Ganghwa, South Korea

Incheon Catholic University
Ganghwa, South Korea
Time filter
Source Type

Lee S.J.,Incheon Catholic University
ACM International Conference Proceeding Series | Year: 2016

Due to the evolution of LED lighting and information technology, the application of media facades has expanded rapidly. Despite the positive aspects of media facades, the growth of them can cause light pollution and add to the confusion of the city. This study analyzes the Seoul case which implements citywide management with a master plan for media facades. Through this, the study aims to investigate the meaning of citywide management of media facades installed on individual buildings. Firstly, it investigates the conditions of media facades in Seoul City. The identified problems prove the necessity of the citywide management for media facades. Secondly, it analyzed the progress of media facades regulation of Seoul City. Management target has changed from the indiscreet installation for the individual media facades to further inducing the attractive media facade for overall Seoul City. For this, the 'Seoul Media Facade Management MasterPlan' was drafted to establish citywide management by the Seoul government. Thirdly, it analyzed the MasterPlan. The management tools in the MasterPlan are classified into regional management, elemental management, and specialization plans, each having detailed approaches. Finally, the study discussed the meaning of citywide management in the aspect that media facades are the cultural asset to the city, that the regional differentiation is adopted, and that the continuous maintenance for both of the hardware and content) is important. Media facades utilizing the facade of buildings are recognized as an element of urban landscapes securing the publicness, contributing to the vitalization of the area, and finally providing pleasure to the citizens. © 2016 ACM.

Lee B.-S.,Incheon Catholic University | Chung J.-W.,CHA Medical University | Kim J.-M.,University of Ulsan | Kim K.-A.,Chungbuk National University | Bin S.-I.,University of Ulsan
Knee Surgery, Sports Traumatology, Arthroscopy | Year: 2012

Purpose: Plain radiographs are frequently used to select appropriately sized meniscal allografts, of which the width and length cannot be always perfectly matched. The objective of this study was to decide which of these dimensions should be matched with a more priority considering proper position of the lateral meniscal transplants. Methods: The positions of 34 lateral, fresh-frozen meniscal allografts, transplanted using the central bone bridge method, were evaluated by magnetic resonance imaging (MRI) 2 days after surgery. A size mismatch was defined as a difference between preoperative radiographic size and a real dimension of the transplants. The lateral subluxation of the mid-body on the coronal plane and the anterior and posterior horn positions on the sagittal plane were estimated on the MRIs. It was evaluated whether size mismatches were associated with the meniscal subluxation beyond articular cartilage margin on each plane. Results: The mean lateral subluxation of the mid-body on the center of coronal sections was 1.7 ± 1.8 mm. The anterior and posterior horns were located 2.0 ± 2.1 mm and -3.8 ± 2.7 mm from the articular edge, respectively, in the center of sagittal images. Lateral subluxation was significantly associated with width mismatch (r = 0.415-0.486, P < 0.05), but length mismatch was not significantly correlated with the anterior or posterior horn position on sagittal images (n.s.). Conclusion: The results of this study suggest that width matching using plain radiographs would be more reliable than length matching when it is sought to assure adequate positioning of meniscal transplants, if both dimensions cannot be simultaneously matched. Level of evidence: II. © 2011 Springer-Verlag.

Park B.H.,Sungkyunkwan University | Park B.H.,Incheon Catholic University | Jeon H.G.,Sungkyunkwan University | Choo S.H.,Sungkyunkwan University | And 5 more authors.
BJU International | Year: 2014

Objective To evaluate predictors of more aggressive disease and the role of multiparametric 3.0-T magnetic resonance imaging (MRI) in selecting patients with prostate cancer for active surveillance (AS). Patients and Methods We retrospectively assessed 298 patients with prostate cancer who met the Prostate Cancer Research International: Active Surveillance (PRIAS) criteria, defined as T1c/T2, PSA level of ≤10=ng/mL, PSA density (PSAD) of <0.2=ng/mL 2, Gleason score <7, and one or two positive biopsy cores. All patients underwent preoperative MRI, including T2-weighted, diffusion-weighted, and dynamic contrast-enhanced imaging, as well as radical prostatectomy (RP) between June 2005 and December 2011. Imaging results were correlated with pathological findings to evaluate the ability of MRI to select patients for AS. Results In 35 (11.7%) patients, no discrete cancer was visible on MRI, while in the remaining 263 (88.3%) patients, a discrete cancer was visible. Pathological examination of RP specimens resulted in upstaging (>T2) in 21 (7%) patients, upgrading (Gleason score >6) in 136 (45.6%), and a diagnosis of unfavourable disease in 142 (47.7%) patients. The 263 patients (88.3%) with visible cancer on imaging were more likely to have their cancer status upgraded (49.8% vs 14.3%) and be diagnosed with unfavourable disease (52.1% vs 14.3%) than the 35 patients (11.7%) with no cancer visible upon imaging, and these differences were statistically significant (P < 0.001 for all). A visible cancer lesion on MRI, PSAD, and patient age were found to be predictors of unfavourable disease in multivariate analysis. Conclusion MRI can predict adverse pathological features and be used to assess the eligibility of patients with prostate cancer for AS. © 2013 The Authors. BJU International © 2013 BJU International.

