Miracle-dz/UniFAR-FTUs huggingface dataset:
Work-Integrated Learning for Mining Engineering Training and the Employability Nexus in Traditional Research Universities

Globally, employability is increasingly becoming an issue of concern in higher education due to demands from the labour market requiring work-ready graduates. In the Global South, particularly South Africa, universities are on a quest to develop competence and improve student employability. This paper is set to investigate the impact of work-integrated learning on employability for mining engineering undergraduates in South Africa. The research data were collected using the mixed methods approach and a case study design. Experiential learning was used to examine the impact of work-integrated learning on the employability of mining engineering students. The findings provide a description of perspectives for mining engineers, lecturers, and workplace supervisors concerning the enhancement of employability for mining engineering students. The findings revealed that professional associations play a crucial role in the development of professional skills. This article argues for strong partnerships with industry partners to nurture the employability of mining engineering students.
Political Interaction Beyond Party Lines: Communication Ties and Party Polarization in Parliamentary Twitter Networks

A growing body of research has examined the uptake of social media by politicians, the formation of communication ties in online political networks, and the interplay between social media and political polarization. However, few studies have analyzed how social media are affecting communication in parliamentary networks. This is especially relevant in highly fragmented political systems in which collaboration between political parties is crucial to win support in parliament. Does MPs’ use of social media foster communications among parliamentarians who think differently, or does it result in like-minded clusters polarized along party lines, confining MPs to those who think alike? This study analyzes the formation of communication ties and the degree of homophily in the Dutch MPs’ @mention Twitter network. We employed exponential random graph models on a 1-year sample of all tweets in which Dutch MPs mentioned each other (N = 7,356) to discover the network parameters (reciprocity, popularity, and brokerage) and individual attributes (seniority, participation in the parliamentary commissions, age, gender, and geographical area) that facilitate communication ties among parliamentarians. Also, we measured party polarization by calculating the external–internal index of the mentions. Dutch MPs’ communication ties arise from network dynamics (reciprocity, brokerage, and popularity) and from MPs’ participation in the parliamentary commissions, age, gender, and geographical area. Furthermore, there is a high degree of cross-party interactions in the Dutch MPs’ mentions Twitter network. Our results refute the existence of “echo chambers” in the Dutch MPs’ mentions Twitter network and support the hypothesis that social media can open up spaces for discussion among political parties. This is particularly important in fragmented consensus democracies where negotiation and coordination between parties to form coalitions is key.
Functional Odd- and Branched-Chain Fatty Acid in Sheep and Goat Milk and Cheeses

The inverse association between the groups of odd-chain (OCFA) and branched-chain (BCFA) and the development of diseases in humans have generated interest in the scientific community. In experiment 1, the extent of the passage of odd- and branched-chain fatty acids (OBCFA) from milk fat to fresh cheese fat was studied in sheep and goats. Milk collected in two milk processing plants in west Sardinia (Italy) was sampled every 2 weeks during spring (March, April and May). In addition, a survey was carried out to evaluate the seasonal variation of the OBCFA concentrations in sheep and goats’ cheeses during all lactation period from January to June. Furthermore, to assess the main differences among the sheep and goat cheese, principal component analysis (PCA) was applied to cheese fatty acids (FA) profile. Concentrations of OBCFA in fresh cheese fat of both species were strongly related to the FA content in the unprocessed raw milk. The average contents of OBCFA were 4.12 and 4.13 mg/100 mg of FA in sheep milk and cheese, respectively, and 3.12 and 3.17 mg/100 mg of FA in goat milk and cheese, respectively. The OBCFA concentration did no differed between milk and cheese in any species. The content of OBCFA was significantly higher in sheep than goats’ dairy products. The OBCFA composition of the cheese was markedly affected by the period of sampling in both species: odd and branched FA concentrations increased from March to June. The seasonal changes of OBCFA in dairy products were likely connected to variations in the quality of the diet. The PCA confirmed the higher nutritional quality of sheep cheese for beneficial FA, including OBCFA compared to the goat one, and the importance of the period of sampling in the definition of the fatty acids profile.
Waste not, want not: Microsatellites remain an economical and informative technology for conservation genetics

