30% 과산화수소를 함유한 전문가 미백제의 효용성 평가

김신영,박재억,김창현,양성은 大韓齒科保存學會 2010 Restorative Dentistry & Endodontics Vol.35 No.1

30% 과산화수소를 함유한 전문가 미백제인 레메화이트(Remewhite, Remedent Inc., Deurle, Belgium)를 시험군 피험자 31명, 시험용 미백제에서 과산화수소를 제외한 동일한 제재를 대조약으로 대조군 피험자 31명에게 1일 3회씩, 2차례에 걸쳐서 시행하였다. 미백의 임상적 효용성은 Colorimeter, Vitapan classical shade guide를 이용하여 전체 색변화량(□E*)을 측정하였다. 14주 후와 26주 후의 색변화량을 측정하여 군 간 색변화량을 비교하였고, 각 군 내에서의 색변화량도 비교하여 다음과 같은 결론을 얻었다. 1. Colohmeter를 이용한 평가시에 시험군에서 전체 색변화량(□E*)은 대조군에 비해 통계적으로 유의한 차이를 보였고, Vitapan classical shade guide를 이용한 평가시에는 통계적으로 유의한 차이를 나타내지 않았다(p < 0.05). 2. 시간이 지남에 따라 색 복원 현상이 나타남에도 불구하고 미백 시행 14주 후와 26주 후에도 미백의 효과가 유지된다고 할수 있다. 3. Colohmeter를 이용한 평가시에 Vitapan classical shade guide를 이용한 평가시보다 작은 색변화량을 더 정확하게 측정할 수 있다. This study evaluated the efficacy of an office bleaching gel (RemeWhite, Remedent Inc., Deurle, Belgium) containing 30% hydrogen peroxide. 31 volunteers were recieved office bleaching with the RemeWhite for 3 times at one visit, total 2 visits. As control group, the same gel in which hydrogen peroxide was not included was applied to 31 volunteers with the same protocol. The shade change (□E*, color difference) of 12 anterior teeth was measured using Colorimerter and Vitapan classical shade guide. The shade change of overall teeth in the experimental group was significantly greater than that in the control group which was measured using Colorimeter. There was also a significant difference between baseline and 14 weeks or 26 weeks though color rebounding phenomenon occurred as time went by. Small shade change difference can be measured accurately using Colorimeter than using Vitapan classical shade guide.