Kim J.-M.,University of Ulsan | Lee B.-S.,Incheon Catholic University | Kim K.-H.,University of Ulsan | Kim K.-A.,Chungbuk National University | Bin S.-I.,University of Ulsan
American Journal of Sports Medicine | Year: 2012

Background: Meniscus allograft transplantation (MAT) has shown efficacy in relieving pain and improving knee joint function, but objective evaluation in a large number of patients is necessary to verify this effect.Hypothesis: Meniscus allograft transplantation relieves pain and improves function of the involved knee joint. Objective evaluation provides evidence of allograft integrity.Study Design: Case series; Level of evidence, 4.Methods: Of the 115 knees that underwent MAT from December 1996 to February 2009, 110 (95.7%) were followed up for more than 2 years and were enrolled in this study. Of these, 83 underwent lateral MAT, and 27 underwent medial MAT. Clinical outcomes were evaluated using the modified Lysholm score and Knee Society pain score. All knees underwent postoperative magnetic resonance imaging (MRI) and/or second-look arthroscopy to evaluate the integrity and position of the allografts, with allograft status classified as satisfactory, fair, or poor.Results: At a mean follow-up of 49.4 months, clinical improvement was achieved in 104 of the 110 knees (94.5%). Mean modified Lysholm score increased from 72.7 preoperatively to 92.3 at final follow-up (P <.001), and mean preoperative Knee Society pain score increased from 32.5 to 47.7 (P <.001). Of the 110 knees, 90 were evaluated by postoperative MRI alone, 2 by second-look arthroscopy alone, and 18 by both. Magnetic resonance imaging showed 12 gross tears and 6 small tears in the allograft. Mean extrusion of the allograft was 3.7 mm, and mean relative percentage of extrusion was 42.6%. Second-look arthroscopy showed 6 gross tears and 1 small flap tear. Classification by clinical outcome, MRI, and second-look arthroscopy graded 90 allografts (81.8%) as satisfactory, 8 (7.3%) as fair, and 12 (10.9%) as poor.Conclusion: Meniscus allograft transplantation using bone fixation resulted in significant symptomatic and functional improvements. Magnetic resonance imaging or second-look arthroscopy was necessary to assess allograft status even after favorable clinical outcome. Meniscus allograft transplantation with bone fixation is considered effective for symptomatic, totally meniscectomized knees. © 2012 The Author(s).

Lee B.-S.,Incheon Catholic University | Bin S.-I.,University of Ulsan | Kim J.-M.,University of Ulsan
American Journal of Sports Medicine | Year: 2016

Background: Little is known about the degree of articular cartilage degeneration after subtotal/total lateral meniscectomy in patients who later undergo isolated lateral meniscal allograft transplantation (LMAT). It has not yet been studied whether arthritic changes as shown on radiographs were lower during the posttransplantation period than during the meniscus-deficient period. Hypothesis: Articular cartilage will significantly degenerate during the meniscus-deficient period, but the progression in radiographic arthrosis is reduced after LMAT. Study Design: Case series; Level of evidence, 4. Methods: This study retrospectively reviewed 49 patients who underwent subtotal/total lateral meniscectomy before isolated LMAT performed over 1 year later by the same surgeon. International Cartilage Repair Society (ICRS) grades of the femorotibial joint at the time of subtotal/total meniscectomy and at LMAT were compared. Radiographic evaluation was performed at the time of initial meniscectomy, LMAT, and the latest follow-up in 38 patients (after 11 patients whose radiographs showed incomplete ossification at the time of meniscectomy were excluded). Arthrosis, based on Kellgren-Lawrence (K-L) grades, was determined on standing anteroposterior views. Joint space width (JSW) was measured on weightbearing flexion posteroanterior views. Results: Over a mean meniscus-deficient period of 4.5 years (range, 1-13 years), articular cartilage significantly degenerated on the femoral and tibial sides (P <.001). Grade ≥3 degeneration on the lateral tibial plateau was observed in 13 patients (27%) at the time of initial meniscectomy; this incidence doubled to 28 patients (57%) by the time of LMAT. The K-L grades worsened (P <.001) and JSWs narrowed significantly (-0.65 ± 1.09 mm; P =.001) during the mean meniscus-deficient period of 3.1 years. At radiographic assessment, however, the K-L grades (P =.097) and JSWs (4.06 ± 1.19 vs 3.92 ± 1.21 mm; mean difference, -0.14 ± 0.68 mm; P =.213) did not significantly change during the mean posttransplantation period of 3.8 years. The changes in ICRS grade and JSW during the meniscus-deficient period were not associated with age, body mass index, mechanical axis deviation, or Tegner activity level (P >.05 for all relationships). Conclusion: Patients who underwent isolated LMAT showed substantial articular cartilage degeneration at the time of initial subtotal/total lateral meniscectomy, and this degeneration progressed thereafter. Further progression of radiographic arthrosis was delayed after LMAT. © 2015 The Author(s.

