Miracle-dz/UniFAR-FTUs huggingface dataset:
Removal and separation of mixed ionic dyes by solvent extraction

To reduce environmental pollution from dyeing wastewater, reverse micelles were prepared and used for the removal and separation of anionic Color Index (CI) Reactive Yellow 3 and cationic CI Basic Red 14 in mixed dye aqueous solution. The effect of the amount of dye and surfactant on removal rates of dyes was investigated. An ion-exchange reaction model was used to fit the experimental data. Ultraviolet-visible absorption spectra were employed to evaluate the state of dyes in mixed dye aqueous solution during the removal process. In addition, the removed dyes were recovered by back extraction and reused for dyeing fabrics. The results obtained indicated that the removal of dyes was increased with increasing the amount of surfactants, while the dye concentration exhibited the reverse trend. The dye extraction process could be described by the ion-exchange reaction equations. The mixed dyes could be removed and separated for the attractive force between dyes and the counter ionic surfactant. The mixed dyes were separated and recovered, which exhibited a good dyeing property.
Conférences à distance, oui mais

La crise sanitaire a bouleverse l’organisation et les pratiques du travail dans de nombreux de secteurs d’activite (Gode et al , 2020) Le monde universitaire n’a pas ete en reste En urgence, nos enseignements ont du etre dispenses en mode 100% a distance des le debut du confinement Nos pratiques de chercheurs ont egalement ete concernees, meme si la pleine digitalisation n’a pas forcement ete vecue comme un bouleversement dans tous les domaines En effet, collaborer a distance sur des projets de recherche ou sur l’ecriture d’articles etait deja notre quotidien, bien avant la Covid-19 En revanche, il n’en est pas de meme pour la participation a des conferences scientifiques © ESKA Tous droits reserves pour tous pays
Transport properties of copper with excited electron subsystem

We have investigated transport properties of an electron subsystem of copper heated by a femtosecond laser pulse. These properties change greatly in comparison with the room temperature solid metal. The electron temperature and pressure profiles significantly depend on these properties in bulk laser targets according to the two-temperature (2T) model. These profiles at the 2T stage are responsible for shock and rarefaction waves' formation. We have developed the analytical model of electroconductivity and heat conductivity of copper which takes into account changes of density, electron and ion temperatures. The model is based on the solution of the Boltzmann equation in the relaxation time approximation for consideration of electron collisions. Also we have carried out the first-principles calculations using the Kubo-Greenwood theory, methods of pseudopotential and linear augmented plane waves which are necessary to evaluate electron wavefunctions. We have provided the check of convergence of all parameters of our first-principles calculations. The results of our analytical model for electro- and heat conductivities are in good agreement with the data obtained using the linearized augmented plane wave (LAPW) method.
Effect of extrusion cooking on the physical and functional properties of wheat, rice and fababean blends

The effects of feed moisture, barrel temperature and screw speed on the physical, functional and structural properties of wheat four/fababean flour (W/F) and rice four/fababean protein concentrate (R/FP) blends were investigated on a Brabender single screw laboratory exrtruder. Within the range of moistures tested, increasing the feed moisture level reduced the torque reading in the barrel significantly. However, the higher feed moisture level reduced the expansion, density, product appearance and water solubility index (WSI) of W/F extrudates
C-Shaped Root Canal System– A Review of Literature

Proper diagnosis, treatment planning and thorough knowledge of the root canal system morphology and its possible variations are essential for the successful outcome of the endodontic treatment. The aim of this literature review is to describe the incidence of one of the possible variations of the root canal system anatomy – the C-shaped root canal configuration, when analyzed by CBCT. A review of related articles and studies was conducted in order to summarize the incidence and possible diagnostics of this variation. Knowledge of the C-shaped canal configuration is essential for proper management of cases. the frequency of the C-shaped root canal configuration. The not proper identification of this variation of the root canal system morphology can lead to poor preparation and obturation of the root canal. The identification of this variation using CBCT in vivo can significantly enhance the quality of the performed endodontic treatment and can decrease the risk of endodontic mishaps.
Perception of flood waste management among stakeholders in Kelantan

