Re: urgent help with document
- From: "Dave Carlson" <dgcarlson@xxxxxxxxxxxxx>
- To: <jfw@xxxxxxxxxxxxx>
- Date: Mon, 3 Aug 2009 07:43:14 -0700
Chris,
I could read it fine, as well. 11 pages. Here's a text version, if it helps.
Dave
----- Original Message -----
From: "Chris Hallsworth" <christopherh40@xxxxxxxxxxxxxx>
To: <jfw@xxxxxxxxxxxxx>
Sent: Monday, August 03, 2009 04:09
Subject: Re: urgent help with document
Let me try on this list then but I think it will get stripped. I forgot to
mention, before converting the table to text I could see it with the JAWS
cursor. Also navigating to the rightmost column of the table I was able to
read it. I'm not however used to that layout so converted it to text.
Anyway, hope you all get this.
--
Chris Hallsworth
E-mail: christopherh40@xxxxxxxxxxxxxx
MSN: ch9675@xxxxxxxxxxx
Skype: chrishallsworth7266
Klango: chrishallsworth
--------------------------------------------------
From: "Curtis Jackson" <cjackson102@xxxxxxx>
Sent: Monday, August 03, 2009 12:03 PM
To: <jfw@xxxxxxxxxxxxx>
Subject: RE: urgent help with document
> If you're simply trying to attach the document you can go to the insert
> menu
> and choose attach file
>
> -----Original Message-----
> From: jfw-bounce@xxxxxxxxxxxxx [mailto:jfw-bounce@xxxxxxxxxxxxx] On Behalf
> Of Chris Hallsworth
> Sent: Monday, August 03, 2009 6:00 AM
> To: jfw@xxxxxxxxxxxxx
> Subject: urgent help with document
>
> Hello all,
> Could someone please write to me off list so I can attach a document? It's
> a
>
> resit assignment documentation and I can't read certain parts of it as
> JAWS
> keeps saying blank blank blank. I tried changing the font with no go. I
> even
>
> tried converting the table to text thinking it was a layout issue and
> still
> no go. I even tried saving it as HTML but the converted web page didn't
> even
>
> show the part at all! But I know it's there as there's lots of blank blank
> blanks. Anyway, all help would be greatly appreciated. I'd like to start
> on
> this today or tomorrow if possible.
> Thanks in advance.
>
> --
> Chris Hallsworth
> E-mail: christopherh40@xxxxxxxxxxxxxx
> MSN: ch9675@xxxxxxxxxxx
> Skype: chrishallsworth7266
> Klango: chrishallsworth
>
> --
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HND Computing & Information Systems
N03: Software Constructs and Tools
Resit Assignment 2: Top-Down Design and Development
?The method of top-down design, then, is simply this: decompose the overall
problem into precisely defined subproblems, and prove that if each subproblem
is solved correctly, and these solutions are fitted together in a specified way
then the original problem will be solved correctly.? 1
Structure of the Assignment - the tasks are organized into three sections
Section A: Design & Development following Problem Investigation
Section B: System Revision 1 ? Securing the system
Section C: System Revision 2 ? Extending the system
Students who complete:
Only Section A will be eligible for: a Pass grade, i.e. a mark in the range 40
- 49
Section A and Section B will be eligible for: a Merit grade, i.e. a mark in the
range 50-69
Section A, Section B, and Section C will be eligible for: a Distinction grade,
i.e. a mark of 70 or greater
The particular learning outcomes to be tested are:
?A student must investigate problem solving theory, applications and
techniques.?
?A student must design and develop code using an appropriate programming
methodology?
Section A:
Design and Development following Problem Investigation
Problem Investigation 24 %
Designing the Code 10 %
Developing the Code 10 %
Testing the Code 5 %
Total Section A: 49%
Section A contd.
Section B:
Securing the System
Problem Investigation
5 %
Designing the Code 10 %
Developing the Code
5 %
Total Section B: 20%
Problem Investigation of no more than 3 pages in length:
The Port of Riga on the Latvian coast of the Baltic Sea handles operations at a
number of different Docks. The Port is fully equipped with support facilities
for three types of specialist staff: Customs Agents, Freight Agents and Marine
Safety Inspectors who provide the necessary processing for cargoes landed at
Riga. Strict guidelines are in place to ensure that, for all vessels docking in
the Port, there is a guarantee that appropriate staffing levels have been
specified according to the differing needs of the six types of vessel that the
Port accepts. It may help you to read over extracts from a number of interviews
that were carried out ? these are included in Appendix A: Interviews in this
document.
