Miracle-dz/UniFAR-FTUs huggingface dataset:
Importance of Radiality Constraints Formulation in Reconfiguration Problems

Obtaining accurate solutions in an acceptable computation time for the problem of distribution systems reconfiguration is very important because the topology of real distribution systems needs to be changed several times a day in online applications. In this way, the processing time of reconfiguration models must be short enough for quick response to power demand changes and performing the next switching action. One of the most important parts of the reconfiguration problem that significantly affects the computation time is the radiality constraints, in which the best radial topology must be determined quickly without the appearance of loops or isolated buses in reconfigured networks. However, this issue does not happen easily because if the radiality constraints are not defined well, the reconfiguration algorithm finds wrong solutions (non-radial configurations) or acquires the optimal topologies after intensive computations (high CPU time). Therefore, the method of modeling the radiality constraints to find proper solutions in a short computational time is so important. To address this challenge, various formulations of radiality constraints are reviewed in the current study, and their efficiencies are compared in several distribution systems according to the results presented in specialized literature. The investigations done in this paper allow the researchers and operators to better understand the importance of formulating radiality constraints for reconfiguration problems. The results analysis indicates that the adoption of the radiality constraints (64)–(68) for analytical reconfiguration methods is more appropriate while considering the constraint (76) and the fundamental loops are more suitable for metaheuristic reconfiguration algorithms.
Nigella sativa-Manganese Ferrite-Reduced Graphene Oxide-Based Nanomaterial: A Novel Adsorbent for Water Treatment

In this study, a novel nanohybrid composite was fabricated via the incorporation of manganese ferrite (MnFe2O4) nanoparticles into the integrated surface of reduced graphene oxide (rGO) and black cumin seeds (BC). The nanohybrid composite was prepared by a simple co-precipitation method and characterized by several spectroscopic and microscopic techniques. The characterization analysis revealed that the rGO-BC surface was decorated with the MnFe2O4. The strong chemical interaction (via electrostatic and H-bonding) between the integrated surface of rGO-BC and MnFe2O4 nanoparticles has been reported. The prepared composite was highly porous with a heterogeneous surface. The average size of the prepared composite was reported in the ranges of 2.6–7.0 nm. The specific surface area of the prepared composite was calculated to be 50.3 m2/g with a pore volume of 0.061 cc/g and a half pore width of 8.4 Å. As well, many functional sites on the nanohybrid composite surface were also found. This results in the excellent adsorption properties of nanohybrid composite and the effectual elimination of methylene blue dye from water. The nanohybrid was tested for various linear isotherms, such as Langmuir and Freundlich, for the adsorption of methylene blue dye. The Freundlich isotherm was the well-fitted model, proving the adsorption is multilayer. The maximum Langmuir adsorption capacity of nanohybrid composite for methylene blue was reported to be 74.627 mg/g at 27 °C. The adsorption kinetics followed the pseudo-second-order recommended surface interaction between the dye and nanohybrid composite. The interaction between methylene blue and the nanohybrid composite was also confirmed from the FTIR spectrum of the methylene blue-loaded adsorbent. The rate-determining step for the present study was intraparticle diffusion. Temperature-dependent studies of methylene blue adsorption were also carried out to estimate adsorption’s free energy, enthalpy, and entropy. The methylene blue adsorption was feasible, spontaneous, and endothermic. A comparison study revealed that the present materials could be successfully prepared and used for wastewater treatment.
EVALUATION OF THE CHEMICAL CONSTITUENTS OF WILD AND CULTIVATED MARIGOLD PLANTS.

