matlab 3.2

Question 1

interpolation

Answer 1

test other conditions to account for other possibilities, keeps the shape of the graph but smooths transition by reducing errors

Question 2

interp1(x, y, 3.4)

Answer 2

checks data and estimate y at x = 3.4

Question 3

cubic spline interpolation

Answer 3

smooths the curve and minimizes error

Question 4

linear regression

Answer 4

predicting the value of a variable based on value of other variables

Question 5

least squares fitting

Answer 5

finds best fit for data points by determining slope and intersection
minimize R

Question 6

resistance and current are ___ proportional to each other in electrical circuits

Answer 6

inversely

Question 7

I = ?

Answer 7

V/R
current is equal to voltage over resistance

Question 8

bioengineers

Answer 8

engineers that work in context of living or hybrid systems

Question 9

bioengineers use…

Answer 9

traditional engineering and knowledge of biology and medicine (biomaterials, bioinstrumentation, biosignal processing)

Question 10

system

Answer 10

any assembly of things that have a collective effect on the signal of interest

dumbed down:
stuff that effects what’s being recorded

Question 11

model

Answer 11

a representation of the original, aids in description of a body of data
more compact and helps gain insights

dumbed down: represents original and helps us describe the data and gain interests

Question 12

models can allow one to ___ the outcome of intermediate experiments

Answer 12

predict

Question 13

model is a symbolic representation of…

Answer 13

a process, system, or collection of data

Question 14

system identification and model formulation are ___ processes

Answer 14

iterative (it repeats over and over)

Question 15

process of system identification and model formation

Answer 15

measure, build model, test model, REPEAT

Question 16

what improves our observation of biological systems?

Answer 16

technological advancement

Question 17

how does tech advancement improve our observation of bio systems?

Answer 17

greater accuracy
greater precision
less invasive

results in better models

Question 18

what are the most valuable characteristics of a bioengineer?

Answer 18

artful construction and effective use of models

Question 19

biosignal

Answer 19

lets us interact/communicate with biosystems

Question 20

what are signals?

Answer 20

variations of energy that carry information

Question 21

types of signals

Answer 21

electrical, mechanical, thermal, optical, chemical, bio

Question 22

biosignals can be ___ directional to know the state of the system

Answer 22

one directional

Question 23

input-output system

Answer 23

send signal to the system for therapy or experimentation

Question 24

input -> physiological systen -> output
what is the input and output

Answer 24

stimulus and response

Question 25

chemical energy

Answer 25

variables: chemical activity and/or concentration
measurements: blood ion, O2, CO2, pH, horomonal concentrations, and otehr chemistry

Question 26

mechanical energy

Answer 26

variables: position, force, torque, or pressure
common measurements: muscle movement, cardiovascular pressures, muscle contracility, valve and other cardiac sounds

Question 27

electrical energy

Answer 27

variables: voltage (potential energy of charge carriers), current (charge carrier flow)
common measurements: EEG, ECG, EMG, EOG, etx

Question 28

thermal energy

Answer 28

variables: temperature
common measurements: body temperature

Question 29

communications inside the body are encoded in variations of ___ and ___ energy

Answer 29

electrical: flow or concentration of ion
chemical: variation of concentrations in blood (ex: hormones)

Question 30

in the outside world all communication is converted to ____ based signals

Answer 30

electrical

Question 31

transducer

Answer 31

device that converts energy from one form to another

Question 32

biotransducers

Answer 32

convert non-electrical energy to an electrical signal

Question 33

electrode converts ___ energy to an ____ signal

Answer 33

ionic energy to electronic signal

Question 34

purpose of biomedical transducers

Answer 34

convert energy in physioloical processes into energy that can be measured, displayed, and stored

Question 35

cardiac microphone

Answer 35

converts mechanical sound energy from heart into electrical signal

Question 36

sensitivity

Answer 36

change in output for a given change in input
change in y / change in x

Question 37

resoluion

Answer 37

smallest change in input that results in measurable changes in output

Question 38

linearity

Answer 38

consistency of the input-output relationship

Question 39

repeatability

Answer 39

expected difference in output for repeated measurements of same input

Question 40

noise

Answer 40

amount of change in output not related to change in input

Question 41

ECG

Answer 41

electrocardiogram (heart)

Question 42

EEG

Answer 42

electroencephalogram (brain)

Question 43

EMG

Answer 43

electromyogram (muscle)

Question 44

EOG

Answer 44

electrooculogram (eye)

Question 45

ERG

Answer 45

electrotrtinogram (retina)

Question 46

EGG

Answer 46

electrogastrogram (stomach)

Question 47

GSR

Answer 47

galvanic skin response (skin electrical activity)