• Korean journal of applied entomology
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• v.45 no.2 s.143
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• pp.235-240
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• 2006

Efficacies of two commercial mating distruptor (SPLAT$^{(R)}$ and Isomate$^{(R)}$-ROSSO) were evaluated on field overwintering populations of Oriental fruit moth, Grapholita molesta (Busck), in four apple orchards. Based on the monitoring with sex pheromone traps, all the orchards (Youngchun, Kyungsan, Chungsong, and Youngju in Korea) exhibited significant overwintering populations from late April to late May. Both mating disruptors that were applied 10 days before the monitoring period significantly inhibited the male orientation to the monitoring lures, in which SPLAT type was more effective than Isomate type in the disrupting efficacy. The disruption of male orientation was highly correlated with the reduction in the early leaf damage caused mostly by G. molesta.

• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.8-8
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• 2017

본 연구는 원주천 16 km 구간을 대상으로 안정하도 설계에 따른 하상의 변동과 그에 따른 물리적 생물학적 교란 영향을 분석하였다. 안정하도 설계를 위한 방법으로 구간별 안정경사관계곡선을 도출하였으며, 현재 하도의 구간별 경사와 비교하여 안정/불안정을 판단하였다. 원주천 대상구간은 총 20개구간 중 17개 구간이 안정한 하상경사로 나타났으며, 하류부 2개 지점과 상류부 1개 지점에서 불안정 경사로 나타났다. 불안정 구간의 안정하도 설계를 위한 방법으로는 하천시설물의 도입을 통한 하상변동의 유도로 안정경사를 설계하는 방법과 하도의 준설과 하상보호공의 설치에 따른 안정경사 설계 방법을 이용하였다. 하천시설물의 도입을 통한 안정하도 설계의 경우 2개의 구간에서 추가적인 안정하도의 설계로 총 19개 구간이 안정하도로 설계되었으며, 하도의 준설과 하상보호공의 설치에 따른 안정하도 설계의 경우 20개 구간 전부에서 안정경사로 설계되었다. 아울러 안정하도 설계에 따른 하천의 물리적 생물학적 교란 양상을 분석하기 위해 물리적 교란개선 평가 결과와 물리서식처의 변화를 분석하였다. PHABSIM 모형을 이용하여 원주천의 최우점종인 참갈겨니를 대상으로 평수량에 대한 서식적합도 (HS, habitat suitability)와 가중가용면적 (WUA, weighted usable area)의 변화를 분석하였다. 현재 상태와 5년의 하상변동 모의 후의 평가 분석결과를 하천시설물 도입과 하도의 준설에 따른 5년경과 후의 예측평가 결과와 비교 분석하였다. 하천시설물의 도입에 따른 안정하도 설계의 경우 물리적 교란개선 평가 결과는 현재상태보다 소폭 개선되었으며, 물리서식처는 현재상태 보다는 감소하나, 현재의 5년경과 후와 유사하게 나타났다. 하도준설과 하상보호공의 설치에 따른 안정하도 설계의 경우 물리적 교란개선 평가 결과는 미약하게 감소하였다. 물리서식처는 현재상태와 유사하게 나타났으며, 현재의 5년경과 후 보다는 증가하는 것으로 나타났다. 따라서 안정하도 평가와 물리적 교란개선 평가 및 물리서식처 분석을 통한 하천의 안정성과 건강성 증대 방안을 도출하였다.

• International Area Studies Review
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• v.14 no.1
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• pp.3-29
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• 2010

The purpose of this paper is to examine the transmission of domestic and foreign real and monetary disturbances into a small country with heavy imports of intermediate goods, and to analyze how the wage indexation in a small country affects the transmission of foreign disturbances into a small country. We consider the two countries, a small country and the rest of the world, two goods, and rational expectations world model under flexible exchange rate system with perfect capital mobility. We find out that foreign disturbances are transmitted into a small country through the price channel, the foreign output multiplier channel, and the nominal interest rate channel, and the foreign real balance channel. We have conducted an empirical investigation by using the Korean data for a small country and the U.S. data for a large country to see how real and monetary disturbances originating from the US affects the Korean economy with wage indexation.

