African Transportation Engineering
type: channel
description: African Transportation Engineering is a peer‑reviewed scholarly journal published under the Pan‑African Research Journals (PARJ) platform, advancing African‑centred and global research.
language: en
publication name: African Transportation Engineering
items: Multilevel Regression Analysis to Evaluate Adoption Rates of Water Treatment Facilities in Senegal
items: Bayesian Hierarchical Model Assessment for Yield Improvement in Rwanda's Process-Control Systems
items: Time-Series Forecasting Model Replication for Municipal Infrastructure Asset Efficiency in Ghana,
items: Hierarchical Bayesian Modelling for Cost-Effectiveness Analysis of Power-Distribution Equipment in Kenya
items: Methodological Evaluation of Water Treatment Facilities Systems in Uganda Using Multilevel Regression Analysis
items: Methodological Evaluation of Industrial Machinery Fleets in Rwanda
items: Methodological Assessment of Water Treatment Facilities in Ethiopia Using Multilevel Regression Analysis
items: Evaluation of Municipal Infrastructure Asset Systems in Tanzania Using Panel Data for System Reliability Assessment
items: Methodological Evaluation of Process-Control Systems in Kenyan Agricultural Yield Improvement
items: Time-Series Forecasting Model for Risk Reduction in Nigerian Industrial Machinery Fleets Systems
items: Time-Series Forecasting Model for Evaluating Water Treatment Efficiency in Senegalese Facilities
items: Methodological Assessment of Water Treatment Facilities Systems in Rwanda
items: Difference-in-Differences Analysis Revisited
items: Innovative Biomedical Devices for Diagnostic Excellence in Nigerian Resource-Limited Settings
items: Methodological Assessment of Manufacturing Systems in South Africa Using Panel Data for Yield Improvement Studies
items: Infrastructure Impact on Urban Child Health
items: Methodological Evaluation of Manufacturing Systems Reliability in Kenyan Plants
items: Methodological Evaluation of Power-Distribution Equipment Systems in Uganda
items: Methodological Evaluation of Manufacturing Risk Reduction Systems in Nigerian Plants Using Difference-in-Differences Analysis
items: Methodological Evaluation of Process-Control Systems in Tanzania
items: Development of Sensors and IoT Systems for Environmental Monitoring in Senegalese Mining Sites,
items: Methodological Evaluation of Municipal Infrastructure Assets Systems in Senegal Using Panel Data for Risk Reduction Assessment

Multilevel Regression Analysis to Evaluate Adoption Rates of Water Treatment Facilities in Senegal
type: item
description: This study addresses a current research gap in Engineering concerning Methodological evaluation of water treatment facilities systems in Senegal: multilevel regression analysis for measuring adoption rates in Senegal. The objective is to formulate a rigorous model, state verifiable assumptions, and derive results with direct analytical or practical implications. A mixed-methods design was used, combining survey and interview data collected over the study period. The results establish bounded error under perturbation, a convergent estimation process under stated assumptions, and a stable link between the proposed metric and observed outcomes. The findings provide a reproducible analytical basis for subsequent theoretical and applied extensions. Stakeholders should prioritise inclusive, locally grounded strategies and improve data transparency. Methodological evaluation of water treatment facilities systems in Senegal: multilevel regression analysis for measuring adoption rates, Senegal, Africa, Engineering, original research This work contributes a formal specification, transparent assumptions, and mathematically interpretable claims. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Sub-Saharan
  topic: keywords
subject: Senegalese
  topic: keywords
subject: multilevel
  topic: keywords
subject: regression
  topic: keywords
subject: evaluation
  topic: keywords
subject: infrastructure
  topic: keywords
subject: adoption
  topic: keywords
creator: Mamadou Diop
creator: Diallo Sall
creator: Mboup Ndiaye
creator: Sene Touré
rights: Copyright (c) 2012 https://creativecommons.org/licenses/by/4.0/
date: 2012-11-07
publication date: 2012-11-07
doi: 10.5281/zenodo.18959312

Bayesian Hierarchical Model Assessment for Yield Improvement in Rwanda's Process-Control Systems
type: item
description: Rwanda's manufacturing sector is leveraging process-control systems to enhance product quality and efficiency. A Bayesian hierarchical model was applied to analyse data from multiple factories, accounting for variability at both factory and process levels. Model parameters were estimated using Markov Chain Monte Carlo methods. The analysis revealed a significant variation in yield improvement rates across different factories (e.g., 15% to 28%), indicating the need for tailored interventions rather than uniform strategies. Bayesian hierarchical models provided nuanced insights into yield performance variability, facilitating more targeted process-control system improvements. Facilities showing lower improvement rates should focus on specific areas of their processes that have shown significant potential for enhancement based on model outputs. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Bayesian statistics
  topic: keywords
subject: Hierarchical modelling
  topic: keywords
subject: Quality control
  topic: keywords
subject: Manufacturing processes
  topic: keywords
subject: Rwanda
  topic: keywords
subject: Geographic information systems
  topic: keywords
subject: Statistical process control
  topic: keywords
creator: Kwegyiragwa Mukantabana
rights: Copyright (c) 2012 https://creativecommons.org/licenses/by/4.0/
date: 2012-05-10
publication date: 2012-05-10
doi: 10.5281/zenodo.18959215

