Miracle-dz/UniFAR-FTUs huggingface dataset:
Galois theory of periodic orbits of rational maps

The periodic points of a rational mapping are roots of a polynomial. If the coefficients of the mapping are algebraic numbers, then the periodic orbits are also algebraic numbers. A sequence of algebraic number fields is naturally associated with rational mappings, namely the fields containing all orbits of a given period. The authors study the corresponding Galois groups. They show that the latter have subgroups that permute the points of an orbit in the same way as the dynamics. The subgroup having all orbits as invariant sets identifies a field which contains the multipliers of the orbits. They construct their minimal polynomial, thereby computing the multiplier of a cycle without computing the cycle itself. They show that the periodic orbits of the quadratic family are soluble by radicals if their period is less or equal to 4, and they exhibit examples of unsoluble orbits of period 5. Dynamics over algebraic number fields is discrete, and all numerical experiments are reproducible.
Modeling the effect of grain size and dislocation density on hysteretic magnetic properties in steels

In this article, the Jiles–Atherton model is modified to elucidate the variation of magnetic properties with grain size and dislocation density. The modified model predicts generally that coercive field increases with increasing dislocation density and inverse grain size and that remanent flux density and permeability at the coercive field decrease with increasing dislocation density and inverse grain size. Using the same model, it should be possible to model the effects of grain size and dislocation density on other magnetic measurements such as nonlinear harmonics of the flux density or Barkhausen noise.
Invariance par homotopie de la signature à coefficients dans un fibré presque plat.

Soient Fune variete compacte orientee de classe C°°, son groupe fondamental et la classe de Poperateur de signature dans le groupe de Jt-homologie K+ (F). La conjecture de Novikov enonce l'invariance par homotopie de l'image de dans K0 (Bn) ® Q (ou K0(Bn) est la ÄT-homologie ä support compact cf. e.g. [15]) par Tapplication classifiante /: F -> Bn, c'est-ä-dire l'egalite, modulo la torsion, de (f°g)*faw) avec f*(ov), ou g : W -> F est une equivalence d'homotopie de varietes compactes orientees.
Market Sensing Capability and Customer Relationship Management on Marketing Performance: Role E-Marketing Strategy

This study aims to investigate the effect of market sensing capability (MSC), customer relationship management (CRM) and Electronic-marketing strategy (e-MS) on marketing performance (MP). This study tries to solve the gap between market sensing capability and marketing performance. Respondents of this study were 192 owners or leaders of Muslim fashion SMEs in Central Java. A hierarchical regression analysis was used for data analysis. The results showed that market sensing capability and customer relationship management have a significant effect on e-marketing strategy and marketing performance. Furthermore, e-marketing strategy can mediate the relationship between market sensing capability and customer relationship management with marketing performance. Keywords—Market Sensing Capability; Customer Relationship Management; e-Marketing Strategy; Marketing Performance
Saturation of 1.064 μm absorption in Cr,Ca:Y3Al5O12 crystals

Saturation absorption experiments are conducted on the title compound at 1.064 μm with laser light propagating along both the [001] and [111] crystallographic axes. Rotation of the crystals about these axes during the experiments reveals that the transmission of the polarized 1.064 μm radiation is highly anisotropic in the saturation regime. The details of the anisotropy and saturation curves are explained using a simple model of subsets of optical centers along with a relevant set of rate equations. The ground and excited‐state absorption cross sections at 1.064 μm are calculated to be σgs=5.7(±2)×10−18 cm2 and σes=8(±2)×10−19 cm2, respectively, and the optimum crystallographic orientation for utilization in optical devices is discussed.
A Lattice-Reduction-Aided Sphere Decoder for Underwater Acoustic FBMC/OQAM Communications

Because of the inherent interference, it is difficult for filter-bank multi-carrier (FBMC) with the offset-quadrature amplitude modulation (OQAM) systems to achieve high-performance symbol detection, especially over the underwater acoustic (UWA) channels. This letter explores a novel receiver approach to solve this problem by establishing a unified transmission matrix (UTM) model and proposing a lattice-reduction-aided sphere decoder (LRA-SD). The simulation and sea trial results indicate that in the UWA FBMC/OQAM communication systems, the UTM-based LRA-SD outperforms the linear detectors and is more computationally efficient than the maximum likelihood (ML) detector.
Time-dependent accretion onto magnetic white dwarfs: Effects of cyclotron emission

