• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2005.11a
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• pp.564-568
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• 2005

As functional requirements of automatic office machines like printers, ATMs, copying machines are on a trend for the higher speed and precision, extensive technical advances are being developed and implemented in the industry. Media transport system is a device to convey a sheet of paper in ATMs and printers. The stability of media transport system is a matter of concern as their operating throughput rapidly increases. And defects of belts or rollers in a transport system directly affect the level of stability of the system. Therefore an automatic diagnostic system for predicting various defects is necessary for the stable operation of the media transport system. A simulation based on multi-body dynamics has been done for a feasibility study of a system design for the defect anticipation.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10a
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• pp.346-348
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• 2001

이 논문은 메모리 재사용 알고리즘 중 하나인 복사 알고리즘의 공간 오버헤드를 완화시키기 위한 방법을 기술한다. 복사 알고리즘은 연속적인 메모리 공간을 확보하는 전통적인 메모리 재사용 알고리즘으로, 노드 크기가 일정하지 않은 추상 기계의 구현에 널리 사용되는 알고리즘이다. 그러나, 복사 알고리즘은 전체 힙 공간의 반을 복사 프로세스를 위해서 남겨두어야 하기 때문에 공간 오버헤드는 100%에 달한다. 이 논문에서는 공간 오버헤드를 완화시키는 기본 아이디어를 제시하고, 이 기본 아이디어에서 힙 경계 부분을 처리하기 위한 세 가지 방법을 제안한다.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.19 no.39
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• pp.177-192
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• 1996

The organization of business included many a factors that gave rise to the stress. The modem peoples in this organization lived in the flood of the stress. Job stress was an important factors which injured of the employee health, the employee health injured reduce the organizational function. The factors such as personal differences, stressors, personality, cognitive traits etc. should be considered in the study of job stress. The cognitive appraisal is an important factor in the study of job stress and a process of coping strategy. Job stress can be controlled and coped by organizational and personal ability. The coping strategy of job stress is also determined by the personal differences rather than by the intensity of stress symptoms. In copying the stress, to be considered the factors such as interpersonal correlation, organizational climate, career development, job redesign, selection and placement, training. However, these factors should be managed in the scientific, objective, reasonable manner effectively.

• Journal of Korea Multimedia Society
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• v.22 no.5
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• pp.527-534
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• 2019

Recently, Photo editing softwares such as digital cameras, Paintshop Pro, and Photoshop digital can create counterfeit images easily. Various techniques for detection of tamper images or forgery images have been proposed in the literature. A form of digital forgery is copy-move image forgery. Copy-move is one of the forgeries and is used wherever you need to cover a part of the image to add or remove information. Copy-move image forgery refers to copying a specific area of an image itself and pasting it into another area of the same image. The purpose of copy-move image forgery detection is to detect the same or very similar region image within the original image. In this paper, we proposed fast detection of forgery image using four step search based on discrete cosine transform and a four step search algorithm using discrete cosine transform (FSSDCT). The computational complexity of our algorithm reduced 34.23 % than conventional DCT three step search algorithm (DCTTSS).

• Proceedings of the Korea Information Processing Society Conference
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• 2010.11a
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• pp.1632-1634
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• 2010

고성능 재구성형 어레이 아키텍처는 애플리케이션에 내재된 병렬성을 충분히 활용하도록 풍부한 하드웨어 리소스로 구성되어 있다. 이러한 하드웨어 리소스는 소프트웨어 파이프라이닝 기반 코드할당 기법을 통하여 사용된다. 이러한 코드할당 기법은 기존의 소프트웨어 파이프라이닝 기법에 FPGA 에서의 라우팅 & 위치선정기법이 연결된 형식으로 구성된다. 이러한 기존의 연구들은 데이터 흐름 (data flow)을 단순한 형태로 가정하여 개발되었다. 따라서 루프 코드 펼침 (loop unrolling)에 따라서 발생되는 데이터 복사에 의한 흐름 (copy flow)은 코드 매핑할 때 고려하지 않기 때문에 소프트웨어 파이프라이닝 적용시 네트웍 리소스의 중복사용으로 인한 데이터 충돌문제(data congestion)로 Minimum Initiation Interval (MII)증가에 따르는 성능 저하가 발생할 수 있다. 본 연구에서는 다양한 데이터 복사 흐름까지 고려하도록 데이터 의존도 그래프 (Data Dependence Graph, DDG)를 확장하여 스케쥴링 단계에서 데이터 충돌 지연에 의한 MII 증가를 방지하여 최적의 시스템 성능을 얻도록 코드 할당 기법을 개발하였다.

• Journal of the Korean Society for Precision Engineering
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• v.13 no.11
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• pp.57-63
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• 1996

Monitoring of grinding troble occurring during the process is classified into the quantitative data which depends upon a sensor and the qualitative knowledge which relies upon an empirical knowledge. Since grinding operation is highly related with a large amount of functional parameters, it is actually deficulty in copying wiht the grinding troubles through the process. To cope with grinding trouble, it is an effective monitoring systems when occurring the grinding process. The use of neural networks is an effective method of detection and/or monitroing on the grinding trouble. In this paper, four parameters which are derived from the AE(Acoustic Emission) signatures are identified, and grinding monitoring system utilized a back propagation learning algorithm of PDP neural networks is presented.

