The Korean terms hyeong, pumsae, poomsae and teul (meaning "form" or "pattern") are all used to refer to martial arts forms that are typically used in Korean martial arts such as Taekwondo and Tang Soo Do. Hyeong is often romanized as hyung. This term is used primarily in earlier styles of taekwondo, often referred to as traditional taekwondo. Pumsae is often romanized as poomsae or poomse. This term is used primarily in Kukkiwon/WTF-style taekwondo. Teul is often romanized as tul. This term is used primarily in ITF-style taekwondo. A hyeong is a systematic, prearranged sequence of martial techniques that is performed either with or without the use of a weapon. In traditional dojangs (training halls), hyeong are used primarily as a form of interval training that is useful in developing mushin, proper kinetics and mental and physical fortitude. Hyeong may resemble combat, but are artistically non-combative and woven together so as to be an effective conditioning tool. One's aptitude for a particular hyeong may be evaluated in competition. In such competitions, hyeong are evaluated by a panel of judges who base the score on many factors including energy, precision, speed, and control. In western competitions, there are two general classes of hyeong: creative and standard. Creative hyeong are created by the performer and are generally more acrobatic in nature and do not necessarily reflect the kinetic principles intrinsic in any martial system. Beginning in 1946, shortly after the conclusion of the Japanese occupation of Korea, new martial arts schools called kwans were opened in Seoul. These schools were established by Korean martial artists who had studied primarily in Okinawa and China during the Japanese occupation. Accordingly, the martial arts practiced in the kwans was heavily influenced by shotokan karate and Chinese martial arts, though elements of taekkyeon and gwonbeop were also incorporated. Five of these kwans were established during the interval between World War II and the Korean War.