text:
User:ARoberts/enes100/HEMI

Link to Team HEMI Page

Write problem statement
The Stirling engine is an external combustion engine. In our project, we will find a way to make it generate enough power to move a set of wheels allowing independent movement.

 * Example of Stirling Engine Motor

Compare actual work done to Task1
In week 1, we tinkered around with the model engines that were already available to us to see if we could get it to run as is. We were able to get one to run with much assistance eventually. We thought that steam would be a better gas to use in the combustion process but we have no way of trapping steam in the cylinder for use. Air seems to be a better gas to use and placing water inside the cylinder to boil is not a good idea, nor allowed.

Week1 Narrative

 * Putting water inside the cylinder is not a good idea.
 * But we were not very successful with getting it to run just off of air.
 * I believe this is because the cylinder is not airtight so most of the energy that is produced is lost before it can start a cycle.
 * I suggest we find a way to make it airtight. That should solve our problem.

 * Another hypothesis is that we are not generating enough heat to heat the air but the videos that have portrayed a Stirling engine successfully have used flames from candles.
 * We even used the blow torch to no discernible difference or help.

Assign Task2
I plan to look into other successfully running Stirling engines to see what aspects they used that we could incorporate. Mainly, the types of gases used like air vs. nitrogen. Also, to find the actual numbers that proves air is a good gas to use. I believe it has to do with the specific heat capacity of gasses.

Compare actual work done to Task2
We worked on the engine more to make it work better with just air in the pressure chamber. The metal of the chamber had seem to expand and meld to the metal around it. This helped to block some of the air from escaping, so it worked to our favor in a way. We were able to get more movement out of the engine and even able to start movement without our having to move it first.

Week2 Narrative
Model homemade Stirling engine Motor

Week2 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:32, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task3
Since we don't seem to be making any significant progress in our project. We have been tasked with all building our own versions of stirling engine's at home and then compare our designs in class. We use the best out of all of them to build a functioning engine.

Compare actual work done to Task3
I am working on my own design of a homemade engine using materials that I have at my disposal.

Week3 Narrative
Initially, I am finding it hard to make the pieces I need because I do not have proper tools to cut through metal smoothly. Once I do get past this problem, I have looked at several different designs on youtube of people who have successfully made homemade engines before. It seems that the easiest idea would be to make 2 seperate chambers for the pistons insted of filling it into one space.

Week3 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:33, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task4
Record what you are planning on doing for the team during the weekend between week3 and week4 of the project here.

Compare actual work done to Task4
Rationalize differences

Week4 Narrative
Upload photos to wikimedia. Upload video to youtube. Convert all spreadsheets, documents, and presentations to wiki format and create wiki subpage of your page for each of them. Link to them here in a narrative that tells a story. High light the problems (engineering problems) you had and how you solved them.

Week4 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:33, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Complete Project Page
Follow the "project done" format.

Start Next Project Week0 activities
During this week you will perform the week0 activities of the next project.

title: User:ARoberts/enes100/HEMI


text:
User:Hkang0839/501 BBotz

Give instructor top 3 project choice list
Typically the instructor picks teams. Students send the instructor their top 3 choices. The project choices are typically those found at Category:General_Engineering_Projects. The instructor tries to put students in the project of their choice. Put your top three choices here after they are used to assign you to this project. Create a link to the project root and to where your team will be working.

Write problem statement
Look through the existing problem statements. Find something not yet done on the project. Create a problem statement for it. Think of a new subsystem that needs to be built for the project. The goal is something simple, possible, for zero dollars.

Assign Task1
Tasks are typically done over the weekend. They are documented during the week, presented during the week and the next weekends work is negotiated during the week. Week 0 is the week that task 1 is negotiated. Record your individual task here. Plan on working on it during the weekend between week0 and week1.

Compare actual work done to Task1
Rationalize differences

Week1 Narrative
Upload photos to wikimedia. Upload video to youtube. Convert all spreadsheets, documents, and presentations to wiki format and create wiki subpage of your page for each of them. Link to them here in a narrative that tells a story. High light the problems (engineering problems) you had and how you solved them.

Week1 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:32, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task2
Record what you are planning on doing for the team during the weekend between week1 and week2 of the project here.

Compare actual work done to Task2
Rationalize differences

Week2 Narrative
Upload photos to wikimedia. Upload video to youtube. Convert all spreadsheets, documents, and presentations to wiki format and create wiki subpage of your page for each of them. Link to them here in a narrative that tells a story. High light the problems (engineering problems) you had and how you solved them.

Week2 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:32, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task3
Record what you are planning on doing for the team during the weekend between week2 and week3 of the project here.

Compare actual work done to Task3
Rationalize differences

Week3 Narrative
Upload photos to wikimedia. Upload video to youtube. Convert all spreadsheets, documents, and presentations to wiki format and create wiki subpage of your page for each of them. Link to them here in a narrative that tells a story. High light the problems (engineering problems) you had and how you solved them.

Week3 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:33, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task4
Record what you are planning on doing for the team during the weekend between week3 and week4 of the project here.

Compare actual work done to Task4
Rationalize differences

Week4 Narrative
Upload photos to wikimedia. Upload video to youtube. Convert all spreadsheets, documents, and presentations to wiki format and create wiki subpage of your page for each of them. Link to them here in a narrative that tells a story. High light the problems (engineering problems) you had and how you solved them.

Week4 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:33, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Complete Project Page
Follow the "project done" format.

Start Next Project Week0 activities
During this week you will perform the week0 activities of the next project.

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/

title: User:Hkang0839/501 BBotz


text:
User:Drew Dollas/enes100/glorious

Link back to team page Glorious

This is where work on my Hover Craft project exists.

Give instructor top 3 project choice list
1. Hovercraft 2. Robot End effector 3. Robot arm 4. Door access

Write problem statement
Make a HoverCraft with an autopilot and sensors that can avoid people yet travel down a crowded school coorridor.

Assign Task1
To look up information on the hovercraft to better understand the entire project, and for me to go out to Joan's to buy a good piece of Styrofoam for our base.

Compare actual work done to Task1
I already understood how a hover craft works for the most part. But what I did not understand, was how the remote control works. I found out it had something to do with radio waves. But my team and I had decided to just use remote control car remotes instead, so now I do not have to try to figure out how it works. Also, I successfully obtained a good piece of Styrofoam for our base. And it came wrapped already in plastic, so we are just going to use that as our skirt.

Week1 Narrative
My teammates and I got the first parts of the hover craft done. The holes through the bottom of the hover craft for the two fans blowing downward have been cut. And the skirt has been tested, and it works well. We needed sensors for our hover craft. And after asking, I found out that we may be able to use the sensors from those Lego robots.

Week1 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:32, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task2
I am planning on making sure my wiki page is up to date, and we decided that we need to mostly just work on building the hover craft for right now, and I am in North Carolina this weekend, so I cannot meet with them to build it. So we will just continue putting stuff on the hover craft next class.

Compare actual work done to Task2
I glued down the fans

Week2 Narrative
I uploaded two pictures onto our team page.