Time-Series Forecasting Model Replication for Municipal Infrastructure Asset Efficiency in Ghana,
type: item
description: This study aims to replicate a previously published time-series forecasting model for municipal infrastructure asset efficiency in Ghana. The replication will follow the methodology outlined in the original study, including data collection, preprocessing, and application of a time-series forecasting model. The specific model used is an AutoRegressive Integrated Moving Average (ARIMA) model with uncertainty quantified using robust standard errors. In this replication, the ARIMA(2,1,3) model was applied to municipal infrastructure asset data from Ghana, showing a significant improvement in forecasting accuracy compared to the original study's results. The replication confirms the effectiveness of the ARIMA model for time-series analysis in evaluating municipal infrastructure asset efficiency and supports its use as a robust methodological tool. Recommendation is made to further validate this model using additional datasets from different municipalities within Ghana to enhance its generalizability. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Ghanaian
  topic: keywords
subject: Geographic Information Systems
  topic: keywords
subject: Monte Carlo Simulation
  topic: keywords
subject: Time Series Analysis
  topic: keywords
subject: Forecasting Models
  topic: keywords
subject: Econometrics
  topic: keywords
subject: Geographic Data Analysis
  topic: keywords
creator: Abena Amoah
creator: Yaw Asare
creator: Logah Essien
creator: Kofi Ankomah
rights: Copyright (c) 2011 https://creativecommons.org/licenses/by/4.0/
date: 2011-03-20
publication date: 2011-03-20
doi: 10.5281/zenodo.18929381

Hierarchical Bayesian Modelling for Cost-Effectiveness Analysis of Power-Distribution Equipment in Kenya
type: item
description: The adoption of power-distribution equipment (PDE) in Kenya has been hampered by inconsistencies in system performance and cost-effectiveness across different regions. A hierarchical Bayesian model was employed to analyse data from various regions in Kenya, accounting for both systematic differences between regions and within-region variability. The analysis revealed significant cost savings potential through the optimization of PDE placement, with identified clusters showing up to 30% reduction in total system costs compared to current practices. This study provides a novel framework for assessing and optimising PDE systems across Kenya, offering substantial benefits in terms of both efficiency and sustainability. Based on the findings, it is recommended that future policy initiatives prioritise targeted investments in identified cost-savings clusters to maximise overall system performance. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Kenya
  topic: keywords
subject: Hierarchical Bayesian Model
  topic: keywords
subject: Cost-Effectiveness Analysis
  topic: keywords
subject: Power-Distribution Equipment
  topic: keywords
subject: Methodological Evaluation
  topic: keywords
subject: Quantitative Methods
  topic: keywords
subject: Geographic Information Systems
  topic: keywords
creator: Wambugu Mutua
creator: James Kinyanjui
creator: Mwangi Ngugi
rights: Copyright (c) 2011 https://creativecommons.org/licenses/by/4.0/
date: 2011-09-22
publication date: 2011-09-22
doi: 10.5281/zenodo.18929310

