For many years, the principal means of probing the ocean using sound has been through the use of 'active' or 'passive' techniques. With an active system, an object is illuminated by a pulse of sound and its presence inferred from the echo it produces, whereas the passive approach involves simply listening for the sound that the object itself emits.  Measurement of acoustic signals is possible if their amplitude exceeds a minimum threshold, determined partly by the signal processing used and...
Wind comes from the suns uneven heating onto the earth surfaces, as hot air raises cold air sinks; there is a change in pressure, from high to low. Hence the change in pressure generated the movement of the air, as such wind is produced. Wind can be identifying as air in motion. Application of wind came a long way back to the past; during ancient time, sea explorers use wind with the help of the sails to sail through the seven seas. As for agriculture, farmers built simple windmills to grind...
Nowadays, the principle of renewable energy is deeply attached to our societies. All around the world, countries are developing their energy supply systems by using renewable energy (RE) devices. Europe is leading the way, with several countries really engaged with green energies as Scotland. However, why Scotland had chosen to invest as much as possible in sustainable power plant? Off course, and like every European countries have to respect their engagement to European union which are before...
Wetland habitats are recognized among the most productive environments in the world. They support biological diversity, water quality, nutrient cycling, and carbon sequestration. Innumerable species depend on wetland environments: birds, mammals, reptiles, amphibians, fish, and invertebrates. Despite these contributions, the loss of wetlands continues globally; close to 50 percent of Earth's original wetlands have been completely lost. Wetland habitat is declining mostly due to land use change,...
Green house gases, comprising of water vapour, nitrous oxide, carbon dioxide and methane are the main contributors for the cause of global warming which is a risk to the earth's climate and ecosystem. Recent events ranging from flash floods to hurricanes and heat waves to extreme cold temperatures have shown how erratic the weather has become. Thus far, these weather patterns have shown no signs of improvement. According to a United Nations (UN) report, these green house emissions that are...
Contaminated land risk in Gui Yu arises from the disordered heap of electronic wastes and primitive processing of them. The single largest pollution source is the recycling depot where people stockpile unprocessed electronic wastes. Other contamination sources (such as stoves used to smelt circuit boards) scattered unevenly in the town since most workers/ residents store and recycle e-wastes at their home. Therefore, the team decides to take a targeted sampling strategy with the geographical...
For a long time, the world has been relying on energy from fossil carbon that has for many reason dominated the energy market because it is easy to transport, among other reasons. As time passes by, the energy on earth is increasing. The earth itself from its mode of formation absorbs solar energy from the sun and stores it in its epicenter and it can not emit it back in the same rate. This adds to the many forms of energy that man is creating and using everyday. Therefore, the energy at man's...
Over the past decade, the Information and Communication Technology (ICT) industry has become one of the fastest growing industries in several countries in the world including Mauritius (Kencki, 2008). The number of Business Process Outsourcing (BPO) and Information Technology (IT) companies has been constantly increasing similar to the number of users utilising computers and Internet at home or educational institutions. Also, more and more companies and organisations are now adopting IT...
Our climate is rapidly changing all around us. Ice is melting, plants are dying, animals are in danger, and habitats are being destroyed. The Arctic is greatly affected. The ice is melting and causing water levels to rise, and animals are dying because of loss of habitat. Over the past one hundred years, the average surface temperature has risen a little over 1 degree Fahrenheit. (Baker, 4) Climate change happens because of humans and natural reasons. Humans are not being careful and are not...
Material and energy resources management includes the proper selection, installation and managerial of it in manufacturing will give impact on the production process, energy consumption and even reduce the pollution. Manufacturer objective towards sustainable manufacturing is maximize the production while minimize the usage of material and energy resources because the price of the material and energy had increased due to depleting of materials and non-renewable resources (Leahu S., 2012). The...