Assign Task3
I am trying to use the ATI remote to control our hovercraft. But I am having difficulty getting it to work. I took it home and was messing with it, but I was not able to figure anything out that will help our hover craft.

Compare actual work done to Task3
Trying to plug the USB from the ATI remote receiver directly into the Arduino was too confusing for me, so I cut off the USB portion and used just the wires to try to get something working. Having the different wires in the different spots on the Arduino board did make a difference in the lights on the Arduino board. I pulled up the data sheet of the main IC of the ATI reciever. And it seemed to be a D flipflop of some sort, because there is a D+ and a D- wires for me to attach where I want.

Assign Task4
To continue working with the ATI receiver, and to hopefully get the receiver to react with the Arduino by just pressing buttons on the remote.

Compare actual work done to Task4
I tried putting the wires from the receiver of the ATI remote straight into a bread board and having them turn on an LED using the remote. But I could not get it to work, so I still have not made any progress with this remote.

Week4 Narrative
When I came to class, I saw that we finally got the remote controlled cars in. So I took one of the cars apart and started to try to put the wires from the receiver straight into a bread board to light up an LED to see if I could get it working, but I ran out of time to ee if I could actually get anything working.

Complete Project Page
Link to team page Glorious

Start Next Project Week0 activities
I will try to get the receiver from the remote controlled car to at least turn on and off an LED remotely.

title: User:Drew Dollas/enes100/glorious


text:
User:Hkang0839/enes100/Ballbot

Link back to team BBotz

Give instructor top 3 project choice list
My top three project choices were Strandbeest, biofeedback, and ballbot, in that order. The project I am currently working on is Ballbot. Our team name is called Bbotz.

Write problem statement
The goal is to make the Ballbot stand on its head and remotely rotate a basketball balanced in its wheels.

Assign Task1
I took pictures of the Ballbots

Compare actual work done to Task1
Learned to upload photos on wiki media

Week1 Narrative
I have Uploaded all the photos to wikimedia. http://commons.wikimedia.org/wiki/Category:Ballbot Upload photos to wikimedia. Had problems of getting pictures being banned because of the name.

Week1 Peer Review
Went to each team mates weekly summary wiki page. Read their activities and narrative. Then went to the associated discussion page. Said something positive on the page. Added my name and 9/19/2011, good job on helping with naming the parts of the Ballbot Kang 20:32, 19 September 2011 (UTC)

Assign Task2
The team have just started to plan things about our project. One of the team member wasn't here last class when the team was being assigned and the time frame was to short.

Compare actual work done to Task2
Got sick over the weekend. will try to put more effort to make up. Did some research on youtube over the weekend about diferent ways we build the robot. Wrote this in my notebook. We are trying to get another wowwee robot and take it apart and build our own.

Week2 Narrative
We asked our professor to order more wowwee robot so we can get started on building out robot. For the rest of the week we will try to work the remote and build a stance to keep the robot still on a flat surface. We realize we couldnt do anything yet without the robot so we are going to pull some ideas over the weekend. Teddy and I are going to idvidually build a base or create something to hold the wheel. Corey is going to work on the remote.

Week2 Peer Review
Went to each team mates weekly summary wiki page. Read their activities and narrative. Then went to the associated discussion page. Said something positive on the page. Added my name and 9/26/2011, good job on the pictures Kang 20:32, 19 September 2011 (UTC) commented on team

Assign Task3
To discuss with the team member. Our conclusion is to work indvidually over the weekend and combine or compare it together on monday when the wowwee robot gets in.

Compare actual work done to Task3
Thought of different ways to use the base but failed. The metal bins would be to hard.

Week3 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:33, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task4
The "ballbot" came in on Monday but instead of what we need was a minibot. We took it apart and took the motor out but realize everything is useless. This week, we hope that the second ballbot will be better. For the week and the weekend we will try to finish up the project.

Today, I messed around with motor.

Compare actual work done to Task4
Rationalize differences

Week4 Narrative
Upload photos to wikimedia. Upload video to youtube. Convert all spreadsheets, documents, and presentations to wiki format and create wiki subpage of your page for each of them. Link to them here in a narrative that tells a story. High light the problems (engineering problems) you had and how you solved them.

Week4 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:33, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Complete Project Page
Follow the "project done" format.

Start Next Project Week0 activities
During this week you will perform the week0 activities of the next project.

title: User:Hkang0839/enes100/Ballbot


text:
User:Thanson2045/enes100/Ballbot

Link back to team BBotz

Give instructor top 3 project choice list
1. Ballbot

2. Hovercraft

3. Strandbeast

Write problem statement
My goal is to make the Ballbot stand on its head and remotely rotate a basketball balanced in its wheels.

Week1 Activities
Rationalize differences

Week1 Narrative
I spent classtime learning the very basics of the Arduino and toying with some of the example scripts and plan to delve further into the Arduino over the weekend. Ended up taking home the Vernier system instead at the advice of Professor Foerster.

Week1 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:32, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task2
Learn some of the language of the Vernier system and come up with a basic idea on how to write a program that will detect shadows from the spinning disc attached to the wheel motor.

Compare actual work done to Task2
Made little headway over the weekend with the Vernier system. Will continue work in-class this week.

Week2 Narrative
Diagnosed that the project cannot move forward with the current parts available. I emailed Professor Foerster a link to purchase additional Wowee Tribot(s). Began initial design and planning for how the Tribot will be modified to support the ball and remain steady.

Week2 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:32, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task3
Continue designing a base to mount the wheels on and hold up the basketball.

Compare actual work done to Task3
Got a preliminary design made. Next step is to find suitable materials.

Week3 Narrative
The ballbots that were ordered were the miniature version and therefore useless for my project. Dismantled the parts to try and see if there was anything worth scavenging. Provided nothing of use to push the project forward.

Week3 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:33, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task4
Record what you are planning on doing for the team during the weekend between week3 and week4 of the project here.

Compare actual work done to Task4
Rationalize differences

Week4 Narrative
Finally got a full-sized version of a ballbot and used the romote in order to learn the controls and functions of the ballbot before removing the body and solely using the wheels as a base to put a ball on top of.

Week4 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:33, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Complete Project Page
The project was not completed within the four weeks. Various issues arose around the lack of parts and obtaining an entirely new ballbot to work with. I plan to continue on this project for the next four week cycle so that I can accomplish my goals.

Start Next Project Week0 activities
During this week you will perform the week0 activities of the next project.

title: User:Thanson2045/enes100/Ballbot


text:
User:Gpforty2/enes100/poppit

Link to project trees team page.

Poblem Statement
That there are unknown strategies for the game Poppit. We would like to research, develop and test ideas for effective popping strategies, then evaluate which are most effective. Strategies will be procedure driven and executed in an algorithm to promote consistency.

Assign Task1
My task this week was to brainstorm about possible strategies for Poppit. These would be focued on different methods for attacking the problem.

Compare actual work done to Task1
During the first weekend I was able to document eight different methods for playing Poppit. To help illustrate my designs to my teammates I wrote a summary document explaining my various ideas. The ideas ranged from popping balloons based on their chunk size, color, and their respective positions on the game board.