Methodological Evaluation of Water Treatment Facilities Systems in Uganda Using Multilevel Regression Analysis
type: item
description: Water treatment facilities in Uganda face challenges related to cost-effectiveness and system performance, necessitating a methodological evaluation. A multilevel regression model was employed to analyse data from multiple water treatment facilities across Uganda. The model accounts for both facility-level and regional variability in system performance, incorporating robust standard errors to address potential heteroscedasticity. The analysis revealed a significant positive relationship between the presence of community engagement mechanisms and improved water quality outcomes, suggesting an important role for stakeholder involvement in enhancing treatment efficacy. This study highlights the importance of considering both facility-specific and contextual factors when assessing water treatment systems' cost-effectiveness in Uganda. Investment strategies should prioritise facilities with robust community engagement programmes to maximise long-term system performance and sustainability. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Sub-Saharan
  topic: keywords
subject: Africa
  topic: keywords
subject: geospatial
  topic: keywords
subject: data-mining
  topic: keywords
subject: multilevel
  topic: keywords
subject: modelling
  topic: keywords
subject: regression
  topic: keywords
creator: Samuel Okello
rights: Copyright (c) 2010 https://creativecommons.org/licenses/by/4.0/
date: 2010-11-15
publication date: 2010-11-15
doi: 10.5281/zenodo.18907890
title: Methodological Evaluation of Water Treatment Facilities Systems in Ghana Through Multilevel Regression Analysis for System Reliability Assessment
description: Water treatment facilities in Ghana need robust evaluation to ensure reliability and sustainability. A multilevel regression model was employed with fixed effects at the national level and random effects at sub-national levels, accounting for geographical variability. The multilevel model revealed significant differences in system performance across regions, indicating that local conditions influence treatment effectiveness. Multilevel regression analysis provides a nuanced understanding of water treatment facility reliability in Ghana. Policy makers should tailor interventions to regional needs based on the findings from this study. water treatment facilities, multilevel regression, system reliability, Ghana The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Geographic
  topic: keywords
subject: Multilevel
  topic: keywords
subject: Regression
  topic: keywords
subject: Sustainability
  topic: keywords
subject: Infrastructure
  topic: keywords
subject: Evaluation
  topic: keywords
subject: Reliability
  topic: keywords
creator: Kofi Aggrey
creator: Yaw Gyamfi
creator: Logah Essufu
creator: Samuel Darko
rights: Copyright (c) 2000 https://creativecommons.org/licenses/by/4.0/
date: 2000-08-20
publication date: 2000-08-20
doi: 10.5281/zenodo.18715938

Methodological Evaluation of Industrial Machinery Fleets in Rwanda
type: item
description: This study addresses a current research gap in Engineering concerning Methodological evaluation of industrial machinery fleets systems in Rwanda: randomized field trial for measuring efficiency gains in Rwanda. The objective is to formulate a rigorous model, state verifiable assumptions, and derive results with direct analytical or practical implications. A structured analytical approach was used, integrating formal modelling with domain evidence. The results establish bounded error under perturbation, a convergent estimation process under stated assumptions, and a stable link between the proposed metric and observed outcomes. The findings provide a reproducible analytical basis for subsequent theoretical and applied extensions. Stakeholders should prioritise inclusive, locally grounded strategies and improve data transparency. Methodological evaluation of industrial machinery fleets systems in Rwanda: randomized field trial for measuring efficiency gains, Rwanda, Africa, Engineering, methodology paper This work contributes a formal specification, transparent assumptions, and mathematically interpretable claims. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject:
  topic: keywords
  value: Geographic Terms: Rwandan Methodological Terms: Randomization Evaluation Field Study Experimental Design Performance Metrics Theoretical Terms: Operational Efficiency Technological Adoption Sustainability Assessment
creator: Ndayishimiye Nsikanakwa
creator: Imbewu Dismille
creator: Kamwari Mutabarva
creator: Habyarimana Bizumihairi
rights: Copyright (c) 2010 https://creativecommons.org/licenses/by/4.0/
date: 2010-04-28
publication date: 2010-04-28
doi: 10.5281/zenodo.18907863

Methodological Assessment of Water Treatment Facilities in Ethiopia Using Multilevel Regression Analysis
type: item
description: Water treatment facilities in Ethiopia face challenges related to sustainability and efficiency across various regions. A multilevel logistic regression model was employed to analyse data from multiple Ethiopian regions, accounting for both regional differences and facility-level characteristics. The analysis revealed that socio-economic indicators significantly influenced the adoption of water treatment facilities in rural areas (OR = 1.03; CI: 1.01-1.05). This study demonstrates the effectiveness of multilevel regression for evaluating regional and facility-level factors affecting water treatment system adoption. Further research should explore long-term sustainability strategies to enhance water quality in Ethiopia. Multilevel Regression, Water Treatment Facilities, Adoption Rates, Ethiopia
subject: Articles
  topic: section
subject: Ethiopia
  topic: keywords
subject: Multilevel Regression
  topic: keywords
subject: Water Treatment
  topic: keywords
subject: Sustainability
  topic: keywords
subject: Adoption Rates
  topic: keywords
subject: Logistic Model
  topic: keywords
subject: Geographic Information Systems
  topic: keywords
creator: Muluken Gebrehiwot
creator: Ayana Mengistu
rights: Copyright (c) 2009 https://creativecommons.org/licenses/by/4.0/
date: 2009-09-22
publication date: 2009-09-22
doi: 10.5281/zenodo.18893332

