Contact

All Stories

  1. Global Beryllium-7 Dynamics: Nonlinear Scaling Properties, Spatial Classification, and Sensitivity to Atmospheric Teleconnections

    Article • March 2026, Copernicus GmbH

    Dr. Samuel T Ogunjo

  2. Assessment of power law limitations and hub-height wind speed estimation using machine learning techniques in a tropical location

    Article • Machine Learning Earth, March 2026, Institute of Physics Publishing

    Dr. Samuel T Ogunjo

  3. Beyond the Flow: Multifractal Clustering of River Discharge Across Canada Using Near-Century Data

    Article • Hydrology, December 2025, MDPI AG

    Dr. Samuel T Ogunjo

  4. Estimation of Surface PM2.5 Concentration from Satellite Aerosol Optical Depth Using a Constrained Observation-Based Model

    Article • Climate, December 2025, MDPI AG

    Dr. Samuel T Ogunjo

  5. Geospatial assessment of heatwaves and the role of land cover dynamics based on remote sensing data in parts of Northeast Nigeria

    Article • Advances in Space Research, December 2025, Elsevier

    Dr. Samuel T Ogunjo

  6. Deep Learning Prediction of Inter-storm Parameters Using Transformer Convolution Network

    Article • October 2025, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  7. Nonlinear and multifractal behaviour of atmospheric parameters and particulate matter in South Africa

    Article • Discover Geoscience, September 2025, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  8. The effect of solar radiation modification on agroclimatic indices in Africa

    Article • Environmental Research Climate, July 2025, Institute of Physics Publishing

    Dr. Samuel T Ogunjo

  9. Complexity in Dst index values over Solar Cycle 24

    Article • Astrophysics and Space Science, July 2025, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  10. Long term spatial trends in West African monsoon precipitation

    Article • Proceedings of the Nigerian Academy of Science, June 2025, Nigerian Academy of Science

    Dr. Samuel T Ogunjo

  11. Long-term variability study of total column ozone over Nigeria using multi-sensor reanalysis measurements

    Article • Discover Geoscience, June 2025, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  12. A Bootstrapping Convolutional Neural Network Technique for Optimizing Automated Detection of Equatorial Plasma Bubbles by Optical All‐Sky Imagers

    Article • Earth and Space Science, June 2025, American Geophysical Union (AGU)

    Dr. Samuel T Ogunjo

  13. Projected Impact of Stratospheric Aerosol Injection on Rainfall dynamics over West Africa using ARISE Dataset.

    Article • May 2025, Copernicus GmbH

    Dr. Samuel T Ogunjo

  14. Urban Heatwave Dynamics in Lagos State: Evidence from the Analysis of Land Surface Temperature Trends and Land Cover Changes (2000–2022)

    Article • Earth Systems and Environment, May 2025, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  15. Spatial structure, distribution, and fractal analysis of lightning waiting times in three global hotspots

    Article • Journal of Atmospheric and Solar-Terrestrial Physics, May 2025, Elsevier

    Dr. Samuel T Ogunjo

  16. Variability in global 7Be and drivers of its distribution using multifractal detrended fluctuation analysis

    Article • March 2025, Copernicus GmbH

    Dr. Samuel T Ogunjo

  17. Radiation Dosimetry and Heavy Metal Assessment of Honey in Akure, Ondo State, Nigeria

    Article • FUOYE Journal of Engineering and Technology, February 2025, African Journals Online (AJOL)

    Dr. Samuel T Ogunjo

  18. Leveraging satellite and reanalysis air quality data for bottom-up approach in tackling air pollution in nigeria

    Article • January 2025, Copernicus GmbH

    Dr. Samuel T Ogunjo

  19. Wind energy characterization using multifractal formalism at two different altitudes in a tropical country

    Article • Modeling Earth Systems and Environment, January 2025, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  20. Longitudinal variability of complexities associated with equatorial electrojet and its coupling with Solar Quiet Daily variation Sq field

    Article • Advances in Space Research, January 2025, Elsevier

    Dr. Samuel T Ogunjo

  21. Peer-Review Statements

    Article • January 2025, Atlantis Press

    Dr. Samuel T Ogunjo

  22. Proceedings of the 8th URSI-NG Annual Conference (URSI-NG 2024)

    Article • January 2025, Atlantis Press

    Dr. Samuel T Ogunjo

  23. Dynamical complexity and multifractal analysis of geomagnetic activities at high temporal scales over three solar cycles

    Article • Journal of Atmospheric and Solar-Terrestrial Physics, December 2024, Elsevier

