• The Journal of Korean Institute of Communications and Information Sciences
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• v.16 no.1
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• pp.46-56
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• 1991

In this paper, 16word X 8bit Content Addressable and Reentrant Memory(CARM) is described. This device has 4 operation modes(read, write, match, reentrant). The read and write operation of CARM is like that of static RAM, CARM has the reentrant mode operation where the on chip garbage collection is accomplished conditionally. Thus function can be used for high speed matching unit of dynamic data flow computer. And CARM also can encode matching address sequentially according to therir priority. CARM consists of 8 blocks(CAM cell, Sequential Address Encoder(S.A.E). Reentrant operation. Read/Write control circuit, Data/Mask Register, Sense Amplifier, Encoder. Decoder). Designed DARM can be used in data flow computer, pattern, inspection, table look-up, image processing. The simulation is performed using the QUICKSIM logic simulator and Pspice circuit simulator. Having hierarchical structure, the layout was done using the 3{\;}\mu\textrm{m} n well CMOS technology of the ETRI design rule.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.29 no.6
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• pp.1403-1412
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• 2019

Effect of damage and loss cost for downtime is huge, if physical devices such as turbines, pipe, and storage tanks are in the abnormal state originated from not only aging, but also cyber attacks on the control and monitoring system like PLC (Programmable Logic Controller). To improve availability and dependability of the physical devices, we design and implement an indirect health monitoring system which sense temperature, acceleration, current, etc. indirectly, and put sensor data into Influx DB in real-time. Then, the actual performance of detecting abnormal state is shown using the indirect health monitoring system. Analyzing data are acquired using the real-time indirect health monitoring system, abnormal state and security threats can be double-monitored and lower maintenance cost utilizing prognostics and health management.

• Journal of the Korean Geographical Society
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• v.44 no.2
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• pp.146-160
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• 2009

Recent studies on development are increasingly focusing on analyzing development discourse and de constructing its institutionalization process in the nation-state. By pushing up the limit of the research on development, these studies particularly emphasize how development is articulated with the nation-state, its governmentality, and various representations. These studies overall consider development a powerful discourse, which invents under-development, mobilizes resources for changing particular space, and institutionalizes modem systems of socio-spatial control at a local scale. In this sense, it is particularly interesting to look at how the nation-state, faced with the deterritorialization of labor and capital, reterritorializes overseas resources and networks for the purpose of development. By problematizing the Overseas Koreans Foundation as a transnational state apparatus, this paper interrogates the way in which its institutionalized practices conjure up the national imagination, ethnic solidarity, and collective allegiance to the homeland in diaspora communities. This paper conclusively reports that the state apparatus circulates the discourse of transnational nationalism in Korean diaspora so as to appropriate their resources and networks for securing foreign currencies and investment in the homeland.

• Korean Journal of Agricultural Science
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• v.41 no.4
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• pp.335-339
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• 2014

Cowper chlorotic mottle virus (CCMV) is the 'controlled' quarantine virus as plant pathogenic virus that are classed as group VI (+) ssRNA virus that belongs to the genus Bromovirus and family Bromoviridae, When plants that are Phaseolus vulgaris, Clitoria ternatea, Nicotiana tabaccum, Glycine max, Vigna unguiculata and Vigna siensis, and Arachis hypogaea is imported in domestic. In this study, inspection system is implemented to analyze CCMV accurately and rapidly by developing RT-PCR, nested PCR, and gene insertion positive control. It is expected that the method developed in this study will contribute to the plant quarantine to be consistently utilized in the field.

• The Journal of the Korea Contents Association
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• v.15 no.8
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• pp.408-415
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• 2015

This study investigated the job-satisfaction of the Radiographer's job-characteristics and job-stress. A total of 213 Radiographer were surveyed using a self-administered questionnaire. The 105 questionnaires consist of general characteristics, job characteristics, occupational stress, and job satisfaction. The job satisfaction was categorized into 3 sub-scales; psychological variables, environmental variables, and structural variables. The occupational stress was categorized into 8 sub-scales; physical environment, job demand, insufficient job control, interpersonal conflict, job insecurity, organizational system, lack of reward, and occupational climate. 30 years old than 30 years later, people are highly rewarding than a low person, this person is lower than people with high sense of duty, place the larger the size of Seoul, hospital than fat, than people who do not have turnover intention this, job insecurity, organizational structure, inadequate compensation, workplace culture, physical environment, people with low job satisfaction is higher than men were. As such there is a need to identify the cause because otherwise indicated differences in job satisfaction.

