• The Journal of Korean Physical Therapy
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• 제25권2호
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• pp.76-80
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• 2013

Purpose: The objective of this study was to offer primary clinical data examining whether change of imaging structure and quantitative evaluation of muscle activity on myofascial trigger points can lead to implementation of an analytical technique for evaluation of myofascial pain diagnoses. In addition, we examined the effect of a variety of mediation techniques, in order to examine neuromuscular physiological characteristics of myofascial trigger points muscle by comparing differences in pressure pain threshold and ultrasound imaging. Methods: Participants in the study included 30 adults in their twenties. The subjects were divided into the normal and myofascial trigger points groups. Clinical outcomes were evaluated by pressure pain threshold for pain and ultrasound imaging was performed for evaluation of the structural characteristics of muscle. Independent t-test was used for statistical analysis. Results: The two groups showed statistical significance in the change in pressure pain threshold (p<0.05). Findings of ultrasound imaging analysis showed no significant differences, increased muscle thickness was observed (p>0.05). Findings of ultrasound imaging analysis showed significant differences, increased muscle echodensity was observed (p<0.05). Findings on ultrasound imaging analysis showed significant differences, increased muscle white area index was observed (p<0.05). Conclusion: From these results, active myofascial trigger points muscle showed quality deterioration on ultrasound imaging. Thorough evaluation of imaging structure and physiological characteristics can be useful quantitative analytical techniques for diagnosis of myofascial pain syndrome and a primary factor reflected in physical therapy intervention.

• 한국인터넷방송통신학회논문지
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• 제15권2호
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• pp.273-278
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• 2015

증가하는 전력 수요량을 충족시키기 위하여 송전 설비의 전기적인 용량이 커져야 한다. 고전력의 전기를 생산하고 전달하는 설비들은 대규모화될 뿐만이 아니라 높은 신뢰성으로써 동작하여야 한다. 따라서 전기설비가 안정상태에서 동작해야 한다는 것은 매우 중요한 과제이다. 고전력을 전달하기 위한 유일한 수단으로 체택되고 있는 케이블에서 전류에 의하여 줄 열이 발생하며, 열에 의하여 케이블 시스템의 열화가 발생한다. XLPE 케이블의 경우 $90^{\circ}$에서 30년 수명을 보장한다는 조건으로 제작, 설치 및 운영 되고 있으나, 실제 30 년 사용한 시점에서 수명이 종료될 것이라는 보장이 현재로서는 없는 상태이다. 이 논문에서 기존의 수명 이론을 바탕으로 활선 상태의 6.6 kV 케이블 9회선의 온도를 측정하고, 케이블의 온도와 수명의 상관관계를 파악하기 위하여 우리가 제작하여 (주)서부발전에 설치하여 운영하고 있는 장치를 소개한다.

• 대한임상전기생리학회지
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• 제8권1호
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• pp.23-29
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• 2010

Purpose : This study is to offer clinical primary data that examines the change of imaging structure and the quantitative evaluation of muscle activity on myofascial trigger points. This study examines neuromuscular physiological characteristic by comparing the differences in physical findings, pressure pain threshold, imaging, and electrophysiological characteristics in latent and active myofascial trigger points muscle and normal muscle through the following experimental procedures. Methods : The participants for the study were thirty-three adults in their twenties. We divided three groups into normal, latent and active myofascial trigger points groups by physical findings. We analyzed the results of measured pressure pain, threshold for pain, ultrasound imaging perform for structure characteristic of muscle, surface EMG according to type of muscle contraction for function of muscle contraction. Results : Significant differences were indicated in pressure pain threshold (p<0.05). Significant differences were discovered in the ultrasound imaging analysis. There were increases in muscle Echogenicity white area index (p<0.001). There were significant differences that decrease in %MVIC (p<0.05), increase in MDF (p<0.05). Conclusion : From these results, active rnyotascial trigger points muscle showed quality deterioration on ultrasound imaging and decreased function of muscle contraction, increased motor unit action potential of II type fiber, and electrophysiologically. Imaging structure and neuromuscular physiological characteristic can be diagnostic and quantitative analytical techniques for myofascial pain syndrome and a primary factor that reflected in physical therapy intervention.

