Miracle-dz/UniFAR-FTUs huggingface dataset:
Transition prediction and control in subsonic flow over a hump

The influence of a surface roughness element in the form of a two‐dimensional hump on the transition location in a two‐dimensional subsonic flow with a free‐stream Mach number up to 0.8 is evaluated. Linear stability theory, coupled with the eN transition criterion, is used in the evaluation. The mean flow over the hump is calculated by solving the interacting boundary‐layer equations; the viscous–inviscid coupling is taken into consideration, and the flow is solved within the separation bubble. The effects of hump height, length, location, and shape; unit Reynolds number; free‐stream Mach number; continuous suction level; location of a suction strip; continuous cooling level; and location of a heating strip on the transition location are evaluated. The N‐factor criterion predictions agree well with the experimental correlation of Fage (A. Fage, Br. Aero. Res. Council Report No. 2120, 1943); in addition, the N‐factor criterion is more general and powerful than experimental correlations. The theoretically .
Stressors and Impact of the COVID-19 Pandemic on Vulnerable Hispanic Caregivers and Children

Psychological sequelae are important elements of the burden of disease among caregivers. Recognition of the impact of adversity and stress biomarkers is important to prevent mental health problems that affect rearing practices and child well-being. This cross-sectional study explored social determinants of health (SDoH)-mediated stressors during COVID-19 and risks for mental health problems among caregivers of children with prenatal Zika virus exposure. Twenty-five Hispanic caregivers completed surveys assessing SDoH vulnerabilities, COVID-exposures and impact, post-traumatic stress disorder (PTSD) symptomatology, and provided a hair sample for cortisol concentration (HCC). Most caregivers had low education, household income < $15,000/year, and were unemployed. Stressors included disrupted child education and specialized services, and food insecurity. While most reported PTSD symptomatology, multivariate linear regression models adjusted for the caregiver’s age, education, and the child’s sex, revealed that caregivers with high symptomatology had significantly lower HCC than those with low symptomatology and those with food insecurity had significantly higher HCC than participants without food insecurity. The impact of COVID-19 on daily life was characterized on average between worse and better, suggesting variability in susceptibility and coping mechanisms, with the most resilient identifying community support and spirituality resources. SDoH-mediators provide opportunities to prevent adverse mental health outcomes for caregivers and their children.
Antiseptic-Loaded Casein Hydrogels for Wound Dressings

Chronic wound treatment accounts for a substantial percentage of the medical expenses worldwide. Improving and developing novel wound care systems can potentially help to handle this problem. Wound dressings loaded with antiseptics may be an important tool for wound care, as they inhibit bacterial growth at the wound site. The goal of the present work was to investigate the potential of using casein hydrogel dressings loaded with two antiseptic drugs, Octiset® or polyhexanide, to treat chronic wounds. Casein-based hydrogels are inexpensive and have several properties that make them suitable for biomedical applications. Two types of casein were used: casein sodium salt and acid casein, with the formulations being labelled CS and C, respectively. The hydrogels were characterised with respect to their physical properties (swelling capacity, water content, morphology, mechanical resistance, and stability), before and after sterilisation, and they showed adequate values for the intended application. The hydrogels of both formulations were able to sustain controlled drug-release for, at least, 48 h. They were demonstrated to be non-irritant, highly haemocompatible, and non-cytotoxic, and revealed good antimicrobial properties against Staphylococcus aureus and Pseudomonas aeruginosa. Steam-heat sterilisation did not compromise the material’s properties. The in vivo performance of C hydrogel loaded with Octiset® was evaluated in a case study with a dog. The efficient recovery of the wounds confirms its potential as an alternative for wound treatment. To our knowledge, this is the first time that wound dressings loaded with Octiset®, one of the most efficient drugs for wound treatment, were prepared and tested.
Enhancing strength properties of recycled paper with TEMPO-oxidized nanocellulose

