Tuesday, April 29, 2008

The Bering Land Bridge

The Bering Land Bridge , the Jesuit scholar José de Acosta suggested that the peoples of the Americas arrived via a now-submerged land bridge from Asia as primitive hunters, later settling into sedentary communities and cities. In Notes on the State of Virginia (1781), Thomas Jefferson theorized that the ancestors of Native Americans crossed the Bering Strait from Asia, a viewpoint that came to prevail in the 20th century, as carbon dating and molecular genetics began to shed light on the origins of native populations.

Between the 1950s and the 1980s, the Bering Land Bridge theory came to be viewed as proven beyond any doubt. Most archaeologists came to believe that the native cultures of the Americas had been isolated from the Old World after the closing of the Bering land route, when they were still in the hunter-gatherer stage and developed without any outside influences for the next 9,000 years until the time of Columbus. It was also believed at the time that trans-oceanic travel only became possible in the 15th century, after key advances in Old World shipbuilding and navigation. This belief is supported by the lack of substantial evidence of Old World influences on American civilizations.

Tuesday, April 22, 2008

Transport engineering

Transport engineering (alternatively transportation engineering) is the science of safe and efficient movement of people and goods (transport). It is a sub-discipline of civil engineering.

The planning aspects of transportation engineering relate to urban planning, and involve technical forecasting decisions and political factors. Technical forecasting of passenger travel usually involves an urban transportation planning model, requiring the estimation of trip generation (how many trips for what purpose), trip distribution (destination choice, where is the traveler going), mode choice (what mode is being taken), and route assignment (which streets or routes are being used). More sophisticated forecasting can include other aspects of traveler decisions, including auto ownership, trip chaining (the decision to link individual trips together in a tour) and the choice of residential or business location (known as land use forecasting).

Tuesday, April 15, 2008

Navigational database

Navigational databases are characterized by the fact that objects in the database are found primarily by following references from other objects. Traditionally navigational interfaces are procedural, though one could characterize some modern systems like XPath as being simultaneously navigational and declarative.

Navigational access is traditionally associated with the network model and hierarchical model of database interfaces and have evolved into Set-oriented systems . Navigational techniques use "pointers" and "paths" to navigate among data records (also known as "nodes"). This is in contrast to the relational model (implemented in relational databases), which strives to use "declarative" or logic programming techniques in which you ask the system for what you want instead of how to navigate to it.

Tuesday, April 08, 2008

Software prototyping

Software prototyping, a possible activity during software development, is the creation of prototypes, i.e., incomplete versions of the software program being developed.

A prototype typically implements only a small subset of the features of the eventual program, and the implementation may be completely different from that of the eventual product.

The purpose of a prototype is to allow users of the software to evaluate proposals for the design of the eventual product by actually trying them out, rather than having to interpret and evaluate the design based on descriptions.

Friday, April 04, 2008

Database security

Database security is the system, processes, and procedures that protect a database from unintended activity. Unintended activity can be categorized as authenticated misuse, malicious attacks or inadvertent mistakes made by authorized individuals or processes. Database security is also a specialty within the broader discipline of computer security.

Traditionally databases have been protected from external connections by firewalls or routers on the network perimeter with the database environment existing on the internal network opposed to being located within a demilitarized zone. Additional network security devices that detect and alert on malicious database protocol traffic include network intrusion detection systems along with host-based intrusion detection systems.

Tuesday, March 25, 2008

Split proxy server

A split proxy is a proxy implemented as two programs installed on two different computers. Since they are effectively two parts of the same program, they can communicate with each other in a more efficient way than they can communicate with a more standard resource or tool such as a website or browser. This is ideal for compressing data over a slow link, such as a wireless or mobile data service, as well as for reducing the issues regarding high latency links (such as satellite internet) where establishing a TCP connection is time consuming.

Taking the example of web browsing, the user's browser is pointed to a local proxy which then communicates with its other half at some remote location. This remote server fetches the requisite data, repackages it, and sends it back to the user's local proxy, which then unpacks the data and presents it to the browser in the standard fashion.

Tuesday, March 18, 2008

Hierarchical data model

Hierarchical data model, data is organized into a tree-like structure. The structure allows repeating information using parent/child relationships: each parent can have many children but each child only has one parent. All attributes of a specific record are listed under an entity type. In a database, an entity type is the equivalent of a table; each individual record is represented as a row and an attribute as a column. Entity types are related to each other using 1: N mapping, also known as one-to-many relationships.