• Journal of the Korea Society of Computer and Information
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• v.26 no.1
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• pp.69-76
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• 2021

Recentlly neural network approach for solving a singular perturbed integro-differential boundary value problem have been researched. Especially the model of the feed-forward neural network to be trained by the back propagation algorithm with various learning algorithms were theoretically substantiated, and neural network models such as deep learning, transfer learning, federated learning are very rapidly evolving. The purpose of this paper is to study the approaching method for developing a neural network model with high accuracy and speed for solving singular perturbed problem along with asymptotic methods. In this paper, we propose a method that the simulation for the difference between result value of singular perturbed problem and unperturbed problem by using neural network approach equation. Also, we showed the efficiency of the neural network approach. As a result, the contribution of this paper is to show the possibility of simple neural network approach for singular perturbed problem solution efficiently.

• The korean journal of orthodontics
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• v.28 no.5 s.70
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• pp.865-875
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• 1998

The purpose of this study was to investigate the angle formed by the Sella-Nasion(SN) plane and Frankfort-Horizontal(FH) plane and evaluate the correlation and difference of the FH plane to other horizontal reference planes. Through this study we hope to present a basis for selecting a horizontal reference plae which can be implemented in cephalometric studies and in surgical orthodontic treatment planning. 600 subjects were chosen following a clinical examination md lateral cephlometric X-rays were taken. According to cephalometric analysis the subjects were classified into 3 groups , Skeletal Class I malocclusion or normal occlusion group(male 50, female 50), Skeletal Class II malocclusion group(male 50, female 65) and Skeletal Class III malocclusion group(male 50, female 50). The results were as follows. 1. The angle formed by the SN plane and FH plane showed no difference among the malocclusion groups, but there was a significant sex difference. For males the angle measured was $7.47^{\circ}{\pm}2.40^{\circ}$ whereas for females it was $8.93^{\circ}{\pm}2.72^{\circ}$. 2. The angle formed by the SN plane or FH plane and Mandibular plane was higher in females for all malocclusion groups. This angle in the Skeletal Class I malocclusion group was lower than in the other two groups. 3. There was no difference among the sexes or malocclusion groups considering the angle formed by the FH plane and Palatal plane. 4. The genial angle in the Skeletal Class III malocclusion group was higher than in the Skeletal Class I and Class II malocclusion groups in both sexes.

• Journal of Korea Spatial Information System Society
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• v.10 no.2
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• pp.81-93
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• 2008

Current re-arrangement of river and waterway has been made uniformly ignoring characteristics of individual rivers thereby aggravating artificial river restructuring. Subsequently this severely affects the rivers' physical, chemical, and biological phenomenon. On the contrary, quantitative techniques to evaluate the aftermath of artificial river disturbance such as uprising of river bed, intrusion of foreign fisheries, and changes of ecological habitats are not available. To establish such quantitative techniques, analysis of river changes to evaluate the major causes of the river disturbance and its impacts is essential. Therefore, this study mainly focused on proposing a method which can be applied for the development of techniques to investigate river disturbance according to the major factors for the domestic rivers using airphotos and GIS techniques. For the analysis, the study area on the downstream of the river was selected and airphotos of the area were converted into GIS format to generate 'shape' files to secure waterways, river banks, and auxiliary data required for analyzing river disturbance. Trend analysis of the waterway sinuosity and changes of the flow path leaded to detailed verification of the river disturbance for specific location or time period, and this enabled to relatively accurate numbers representing sinuosity of the waterway and relevant changes. As the major results from the analysis, the relocation of waterways and the level of river sinuosity were quantified and used to verify the impacts on the stability of the waterways especially in the downstream of the dam. The results from this study enabled effective establishing proper measures against waterways' unstability, and emphasized subsequent researches for identifying better alternatives against river disturbances.