Recycled fibers used in the manufacturing of paper and board are associated with strength deficiencies. This study investigated the use of TEMPO-oxidized nanocellulose from oil palm empty fruit bunch (OPEFB-TEMPO) for reinforcing papers made from such fibers. Strength properties of tensile and tear were enhanced with the addition of OPEFB-TEMPO, with strong correlations, as indicated by the R2 values. The reinforcement capability was supported by the scattering coefficient-percent relationship. The only drawback of the nanocellulose addition is that it reduces pulp drainability, which can be minimized by adding drainage aids. Because only a relatively small amount is required, OPEFB-TEMPO has the potential to be used as paper strengthening agent, particularly in the production of low grammage papers.
Limited-area fourier spectral models and data analysis schemes : Windows, fourier extension, davies relaxation, and all that

Abstract Regional spectral models have previously periodized and blended limited-area data through ad hoc low-order schemes justified by intuition and empiricism. By using infinitely differentiable “window functions” or “bells” borrowed from wavelet theory, one can periodize with preservation of spectral accuracy. Similarly, it is shown through a mixture of theory and numerical examples that Davies relaxation for blending limited-area and global data in one-way nested forecasting can be performed using the same C∞ bells as employed for the Fourier blending. “The relative success of empirical methods . may be used as partial justification to allow us to make the daring approximation that the data on a limited area domain may be decomposed into a trend and a periodic perturbation, and to proceed with Fourier transformation of the latter. ” Laprise (2003, p. 775)
Diagnosis of Legionnaires’ Disease Assisted by Next-Generation Sequencing in a Patient with COVID-19

Abstract Coinfection in COVID-19 patients is associated with worsening outcome. Among patients with COVID-19, Legionella pneumophila, a common cause of pneumonia, has been reported as a co-occurring respiratory infection. A nonspecific clinical presentation, however, makes an early diagnosis difficult. Bronchoalveolar lavage fluid was collected from a patient suffering from COVID-19 and presenting with pneumonia and sent for metagenomic analysis. Differential abundance analysis was carried out by comparing each taxon reads per million between the bronchoalveolar lavage fluid sample and the negative control. Two replicates of metagenomic sequencing were conducted on bronchoalveolar lavage fluid samples. Within each replicated sequencing, one negative control was sequenced for comparison of taxon abundance in the BALF sample. In both replicates, Legionella pneumophila was the only taxon with significantly higher abundance when compared with the negative control. PCR of the bronchoalveolar further confirmed the presence of L. pneumophila. Several studies have estimated that the incidence of Legionnaires’ disease co-infection in patients with COVID-19 infection is approximately 0% to 1.5%. There are some common characteristics of COVID-19 and co-infection with Legionnaires’ disease, making it difficult to diagnose bacterial infection early. The diagnosis of these cases is important due to the different treatments used. Current diagnostic tests for Legionnaires’ disease include conventional culture, urinary antigen for L. pneumophila serogroup 1, polymerase chain reaction, direct fluorescent antibody stain, and paired serology. The current study demonstrated that metagenomics is a promising approach that facilitated the diagnosis of Legionnaires’ disease.
Structure and Function Analysis of Cultivated Meconopsis integrifolia Soil Microbial Community Based on High-Throughput Sequencing and Culturability

