Miracle-dz/UniFAR-FTUs huggingface dataset:
Dynamic Analysis of a Floating Vertical Axis Wind Turbine using the Actuator Cylinder Flow Theory - Comparative study on a land-based versus spar vertical axis wind turbine concept and a code-to-code comparison

An ever-increasing demand for electricity pushes the wind energy industry to deep waters that favor floating concepts. Vertical axis wind turbines (VAWTs) failed for onshore applications in the 1980s, but its advantages raise the potential for competitive floating designs and ultimately lowering the cost of energy. This thesis aims to (1) better understand the dynamic response characteristics of such floating concept and (2) critically evaluate numerical tools able to perform fully coupled dynamic analysis on floating VAWTs. The studied wind energy converter is a combination of DeepWind’s two-bladed Darrieus rotor and the OC3 spar floater. A comparative study is made between this spar concept and the equivalent land-based VAWT in both steady and unsteady wind-wave environments. The dynamic responses are calculated by the aero-hydro-servo-elastic code SIMO-RIFLEX-AC, designed to model physical phenomena as accurately and efficiently as possible. Efficiencydriven design solutions imply simplifications in the field of aerodynamic, hydrodynamic and structural modeling. The effect of modeling theories on the calculated dynamic response of the spar VAWT is studied in a code-to-code comparison between HAWC2 and SIMO-RIFLEXAC. Special attention is devoted to the aerodynamic models, which are both based on the Actuator Cylinder (AC) flow theory. The model-comparison shows high energy content at the 2P frequency in most responses, this characterizes the two-bladed Darrieus rotor. Aerodynamic loads excite the first tower modes (close to 2P) of the land-based VAWT, whereas the spar VAWT hints to a tower mode around the 4P frequency. Tower tilt of the spar concept – pitch offset extends up to ! " – induces gravitational loads at the tower base and blades, and also reduce the generated power up to 5%. Dynamic content from hydrodynamic loads is strongly felt at the tower base, but the effect of wind turbulence is more significant in terms of platform motions and rotor speed. Introducing wind turbulence reduces the aerodynamic and structural loads. The code-to-code comparison shows that HAWC2’s aerodynamic model calculates lower loads in steady wind, but higher aerodynamic torque in turbulent wind. Dynamic stall significantly increases the lift force in the downwind half of the rotor, causing an overall increase of aerodynamic load at low tip-speed ratios. The wave-induced platform response is stronger in HAWC2, which is also felt at the tower base. The physical mooring system in SIMO-RIFLEX-AC endures an increased mean tension, but its standard deviation is lower.
Development of Cohesive Devices in Chinese Learners of English

This paper explores a way to provide a language rating scale with empirical underpinnings. It examines the Common European Framework of Reference for Languages: Learning, Teaching, Assessment (CEF) scale for coherence and cohesion in the light of the analysis of Chinese learners’ writing samples. The use of conjunctions in the summaries written by 23 Chinese learners of English is scrutinized to characterize the levels of the CEF scale. Stages of L2 writing development of coherence and cohesion can be inferred from the way Chinese learners used conjunctions at different levels of the scale. The use of conjunctions was found to be indicative of the ability of students to connect sentences and establish propositional relations. It is concluded that rating scales can benefit from an empirical study to confirm and evaluate the information represented in their descriptors and to adapt them to make them more useful for the scale users. Introduction Proficiency scales have served different purposes oriented towards the description of what the learners can do and how well he/she performs (North, 2000:19). They have been found limited in providing empirically validated statements in relation to what is known about second language development. Brindley (1998:126-32) suggests how various branches of second language acquisition and language testing research can contribute to prove if proficiency scale descriptors are related to second language development. This study, however, is to recognize the interface of language testing and second language acquisition in facilitating our understanding of language learning and assessment. It is addressed to add to that understanding by describing particular features of coherence and cohesion of English as Foreign Language (EFL) writing placed at different proficiency levels of the CEF1. Methodology The Subject Group. The essays were written by 23 Chinese learners of English who participated in a 4-week EAP course. Students were given special instruction and each had to take a written test at the beginning of the course and to submit an essay every week. Finally, they had also been required to summarize a reading passage using 200 words in 30 minutes in the written test. Students’ written tests were used to identify the features of coherence at different levels of language proficiency in relation to conjunctions, while the two summaries corresponding to the last assignment were selected from each level to complement those features according to raters’ judgments. The Classification of the Data. Firstly, students were put into different placement. The three levels in which the summaries were placed corresponded to A2, B1 and B2 levels, being B1 level the one with more students. 987 7th International Conference on Education, Management, Computer and Society (EMCS 2017) Advances in Computer Science Research (ACSR), volume 61
Supplementary Cementitious Materials as Sustainable Partial Replacement for Cement in the Building Industry