Lee B.-S.,Incheon Catholic University | Kim J.-M.,Kosin University | Kim K.-A.,Chungbuk National University | Bin S.-I.,University of Ulsan
Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association | Year: 2015

RESULTS: The mean lateral subluxation in the coronal plane was 2.6 ± 1.6 mm. Among our patients, 23 transplants (32.4%) showed extrusion. The intraoperative cartilage status of the femoral condyle and tibial plateau showed significant differences between the nonextruded (≤3 mm) and extruded (>3 mm) groups (P = .010 and P = .001, respectively). There were no differences in other factors between these 2 groups. Binary logistic regression analysis showed that tibial-side cartilage wear of International Cartilage Repair Society grade 3 or more was a significant risk factor for meniscal extrusion.PURPOSE: The objective of this study was to identify the patient-related risk factors for lateral meniscal extrusion after lateral meniscal allograft transplantation (MAT) regarding demographic characteristics, alignment, and pre-existing arthrosis.METHODS: Seventy-one patients who underwent arthroscopic lateral MAT with bone bridge fixation between 2008 and 2011 were assessed. Lateral meniscal subluxation was measured on mid-coronal sections of magnetic resonance images 1 year postoperatively. Subluxation of more than 3 mm was considered to be extrusion. Age, gender, body mass index, time from previous meniscectomy, mechanical axis deviation, Kellgren-Lawrence grade on preoperative radiographs, and intraoperative International Cartilage Repair Society grade were assessed as possible patient-related factors.CONCLUSIONS: Lateral meniscal extrusion 1 year after lateral MAT is affected by the degree of intraoperative cartilage wear, most notably on the tibial side. Patient demographic characteristics, alignment, and radiographic arthritic changes did not differ between nonextruded and extruded MAT cases.LEVEL OF EVIDENCE: Level IV, therapeutic case series. Copyright © 2015 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.

Lee B.-S.,Incheon Catholic University | Chung J.-W.,Barun Joint Orthopedics Geumgwang dong | Kim J.-M.,University of Ulsan | Kim K.-A.,Chungbuk National University | Bin S.-I.,University of Ulsan
Clinical Orthopaedics and Related Research | Year: 2013

Background: Two previous studies recently raised the possibility of a high risk of early femoral components loosening with high-flexion (HF) prostheses in Asian populations and suggested that the high failure rate of HF TKAs was associated with HF ability. However, these findings are controversial given other studies reporting a low incidence of aseptic failures in HF prostheses. Questions/purposes: We therefore determined (1) the rate of achieving postoperative HF after HF TKA; (2) whether the aseptic loosening rate of HF prostheses is high; and (3) whether the survivorship was worsened in patients who achieved postoperative deep knee flexion in our cohort of Korean patients. Methods: We retrospectively reviewed 488 patients who had 698 primary TKAs using the NexGen® Legacy Posterior-Stabilized Flex system implanted from 2003 to 2010. There were 40 men and 448 women with a mean age of 68 years. We obtained Hospital for Special Surgery scores, maximal flexion, and radiographs. The minimum followup for functional and radiographic evaluations was 2 years (median, 4.8 years; range, 2-8.7 years). We performed a survival analysis on all patients for aseptic loosening. Results: Three hundred sixty knees (52%) could achieve ≥ 135 maximum flexion. Six of the 698 knees (0.9%) developed aseptic loosening (three femoral and three tibial). The survival at 5 years for aseptic loosening was 99.1%. The overall survival for aseptic failure did not differ between knees that achieved HF and those that did not. Conclusions: We observed a low incidence of early aseptic loosening of HF designs in this series. Our findings suggest HF TKAs have high survival in Asian patients at 5 years although half of the patients attained maximum flexion more than 135 postoperatively. Level of Evidence: Level IV, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence. © 2012 The Association of Bone and Joint Surgeons®.

