Miracle-dz/UniFAR-FTUs huggingface dataset:
The effect of contact lines on the dynamics of drops and liquid bridges

In the first part of the thesis, the evolution of a three-dimensional liquid drop on an inclined substrate oscillating vertically is examined. The oscillations are assumed to be weak and slow, which effectively makes the inertia and viscosity of the liquid negligible. The effects of the vibration-induced inertial force and gravity are balanced by surface tension forces. Asymptotic expressions are derived for the mean velocity of the drop up to the second order, where the small parameter, , is the ratio of the vibration-induced inertia to surface tension. There is no assumption made regarding the thickness of the drop. This distinguishes this study from other theoretical studies of the problem, all of which relied on the thin-film approximation. From an experimental point of view, this approximation is highly restrictive, whereas, crucially, the conclusions of this study may be tested through a specially-designed experiment. It is shown that, if the amplitude of the substrate’s oscillations exceeds a certain threshold value, , drops climb uphill. itself depends strongly on the thickness of the drop that, in turn, depends on the drop’s equilibrium contact angle, β0. It is found that, as β0 grows, there is a dramatic decrease in , which means that thick drops can climb for much weaker substrate vibrations. In the second part of the thesis, the stability of a static liquid bridge rising from an infinite pool, with its top attached to a horizontal plate suspended at a certain height above the pool’s surface is studied. Two different models are examined for the bridge’s contact line. Model 1 assumes that the contact angle always equals Young’s equilibrium value. Model 2 assumes a functional dependence between the contact angle and the velocity of the contact line, and it is further argued that, if this dependence involves a hysteresis interval, the contact line is effectively pinned to the plate. It is shown that, within the framework of Model 1, all liquid bridges are unstable. In Model 2, in turn, both stable and unstable bridges exist (the former have larger contact angles β and/or larger heightsH than the latter). For Model 2, the marginalstability curve in the (β,H)-parameter space is computed.
A bound on the Euler number for certain Calabi-Yau 3-folds.

A Calabi-Yau manifold is a compact complex Manifold M of dimension n with vanishing first Chern class. If M is Kahler, this is equivalent to M having SU(n)holonomy. For the case of surfaces it is well known that M is then analytically isomorphic to a complex torus or a K3-surface. Restricting to algebraic surfaces and fixing a Polarisation, there is then a unique 3-dimensional (resp. 19-dimensional) moduli space of each type of Calabi-Yau surfaces. Furthermore, all K3-surfaces are deformations of a given one, say a smooth quartic in P. The case n = 3 is of particular interest to physicists, since compactification of the 6 infinitesimal dimensions in superstring theory requires a 3-fold with SU(3)-holonomy. In fact, the physicists need (Kahler) Calabi-Yau 3-folds with non-vanishing Euler-Poincare characteristic (to be denoted Euler number in what follows) β(Μ)φΟ, since e(M) determines the number of generations of particles. This implies that there is a finite cover M' —> M such that M' is simply connected. From a mathematical standpoint the following question suggests itself s a generalisation of the (trivial) 2-dimensional case:
Solar power generation system for reducing leakage current

ABSTRACT This paper proposes a transformer-less multi-level solar power generation system. This solar power generation system is composed of a solar cell array, a boost power converter, an isolation switch set and a full-bridge inverter. A unipolar pulse-width modulation (PWM) strategy is used in the full-bridge inverter to attenuate the output ripple current. Circuit isolation is accomplished by integrating the isolation switch set between the solar cell array and the utility, to suppress the leakage current. The isolation switch set also determines the DC bus voltage for the full-bridge inverter connecting to the solar cell array or the output of the boost power converter. Accordingly, the proposed transformer-less multi-level solar power generation system generates a five-level voltage, and the partial power of the solar cell array is also converted to AC power using only the full-bridge inverter, so the power efficiency is increased. A prototype is developed to validate the performance of the proposed transformer-less multi-level solar power generation system.
Factors related to health-related quality of life in patients with acute coronary syndrome in West Java, Indonesia: A correlational study

