John D

Magnets

Sm₂Co₁₇ Sintered Magnet Supply Chain 2026: China Export Controls, Lynas, MP Materials, DFARS 252.225-7052, and Cobalt Repricing

SmCo magnets run F-35 hardware, Tomahawk seekers, and satellite pointing systems. No substitute exists above 200°C. China controls almost all supply.

Permaculture

Permaculture for Urban Food Production: Growing Potatoes in Small Balcony Containers

Learn how a simple balcony potato tub uses permaculture principles for small-scale urban food production in apartments.

Technoagriculture

How Fog Computing Powers Remote Agricultural IoT, Smart Farms, and Automated Indoor Farming

Fog computing helps remote farms process sensor data locally, reduce cloud dependence, and maintain resilient IoT automation.

Meshnetworking

Drone-Deployed Mesh Networks (2026): Emergency Communications, HAPS, Satellite Backhaul, and Disaster Response

Drone-deployed mesh networks combine UAVs, HAPS, and satellite backhaul to restore emergency communications after disasters.

Futurism

Vacuum-Splitting Warp Geometry: A Zero-Integral Toy Model for Exotic Stress-Energy Compensation

A speculative vacuum-splitting warp drive model exploring zero-integral stress-energy, negative energy limits, and QEI constraints.

Photonics

What Is Photonic Computing and Will It Replace GPUs? A Technical and Investment Assessment

Not yet replacing GPUs. Photonic interconnect has arrived and is scaling fast. Photonic tensor cores are 24 to 36 months behind on a good trajectory.

Astronomy

Gravitational Wave Communication: Can You Actually Use Spacetime Ripples to Send a Message?

A lab emitter radiates 10⁻²⁷ watts. LIGO detects black hole mergers at 10⁴⁹ watts. That 76-order gap is why gravitational wave communication is TRL 1.

Energy

Carbon-Neutral Synthetic Gasoline: Technology, Cost, and the Investment Case

The chemistry has worked since the 1920s. The energy efficiency is 9 to 16%. The cost is 5 to 8x fossil. Airlines, defense, and Porsche are buying it.

Minerals

Sangdong Tungsten Mine (2026): Non-China Supply, Defense Demand, and Allied Tungsten Reindustrialization

Sangdong is entering production as a major non-China tungsten source, with real value tied to ramp-up, recovery, and allied processing.

Magnets

NdFeB Permanent Magnets: China's Export Controls, the Global Supply Chain Crisis, and What Comes Next

Every F-35 contains 418 kg of rare earths. US-bound magnet shipments fell 93% in May 2025. China did not need to fire a shot.

Batteries

Solid-State Lithium Batteries in 2026: Are QuantumScape, Solid Power, and Factorial Worth the Investment Risk?

LFP cells cost USD 36/kWh in China. Nissan needs USD 65/kWh to break even on solid-state. That gap is the investment thesis, compressed to one number.

Quantum

Quantum Inertial Navigation for GNSS-Denied Environments: Can BEC and Cold-Atom Interferometry Replace GPS?

Not yet in full. Quantum clocks and gravimeters are already on submarines. A complete BEC-based IMU to replace GPS is 7 to 10 years out at minimum.