Miracle-dz/UniFAR-FTUs huggingface dataset:
D-dimer level and lymphocyte to white blood cell count ratio could be a predictor of mechanical ventilation therapy in patients with coronavirus disease 2019

Some symptomatic patients with coronavirus disease 2019 (COVID-19) develop acute respiratory failure with mechanical ventilation support. Therefore, identifying patients who tend to experience respiratory deterioration is of great importance. We investigated blood markers upon hospital admission that could predict respiratory illness in patients with COVID-19. This retrospective observational study included 148 patients with COVID-19 admitted to our hospital. All blood marker levels of C-reactive protein (CRP), lactate dehydrogenase (LDH), D-dimer, white blood cells (WBCs), and lymphocytes were measured on admission in 148 patients. Patients were divided into the severe group (SVG), requiring mechanical ventilation therapy, and the non-severe group (nSVG). The levels of CRP, LDH, D-dimer and WBC count were significantly higher, and the lymphocyte count and lymphocyte-to-WBC count ratio (LWR) were significantly lower in the SVG than in the nSVG. The area under the receiver operating characteristic curve for CRP, LDH, D-dimer and LWR showed high values of 0.69, 0.70, 0.70, and 0.74, respectively. The age-adjusted odds ratios of D-dimer and LWR were high (5.5 [1.9–15.9] and 5.6 [2.2–14.3], respectively). D-dimer level and LWR upon admission were highly predictive of mechanical ventilation support in patients with COVID-19. © Japanese Society of Biorheology 2022.
A correction to an example in "Dp-minimality: basic facts and examples"

This note contains a new, corrected proof of the dp-minimality of an example previously published by the same authors in "Dp-minimality: basic facts and examples. " The example is of an ordered divisible abelian group which is dp-minimal and contains a unary predicate defining an open subset with infinitely many connected components.
Two-Dimensional Models of Cultural Differences: Statistical and Theoretical Analysis

This study finds a common statistical pattern in all major quantitative studies of cultural differences, and discusses theories that explain this pattern. 92 cultural variables from 33 published cross-cultural studies including 125 countries are analyzed with an advanced factor analysis method. The study confirms previous findings that two factors can account for a large part of the variation in all major published cultural variables. While many previously published cultural variables represent arbitrarily rotated factor analysis results, the present study is improving the explanatory power by un-rotating the factors and by incorporating new theories that link cultural values to conditions in the physical and social environment. The first factor, accounting for 34% of the total variance, reflects general effects of development and welfare. This factor is explained by theories of development, modernization, emancipation, and secularization. This includes psychological effects of collective security that are explained by evolutionary psychology. The dimension formed by the first factor has one end in poor and war-torn countries, and the opposite end in North European welfare states. The second factor, accounting for 15% of the total variance, reflects relational mobility, long-term versus short-term orientation, differences in self-construal, and various other effects. Theoretical explanations of these effects are based on differences in subsistence economy, colonial history, ethnic diversity, and religion. The second factor has one end in East Asian countries, and the opposite end in Latin American countries. Analysis of business culture reveals the same two-factor pattern as national culture.
Sustainable Soilless Cultivation Mode: Cultivation Study on Droplet Settlement of Plant Roots under Ultrasonic Aeroponic Cultivation