Heba Ibrahim Abd El-Moaty 1 and Hanan Ali El-Sayed 2 . 1. Assistant professor of Phytochemistry,Medicinal and Aromatic Plants Department, Desert Research CenterElMataria, Cairo, Egypt. 2. Researcher of cultivation of Medicinal and Aromatic Plants Medicinal and Aromatic Plants Department, Desert Research CenterEl-Mataria, Cairo, Egypt. Manuscript Info Abstract . Manuscript History
Recent Developments in Direct C–H Functionalization of Quinoxalin-2(1H)-Ones via Heterogeneous Catalysis Reactions

In recent years, Web of Science has published nearly one hundred reports per year on quinoxalin-2(1H)-ones, which have attracted great interest due to their wide applications in pharmaceutical and materials fields, especially in recyclable heterogeneous catalytic reactions for direct C–H functionalisation. This review summarises for the first time the methods and reaction mechanisms of heterogeneous catalytic reactions of quinoxalin-2(1H)-ones, including six major types of heterogeneous catalysts involved. The heterogeneous reactions of quinoxalin-2(1H)-ones are summarised by classifying different types of catalytic materials (graphitic phase carbon nitride, MOF, COF, ion exchange resin, piezoelectric materials, and microsphere catalysis). In addition, this review discusses the future development of heterogeneous catalytic reactions of quinoxalin-2(1H)-ones, including the construction of C-B/Si/P/RF/X/Se bonds by heterogeneous catalytic reactions, the enrichment of heterogeneous catalysts such as metal oxides, graphene-based composites, doped metal nanoparticles, and molecular sieve-based porous materials, asymmetric synthesis, and other areas. The aim of this review is to contribute to the development of green and sustainable heterogeneous reaction methods for quinoxalin-2(1H)-ones with applications in materials chemistry and pharmacology.
Tests of independence by bootstrap and permutation : an asymptotic and non-asymptotic study. Application to neurosciences.

On the one hand, we construct such tests based on bootstrap and permutation approaches. Their asymptotic performance are studied in a point process framework through the analysis of the asymptotic behavior of the conditional distributions of both bootstrapped and permuted test statistics, under the null hypothesis as well as under any alternative. A simulation study is performed verifying the usability of these tests in practice, and comparing them to existing classical methods in Neuroscience. We then focus on the permutation tests, well known for their non-asymptotic level properties. Their p-values, based on the delayed coincidence count, are implemented in a multiple testing procedure, called Permutation Unitary Events method, to detect the synchronization occurrences between two neurons. The practical validity of the method is verified on a simulation study before being applied on real data. On the other hand, the non-asymptotic performances of the permutation tests are studied in terms of uniform separation rates. A new aggregated procedure based on a wavelet thresholding method is developed in the density framework. Based on Talagrand's fundamental inequalities, we provide a new Bernstein-type concentration inequality for randomly permuted sums. In particular, it allows us to upper bound the uniform separation rate of the aggregated procedure over weak Besov spaces and deduce that this procedure seems to be optimal and adaptive in the minimax sens.
Improving the Wind Farm efficiency by simple means

Wake effects in wind farms are a major source of power production losses and fatigue loads on the rotors. It has been demonstrated that in large wind farms the only source of kinetic energy to balance that extracted by the turbines is the vertical transport of the free-stream flow kinetic energy from above the wind-turbine canopy. This chapter explores the possibility to enhance such process by introducing tethered kites in steady flight within a small wind-turbine array. In a first step, an array of four wind turbines, aligned with the streamwise velocity component, is simulated within the Large Eddy Simulation framework. The turbines are placed in a pre-generated turbulent atmospheric boundary layer and modelled as actuator discs with both axial and tangential inductions, to account for the wake rotation. The main part of the study considers an identical wind turbine configuration with kites suspended half the inter-turbine spacing distance. The kites are modeled as body forces on the flow, equal in magnitude and opposite in direction to the vector sum of the lift and drag forces acting on the kite surfaces. A qualitative comparison of the mean flow statistics, before and after the introduction of the kites is presented.
Drag reduction of circular cylinders by porous coating on the leeward side

