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A study on some variations of the k-d tree and BD tree for logical gates
Hah, ki jong,Choi, young gyu,Yi, cheon hee 청주대학교 산업과학연구소 1993 産業科學硏究 Vol.11 No.-
In this paper, a simple modification to the basic k-d tree structure is suggested to improve its performance for certain types of queries at the expense of slightly increased storage cost. Also present are some experimental results that compare the perfomance of the standard k-d tree and the modified k-d tree The k-d tree is one such example and it is a natural generalization of the standard one-dimensional binary search tree. Recently, a new storage structure, called the BD tree[1], was proposed to manage multidimensional data This structure has good dynamic characteristics, several variations are possible on the basic k-d tree structure This paper studies the performance implications of some variations. Further, it provides an empirical performance comparison of the k-d tree and BD tree in database applications.
Assessment of pesticides efficacy against the nymph of Citrus flatid planthopper, Metcalfa pruinosa
Ki-Su Ahn,Jong-Woo Han,Sun Kook Kim,Ik-Jei Kim,Gil-Hah Kim 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.04
Eighty kinds of pesticides registered in the peach and leaf perilla were assessed the efficacy against the 4th nymph stage of citrus flatid planthopper. Plant of Sharon, host plant preferred by citrus flatid planthopper, was cut from 5 to 7 cm and dipped 10 seconds into recommended concentrations of pesticides, respectively, and then dried naturally for the 30 minutes. New shoot of Plant of sharon treated pesticides and 10 to 15 final nymphs of citrus flatid planthopper put together in the 50㎖ tube and the number of live nymphs was investigated after 48 hours. Pesticides showing mortality over 90% were seven, namely, bifenthrin EW, Rhamda-cyhalothrin EC, Clothianidin SC, Benfuracarb SG, Chloropyrifos WP, Bifenthrin+methoxypenozide SC, Chloropyrifos+imidacloprid WP. When the forest surrounding the peach and leaf perilla was occurred and damaged by citrus flatid planthopper, the use of these pesticides is judged to be effective in the control of this pest.
Control strategies using EFAM and natural enemy when cultivating autumn-type leaf Perilla
Ki-Su Ahn,Jong-Woo Han,Sun Kook Kim,Ik-Jei Kim,Gil-Hah Kim 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.04
This study was performed to establish the control strategies effectively using Eco-friendly agricultural materials (EFAM) and natural enemy when cultivating autumn-type leaf perilla and to investigate the population densities of seasonal major pests such as Tetranychus urticae (two-spotted spider mite, TSSM), Broad mite (Polyphagotarsonemus latus), Aphis egomae, and Pyrausta panopealis. TSSM showed the occurrence in the seedling stage from August to the end of September and controlled using EFAM in the nursery. Broad mites had a low occurrence in October, December, and the following year showed the density of two or more leaves per leaf from February. Aphis egomae was locally prevented around the area of occurrence, and it showed more than five per leaf in October. Pyrausta panopealis seemed to occur from August to September. Aphis egomae is control using high-toxic EFAM before the overwintering and prevents it from using banker plants planted barley in the winter. Pyrausta panopealis is protected by biological pesticides in August registered in the leaf perilla.
Methotrexate의 국소적ㆍ전신적 요법으로 치유한 자궁경관임신
허의종(Eui Jong Hur),박진완(Jin Wan Park),이원기(Won Ki Lee),하진완(Jin Wan Hah) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.12
Cervical pregnancy is a rare form of ectopic pregnancy and it can cause life-threatening bleeding. Until recently abdominal hysterectomy has been considered the standard therapy for fear of profuse hemorrhage. Methotrexate, however, can be useful agent to conserve further fertility and it is used in various routes of administration. We report a case of cervical pregnancy that was successfully treated by intraamniotic methotrexate injection under the guidance of transvaginal ultrasonography and subsequent four systemic doses thereafter.
Control System of Metcalfa pruinosa in the Sesame Fields
Se-Gu Hwang,Ki-Su Ahn,Jong-Woo Han,Yu-Hui Kim,Sun-Hee Kang,Young-Ho Kim,Gil-Hah Kim 한국응용곤충학회 2019 한국응용곤충학회 학술대회논문집 Vol.2019 No.04
For the setting of control timing, the number of overwintering eggs on host plants and population density of Metcalfa pruinosa nymphs and adults was surveyed in a sesame fields. According to a survey of the overwintering eggs density of M. pruinosa on host plants, they were many in the order of Mugunghwa trees, Oak trees, and Acacia trees. Examined sesame branches within the 50cm was not found population densities of M. pruinosa nymphs and adults, and it was also very low in the sticky trap. The peak density of the adult was highest at 0.13 per trap on 11 after being first investigated on July 3 in a string wrap survey, and then decreased. In a sesame fields, it is judged that the control of the M. pruinosa is due to be 35 days after the end of the insect hatching, and that distribution of host plants is more important in the outside region than inside region.