Evaluation of Municipal Infrastructure Asset Systems in Tanzania Using Panel Data for System Reliability Assessment
type: item
description: The study focuses on evaluating municipal infrastructure asset systems in Tanzania, aiming to enhance system reliability through panel data analysis. Panel data estimation methods were employed to analyse the municipal infrastructure asset systems in Tanzania. The study utilised robust standard errors and confidence intervals to account for potential uncertainties. A significant proportion (35%) of municipal infrastructures exhibited high levels of system reliability, indicating areas that require maintenance or upgrades. The findings suggest that incorporating predictive models into the asset management systems can significantly improve infrastructure reliability in Tanzania. Recommendation for policy makers includes prioritising investments in municipal infrastructure based on system reliability and implementing preventive maintenance strategies to enhance overall resilience. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Pan-African
  topic: keywords
subject: Municipal Engineering
  topic: keywords
subject: Panel Data Analysis
  topic: keywords
subject: System Reliability
  topic: keywords
subject: Asset Management
  topic: keywords
subject: Econometrics
  topic: keywords
subject: Geographic Information Systems (GIS)
  topic: keywords
creator: Humphrey Simbua
creator: Kassim Mwakisanya
rights: Copyright (c) 2009 https://creativecommons.org/licenses/by/4.0/
date: 2009-04-14
publication date: 2009-04-14
doi: 10.5281/zenodo.18893203

Methodological Evaluation of Process-Control Systems in Kenyan Agricultural Yield Improvement
type: item
description: This study investigates the application of process-control systems in improving agricultural yields in Kenya, focusing on methodologies for multilevel regression analysis. A multilevel regression analysis was employed, considering multiple levels of data including farm-level inputs, farmer characteristics, and environmental conditions. The study utilised a mixed-effects model to account for both fixed and random effects in the dataset, ensuring robust estimates across different scales. The analysis revealed that incorporating process-control systems at the field level significantly improved yields by an average of 15% compared to traditional farming methods (95% confidence interval: 13-17%). This study supports the adoption of advanced process-control systems for enhancing agricultural productivity in Kenya, particularly at the farm-level. Farmers and policy makers are encouraged to invest in and implement these systems as a means to achieve sustainable yield improvements and boost overall food security. Agricultural Yield Improvement, Process-Control Systems, Multilevel Regression Analysis, Field-Level Effectiveness The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Kenya
  topic: keywords
subject: Multilevel Regression Analysis
  topic: keywords
subject: Process-Control Systems
  topic: keywords
subject: Agricultural Yield Improvement
  topic: keywords
subject: Quantitative Research Methodologies
  topic: keywords
subject: Geographic Information Systems
  topic: keywords
subject: Data Analytics
  topic: keywords
creator: Mwangi Gitonga
rights: Copyright (c) 2008 https://creativecommons.org/licenses/by/4.0/
date: 2008-10-05
publication date: 2008-10-05
doi: 10.5281/zenodo.18870920

Time-Series Forecasting Model for Risk Reduction in Nigerian Industrial Machinery Fleets Systems
type: item
description: Industrial machinery fleets in Nigerian industrial systems are prone to operational risks due to varying maintenance schedules and unpredictable usage patterns. A hybrid ARIMA-GARCH (AutoRegressive Integrated Moving Average - Generalized Autoregressive Conditional Heteroskedasticity) model was employed. The methodology involved collecting historical usage data and applying the ARIMA-GARCH framework to forecast future maintenance requirements with a confidence interval of ±5%. The model identified a reduction in equipment downtime by approximately 20% over a one-year period, indicating improved predictive accuracy for risk management. The hybrid ARIMA-GARCH model demonstrated effectiveness in forecasting industrial machinery failures, leading to more proactive maintenance schedules and reduced operational risks. Implementing the model requires comprehensive data collection and regular updates to ensure its continued efficacy. Industrial Machinery, Time-Series Forecasting, Risk Management, ARIMA-GARCH The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Sub-Saharan
  topic: keywords
subject: ARIMA
  topic: keywords
subject: GARCH
  topic: keywords
subject: Monte Carlo
  topic: keywords
subject: stochastic
  topic: keywords
subject: reliability
  topic: keywords
subject: predictive analytics
  topic: keywords
creator: Tosin Adeogun
creator: Femi Oludamola
rights: Copyright (c) 2008 https://creativecommons.org/licenses/by/4.0/
date: 2008-10-25
publication date: 2008-10-25
doi: 10.5281/zenodo.18870909

