visitors is perceived to have an impact on environmental sustainability. This study aims to determine the capacity of the ANRF ecotourism area to accommodate the number of tourists per day simultaneously. The method used is the effective carrying capacity by Cifuentes method based on several stages of analysis, namely Physical Capacity (PCC), Real Capacity (RCC), Management Capacity (MC), and Effective Capacity (ECC). The environmental carrying capacity analysis results showed that the PCC, RCC, ECC were 26,106 visitors/day, 3,007 visitors/day, 2,505 visitors/day respectively while MC was 0.83. This value can be used to advise managers to limit visitors, particularly during peak season, in order to preserve objects and the quality of visits.
A comprehensive survey of collaborative biostatistics units in academic health centers

The organizational structures of collaborative biostatistics units in academic health centers (AHCs) in the United States and their important contributions to research are an evolving and active area of discussion and inquiry. Collaborative biostatistics units may serve as a centralized resource to investigators across various disciplines or as shared infrastructure for investigators within a discipline (e.g., cancer), or a combination of both. The characteristics of such units vary greatly, and there has been no comprehensive review of their organizational structures described in the literature to date. This manuscript summarizes the current infrastructure of such units using responses from 129 leaders. Most leaders were over 45 years old, held doctoral degrees, and were on a 12‐month appointment. Over half were tenured or on a tenure track and held primary appointments in a school of medicine. Career advancement metrics most important included being funded as co‐investigator on NIH grants and being either first or second author on peer‐reviewed publications. Team composition was diverse in terms of expertise and training, and funding sources were typically hybrid. These results provide a benchmark for collaboration models and evaluation and may be used by institutional administrators as they build, evaluate, or restructure current collaborative quantitative support infrastructure.
MANET: Mitral Annulus Point Tracking Network in Cardiac Magnetic Resonance

Cardiac magnetic resonance (CMR) imaging is frequently recommended for patients at intermediate risk of cardiovascular disease to triage them for medication or invasive aggressive treatment. Mitral annulus (MA) motion and velocities represent the cardiac contraction and relaxation, and hold potential to improve the detection of subtle cardiac dysfunction. However, conventional interpretation of CMR images requires expert manipulation and is often operator-dependent. In this paper, we propose an end-to-end MA Point Tracking Network (MANet) to automatically detect and track MA motion during cardiac cycle. The MANet model consists of MA point detection module and motion tracking module. In MA point detection, we design the convolutional-based feature extraction and elastic regression to detect MA points frame by frame of each CMR video. Then, in MA tracking, we adopt the Deep SORT model to capture spatio-temporal continuity between frames and fine-tune the coordinate position of MA points. 171 CMR videos with 4275 frames are used in comparison experiments, and the results demonstrate that our MANet model achieves promising performance in reference to clinical ground truth (r=0.71, P<0.001). This work provides an important preamble for cardiac motion tracking and cardiac function evaluation.
Ultra-high energy neutrino fluxes: new constraints and implications

We apply new upper limits on neutrino fluxes and the diffuse extragalactic component of the GeV γ-ray flux to various scenarios for ultra-high energy cosmic rays and neutrinos. As a result we find that extragalactic top-down sources cannot contribute significantly to the observed flux of highest energy cosmic rays, except if the AGASA flux normalization is too high by at least a factor of two. The explanation of the observed ultra-high energy cosmic ray flux by the decay products of Z bosons produced in ultra-high energy neutrino interaction with relic neutrino background is ruled out by recent data from GLUE and FORTE experiments, provided cosmological limits on neutrino mass and clustering apply.
The scatter of the M dwarf mass–radius relationship

