• Asian-Australasian Journal of Animal Sciences
• /
• 제18권6호
• /
• pp.868-872
• /
• 2005

Individual management of the animal is the first step towards reaching the goal of precision livestock farming that aids animal welfare. Accurate recognition of each individual animal is important for precise management. Electronic identification of cattle, usually referred to as RFID (Radio Frequency Identification), has many advantages for farm management. In practice, however, RFID implementations can cause several problems. Reading speed and distance must be optimized for specific applications. Image processing is more effective than RFID for the development of precision farming system in livestock. Therefore, the aim of this paper is to attempt the identification of cattle by using image processing. The majority of the research on the identification of cattle by using image processing has been for the black-and-white patterns of the Holstein. But, native Japanese and Korean cattle do not have a consistent pattern on the body, so that identification by pattern is impossible. This research aims to identify to Japanese black cattle, which does not have a black-white pattern on the body, by using image processing and a neural network algorithm. 12 Japanese black cattle were tested. Values of input parameter were calculated by using the face image values of 12 cows. The face was identified by the associate neural memory algorithm, and the algorithm was verified by the transformed face image, for example, of brightness, distortion, noise and angle. As a result, there was difference due to a transformation ratio of the brightness, distortion, noise, and angle. The algorithm could identify 100% in the range from -30 to +30 degrees of brightness, -20 to +40 degrees of distortion, 0 to 60% of noise and -20 to +30 degree of angle transformed images.

• 한국콘텐츠학회논문지
• /
• 제13권11호
• /
• pp.277-287
• /
• 2013

본 연구에서는 혈액투석환자의 삶의 질과 사회적 지지와의 관계에서 공적 서비스가 수행할 수 있는 보완적 역할 가능성을 살펴보고자 하였다. 이를 위해 서울과 경기지역에 거주하고 있는 156명의 혈액투석환자를 대상으로 설문 조사를 실시하고 이 자료를 기초로 혈액투석환자의 삶의 질에 사회적 지지가 미치는 영향에서 공적 서비스의 조절효과를 분석하였다. 연구 결과 혈액투석환자의 삶의 질에 사회적 지지, 결혼형태, 직업유무가 유의미한 영향을 미치는 것으로 드러났고, 공적 서비스는 혈액투석환자의 삶의 질에 사회적 지지가 낮을 때 미치는 부적 영향을 완충해주는 조절효과를 가지고 있는 것으로 확인되었다. 이러한 결과를 근거로 혈액투석환자의 삶의 질을 높이는데 있어 공적 서비스 역할의 중요성과 효과적인 서비스 제공 방안을 제언하였다.

• Communications for Statistical Applications and Methods
• /
• 제25권3호
• /
• pp.245-261
• /
• 2018

Attempts have been made to define new classes of distributions that provide more flexibility for modelling skewed data in practice. In this work we define a new extension of the generalized gamma distribution (Stacy, The Annals of Mathematical Statistics, 33, 1187-1192, 1962) for Marshall-Olkin generalized gamma (MOGG) distribution, based on the generator pioneered by Marshall and Olkin (Biometrika, 84, 641-652, 1997). This new lifetime model is very flexible including twenty one special models. The main advantage of the new family relies on the fact that practitioners will have a quite flexible distribution to fit real data from several fields, such as engineering, hydrology and survival analysis. Further, we also define a MOGG mixture model, a modification of the MOGG distribution for analyzing lifetime data in presence of cure fraction. This proposed model can be seen as a model of competing causes, where the parameter associated with the Marshall-Olkin distribution controls the activation mechanism of the latent risks (Cooner et al., Statistical Methods in Medical Research, 15, 307-324, 2006). The asymptotic properties of the maximum likelihood estimation approach of the parameters of the model are evaluated by means of simulation studies. The proposed distribution is fitted to two real data sets, one arising from measuring the strength of fibers and the other on melanoma data.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제10권11호
• /
• pp.5476-5496
• /
• 2016

