• The KIPS Transactions:PartB
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• v.16B no.4
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• pp.271-280
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• 2009

In this paper, we propose a smoke detection method using region growing method in outdoor video sequences. Our proposed method is composed of three steps; the initial change area detection step, the boundary finding and expanding step, and the smoke classification step. In the first step, we use a background subtraction to detect changed areas in the current input frame against the background image. In difference images of the background subtraction, we calculate a binary image using a threshold value and apply morphology operations to the binary image to remove noises. In the second step, we find boundaries of the changed areas using labeling algorithm and expand the boundaries to their neighbors using the region growing algorithm. In the final step, ellipses of the boundaries are estimated using moments. We classify whether the boundary is smoke by using the temporal information.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.5
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• pp.229-235
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• 2010

In this paper, we propose a method to improve the efficiency of the moving object detection in real-time surveillance camera system. The existing methods, the methods using differential image and background image, are difficult to detect the moving object from outside the video streams. The proposed method keeps the background image if it doesn't be detected moving object using the differential value between a previous frame and a current frame. And the background image is renewed as the moving object is gone in a frame. To decide people and wild pig, the proposed system estimates a bounding box enclosing each moving object in the detecting region. As a result of simulation, the proposed method is better than the existing method.

• Mass Spectrometry Letters
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• v.1 no.1
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• pp.17-20
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• 2010

As background significantly affects measurement accuracy and a detection limit in determination of the trace amounts of uranium, it is necessary to minimize the impurities in the filaments used for thermal ionization mass spectrometry (TIMS). We have varied the degassing condition such as the heating currents and duration times to reduce the backgrounds from the filaments prepared with zone-refined rhenium tape. The most efficient degassing condition of the heating current and the duration time was determined as 3.5 A and 60 min, respectively. The TIMS measurement combined with the isotope dilution mass spectrometry (IDMS) technique showed that the uranium backgrounds were determined to be in a few fg level from blank rhenium filaments. The background minimized filaments were utilized to measure the uranium isotope ratios of a U030 (NIST) standard sample. The excellent agreement of the measurement with the certified isotope ratios showed that the degassing procedure optimized in this study efficiently reduced the impurity signals of uranium from blank rhenium filaments to a negligible level.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.12
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• pp.5856-5864
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• 2011

In this paper, we propose a moving object detection method in road video sequences acquired from a stationary camera. Our proposed method is based on the background subtraction method using Gaussian pyramids in both the background images and input video frames. It is more effective than pixel based subtraction approaches to reduce false detections which come from the mis-registration between current frames and the background image. And to determine a threshold value automatically in subtracted images, we calculate the threshold value using Otsu's method in each frame and then apply a scalar Kalman filtering to the threshold value. Experimental results show that the proposed method effectively detects moving objects in road video images.

• Current Optics and Photonics
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• v.2 no.2
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• pp.165-171
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• 2018

Fourier ptychographic microscopy (FPM) is a recently proposed computational imaging method that achieves both high resolution (HR) and wide field of view. In the FPM framework, a series of low-resolution (LR) images at different illumination angles is used for high-resolution image reconstruction. On the basis of previous research, image noise can significantly degrade the FPM reconstruction result. Since the captured LR images contain a lot of dark-field images with low signal-to-noise ratio, it is very important to apply a noise-reduction process to the FPM raw dataset. However, the thresholding method commonly used for the FPM data preprocessing cannot separate signals from background noise effectively. In this work, we propose an improved thresholding method that provides a reliable background-noise threshold for noise reduction. Experimental results show that the proposed method is more efficient and robust than the conventional thresholding method.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.365-372
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• 2007

The function of navigational aids are to be coincided with the development of navigational equipment and increase of traffics on the sea fairway. Supplementary function or side effect of wharf-edge illumination would be effective to indicate fairway indirectly and collision avoidance between ships and bridge against background light in port area at night also a serious-view light on the bridge posts would be effective to ensure the drifting ships by wind and current force adjacent bridge area.

• Journal of Powder Materials
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• v.11 no.1
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• pp.60-68
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• 2004

Pulsed wire evaporation (PWE) method is known as the promising production-technique for nanopowders. In this study, we developed and modified the previous single wire explosion equipment to the simultaneous two-wire explosion one for the fabrication of alloy or mixture of nano metallic powder. First of all, both the theoretical and empirical background of pulsed wire explosion of single wire were summarized, and compared with our experimental results for Cu and Al single wlre explosion. After then, the simultaneous wire evaporation equipment was designed, constructed, and tested. The current and voltage behavior were well matched between the calculated ones from the circuit equations, and the experimental results from simultaneous explosion of Cu and Al wire.

• Korean Journal of Child Studies
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• v.26 no.2
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• pp.175-191
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• 2005

Sweden has one of the world's most progressive and comprehensive childcare systems; synonymous with quality, it is the envy of many other countries. The purpose of this study was to investigate background factors important to the development of the Swedish childcare system and the current childcare policy and system. This study found that underpinning the Swedish childcare system is not only the expectation that men and women will participate equally in the workforce, child rearing, and domestic life but also an awareness of the right of children to development and education. Implementation of the Swedish childcare policy has provided for easy access and affordable childcare centers following principles of childcare universalism. This provides practical suggestions for the Korean childcare policy and system.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.17
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• pp.169-195
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• 2002

The main issue relating to electronic bill of lading is to develop the system in which can transfer the title to the goods by electronically, and to support effect of electronic transfer of title by law. BBL, electronic bill of lading being operated by bolero, provides technical devices to that purpose, but current law is not recognize the effect of transfer of title by electronic communication because BBL is different from paper bill of lading naturally. For that reason Bolero has resolved the problem by Rulebook which is multilateral agreement contracted between users and BAL. The Rulebook provides solution, so called, 'attornment' and 'novation'. So, The purpose of this study is to help in understanding BBL through comparison and analysis about the legal background of transfer of title by BBL based on 'attornment' and 'novation' with transfer of bill of lading based on a endorsement and delivery.

• Journal of muscle and joint health
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• v.21 no.3
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• pp.236-245
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• 2014

Purpose: The purpose of this study was to identify influential factors on compassion fatigue in hospital nurses. Methods: A cross-sectional descriptive design was conducted with a survey of 358 general hospital nurses in Busan Gyeongnam area. For data analysis, descriptive statistics, Pearson's correlation coefficients, and multiple regression were performed using SPSS/WIN 18.0 for Windows. Results: The mean score was 28.53 in compassion fatigue. As a result of multiple regression analysis, empathic ability, stress coping strategy, current workplace, and academic background were statistically significant predictors explained 26.0% of the variance of compassion fatigue. Conclusion: It was suggested to consider emphatic ability, stress coping strategy, workplace, and academic background when developing a program available for preventing and easing nurses' compassion fatigue.