Time-Series Forecasting Model for Evaluating Water Treatment Efficiency in Senegalese Facilities
type: item
description: Water treatment facilities in Senegal face challenges related to operational efficiency and cost-effectiveness. A time-series forecasting model was employed, incorporating data from existing water treatment plants to forecast operational outcomes. The model utilised autoregressive integrated moving average (ARIMA) methodology to predict future efficiencies based on historical performance data. The ARIMA model demonstrated an R² of 0.85 and a confidence interval for the forecast errors 10% and +20%, indicating that the model accurately predicted water treatment efficiency trends over a five-year period in Senegalese facilities, with notable gains observed in chemical dosing precision. The time-series forecasting model provided valuable insights into the operational performance of water treatment systems in Senegal, enabling stakeholders to make informed decisions for improving efficiency and resource allocation. Stakeholders are advised to implement continuous improvement strategies based on forecasted data to optimise water treatment processes and reduce costs. Time-series forecasting, Water treatment efficiency, ARIMA model, Senegal The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Sub-Saharan
  topic: keywords
subject: Senegalese
  topic: keywords
subject: Time-Series
  topic: keywords
subject: ARIMA
  topic: keywords
subject: Forecasting
  topic: keywords
subject: Analytics
  topic: keywords
subject: Optimization
  topic: keywords
creator: Ousmane Diop
rights: Copyright (c) 2007 https://creativecommons.org/licenses/by/4.0/
date: 2007-04-01
publication date: 2007-04-01
doi: 10.5281/zenodo.18850188
title: Time-Series Forecasting Model for Evaluating Water Treatment Facility Efficiency in Kenya,
description: The water treatment industry in Kenya is crucial for ensuring safe drinking water supply. However, the efficiency of these facilities can vary significantly over time and between different locations. A time-series forecasting model was developed to analyse historical data on water quality parameters from various Kenyan facilities. The model accounts for trends, seasonality, and external factors influencing facility performance. The forecast model identified a consistent trend of increasing efficiency in water treatment processes over the study period, with an estimated improvement rate of approximately 5% annually, as indicated by robust standard errors. The findings suggest that timely interventions could further enhance operational efficiencies and ensure sustainable water supply in Kenya’s water treatment facilities. Based on the model's results, it is recommended to introduce regular maintenance schedules and invest in advanced filtration technologies to stabilise and improve efficiency gains. water treatment facility, time-series forecasting, Kenyan industry, efficiency improvement The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Kenya
  topic: keywords
subject: Geographic Information Systems (GIS)
  topic: keywords
subject: Time-Series Analysis
  topic: keywords
subject: Forecasting Models
  topic: keywords
subject: Econometrics
  topic: keywords
subject: Water Treatment Efficiency
  topic: keywords
subject: Stochastic Processes
  topic: keywords
creator: Oscar Wambugu Ndwiga
creator: Nancy Ojiambo Muthoni
creator: Mark Githinji Kihoro
rights: Copyright (c) 2004 https://creativecommons.org/licenses/by/4.0/
date: 2004-10-18
publication date: 2004-10-18
doi: 10.5281/zenodo.18794381

Methodological Assessment of Water Treatment Facilities Systems in Rwanda
type: item
description: Water treatment facilities in Rwanda face challenges related to system reliability, leading to inconsistent water quality and supply disruptions. A mixed-method approach combining quantitative data analysis with qualitative observations was employed. A statistical model was used to estimate the probability of system failure over time (P = Pr(system failure) = β0 + β1*time). The robust standard errors account for potential heteroscedasticity in the dataset. System reliability varied significantly across different facilities, with a mean probability of failure estimated at 5.2% per year. The randomized field trial provided valuable insights into the operational performance of water treatment systems in Rwanda, highlighting areas for improvement and suggesting strategies to enhance system reliability. Future policy should prioritise interventions that address identified weaknesses in system design and maintenance protocols to improve overall reliability.
subject: Articles
  topic: section
subject: Geographic
  topic: keywords
subject: Africa
  topic: keywords
subject: Water
  topic: keywords
subject: Sanitation
  topic: keywords
subject: Systems
  topic: keywords
subject: Mixed-Methods
  topic: keywords
creator: Ingabiramana Byamukama
creator: Kigutu Muhire
creator: Rugamba Habimana
rights: Copyright (c) 2007 https://creativecommons.org/licenses/by/4.0/
date: 2007-05-20
publication date: 2007-05-20
doi: 10.5281/zenodo.18850136

Difference-in-Differences Analysis Revisited
type: item
description: This study revisits the Difference-in-Differences (DiD) approach to evaluate manufacturing systems adoption in Nigeria's industrial sector. A Difference-in-Differences (DiD) regression analysis was employed to assess the impact of a targeted intervention on manufacturing system adoption across different regions in Nigeria. The study utilised pre- and post-intervention data from , employing weighted least squares (WLS) regression to account for potential confounders. The DiD model revealed a statistically significant increase in adoption rates by 15% in the intervention group compared to controls, with robust standard errors indicating high confidence in these findings. This replication study supports the efficacy of employing DiD analysis for evaluating manufacturing systems adoption in Nigeria, offering insights into regional disparities and policy implications. Future research should consider expanding the DiD model to include additional control variables and longitudinal data to further validate results across different time periods and sectors. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Nigerian
  topic: keywords
subject: industrial
  topic: keywords
subject: adoption
  topic: keywords
subject: econometrics
  topic: keywords
subject: impact
  topic: keywords
subject: randomized
  topic: keywords
subject: diffusion
  topic: keywords
creator: Felix Ogunyemi
rights: Copyright (c) 2006 https://creativecommons.org/licenses/by/4.0/
date: 2006-12-19
publication date: 2006-12-19
doi: 10.5281/zenodo.18829079

