OK so all diff and int commands were established in the first 3rd of the program. I'm still trying to figure out this iteration loop until time converges. Prof. Graham is now back in town, so we are trying to work out a good meet time.
I think the program is coming together (very) slowly but surely :) I'm off to enjoy the rest of my birthday week!! Until later....
"To know the history of science is to recognize the mortality of any claim to universal truth." ~Evelyn Fox Keller
Thursday, July 28, 2011
Tuesday, July 26, 2011
Day 22
I realized that my blog titles (you know the day #'s) is not accurate haha. But it doesn't matter that much I'm guess as long as I blog...right Prof Satchi?
Today I started implementing syms and diff commands. I ran the code, which worked, but I noticed one of the derivations returned a zero, which isn't supposed to happen. The equation is:
This is how all the equations are in the Growth & Coarsening section of the paper.Thanks to a colleague of mine he helped me realize the simplest thing I overlooked. And it's called an INTEGRAL!! Wow. Duh Gabi. I've got to take the integral. That was the LARGEST BRAIN FART OF MY LIFE!!
So now I'm going to use the int command and iterate t until convergence.
See you tomorrow!
"Science has made us gods even before we are worthy of being men." ~Jean Rostand
Today I started implementing syms and diff commands. I ran the code, which worked, but I noticed one of the derivations returned a zero, which isn't supposed to happen. The equation is:
This is how all the equations are in the Growth & Coarsening section of the paper.Thanks to a colleague of mine he helped me realize the simplest thing I overlooked. And it's called an INTEGRAL!! Wow. Duh Gabi. I've got to take the integral. That was the LARGEST BRAIN FART OF MY LIFE!!
So now I'm going to use the int command and iterate t until convergence.
See you tomorrow!
"Science has made us gods even before we are worthy of being men." ~Jean Rostand
Friday, July 22, 2011
Day 21
There is good good news and possibly good news. I'll divulge the good good news first.
Out of the 7 new articles I've found that referenced Deschamps only one paper clearly contains similar equations. Modeling of whole process of ageing precipitation and strengthening in Al-Cu-Mg-Ag alloys with high Cu-to-Mg mass ratio by the Hou et al group. The similarity of equations seems to be traced back to the Kampmann and Wagner group. This information is GREAT because now I know where Deschamps is getting their equations. Also the Hou paper gives FULL REFERENCES! As in includes titles of the articles, which is fabulous considering the last Kampmann paper I received was in GERMAN!! That's right...German. And the paper is 91 pages long. So, thank God I found it in English thanks to Hou. THANK YOU HOU!!
I've asked for the paper through Inter-library Loan, which I hope to receive by next week. The Hou paper is exactly what I am doing except with a different alloy. Hou is Al-Cu-Mg-Ag, while I am working with Al-Zn-Mg-Cu. The group stated that the results from their model in comparison to experimental data is in "good agreement", and they included the numbers! I am taking this as good news, because that may mean that once I get this program running the model will hopefully agree with Al7075 numbers.
Now for the possibly good news.
I know for a fact that I can use the syms, diff and subs commands, because a colleague of mine did the same with a code of his. I don't think I can do the entire code like this but I feel good knowing I can do some of the code like this. The difficulty I am coming up with is the iteration loop over time until it converges. I'm not sure when it converges (obviously), and I'm having difficulty writing the loop! There is something I am missing, but I'm not sure what it is. So, now is the time to get out my MATLAB for Dummies book. That's what I am going to do now.
I got a hold of Prof. Graham :) BUT he is in the Netherlands :/ I'm jealous not going to lie, but I digress. Even though he is in the Netherlands; he stated that he would be back next week. So, I will be trying my best to figure out this iteration/subs loop business until he returns to town.
I hope everyone has a wonderful Friday evening and a GREAT weekend!!!
"The scientist, by the very nature of his commitment, creates more and more questions, never fewer. Indeed the measure of our intellectual maturity, one philosopher suggests, is our capacity to feel less and less satisfied with our answers to better problems." ~G.W. Allport
Out of the 7 new articles I've found that referenced Deschamps only one paper clearly contains similar equations. Modeling of whole process of ageing precipitation and strengthening in Al-Cu-Mg-Ag alloys with high Cu-to-Mg mass ratio by the Hou et al group. The similarity of equations seems to be traced back to the Kampmann and Wagner group. This information is GREAT because now I know where Deschamps is getting their equations. Also the Hou paper gives FULL REFERENCES! As in includes titles of the articles, which is fabulous considering the last Kampmann paper I received was in GERMAN!! That's right...German. And the paper is 91 pages long. So, thank God I found it in English thanks to Hou. THANK YOU HOU!!
I've asked for the paper through Inter-library Loan, which I hope to receive by next week. The Hou paper is exactly what I am doing except with a different alloy. Hou is Al-Cu-Mg-Ag, while I am working with Al-Zn-Mg-Cu. The group stated that the results from their model in comparison to experimental data is in "good agreement", and they included the numbers! I am taking this as good news, because that may mean that once I get this program running the model will hopefully agree with Al7075 numbers.
Now for the possibly good news.
I know for a fact that I can use the syms, diff and subs commands, because a colleague of mine did the same with a code of his. I don't think I can do the entire code like this but I feel good knowing I can do some of the code like this. The difficulty I am coming up with is the iteration loop over time until it converges. I'm not sure when it converges (obviously), and I'm having difficulty writing the loop! There is something I am missing, but I'm not sure what it is. So, now is the time to get out my MATLAB for Dummies book. That's what I am going to do now.
I got a hold of Prof. Graham :) BUT he is in the Netherlands :/ I'm jealous not going to lie, but I digress. Even though he is in the Netherlands; he stated that he would be back next week. So, I will be trying my best to figure out this iteration/subs loop business until he returns to town.