Simple Summary The composition, function, and interactions of the soil microbial community of cultivated Meconopsis integrifolia are characterized by high-throughput sequencing technology and culturing methods. Soil bacteria are mainly involved in nutrient cycling, and mycorrhizal fungi form symbioses with plants. Both bacteria and fungi adopt a more synergistic and cooperative-oriented strategy to promote overall metabolic efficiency toward maintaining survival in extreme habitats and at the expense of reduced ecological stability. The results of this study offer great guidance for the conservation of endangered wild resources of Meconopsis integrifolia and the exploitation of its medicinal value. Abstract (1) Background: The structure, function, and community interactions of soil microbial communities of cultivated Meconopsis integrifolia were characterized by studying this alpine flower and traditional endangered Tibetan medicine. (2) Methods: Soil bacteria and fungi were studied based on high-throughput sequencing technology. Bacteria were isolated using culturomics and functionally identified as IAA-producing, organic phosphorus-dissolving, inorganic phosphorus-dissolving, and iron-producing carriers. (3) Results: The dominant bacterial phyla were found to be Proteobacteria and Acidobacteria, and unclassified_Rhizobiales was the most abundant genus. Ascomycota and Mortierellomycota were the dominant fungal phyla. The bacteria were mainly carbon and nitrogen metabolizers, and the fungi were predominantly Saprotroph—Symbiotroph. The identified network was completely dominated by positive correlations, but the fungi were more complex than the bacteria, and the bacterial keystones were unclassified_Caulobacteraceae and Pedobacter. Most of the keystones of fungi belonged to the phyla Ascomycetes and Basidiomycota. The highest number of different species of culturable bacteria belonged to the genus Streptomyces, with three strains producing IAA, 12 strains solubilizing organic phosphorus, one strain solubilizing inorganic phosphorus, and nine strains producing iron carriers. (4) Conclusions: At the cost of reduced ecological stability, microbial communities increase cooperation toward promoting overall metabolic efficiency and enabling their survival in the extreme environment of the Tibetan Plateau. These pioneering results have value for the protection of endangered Meconopsis integrifolia under global warming and the sustainable utilization of its medicinal value.
Families of Multivariate Distributions

Abstract For many years there has been an interest in families of bivariate distributions with marginals as parameters. Genest and MacKay (1986a,b) showed that several such families that appear in the literature can be derived by a unified method. A similar conclusion is obtained in this article through the use of mixture models. These models might be regarded as multivariate proportional hazards models with random constants of proportionality. The mixture models are useful for two purposes. First, they make some properties of the derived distributions more transparent; the positive-dependency property of association is sometimes exposed, and a method for simulation of data from the distributions is suggested. But the mixture models also allow derivation of several new families of bivariate distributions with marginals as parameters, and they indicate obvious multivariate extensions. Some of the new families of bivariate distributions given in this article extend known distributions by adding a parameter .
On a vectorial riemann boundary value problem with infinite defect numbers, and related factorization of matrix-valued functions

The author presents a method for the factorization of a matrix-valued function, specified on a closed contour , in which functions meromorphic inside and outside of (with, generally speaking, an infinite number of zeros and poles), and products of such functions, are allowed as the diagonal elements of the central factor. The concept of partial indices of such a factorization is introduced, and their invariance is established. Conditions for solvability are obtained, as well as the general form of the solution, and criteria for the closure of the image of a vectorial Riemann boundary value problem whose matrix coefficient is factored in the sense indicated.Bibliography: 33 titles.
Continuous Overcast Daylight Autonomy (DAo.con): A New Dynamic Metric for Sensor-Less Lighting Smart Controls

ABSTRACT Daylight dynamic metrics are useful tools for quantifying the switch-on time or the dimming of electric lighting according to the architectural scenario. A variant of these metrics can also be used to define strategies to control the lighting fixtures, dimming the luminous flux with no need for external input and reducing therefore the energy consumption of the lighting systems. Given this context, a new approach is proposed, Continuous Overcast Daylight Autonomy (DAo.con), defined as the percentage of occupied time when an illuminance threshold is met by daylight alone under continuous overcast sky conditions, considering a partial credit linearly to values below the threshold defined. This concept acts as an algorithm which adjusts the luminous flux of the luminaires according to the Daylight Factors measured or simulated, considering user requirements and ignoring any internal device for actively measuring the lighting conditions. The Daylight Factors can be modified according to the use of shading devices that affect to the indoor natural light. Accordingly, this algorithm can significantly reduce the embodied cost of the lighting smart controls, promoting their spread and its implementation in building refurbishment, while the energy consumption in electric lighting is reduced by up to 76% for large windows and by up to 65% for medium-sized openings. The results show that the use of this algorithm in office environments with LED fixtures can promote energy savings of up to 7.8 W/m2 for locations with predominantly clear skies and up to 5.7 W/m2 for northern latitudes with mainly overcast skies.
A New Criterion for Controlling the Number of Limit Cycles of Some Generalized Liénard Equations