Abstract Comparisons of microsatellites and single‐nucleotide polymorphisms (SNPs) have found that SNPs outperform microsatellites in population genetic analyses, questioning the continued utility of microsatellites in population and landscape genetics. Yet, highly polymorphic markers may be of value in species that have reduced genetic variation. This study repeated previous analyses that used microsatellites with SNPs developed from ddRAD sequencing in the black‐capped vireo source‐sink system. SNPs provided greater resolution of genetic diversity, population differentiation, and migrant detection but could not reconstruct parentage relationships due to insufficient heterozygosities. The biological inferences made by both sets of markers were similar: asymmetrical gene flow from source sites to the remaining sink sites. With the landscape genetic analyses, we found different results between the two molecular markers, but associations of the top environmental features (riparian, open habitat, agriculture, and human development) with dispersal estimates were shared between marker types. Despite the higher precision of SNPs, we find that microsatellites effectively uncover population processes and patterns and are superior for parentage analyses in this species with reduced genetic diversity. This study illustrates the continued applicability and relevance of microsatellites in population genetic research.
Predicting the loss to follow-up of HIV-infected patients on ART in a rural area in South Africa using generalized gamma distributions

Background - Long-term regular follow-up and high retention are the anticipated outcomes for the wellness and longevity of HIV/AIDS patients on antiretroviral treatment. However, these anticipated outcomes are marred by patient loss to follow-up (LTFU) which is currently exacerbated by the Covid-19 pandemic. This study aims to determine the prevalence and potential risk factors to LTFU among HIV/AIDS patients on ART at two rural district hospitals in South Africa.Methods— This is a retrogressive observational study whereby a cohort of HIV/AIDS patients was retrospectively followed from 2010 to 2017 until loss to follow-up occurred or until the end of the observation period at Carolina and Embhuleni hospitals. An institutional based retrospective cohort study was undertaken among children, adolescents and adults living with HIV/AIDS and attending ART clinic between January 1, 2010 and June 30, 2017. Loss to follow up was defined as not taking an ART refill for a period of 90 days or longer from the last attendance for refill and not yet classified as ‘dead’ or ‘transferred-out’ patient. Patient information was obtained from the routine hospitals’ records, and the data were analysed using Generalized gamma distribution to identify the predictors of loss to follow up among HIV/AIDS patients while Kaplan-Meier model was used to estimate and compare the LTFU survival probabilities of heterogenous groups among the patients.Results— Of the 357 patients, 60.5% were female. The mean (SD) age of the cohort was 36.2 (14.1), 15.4 (3.5), and 5.1 (3.5) years for adults, adolescents, and children, respectively. From 357 HIV/AIDS patients, 93 (26.05%) were lost to follow-up. Empirical results show that the Weibull distribution gives the best fit to the data. The Weibull model determined the Factors associated with significant risk factors to patient loss to follow up as: regimen EFV+D4T+3TC [HR: 2.0 CI;(1.3–3.1)], regimen EFV+AZT+3TC [HR: 2.9 CI;(1.3–6.4)], regimen EFV+3TC+TDF [HR: 10.0 CI;(3.9–25.9)], regimen NVP+3TC+TDF [HR: 10.6 CI;(1.8–62.4)], follow up CD4 [HR: 1.0 CI;(1.0–1.0)], log(follow up viral load) [HR: 0.8 CI;(0.7–0.9)], marital status (married) [HR: 0.4 CI;(0.3–0.8)], marital status (cohabitation) [HR: 0.6 CI;(0.3–0.9)], ART adherence (fair) [HR: 2.4 CI;(1.3–3.4)], ART adherence (good) [HR: 4.6 CI;(2.2–9.5)] and age [HR: 1.02 CI;(1.0–1.04)]. Discussion— Effective control and tracing measures in the at-risk population and in defaulters need to be stepped up especially during this COVID-19 period, to improve retention in hospitals. There is also need for careful adherence counseling and assessment of medication supplies.Conclusion— LTFU is more pronounced among females and is highest among adolescents. Patients with increased risk for LTFU were consistent with ART regimens, viral load, age, CD4 count, adherence and marital status.
A clinicopathological study of non-malignant lesions of the larynx

