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Volume 3 - Issue 12, December (2025)

All Articles
Original Article491 downloads
Recognition of Indigenous Foods and Edible Insects in Nutrition Programs of 16 Member States in the Southern African Development Community (SADC): A Program evaluation
DOI: https://doi.org/10.5281/zenodo.18073135
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Background: Communities in most countries of the 16-Member Southern African Development Community (SADC) eat insects including crickets, grasshoppers, cicadas, edible caterpillar, beetles, and locusts. They also consume wild animals including rabbits, mice, wild birds, reptiles like tortoises, and various types of indigenous vegetables to meet their nutritional needs. Methodology: Several options were utilized for the methodology: First, emails were sent to the national nutrition program officers in the 16 SADC countries; a follow-up second round of emails was sent to countries that did not answer to the first round. This was followed by telephone calls to the program officers as a crosschecking mechanism; a desk review of the national nutritional programs documents; and an internet Google search on the nutritional value of the insects and indigenous foods was done. Results: The emails, telephone calls and reviews of the national nutrition documents provided lists of indigenous foods recommended by some countries, common staple foods, and indigenous foods available in the SADC region. Deficiencies in minerals, vitamins, essential amino acids, micronutrients, and other food content in the staple foods of the communities cause most nutritional disorders in the SADC Region. Anaemia (iron deficiency), stunted growth (micronutrient deficiency), and skin lesions (vitamin deficiency) are some of the common manifestations of diseases caused by deficiencies in diets of the region. Conclusion: Most Member States in the SADC Region have communities that recognize edible insects and other indigenous foods as part of the food and feed. Studies show that these foods contain high nutritional values. This article recommends the inclusion of indigenous foods in national nutritional programs.
Original Article41 downloads
Sustaining Support in Remote and Hybrid Work Environments: Organizational, Leader, and Peer Perspectives
DOI: https://doi.org/10.5281/zenodo.18073141
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The expansion of remote and hybrid work following the COVID-19 pandemic has fundamentally reshaped how organizations support employees beyond traditional, office-based environments. While remote work has demonstrated benefits related to flexibility, productivity, and talent retention, it has also exposed gaps in organizational, leadership, and peer support structures that were not designed for distributed workforces. This viewpoint paper synthesizes existing research on remote and hybrid work to examine how organizational support, leader support, and peer support function in virtual work contexts and why these forms of support are critical for employee onboarding, development, engagement, and performance. Drawing on the perceived organizational support framework and recent empirical findings, the paper identifies persistent challenges faced by remote workers, including reduced social connection, uneven access to resources, communication breakdowns, and limited development opportunities. Building on this synthesis, the paper offers actionable recommendations for organizational leaders to sustain and strengthen support systems as remote and hybrid work become enduring features of the modern workplace. By integrating research across disciplines and translating it into practical guidance, this paper contributes to the growing body of literature on remote work, providing leaders with evidence-informed strategies to enhance employee experience and organizational effectiveness in the next phase of remote and hybrid work.

Original Article27 downloads
Predictive Optimization of Earthmoving Equipment Productivity in Civil Engineering and Oil Reservoir Protection Projects Using Digital Twins and Machine Learning
DOI: https://doi.org/10.5281/zenodo.20474255
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The construction industry, particularly in civil engineering and oil reservoir protection earthworks, continues to grapple with stagnant equipment productivity and rising pressure to decarbonize operations, yet traditional planning and reactive management approaches remain unable to leverage the high-frequency data now streaming from modern heavy machinery. This study addresses the critical gap between the growing digitization of construction assets and the lack of an integrated framework that converts real-time sensor data into predictive, multi-objective operational decisions for earthmoving tasks vital to oil reservoir safety infrastructure. A closed-loop decision framework is proposed that seamlessly fuses a synchronized equipment digital twin with a suite of machine learning models and a receding-horizon optimizer to simultaneously maximize earthmoving fleet productivity and minimize carbon emissions. The research was conducted on data from a four-week medium-scale earthmoving operation involving the construction of protective containment berms around oil storage reservoirs, employing two 20‑ton excavators, five articulated dump trucks, and a wheel loader, all instrumented with CAN bus loggers, hydraulic pressure sensors, inertial measurement units, and GNSS receivers generating over five terabytes of high-frequency time-series data. Digital twins for each machine were instantiated using multi-domain physics-based models, calibrated to field data, and continuously synchronized via an inverse dynamic’s payload estimation algorithm and a state detection engine. A total of 137 engineered features were extracted per work cycle, spanning temporal statistics, spectral signatures, and domain-specific ratios such as idle time ratio and hydraulic load factor, forming a 14,000‑cycle feature matrix. Five distinct machine learning architectures—extreme gradient boosting, random forest, deep neural network, long short-term memory network, and Transformer—were trained to predict productivity rate and fuel consumption, with log-transformed targets and strict time-series cross-validation. The extreme gradient boosting model achieved a coefficient of determination of 0.893 for productivity prediction on the hold-out test set, outperforming a static baseline (0.317) and a daily-aggregate naive model (0.612) by wide margins, while the long short-term memory network led fuel consumption prediction with an R² of 0.904. Feature importance analysis revealed that effective payload, idle time ratio, and hydraulic load factor accounted for over forty percent of predictive power, providing an actionable prioritization for instrumentation investments. The trained models were embedded as surrogate evaluators within a multi-objective Chebyshev-scalarized genetic algorithm that re-solved every minute over a ten-minute horizon, guiding throttle settings, bucket fill depth, and truck dispatch. In a 60-day simulated project, the integrated optimizer under equal productivity-emission weights moved 108,420 cubic meters of material and consumed 41,200 liters of fuel, simultaneously surpassing reactive dispatch by 9.8% in output and 4.4% in fuel efficiency. The Pareto frontier mapped across five weight configurations exposed a concave trade-off with a marginal emission cost of 1.98 kg CO₂ per additional cubic meter at the productivity extreme and a marginal sacrifice of 0.90 kg CO₂ saved per lost cubic meter at the emission extreme, a decision-support instrument without precedent in the literature. Robustness experiments with artificial sensor dropout rates up to fifty percent demonstrated only a 12.8% relative degradation in predictive accuracy for the gradient boosting model, and the optimizer maintained a cumulative output of 104,100 cubic meters under thirty percent dropout, still exceeding the full-data reactive strategy. These findings confirm all three embedded hypotheses: real-time digital twin data significantly enhances prediction accuracy; multi-objective optimization identifies superior productivity–emission trade-offs; and the integrated system exhibits field-grade resilience to data imperfections. The study provides a validated, computationally tractable blueprint for anticipatory equipment management that is ready for field piloting and scale-up in safety-critical earthworks such as oil reservoir containment berms, marking a decisive shift from descriptive monitoring toward predictive, self-optimizing construction operations.