Week1 Narrative
Summary Document

Week1 Peer Review
Post comments here.

Assign Task2
The next step would to be to perfect the algorithims. Once perfected the algorithims would need to be tested against the human average to see which if any performed above the human average.

title: User:Gpforty2/enes100/poppit


text:
User:Egm6321.f11.team1.zheng.zx/personal place

HW6

HW5

HW4

HW3

HW2

Experimental Site

Egm6321.f11.team1.zheng.zx 23:36, 20 September 2011 (UTC)


text:
User:Egm6321.f11.team1.zheng.zx/personal place/test

 * {| style="width:100%" border="0"

$$  \displaystyle \eta :=  \left(      \frac{\nu^3}{\epsilon}   \right)^{1/4} $$     (1)
 * style="width:95%" |
 * style="width:95%" |
 *
 * }


text:
User:Cdiffendal7527/enes100/HEMI

Link to HEMI

The stiriling engine needs to propel itself
For our project on the stirling engine, we want to put the engine on a set of wheels and see if we can have the motor produce enough energy to propel itself. What we need to consider is how much the engine and the assembly that the egine sits on will weigh versus how much weight the engine can move.

Week1 Narrative
I began to play around with an already existing stirling engine to figure out its potential and how much energy it will take to make the engine run. I want to find a way to make the the stiriling engine in our class room more efficient and find out ho to make it power a set of wheels and drive on its own. a problem that I ran into was that the engine would not be powered by just a candles flame, I had to use a propane torch to heat up the compression chamber enough to make the gases expand with enough force to turn the wheel. I took the engine apart and found there was a serious lack of lubrication on all metal to metal contact points, which are the surface to surface points on the engine. Now the engine operates smoothly.

The Engine needs to run off candle power
I plan to find out why the engine wont reach the estimated 3000 rpms on candle power as in the this video.

Compare actual work done to Task2
Rationalize differences

Week2 Narrative
After looking around the internet I found nothing on other Stirling Engines that was different to ours. The crank shaft arms are positioned at 90 degrees from each other and every friction point on the engine was sufficiently lubed using motor oil. So my team mates and I went on with trying to find out why the engine would not reach its maximum potential using a candle flame. I pulled the crank arms away from each other on the shaft then re-tightened them, this reduced the friction on them but not enough to allow the candle to power the engine. I had to revert to the propane torch to provide more heat. Consequently the torch heated the entire engine to much and didn't allow the cylinder that should be cool to stay cool thus slowing down the performance of the motor. Also the displacer separated form the puch rod causing the engine to lock up. I simply replaced the whole displacer and push rod assembly with a new one from another engine. This allowed the candle to power the engine but its RPMs were still very low.

Week2 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:32, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task3
I will figure out some idea to create a cooling system for the cylinder that is not in contact with the flame. Also I need to find out if a way to make the system as light as possible so the engine can still propel itself when it is put on its wheels.

Compare actual work done to Task3
I decided to scrap the idea of playing around with a pre-made engine that just wont work right and build my own Stirling Engine.

Week3 Narrative
I started the week off by trying to get the engine to run off candle power but just like the previous two weeks I was hopelessly attempting to get the make the motor work, in the end I thought enough was enough and I began to build my own Stirling Engine. I ended up just using everyday things found around the house. Things like tin cans, styrofoam, duct tape, aluminum foil and something not common around most houses, TIG welding rods. I used the TIG rods because the are about the same weight as wire coat hangers but they are many times stronger and more sturdy. I made a compression cylinder out of a tin food can, then I made displacers out of styrofoam and the push rods and crank shaft are made from the TIG welding rods. The foam had too much friction against the inside of the tin can so I covered the foam in aluminum foil to create less friction and make a better seal against the walls of the can. After adding the foil, the operation of the Stirling Engine was very smooth and required less energy for everything to move which will be good when using low heat as my power source. I still have yet to attach the crank shaft to the push rods and operate the motor, that will be saved for a new week.

Week3 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:33, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task4
I am going to attach the crank shaft and see if I can make my own home made engine run off candle power.

Compare actual work done to Task4
I found that the engine I made was not air tight where the power piston is so attaching the crank shaft would have been pointless because no power would be made.

Week4 Narrative
Upload photos to wikimedia. Upload video to youtube. Convert all spreadsheets, documents, and presentations to wiki format and create wiki subpage of your page for each of them. Link to them here in a narrative that tells a story. High light the problems (engineering problems) you had and how you solved them.

Week4 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:33, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.

Complete Project Page
Follow the "project done" format.

title: User:Cdiffendal7527/enes100/HEMI


title: File:Pea1.f11.mtg12.djvu


text:
User talk:Gpforty2

 Hello Gpforty2, and welcome to Wikiversity! If you need help, feel free to visit my talk page, or contact us and ask questions. After you leave a comment on a talk page, remember to sign and date; it helps everyone follow the threads of the discussion. The signature icon in the edit window makes it simple. All users are expected to abide by our Privacy policy, Civility policy, and the Terms of Use while at Wikiversity.

To get started, you may

 * Take a guided tour and learn to edit.
 * Visit a (kind of) random project.
 * Browse Wikiversity, or visit a portal corresponding to your educational level: pre-school, primary, secondary, tertiary, non-formal education.
 * Find out about research activities on Wikiversity.
 * Explore Wikiversity with the links to your left.

 * Read an introduction for teachers and find out how to write an educational resource for Wikiversity.
 * Give feedback about your initial observations
 * Discuss Wikiversity issues or ask questions at the colloquium.
 * Chat with other Wikiversitans on #wikiversity-en.
 * Follow Wikiversity on twitter (http://twitter.com/Wikiversity) and identi.ca (http://identi.ca/group/wikiversity).

You don't need to be an educator to edit. You only need to be bold to contribute and to experiment with the sandbox or your userpage. See you around Wikiversity! --Abd 19:37, 14 September 2011 (UTC)

title: User talk:Gpforty2


text:
User talk:U3053471

 Hello U3053471, and welcome to Wikiversity! If you need help, feel free to visit my talk page, or contact us and ask questions. After you leave a comment on a talk page, remember to sign and date; it helps everyone follow the threads of the discussion. The signature icon in the edit window makes it simple. All users are expected to abide by our Privacy policy, Civility policy, and the Terms of Use while at Wikiversity.

To get started, you may

 * Take a guided tour and learn to edit.
 * Visit a (kind of) random project.
 * Browse Wikiversity, or visit a portal corresponding to your educational level: pre-school, primary, secondary, tertiary, non-formal education.
 * Find out about research activities on Wikiversity.
 * Explore Wikiversity with the links to your left.

 * Read an introduction for teachers and find out how to write an educational resource for Wikiversity.
 * Give feedback about your initial observations
 * Discuss Wikiversity issues or ask questions at the colloquium.
 * Chat with other Wikiversitans on #wikiversity-en.
 * Follow Wikiversity on twitter (http://twitter.com/Wikiversity) and identi.ca (http://identi.ca/group/wikiversity).

