1. Give 3 examples of nanomaterials that differ in properties when at the nanoscale vs. bulk. 2. Define the pros and cons of top-down vs. bottom-up production processes. 3. Give 3 examples of (physical and/or chemical) processes that can be used to produce nanoscale powders. 4. What are the methods that can be used to stabilise colloidal nano-suspensions?

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1. Give a possible use of port migration in Chorus.

2. It is possible to send a message to a port group in Chorus. Does the message go to all the ports in the group, or to a randomly selected port?

3. Chorus has explicit calls to create and delete ports, but only a call for creating port groups (). Make an educated guess as to why there is no grpDelete.

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1. Give a way to multiply two complex numbers together using fewer than four integer multiplication operations.

2. How much storage would be used by the FFT' if we didn't circumvent the storage-management problem with the perfect shuffle?

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1. Given a system transfer function G(s) = 3s^3 + 2s^2 + s / s^6 + 4s^5+ 3s^4 + 2s^3 + s^2 + 2s + 6 Determine the steady state response of the system to an excitation: 8sin2t + 15sin3t 2. Construct root loci for (i) s^3 + s^2 + (K+2)s + 3K = 0 (ii) s^4 + 6s^3 + 9s^2 + K(s^2 + 4s + 5) = 0 (iii) s^3 + 5Ks^2 +10 = 0 (iv) s^5 + 2s^4 + 3s^3 +2s^2 + s + K = 0 3. Show that the system with rate feedback in Fig. P6.8a may be reduced to system shown in Fig. P6.8b 4. A linear control system is described by G(s) =10^4(s+1) / s^2 + 110s + 10s^3 (i) obtain Bode magnitude and phase plots (ii) calculate G(s) for w=50 and 1000 rad/s 5. Draw a generic block diagram of a closed loop controls system and describe each of the blocks. Document Preview:

Assignment: Control System Q 1. Q 2. Q 3. Q 4.Assignment: Control System Q 5. Q 6.Assignment: Control System Q 7. Q 8. Q 9.

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1) Given the file in C, create a new while (1) loop to contain a clear LCD followed by a for loop to print all the ASCII characters from 33 to 123. There should be exactly 0.20 second delay between characters being displayed. Make another one modifies the previous version such that the ASCII characters from 33 to 123 are each printed on the bottom line at column 3, but include the decimal and hexadecimal values of the characters, we can use printf(“%i%x%c”, i, i, i); where i is the loop variable. #include // library containing printf() function #include #include “osc.h” // library for set_osc_32MHz() #include “configureUSART.h” // library for configureUSART(baud) #pragma config WDT = OFF #pragma config OSC = INTIO7 // puts osc/4 on pin 14 to check freq #pragma config MCLRE = OFF #pragma config LVP = OFF #pragma config PBADEN = OFF // PORTB are digital IO void WaitOneSecond(void); void WaitQuarterSecond(void); void main(void) // a C project can only have one main() function { char string[] = ” APSC1299 “; // 16 chars wide to fill bottom line of LCD set_osc_32MHz(); // set MCU to run at 32 MHz // fOSC = 32 000 000 Hz // TOSC = 1/32 000 000 s = 31.25 ns // TCY = 4*TOSC = 125 ns configureUSART(9600ul, 32); // configure MCU serial communication module to run at 9600 baud // with MCU operating at 32 MHz. Defined in configureUSART.c // 9600 bits/s is default communication rate // other choices 2 400, 4 800, 19 200, 38 400 (not available at 1 MHz) // LCD will not work if MCU is not configured for USART _delay(100000ul); _delay(100000ul); _delay(100000ul); _delay(100000ul); _delay(100000ul); // small delay to wait for splash screen to appear ////////////////////////////////////////////////////////////////////////////////////////// // printf(“%c”,0x12); // reset LCD to default 9600 bps // // only works if run during splash screen. // // use only in case LCD was accidently set to another baud rate // // and is printing garbage // WaitOneSecond(); // Wait for reset message to complete // // LCD will not respond to printf() until it is finished. /////////////////////////////////////////////////////////////////////////////////////////// WaitOneSecond(); // The splash screen lasts about one second // LCD will not respond to printf() until it is finished. printf(“%c%c”,0xFE,0x01); //Command – clear and zero display //Not strictly necessary since splash clears itself printf(” Hello World “); // 16 chars wide to fill top line of LCD WaitOneSecond(); WaitOneSecond(); printf(“%s”,string); // 16 chars wide to fill bottom line of LCD WaitOneSecond(); WaitOneSecond(); while(1) { // MCUs run continuously so an endless loop is required. // Jiggle Message. printf(“%c%c”,0xFE, 0x1C); //move message right one column WaitQuarterSecond(); printf(“%c%c”,0xFE, 0x18); //move message left one column WaitQuarterSecond(); } } void WaitOneSecond(void) { int i = 0; for(i=0; i<=80; i++) { _delay(100000ul); // 100 000 * 4 / 32 000 000 = 1/80 s } } void WaitQuarterSecond(void) { int i = 0; for(i=0; i<=20; i++) { _delay(100000ul); // 100 000 * 4 / 32 000 000 = 1/80 s } }

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