골격성 Ⅲ급 부정교합자의 두개안면형태에 대한 하악이부의 형태 및 하악절치의 위치에 대한 연구

김성식,박재억,손우성 대한치과교정학회 1998 대한치과교정학회지 Vol.28 No.5

골격성 Ⅲ급 부정교합자의 두개안면골격형태가 하악이부형태와 하악전치의 위치에 미치는 영향을 알아보고자 연구를 시행하였다. 전후방적인 악골부조화가 나타나지 않고 교정치료의 경험이 없는 만 20세 이상의 성인남녀(정상군)와, 하악전돌의 악골부조화를 보이며 교정치료의 경험이 없는 만 20세 이상의 성인남녀(하악전돌군)를 비교하여, 두개안면골격형태에 따른 하악이부형태와 하악전치의 위치에 관하여 다음과 같은 결론을 얻었다. 1. 두개안면골격형태의 비교에서 하악에 관련된 ∠SN-Mn, ∠FMA, ∠Pal-Mn, ∠LFH은 하악전돌군이 정상군에 비하여 크게 나타났지만, (p<0.05) 상악에 관련된 항목은 차이를 나타내지 아니하였다(p>0.05). 2. 하악전치를 둘러 싸고 있는 치조돌기는 하악전돌군이 정상군에 비해서 수평적으로 좁고, 수직적으로 긴 형태를 나타내었다(p<0.05). 하악이부의 형태에서도 수평적으로는 하악전돌군이 정상군에 비해서 좁게 나타났으나, 수직적으로는 차이를 나타내지 아니하였다(p>0.05). 3. 하악전돌군의 두개안면골격형태와 이부계측항목과의 상관관계에서 두개저와 하악하연에 기인하는 수직적인 악골부조화가 증가할수록 LaABH, LiACBW, LaACBW, LiABBW, SW, ∠LISA가 감소하는 역상관계를 나타냈지만(p<0.05), 전후반적인 악골부조화와는 별다른 상관관계가 나타나지 않았다(p>0.05). 4. 하악전돌군에서 수직적인 두개안면골격형태를 나타내는 ∠SN-Mn, ∠FMA, ∠Pal_Mn, ∠LFH와 하악이부의 계측항목인 ∠LiACBW. LiaBBW, SW, ∠LISA사이에 높은 상관관계가 존재하여, 수직적인 악골부조화로 하악이부의 형태와 하악전치의 경사도를 예측할 수 있었다(p<0.001). The purpose of this study was to evaluate the morphology of mandibular symphysis and location of lower incisor under the influence of the craniofacial skeleton in skeletal Class III malocclusion. The sample consisted of 132 adults who have severe Class III malocclusion (prognathism group, 33 males and 33 females), and who have normal occlusion (normal group, 33 males and 33 females). They had not received any orthodontic treatment or orthognathic surgery. The lateral cephalograms were evaluated. The results were as follows: 1. Prognathism group were larger than normal group in comparison of facial skeleton (p<0.05) with the exception of ∠FH-Pal, ∠SNA. 2. In the morphology of symphysis, measurements of anteroposterior width(LaABBW, LiABBW, SW) of prognathism group were significantly less than that of normal group(p<0.001). 3. In the correlative analysis between the craniofacial skeleton and symphysis measurements of prognathism group, vertical measurements in relation with cranial base and mandibular plane showed reverse correlationship with anteroposterior with of symphysis(LiACBW, LaACBW, LiABBW, SW)(p<0.05). But, there was not distinct difference between horizontal skeletal measurements and symphysis measurements(p>0.05). 4. The probability by regression test between vertical measurements(∠SN-Mn, ∠FMA, ∠Pal-Mn, ∠LFH) and symphysis measurements(LiACBW, LiABBW, SW, ∠LISA)were very high(p<0.001).

무선 센서 네트워크를 위한 에너지 인식 하이브리드 클러스터링

한욱표,김승남,이제현,정영준 강원대학교 정보통신연구소 2007 정보통신논문지 Vol.11 No.-

Many studies for the efficient utilization of node energy in wireless sensor networks has been done because sensor nodes operate with limited power based on battery. Existing cluster structure has problem that energy consumption is unbalanced because energy consumption is concentrated in cluster head. And in case distribution density of sensor node is low, the energy efficiency is declined because only a few members exist in cluster. In this paper, we submit an hybrid clustering mechanism to construct topology by mixing cluster structure and mesh structure selectively according to distribution of sensor nodes to improve energy efficiency. And we attempt to derive balanced energy consumption by selecting cluster head considering residual energy of each node. The performance of the proposed mechanism has been examined and evaluated with the NS-2 simulator in terms of network lifetime and end-to-end delay.

의미 분석 단계에서의 정보 흐름 제어

조현욱,김명수,정은환,유재휘,윤병주 명지대학교 공학기술연구소 1986 공학기술연구소 논문집 Vol.1 No.-

One of protection methods for computer internal data is to pursue data flow in program and to control its flow. In this thesis, we propose a mechanism which guarantees secure information flow in a program. By investigating security classes of all the variables in a statement and judging necessary condition for secure information flow, proposed model descriminates the program whether it is secure or not. Out model can be implemnted at language translation time, particularly semantic analysis phase, by pursuing security class transfer of each statement.

A nomogram predicting the risks of distant metastasis following postoperative radiotherapy for uterine cervical carcinoma: A Korean radiation oncology group study (KROG 12-08)

Je, Hyoung Uk,Han, Seungbong,Kim, Young Seok,Nam, Joo-Hyun,Kim, Hak Jae,Kim, Jae Weon,Park, Won,Bae, Duk-Soo,Kim, Jin Hee,Shin, So Jin,Kim, Juree,Lee, Ki-Heon,Yoon, Mee Sun,Kim, Seok Mo,Kim, Ji-Yoon,Y Elsevier 2014 Radiotherapy and oncology Vol.111 No.3

