[Year 12 Its] Post mortem Section B

[Kevork Krozian]

Hi Folks,

   Just reading through Section B again and my thoughts ( final )  for your 
consideration.

Q 8 -- Another hazard would be security or lack thereof. Greenhouses are not 
known for tough exterior walls so I guess theft of the computer and a trip 
to cash converters might be tempting for some.
 Protection would have to come via a solid construction room inside or 
attached to the greenhouse with all six sides ( walls , floor and ceiling ) 
to be strong enough not to be breached and probably alarmed ( and cooled ) .


A10 - Dial up is too prohibitive ( are there phone plans that cap the local 
call costs per month ?? ) whilst ideal for the data volume.
         Broadband is overkill for data volume but affordable for fixed 
capped cost per month.
         Microwave is possible it seems ( up to 5 km --  
http://www.corning.com/docs/opticalfiber/wp6321.pdf ) but we have no idea 
about installation cost, any recurrent costs and whether maintenance may 
come into it. I am thinking Lucy would be responsible for her own 
maintenance once installed.  Not a nice choice. But what are the examiners 
seeking as justification to rule it out ? Cost ?

Q 11 -- If Lucy wants to compare data ( humidity, temp , light ) over 
different times of the year to decide what the best growth conditions are I 
am guessing she needs to do lots of data access .  Ok, so if that is the 
case , of her file storage options she can use random access or sequential. 
Sequential would be too slow as the device has to read everything between 
current location and desired location . So random access would be better 
wouldn't it ?
    If we are suggesting sequential is better because it allows 
export/import that would only be the case after all the year's data has been 
entered after which a single export would then be ok for use in other 
applications.  ( Then again, why wouldn't a random access file not export 
equally well ?  ) But Lucy may want to monitor things throughout the year 
and for that reason I am inclined to think the examiners' are looking at 
random access for speed.
  As for each record being the same size, I thought that was a given as data 
is sampled every 5 mins. We would like temp, humidity and light consistently 
every 5 mins to go into 1 record.

  The VET IT exam was on today -- anyone want to meet me on that list for a 
chat ?  And we are still running Cisco exams Semesters 2 and 4 ( securing 
routers with access lists and configuring LANs and WANs with Frame Relay , 
NAT and PAT-  any takers there ?? ::))

See you all next week at the big one ( VITTA conference )

Kevork Krozian
Mailing List Creator and Administrator
kevork at edulists.com.au
www.edulists.com.au
Tel: 0419 356 034
----- Original Message ----- 
From: "Mark Kelly" <kel at mckinnonsc.vic.edu.au>
To: "Year 12 Information Technology Systems Teachers' Mailing List" 
<is at edulists.com.au>
Sent: Monday, November 13, 2006 2:17 PM
Subject: [Year 12 Its] Post mortem erratum - B7a


> In B7a, my original answer to the second test case was "Close" based on 
> the action of the first IF statement. Thanks to a perceptive student who 
> emailed to correct: it should be (close, then) *Open*.
>
> The t=34 triggers the first IF statement (which closes the curtain). It 
> was at that point that I stopped reading and moved to the next question...
>
> But then in the second IF statement the L=5000 triggers the curtain 
> opening. So the curtain closes, then opens, so the algorithm finally 
> produces an OPEN status - which is what the question asked. Ooops!
>
> -- 
> Mark Kelly
> Manager - Information Systems
> McKinnon Secondary College
> McKinnon Rd McKinnon 3204, Victoria, Australia
> Direct line / Voicemail: 8520 9085
> School Phone +613 8520 9000 << new number!
> School Fax   +613 9578 9253
>
> Webmaster - http://www.mckinnonsc.vic.edu.au
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> Moderator: IPM Mailing List
>
> Doctor - We must all face reality sooner or later.
> Dowd   - I wrestled with reality for 35 years, doctor, and I'm happy to 
> say I won out over it.  ('Harvey', 1950)
>
>
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