Seasonal phenology and damage by Singapora shinshana (Hemiptera: Cicadellidae) and other leafhoppers on ornamental trees in Korea

Kim Hyun‐guk,Kabir Md. Faisal,An Hyeon Jeong,Mwamula Abraham Okki,Oh Sumin,Jung Sunghoon,Lee Dong Woon 한국곤충학회 2021 Entomological Research Vol.51 No.9

Singapora shinshana is a leafhopper native to mid-Asia with a specific host range and is one of the least studied species within the genus. Recently, the species has been found to cause significant damage to host plants including ornamental trees, normally inflicted by its sucking behavior. This study uncovered more details on host and season preference of S. shinshana, damage potential and symptoms caused by its feeding behavior on ornamental trees in Korea, in addition to other records of other leafhoppers of economic importance. During the sticky trap survey period from 2017 to 2019, 12 leafhopper species were recovered from the eight selected ornamental tree species. Singapora shinshana was the most dominant species, constituting 94.8% of the total collected leafhopper population; with its highest incidence observed on Prunus serrulata, followed by Elaeagnus umbellata and Pseudocydonia sinensis. The high abundance on P. serrulata correlated with high damaged leaf percentages of 94.2%, 95.2%, and 98.1% in October 2017, 2018, and 2019, respectively. Interestingly, in terms of damaged leaf percentage, Rosa hybrida and Zelkova serrata were the second and third most damaged hosts despite the significantly lower population of the leafhopper on these trees. Furthermore, S. shinshana counts increased from late-July to late-September, with the peak evident during early August. Prunus serrulata can therefore be taken as one of the main host plants of S. shinshana. However, the potential of the host to suffer damage is not limited to population densities of the pest alone but also susceptibility and tolerance of the host plant.

고능력 젖소 축군의 집단번식관리프로그램 적용에 의한 번식효율의 개선

노경수,김의형,남현욱,서국현,강현구,김일화 충남대학교 형질전환복제돼지연구센터 2004 논문집 Vol. No.8

We investigated the effect of reproductive herd health program (RHHP) on the reproductive performance in high yielding dairy herds. Data collected from 205 lactations at Boeun County, Chungbuk from April 2001 to Dec. 2003 included postpartum reproductive and metabolic diseases, body condition score (BCS), reproductive performance and milking records. First we compared the reproductive performance of cows without RHHP (pre-RHHP group) and cows with RHHP (RHHP group). Intervals from calving to first service (99.6 vs. 81.8 days) and to conception (160.3 vs. 131.8 days) were shorter in the RHHP group than in the pre-RHHP group. Secondly, we determined the effect of milk yield (305 days) on the occurrence of postpartum diseases, BCS changes, and reproductive performance in cows under RHHP, The occurrence of metritis and metabolic diseases were greater in the over-10,000 kg group than in the under-l0,000 kg group. The over-10,000 kg group lost more body condition than the under-10,000 kg group from calving to month 3 postpartum. Nevertheless, reproductive performance did not differ between the two groups. These results indicate that reproductive performance can be improved by the application of RHHP in high yielding dairy herds and that reproductive performance in the cows under RHHP are not affected by high milk yielding.

動物에서 分離된 Candida tropicalis 및 Candida pseudotropicalis에 對한 基礎硏究

張國鉉 건국대학교 1990 論文集 Vol.30 No.1

The yeast- like-fungi were isolated from 4 animals and their biochemical properties and immunological reaction were investigated. 58 strains were identified as Candida tropicalis and 21 strains were Candida pseudotropicalis. In the test of an antimicrobial drug sensitivity Candida tropicalis were sensitive to nystatin(89.7%) and econazol(74.1%), whereas Candida pseudotropicalis were sensitive to nystatin(95.2%), econazol and miconazole(80 %).