Objective: The purpose of this study is to determine the perception of stakeholder regarding the post-flood waste management system among the stakeholder authority. Methodology: This is a qualitative study and using in-depth interview. Results: The participants are officers involved in post flood from district council, SWCorp and Alam Flora. Among the criteria taken into consideration during the selection of respondents is having experience in flood waste management and involve in managing problematic areas. Conclusion: Researcher determined theme on severity of flood, waste collection, factors of failures and suggestion for improvement.
Experimental and Computational Investigation of Shaped Film Cooling Holes Designed to Minimize Inlet Separation

Film cooling is used to protect turbine components from the extreme temperatures by ejecting coolant through arrays of holes to create an air buffer from the hot combustion gases. Limitations in traditional machining meant film cooling holes universally have sharp inlets which create separation regions at the hole entrance. The present study uses experimental and computational data to show that these inlet separation are a major cause of performance variation in crossflow fed film cooling holes. Three hole designs were experimentally tested by independently varying the coolant velocity ratio (VR) and the coolant channel velocitty ratio (VRc) to isolate the effects of crossflow on hole performance. Leveraging additive manufacturing technologies, the addition of a 0.25D radius fillet to the inlet of a 7-7-7 shaped hole is shown to significantly improve diffuser usage and significantly reduce variation in performance with VRc. A second AM design used a very large radius of curvature inlet to reduce biasing caused by the inlet crossflow. Experiments showed that this “swept” hole design did minimize biasing of coolant flow to one side of the shaped hole and it significantly reduced variations due to varying VRc. RANS simulations at six VR and three VRc conditions were made for each geometry to better understand how the new geometries changed the velocity field within the hole. The sharp and rounded inlets were seen to have very similar tangential velocity fields and jet biasing. Both AM inlets created more uniform, slower velocity fields entering the diffuser. The results of this paper indicate large improvements in film cooling performance can be found by leveraging AM technology.
Reduced Ejection Fraction and Augmented Right Atrium are Independent Risk Factors of Deep Regional CBF in Cerebral Small Vessel Disease

Background: Systemic cardiac hypoperfusion is a well-acknowledged contributor to ischemic leukoencephalopathy. However, it has remained elusive how atherosclerosis-mediated cardiac remodelling modifies cerebral perfusion homeostasis as well as neuroimaging burden in cerebral small vessel disease (CSVD) development. Methods: This retrospective study identified 103 CSVD patients (CSVD burdenlow 0~1, n=61 and CSVD burdenhigh 2~4, n=42) from Sep. 2017 to Dec. 2019 who underwent transthoracic echocardiography(n=81), structural magnetic resonance imaging and arterial spin labelling. Total CSVD burden was graded according to the ordinal “small vessel disease” rating score (0-4). We investigated the univariate and multivariate linear regression of mean deep regional cerebral blood flow (CBF) as well as logistic regression analysis of CSVD burdenhigh. Results: Augmented right atrial diameter (B coefficient, -0.289; 95% CI, -0.578 to -0.001; P=0.049) and decreased left ventricular ejection fraction (B coefficient, 32.555; 95% CI, 7.399 to 57.711; P=0.012) were echocardiographic parameters linked with declined deep regional CBF in CSVD patients. Binary logistic regression analysis demonstrated decreased mean deep CBF (OR 0.894; 95% CI 0.811-0.985; P=0.024) was independently associated with higher CSVD burden after adjusted for clinical confounders. Multivariate receiver operating characteristics curve combing clinical risk factors, mean deep CBF and echocardiographic parameters showed predictive significance for CSVD burdenhigh diagnosis (area under curve=84.25%, 95% CI 74.86% - 93.65%, P<0.0001). Conclusion: The interrelationship of “cardiac -deep regional CBF-neuroimaging burden” reinforces the importance and prognostic significance of echocardiographic and cerebral hemodynamic assessment in CSVD early-warning.
Mediating Effect of Intention on Attitude to Academic Dishonesty among Undergraduate Students in Public Universities in Ghana

