Interdisciplinary Studies:

I have done some studies in various fields besides physics:

• Triple Threats for the Human Future: Will Civilization Arrive? (4 Megabytes)
• Triple Threats for the Human Future: Forward, Preface, Contents and Figure Captions
• Priorities in a Society
• L. David Roper letters and editorials in The Roanoke Times
• Compilation of Blacksburg Cool Cities Messages
• Graphically Speaking Project about the Environment Explaination about a single graph
• Entropy, Complexity and Sustainable Development
• Stock Market as States' Changes
• Peace and Energy
• World Population Projection
• Entropy, Complexity and Sustainable Development
• Human Intelligence Evolution
• Silicon Intelligence Evolution
• Goiânia Radiation Incident
• Income Distribution in the United States
• Income Distribution Complex Web
• Prime-Rate Projection
• Life Expectancy in the United States
• U.S. is Becoming a Third-Rate Country
• Steady-State Economy
• Twenty-First Century Collapse
• Politics
• Prices
• High Gasoline Price is Good
• Home Energy Usage (TED, The Energy Detective)
• House Energy Renovation
• Energy Conservation for Renters
• Energy Investments for Buildings and Communities
• Currency System Based on Energy Consumed
• Vehicle Miles Traveled (VMT) in the United States
• Peak Fishing
• Peak Agriculture
• Correlation Studies of Academic Excellence and Big-Time Athletics, L. David Roper and Keith Snow, International Review of Sport Sociology 3 (11) 1976 pp. 57-69. (940 kbytes)
• Radioactive Weapons
• Crops Production in the World and the United States
• World Ammonia Production
• Solitary Bees
• Water
• Aquifers in the United States
• Guarani Aquifer in South America
• Minerals Depletion (many web pages)
• Energy (many Web pages)
• Toward U.S. Energy Independence
• Electricity Production in the United States
• http://www.roperld.com/science/minerals/Oil_USGasolinePricesPrediction.htm
• Coles Hill Uranium Mine Depletion Study
• Landscape Destruction due to Energy Extraction
• World Wind
• The Solar Future: Why Solar Energy Must Run the World
• Blacksburg Wind & Solar Power Educational Project
• YMCA Solar Greenhouse
• Roper Photovoltaic System
• Roper Rheem Hybrid Hot Water Heater
• Roper House Battery Backup System
• Roper Light Tube
• Some Earth Limits
• Global Warming (many web pages)
• Global Heat Pollution
• Major Ice Ages (many web pages)
• Ocean Currents
• Sunspots Numbers Fit
• Evaporation and Precipitation Versus Latitude
• Precipitation Patterns due to Global Heating
• Precipitation Rates Versus Latitude and Longitude
• Extreme Weather
• Extreme Weather: Tornadoes
• Droughts in the United States
• Mathematics
• The Hyperbolic Tangent World (Many examples in nature)
• The Verhulst Function
• Realistic Functions for Nonlinear Systems
• Model for mutual positive feedback for two variables
• Using Sigmoid and Double-Sigmoid Functions for Earth-States Transition
• Mathematical Analysis of Covid-19 (coronavirus19) in USA and other countries
• Spherical Bessel Functions
• Global Warming Mathematics
• Solar Insolation Computer Codes for Windows
• Displaying Mathematical Equations in Web Browsers on the Internet
• Using the Amaya Editor/Browser for XML/MathML to Display and Use Mathematics on the Web
• Nerve Excitation
• Nerve Excitation
• Rationalizing the Hodgkin-Huxley Equations for Nerve Excitation
• Theory of Excitable Membranes
• Fuel Cells are not Pollution Free: Where Will the Water Go?
• GBE M20 folding electric-assisted bicycle
• Hybrid and Electric Vehicles
• Musings about Electric Vehicles
• Vehicle Miles Traveled (VMT) in the United States
• Financing Highways
• Interstate Railway System for the United States
• Composting the Easy Way
• Curbside Composting
• Rain Barrels
• Dry Wells
• The Cordless Revolution
• Electromagnetic Spectra of Light Bulbs
• Recommendations for LED light bulbs
• Green Businesses in the New River Valley of Virginia
• Links for The Bible According to Einstein
• Evolution of Beliefs, a sermon delivered at Christ Episcopal Church, Blacksburg VA on 25 February 2001
• Homo sapiens Events
• Green or Natural Burial
• Health
• RET Proto-Oncogene (Chromosome 10) and Medullary Thyroid Cancer
• Spondylolysis and Spondylolisthesis
• Trochanteric Bursitis
• Lumbar Decompression (Laminectomy)
• A mathematical analysis of Covid-19 virus pandemic
• Virginia state analysis
• New York state analysis
• Talk about SETI (Search for Extra-Terrestrial Intelligence)

L. David Roper, http://arts.bev.net/roperldavid/