• 한국터널지하공간학회 논문집
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• 제2권2호
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• pp.62-71
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• 2000

지하채굴작업에 의한 공동 및 폐갱 등은 지반침하 및 지표함몰현상의 주요 원인이 되며, 근접시공 지하구조물 또는 인근 구조물의 안정성 저해요소로 대두되고 있다. 이에 대한 대책방안으로 폐갱을 충진재로 채우는 보강시공을 수행하는 경우가 있으나 설계방법 및 안정성 해석방법이 미흡한 실정이다. 따라서 본 연구에서는 폐갱 등 지하공동에 의한 주변지반의 영향권을 수치적으로 분석하고 실제 수치해석 과정에서 주변 암반의 장기거동을 고려할 수 있는 방안을 제시하였다. 아울러 폐갱 인근의 구조적 안정성을 향상시키기 위하여 지하공동을 뒷채움재로 충진한 경우, 안정성 평가 및 암반의 거동을 수치적으로 분석할 수 있는 기법을 제시하였으며 불완전한 뒷채움재의 영향을 함께 고려하였다.

• Journal of Korean Neurosurgical Society
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• 제59권5호
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• pp.512-517
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• 2016

Objective : The pathophysiology of idiopathic Chiari malformation (CM) type 1 is disturbance of free cerebrospinal fluid (CSF) flow and restoration of normal CSF flow is the mainstay of treatment. Additional migration of the medulla oblongata in pediatric patients is referred to as CM type 1.5, but its significance in adult patients is unknown. This study is to compare surgical outcomes of adult idiopathic CM type 1.5 with that of type 1. Methods : Thirty-eight consecutive adult patients (M : F=11 : 27; median, 33.5; range, 18-63) with syringomyelia due to idiopathic CM type 1 were reviewed. Migration of the medulla oblongata was noted in 13 patients. The modified McCormick scale (MMS) was used to evaluate functional status before and one year after surgery. All patients underwent foramen magnum decompression and duroplasty. Factors related to radiological success (${\geq}50%$ decrease in the diameter of the syrinx) were investigated. The follow-up period was $72.7{\pm}55.6$ months. Results : Preoperative functional status were MMS I in 11 patients and MMS II in 14 of CM type 1 and MMS I in 8 and II in 5 of CM type 1.5. Of patients with MMS II, 5/14 patients in group A and 3/5 patients in group B showed improvement and there was no case of deterioration. Radiological success was achieved in 32 (84%) patients and restoration of the cisterna magna (p=0.01; OR, 46.5) was the only significant factor. Conclusion : Migration of the medulla oblongata did not make a difference in the surgical outcome when the cisterna magna was restored.

• IMMUNE NETWORK
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• 제7권2호
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• pp.87-94
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• 2007

Background: Chronic rhino-sinusitis and persistent allergic rhinitis is often cited as risk factor for developing adenoid hypertrophy or adenoiditis, but this relationship has not been studied extensively. In this study, we evaluated the mucosal barrier, squamous changes of ciliated epithelium, IgA secretion and BCL-6 expression in adenoids, and adenoid size. Methods: Six children with allergic rhinitis and sinusitis, nine children with only allergic rhinitis, nine children with only sinusitis and six children without any history of allergic rhinitis and sinusitis were enrolled. H-E stain of adenoid for squamous metaplasia, immunohistochemical study of adenoid for IgA and BCL-6, cytokeratin stain for evaluation of mucosal barrier and lateral view X-ray for adenoid size were performed. ANOVA test was used in the analysis and data showing p value of less than 0.05 were considered significant. Results: The number of ciliated cells had tendency to be decreased and squamous metaplasia had tendency to be increased in three experimental groups (p>0.05). Deterioration of mucosal barrier had tendency to be detected in three experimental groups than control group (p>0.05). BCL-6 had tendency to be increased and IgA secretion had tendency to be decreased in three experimental groups (p>0.05). There is no difference in adenoid size between three experimental groups and control group. Conclusion: Despite the expectation that adenoid would be affectecd by allergic rhinitis and rhino-sinusitis, we found no evidence for influence of adenoid immunity.

