• Archives of Plastic Surgery
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• 제50권6호
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• pp.541-549
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• 2023

Background Despite its many advantages, prepectoral breast reconstruction also carries the risk of implant rippling. The recent introduction of partial superior implant coverage using a pectoralis muscle slip in prepectoral direct-to-implant (DTI) breast reconstruction has shown the potential to minimize upper pole rippling. The purpose of this study was to identify factors associated with rippling and the effectiveness of our surgical technique. Methods In total, 156 patients (186 breasts) who underwent prepectoral DTI breast reconstruction between August 2019 and March 2021 were identified retrospectively. Patient data were analyzed from medical records. Univariable and multivariable logistic analyses were performed to contextualize the risks associated with rippling deformity relative to demographic characteristics and other clinical factors. Retrospective propensity-matched analysis was performed to identify the relationship between rippling deformity and the reconstruction method. Results Patients with body mass index (BMI; odds ratio [OR], 0.736; p < 0.001), those with a postoperative chemotherapy history (OR, 0.324; p = 0.027) and those who received breast reconstruction via the superior coverage technique (OR, 0.2; p = 0.004), were less likely to develop rippling deformity. The median follow-up period was 64.9 weeks, and there were no significant differences between patients in types of mastectomy, implant, or acellular dermal matrix. Patients who underwent superior coverage technique-based reconstruction showed significantly reduced rippling (OR, 0.083; p = 0.017) Conclusion Patients with higher BMI and prior postoperative chemotherapy were less likely to develop rippling deformity. The superior coverage technique can be effective in minimizing upper pole rippling.

• 치위생과학회지
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• 제15권1호
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• pp.1-11
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• 2015

본 연구는 다양한 나라에서 우리나라에 이주해 온 외국인 노동자 426명을 대상으로 일반적인 특성에 따른 칫솔질 행태와 구강건강상태, 칫솔질과 구강건강상태와의 관계를 분석한 결과 다음과 같은 결과를 얻었으며 통계적으로 유의한 결과이다. 일반적인 특성에 따른 하루 3회 이상 칫솔질 빈도는 여성이 63.0%로 남성보다 높았으며, 교육수준은 학력 수준이 높을수록 칫솔질 빈도가 높았다. 체류기간은 국내에 체류기간이 어느 정도 지난 경우 높게 나타났다. 건강보험은 전반적으로 건강보험이 가입된 경우 빈도가 높았다. 의료비 부담은 무료인 경우 50.0%로 가장 높았고, 친구 또는 정기적인 모임이 있는 경우 칫솔질 빈도가 높게 측정되었다. 칫솔질 부위 중 치아, 잇몸, 혀를 전체적으로 잘 닦는 경우는 연령이 적을수록, 미혼인 경우가 전체적으로 잘 닦고 있었으며 수입은 보통인 경우가 잘 닦고 있었고, 건강보험에 가입한 경우가 잘 닦고 있었다(p<0.05). 일반적인 특성에 따른 칫솔질 소요시간 3분 이상인 집단은 미혼인 경우와 건강보험에 가입된 경우가 칫솔질 소요시간이 길었으며, 칫솔질 교육유무에서는 국내 체류기간이 5년 초과인 경우와 정기적인 모임이 있는 경우가 칫솔질 교육을 많이 받았다. 구강위생용품은 성별은 여성, 학력은 학력수준이 높을수록, 체류기간은 3~5년 사이가 많이 사용하고 있었으며 의료비 부담은 무료인 경우와 정기적인 모임이 있는 경우 구강위생용품을 많이 사용한다고 나타났다(p<0.05). 일반적인 특성에 따른 DMFT index의 평균은 6.98, CPITN의 평균은 3.03으로 우리나라 2010년 국민구강건강 실태조사에서 성인 18세에서 44세의 DMFT index 5.9, CPITN은 1.6에 비하여 높은 것으로 나타났다. 성별에서는 DMFT index가 여성이 높았고, CPITN은 남성이 높았다. 연령, 결혼여부, 학력의 CPITN은 연령이 높을수록 높았으며 결혼여부는 기혼이 낮았다. 학력은 고졸 이하가 낮았다. 동거인이 없는 경우는 DMFT index가 높았고, CPITN은 동거인이 있는 경우가 2.97로 낮았다. 수입은 100만원 미만이 8.17로 DMFT index가 가장 높았고, CPITN은 100만원 미만이 2.75로 가장 낮았다. 건강보험이 있는 경우 DMFT index는 높았고, CPITN은 낮았다(p<0.05). 칫솔질 행태에 따른 DMFT index와 CPITN의 결과는 칫솔질 빈도 3회 이상에서 DMFT index가 8.34로 가장 높았으며, CPITN은 2.96으로 가장 낮았다. DMFT index는 칫솔질 행태가 좋을수록 높았으며 CPITN은 칫솔질 행태가 좋지 않을수록 낮게 나타났다. 상관분석 결과는 DMFT index에서 칫솔질 빈도와 칫솔질 부위, CPITN에서는 칫솔질 부위와 칫솔질 소요시간이 유의성을 나타냈다(p<0.05). 이상과 같은 결과를 바탕으로 외국인 이주 노동자들의 구강건강증진을 위한 질 높은 의료서비스를 제공하기 위해서는 치아우식증과 치주질환의 예방법으로 가장 기본인 칫솔질의 중요성을 인식시키고 올바른 칫솔질 관리를 위한 지속적인 교육이 이루어져야 할 것이다.

