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만성골수성백혈병 환자에서 동종조혈모세포이식후 발생한 골수 외 재발 과립구육종 1예
박용현,김기원,박석영,이은희,김희정,계철승,이연수 대한조혈모세포이식학회 2001 대한조혈모세포이식학회지 Vol.6 No.1
Isolated extramedullary relapse without marrow involvement in patients with leukemia after allogeneic hematopoietic stem cell transplantation(aHSCT) is a rare occurrence. The underlying mechanisms leading to selective involvement of extramedullary sites and sparing of the marrow remain undefined. These might be due to relapse at sanctuary sites for the conditioning chemotherapy(CHT) and graft-versus-leukemia(GVL) effect. A 31-year-old women visited our hospital due to the pain on the right upper arm area developed several weeks ago. She was diagnosed with Philadephia chromosome positive chronic myelogenous leukemia(CML) and underwent aHSCT from HLA-matched sibling 6 months ago. There was no acute GVHD. Plain X-ray of right humerus showed some osteolytic lesion at midshaft area and isolated granulocytic sarcoma as extramedullary relapse was confirmed by pathologic findings with normal bone marrow. Polymerase chain reaction of varible number of tadem repeats (VNTR) of peripheral blood mononuclear cell revealed only donor type, but involvements of multiple bones and marrow developed 4 months later and finally she expired without a response to interferon-α(INF-α) and radiation therapy(RT). There have been some case reports which described extramedullary relapses in patients with leukemia after aHSCT, showing resistance against available therapeutic modalities such as donor lymphocytes infusion, CHT, RT and INF-α, etc. We agreed that the development of new therapeutic approach to this novel kind of sanctuary lesion should be required.
Magnetic Attachment와 Konus Telescopic Denture를 이용한 부분무치악 환자의 수복
계기성,박상현,이선아 조선대학교 구강생물학연구소 2002 Oral Biology Research (Oral Biol Res) Vol.26 No.2
Magnets have been investigated or used in clinical dentistry as retentive aids. The obvious advantages are that these attachments do not need special equipments and require frequent adjustment of replacement with those use, and they likely transmit less lateral forces to the abutment. Konus telescopic denture is double-crown type prosthesis composed by the inner crown and the outer crown. Major retention gains in stop-friction between the inner crown and the outer crown. Unparallelism of the inner crown wall products wedge-effect (Konuspassung). This is a clinical case of 65year old female with the partially edentulous area. We treated the Patient with removable Partial denture using konus telescope as a retainer in maxilla and removable partial denture using magnetic attachment as a retainer in mandible , The result was satisfactory, functionally and esthetically
Hyun-Il Kim,Woong Han,Woong-Ki Choi,Soo-Jin Park,Kay-Hyeok An,Byung-Joo Kim 한국탄소학회 2016 Carbon Letters Vol.20 No.-
In this work, the effects of maleic anhydride (MA) content on mechanical properties of chopped carbon fibers (CFs)-reinforced MA-grafted-polypropylene (MAPP) matrix composites. A direct oxyfluorination on CF surfaces was applied to increase the interfacial strength between the CFs and MAPP matrix. The mechanical properties of the CFs/MAPP composites are likely to be different in terms of MA content. Surface characteristics were observed by scanning electron microscope, Fourier transform infrared spectroscopy, and single fiber contact angle method. The mechanical properties of the composites were also measured by a critical stress intensity factor (KIC). From the KIC test results, the KIC values were increased to a maximum value of 3.4 MPa with the 0.1 % of MA in the PP, and then decreased with higher MA content.
계대곤,허필우,이경진,성우현,정철구,박영섭,이길송,이재수,강준기,최창락 대한신경외과학회 1992 Journal of Korean neurosurgical society Vol.21 No.12
Optic nerve glioma is rare tumor. Any confined intraorbital optic nerve glioma has not been previously reported. This report is a case of confined intraorbital optic nerve glioma for the first time found in a 17 year old female. A transfrontal orbital approach was used in order to determine the presence or absence of intracranial extension of tumor. CT and MRI were not sufficient for definite diagnosis of this condition. The presence of this rare type of tumor, confined to the intraorbital optic nerve, was confirmed by pathological study of intracranial optic nerve serial sections
박상현,허진경,계기성 조선대학교 구강생물학연구소 2003 口腔生物學硏究 Vol.27 No.1
The Purpose of this study was to measure and compare the gap distance between implant fixture and implant framework fabricated by three techniques; (1) one-piece casting technique. (2) at the same time soldering technique after casting. (3) at the different time soldering technique after casting. Four 3i (diameter 4.0 ㎜) implant fixtures were fixed in the stone block. Implant bar framework was completed with type 111 gold alloys after it was waxed up with wax sleeve. Implant bar framework was soldered after it was cut with 0.2 ㎜ gap distance and fixed with pattern resin. Gap distances between each implant fixture and abutment, each gap distances were measured by means of stereomicroscope and micrometer ruler. The results were as follows : 1. In comparison of gap distance between implant fixture and abutment, one-piece casting technique group was 531 ㎛, soldering at the same time group was 250 ㎛,soldering at the different time group was 46 ㎛. Therefore, marginal adaptation of soldering technique group was higher than one-piece casting technique group. And marginal adaptation of soldering at the different time technique was higher than soldering at the same time technique. 2. In comparison of distance between abutment and abutment, one-piece casting technique group was 44.100 ㎜, soldering at the same time technique was 44.064 ㎜, soldering at the different time was 44.059 ㎜ and there were not significant differences.