<P><B>Abstract</B></P> <P><B>Purpose</B></P> <P>To develop a nomogram predicting the risks of distant metastasis following postoperative adjuvant radiation therapy for early stage cervical cancer.</P> <P><B>Materials and methods</B></P> <P>We reviewed the medical records of 1069 patients from ten participating institutions. Patients were divided into two cohorts: a training set (<I>n</I> =748) and a validation set (<I>n</I> =321). The demographic, clinical, and pathological variables were included in the univariate Cox proportional hazards analysis. Clinically established and statistically significant prognostic variables were utilized to develop a nomogram.</P> <P><B>Results</B></P> <P>The model was constructed using four variables: histologic type, pelvic lymph node involvement, depth of stromal invasion, and parametrial invasion. This model demonstrated good calibration and discrimination, with an internally validated concordance index of 0.71 and an externally validated c-index of 0.65. Compared to FIGO staging, which showed a broad range in terms of distant metastasis, the developed nomogram can accurately predict individualized risks based on individual risk factors.</P> <P><B>Conclusions</B></P> <P>The devised model offers a significantly accurate level of prediction and discrimination. In clinical practice it could be useful for counseling patients and selecting the patient group who could benefit from more intensive/further chemotherapy, once validated in a prospective patient cohort.</P>

Research of V2I Situated Cognition System based on LiDAR

Je-Uk Lee,Jae-Hwan Kim,Bok-Joong Yoon,Jung-Ha Kim 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10

The purpose of this research was to study about the traffic accident prevention and the efficient traffic flow control with targeting the accident prone areas. The object interval was limited to the school zone, the curve zone and the intersection. The main sensors used the LiDAR. It was equipped into the vehicle and the infrastructure. It cognized the environment of object interval. The environment information which was cognized at the vehicle and the infrastructure was sent to the infrastructure server through the Ethernet. The sensor recognized comprehensive road situation. Finally it sent the safe driving command value to each vehicle on the basis of the recognized environment information.

A 10-year clinical outcome of radiotherapy as an adjuvant or definitive treatment for primary tracheal adenoid cystic carcinoma

Je, Hyoung Uk,Song, Si Yeol,Kim, Dong Kwan,Kim, Yong-Hee,Jeong, Seong-Yun,Back, Geum Mun,Choi, Wonsik,Kim, Su Ssan,Park, Seung-Il,Choi, Eun Kyung BioMed Central 2017 Radiation oncology Vol.12 No.-

<P><B>Background</B></P><P>To evaluate the role of radiotherapy (RT) as an adjuvant or definitive treatment in primary tracheal adenoid cystic carcinoma (ACC) for local tumor control and survival.</P><P><B>Methods</B></P><P>A retrospective chart review was performed in 22 patients treated with adjuvant or definitive RT for primary tracheal ACC at a single center between November 1994 and December 2008.</P><P><B>Results</B></P><P>Thirteen and 9 patients received adjuvant and definitive RT, respectively. Microscopic residual disease after surgery was pathologically reported in 11 patients. The median RT dose was 59.4 Gy for adjuvant and 74.4 Gy for definitive RT. The overall response rate for definitive RT was 77.8%. Six patients in the definitive RT group exhibited local progression (LP), whereas 14 patients in both groups exhibited distant metastasis. The most common recurrence site in cases of treatment failure was the lung parenchyma. The median follow-up duration was 123 months, and the 10-year overall survival (OS) rate was 54.2%. Although LP was the most common cause of death (4 patients), two-thirds of the patients treated with definitive RT lived for >5 years. The 5-year and 10-year LP-free survival (LPFS) rates in the definitive RT group were 66.7 and 26.7%, respectively. Patients with higher RT dose by brachytherapy boost had good 5-year OS, 83.3%, and showed no local progression till 5-years. Most of the RT-induced side-effects were mild and tolerable, but 2 patients died of tracheal stenosis without any tumor recurrence.</P><P><B>Conclusions</B></P><P>Adjuvant RT may be suitable for controlling microscopic residual disease, whereas definitive RT may yield appropriate long-term survival in >50% patients with unresectable tracheal ACC. Dose escalation should be considered to warrant long-term survival in definitive RT.</P>

A case of congenital triangular alopecia arisen from unusual site of frontal area

( Jong Uk Kim ),( Seong Min Hong ),( Gyeong Je Cho ),( Woo Jung Jin ),( So Hee Park ),( In Ho Park ),( Jung Eun Seol ),( Hyojin Kim ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1