Previous accretion models have shown that if the cooling is due to optically thin bremsstrahlung, the flow is unstable. The shock height oscillates with a period approx.1 s, which corresponds to the cooling time for parameters characteristic of the AM Her binaries. Here we show that the effects of cyclotron cooling stabilize the flow if the magnetic field is large enough. For a 0.5 M/sub sun/ white dwarf accreting 1 g cm S s , the flow is stable if B is more than or approximately equal to 2 x 10X gauss. We also show that the bremsstrahlung X-ray emission and the optical cyclotron emission are 180 out of phase when oscillations are present. The relevance of these calculations to the observed optical oscillations, with periods of approx.1 s, in two AM Her stars is discussed.
On the efficient application of weighted essentially nonoscillatory scheme

In this paper, the efficient application of high‐order weighted essentially nonoscillatory (WENO) reconstruction to the subsonic and transonic engineering problems is studied. On the basis of the physical considerations, two techniques are proposed to enhance the accuracy and efficiency of the WENO reconstruction. First, it is observed that the WENO scheme using characteristic variable has better accuracy and convergence speed than the scheme using primitive variable. For engineering problems with shock of moderate amplitude, on the basis of the Rankine–Hugoniot conditions, a simplified characteristic‐variable‐based WENO is developed. The simplified version significantly reduces the cost overhead without sacrificing the shock‐capturing capability. Second, in this work, it is found for viscous case that it is better to include the viscous effect. On the basis of a simple analysis, the viscous correction to the parameter ε in the WENO reconstruction is proposed. Numerical results indicate, with the proposed simplified characteristic‐variable‐based reconstruction and the viscous correction, that the nonlinear WENO interpolation is sharply activated in the region of shock jump, whereas in the shockless area, the WENO interpolation weights are tuned towards the designed optimal value for better accuracy. Compared with the original characteristic‐variable‐based WENO, the current implementation has similar accuracy and reduced cost. At the same time, compared with the primitive variable‐based WENO, better accuracy and convergence speed are obtained at marginal cost overhead. Several practical cases are calculated to demonstrate the accuracy and efficiency of the current methodology. Copyright © 2012 John Wiley & Sons, Ltd.
Synergistic Study on Atomic Oxygen-Induced Erosion of Polyethylene with Vacuum Ultraviolet

Ground-based experimental results on atomic oxygen-induced erosion of polyethylene with simultaneous vacuum ultraviolet (VUV) are reported. In situ mass-loss measurement was made using a quartz crystal microbalance with amass resolution of 2 ng. A laser detonation atomic oxygen beam source was used to simulate collision energy of atomic oxygen with materials in low Earth orbit. To change relative intensity of atomic oxygen and VUV, the sample was rotated with an axis perpendicular both to the axes of atomic oxygen and VUV. It was observed that the erosion rate of polyethylene was increased 30-100% by a simultaneous VUV exposure depending on the incident angle of atomic oxygen. No contribution of temperature increase was confirmed in the polyethylene erosion. The experimental results suggested that two reaction pathways exist in the simultaneous atomic oxygen and VUV exposure conditions. It is suggested that the synergistic effect on polyethylene erosion is emphasized in the exposure condition where relative atomic oxygen flux is low against VUV flux.
A Note on likelihood estimation of missing values in time series

Missing values in time series can be treated as unknown parameters and estimated by maximum likelihood, or as random variables and predicted by the expectation of the unknown values given the data. The difference between these two procedures is illustrated by an example. It is argued that the second procedure is, in general, more relevant for estimating missing values in time series.
Probiotic Properties of Chicken-Derived Highly Adherent Lactic Acid Bacteria and Inhibition of Enteropathogenic Bacteria in Caco-2 Cells

