Recently, as the frequency of natural disasters has increased, causing enormous human and material damage, the importance of managing disasters is emphasized. In particular, as the concept of Build ...Back Better becomes meaningful, it has appeared that considering it during Post-disaster Reconstruction is a necessity. Therefore, in this study, the relative importance evaluation and correlation analysis were performed for each influencing factor through the derivation of the influencing factors that should be considered during the reconstruction approach stage of reconstruction after disasters, and a survey of overseas disaster-related experts. As a result of the analysis, 'Adaptability to the environment changes in the future was derived as the most significant influencing factor. It seems that the results of this study can be used as basic data when carrying out the reconstruction project. 최근 자연재해 발생빈도 증가로 막대한 인적 및 물적 피해가 발생함에 따라 재난관리에 관한 중요성이 증가하고 있다. 특히 발전적 재건 개념에 관한 중요성이 증가함에 따라 재건설 시 이에 관한 고려가 필요할 것으로 판단된다. 따라서 본 연구는 재난 후 재건설의 재건접근 단계 시 고려되어야 하는 영향요인에 관한 도출과 국외 재난 관련 전문가를 대상으로 한 설문조사를 통하여 영향요인별 상대적 중요도 평가와 상관분석을 수행하였다. 분석결과 가장 중요한 영향요인으로 '미래 환경변화에 대한 적응성'이 도출되었다. 본 연구 결과는 재건사업 수행 시 기초자료로 활용이 가능할 것으로 판단된다.
Purpose
The purpose of this study was to examine changes in the electromyographic (EMG) activity of the masseter muscle after radiofrequency therapy (RF).
Methods
Twelve rabbits were used in this ...study: four in each group according to the number of RF applications. Preoperative EMG in the masseter muscle was used as the control. EMG was recorded at 1, 2, 3, and 4 weeks after RF in each rabbit. The recorded data were analyzed in terms of voltage and frequency, and changes in recorded variables were compared among the groups. The relative activity in peak voltage, root mean square of the action potential, area of voltage, and area of frequency were investigated.
Results
When compared to preoperative values, the variables at 3 or 4 weeks after RF application were significantly different in the single and quadruple therapy groups (
P
< 0.05). There was no significant difference in the other groups (
P
> 0.05). When the samples were regrouped as two groups like small number of application group (one or two point) and large number of application group (three or four points), the area of voltage and the area of frequency were significantly different between the groups at 4 weeks (
P
< 0.05).
Conclusions
Masseter muscle activity after RF was significantly decreased compared to its preoperative state. The decreased activity was related to the number of applications and time elapsed after RF.
We propose a novel experimental scheme, called DAMSA (Dump-produced Aboriginal Matter Searches at an Accelerator), for searching for dark-sector particles, using rare nuclear isotope accelerator ...facilities that provide high-flux proton beams to produce a large number of rare nuclear isotopes. The high-intensity nature of their beams enables the investigation of dark-sector particles, including axion-like particles (ALPs) and dark photons. By contrast, their typical beam energies are not large enough to produce the backgrounds such as neutrinos resulting from secondary charged particles. The detector of DAMSA is then placed immediate downstream of the proton beam dump to maximize the prompt decay signals of dark-sector particles, which are often challenging to probe in other beam-dump-type experiments featuring a longer baseline, at the expense of an enormous amount of the beam-related neutron (BRN) background. We demonstrate that BRN can be significantly suppressed if the signal accompanies multiple, correlated visible particles in the final state. As an example physics case, we consider ALPs interacting with the Standard Model photon and their diphoton decay signal at DAMSA implemented at a rare nuclear isotope facility similar to the Rare isotope Accelerator complex for ON-line experiment under construction in South Korea. We show that the close proximity of the detector to the ALP production dump makes it possible to probe a high-mass region of ALP parameter space that the existing experiments have never explored.
Alkyllithium initiators with hydroxyl groups protected with either t-butoxy or t-butyldimethylsiloxy groups have been used to prepare α-functionalized polymers, α,ω-telechelic, α,ω-heterotelechelic ...and multifunctional star-branched polymers.
The results for efficient hydroxy‐functionalization of polymeric organolithium compounds in hydrocarbon solution at room temperature are described using oxirane, methyloxirane, ethyloxirane, ...phenyloxirane and oxetane. Conditions for quantitative hydroxy‐functionalization were observed for all oxiranes except methyloxirane, which undergoes significant proton transfer from the methyl group. The use of protected hydroxy‐functionalized alkyllithium initiators to prepare α,ω‐heterotelechelic polymers with ω‐amino and ω‐carboxy groups is described.
This paper proposes a new game-control interface using hand poses captured from a digital camera. Extracting skin color from the background-subtracted image is generally used for segmenting hand ...region. But it suffers from change in illumination, shadows and skin- colored objects so that unwanted subsets reduce accuracy in hand pose recognition. To deal with these problems, first, subtracting skin colors from the background image must be done and second, it mustn 't get affected by changes in background. The paper describes an approach to using variance of homogeneity for skin color extraction. Homogeneity which represents contrast in a window is robust against change in illumination and can be used to effectively extract skin color rather than color or brightness based subtraction from background. The recognition of hand poses proceeds by computing fourier descriptor of extracted pixels. This approach to recognition can robustly identify hand poses comparing to the others. Experiments on real-time game demonstrate the robustness of the proposed method.
We present a fast and robust algorithm for segmenting foreground object from background image by comparing local histograms. Background subtraction is a important preprocessing step for extracting ...the features that can be used for object tracking in surveillance system or HCI system in virtual environment. In this paper, the local histograms of the same area are used to compute a foreground probability. The histogram-based method is partially robust against illumination change and small moving objects in background. However without data quantization to reduce bin size, histograms are generally not suitable for realtime applications. Moreover quantization errors are a major drawback of using histograms. We propose a new method to keep the advantages of histograms without suffering computational load and quantization error using local kernel histogram with the multi-scaled integral histograms. We implement the video game interface with a trained neural network to prove the proposed method is highly applicable to coarse pose recognition.
Vision-based real-time game interface YoungJoon Chai; DongHeon Jang; KyuSik Chang ...
2009 International IEEE Consumer Electronics Society's Games Innovations Conference,
2009-Aug.
Conference Proceeding
In this paper, we will introduce a fast and robust method of constituting a probability map by extracting foreground object from background image which is basic technology to be applied to ...vision-based real-time game interaction. We implement a neural network with one hidden layer to recognize a motion of the probability map. In this process, we extract the foreground probability map which is robust against change of illumination using local binary pattern and improve the speed using integral histogram. Also, we use a novel Gaussian window frame mask which can be applied fast in the integral histogram process and reduce noise by adaptive Gaussian sigma value depending on the strength of edge. In the following, experiments are carried out and satisfactory results are obtained which indicate the fast and robust conditions.
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