The Management team at the Port wish to investigate the use of a basic, no
frills, system to ensure that details of the acceptable vessel types and the
necessary staffing levels:
* are safely recorded
* can be maintained in a secure environment
* can only be accessed by authorised personnel
A paper-based system appeals to them. The Port has a number of strong safes
that could be used to secure original documents. Photocopies could then be made
and given to staff that require the information.
Begin your investigation by documenting any weaknesses that you can identify in
the idea of creating and maintaining a paper-based system - state the problems
as you see them with short explanations if they are required. This section
should end with a brief list of any other sources of information, or interviews
that you wish to have access to. Submit your documentation.
[Problems with paper-based system: 8 %]
Write up a proposal for how a computer-based system could be used to meet the
Port?s requirements. Study carefully exactly what the Management Team wish to
be investigated ? remember you must convince them of the value of a
computerised solution. Submit your write-up.
[Investigate a proposed computer-based system: 8 %]
Carefully study the explanations given in the Appendix A Interviews. Now
consider in greater detail: (i) exactly what information the new system would
store (ii) the ways in which it could be output to screen and (iii) how the
system could be tested. Write up a description of these features ? it is to be
read by the Port Management Team ? avoid inappropriate use of technical terms.
Submit your write-up.
[System details: 8 %]
Designing the code:
Create pseudo code designs for 4 functions ? note that you may wish to avoid
the use of the data type Text/String in your designs. The requirements for the
functions are as follows:
1. a function to return the number of Customs Agents required for a given
vessel type
2. a function to return the number of Freight Agents required for a given
vessel type
3. a function to return the number of Marine Safety Inspectors required for a
given vessel type
4. a function that will display on screen the details of all of the staff
required to be in attendance for a given vessel type
Submit printouts of your pseudo code designs.
[ 2.5% awarded for each design - total: 10 %]
Developing the code:
Using a suitable development environment create implementations for the four
functions that you designed in the previous section. Your code should be laid
out to a good standard, and all arguments, variables and functions should be
clearly and appropriately named: short comments should be included to support
easy modification of the code at some future date. Submit printouts of your
code.
[ 2.5 % awarded for each function - total: 10 %]
Testing the code:
Using a suitable development environment create the code needed to carry out a
single test of each of the four functions that you implemented in the previous
section. Document your tests and run them: describe the Test Results, include a
total of 4 screen dumps ? one for each function tested. Submit all of this
documentation.
[ 5 % for the documentation - total: 5 %]
Problem Investigation:
Create a short written summary of how access to the system can be controlled by
the use of a ?user name and password? arrangement. Set out how you expect this
to work ? for example:
1. What prompts will be displayed on screen to ask the user to enter
information?
2. What prompts will the system issue if either, or both, of the values entered
are invalid?
3. What limit might be set on the number of login attempts allowed?
Answer these questions but avoid getting bogged down in too much detail in your
explanations. Your goal should be to write an explanation in standard English -
the reader should not have to try and understand any special technical terms.
Including a short example could be very helpful. Submit your summary.
[ Investigate the problem of controlling access to the system: 5 %]
Designing the code:
By making use of your knowledge of arrays and how to search them create pseudo
code designs for two functions: one to search for a match on a ?user-name? and
the other to search for a match on a ?password?. Then design ? in pseudo code
? a third function that will display prompts on screen and then read the user?s
inputs. The design of this third function should include function calls to be
made to the two functions that you have just designed for matching user-names
and passwords. Course lectures included instruction on writing pseudo code to
read user input. Note that you may wish to avoid the use of the data type
Text/String in your designs. Submit printouts of your pseudo code designs.
[ Design the code to restrict access to authorised staff only: 10 %]
Developing the code:
Using a suitable development environment create implementations for the
functions that you designed in the previous section. Your code should be laid
out to a good standard, and all arguments, variables and functions should be
clearly and appropriately named: short comments should be included to support
easy modification of the code at some future date. Practical classes included
instruction on how user input should be read. Note that you may wish to avoid
the use of the data type Text/String in your designs. Submit printouts of your
code.
[ Developing code to authenticate user logins: 5 %]
Section C:
Extending the System
Integrating User Login 5 %
Problem Investigation 5 %
Developing and Running the Code 21 %
Total Section C: 31%
Integrating User Logins:
Integrate the code that you developed in Section A (to display details of the
staff required for berthing a given vessel type) with the login control system
that you developed in Section B. Your system should now only display
information to properly authenticated users. All code should be written to a
high standard. Submit printouts of all of the new code that you have written in
order to get this new system up and running.