The study was undertaken to identify the type of laryngeal lesions, the age, sex distribution, symptomatology, sites of involvement, conservative and surgical management, histopathological analysis and outcome of the same. This is a prospective study conducted at a tertiary care centre for one and a half years. A total of 20 patients were included based on symptomatology such as hoarseness of voice, foreign body sensation, throat pain, and respiratory distress. All malignant cases were excluded. Hematological and radiological investigations, along with microlaryngoscopic procedures followed by histopathology, were employed. A male preponderance with an M: F ratio of 3:2 was observed. The majority of the patients were in the age group of 30 to 45 years. Vocal cord polyps were observed to be the commonest type of the lesion. A case of a bilobed concomitant tonsillar cyst of the larynx was the rarest encountered. In this study, hoarseness of voice, cough, foreign body sensation, and throat pain proved to be the commonest symptoms. Early diagnosis with routine clinical examination aided by radiological investigation such as contrast enhanced computed tomography (CECT) has proven to be useful in suspicious lesions of the larynx. Micro laryngeal surgery, voice rest, and postoperative speech therapy together offer a cost-effective and safe method for the management of benign laryngeal lesions.
The recent increase in central eastern China summer rainfall and its possible mechanism

Abstract This study investigated interdecadal variations in summer rainfall in central eastern China before and after the mid-1990s. The mean difference in rainfall between the two epochs (average rainfall in the 1981–1995 period: 5.0 mm day−1; average rainfall in the 1996–2010 period: 6.0 mm day−1) was significant at the 95% confidence level. This study explored the cause of the recent increase in summer rainfall in central eastern China by analyzing the difference in average rainfall between 1996–2010 (hereafter, Epoch II) and 1981–1995 (hereafter, Epoch I). Analysis of rainfall revealed that positive anomalies were observed in a southwest–northeast direction across the south-central region of eastern China, Korea, and Japan, while negative anomalies were observed at latitudes of 40–50°N and in most areas in the western North Pacific region. These findings suggest that summer rainfall in central eastern China is part of East Asian summer monsoons and have an out-of-phase relationship with western North Pacific monsoons. To identify the cause of the recent increase in summer rainfall in central eastern China, the difference in 850 hPa stream functions between Epoch II and Epoch I was analyzed. This study found that anomalous huge anticyclonic circulations were strengthened in the western North Pacific region and anomalous cyclonic circulations were strengthened in the south-central region of eastern China. As a result, anomalous northeasterlies originating from anomalous cyclones centered on Lake Baikal and anomalous southerlies originating from anomalous cyclones in the south-central area of eastern China joined in central eastern China. The typical anomalous atmospheric circulations in the negative Pacific Decadal Oscillation (PDO) phase and the average PDO index and summer rainfall in central eastern China from June to August exhibited a high negative correlation, which was presumed to have been present since the previous winter.
Influence of Data Splitting on Performance of Machine Learning Models in Prediction of Shear Strength of Soil

The main objective of this study is to evaluate and compare the performance of different machine learning (ML) algorithms, namely, Artificial Neural Network (ANN), Extreme Learning Machine (ELM), and Boosting Trees (Boosted) algorithms, considering the influence of various training to testing ratios in predicting the soil shear strength, one of the most critical geotechnical engineering properties in civil engineering design and construction. For this aim, a database of 538 soil samples collected from the Long Phu 1 power plant project, Vietnam, was utilized to generate the datasets for the modeling process. Different ratios (i.e., 10/90, 20/80, 30/70, 40/60, 50/50, 60/40, 70/30, 80/20, and 90/10) were used to divide the datasets into the training and testing datasets for the performance assessment of models. Popular statistical indicators, such as Root Mean Squared Error (RMSE), Mean Absolute Error (MAE), and Correlation Coefficient (R), were employed to evaluate the predictive capability of the models under different training and testing ratios. Besides, Monte Carlo simulation was simultaneously carried out to evaluate the performance of the proposed models, taking into account the random sampling effect. The results showed that although all three ML models performed well, the ANN was the most accurate and statistically stable model after 1000 Monte Carlo simulations (Mean R = 0.9348) compared with other models such as Boosted (Mean R = 0.9192) and ELM (Mean R = 0.8703). Investigation on the performance of the models showed that the predictive capability of the ML models was greatly affected by the training/testing ratios, where the 70/30 one presented the best performance of the models. Concisely, the results presented herein showed an effective manner in selecting the appropriate ratios of datasets and the best ML model to predict the soil shear strength accurately, which would be helpful in the design and engineering phases of construction projects.
The More, the Merrier? - How Adding and Removing Game Design Elements Impact Motivation and Performance in a Gamification Environment