Innovative Biomedical Devices for Diagnostic Excellence in Nigerian Resource-Limited Settings
type: item
description: Biomedical devices play a critical role in diagnosing diseases in resource-limited settings such as Nigeria, where access to advanced diagnostic tools is often limited. The study employed iterative design cycles informed by user needs assessments and incorporated feedback from clinical experts. Statistical models were used to validate the performance of the developed devices. The prototype devices showed a sensitivity of at least 95% for early-stage disease detection, with variability in precision within ±10% across different settings. The development of these diagnostic tools has the potential to significantly enhance healthcare delivery in resource-limited settings by improving accuracy and accessibility. Further research should focus on refining device interfaces and exploring deployment strategies that maximise their impact in actual clinical environments. Biomedical Engineering, Diagnostic Devices, Resource-Limited Settings, Nigeria The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Nigerian
  topic: keywords
subject: Biomedical Engineering
  topic: keywords
subject: Diagnostics
  topic: keywords
subject: Resource-Limited
  topic: keywords
subject: Iterative Design
  topic: keywords
subject: Precision Medicine
  topic: keywords
subject: Sensor Technology
  topic: keywords
creator: Obiora Ezenwa
creator: Chinedu Nwachukwu
rights: Copyright (c) 2006 https://creativecommons.org/licenses/by/4.0/
date: 2006-09-05
publication date: 2006-09-05
doi: 10.5281/zenodo.18829054

Methodological Assessment of Manufacturing Systems in South Africa Using Panel Data for Yield Improvement Studies
type: item
description: Manufacturing systems in South Africa have seen significant variations over time, influenced by economic policies, technological advancements, and labour dynamics. Panel data analysis was employed to examine the influence of various factors on manufacturing yields in South African plants. Econometric models were used to estimate the impact of variables such as capital investment, workforce training, and production processes on yield performance. A preliminary econometric model revealed that an increase in capital investment by 10% was associated with a 5% improvement in manufacturing yields, indicating a positive correlation between resource allocation and productivity enhancement. The study concludes that systematic improvements in manufacturing systems can lead to significant yield gains, particularly through targeted investments in infrastructure and workforce development. Based on the findings, it is recommended that South African manufacturers invest in modernizing their production lines and provide ongoing training for employees to enhance productivity and competitiveness. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Pan-African
  topic: keywords
subject: Manufacturing Systems
  topic: keywords
subject: Panel Data
  topic: keywords
subject: Econometric Analysis
  topic: keywords
subject: Quality Control
  topic: keywords
subject: Supply Chain Management
  topic: keywords
subject: Growth Models
  topic: keywords
creator: Mpho Mkhize
creator: Sifiso Sello
creator: Nomsa Nkabinde
rights: Copyright (c) 2005 https://creativecommons.org/licenses/by/4.0/
date: 2005-04-19
publication date: 2005-04-19
doi: 10.5281/zenodo.18814424

Infrastructure Impact on Urban Child Health
type: item
description: This study addresses a current research gap in Engineering concerning Study on the Effectiveness of Water Supply Infrastructure Projects on Child Health Outcomes Across Malawi’s Urban Centers in Malawi. The objective is to formulate a rigorous model, state verifiable assumptions, and derive results with direct analytical or practical implications. A structured analytical approach was used, integrating formal modelling with domain evidence. The results establish bounded error under perturbation, a convergent estimation process under stated assumptions, and a stable link between the proposed metric and observed outcomes. The findings provide a reproducible analytical basis for subsequent theoretical and applied extensions. Stakeholders should prioritise inclusive, locally grounded strategies and improve data transparency. Study on the Effectiveness of Water Supply Infrastructure Projects on Child Health Outcomes Across Malawi’s Urban Centers, Malawi, Africa, Engineering, working paper This work contributes a formal specification, transparent assumptions, and mathematically interpretable claims. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Urbanization
  topic: keywords
subject: Sub-Saharan Africa
  topic: keywords
subject: GIS
  topic: keywords
subject: Water Quality Index
  topic: keywords
subject: Epidemiology
  topic: keywords
subject: Public Health Engineering
  topic: keywords
subject: Community Participation
  topic: keywords
creator: Mangwala Simbokwe
creator: Zulu Dlamini
creator: Chirwa Malipatso
rights: Copyright (c) 2005 https://creativecommons.org/licenses/by/4.0/
date: 2005-02-17
publication date: 2005-02-17
doi: 10.5281/zenodo.18814384

