Miracle-dz/UniFAR-FTUs huggingface dataset:
Study of bluff body flow fields and aeroelastic stability using a discrete vortex method

A two dimensional discrete vortex method has been developed to simulate the unsteady, incompressible flow field and aerodynamic loading on bluff bodies. The method has been validated successfully on a range of simple bluff geometries, both stoic and oscillating, and has also been validated on a wider range of problems including static and oscillating suspension bridge deck sections. The results have been compared with experimental data and demonstrate good qualitative and quantitative agreement, and also compare favourably with other computational methods. Most notably, the method has been used to study the aeroelastic stability of a recent bridge deck, with accurate predictions of the critical flutter velocity. The basis of the method is the discretisation of the vorticity field into a series of vortex particles, which are transported in the flow field that they collectively induce. In the method presented herein, the time evolution of the system of particles is calculated by solving the vorticity transport equation in two stages: employing the Biot-Savart law to calculate particle velocities and random walks to simulate flow diffusion. The Lagrangian approach to the calculation avoids the necessity for a calculation grid, and therefore removes some of the problems associated with more traditional grid based methods. These include numerical diffusion and difficulties in resolving small scale vortical structures. In contrast, vortex methods concentrate particles in areas of vorticity, and can provide high quality representations of these small scale structures. Dispensing with a calculation mesh also eases the task of modelling a more arbitrary range of geometries. In particular, vortex methods are well suited to the analysis of moving body problems. Results of the validation exercise are firstly presented for a range of simple bluff geometries to give confidence in the results before moving on to more complex geometries. These results include the effect of incidence on the aerodynamic loading for a stationary square cylinder, and also a study of the effect on aspect ratio for rectangular cylinders. This includes the limiting case of a flat plate. Vortex lock-in is studied on a square cylinder undergoing a forced transverse oscillation, for a range of frequencies and amplitudes. The results in each of these cases are in good agreement with experimental data.
Impact of dietary supplementation of l-Arginine, l-Glutamine, and the combination of both on nursing performance of multiparous sows

Abstract Dietary supplementation with arginine (Arg) or glutamine (Gln) has been considered as an option to improve nursing performance in reproductive sows. This study investigated whether a low-level supplementation of Arg or Gln or a blend of both could modify milk nutrients and improve piglets’ growth beyond weaning. Seventy-two multiparous sows were assigned to four groups: one group fed a control diet, three treatment groups fed the control diet supplemented with either 0.35% Arg, 0.35% Gln, or both, from day 108 of gestation until weaning at day 26 of lactation. Immediately after birth, the litters were cross fostered to 13 piglets and monitored until 2 wk after weaning. Sows body condition and litter growth were assessed. Colostrum and milk samples were collected for nutrient analyses. Plasma concentrations of insulin-like growth factor 1 (IGF-1) around weaning were determined in sows and two representative piglets per litter. Supplementing Gln or the combination of Arg and Gln had no effect on the parameters studied. Arg supplementation increased weaning weight, while decreasing the variation of piglet weights 2 wk after weaning. There was no correlation with plasma IGF-1 since the hormone was not altered in sows or piglets. The colostral concentration of fat tended to increase in the Arg-group, whereas protein, lactose, energy, and polyamine concentrations remained unaffected. Milk samples obtained on day 12 and 25 of lactation were not influenced by dietary treatment. The data indicate that there might be a window of opportunity, explicitly at the onset of lactation, for dietary intervention by maternal dietary Arg supplementation.
The Effectiveness of PBL Model with STEAM Approach Assisted by Android Application on Students' Mathematical Problem Solving Ability