Lee D.-H.,Korea University | Kim J.-M.,University of Ulsan | Lee B.-S.,Incheon Catholic University | Kim K.-A.,Chungbuk National University | Bin S.-I.,University of Ulsan
American Journal of Sports Medicine | Year: 2012

Background: In lateral meniscus allograft transplantation (MAT) using the keyhole method, precise trough drilling is critical for ensuring the graft is placed at the correct anatomic position to minimize the risk of extrusion. However, no study has focused on the effect of bony trough axial obliquity on graft extrusion. Our purpose was to investigate whether bony trough axial obliquity and bony trough position correlate with graft extrusion in lateral MAT using the keyhole method. Hypothesis: We hypothesized that drilling the tibial bony trough at a greater axial angle would increase the risk of graft extrusion. Study Design: Case series; Level of evidence, 4. Methods: The study involved 49 patients who underwent lateral MAT between 2009 and 2010 following total or subtotal meniscectomy. The mean patient age at the time of surgery was 34 years (range, 19-52 years). Graft extrusion and bony trough parameters (absolute and relative distance at the anterior, center, and posterior cuttings of the bony trough, and axial trough angle [ATA]) were assessed using conventional magnetic resonance imaging (MRI) performed on postoperative day 2. The correlation between graft extrusion and MRI trough parameters was analyzed, and multiple linear regression analysis was performed to identify predictors of graft extrusion. Results: Of the 7 MRI measurement parameters, the ATA (r = .355, P = .012), absolute anterior distance (r = .301, P = .031), and relative anterior distance (r = .307, P = .032) were found to positively correlate with absolute extrusion. The ATA (r = .296, P = .037) and relative anterior distance (r = .296, P = .039) were also found to correlate with relative extrusion. The ATA was found to be a predictor of absolute extrusion (β = .36, P = .012) and relative extrusion (β = .33, P = .019). Conclusion: The risk of graft extrusion increases as the axial plane trough angle increases. The angle can be reduced by ensuring that the bony trough starting point is not created in too lateral a position. © 2012 The Author(s).

Lee B.-S.,Incheon Catholic University | Chung J.-W.,Barun Joint Orthopedics | Kim J.-M.,University of Ulsan | Cho W.-J.,University of Ulsan | And 2 more authors.
American Journal of Sports Medicine | Year: 2012

Background: Little is known about morphologic changes in the remodeling period after human meniscal allograft transplantation (MAT).Hypothesis: The gross structure of meniscal transplants may be altered significantly in width and thickness during early remodeling periods.Study Design: Cohort study; Level of evidence, 3.Methods: Thirty-one patients who underwent MAT (9 medial and 22 lateral menisci) between 2008 and 2009 were prospectively evaluated by serial magnetic resonance imaging scans 2 days, 6 weeks, and 3, 6, and 12 months after surgery. At each time point, the width and thickness of the menisci were measured. The relative degree of shrinkage after 1 year was categorized as minimal (<10%), mild (10%-25%), moderate (25%-50%), or severe (>50%). The Lysholm score and Tegner activity level were used for clinical outcome scales.Results: More apparent changes were observed at mid-body rather than at the posterior horn. Meniscal width at the mid-body decreased to 89% (P <.01), whereas thickness increased to 115% (P <.01) at 12 months. Shrinkage was observed for 3 months after MAT, but there were no significant changes thereafter. The thickness of the meniscal peripheral rim did not change before 3 months but increased afterward, for up to 1 year. Of the 31 patients, 20 (64.5%) had minimal shrinkage, 6 (19.4%) had mild shrinkage, 5 (16.1%) had moderate shrinkage, and none had severe shrinkage over 1 year. In the 5 cases of moderate shrinkage, the reduction occurred progressively for 1 year. However, the relative morphologic changes did not correlate with clinical outcome scales at postoperative 1 and 2 years (P >.05). The preoperative alignment deviation, cartilage status (Outerbridge grade), age, gender, amount of extrusion, and time from previous meniscectomy did not affect the degree of shrinkage.Conclusion: Gross morphologic alterations, as determined by width and thickness, were observed during the first postoperative year. Substantial shrinkage at the mid-body occurred progressively for 1 year in 16.1% of the cases. No association was found between morphologic changes and short-term clinical outcomes. © 2012 The Author(s).

Shin E.,Incheon Catholic University
International Journal of u- and e- Service, Science and Technology | Year: 2015

This paper presents Wind Frame, a sonic display and machine that can listen from wind flow. The installation is based on interactive, reactive, and generative processes as they relate to intersections between natural and mechanical systems. It develops the sonification of wind flow, in a series of interactive projects to re-generate a natural phenomenon through a combination of analog and digital technology. The interaction technique involves the use of an accelerometer, Bluetooth modules, ventilation fans, relays, an Arduino processor, and a mechanical structure for generating and amplifying artificial wind sounds. This work investigates the qualities of audible and tactile display, mechanical device and interactive sound art, while addressing multi-sensory aspects of air movement. © 2015 SERSC.

Loading Incheon Catholic University collaborators
Loading Incheon Catholic University collaborators