Miracle-dz/UniFAR-FTUs huggingface dataset:
Higher order Bell polynomials and the relevant integer sequences

The Bell polynomials [3] are a mathematical tool for representing the nth derivative of a composite function. They are strictly related to partitions [1], [2], [21]. Several applications of the classical Bell polynomials have been considered in [5], [7], [9] (in connection with [22]), [13], [14]. Some generalized forms of Bell polynomials appeared in literature, see e.g. [11], [20]. Further generalizations can be found in [15], [16], and for the multidimensional case in [6], [19]. In particular, in [15], the higher order Bell polynomials and their main properties were introduced and recently, in [18], a recursion formula for the polynomial coefficients An,k of the classical Bell polynomials was derived. This last result allows to compute the complete Bell polynomials Bn and the relevant Bell numbers bn, for every integer n. In this article, after recalling this theory, and by using a more compact notation borrowed from [6], we prove the recurrence relation formula for the polynomial
Preface to the Second Koala Retrovirus Workshop online 25–27 May 2021. In Proceedings of the Second Koala Retrovirus Workshop, ed. D. E. Alquezar-Planas, D. P. Higgins, C. L. Singleton, and A. D. Greenwood

In 2013, the first Koala Retrovirus Workshop was held in San Diego, bringing together biology and veterinary specialists to assess and discuss the state of knowledge on koala retrovirus (KoRV) and to form professional bridges and networks. Tremendous progress has been made in the years following the San Diego meeting, in large part due to ongoing international collaborations that were fostered to study KoRV. This volume presents peer-reviewed papers from most of the oral presentations and discussions held during the Second Koala Retrovirus Workshop in 2021. Unfortunately, the COVID-19 pandemic forced the workshop into an online only format. Despite this limitation, three days of discussions based on workshop presentations highlighted current knowledge and important information gaps, culminating in suggested ways forward, all summarized in this volume.
Current Perspectives in Vaginal Laxity Measurement: A Scoping Review

Abstract This scoping review aimed to identify and categorize the available measurement options for vaginal laxity (VL), their indications of use, and whether these measurements can sufficiently provide objective clinical judgment for cases indicated for vaginal rejuvenation with many treatment options nowadays. Systematic searches were conducted on five electronic databases, manually searching articles' bibliographies and predetermined key journals with no date or study design limitations. We included all studies involving VL in their inclusion criteria, treatment indications, and outcome parameters. We used the Arksey and O'Malley frameworks as the guideline in writing this scoping review. Of the 9,464 articles identified, 66 articles and 11,258 subjects were included in the final analysis. The majority of studies were conducted in obstetrics and gynecology (73%), followed by plastic surgery (10%), medical rehabilitation (4.5%), dermatology (4.5%), and others (8%). Most studies originated from the North American region (30%). The following measurement tools were used: (1) interviews, (2) questionnaires, (3) physical/digital examinations, (4) perineometers, and (5) others. Our results suggested that subjective perception of laxity confirmed by directed interview or questionnaire is sufficient to confirm VL. Additional evaluation of pelvic floor muscle through digital examination or perineometer or other preferred tools and evaluation of sexual function through validated questionnaire (Female Sexual Function Index, Female Sexual Distress Scale-Revised, etc.) should follow to ensure holistic care to patients. Future research on the psychometric properties (reliability and validity) of commonly used measurements and the correlation in between subjective and objective measurements should be initiated before their clinical applications.
Sleep Quality and Quantity in Caregivers of Children with Type 1 Diabetes Using Closed-Loop Insulin Delivery or a Sensor-Augmented Pump

