This article enlightens on the use of wind power as an alternate energy, advantages of wind power and future trends in this important technology.

What is Wind Power?

Wind power is a kind of solar energy because it is the tremendous temperatures of the sun that are responsible for its creation. Solar radiation heats all elements of the earth surface, though the amount of heat absorbed is different for all the structures. During the day, the earth is normally heated and cold during the night. The earth is heated because of the liberation of heat by different sources such as stones, sand, gravel, and bricks. According to the physical laws, the hot air travels upwards thereby decreasing the atmospheric pressure near the earth's exterior, and cool air is pulled towards the earth's surface. This relocation of air is called wind.

Kinetic Energy Of Wind

During the earlier days, wind power was effectively used for the operation of windmills and grinding of grains. The wind is created because of the movement of air, and the wind created by this process possesses substantial kinetic energy that can be effectively utilized to augment the other forms of energy. Wind power is considered to be a better technique for the electricity generation than other types. Wind power has been developed by using modern techniques, and is now being efficiently utilized for the wind turbines that generate clean energy for use by the industries and communities.

Wind Power As A Renewable Energy

Wind power has the natural advantage of being clean and simple that does not contaminates the water, air or the environment, whereas other the types of energy are not tidy and are responsible for the creation of huge scale of waste materials. Since the availability of wind is unlimited, the source of wind power is reliable unlike other forms of energies whose sources of origin are likely to be diminished.

Future Trends of Wind Power

Due to the fast depletion of oil and coal reserves, studies are being conducted globally to increase the utilization of alternate energies including wind power. Furthermore, since the environmental concerns have become serious in the society due to the increased awareness in this field, the use of wind power is gaining importance being clean and cheaper compared to the other types of energy.

These were the great advantages of wind power.

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Within the period of global sports and games events, stadiums have become the vital factor of each country. All over the globe, there are lots of spectacular stadiums where contests including outdoor sports activities, concerts, or other events are arranged. A stadium usually includes a field or a stage designed according to climate, location, civilization, design, or history. The world stadiums range from multi-million-dollar, all-seated arenas to conventional old round grounds that could most likely do with a bit of TLC and brightly painted walls. In Africa there are total 739 stadiums, Asia having 1283 stadiums, America keeping 294 stadiums, Europe having 4311 stadiums and Middle East having 633 stadiums.

All of these are acquainted with iconic structures for example Brazil's Maracana, the mark II Wembley in London and Spain's Santiago Bernabeu and Camp Nou, but many others are also worth mentioning here. The top best stunning and amazing stadiums in the world include:

Stunning Stadiums in the World

1. Allianz Arena: The first in the list of world's amazing stadiums is Allianz Arena. It is a football stadium located within the north of Munich, Germany. It is the very first stadium of the world, having ever changing colors on its outer surface. It turns into red colour when Bayern Munich show performance, and blue when 1860 Munich performs and transparent white color is seen when the German National team plays.

2. Beijing National Aquatics Center: it is National Aquatics Middle or the Water Cube, situated in Beijing, China. This stadium was made and inaugurated on January 28, 2008.

It was constructed alongside Beijing National Arena in the Olympic Green and supplied for the swimming contests. The stadium's structure came up with the idea of jacketing the cube with bubbles, representing water. National Team plays.

3. Yoyogi National Gymnasium: it is situated in Yoyogi Park; Tokyo, Japan is really a famous area for its suspended roof pattern and design. The arena, created by Kenzo Tange (a famous architecture) was built in between 1962 and 1965. With 13,292 chairs including 9,080 stand seats, 4,124 area seats and 88 œroyal box seating, Yoyogi National Gymnasium is now mainly used for ice hockey and basketball.

4. Beijing National Stadium: it is also known as the Bird's Nest. This stadium located in the Olympic Green, Beijing, China. The arena consists of 9,000 seating for the 2008 Summer Olympics and Paralympics. Beijing National Stadium which expenses the $426 million is famous for its biggest steel structure in all around the world.

5. Olympiastadion Stadium: This beautiful stadium is situated within the heart of the Olympia Park in northern Munich, Germany, Having the spacious capacity of 80,000 seats, the arena is proved to be a most beautiful place to host many major football matches including the 1974 World Cup Final, the Euro Final, the European Cup Finals of 1979, 1993 and 1997. It is made up of Acrylic glass and steel cables.