In order to solve the effects of environmental factors on the droplet settlement of a nutrient solution on plant roots when planting plants with ultrasonic aeroponic cultivation, this study aimed to obtain a suitable wind speed range and atomization time through a nutrient solution atomization experiment, to obtain the best control scheme through a multi-environmental parameter combination cultivation experiment. Taking an ultrasonic aeroponic cultivation device as the research object, and lettuce as the test material, experiments were carried out on two factors affecting the wind speed of an axial fan and the atomization time of the nutrient amount of ultrasonic aeroponic cultivation plants; the suitable wind speed range was 1.0–2.5 m/s. The temperatures of the lettuce root zones in the upper, middle, and lower layers of the ultrasonic aeroponic cultivation device at different time periods were obtained by atomizing the nutrient solution. When the optimum temperature for the root growth of lettuce was 15–20 °C and the wind speed was 1.0–2.5 m/s, the continuous atomization time of the nutrient solution was 66–184 min. Using a quadratic orthogonal rotation combination design method, three main factors, namely wind speed, ambient temperature, and atomization time, were selected to test droplet settlement in the lettuce roots. The droplet settlement in the lettuce root system was measured. The droplet settlement regression equation in the lettuce root system was established. The reliability of the regression model was tested according to the significance condition, and a simplified quadratic orthogonal regression equation was obtained. The main effect analysis, single factor analysis, and interaction effect analysis were used to analyze the model, and the model was further verified. The verification results showed that the relative error between the predicted value and the actual value of the average root droplet sedimentation was 5.8%. The optimum wind speed was 2.5 m/s, the ambient temperature was 16 °C, and the atomization time was 184 min when the ultrasonic aeroponic cultivation device designed in this study was used to cultivate lettuce. It could provide a theoretical reference and an experimental basis for the control of the related growth environment parameters of plants cultivated using ultrasonic aeroponic cultivation.
A search for accreting young companions embedded in circumstellar disks

Context. In recent years, our understanding of giant planet formation progressed substantially. There have even been detections of a few young protoplanet candidates still embedded in the circumstellar disks of their host stars. The exact physics that describes the accretion of material from the circumstellar disk onto the suspected circumplanetary disk and eventually onto the young, forming planet is still an open question. Aims. We seek to detect and quantify observables related to accretion processes occurring locally in circumstellar disks, which could be attributed to young forming planets. We focus on objects known to host protoplanet candidates and/or disk structures thought to be the result of interactions with planets. Methods. We analyzed observations of six young stars (age 3.5–10 Myr) and their surrounding environments with the SPHERE/ZIMPOL instrument on the Very Large Telescope (VLT) in the Hα filter (656 nm) and a nearby continuum filter (644.9 nm). We applied several point spread function (PSF) subtraction techniques to reach the highest possible contrast near the primary star, specifically investigating regions where forming companions were claimed or have been suggested based on observed disk morphology. Results. We redetect the known accreting M-star companion HD142527 B with the highest published signal to noise to date in both Hα and the continuum. We derive new astrometry (r=62.8−2.7+2.1 mas and PA=(98.7±1.8)°) and photometry (ΔN_Ha = 6.3−0.3+0.2 mag, ΔB_Ha = 6.7 ± 0.2 mag and ΔCnt_Ha = 7.3−0.2+0.3 mag) for the companion in agreement with previous studies, and estimate its mass accretion rate (Ṁ ≈ 1−2 × 10−10 M⊙yr−1). A faint point-like source around HD135344 B (SAO206462) is also investigated, but a second deeper observation is required to reveal its nature. No other companions are detected. In the framework of our assumptions we estimate detection limits at the locations of companion candidates around HD100546, HD169142, and MWC 758 and calculate that processes involving Hα fluxes larger than ~ 8 × 10−14–10−15 erg s−1 cm−2 (Ṁ > 10−10−10−12 M⊙yr−1) can be excluded. Furthermore, flux upper limits of ~10−14−10−15 erg s−1 cm−2 (Ṁ < 10−11–10−12 M⊙yr−1) are estimated within the gaps identified in the disks surrounding HD135344 B and TW Hya. The derived luminosity limits exclude Hα signatures at levels similar to those previously detected for the accreting planet candidate LkCa15 b.
Website Aesthetics and Technology Playfulness in Encouraging Customer Use of Online based Self-Service Technologies: Special Reference to Commercial Banks in Sri Lanka