독일문학에서의 서정시 개념의 변천에 대한 연구

최국현 淸州大學校 1984 論文集 Vol.17 No.1

Diese kleine Abhandlung zielt auf das Korrigieren des Glaubens an die Subjektivita¨t der Gattung Lyrik. Vor allem babe ich Bernhard Asmuths <Aspekte der Lyrik> beru¨cksichtigt. Um das verbleibende Material u¨berschaubar zu machen, bu¨rdele ich die Fu¨lle der thematischen Mo¨glichkeiten zu einigen nach Gegenstands-bzw. Interessenrichtung unterschiedenen Arten der Lyrik. Diese Arten sind nicht als Scharf voneinander abgrenzbaren Bereiche, sondern eher als Orientierungspunkte im F1uß der geschichtlichen Vera¨nderungen zu begreifen. Und die Reihenfolge ihrer Eesprechung dient dazu, die immer noch verbreitete Vorstellung von der monologisch gefu¨hlvollen Subjektivita¨t der Lyrik stufenweise zu korrigieren. Zuerst babe ich die Objektivita¨t der Lyrik in dem nachromantischen Objektivierungsversuche, na¨mlich, in dem Dinggedicht, in der absoluten Lyrik and konkreter Poesie beweist. Danach babe ich partnerbezcgene Arten der Lyrik als einen entscheidenden Eeweis fu¨r die Objektivita¨t der Lyrik dargestellt. Schließlich halve ich die Mo¨glichkeit, das Lied als eine Grundlage der lyrik darzustellen, u¨berpru¨ft.

「바다 이미지」를 통해 본 한국시의 상상력 연구 : 일제시대를 중심으로

강현국 대구교육대학교 1987 論文集 Vol.23 No.-

Double keyhhole loop에 의한 상악 6전치의 후방견인시 치아이동양상에 관한 측모두부방사선계측학적 연구

김현경,박영국 대한치과교정학회 2002 대한치과교정학회지 Vol.32 No.1

일반적으로 치조성 양악전돌증의 치료는 환자의 나이나 골격 부조화의 원인, 심도 등에 따라 다른데, 환자의 성장이 이미 완료되고 골격적 부조화의 정도가 심하지 않은 경우에는 치아의 이동만으로 문제를 해소하는 교정적인 절충치료를 행하게 되며 심미성의 증진을 위해서는 소구치, 특히 제1소구치 발치가 적절한 선택일 수 있다. 제1소구치의 발치 후 전치부의 En Masse 견인시 이용되고 있는 double keyhole loop(이하 DKHL로 약함)에는 4개의 루프가 있어 발치 공간 폐쇄시 견치 치관의 원심경사를 조절하고 구치 치관이 근심측으로 경사되는 것을 막아 교합평면의 굴곡을 방지하는 효과가 있는 한편 견치의 회전을 조절할 수 있도록 설계되어 있다. 이 연구는 Ⅰ급 치조성 양악전돌증 Ⅱ급 1류 부정교합이 있는 성인환자를 대상으로 상, 하악 6전치를 후방이동시킴으로써 연조직의 변화를 가져와 심미적으로 좋은 치료의 결과를 얻기 위해 상악 제1소구치를 발거하여 DKHL에 의해 치료가 완료된 환자의 측모두부방사선사진에서 치료 전, 후의 골격적인 변화와 치아치조영역의 변화를 알아보기 위해 시행되었고, 다음의 결론을 얻었다. 1. DKHL에 의한 치료 전, 후의 골격적인 변화는 SNB의 감고경향(0.49 ± 0.87°, p<0.05)과 PTFH의 증가경향(0.50 ± 0.8 ㎜, p<0.05)을 제외하고는 통계적으로 유의한 변화를 나타내지 않았고 주된 변화는 치아치조영역에서 일어났다. 2. 치료 후 치아치조영역에서는 절치간각을 제외한 모든 계측항목에서 통계적으로 유의할 만한 감소를 보였다. 3. 상하순의 돌출도 모두 유의성 있는 감소를 나타내었다. 4. 상악 전치의 치관은 통계적으로 유의할 만한 후방이동(7.08 ± 2.14 ㎜, p<0.01)을 보였고, 상악 전치의 치근에서는 통계적으로 유의할 만한 수직고경의 감소(2.38 ± 1.15 ㎜, p<0.01)를 보였다. 5. 상악 구치의 치관, 치근 모두에서 통계적으로 유의할 만한 전방이동(2.48 ± 0.99 ㎜, 2.05 ± 0.91 ㎜, p<0.01)을 보였다. The present study hypothesized that the double keyhole looped archwire plays a positive role for the sake of translatory movement and/or controlled tipping of upper 6 anteriors, and secures anchorage control as well. The purposes of the study were to evaluate the changes in lateral cephalograms during orthodontic treatment with DKHLs and to compare the skeletal & dental changes before- & after-treatment. The materials of this study were lateral cephalograms of 20 adult patients with upper dentoalveolar protrusion both in class Ⅰ and in Ⅱ Division 1 malocclusion. Lateral cephalograms were taken before and after orthodontic treatment with upper 1st bicuspid extraction and DKHLs. The results were obtained as follows : 1. There were no statistically significant differences in skeletal measurement except SNB and PTFH between before- & after-treatment. The major changes were in dentoalveolar region. 2. After treatment, there were statistically significant decrease in dental measurement except interincisal angle. 3. Both upper & lower lip protrusion was decreased. 4. There were statistically differences in upper anterior crown horizontal & root vertical dimension(7.08 ± 2.14 ㎜, 2.38 ± 1.15 ㎜, p<0.01). 5. There were statistically differences in upper posterior dental(both crown & root) horizontal dimension(2.48 ± 0.99 ㎜, 2.05 ± 0.91 ㎜, p<0.01).