The present paper describes the effect of drag reduction of circular cylinders due to a porous coating on their leeward sides. To investigate the coating effect, experiments were conducted in a wind tunnel of Goettingen type. Systematic drag measurements were carried out for different cylinder configurations and flow velocities. The drag measurements were complemented by pressure and particle image velocimetry (PIV) flow field measurements around selected cylinders. The Reynolds numbers were varied in the subcritical range of $3\times 10^{4}<Re<1.4\times 10^{5}$ . The results show that a thin porous layer on the leeward side, either incorporated in the cylinder shape or applied on the cylinder surface, leads to an increase of base pressure on the leeward side of the cylinder. It causes a reduction of drag and dampens oscillation amplitudes when compared to a cylinder without coating. Results obtained for different configurations with varying key parameters (coating angles, layer thicknesses and pore sizes of the porous material) clearly indicate the drag-reducing and amplitude-damping potential of leeward coating. The amount of drag reduction and amplitude damping depends on the combination of key parameters. It was demonstrated that the lowered drag coefficients $c_{d}$ were almost constant in the tested range of Reynolds numbers. A maximum reduction of drag of 13.2 % was measured. In addition, the results revealed a strong reduction of the pressure fluctuations around cylinders with a leeward coating due to the shift of the vortex region further downstream.
Prevention and Health Benefits of Prebiotics, Probiotics and Postbiotics in Acute Lymphoblastic Leukemia

Acute lymphoblastic leukemia (ALL) is the most common type of leukemia in children, comprising 75–85% of cases. Aggressive treatment of leukemias includes chemotherapy and antibiotics that often disrupt the host microbiota. Additionally, the gut microbiota may play a role in the development and progression of acute leukemia. Prebiotics, probiotics, and postbiotics are considered beneficial to health. The role of prebiotics in the treatment and development of leukemia is not well understood, but inulin can be potentially used in the treatment of leukemia. Some probiotic bacteria such as Lactobacillus shows anticancer activity in in vitro studies. Additionally, Bifidobacterium spp. , as a consequence of the inhibition of growth factor signaling and mitochondrial-mediated apoptosis, decrease the proliferation of cancer cells. Many bacterial metabolites have promising anticancer potential. The available research results are promising. However, more research is needed in humans, especially in the child population, to fully understand the relationship between the gut microbiota and acute leukemia.
Games and Strategies inside Elementary Logic

1 Logic and Games Connections between logic and games go back to Antiquity, and the first systematic interest in rules of rational debate. Argumentation is a kind of game, and improving one’s skills in winning arguments draws many students to the lecture halls of logic. Well-defined ‘logic games’ have been around since the 1950s, when Paul Lorenzen gave his pioneering analysis of argumentation as a two-person game between the proponent and opponent of some thesis under discussion – where validity of a thesis means that its proponent has a winning strategy against any opponent. By now, there are many logic games, for purposes of proof, semantic evaluation (Hintikka), model comparison (Ehrenfeucht), or model construction (Hodges), and the literature on the subject is growing quickly. Moreover, games related to logic games have become wide-spread in computer science. Despite this growing interest, the game-theoretic approach has not become an established ‘perspective’ in logic, the way ‘semantics’ or ‘proof theory’ are considered major modes of viewing validity and other logical key notions. The received opinion has it that logic games are a didactic tool, a useful handmaiden to syntax and semantics without independent interest. Moreover, they are mostly a facon de parler, as there are no substantial connections with the deeper mathematics of game theory as developed by Von Neuman/Morgenstern and Nash.
Measurement of Local Pulse Wave Velocity: Agreement Among Various Methodologies

