Hello my dear cutie!

Cooling System Project

Repairing Iphone 4S Power Button yourself - DIY修理4S電源按鍵

I am writing down what I have prepared for this project.
簡單的紀錄一下修理的要點。

Issue: the power button could not be pressed anymore

狀況：4S電源按鍵失效（不能按）

Reason: the switch inside fatigueed.
原因：內部按鈕開關（關鍵）疲勞失效

Electric Field Flames Reveal in Schlieren Imaging Technique 流場還原成像技

你有觀察過燭火周圍的海市蜃樓嗎？我們要如何還原火焰流場的真相呢？Schlieren 成像技術已經有數個世紀的歷史了，這個方式可以很神奇的讓科學家真正的把原本肉眼看不到的流場變成看得到。下面這張schlieren圖，上面有個螺絲放在板子上，這是要告訴我們這張圖片成像的聚焦處是幾經微調到成像最清晰的地方，連螺牙都清晰可見。

Have you ever observed that the gases around a candle looks different? How does a regular flame jet reveals its truth of flow field? Schlieren  technique has been know for centuries for  scientists understand the invisible flow field. This technique is able to amazingly image flow field become visualize. The following is a schlieren image with a screw on top of the plate which tells you the image is accurate focused at the desired testing zone.

  

Behind the onion - Scientific X-ray Vision 科學超人眼

  On the left-hand side, it is a picture as everyone is able to take on the side-view of a flame. This image is as the same as what we normally taking in our daily life - we are imaging living three dimensional objects onto a screen. The screen gathers all the information of all the objects projected as a two dimensional picture. Is it possible to see what's in the middle between objects on the picture? How can we get to see only one slice located at the center plane of the flame? Superman gets his talent X-ray eye to see this world but we don't.

  

  左手邊這張照片，是一張你我都會拍攝的火焰側面玉照。他的拍攝方式如同我們一般相機拍照稀鬆平常，垂手可得 —— 把想要拍攝的三維空間成像投影在相機裡的屏幕上。這張屏幕把這個角度的所有投射物體變成一張二維空間的照片。我們有可能可以看到照片物體和物體香疊的中間有什麼嗎？有什麼辦法我們可以只看到照片中間一個平面（剖面）的火焰的樣子？超人有他天生的透視眼可以穿透物體看到一切，但是我們沒有這個技能。

  The right-hand side picture is a mathematically resolved image located right in the middle of the flame. I am  expressing my admire to those scientists open up all of mysteries of physical phenomenon by mathematics. They are hard thinkers. They are one kind of philosopher trying to make the life having more sense.

右手邊這張照片是一個數學方法解出來的圖片，他就是火焰正中間一個由上到下一個平面的照片。科學家們不遺餘力的努力挖掘不同的方法來找尋這個世界的奧秘。我非常的佩服他們。他們是思想家，也是一種哲學家，他們努力的讓這個世界更有意義。

The moment — PLIF

The moment of almost there.

CNC intro, 3D printer,laser cutter, wax printer... etc.

W6C3 - Modern technique intro.

The final class today is meant to wrapped up and introducing of all the modern techniques. Such as how CNC milling function and communicate, injection molding, 3D printing, etc.. We appreciate Ben at Rapidtech giving a quick introduction of all the machines.

Fresh-cooked little cuties from printing machine. They need to shower a bit.

The class come to an end at this moment. Hope the world is at least slightly different and becoming amazing in their eyes.

New teflon burner base insulator

According to the need of adding the degree of freedom on coordinate of the experiment burner, a new burner base is needed under the constrain of limited height with respect to where the laser beam is situated.

A simple practice of CAD design and drawing. 

After a series of constrains as well as the estimation of the effective insulation thickness, a 3/8" teflon square bar is chosen 7000th thicker than expected.

The block requires milling to facing down to 3/8 within 1000th to 2000th tolerance. Taping with 1/4-20 blind hole.

   

Finishing week! — Women Fabrication Training

W6C1 - finishing part B(cap) on lathe, starting moving on the mill
W6C2 - working on the mill, drill and taping the set screw, end mill, stamp grooving, grinding sharpen tip, sand blasting

We make a rod into a scriber!

Kita and Megan is excited to see the tool they made.

Left — Female graduate students working on lathe machine
RIght — Grinding steel (Sam)

Stamp grooving (Sam)                               Tapping set srew and face milling

 

Image processing

TASK: retrieve all the datas from a image.

PROGRAM: MATLAB

Original image file 

Retrieved data

Appreciate those tomography reconstruction I have done three years ago.

Making a scriber in machine shop — Fabrication Training

W4C1 W4C2 - introduction of mill and lathe and practicing on lathe
W5C1-3 working on lathe for scriber


Thanks for the assistance from the shop technician, Ted Ediss(in the first picture below), on giving guidance.

Women graduate student in MAE practicing at machine shop on lathe.

When things are not function — check and change

There should always a reason that leads to the item not working.  So do not panic about getting a new item, instead you can actually check and change for most of the time. 

This is one small example of the old style car cigarette charger greedily splitting into three and malfunction. 

Copper connection, Driling introduction — Women Fabrication Training

W2C3 Women Fabrication Training

Soldering is the main topic today especially focusing on how to connect copper pipes together.

The hands on skill includes how to cut the pipes, clean up the pipes and different methods on how to connect the pipes.  The technician, Dave Hartwig, introduced the procedures to the students that silver soldering takes place at the lower temperature range than brazing.

Students start working on copper pipe cutting, and they know it well from the last class. 

Also, they know how to cleaning up the pipes, deburring.

Tube, Tube connecting — Women Fabrication Training

W2C2 Women Fabrication Training

The technician Dave Hartwig is showing how to use the flaring tool. Students are concentrate on practicing the skills and using the tools. Later, they get chance to work on adapters fittings and rings.

Kita gets excited and trying the bending tool.

 

Electrical Soldering, wires, heat shrink — Women Fabrication Training

W2C1 Women Fabrication Training

 

Hand Tools - W1C2 Women Fabrication Training

    The summer laboratory hands on skill training course is supported by DECADE program on campus.  It is a pleasure to not only share my own experiences but also coordinate the training with different professionals on campus as the main instructor.  The goal of the training is to create the environment which is the best for the women graduate students to embrace the fabrication skills applying in their research.

Survey. Training introduction — Women Fabrication Training

W1C1 Women Fabrication Training

The first day of every class is always important, although it seems not having too much direct teaching/learning action is going on.  It initializes the whole series of work and puts all the people together.  The main tasks on this day is taking the fabrication experience survey which offers an index for the mentor team (instructor, machinist and technician), and going over through the six-week syllabus. 

LFA interior design change project

Before:

Combustion Art Competition

My flame!

Methane

Re-collomated the lights.