Introduction. Parents of children living with type 1 diabetes (T1D) often report short and/or poor quality sleep. The development of closed-loop systems promises to transform the management of T1D. This study compared sleep quality and quantity in caregivers of children using a closed-loop system (CL) or sensor-augmented pump (SAP) therapy. Method. Data from sleep diaries, accelerometers, and questionnaires were provided by forty parents (classified as caregiver 1 (main analyses) or 2 (supplementary analyses) based on their contribution towards treatment management) of 21 very young children aged 1 to 7 years living with T1D (mean age: 4.7 (SD = 1.7)). Assessments were made at a single post-randomisation time point when the child was completing either the 16-week CL arm (n = 10) or the 16-week SAP arm (n = 11) of the main study. Results. Overall, there was a mixed pattern of results and group differences were not statistically significant at the p < 0.05 level. However, when we consider the direction of results and results from caregiver 1, sleep diary data showed that parents of the CL (as compared to the SAP) group reported a shorter sleep duration but better sleep quality, fewer awakenings, and less wake after sleep onset (WASO). Actiwatch data showed that caregiver 1 of the CL (as compared to the SAP) group had a shorter sleep latency; greater sleep efficiency; and less wake after sleep onset. Results from the Pittsburgh Sleep Quality Index also showed better sleep quality for caregiver 1 of the CL group as compared to the SAP group. Conclusions. Results from this study suggest that sleep quality and quantity in parents of children using CL were not significantly different to those using SAP. Considering effect sizes and the direction of the non-significant results, CL treatment could be associated with better sleep quality in the primary caregiver. However, further research is needed to confirm these findings. This trial is registered with NCT05158816.
Fear of the COVID-19 Pandemic in Driving Mobile Payment Applications Adoption

This study aims to analyze how the perceived fear of COVID-19 will affect the adoption of mobile payment applications. The data were collected from 500 mobile payment applications users in Indonesia. The Structural Equation Model-Partial Least Square (PLS-SEM) was used to analyze the relationship between variables and test the hypotheses. According to the findings, perceived fear influences two TAM variables: perceived usefulness and perceived ease of use. Attitude is significantly influenced by the two TAM variables. However, only perceived ease of use has a significant influence on intention to use. Finally, attitude influences the intention to use mobile payment applications. This study will assist mobile payment application providers in planning services and increase the intention of mobile payment applications during the COVID-19 pandemic. This study will also append the subsisting knowledge about the mobile payment applications literature in the context of the pandemic. This research complements the marketing literature in analyzing the adoption of mobile payment applications during the COVID-19 pandemic based on perceived fear of the COVID-19 pandemic.
Dynamic Prediction of Performance Degradation Characteristics of Direct-Drive Electro-Hydraulic Servo Valves

Direct-drive electro-hydraulic servo valves are widely used in the aerospace industry, in the military, and in remote sensing control, but there is little research and discussion on their performance degradation and service life prediction. Based on previous research, erosion wear is the primary physical failure form of direct-drive electro-hydraulic servo valves, and parameters such as opening, oil contamination, and pressure difference are used as influencing factors of direct-drive electro-hydraulic servo valves. Pressure gain and leakage are used as performance degradation indicators of servo valves, and multiple types of sensors are used for data monitoring. Experimental benches are arranged and verified through experiments. Based on the data and laws obtained from the experiments, the exponential smoothing algorithm and the ARIMA model algorithm were used to establish a prediction model for the servo valve, and the dynamic prediction of the performance indexes was carried out. The error calculation and analysis of the prediction results and the experimental results were then carried out using the Copula function and other mathematical knowledge to verify the accuracy and applicability of this prediction model. This study provides theoretical support and practical guidance for applying and designing direct-drive electro-hydraulic servo valves in industrial applications such as aerospace, sensor experiments, and remote sensing control.
CuO–Water Nanofluid Magnetohydrodynamic Natural Convection inside a Sinusoidal Annulus in Presence of Melting Heat Transfer

Impact of nanofluid natural convection due to magnetic field in existence of melting heat transfer is simulated using CVFEM in this research. KKL model is taken into account to obtain properties of CuO–H2O nanofluid. Roles of melting parameter , CuO–H2O volume fraction , Hartmann number (Ha), and Rayleigh (Ra) number are depicted in outputs. Results depict that temperature gradient improves with rise of Rayleigh number and melting parameter. Nusselt number detracts with rise of Ha. At the end, a comparison as a limiting case of the considered problem with the existing studies is made and found in good agreement.
The Overview of Clerkship Students of the Faculty of Medicine and Health Sciences at Krida Wacana Christian University Year 2022 awareness towards Refractive Error

