• Proceedings of the Korean Information Science Society Conference
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• 2005.11b
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• pp.349-351
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• 2005

자가 적응 시스템을 무인 시스템(UWS: Unmanned Weapon Systems)에 적용하기 위한 다양한 연구가 이루어지고 있다. 자가 적응 시스템은 임무중인 시스템이 다양한 주변 환경 및 시스템의 변화에 따라 능동적으로 시스템 또는 임무수행을 위한 전략을 주정해 항상 최상의 성능을 발휘할 수 있도록 하는 능력을 갖춘 시스템을 말한다. 자가 적응 시스템에서 능동적으로 변화시킨 시스템의 아키텍처나 임무수행 전략이 유효한 것인지에 관한 검증을 수행한 후 시스템에 적용해야 한다. 기존의 대부분의 자가 적응 시스템에 대한 연구결과에서는 능동적으로 변화된 시스템이 임무수행에 적합한지에 대한 검증 방법을 제시해 주고 있지 않다. 본 연구에서는 UWS의 자가 적응 시스템이 임무수행 중 변화 되었을 때 미래의 발생할 사건에 대해 적절하게 적용 가능한지를 검증하기 위하여 시간적인 사건의 완전성을 검증하기에 적합한 Computation Tree Logic(CTL) 모델체킹(Model Checking)을 적용하여 자가 적응 시스템의 적응결과를 검증하는 방법을 제시하였다.

• Journal of Korea Society of Digital Industry and Information Management
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• v.19 no.2
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• pp.47-55
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• 2023

Recently, Sensor technologies are emerging to prevent traffic accidents and support safe driving in complex environments where human perception may be limited. The UWS is a technology that uses an ultrasonic sensor to detect objects at short distances. While it has the advantage of being simple to use, it also has the disadvantage of having a limited detection distance. The LDWS, on the other hand, is a technology that uses front image processing to detect lane departure and ensure the safety of the driving path. However, it may not be sufficient for determining the driving environment around the vehicle. To overcome these limitations, a system that utilizes FMCW radar is being used. The BSD radar system using FMCW continuously emits signals while driving, and the emitted signals bounce off nearby objects and return to the radar. The key technologies involved in designing the BSD radar system are tracking algorithms for detecting the surrounding situation of the vehicle. This paper presents a tracking algorithm for designing a BSD radar system, while explaining the principles of FMCW radar technology and signal types. Additionally, this paper presents the target tracking procedure and target filter to design an accurate tracking system and performance is verified through simulation.

• Journal of Korean Public Health Nursing
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• v.26 no.3
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• pp.478-490
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• 2012

Purpose: The purpose of this study was to investigate the effects of oral exercise on oral function and quality of life among community-dwelling elders. Methods: This was a quasi-experimental study. Sixty four participants were recruited from the dental clinic of a public health center in G City, Gyeonggi-do. Thirty one participants were assigned to the experimental group and 33 to the control group. Participants in the experimental group performed oral exercise once a week for a period of three months. Subjects in the The control group received usual oral education. The Scores for oral function and quality of life were measured before and after the treatment. Data were analyzed using SPSS WIN 14.0. Results: After the experiment, statistically significant differences were observed between the two groups. were observed. The amount of saliva (p<.001), and the scores of for oral function (p<.001), and quality of life (p<.001) were higher in the intervention group compared to the control group. Conclusions: Oral exercise programs were effective in improving the oral function and quality of life among community-dwelling elders. Oral exercise could be an effective oral health nursing intervention for older people in the community.

• Asian-Australasian Journal of Animal Sciences
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• v.17 no.12
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• pp.1681-1688
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• 2004

Soaked and pasteurised wheat straw was inoculated with five species of Pleurotus fungi (coded P-21, P-30, P-41, P-60 and P-90), packed in polyethylene bags and incubated in a fermentation chamber for 21 days. The chemical composition, in vitro digestibility and in sacco degradability of the treated and untreated straw were estimated using a complete randomised design consisting of six treatments and four replicates. In a feeding trial, in vivo digestibility and voluntary intake were determined in bulls, using a $3{\times}3$change over design. Dietary treatments were: 1) untreated wheat straw (UWS) as control; 2) fungal treated (P-41) wheat straw before mushroom formation (FTWS); 3) spent wheat straw (SPWS) after mushrooms were harvested. Apart from P-90, fungal treatment significantly (p<0.05) increased the crude protein (CP) and reduced the cell wall components of the straw. The in vitro dry mater and organic mater digestibility significantly (p<0.05) increased in the treated straw particularly with the treatments of P-41 and P-60. The in situ degradability and in vivo digestibility of DM and OM were significantly (p<0.05) increased in treated straws with the highest values observed for treatment P-41. The intake of DM, OM and digestible organic mater (DOM) were significantly (p<0.05) increased in cows fed FTWS.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.2
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• pp.1031-1034
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• 2005

The beginning of Web Services was aware of efficient technology for application integration, thus it was used to integrating the distributed enterprise applications or the applications between business partners. But, recently the usage of Web Services is spreaded out not only internet applications but also wireless network applications. The main reasons are that Web Services is the international standard of W3C, and Web Services is based on XML that has the neutralized characteristics. Currently Major company of Web Services such as MS, IBM, etc. focus on the inte In this paper, we define and explain technical issues for adapting web services to ubiquitous Environment.