• 한국주거학회논문집
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• 제21권6호
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• pp.99-108
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• 2010

This study investigated the environmental indices in environmental administration, and to presents how to develop a sustainable environmental evaluation index. The index should be used to evaluate composite plans in the environmental aspects as well as means for setting goals of basic plans for the environment and its management. Specifically, the goals of composite plans are to check environments and land use frame, and evaluate individual measures (public projects). Environment policies are required to be 'a policy creating a clean environment' from 'a policy of environment regulation'. For the organization of a basic framework of environment policies, five topics are needed to be considered, such as the clarification of the idea of environment, establishment of environment regulations, environment management plan, plan to support civilian's action, and local government's efforts for the global matters of environment. For the amenity environments, people should expand their environmental behavior based on their voluntary intentions in transformation of personal life styles, projects with less load on the environment, development of environmentally-friendly projects with consideration for their impact on the earth. This study suggests that they should put more efforts into the development and implementation of useful environmental indices which effectively analyse the regional character to protect the natural ecology and create an sustainable environment with wide coverage.

• 한국의학물리학회지:의학물리
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• 제13권1호
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• pp.15-20
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• 2002

전신 정위 방사선 시술 시 적정 치료 조사면에 대한 연구를 실시하였다. 치료표적 직경이 1cm에서 7cm까지 1cm 간격인 경우에 다양한 크기의 치료 조사면 크기에서 만들어낸 선량 분포를 분석하였다. 치료조사면은 표적 크기에서 -1cm~2cm를 각각 더한 크기로 하였다. 치료 계획의 성적은 TCI(Target Conformity Index)로 표현하였다. 모든 표적 크기에서 -0.5cm~0.5cm를 더한 치료 조사면에서 가장 높은 TCI를 보였다. 6cm 이상의 표적 크기에서는 -0.5cm 또는 0cm를 더한 조사면에서 우수한 성적을 보였으며, 표적 크기 2cm 이하에서는 0cm 또는 0.5cm를 더한 조사면이 좋은 결과를 보였다. 표적 크기와 관계없이 동중심점 선량의 80%～90%에 처방하는 것이 가장 효율적으로 나타났다.