• 한국정보통신학회논문지
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• 제9권3호
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• pp.638-646
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• 2005

최근 무선통신시스템에서 직접변환 트랜시버 또는 IF 샘플링 SDR 기반 수신기가 일반적인 트랜시버 구조에 상응하여 설계되어지고 있다. 일반적인 AFC/APC 보상 회로가 기저 대역에서 RF 입력 신호와 국부발진 신호의 주파수 및 위상 오차를 보정할지라도 직접변환 수신 구조에서는 주요한 열화요소로 작용한다. 일반적인 보상 회로의 제한적인 동작 영역과 기저 대역에서의 1/Q 채널의 불평형을 용이하게 보상할 수 있도록 RF 입력 신호단에서 주파수 및 위상 오차를 보정하는 방법을 본 논문에서 제안한다. RF 입력단에서 고정된 주파수 및 위상 오차 이외에 변화하는 주파수 및 위상 오차를 제안된 early-late 보상기에 의해 효과적으로 보상할 수 있다. RF 입력단에서의 주파수 및 위상 오차의 보정으로 직접변환 수신기의 기저 대역에서의 기존 주파수 및 위상 오차 보정 회로는 간단히 설계할 수 있으며 미세한 오차 보정 구조로 용이하게 이용할 수 있다.

• 한국건설관리학회논문집
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• 제16권3호
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• pp.143-151
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• 2015

콘크리트 구조물에 발생하는 균열은 구조물의 내력, 내구성, 방수성 등 모든 기능을 저하시키는 주요한 원인으로, 그 대책의 필요성은 구조물이 존재하는 한 계속될 것이다. 하지만 콘크리트 구조물에서의 균열은 재료와 시공 및 사용환경, 구조적 요인 등 다양한 변수가 복합적으로 작용하고 있어 이에 대한 대책 마련과 사전 예방이 쉽지 않은 것이 현실이다. 이에 본 연구에서는 공동주택 외벽에서 균열이 발생한 사례를 분석하여 이에 대한 데이터베이스를 구축하고, 발생한 균열과 부재의 속성간의 관계를 상관관계를 도출하고자 한다. 이는 각 부재가 가지는 기본적 속성이 유사함을 고려하여 균열과 부재의 관계를 분석하고 부재의 속성을 검토하여 균열에 대한 대책 마련에 일조하고자 함이다.

• Ocean Science Journal
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• 제42권2호
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• pp.129-134
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• 2007

Increasing industrial development in the Masan Bay area of Korea over the past decades increased the risk for the survival of marine organisms in the bay area by the deterioration of the water quality. Since living organisms have the ability to adapt contamination-associated stimuli by the alteration of gene expression, changes in proteins can be used as an important criterion for assessing the levels of environmental conditions. In this study, therefore, alterations of the expression of proteins in the muscle of Limanda yokohamae from Dukdong and Dotsum in the bay area were surveyed and characterized as compared with Haegumgang, which served as a control site. The results demonstrated that the twenty spots detected from Dukdong and Dotsum were similar to each other. Fifteen proteins were found to be predicted or undefined proteins, while five proteins were identified as heavy polypeptide 11 of myosin, apolipoprotein A-I, fibroblast growth factor 17b precursor, G protein-coupled receptor kinase 1 b and bonnie and clyde. These data suggest that local fish in the bay area have dysfunction in muscle physiology including contraction, lipid metabolism, proliferation and differentiation and nervous system.

• 한국물환경학회지
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• 제26권1호
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• pp.61-70
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• 2010

The increase of impervious cover (IC) in a watershed is known as an important factor causing alteration of water cycle, deterioration of water quality and biological communities of urban streams. The study objective was to assess the impact of IC changes on the surface runoff characteristics of Kap Stream basin located in Geum river basin (Korea) using the Storm Water Management Model (SWMM). SWMM was calibrated and verified using the flow data observed at outlet of the watershed with 8 days interval in 2007 and 2008. According to the analysis of Landsat satellite imagery data every 5 years from 1975 to 2000, the IC of the watershed has linearly increased from 4.9% to 10.5% during last 25 years. The validated model was applied to simulate the runoff flow rates from the watershed with different IC rates every five years using the climate forcing data of 2007 and 2008. The simulation results indicated that the increase of IC area in the watershed has resulted in the increase of peak runoff and reduction of travel time during flood events. The flood flow ($Q_{95}$) and normal flow ($Q_{180}$) rates of Kap Stream increased with the IC rate. However, the low flow ($Q_{275}$) and drought flow ($Q_{355}$) rates showed no significant difference. Thus the subsurface flow simulation algorithm of the model needs to be revisited for better assessment of the impact of impervious cover on the long-term runoff process.