Showing posts with label concerned. Show all posts
Showing posts with label concerned. Show all posts

Wednesday, January 20, 2010

Taxonomy

LinkGrand.com

the study, identification and organization of organisms according to their similarities and differences. Taxonomy is concerned with the classification of all organisms, whether plant or animal, dead or alive and so fossils are also important. Modern taxonomy provides a convenient method of identification and classification of organisms, which expresses the evolutionary relationships to one another. There are different levels of classification with five kingdoms, beneath which are the phyla, classes, right down to the level of species.

Taken from Dictionary of Science

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Taxonomy is the practice and science of classification. The word finds its roots in the Greek τάξις, taxis (meaning 'order', 'arrangement') and νόμος, nomos ('law' or 'science'). Taxonomy uses taxonomic units, known as taxa (singular taxon).


In addition, the word is also used as a count noun: a taxonomy, or taxonomic scheme, is a particular classification ("the taxonomy of ..."), arranged in a hierarchical structure. Typically this is organized by supertype-subtype relationships, also called generalization-specialization relationships, or less formally, parent-child relationships. In such an inheritance relationship, the subtype by definition has the same properties, behaviors, and constraints as the supertype plus one or more additional properties, behaviors, or constraints. For example, car is a subtype of vehicle. So any car is also a vehicle, but not every vehicle is a car. Therefore, a type needs to satisfy more constraints to be a car than to be a vehicle.


Taken from Wikipedia



Saturday, January 16, 2010

Ecology

LinkGrand.com

the study of the relationship between plants and animals and their environment. Ecology is also known as bionomics and is concerned with, for example, predator-prey relationships, population dynamics and competition between species.

Taken from Dictionary of Science

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Ecology (from Greek: οἶκος, "house" ; -λογία, "study of") is the interdisciplinary scientific study of the interactions between organisms and their environment. Ecology is also the study of ecosystems. Ecosystems describe the web or network of relations among organisms at different scales of organization. Since ecology refers to any form of biodiversity, ecologists can conduct research on the smallest bacteria to the global flux of atmospheric gases that are regulated by photosynthesis and respiration as organisms breath in and out of the biosphere.


Ecology is a recent discipline that emerged from the natural sciences in the late 19th century. Ecology is not synonymous with environment, environmentalism, or environmental science. Ecology is closely related to the disciplines of physiology, evolution, genetics and behavior.


Like many of the natural sciences, a conceptual understanding of ecology is found in the broader details of study, including:




  • the movement of materials and energy through living communities



Ecology is distinguished from natural history, which deals primarily with the descriptive study of organisms. It is a sub-discipline of biology, which is the study of life.


There are many practical applications of ecology in conservation biology, wetland management, natural resource management (agriculture, forestry , fisheries), city planning (urban ecology), community health, economics, basic & applied science and it provides a conceptual framework for understanding and researching human social interaction (human ecology).

Taken from Wikipedia



Tuesday, January 12, 2010

Calculus


a large branch of mathematics concerned with quantities which are continuously variable. The many techniques of calculus were developed by the British scientist Isaac Newton (1643-1727) and the German philosopher Gottfried Wilhelm Leibniz (1646-1716).

Taken from Dictionary of Science

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Calculus (Latin, calculus, a small stone used for counting) is a branch in mathematics focused on limits, functions, derivatives, integrals, and infinite series. This subject constitutes a major part of modern mathematics education. It has two major branches, differential calculus and integral calculus, which are related by the fundamental theorem of calculus. Calculus is the study of change, in the same way that geometry is the study of shape and algebra is the study of operations and their application to solving equations. A course in calculus is a gateway to other, more advanced courses in mathematics devoted to the study of functions and limits, broadly called mathematical analysis. Calculus has widespread applications in science, economics, and engineering and can solve many problems for which algebra alone is insufficient.


Historically, calculus was called "the calculus of infinitesimals", or "infinitesimal calculus". More generally, calculus (plural calculi) may refer to any method or system of calculation guided by the symbolic manipulation of expressions. Some examples of other well-known calculi are propositional calculus, variational calculus, lambda calculus, pi calculus and join calculus.


