Andrew Hsiau
BME 140
Homework #1
1. (a) The total flow of an ion across a membrane is the sum of the flow of ions due to diffusion
and the flow of ions due to drift in an electric field. Therefore, for a membrane that is permeable
only to Ca2+, the expres
Andrew Hsiau
BME 140
Homework #4
10/8/2003
1.
(a) Before the exercises, outer diameter = .03 m, and inner diameter = .015 m.
before the exercises, the cross sectional area is (.015 m) (.0075 m) .
stress
800 N
2
N
754,512 m
(.0075m)
(.015m)
After the exer
Andrew Hsiau
BME 140
Homework #3
1. (a) Governing equation for the Maxwell model of a viscoelastic material.
Spring force, Fs=kLs, where k is the spring constant and Ls is the spring length
Dampener force, Fd
v
dLd
, where v is the dampener constant, and
Andrew Hsiau
BME 140 HW#5
11/3/2003
1.
(a) A covalent bond occurs when atoms share electrons to complete their electron octets.
For example, covalent bonding occurs in the molecule H2. Depending on the atoms
involved in the covalent bond, the approximate
Andrew Hsiau
BME 140 hw#7
12/3/2003
1.
(a) Several steps occur during normal wound healing, starting with the congregating of
platelets at the wound site, which helps to stop bleeding by a tissue matrix, as well as
increasing blood flow and recruitment of
Andrew Hsiau
BME 140 HW #6
11/12/2003
1.
(a) Drawing of two different base pairs for a section of DNA, showing the atoms involved in the
hydrogen bonds
(b) Drawing of the same two different base pairs when transcription occurs.
2.
(a) Structure of typical
CORRECTED VERSION
Andrew Hsiau
BME 140
Homework #2
1. (a)
Fast Fourier Transform of baseline signal of pure sinusoidal wave of frequency 2 Hz:
Hz
(b) Neuron is stimulated and increases output to a combined sine wave with frequencies of 5 Hz
and 10 Hz. FFT
BME 140: Matlab Assignment #3: Emergent properties of networks
Group 16
Problem 1
a) The figure for aNS has half the number of edges than a figure of a. the figure for a has
an edge coming to a node for every e