The local pulse wave velocity (PWV) is the velocity with which the arterial pulse wave travels from the left ventricle to the vascular bed. Local PWV is clinically significant as a prognostic indicator of vascular damage. The measurement of local PWV involves several direct and indirect methods. However, there are limited studies that compare agreement among different methodologies. In this work, we investigated the agreement among several methods of measurement of PWV, such as the haemodynamic loop-based, Bramwell-Hill, transit-time-based and computational models of PWV. A small cohort of 35 participants (21male/14 female) aged between 21 and 51 years was recruited on voluntary consent. The measurement setup included duplex mode recording of carotid diameter and flow velocity waveforms from an ultrasound machine and simultaneous acquisition of dual-diameter waveforms and tonometry waveforms using an in-house developed bi-modal arterial probe. The carotid pressure waveform, flow velocity and dual diameter waveforms for evaluating the various methods of PWV measurement were obtained from the data processing. The group average value of PWV were obtained between 3.07±1.17m/s to 5.02±1.00m/s for various methods. The lowest and the highest group average PWV was reported using the haemodynamics-loop-based methods. There exists a strong and statistically significant correlation among PWV obtained using Bramwell-Hill equations and computational models (r>0.91, p<0.001), whereas a moderate and statistically significant correlation was observed between Bramwell-Hill and transit-time-based methods (r=0.67, p<0.001). The correlation was poor between Bramwell-Hill and loop-based methods (r~0.2, p<0.001). The study confirms the variations in the measurements in PWV using different methods and suggests their interchangeable usage is not advised.
DEVELOPING OF CONCEPTUAL CHANGE TEXTS (CCTs) BASED ON CONCEPTUAL CHANGE MODEL TO INCREASE STUDENTS’ CONCEPTUAL UNDERSTANDING AND REMEDIATE MISCONCEPTIONS INKINEMATICS

The main objectives of this research are to develop a valid and practical Conceptual Change Texts (CCTs) material related to Newtonian Mechanics and to test the influence of the CCTs in order to increase students’ conceptual understanding and overcome their misconceptions in the relevant topics. The research is divided in to two years comprising of three steps, namely 1) preliminary study, 2) design development, and 3) product testing. This article reports some result of the first year research for kinematics materials. The method for the first and the second steps are descriptive qualitative and development research, respectively. Based on the analysis of the preliminary data it is found the weakness of the basic and standard competencies for Newtonian Mechanics materials in Basic Physics 1 course and it has been changed from 7 to 9 standard competencies. It was also arranged essential material and found 9 common misconceptions in kinematics, namely velocity and acceleration are considered equal, position and velocity are considered equal, velocity is not as vector quantity, ego-centered reference frame, heavier objects fall faster, gravity increase as an object falls, acceleration differs along the trajectory of a projectile motion, an object thrown vertically upward from a linier moving object will land behind this moving object, and a bullet will not hit a target if the target falls down at the same time the bullet is fired. These findings are basis to develop the CCTs. It is developing the CCTs for kinematics comprises of: case, question(s), space to answer and reason, kinds of misconceptions, and explanation of the right concepts. The CCTs in turn can be utilized to improve learners’ conceptual understandings and to remediate their misconceptions toward the truer concepts in the Kinematics topics.
Measuring context-specific collectivism: The Metzian Ubuntu Inventory

Cultural values are often used to categorise groups, e.g. individualism versus collectivism. Often when cultural values are measured, etic scales are used without giving attention to cultural value nuances, e.g. different types of collectivism. An example of a nuanced cultural value is found in the interpretation of ubuntu as a context-specific presentation of collectivism in South Africa. In this article, which may be viewed as an instance of experimental philosophy, the concept of ubuntu will be introduced based on the work of the philosopher Thaddeus Metz by focusing on the distinct aspects of harmonious relationships of identity and solidarity. The theoretical basis was used to develop and validate the Metzian Ubuntu Inventory (MUI) with a sample of 316 respondents. This scale consists of nine items, and has reliability and validity in the South African context. In the conclusion, possible applications of the MUI are suggested.
Does Capital Account Liberalization and Foreign Banks Ownership Lead to Income Disparity? An Analysis of BRICS Economies