Energy efficiency of resource-constrained wireless sensor networks is critical in applications such as real-time monitoring/surveillance. To improve the energy efficiency and reduce the energy consumption, the time series data can be compressed before transmission. However, most of the compression algorithms for time series data were developed only for single variate scenarios, while in practice there are often multiple sensor nodes in one application and the collected data is actually multivariate time series. In this paper, we propose to compress the time series data by the Lasso (least absolute shrinkage and selection operator) approximation. We show that, our approach can be naturally extended for compressing the multivariate time series data. Our extension is novel since it constructs an optimal projection of the original multivariates where the best energy efficiency can be realized. The two algorithms are named by ULasso (Univariate Lasso) and MLasso (Multivariate Lasso), for which we also provide practical guidance for parameter selection. Finally, empirically evaluation is implemented with several publicly available real-world data sets from different application domains. We quantify the algorithm performance by measuring the approximation error, compression ratio, and computation complexity. The results show that ULasso and MLasso are superior to or at least equivalent to compression performance of LTC and PLAMlis. Particularly, MLasso can significantly reduce the smooth multivariate time series data, without breaking the major trends and important changes of the sensor network system.

• 대한안전경영과학회지
• /
• 제18권3호
• /
• pp.55-62
• /
• 2016

The purpose of this study is to understand how to affect the safety behavior to the organization's trustees to investigate the level of safety awareness, safety awareness via the distribution center workers prepare the logistics industry disaster prevention measures. The survey was analyzed data to target by the clothing distribution center employees of 182 people. Analysis First, the level of safety awareness showed on a positive effect on organization trust. Second, it was found on the safety level of consciousness a positive effect on the safety behavior. Third, the level of safety awareness affect the safety behavior showed that the mediating role of organization trust. That is a higher level of safety awareness, such as the strict practice of business activities, investments, safety rules on safety education and training emphasis on safety increases confidence in the organization. It was confirmed the higher the confidence in the safety organization appears behavior such as actively participating in the work carried out in a safe manner, safety education and training. In addition, the effect was mediated by the organizational impact on confidence in the safety of personnel safety awareness actions. Based on that research results prepared safety awareness was raised through the industrial accident prevention measures.

• 지구물리와물리탐사
• /
• 제12권1호
• /
• pp.114-120
• /
• 2009

단층 파쇄의 방향성은 지진 피해를 평가하는데 있어 매우 중요한 지진원 특성이다 하지만 기존의 모멘트 텐서 역산 방법으로는 단층의 파쇄 방향은 물론 실제 단층면의 방향도 정확하게 결정하기 어렵다. 본 연구에서는 중간 규모의 지진에 대하여 주파수 영역 파형 역산 방법을 이용하여 모멘트 텐서와 단층 파쇄의 방향성을 동시에 역산하는 방법을 제안하였다 여러 가지 다양한 파쇄 전파 모델을 가정한 수치 실험을 통해 역산 방법을 검증하였고, 실제 지진에 적응 가능성을 평가하기 위해 역산 해의 안정성에 가장 큰 영향을 주는 요소인 속도 구조 모델에 대한 민감도를 분석하였다. 민감도 분석 결과를 통해 속도 구조 모델이 실제 속도 구조와 크게 어긋나지 않을 경우 실제 지진에 대해서도 충분히 적응 가능하다는 것을 확인하였다. 향후 속도 구조가 비교적 잘 밝혀진 지역에 본 역산 방법을 적응 할 경우 중간 규모 지진의 단층 파쇄 효과를 효과적으로 추정할 수 있을 것으로 예상되며, 이를 통해 적용된 지역의 지진 발생 특성을 이해하는데 큰 도움을 줄 수 있을 것이다.

• 한국음향학회지
• /
• 제31권6호
• /
• pp.410-418
• /
• 2012

파라메트릭 스테레오와 MPEG 서라운드는 대표적인 공간 오디오 부호화 기법이다. 본 논문에서는 기존의 공간 오디오 부호화 기법에서 채널간 상관도 합성의 문제점을 분석하였다. 기존의 방법에서는 출력신호에 합성되는 주요성분들은 서로 동위상 관계에 있는 반면 잔향성분들은 서로 반위상 관계에 있다고 가정하고 있다. 음수 채널간 상관도에 대해서 이러한 가정은 잔향성분을 과도하게 포함하도록 하는 문제점을 야기할 수 있다. 이에 대한 해결책으로 음수 채널간 상관도를 가지는 경우에 대해서는 주요성분들이 반위상 관계에 있다는 가정을 기반으로 새로운 채널간 상관도 합성 기법을 제안하였다. 제안된 기법은 실제 부호화 및 복호화기에서 동작하는 근사화 과정에도 적용되었다. 컴퓨터 시뮬레이션을 통하여 제안된 기법의 성능을 평가하였으며 주관적 청취 실험을 통하여 제안된 방법이 헤드폰 환경뿐만 아니라 스피커 환경에서도 효과적으로 동작함을 검증하였다.

