• Journal of the Korean association of regional geographers
• /
• v.3 no.1
• /
• pp.13-34
• /
• 1997

The impact of a central place on daily living over wide outlying territory has been one of traditional subjects in the field of urban geography. The flow of rural population toward the central city of Chinju characterizes the population movement in Western Kyungnam, where the spillover of urban population into outlying areas, an especially prominent phenomenon in American society, does not occur. The central city of Chinju is supposed to be the most favored settlement area in Western Kyungnam. More than two thousands of teachers. who live in Chinju, cross the city boundary each morning to do their jobs in Western Kyungnam. But only ninety teachers living outside Chinju commute to the workplace in the city. The teachers willingly spend hours commuting each day to enjoy better quality of life in the central city. In fact, the central city of Chinju functions as bedroom communities for many middle-class workers in Western Kyungnam. On the basis of teachers' commuting behavior, four levels of Chinju's urban spheres are identified in Western Kyungnam. As Table-6 and Figure-2 show, the first-order level of Chinju's sphere includes most Myuns of Sanchung/Hadong Guns and some Myuns of Sachun/Gosung Guns. The second-order level comprises Sanchung/Sachun Eubs and many Myuns of Sachun /Gosung Guns. The third-order level is made up of Samchunpo, Hadong/Gosung/Eryung/Namhae/Habchun/Hamyang Eups, and many Myuns of Eryung/Namhae/Habchun Guns. And all of Guchang Gun and most Myuns of Hamyang Gun belong to the fourth-order level of Chinju's sphere. The influence sphere of Metropolitan Chinju is extended farther in the direction of less competition with other metropolises. Such a situation occurs to the west and south of Chinju. Daily commuting, defined as the journeys to and from work, is an excellent indicator for delimiting urban spheres of influence.

• 한국정보교육학회:학술대회논문집
• /
• 2011.01a
• /
• pp.75-82
• /
• 2011

Addiction to online games has been causing many problems for elementary school students such as school life, humanity, scholarship and physique. Considering the increase in children being addicted to internet games, there are growing needs for attention and countermeasures toward the children. Nevertheless, it leaves something to be desired. Especially, studies and counterplans for the children who live in the metropolitan are not suited with the circumstances of each regional child. Therefore, it's necessary to work out new research by regional student groups. That is why this study understands fundamental facts about the usage of the internet of elementary school students living in Geoje, Gyeongnam and figures out the effects of online game addiction on the formation of character. Also, it suggests the right direction of internet use to parents and teachers, as rousing the public interest about computer game addiction.

• Asian-Australasian Journal of Animal Sciences
• /
• v.26 no.12
• /
• pp.1781-1789
• /
• 2013

Many studies have been carried out with respect to packaging methods and temperature conditions of beef. However, the effects of packaging methods and temperature conditions on the quality characteristics have not been extensively studied in low-grade beef. Low-grade beef samples were divided into 3 groups (C: ziplock bag packaging, T1: vacuum packaging, and T2: modified atmosphere packaging (MAP), $CO_2/N_2$ = 3:7) and samples were stored at $4^{\circ}C$ for 21 days. The water-holding capacity (WHC) was significantly lower in T1 than in the other samples up to 14 days of storage. The thiobarbituric acid reactive substances and volatile basic nitrogen values were significantly lower in T1 and T2 than in C after 7 to 14 days of storage. The total bacterial counts were significantly lower in T1 and T2 than in C after 14 days of storage. In a sensory evaluation, tenderness and overall acceptability were significantly higher in T1 and T2 than in C at the end of the storage period (21 days). We propose that the MAP method can improve beef quality characteristics of low-grade beef during cold storage. However, the beneficial effects did not outweigh the cost increase to implement MAP.

• Journal of the Korean earth science society
• /
• v.39 no.5
• /
• pp.458-472
• /
• 2018

Pterosaur tracks were discovered recently in the Daegok-ri dinosaur tracksite (Ulsan Metropolitan City Cultural Properties No. 13), Ulju-gun, Ulsan. Those tracks were reported as being the first in the Cretaceous deposits of Ulsan area. This tracksite is located relatively far from the Gyeongsangnam-do coastal area where pterosaur tracks were reported intensively, and there are stratigraphic differences. This study described the pterosaur tracks and trackway of the Daegok-ri tracksite and discussed the spatio-temporal distribution of the Cretaceous pterosaurs in the Korean Peninsula. The pterosaur footprints founded in Daegok-ri can be classified as Pteraichnus ichnosp., followed by the morphological characteristics. Based on the distribution of the pterosaur tracks on the Korean Peninsula including the Daegok-ri pterosaur tracks, it was estimated that the Cretaceous pterosaurs on the Korean Peninsula had survived approximately for 40 million years from 120 Ma (i.e., Early Cretaceous) to 80 Ma (i.e., Late Cretaceous) and inhabited in various sedimentary environments regardless of the basin size and the specific sedimentary environments. Furthermore, the occurrence of the sauropod, ornithopod, theropod, pterosaurs, birds, and crocodyliforms tracks/trackways in the Daegok-ri area represented that the Cretaceous vertebrate ichnodiversity was fairly high.