Implementation of Image Processing in Studying Contact Conditions of Overhead Contact Line‑Pantograph at 400 km/h

Kyung‑Min Na,이기원,김형철,조철진,박영 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.2

As an overhead contact line contacts the pantograph of an electric railway to supply electricity, it is operated after its electrical and mechanical safety features are examined. This study investigates a technology for examining the contact condition between the pantograph and the overhead contact line by using image processing. Contact condition images between the pantograph and the overhead contact line were obtained using a video device installed on the roof of a train, and the contact condition was tested between Iksan Station and Jeongeup Station of the Honam high-speed railway in the velocity range of 100–400 km/h. Images between the pantograph and the overhead contact line were used to recognize the feature points of the pantograph, and the moving displacement of the contact strip was detected using a Hough transform. The detected displacement was represented as a frequency through the zero crossing and a Fourier transform, and then its relationship with the arcing between the overhead contact line and the pantograph was analyzed.

정신분열증 환자의 저나트륨혈증에 의한 rhabdomyoysis 1 예

김경현,장우영,김성훈,김호중,전대원,나경선 대한내과학회 2000 대한내과학회지 Vol.59 No.3

Electrolyte disturbance that can produce rhabdomyolysis include hyperosmolar states, especially with marked hyperglycemia, or hypernatremia, severe hypokalemia, and hypophosphatemia, which is commonly seen in alcholics. Hyponatremia, however, is often an unrecognized initiating factor of rhabdomyoplysis. A 56-year-old man, treated for schizophrenia, developed severe hypotonic hyponatremia (Na:117meq/L) with mental change after several days of compulsive water drinking. Rhabdomyolysis quickly followed with high serum creatine phosphokinease level and myoglobulinuria. Massive hydration and urine alkalization started. Renal failure or compartment syndrome did not complicated. Hyponatremia may cause reduced rate of entry of sodium ions ,and reduces the exchange for calcium ion we thought elevated calcium concentration activated neutral proteases and lipases that serve to destroy the cell.(Korean J Med 59:335-338, 2000)

어린이집 교사와 유치원 교사의 장애유아 통합에 대한 신념과 실제 및 욕구 분석

전한나(Jun, Han-Na),조윤경(Cho, Youn-Kyung) 한국유아교육·보육복지학회 2010 유아교육·보육복지연구 Vol.14 No.1

장애아에 대한 무상 교육 및 보육 정책에 따라 장애 영유아들이 점차 더 많이 일반기관에 통합되어 교육과 보육 서비스를 받고 있음에도 불구하고, 통합을 위한 체계적인 지원이나 프로그램 운영 지침이 없어서 담당 교사들은 장애 영유아를 보육(교육)하는 데, 즉 통합 실행에서 어려움을 겪고 있다. 본 연구는 서울특별시 및 경기 지역에 소재하고 있는 44개 기관에서 317명의 교사(어린이집 교사 162명, 유치원 교사 155명)를 중심으로, 장애아 통합 실행에 주요 영향 요인인 통합에 대한 교사의 신념과 실제를 어린이집과 유치원 교사를 비교해 보고, 교사변인에 따른 장애아 통합에 대한 인식 차이를 살펴보았다. 또한 교사의 통합 신념 및 실제에 주요 영향 요인인 현직 연수 욕구 종류와 형태도 알아보았다. 본 연구의 결과를 요약하면 다음과 같다. 첫째, 통합교육 및 통합보육에 대한 일반적인 신념에는 어린이집 교사가 유치원 교사보다 더 높은 것으로 나타났다. 둘째, 통합교육 및 통합보육에 대한 실제에 차이에는 유치원 교사가 어린이집 교사보다 높게 나타났다. 셋째, 재직 연수에 있어서 어린이집 교사의 경우 재직연수가 6년 이상 되는 집단에서 통계적으로 유의미한 차이를 나타냈고, 학력이 높을수록 장애아 통합에 대한 인식이 높은 것으로 나타났다. 통합경험과 연수경험에 따라 장애아 통합에 대한 교사의 신념과 실제에서 유의한 차이를 나타냈다. 넷째, 어린이집 교사와 유치원 교사가 통합교육 및 통합보육에 대한 이해와 전문성을 향상시키기 위해 필요한 현직연수 내용은 장애아 진단 및 평가, 행동지도, 부모 및 전문가와 협력하기 순으로 나타났고, 연수 형태는 개별적인 지원, 소그룹 지도, 오프라인 워크숍 등의 실질적인 지원을 요구했다. Due to education policy changes, increasing numbers of young children with special needs are attending inclusive programs. Teachers in these settings need to have corresponding beliefs and skills so that young children with special needs can succeed with their peers. And it is critical to the success of inclusion efforts to continue to build a knowledge base about teachers’ abilities and training needs in this area. So this study is intended to explore the beliefs, skills, background causes and training needs of the child care and education and Pre-K teachers regarded as the importantaffecting factors in preschool inclusive implementation. The data were collected the background informations, beliefs, skills, and training needs with two group teachers. In this study, the 162 child care and education teachers and 155 Pre-K teachers were participated in Seoul and Kyung-gi Do area. The results of this study were as followed. First, in beliefs, the child care and education teachers showed the higher than the Pre-K teachers. Second, in skills, the Pre-K teachers showed the higher than the child care and education teachers. Third, in background causes, the academic attainments, the experiences of inclusive education and the amount of inservice training yielded different results. Fourth, to provide optimal inclusive education, teachers wanted the inservice training in assessment and evaluation of children with special needs, behavior management, and corporation with family and other practitioners. They wished to receive the inservice training by individual support, small group guidance, and off-line workshop. Based on these results, implications for policy, practice and research were discussed.

