In this study, compatible taper and stem volume equations were developed for Larix kaempferi species of South Korea. The dataset was split into two groups： 80% of the data were used in model fitting and the remaining...In this study, compatible taper and stem volume equations were developed for Larix kaempferi species of South Korea. The dataset was split into two groups： 80% of the data were used in model fitting and the remaining 2o% were used for validation. The compatible MB76 equations were used to predict the diameter outside bark to a specific height, the height to a specific diameter and the stem volume of the species. The result of the stem volume analysis was compared with the existing stem volume model of Larix kaempferi species of South Korea which was developed by the Korea Forest Research Institute and with a simple volume model that was developed with fitting dataset in this study. The compatible model provided accurate prediction of the total stem volume when compared to the existing stem volume model and with a simple volume model. It is concluded that the compatible taper and stem volume equations are more convenient to use and therefore it is recommended to be applied in the Larix kaempferi species of South Korea.展开更多
BACKGROUND Imperforate hymen is a rare obstructive anomaly of the female reproductive tract.It is associated with complications,such as cyclical abdominal pain,urinary retention,and pelvic mass.CASE SUMMARY A 13-year-...BACKGROUND Imperforate hymen is a rare obstructive anomaly of the female reproductive tract.It is associated with complications,such as cyclical abdominal pain,urinary retention,and pelvic mass.CASE SUMMARY A 13-year-old girl presented several times to the emergency room with lower abdominal pain for a year.She received conservative treatment,such as pain control,at each visit.She visited our gynecological clinic for worsening pain,and a 14-cm hematocolpos was found on ultrasonography.She was finally diagnosed with an imperforate hymen with hematocolpometra.Hymenectomy was performed,which resulted in event-free regular cyclical menstruation.CONCLUSION Imperforate hymen should be considered in a premenarcheal adolescent girl with periodic abdominal pain.展开更多
基金the Korea Forest Service for funding this research(Project No.S211316L020130)
文摘In this study, compatible taper and stem volume equations were developed for Larix kaempferi species of South Korea. The dataset was split into two groups： 80% of the data were used in model fitting and the remaining 2o% were used for validation. The compatible MB76 equations were used to predict the diameter outside bark to a specific height, the height to a specific diameter and the stem volume of the species. The result of the stem volume analysis was compared with the existing stem volume model of Larix kaempferi species of South Korea which was developed by the Korea Forest Research Institute and with a simple volume model that was developed with fitting dataset in this study. The compatible model provided accurate prediction of the total stem volume when compared to the existing stem volume model and with a simple volume model. It is concluded that the compatible taper and stem volume equations are more convenient to use and therefore it is recommended to be applied in the Larix kaempferi species of South Korea.
文摘BACKGROUND Imperforate hymen is a rare obstructive anomaly of the female reproductive tract.It is associated with complications,such as cyclical abdominal pain,urinary retention,and pelvic mass.CASE SUMMARY A 13-year-old girl presented several times to the emergency room with lower abdominal pain for a year.She received conservative treatment,such as pain control,at each visit.She visited our gynecological clinic for worsening pain,and a 14-cm hematocolpos was found on ultrasonography.She was finally diagnosed with an imperforate hymen with hematocolpometra.Hymenectomy was performed,which resulted in event-free regular cyclical menstruation.CONCLUSION Imperforate hymen should be considered in a premenarcheal adolescent girl with periodic abdominal pain.