Rapid technological advancements have aided the service sector's continued evolution, converting traditional physical service encounters managed by service professionals into self-service technologies (SSTs) controlled by customers. Despite the fact that prior studies have attempted to understand customers' technology acceptance in general, sufficient attention has not been paid to the study of self-service technologies, particularly Online based SSTs. Hence, the purpose of this study is to investigate the website aesthetics and technology playfulness of online-based SSTs leading the use of self-service technologies in the Sri Lankan commercial banking industry. A qualitative approach was undertaken, conducting 50 semi-structured interviews with banking customers who use SSTs in the Western Province, Sri Lanka with the use of a non-probabilistic purposeful sampling strategy. The method of thematic analysis was used to analyze the data. The findings revealed “Information quality and guidance”, “Innovative systems and facilities”, “Use of multiple languages”, “High interactivity” and “Visually appealing techniques” as the five themes of website aesthetics and “Enjoyment”, “Exciting”, “Entertaining”, “Creativity”, “Delight” and “Appealing features” as the six themes of technology playfulness leading towards the use of online-based SSTs in the banking sector. The findings would occupy the vacuum of existing literature on the customer use of online-based self-service technologies. Practitioners will be given direction with the understanding on how consumers could be encouraged towards the use of online-based SSTs with the integration of website aesthetics and technology playfulness to improve the delivery of self-service technologies in the commercial banking sector.
Distribution asymptotique du nombre de diviseurs premiers distincts inférieurs ou égaux à m

Le sujet principal de ce memoire est l'etude de la distribution asymptotique de la fonction f_m qui compte le nombre de diviseurs premiers distincts parmi les nombres premiers $p_1,. ,p_m$. Au premier chapitre, nous presentons les sept resultats qui seront demontres au chapitre 4. Parmi ceux-ci figurent l'analogue du theoreme d'Erdos-Kac et un resultat sur les grandes deviations. Au second chapitre, nous definissons les espaces de probabilites qui serviront a calculer les probabilites asymptotiques des evenements consideres, et eventuellement a calculer les densites qui leur correspondent. Le troisieme chapitre est la partie centrale du memoire. On y definit la promenade aleatoire qui, une fois normalisee, convergera vers le mouvement brownien. De la, decouleront les resultats qui formeront la base des demonstrations de ceux chapitre 1.
First second of leptons

A poorly constrained parameter in the Standard Model of Cosmology is the lepton asymmetry . Each flavour asymmetry lf with f = e, μ, τ is the sum of the net particle density of the charged leptons nf heir corresponding neutrinos, normalized with the entropy density s. Constraints on If from BBN and CMB allow for lepton flavour asymmetries orders of magnitudes larger than the baryon asymmetry b ≃ 10−10. In this article we show how large lepton (flavour) asymmetries lf ≤ 𝒪(0.1) influence the early universe, in particular the freeze out of WIMPs and the cosmic QCD transition.
A novel battery cooling system using nanofluids on MATLAB Simulink

The battery pack is one of the crucial components in the creation of an electric car. Thus, its optimal and efficient functioning is of prime importance. Several issues are generated due to battery heating which may be fatal and can cause severe issues. The battery cooling system is one of the most effective ways to keep the battery pack at the ideal temperature for lithium‐ion cells to function properly. This article mainly focuses on MATLAB Simulink simulation‐based novel battery cooling system design using Nanofluids. In this simulation study, the employed nanofluids are compared mostly to ethylene glycol. The simulation findings demonstrated that employing nanofluid as the coolant cools the battery pack more quickly than using ethylene glycol. It was found that ethylene glycol can cool the battery pack within 480 seconds while with the use of nanofluids the battery pack was cooled in just 150 seconds considering the temperature cooling from 40°C to 25°C. The effective and fast cooling of Nanofluids is due to the higher value of thermal conductivity of the fluid which plays a major role in heat transfer. Thus, fluid properties mainly thermal conductivity must be focused upon and % concentration of nanoparticles in the base fluid must be increased to get more effective cooling.
Near-UV OH Prompt Emission in the Innermost Coma of 103P/Hartley 2