• Journal of the Daesoon Academy of Sciences
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• v.33
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• pp.179-218
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• 2019

This article examines some important issues in films about new religious movements (NRMs) that express and represent NRMs in sensationalistic ways and criticize them as immoral and antisocial cults. I presented a typology to analyze films about NRMs from the perspective of marginalized religions separated from established religions and also as alternative religions that replace the established religions. In recent times, films about NRMs have changed from being social criticisms that represents NRMs as perpetrators of brainwashing and the need for deprogramming to that of faithful participation and empathetic reflection. Films about NRMs that utilize empathetic reflection, including Wild Wild Country (2018), go beyond the normative, single-perspective formula to enable insiders to conduct self-reflection and outsiders to empathize through openness, varied perspectives with multi-faceted composition and polyphony. In contrast, films about NRMs that adopt the perspective of faithful participation, including The Road to Peace (1984), present a new visual way to unravel the voices of silenced subalterns with alternative religious visions and those who needed relief from the marginalization due to alienation or exclusion from established religions. In the Korean context, these visions are expressed as 'the great transformation into the creation of a paradise of the Later World (後天開闢)' or as 'the resolution of grievances for mutual beneficence (解冤相生).'

• Journal of the Korea Computer Industry Society
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• v.6 no.2
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• pp.259-264
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• 2005

This paper have derived an expression(the fringe modle is used) for the photocurrelation-correlation function for a cross-beam laser velocimeter, taking into account the effects of atmospheric turbulence on the amplitude and phase of the incident beams. the result, as long as the atmospheric disturbances do not greatly damp out sinusoidal variations of the photocurrent-correlation function in the time it takes a particle to travel the fringe-separation distance, the disturbances do not hinder the determination of the velocity of the partides from the correlation funtion.(the scattering particles are assumed to have a well-defined V).

• The Journal of the Acoustical Society of Korea
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• v.17 no.7
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• pp.57-60
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• 1998

본 논문에서는 MKM(Modified K-Means) 알고리듬의 성능을 개선하기 위해 새로운 학습알고리듬을 제안한다. MKM 알고리듬에서 새로운 코드워드는 이전 코드워드와 새로 얻 은 중심점을 이은 직선 상의 임의적으로 선택된다. 따라서 MKM 알고리듬은 통계적 이완 방법의 코드북 교란 알고리듬으로 이해될 수 있다. MKM 알고리듬을 통계적 이완 알고리듬 과 비교해보면 도입되는 교란의 양이 상대적으로 적고 그 교란 자체도 임의적이지 않다는 걸 알 수 있다. 따라서 MKM 알고리듬에 도입되는 교란의 양을 보다 크고 임의적이게 하면 MKM 알고리듬이 국소 최적화에 빠질 가능성이 줄어들 것이다. 따라서 본 논문에서는 MKM 알고리듬의 코드북 갱신과정을 변화시킨 새로운 알고리듬을 제안하였으며, 화상 데이 터와 음성 데이터를 이용하여 실험한 결과 제안된 알고리듬이 MKM 알고리듬보다 우수한 성능을 보인다는 걸 확인할 수 있다.

• Proceedings of the Acoustical Society of Korea Conference
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• autumn
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• pp.179-182
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• 2004

혈관의 협착으로 인만 혈류의 교란과 그로 인한 초음파 반향의 영향을 튜브에 편심 협착 (eccentric stenosis)을 부착하고 돼지 혈액을 이용해 실험실에서 연구했다. 상용화된 GE LOGIQ 700 Expert 시스템과 M12L 의 선형 트랜스듀서를 이용해 B-모드 영상을 얻은 후 편심 협착 상류 지점과 하류 지점의 초음파 영상을 비교하여 분석하였다. 분당 20 회와 40 회의 박동율과 혈류속도를 바꿔가며 혈류의 교란에 따른 혈액에서의 초음파 영상을 분석한 결과, 편심 협착으로 인한 혈류의 교란으로 적혈구 응집현상이 달라져 복잡한 초음파 반향 분포가 형성되었다. 비침습적 실시간 초음파 영상은 편심 협착으로 인한 혈류의 교란과 그로 인한 혈액의 적혈구 응집 현상을 이해하고 연구하는데 도움이 된다.