— Cement is the most extensively used construction material due to its strength and versatility of use. However, the production of Portland cement has become unsustainable because of high energy usage, reduction of natural non-renewable resources and emissions of greenhouse gases. Production of cement contributes to anthropogenic greenhouse gases emissions annually. The growing concerns for the environment resulting from this constant and excessive use of cement has therefore raised the need for more green materials and technology. The use of supplementary cementitious materials (SCMs) is considered as one of the many alternatives suited to address this issue and serve as a sustainable partial replacement for cement in construction. This paper will examine the reuse of these waste materials to partially replace Portland cement. It provides a critical review of literature analysing various supplementary cementitious materials which are applicable in the building industry as either partial replacement for cement or aggregates. These materials have been grouped based on source into industrial wastes, domestic/general wastes, and agricultural wastes. The reuse of these waste materials could potentially reduce the negative effects of cement production and reduce landfills which constitute an environmental nuisance. This paper seeks to inform building industry professionals and researchers in the field on the applicability of these waste materials in construction.
Academic achievement and parenting among sports and non -sports females students

: This study was conducted with an aim ofacademic achievement and parenting among sports and non -sports females students. To achieve the objective 400 female students were recruited through non-probability purposive sampling technique for this study. Further two category were made sports and non-sports with a simple size of 200 students in each. The variables selected for the study were Social competence and emotional intelligence. Tocompare the academic achievement and parenting descriptive statistics technique and t-test was used. Level of significance was set at 0.05. Comparison between sports and non-sports group have been made in BELOW presented table. Table score reads that sports group has performed better in terms of academic achievement. However the non-sports group performed slight better than sports group but that much difference is not sufficient for the claim to be right and to reject null hypothesis at 0.05 level of significance.
Ranking ﬁrms based on their ﬁnancial and diversity performance using multiple-stage unweighted TOPSIS

In this paper, we address the problem of the ranking of companies based on their diversity and ﬁnancial performance. The addressed problem is a multiple criteria decision-making problem where a composite measure needs to be obtained to rank ﬁrms. Taking as a reference the methodological approach followed by Reﬁnitiv in the construction of their Diversity and Inclusion Index, we propose an alternative ranking framework that overcomes some of the problems identiﬁed in the methodological approach of Reﬁnitiv. In particular, the proposed method in this work does not require the a priori establishment of a weighting scheme and is able to incorporate the past behavior of the companies in terms of diversity in their workplaces.
Real-Time Early Detection and Monitoring of Flooding Using Low-Cost Highly Sensitivity Ultrasound Sensing of Water Level

Flooding poses safety hazards to motorists, emergency and maintenance crews and may cause costly damage to transportation infrastructure and its operation. Flash flooding, in particular, causes the most flood-related deaths According to NOAA, in 2017 alone, flash flooding also caused $60.7 billion worth of economic damage. Low-water crossings are among the first places where deaths and significant damages to vehicles occur during flooding. With flash flooding, when a critical corridor is blocked by a high level of water, it affects the safety of the general public. To keep the critical corridors open as long as possible, and to minimize losses from flooding, accurate early detection of the rising water level is essential. The flood level detection system has to have flood stage maps in the geographic information system for the street-, roadway-, and critical-freight corridors. This area encompasses public roads in urbanized areas that provide access and connection to the primary roads for ports, public transportation or other transportation facilities. The main goal of this project is to develop cost-effective and high efficient solar-powered water level detection units and implement real-time water level monitoring for water both pavement and river stream. The project was performed with three objectives: to develop the low cost reliable real-time data of the ultrasound water level detection system, increasing its data reliability and resolution; 2) to improve an energy-saving processing system; and to deploy the ultrasound water level detection system and real-time monitoring system for water both pavement and river stream for safety measures. The obtained results and findings imply the developed monitoring system can present reliable water level data with efficient power and data transmission system.
Real-Time Parameter Inference of Nonlinear Bluff-Body-Stabilized Flame Models Using Bayesian Neural Network Ensembles

We assimilate the parameters of a low order physics-based model of a bluff-body-stabilized premixed flame by observing OH PLIF and PIV images of a 1.1 MW flame. The model is a five parameter level set (G-equation) solver with a prescribed velocity field. A Bayesian ensemble of neural networks (BayNNE) is trained on numerical simulations of the model at 2400 different parameter combinations. Once trained, the BayNNE observes the experimental data and outputs the expected values and uncertainties of the parameters of the model that best fits the experimental data. Using this model, we extrapolate the heat release rate field in physical space beyond the observed window in the experiments, and in parameter space to smaller perturbation amplitudes. We then convert the periodic heat release rate field into a distributed n-τ model, which we enter into a thermoacoustic Helmholtz solver. We find that the thermoacoustic eigenvalue drift is small but measurable, is stabilizing, and does not vary significantly during the experimental run or with the velocity amplitude. This is primarily because the time delay field τ, which is determined by the convection speed, is similar for all cases. This is consistent with the experimental images, which exhibit intermittent bouts of thermoacoustic oscillations that die away. Although this paper’s conclusions for thermoacoustic behaviour are unsurprising, the method it describes is a potentially cheap way to combine sparse experimental measurements with copious low order simulations.
From a leader and a follower to shared leadership: An identity-based structural model for shared leadership emergence