The Deep Impact spacecraft flyby of comet 103P/Hartley 2 occurred on 2010 November 4, 1 week after perihelion with a closest approach (CA) distance of about 700 km. We used narrowband images obtained by the Medium Resolution Imager on board the spacecraft to study the gas and dust in the innermost coma. We derived an overall dust reddening of 15%/100 nm between 345 and 749 nm and identified a blue enhancement in the dust coma in the sunward direction within 5 km from the nucleus, which we interpret as a localized enrichment in water ice. OH column density maps show an anti-sunward enhancement throughout the encounter, except for the highest-resolution images, acquired at CA, where a radial jet becomes visible in the innermost coma, extending up to 12 km from the nucleus. The OH distribution in the inner coma is very different from that expected for a fragment species. Instead, it correlates well with the water vapor map derived by the HRI-IR instrument on board Deep Impact. Radial profiles of the OH column density and derived water production rates show an excess of OH emission during CA that cannot be explained with pure fluorescence. We attribute this excess to a prompt emission process where photodissociation of H2O directly produces excited OH*(A2Σ+) radicals. Our observations provide the first direct imaging of near-UV prompt emission of OH. We therefore suggest the use of a dedicated filter centered at 318.8 nm to directly trace the water in the coma of comets.
Nonequilibrium dynamics of spin glasses: Examination of the ghost domain scenario

Extensive experimental and numerical studies of the non-equilibrium dynamics of spin glasses subjected to temperature or bond perturbations have been performed to investigate chaos and memory effects in selected spin glass systems. Temperature shift and cycling experiments were performed on the strongly anisotropic Ising-like system {\ising} and the weakly anisotropic Heisenberg-like system {\AgMn}, while bond shift and cycling simulations were carried out on a 4 dimensional Ising Edwards-Anderson spin glass. These spin glass systems display qualitatively the same characteristic features and the observed memory phenomena are found to be consistent with predictions from the ghost domain scenario of the droplet scaling model.
Blood Pressure Measurement: From Cuff-Based to Contactless Monitoring

Blood pressure (BP) determines whether a person has hypertension and offers implications as to whether he or she could be affected by cardiovascular disease. Cuff-based sphygmomanometers have traditionally provided both accuracy and reliability, but they require bulky equipment and relevant skills to obtain precise measurements. BP measurement from photoplethysmography (PPG) signals has become a promising alternative for convenient and unobtrusive BP monitoring. Moreover, the recent developments in remote photoplethysmography (rPPG) algorithms have enabled new innovations for contactless BP measurement. This paper illustrates the evolution of BP measurement techniques from the biophysical theory, through the development of contact-based BP measurement from PPG signals, and to the modern innovations of contactless BP measurement from rPPG signals. We consolidate knowledge from a diverse background of academic research to highlight the importance of multi-feature analysis for improving measurement accuracy. We conclude with the ongoing challenges, opportunities, and possible future directions in this emerging field of research.
Processus de Lévy en finance : problèmes inverses et modélisation de dépendance

This thesis deals with the modelling of stock prices by the exponentials of Levy processes. In the first part we develop a non-parametric method allowing to calibrate exponential Levy models, that is, to reconstruct such models from the prices of market-quoted options. We study the stability and convergence properties of this calibration method, describe its numerical implementation and give examples of its use. Our approach is first to reformulate the calibration problem as that of finding a risk-neutral exponential Levy model that reproduces the option prices with the best possible precision and has the smallest relative entropy with respect to a given prior process, and then to solve this problem via the regularization methodology, used in the theory of ill-posed inverse problems. Applying this calibration method to the empirical data sets of index options allows us to study some properties of Levy measures, implied by market prices. The second part of this thesis proposes a method allowing to characterize the dependence structures among the components of a multidimensional Levy process and to construct multidimensional exponential Levy models. This is done by introducing the notion of Levy copula, which can be seen as an analog for Levy processes of the notion of copula, used in statistics to model dependence between real-valued random variables. We give examples of parametric families of Levy copulas and develop a method for simulating multidimensional Levy processes with dependence given by a Levy copula.
Multiregional Radiomic Signatures Based on Functional Parametric Maps from DCE-MRI for Preoperative Identification of Estrogen Receptor and Progesterone Receptor Status in Breast Cancer