<p class="BIKDWCONTENT"><strong>Background</strong> Knowledge of medical science is essential to basic medical clerkship students who should prepare for a clinical clerkship. Eye disease is still one of the biggest health problems globally, especially those which cause blindness, one of which is related to refractive disorders. </p><p class="BIKDWCONTENT"><strong>Purpose</strong> This study aims to explore knowledge about refractive abnormalities to basic medical clerkship students of UKRIDA in 2022. </p><p class="BIKDWCONTENT"><strong>Method</strong> It employs a descriptive research method, and the questionnaires are created based on a Likert scale and shared on Google Forms. </p><p class="BIKDWCONTENT"><strong>Result</strong> The number of participants is 80 people with an age range of 20-25 years with 67.5% of women. A total of 43.75% of students have a good level of knowledge, and 56.25% of them hold a sufficient level of knowledge about refractive disorders. Meanwhile, 86.25% of them have a good understanding about eye anatomy and refractive examination. 75.75% have a good level of knowledge about myopia. 32.5% have a good level of knowledge about hypermetropia. And, as many as 35% students have a good understanding of astigmatism. Further, a total of 37.5% of students have a good level of knowledge about refractive anomalies. </p><strong>Conclusion</strong> A total of 43.75% of students have a good level of knowledge, and 56.25% have a sufficient level of knowledge about refractive disorders. Age, education level, environmental factors, and social factors influence refractive conditions.
Market and Industrialization Opportunities of Rumah Unggul Sistem Panel Instan (RUSPIN) Technology Using Business Model Canvas

Rumah Unggul Sistem Panel Instan (RUSPIN) technology is the development of Rumah Instan Sederhana Sehat (RISHA) with several improvements. Besides resistance to earthquakes, this technology has advantages such as ease and speed of installation compared to conventional houses. As a new technological innovation that has been proven, to develop RUSPIN technology to be an industrialization model in the future, therefore a study of technology business plan is required. Research objectives eager to see the market and industrialization opportunities of RUSPIN technology. The study using Business Model Canvas (BMC) concept which strived to combine 9 business aspects such as customer segments, value proposition, channels, customer relationships, revenue streams, key resources, key activities, key partners, and cost structure into one complete concept map. As the result of this study, the market opportunity for RUSPIN technology is very large with the market segmentation is families that do not own a home and the target market for Low-Income Families (MBR). RUSPIN technology also has an opportunity to be industrialized by looking at the demand side (market opportunities), while from the supply side, efforts are needed to increase the number of certified RUSPIN applicators and developers.
The unique photocatalysis properties of a 2D vertical MoO2/WO2 heterostructure: a first-principles study

The structural, electronic, and optical properties of a 2D out-of-plane heterostructure of MoO2/WO2 are investigated with first-principle calculations. The most favorable stacking configuration was a direct band gap semiconductor of ~1.71 eV, which is in the range of visible light. Interestingly, we found that the lowest conduction band and the uppermost valance band were dominated by the d electron from the MoO2 and WO2 layer respectively, based on the decomposed charge density analysis. It implies that the photoexcited electron and hole can be well separated in the MoO2/WO2 heterostructure in photocatalysis. The calculated optical absorption spectra of a MoO2/WO2 heterostructure have remarkable responses in the visible light area. Our results suggest that a MoO2/WO2 heterostructure has potential applications in photocatalysis.
Extended Fluid-dynamic Modelling for Numerical Solution of Micro-Scale Flows