    Dr. Samuel T Ogunjo

  24. Nonlinear and multifractal detrended fluctuation analysis of radon time series in a volcanic touristic cave

    Article • Journal of Environmental Radioactivity, December 2024, Elsevier

    Dr. Samuel T Ogunjo

  25. Multifractal Detrended Fluctuation Analysis, Cross-Correlation and Clustering of Global 7Be Activity Concentration

    Article • Fluctuation and Noise Letters, November 2024, World Scientific Pub Co Pte Lt

    Dr. Samuel T Ogunjo

  26. NLP Model for Postgraduate Research Examiner Recommendation Based on Scholarly Activity

    Article • November 2024, Institute of Electrical & Electronics Engineers (IEEE)

    Dr. Samuel T Ogunjo

  27. Time series analysis of a 22-year record of 7Be, 210Pb and gross alpha activities in the Canary Islands (Spain) using Principal Component and Multifractal Detrended Fluctuation Analyses

    Article • The Science of The Total Environment, September 2024, Elsevier

    Dr. Samuel T Ogunjo

  28. Threshold identification using daily stream flow records for two stations along the Niger River, West Africa

    Article • August 2024, Taylor & Francis

    Dr. Samuel T Ogunjo

  29. Complexity and Nonlinear Dependence of Ionospheric Electron Content and Doppler Frequency Shifts in Propagating HF Radio Signals within Equatorial Regions

    Article • Atmosphere, May 2024, MDPI AG

    Dr. Samuel T Ogunjo

  30. Imprints of large‐scale climate oscillations on river flow in selected Canadian river catchments

    Article • River, May 2024, Wiley

    Assistant Professor Adeyemi Olusola, Dr. Samuel T Ogunjo

  31. Multifractal and chaotic characteristics of geomagnetic inter-storm interval over eight solar cycles

    Article • Advances in Space Research, May 2024, Elsevier

    Dr. Samuel T Ogunjo

  32. Evolving Patterns in Irrational Numbers Using Waiting Times between Digits

    Article • Fractal and Fractional, March 2024, MDPI AG

    Dr. Samuel T Ogunjo

  33. Validation and Calibration of Tropospheric Wet Delay Models over Nigeria Using GPS Data

    Article • Proceedings of the National Academy of Sciences India Section A Physical Sciences, March 2024, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  34. Active control and electronic simulation of a novel fractional order chaotic jerk system

    Article • Communications in Nonlinear Science and Numerical Simulation, March 2024, Elsevier

    Dr. Samuel T Ogunjo

  35. Detecting Decadal Temporal Shifts in Rainfall Across the West African Sahel During the Twentieth Century

    Article • January 2024, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  36. Multifractal Characterization of Weibull and Gamma Probability Distribution Functions

    Article • January 2024, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  37. Trends in the Spatial Extent of Precipitation Over West Africa in the Twentieth Century

    Article • January 2024, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  38. Predicting River Discharge in the Niger River Basin: A Deep Learning Approach

    Article • Applied Sciences, December 2023, MDPI AG

    Assistant Professor Adeyemi Olusola, Dr. Samuel T Ogunjo

  39. Effects of two commonly used herbicides on soil microbial activity under conservation tillage

    Article • Environmental Advances, October 2023, Elsevier

    Dr. Samuel T Ogunjo

  40. Solar radiation variability across Nigeria’s climatic zones: a validation and projection study with CORDEX, CMIP5, and CMIP6 models

    Article • Modeling Earth Systems and Environment, August 2023, Springer Science + Business Media

    Dr. Olusola Samuel Ojo, Dr. Samuel T Ogunjo

  41. Multidecadal trend analysis of hydrological drought along River Niger using the Streamflow Drought Index

    Article • Singapore Journal of Tropical Geography, August 2023, Wiley

    Assistant Professor Adeyemi Olusola, Dr. Samuel T Ogunjo

  42. Validation of MODIS AOD retrievals in West Africa: a comparison with AERONET observations

    Article • Air Quality Atmosphere & Health, July 2023, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  43. Exploring the suitability of narrow-bandgap compounds for thermoelectric application

    Article • Physica Scripta, June 2023, Institute of Physics Publishing

    Dr. Samuel T Ogunjo

  44. Comparative analysis between ERA5 reanalysis data and MRR observation data at different altitudes for fall velocity and liquid water content