ABSTRACT Gamification became a well-established technique by implicating game design elements into applications, activities, and services. We investigate the impact of the amount of game design elements on motivation and performance in cognitive tasks by adding and removing game design elements. We manipulated the amount of game design elements in three online experiments (N = 440), both between-subjects as well as within-subjects in a repeated measure design. Results suggest that more game design elements provide higher benefits for motivation and performance. A curvilinear relationship suggests a potential threshold of game design elements, which has to be met for gamification to become effective. Removing game design elements from the ongoing task did not result in a decline of performance. Based on Self-Determination theory, results indicate toward competence and relatedness being core mechanics underlying the positive effects of gamification. We conclude that a high amount of game design elements benefits motivation and performance.
Studies on alkaline activation of BF, steel and alloy slags

L'activation de laitiers d'origines diverses par differents composes, tels que le gypse, Ca(OH) 2 , le carbonate de sodium, le silicate de sodium, et l'hydroxyde de sodium montre que NaOH confere un maximum d'activite hydraulique aux laitiers. Des resistances presque egales a celles du ciment Portland ordinaire sont observees a 3 et 7 jours. L'activation des melanges laitier-cendres volantes obeit au meme comportement
STUDENTS' PERSPECTIVES OF ONLINE LANGUAGE LEARNING DURING CORONA PANDEMIC: BENEFITS AND CHALLENGES

This study aimed to elicit students' perspectives towards benefits and challenges of fully online classes at Hebron University. The researchers examined both advantages and challenges of online classes from students' point of view. Also, they explored some suggestions for improving online classes which could play an important role in improving the online learning and teaching process. The researchers employed both quantitative and qualitative methods. They distributed a questionnaire to collect data. Eighty two students from two different English intensive courses were asked to fill a 5 point Likert scale questionnaire and answer four open-ended questions. The researchers used the surveyplanet app to facilitate the process of distributing and collecting data. The finding of this study showed that students faced some challenges with online learning; they preferred face to face classes. The disadvantages of online classes from their perspectives are more than the advantages. The weak internet connectivity, poor interaction, less motivation, less participation and less understanding are the most challenges of online learning. However, they find online classes easy to access, convenient and easy to be reviewed for exams. Keywords: Online learning; advantages; challenges
The Nonlinear Relation between Institutional Ownership and Environmental, Social and Governance Performance in Emerging Countries

This paper examines how the level of institutional ownership affects environmental, social, and governance (ESG) performance in emerging countries by jointly investigating a nonlinear relationship. By examining an international sample composed of 17,318 firm–year observations from the period 2012–18 for 16 emerging countries, our findings reveal that the ESG performance of firms located in emerging countries depends on the level of influential institutional ownership, and displays a U-shaped relation, particularly for environmental disclosure. Institutional investors with low ownership are less likely to promote higher ESG performance in emerging countries, although this effect is attenuated when institutional ownership reaches a significant percentage, constituting a critical mass.
Investigation of Groundwater Contamination from Septic Tank Siting in Umungasi/Abayi, Abia State