Lactic acid bacteria (LAB) as probiotic candidates have various beneficial functions, such as regulating gut microbiota, inhibiting intestinal pathogens, and improving gut immunity. The colonization of the intestine is a prerequisite for probiotic function. Therefore, it is necessary to screen the highly adherent LAB. In this study, the cell surface properties, such as hydrophobicity, auto-aggregation, co-aggregation, and adhesion abilities of the six chicken-derived LAB to Caco-2 cells were investigated. All six strains showed different hydrophobicity (21.18–95.27%), auto-aggregation (13.61–30.17%), co-aggregation with Escherichia coli ATCC 25922 (10.23–36.23%), and Salmonella enterica subsp. enterica serovar Typhimurium ATCC 13311 (11.71–39.35%), and adhesion to Caco-2 cells (8.57–26.37%). Pediococcus pentosaceus 2–5 and Lactobacillus reuteri L-3 were identified as the strains with strong adhesion abilities (26.37% and 21.57%, respectively). Moreover, these strains could survive in a gastric acid environment at pH 2, 3, and 4 for 3 h and in a bile salt environment at 0.1%, 0.2%, and 0.3% (w/v) concentration for 6 h. Furthermore, the cell-free supernatant of P. pentosaceus 2–5 and L. reuteri L-3 inhibited the growth of enteropathogenic bacteria and the strains inhibited the adhesion of these pathogens to Caco-2 cells. In this study, these results suggested that P. pentosaceus 2–5 and L. reuteri L-3, isolated from chicken intestines might be good probiotic candidates to be used as feed additives or delivery vehicles of biologically active substances.
Effect of OPG-supplemented diet on immune and stress responses and attenuation of LPS-induced damage in the liver of carp (Cyprinus carpio haematopterus)

Effects of oxidized peptidoglycan (OPG) on immune and stress responses and lipopolysaccharide (LPS)-induced damage in the liver of carp were investigated in this study. Four hundred carps (Cyprinus carpio haematopterus) were fed with five experimental diets supplemented with 0, 100, 200, 400, and 800 mg kg-1 OPG for 28 days. Each group had four replicates and 20 fish per replication. LPS challenge (injection of 40 mg kg-1 saline or LPS) occurred at day 29. The supplementation with OPG linearly increased (p<0.05) plasma total protein, immunoglobulin M (IgM), complement 4 (C4), cortisol, and lactate on day 14. Dietary supplementation with OPG linearly increased (p<0.05) plasma and complement 3 (C3); quadratically improved (p<0.05) alkaline phosphatase (ALP) and lysozyme (LYS) activities; linearly increased hepatic superoxide dismutase (SOD) and catalase (CAT) activities; increased malondialdehyde (MDA) contents; and improved (p<0.05) hepatic anti-superoxide anion (ASA) and anti-hydroxy radical (AHR) contents on days 14 and 28. Dietary OPG significantly prevented the increase of interleukin 1β (IL-1β), interleukin 6 (IL-6), and tumor necrosis factor α (TNF-α) by inhibiting the excessive activation of TLR2-Myd88 signaling pathway; downregulating TLR2, Myd88, and NF-κB p65; and upregulating nuclear factor erythroid-2-related factor 2 (Nrf2) and Keap1 mRNA expression (p<0.05). Therefore, this study indicated that dietary OPG improves the plasma immune response, regulates the hepatic antioxidant status, and attenuates LPS-induced negative effects in the carp at the optimal dose of 400 mg kg-1.
Integrated surveillance of extended-spectrum beta-lactamase (ESBL)-producing Salmonella and Escherichia coli from humans and animal species raised for human consumption in Canada from 2012 to 2017

Abstract Resistance to beta-lactam antimicrobials caused by extended-spectrum beta-lactamase (ESBL)-producing organisms is a global health concern. The objectives of this study were to (1) summarise the prevalence of potential ESBL-producing Escherichia coli (ESBL-EC) and Salmonella spp. (ESBL-SA) isolates from agrifood and human sources in Canada from 2012 to 2017, and (2) describe the distribution of ESBL genotypes among these isolates. All data were obtained from the Canadian Integrated Program for Antimicrobial Resistance Surveillance (CIPARS). CIPARS analysed samples for the presence of ESBLs through phenotypic classification and identified beta-lactamase genes (blaTEM, blaSHV, blaCTX, blaOXA, blaCMY−2) using polymerase chain reaction (PCR) and whole genome sequencing (WGS). The prevalence of PCR-confirmed ESBL-EC in agrifood samples ranged from 0.5% to 3% across the surveillance years, and was detected most frequently in samples from broiler chicken farms. The overall prevalence of PCR-confirmed ESBL-SA varied between 1% and 4% between 2012 and 2017, and was most frequently detected in clinical isolates from domestic cattle. The TEM-CMY2 gene combination was the most frequently detected genotype for both ESBL-EC and ESBL-SA. The data suggest that the prevalence of ESBL-EC and ESBL-SA in Canada was low (i.e. <5%), but ongoing surveillance is needed to detect emerging or changing trends.
Spatiotemporal Plasma-Particle Characterization of Dry Aerosols Using Nanosecond, Femtosecond, and Filament Laser-Produced Plasmas

