By Henry Wong and Grant Elliott
Answer: IN FLUX

Each component puzzle answer is a two-word phrase. Their initials form ISO 3166 Alpha-2 country codes (“the undiscovered country”). Each of these countries has a flag consisting of three stripes with resistor code colors (the “declarations of the Borg” are that “resistance is futile”).

Puzzle ID Answer Country code Country Resistor color
A1 MISFIT MATHEMATICIANS MM Myanmar 4500 Ohm
A2 FEDERAL RESOURCES FR France 6900 Ohm
A3 AUSTERE TYPEFACE AT Austria 2900 Ohm
A4 INITIAL THREAT IT Italy 5900 Ohm
A5 TAX DOCUMENTS TD Chad 6400 Ohm
A6 INLAID EMBLEM IE Ireland 59000 Ohm
A7 VIRTUALIZED ENVIRONMENT VE Venezuela 4600 Ohm
A8 PAIRWISE EXPANSION PE Peru 2900 Ohm
A9 BLACK OPERATION BO Bolivia 2400000 Ohm
A10 COLOR MICROGRAPHY CM Cameroon 520000 Ohm
A11 RECREATIONAL USE RU Russia 9600 Ohm
A12 ANATOMICAL DEMONSTRATIONS AD Andorra 6400 Ohm
A13 INTRACTABLE QUESTION IQ Iraq 29 Ohm
A14 ETRUSCAN GOD EG Egypt 29 Ohm
A15 SMALL NOVEL SN Senegal 5400 Ohm
A16 GERI HALLIWELL GH Ghana 2400000 Ohm
A17 LABORATORY TECHNOLOGISTS LT Lithuania 4500 Ohm
A18 IMPROVISED RAFT IR Iran 5900 Ohm

The Substation meta answers are names of Star Trek television episodes in which the stardate is specified unambiguously. The stardates function as voltages.

Meta ID Answer Voltage
D1 INTERFACE 47215.5 V
D2 EMANATIONS 48623.5 V
D3 REAL LIFE 50836.2 V
D4 MERIDIAN 48423.2 V
D5 EVOLUTION 43125.8 V
D6 PRIME FACTORS 48642.5 V

Interpreting the tunnel network as a circuit comprised of resistors and power supplies yields:

Solving for the power supply currents yields results very close to integral amperes:

Meta ID Current Letter
D1 9.004484 A I
D2 14.005170 A N
D3 6.004262 A F
D4 12.001309 A L
D5 21.006291 A U
D6 24.001302 A X

And so, you can find this core memory IN FLUX.