주거시설의 플래시오버 방지를 위한 각국의 내장재 기준 조사에 관한 연구

허예림 ( Hun¸ Ye-rim ),김윤성 ( Kim¸ Yoon-seong ),이병흔 ( Lee¸ Byeong-heun ),진승현 ( Jin¸ Seung-heun ),권영진 ( Kwon¸ Young-jin ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.2

In Korea, the risk of fire in buildings is increasing. Therefore, efforts are needed to reduce casualties and property damage. Accordingly, it is important to limit the flashover so that the fire inside the building does not expand to the outside. Flashover refers to the generation of upward airflow after the fire in the compartment, and when combustible gas accumulates in the upper part of the fire chamber and reaches about 500℃, explosive expansion combustion occurs inside the compartment. This can suppress flashover due to limitations on building interior materials. To this end, internal limitations are being implemented at home and abroad through standards related to internal materials. In this paper, we intend to secure basic data on domestic fire safety design by comparing domestic and foreign standards and reviewing the Japanese housing interior design manual.

李白 詩에서의 虛實 交叉 이미지 연구

김예림 ( Kim¸ Ye Rim ),김준연 ( Kim¸ Joonyoun ) 한국중국어문학회 2021 中國文學 Vol.108 No.-

This study focused on analyzing Tang Poet Li Bai’s poetic image on natural scenery. Through the study we found out his ways of composing the image did not only base on ‘real scenery.’ He also used ‘virtual’ component on the ‘actual’ component to form a image which contains multi layer of reality as well as fantasy in one picture. This crossing image of ‘reality’ and ‘virtuality’ allowed the poet to create image different from the other poet of his time. This image was formed firstly through method of ‘reflecting.’ Through reflective surface Li Bai was able to portray his inner feelings to be in a same frame as the actual outer object. He not only did this on reflective surface, his portrayal of two different component was in a same picture on non-reflective object which we set ‘Art Work’ as a main example. This phenomenon work of crossing two different component was also done through ‘image metaphor (moving image)’, which poet used when changing original state of object to something else. This creation of artistic image allowed his poetic image to have ‘aesthetic effect’ of forming image with persuasive fantastical surroundings. It also effectively intensified the invisible feelings to be expressed within the visible object. Last but not least this method diversified topic from simplicity to the state of complexity.

Changes in Independency between Two types of El Nino events under the Greenhouse Warming in CMIP5 Models

Yerim Jeong,Yoo-Geun Ham,Jong-Seong Kug 한국기상학회 2014 한국기상학회 학술대회 논문집 Vol.2014 No.10

Host-associated Genetic Differentiation in the Cotton-melo Aphid, Aphis gossypii Glover

Yerim Lee,Seunghwan Lee,Hyojoong Kim 한국응용곤충학회 2012 한국응용곤충학회 학술대회논문집 Vol.2012 No.05

Many polyphagous herbivore insects considered as a single species are indeed comprised of genetically differentiated host related races that utilize several unrelated plant families. Aphis gossypii Glover, one of the extremely polyphagous aphid species, has more than 100 host plants distributed worldwide. In Korea, it takes holocyclic life cycle, with a number of primary hosts, which is unusual for other aphid species. However, former population genetic studies on A. gossypii have dealt with the populations from only a few agricultural host plants. In this study, we hypothesized that different primary host utilization may be restricted for certain host races and this may play a key role of the genetic differentiation in this species. We collected the cotten aphid populations from 36 different host plants, 5 primary and 31 secondary hosts including various wild and non-cultivated plants. To determine population genetic structure, we analyzed genetic differentiation among those populations using 9 microsatellite loci. As results, four genetically distinct clusters were verified. Of the five primary host populations, there were significant gaps in genetic differences between Rhamnus-associated group and Hibiscus-associated group, and the other populations were affinitive with the Hibiscus-associated group. Overall, primary host populations have a higher level of genetic diversity than secondary host populations. Several populations associated with secondary hosts such as spiderwort, madder, and Korean lettuce were considerably differentiated in the result of principle component analysis, which nearly showed the species level difference similar to Aphis glycines Matsumura and Aphis sp. ex Rhamnus. Thus, there could be reproductively isolated by the loss of primary hosts, and might be already speciated from A. gossypii

New Record of Genus Micromyzodium (Hemiptera: Aphididae) from Korea

Yerim Lee,Hyojoong Kim,Seunghwan Lee 한국응용곤충학회 2013 한국응용곤충학회 학술대회논문집 Vol.2013 No.04

The aphid genus Micromyzodium David, 1958 is newly recognized in the Korean peninsula. This genus is characterized by very long dorsal abdominal hairs, almost 3-4 times as long as basal diameter of antennal segment III. Colonies of two Micromyzodium species; Micromyzodium kuwakuse Uye 1924 and Micromyzodium nipponicum Moritsu 1949 were collected on Fatoua villosa Nakai (Urticales: Moraceae) and Perilla frutescens Britton (Lamiales: Lamiaceae), respectively. In this study, we redescribed, illustrated, and measured for apterous viviparous females of the two species.

