Friday, 23 April 2010

Migration case study: Poles to the UK

I have summarised this case study in 4 short videos. Also, I have exam answers on this topic but you will need to email me to see them komillachadha@gmail.com

Introduction to the case study:






Impacts on source region







Impacts on host regions





The future.....


Monday, 19 April 2010

Section A advice - specimen paper



This video aims to go through 3 groups I would write about in the specimen English Language paper. It has been created by Komilla Chadha and a-level English Language student.




This is what happened - I got an A!

Friday, 16 April 2010

Does global warming matter?

The video below aims to answer two questions: (i) Do the causes of global warming matter? (ii) Does global warming itself matter?







Some geographical definitions:


Carbon sink - This us dense and cold water in the Southern Ocean that has the ability to absorb carbon dioxide.
Exponential - doubling each time.
Global conveyor belt - another term for thermohaline circulation
IPCC- Intergovernmental panel on climate change*
North Atlantic Drift- This is the warm water that flows past Northern Europe (on the west coast).
Saline - salty
Thermohaline circulation - flow of warm and cold water that circulates around the world's oceans.


*IPCC


Job: They evaluate the various risks that global warming presents, They do not actually measure climate change they just produce special reports on the effects.It formed so that a better understanding of the implications of this new phenomena. 

Thursday, 15 April 2010

Kant's rejection to human embryo research DISPROVED!

This video aims to disprove that Kantian ethics is against human embryo research.





Kantian ethics revolves around duty. He states 4 example - two perfect and two imperfect duties. One of the imperfect duties is to make people happy. In order to this human embryo research would be one way. So for example, when someone breaks their tooth, it would make them happy if someone told them they could grow a new tooth and have it. This could happen to millions right around the globe for different problems. However, according to neo-Kantians it is also our duty not to do human embryo research as it goes against the maxims e.g. it would be hard to universalise, we are using the embryo a potential human as a means to an end etc. So as you can see we arrive at the dilemma that the two duties conflict.


This has always been a weaknesses to Kant's ethical system. Kant responded to the conflict by saying when ever this happens this means that one of these duties is not true. As it is his theory, if we follow it then we see that most definitely it is our duty to make people happy - he gave it as an example of imperfect duties. This means our duty to not conduct human embryo research must be false. This means that he wouldn't be against it. In fact I believe he would be for it because it is a method by which we can fulfil the imperfect duty.

Wednesday, 14 April 2010

Can a depression be classified as an extreme weather event?

Describe how the depression shown on this chart might produce extreme weather hazards.
What is an extreme weather event?
It is severe or unusual weather conditions e.g. hurricanes which cause severe impacts on the environment, people and economy.

What are the weather conditions shown in this map?
Firstly there is a depression. The pressure is below 1000mb (low pressure) and winds are blowing in an anti-clockwise direction. There is also quite a small gap between isobars showing winds are strong which fits in the model of a depression. There will be a large cloud cover as a depression is when warm air meets could air and this causes the warm air to cool resulting in precipitation. The depression has built up through cold and wet conditions in the Arctic Ocean. The Polar Maritime air mass is the main one associated with this weather system.
There is also a cold front passing through South East of England. Traditionally, in low pressure conditions we see occluded fronts forming on the actual land but even if it is close there will still be torrential rain on land. In this front the cold air advances and force the warm air to rise sharply. The result of a cold front is a rapid period of torrential rain.
So what are the risks with this condition?
  1. Firstly, temperatures can become extremely low bringing many health risks like hypothermia especially to children and the elderly.
  2. Torrential rainfall can lead to river flooding which especially with cold fronts lead to flash floods. The can cause many adverse effects  for example the Boscastle 2004 flash floods caused injuries, £2 million damage to buildings and roads and coastal pollution as debris and fuel from cars flowed out into the sea.
  3. In extreme situations could lead to a snowstorm or blizzard which as we saw in February 2009 causes disruptions and deaths.
  4. It could lead to high waves and surge may be destructive to the coast.
  5. In the case of flooding if sewage systems failed then they would be a risk of cholera and other disasters.

Monday, 12 April 2010

Economic Glossary

Still in the making...The links in the word link to the appropriate post.


A


Aggregate demand: Total (planned) expenditure in the economy on goods and services.


Aggregate supply: Total supply of goods and services in an economy. 


B
C


Consumption: Total expenditure of individuals and families on goods and services.


D


E



Economic Efficiency: This is an economic state in which every resource is optimally allocated to serve each person in the best way while minimizing waste and inefficiency. 




F


Full employment: Everyone willing and able to work has a job at a current wage.


G


H


Hire Purchase: If the buyer is not able to purchase something by lump-sum then they may wish to play it on a monthly rent to the owner with interest. Once the entire cost has been paid for they can decide either to pay some more and keep the good or return it back to the owner.


I



Income Elasticity of Demand: This is the measure of the sensitivity of demand to changes in income. It is also useful for establishing the nature of the good or service in concern. This is calculated by change in quantity demanded/ change in income.


Interest rates: The cost of borrowing money and the reward for saving money.


Investment: Total expenditure of businesses on goods and services. It is circa 18% of aggregate demand.


J
K
L


M



Marginal Product of Labour: This is the amount of output gained for employing one more unit of labour. It is calculated by the change in total product/ change in labour. 
Marginal Utility: This is the utility or satisfaction gained fro consuming more unit. This is calculated by change in total utility/ change in quantity of consumption.


Mortgage interest-repayments: The interest required to pay to the bank for taking out a mortgage.


N
O


P


Productivity: Output per unit of input.


Q
R
S
T
U
V
W
X
Y
Z

Friday, 9 April 2010

Measuring Inflation

This video below aims to explain how inflation is measured in 3 minutes. Hope it helps.





I don't actually believe I did a very good job at this video so I would suggest you check Pajholden's video out: http://www.youtube.com/watch?v=0MmOiDhYC-s&playnext_from=TL&videos=JgdHNmZkeCU&feature=rec-LGOUT-exp_fresh%2Bdiv-1r-2-HM