Monday, March 10, 2008

Loss of Biodiversity

Farnsworth for example, has found that 25% of all prescriptions dispensed from community pharmacies in the United States from l959 to l980 contained active ingredients extracted from higher plants. A much higher percentage is found in the developing world. As many as 80% of all people living in developing countries, or roughly two thirds of the world's population, rely almost exclusively on traditional
medicines using natural substances, mostly derived from plants.

Wednesday, March 05, 2008

New Mobility Agenda

The New Mobility Agenda is an international institution which while virtual and an open collaborative was originally set up by an international working group meeting at the Abbey de Royaumont near Paris with the support of the OECD in Paris in 1974 to challenge old ideas and practices in the field of urban transport through a long term collaborative program of information exchange, education and peer support.

The Agenda today draws together the experience, expertise and support of more than four thousand individuals and groups world wide in an open collaborative peer network. One of the original proponents of this approach, Professor Mikoto Usui then director of the OECD Development Centre, referred to it in the founding meeting at the “Abbé de Royaumont as an “invisible college”.

Tuesday, February 19, 2008

Printing Technology

Printers are regularly confidential by the underlying print technology they employ; numerous such technologies have been developed over the years.

The choice of print engine has a extensive effect on what jobs a printer is suitable for, as various technologies are capable of dissimilar levels of image/text quality, print speed, low cost, noise; in addition, some technologies are unsuitable for certain types of physical media (such as carbon paper or transparencies).

Another aspect of printer technology that is regularly forgotten is resistance to modification: liquid ink such as from an inkjet head or fabric ribbon becomes absorbed by the paper fibers, so papers printed with liquid ink are more difficult to alter than documents printed with toner or solid inks, which do not penetrate below the paper surface.

Wednesday, January 23, 2008

France

In France the sou (until 1715 sol) was the name of a coin. It was first minted in gold, from the 1200s in silver and during the 1700s in copper. The sou tournois was a 12-denier coin, one-twentieth of the livre tournois (Tournois pound), while the sou parisis was a 15-denier coin. After decimalisation in France, the sou became the name for a five-centime coin, one-twentieth of the French franc(Until the late 1960s, the expression "20 sou" was a synonym of 1 Franc).
To this day, sou is used as jargon for money, as in j'ai pas de sous. "I'm broke", "I haven't got two bob to rub together".


Sou of copper, coined 1767 for Louis XV of France[edit]

Monday, January 07, 2008

Vitmains and Minerals

Vitamins and minerals are substances that are found in foods we eat. Your body needs them to work properly, so you grow and develop just like you should. When it comes to vitamins, each one has a special role to play. For example:
Vitamin D in milk helps your bones.
Vitamin A in carrots helps you see at night.
Vitamin C in oranges helps your body heal if you get a cut.
B vitamins in leafy green vegetables help your body make protein and energy.

Wednesday, December 19, 2007

Ozone Layer

"The ozone layer" refers to the ozone within stratosphere, where over 90% of the earth's ozone resides. Ozone is an irritating, corrosive, colorless gas with a smell something like burning electrical wiring. In fact, ozone is easily produced by any high-voltage electrical arc (spark plugs, Van de Graaff generators, Tesla coils, arc welders). Each molecule of ozone has three oxygen atoms and is produced when oxygen molecules (O2) are broken up by energetic electrons or high energy radiation.

Football (soccer)

Football (soccer)
Association football, commonly known as football or soccer, is a team sport played between two teams of eleven players, and it is the most fashionable sport in the world. It is a ball game played on a rectangular grass or artificial turf field, with a goal at each of the short ends. The purpose of the game is to score by manoeuvring the ball into the opposing goal. In general play, the goalkeeper is the only player permitted to use their hands or arms to propel the ball; the rest of the team usually use their feet to kick the ball into position, occasionally using their torso or head to intercept a ball in mid air. The team that scores the most goals by the end of the match wins. If the score is tied at the end of the game, either a draw is declared or the game goes into extra time and/or a penalty shootout, depending on the format of the competition.
The modern game was codified in England following the formation of The Football Association, whose 1863 Laws of the Game created the foundations for the way the sport is played today. Football is governed internationally by the Federation Internationale de Football Association (International Federation of Association Football), commonly known by the acronym FIFA. The most prestigious international football competition is the World Cup, held every four years. This event, the most widely viewed in the world, boasts an audience twice that of the Summer Olympics.