The ability to rapidly characterize dry aerosols in air using laser-induced breakdown spectroscopy (LIBS) with femtosecond laser pulses promises advancement towards real-time atmospheric sampling and standoff capabilities. Of particular interest is the ability to apply LIBS in the context of low-particle loaded environments where discrete particle interactions must be observed within the sampling volume of the laser-produced plasma (LPP). In this study, dry nanoparticles in suspension are generated from a standard solution and sampled in air using Q-switched nanosecond (ns-) pulses, short-focus (SF) femtosecond (fs-) pulses, and filaments. Short time-gated plasma images are captured to observe spatially and temporally varying discrete plasma-particle interactions, which is shown to influence early air breakdown behavior and subsequent plasma evolution. Along with images, photo-multiplier tube (PMT) measurements are conducted where strong spatiotemporal dependencies are exhibited by the collected emission signal on particle proximity and plasma expansion behavior. Finally, conditional analysis is performed on LIBS measurements to determine associated sampling probabilities and filter out spectra with poor or absent emission peaks with an adaptive threshold algorithm. Graphical Abstract This is a visual representation of the abstract.
Vitamin D Receptor Gene Polymorphism ApaI as a Predisposing Factor for Psoriasis and Its Relation With Serum Vitamin D Levels and Psoriasis Severity

Background and Aim: Psoriasis is a chronic, relapsing and inflammatory multisystemic disease with both genetic predisposition and autoimmune pathogenic traits. Several types of vitamin D receptor (VDR) polymorphisms have been investigated as a predisposing factor for psoriasis susceptibility with controversial results. However, the exact pathophysiological effect of the VDR gene on psoriasis susceptibility remains poorly understood. We aimed to determine whether VDR gene polymorphisms, specifically rs7975232 (ApaI), afford psoriasis susceptibility in a given community in Saudi Arabia. Also, to assess its possible relation with disease severity. Subjects and Methods: In a comparative case-control study comprising 53 psoriatic patients and 41 matched healthy controls, we measured serum ApaI levels, and the PCR-RFLEP technique detected ApaI genetic polymorphism (rs7975232) for both groups. Serum vitamin D level was measured in both groups. Result: Our results revealed that A/A genotype of ApaI was significantly more predominant in patients than controls, while A/a genotype was more common in healthy subjects. Furthermore, A allele was significantly over-represented in the patients' group compared to the controls (P≤0.001). Serum vitamin D levels were significantly higher in mild psoriatic patients than in those with moderate and severe types (P=0.002). Mild psoriatic patients with a/a genotypes have higher vitamin D levels than severe patients with A/A genotypes and A/a moderate patients (P≤0.001). Conclusion: Our data indicated clearly that VDR gene polymorphism, namely ApaI, is associated with psoriasis susceptibility. Furthermore, serum vitamin D level in psoriatic patients varies among different ApaI genotypes, where it is lowest in AA genotype.
Kinesiophobia, physical performance, and health-related quality of life in patients with coronary artery disease

Introduction Kinesiophobia is an important risk factor for physical activity and exercise restrictions. It is important to assess kinesiophobia and identify high-risk patients to help prevent sedentary behaviour and increase exercise participation among cardiac patients. Aim To evaluate kinesiophobia and its association with physical performance, health-related quality of life (HRQOL), patients’ limitations and symptoms, and disease history in patients with coronary artery disease (CAD). Material and methods Fifty-two patients diagnosed with CAD were enrolled in this study. Kinesiophobia was assessed with the Tampa Scale of Kinesiophobia for Heart. The 5× Sit-to-Stand Test (5-STST), the Timed Up and Go Test (TUGT), and the 6-Minute Walk Test (6-MWT) were used to assess physical performance. Patients’ limitations and symptoms and HRQOL were evaluated with the Cardiovascular Limitations and Symptoms Profile. CAD duration and history of myocardial infarction (MI) were also recorded. Results 87.2% of the patients had high level of kinesiophobia, which was higher in patients with previous MI compared to patients without history of MI (p = 0.031). Kinesiophobia was positively correlated with 5-STST duration, TUGT duration, angina, shortness of breath, HRQOL, and CAD duration, and it was negatively correlated with 6-MWT distance (p < 0.05). According to regression analysis, only angina was a significant predictor for kinesiophobia (p = 0.014). Kinesiophobia was found to be a predictor of physical performance and HRQOL (p < 0.05). Conclusions Levels of kinesiophobia are high in patients with CAD, especially in those with a history of MI. Angina is a predictor of kinesiophobia while kinesiophobia is a predictor of both physical performance and HRQOL in CAD patients.
Spatial Ecology and Movement Patterns of Eastern Diamondback Rattlesnakes (Crotalus adamanteus) on a University Campus in Southwest Florida

