Miracle-dz/UniFAR-FTUs huggingface dataset:
Large-Eddy Simulation of the Acoustic Response of a Perforated Plate

An original numerical configuration is designed to compute the acoustic response of a multi-perforated plate submitted to normal acoustic excitation with Large-Eddy Simulation (LES). It consists in simulating an infinite perforated plate, the periodicity of the geometry allowing to reduce the computational domain to a periodic configuration containing only one perforation. The numerical configuration is adapted from the experimental set up studied by Bellucci et al. A low Mach and low Reynolds numbers bias flow is imposed through the perforated plate, resulting in a jet issuing from the hole, but no grazing flow is considered. Flow and acoustic results from LES are presented. The dynamic results show that the jet does not respond in the same way for every frequencies, resulting in different acoustic responses. Acoustic results are compared with available experimental measurements and to three existing analytical and numerical models. The overall agreement between all data is very good, in particular at low frequencies. Excellent agreement is observed with the most sophisticated model, developed by Jing & Sun. Notably, the LES results show the relevance of the hypotheses of this model concerning the shape of the jet separation at the aperture inlet.
The Relationship between Violent Political Rhetoric and Mass Shootings

Abstract Mass shootings are a public health crisis and have numerous negative effects on health, mental health, and economic variables. Identification of correlates and causes of mass shootings is an important research priority, as findings may inform efforts to reduce these events and their sequelae. A relationship has been speculated between violent political rhetoric (VPR) and mass shootings. The current study was an investigation of this relationship that addressed gaps and limitations in the limited research on this relationship. Analyses of a set of publically available 69-month time series were conducted. Results showed a 12-month periodicity in mass shootings and a positive relationship between VPR and mass shootings, controlling for changes in gross domestic product, generalized imitation, and gun ownership. Implications of findings for actions social service agencies may take to help reduce VPR and mass shootings are discussed, including anticipatory preparations for such events and their post traumatic sequelae, and collaborations with local media organizations and national groups that focus on reducing hate. Implications for future research on the relationship between VPR and mass shootings are discussed, with emphases on improved measurement of VPR and inclusion of variables not included in analyses in the current study.
Strategies for guided-wave structural health monitoring

Structural health monitoring (SHM) using guided waves is one of the only ways in which damage anywhere in a structure can be detected using a sparse array of permanently attached sensors. To distinguish damage from structural features, some form of comparison with damage-free reference data is essential, and here subtraction is considered. The detectability of damage is determined by the amplitude of residual signals from structural features remaining after the subtraction of reference data. These are non-zero due to changing environmental conditions such as temperature. In this paper, the amplitude of the residual signals is quantified for different guided-wave SHM strategies. Comparisons are made between two methods of reference signal subtraction and between two candidate sensor configurations. These studies allow estimates to be made of the number of sensors required per unit area to reliably detect a prescribed type of damage. It is shown that the number required is prohibitively high, even in the presence of modest temperature fluctuations, hence some form of temperature compensation is absolutely essential for guided-wave SHM systems to be viable. A potential solution is examined and shown to provide an improvement in signal suppression of approximately 30 dB, which corresponds to two orders of magnitude reduction in the number of sensors required.
All for One and One for All: How Intrafirm Networks Affect the Speed of Knowledge Recombination

Drawing on absorptive capacity and social network theory, we examine the effect of intrafirm network closure, tie strength, and diversity on firms? recombination speed of technologically distant external knowledge. Results from an event history study of 113 pharmaceutical firms, which engage in technology licensing in the period 1986-2003, reveal that the time to recombine external knowledge into own invention increases with technological distance. However, intrafirm co-invention network closure and diversity shorten the time to recombine distant external knowledge. These results mark the importance of inventors? knowledge networks as antecedent of the speed with which firms can absorb external knowledge.
The Effect of Pre-evacuation on Evacuation Times in the Simulex Model

The evacuation time of a building in an emergency can be broken down into a number of constituent times including the pre-evacuation time and the travel time. This paper examines how distributions of pre-evacuation times affect the occupant travel time and hence their effect on the evacuation time in the Simulex model. A simple scenario is assessed mathematically and compared with the results from Simulex with further simulations carried out on a somewhat more complex scenario. Because we expect the pre-evacuation time to be characterized by a distribution of values, simply adding the maximum pre-evacuation time and the movement time over-estimates the evacuation time. Furthermore, when the preevacuation distribution is small the travelling and queuing effects dominate the simulated evacuation time. When the pre-evacuation distribution is large, then travel and queuing effects are not so important and it is the pre-evacuation time that dominates. Finally, the paper examines some aspects of the Simulex model in situations where there is a high occupant density in a space.
Comparison of the effects of the recommended and reduced rates of Bentazon application on weed control and on growth and seed yield of soybean cultivars