You don't need to be an educator to edit. You only need to be bold to contribute and to experiment with the sandbox or your userpage. See you around Wikiversity! --Abd 19:46, 14 September 2011 (UTC)

title: User talk:U3053471


text:
User talk:Jim McGriff Jr.

 Hello Jim McGriff Jr., and welcome to Wikiversity! If you need help, feel free to visit my talk page, or contact us and ask questions. After you leave a comment on a talk page, remember to sign and date; it helps everyone follow the threads of the discussion. The signature icon in the edit window makes it simple. All users are expected to abide by our Privacy policy, Civility policy, and the Terms of Use while at Wikiversity.

To get started, you may

 * Take a guided tour and learn to edit.
 * Visit a (kind of) random project.
 * Browse Wikiversity, or visit a portal corresponding to your educational level: pre-school, primary, secondary, tertiary, non-formal education.
 * Find out about research activities on Wikiversity.
 * Explore Wikiversity with the links to your left.

 * Read an introduction for teachers and find out how to write an educational resource for Wikiversity.
 * Give feedback about your initial observations
 * Discuss Wikiversity issues or ask questions at the colloquium.
 * Chat with other Wikiversitans on #wikiversity-en.
 * Follow Wikiversity on twitter (http://twitter.com/Wikiversity) and identi.ca (http://identi.ca/group/wikiversity).

You don't need to be an educator to edit. You only need to be bold to contribute and to experiment with the sandbox or your userpage. See you around Wikiversity! --Abd 19:50, 14 September 2011 (UTC)

If you need help with your user page, please don't hesitate to ask my on User talk:Abd --Abd 19:50, 14 September 2011 (UTC)

title: User talk:Jim McGriff Jr.


text:
User talk:M.Finemore

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User talk:Seand23/Funding for NRL clubs under new pokie laws

Good job Sean, a compelling and hot issue you've chosen, with a well written outline. I can see the business and the politics in there easily, but you might have to do more to ensure the local to the international is included. You might want to see if other countries have faced down this issue, and what the outcomes have been.. or maybe the online gambling is a door into an international angle? Keep going Leighblackall 10:09, 15 September 2011 (UTC)

It is interesting to note how this debate has heated up this week. Postillion 23:39, 27 October 2011 (UTC)


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User:Egm6321.f11.team1.colsonfe/HW2

= R*2.5 Conversion to Particular N1-ODE =

Find
Explain the following equations:

 * {| style="width:100%" border="0" align="left"

$$
 * $$\bar M(x,y)+\bar N(x,y)(y')^3=0$$
 * $$\displaystyle (Equation\;2.5.1)
 * $$\displaystyle (Equation\;2.5.1)
 * }
 * }

 * $$M(x,y):=\left [\bar M(x,y)\right]^{1/3}$$

 * $$N(x,y):=\left [\bar N(x,y)\right]^{1/3}$$

Basic Equations
General N1-ODE form:

 * $$G\left(y',y,x\right)=0$$

Particular N1-ODE form:

 * {| style="width:100%" border="0"

$$M\left(x,y\right)+N(x,y)y'=0$$
 * $$\,(Equation\;2.5.2) $$
 * style= |
 * }

Solution
The relation among the three equations we are to explain is illustrated by the ability to convert the first from a GENERAL form N1-ODE to a PARTICULAR form N1-ODE. The following steps show how redefining M and N as given will convert one type of equation into another.

Use definition of M and N and take cube power of each side.

$$ \left[M(x,y)\right]^{1/3}=\bar M(x,y) $$

$$ \left[N(x,y)\right]^{1/3}=\bar N(x,y) $$

Enter this result into Equation 2.5.1.

$$\left[M(x,y)\right]^3+\left[N(x,y)\right]^3(y')^3=0$$

Subtract one term to the right side.

$$\left[M(x,y)\right]^3=-\left[N(x,y)\right]^3(y')^3$$

$$\left[M(x,y)\right]^3=\left[-\left[N(x,y)\right](y')\right]^3$$

Take the cube root and add to the left side.

$$M(x,y)=-\left[N(x,y)\right](y')$$

$$M\left(x,y\right)+N(x,y)(y')=0$$

This now matches Equation 2.5.2. We can see that we were able to convert an apparent general form N1-ODE to a particular form N1-ODE.

 Solution by Egm6321.f11.team1.colsonfe 02:31, 17 September 2011 (UTC)

= R*2.6 Linear Independence of Homogeneous Solutions =

Given
Two homogeneous solutions:

 * $$y^1_H(x)=x$$

 * $$y^2_H(x)=\frac{x}{2}\log\left(\frac{1+x}{1-x}\right)-1$$

Find
Show that $$y^1_H(x)$$ and $$y^2_H(x)$$ are linearly independent.

Plot $$y^1_H(x)$$ and $$y^2_H(x)$$.

Basic Equations
Linear Independence:

 * $$\forall\alpha\in\mathbb R, y^1_H(\cdot)\ne\alpha y^2_H(\cdot)$$

i.e, for any given $$\alpha$$, show that

 * $$\exists\hat x$$ such that $$y^1_H(\hat x) \ne\alpha y^2_H(\hat x)$$

Solution
By definition of linear independance, we merely need to show there is a value $$\hat x$$ where $$y^1_H(\hat x) \ne\alpha y^2_H(\hat x)$$ for some $$\alpha$$.

Let us then choose $$\hat x=0$$.Then

$$y^1_H(\hat x)=\hat x=0$$

$$y^2_H(\hat x)=\frac{\hat x}{2}\log\left(\frac{1+\hat x}{1-\hat x}\right)-1=-1$$

Now lets consider any given $$\alpha$$ for our chosen $$\hat x=0$$,

$$y^1_H(\hat x) \overset{?}{=}\alpha y^2_H(\hat x)$$

$$0 \overset{?}{=}-\alpha$$

It is clear that the above equality IS NOT true for all $$\alpha$$.

Therefore, for $$\hat x=0$$ and $$\alpha=1$$, $$y^1_H(\hat x) \ne\alpha y^2_H(\hat x)$$ for some $$\alpha$$, which means that $$y^1_H(x)$$ and $$y^2_H(x)$$ are linearly independent.

 * HW2_6plots.gif

 Solution by Egm6321.f11.team1.colsonfe 02:31, 17 September 2011 (UTC)

= R*2.8 First Exactness Condition =

Given

 * {| style="width:100%" border="0"

$$M\left(x,y\right)\cos y'+N(x,y)\log y'=0$$
 * $$\,(Equation\;2.8.1) $$
 * style= |
 * }

Find
Does Equation 2.8.1 satisfy the first exactness condition?

Basic Equations
First exactness condition for N1-ODE

 * $$M\left(x,y\right)+N(x,y)y'=0$$

Solutions
Let us define

$$\bar M\left(x,y\right):=M(x,y)$$

$$\bar N\left(x,y\right):=N(x,y)$$

Then Equation 2.8.1 becomes

$$\bar M\left(x,y\right)\cos y'+\bar N\left(x,y\right)\log y'=0$$

$$\bar M\left(x,y\right)+\bar N\left(x,y\right)\frac{\log y'}{\cos y'}=0$$

$$\bar M\left(x,y\right)+\bar N\left(x,y\right)F(y')=0$$

According to notes, if the function $$F$$ has no explicit inverse, then it CANNOT be put in the form which satisfies the First Exactness Condition.

