본 논문에서는 현장 강제진동실험에서 측정된 수문의 고유진동수를 수치 시뮬레이션을 통해 얻은 대응 값과 비교하는 과정을 반복하여 수문의 부가질량을 보정하는 방법을 설명하였다. 보정된 부가질량이 수문의 내진성능평가에 미치는 영향을 평가하기 위하여 현장 강제진동실험이 행해진 수문을 대상으로 지진해석을 수행하였으며, Westergaard 부가질량을 사용한 수문의 수치모형이 실측 자료로 보정된 부가질량을 사용한 경우보다 최대 지진력과 최대 변위에서 상대적으로 큰 값을 산출하는 결과를 보여주었다.

The small brown planthopper (SBPH), Laodelphax striatelleus (Fallén), is a insect vector of Rice stripe virus (RSV) in temperate countries such as Korea, Japan, China, and Taiwan. As SBPH is able to overwinter successfully in these areas, RSV disease in subsequent rice fields has been believed to be endemic. In Korea, however, the RSV disease outbreaks have been observed mainly but not continuously at some western regions since 2001, caused a severe damage to the rice production. Although many efforts are underway to explain the outbreak phenomenon, the exact related factors are not known yet. In the meantime of the study on SBPH population dynamics in 2009, we catched unusually large numbers of SBPH adults by aerial net traps, maximally over 900, in early June at western coastal counties such as Taean, Seocheon, Buan, Sinan, and Jindo in Korea. Age distribution changes of SBPH in winter and post-winter seasons at some selected fields shows that the adults might be not related to overwintering population. The adults of overwintering population emerged from early April. Newly hatched nymphs of first generation were found from mid-May. In late May, just before the unusual catch of adults, the developmental stages of SBPH were mostly below 5th instars. This means that the big adult populations would be results of mass migration of SBPH abroad. We present also spacial distribution and host relationship of overwintering population as well as viruliferous rate changes of immigratory population.

Without pesticide applications, mass-trapping by sex pheromone was successful to control Spodoptera litura (Fabricius) in a large scale tomato glasshouse (10,000 ㎡) at a low cost of 60 won/㎡. Pheromone traps were placed both inside and outside of the glasshouse. Inside the glasshouse traps were installed in a regular space, one trap per 500 ㎡, to catch the moths that were present in the glasshouse, and traps were also set outside of the glasshouse, at intervals of ca. 20 m, to prevent the moths from invading the glasshouse. In the experiment, more than 400 S. litura were captured per trap.

This paper intends to examine the significance of the “Minjoong Misool(People's art)” of the 1980s emerged in Korea in its social, cultural, and art historical context. This paper also aims to provide an analysis of the meaning and form of the individual artist's works, which have been overlooked under the dominant discourse that has emphasized their political role as a collective group. In particular, this paper scrutinizes the work of “Critical Realists” by examining the way in which they perceived Korean society in the early 1980s and visualized their experiences of the period. The figurative art newly emerged in the early 1980s challenged the formalist Modernism, which was adopted into Korea and translated into monochrome paintings and the work of the conversative academicism of the 1970s. The figurative art encouraged a social communication and moreover it intended to criticize the conflicts in the political, economical, and social domains in Korea. The targets of its critique include the unavoidable results of the unprecedented development of economy, various social phenomena of the post-industrial society, and the growth of the commercialized kitsch culture. Along with Shin, Hak-chul's work that incorporates collage technique since the 1980s, the work of some members of “Reality and Utterance” and “Im- sul-nyun” exemplify their critical interests in disclosing the false dream of wealth and happiness by both referring to and drawing on the utopian fantasy manipulated and distributed by mass media and commercial advertisements. This paper pays particular attention to Nouvelle Figuration emerged in France and Europe during the 1960s, which is comparable to the new figurative art emerged in Korea during the 1980s. Nouvelle Figuration criticized the autonomy in art isolated itself from political and social reality after WWII, in particular the indifference of Informel and abstract art as well as American abstract art. Moreover it became rather politicized around May of 1968. Given that French Nouvelle Figuration was introduced in Korea in 1982 and made a significant contribution to the formation of figurative art in Korea, it should be noted that the new figurative art emerged in the 1980s in Korea cannot be categorized merely in relation to People's Art. This paper intends to critically redress the notion that People's art was formed in the particular political, economical, and cultural context of Korea independent of the contemporary artistic practices outside Korea. It will provide a critical examination and analysis of the content and form of the new figurative art, from which People's Art was germinated, in the global context.