Intra-renal slow cell-cycle cells contribute to the restoration of kidney tubules injured by ischemia/reperfusion

Jinu Kim,Jee In Kim,Yeon Kyung Na,Kwon Moo Park 대한해부학회 2011 Anatomy & Cell Biology Vol.44 No.3

Renal epithelial cells damaged by ischemia/reperfusion (I/R) can be restored by timely and appropriate treatment. Recent studies have reported that intra renal adult kidney stem cells contribute to the restoration of tubules damaged by I/R. Here, we determined the role of adult tubular cells in the restoration of damaged tubules. We labeled slow cell-cycle cells (SCCs) with 5-bromo-2’-deoxyuridine (BrdU) and investigated their location in the kidneys as well as their contribution to the restoration of tubular cells damaged by I/R injury in mice. Thirty minutes of bilateral ischemia resulted in severe disruption of tubular epithelial cells along with a decline in renal function. The post-ischemic disruption of tubular epithelial cells was most severe in the S3 segment of the outer stripe of the outer medulla. Damaged tubules demonstrated gradual recovery of renal function over time. BrdU-labeled SCCs were mainly observed in tubules located at the junction of cortex and outer medulla, as well as in the inner medulla. The tubular SCCs expressed functional tubule cell markers such as Na/K-ATPase, Na-K-Cl cotransporter-2, and aquaporin 1 and 2. BrdU-labeled SCCs survived I/R injury and proliferated. These results demonstrate that SCCs present in tubules contribute to the restoration of tubular epithelial cells injured by I/R.

De novo Hyponatremia in Patients Undergoing Peritoneal Dialysis: A 12-month Observational Study

( Hyun Hee Lee ),( Soo Jung Choi ),( Heon Nam Lee ),( Sun Young Na ),( Jae Hyun Chang ),( Woo Kyung Chung ),( Se Joong Kim ) 대한신장학회 2010 Kidney Research and Clinical Practice Vol.29 No.1

Purpose: Hyponatremia occurs infrequently in patients undergoing peritoneal dialysis (PD). Nevertheless, one must understand its pathophysiology, since the therapeutic strategy differs from that of non-PD-related hyponatremia. This study examined the clinical features of hyponatremia in PD and evaluated the factors that may contribute to its development. Methods: We retrospectively enrolled 51 normonatremic PD patients at Gachon University Gil Hospital, South Korea. Using the plasma sodium levels at month 13, the patients were divided into hyponatremia (Na+<135mEq/L) and normonatremia (Na+≥135mEq/L) groups. Then, the clinical variables of these patients were examined, including peritoneal function and adequacy tests, and biochemical parameters. Results: The de novo hyponatremia (n=8) and normonatremia (n=43) groups had no significant differences in baseline characteristics. At month 1, the serum albumin was lower in the hyponatremia group (p=0.022). In the peritoneal equilibration test analysis, the dialysate-to-plasma ratio for creatinine (D/Pcr) measured after 13 months differed significantly between the two groups (p=0.007), while the maximum dip in sodium did not differ. No significant differences were observed in the normalized protein equivalent of nitrogen appearance, Kt/V, or residual renal function. Conclusion: Our data suggest that the development of hyponatremia is associated with a lower initial serum albumin level and increased D/Pcr in patients undergoing PD. Therefore, the serum sodium levels should be monitored more carefully in these patients.