• Korean Journal of Health Education and Promotion
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• v.33 no.1
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• pp.13-22
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• 2016

Objectives: By using six years of KNHANES dataset (2008~2013) about 60 ages older people, we analyzed how the depression prevalence rate in the elderly is influenced by disease and activity limit. Especially, to add a sense of more reality, we adopted stress experience as a control variable to see how the depression prevalence rate in the elderly is influenced by disease and activity limit depending on the stress experience. Methods : We adopted six years of KNHANES dataset, indicating that our results were based on long period of time capable of considering temporal patterns in the depression prevalence rate in the elderly. Total 1,160 elderly people in KNHANES were selected for our empirical analyses. Dependent variable is either 0 or 1 depending on whether the elderly people feel depression. Main explanatory variables for our study include disease and activity limit. Logistic regression analysis was applied for two group such as stress experience and non-experience. Results : According to the empirical results, stress factor is found to be significant in explaining the depression in the elderly. Depression prevalence rate increased when the elderly has stress experience: chronical disease(OR=1.650), chronical disease with activity limit(OR=3.388), non-chronical disease with stress(OR=11.841) chronical disease with stress (OR=13.561) and chronical disease with activity limit and stress(OR=28.691). Conclusions: The finding suggest that the Countermeasures of elderly's depression alleviation should include stress management.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.12 no.2
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• pp.120-126
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• 2019

Recently, there is an increasing need for highly precise processing with the rapid development of precision machinery, electrical and electronics, and semiconductor industries. Cutting machine control relies on the operator's sense and experience in tradition, but it has been greatly enhanced by the adoption of CNC(Computerized Numeric Controller). In addition, cutting dynamics technology has been paid attention to reflect the operating state of machine in real time. This paper presents a method to detect and stabilize tool vibration by attaching an acoustic sensor to a CNC machine. The sensed acoustic data is synchronized with the tool position and the abnormal vibration frequency is separated from the collected acoustic frequency, then analyzed to detect the tool vibration. Also the reliability the tool vibration detection and stabilization is improved by applying the cutting dynamic method. The proposed method is analyzed and evaluated in terms of the surface roughness.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.8
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• pp.1483-1490
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• 2009

This parer is presented multiple path-planning of unmanned autonomous forklift using modified genetic algorithm and fuzzy inference system. There are a task-level feedback method and a method that path is dynamically replaned in realtime while the autonomous vehicles are moving by means of an optimal algorithm for existing multiple path-planning. However, such methods cause malfunctions and inefficiency in the sense of time and energy, and path-planning should be dynamically replanned in realtime. To solve these problems, we propose multiple path-planning using modified genetic algorithm and fuzzy inference system and show the performance with autonomous vehicles. For experiment, we designed and built two autonomous mobile vehicles that equipped with the same driving control part used in actual autonomous forklift, and test the proposed multiple path-planning algorithm. Experimental result that actual autonomous mobile vehicle, we verified that fast optimized path-planning and efficient collision avoidance are possible.

• Journal of Korea Multimedia Society
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• v.13 no.10
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• pp.1474-1486
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• 2010

In this paper, we propose an algorithm which represents the distance depiction technique of real painting that named "Aerial Perspective" in painterly rendering. It is a painting technique that depicts the attenuations of light in the atmosphere, and the scattering effect is changed by the distance, altitude and density of atmospheres. For the reflection of these natures, we use the depth information corresponding to an input image and user-defined parameters, so that user changes the effect level. We calculate the distance and altitude of every pixel with the depth information and parameters about shot information, and control the scattering effects by expression parameters. Additionally, we accentuate the occluding edges detected by the depth information to clarify the sense of distance between fore and back-ground. We apply our algorithm on various landscape scenes, and generate the distance-emphasized results compared to existing works.

• Journal of Digital Contents Society
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• v.15 no.1
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• pp.69-76
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• 2014

In this study, by using the control technique of the user using augmented reality technology, to provide a game system touch-based. The augmented reality technology, can be advantageously used vehicle is easily recognized as a technique for synthesizing (images, video, text) object of the virtual image of the real world. Augmented reality technology has been studied to make the application in various fields. Studies of natural marker-based marker and base are underway, but there is no sense of incongruity in reality research natural marker-based and has been studied much. By using the augmented reality technology natural marker-based In this paper, we implemented a game system. The system also has the advantage that can be absorbed in the game by using the techniques of the interaction through a user's touch. Touch interface-based, are available as well as user environments, even in mobile devices such as smart-phone and touch pad.