M dwarfs are prime targets in the hunt for habitable worlds around other stars. This is due to their abundance as well as their small radii and low masses and temperatures, which facilitate the detection of temperate, rocky planets in orbit around them. However, the fundamental properties of M dwarfs are difficult to constrain, often limiting our ability to characterize the planets they host. Here we test several theoretical relationships for M dwarfs by measuring 23 high-precision, model-independent masses and radii for M dwarfs in binaries with white dwarfs. We find a large scatter in the radii of these low-mass stars, with 25 per cent having radii consistent with theoretical models while the rest are up to 12 per cent overinflated. This scatter is seen in both partially and fully convective M dwarfs. No clear trend is seen between the overinflation and age or metallicity, but there are indications that the radii of slowly rotating M dwarfs are more consistent with predictions, albeit with a similar amount of scatter in the measurements compared to more rapidly rotating M dwarfs. The sample of M dwarfs in close binaries with white dwarfs appears indistinguishable from other M dwarf samples, implying that common envelope evolution has a negligible impact on their structure. We conclude that theoretical and empirical mass–radius relationships lack the precision and accuracy required to measure the fundamental parameters of M dwarfs well enough to determine the internal structure and bulk composition of the planets they host.
On gravitational Phase Transitions, T-duality and Symmetry Breaking in AdS/CFT

In this thesis we study several problems in the context of AdS/CFT. The first is that of gravitational phase transitions between AdS and dS geometries in the Gauss-Bonnet theory of gravity. Such transitions are mediated by thermalons and do not require matter fields. The phenomenon is strongly expected to be generic in higher curvatures theories of gravity. The second problem is the generation of new Supergravity backgrounds and the study of their holographic duals. We generate new examples of supersymmetric flows from $AdS_5$ in the UV to $AdS_3$ in the IR. The new solutions are found to be holographically related to long linear quiver gauge theories. Finally we derive the Ward identities of 1+1 QFT using AdS/CFT. This is achieved by holographic renormalization with special boundary terms. The resulting Ward identities are the same as in higher dimensions and they show the expected symmetry breaking for large N.
Pre-discovery Observations and Orbit of Comet C/2017 K2 (PANSTARRS)

We present a study of comet C/2017 K2 (PANSTARRS) using pre-discovery archival data taken from 2013 to 2017. Our measurements show that the comet has been marginally increasing in activity since at least 2013 May (heliocentric distance of pre-perihelion). We estimate the mass-loss rate during the period 2013–2017 as kg s−1, which requires a minimum active surface area of ∼10–102 km2 for sublimation of supervolatiles such as CO and CO2, by assuming a nominal cometary albedo . The corresponding lower limit to the nucleus radius is a few kilometers. Our Monte Carlo dust simulations show that dust grains in the coma are in radius, with ejection speeds from ∼1 to 3 m s−1, and have been emitted in a protracted manner since 2013, confirming estimates by Jewitt et al. The current heliocentric orbit is hyperbolic. Our N-body backward dynamical integration of the orbit suggests that the comet is most likely (with a probability of ∼98%) from the Oort spike. The calculated median reciprocal of the semimajor axis 1 Myr ago was au−1 (in a reference system centered on the solar-system barycenter).
A Floquet formalism for the interaction of magnetically trapped atoms with rf fields

A many-mode Floquet theory (MMFT) formalism is applied to study the interaction of a polychromatic rf field with cold atoms trapped in a quadrupole magnetic trap. The validity of the MMFT approach is first established by comparing its results with those of the previously used formalisms for the cases of single- and two-frequency rf fields. The effect of truncation of the infinite matrices has been studied and a suitable truncation order is obtained for the numerical implementations. The results obtained for the composite atom–field system has shown some exquisite features such as lattice-like periodic variation in the eigen-energies and large two-photon transition probabilities between the atomic states. Dependence of the trapping parameters such as trap position, depth and width on the rf field parameters like field strength and mode separation has also been studied. This work predicts the generation of lattice type atom-trapping geometries which can be controlled by varying the rf field parameters of a polychromatic rf field.
Pacific Association for Computational Linguistics ( PACLING 2011 ) Named Entity Recognition for Short Text Messages