Surgical Management of Takayasu's Arteritis
Jin Hyun Joh,김덕경,Kay Hyun Park,김동익 대한의학회 2006 Journal of Korean medical science Vol.21 No.1
The results of surgical bypass and endarterectomy in Takayasu’s arteritis (TA) were reported to be poor compared to usual atherosclerosis patients. However, if ischemic symptoms due to occlusive disease were severe, surgical procedures were inevitable. We report surgical experience of 5 patients with TA. Five women (ranged from 26 to 58 yr) were operated between June 1998 and May 2004. Three patients showed occlusion of main branches of aortic arch and had symptoms of cerebral ischemia. One patient showed near total occlusion in the midabdominal aorta and had symptoms of orthopnea and uncontrolled hypertension. One patient showed total occlusion of abdominal aorta at the level of aortic bifurcation and had a symptom of severe claudication on both legs. Bypasses from the ascending aorta to the carotid artery were performed in 3 cases. Bypass from the thoracic aorta to the left common iliac artery was performed in one case and endarterectomy of abdominal aorta in one case. The ischemic symptoms related with arterial occlusion were resolved after surgery. And the symptoms of cardiac failure disappeared. The symptomatic TA frequently required arterial reconstruction. The symptomatic improvement and excellent mid-term patency could be expected after arterial reconstruction and endarterectomy
단일 급전부를 갖는 레이다 디텍터용 X, K 밴드 배열 안테나
주현모(Hyun-Mo Joo),박병철(Byung-Chul Park),계영철(Young-Chul Kay),이정해(Jeong-Hae Lee) 한국전자파학회 2012 한국전자파학회논문지 Vol.23 No.5
본 논문에서는 단일 급전부를 갖는 레이다 디턱테용 X 밴드(10.525 GHz) 1×2 배열 안테나와 K 밴드(24.15 GHz) 3×6 배열 안테나를 제안한다. 제안된 배열 안테나의 왼편에는 X 밴드 배열 안테나가 있고 오른편에는 K 밴드 배열 안테나가 있다. 두 개의 배열 안테나는 하나의 전송 선로를 통해 급전이 되고, stub가 각 배열 안테나의 앞부분에 있다. 서로 다른 동작 주파수를 갖는 배열 안테나를 일반적인 T-junction을 이용하여 하나의 전송 선로로 급전할 경우, 서로 영향을 주어 배열 안테나의 특성이 크게 바뀌게 된다. 이러한 영향을 차단하기 위해 open, short 특성을 이용하여 stub를 설계하였다. 먼저 각 배열 안테나에 stub가 연결되어도 안테나 특성이 바뀌지 않는 것을 확인하였고, 최종적으로 두 개의 배열 안테나를 연결하여 하나의 전송 선로로 급전을 하여도 성능이 바뀌지 않는 것을 확인하였다. 측정한 이득은 X 밴드에서 6.47 dBi, K 밴드에서 13.07 dBi로 시뮬레이션 결과와 잘 일치하였다. In this paper, the X(1×2, 10.525 GHz) and K(3×6, 24.15 GHz) bands patch array antenna having single feed line for radar detector applications is proposed. The left side of the proposed array antenna is X band array antenna and the right is K band array antenna. Two array antennas with two stubs located in the front of antennas are fed through one transmission line. If the array antennas which have the different resonance frequency are fed by one transmission line using general T-junction, it interferes each other and the array antenna lost its character. Therefore, to prevent these interferences, two stubs using open and short property of stub are designed. First of all, the performances of array antenna weren"t changed when each array antennas were connected with the stub and in the end, it is found out that it was the same when the two array antennas were combined and feed through the one transmission line. The measured gain at X band is 6.47 dBi and measured gain at K band is 13.07 dBi. The experimental results agree well with the simulated ones.
이현우 ( Hyun Woo Lee ),박희명 ( Hi Myung Park ),이시래 ( Si Rhae Lee ),이상규 ( Sang Kay Lee ) 대한내과학회 1972 대한내과학회지 Vol.15 No.5
A clinical observation was made on 29 cases of partial bilateral bundle branch block seen among 22, 054 cases for the past 14 years at the Kyungpook University Hospital. The overall incidence of partial bilateral bundle branch block was 0. 1 per cent. Amon