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Haewon Shin,Jae Chun Choe,Gilsang Jeong 한국응용곤충학회 2012 한국응용곤충학회 학술대회논문집 Vol.2012 No.05
Vollenhovia emeryi ant is distinguished by its wing morphology; short winged (SW) and long winged (LW). Its reproduction shows a bizarre genetic caste system distinct from other social hymenopteran insects. Unfertilized eggs undergo genome duplication and develop into clonal gynes. Fertilized eggs develop either into workers or males. The fate of the fertilized eggs is determined whether maternal genome loss (MGL) takes place after fertilization. Eggs with MGL become haploid males with only paternal half of the genome. Without MGL, the eggs become workers with maternal and paternal half of the genome. In this research, we analysed 5 nuclear genes of SW and LW individual ants. Among them, two genes from an SW male are identical to those of LW, and one gene from the SW male seems a variant of LW. The result indicates that SW males are derived from LW colonies. From the genetic relatedness point of view individuals in the same castes are genetically identical. On the other hand, between workers and two reproductives, the relatedness is asymmetrical and there is even no gene sharing between gynes and males. The conventional genetic relatedness by Hamilton is revised under this condition.
Wolbachia infection polymorphism and wing morphology in Vollenhovia emeryi chosenica (Wheeler)
Haewon Shin,Jaeri Yoo,Pureum Noh,Jae Chun Choe,Gilsang Jeong 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.10
Vollenhovia emeryi chosenica (Wheeler) (Hymenoptera: Myrmicinae) is an ant species frequently found in forests. In nature, two phenotypically distinct forms are found e.g. long winged and short winged. Unlike other hymenopteran insects, the ant is unique in its mode of reproduction. In this species, queens are clonally reproduced from unfertilized eggs. On the other hand, workers develop from fertilized eggs. Strikingly, haploid males are reproduced from fertilized eggs after destroying the maternal half of the genome e.g. maternal genome loss (MGL) consequently only with the paternal half of the genome. We collected the ant colonies nationwide in 2011. In this study, we demonstrate that the ant is infected with Wolbachia, the bacterial reproductive manipulator in various insects. Interestingly, only the long winged morphs seem to be infected. Furthermore, most colonies are mulitple-infected except two colonies collected from Chuncheon and Mt. Deogyu. We will discuss potential interactions among the Wolbachia infection polymorphism and wing morphology, and evolution of clonal reproduction and MGL.
SOA와 CBD를 이용한 웹서비스 시스템 설계 및 구현
신혜원(Haewon Shin),윤수진(Soojin Yun) 한국정보과학회 2004 한국정보과학회 학술발표논문집 Vol.31 No.2Ⅱ
시스템의 요구사항이 복잡해 짐에 따라, 분산 환경의 시스템 간에 일부 기능 모듈을 컴포넌트로 개발하여 공유하는 형태로 시스템이 발전하고 있다. 그러나 컴포넌트는 특정 기술에 종속적이면서 상대적으로 연관도가 높아 동일한 환경에서의 재사용성은 뛰어나지만, 플랫폼과 구현 언어에 의존성이 강하여 상호운용의 문제가 발생한다. 이를 보완하기 위한 아키텍처 중 하나인 SOA는 구현 기술로부터의 독립성 및 유연성(Flexibility)이 높아 이기종 시스템간 통합 구축에 적합하다. 본 논문에서는 컴포넌트의 상호운용 능력을 높이기 위한 방안으로 SOA와 CBD를 이용한 웹서비스 (Web Services)모델을 제안하였다. 또한 기존 어플리케이션에 존재하는 컴포넌트를 래핑(Wrapping) 하여 재사용 가능한 서비스를 생성하여 제공하고, 이기종 환경에서 재사용하는 구현 사례를 제시함으로써 높은 상호운용 능력이 있음을 보였다.