             Beijing National Aquatics Center                                           Beijing National Stadium                               
          Olympiastadion Stadium


Check and maintain air pressure

With the time, tires lose air pressure and sturdiness. Old tires have more rolling resistance; this leads to more fuel consumption. Make all tires of your car checked by accurate gauge regularly. Continuous running of car also heats up the tires. You can also overcome this thing by using tube-less tires but with these tires it does not mean these do not require tire pressure checks.

Check and maintain tire pressure:

With the time, tires lose air pressure and sturdiness.  Old tires have more rolling resistance; this leads to more fuel consumption. Make all tires of your car checked by accurate gauge regularly. Continuous running of car also heats up the tires. You can also overcome this thing by using tube-less tires but with these tires it does not mean these do not require tire pressure checks.

Avoid extra accessories:

If you have equipped your car with some extra accessories, AC can be an example; fuel burning will be greater then. This can be major issue for small cars. Therefore, for good car fuel economy additional facilities and extra load should be avoided.

Changing shifts:

Changing gears again and again will tend to vary RPMs (Resolution per minute) which automatically use more fuel. Maintaining car speed is best tool to save care fuel efficiently and effectively.

Cheap fuel and filling stations:

In under developed courtiers you would observe large variation in petrol quality from one filling station to other. Impure petrol is dangerous for your vehicle as well as it can increase fuel consumption as well. Always refill the fuel by well known filling station. You must be satisfies about quality of petrol. Cheap fuel will definitely be of poor quality. Be careful! It's the matter of your convenience.

Check your air filter:

Unclean air filter halts flow of air into the engine. It is quite easy to check how old and dirty air filter is. Simple remove the filter and place in sunlight if light is not passing through it, you need to change it .A dirty air filter restricts the flow of air into the engine, which harms performance and economy. Dirty filters damage environment too.


Car care fuel economy is totally an art. If you are good at it you would enjoy all your drives with little regard to inflating fuel prices.

Most people seem to have knowledge of only one type of Critical Path. Moreover, what critical path really is, many have incorrect understanding about it. In this guide, I will explain the two different types of critical paths and you will also learn which one is used in what circumstance.

The two types of Critical Paths are:

1. Longest Path

This type of Critical Path comprises activities which are longest in length than other activities in the project. Longest path could be made of independent activities, in which the one with the longest duration will be critical. Alternatively, the Longest Path could be made of different set of linked activities, the set with the longest duration is Critical in this case.

You might have wondered, why longest length matters and why does that make the activity to be called critical? Well, the answer is simple. The activities with the longest length require more cost, more resources, more time. Furthermore, these activities have more combined risk, more issues. Considering all this, the longest duration activity / set of activities are called critical activities, and these are also called critical path.

You might have heard that the Critical Path determines the length of the project. Well, it is not always the case. Imagine there is an activity that is neither has a predecessor, nor does it have a longest duration, but it falls at end of the project and is independent. Hence it gives you project finish date. Since this activity is not part of activities that finish before it that includes the Critical Path, we can now not say that your Critical Path is determining the total project duration because the last project activity is not part of your Critical Path.

This type of Critical Path is not often used since it is not very important to look for those activities with more no of resources or more cost/risk/issues, etc. The more realistic type of Critical Path is the one described below and that one should always be used.

2. Activities with 0 Total Float 

This type of Critical Path does not have a name but it is formed when one or more activities have Total Float equals to 0. Before I describe this Critical Path type further, first let me explain what Total Float it

Total Float is number of days an activity can be delayed without delaying the project finish date. In other words Total Float is how much you can move activity forward without letting it cross project Finish date.

So, if your project finish date is for example 31 March and you have an activity with finish date 31 March, it's Total Float will be 0 days because it can not be moved further now. Such an activity will become critical. Now, if that activity has one or more predecessor activities, all these will automatically have Total Float 0, since if any of these moves forward, it will push the last one also, and project finish date will be moved forward.

This type of Critical Path is mostly used and is more realistic than the Longest Path. The engineers and project monitoring staff should keep an eye on activities with Total Float 0, so as to ensure these do not delay, since delay in these activities mean your project will be delayed.

Tags: Different Types of Critical Paths, Critical Path in Project Management, What is Critical Path