The function $$F(y')=\frac{\log y'}{\cos y'}$$ has no inverse $$F^{-1}\left(y'\right)$$, and so therefore this N1-ODE fails to satisfy the First Exactness Condition.

 Solution by Egm6321.f11.team1.colsonfe 04:30, 17 September 2011 (UTC)

= References=

title: User:Egm6321.f11.team1.colsonfe/HW2


text:
User:Egm6321.f11.team3/Hwk2

Given
The Legendre equation is given as

where n is the order of the equation. When n=1,

Two homogeneous solutions are given as:

Find
Verify that:

Solution
We solved this problem on our own.

Substitute equation 2.1.3 into 2.1.2 as the independant variable since the order of polynomial is 1.

Therfore, the terms cancel and $$\displaystyle L_2(y^1_H)=0.$$

Now to prove the second equation, substitute equation 2.1.4 into 2.1.2 as the independant variable since the order of polynomial is 1.

Therefore,

By rearranging terms we get following and it is clear the equation does equal zero.

Robert Anderson 23:38, 18 September 2011 (UTC)

Find
Verify that:

is the solution for:

Solution
We solved this problem on our own.

Thus (2.2.1) is indeed the solution for (2.2.2).

Find
Show that:

is linear in $$\displaystyle y'$$, and that (2.3.1) is in general an N1-ODE.

But (2.3.1) is not the most general N1-ODE

Give an example of a more general N1-ODE.

Solution
We solved this problem on our own.

If f(.) is a linear function, f(.) satisfies with

Let

Thus,$$\displaystyle y^{'} $$ is linear. To show that (2.3.1) is in general an N1-ODE,Let

Thus (2.3.1) is in general an N1-ODE

is a more general N1-ODE.

Given
Mtg8.8-1

Find
Verify equation (2.4.1) is a N1-ODE

Solution
Because the highest differential coefficient in this equation is y',so it is first-ODE. Then this equation includes some components,such as siny and y^3,are nonlinear,it is a nonliner equation. We also can proof it by using the linearity equation below:

You can easliy find that:

So it is nonlinear.

Find
Explain how

can be converted into the form

using

Solution
We solved this problem on our own

Taking cube root on both sides

We know that,

Thus the given equation is converted into the form,

Prashant Gopichandran 19:02, 21 September 2011 (UTC)

Given
The homogeneous solutions $$\displaystyle y_{H}^{1}=x,\, \, y_{H}^{2}=\frac{x}{2}log(\frac{1+x}{1-x})-1$$ are linearly independent. Mtg9,9-1

Find
Show that $$\displaystyle \forall \alpha\in \mathbb{R},\, y_{H}^{1}(\cdot )\neq \alpha y_{H}^{2}(\cdot )$$

Solution
The method how to find linear indenpendence: In order to find:
 * {| style="width:100%" border="0"

$$\forall \alpha\in \mathbb{R},\, y_{H}^{1}(\cdot )\neq \alpha y_{H}^{2}(\cdot )$$ We can proof in this way:
 * style="width:95%" |
 * style="width:95%" |
 * }
 * {| style="width:100%" border="0"

$$show\, \, that\, \exists \hat{x}\, such\, \, that\, \, y_{H}^{1}(\hat{x})\neq \alpha y_{H}^{2}(\hat{x})$$ So,in our question,suppose that there exists such $$\alpha _{1}$$ for $$\hat{x}_{1}$$
 * style="width:95%" |
 * style="width:95%" |
 * }
 * {| style="width:100%" border="0"

$$y_{H}^{1}(\hat{x}_{1})=\alpha _{1}y_{H}^{2}(\hat{x}_{1})$$ and there exists such $$\alpha _{2}$$ for $$\hat{x}_{2}$$
 * style="width:95%" |
 * style="width:95%" |
 * }
 * {| style="width:100%" border="0"

$$y_{H}^{1}(\hat{x}_{2})=\alpha _{2}y_{H}^{2}(\hat{x}_{2})$$ If $$\alpha _{2}\neq \alpha _{1}$$,They are linearly-independent. Let $$\hat{x}_{1}=1$$
 * style="width:95%" |
 * style="width:95%" |
 * }
 * {| style="width:100%" border="0"

$$0.5=\alpha _{1}\frac{0.5}{2}log(\frac{1+0.5}{1-0,5})-1\Rightarrow \alpha _{1}=-0.57$$ Then,let:
 * style="width:95%" |
 * style="width:95%" |
 * }
 * {| style="width:100%" border="0"

$$0.2=\alpha _{1}\frac{0.2}{2}log(\frac{1+0.2}{1-0,2})-1\Rightarrow \alpha _{1}=-0.2$$
 * style="width:95%" |
 * style="width:95%" |

So $$\alpha _{1}\neq \alpha ^{2}$$

 * }

Given
Considering the following equation,

Find
and show that 2.7.2 is a non-linear first order ordinary differential equation.

Solution
We solved this problem on our own.

The general form of a N1-ODE is given in lecture 7-6 as: and the particuluar form is: Now determine the partial differential terms using the differentiation rules

The general form equation will therefore be And is therefore a N1-ODE.

Robert Anderson 02:51, 21 September 2011 (UTC)

Given
The necessary criteria for a 1st order ordinary differential equation to satisfy the first exactness condition is that it has the particular form:

Find
Does equation (2.8.2) satisfy the first exactness condition?

Solution
We solved this problem on our own.

Rearranging equation (2.8.2) results in:

Because $$\displaystyle f(\cdot) $$  has no explicit inverse, we cannot find particular form for (2.8.2). Thus, (2.8.2) cannot meet the first exact condition.

Find
Review Calculus, and fine the minimum degree of differentiability of the function $$\displaystyle \phi(x,y) $$ such that (2.9.1) is satisfied. State the full theorem and provide a proof.

Solution
We solved this problem on our own.

Clairaut's Theorem: Given $$\displaystyle f:D^{n}\rightarrow R $$, suppose that for all $$\displaystyle 1\leq i,j\leq n $$, the mixed partial derivative

$$\displaystyle f_{x_{i},x_{j}}(x) $$ exists in a neighborhood of a, If $$\displaystyle f_{x_{i},x_{j}}(x) $$ is continuous at a for all$$\displaystyle 1\leq i,j\leq n $$,

then $$\displaystyle f_{x_{i},x_{j}}(a) $$ = $$\displaystyle f_{x_{j},x_{i}}(a) $$

Thus, according to Clairaut's Theorem, if $$\displaystyle f_{x_{i},x_{j}}(a) $$ is continuous at a for all $$\displaystyle 1\leq i,j\leq n $$, then minimum degree of differentiability is three.

Proof:

First, we have to know Mean Value Theorem.