한국 현대시의 한 흐름 : 은유에서 환유로 From Metaphor Towards Metonymy

강현국 대구교육대학교 2002 論文集 Vol.37 No.-

힐버트 공간 채움 곡선을 이용한 공간 질의 결과 크기 추정

김현국,황환규 강원대학교 정보통신연구소 2003 정보통신논문지 Vol.7 No.-

Spatial query processing in large spatial databases costs very much. Therefore the query result size estimation is required to reduce the cost for the optimized query plan. To this end, we estimate the query result size from the summary data which is obtained by approximating the distribution and characteristics of the spatial data. new spatial partitioning technique based on the Hilbert space filling curve combined with the Equi-Count In this paper, we examine the several existing spatial partitioning techniques such as Equi-Area and Equi-Count partitioning, and R-tree indexing partitioning. We propose apartitioning technique. A variety of experiments demonstarate that the proposed partitioning technique is superior to the existing ones.

수직적 분류에 의한 골격성 Ⅲ급 부정교합자의 측모 특성에 관한 연구

이현경,박영국,정규림 대한치과교정학회 1992 대한치과교정학회지 Vol.22 No.1

This study was aimed to investigate the characteristics & the causative areas of the adult skeletal class Ⅲ malocclusions with different facial divergency. The lateral cephalograms of 80 subjects with skeletal class Ⅲ malocclusion from 17 to 29 years of age were classified into 3 groups according to SN-MP angle; hypodivergent group(21.65 ± 3.52。), neutrodivergent group(30.50 ± 2.29。) and hyperdivergent group(40.02 ± 3.98。). The data were gathered by digitizing of the traced cephalograms and were statistically analyzed. The results were as follows: 1. The anterior cranial base of the hyperdivergent group was shortest & tipped upwardly to the FH plane. 2. The maxilla of hyperdivergent group was shortest anteroposteriorly and positioned posteriorly to the anterior cranial base. 3. The degree of the mandibular prognathism in hyperdivergent group was less than the hypodivergent group. The hyperdivergent group showed the downward & backward rotated mandible. 4. The mandibular ramus & body was short & slender in the hyperdivergent group and the gonial angle was greatest in the hyperdivergent group. 5. The temporomandibular joint was positioned more superiorly to the anterior cranial base in the hyperdivergent group. 6. The cranial base, palatal plane, occlusal plane and mandibular plane were diverged in the hyperdivergent group. And this group had a great anterior total facial height, especially anterior lower facial height. 7. The craniofacial characteristics of skeletal class Ⅲ malocclusion were critical in the vertical structure than the horizontal.

북한의 서정시 연구

강현국 大邱敎育大學校 1993 論文集 Vol.28 No.-

일반적으로 우리는 어떤 대상을 있는대로 볼때 그 참뜻을 찾을 수 있다고 생각한다. 그러나 경우에 따라서는 어떤 대상의 참뜻이 보는대로 있기를 희망하거나 보는대로 있으리라 믿고 싶을때가 있다. 한반도의 한쪽에서 유통되고 있는 이른바 북한의 서정시를 읽는 내 마음이그랬다. 이처럼 다분히 주관적이고 감정적인 태도를 취하고 싶은 데에는 몇가지 이유가 있다. 그것은 첫째, 북한시의 판에 박힌 상투성과 간단없는 낙후성 때문이다. 북한시의 작은 갈래들인 송시, 정론시, 풍자시, 서사시, 담시, 가요 등 모든 작품들은 몇가지 유형으로 규격화되고 마침내 당과 수령으로 귀결되는 상투성을 보인다. 또한 북한시의 문화적 수준은 우리의 문화감각으로 볼때 창가와 신시의 수중을 웃돌지 못하는 실정이다. 사정이 이와 같아서 북한시를 있는대로 읽기란 여간 따분하지 않고 그 결과 또한 그게 그것일 터이다. 둘째, 북한시의 실상에대한 객관적인 검토는 몇몇 학자들에 의해 덧보탬이 필요없을 만큼 이루어져 더 이상 할 말이 없기 때문이다.