• 터널과지하공간
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• 제21권6호
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• pp.460-470
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• 2011

자연환경하에 있는 암석의 풍화특성과 풍화된 암석의 강도평가를 위하여 다양한 크기의 아소 가족묘비석을 대상으로 탄성파 속도를 측정하였다. 그 결과 크기가 다른 시료를 동일한 크기로 환산하여 탄성파 속도를 평가하는 크기 보정법과 새로운 암석 풍화지표로서 NET(Normalized Elapsed Time)를 제안하였다. 또한 NET을 이용한 암석 풍화 분류로부터 풍화암석에 대한 강도를 추정하였다. 용결응회암의 경우 탄성파 속도는 높고 속도저하는 거의 나타나지 않았지만, 안산암의 경우 탄성파 속도는 낮고 속도저하 현상이 관찰되었다. $V_p/V_o$-NET 곡선에 근거한 NET를 이용할 경우 크기가 다른 다양한 암석에 대해 같은 크기로 풍화정도를 비교할 수 있을 것으로 판단된다. 또한 $S_c/S_o$-NET 곡선에 의한 NET을 이용하여 암석의 풍화단계 분류가 가능하였으며, 이것으로부터 풍화 암석에 대한 강도추정도 가능하였다.

• 수산해양기술연구
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• 제43권1호
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• pp.28-37
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• 2007

In order to develop the biodegradable monofilament gill net for the protection of marine ecosystem and reduction of ghost fishing, enpol monofilament gill net was made for Chionoecetes opilio using polybutylene succinate as a biodegradable chip. Catching efficiency on 2 type monofilament gill net, PA and Enpol, were carried out using 2 commercial fishing boats around the fishing ground of Wang-dol rock from January 2004 to May 2006. Enpol monofilament gill net spun polybutylene succinate as a biodegradable chip was appeared high practicality for Chionoecetes opilio gill net. Target fishing ratio were 98% and 98.3% for the PA and enpol monfilament gill net, respectively. In addition, CPUE ratio of female and male(CL < 90mm) to Chionoecetes opilio caught in the enpol gill net were 25.3-40.3%, 14.0-22.1% less than PA gill net, respectively. However, CPUE ratio of male(CL > 90mm) to Chionoecetes opilio caught in the enpol gill net were 2.5-11.3% more than PA gill net. There was no difference in CPUE of female and male to Chionoecetes opilio caught using 2 gill nets as a result of the significance level of 5% by T-test.

• 한국농공학회논문집
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• 제61권1호
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• pp.75-83
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• 2019

Fruit bagging is a traditional way to produce high-quality fruit and to prevent damage from insects and diseases. Growing pears by non-bagging is concerned about the damage from insect, it can be controlled by installing a insect net facility. Wind load should be considered to design the insect net facility because it has the risk of collapse due to the strong wind. So we carried out wind tunnel test for measurement of drag force, where the insect net with porosity about 65% is selected as an experimental subject. As a result of the test, drag force was measured to be 244.14 N when insect net area and wind speed are $1m^2$ and 22.7 m/s respectively. And, drag coefficients for the insect net were found to be about 0.55~0.57, which may be used as the preliminary data to design the insect net facilities at the orchard.

• 한국의류학회지
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• 제26권1호
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• pp.39-49
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• 2002

The purpose of this study was to characterize the effect of Net fashion value regarding to the factors of purchase-decision at internet shopping mall and the preference for fashion design. The subjects for this sample survey, were junior high school and university students who had dwelled at pusan and ulsan in south korea. This study had 824 samples of each aged from 13 to 24 who had purchasing ability of fashion apparels at the interned shopping mal1. The sampling data in this survey was analyzed by frequency analysis, factor analysis, T-test, LSD-test, MANOVA and ANOVA of SPSS WIN package. The results of this study was as follows; 1. It was proved that advertising, pursuit of services and products, pursuit of information were considered first from Net generations fashion value. Next things were perception of danger and pursuit of convenience. It was proved that they considered it important A/S, recall, exchange and post management. 2. It was proved that there was difference at the preference for fashion design of according to Net generations fashion value. Color was considered to be the most important one. 3. Men had higher political value than women and 1318 teenagers had higher fashion value than semi-adult. Under high school educational course Net generation had more theoretical value than above university educational course Net generation did. Also, with the factor of average monthly income, political value was considered to be the most important. People whose monthly expenditure on purchase was above 50,000 won had higher social value than people whose expenditure was under 50,000 won but under 50,000 won had higher political value than above 50,000 won did.