Abstract We consider a class of planar differential equations which include the Lienard differential equations. By applying the Bendixson–Dulac Criterion for l -connected sets we reduce the study of the number of limit cycles for such equations to the condition that a certain function of just one variable does not change sign. As an application, this method is used to give a sharp upper bound for the number of limit cycles of some Lienard differential equations. In particular, we present a polynomial Lienard system with exactly three limit cycles.
Compression of self-frequency shift in ultrashort soliton propagation by super-Gaussian filters

We show, theoretically, that the combination of super-Gaussian filters and nonlinear gains can greatly control the self-frequency shift in ultrashort optical pulse. Typical examples are given for stabilizing the propagation of ultrashort optical pulse over a long distance. In particular, by comparing to the Gaussian filters, super-Gaussian filter is more effective in overcoming self-frequency shift in the presence of nonlinear gains.
Electronic speckle pattern interferometry applied to the displacement measurement of sandwich plates with double fully potted inserts

The construction of electronic speckle pattern interferometer (ESPI) applied to sandwich plates with double inserts has been presented in this paper. Proposed ESPI has advantages of full-field and non-destructive testing that can measures microscopic out-of-plane displacement in the elastic region and without wasting specimen. For validation purpose, the finite element method (FEM) analysis was conducted. By comparing the results of ESPI and FEM displacement at the center of the specimen that a convincing agreement is revealed, thus showing the effect of spatial interval of the double inserts on the displacement of sandwich plates under loading.
Automated retrieval and comparison of sheet metal parts

ABSTRACT With the number of 3D CAD models increasing rapidly, retrieving models of similar parts has become an important activity as existing designs may contain vital information regarding design and manufacturing. This paper is targeted at retrieving and comparing sheet metal parts. In the method proposed herein, the general shape of a sheet metal part is represented by a simplified hierarchical tree wherein the nodes represent the planar walls of the part and feature-related information is attached to these nodes as textual attributes. A shape index is derived from this simplified tree and subsequently used to retrieve similar parts from the database. The retrieved parts are assessed for their similarity with the enquiry part using five criteria: the general shape of the part, bends and their direction, feature types, feature location and feature size. In addition to determining the degree of similarity, the main advantage of the proposed method is that the assessment provides useful feedback to design and manufacturing engineers based on these five criteria. A prototype system developed in C++ has been tested on a database containing a few hundred parts and the effectiveness of the proposed method in retrieving and comparing the parts is discussed.
How To Align An Off-Axis Parabolic Mirror

The alignment of an off-axis parabolic mirror can be discussed mathematically in terms of third order optics using Zernike polynomials. While this discussion can add insight to the theory of alignment, it doesn't provide an easy means of knowing what to do in a "Hands-On" laboratory situation. As can be inferred from the title of this paper, a "How-To" method of alignment will be discussed. As for the theory of alignment, let it suffice to say that it can be shown that an off-axis parabola is a surface which departs from a best fit sphere in terms of spherical aberration, coma, and astigmatism.
LIE GROUP INTEGRATORS FOR THE NUMERICAL SOLUTION OF DAE'S IN FLEXIBLE MULTIBODY DYNAMICS