한열변증에 따른 중풍 환자의 제반특성 비교

김민경,이인환,신애숙,김나희,김혜미,심소라,나병조,조승연,박성욱,정우상,문상관,박정미,고창남,조기호,김영석,배형섭,Kim, Min-kyung,Lee, ln-whan,Shin, Ae-sook,Kim, Na-hee,Kim, Hye-mi,Shim, So-ra,Na, Byung-Jo,Cho, Seung-yeon,Park, Seong-uk,Jung, Woo Sang 대한중풍순환신경학회 2010 대한중풍.순환신경학회지 Vol.11 No.1

Object : This study was conducted as part of the national project to standardize stroke diagnosis in Korean medicine. In this study, we aimed to evaluate the characteristics of acute stroke between heat pattern group and cold pattern group. Methods : We recruited stroke patients from 5 universities(Kyung-Hee University oriental medical center, Kyung-Hee University East-West Neo medical center, Kyungwon university lncheon oriental medical center, Kyungwon university Songpa oriental medical center and DongGuk university llsan oriental medical center) from April, 2007 until February, 2010. We diagnosed them and selected 463 heat pattern patients and 182 cold pattern patients. Results : We find that the risk factor of smoking, alcohol, diet(prefer to meat) are more associated with the heat pattern group. On the other hand, inflammation history in recent 3 months and diet(prefer to sea food) are more associated with the cold pattern group. RBC, Hg, Hct, TG, CK and Cl are more related to the heat pattern group. CPT, total cholesterol and HDL are more related to the cold pattern group. Tae-eum type takes high distribution of the heat pattern group, and So-eum type takes high distribution of the cold pattern group. Conclusions : This study provides evidence that the heat pattern group have more risk factor than the cold pattern group.

결장직장암 환자의 임상적 고찰 : 조선대학교 부속병원의 10년 간의 결과

나은종,문성표,장정환,김권천,민영돈,김성환,조현진,김정용,김경종 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.2

Background and Objectives: The colorectal cancer rates 4th in the total cancer prevalence in Korea. The clinical patient demographics were considered with the incidence rate of the colon and rectal cancer. The clinicopathological factors were analyzed for the 5 year survival rate. Materials Methods: Of the 282 patients who were operated from Jan. 1, 1992 to Dec. 31, 2001 and diagnosed by pathological biopsy as colo-rectal cancer, 234 patients were followed up. The age, sex, location of the cancer, TNM stage, operation method, histopathological classification, metastatic region, complications after operation and the survival rate were investigated. Results: Of the 234 patients, male and female consisted of 120 cases (51.3%) and 114 cases (46.7%), with an average age of 61.6 years. The average follow up period was 52.3 months and the peri operative mortality was 5.6%. The site of the cancer was most frequent at the rectum with 127 cases (54.3%). The patients were classified according to the TNM stages with 38 cases of stage 1 (16.2%), 98 cases of II (41.9%), 72 cases of III (30.8%) and 26 cases of IV (11.1%). The 5 year survival rate in the age group older than 50 was 63.3 % and 73.5% in the group younger than 50. In regard to the operation type, the 5 year survival rate was 65.4% for elective operation and 65.8% for emergency operation. The 5 year survival rate for well differentiated, moderately differentiated, poorly differentiated cancer, and mucinous adenocarcinoma was 73.7%, 60.2%, 58.3%, and 92.6%, respectively. The 5 year survival rate of each of the TNM stage is 81.1%, 74.8%, 57.0%, and 11.5% for Classes I, II, III, and IV, respectively. Conclusion: The clinical factors were analyzed for the 5 year survival rate with no statistical significance for the age, sex, and location of the cancer. The TNM stage and histopathological differentiation were statistically significant. The colon cancer showed better prognosis compared to the rectal cancer.