An experiment was conducted in split plots using the randomized complete block design in three replications during cropping season 2011 2012 to study the effects of different rates of application of the herbicide Bentazon on weed control and on seed yield of soybean cultivars. The factors investigated were the three cultivars of Hill, Sari, and Line 032 (as the main factor), and the five rates of 2 L/h (the recommended rate), 75%, 50%, and 25% of the recommended rate (1.5, 1, and 0.5 L/h, respectively) and the control of not applying Bentazon (as the sub factor). Results of the experiment showed that the effects of the cultivars of soybean and the mutual effects of the rate of Bentazon application and cultivar on yield components including the number of pods on the main stem, the number of pods per plant, the number of seeds per pod, the 100 - seed weight, and finally seed yield were not significant at the one percent probability level, while the effects of applying different rates of Bentazon on the features studied were significant at the one percent probability level. Comparison of the means of data regarding the application of Bentazon indicated that the number of pods on the main stem, the number of pods on lateral shoots, the length of filled pods, the number of seeds per pod, the 100 - seed weight, and the number of unfilled seeds decreased with an increase in the rate of application of Bentazon: the largest number of seeds per pod (78.77), the maximum number of pods on lateral shoots (75.6), the greatest number of seeds per filled pod (2.61), and the maximum 100 - seed weight (18.10 g) were achieved at the maximum rate of Bentazon application. These results also revealed that the weight of dry matter produced and the soybean seed yield also increased with a rise in the rate of application of Bentazon: the greatest weight of dry matter (89.73 g/half a square meter) and the largest seed yield (318 g/per half a square meter) were achieved at the maximum rate of Bentazon application (the recommended rate), while these two features declined when the rate of application of Bentazon decreased. In the comparison of the mutual effects of cultivar and rate of application of Bentazon, it was also revealed that seed yield in all three cultivars went up with an increase in the rate of Bentazon application. Results obtained showed that the greatest seed yield (312.7 g/half a square meter) was achieved at the maximum rate of Bentazon application in Line 032, and that the smallest (35.5 g/half a square meter) belonged to the cultivar Hill in the control treatment (in which no Bentazon was used).
Scalar magnetostatic potential approach to the prediction of the excess inductance of grounded via's and via's through a hole in a ground plane

A quasi-static method is described for calculating the excess inductance of via's. The considered via geometry contains connecting strips, pads on the via, and a finite ground plane thickness. An integral equation based on the scalar magnetic potential /spl psi/ is solved. The inductance is found by calculating the magnetic flux through a cut introduced to define /spl psi/ in an unequivocal way. The problem is generally solved for via through-holes; the grounded via-configuration is found as a limiting case. The influence of the geometric parameters on the via inductance is examined. >
“As long as there’s no mortal risk”: the perspectives of members in combat arms occupations on children’s outdoor risky play

ABSTRACT Parents’ experiences with risk can influence their perspectives on their children’s outdoor risky play. Parents in combat arms occupations in the Canadian Armed Forces have unique experiences with risk, as their occupations regularly include encountering and successfully navigating risky environments in military operations. In this study, we conducted seven semi-structured interviews with parents in combat arms occupations and used risk and sociocultural theory. Our reflexive thematic analysis resulted in two main findings: (1) Members believed outdoor risky play was beneficial for children to experience and supported children’s engagement in it; and (2) members distinguished between children’s outdoor risky play-related non-serious and serious injuries. Our findings advance scholarly conversations on how risk may be perceived and negotiated more broadly in populations who engage with risk on a frequent basis.
Communications patterns of new product development team leaders

A study of the communication patterns of two types of new-product development (NPD) team leaders, operating and innovating, is reported. Specific attention is given to differences in the leaders' communication with team members and with external groups. The results indicate that the communication patterns of NPD team leaders depend on the type of team and the informational demands of the project. This can help NPD team leaders focus on communicating about issues specific to their task and communicating with specific groups who can help the team achieve its goals. It is shown that degree of success differentiates the communication patterns of team leaders, particularly within operating types of teams. >
Seismic Performance Evaluation of Reinforced Concrete-Filled Steel Tube Pile/Column Bridge Bents

The seismic performance of reinforced concrete-filled steel tube (RCFST) pile/column bridge bents is examined based on the results of large-scale experimental tests, inelastic dynamic analyses, and parametric moment curvature analyses. It was found that when the pile/column is subjected to double curvature bending, the damage limit states are largely controlled by the tensile strain in the steel longitudinal bars at the top hinge. When the pile/column is subjected to single curvature bending, the limit states are controlled by the tensile strain in the steel tube at the below-ground hinge. However, for the single curvature bending case and relatively thick steel tubes it was also found that the pile/column is likely to remain elastic during a seismic event. Strain limit states are proposed and expressions to relate the strain limits with section curvatures are developed.
Fitness for Purpose Design of a Steel Cylinder for Hydrogen-Natural Gas Blends