Background Although acute coronary syndrome impacts patients’ health-related quality of life, a dearth of studies explore this issue in Indonesia. Thus, understanding factors associated with health-related quality of life among patients with acute coronary syndrome is a necessity. Objective This study aimed to examine the relationships between age, pain, dyspnea, functional status, self-efficacy, social support, and health-related quality of life in patients with acute coronary syndrome in West Java, Indonesia. Methods This study employed a descriptive correlational study involving 186 patients with acute coronary syndrome purposively selected in the outpatient clinics of the top referral public hospital. Data were collected in 2020 using validated instruments: Rose Questionnaire for Angina (RQA), Rose Dyspnea Scale (RDS), Seattle Angina Questionnaire (SAQ), General Self-efficacy Scale (GSE), ENRICHD Social Support Instrument (ESSI), and MacNew Health-Related Quality of Life. Data were analyzed using descriptive statistics and Spearman-rank correlation. Results Overall, the health-related quality of life in patients with acute coronary syndrome was high (Mean = 4.97, SD = 0.92), including in its subscales: emotional (Mean = 4.94, SD = 0.88), physical (Mean = 5.07, SD = 1.12), and social (Mean = 5.05, SD = 1.55) subscales. Significant factors related to health-related quality of life were pain (r = 0.296, p <0.001), functional status (r = 0.601, p <0.001), dyspnea (r = -0.438, p <0.001), and self-efficacy (r = 0.299, p <0.001). Meanwhile, age and social support had no significant relationships with health-related quality of life (p = 0.270, p = 0.059). Interestingly, social support was significantly correlated with the emotional subscale of health-related quality of life (r = 0.156, p = 0.034). Conclusion Functional status, pain, and self-efficacy were positively correlated with health-related quality of life, while dyspnea had a negative association. This finding serves as basic information for nurses and other healthcare professionals to consider the related factors identified in this study to improve nursing interventions in order to increase health-related quality of life among patients with acute coronary syndrome.
Determinants of Survival of HIV Patients Receiving Dolutegravir: A Prospective Cohort Study in Conflict-Affected Bunia, Democratic Republic of Congo

This study aims to determine the factors influencing HIV-related mortality in settings experiencing continuous armed conflict atrocities. In such settings, people living with HIV (PLHIV), and the partners of those affected may encounter specific difficulties regarding adherence to antiretroviral therapy (ART), and retention in HIV prevention, treatment, and care programs. Between July 2019 and July 2021, we conducted an observational prospective cohort study of 468 PLHIV patients treated with Dolutegravir at all the ART facilities in Bunia. The probability of death being the primary outcome, as a function of time of inclusion in the cohort, was determined using Kaplan–Meier plots. We used the log-rank test to compare survival curves and Cox proportional hazard modeling to determine mortality predictors from the baseline to 31 July 2021 (endpoint). The total number of person-months (p-m) was 3435, with a death rate of 6.70 per 1000 p-m. Compared with the 35-year-old reference group, older patients had a higher mortality risk. ART-naïve participants at the time of enrollment had a higher mortality risk than those already using ART. Patients with a high baseline viral load (≥1000 copies/mL) had a higher mortality risk compared with the reference group (adjusted hazard ratio = 6.04; 95% CI: 1.78–20.43). One-fourth of deaths in the cohort were direct victims of armed conflict, with an estimated excess death of 35.6%. Improving baseline viral load monitoring, starting ART early in individuals with high baseline viral loads, the proper tailoring of ART regimens and optimizing long-term ART, and care to manage non-AIDS-related chronic complications are recommended actions to reduce mortality. Not least, fostering women’s inclusion, justice, peace, and security in conflict zones is critical in preventing premature deaths in the general population as well as among PLHIV.
How effective is information on soil-landscape units for determining spatio-temporal variability of near-surface soil moisture?