Extended Fluid-Dynamic Modelling for Numerical Solution of Micro-Scale Flows James G. McDonald Doctor of Philosophy Graduate Department of Aerospace Engineering University of Toronto 2011 This study is concerned with the development of extended fluid-dynamic models for the prediction of micro-scale flows. When compared to classical fluid descriptions, such models must remain valid on scales where traditional techniques fail. Also, knowing that solution to these equations will be sought by numerical methods, the nature of the extended models must also be such that they are amenable to solution using computational techniques. Moment closures of kinetic theory offer the promise of satisfying both of these requirements. It is shown that the hyperbolic nature of moment equations imbue them with several numerical advantages including an extra order of spacial accuracy for a given reconstuction when compared to the Navier-Stokes equations and a reduced sensitivity to grid irregularities. In addition to this, the expanded set of parameters governed by the moment closures allow them to accurately model many strong non-equilibrium effects that are typical of micro-scale flows. Unfortunately, traditional moment models have suffered from various closure breakdowns, and robust models that offer a treatment for non-equilibrium viscous heat-conducting gas flows have been elusive. To address these issues, a regularized 10-moment closure is first proposed herein based on the maximum-entropy Gaussian moment closure. This mathematically wellbehaved model avoids closure breakdown through a strictly hyperbolic treatment for viscous effects and an elliptic formulation that accounts for non-equilibrium thermal diffusion. Moreover, steps toward the development of fully hyperbolic moment closures for the prediction of non-equilibrium viscous gas flow are made via two novel approaches. A thorough study of each of the proposed techniques is made through numerical solution of many classical flow problems.
Measurement of Breath Velocity and Volume on Speaking, and Performance of Local Exhaust System as Prevention Measure of Infection

This study proposes a novel approach combining a local exhaust ventilation system (LEV) and a whole underﬂoor air distribution system (WUFAD) in the consulting room. This study assumes that two persons (doctor and patient) are sitting face to face and talking without a mask in a simple room regarded as a consulting room. To model people talking, exhaled air velocity and volume from talking were required, so we estimated velocity speed using an ultrasonic anemometer and volume using a PET bag and mask. Then CFD steady analyses were carried out, setting various parameters (hood height, hood ﬂow rate, horizontal hood position, and ACH) using the breath experiment results. Capture eﬃciency and contribution distribution for the hood (SVE5: scale for ventilation eﬃciency 5) for tracer gas have been calculated. Infection risk for the doctor also has been calculated using the Wells-Riley model. The estimation’s results showed that exhaled air velocity was 0.30m/s and volume was 5.2L/min from talking. The CFD results showed that hood flow rate significantly affected capture efficiency. SVE5 showed that ACH greatly inﬂuenced the hood’s eﬀective area. The infection risk for the doctor revealed that the combination of the LEV and WUFAD could protect doctors from infection risk under low supply conditions: 60 m3/h/person (6 ACH).
The Effect of Product Quality and Distinctiveness on Consumer Loyalty Mediated by Consumer Satisfaction

This research aims to analyze the effect of product quality, distinctiveness, and consumer satisfaction on consumer loyalty; examine the effect of product quality and distinctiveness on consumer loyalty mediated by consumer satisfaction. This research employed quantitative approach by using 190 customer of Sambel Pecel Karangsari Blitar as the sample. The sampling technique used in this research is accidental sampling in collecting the respondents and purposive sampling in choosing respondents with the criteria matched to the research objectives. Ordinary Least Square (OLS) and Path analysis are the method used to conduct the research analysis. The results showed product quality had significant positive influence on consumer loyalty; distinctiveness had significant positive influence on consumer loyalty; consumer satisfaction had significant positive influence on consumer loyalty; product quality had direct influence on consumer loyalty; distinctiveness had direct influence on consumer loyalty; there are direct and indirect influence of product quality on consumer loyalty through consumer satisfaction since the direct influence is greater than the indirect influence based on path analysis result; there is also a similar result of direct and indirect influence of distinctiveness on consumer loyalty through consumer satisfaction since the direct influence is greater than the indirect influence based on path analysis result. Sobel test proved that consumer satisfaction successfully acted as partial mediating variable.
LRO/LAMP study of the interstellar medium via the HeI 58.4 nm resonance line