Friday, December 14, 2007

Christmas Day

Christmas is a enjoyable religious holiday when Christians rejoice the birth of Jesus Christ. The Christmas chronicle comes from the Bible. An angel appeared to shepherd and told them that a Savior had been born to Mary and Joseph in a stable in Bethlehem. Three Judicious Men from the East (the Magi) followed a amazing star which led them to the baby Jesus to whom they paid homage and presented gifts of gold, frankincense and myrrh.
To people all over the earth, Christmas is a flavor of giving and receiving presents. In some European countries, priest Christmas, or Saint Nicholas, comes into houses in the night and leaves gifts for the children. Saint Nicholas is represented as a kindheartedly man with a red cloak and long white beard. Another nature, the Norse God Odin, ride on a mysterious flying horse across the sky in the winter to prize people with gifts. These different myths passed across the ages to make the present day Santa Claus.
On December 24, Christmas Eve, Santa hitches his eight reindeer to a toboggan and loads it with presents. The reindeer drag him and his sleigh through the sky to deliver presents to children all around the earth, that is, if they had been good all year. Several American towns maintain the strength of Santa Claus.
Santa Claus exists only in our imagination. But he, Saint Nicholas, and father Christmas are feelings of giving. Christmas has been associated with gift giving since the Wise Men brought gifts to welcome the newborn Jesus Christ.In eagerness of Santa's visit, American children pay attention to their parents read "The Night previous to Christmas" before they go to bed on Christmas Eve

Thursday, December 06, 2007

Uses of Ginger

There are array of uses suggested for ginger. A tea brewed from the is a folk medicine for colds. Ginger ale and ginger beer have been suggested as "stomach settlers" for generation in countries where the beverages are made and ginger water was commonly used to avoid heat cramps in the US. Ginger has also been historically used to take care of inflammation which some scientific studies support, though one arthritis trial showed ginger to be no better than a placebo or ibuprofen. Research on rats suggests that ginger may be valuable for treating diabetes.

Wednesday, November 28, 2007

The Banyan Tree

In India the Banyan Tree is consider as National tree. This huge tree overlooks over its neighbors and has the widest reaching roots of all known trees, easily covering several acres. It sends off new shoots from its roots, so that one tree is really a interweave of branches, roots, and trunks. The banyan tree restart and lives for an incredible length of time--thus it is thought of as the everlasting tree.

Its size and leafy shelter are valued in India as a place of relax and mirror image, not to mention defense from the hot sun! It is still the focus and gathering place for local councils and meetings. India has a long history of worship this tree; it figures importantly in many of the oldest stories of the nation.

Tuesday, November 20, 2007

Abraham Lincoln

The brave man of the familiar People. It had been an extended time coming. Terribly separated by the issue of slavery, thirty-one million American citizens were in 1860
Called upon to vote for 16th President of the United States. The Democratic Party meets at its National Party Convention in Charleston, South Carolina, in order to choose their candidate in favor of the presidency. Split over slavery, each section, Northern Democrats on the one hand and Southern Democrats on the other, presented its own conflicting proposal for the party platform.
In February 1860, Senator Jefferson Davis of Mississippi claimed that neither the Congress of the United States nor the territorial parliaments had the control to handle slavery.

Tuesday, November 13, 2007

Adam Smith

He was born in 1723 in Kirkcaldy, Fife, Scotland, fatherless. The accurate date of his birth is unidentified. He was baptized June 5, 1723. At the age of fifteen, he begins his school at Glasgow and Oxford. In 1751, after he finished school, he was obtained a job at Glasgow University where he became the new Professor of judgment. There he lectured on beliefs, expression, jurisprudence and the political economy.

Just eight years after his training career began; he published his work. The Theory of ethical Sentiments. This show that he could write and he recognized himself in the world. In 1776, a query into the Nature and Causes of the Wealth of Nations was published. Immediately the book was a success. It had a remarkable effect on how people attention. Although it took him ten years to write, he became a very rich man from it.

Wednesday, October 24, 2007

A Team Player

The superiority of being a team player is one that everyone should enjoy. A team player is someone with good qualities who makes contributions and has the force to motivate each one around him or her. This individuality can be used in many areas such as games, family life, and in the company. You are more expected to be hired in the production if you have and demonstrate the qualities of a team player. As the business climate gets tougher before it gets improved, it is time to hike the talk if you want to develop.

Managers will require all the cooperation they can get. To land a high paying job with a major business you need to be a team player. Having good qualities is one of the most significant characters you can have. Being a team performer thinks of the team as a whole and is not selfish in their views and decisions.