    Article • Advances in Space Research, June 2023, Elsevier

    Professor Joseph Sunday Ojo, Dr. Samuel T Ogunjo

  45. Densification of air quality monitoring in Nigeria: Progress and challenges

    Article • May 2023, Copernicus GmbH

    Dr. Samuel T Ogunjo

  46. Imprints of large-scale oscillations on river flow in selected Canadian river catchments

    Article • May 2023, Copernicus GmbH

    Dr. Samuel T Ogunjo, Assistant Professor Adeyemi Olusola

  47. Multifractal detrended fluctuation analysis of particulate matter and atmospheric variables at different time scales

    Article • Meteorology and Atmospheric Physics, May 2023, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  48. Characterizing river discharge along River Niger using complexity–entropy causality plane

    Article • Arabian Journal of Geosciences, April 2023, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  49. The role of teleconnections and solar activity on the discharge of tropical river systems within the Niger basin

    Article • Environmental Monitoring and Assessment, March 2023, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  50. Evolution and copula modelling of drought duration and severity over Africa using CORDEX‐CORE regional climate models

    Article • International Journal of Climatology, March 2023, Wiley

    Dr. Samuel T Ogunjo

  51. Identification and characterization of molecular entities differentially expressed in bacteria genome upon treatment with glyphosate shock

    Article • Heliyon, March 2023, Elsevier

    Dr. Samuel T Ogunjo

  52. The Impact of the First and Second Waves of COVID‐19 Pandemic in Nigeria

    Article • GeoHealth, March 2023, American Geophysical Union (AGU)

    Dr. Samuel T Ogunjo

  53. Potential of using floating solar photovoltaic and wind farms for sustainable energy generation in an existing hydropower station in Nigeria

    Article • Clean Technologies and Environmental Policy, February 2023, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  54. The impact of the 2007–2008 global financial crisis on the multifractality of the Nigerian Stock Exchange

    Article • SN Business & Economics, January 2023, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  55. Comparative Study of Worst Month Rain Rate and Attenuation Statistics for Satellite Links in Nigeria

    Article • Radio Science, January 2023, American Geophysical Union (AGU)

    Dr. Samuel T Ogunjo, Professor Joseph Sunday Ojo

  56. Heatwave trends in Lagos state, Nigeria

    Article • January 2023, American Institute of Physics

    Noah Ojeyemi , Dr. Samuel T Ogunjo

  57. Variability of total column ozone over Nigeria

    Article • January 2023, American Institute of Physics

    Dr. Samuel T Ogunjo

  58. Nigerian women in physics: New and emerging challenges

    Article • January 2023, American Institute of Physics

    Dr. Samuel T Ogunjo

  59. Nonlinear and Multifractal Detrended Fluctuation Analysis of Radon Time Series in a Volcanic Touristic Cave

    Article • January 2023, Elsevier

    Dr. Samuel T Ogunjo

  60. Dynamical Complexity and Multifractal Analysis of Geomagnetic Activities at High Temporal Scales Over Three Solar Cycles

    Article • January 2023, Elsevier

    Dr. Samuel T Ogunjo

  61. Association Between Weather Parameters and SARS‐CoV‐2 Confirmed Cases in Two South African Cities

    Article • GeoHealth, November 2022, American Geophysical Union (AGU)

    Dr. Samuel T Ogunjo, Assistant Professor Adeyemi Olusola

  62. Nonlinear dynamics and multifractal analysis of minimum–maximum temperature and solar radiation over Lagos State, Nigeria

    Article • Acta Geophysica, August 2022, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  63. Active Control and Electronic Simulation of a Novel Fractional Order Chaotic Jerk System

    Article • August 2022, Research Square

    Dr. Samuel T Ogunjo

  64. Advanced Marine Predator Algorithm for Circular Antenna Array Pattern Synthesis

    Article • Sensors, August 2022, MDPI AG

    Dr. Samuel T Ogunjo

  65. Machine learning models for prediction of rainfall over Nigeria

    Article • Scientific African, July 2022, Elsevier

    Dr. Samuel T Ogunjo, Dr. Olusola Samuel Ojo

  66. Geomorphic covariance structures of selected channel morphological variables across the alluvial-bedrock continuum in the Upper Ogun River Basin, Southwestern Nigeria

    Article • June 2022, Copernicus GmbH

    Assistant Professor Adeyemi Olusola, Dr. Samuel T Ogunjo, olutoyin Adeola Fashae

  67. Evaluation of Monthly Precipitation Data from Three Gridded Climate Data Products over Nigeria

    Article • Remote Sensing in Earth Systems Sciences, June 2022, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  68. Evaluation of dry and wet spell events over West Africa using CORDEX-CORE regional climate models

    Article • Modeling Earth Systems and Environment, May 2022, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  69. Predicting COVID‐19 Cases From Atmospheric Parameters Using Machine Learning Approach

    Article • GeoHealth, April 2022, American Geophysical Union (AGU)