Abstract. Eastern Diamondback Rattlesnakes (Crotalus adamanteus) are a species of conservation concern throughout their range. Yet, despite decades of population declines, C. adamanteus has not garnered protective status. With limited information on its general life history, more research is needed to manage C. adamanteus populations effectively, particularly at the southern extent of their distribution. To fill knowledge gaps in the ecology of C. adamanteus, we radiotracked six adult female and four male C. adamanteus from December 2015 to March 2018 (1,880 relocations) on a university campus in southwest Florida. Male snakes maintained large annual home ranges (mean = 65.7 ha 100% minimum complex polygons [MCP]) that were twice that of females (mean = 26.7 ha 100% MCP). Male snakes also made longer daily movements (mean = 39.4 ± confidence interval [CI] 34.7–44.0 m/d) than did females (mean = 16.7 ± CI 15.0–18.5 m/d), although both sexes showed variation among individuals. Snakes made considerable use of habitats adjacent to human development (<5 m from roadways and/or buildings), which consisted of more upland features than surrounding areas and may have provided thermoregulation benefits. However, snakes rarely crossed trafficked roads, which appeared to create barriers to their use of the landscape. Our research provides a better understanding of the spatial limits and dispersal patterns of C. adamanteus near the southernmost extent of its geographic range and within an urbanized landscape, which may assist in the implementation of effective management strategies.
Systematic Review of Human and Animal Evidence on the Role of Buckwheat Consumption on Gastrointestinal Health

Background: Buckwheat is a commonly cultivated crop with growing evidence that it is beneficial to gastrointestinal (GI) health. This systematic review summarizes the role of buckwheat in modifying GI health outcomes and microbiomes. Methods: Four medical databases and Google Scholar were systematically searched. Clinical trials, observational studies, animal in vivo, and in vitro studies with human and animal GI-derived samples were included. Results: There were 32 studies (one randomized controlled trial [RCT], one non-randomized trial, 3 observational, 9 in vitro, and 18 animal in vivo studies) included. In preclinical studies, buckwheat extracts were observed to have cytotoxic potential against human-derived GI cancer cell lines. Animals fed with buckwheat had lower GI mucosal inflammation, higher alpha diversity in the GI microbiome, and higher levels of fecal short-chain fatty acids. Human evidence studies and clinical trials were limited and predominantly of moderate risk of bias. The majority of in vitro studies with GI-derived samples and in vivo studies were reliable without restrictions in study design. Conclusion: In vivo and in vitro studies show that buckwheat may have potential GI benefits due to its anti-oxidant and anti-inflammatory potential; however, human evidence remains limited, and its impact on health in humans remains to be elucidated in future trials.
Examining the effect of board size on credit risk of universal banks in Ghana

Abstract This study examines the effect of board size on credit risk with bank ownership, bank size and bank age acting as controls for the first time in the Ghanaian Banking Sector. Using Quantile Regression modelling, data was obtained from 12 universal Banks in Ghana over the period from 2011 to 2018 for the study. Agency theory was used since conflicts that exist between managers and shareholders need to be mitigated via the use of suitable corporate governance mechanism in the form of board size. The findings revealed that a universal bank with a small board size is not likely to reduce credit risk. Thus, the study established the importance of having large boards which are independent of management of universal banks in Ghana: large boards may enhance credit assessment and monitoring thereby reducing credit risk. The study used only quantitative techniques; however, using qualitative method in addition to the quantitative approach might enhance the understanding of the effect of board size on credit risk of universal banks in Ghana. Besides, the study relied on secondary data, though it is empirically established that there are biases inherent in such data.