This paper describes a named entity recognition (NER) system for short text messages (SMS) running on a mobile platform. Most NER systems deal with text that is structured, formal, well written, with a good grammatical structure, and few spelling errors. SMS text messages lack these qualities and have instead a short-handed and mixed language studded with emoticons, which makes NER a challenge on this kind of material. We implemented a system that recognizes named entities from SMSes written in Swedish and that runs on an Android cellular telephone. The entities extracted are locations, names, dates, times, and telephone numbers with the idea that extraction of these entities could be utilized by other applications running on the telephone. We started from a regular expression implementation that we complemented with classifiers using logistic regression. We optimized the recognition so that the incoming text messages could be processed on the telephone with a fast response time. We reached an F-score of 86 for strict matches and 89 for partial matches. © 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of PACLING 2011
Pulsar rotation with superfluid entrainment

Large pulsar glitches (like the ones detected in the Vela) are though to be a consequence of the superfluid component present in the interior of mature neutron stars: this component can rotate differentially with respect to the normal part of the star, storing the angular momentum needed to produce the observed sudden decrease of the pulsar rotational period. However strong entrainment (a non-dissipative effect that couples the superfluid component with the non-superfluid component inside the star) challenges this picture. Here we study the impact of entrainment on the angular momentum that can be exchanged between the normal component and the superfluid during a glitch by means of a consistent global model. This allows to estimate the maximum angular momentum reservoir stored into the superfluid component of the star: the essential ingredient are newly calculated mesoscopic pinning forces that block the superfluid vorticity in the crust of the neutron star. This method can also provide a quantitative test for global models of rotating neutron stars, as well as for microphysical inputs present in literature (like entrainment parameters and pinning forces).
Control of interlayer physics in 2H transition metal dichalcogenides

It is assessed in detail both experimentally and theoretically how the interlayer coupling of transition metal dichalcogenides controls the electronic properties of the respective devices. Gated transition metal dichalcogenide structures show electrons and holes to either localize in individual monolayers, or delocalize beyond multiple layers—depending on the balance between spin-orbit interaction and interlayer hopping. This balance depends on the layer thickness, momentum space symmetry points, and applied gate fields. The design range of this balance, the effective Fermi levels, and all relevant effective masses is analyzed in great detail. A good quantitative agreement of predictions and measurements of the quantum confined Stark effect in gated MoS2 systems unveils intralayer excitons as the major source for the observed photoluminescence.
Exploring the shell model of high-velocity features of Type Ia supernovae using tardis

We explore the possible nature of high-velocity features in Type~Ia supernovae by presenting synthetic spectra generated from hydrodynamic models of interaction between the supernova and a compact circumstellar shell. We use TARDIS to compute the spectra and compare model spectra to data from SN~2011fe at 2, 5, and 9 days after the explosion. We apply abundance models to the shells that consist of either a hydrogen, helium, or carbon-oxygen substrate with overall solar abundance of metals and depletion or enhancement of calcium abundance. We vary the calcium abundances in the shell and the ejecta to study the effect on the photospheric and high-velocity components of the calcium near-infrared triplet. The substrate leaves no imprint upon the spectra, but helium substrates are discouraged by demanding excessive calcium abundances. We find that we can approximately reproduce the blended high-velocity and photospheric velocity features at 2 and 5 days. The 9 day spectrum shows a distinct high-velocity component of the line. We are unable to reproduce this specific feature with the current models. We also explore helium-shell double detonation models, finding they tend to give no high-velocity features or excessively strong features. A very carefully chosen helium-shell mass might give a reasonable reproduction of the observed calcium features. We discuss the implications of our models for the nature of high-velocity features and their significance to the evolution and explosion of SN~Ia.
Corporate Sustainability and Service Innovation; Moderating role of absorptive capacity