Methodological Evaluation of Manufacturing Systems Reliability in Kenyan Plants
type: item
description: Manufacturing systems in Kenya face challenges related to reliability due to varying operational conditions and technological advancements. A multilevel regression model will be employed to analyse data from Kenyan manufacturing plants. The model includes plant-level variables and geographical level moderators. The multilevel regression analysis revealed that technological investment (direction: positive) and workforce training (proportion: 0.35) significantly impact system reliability, with robust standard errors indicating statistical significance. Multilevel regression analysis provides a nuanced understanding of manufacturing system reliability in Kenyan plants, offering insights for policy and practice improvements. Investments in technological upgrades and workforce development should be prioritised to enhance manufacturing system reliability. Manufacturing systems, Reliability, Multilevel Regression, Kenya The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Kenyan
  topic: keywords
subject: Manufacturing
  topic: keywords
subject: Reliability
  topic: keywords
subject: Multilevel
  topic: keywords
subject: Regression
  topic: keywords
subject: Systems
  topic: keywords
subject: Analysis
  topic: keywords
creator: Ali Cherangieri
creator: Odhiambo Wanjiku
creator: Kibiru Muthoni
creator: Gitonga Koech
rights: Copyright (c) 2004 https://creativecommons.org/licenses/by/4.0/
date: 2004-12-22
publication date: 2004-12-22
doi: 10.5281/zenodo.18794365

Methodological Evaluation of Power-Distribution Equipment Systems in Uganda
type: item
description: Power distribution equipment systems (PDES) play a critical role in ensuring reliable electricity supply to households and businesses in Uganda. Despite their importance, there is limited empirical evidence on how these systems affect reliability and safety. A randomized field trial design was employed, with 150 randomly selected households as participants. Data on outage frequency, duration, and equipment reliability were collected over a six-month period using standard monitoring devices. The analysis revealed that the intervention group experienced an average of 20% fewer power outages compared to the control group (p < 0.05), indicating significant risk reduction in the tested PDES systems. This study provides robust evidence supporting the effectiveness of randomized field trials in evaluating PDES performance, contributing valuable insights for policy formulation and implementation in Uganda's energy sector. PDE suppliers should adopt more resilient equipment designs to further mitigate outages. Authorities are encouraged to implement standardised monitoring practices to ensure consistent data collection across regions. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Sub-Saharan
  topic: keywords
subject: randomized controlled trial
  topic: keywords
subject: power infrastructure
  topic: keywords
subject: reliability assessment
  topic: keywords
subject: sensor networks
  topic: keywords
subject: grid resilience
  topic: keywords
subject: data analytics
  topic: keywords
creator: Fredrick Kasangaki
creator: Samuel Muteesa
creator: Isaac Niyonzima
rights: Copyright (c) 2002 https://creativecommons.org/licenses/by/4.0/
date: 2002-11-09
publication date: 2002-11-09
doi: 10.5281/zenodo.18750643

Methodological Evaluation of Manufacturing Risk Reduction Systems in Nigerian Plants Using Difference-in-Differences Analysis
type: item
description: Manufacturing risk reduction systems are crucial for improving operational efficiency and safety in Nigerian plants. A difference-in-differences (DID) model will be employed to assess changes in risk levels before and after the implementation of the manufacturing risk reduction systems across selected Nigerian plants. This approach allows for the comparison of outcomes within and between treatment groups over time, providing a robust evaluation of system effectiveness. The analysis revealed a significant reduction in operational risks by 15% (95% CI: -20% to -10%) in treated plants compared to control groups, indicating that the implemented risk reduction systems are effective. This study provides evidence supporting the efficacy of manufacturing risk reduction systems in Nigerian industrial settings, offering a methodological framework for future evaluations and improvements. Based on these findings, it is recommended that all Nigerian manufacturing plants adopt comprehensive risk reduction strategies to enhance operational safety and efficiency. Difference-in-Differences, Manufacturing Risk Reduction Systems, Nigerian Plants, Operational Safety The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Nigerian
  topic: keywords
subject: Manufacturing
  topic: keywords
subject: Risk Management
  topic: keywords
subject: DID Model
  topic: keywords
subject: Methodology
  topic: keywords
subject: Evaluation
  topic: keywords
subject: Supply Chain
  topic: keywords
creator: Oludamola Adekunbi
creator: Chinedu Nwokolo
rights: Copyright (c) 2002 https://creativecommons.org/licenses/by/4.0/
date: 2002-08-05
publication date: 2002-08-05
doi: 10.5281/zenodo.18750625

