• 대한전자공학회논문지
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• 제27권11호
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• pp.69-76
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• 1990

자기 응력 계수의 변화에 따른 자기 버블의 등방성 전파 여부를 규명하기 위하여 자기 응력 계수가 거의 등방화(${\lambda}111{\simeq}{\lambda}100$) 된 세가지 버블 가네박막(AK92, AKa8, AKb1)의 바이어스 마진과 버블 소멸 자장을 $2.5{\mu}m$ 주기를 갖는 다이아몬드 패턴에서 측정하였다. 측정 결과 바이어스 마진은 각 박막의 경우 우수, 보통, 열등 회로에서 상당히 등방화된 값을 얻을 수 있었다. 버블 소멸 자장으로부터 회전 자장의 방향에 따른 버블 포텐셜 우물을 구하였다. 버블 포텐셜 우물로부터 자기 응력 이방성 정도를 나타내는 ${\Delta}(=({\lambda}111-{\lambda}100)/{\lambda}111)$값이 0.5인 AK92인 경우 우수, 보통, 열등 회로에서 버블 포텐셜 우물이 상당한 차이가 있는 반면 0.3인 AKa8과 0.1인 AKb1의 경우 각 회로에서 거의 등방화가 이루어진 것을 볼 수 있었다. 위의 두가지 측정 결과에서 ${\Delta}$값이 0.1~0.3일때 거의 등방적인 버블 전파가 일어남을 알 수 있었다.

• The Korean Journal of Pain
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• 제26권1호
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• pp.27-31
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• 2013

Background: Neuroplasty using a Racz catheter or epiduroscope and percutaneous endoscopic laser discectomy are performed as treatment for chronic refractory low back and/or lower extremity pain, but they are limited in that they cannot completely remove the causing pathology. Lately, epiduroscopic laser neural decompression (ELND) has been receiving attention as an alternative treatment, but there are insufficient reports of results. Hence we aimed to investigate and report the data in our hospital. Methods: Seventy-seven patients were selected who had received ELND via the anterior and posterior epidural approach through the pain clinic in our hospital from March 2011 to July 2012. Their medical records including age, diagnosis, epiduroscopic findings and degree of symptom relief were investigated. The degree of symptom relief following the procedure was categorized into 5 stages of very good (5), good (4), no change (3), bad (2), and very bad (1) at 2 weeks and 1 month after the procedure. Results: The subjects were 30 males and 47 females. Mean age was 54.6 for males and 59.6 for females, so the overall mean age was 58.1 years old, with the youngest being 23 and the oldest 88 years old. In epiduroscopic images of all patients, more than one situation of herniated disc, fibrous tissue and adhesion, or inflammation was observed. Sixty-seven patients (87.0%) showed symptom relief 2 weeks after the procedure and 63 patients (81.8%) showed relief after 1 month. Conclusions: ELND is considered to be an effective treatment alternative for chronic refractory low back and/or lower extremity pain, including lumbar disc herniation, lumbar spinal stenosis, and failed back surgery syndrome which cannot be alleviated with existing non-invasive conservative treatment.

• 농업생명과학연구
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• 제46권4호
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• pp.1-8
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• 2012

참나무류 견과는 야생동물들의 주요한 먹이자원이기 때문에 지리산국립공원(피아골, 빗점, 장당골, 뱀사골, 한신계곡, 칠선계곡)에서 2008년부터 3년간 참나무류를 대상으로 견과 생산량을 조사하였고, 지역별, 고도별, 사면별 결실특성을 분석하였다. 결실량의 많고 적음에 따라 조사지별로 다른 결실특성을 나타냈으며, 결실량이 많은 해에는 빗점과 장당골 지역이 가장 많은 결실량을 보였고, 결실량이 적은 해에는 빗점과 한신계곡의 결실량이 많은 것으로 나타났다. 고도별 특성에 따라 결실량이 많은 해에는 1000 m와 900 m, 결실량이 적은 해에는 800 m와 900 m에서 많은 결실량을 나타내었다. 또한 전 조사기간 동안 남사면이 북사면에 비해 많은 견과생산량을 나타내었다.

