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C C There are a total of 5 entries in the algebraic variable array. C There are a total of 1 entries in each of the rate and state variable arrays. C There are a total of 5 entries in the constant variable array. C C C ALGBRC(1) is V in component environment (millivolt). C VOI is t in component environment (millisec). C STATES(1) is n in component potassium_channel_n_gate (dimensionless). C ALGBRC(4) is i_K in component potassium_channel (microA_per_cm2). C CONSTS(1) is g_K in component potassium_channel (milliS_per_cm2). C CONSTS(2) is Ki in component potassium_channel (mM). C CONSTS(3) is Ko in component potassium_channel (mM). C CONSTS(4) is RTF in component potassium_channel (millivolt). C CONSTS(5) is E_K in component potassium_channel (millivolt). C ALGBRC(2) is K_conductance in component potassium_channel (milliS_per_cm2). C ALGBRC(3) is alpha_n in component potassium_channel_n_gate (per_millisec). C ALGBRC(5) is beta_n in component potassium_channel_n_gate (per_millisec). C RATES(1) is d/dt n in component potassium_channel_n_gate (dimensionless). C SUBROUTINE initConsts(CONSTS, RATES, STATES) REAL CONSTS(*), RATES(*), STATES(*) STATES(1) = 0.325 CONSTS(1) = 36 CONSTS(2) = 90 CONSTS(3) = 3 CONSTS(4) = 25 CONSTS(5) = CONSTS(4)*log(CONSTS(3)/CONSTS(2)) RETURN END SUBROUTINE computeRates(VOI, CONSTS, RATES, STATES, ALGBRC) REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*) ALGBRC(1) = TERNRY(VOI.GT.5.00000.AND.VOI.LT.15.0000, - 85.0000, 0.00000) ALGBRC(3) = ( 0.0100000*(ALGBRC(1)+10.0000))/(EXP((ALGBRC(1)+10.0000)/10.0000) - 1.00000) ALGBRC(5) = 0.125000*EXP(ALGBRC(1)/80.0000) RATES(1) = ALGBRC(3)*(1.00000 - STATES(1)) - ALGBRC(5)*STATES(1) RETURN END SUBROUTINE computeVariables(VOI, CONSTS, RATES, STATES, ALGBRC) REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*) ALGBRC(1) = TERNRY(VOI.GT.5.00000.AND.VOI.LT.15.0000, - 85.0000, 0.00000) ALGBRC(3) = ( 0.0100000*(ALGBRC(1)+10.0000))/(EXP((ALGBRC(1)+10.0000)/10.0000) - 1.00000) ALGBRC(5) = 0.125000*EXP(ALGBRC(1)/80.0000) ALGBRC(2) = CONSTS(1)*STATES(1) ** 4.00000 ALGBRC(4) = ALGBRC(2)*(ALGBRC(1) - CONSTS(5)) RETURN END REAL FUNCTION TERNRY(TEST, VALA, VALB) LOGICAL TEST REAL VALA, VALB IF (TEST) THEN TERNRY = VALA ELSE TERNRY = VALB ENDIF RETURN END