무용인을 위한 자기평가식 프로파일링에 관한 연구

나경아 한국무용연구회 2006 한국무용연구 Vol.24 No.1

무용인들은 신체적 기량을 중요하게 생각하기 때문에 모든 문제를 강도 높은 신체 훈련으로 해결하려는 경향이 있다. 그러나 자신의 부상이나 슬럼프에 관련된 근원적인 이유를 인식하게 된다면 동기유발은 물론 건강하게 무용을 하는데 도움이 된다. 이 연구에서는 자발적이고 체계적인 훈련을 위해 무용수행에 영향울 주는 심-신 요인들을 스스로 평가하여 문제를 인식하게 하는 자기평가식 프로파일 항목과 그 활용방안을 제안하였다. 프로파일은 신체적 요인과 심리적 요인으로 나누었으며, 신체적 요인에는 신체정렬, 무용상해, 테일러의 공연태도 프로파일링, 동작기술 요인을 제시하였다. 심리적 요인에는 동기, 성격, 테일러의 공연태도 프로파일링, 그리고 에포트쉐입 분석을 제시하였다. 자기평가 프로파일링은 자기치료, 자기조절학습 뿐 아니라 체계적인 훈련프로그램을 발전시키려는 교사와 지도자들을 위한 유용한 안내서 역할을 할 것이다. Physical abilities and skills are the main focus for dancers who believe all the problems related performance will be solved by just hard training. But if they find out the psychological reasons of their injury and slump, they would get higher motivation and health. In this studies, self-assessment profiling is divided two groups which are physical and psychological factor. In the physical factor, there are body alignment, dance injury, Taylor's performing attitude profiling and movement skill. In the psychological factor, there are motivation, character, Taylor's performing attitude profiling and effort-shape analysis. It will be a useful guideline for dancers and teachers who want to develope systematic training program.

靑色 사파이어의 熱處理와 分光學的 特性

나경주,김원사,김문영,배인국,장영남 충남대학교 기초과학연구소 1994 연구논문집 Vol.14 No.-

For the blue sapphires from Santung, China, the color change before and after has been investigated by UV-Visible spectrophotometry method. The blue sapphires from Shantung show four groups of absorption bands: the bands A (374, 386 and 450 ㎚) being attributed to single Fe^3+ ion, the band B (560, 579 and 704 ㎚) to Fe^2+/Ti^4+ pairs, the band C (∼800 ㎚) to Fe^2+/Fe^3+ pairs, and the D (528 ㎚) to Ti^3+ dd transitions. From those UV-VIS characteristics the origin of blue color of the sapphires is confirmed to be attributed by the factors such as Fe^2+/Fe^3+ and Ti^3+/Ti^4+. The absorption spectra of natural blue sapphires before and after heat treatment show distintive features, comparing with those of sapphires from other localities: the bands of 689 ㎚ and of Cr^3+ are not recorded on the spectra of sapphires from Shantung. The band (492 ㎚), which resulted from Ti^3+, is not shown and the intensity of the band 528 ㎚ decreases after the heat treatment. Decoloration of ink-blue sapphires are found to be successful by heat treatment with the control of annealing and atmosphere. During the diffusion process the excess components of impurities contained originally in the host crystal were expelled to the surface of crystals, enhancing the transparency of the crystals noticeably.

莞島邑 長佐里 堂祭의 調査報告와 世界像 考察

羅景洙 全南大學校 人文科學硏究所 1991 용봉인문논총 Vol.20 No.-

The Jangjwa-ri, the town of Wando is a region where Chonghaejin of Admiral Jangbogo located in the era of unified Silla. As long history prove it, remains abound around here, inhabitants think to be proud of theirs histrory. Inhabitants of this village have been celebrated Dang rites (village ritual) in the 15th day of January every year. There is Dngjib in the island named Jangdo front village. Their celebrate village ritual to the ancestral tablet socalled Adminal Songjing, Adminal Jongnyun, and Saint Hyuil there. Among gods of Dang, Adminal Songjing is the chief god, and Adminal Jongnyun, Saint Hyuil are the deputy gods. Adminal Jongnyun was the suborinate of Adminal Jangbogo, Saint Hyuil was a monk in the Koryo dynasty. But Adminal Songjing had been not made clear historically who he was. Merely following oral tradition, he was adminal of Sambyulcho in Koryo dynasty. But shouldn't belive it as a fact, we induce Songjing is nickname of Jangbogo. Although this village ritual celabrate figure gods who were deeply related to this region, it is celabrated by the way of folk-religion unlike religious rite of Confucianism. Therefore folkmind is projected in the village ritual of Jangjwa-ri. I want to chang it in terms of Weltbild folkmind projected in village ritual. Weltbild projected in this village ritual is two kinds. One is New Year ritual, the other is secularism.