• Journal of Chest Surgery
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• v.33 no.3
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• pp.213-220
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• 2000

Background: Adhesion of leukocytes to myocardium or vascular endothelium has been known as an importation initial step in the ischemia-reperfusion injury which may affect the cardiac function. Therefore, leukocyte-depleted reperfusion may inhibit ischemia-reperfusion induced functional and ultrastructural deterioration. In this study, we quantified the time-dependent expression of the vascular cell adhesion molecule-1(VCMA-1) on piglet myocardium and demonstrated its relation to functional recovery using isolated piglet heart perfusion model. Material and Method: Neonatal(1 to 3 day old) piglet heart was harvested with 4$^{\circ}C$ University of Wisconsin solution (UWS) and presrved in the same solution for 12 hours. Ex vivo model of an isolated working neonatal piglet heart perfusion consisting of membrane oxygenator and roller-pump was used (Fig. 1). Hearts were grouped into leukocyte-non-depleted (group A, n=8) and leukocyte-depleted group(group B, n=8). In group B, hearts were reperfused with leukocyte-depleted blood using a leukocyte filter (Sepacell R, Asahi Medical, Japan). Segments of right atrium were taken before and after 1, 2, 3, and 4 hours of reperfusion for the evaluation of expression of VCAM-1. The intensity of immunohistochyemical satining of the VCAM-1 on the myocardium were graded semiquantitatively (0 to 4). For the evaluation of myocardial stroke work indices were calculated as well at the same time-points. Result: Mean expressins of VCAM-1 on the myocardium at 0, 1, 2, 3, adn 4 hours of reperfusion were 0.63, 1.44, 1.64, 2.65, and 3.34 in group A, while 0.56, 1.40, 1.50, 1.88 and 2.14 in group B (Fig. 3). Mean stroke work indices at 0.5, 1, 2, 3, and 4 hours after reperfusion were 1.35$\times$104, 1.32$\times$104, 1.14$\times$104, 0.81$\times$104, 0.68$\times$104 erg/gm in group A, while 1.40$\times$104, 1.43$\times$104, 1.43$\times$104, 1.28$\times$104, and 1.12$\times$104 erg/em in group B(Fig. 4). Conclusion : In this study, we demonstrated that leukocyte-depletion attenuated the expression of VCAM-1 during reperfusion and the time-dependent functional deterioration of the myocardium was well correlated with the degree of VCAM-1 expression.

• Journal of Oral Medicine and Pain
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• v.34 no.4
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• pp.363-369
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• 2009

Erosive oral lichen planus (EOLP) and recurrent aphthous stomatitis (RAS) are T-cell mediated inflammatory immune disorders. It was investigated mRNA expression pattern of several regulatory factors, such as, CD28, CD45, CD152, CD154, CD279, which influence T lymphocyte in unstimulated whole saliva (UWS) of EOLP and RAS patients. It was collected unstimulated whole saliva during 10 minute in EOLP 18 people, RAS patients 12 people, healthy control 8 people. We investigated mRNA expression of T lymphocyte regulatory factors, such as, CD28, CD45, CD152, CD154, CD279, with real time reverse transcription polymerase chain reaction. In EOLP group, CD45, CD279 expressed higher and CD154 expressed lower than control. In RAS, CD45, CD270 expressed higher and CD28, CD154 expressed lower than control. In addition CD152 salivary mRNA expression of EOLP is higher than that of RAS. The above results were suggested that the mRNA expression of T lymphocyte regulatory factors in unstimulated whole saliva of EOLP and RAS contributes to diagnosis of diseases.

• Journal of Aerospace System Engineering
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• v.17 no.6
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• pp.1-8
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• 2023

Research, such as developing alternative energy in the transportation field, including aviation, is being actively conducted to solve the issue of current climate change. Interest in ammonia fuel as a carbon free energy (CFE) source is increasing due to the ease of liquefaction and transportation and similarity in energy density to that of methanol. However, explosiveness and toxicity of ammonia make it difficult to handle. Therefore, in this study, stable ammonia production was attempted using relatively easy-to-handle urea water solution (UWS). High temperature steam was used to promote the hydrolysis of ammonia. In order to determine the causes for ammonia production below the theoretical equivalent ratio, it was suggested that there were not enough collisions to promote the hydrolysis based on the kinetic theory of gases. The hydrolysis of unreacted isocyanic acid (HNCO) was tested according to the change in water supply. As a result, an increased amount of ammonia produced was confirmed. The increased amount of ammonia produced in a certain section was dependent on the steam temperature and the flow rate of water supplied.