The present paper deals with a structural integrity assessment of a seamless steel cylinder for transportation of HCNG blend for a 200 bar pressure application with 30% H2 content. First a fracture mechanics approach with an estimation of expected number of cycles and failure mode is applied to a typical cylinder for CNG transportation designed with a traditional approach. The same approach is then used for an assessment of the same cylinder working in a HCNG environment. Fracture toughness was experimentally measured in HCNG blend according to a stepwise procedure and used as input for cylinder failure mode prediction. Fatigue crack growth rate was estimated based on comparison of two interrupted full scale tests carried out in oil and in the investigated HCNG environment. Acceleration of crack propagation, when using HCNG blend, suggests that a dedicated structural integrity assessment of the cylinder is needed to determine the proper design parameters for a safe product life.Copyright © 2011 by ASME
New Approach for Including Traffic Volumes in Crash Rate Analysis and Forecasting

A critical part of any risk assessment is identifying the appropriate measure of exposure to the risk in question. Incorporating vehicle miles traveled per year into highway crash analysis was an important step forward for identifying truly hazardous locations, as opposed to locations with high volumes but a low number of crashes per vehicle. This exposure measure is now ubiquitous in highway crash reporting, although it has not been proved to be the most accurate representation of highway crash risk. Research results demonstrate that the relationship between traffic volume and crash count is more complex than this and that it relates to quantities such as the distribution of traffic through the day and the types of crashes experienced. A proposed specification for models of crash count incorporates all these considerations in a form that is accessible to most highway crash analysts and permits comparison of crash rates between various highway locations in a way that accounts for the nonlinearity of the crash rate for traffic volume.
Drivers of Mobility in the Global South

Empirical studies in developing countries tend to find higher levels of socioeconomic persistence across generations compared with those of high-income economies. However, there have been relatively few advances in the identification of the drivers of such higher levels of intergenerational persistence. By focusing on relevant evidence from developing countries and emerging economies, this chapter points to some of the potential drivers of social mobility that are either outside those typically considered in high-income countries or likely to be of greater relevance in the developing world. The chapter builds on the standard model of intergenerational mobility to discuss the appropriateness of some of its assumptions in a developing-country context. It will then advance some suggestions for future theoretical and empirical investigations of social mobility in the Global South.
Comparison of the Human Gut Microbiota between Normal Control Subjects and Patients with Colonic Polyps and Colorectal Cancer

Background: The human gut microbiota has been related to numerous colonic diseases. To identify colorectal cancer (CRC)-associated microbiota, the gut microbiomes of patients with colonic polyps and CRC compared to normal controls were analyzed.Methods: Between July and December 2020, forty-four stool samples were obtained from participants older than 50 years who were scheduled for elective colonoscopies at the Surgery Clinic, Songklanagarind Hospital. The samples were divided into 3 groups (17 normal control, 17 colonic polyps, and 10 CRC) and were collected for analysis with a 16s metagenomic sequencing library preparation with MiSeq Reporter software (MSR) following the protocol of the 16s metagenomics workflow. The microbiome data were analyzed with Kruskal–Wallis test with the Dunn-Bonferroni post hoc method.Results: The relative proportions of beneficial butyrate-producers Kineothrix alysoides, Eubacterium rectale, and Roseburia inulinsivorans were significantly higher in healthy control and colonic polyp groups compared with the CRC group at the top three lowest p-values. The recommended CRC biomarker Clostridium symbiosum was shown in a significantly higher proportion in the CRC group than in the normal control group. The prevalences and relative proportion of the novel CRC-associated species Acutalibacter muris and the familiar CRC-associated species Christensenella massiliensis and lntestinimonas butyriciproducens were significantly higher in the CRC group than in the normal control and colonic polyp groups at the top three lowest p-values.Conclusions: A correlation between specific bacteria and clinical outcomes was found in this pilot study. The microbiome data revealed possible microbial biomarkers associated with CRC. Studies with larger numbers of stool samples are required to substantiate our findings.
Managerial Implications for Architectural Competitions Based on Paradox Theory

