The Designed World
What the domain covers
The Designed World surveys the major technological systems: medical, agricultural, energy and power, information and communication, transportation, manufacturing, and construction. Items test how each system converts resources, its core principles, and its trade-offs.
Core rules
- Medical technologies span prevention, diagnosis, treatment, and rehabilitation; ethical issues include privacy, access, and informed consent.
- Agricultural technologies include cultivation, processing, storage, and biotechnology; precision agriculture uses data to target inputs.
- Energy is the capacity to do work; power is energy per unit time. Energy sources are renewable or nonrenewable, and conversion always loses some energy.
- Information and communication systems encode, transmit, store, and process data; bandwidth limits throughput; digital signals are sampled and quantized.
- Transportation systems combine propulsion, guidance, control, and infrastructure across land, water, air, and space.
- Manufacturing converts materials into products through forming, separating, joining, and conditioning; construction builds structures and infrastructure under codes.
Worked example
A rooftop solar system. Photovoltaic cells convert light to DC electricity. An inverter converts DC to AC for the building or grid. Losses occur at the panels, wiring, and inverter, so output is less than the rated peak. Storage or net metering manages mismatch between generation and demand. The trade-off is high upfront cost and variable output versus low operating emissions.
Traps that cost marks
Using energy and power interchangeably; assuming renewable systems have no environmental impact; and describing communication as only devices rather than encoding, transmission, storage, and processing.