caes1507 professional and technical written communication for engineers
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CAES1507 Professional and Technical Written Communication for Engineers. Session Six Theory and Design. Feedback on Introduction. The background has to be adequate to justify the prototype invention Be sure the information about the request for the project is correct - PowerPoint PPT PresentationTRANSCRIPT
CAES1507 Professional and Technical Written Communication for Engineers
Session SixTheory and Design
Feedback on Introduction The background has to be adequate to justify
the prototype invention Be sure the information about the request for
the project is correct Pay attention to the use of tenses
Background – Present and/or present perfect tense Purpose of the project – Past tense Purpose of the report – Present tense
Avoid using personal pronouns and possessive adjectives such as “I” and “our”
Feedback on Introduction Use formal tone
Bear in mind that you’re asked to design and build a prototype of the toy to be considered for mass production, NOT the toy itself yet
Stick to the requirement of the project and what you’re really going to cover in the report
Theory Other engineers need to know WHY you have
done what you have done in your design so that they can duplicate it or improve it or change it in some way
Include formulae if necessary but you must explain why you have included them.
Use theoretical principles to explain why you have made the choices you have in your first design and why you made the changes you did in your second design.
Theory PRESENT TENSE should be
used unless you refer specifically to your project, for which PAST TENSE is used
You should include graphic information.
Example – What information is included?
The simple law of gravity maintains the mousetrap in a state of rest until a mouse enters the system introducing an external force that activates it. When the mouse enters the trap, it creates a force on the system due to its weight. The force puts tension on the wire activating the other parts connected to it. See Figure 1.
A general description of the overarching theory used
Explanation of theorywith specific referenceto the prototype
Refer to diagram
Example – What information is included?
The fixed pulley in the prototype mousetrap is used to change the direction of tension in the strings. The pulley is used so that the tension of the string can be transferred from one part to another even if the string is bent or twisted.
A prototype also uses a simple lever system requiring a pivot point as shown in Figure 1.
Explanation of functions of specific parts using Engineering principles
Other relevant engineering principle
Critical Thinking How would you propose to
IMPROVE the example in the booklet?
Writing Tips1. Identify the theory/mechanism
involved in the design2. Include equations/mathematic
formulae if necessary3. Give examples to illustrate how the
theory is being applied in your design4. Include diagrams or any other forms of
graphic information which aids explanation + Label the main parts of a diagram
Questions to be answered in the Theory sections What theory or theories have you used
in your prototype design? How is the respective theory used in a
component of your prototype? Does the use of a mathematical/physics
equation help in explaining the mechanism of a component of your prototype? If so, how?
In-Class Practice Task – How do Roller-Coasters Work?
Work in groups, write the theoretical principles behind the operations of roller-coasters. Your work should include sketches of diagrams and relevant equations.
Design Identification of the major parts of
your prototype Insert graphics (overall design +
different parts) Describe the structure - major
parts (no need to include the procedures of making them, which is in fact the focus of next session)
Describing the major parts Provide a name of the part being
described Identify the major function of the part Describe the function of each smaller
component Provide the specifications (e.g. The light
bulb will glow when activated indicating a mouse is trapped)
General
Specific
Name of the major part
Function of the major part
Function of smaller parts
Specifications of smaller parts
Points to Note - Language Present Tense should be used Signposting is needed to signal the
structure of your Design Orientation –
The bottom of… On the right hand side of … On top of… Kitty corner to… At the top right corner of…
Points to Note - Language Quantity –
Two plastic wires… Three wooden boxes …
Reference pronouns – This / it (make sure the readers know
what ‘it’ refers to)
Points to Note – Graphical Representations Include diagrams (and must be
referred to in your text, e.g. Figure 1, as shown in Figure 4)
Include a caption for each diagram (e.g. Overall design of the burglar alarm)
Label all important parts
An ExampleThe overall design of the mousetrap (figure 1) can be divided into three main parts, the base, the light box and the side track. The following sections illustrate the overall and completed design including the structure and function of each part.
General Introduction of the design – the components of the prototype
Signposting – i.e what will be included in the following sections
An Example
The base in the main body of mousetrap. This is where the mouse enters and is trapped. The bottom of the base is a movable platform which is used to activate the whole system.
Introduction of the component part
An ExampleOn the two side walls, there is a wooden stick settled in a track on each side and connected to the platform by plastic string. The wooden sticks are used to lock and unlock the gate in front. The gate is a sliding section which covers one side of the base. When it is released it slides down to enclose the mouse completely in the box. On the left hand side wall, a little box which has an inclined bottom and a hole on one side is attached.
Fairly general description of the structure and mechanism
Information: Structure of
the part Function of
the part
An ExampleThis box is used to trap a marble and the marble is trapped by another wooden stick which is also connected to the platform by wire. Two plastic wires are connected to the platform and then to the light box. The structure of the base and the inner mechanism of the base are shown in Figures 2 and 3.
Always refer to relevant diagrams
Present Tense is used
Comparison – Which description is better? Read the other version of the
discussion of the Light Box design on page 31. Compare this version with the original on the same page. Which one do you think is better? Why? (Hint: think about the logical development)
Version one Function of the box
How it works
Size of the box
Mechanism
Refer to figures
Version Two Refer to figure 4
Size of the box
Function of the light box
How it works
Refer to figure 5
Mechanism
General
Specific
The Side Track1. consists of2. used3. are activated4. is released5. rolls and falls6. to make contact7. show
Is made up of + people/materials
Is made of + materialsIs made by + people
Homework Write the Theory section in group outside class. Hand
in the hardcopy to the class teacher in the next lesson.
Start building the prototype for demonstration in Session 8.
Start drafting the Design section in group outside class. You will be required to hand it in Session 8.
Secretaries of the second meeting need to hand in the minutes (in hard copy) in the next lesson. Make copies of your minutes for your group members.