• 대한간호학회지
• /
• 제31권4호
• /
• pp.631-640
• /
• 2001

Purpose: The purpose was to investigate the physiological parameters and health perception of adults in Kyungi province area, and the correlation between these variables. The subjects were 95 adults who participated voluntarily in the health examination program. Methods: The instruments for this study were physiological parameters, which were composed of blood pressure, blood sugar, and body fat. The health perception scale developed by Ware (1976), and the health practice performance scale developed by Chang et al. (1999). Results: The average blood pressure was 137/85mmHg, the average blood sugar was 108.56mg/dl, and the average body fat arm sunt was 27.08% in males, and 30.07% in females. There were significant negative correlation between health perception and blood sugar (r=-2.36, p=.01), and body fat (r= -2.77, p=.001). There were significant positive correlations between blood pressure and health behavior (r=2.76, p=.001). However a significant correlation between health perception and health behavior was not found. Of the sociodemographic characteristics, sex (F=5.42, p=.01), and marital status (F=3.29, p=.04) were related to blood pressure. Also sex (F=4.17, p=.04) was related to body fat, and sex (t=4.04, p=.03) was related to health perception and disease status (t=4.33, p=.040). Thus having a relationship with health behavior. Conclusion: It is suggested that health perception provide important information about health status. However, this study has not shown a correlation between health perception and health behavior. Therefore further research is needed to find the other variables related to health behavior.

• 대한설비공학회:학술대회논문집
• /
• 대한설비공학회 2008년도 동계학술발표대회 논문집
• /
• pp.39-44
• /
• 2008

The heat exchange between the Borehole Heat Exchanger(BHE) and the surrounding ground depends directly on ground thermal conductivity k at the certain site. The k is thus a key parameter in designing BHE and coupled geothermal heat pump systems. Currently, although a thermal hydraulic response test(TRT) is mostly used in practice, the thermal hydraulic TRT needs additional power and is generally time-consuming. A new, simple wireless P/T probe for a hi-speed k determination was introduced in this paper. This technique using a wireless P/T probe is less time-consuming and requires no external source of energy for measurement and predicts local thermal properties by measuring soil temperatures along the depth. Measured temperature data along the depth was analyzed. In order to verify the new technique for the determination of ground thermal conductivity, ground thermal conductivity k that calculated from the measured temperature data using a wireless P/T probe was compared with one obtained from conventional hydraulic TRT. When comparing the average k of two methods, the relative error was approximately 10%. As a result, the electronic TRT can replace the conventional hydraulic TRT method after carrying out the additional research on a lot of sites.

• 전산구조공학
• /
• 제3권1호
• /
• pp.71-81
• /
• 1990

Base isolation system은 구조물의 기초하부에 설치되며 지진에 의한 구조물의 피해를 감소시켜 준다. 지금까지 많은 공학들에 의해 여러가지 base isolation system이 개발되었으나 실용화된 것은 1970년대에 laminated rubber bearing(LR type)이 개발되고서부터 였다. 최근에는 laminated rubber bearing밑에 미끄럼판을 둔 새로운 base isolation system(SR type)이 개발되었다. 본 연구에서는 isolation system과 구조물의 여러가지 성질에 따른 isolation효과에 대한 연구를 수행하였다. 이 연구의 결과, isolaion system은 지진하중이 작용할 때 건물에 발생하는 피해를 상당히 감소시킴을 알 수 있으며, isolaion system의 주기가 길어짐에 따라 isolation효과는 증가함을 알 수 있다. 그리고 건물의 높이가 증가함에 따라 isolation효과는 줄어든다는 것을 알 수 있다. SR type isolation system이 있는 건물에 지진하중이 작용할 때, 건물내부에서 발생하는 가속도와 층간변위, 그리고 전체변위는 LR type의 경우보다 작으므로 보다 효율적이라는 것을 알 수 있다.