the Abstract: The study was designed to ascertain the mediating effect of intention on attitude toward academic dishonesty among students in public universities in Ghana. The study adopted the survey-inferential design to randomly sample the views of 1,200 university students by structured questionnaire. Pearson Correlation Coefficient and Structural Equation Modelling (SEM) were used for the analyses. It was ascertained that the mediating role of intention produced an indirect effect on attitude to academic dishonesty which was significant. It was concluded that an increase in intention to commit academic dishonesty will lead to an increase in academic dishonesty behaviour. It is recommended that university authorities enforce the rules and regulations against academic dishonesty fully without fear or favour. There should be no sacred cows, all offenders who might condone and connive the menace should be severely punished.
Effects of Bioaerosol Aerodynamic Size on Biodiversity in Three Kindergartens in Taiwan

Background: Human-associated bacteria (HAB) in the microbiome can become airborne bacterial aerosols (bioaerosols). The aerodynamic sizes of bioaerosols demonstrated may significantly affect their behaviors, respiratory deposition and biodiversity.Methods: The bacterial size, biodiversity and the HAB were evaluated at three kindergartens in central Taiwan in winter and spring. Kindergartens A, B, and C were in urban, semi-urban, and rural areas, respectively. A six-stage viable Andersen cascade impactor was used to collect bioaerosols and to determine their size distributions. A BD Phoenix-100 automated interpretation system was used to identify the species in those bioaerosols. The uniformity transformation was applied to verify the distributions of bacterial concentrations in different sampling rounds.Results: The results revealed 1,425 colonies (97.6%) that corresponded to 63 species in 29 genera and 35 colonies (2.4%) that were unidentified. The most abundant phylum was Actinobacteria (56.6+22.2%), Staphylococcus spp. was found in all sampling rounds, with a range of abundance between 2.0 and 70.0%. In all rounds, the geometric mean diameter of the bioaerosol and the geometric standard deviation of the bioaerosol size ranged from 2.19 to 5.42 µm and from 1.66 to 2.70, respectively. The Shannon diversity (H) and inverse Simpson diversity index (D) of the bioaerosols at each kindergarten were positively correlated with bioaerosol size, as larger bioaerosols had higher values of the biodiversity metrics. The Pearson correlations of H with the urbanization of the area of the kindergarten, temperature, RH and CO2 concentration were statistically significant (P < 0.05), indicating that the environmental variables and biodiversity covaried. The biodiversity in the rural area exceeded that in the urban area. Multiple and stepwise regression revealed that bioaerosol size was statistically significant with H (P = 0.001) and D (P = 0.002). The study may improve our understanding of the mechanisms and epidemiological spread of airborne infections.
Chromium(III) recovery from tanning wastewater by adsorption on activated carbon and elution with sulfuric acid

Chromium(III) recovery from tanning wastewater by means of adsorption on activated carbon and elution with sulfuric acid was studied. Tests were carried out at laboratory scale on an effluent of industrial origin. Initially, proteinaceous materials and fats were separated via sieving followed by ultrafiltration. The chemical composition of the sample thus precleansed was (in g/L): 1.09 chromium(III); 10.36 sulfate; 11.10 sodium; 9.57 chloride; 0.40 proteinaceous materials; and 0.20 fats. Adsorptions were made at 20, 30, and 40°C, establishing what temperature favored chromium(III) uptake. At 40°C, the maximum cation fixation was 40.2 mg/g, and the lowest content in an equilibrium solution was 3.9 mg/L. As regards sodium, chloride, and sulfate, the concentrations before and after the treatment were similar. Likewise, it was found that protons were also retained, modifying the pH of the liquid medium. Adsorption isotherms were analyzed using the Langmuir, Temkin, and Freundlich models. Finally, the extraction of the adsorbed tanning agent with sulfuric acid was evaluated. A recovery of 96.5% was achieved with 0.9 N at 70°C (13.23 g/L Cr 3+ ; 42.98 g/L sulfate; and 0.40 g/L NaCl).
Effect of using wall media and students’ learning styles on volleyball lower passing abilities of tenth-grade students

