Air Conditioning and Refrigeration History - part 4 Market forces and other concerns continued to drive innovations. Led by Thomas Midgley, chemical engineers at Frigidaire solved the dangerous problem of toxic, flammable refrigerants—which had been known to leak, with fatal consequences—by synthesizing the world's first chlorofluorocarbon, to which they gave the trademarked name Freon. It was the perfect refrigerant, so safe that at a demonstration before the American Chemical Society in Midgley inhaled a lungful of the stuff and then used it to blow out a candle. In the late s, however, chlorofluorocarbons were found to be contributing to the destruction of Earth's protective ozone layer.
A number of groups, owing allegiance to some political ideology or some particular religious beliefs, have chosen the path of violence and terror to achieve their objects.
These vested interests are rabid fundamentalists or fanatics having no sanctity for life. The know no principles or values. They believe in the power of the gun and want to achieve their objects overnight. While some of these groups are fighting for control over some pieces of land, others are fighting for spreading their own ideology or religious philosophies.
They choose to defy public opinion Air conditioning systems essay refuse to see reason. They think that their own view point or stand is the only right view point or stand, and that they have a right to convert other people to their thinking by force.
For this avowed purpose they do not hesitate from committing the worst of crimes including murder of innocent citizens, looting or burning property, kidnapping people, hijacking planes and creating terror in one way or the other.
Some of the important terrorist organizations operating in different parts of the world have already been identified.
The number of these organizations is so large that it is difficult to list them out. They have their own training systems where they catch hold of young boys and indoctrinate them in subtle ways through guile, treachery, temptations or money. Some of the Madarsas being run by Muslim fundamentalists are allegedly involved in this type of activities.
It would on September 11, that the world woke up to the dangers of this terrible menace. They hijacked four US planes from some US civilian airports. While one of these planes hit against the US headquarters in Pentagon, another two planed brought down the towering World Trade Centre, killing at least innocent US citizens.
The fourth, luckily, missed the target. It was, the reports say, scheduled to hit the White House, the residence of the US president. In a massive attack, the Talibans were defeated and destroyed and a new government came to control Afghanistan.
Similarly America attacked Iraq as President Saddam himself appeared to be a big terror. Iraq was badly damaged.
A group of terrorists trained in Pakistan attacked the Indian Parliament House on December 13, even when the Parliament was in session. The Indian security personnel killed all the five attackers on the spot but the incident shook whole of the country and the world.
The war against terrorists is continuing and the world community has decided to continue to fight till terrorism is fully wiped out from the face of this earth. The UNO has, in a resolution, called upon various nations to join hands and work as United Alliance to face this threat of terrorism anywhere at any time in the world.
Terrorism has already taken a heavy toll of life and property. The law of the jungle will take us nowhere. We can only pray for good sense of prevail so that the world is able to share and enjoy the blessings bestowed upon mankind by new leaps in the field of science and technology.Diploma Programs, Southeastern Technical College offers programs in Business, Computer/IT, Healthcare, Technical, Industrial and .
The first centrifugal refrigeration machine invented by Willis H. Carrier, the father of air conditioning, is pictured in Syracuse, New York in This started with a tweet.
I’m embarrassed how often that happens. Frustrated by a sense of global mispriorities, I blurted out some snarky and mildly regrettable tweets on the lack of attention to climate change in the tech industry (Twitter being a sublime medium for the snarky and regrettable).
Climate change is the problem of our time, it’s everyone’s problem, and most of our problem. The table below presents an abbreviated geologic time scale, with times and events germane to this essay.
Please refer to a complete geologic time scale when this one seems inadequate. An air conditioning system is rather simple really in the amount of parts it's made up of. In reality, the system is made up of 2 main components, the condenser and the coil. An air conditioning system is rather simple really in the amount of parts it's made up of.
In reality, the system is made up of 2 main components, the condenser and the coil.