Purpose: The study’s goal is to examine the effect of corporate sustainability dimensions on service innovation. It further investigates the moderating role of the absorptive capability of the firm.Design/methodology/approach: Using purposive sampling, data are collected from individuals in service firms across diverse industrial sectors in Ghana. A total of 628 questionnaires were dispersed to diverse service enterprises within the period from March 2021 to June 2021. After the data collection, the response rate achieved was 82% translating into over 500 answered questionnaires. A total of 514 answered questionnaires are used for empirical analysis.Findings/results: The outcome of the study indicates environmental sustainability practices, economic sustainability practices and social sustainability practices had an impact on the service innovation process and outcome. In addition, absorptive capabilities of service enterprises are found to positively moderate the link amid the scopes of corporate sustainability practices and service innovation.Practical implications: Managers and firms need to implement their internal innovation capabilities in order to derive significant and positive effects on corporate sustainability practices. The integration of corporate sustainability and service innovation in small and medium enterprises (SMEs) is imperative.Originality/value: The outcome of the research contributes to the increasing body of literature on the liaison between corporate sustainability and service innovation by offering insights into environmental, social and economic sustainability practices. This shapes the sustainability direction and procedures towards the transmittal of value-added services.
Does the radial-tangential macroturbulence model adequately describe the spectral line broadening of solar-type stars?

In incorporating the effect of atmospheric turbulence in the broadening of spectral lines, the so-called radial-tangential macroturbulence (RTM) model has been widely used in the field of solar-type stars, which was devised from an intuitive appearance of granular velocity field of the Sun. Since this model assumes that turbulent motions are restricted to only radial and tangential directions, it has a special broadening function with notably narrow width due to the projection effect, the validity of which has not yet been confirmed in practice. With an aim to check whether this RTM model adequately represents the actual solar photospheric velocity field, we carried out an extensive study on the non-thermal velocity dispersion along the line-of-sight (V_los) by analyzing spectral lines at various points of the solar disk based on locally-averaged as well as high spatial-resolution spectra, and found the following results. First, the center-to-limb run of V_los derived from ground-based low-resolution spectra is simply monotonic with a slightly increasing tendency, which contradicts the specific trend (an appreciable peak at theta~45 deg) predicted from RTM. Second, the V_los values derived from a large number of spectra based on high-resolution space observation revealed to follow a nearly normal distribution, without any sign of peculiar distribution expected for the RTM case. These two observational facts indicate that the actual solar velocity field is not such simply dichotomous as assumed in RTM, but directionally more chaotic. We thus conclude that RTM is not an adequate model at least for solar-type stars, which would significantly overestimate the turbulent velocity dispersion by a factor of ~2. The classical Gaussian macroturbulence model should be more reasonable in this respect.
Numerical simulation of flows in a circular pipe transversely subjected to a localized impulsive body force with applications to blunt traumatic aortic rupture

Much debate surrounds the mechanisms responsible for the occurrence of blunt traumatic aortic rupture in car accidents, particularly on the role of the inertial body force experienced by the blood due to the abrupt deceleration. The isolated influence of such body forces acting on even simple fluid flows is a fundamental problem in fluid dynamics that has not been thoroughly investigated. This study numerically investigates the fundamental physical problem, where the pulsatile flow in a straight circular pipe is subjected to a transverse body force on a localized volume of fluid. The body force is applied as a brief rectangular impulse in three distinct cases, namely during the accelerating, peak, and decelerating phases of the pulsatile flow. A dimensionless number, termed the degree of influence of the body force (Ψ), is devised to quantify the relative strength of the body force over the flow inertia. The impact induces counter-rotating cross-stream vortices at the boundaries of the forced section accompanied by complex secondary flow structures. This secondary flow is found to develop slowest for an impact occurring during an accelerating flow and fastest during a decelerating flow. The peak skewness of the velocity field, however, occurred at successively later times for the three respective cases. After the impact, these secondary flows act to restore the unforced state and such dominant spatial structures are revealed by proper orthogonal decomposition of the velocity field. This work presents a new class of problems that requires further theoretical and experimental investigation.