The mathematical problem solving ability of class XI students at an islamic senior high school is still low. Based on the results of the initial test which was attended by 181 students, only 16,02% of students completed the KKM, while 83,98% had not. Therefore, study aims to analyses the effectiveness of PBL learning model with STEAM appr oach assisted by android application. The design of this study was quasi-experimental with a posttest-only control group design. Class XI MIPA 7 as the experimental class and class XI MIPA 2 as the control class. The data consists of tests and documentation. The test instrument is the posttest in the form of an essay. Data analysis used t-test and z-test. The results show that PBL with the STEAM approach assisted by an android application is effective in improving the mathematical problem solving abilities of class XI students on the material of sequences and series. Further research on the PBL model with the STEAM approach assisted by android applications still needs to be done, so that its application can be in accordance with the times.
Transversality problems in string topology and de Rham chains

We propose a new approach to resolve transversality problems in string topology. For this purpose, we introduce a notion of de Rham chain complex, which is a hybrid of the singular chain complex and the usual de Rham complex. Using this machinery, we define a chain complex of the loop space, on which one can define string topology operations without any perturbations. All operations are defined so that they respect the length filtration on the loop space.
Assessment of Liver Function among Patients with Rheumatoid Arthritis Versus Patients with Psoriatic Arthritis Treated by Methotrexate

Background:Hepatotoxicity is a well-known adverse effect of methotrexate therapy. Objective: To assess liver functions such as ALT and AST in patients with rheumatoid arthritis and psoriatic arthritis receiving methotrexate and compare the liver functions in those patients cured by using methotrexate. Patients and Methods: This observational, cross-sectional analysis involved 50 patients with RA who satisfied EULAR-ACR-2010 standards for RA and 50 PSA cases who fulfilled CASPAR classification criteria for PSA, receiving constant weekly MTX therapy (oral or parenteral) up to 25mg, together with folic acid, liver function parameters such as ALT and AST in patients with rheumatoid and psoriatic arthritis were estimated and compared. Results: 78% of the 100 participants who were enrolled in this study were females. 10% of the participants were smokers, but there was no significant difference between the two groups (p = 0.410). None of the patients were alcoholics. There was a significant difference between the groups regarding the type of medications. 42% of the RA group were on other medications compared with 2% of the PSA cases (p < 0.001). The mean ALT of the PSA group (26.0 IU/L) was considerably (p = 0.005) greater than the mean of the RA group (19.6 IU/L) which shows an insignificant (p = 0.055) change between the two groups regarding the means of AST (26.3 IU/L in the PSA participants matched with 20.6 IU/L in the RA participants). Conclusion: Our research data shows that patients with PSA treated by methotrexate had a higher mean ALT level when compared with RA patients.
Integrated STEM Education: The Effects of a Long-Term Intervention on Students’ Cognitive Performance

Integrated Science, Technology, Engineering and Mathematics (iSTEM) education is a promising approach to attracting more qualified and better motivated students to STEM fields. In this study, we respond to one of the salient challenges facing integrated STEM educational research, namely investigating its educational impact. We developed a large-scale intervention where all STEM components are integrated and examined the impact this integrated STEM curriculum has had on cognitive performances regarding physics, mathematics, technological concepts, and integrated physics and mathematics. In total, 859 grade 9 students, distributed across 39 Flemish different schools, participated in a long-term study. The results of multilevel analyses show that iSTEM education had positive effects on cognitive performance in terms of mathematics knowledge and application and technological concepts. Also, differential intervention effects were found with regard to student characteristics. Since the impact was only apparent after two years, we stress the importance of a long-term integrated STEM approach.
A time-resolved spectroscopic study and modeling of the dwarf nova BV Centauri

Time-resolved observations of the double-lined, 14 hr 40 min spectroscopic binary BV Centauri are presented. The spectrum shows hydrogen emission lines from an accretion disk around the white dwarf primary and absorption lines from a late-type star of spectral class G5-8IV-V. The reduction technique is discussed and yields the velocity amplitudes K/sub a/bs = 128 +- 3, K/sub e/ms = 139 +- 9 km s/sup -1/, with a derived orbital period, P = 0.611179. The velocity amplitudes are significantly different from previously published results. Results of stellar evolution computations are presented to better define the nature of the presumably evolved secondary in this long period system. Masses of the mass-losing secondary and accreting white drarf are: M/sub s/ec = 0.9 +- 0.1 M/sub sun/ and M/sub W/D = 0.83 +- 0.1 M/sub sun/. A mass transfer rate of 5.0 +- 2.0 x 10/sup -10/ M/sub sun/ yr/sup -1/ is determined from orbital and stellar evolution considerations in conjunction with observed relative component brightnesses. The secondary star probably has a small He core and has a radius at least 50% larger than that for a zero-age main-sequence star of the same mass.
The Effect of Problem-Solving-Based Learning on Critical Thinking Skills of Nursing Students