Taken from Wikipedia

Saturday, December 19, 2009

PLANET EARTH NEEDS YOU!


If you’re concerned about our planet, but not sure what to do, here are nine ways you can help save the environment.


By Rick L. Shallenberger

“The earth is slowly dying, and the inconceivable—the end of life itself—is actually becoming conceivable.”

These words, spoken by Queen Beatrix of the Netherlands, reflect the thinking of people worldwide.

Surveys among young people in the United States and Europe reveal that you are concerned about the environment and for good cause.

Look around you. Chances are you are surrounded by air pollution. You may have to drink filtered or bottled water because the water in your area is polluted.

Landfills around the world are filling up and we are running out of places to put our garbage. It is a serious concern for many nations, especially the United States.

Many lakes and streams are no longer fit for swimming or fishing. Much of the pollution is caused by waste being dumped into the streams and a general lack of care.

You’ve probably heard of the forests being cut down in South America and Alaska. This leads to the extinction of animals and insects that may not have even been discovered yet.

What can you do?

While you can't solve all the world's pollution problems, you can make a difference in helping to save the environment. Too many people think they can't change anything, but that's just not true.

No matter where you are, you do make a difference. The average person in the United States, Canada and Britain discards three to four pounds (up to 1.8 kilograms) of refuse-- daily. The West Germans discard about 2 pounds (.9 kilograms) and the Italians 1.5 pounds (.7 kilograms). Most of that ends up in landfills.

Here is a list of nine things you can do to lessen your personal impact on our endangered ecosystem.

1. Cut down on your trash. Trash can often be reused, repaired or made available to others. Your trash can be another's treasure.

Before you throw something away, whether old clothes, shoes, albums or toys, offer it to someone else.

There are organizations that make used clothing available to the needy. These include charities such as Goodwill Industries and the Salvation Army.

One organization in the United States is looking for old tennis shoes. They clean and relace them and make them available to the homeless. (Those in the United States can send them to World Shoe Relief, P.O. Box 423, Trabuco Canyon, CA 92678.)

2. Up to 18 percent of trash is yard waste. Grass clippings, leaves and vegetable waste can be put into a compost heap. This can be used as mulch and fertilizer for plants and gardens. Talk to your parents about composting your yard waste.

3. Recycle all you can. Check around for places to recycle glass, cans, plastic, newspapers and other paper products such as magazines, junk mail and cardboard.

One archaeologist from the University of Arizona was digging through an old landfill and found a newspaper from 1951. It was still readable after being buried 37 years.

Things generally do not decompose in landfills. We need to recycle all we can.

4. Don't litter. Litter really damages the environment. Plastic is especially harmful because it doesn't decompose for years, if at all. Many animals choke and suffocate on it.

5. Make a habit of cleaning up messes with rags rather than paper towels. Rags can be washed and reused. On the other hand, most paper towels end up in landfills.

6. Car pool, walk, ride your bike or use public transportation to and from school or work. Walking and riding a bike are good exercise and don't pollute the air.

Driving is something we all look forward to, but every car on the road adds to air pollution. Save driving for special or must drive occasions.

7. Plant a tree. (Check with your parents first.) Trees absorb carbon dioxide and every one planted helps cut down on air pollution.

Trees can also save your family in heating and cooling costs. They also help prevent soil erosion and add beauty.

8. Avoid purchasing endangered plants or animals or products made from these species. The extinction of any species can have a serious effect on the ecology. Even things as small as earrings or rings can have products made from endangered species.

The world's lust for ivory has all but wiped out the elephant populations in Africa.

9. Organize a cleanup party. Get a group of friends or your church group to clean up a park or an empty lot in your town. (Check with the owner first.) Recycle what you can and dispose of the trash.

While you can't solve all the world's pollution problems, you can make a difference...

These are just a few things you can do to help the earth. You can make a difference.

Taken from Youth 90 magazine