In this chapter, we develop an identity-based structural model to understand how identity processes at the individual, dyadic and team level can partially explain shared leadership emergence. We differentiate between the level at which an identity is represented (individual, relational, collective) and levels of analysis (individual, dyadic, collective) to explain how interrelated identities provide a structure for shared leadership. Using this framework, we focus mainly on individual and dyadic processes to explore how team members’ identity composition (i.e. leader and follower) and the processes regarding individual self can affect (and be affected by) dyadic and team level processes and partially explain shared leadership emergence. Throughout this chapter we address the dynamic and process-oriented role of identity as it becomes contextualized, and how cognitive, motivational and learning processes impact the team, the dyad and the individual. This chapter provides a rich perspective for understanding shared leadership in its complexity, and it develops a framework that can help organize theory and research, particularly that which explains the connection between seeing oneself as a leader and as a follower In this chapter, we develop an identity-based structural model to understand how identity processes at the individual, dyadic, and team level can partially explain shared leadership emergence. We differentiate between the level at which an identity is represented (individual, relational, collective) and levels of analysis (individual, dyadic, collective) to explain how interrelated identities provide a structure for shared leadership. Using this framework, we focus mainly on individual and dyadic processes to explore how team members’ identity composition (i.e., leader and follower) and the processes regarding individual
Hassan Reducing the Need for Multi-Input Multi-Output in Multi-Beam Base Transceiver Station Antennas Using Orthogonally-Polarized Feeds with an Arbitrary Number of

 Abstract— A multi-beam BTS (Base Transceiver Station) antenna has been developed using dual parabolic cylindrical reflectors. The ±45° polarization feeds are used in spatial diversity MIMO (Multi-Input Multi-Output). They can be replaced by single-port orthogonally polarized feeds. Then, with two sets of beams generated above each other, the ± 45° polarization ports of any conventional transceiver can be connected to two of these beam sets. Thus, with two-port transceivers, the system will be equivalent to 4x4 MIMO, instead of 2x2. Radio Frequency (RF) power combiners/splitters can also be used to combine the multiple beams into a single beam or any arbitrary number of beams/ports. The gain of the combined-beam will be more than 20-24 dBi instead of 17-18 dBi of conventional wide-beam antennas. Furthermore, the gain of the combined beam will be high over the whole beam angle. Moreover, the users will always be close to the peak gain value of the combined beam regardless of their location within the combined beam angle. The frequency bands of all the combined beams are adjusted such that they all have the same frequency Different configurations of RF power splitter/combiners can be used to provide any arbitrary number of beams/ports according to the requirements of any existing base station
Beyond Chronic Absenteeism: The Dynamics and Disparities of Class Absences in Secondary School

uniform this growth models to detailed class-attendance school students' unexcused absences grow steadily throughout a school year and over grades, while the growth of excused absences remain essentially unchanged. students starting the school year with a high number of unexcused absences, and and low-income students accumulate unexcused absences at a significantly faster rate than their counterparts. Lastly, students with higher growth rates in unexcused absences consistently report lower perceptions of all aspects of school culture than their peers. Interventions targeting unexcused absences and/or improving school culture can be crucial to mitigating disengagement. Abstract: Student absenteeism is often conceptualized and quantiﬁed in a static, uniform manner, providing an incomplete understanding of this important phenomenon. Applying growth curve models to detailed class-attendance data, we document that secondary school students’ unexcused absences grow steadily throughout a school year and over grades, while the growth of excused absences remain essentially unchanged. Importantly, students starting the school year with a high number of unexcused absences, Black and Hispanic students, and low-income students accumulate unexcused absences at a signiﬁcantly faster rate than their counterparts. Lastly, students with higher growth rates in unexcused absences consistently report lower perceptions of all aspects of school culture than their peers. targeting unexcused absences and/or improving school culture can be crucial to mitigating disengagement.
Efficacy of sildenafil in persistent pulmonary hypertension of the newborn.

