Composite particles are subatomic particles that are made of more than one quark. Simple particles like protons are actually composites of multiple quarks. Protons are known as baryons, which means that they are made of exactly three quarks. Baryons are in a family called Hadrons, which simply means that they are made of quarks. The only other subcategory of Hadrons is Mesons, which are made of one quark and one antiquark.
Since they are made of quarks, composite particles are not so much hard balls, but rather like clouds that contain these quarks. Depending on the energy contained by the quarks, the quarks of a proton vibrate, and this gives a proton a size larger than the actual size of the three quarks combined.
For more information see: , , and the composite particles on the wiki pages.
Clostridium perfringens
Clostridium perfringens is a gram-positive bacterium of the genus "Clostridium". "C. perfringens" is ubiquitous in nature and can be found as a normal component of decaying vegetation, marine sediment, the intestinal tract of humans and other vertebrates, insects, and soil. "C. perfringens" is a human pathogen sometimes, and other times it can be ingested and not cause any harm.
TOEFL
The Test of English as a Foreign Language, or TOEFL, is a test which measures people’s English language skills to see if they are good enough to take a course at university or graduate school in English-speaking countries. It is for people whose native language is not English but wish to study in an international University. It measures how well a person uses listening, reading, speaking and writing skills to perform academic tasks. This test is accepted by more than 10 000 colleges, universities, and agencies in more than 150 countries; which means it is the most widely recognized English test in the world.
The format of the TOEFL test has been changed three times. The first was the PBT (paper-based TOEFL test). It tests listening, reading and grammar skills with a perfect score being 677 (Paper Based). Some centers where computers are not available still offer this format. The second format is the CBT (computer-based TOEFL test). People are each provided with a computer to take the test. A writing section was added as well as the three sections. The level of listening and grammar skills are automatically changed depending on a person’s English level. The third change is the iBT (Internet-based test) that is being brought in around the world which measures listening, speaking, reading and writing.
There are three procedures that people are following to take the test. First it is decided where and when you are going to
take the test because the format of the test could be either iBT or CBT depending on location. People need to register 2–3 months in advance to get a place. Second is registration in person, online, by phone, or through email. Online registration is most common and payment will be required to complete the registration. The cost changes depending on what kind of exam is taken.
As more universities and colleges want a TOEFL more people are wanting to do the test. In Korea in 2010, nearly 115,000 people took the test to demonstrate their ability in English. This was 20% of the total for people doing the test. It is considered as one of the ways for middle or high school students to apply for the high ranked domestic universities. By studying at such an advanced level, it could help to improve their English skills to get high scores in other English exams..
Point guard
Point guard is a position in basketball. It is one of the most important positions. A point guard should maintain his team's offense by controlling the ball safely and pass the ball to the right teammate at the right time. Because of his role in the play, a point guard is usually called a commander on the court. Steve Nash, Chris Paul, Stephen Curry and John Stockton are famous point guard in the NBA.
First of all, right pass is the most important requirement to be a good point guard. A point guard's first thought should be being an excellent passer and getting the ball to his teammates for easy shots. Because the offense is usually started from a point guard who handles the ball, he should be able to find the open man, and when to pass and not pass to avoid costly turnovers and score easily.
Second, safe dribbling and ball handling are necessary. Before a point guard passes the ball to his teammates, he should carry the ball from back court to front court. To carry the ball safely without turnovers, it is important to know how to control the ball safely. And by controlling the ball safely, a point guard also can control the tempo of the game. The ability, controlling the tempo, make a point guard choose right way to offense, a fast-break or a slow-attack. Through choosing right strategy, a point guard can make chance at the right time and also save his teammate's stamina effectively.
Third, a point guard is a coach on the court. To command proper strategy to his teammates, a point guard should understand all strategies which are commanded by his coach. This ability may help a point guard to play the game well with the right strategy at right time.
Lastly, a point guard should be a good shooter. Sometimes the game can be unfavorable, even a point guard pass well and play the game with right strategy. At this time his accurate shooting can be an escapeway from this situation. By announcing his ability to shooting accurately, a point guard can plant an awareness to opponents that they should defense him well. And it cause the decreasing of pressure to other teammates to offense. Like this, a point guard's shooting ability can be the option to offense effectively.
Han River
The Han River is a major river in South Korea and the fourth longest river in the Korean Peninsula. Shortly after flowing through Seoul the rover merges with the Imjin River and flows into the Yellow Sea. The total length of this river is about 514km. The Han River played an important role in Korean History. However, it is no longer actively used for navigation because it is located at the borders of the two Koreas.
The Han River originates from two rivers, the Namhan River and the Bukhan River, and it is called the Han River from which two rivers joins. The Han River is about 514 kilometers long (the fourth longest river on the Korean peninsula) and stretches over one kilometer at its broadest point. 27 bridges cross the river, connecting the north and south part of Seoul. The riverbank area is used as parks and sports facilities.
In Korean history, Han river played a central role. The rise and fall of the nation depended on taking the Han river. Especially in three kingdom period, there were fierce struggles to take the Han river. Baekje was the first to take the Han river. They recognized it as a primary waterway that links the central western region of the peninsula with the Yellow Sea. The kingdom of Goguryeo took the Han river during the reign of its King Jangsu. In 553, Silla broke its alliance with Baekje and took the control of the entire river.
Han River has been called by different names during the period of the three kingdom period. The state of Goguryeo called it the Arisu, Baekje called it the Ugniha, while the kingdom of Silla termed it the Iha.
There are 27 Bridges crossing the Han River in Seoul National Capital Area(Seoul, Gyeonggi, Incheon). The names of them are Ilsan Bridge, Gimpo Bridge, Haengju Bridge, Banghwa Bridge, Gayang Bridge, Seongsan Bridge, Yanghwa Bridge, Dangsan Railway Bridge, Seogang Bridge, Mapo Bridge, Wonhyo Bridge, Hangang Railway Bridge, Hangang Bridge, Dongjak Bridge, Banpo Bridge with Jamsu Bridge, Hannam Bridge, Dongho Bridge, Seongsu Bridge, Yeongdong Bridge, Cheongdam Bridge, Jamsil Bridge, Jamsil Railway Bridge, Olympic Bridge, Cheonho Bridge, Gwangjin Bridge, Gangdong Bridge, Paldang Bridge.