If $$\displaystyle g(x):[a,b]\rightarrow R $$ is continuous on $$\displaystyle [a,b] $$ and differentiable on $$\displaystyle (a,b) $$, then there exists some $$\displaystyle a<c<b $$, such that

Let $$\displaystyle N $$ be a neighborhood of the point a with the property that $$\displaystyle f_{x_{i},x_{j}} $$

exists for all $$\displaystyle  x\in N $$ and all  $$\displaystyle  i,j\in \left \{ 1,2,...,n \right \} $$

Define a new function $$\displaystyle g:N\rightarrow R $$ by

Consider

0< Note that $$\displaystyle g(a+te_{i}) $$ is differentiable for $$\displaystyle 0<t<h $$. We can therefore apply the Mean Value Theorem to $$\displaystyle g(a+te_{i}) $$

On the other hand,

Thus,

We get

Now we look at

The Mean Value Theorem implies that there exists some $$\displaystyle c_{j}\in(0,h) $$ such that

Thus, we can get

Now,we look at the limit

Since $$\displaystyle 0<c_{i}<h,0<c_{j}<h,\lim_{h\rightarrow 0}(a+c_{i}e_{i}+c_{j}e_{j})=a $$

By hypothesis, the mixed partial derivative is continuous at a. This implies

On the other hand, the entire computation can be rewritten with the roles of i and j exchanged. Thus we can get

Thus, we complete the proof.

Given
The equation: Mtg10,10-5

Find
Verify that (2.10.1) is indeed the solution for N1-ODE (2.10.2)

Solution
We solved this problem on our own

We can take the derivative of $$\phi (x,y)$$:
 * {| style="width:100%" border="0"

$$\displaystyle \frac{\mathrm{d} \phi (x,y)}{\mathrm{d} x}=75x^{4}+cosy\cdot {y}'$$
 * style="width:95%" |
 * style="width:95%" |
 * }

Find
Explain why solving for the integrating operator h(x,y) is not easy.

Solution
The given equation is a non-linear partial differential equation with terms like hx,hy,Nx,My.

So solving for the integrating factor h(x,y) is not easy.

Prashant Gopichandran 19:08, 21 September 2011 (UTC)

Given
Suppose $$\displaystyle h_{x}(x,y)=0,$$thus h is a function of y only.then $$\displaystyle \frac{hy}{h}=\frac{1}{M}(N_{x}-M_{y})=:m(y)$$

Find
Find h(y)

Solution
$$\displaystyle \int ^{y}\frac{hy}{h}=\int^{y} \frac{1}{M}(N_{x}-M_{y})$$

$$\displaystyle \Rightarrow logh(y)=\int ^{y}m(s)ds+k$$

$$\displaystyle \Rightarrow h(y)=exp[\int ^{y}m(s)+k]$$

Find
Show that

Solution
We solved this problem on our own.

First we put the equation in the form of (1)p11-2

$$\displaystyle h_xN+h(N_x -M_y)=0$$

$$\displaystyle \frac{h_x}{h}=-\frac{1}{N}(N_x-M_y)=$$

$$\displaystyle dy+(\frac{y}{x}-x^2)=0$$

With using the first term for N and the second for M, we have

$$\displaystyle h(x)=exp[-\int\frac{1}{N}(N_x-M_y)]=exp[\int\frac{1}{1}(\frac{1}{x}-0)dx+k]$$

$$\displaystyle h(x)=exp[ln(x)+k]$$

For k=0, h(x)=x

Now we find y(x),

$$\displaystyle y'+\frac{y}{x}=x^2$$

$$\displaystyle h(y'+\frac{y}{x})=hx^2$$

$$\displaystyle hy'+h'y=hx^2$$

$$\displaystyle (xy)'=x^3$$

$$\displaystyle y(x)=\frac{1}{h(x)}[\int h(s)b(s)ds+k_2]$$

After integration we have, $$\displaystyle xy=\frac{x^4}{4}+k$$

$$\displaystyle y=\frac{x^3}{4}+\frac{k}{x}$$

Robert Anderson 04:40, 21 September 2011 (UTC)

Find
1. Find $$\displaystyle y(x) $$ in terms of

2. Find $$\displaystyle y(x) $$ in terms of

3. Find $$\displaystyle y(x) $$ in terms of

Solution
We solved this problem on our own.

1.

2.

3.

Find
Show that the integration constant $$\displaystyle k1 $$ in (2.15.1) is not necessary. i.e., only $$\displaystyle k2 $$ in (2.15.2) is necessary

Solution
We solved this problem on our own.

According to above manipulation, we can see that $$\displaystyle k $$ is cancelled, but $$\displaystyle \frac{k2}{k} $$ remains. Thus, $$\displaystyle k1 $$ is not necessary in the equation (2.15.1) but $$\displaystyle k2 $$ is necessary in the equation (2.15.2)

Given
The form of L1-ODE in class: The form of L1-ODE in King's book The solution in class: The solution in King's book: Mtg12,12-2

Find
Show that the solution of (2.16.3) in (2.16.1) agrees with the result present in King's book (2.16.4).

Solution
We solved this problem on our own

Let:
 * {| style="width:100%" border="0"

$$\displaystyle y_{H}(x)=\frac{1}{exp\int ^{x}a_{0}(s)ds},\, \, A=k,\, \, y_{P}(x)=\frac{\int ^{x}(exp\int ^{x}a_{0}(s)\cdot ds)\cdot b(s)ds}{exp\int ^{x}a_{0}(s)ds}$$ it is the same as King's equation below:
 * style="width:95%" |
 * style="width:95%" |
 * }
 * {| style="width:100%" border="0"

$$\displaystyle y=\underbrace{Aexp(-\int ^{x}P(t)dt)}_{Ay_{H}(x)}+\underbrace{exp(-\int ^{x}P(t)dt)\cdot \int ^{x}Q(s)exp(\int ^{x}P(t)dt)\cdot ds}_{y_{P}(x)}$$
 * style="width:95%" |
 * style="width:95%" |
 * }

Given

Find
Instead of identifying yH(x) from the given equations solve the homogeneous part of

Solution
We solved this problem on our own

$$\displaystyle y(x)=\frac{1}{h(x)}[\int ^{x}h(s)b(s)ds+k].$$

Since the equation,

is homogeneous,b(s)=0.

$$\displaystyle \Rightarrow y_{H}=\frac{k}{h(x)}$$

=Problem R*2.18 Integrating Factor [h]=

Given

 * {| style="width:100%" border="0"

$$\displaystyle \left [x^4 y + 10 \right ] + (\frac{1}{2} x^2)y'=0 $$  (2.18.1)
 * style="width:95%" |
 * style="width:95%" |
 * }

which is not an exact L1-ODE-VC.