… Objective: To find out efficacy of sildenafil for the treatment of persistent pulmonary hypertension of the newborn (PPHN). Study Design: Observational study. Setting: Department of Neonatology, Sughra Shafi Medical Complex, Sahara Medical College, Narowal. Period: May 2020 to April 2021. Material & Methods: A total of 22 neonates of both genders with diagnosis of PPHN were enrolled during the study period. Demographic characteristic along with information about perinatal and postnatal characteristics were recorded among all neonates at the time of admission. X-ray chest were asked. Oral sildenafil was administered as 2mg/kg per dose thrice a day to all study cases and continued till extubation. Outcome was recorded on the basis of difference in FiO2 need after initiating sildenafil, time required to get ventilator off or mortality. Results: Out of a total of 22 neonates, 13 (59.1%) were male. Majority of the neonates, 15 (68.2%) were term newborns. Mode of delivery was lower segment cesarean section in 17 (77.3%) cases. APGAR score at 5 minutes was between 7 to 10 in 13 (59.1%) newborns. There were 13 (59.1%) newborns who required immediate resuscitation following birth. Meconium aspiration syndrome was the commonest associated condition found among 8 (36.4%) neonates. As per echocardiographic findings, 13 (59.1%) neonates had severe PPHN, 5 (22.7%) moderate and 4 (18.2%) mild. Mean oxygenation index at the time of admission was noted to be 46+14. Inotropic support was administered to 19 (86.4%) cases. Mean length of neonatal intensive care unit was 15+5 days. Mortality was reported among 10 (45.4%) neonates. Conclusion: Oral sildenafil was found to be a promising option for the treatment of neonates having PPHN. Oral sildenafil was found to successfully improve oxygenation among neonates having PPHN.
The effects of wipe on contact resistance of aged surfaces

Probe measurements were made on corroded test coupons to show the effects wipe have on contact resistance. Data are provided for two types of films; oxidized copper and corrosion on porous gold due to flowing mixed gas tests (FMG). The results in both cases show contact resistance is reduced by nearly two orders of magnitude for 0.25 mm wipe. In addition, a Monte Carlo analysis was conducted using a modified version of a previously developed model of degradation. This included; adding film resistivity as a random variable for asperities that were previously considered non-conductive, and incorporating wipe in the model by considering shear forces to produce additional asperity deformation. The Monte Carlo results agree reasonably well with observation as differences can be explained within the framework of the model. It is believed improvements can be made on the predictions of the model if the mechanism of film removal and adhesion, and the variation of film resistivity are better understood.
Study on the Effect of Wet Cupping Therapy on Oxidative Stres Index and Total Antioxidant Capacity Levels: A Pilot Study Islak Stres İndeksi Total Anti Oksidan Kapasite Düzeylerine Etkisinin Araştırılması: Pilot Bir Çalışma

Purpose: Wet cupping treatment is one of the oldest known methods of treatment. Recently, some studies have shown that wet cupping therapy removes oxidants and reduces oxidative stres. However, these studies are limited. The aim of this study is to investigate the effectiveness of wet cupping treatment on oxidant-anti oxidant system. Materials And Methods: Our study consisted of 26 patients. Right before the wet cupping treatment, venous blood samples were collected. During the procedure, samples were collected from the cup blood. Right after the wet cupping treatment venous blood samples were collected again. On the 14th day, the participants were called and venous blood samples were collected. In all of these samples, total oxidant level (TOS), oxidative stress index (OSI) and total antioxidant level (TAS) levels were studied and compared. Results: Total anti-oxidant level, total oxidant level and oxidative stress index levels in cup blood were higher than all venous blood samples. While there was no significant change in TAS and TOS levels after the application, oxidative stress index levels decreased significantly. Conclusion: Wet cupping therapy reduces the oxidative stress index, which is the most important indicator of oxidative tissue damage. Therefore, it may be involved in the treatment of diseases associated with oculatory tissue damage.
Learning Objects Content Presentation Adaptation Model Considering Students' Learning Styles

 Abstract — Learning styles (LSs) correspond to the individual preferences of a person regarding the modes and forms in which he/she prefers to learn throughout the teaching/learning process. The content presentation of learning objects (LOs) using knowledge about the students’ LSs offers them digital educational resources tailored to their individual learning preferences. In this context, the most relevant characteristics of the LSs along with the most appropriate forms of LOs' content presentation were mapped and associated. Such was performed in order to define the composition of an adaptive model of LO's content presentation considering the LSs, which was called Adaptation of Content Presentation of Learning Objects Considering Learning Styles (ACPLOLS). LO prototypes were created with interfaces that were adapted to students' LSs. These prototypes were based on a model created for validation of the approaches that were used, which were established through experiments with the students. The results of subjective measures of students' emotional responses demonstrated that the ACPLOLS has reached the desired results in relation to the adequacy of the LOs interface, in accordance with the Felder-Silverman LSs Model.