Reflection

I learned how to use  excel, power point, and how to creat a grafffff.

Case study 5

Case study 5

Q1. How many different things did you count? What were they? In what ways might computers be used to control different things in the supermarket?

 A1.10 different  things. They are the microwave, GPS, gas fill up, car park barrier, Car reverse sensor that goes beep, robot, automatic door, freezer, conveyer belt, pays with the card. The computer controls the air conditioner, the fans, the freezer, the lights, the conveyer belt, barcode sensor, automatic doors and the room temperature.

Q2. Why is it useful to use computers rather than people to control things? What problems might there be if any of the computer systems fail in the supermarket?

 A2. If we use people to control the machines then it will be slower and it is too much for them to control. People will wait for a very long time to get their turn in line.

Q3. Describe the inputs and outputs for the other devices that we have talked about so far. How do the supermarket doors and car park barriers know when to open? Identify other control systems that work automatically in this way.

A3. Microwave’s input is set the time and output is cook food,Alarm clock’s input is set the time and output is alarm on, Car barriers’ input is swap the card or punch the button, and output is open the door, Supermarket door’s input is move to the door and output is open the door.

Q4.What would happen if the instructions were wrong? These instructions assume that the car is in the right place. What would happen if the car were not there? How could they stop this happening?

A4.If the instrument  were wrong , the robot will drop the wind shield and broke it. If the car was not there the robot will automatically stop. They stop this happen by stop the mechine.

Case study 4

Case study 4

1) Q: How could Mussie and Ellie find out whether older people do more for charity than younger people?

    A: They can look at some charity websites and search information they need or they can make questionnaires to some people to figure out their answers.

2) Q: Why does Mussie think that these data prove him right? Why might Ellie think that these do not prove him right?

A: Mussie think that these data prove him right because they looked at the numbers in the data, and it showed that elder people do more charity than younger people. Ellie thinks that these data do not prove him because this data is only from one charity and this might not be the case for all charities and the amount of money given by young people is going up every year, while the amount given by elder people is going down.

3) Q: What questions should they ask?

A: They should ask questions that can help them to figure out the answer, like ask people’s age and donations that they did or time that they spent on charity.

4) Q: How many questionnaires should they hand out? Who do you think should fill in their questionnaire?

A: I think elder people and young people all need to fill in their questionnaires.

5) Q: Which software could Mussie and Ellie use to put the answers into the computer? How can they check that the data are correct? How could they reduce the number of errors in the data? What problems might there be if the data were typed in incorrectly?

A: They put the data in excel in the computer. They can check it by using the spreadsheet model. They can type carefully and check every time they type. If they typed the data incorrectly, they might come to the wrong conclusion when they look at the data later on.

6) Q: What is the best way for Ellie and Mussie to present their results?

    A: They can present their results by graphs (especially pie chart).

nessie

The Loch Ness Monster (Scottish Gaelic: Niseag) is a cryptid that is reputed to inhabit Loch Ness in the Scottish Highlands. It is similar to other supposed lake monsters in Scotland and elsewhere, though its description varies from one account to the next.
Popular interest and belief in the animal has varied since it was brought to the world's attention in 1933. Evidence of its existence is anecdotal, with minimal and much-disputed photographic material and sonar readings. The most common speculation among believers is that the creature represents a line of long-surviving plesiosaurs. The scientific community regards the Loch Ness Monster as a modern-day myth, and explains sightings as a mix of hoaxes and wishful thinking.Despite this, it remains one of the most famous examples of cryptozoology. The legendary monster has been affectionately referred to by the nickname Nessie (Scottish Gaelic: Niseag) since the 1950s.

my profile

Hi my name is Jeremy Hess and i'm Y7. i was born on january 24th, 1999
and i,m student from KIS in hong kong

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My name is jeremy, and I am in year 7.