In the last decades, a growing interest in fostering advanced interdisciplinary studies is leading to the establishment of observatories in pilot catchments for long-term monitoring of hydrological variables and fluxes. Nevertheless prior to sensor network installation, this investment necessitates preliminary surveys on key-variables such as near-surface soil moisture in order to prevent risks of erronously distributing sensors by missing sufficient spatial information for understanding hydrological processes within the landatmosphere interactions. The availability of maps describing areas with similar morphological, topographical, soil, and vegetation characteristics enable preliminary surveys to be organized for capturing spatio-temporal variability of soil moisture as best as possible. The soil-landscape classification can be considered as an interesting approach for grouping mapping units with similar hydrological behavior. Therefore, we assume the soil-landscape units as hydrotopes or hydrological similar units. Six transects were established along two hillsides of the Upper Alento River catchment (southern Italy) which is a proper candidate to become a Critical Zone Observatory. In this paper we use a soil-landscape map to infer spatial and temporal dynamics of soil moisture measured along these transects, whereas quantitative analyses were obtained by using multivariate techniques. The effectiveness of available information on soil-landscape mapping units is evaluated with respect to different observed patterns of soil moisture: wetter- and drier-than average observation points belong to agricultural and forested hillslopes, respectively. Soil texture and topographical controlling factors, especially clay content and slope gradient, are found to explain approximately 70% of the observed spatial variations in soil moisture along the forested hillslopes. The spatial structure explained by the environmental controlling factors decreases to 45% in the cases of the agricultural hillslopes mainly due to perturbations induced by grazing and tillage practices.
A review of air travel behavior and climate change

Air transport challenges the world's net‐zero carbon ambitions. The sector has consistently grown and causes warming as a result of both CO2 and other, short‐lived emissions. Two principal solutions have been proposed to reduce the contribution of aviation to climate change: innovations of technology and the development of interventions to trigger behavioral change. Technological innovations include new propulsion technologies and the use of sustainable aviation fuels. Behavioral change includes flight avoidance, substitution with other means of transport, the choice of efficient flight options, and carbon offsetting. This article focuses on behavior; it offers an overview of factors that lead to consumers traveling by air and discusses demand distribution complexities. The importance of price for air travel decisions is assessed, and evidence of travel “wants” are contrasted with “needs,” the latter investigated in light of the COVID‐19 pandemic. The review of relevant scholarly work culminates in an action list enabling air travelers, policy makers, the aviation industry, researchers and society to meaningfully advance low‐carbon air transport trajectories.
Molecular Dynamics Simulation of Coiled Carbon Nanotube Pull-Out from Matrix

The interaction between coiled carbon nanotubes (CCNT) and the polymer matrix is important in the mechanical, thermal, and electrical properties of the CCNT reinforced nanocomposite. In this study, molecular dynamics (MD) simulations were performed to study the interfacial characteristics of polymer nanocomposites (PNCs). Furthermore, the influence of the geometries of the CCNTs on the load transfer mechanism is evaluated. Pullout simulations considering different geometries of CCNTs are carried out to examine the tensile force and the interfacial shear stress (ISS). The results reveal that the maximal tensile force is reduced by increasing CCNT inner diameters, increasing the helix angles, and decreasing nanotube diameters. The distance between CCNTs and the polymer matrix is varied, and the interfacial distance favors greater ISS. Decreasing the inner diameter of the CCNT, the helix angle, and the tube diameter increases the ISS. The enhancement mechanism of CCNT/polymer composites has also been illustrated. Due to a lack of experimental results, only numerical results are given. The present study helps to understand the interfacial adhesion behavior between the polymer matrix and CCNTs and is expected to contribute to the development of CCNT reinforced polymer composites.
Compact microstrip bandpass filter using dual closed-loop stepped impedance resonator

Abstract A dual closed-loop stepped impedance resonator (DCLSIR) is investigated and used in designing a compact microstrip bandpass filter (BPF). The proposed DCLSIR is symmetrical; as a result, the symmetric characteristics of the resonator have been used. The design equations are derived and used to support the circuit design. The center frequency, position of transmission zeros, and fractional bandwidth (FBW) are easily tuned by changing the physical dimensions of the resonator. Three transmission zeros are generated to improve the performance in the upper stopband. A DCLSIR prototype BPF is fabricated with a center frequency of 9.3 GHz, and evaluated to validate the design concept. The measured FBW is 9.25%, the insertion loss is 1.58 dB, and the return loss is over 17 dB. The measurement results agree well with the simulation results.
Is There Any Effect of Covid-19 on the Performance of the Sharia Stock Index?

