• Journal of the Korea Society of Computer and Information
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• v.20 no.6
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• pp.87-97
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• 2015

An Aerial video summarization is not only the key to effective browsing video within a limited time, but also an embedded cue to efficiently congregative situation awareness acquired by unmanned aerial vehicle. Different with previous works, we utilize sensor operation mode of unmanned aerial vehicle, which is global, local, and focused surveillance mode in order for accurately summarizing the aerial video considering flight and surveillance/reconnaissance environments. In focused mode, we propose the moving-react tracking method which utilizes the partitioning motion vector and spatiotemporal saliency map to detect and track the interest moving object continuously. In our simulation result, the key frames are correctly detected for aerial video summarization according to the sensor operation mode of aerial vehicle and finally, we verify the efficiency of video summarization using the proposed mothed.

• Journal of the Korea Society of Computer and Information
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• v.13 no.4
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• pp.79-86
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• 2008

As the rapid development of the Internet, the embedded images in HTML web pages nowadays become predominant. For its amazing function in describing the content and attracting attention, images become substantially important in web pages. All these images consist a considerable database. What's more, the semantic meanings of images are well presented by the surrounding text and links. But only a small minority of these images have precise assigned keyphrases. and manually assigning keyphrases to existing images is very laborious. Therefore it is highly desirable to automate the keyphrases extraction process. In this paper, we first introduce WWW image annotation methods, based on low level features, page tags, overall word frequency and local word frequency. Then we put forward our method of multi-cues integration image annotation. Also, show multi-cue image annotation method is more superior than other method through an experiment.

• Archives of Pharmacal Research
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• v.26 no.12
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• pp.1067-1073
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• 2003

Ursodeoxycholic acid (UDCA) is a non-toxic, hydrophilic bile acid in widespread clinical use mainly for acute and chronic liver disease. Recently, treatment with UDCA in hepatic graft-versus-host disease has been given in immunosuppressive therapy for improvement of the biochemical markers of cholestasis. Moreover, it has been reported that UDCA possesses immunomodulatory effects by the suppression of cytokine production. In the present study, we hypothesized that UDCA may inhibit the production of the pro-inflammatory cytokine, IL-1$\beta$, and nitric oxide (NO) in microglia. In the study, we found that 100 $\mu$ g/mL UDCA effectively inhibited these two pro-inflammatory factors at 24 hand 48 h, compared to the $A\beta$42-pretreated groups. These results were compared with the LPS+UDCA group to confirm the UDCA effect. As microglia can be activated by several stimulants, such as $A\beta$42, in Alzheimers brain and can release those inflammatory factors, the ability to inhibit or at least decrease the production of IL-1$\beta$ and NO in Alzheimers disease (AD) is essential. Using RT-PCR, ELISA and the Griess Reagent System, we therefore found that UDCA in $A\beta$42 pre-treated cultures played a significant role in suppressing the expression or the production of IL-1$\beta$ and NO. Similarly, lipopolysaccharide (LPS) did not activate microglia in the presence of UDCA. Moreover, we found that UDCA exhibits a prolonged effect on microglial cells (up to 48 h), which suggests that UDCA may play an important role in chronic cell damage due to this long effect. These results further imply that UDCA could be an important cue in suppressing the microglial activation stimulated by massive AD peptides in the AD progressing brain.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.28 no.4
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• pp.55-62
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• 2005

This paper describes the experiment that investigated the possibility of design and evaluation of the usability of earcon applied to voice menu. The earcon has functions in providing navigational cue in the hierarchical menu, and also can be applied to voice menu for improving the recall rate and the response time. In this experiment, participants identified their location with the help of earcon applied to the voice menu with the various earcon parameters. In detail some participants listened to the good quality sound of voice menu using the structured earcon, and they recalled the location they heard. Other participants listened to the good quality sound of voice menu without earcon, and they recalled the location they heard in the same manner. And the response times were checked through their answers. On analyzing the results, we found the earcon applied to voice menu showed the increase of recalling rate from what they heard during experiment. That is the performance of task was better with earcon applied to voice menu than with voice menu without earcon. In the earcon applied to voice menu test, it showed the accuracy of 92.50%, but in voice menu without earcon test, people could only recall 66.25% among given questions. The response time was reduced from 4.98 sec to 3.85 sec. In addition, this experiment showed the 87.5% of participants preferred the earcon applied to voice menu.

• The Journal of the Korea Contents Association
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• v.5 no.6
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• pp.74-86
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• 2005

In this paper, we proposed an algorithm for the approximation of high order FIR filters by low order IIR filters to efficient implementing two channel 3-D surround sound systems using Head-related transfer functions(HRTFs). The algorithm is based on a concept of the balanced model reduction. The binaural sounds using the approximated HRTFs are reproduced by headphone, and serves as a cue of sound image localization. HRTFs of dummy-head are approximated from 512-order FIR filters by 32-order IIR filters and compare with each other. .Experiment of sound image are carried out for 10 participants. We perform the experiment based on computer simulation and hardware experiment with TMS320C32. The results of the experiments show that the localization using the approximated HRTFs is the same accuracy as the case of FIR filters that simulate the HRTFs.