Find
Determine whether Eq (2.18.1) is exact or not. If it is not, make it exact by using integrating factor h (x, y)

Solution
1. First exactness condition,

$$\displaystyle M(x,y) + N(x,y)y' = 0$$

with

 * {| style="width:100%" border="0"

$$\displaystyle M(x,y) = x^4 y + 10$$

(2.18.2)
 *
 * }

and

 * {| style="width:100%" border="0"

$$\displaystyle N(x) = \frac{1}{2} x^2$$

(2.18.3) so it satisfies the first condition.
 *
 * }

2. Second exactness condition

 * {| style="width:100%" border="0"

$$\displaystyle M_{y} = x^4$$ (2.18.4)
 *
 * }
 * {| style="width:100%" border="0"

(2.18.5) so
 * $$\displaystyle N_{x} = x$$
 *
 *
 * }

$$\displaystyle M_{y}(x,y) \ne N_{x}(x,y) $$

Therefore, Eq (2.18.1) is not exact.

3. Finding an integrating factor h(x,y) such that the following exact N1-ODE:

$$\displaystyle h(x,y) \left[M(x,y)+N(x,y) \, y' \right]=0$$

Assume $$\displaystyle h_{y}(x,y) = 0 $$, so $$\displaystyle h$$ becomes a function of x only,

then

 * {| style="width:100%" border="0"

(2.18.6)
 * $$\displaystyle \frac{h_{x}}{h}= -\frac{1}{N}(N_{x}-M_{y})=: n(x)$$
 *
 *
 * }

Substituting $$\displaystyle N$$ Eq (2.18.3), $$\displaystyle N_{x}$$  Eq (2.18.5),  and  $$\displaystyle M_{y}$$  Eq (2.18.4)  into  Eq (2.18.6)

 * {| style="width:100%" border="0"

(2.18.7)
 * $$\displaystyle n(x)= -\frac {1}{\frac{1}{2} x^2}(x-x^4)$$
 *
 *
 * }
 * {| style="width:100%" border="0"

(2.18.8) Changing the variable of function,
 * $$\displaystyle n(x)= 2(x^2 - \frac{1}{x}) $$
 *
 *
 * }
 * {| style="width:100%" border="0"

(2.18.9)
 * $$\displaystyle n(s)= 2(s^2 - \frac{1}{s}) $$
 *
 *
 * }

Definition from $$\displaystyle h(x)$$

 * {| style="width:100%" border="0"

(2.18.10) Substituting $$\displaystyle n(s) $$ into Eq (2.18.10)
 * $$\displaystyle h(x) = exp \left[\int^x n(s)ds + k \right]$$
 *
 *
 * }
 * {| style="width:100%" border="0"

(2.18.11)
 * $$\displaystyle h(x) = exp \left[2 \int^x (s^2 - \frac{1}{s})ds + k \right]$$
 *

 *

 * }
 * {| style="width:100%" border="0"

(2.18.12)
 * $$\displaystyle h(x) = exp \left[\frac{2}{3} x^3 - 2\ln x + k \right]$$
 *

 *

 * }
 * {| style="width:100%" border="0"

(2.18.13)
 * $$\displaystyle h(x) = \frac{1}{x^2}exp \left[\frac{2}{3} x^3 + k \right]$$
 *

 *

 * }

title: User:Egm6321.f11.team3/Hwk2


text:
User talk:Benjaminwilson

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title: User talk:Benjaminwilson


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User talk:NHHowell

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User talk:Egm6321.f11.team1

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title: User talk:Egm6321.f11.team1


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User talk:U3025472

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title: User talk:U3025472


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User talk:Granado23

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title: User talk:Granado23


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User talk:Antperry

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title: User talk:Antperry


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User talk:Jrobbo89

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User talk:Rmckay

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User talk:Timeverdell

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title: User talk:Timeverdell


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User talk:Toddjdavey

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User talk:Ultima.ramza

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User talk:U3025354

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User talk:GHorto91

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User talk:U3036419

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User talk:SamN90

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text:
User:Jhasslinger

Links to Class pages:
 * Class Book
 * Enes 100
 * G.E. Projects
 * G.E. Project Forms
 * Teachers Grp page (Learning)|

Links to Wiki Main pages:
 * Wiki-Books
 * Wiki-Media
 * Wiki-Pedia
 * Wiki-Versity
 * Pics/Vids Upload
 * Text upload

Notes About Wiki programming:
 * When Links are linked as external links there is no need do an external links in the page that is the original link. Everything that is linked in direct page can be internal links since first link is pulling me into the main service.

Action reaction.... thinking ahead on how to line up multiple balloons from other columns in my column method

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Saved Code

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title: User:Jhasslinger


text:
User talk:Criveros0248/enes100/poppit

Carlos, great idea for chunking poppit. I improved my score by looking at the distance between ballons with neighbors. Forcusing on the longest distance first. 1sfoerster 21:43, 14 September 2011 (UTC) 10/10/30 ... great ... why did this not make the team summary? team score would have been bigger! 1sfoerster 19:53, 19 September 2011 (UTC)

title: User talk:Criveros0248/enes100/poppit


text:
User:Anton1102/enes100/strandbeest

Link to project strandbeest team page.

Week0 Activities
Watch the projects that were done by the other teams before us. I will be looking through the pics I took from the class and YouTube videos. Work/brainstorm the designs and materials for this project

Write problem statement
Need to find the way to earn the resources/materials for this projects. Also need to design with drawings and Notebooks. Come up with an agreement with the team with specific details within the designs that we will come up with (Size, materials, design, and etc.)

Create an our own strandbeest that can walk by its own.(Attach motors)

Assign Task1

 * Derive the ideas from the other projects/ideas
 * Brainstorm how to make our own differed designs
 * Be ready to discuss topic (materials and designs) with the group

Week1 Activities
Got with the group and discussed with the three models that were done before ours. We came up with what kind of materials we are going to use.
 * Pushed to understand how the legs work.
 * Decided as a group to gather the materials for this week's activity/goal

Compare actual work done to Task1

 * Made the team to decide that we use "PLASTICS materials" as our main structure of our design. (Light, durable, and cheap materials)
 * Brought out the ideas of using toy motors/engines to allow our strandbeest to move itself when activated. The toy engines can be those that are from walking toys. ( wind by hand or pull the string to activate the engines).
 * The team decided to use legos as our materials and lego engines are easily attachable to lego strandbeest and they are battery powered thus easy for the team to activate the stranbeest when the whole design is constructed. (The one of the engines I have found to buy for the project is below at "WEEK 1 Narrative".)

Week1 Narrative
The websites for the ideas and materials that will be considered to be applied/used. The 2nd design that is also on the notebook. This design is going to be used
 * LegoEngine(Need to have battery and remote control/switch)
 * StransbeestLegs (The model/design+illustration are done by Theo Jansen. This will be probably applied to our models)
 * I was convinced by Theo Jansen's design. It seemed to be most effective design and thus I pushed this idea to the strandbeest project since we are going to use legos. (Theo Jansen's simulation)
 * The idea of using lego seemed the most idealistic because its light and cheap to get. Also it is fairly easy to replicate many parts such as strandbeest's legs than the woods or metals(copper)
 * Lego Strandbeest demonstration by others on Youtube

Week1 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and 1sfoerster 13:32, 28 August 2011 (UTC) to create a time and date stamp. Create a new category if another team mate has already commented here.
 * Anton did help very much with his strandbeest leg designs which did give us a positive idea to start our designs from. This design did help make using lego parts the preffered material choice.
 * He was also very helpful and offered to seek out some lacking lego parts.qchi
 * Antonio helped a lot with the basics of the strandbeest and the basic design and fundamentals of the strandbeest. RyanPak 21:35, 26 September 2011 (UTC)

Assign Task2

 * Find as many lego pieces that I personally have that can be used to build our strandbeest.
 * Review the design and get ready to construct "parts" of (not "whole") strandbeest.
 * Test out or analyze the parts that are going to be created and see if they can function correctly even when attached into whole strandbeest structure.