Context. Recent measurements by IBEX and detailed modeling have changed our understanding of the flow of the interstellar medium through the solar system. In particular, a time dependence of the direction of the interstellar medium flow has been proposed, and a new population of helium atoms, called the “warm breeze”, has been discovered. Aims. We aim to constrain the structure of the interstellar medium close to the downwind focusing cone using the sensitive LAMP FUV/EUV imaging spectrograph onboard the Lunar Reconnaissance Orbiter. Methods. We measured the brightness of the emission line from interstellar helium atoms resonantly scattering solar photons at 58.4 nm (HeI) and compare it to our “modified cold model” of interstellar HeI sky brightness as a function of ecliptic latitude and longitude. Additionally, we compared LAMP observations to a model with time-dependent inflow direction and a model of the brightness of the “warm breeze”, to see if they can be distinguished by LAMP. Results. We find that the LAMP observations agree within error bars to our “modified cold model”, which in turn is consistent with the latest interstellar helium flow parameters found with IBEX. Our model can therefore be applied to other UV spectroscopic observations of the interstellar helium. However, LAMP observations cannot distinguish between our model and a model with a different inflow direction, since the latter has negligible effect on the 2D brightness of the interstellar HeI emission line. For the same reason, LAMP could not detect the effect of the “warm breeze”. We note a discrepancy between solar irradiances measured by TIMED/SEE and those measured by SDO/EVE. We recommend using values from SDO/EVE. Finally, we derive a value of LAMP sensitivity at the EUV wavelength (58.4 nm) of 0.485 ± 0.014 Hz/Rayleigh. Conclusions. These measurements pave the way to observations of the interstellar wind from lunar orbit.
Organization of tropical convection in low vertical wind shears: Role of updraft entrainment

Radiative‐convective equilibrium simulations with a 2 km horizontal resolution are conducted to investigate the impact on convective organization of different parameterizations for horizontal and vertical subgrid turbulence mixing. Three standard approaches for representing horizontal diffusion produce starkly differing mixing rates, particularly for the entrainment mixing into updrafts, which differ by more than an order of magnitude between the schemes. The simulations demonstrate that the horizontal subgrid mixing of water vapor is key, with high mixing rates a necessary condition for organization of convection to occur, since entrainment of dry air into updrafts suppresses convection. It is argued that diabatic budgets, while demonstrating the role of spatially heterogeneous radiative heating rates in driving organization, can overlook the role of physical processes such as updraft entrainment. These results may partially explain previous studies that showed that organization is more likely to occur at coarser resolutions, when entrainment is solely represented by subgrid‐scale turbulence schemes, highlighting the need for benchmark simulations of higher horizontal resolution. The recommendation is for the use of larger ensembles to ensure robustness of conclusions to subgrid‐scale parameterization assumptions when numerically investigating convective organization, possibly through a coordinated community model intercomparison effort.
Data‐Driven Estimation of Groundwater Level Time‐Series at Unmonitored Sites Using Comparative Regional Analysis

A new method is presented to efficiently estimate daily groundwater level time series at unmonitored sites by linking groundwater dynamics to local hydrogeological system controls. The proposed approach is based on the concept of comparative regional analysis, an approach widely used in surface water hydrology, but uncommon in hydrogeology. Using physiographic and climatic site descriptors, the method utilizes regression analysis to estimate cumulative frequency distributions of groundwater levels (groundwater head duration curves, HDC) at unmonitored locations. The HDC is then used to construct a groundwater hydrograph using time series from distance‐weighted neighboring monitored (donor) locations. For estimating times series at unmonitored sites, in essence, spatio‐temporal interpolation, stepwise multiple linear regression (MLR), extreme gradient boosting (XGB), and nearest neighbors are compared. The methods were applied to 10‐year daily groundwater level time series at 157 sites in unconfined alluvial aquifers in Southern Germany. Models of HDCs were physically plausible and showed that physiographic and climatic controls on groundwater level fluctuations are nonlinear and dynamic, varying in significance from “wet” to “dry” aquifer conditions. XGB yielded a significantly higher predictive skill than nearest neighbor and MLR. However, donor site selection is of key importance. The study presents a novel approach for regionalization and infilling of groundwater level time series that also aids conceptual understanding of controls on groundwater dynamics, both central tasks for water resources managers.