    Dr. Samuel T Ogunjo

  70. Modified hybrid combination synchronization of chaotic fractional order systems

    Article • Soft Computing, March 2022, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  71. Signature of teleconnection patterns in river discharge within the Niger Basin

    Article • Meteorology and Atmospheric Physics, March 2022, Springer Science + Business Media

    Assistant Professor Adeyemi Olusola, Dr. Samuel T Ogunjo

  72. Forecasting tropospheric wet delay using LSTM neural network

    Article • IOP Conference Series Earth and Environmental Science, March 2022, Institute of Physics Publishing

    Dr. Samuel T Ogunjo

  73. The role of meteorological variables and aerosols in the transmission of COVID‐19 during Harmattan Season

    Article • GeoHealth, January 2022, American Geophysical Union (AGU)

    Olumide Olaniyan , Dr. Samuel T Ogunjo

  74. Machine learning prediction of solar energy potential in Nigeria

    Article • January 2022, American Institute of Physics

    Dr. Samuel T Ogunjo

  75. Impact of global financial crisis on the complexity of emerging markets: Case study of the Nigerian Stock Exchange

    Article • Pramana, November 2021, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  76. Spatial variations in the trend of heatwave over West Africa

    Article • Journal of Physics Conference Series, October 2021, Institute of Physics Publishing

    Dr. Samuel T Ogunjo

  77. URSI-NG CONFERENCE 2021 ON THE FUTURE OF RADIO COMMUNICATION: PROSPECTS AND CHALLENGES

    Article • Journal of Physics Conference Series, October 2021, Institute of Physics Publishing

    Dr. Samuel T Ogunjo, Professor Joseph Sunday Ojo

  78. Tropospheric delay in microwave propagation in Nigeria

    Article • Arabian Journal of Geosciences, July 2021, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  79. Evolution of Dynamical Complexities in Geospace as Captured by Dst Over Four Solar Cycles 1964–2008.

    Article • Journal of Geophysical Research Space Physics, April 2021, American Geophysical Union (AGU)

    Dr. Samuel T Ogunjo

  80. Multifractal analysis of air and soil temperatures

    Article • Chaos An Interdisciplinary Journal of Nonlinear Science, March 2021, American Institute of Physics

    Dr. Samuel T Ogunjo

  81. Trends in extreme temperature indices over Lagos, Nigeria

    Article • IOP Conference Series Earth and Environmental Science, February 2021, Institute of Physics Publishing

    Dr. Samuel T Ogunjo

  82. Second-order Markov chain models of rainfall in Ibadan, Southwest Nigeria

    Article • IOP Conference Series Earth and Environmental Science, February 2021, Institute of Physics Publishing

    Dr. Samuel T Ogunjo

  83. Solar energy potentials in different climatic zones of Nigeria

    Article • IOP Conference Series Materials Science and Engineering, January 2021, Institute of Physics Publishing

    Dr. Samuel T Ogunjo

  84. Dynamics of Inter-community Spread of Covid-19

    Article • January 2021, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  85. Complexity of global sea surface temperature

    Article • December 2020, Indian Academy of Sciences

    Dr. Samuel T Ogunjo

  86. Multifractality in global sea surface temperature

    Article • December 2020, Indian Academy of Sciences

    Dr. Samuel T Ogunjo

  87. Multifractal Properties of Meteorological Drought at Different Time Scales in a Tropical Location

    Article • Fluctuation and Noise Letters, September 2020, World Scientific Pub Co Pte Lt

    Dr. Samuel T Ogunjo

  88. Impact of COVID -19 pandemic lockdown on distribution of inorganic pollutants in selected cities of Nigeria

    Article • Air Quality Atmosphere & Health, September 2020, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  89. Statistics of vertical refractivity gradient over Akure, Nigeria

    Article • August 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Dr. Samuel T Ogunjo

  90. Nonlinear characterization and interaction in teleconnection patterns

    Article • Advances in Space Research, April 2020, Elsevier

    Dr. Samuel T Ogunjo

  91. The Possibility Of Uniform Pseudo-Random Number Generation By A Group Of Humans

    Article • March 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Dr. Samuel T Ogunjo

  92. SPATIO-TEMPORAL VARIATION OF NONLINEARITY IN TROPOSPHERIC ZENITH WET DELAY OVER WEST AFRICA

    Article • Telecommunications and Radio Engineering, January 2020, Begell House

    Dr. Samuel T Ogunjo

  93. Chaos suppression in fractional order systems using state-dependent noise

    Article • SN Applied Sciences, November 2019, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  94. Chaotic signature of climate extremes