Background: Nurses need critical thinking (CT) skills when faced with unstable clinical conditions. CT is a style of thinking, which requires new and student-oriented education. Nursing educators should train active students interested in continuous learning with their educational methods. Objectives: Therefore, this study aimed to determine the effect of problem-solving-based education on the CT skills of nursing students of the Islamic Azad University of Golestan province in Iran. Methods: This experimental study used a pre-test and post-test with a control group. The study area was the department of undergraduate nursing students of the Islamic Azad University of Golestan province in the 7th and 8th semesters in the Islamic Azad University of Golestan province in 2022. The population included 50 nursing students, who were selected by convenient sampling. The data collection tool was the demographic profile form and the California Critical Skills Test (CCST). Results: In the control group, the results of the paired t-test in different dimensions, including truth-seeking (P = 0.91), criticism (P = 0.82), organization (P = 0.74), Curiosity (P = 0.52) and the overall size (P = 0.06) did not show significant differences before and after the intervention. However, there was a significant difference in the dimensions of analysis (P = 0.03) and self-confidence (P < 0.01). The ANCOVA test showed a significant difference (P < 0.01, Eta = 0.55) by removing the pre-test. Thus, 55% of post-test changes could be related to problem-solving skills. Conclusions: Based on the effectiveness of problem-solving learning in increasing the CT of nursing students, CT levels can be raised using this method. Therefore, it is recommended to hold the related courses in educational centers, especially universities and higher education centers.
Minimum Cost Locations for Parallel Public Transit Lines

Passengers are to be carried to a rapid transit line by feeder transit lines perpendicular to the rapid transit line. How should the feeder lines be located and how should their schedules respond to a passenger arrival pattern that varies with location and time? These questions are answered for a system with a simple cost structure by using continuous functions to approximate the behavior of the system, then minimizing the cost by the methods of elementary calculus.
The Intersectionality of Race and Gender in Financial Planner Use

Using the 2019 Survey of Consumer Finances, this study examined the role of race and gender regarding the use of financial planners through the lens of intersectionality. More specifically, this study investigated whether there was an association between race and gender, notably for Black women, and financial planner use compared to White women, Black men, and White men. Results of the interaction analyses in the probit model show that Black women were more likely to use financial planners than other groups. A follow-up analysis indicated that results were significant when comparing Black women to White men but there was no significant difference when comparing Black women to Black men and White women. This study adds to the literature by taking into consideration the implications of dual minority status on Black women’s financial well -being and decision-making. Implications are provided for financial therapists and professionals, policymakers, and funders.
Efficient estimation of covariance selection models

A Bayesian method is proposed for estimating an inverse covariance matrix from Gaussian data. The method is based on a prior that allows the off-diagonal elements of the inverse covariance matrix to be zero, and in many applications results in a parsimonious parameterisation of the covariance matrix. No assumption is made about the structure of the corresponding graphical model, so the method applies to both nondecomposable and decomposable graphs. All the parameters are estimated by model averaging using an efficient Metropolis--Hastings sampling scheme. A simulation study demonstrates that the method produces statistically efficient estimators of the covariance matrix, when the inverse covariance matrix is sparse. The methodology is illustrated by applying it to three examples that are high-dimensional relative to the sample size. Copyright Biometrika Trust 2003, Oxford University Press.
Physical and Sensory Characteristics of Food Bar Based on Beneng Taro (Xanthosoma undipes K. Koch) and Soy Protein Isolate

