The purpose of this study is to observe the effect of elasticity of taping on ankle muscles’activity and endurance after plyometric training that easily causes ankle injury, and provide baseline data for physical therapy intervention methods. The study subjects are 24 male students in their 20s who attend N University in Choongnam. They were divided into three groups; 8 subjects in the elastic taping group, 8 in the non-elastic taping group, and 8 in the non-taping group(control group). They had plyometric training for 6 weeks. After the training, this study measured their maximum voluntary isometric contraction(MVIC) and muscle endurance of the muscles around ankle joint. The experiment result is as follows. After the training, all three groups showed improvement in muscle strength and endurance. The elastic taping group showed insignificant improvement in muscle strength but significant increase in muscle endurance in plantarflexion. In dorsiflexion, both muscle strength and endurance increased significantly. The non-elastic taping group showed insignificant improvement in muscle strength but significant increase in muscle endurance in plantarflexion. Taping during plyometric training had a little or insignificant effect on muscle endurance and strength compared to the non-taping group.

Recently there are increasing numbers of people participating in sports activities. Accordingly, the rate of sports injuries is increasing as well. In this light, this study was conducted to investigate the extent of acute damage and its forms by examining the current state of patients with sports injuries. This research study was conducted between January of 2008 and December of 2010 in Chosun University Hospital through retrospective review of the medical records of patients with sportsrelated injuries. The total number of patients with sports injuries who visited the emergency center was 887. The number of male patients was 726 (81.85%), far more than the number of female patients (18.15%). More than half of the patients, accounting for 419 (47.23%), had injuries on their face; second and common parts, in which injuries occurred, were upper and lower body, accounting for 146 (16.45%) and 193 (21.75%), respectively. The majority of patients did not undergo surgical treatment. Only 113 (12.73%) patients underwent surgical treatment. In addition, more than 80% of them were not hospitalized but 170 of them needed to be hospitalized. Most sports injuries occurred in young male patients. This can interrupt participation in sports activities for a long time and result in lower quality of life. Hence proper preventative measures and scientific treatment methods are needed.

"Chugang" as a new double cropping potato variety for table use was bred in 2003 from a cross between H83005-2 with short dormancy and "Superior" with common scab resistance. It had been evaluated for short dormancy, growth adaptability and tuber characteristics every twice a year from 1990 to 1999. Regional yield trials had been performed from 2000 to 2002 at three locations, Jeju, Namhae and Gangneung of Korea, respectively. It has round oblong tuber shape with yellow skin and white flesh color. Its tuber dormant periods is approximately 50~60 days. It showed less physiological disorders such as cracking or knobs, and more tolerant to environmental stresses such as plant death by flooding and damages by frost or severe wind compared to "Dejima". Average yields of "Chugang" are 34.6 and 31.1 ton/ha at 90 days after planting in spring and autumn cropping, respectively. It is more resistant to common scab and less susceptible to late blight (phythophthora infestans) compared to "Dejima". However, it is susceptible to potato virus Y (PVY) and andean mosaic virus (AMV).

Lately, the autumn cropping areas of potato have been steadily increased to supply fresh potatoes all year round in Korea. Although "Dejima" is a main cultivar for autumn cropping, it is very susceptible to common scab (Streptomyces scabies) and show high frequency of physiological disorders such as knobs and cracking on tubers. "Chudong" was bred in 2002 for fresh table use from a cross between H83520-3 with short tuber dormancy and "Superior" with common scab resistance. It has attractive, round tuber shape with white skin and flesh colors. Its tuber dormant periods is 5 days longer than 65 days of "Dejima". Its average yields were 32.4 and 21.8 ton/ha at 90 days after planting in spring and autumn cropping of regional yield trials, respectively. It is more resistant to common scab and potato leaf roll virus and less susceptible to late blight (Phythophthora infestans) compared to "Dejima". However, it is susceptible to potato virus Y.

This study was conducted to clarify the relation of the species of genus Sorbus in Korea based on multivariate analysis for the morphological characteristics and DNA polymorphism. Twenty-eight quantitative characters were assessed and analyzed by the principal component analysis and UPGMA cluster analysis. From the principal component analysis of 28 quantitative characters, three principal components (PC’s) explained the variation of inter-specific relations among the genus Sorbus. The first PC’s explained 58.95% of the variation with the Eigenvalue of 16.5, and the second and third PC’s showed the Eigenvalue of 8.3 and 3.1 and explained 88.74% and 100.0% of the variation, respectively. Especially, the first PC’s was related in order of the fruit width (FW) and length of terminal leaflet (LTL), petal length (PL), width of terminal leaflet (WTL), and diameter of winter bud (DWB). The second and third PC’s were involved in order of the No. of leaflet (NL), No. of fruit per fruiting lateral (NFL), length of upper rachis (LUR), and diameter of rachis (DR), No. of pistil (NP), respectively. Cluster analysis using them UPGMA method based on the principal components of four species of the genus Sorbus divided into two groups. Group Ⅰ comprises Sorbus commixta and S. sambucifolia var. pseudogracilis, and Group Ⅱ consists of S. amurensis and S. aucuparia. The pattern of DNA polymorphism of the 56 inter-simple sequence repeat (ISSR) markers revealed that different taxa shared different sets of bands, and DNA analysis is useful for taxonomic study on the genus Sorbus.