Despite being one of the most important means to obtain commissions, explore in design terms and develop design quality, architectural competitions are an extremely controversial practice. Nevertheless, they are increasingly adopted within the European procurement law, to the point that exploring and understanding their debated issues is essential to improve their effectiveness. We use a paradox lens to open up managerial insights and to develop a theory of architectural competitions’ paradoxes. We propose a set of paradoxes and managerial implications for architects and clients/juries with regard to each competition phase: programming, selection and shortlist, design of the proposals, and jury decision making
Gigabit-per-second all-optical 1300-nm to 1550-nm wavelength conversion using cross-phase modulation in a semiconductor optical amplifier

Summary form only given. In conclusion, we have demonstrated all-optical conversion of 1.25 Gbit/s data from 1300 nm to 1550 nm. The penalty for conversion was 2.4 dB at a BER of 10/sup -9/. The wavelength converter demonstrated here potentially operates at high speed, with low input power and low polarization sensitivity.
Polysomnography Analysis of Electroencephalography in Patients Expending Benzodiazepine Drugs

Polysomnography Analysis of Electroencephalography in Patients Expending Benzodiazepine Drugs Da Jun Jang, Dong Kyu Lim, Jae Kyung Kim Department of Biomedical Laboratory Science, General Graduate School, Dankook University, Cheonan, Korea Department of Medical Laser, Dankook University Graduate School of Medicine, Cheonan, Korea Department of Biomedical Laboratory Science, Dankook University College of Health Sciences, Cheonan, Korea
Women on Finnish dairy farms: Hard work in the midst of traditions and changes

Abstract This research focuses on the work, working conditions and role of women on dairy farms in the context of agricultural change and traditions. The qualitative, case study sample is comprised of work observations and interviews of women on ten dairy farms. The women typically worked on the farm as a consequence of marriage or courtship with a farmer, and most selected ‘farm entrepreneur’ as their professional title. Women were involved in a wide range of different work tasks, mainly in cattle barns and at home. It was observed that whereas men operated machinery in cattle barns, women performed physical, manual work tasks. One of women’s tasks was to monitor and take care of the health and living conditions of farm animals. Nearly all the women considered work with animals and being ‘close to nature’ rewarding, but half assessed the workload as too heavy. General strategies used to avoid exhaustion were to employ salaried workers, utilise networks and/or use contractors. Nearly all respondents had experienced some kind of problems related to organising absence from farm work during sickness or holidays. To improve women’s work situation and facilitate their valuable contribution to agriculture, this article concludes by offering a number of suggestions to inform future research and practices.
Neurocognitive Effects of Cocoa and Red-Berries Consumption in Healthy Adults

In recent decades, the elderly population has increased at higher rates than any other population group, resulting in an increase in age-related diseases such as neurodegenerative and cognitive impairment. To address this global health problem, it is necessary to search for new dietary strategies that can prevent the main neurocognitive problems associated with the ageing process. Therefore, the aim of the present study was to analyze the effect of cocoa flavanols and red berry anthocyanins on brain-derived neurotrophic factor (BDNF) and nerve growth factor receptor (NGF-R) and to stablish the possible improvement in cognitive performance by using a battery of neurocognitive tests that included the Verbal Learning Test Spain-Complutense, the Spatial Recall Test 10/36 BRB-N, the Wechsler Adult Intelligence Scale III and IV, the STROOP Task and the Tower of London Test. A randomized, double-blind, parallel-group study was performed in 60 healthy volunteers between 50 and 75 years old who consumed a cocoa powder, a red berries mixture or a combination of both for 12 weeks. After the intervention, we observed a reduction in the time needed to start (p = 0.031) and finish (p = 0.018) the neurocognitive test known as the Tower of London in all groups, but the decrease in time to finish the task was more pronounced in the intervention with the combination of cocoa-red berries group. We failed to show any significant difference in BDNF and NGF-R sera levels. However we found a negative correlation between BDNF and the number of movements required to finish the TOL in women (p = 0.044). In conclusion, our study showed an improvement in executive function, without any change in neurotrofin levels, for all intervention arms.
Educating Gifted Children in Turkey: A Retrospective Analysis and the Current State

The purpose of this study was to examine the education of gifted children in Turkey during 1923–2020 from an historical perspective and to evaluate the current practices in gifted education. Drawing from the literature review, we first report on the policies and the legal and corporate advancements implemented in the field of gifted education since the Declaration of the Republic. Subsequently, current practices in Turkey, including Science and Arts Centres, high schools for gifted students, and resource rooms, are evaluated. The results of a review of the relevant literature are discussed in the light of the current situation. In conclusion, it is understood that coherent and consistent policies in the field of gifted education have been developed more strongly in Turkey during the last 30 years, corporate advancements have also increased during this period, and scientific studies have gained an upward enhancement during the last 20 years. Despite all these advancements, it is concluded that current practices have still various deficiencies and should continue to be developed.