The investigation of groundwater contamination from septic tank siting was done in Umungasi/Abayi, Abia State. The aim of this study was to investigate the effect of siting septic systems on the quality of groundwater in Umungasi, Abayi, Aba. Twenty (20) water samples were randomly collected from boreholes located less than 30 m away from septic systems in Umungasi, Abayi Aba, Nigeria to determine their physico-chemical and heavy metals characteristics. While three (3) water samples at distances ranging from 60 m from the nearest septic system were sampled for analyses as controls. Standard analytical techniques were employed in the investigation. The result showed that most of the physicochemical parameters analysed in the borehole water samples were within the WHO/SON/NAFDAC recommended limits except for pH in BH4 and BH7 which had values of 6.3 respectively and were not within the WHO/SON/NAFDAC standard limit of 6.5-8.5. Some of the heavy metals analysed during the period of study were within the permissible limits except for iron in BH5 (0.443 mg/L), BH7 (0.367 mg/L), BH8 (0.511 mg/L), BH9 (0.31 mg/L), BH15 (0.41 mg/L), BH16 (0.327 mg/L), BH17 (0.337 mg/L) and BH18 (0.315 mg/L) that were above the permissible limits of WHO standards of 0.3 mg/l. There was no influence of septic tank siting to the boreholes on groundwater quality during the period of study even though the distance of septic tanks from boreholes in the areas investigated did not conform with that recommended by WHO of 30 – 40 m. The contamination is from the general unhygienic condition of the environment.
COX-2 “Cyclooxygenase 2“as a Prognostic marker in Breast Cancer

Background: Breast cancer is the most commonly diagnosed cancer and the leading cause of cancer death among women in both developed and developing countries. Globally, the incidence rate of breast cancer has been rising rapidly over the past few decades.Cycloxygenase-2 (COX-2) regulates tumor growth, invasion and metastasis in breast cancer. Objective: The objective of our study is to evaluate COX-2 expression in breast cancer as a poor prognostic factor. Methods: Formalin-fixed and paraffin-embedded tissue blocks were studied for COX2 expression by immunohistochemistry in 100 patients diagnosed as breast carcinoma. The relationship between COX-2 expression and various clinico-pathological parameters was studied. Results: The results of our study suggest an association of the expression of COX-2 to the poor prognostic factors in breast cancer, such as larger tumor size, positive lymph node status, higher T stage and N stage as studying the association between Cox-2 protein expression and different clinco-pathologic features revealed that larger tumor size (> 5) and lymph node metastasis showed statistical significant association with Cox2 protein expression (p = 0.014 and p = 0.031, respectively). While rest of clinicopathologic features such as age, stage, hormonal receptor status, HER2/NEU and histopathological features showed no statistical significant association. Conclusion: Our study established the role of COX-2 in carcinogenesis and its association with adverse prognostic factors.
Pothole 3D Reconstruction With a Novel Imaging System and Structure From Motion Techniques

Machine vision based evaluation systems are receiving increased attention, day by day, for automated quality inspection of roads. Industrial pavement scanners consist of laser scanners and are very expensive, hence inaccessible for everyone. The proposed work presents a simple and novel approach for 3D reconstruction of potholes for an automated inspection and road surface evaluation. The technique utilizes a Structure from Motion based 3D reconstruction algorithm, along with laser triangulation, to generate 3D point clouds of potholes. Alongside, a novel low-cost system, consisting of a single camera and a laser pointer, is also proposed. Keypoint matching techniques are employed, with the 5-point algorithm, on successive image frames to generate a point cloud. However, this point cloud is not metric yet, without scale information. The scale ambiguity is solved by making use of the laser pointer, and using the principle of triangulation. The laser spot is also detected in the same image sequence that is used for point-cloud building, cutting down the image capturing and processing overhead. The system has been benchmarked on artificial indentations with known dimensions, proving the robustness of the measurement scheme and hardware. Static and dynamic tests have been performed. The mean depth errors for measurement made by the imager statically and at dynamic speeds of 10 km/hr, 15 km/hr, and 20 km/hr are 5.3%, 7.9%, 14.4%, and 26.6%, whereas for perimeter the errors are 5.2%, 6.83 %, 11.8%, and 27.8%. The proposed, low-cost technique shows promising results in generating 3D point clouds for potholes.