Showing posts with label city of glasgow college. Show all posts
Showing posts with label city of glasgow college. Show all posts

Saturday, 20 October 2012

Thought Experiment: USA NUKED JAPAN


It is soo hard for our ignorant fellows to comprehend.
[Side note on ignorance: ignorance is lack of knowledge or not knowing. knowledge is opinion that which is your own or that with which you concur. that which cannot be opinion cannot be knowledge. Information i.e. USA nuked Japan in 1945 can be opinion but requires telling, so it can be information, something of which some can be informed of] taken from Marc Rose.

So i am making this post, so that it will help them dudes understand, and help make their point clearer to explain how am i lying. It is awkward singing into a debating group where tons of fellows accuse you of telling lies and suck at explaining their case. i am making this post out of my time, so not spamming, copy pasting stuff and trolling is appreciated. Just as a reminder, a few folks may find the topic of this post "THOUGHT EXPERIMENT: USA NUKED JAPAN" misleading, however it goes beyond as you will notice later and i have left the conclusion for the debating folks.

I have tried to assess the USA act of deciding to "nuke Japan to save its own population" over a thought experiment.

Case:
Trolley coming with high speed 
Consider you are working in a mine and there is a trolley coming from track A, there are 10 workers working on track A further on.
You are standing on the platform, where there is a control box. If you pull the lever the train will divert to track B. between the 10 workers and the train, at the movement there is a junction from which stems the track B, where 5 peoples are working.
The control box is within your reach, so you can make a decision. what would that be?

Following are different configuration of the events that can happen due to the decision made.
i) do nothing: 10 people will die.
ii) pull the lever: 5 people will die.

For i) people can argue that "no doing" is not an action, so cannot be held responsible for it. As no action has been done. While one can also say that the importance is to the decision. The decision i.e. letting a difference of 5 people die.
For ii) people can argue that by pulling the lever they have saved 5 lives, which otherwise be destroyed.

The argument in ii) give rise to the philosophy of “consequential moral principle” which dictates that the nature of action is defined by the consequence of the action i.e. if the consequence is good; the action is moral or good. If the consequence is bad; the action is bad or immoral.
Which further give rise to the knowledge of consequence being good or bad? For example in the given case  
for i) what if those 10 people who get killed because no action has been done were a great invertors, remarkable scientist or honest statesmen ?
for ii) what if those 10 people who are saved were serial killer, drug trafficker or terrorists?

Conclusion:
I am leaving the conclusion bit for the fellow readers as I promised earlier.  The decision is yours, what was the right thing for Americans to do on 6th and 9th August 1945?
Was the decision to nuke Japan so that America becomes a threat and destruction of many sovereign nations moral/right?
OR
Would the decision to let Japan destroy America be a moral/right decision?

Wednesday, 25 April 2012

DT_Tensiometer Test


Introduction
Tensiometer test is categorized in the Destructive testing, in industry it is used to estimate changes in the different properties of material before it breaks for quality purpose which is achieved by applying stress on specimen with the help of tensiomenter.

Objective
Using the tensiomenter estimate the following properties of the given material on graph:
  • Elasticity
  • Plasticity
  • yield stress
  • fracture point
Apparatus
  • Tensiometer
  • Table
  • Graph paper 
  • Test materials (i.e. Brass and Carbon steel).
Safety Procedures
Tensiometer is an isolated instrument so we do not have to take much safety precautions however using gloves and eye protection may be essential as the material that we may use drop some particle around. Further the specimen will fly off when it breaks, so the people around must be paying attention.

Test Procedure
Setup the tensiomenter on the table; place a graph paper at the drum of the tensiometer, before fastening the specimen in position we need to reset the gauge to zero (this will be on no load condition), after placing the specimen in position as we put the material in stress condition by turning the cam, as the more stress is applied it began to elongate gradually and finally fails.
While the tensile force is applied we keep marking the reference points which will help determining us the different properties of the material on graph.
Before the material reaches its fracture point and fails it goes through two stages
i)                    Elastic range
ii)                  Plastic range
Elastic range is the position wherein the material may show some abnormal behaviour but it can retrieve to its original stage.
Plastic range is the position in which material show the abnormal behaviour but its too late for it to be able to retrieve to its original position.
We repeated the same procedure for two different specimen materials, i,e, brass and carbon steel.

Observation
As the material is elongated (due to the stress applied) the area is reduced. The reduction in area leads the material to its breakdown, apart from few of material was worn down and could be seen under the tensiomenter.
The elongation and reduction in area is noted in both the material. These properties are due to the yield stress that any material has. Brass having lower yield stress breaks with lower stress applied but have more elongation elastic or plastic range (material tend to be less stiff). Carbon steel having higher yield stress has less elongation (both elastic and plastic) but breaks with higher stress applied (material tend to be more stiff).

Result
Brass showed more elongation and Carbon steel showed lesser elongation before it broke. The following schematics are obtained from the graph:
Brass has longer elastic and plastic ranges and lower yield stress and ultimate tensile strength comparable to the carbon steel i.e. carbon steel has short elongation ranges and higher yield stress and ultimate tensile strength.

Conclusion
The higher the yield stress of material, the lesser will be area reduction and hence more force required to deform the material before it reaches its fracture point.




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engineereverything by Asad Ali is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at www.facebook.com. Permissions beyond the scope of this license may be available at http://engineereverything.blogspot.co.uk/2012/04/copy-right-note.html.