This study aims to investigate the effect of using walls as media and learning styles on ability to pass of the tenth-grade students’ ability of SMAK Suropati Sidoarjo and SMA Santo Yusup Surabaya. A total of 120 tenth-grade students of both high schools were the study subjects devided into the experimental and control groups. A pre-test post-test design randomnized control group design was employed. To collect the data, the volleyball passing tests were taken by the students. A two-way ANOVA and tests of homogeneity and normality were used to analyze the data. The results showed that the significant test results accepted the alternative hypothesis. It means that there was a significant effect and no interaction training using the wall vs. non-walls as media and learning styles on the lower pasing ability of the tenth-grade students of SMAK Suropati Sidoarjo and SMA Santo Yusup Surabaya.
Demographic and Psychosocial Determinants of Life Satisfaction Among Youths in Nigeria: Evidence from the Multiple Indicators Cluster Survey

Subjective Wellbeing, implying an evaluation of one’s life has recently received intellectual attention, especially in developed countries. Measuring this concept entails both an effective and cognitive evaluation of life. Life satisfaction plays a vital role in positive life outcomes as a key part of the cognitive component of subjective wellbeing. Various factors could determine the current state of wellbeing on an individual. Leveraging on one of the surveys that collect data on subjective wellbeing in Nigeria, we examined the determinants of life satisfaction among youths in Nigeria, with a concentration on the demographic and psychosocial factors. Multiple Indicator Cluster Survey (MICS) data for Nigeria (n = 18,454) was analyzed using chi-square tests and binomial logistic regression in Stata 14. The result showed that gender, residence, and region significantly determined life satisfaction. For psychosocial factors influencing life satisfaction; health, family life satisfaction, friendship, treatment by others, and perceived improvement in comparison to last year, significantly determine life satisfaction. Specifically, male resident in rural areas of Nigeria were more likely to report satisfaction with life. Further, youths that reported satisfaction with family life were more likely to be satisfied with life in general, while satisfaction with health, friendships, treatment by others, and improved condition from last year influenced satisfaction with life. In conclusion, it has been shown that beyond the socio-demographic factors, psychosocial determinants play vital roles in determining life satisfaction among youths. It is therefore imperative that government agencies consider policies and interventions that address psychosocial support for youths in Nigeria.
Preparation and characterization of carbon nano-onions by nanodiamond annealing and functionalization by radio-frequency Ar/O2 plasma

ABSTRACT Carbon nanomaterials can be prepared by several methods having in common that need a carbon source and often require high energies. In this study, we report the synthesis and characterization of carbon nano-onions by annealing of commercially available nanodiamonds and explore for the first time their functionalization with a radio frequency Ar/O2 plasma. Heat treatment of nanodiamonds at 1200°C for 6 hours under argon atmosphere afforded small spherical carbon nano-onion particles of 3–4 nm diameter and 5–6 graphitic shells. The prepared CNOs were visualized by HRTEM and showed the characteristic XRD and Raman features. The results have been compared with a sample prepared by annealing at 1600°C. Plasma functionalization in Ar/O2 atmosphere was used to introduce oxygen moieties into the surface of synthesized CNOs. X-ray photoemission spectroscopy showed that oxygen-containing groups like C─O, C═O and O─C═O were introduced on the surface of CNOs, a process that is accompanied by a surface reorganization as evidenced by the change of ID/IG ratios in the Raman spectra, indicating a conversion of sp2 to sp3 as a result of functionalization in the surface of CNO.
Green algae Chlorella vulgaris cultivation in municipal wastewater and biomass composition