기업 페이스북에서 마케터의 자기노출과 이용자의 관여도 효과
신해원(Shin, Haewon),최인호(Choi, Inho),염정윤(Yum, Jung Yoon),정세훈(Jeong, Se-Hoon) 사이버커뮤니케이션학회 2013 사이버 커뮤니케이션 학보 Vol.30 No.3
본 연구는 마케터의 자기노출이 기업에 대한 소비자의 인식에 어떤 영향을 미치는지 살펴봄으로써 기업의 SNS 마케팅 전략에 활용할 수 있는 근거를 제시하고자 기업 페이스북에서 마케터의 자기노출 수준(높음, 중간, 낮음)과 이용자의 관여도 수준(높음, 낮음)이 마케터(매력성, 태도)와 기업(SNS 태도, 태도) 인식과 행동에 미치는 영향을 검증하였다. 연구 결과, 마케터의 자기노출 주 효과는 나타나지 않았지만 마케터 자기노출과 이용자 관여도의 상호작용 효과가 발견됨으로써 자기노출 효과가 제한적으로 확인되었다. 자기노출의 긍정적 효과는 고관여 이용자 집단에게만 나타났는데, 고관여 이용자의 경우 높은 정보처리 능력과 동기를 가지고 SNS를 통해 주어지는 정보를 집중해서 처리하기 때문으로 해석할 수 있다. 본 연구는 자기노출을 마케팅 커뮤니케이션 영역에 적용하여 SNS 상에서 기업의 마케터의 자기노출에 대한 실무적, 이론적 함의를 제시하였다. This study examined the effect of self-disclosure level (high, middle, low) of the marketer and involvement level of the user (high, low) on marketer attractiveness, attitude toward the marketer, attitude toward SNS, and attitude toward the corporation. The result suggested that selfdisclosure did not have a main effect whereas there was an interaction between self-disclosure and involvement. The positive effect of selfdisclosure was found only for those with a higher level of involvement because they process SNS information centrally. This research applies self-disclosure in the context of marketing communication and provides practical strategies as well as theoretical explanations for the effects of marketers’ self-disclosure in SNS.
Soyeon Park,Haewon Shin,Pureum Noh,Seung-Yoon Oh,Hwakyung Hwang,Bitna Lee,Yongwhan Kim,Jae Chun Choe,Gilsang Jeong 한국응용곤충학회 2013 한국응용곤충학회 학술대회논문집 Vol.2013 No.04
Wolbachia is one of the most common endosymbionts best known to induce several reproductive alterations in its insect hosts. In some cases, the insect hosts harbor more than two strains of the bacterium. The Vollenhovia emeryi ant lives in dead trees and is morphologically subdivided into the long-winged and the short-winged. Interestingly the short-winged morph is free of Wolbachia, but only the long-winged morph is multiple- infected with the Wolbachia bacterium. We sampled four populations of the long-winged morph in Korea and performed pyrosequencing in Multilocus Sequence Typing (MLST), to determine the bacterial strain diversity. Six different gene regions (coxA, fbpA, ftsZ, gatB, hcpA and wsp gene) were targeted and amplified. However, the result shows that diversity of haplotypes is very high. The pyrosequencing approach in MLST, a new method of discriminating Wolbachia strains, is promising to effectively detect multiple infections and rare haplotypes.
( Haewon Choi ),( Hyo-shin Kim ),( Joon Sakong ) 영남대학교 의과대학 2023 Yeungnam University Journal of Medicine Vol.40 No.4
Background: With the establishment of international guidelines and changes in insurance policies in Korea, the role of targeted ultrasonography has increased. This study aimed to identify the rates and clinical course of anomalies detected using prenatal targeted ultrasonography. Methods: This study was a retrospective analysis of all pregnancies with targeted ultrasonography performed in a single secondary medical center over 5 years. Results: Fetal anomalies were detected by targeted ultrasonography in 137 of the 8,147 cases (1.7%). The rates of anomalies were significantly higher in female fetuses (2.0% vs. 1.3%). In cases of female fetuses, the rate of anomalies was significantly higher in the advanced maternal age group (2.4% vs. 1.2%). In cases of male fetuses, the rate of anomalies was significantly higher in nulliparous (2.4% vs. 1.5%) and twin (5.7% vs. 1.9%) pregnancies. Pulmonary anomalies were significantly more common in the multiparity group (17.6% vs. 5.8%). Among the 137 cases, 17.5% terminated the pregnancy, 16.8% were diagnosed as normal after birth, and 42.3% were diagnosed with anomalies after birth or required follow-up. Conclusion: Through the first study on the rates and clinical course of anomalies detected by targeted ultrasonography at a single secondary center in Korea, we found that artificial abortions were performed at a high rate, even for relatively mild anomalies or anomalies with good prognosis. We suggest the necessity of a nationwide study to establish clinical guidelines based on actual incidences or prognoses.