The implementation of social distance during the Covid-19 pandemic has an impact on economic activity and stock market indices. Evidently, the increase in confirmed cases has had no discernible effect on economic activity. This article compares the performance and returns of the Islamic stock index before and after the pandemic. Data were gathered from the Jakarta Islamic Index (JII), the Indonesian Sharia Stock Index (ISSI), and the Jakarta Islamic Index 70 (JII70) for the April 2019-March 2020 (pre-Covid-19) and April 2020-June 2021 (post-Covid-19) periods. The Paired Sample-T Test was employed to compare the return values of each Islamic stock index. The results show that these indices performed better in Covid-19 than in previous years. The independent sample test reveals that only the ISSI index demonstrated a statistically significant difference between returns before and during the Covid-19 periods. This study concludes that Covid-19 has implications for increasing the average return and decreasing the risk of all sharia indices studied during the observation period. Analysts predicted that rising prices would boost sharia stock returns, beginning with BRI sharia shares and spreading to other sharia industries such as ANTM, INCO, EMTK, and the banking sector. ==========================================================================================================ABSTRAK – Adakah Pengaruh Covid 19 Terhadap Kinerja Indeks Saham Syariah? Penerapan social distancing selama masa pandemi covid-19 berdampak pada aktivitas ekonomi dan indeks pasar saham. Hanya saja, peningkatan jumlah kasus terkonfirmasi virus corona tidak berpengaruh signifikan terhadap aktivitas ekonomi. Tujuan artikel ini adalah untuk menguji perbedaan kinerja dan return indeks saham syariah pada periode sebelum pandemi dan setelah pandem. Data penelitian merupakan data saham syariah yang dikumpulkan dari Jakarta Islamic Index (JII), Indeks Saham Syariah Indonesia (ISSI) dan Jakarta Islamic Index (JII70) periode April 2019 – Maret 2020 (sebelum Covid-19) dan periode April 2020 – Juni 2021 (saat Covid-19). Data analisis menggunakan Paired Sample-T Test untuk mengkomparasi nilai return masing-masing indeks saham syariah. Hasil penelitian menunjukkan indikasi kinerja indeks saham syariah yang lebih baik selama Covid-19 dibandingkan sebelumnya. Selain itu, perhitungan independent sample test menunjukkan hanya indeks ISSI yang memberikan perbedaan return yang signifikan sebelum dan selama masa Covid-19. Kajian ini menyimpulkan bahwa Covid-19 berimplikasi pada peningkatan rata-rata return untuk semua indeks syariah yang ditelit dan memiliki risiko yang lebih rendah pada periode covid-19. Beberapa analis menyatakan kenaikan harga akan meningkatkan return saham syariah dimulai dari pergerakan saham syariah BRI yang juga didorong oleh industri syariah lainnya seperti ANTM, INCO, EMTK dan industri perbankan.
Comparison of Three Phenotypic Methods and PCR for Rapid Detection of Carbapenemase ‎Production in Klebsiella spp. and Acinetobacter spp.

of Acinetobacter isolates were positive for one or more genes coding for carbapenemase by PCR with predominance of blaOXA-48 gene. Chromogenic media gave positive results in 98% (49/50) of isolates with sensitivity 100% and specificity 0% for detection of carbapenemase producers. MHT gave positive results in 45 isolates out of 48 PCR positive isolates with a sensitivity of 93.8% and specificity 0% for detection of carbapenemase production. Blue carba test gave positive results in 48 isolates out of 48 PCR positive isolates with a sensitivity of 100% and specificity 100% for detection of carbapenemase production. Conclusion: Blue carba test agreed with PCR with a sensitivity of 100% and specificity 100%, However it failed to detect the carbapenemases detected by other phenotypic tests .
Evaluation of antiulcer activity of herbal drugs on experimental animal: Myrica nagi (Myricaceae)