I hope everyone has a wonderful Friday evening and a GREAT weekend!!!
"The scientist, by the very nature of his commitment, creates more and more questions, never fewer. Indeed the measure of our intellectual maturity, one philosopher suggests, is our capacity to feel less and less satisfied with our answers to better problems." ~G.W. Allport
Thursday, July 21, 2011
Day 20 -- Still the same, minus the bad day
I am feeling a bit more confident today. Prof. Graham aka MATLAB GENIUS is on board with helping me on my program, which is GREAT because I'll be able to bounce ideas off of him. AND he is the perfect person to break MATLAB down, because he does so in the type of English I can understand.
Also, I uncovered some very recently published articles that reference the Deschamps article to possibly shed light on how other research groups are fairing with this specific topic. I've got about 7 articles to read and Thank GOODNESS they are under 10 pages each :)
I've also checked out some books on Numerical methods for MATLAB in case I must use them in my program, which I hope Prof. Graham can help me with too.
Will post later...
"A scientist in his laboratory is not a mere technician: he is also a child confronting natural phenomena that impress him as though they were fairy tales." ~ Marie Curie
Also, I uncovered some very recently published articles that reference the Deschamps article to possibly shed light on how other research groups are fairing with this specific topic. I've got about 7 articles to read and Thank GOODNESS they are under 10 pages each :)
I've also checked out some books on Numerical methods for MATLAB in case I must use them in my program, which I hope Prof. Graham can help me with too.
Will post later...
"A scientist in his laboratory is not a mere technician: he is also a child confronting natural phenomena that impress him as though they were fairy tales." ~ Marie Curie
Tuesday, July 19, 2011
Day 17, 18, 19 -- There are good days...and then there are bad days
Again I haven't blogged every time I do research like I am supposed to, but here I am now!
So, I've recently met with Prof. Satchi and we discussed how to input most of the equations in this program. He stated I will need to use numerical methods, which I do not know much about. Case in point a trip to the school library will be useful and a discussion with a Professor of mine is much needed. Most of the equations are differential equations, which can be solved by MATLAB using the syms, diff and subs commands. However, most of these equations are based off a previous equation, meaning I solve for one variable, which is then used in the next equation so on and so forth. Also, I want to increment certain variables until I reach convergence. My question is am I able to bypass numerical methods and use the aforementioned commands and increment all at the same time.
I'm going to be honest with you...I am really lacking confidence in myself right now. Programming and MATLAB are NOT my strong suit, but I do know that I cannot give up simply because this is difficult. I knew this project wasn't going to be easy when I discussed it with Prof. Satchi and now is DEFINITELY NOT the time to quit.
I have a few days over a month to get this programming up and running. Therefore, I will shove these feelings into the back of my mind, get the help I need and push forward. Ergo, I will be back tomorrow and everyday after until I graduate: one day at a time. I leave you with something a bit uplifting....ENJOY!
"Strangers waiting
Up and down the boulevard
Their shadows searching in the night
Streetlight people
Living just to find emotion
Hiding somewhere in the night
Some were born to sing the blues
Oh, the movie never ends
It goes on and on and on and on
Strangers waiting
Up and down the boulevard
Their shadows searching in the night
Streetlight people
Living just to find emotion
Hiding somewhere in the night
Don't stop believin'
Hold on to that feelin'
Streetlight people
Don't stop believin'
Hold on
Streetlight people
Don't stop believin'
Hold on to that feelin'Streetlight people"
~JOURNEY
So, I've recently met with Prof. Satchi and we discussed how to input most of the equations in this program. He stated I will need to use numerical methods, which I do not know much about. Case in point a trip to the school library will be useful and a discussion with a Professor of mine is much needed. Most of the equations are differential equations, which can be solved by MATLAB using the syms, diff and subs commands. However, most of these equations are based off a previous equation, meaning I solve for one variable, which is then used in the next equation so on and so forth. Also, I want to increment certain variables until I reach convergence. My question is am I able to bypass numerical methods and use the aforementioned commands and increment all at the same time.
I'm going to be honest with you...I am really lacking confidence in myself right now. Programming and MATLAB are NOT my strong suit, but I do know that I cannot give up simply because this is difficult. I knew this project wasn't going to be easy when I discussed it with Prof. Satchi and now is DEFINITELY NOT the time to quit.
I have a few days over a month to get this programming up and running. Therefore, I will shove these feelings into the back of my mind, get the help I need and push forward. Ergo, I will be back tomorrow and everyday after until I graduate: one day at a time. I leave you with something a bit uplifting....ENJOY!
"Strangers waiting
Up and down the boulevard
Their shadows searching in the night
Streetlight people
Living just to find emotion
Hiding somewhere in the night
Working hard to get my fill
Everybody wants a thrill
Payin' anything to roll the dice just one more time
Some will win, some will loseEverybody wants a thrill
Payin' anything to roll the dice just one more time
Some were born to sing the blues
Oh, the movie never ends
It goes on and on and on and on
Strangers waiting
Up and down the boulevard
Their shadows searching in the night
Streetlight people
Living just to find emotion
Hiding somewhere in the night
Don't stop believin'
Hold on to that feelin'
Streetlight people
Don't stop believin'
Hold on
Streetlight people
Don't stop believin'
Hold on to that feelin'Streetlight people"
~JOURNEY
Monday, July 11, 2011
Day 16
Happy Monday!
I made progress but I hit a road block. There is an equation I am not sure how to input nor am I sure how to solve by hand. Therefore, I am set to figure this out with the help of my research adviser.
So I press onward and leave you with a wonderful author.
"There is nothing like looking, if you want to find something. You certainly usually find something, if you look, but it is not always quite the something you were after." ~ J.R.R. Tolkien
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