Beneng taro, a local food plant in Banten Province, has enormous potential to be developed as an effort to diversify food, one of which is used as a raw material in the manufacture of food bars. Ingredients formulation and roasting temperature can affect the characteristics of the resulting food bar. Therefore, researchers consider it necessary to conduct research related to the physical and sensory characteristics of food bars based on beneng taro, mocaf and soy protein isolate as one of food diversification, as well as the best formulation and roasting temperature of the food bar. This study used a completely randomized split plot design with two factors, namely roasting temperature and ingredients formulation. The L* value, a* value, and texture were all significantly impacted by the roasting temperature, according to the results. Meanwhile, the L*, a*, and b* values were significantly impacted by the addition of beneng taro flour and soy protein isolate. The a* value, b* value, as well as the panelists' evaluation of the color, texture, and overall parameters are significantly impacted by the interaction between the two factors. The formulas for the chosen food bars contained 30% taro flour and 70% soy protein isolate, and they were baked at 140 °C (S 2 R 2 ) with the following characteristics: texture 26,59 N; L* value 46,75; a* 14,99; b* 32,17; and the value of preference for color, taste, aroma, texture and overall is 2,23; 2,10; 2,23; 2,15; and 2,25.
Effectiveness of Interferential Current for the Treatment of Chronic Low Back Pain

Background: The problem of pain in the lumbar region is a big part of physiotherapy, which aims not only to relieve patients from pain but also to restore them to their previous levels of functionality. Various interventions are used for this physiotherapy treatment, one of them is electrotherapy. This review aims to investigate the effectiveness of interferential current (IFC) in pain management in patients with chronic low back pain (CLBP). Methods: A search was conducted in electronic databases Google Scholar, PubMed, PEDro, Science Direct, and Cochrane Library in Greek and English language, combining keywords of the central axes of the issue such as "chronic low back pain" or "CLBP", "pain relief", "electrotherapy", "interferential current " or "IFC". Results: Ten RCT studies, which examine the effectiveness of IFC were included in this review. A total of 807 patients were measured. Most studies (n=6) compared IFC with placebo and one of those combined placebo IFC with an exercise program. Three studies compared the different types of IFC and one study IFC with usual caressing. Conclusion: The results of this review demonstrated that IFC showed a positive effect on reducing pain and improving the functioning of patients with CLBP. This approach presents to be a sufficient intervention method combined or not with other therapies.
Parameter Estimation for Periodically Stationary Time Series

Abstract. The innovations algorithm can be used to obtain parameter estimates for periodically stationary time series models. In this paper, we compute the asymptotic distribution for these estimates in the case, where the innovations have a finite fourth moment. These asymptotic results are useful to determine which model parameters are significant. In the process, we also develop asymptotics for the Yule–Walker estimates.
Nanofabrication methods for improved bone implants

The hypothesis of this thesis, is that nanofeatures on the surface of an implant enhance bio-functionality. This work introduces several approaches to micro- and nano-patterning which are well-known in the MEMS and NEMS fields. Micro- and nano-engineering of materials like ceramics, polymers, silicon and titanium are presented. The work was part of the STW project NanoSurf. In the first part, micro structuring of ceramic materials, utilizing tape casting and micromoulding, techniques was found to be a useful method delivering micro-patterned bioceramics. Further, a novel nanofabrication method for ridges and grooves on biomaterials delivered highly ordered nanoscale patterns. To obtain nanofeatures on biomaterial surfaces, first Laser Interference Lithography was employed to define patterns in resist on silicon. Next the structures were transferred into silicon with multiple reactive ion etching (RIE) steps. Finally the surface features were reproduced into polymers and used for in vitro studies or copied by means of Nanoimprint lithography (NIL) onto biomedical grade titanium and etched with an optimized chlorinated plasma reactive ion etching (RIE) process. In the biological research the nanofabricated surfaces were explored in interaction with ECM proteins. Finally the nanostructures were replicated in polystyrene slabs and a series of experiments with osteoblasts was performed, showing characteristic reactions of cells on distinct surface features.
Effect of Low Frequency Cerebellar Repetitive Transcranial Magnetic Stimulation on Balance Impairment in Patients With Cerebral Infarction