• 수산해양기술연구
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• 제45권4호
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• pp.211-222
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• 2009

The fisheries resources by a set net in the coastal waters off Neungpo, Goeje Island from 2003 to 2004 were studied to determine species composition and catch variation. The main fishing period by a set net were from April to December in 2003 and from May to December in 2004. A total weight of 48 species caught through the survey period was 540,688.0kg. Most of them were 44 species of fishes and a few were 4 species of cephalopods. Dominant species was Trachurus japonicus accounting to 57.5% in total catch. Sub-dominant species were Trichiurus lepturus(12.9%), Engraulis japonicus(10.6%), Scomber japonicus(6.9%), Clupea pallasii(4.5%), Todarodes pacificus(2.8%) and Parapristipoma trilineaturm(1.3%). The remnant species showed a low catch, indicating the catch had less than 1% in total, respectively. T. japonicus and T. lepturus were caught throughout the survey period, but C. pallasii, Gadus macrocephalus, Oncorhynchus keta in low temperature season and Thunnus obesus in high temperature season. The fishing ground temperature was 11.7-24.0${^{\circ}C}$ in range and the catch by a set net was higher in autumn than in spring and in summer with the variation of fishing ground temperature. The annual catch by a set net was much higher in 2004 than in 2003 due to high temperature(>17${^{\circ}C}$) and the recruitment of T. japonicus from offshore seas. Therefore we concluded that the catch of Neungpo fishing ground by a set net was highly related to the variation of T. japonicus catch with fishing ground temperature.

• International journal of advanced smart convergence
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• 제8권1호
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• pp.141-146
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• 2019

These days, there are many applications using neural networks as parts of their system. On the other hand, adversarial examples have become an important issue concerining the security of neural networks. A classifier in neural networks can be fooled and make it miss-classified by adversarial examples. There are many research to encounter adversarial examples by using denoising methods. Some of them using GAN (Generative Adversarial Network) in order to remove adversarial noise from input images. By producing an image from generator network that is close enough to the original clean image, the adversarial examples effects can be reduced. However, there is a chance when adversarial noise can survive the approximation process because it is not like a normal noise. In this chance, we propose a research that utilizes high-level representation in the classifier by combining GAN network with a trained U-Net network. This approach focuses on minimizing the loss function on high representation terms, in order to minimize the difference between the high representation level of the clean data and the approximated output of the noisy data in the training dataset. Furthermore, the generated output is checked whether it shows minimum error compared to true label or not. U-Net network is trained with true label to make sure the generated output gives minimum error in the end. At last, the remaining adversarial noise that still exist after low-level approximation can be removed with the U-Net, because of the minimization on high representation terms.

• 대한전자공학회논문지SD
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• 제41권5호
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• pp.1-7
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• 2004

규칙적인 논리적 연결방법을 이용하면 노드에서 라우팅을 위한 프로세싱 시간이 단축되므로 고속의 네트워크에 적용이 가능하다. 규칙적인 논리적 연결방법의 하나인 셔플넷은 일반적으로 p개의 직접 연결이 다른 노드들과 이루어진다. 그러나 우리가 제안한 비대칭 이중층 셔플넷 토폴로지를 이용하면 2p개의 노드들과 직접 연결되므로 더욱 용량이 증대된 파장분할방식 링을 설계할 수 있다. 이 비대칭 이중층 셔플넷 토폴로지를 이용하여 파장분할방식 링에 파장을 할당하는 방법을 본 논문에서 연구하였다. 필요한 파장수를 최소화하는 것을 목표로 네트워크를 최적화하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1989년도 추계학술대회 논문집 학회본부
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• pp.224-227
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• 1989

In this paper, The implementation of modular neural net for fault diagnosis in power system is presented. Until now, there have been many researches on expert system for fault diagnosis. On expert system, a lot of time for searching goal is needed. But, neural net processes with high speed, as it has parallel distributed processing structure. So neural net has good performance in on-line fault diagnosis. For fault diagnosis in large power system, the constitution of modular neural net with partition of large power system is presented.

• 대한전자공학회논문지SD
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• 제39권6호
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• pp.19-25
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• 2002

규칙적인 가상 연결방법을 이용하면 노드에서 라우팅을 위한 프로세싱 시간이 단축되어 고속의 네트워크에 적용이 가능하다. 규칙적인 가상 연결방법의 하나인 셔플넷은 일반적으로 p개의 연결이 다른 노드들과 이루어진다. 그러나 우리가 제안한 하나 걸른 행과 연결된 이중층 셔플넷 토폴로지를 이용하면 2p개의 노드들과 동시에 연결되므로 더욱 효과적인 광역 통신망에 적용할 수 있다. 이 하나 걸른 행과 연결된 이중층 셔플넷 토폴로지를 이용하여 물리적 토폴로지에 가상 토폴로지를 imbedding하는 방법을 본 논문에서 연구하였다. 전체 지연 시간을 최소화하는 것을 목표로 네트워크를 최적화하였다.

• 패션비즈니스
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• 제14권5호
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• pp.145-157
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• 2010

The market in the 21st century has drastically changed due to the advances of digital technology. This could be represented by the key words prosumer, do-it-yourself, mass customization, and so on. The net generation is in the center of change and nowadays teenage groups wearing school uniforms is a part of this generation. Therefore the current school uniform hardly fits their tastes and demands. This study aims to provide the fundamental information for developing the school uniforms for the net generation based on the study of the characteristic of net generation and questionnaires targeted at high school students regarding the current school uniform.