We estimate the enclosed mass profile in the central 10 pc of the Milky Way by analyzing the infrared photometry and the velocity observations of dynamically relaxed stellar population in the Galactic center. HST/NICMOS and Gemini Adaptive Optics images in the archive are used to obtain the number density profile, and proper motion and radial velocity data were compiled from the literature to find the velocity dispersion profile assuming a spherical symmetry and velocity isotropy. From these data, we calculate the the enclosed mass and density profiles in the central 10 pc of the Galaxy using the Jeans equation. Our improved estimates can better describe the exact evolution of the molecular clouds and star clusters falling down to the Galactic center, and constrain the star formation history of the inner part of the Galaxy.

본 연구에서는 동조질량감쇠기(TMD)와 동조액체 기둥감쇠기(TLCD)로 구성된 2방향 감쇠기의 제어성능을 실험적으로 검증하였다. 본 연구에 사용된 감쇠기는 한방향으로는 TMD로 거동하고, 다른 직교하는 방향에서는 TLCD로 거동하여 제어력이 발생하는 감쇠기이다. 우선, 제작된 감쇠기의 동적특성과 TMD와 TLCD에 의해 발생하는 제어력들의 연계효과를 조사하기 위한 진동대 실험을 수행하였다. 다음으로 이러한 실험결과를 바탕으로 감쇠기의 동적특성에 영향을 미치는 파라미터를 정량적으로 평가하였다. 본 연구에서 사용된 감쇠기가 입사각을 갖는 진동에 의해 가진될 때 TMD와 TLCD에 의해 연계된 제어력이 발생하는 것을 진동대 실험결과로부터 확인하였다. 또한, 감쇠기가 건축물의 2방향 응답제어에도 효과적으로 사용될 수 있음을 확인하였다.

열적으로 불안정한 강착원반의 비선형 유체역학적 모형에 기초하여 블랙홀 마이크로케이사의 광폭발 한계 순환주기에 대한 원반 질량의 시간적 진화 모형을 계산하였다. 블랙홀의 질량, 원반 크기 및 질량 유입률과 같은 물리적인 매개변수들은 블랙홀 X선 신성의 원형인 A0620-00에서 관측된 역사적인 1975 광폭발을 재현하도록 선택되었다. 중심부에서 원반으로 쪼여지는 조사(照射)의 시간에 따른 효과는 직접 조사와 원반위의 뜨거운 강착 흐름으로부터 굴절되어 원반에 쪼여지는 간접조사의 두 가지 방법이 고려되었다. 우리의 강착원반 열적 불안정성 모형은 광폭발의 순환과정 전반에 걸쳐 X-선 변광체들에서 관측된 광도의 전형적인 복사 광도를 설명할 수 있다. 강착원반의 최대질량 ∼4.03×1024g은 광폭발의 점화 때에 얻어지며, 최소질량 ∼8.54×1023g은 차가운 쇠퇴기와 정지기(靜止期) 때에 이루어진다. 원반의 질량은 광폭발 한계 순환주기에 걸쳐 약 5배 정도 변한다.

This work was intended for the identification of markers that are found only in the spoiled red pepper powder. When analyzed by GC/MASS, the spoiled red pepper powder contains characteristic naphthalene derivatives, 1, 2, 3, 5, 6, 7, 8, 8α-octahydro-1, 8α-dimethyl-7-(1-methylethenyl)-naphthalene and 2-isopropenyl-4α,8-dimethyl- 1, 2, 3, 4, 4α, 5, 6, 8α-octahydronaphthalene,which have not found in the normal red pepper powder. In addition, microscopic observation and microbial enumeration of the red pepper powder had been performed. Images by scanning electron microscopy showed that the surfaces of spoiled pepper powder were rough with many kinds of microbes, compared with those of normal red pepper powder. A good correlation between the bacterial and fungal counts in the same sample was observed and could be clearly classified into two groups, the normal and the spoiled group, by difference in the microbial counts. These results suggest that the spoiled red pepper powder can be identified by a combination of GC/MASS, microbial counts, and scanning electron microscopy.

A bi-axial tuned liquid mass damper(TLMD) was proposed and evaluated on its control performance. The proposed TLMD controls structural response in a specific one direction by using the liquid sloshing of TLCD. Also, the TLMD controls structural response in the other orthogonal direction by TMD behavior which mass consists of the container itself and liquid within container of TLCD installed on linear motion guides. Force-vibration tests on a real-sized structure with the TLMD were performed to verify its independent behavior in two orthogonal directions. Test results showed that the responses of a structure were considerably reduced by using the proposed TLMD and its usefulness for structural control in two orthogonal directions.