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下顎 臼齒部 分節骨切斷術에 依한 臼齒部 交叉敎合의 治驗例
金允植,蔡平培,金命來 大韓顎顔面成形再建外科學會 1990 Maxillofacial Plastic Reconstructive Surgery Vol.12 No.3
This is to report a case of surgical and orthodontic of posterior scissor bite, deep bite and gummy smile by the segmental osteotomies. The surgical thechnics procedures used are Peterson's mandibular posterior segmental osteotomy, modified K??le technic for mandibular anterior segment and Wunderer's maxillary anterior segmental osteotomy. The results are as follows : 1) Peterson's mandibular posterior segmental osteotomy could be achieved by the buccal approach with some difficulties in accessbility. 2) Upper and lower anterior segmental osteotomies were followed separately to correct the deep curve of Spee, deep bite and gummy smile in shortened period. 3) All alveolar segments were immobilized in preplanned position by the prefabricated palatal and lingual resin splint, therefore intermaxillary fixation was not necessary.
박채령(Chae Ryung Park),전주식(Chu Shik Jhon) 한국정보과학회 1988 한국정보과학회 학술발표논문집 Vol.15 No.2
본 논문은 설계된 심볼릭 레이아웃을 최적화 과정을 수행하여 설계 규칙을 만족하는 물리적 레이아웃으로 변환시키는 점진적 심볼릭 레이아웃 처리 시스템의 설계 및 구현 방법에 관하여 기술한다. 점진적 심볼릭 레이아웃 처리 시스템은 기존의 최적화 방식의 개념을 확장하여 대각선 방향의 최적화 과정도 수행하며, 점진적 최적화 방식을 도입하여 사용자의 경험적 지식을 최적화 과정에서 이용할 수 있으며, 또한 최적화 과정의 취소를 허용함으로써 보다 다각적인 최적화 결과를 생성할 수 있다.
레이아웃 처리를 위한 45˚ Corner Stitching 자료 구조의 설계
박채령(Chae Ryung Park),전주식(Chu Shik Jhon) 한국정보과학회 1989 한국정보과학회 학술발표논문집 Vol.16 No.1
본 논문에서는 45˚ 레이아웃을 허용하는 45˚ Corner Stitching 자료 구조의 설계에 관하여 기술한다. 45˚ Corner Stitching 자료 구조는 기존의 Corner Stitching 자료 구조에서 사용하는 타일 표현 방식에 타일의 형태 정보를 나타내는 플래그를 첨가하여 오브젝트를 표현한다. 45˚ corner Stitching 자료 구조를 이용할 경우, 45˚ 레이아웃을 허용함으로써 타일의 통합 조건이 기존의 자료 구조에 비해 제한되므로 타일의 수가 늘어나게 되며, 삽입과 삭제 과정의 경우, 기존의 corner stitching 자료 구조에 비해 stitch의 변경이 빈번히 일어나게 되어 수행 시간이 늘어나게 된다. 그러나 그의 여러 형태의 탐색 작업은 기존의 자료 구조와 동일한 시간내에 수행된다.
권채령 ( Chae-ryung Kwon ),장미나 ( Mina Jang ),정다운 ( Da Wun Jeong ),김동은 ( Dong-eun Kim ) 한국의류학회 2019 한국의류학회지 Vol.43 No.3
This study measured and analyzed male firefighters hand sizes as well as suggested data for developing firefighting gloves with a good fit. Accordingly, body dimensions related to the hand were measured for 100 male firefighters. Twenty-three measuring items related to the hand and lower arm were selected. The firefighters' measurement data were compared to general adult male measurements from the 6th Korean Anthropometric data to analyze the hand sizes characteristics of firefighters. As a result, height, hand circumference, hand breadth, wrist circumference, elbow-wrist length, forearm-fingertip length and firefighter weight were significantly larger than adult males. A correlation analysis for 23 items was conducted to select items used as standards for setting a size when manufacturing firefighting gloves. Hand length and circumference were selected as representative hand parts for making firefighting gloves. Cross analysis between hand length and circumference were conducted to find the section showing the highest distribution ratio. As a result, the highest sections were between 19cm and 21cm for hand circumference and between 18.5cm and 19.5cm for hand length, which may be suggested as the most important ranges.
Risk factors of ocular involvement in children with mitochondrial respiratory chain complex defect
Chae, Jung-Hyun,Lee, Jung-Hun,Kim, Kyo-Ryung,Byeon, Suk-Ho,Lee, Young-Mock,Kang, Hoon-Chul,Lee, Joon-Soo,Kim, Heung-Dong The Korean Pediatric Society 2010 Clinical and Experimental Pediatrics (CEP) Vol.53 No.12
Purpose: Mitochondrial dysfunction can present with various symptoms depending on the organ it has affected. This research tried to analyze the ophthalmologic symptoms and ophthalmologic examination (OE) results in patients with mitochondrial disease (MD). Methods: Seventy-four patients diagnosed with mitochondrial respiratory chain complex defect with biochemical enzyme assay were included in the study. They were divided into 2 groups based on the OE results by funduscopy and were analyzed on the basis of their clinical features, biochemical test results, morphological analysis, and neuroimaging findings. Results: Thirty-seven (50%) of the 74 MD patients developed ophthalmologic symptoms. Abnormal findings were observed in 36 (48.6%) patients during an OE, and 16 (21.6%) of them had no ocular symptoms. Significantly higher rates of prematurity, clinical history of epilepsy or frequent apnea events, abnormal light microscopic findings in muscle pathology, diffuse cerebral atrophy in magnetic resonance imaging, and brainstem hyperintensity and lactate peaks in magnetic resonance spectroscopy were noted in the group with abnormal OE results. Conclusion: Although the ophthalmologic symptoms are not very remarkable in MD patients, an OE is required. When the risk factors mentioned above are observed, a more active approach should be taken in the OE because a higher frequency of ocular involvement can be expected.