• The Journal of Korean Physical Therapy
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• 제13권2호
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• pp.421-431
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• 2001

It is important to maintain good habitual posture in daily life. Abnormal body aligament is provoked by excessive tension of bad posture. And these symptom is connected with other disorder of the body like back pain, cervical pain and shoulder pain through inaccurate body mechanism in daily life. This study was searched to figure out effects of factor that how to balance good posture and normal posture. And the other purpose of this study was to make new calculate device for analysis of effective posture in clinic.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 A
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• pp.231-234
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• 2003

This paper describes the structure, operation, image processing, and decision making techniques of a color machine vision system designed for the automatic sorting of soybeans. The system consists of feeder, conveyor belt, line-scan camera, lights. ejector, and a PC Unlike manufactured goods, agricultural products including soybeans have quite uneven features. The criteria for sorting good and bad beans also vary depending on inspectors. We tackle these problem by letting the system learn the inspecting parameters from good samples selected manually by a machine user before running the system for sorting. Real-time processing has another importance In the design. Four parallel DSPs are employed to increase the processing speed. When the designed system was tested with real soybeans and the result was successful.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2005년도 추계 학술발표회 제17권2호
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• pp.535-538
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• 2005

The problem of the crack which occures from the reinforced concrete structure. could be caused by the complexed factors. When the crack happen, it caused fatal blemish to manage and maintain the structure such as structural problem, licking, spalling, viewing Even though they study and work hard to solve this kind of problem in the world, there are no countermeasure for perfect prevention of crack. After the crack checked out, a method of repair-reinforcement has been sutdied and operated actively. In this experiment, studied durability of repair material. Experiment wave and durability of epoxy and urethane's were shown good result, and micro cement's durability displayed result that is not good. Result of a repeat tired experiment displayed result that micro cement is bad.

• 한국레이저가공학회지
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• 제3권2호
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• pp.53-61
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• 2000

On the laser weld production line, a slight alteration of the welding condition produces many defects. The defects are monitored in real time, in order to prevent continuous occurrence of defects, reduce the loss of material, and guarantee good quality. The measurement system is produced by using three photo-diodes for detection of the plasma and spatter signal in CO$_2$ laser welding. For high speed CO$_2$ laser welding, laser tailored welded blanks for example, on-line weld quality monitoring system was developed by using fuzzy multi-feature pattern recognition. Weld qualities were classified optimal heat input, a little low heat input, low heat input, and focus misalignment, and final weld quality were classified good and bad.

• 전기학회논문지
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• 제57권5호
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• pp.735-740
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• 2008

Recently, the research of PM (Preventive Maintenance) method on the RCM(Reliability-Centered Maintenance) of the system equipment is being actively advanced for a few years. For the most of the current power equipment maintenance, the state of the equipment after maintenance is assumed to be becoming 'as good as new ones' state. However, the state of the power equipment is maintained like the states of the between 'as good as new ones' and 'as bad as old ones' by imperfect maintenance that implies the life decrease of the equipment by frequent breakdown, the error of maintenance process, and so on. So, the Maintenance method considering the real case has to reflect Imperfect maintenance than perfect maintenance. This paper suggests the Preventive Maintenance method by using Quasi - Renewal Theory for the gas turbine equipment as deliberating the imperfect maintenance for the real cases.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 제39회 하계학술대회
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• pp.1545-1546
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• 2008

In this study, an image processing method with FRANSAC(Fuzzy RANSAC) is presented and discussed for the development of a microscopic gap measuring algorithm. Many problems in edge detection processing are mainly occurred by the illumination system. A serious problem is that the edge set of gap could include the error elements that have relatively larger error than normal. This problem leads to a incorrect measurement of gap. We present a gap measuring algorithm using FRANSAC[1] that is a representative robust estimation algorithm. FRANSAC is peformed by first categorizing all data into good sample set, bad sample set and vague sample set using a fuzzy classification and then sampling in only good sample set. Experimental results show that the presented gap measuring algorithm gives a higher accurate value of gap especially for the more noisy image data.

• 한국멀티미디어학회논문지
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• 제18권2호
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• pp.233-243
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• 2015

A hotspot is a spatial pattern that properties or events of spaces are densely revealed in a particular area. Whereas location information is easily captured with increasing use of mobile devices, so is not our emotion unless asking directly through a survey. Tweet provides a good way of analyzing such spatial sentiment, but relevant research is hard to find. Therefore, we analyzed hotspots of emotion in the twitter using spatial autocorrelation. 10,142 tweets and related GPS data were extracted. Sentiment of tweets was classified into good or bad with a support vector machine algorithm. We used Moran's I and Getis-Ord $G_i^*$ for global and local spatial autocorrelation. Some hotspots were found significant and drawn on Seoul metropolitan area map. These results were found very similar to an earlier conducted official survey of happiness index.