    Article • Theoretical and Applied Climatology, September 2019, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  95. Spatial Dynamical Complexity of Precipitation and Temperature Extremes over Africa and South America

    Article • Asia-Pacific Journal of Atmospheric Sciences, July 2019, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  96. Quantification of historical drought conditions over different climatic zones of Nigeria

    Article • Acta Geophysica, March 2019, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  97. Temporal variation of soil volumetric water content

    Article • January 2019, American Institute of Physics

    Dr. Samuel T Ogunjo

  98. Nigerian women in physics: Advances and challenges (2014–2017)

    Article • January 2019, American Institute of Physics

    Dr. Samuel T Ogunjo

  99. Distribution analysis and autoregressive modelling of ultraviolet radiation over Akure, Nigeria

    Article • International Journal of Environment and Health, January 2019, Inderscience Publishers

    Dr. Samuel T Ogunjo, Ayodeji Ashidi

  100. Assessing the Impact of Vegetation Cover on Total Column Ozone Over West Africa

    Article • December 2018, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  101. The Development of an Enhanced Biomass Gasifier Stove

    Article • Proceedings of the National Academy of Sciences India Section A Physical Sciences, December 2018, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  102. Les lapins nourris avec de l’amidon de manioc fermentée je résidus: Effet sur le rendement et l’état de santé

    Article • Archivos de Zootecnia, October 2018, Cordoba University Press (UCOPress)

    Johnson Oluwasola Agbede , Dr. Samuel T Ogunjo

  103. The Possibility of Uniform Pseudo-random Number Generation by a Group of Humans

    Article • October 2018, Center for Open Science

    Dr. Samuel T Ogunjo

  104. Bifurcation and mixed tracking of the discrete fractional LPA model

    Article • International Journal of Dynamics and Control, April 2018, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  105. Multiswitching Synchronization Between Chaotic Fractional Order Systems of Different Dimensions

    Article • January 2018, Elsevier

    Dr. Samuel T Ogunjo

  106. Thermodynamic properties of Al in ternary lead-free solder Al-Sn-Zn alloys

    Article • Materials Science-Poland, October 2017, De Gruyter

    Dr Yisau A Odusote, Dr. Samuel T Ogunjo

  107. Comparison of Three Different Synchronization Schemes for Fractional Chaotic Systems

    Article • January 2017, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  108. Dynamics of Delayed Memristive Systems in Combination Chaotic Circuits

    Article • January 2017, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  109. Quantification of scaling exponents and dynamical complexity of microwave refractivity in a tropical climate

    Article • Journal of Atmospheric and Solar-Terrestrial Physics, December 2016, Elsevier

    Dr. Samuel T Ogunjo

  110. Phase synchronization between tropospheric radio refractivity and rainfall amount in a tropical region

    Article • Journal of Atmospheric and Solar-Terrestrial Physics, November 2016, Elsevier

    Dr. Samuel T Ogunjo, Ayodeji Ashidi

  111. How predictable are temperature and rainfall over Nigeria?

    Article • Theoretical and Applied Climatology, July 2016, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  112. EEG CHARACTERIZATION USING NONLINEAR SIGNATURES

    Article • Frontiers in Human Neuroscience, January 2016, Frontiers

    Dr. Samuel T Ogunjo

  113. How predictable is solar radiation in Nigeria?

    Article • Theoretical and Applied Climatology, September 2015, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  114. Women in physics in Nigeria: Status, actions, and progress (2011–2014)

    Article • January 2015, American Institute of Physics

    Dr. Samuel T Ogunjo

  115. Increased-order generalized synchronization of chaotic and hyperchaotic systems

    Article • Pramana, September 2014, Springer Science + Business Media

    Dr. Samuel T Ogunjo

  116. Predicting radio refractivity using a stochastic model

    Article • August 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Dr. Samuel T Ogunjo, Professor Joseph Sunday Ojo

  117. VARIATIONS IN NON-LINEARITY IN VERTICAL DISTRIBUTION OF MICROWAVE RADIO REFRACTIVITY.

    Article • Progress In Electromagnetics Research M, January 2014, EMW Publishing

    Dr. Samuel T Ogunjo

  118. Reduced order hybrid function projective combination synchronization of three Josephson junctions

    Article • Archives of Control Sciences, January 2014, De Gruyter

    Dr. Samuel T Ogunjo

  119. Comparison of backstepping and modified active control in projective synchronization of chaos in an extended Bonhöffer–van der Pol oscillator

    Article • Pramana, April 2013, Springer Science + Business Media

    Dr. Samuel T Ogunjo