The purpose of the study is to evaluate the impact of capital account liberalization and foreign bank ownership on income inequality. In this study, we have analyzed BRICS countries. In this study, we have used an unbalanced panel dataset. The timeline was 1991-2020, and the BRICS countries (Brazil, Russia, India, China, and South Africa) were analyzed. To measure the data on capital account liberalization, we have used the KAOPEN index. We used income inequality as the independent variable in the study, and we measured it through Gini Coefficient. At the same time, the capital account liberalization is taken as the dependent variable and measured it through the KAOPEN index. The author analyzed per capita income, unemployment rate, inflation, and population growth as controlled variables. In robustness analysis, institutional quality variables such as corruption and government stability ratings were included. The study found that sustainable capital account liberalization and foreign banks ownership could help to reduce income inequality.
Analysis of Sandwich Panels with Formed Faces

The analysis of foam-filled sandwich panels with light gage, cold-formed metal faces is studied both experimentally and theoretically. Moments and shears affecting the core and those arising from the bending of the rigid faces are combined in the theory. Formulated as an ordinary second order differential equation, and using boundary conditions, expressions are developed for deflection and for flexural stresses in the faces and shear stresses in the core. Experimentally, four different sandwich panels were subjected to uniform loading on simple spans. Strain gages and deflection dials were used. Experimental and theoretical deflections and stresses are in reasonable agreement. Both approaches show a reversal of stresses along the profiles of the formed faces due to bending of such faces about their own centroidal axis, which indicates a plane section of such sandwich panel does not remain plane under bending. The theory is applicable to panels with either one or two formed face(s) and faces of different or the same materials. In case there is only one formed face, the other face is flat.
Effect of sodium lauroyl sarcosinate on the thermal, optical and moisture absorption properties of polyvinylpyrrolidone film

In the present study, polyvinylpyrrolidone films containing amino acid-based surfactant, namely, sodium lauroyl sarcosinate (SLS), were prepared by casting method. The obtained films (PVP/SLS) were characterized by means of attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), optical properties, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and moisture absorption (MA). ATR-FTIR spectra of PVP/SLS films showed the main bands of PVP. The opacity of PVP films increased with the addition of SLS. Furthermore, moisture absorption of PVP/SLS films were higher than the pristine PVP film. TGA curves displayed that the thermal stability of PVP film decreased after the incorporation of SLS. DSC curves indicated that SLS can be used as plasticizer for PVP.
On cell-centered multigrid methods and Local Fourier Analysis for PDEs with random coefficients

In this paper, we propose a, rather basic, cell-centered multigrid method for the robust and efficient solution of partial differential equations with random coefficients and for problems with jumping coefficients. The PDE studied describes a steady-state single-phase flow in a random porous medium. The excellent convergence of the method is supported by a non-standard local Fourier analysis, which is capable of accurately predicting the multigrid convergence for problems with random and jumping coefficients. Moreover, the information provided by this analysis helps us to estimate a-priori the time needed for solving uncertainty quantification problems by means of a multigrid multilevel Monte Carlo method.
Medical organization doctors and policy communities’ influence over Brazilian Health Workforce Policies

ABSTRACT This article aims to analyze the influence of medical doctors as social actors on developing a policy for the medical workforce in Brazil. The analysis focuses on the years following 2003, when a seeking to include this policy within the scope of the National Health System took office at the Ministry of Health and met with resistance from medical societies. The study adopted sources were process tracing methodology, documents, and interviews. It is based on a neo-institutionalist theoretical approach. Findings reveal long-standing stability (1960-2002) in the policy and its institutional arrangement under the policy community formed by Liberal Medicine advocates (LM-PC); a period (2003-2009) when a thwarted attempt at change by the Ministry of Health met with the opposition of the LM-PC; a period (2010-2016) when such stability was undermined, and the policy was changed despite the opposition of the LM-PC; and, finally, a period when stability was recovered favoring the policy mentioned above community again, reversing several previous changes. However, the LM-PC could not implement its propositions since it faced opposition from other actors influencing the policy. Stability tended towards reproducing the status quo.