• The Journal of the Korea Contents Association
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• v.15 no.5
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• pp.47-54
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• 2015

The following research analyzes that the level of self-monitoring have an influence on user experience about website. For this research, university students participated in a survey where they evaluated user experience -usability, aesthetics, pleasure- about the new screen images of two homepages of differences in brand recognizability. The "self-monitoring(high/low, except for middle)" and the "brand recognizability(high/low, except for middle)" were set as independent variables and the "usability | deviation |", the "aesthetics | deviation |", the "pleasure | deviation |" were set as the dependent variables. Results, as with new screen images of homepage, there were significant differences in the usability and aesthetics based on the level in self-monitoring. Especially, when level of brand recognizability is low, there was more differences in the usability and aesthetics based on the level in self-monitoring. However, the influence of pleasure on self-monitoring was insignificant.

• The Journal of the Korea Contents Association
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• v.15 no.2
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• pp.31-39
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• 2015

2D-to-3D video conversion vests 3D effects in a 2D video by generating stereoscopic views using depth cues inherent in the 2D video. This technology would be a good solution to resolve the problem of 3D content shortage during the transition period to the full ripe 3D video era. In this paper, a low-complexity depth generation method for 2D-to-3D video conversion is presented. For temporal consistency in global depth, a pattern-based depth generation method is newly introduced. A low-complexity refinement algorithm for local depth is also provided to improve 3D perception in object regions. Experimental results show that the proposed method outperforms conventional methods in terms of complexity and subjective quality.

• Journal of the Ergonomics Society of Korea
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• v.25 no.4
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• pp.81-90
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• 2006

Despite the government promoting women's participation in the engineering field, some statistics show that it has yet to be achieved. Potential reasons for this phenomenon include lower level of applications by women, or inherent gender gap in the professional field. Therefore, this study attempted to find impact of gender on college admission from the Lens Model perspective and Signal Detection Theory. This study consisted of three phases: identifying the necessary cues used in the admission process, analyzing existing data, and conducting two experiments to identify the effect of gender on admission decisions. Although the college application consisted of many cues, only five cues, school ranking, GPA, SAT score, resident status, and gender, were used to capture the officers' judgment policies for engineering admissions. Two experiments were conducted to investigate the impact of the gender factor in college admission. The enrollment officers first were presented with the existing data without the gender and asked to make dichotomous judgments. Secondly, the officers were asked to perform the judgment task with the gender cue present. Results showed that the gender did not play an important role in the judgments as expected. However, ideographical analyses on judgment strategies revealed that there were significant differences between the admission officers. Possible training implications are discussed.

• International journal of advanced smart convergence
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• v.5 no.4
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• pp.15-20
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• 2016

When a virtual sound source for 3D auditory system is reproduced by a linear loudspeaker array, listeners can perceive not only the direction of the source, but also its distance. Control over perceived distance has often been implemented via the adjustment of various acoustic parameters, such as loudness, spectrum change, and the direct-to-reverberant energy ratio; however, there is a neglected yet powerful cue to the distance of a nearby virtual sound source that can be manipulated for sources that are positioned away from the listener's median plane. This paper address the problem of generating binaural signals for moving sources in closed or in open environments. The proposed perceptual enhancement algorithm composed of three main parts is developed: propagation, reverberation and the effect of the head, torso and pinna. For propagation the effect of attenuation due to distance and molecular air-absorption is considered. Related to the interaction of sounds with the environment, especially in closed environments is reverberation. The effects of the head, torso and pinna on signals that arrive at the listener are also objectives of the consideration. The set of HRTF that have been used to simulate the virtual sound source environment for 3D auditory system. Special attention has been given to the modelling and interpolation of HRTFs for the generation of new transfer functions and definition of trajectories, definition of closed environment, etc. also be considered for their inclusion in the program to achieve realistic binaural renderings. The evaluation is implemented in MATLAB.

• The Research Journal of the Costume Culture
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• v.15 no.4
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• pp.569-579
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• 2007

The purpose of the present study was to understand the clothing behavior of high school girls, and to analyze the differences of the behavior in accordance with their family self-concept and residential area. The study was implemented through a normative-descriptive survey method using a questionnaire. The survey was conducted in April 2006, and the sample consisted of 462 girls from 5 high schools. The data were analyzed by t-test, factor analysis, and cluster analysis. The results are as follows: I. In general, the family self-concept of high school girls was considerably positive, and the group from the Gangbuk area showed a more positive family self-concept than the group from Gangnam. 2. The group from Gangnam displayed a higher score in conformity, fashionability, and economy than the group from Gangbuk did. In terms of personality, the group from Gangbuk showed a higher score than the group from Gangnam. 3. The group having a more positive family self-concept showed a higher score in aspects of personality and psychological dependency. In the areas of conformity and fashionability, the group having a more positive family self-concept manifested a lower score. 4. In the case of the group having a more positive family self-concept, the girls from Gangnam, more than the group from Gangbuk, evidenced a higher score in conformity and fashionability, but showed a lower score in personality. In the case of the group having a lower score regarding family self-concept, the girls from Gangnam, more than those from Gangbuk, showed a higher score in conformity, fashionability, and economy. On the other hand, the personality score of the girls from Gangnam was lower than that of the Gangbuk group. Considering the results of the study mentioned above, it could be said that the clothing behavior of high school girls is different according to their family self-concept and residential area, and such clothing behavior could be used as a cue to understanding their family self-concept.