AbstractThis paper deals with the accumulation of lipids, carbohydrates and proteins in the biomass of the green algae Chlorella vulgaris that is cultivated in the municipal wastewater of Vilnius City. The growth rate of the culture on different chemical compositions of media was investigated. Dependence of lipid, carbohydrate and protein content on total phosphorus and nitrogen initial concentrations in wastewater and removal of nutrients was investigated. Data showed that the higher amount of total nitrogen is the main factor leading to a higher rate of biomass increase. The study showed that Chlorella vulgaris is capable of very efficient nutrient removal from wastewater (up to 86% of total nitrogen and 87% phosphorus was removed). Data showed that there is strong correlation between the initial concentration of nitrogen, and in some cases phosphorus, in the media and content of proteins and carbohydrates in the biomass. A higher amount of nitrogen in the starting media leads to a higher amount of prot.
Influence of organic and inorganic fertilizer levels on growth and yield of dual purpose K12 sorghum (Sorghum bicolor) under irrigated condition

Field experiment was conducted at Agricultural College and Research Institute, Killikulam during rabi season (October 2019 - January 2020) to find out the suitable organic manures and level of fertilizers on the growth and yield of dual purpose K12 sorghum (Sorghum bicolor) under irrigated condition. The experiment was laid out in split plot design and replicated thrice. The main plot consists of four different organic manures namely FYM @12.5 t ha-1, poultry manure @ 5.0 t ha-1, vermicompost @5.0 t ha-1 and composted pressmud @ 3.0 t ha-1. In sub plots 75%, 100%, 125% recommended dose of fertilizers was applied along with absolute control (without fertilizer). Observation on plant growth parameters like plant height and dry matter production was recorded at 30, 60 DAS and at harvest. The grain yield and stover yield was also recorded. The experimental result shows that application of poultry manure @ 5 t ha-1 with 125% recommended dose of NPK recorded significantly higher plant height (307.3cm), dry matter production (19635 kg ha-1), grain (4589 kg ha-1) and stover yield (15711 kg ha-1).
Use of Borehole Seismometers in Earthquake Monitoring at the Baribis Fault Leading to Jakarta, Western Java

The region of Jakarta and its vicinity is one of the least understood geological domains in Java Island, Indonesia. Yet, the region is one of the few places which are often impacted by earthquakes from the Indo-Australian Plate subduction zone as well as on land active faults. In this study, a borehole seismic experiment was designed to unravel the seismic activity of the Baribis Fault, which continues and leads to Jakarta. This passive source experiment was composed of seven broadband instruments that extended across the Jakarta region and surrounding areas. The experiment recorded seismic data from the end of July 2019 to August 2020. We located 91 events of hypocenter location determination of the data recording; one event was located closely to the Baribis Fault line that continues to Jakarta and was felt in Bekasi (Southeast of Jakarta) at up to II-III on the Modified Mercalli Intensity (MMI) scale. The focal mechanism solution of this event shows an oblique thrust fault type. This event is evidence that the Baribis Fault is active.
Assessment of Implant Surface Changes due to instrumentation with different tips for ultrasonic-driven debridement

Background To assess the changes of implant surfaces of different roughness after instrumentation with ultrasonic-driven scaler tips of different materials. Methods Experiments were performed on two moderately rough surfaces (I – Inicell® and II – SLA®), one surface without pre-treatment (III) and one smooth machined surface (IV). Scaler tips made of steel (A), PEEK (B), titanium (C), carbon (D) and resin (E) were used for instrumentation with a standardized pressure of 100 g for ten seconds and under continuous automatic motion. Each combination of scaler tip and implant surface was performed three times on 8 titanium discs. After instrumentation roughness was assessed by profilometry. Morphological changes were assessed by scanning electron microscopy, and element distribution on the utmost surface by energy dispersive X-ray spectroscopy. Results The surface roughness of discs I and II were significantly reduced by instrumentation with all tips except E. For disc III and IV roughness was enhanced by tip A and C and, only for IV, by tip D. Instrumentation with tips B, D and E left extensive residuals on surface I, II and III. The element analysis of these deposits proved consistent with the elemental composition of the respective tip materials. Conclusion Instrumentation by ultrasonic-driven tips changes implant surfaces of different roughness significantly. The least change of implant surfaces might result from resin or carbon tips on machined surfaces.