Se Ryung Yang,Min Hyung Kim,Na Mi Lee,Dae Yong Yi,Sin Weon Yun,Soo Ahn Chae,In Seok Lim,Eung Sang Choi 중앙대학교 의과대학 의과학연구소 2016 中央醫大誌 Vol.41 No.2
Purpose: A history of complex febrile seizure is associated with an increased risk to develop epilepsy. We examined the correlation between complex febrile seizures and duration of recognized fever prior to the onset of febrile seizure. Methods: This retrospective study included 680 children admitted to Chung-Ang University Hospital with febrile seizures between January, 2010 and December, 2014. Children were assigned to 4 groups based on the time of fever detection: Group 1 (at the time of seizure), Group 2 (<24 h prior to seizure), Group 3 (between 24 and 48 h prior to seizure), and Group 4 (>48 h prior to seizure). Results: A significant correlation was observed between the duration of recognized fever prior to the onset of febrile seizures and occurrence of complex febrile seizure (p = 0.005). Maximum temperatures before seizure and during seizure did not differ between the groups (p = 0.192 & p = 0.095, respectively). Complex febrile seizure was more common in Group 3 than in any other group. Additionally, on dividing the patients into those with fever duration <24 h and ≥24 h, incidence of complex febrile seizures in the latter group was higher. Incidence of complex febrile seizures in Group 3 was the highest among the groups even when the analysis was restricted t o patients having their first attack of febrile seizure. Conclusion: The duration of recognized fever prior to febrile seizures may be a risk factor for complex febrile seizures. Children having fever 24~48 hours prior to febrile seizure had a significantly higher incidence of complex febrile seizures.
( Wan Ryung Lim ),( So Young Hong ),( Chae Bong Kim ),( Jeong Hoon Kim ),( Hye Yung Yum ),( Ho Jang Kwon ),( Kyoo Sang Kim ) 한국피부장벽학회 2013 한국피부장벽학회지 Vol.15 No.2
The prevalence of atopic dermatitis (AD) has increased over the past decades. AD is a very common chronic relapsing inflammatory skin disease in childhood. We attempted to investigate the prevalence, severity and risk factors for AD as determined by an International Study of Asthma and Allergies in Childhood (ISAAC)-based questionnaire and also determined by dermatologist among young children at child care centers in Seoul, Korea. A total of 3,262 children on autonomous 25 districts in Seoul Metro City were enrolled. ISAAC questionnaires containing the prevalence of AD symptoms in the last 12 months were distributed to 50 child care centers and subject`s parents responded to the questions. Dermatologists visited 50 child care centers to screen AD and to conduct SCORAD (SCORing Atopic Dermatitis), Skin prick test for 4 common inhalant allergens [Dermatophagoides farinae(Der f1), Dermatophagoides pteronyssinus(Der p1), cockroach, dog, cat]. The prevalence of AD symptoms during the last 12 months determined by ISAAC questionnaire and the prevalence determined by dermatologist were 31.8% and 12.8%, respectively. Sensitization to house dust mite allergen such as Der f1(49.8%) and Der p1(45.2%) was the highest, followed by cat allergen(5.7%), dog allergen(5.5%), and cockroach allergen(3.8%). To investigate the association between severity of AD and other factors children were classified into two groups, less than median(n=213) and over median(n=205), based on SCORAD median index 20.5. According to multiple logistic regressions models, the risk of over median group was higher in increasing age (OR=1.86; 95% CI:1.049-3.312, p=0.034), having family history of atopic disease (OR=1.27; 95% CI:0.850-1.898, p=0.243) and sensitization on the skin prick test (OR=1.09; 95% CI:0.722-1.632, p=0.694). In conclusion, the prevalence of AD determined by ISAAC questionnaire was higher than the prevalence determined by dermatologist. The severity of AD was associated with increasing age, having family history of atopic disease and positive reaction to inhalant allergen on the skin prick test. This is the first SCORAD and Skin prick test study in Korean children as young as 0-5 years conducted by dermatologist to evaluate the severity of AD.
Il-Chae Yoon,Ik-Soo Kang,Kyung-Hee Park,Jae-Young Heo,Je-Ryung Lee,Yun-Chul Jung 한국정밀공학회 2024 International Journal of Precision Engineering and Vol.25 No.1
As the application of nickel-based heat-resistant alloy, a difficult-to-cut material, increases in aerospace engine, gas turbine and automotive parts, tool wear is emerging as an important issue. In this paper, finite-element (FE) simulations and experimental approaches are presented to estimate the tool wear of coated tungsten carbide cutting tools in the orthogonal cutting of Inconel 718. A tool wear model depends strongly on the experimentally acquired wear rates, which are measured by cutting tests. A three-dimensional data-based measurement method was investigated, and the volume loss of the tools was obtained to measure the wear geometries accurately. FE simulations of the cutting process were performed to calibrate the tool wear model by predicting the tool–workpiece interface temperature and normal stress. The constants of the tool wear model, for which the temperature-dependent wear model and Usui’s wear model were applied, were determined by a hybrid approach using FE simulation and experimental results. The approach was validated by comparing the estimated values with the experimental data.