• Journal of the Korean Institute of Telematics and Electronics
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• v.23 no.5
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• pp.681-691
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• 1986

To represent the relations of the data dependency and resource conflict among micro-operations(MOP's) in the compaction process of microprograms, we propose a DDM (data dependent matrix) representation method instead of the DAG (conventional directed acyclic graph). Also, we propose a global compaction algorithm of microprograms to prevent a kind of block copying by cutting the trace at a junction block. The DDM method and compaction algoristhm have been applied to the Lah's example. The results shows that the proposed algorithm is more efficient than the conventional algorithms in reducing in reducing the total execution time and control memory space.

• Korean Journal of Health Education and Promotion
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• v.18 no.2
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• pp.27-44
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• 2001

In this study, I investigate the drinking behavior and related factors among white collar workers in seoul. Examination was executed with questionnaire to 520 white collar workers. Drinking behavior involves frequency of drinking, amount of alcohol consumption in a drinking situation and alcohol-related problem. Related factors involves the general characteristics, the knowledge about alcohol, the allowable attitude about drinking, work stress and stress copying. This was analyzed with percentage, mean, standard deviation, t-test, ANOV A and pearson's correlation. The results are as follows: Data shows that about 96.3% of the respondents drink at least during the last year and 89.8% of the respondents drink at least during the last month. 59.4% male respondents drink 3-8 times a month, 44.8% female respondents drink 1-2 times a month. High prevalence rates were found in male, married person and those with low-religious spirit in a usual amount of drinking(p〈0.05), male in the latest amount of drinking(p〈0.05), male, forties, married person and those with the highest monthly family income and those with low-religious spirit in frequency of drinking during the latest month(p〈0.05). The score of alcohol-related problem(ARP) was as follows: male workers-2.61, female workers-1.61 out of 35. The score of ARP was statistically significantly different according to sex(p〈0.05). A positive correlation was observed between amount of drinking, frequency of drinking and ARP(p〈0.01). The score of knowledge about alcohol was 3.6 and any correlation and statistically significant difference were not observed between the knowledge about alcohol and drinking behavior. The score of allowable attitude about drinking was statistically significantly different according to sex(p〈0.05), age(p〈0.05). A positive correlation was observed between attitude about drinking and amount of drinking, frequency of drinking, ARP(p〈0.01). The work stress and stress copying had no significant relations with drinking behavior. Most respondents do not drink at stress situation.

• Journal of Korean Elementary Science Education
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• v.34 no.4
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• pp.447-457
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• 2015

This study has attempted to find the teaching methods for the elementary students with low science achievement by examining the differences of science learning motivation, academic stress and stress coping styles and the characteristics shown in the relationship between them. To achieve this, the differences of science learning motivation, academic stress and stress coping styles of the elementary students with low science achievement and their relationship was set up as a study problem. A science learning motivation using a science learning motivation questionnaire reconfigured with PALS along with underachievers diagnosis were measured targeting 660 elementary students located in Seoul. Using an academic stress questionnaire and stress coping style questionnaire, an academic stress and stress coping styles were measured. The results of analyzing the collected data are as follows. First, a science learning motivation of elementary students with low science achievement was lower than the general students but the academic stress was shown higher. Especially, the self-efficacy of science learning motivation was significantly lower and the school stress was highest. For stress coping styles, a tendency of passive and avoidment coping styles were shown higher than the general students. Second, among the science learning motivation of elementary students with low science achievement, the self-efficacy motivation and school stress have shown a negative correlation but had a positive correlation with the goal-oriented motivation centered on ability. In the correlation between the science learning motivation of elementary students with low science achievement and the stress coping styles, the pursuit of social support coping styles have shown a significant positive correlation with the science learning motivation and its subcategories. As a result of conducting a regression analysis on the influence of academic stress and stress copying styles on the science learning motivation of elementary students with low science achievement, among the academic stresses, the school stress was shown to have the biggest influence. Among the stress coping styles, the pursuit of social support coping styles had the biggest influence on the science learning motivation followed by active coping behaviors, passive and avoidment coping behaviors. Low science learning motivation as underachievement factors of elementary students with low science achievement was identified as having a relationship with high school stress and undesirable stress copying styles. Therefore, guidance and a program are required for the elementary student with low science achievement to have desirable stress coping methods on the stressful situations. In addition, for the improvement of science learning motivation, a learning environment is needed for the elementary students with low science achievement with seeking of relevant educational methods.

• Journal of Broadcast Engineering
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• v.21 no.6
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• pp.957-964
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• 2016

Acquisition of reliable depth maps is a critical requirement in many applications such as 3D videos and free-viewpoint TV. Depth information can be obtained from the object directly using physical sensors, such as infrared ray (IR) sensors. Recently, Time-of-Flight (ToF) range camera including KINECT depth camera became popular alternatives for dense depth sensing. Although ToF cameras can capture depth information for object in real time, but are noisy and subject to low resolutions. Recently, filter-based depth up-sampling algorithms such as joint bilateral upsampling (JBU) and noise-aware filter for depth up-sampling (NAFDU) have been proposed to get high quality depth information. However, these methods often lead to texture copying in the upsampled depth map. To overcome this limitation, we formulate a convex optimization problem using higher order regularization for depth map upsampling. We decrease the texture copying problem of the upsampled depth map by using edge weighting term that chosen by the edge information. Experimental results have shown that our scheme produced more reliable depth maps compared with previous methods.