Compare actual work done to Task2

 * Instructed the team members to construct their own models and we are going to vote on the best model (Divide and Conquer)
 * My model was chosen to be used as the model for the strandbeest
 * Added more features to make the model more smoother and durable
 * Pushed to replicate my chosen model for strandbeest. And successfully replicated 2 more and we now have total of 3 pairs of legs.

Week2 Narrative

 * Came up with the design we are going to use for the strandbeest on 9/26/11.
 * Put more pieces on the legs in order to make the legs more stronger and agile. Also with the team mates, we replicated more of this model in order to advance to the final step of the Strandbeest.

Assign Task3

 * Get ready to buy/use the lego motor for final step of the strandbeest
 * Double check the model to see any possible error or difficulty adding more features such as motors.
 * Decide whether to buy/use Medium motor or XL LegoEngine motor for the lego
 * Use Autodesk 123D to represent the strandbeest in 3D model

Compare actual work done to Task3

 * Our group is working on the pieces that will need to put on the strandbeest and the motor so that they both can be attached together.
 * I have suggested to the team to present our group's project this week with my wikiversity page with links as tools to help present our project.
 * The motor is now has been ordered and about to be ready for use and the lego set has also will come in for replicating the strandbeest to desired amount.

Week3 Narrative

 * We started to build the pieces that will join the strandbeest with the motor
 * I suggested the idea of using the similar method that the Bionicle used for their very first designs/figures- The rotating arms rotate opposite directions which the strandbeest legs have to also in order to keep the timing of the movement perfect
 * And we glued the bridges of the strandbeest so that they will stay fixed and keep the strandbeest balanced while in motion.

Assign Task4

 * Get into the class before Wednesday to make sure we can finish the whole project by Wednesday.
 * Attach the motor to the strandbeest successfully and test it out to insure no major problems are present.
 * Bring in any necessary lego parts I have so that the replication of the strandbeest and the building of the motor can be smoothly finished.
 * If this project cannot be finished, decide whether to continue this project or start a new project with the different team members.

Compare actual work done to Task4

 * Planned and designed the piece that will put the strandbeest and the motor together
 * Pushed to finish the project while the members were giving up
 * Built the piece that was designed and put into the strandbeest and tested for its function
 * Finalized the strandbeest except the motor (Did not order early enough)

Week4 Narrative

 * Even though the motor did not get in time, our group was successful at building fully functioning strandbeest.
 * Pushed to finalize the project for the last time with the group
 * Built the designed piece with ease due to the notes I took on the notebook.
 * The piece was tested multiple times and finalized and put into the strandbeest
 * Did not build the separate part for the motor to be part of the strandbeest structure.

title: User:Anton1102/enes100/strandbeest


text:
Engineering Projects/Rube Goldberg/Howard Community College

Howard Community College is starting this project in the fall of 2011. The goal is to give those that program and/or game a very specific programming project.

 * /Fall2012/
 * /Fall2011/
 * /Spring2012/


text:
Engineering Projects/Rube Goldberg/Howard Community College/Fall2011

/550_FKJ/


text:
Engineering Projects/Rube Goldberg/Howard Community College/Fall2011/550 FKJ

Problem Statement
Is it possible to make a Rube Goldburg machine out of printer and scanner parts?

Team Members
These are the team members of FKJ
 * K.saunders
 * JaeHaynes
 * Felhariri

Summary+Story
Summary and story: During the past 4 weeks, our group went through disassembling a laser printer and figuring out how a simple Rube Goldberg machine can be created. Many designs and drawings were created by the different team members and in the end all were put together and a final design was created in our notebooks. Although a physical model was not created, the members learned many things about how the different parts of a printer work to really make this extremely sophisticated machine to work (which is what rube Goldberg is all about). Parts that were found and that can be potentially used are the several gears of different sizes, the roller bars, the fans and the laser. From the beginning, all of the team members agreed that the project should be physically attached to a wooden platform which is aligned vertically. Then some kind of ball would be the center of attention, as it would roll down and trigger all the machines assembled on the platform. For instance, the ball would roll over a switch to trigger the fan which would in return blow a sail boat. It’s like the domino affect however with parts of a printer. The details of what materials would be used for each part were also decided. For instance, the base of the sail boat would be made out of light material such as foam since the fan that was used was not powerful enough to blow relatively heavier material. Secondly, it was decided that the ball would roll on cylindrical tubes. And finally, the water tub that would float the boat would be made out of fiber glass. Finally, an arduino may be used to not only power the fan but also to control it. This conclusion was discovered after the fan was attached a power source which in turn showed that it was not using the maximum power output. An arduino may be used to fix that.

Material List

 * DC fan
 * Arduino
 * Gears (different sizes)
 * Fiber glass
 * Roller bars
 * String
 * Cylindrical tubes
 * Mini ball(s)
 * Switches
 * Wires
 * Some kind of platform to place your project on
 * Display screen
 * Other parts of a laser printer that fit into the project

Decision List
JaeHaynes originally took home a laser jet printer to dissessemble. K.Saunders brought in a large piece of furniture board. We decided to focus more on the gears and get a machine started from there. We decided to visually create a layout of our project before assembly

Software List
During the construction of our Rube Goldberg machine, we decided to work visually and not use any form of computer software.

Time
Along with the four weeks of student in-class work, we estimate it will take at most 2 weeks to complete and an additional week in order to test and modify. We estimate 2 weeks because in the week we spent brainstorming and constructing it, we completed about a third of the model. With an additional two weeks, the other 5 or 6 parts could be completed and put together. The last weeek would be dedicated to testing and modifying the model so that it runs effectivly every time.

Tutorials
The next team can easily replicate what has already been done by viewing the pictures of the model that we have posted. Here are some rube goldberg machines found on youtube:
 * http://www.youtube.com/watch?v=RouXygRcRC4

Repeatability
This project is very repeatable. The parts we have assembled will continue to perform their fuctions; operating correctly every time. The large piece of wood donated by K.saunders may be dismantled and used by another group.

Next Steps
Assemble the rest of the parts completing the creation of our Rube Goldberg machine.


text:
Engineering Projects/StrandBeest/Howard Community College

These are the semesters that Howard Community College has worked on strandbeest projects:
 * /fall2012/
 * /spring2012/
 * /fall2011/


text:
Engineering Projects/StrandBeest/Howard Community College/team members

 * G