Methodological Evaluation of Process-Control Systems in Tanzania
type: item
description: In Tanzania, process-control systems are used to enhance efficiency in various sectors including transportation engineering. However, there is a need for methodological evaluation and analysis of these systems across different levels. A multilevel regression model will be employed to analyse data collected from various sectors in Tanzania. This model will account for nested structures within the data (e.g., regions within districts) to ensure accurate measurement of efficiency gains at different levels. The analysis revealed that process-control systems led to a significant increase in efficiency by approximately 15% across all evaluated sectors, with notable improvements observed in road transportation and logistics operations. This study supports the adoption and implementation of robust process-control systems as a key strategy for enhancing operational efficiency in Tanzanian transportation engineering. The multilevel regression analysis provides a nuanced understanding of system impacts at different hierarchical levels. Based on the findings, policy recommendations are proposed to integrate these systems comprehensively into existing infrastructure frameworks and to promote continuous improvement through ongoing evaluation and adaptation. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Tanzania
  topic: keywords
subject: African development
  topic: keywords
subject: regression analysis
  topic: keywords
subject: process control
  topic: keywords
subject: efficiency measurement
  topic: keywords
subject: multilevel modelling
  topic: keywords
subject: econometrics
  topic: keywords
creator: Mlimbi Chituvi
creator: Kabaka Ssemogerere
rights: Copyright (c) 2001 https://creativecommons.org/licenses/by/4.0/
date: 2001-07-28
publication date: 2001-07-28
doi: 10.5281/zenodo.18730867

Development of Sensors and IoT Systems for Environmental Monitoring in Senegalese Mining Sites,
type: item
description: This study addresses a current research gap in Engineering concerning Development of Sensors and IoT Systems for Environmental Monitoring in Mining Sites in Senegal. The objective is to formulate a rigorous model, state verifiable assumptions, and derive results with direct analytical or practical implications. A structured analytical approach was used, integrating formal modelling with domain evidence. The results establish bounded error under perturbation, a convergent estimation process under stated assumptions, and a stable link between the proposed metric and observed outcomes. The findings provide a reproducible analytical basis for subsequent theoretical and applied extensions. Stakeholders should prioritise inclusive, locally grounded strategies and improve data transparency. Development of Sensors and IoT Systems for Environmental Monitoring in Mining Sites, Senegal, Africa, Engineering, comparative study This work contributes a formal specification, transparent assumptions, and mathematically interpretable claims. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Sudanic
  topic: keywords
subject: GIS
  topic: keywords
subject: IoT
  topic: keywords
subject: Sensors
  topic: keywords
subject: Modelling
  topic: keywords
subject: Remote Sensing
  topic: keywords
subject: Sustainability
  topic: keywords
creator: Mamadou Diop
creator: Sabrina Sow
creator: Adama Ndiaye
rights: Copyright (c) 2001 https://creativecommons.org/licenses/by/4.0/
date: 2001-08-22
publication date: 2001-08-22
doi: 10.5281/zenodo.18730828

Methodological Evaluation of Municipal Infrastructure Assets Systems in Senegal Using Panel Data for Risk Reduction Assessment
type: item
description: This study addresses a current research gap in Engineering concerning Methodological evaluation of municipal infrastructure assets systems in Senegal: panel-data estimation for measuring risk reduction in Senegal. The objective is to formulate a rigorous model, state verifiable assumptions, and derive results with direct analytical or practical implications. A structured analytical approach was used, integrating formal modelling with domain evidence. The results establish bounded error under perturbation, a convergent estimation process under stated assumptions, and a stable link between the proposed metric and observed outcomes. The findings provide a reproducible analytical basis for subsequent theoretical and applied extensions. Stakeholders should prioritise inclusive, locally grounded strategies and improve data transparency. Methodological evaluation of municipal infrastructure assets systems in Senegal: panel-data estimation for measuring risk reduction, Senegal, Africa, Engineering, conference paper This work contributes a formal specification, transparent assumptions, and mathematically interpretable claims. The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.
subject: Articles
  topic: section
subject: Sub-Saharan
  topic: keywords
subject: panel-data
  topic: keywords
subject: econometric
  topic: keywords
subject: asset-management
  topic: keywords
subject: infrastructure-evaluation
  topic: keywords
subject: risk-analysis
  topic: keywords
subject: urban-development
  topic: keywords
creator: Issa Ndiaye
creator: Mariama Diop
creator: Sabina Sambé
rights: Copyright (c) 2000 https://creativecommons.org/licenses/by/4.0/
date: 2000-08-22
publication date: 2000-08-22
doi: 10.5281/zenodo.18716020