The anti-ulcer activity of Methanolic extract of Myrica nagi (Myricaceae) fruit MEMN was investigated in pylorus ligation and methanol-induced ulcer models in Wistar rats. In both models, the common parameter determined was ulcer index MEMN at doses of 200,400 mg/kg p.o produced significant inhibition of the gastric lesions induced by Aspirin-induced ulcers & pylorus ligation-induced ulcers. The extract (200, 400 mg/kg) showed a significant (P < 0.001) reduction in gastric volume, free acidity and ulcer index as compared to the control. This present study indicates that Myrica nagi fruit extract has potential antiulcer activity in both models. These results may further suggest that methanolic extract was found to possess antiulcer genic as well as ulcer healing properties.
Auditor dysfunctional behavior mediates the effect of locus of control, turnover intention, and time budget pressure on audit quality

Dysfunctional behavior that can directly affect audit quality is referred to as audit quality reduction behaviors. The research aims to study the mediating role of the auditor dysfunctional behavior towards the effect of locus of control, turnover intention, and time budget pressure on audit quality. Sample consists of 151 public accounting firms in Bali. Data are collected using a 1 to 4 Likert-Like Scale questionnaire. Data analysis using SEM PLS finds that external locus of control, turnover intention, and time budget pressure have negative effect on audit quality; external locus of control, turnover intention, and time budget pressure have positive effect on the dysfunctional behavior of auditors; auditor's dysfunctional behavior negatively affects audit quality; and auditor dysfunctional behavior mediates the effect of external locus of control, turnover intention, and time budget pressure on audit quality.
The Epidemiological Situation of the Managed Honey Bee (Apis mellifera) Colonies in the Italian Region Emilia-Romagna

Simple Summary The collapse of honey bee colonies is an important phenomenon worldwide. The individual and synergic actions of pathogens are one of the causes of this decline. Monitoring programs are essential to understand and prevent the epidemiological patterns that are involved. The present study aimed to investigate the health status of honey bees in the Emilia–Romagna region (northern Italy) during the year 2021, on workers from 31 apiaries. The prevalence and abundance of DWV, KBV, ABPV, CBPV, Nosema ceranae, and trypanosomatids (Lotmaria passim, Crithidia mellificae, Crithidia bombi) were investigated four times in the year using molecular methods. Trypanosomatids were not found in any of the samples, while DWV, CBPV and N. ceranae were the most prevalent pathogens. Pathogens had different peaks in abundance over the months, showing seasonal trends related to the dynamics of both bee colonies and Varroa destructor infestation. The results of this study suggest that the monitoring program could be useful to understand the dynamics of honey bee pathogens. Abstract The recent decades witnessed the collapse of honey bee colonies at a global level. The major drivers of this collapse include both individual and synergic pathogen actions, threatening the colonies’ survival. The need to define the epidemiological pattern of the pathogens that are involved has led to the establishment of monitoring programs in many countries, Italy included. In this framework, the health status of managed honey bees in the Emilia–Romagna region (northern Italy) was assessed, throughout the year 2021, on workers from 31 apiaries to investigate the presence of major known and emerging honey bee pathogens. The prevalence and abundance of DWV, KBV, ABPV, CBPV, Nosema ceranae, and trypanosomatids (Lotmaria passim, Crithidia mellificae, Crithidia bombi) were assessed by molecular methods. The most prevalent pathogen was DWV, followed by CBPV and N. ceranae. Trypanosomatids were not found in any of the samples. Pathogens had different peaks in abundance over the months, showing seasonal trends that were related to the dynamics of both bee colonies and Varroa destructor infestation. For some of the pathogens, a weak but significant correlation was observed between abundance and geographical longitude. The information obtained in this study increases our understanding of the epidemiological situation of bee colonies in Emilia–Romagna and helps us to implement better disease prevention and improved territorial management of honey bee health.