A 17-year-old boy presented with an asymptomatic 2.5x3.5 cm sized triangular alopecic patch on the right frontal area since birth. There weren’t skin changes such as size, erythema or atrophy. No other hair changes and nail involvement were observed. His parents denied specific defect or scalp problem during delivery. Trichoscopy revealed vellus hairs with white hairs and white dots. Skin biopsy revealed miniaturizing hair follicles and mild perifollicular infiltration of lymphocyte. He was diagnosed with congenital triangular alopecia. There was no improvement even if he was treated with triamcinolone intralesional injection, excimer laser, topical corticosteroid and 5% minoxidil solution. The surgical excision was carried out and size decreased successfully. Serial excision is planned. Congenital triangular alopecia (CTA), also known as temporal triangular alopecia or Brauer nevus, is circumscribed, non-cicatricial, non-inflammatory alopecia. It manifests as a triangular or oval shaped alopecic patch confined to the frontotemporal region and rarely occipital and frontal area. CTA is usually noted in children between 3 and 9 years of age and needs to be differentiated with alopecia areata by vellus hair, absence of exclamation point hair on trichoscopy and no effect by topical steroids. There was only one case which occurred on frontal area in English literature. Here we report the second case of CTA located on frontal area.

A case of skin rash induced by subcutaneous injection of bortezomib in a patient with multiple myeloma

( Jong Uk Kim ),( Seong Min Hong ),( Gyeong Je Cho ),( Woo Jung Jin ),( So Hee Park ),( In Ho Park ),( Jung Eun Seol ),( Hyojin Kim ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1

A 73-year-old man presented with erythematous plaques and nodules on his trunk. He was diagnosed with multiple myeloma 2 months ago and had been treated with subcutaneous injection of Bortezomib. After 10th injection of Bortezomib on his right lower abdomen, erythematous plaques and nodules occurred at the injection site and spread gradually. Histopathologic examination showed spongiosus, mild dermal edema, and perivascular and periadnexal inflammation composed of lymphocytes and eosinophils. He was treated with systemic and topical steroid with suspicion of allergic vasculitis and resolved dramatically. He was subsequently treated with Bortezomib with systemic steroid, and the skin lesion did not recur. Bortezomib is a proteasome inhibitor which blocks the production of nuclear factor-kB mediated inflammatory cytokines. In the bone marrow, it inhibits the binding of the myeloma cells to the bone marrow stromal cells and bone marrow angiogenesis which are treatment mechanisms on multiple myeloma. Cutaenous adverse reactions(cADR) caused by Bortezomib are usually asymptomatic maculopapular rash or nodules. The mechanism by which Bortezomib causes cADR is unclear, and clinical features and histologic findings have not been clearly elucidated. Steroid might be considered as an effective treatment. It is crucial to be familiar with cutaneous side effects associated with this antineoplastic agents to assess and manage these patients properly

Alitretinoin compliance in patients with chronic hand eczema

( Jong Uk Kim ),( Gyeong Je Cho ),( Woo Jung Jin ),( So Hee Park ),( Seung Hyun Moon ),( Jung Eun Seol ),( Hyojin Kim ) 대한피부과학회 2018 대한피부과학회 학술발표대회집 Vol.70 No.2

Background: Alitretinoin is the first drug approved as a treatment option for chronic hand eczema (CHE) unresponsive to topical steroids. Adherence to alitretinoin for 12 weeks or more is known to be effective. But, poor compliance is the most common obstacle to treatment. Objectives: This study was conducted to evaluate the compliance rate of alitretinoin treatment and explore common reasons of poor-compliance in patients with CHE Methods: We reviewed medical record of CHE patients treated with alitretinoin. Poor-compliance group was defined as subjects with alitretinoin medication for less than 12 weeks, while good-compliance group was defined as those with medication for more than 12 weeks. Results: A total of 137 subjects were enrolled and 87 of them were poor-compliance group. The percentage of subjects with clinical improvement was significantly higher in good-compliance group (88.0%) compared with poor-compliance group (43.7%). In poor-compliance group, reasons of alitretinoin cessation were insufficient response (40.8%), high cost (34.7%) and adverse events (24.5%) in which headache was the most common followed by GI problem and flushing. The rate of insufficient response was higher in male, whereas old age (>60) and female was favorable factor in occurrence of adverse reaction in poor-compliance group. Conclusion: It is probable that alitretinoin with sufficient period might increase the rate of improvement in CHE. Thus, it is important to control the factors affecting compliance in CHE treatment.