[ Integrating User Logins: 5 %]
Problem Investigation:
Develop a pseudo code design for a function getShipsInDockNumber(?) that ? once
given the total number of vessels, of each type, expected for a given week ?
would calculate the number of those that would be berthed in a specified Dock.
Create a short written summary of what screen prompts should be displayed by
the system in order to obtain the necessary user input for this function.
Submit your summary.
[ Problem Investigation: 5 %]
Developing and Running the Code:
Using a suitable development environment write the code to create a function
that will display the screen prompts and store the input from the user that you
summarized in the preceding Problem Investigation.
Now take your pseudo code design for the function getShipsInDockNumber(?) and
write all of the code needed to implement it ? this may require you to design
and code additional functions. Note that you may have to make further sensible
assumptions about the operation of the Port ? document any assumptions that you
make.
Finally a call to this new function must be added in to the screen-
prompt-and-user-input-reading function that you have previously developed in
this Section. The value returned by the calculation should be output on screen
for the user to read.
All code should be written to a high standard. Submit printouts of any new
pseudo code designs and all of the new code that you have written in order to
extend the system as required. Include any documentation on further assumptions
that you made.
[ Developing and Running the Code: 21 %]
Appendix 1: Interviews
The following information was gathered by interviewing staff at the Port. It is
presented here to assist you with this Top-Down Design and Development task.
The client was asked: ?How do you know how many Customs Agents have to be
available when a ship docks in the Port??
The client answered: ??for an Oil Tanker only 1 Customs Agent is needed, if
it?s a Container Ship then that?s a lot of cargo ? that needs 4 Customs Agents.
For a Roll-on Roll-off Ferry 2 Customs Agents are needed, for Bulk Carriers
only 1 Customs Agent is needed, for Passenger Cruise Ships 2 Customs Agents are
required and for Factory Ships only 1 Customs Agent is needed.
We use codes for these: just single letters ? ?o? for Oil Tanker, ?c? for a
Container Ship, ?r? for on Roll-on Roll-off Ferry, ?b? for a Bulk Carrier,
?p? for a Passenger Cruise Ship, ?f? for a Factory Ship. Is that clear??
The client was asked: ?How do you know how many Freight Agents have to be
available when a ship docks in the Port??
The client answered: ??for an Oil Tanker only 1 Freight Agent is needed, if
it?s a Container Ship then that?s a lot of cargo ? that needs 6 Freight Agents.
For Roll-on Roll-off Ferries and for Bulk Carriers 2 Freight Agents are needed.
For Passenger Cruise Ships and for Factory Ships only 1 Freight Agent is
needed.
The client was asked: ?How do you know how many Marine Safety Inspectors have
to be available when a ship docks in the Port??
The client answered: ??an Oil Tanker is a big job ? that needs 3 Marine Safety
Inspectors, if it?s a Container Ship then that still needs 2 Marine Safety
Inspectors. For Roll-on Roll-off Ferries and for Bulk Carriers only 1 Marine
Safety Inspector is needed. For Passenger Cruise Ships 2 Marine Safety
Inspectors are required, and for Factory Ships only 1 Marine Safety Inspector
is needed.
The client was asked: ?How do you know where a ship docks in the Port??
The client answered: ??Dock Number 1 is the Deep Water Anchorage, it is used by
Oil Tankers ? technically a Passenger Cruise Ship could also use the anchorage
but that would only be in an emergency. Dock Number 2 is the Large Cargo Dock -
it can be used by: Bulk Carriers, Container Ships, and Factory Ships. Dock
Number 3 is the General Cargo Dock - it can be used by: Container Ships,
Passenger Cruise Ships, and Roll-on Roll-off Ferries. Dock Number 4 is the
Ferry Dock and it can only be used by: Roll-on Roll-off Ferries.
The client was asked: ?How do you decide which Dock a ship will be berthed at??
The client answered: ??a berthing for a ship is pencilled-in 16 weeks prior to
its arrival ? and the lists are drawn up by considering one week at a time.
Knowing - well in advance - the workload for a week is important. We have to
then arrange to have enough facilities available for all of the Customs
Officers, Freight Agents and Marine Safety Inspectors who will be needed. The
Port can turn around 5 ships a week at the Deep Water Anchorage (Dock 1). In a
week 8 ships can be turned around at the Large Cargo Dock (Dock 2). The Port
can turn around 16 ships a week at the General Cargo Dock (Dock 3) and the Port
can turn around 30 Ferries a week at the Ferry Dock (Dock Number 4).
1 The Design of Well-Structured and Correct Programs, Suad Alagi?, Michael A.
Arbib, Springer-Verlag, New York, 1978.
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Summer, 2009 N03: Software Constructs and Tools Resit Assignment 2
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