Stress Response to Acoustic Stimuli in an Aphid: A Behavioral Bioassay Model

Yerim Lee,Hyojoong Kim,Yikweon Jang 한국응용곤충학회 2012 한국응용곤충학회 학술대회논문집 Vol.2012 No.05

The green peach aphids, Myzus persicae (Sulzer), feed consistently and regularly throughout all stages of nymphs and adult. That is, honey dew production (HDP), which indicates a state of feeding, occurs at regular intervals within a given stage, and moving (MV), which interrupts feeding, tends to occur scarcely. We used these behaviors to test whether the sound stimuli acted as a stress in this species. We conducted the playback experiment in which acoustic stimuli with a combination of five frequency (100, 500, 1000, 5000, and 10000 Hz) and three intensity levels (66, 78, 90 dB SPL) were presented to all stages of aphids. Under all acoustic stimuli, HDP occurred less often, and MV occurred more often and longer. The results of two-way multivariate ANOVA showed that the stimulus frequency was a significant factor for variation in aphid behaviors in the playback experiment. However, there was no intensity effect on aphid’s behavior. Based on the electrical penetration graph experiment, aphid feeding was frequently stopped and lasted only for short durations under acoustic stimuli. The results of both experiments demonstrated that the acoustic stimuli were effective in inducing feeding suppression in this species. Thus, the acoustic stimuli may be a stressor in the green peach aphid. Furthermore, the behavioral bioassay employed in this study may be used to assess the effect of various stressors on aphids.

Acoustic stimuli as a feeding deterrent in the green peach aphid, Myzus persicae: Playback experiments

Yerim Lee,Bitna Lee,Youngkyo Jeon,Hyojoong Kim,Yikweon Jang 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.10

The green peach aphid, Myzus persicae (Sulzer), is one of the most important insect pests in the world. We have explored the possibility of using sounds as a stressor to control this species. Five sine wave frequencies (100, 500, 1000, 5000, 10000 Hz) with combination of three intensity (66, 78, 90 dB) were used as acoustic stimuli in the playback experiments. For behavioral bioassay, we examined frequencies of honeydew production (HDP) and wagging behavior, and duration of moving behavior. The HDP occurs regularly during each stage of nymphal or mature period, and rate of the HDP indicates a degree of food consumption. Aphids conduct wagging to determine a host plant or to find a feeding site. The moving behavior may be regarded as dispersal. As results, all acoustic stimuli significantly reduced rate of the HDP and increased rate of the moving behavior. There was a significant effect to induce the moving behavior in the test of 5000 Hz. In addition, the acoustic stimuli using 5000 Hz were the most effective to disturb feeding behavior of M. persicae at an individual level.

New Status of the Subgenus Nippocallis (Hemiptera: Aphididae: Calaphidinae), based on Molecular data

Yerim Lee,Seunghwan Lee 한국응용곤충학회 2015 한국응용곤충학회 학술대회논문집 Vol.2015 No.04

The subgenus Nippocallis (Matsumura, 1917) is one of the 10 subgenera of the genus Tuberculatus Mordvilko, 1894. Originally, this subgenus was regarded as an independent genus of the subtribe Myzocallidina by the distinct morphological features and the host plant association with Castanea (Fagaceae). We performed molecular and morphological analyses to determine whether genus Nippocallis belongs to Tuberculatus group. Molecular analysis of the combined data set of Cytochrome Oxidase subunit I COI, Cytochrome B CytB and Elongation Factor I-alpha EF1α indicated that Nippocallis form a sister clade of the genus Myzocallis Passerini, 1860, apart from the genus Tuberculatus. In this contexts, we propose Nippocallis as a separate genus of the subtribe Myzocallidina.

Inhibition of feeding behaviors using acoustic stimuli in aphids : Playback experiments

Yerim Lee,Hyojoong Kim,Yikweon Jang 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.05

The green peach aphid, Myzus persicae (Sulzer), is one of the most important insect pests in the world. We have explored the possibility of using sounds as a control agent in this species. Sine waves with four different frequencies (100, 500, 1000, 5000 Hz) were used as acoustic stimuli in the playback experiments. As a behavioral bioassay, we recorded honey dew production (HDP), wagging, and walking. HDP occurs regularly at each stage of nymphal and adult periods, and the rate of HDP may indicate a degree of food consumption. Aphids conduct wagging to determine a host plant or to find a feeding site. Walking may be regarded as dispersal. All acoustic stimuli significantly reduced the rates of HDP and increased the rates of wagging. There were no significant effect of acoustic stimuli on walking. Based on the bioassay, the acoustic stimulus with 5000 Hz seemed to be the most effective on inhibiting feeding behavior of this aphid species at an individual level.

A New Cryptic Species of Genus Aphis (Hemiptera: Aphididae) Sharing Primary and Secondary Host with the Cotton-melon Aphid, Aphis gossypii Glover

Yerim Lee,Seunghwan Lee,Hyojoong Kim 한국응용곤충학회 2013 한국응용곤충학회 학술대회논문집 Vol.2013 No.04

In terms of aphid species identification, both host plant association and morphological characteristics are crucial factors. However, aphids in the genus Aphis Linnaeus (Hemiptera: Aphididae) often are cryptic in morphology due to their rapid radiation. Moreover, overlapping host plant species can make difficult situation worse. Three cryptic species Aphis gossypii Glover, Aphis glycines Matsumura, and Aphis rhamnicola sp. nov. occur together on the Buckthorn, Rhamnus spp. in the overwintering season in Korea. Due to lacking informative morphological characters and host plant sharing, the new species recently has been recognized as a distinct species. In this study, A. rhamnicola sp. nov. on various host plants was compared with the primary host sharing species, A. gossypii and A. glycines, based on morphological and molecular characteristics. In the results, there were significant genetic differences between three species, despite the high similarities in morphology. Our results provide strong evidence for establishing new species, which seems to be a typical heteroecious species that alternates between only primary host, Rhamnus spp., and various secondary hosts. We describe a new species, A. rhamnicola sp. nov., for apterous and alate vivipara, fundatrix, ovipara, and gynopara, including diagnostic key for host sharing species in genus Aphis.