The absolute coordinate method is widely used for the integrated modeling of complex flexible multibody systems including rigid bodies, nonlinear force elements as well as flexible components. In the approach proposed in (2,5), each large rotation variable is represented by three rotation parameters, which are used for the formulation of the equations of motion. This paper considers as alternative an adaptation of Lie group time integrators (4, 7, 8) in order to provide a more natural answer to the rotation parameterization problem. Lie group time integrators do not require a priori the definition of local generalized coordinates, in other words, it includes in its algorithmic structure an intrinsic and consistent strategy for the parameterization of the configuration manifold. The motion of a flexible multibody system is described using nodal translation and rotation variables so that the system evolves on the Lie group defined by a multiple cartesian product of R 3 and SO(3). The interconnections between the various bodies of the multibody system are modeled using nonlinear algebraic constraints. As a consequence, the motion of the system is restricted to a submanifold of the Lie group. In other words, the equations of motion have the structure of a differential-algebraic equation on a Lie group (DAE on a Lie
Correlative Multi-Modal Microscopy: A Novel Pipeline for Optimizing Fluorescence Microscopy Resolutions in Biological Applications

The modern fluorescence microscope is the convergence point of technologies with different performances in terms of statistical sampling, number of simultaneously analyzed signals, and spatial resolution. However, the best results are usually obtained by maximizing only one of these parameters and finding a compromise for the others, a limitation that can become particularly significant when applied to cell biology and that can reduce the spreading of novel optical microscopy tools among research laboratories. Super resolution microscopy and, in particular, molecular localization-based approaches provide a spatial resolution and a molecular localization precision able to explore the scale of macromolecular complexes in situ. However, its use is limited to restricted regions, and consequently few cells, and frequently no more than one or two parameters. Correlative microscopy, obtained by the fusion of different optical technologies, can consequently surpass this barrier by merging results from different spatial scales. We discuss here the use of an acquisition and analysis correlative microscopy pipeline to obtain high statistical sampling, high content, and maximum spatial resolution by combining widefield, confocal, and molecular localization microscopy.
Barriers and Enablers for the Use of Digital Interactive Television in Nursing Home Settings: An Interview Case Study with Older Adults and Professionals

Increasingly, public health programs are recommending the use of information and communication technologies to address the psychosocial needs of Older Adults (OAs). Recently, several applications that allow access to communication and stimulation functionalities using digital interactive television (DiTV) have been developed. The use of the television interface to access digital services seems to help meet several accessibility and usability needs of OAs. However, its use entails other challenges related to different dimensions (organizational, technological, ethical, etc.). This study aims to identify the factors that enable or hinder the use of DiTV by OAs living in geriatric institutions. A qualitative interview case study was conducted in three French geriatric facilities. A total of 25 semi-structured interviews were carried out with residents and care professionals, between February and April 2022, to identify enablers and barriers to DiTV use. Data were processed using a thematic deductive analysis inspired by a multidimensional Health Technology Assessment model. The analysis showed that DiTV use may be limited by organizational (e.g., workload), technological (e.g., ergonomic issues), human (e.g., health issues), ethical (e.g., privacy), and safety factors (e.g., frustration due to technical problems). A summary of these factors and five recommendations for DiTV implementation in geriatric settings are presented in this paper.
Investigation of the Functional Ageing of Conductive Coated Fabrics under Simulated Washing Conditions

Conductive textiles play an important role in recent electronics development; however, one of the major challenges remains their machine-washing durability. For the investigation of the basic wash ageing mechanisms, we used copper-plated polyamide 66 and cellulose fabrics and developed a wet and dry operable flex tester with online resistance recording. The evaluation was supported by abrasion tests, cyclic elongation tests and tribological investigation of dry and wet textile–textile friction. It was found that the contribution of mechanical and chemical ageing to wash ageing strongly depends on the substrate material. A bad adhesion of copper on polyamide 66 leads to early fatigue while better stability of the copper on cellulose leads to a stronger resistance against ageing. For both substrates, the delamination of the copper layer was the root cause of the fatigue, which is facilitated by the washing solution. Finally, a cumulative fatigue model was developed and the determination of the end of lifetime by the intended use is discussed.