Radiomics based on dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) has been used for breast estrogen receptor (ER) and progesterone receptor (PR) status evaluation. However, the radiomic features of peritumoral regions were not thoroughly analyzed. This study aimed to establish and validate the multiregional radiomic signatures (RSs) for the preoperative identification of the ER and PR status in breast cancer. A total of 443 patients with breast cancer were divided into training (n = 356) and validation (n = 87) sets. Radiomic features were extracted from intra- and peritumoral regions on six functional parametric maps from DCE-MRI. A two-sample t-test, least absolute shrinkage and selection operator regression, and stepwise were used for feature selections. Three RSs for predicting the ER and PR status were constructed using a logistic regression model based on selected intratumoral, peritumoral, and combined intra- and peritumoral radiomic features. The area under the receiver operator characteristic curve (AUC) was used to assess the discriminative performance of three RSs. The AUCs of intra- and peritumoral RSs for identifying the ER status were 0.828/0.791 and 0.755/0.733 in the training and validation sets, respectively. For predicting the PR status, intra- and peritumoral RSs resulted in AUCs of 0.816/0.749 and 0.806/0.708 in the training and validation sets, respectively. Multiregional RSs achieved the best AUCs among three RSs for evaluating the ER (0.851 and 0.833) and PR (0.848 and 0.763) status. In conclusion, multiregional RSs based on functional parametric maps from DCE-MRI showed promising results for preoperatively evaluating the ER and PR status in breast cancer patients. Further studies using a larger cohort from multiple centers are necessary to confirm the reliability of the established models before clinical application.
Ionized Gas Outflows in Infrared-bright Dust-obscured Galaxies Selected with WISE and SDSS

We present the ionized gas properties of infrared (IR)-bright dust-obscured galaxies (DOGs) that show an extreme optical/IR color, , selected with the Sloan Digital Sky Survey (SDSS) and Wide-field Infrared Survey Explorer (WISE). For 36 IR-bright DOGs that show [O iii]λ5007 emission in the SDSS spectra, we performed a detailed spectral analysis to investigate their ionized gas properties. In particular, we measured the velocity offset (the velocity with respect to the systemic velocity measured from the stellar absorption lines) and the velocity dispersion of the [O iii] line. We found that the derived velocity offset and dispersion of most IR-bright DOGs are larger than those of Seyfert 2 galaxies (Sy2s) at , meaning that the IR-bright DOGs show relatively strong outflows compared to Sy2s. This can be explained by the difference in IR luminosity contributed from active galactic nuclei, (AGN), because we found that (i) (AGN) correlates with the velocity offset and dispersion of [O iii] and (ii) our IR-bright DOG sample has larger (AGN) than Sy2s. Nevertheless, the fact that about 75% IR-bright DOGs have a large (>300 km s−1) velocity dispersion, which is a larger fraction compared to other AGN populations, suggests that IR-bright DOGs are good laboratories to investigate AGN feedback. The velocity offset and dispersion of [O iii] and [Ne iii]λ3869 are larger than those of [O ii]λ3727, which indicates that the highly ionized gas tends to show stronger outflows.
Effect of Hydraulic Characteristics on Fluid Transients Analysis under Different Types of Control Valves

In this study, several types of valves were used to study the impact of the valves types and closure characteristics on fluid transients. The valve closure curves, which are the variation of the effective valve opening as a function of percentage opening area, were derived for different selected valves. Six different types of valves were selected to study the effect of the valves types on fluid transient conditions. For simplification, a very simple pipeline system was assumed and presented in this study. The system is about two pipes connected in a series junction and they take the water from a constant-level reservoir at upstream and a valve at downstream. The duration of valve closure was taken as six seconds which plays an important role in the pressure development in the system. A method of char acteristics is applied to compute the transient conditions under gradual closure of the valves. Valve data of various forms were compiled and reported as discharge and headloss coefficients as a function of valve opening. The effect of valve geometry and operation on the relative valve opening were compared. Discharge and headloss coefficients were also compared between valve types. The study concluded that transient conditions depend on the valve type . The comparison between the results of all valve types indicated that the changes in pressure and discharges depend on valve type where there is a difference in effective valve opening. It can be concluded that the valve with the highest value of valve effective opening has less effect on transient conditions, i.e., the faster changes of effective valve opening the larger the effect on transient conditions (discharge and the greater the magnitude of the pressure wave). This study would help to select the property valve in pipeline design.