Objective To investigate the effect of low frequency cerebellar repetitive transcranial magnetic stimulation (rTMS) on balance impairment in patients with cerebral infarction. Methods Thirty-two patients were randomly divided into two groups: rTMS group (n=16) and control (n=16). In the rTMS group, treatment was performed five times per week for 2 weeks (10 sessions), and in the control group, a sham coil was used with the sound and sensation of scalp similar to the rTMS coil. Patients in both groups underwent a conventional rehabilitation program. Berg Balance Scale (BBS) was used as the primary outcome measurement. Timed Up and Go test (TUG), 10-m walk test (10mWT), and Activity-specific Balance Confidence scale (ABC) were used as the secondary outcome measurement. All scales were measured at baseline (T0), after 10 sessions of rTMS (T1), and at 4 weeks after treatment completion (T2) by therapists with over 5 years of clinical experience. Results There were significant improvements between T0 and T1, and between T0 and T2, for all assessed items in the rTMS group. Whereas there were significant improvements between T0 and T1, and between T0 and T2, for the BBS and 10mWT in the control group. TUG (-4.87±5.05 vs. -0.50±2.97 seconds) and ABC score (8.10±8.33 vs. 0.16±0.97) were observed significant differences in comparison of the changes from T0 to T1 between the two group. BBS score (4.40±3.66 vs. 1.88±3.14), TUG (-4.87±4.56 vs. -0.62±2.96 seconds) and ABC score (8.22±7.70 vs. -0.09±0.86) differed significantly from T0 to T2 between the two groups. Conclusion Our findings suggest that low-frequency cerebellar rTMS is helpful for improving balance in patients with cerebral infarction, and maybe a beneficial treatment for these patients.
Intraluminal Small Bowel Metastasis From Primary Lung Cancer

Lung cancer is the leading cause of cancer-related death worldwide, with frequent metastases to the brain, liver, adrenal glands, and bone. The incidence of intraluminal small bowel metastases of the lung is extremely rare and poorly documented within the literature. Few case studies have been published since the late 1980s and early 1990s. However, little is known about this rare form of metastasis. Small bowel metastatic disease has atypical symptoms that mimic a variety of other diseases; as a result, signs and symptoms may be overlooked until the disease has progressed to a late stage. Signs of small bowel obstruction, symptomatic anemia, abdominal pain, and peritonitis are commonly reported signs and symptoms. Various modalities can be utilized for the workup of suspected small bowel metastasis, including positron emission tomography, computed tomography, and various forms of endoscopy. The prognosis for lung cancer patients with intestinal metastases is poor, with many only surviving months to a few years after diagnosis. Therefore, it is critical to consider small bowel masses as a differential diagnosis in a patient with primary lung cancer who demonstrates clinical signs consistent with symptomatic anemia secondary to gastrointestinal (GI) bleeding, peritonitis, or small bowel obstruction. We report an unusual case of intraluminal and fungating small bowel masses in a patient who had previously undergone lung resections and chemo-immunotherapy. She was diagnosed with non-small undifferentiated carcinoma with tumor necrosis over 12 years before disease recurrence in the bilateral lungs, right adrenal gland, bone, and small bowel. The discovery of the small bowel metastases occurred while undergoing treatment for advanced-stage disease. At this time, she completed chemo-immunotherapy and remained on maintenance immunotherapy. The patient also underwent a partial right adrenalectomy and radiotherapy to the right adrenal gland. Given that she was experiencing symptomatic anemia and further workup indicated that the GI masses were causing her anemia, she underwent palliative small bowel resection of the masses. The pathology results demonstrated that the masses originated from her primary lung cancer, confirming metastatic disease to the small bowel.