• 융합경영연구
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• 제10권3호
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• pp.21-36
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• 2022

Purpose: The purpose of this study is to compare and analyze the enterprise's score index calculated from atypical data and corrected data. Research design, data, and methodology: In this study, news articles which are non-financial information but qualitative data were collected from 2,432 SMEs that has been extracted "square proportional stratification" out of 18,910 enterprises with fixed data and compared/analyzed each enterprise's score index through text mining analysis methodology. Result: The analysis showed that qualitative data can be quantitatively evaluated by region, industry and period by collecting news from SMEs, and that there are concerns that it could be an element of alternative credit evaluation. Conclusion: News data cannot be collected even if one of the small businesses is self-employed or small businesses has little or no news coverage. Data normalization or standardization should be considered to overcome the difference in scores due to the amount of reference. Furthermore, since keyword sentiment analysis may have different results depending on the researcher's point of view, it is also necessary to consider deep learning sentiment analysis, which is conducted by sentence.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권5호
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• pp.1807-1824
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• 2015

As the technologies advance, mobile peer-to-peer (MP2P) networks or systems become one of the major ways to share resources and information. On such a system, the information retrieval (IR), including the development of scalable infrastructures for indexing, becomes more complicated due to a huge increase on the amount of information and rapid information change. To keep the systems on MP2P networks more reliable and consistent, the index structures need to be updated frequently. For a semantic IR system, the index structure is even more complicated than a classic IR system and generally has higher update cost. The most well-known indexing technique used in semantic IR systems is Latent Semantic Indexing (LSI), of which the index structure is generated by singular value decomposition (SVD). Although LSI performs well, updating the index structure is not easy and time consuming. In an MP2P environment, which is fully distributed and dynamic, the update becomes more challenging. In this work, we consider how to update the sematic index generated by LSI and keep the index consistent in the whole MP2P network. The proposed Concept Space Update (CSU) protocol, based on distributed 2-Phase locking strategy, can effectively achieve the objectives in terms of two measurements: coverage speed and update cost. Using the proposed effective synchronization mechanism with the efficient updates on the SVD, re-computing the whole index on the P2P overlay can be avoided and the consistency can be achieved. Simulated experiments are also performed to validate our analysis on the proposed CSU protocol. The experimental results indicate that CSU is effective on updating the concept space with LSI/SVD index structure in MP2P semantic IR systems.

• Journal of Ecology and Environment
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• 제36권1호
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• pp.101-112
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• 2013

To quantitatively analyze the effects of burning, we conducted a vegetation survey in the grasslands in Kirigamine, central Japan. We classified each species into stages of succession based on the life-history traits of the species and defined the score of the species in each stand based on the classification. We weighted the scores with a v-value, the product of coverage and height in the quadrat, and summed them to calculate the index of dynamic status. With these indices, we were able to quantitatively compare the stands in the study area and discern minute differences between the stands with different lengths of restoration periods since the disturbance of burning. These indices correlated with the v-value of trees, suggesting that the disturbance of burning seemed to affect the trees in the stand. We then calculated the growth of the tree species Pinus densiflora to evaluate its contribution to the index of dynamic status.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2005년도 학술발표논문집
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• pp.649-654
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• 2005

This study proposes a particular approach to assess information about NDVI(Normalized Difference Vegetation Index) and LAI(Leaf Area Index) from the spectroradiometer and NOAA/AVHRR satellite data. AVHRR data were collected in twelves months over a one year period in 2004. We calculated 10-day composite NDVI using daily composite AVHRR surface reflectance products(1km spatial resolution). The 10-day composite NDVI have a great effect on the plant growth conditions. Considerably, NDVI was increased by developing muscle fiber tissue from April to May. Then the NDVI increased until the August and then decreased until February. The highest month was at August and the lower month was at December. The difference NDVI analysis using December and another months data was conducted, the results were provided information on the variation of vegetation coverage. The result suggest that a relationship established between the LAI and NDVI in 2004.

• Radiation Oncology Journal
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• 제33권3호
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• pp.242-249
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• 2015

Purpose: The purpose of this study is to compare the dosimetry of electron beam (EB) plans and three-dimensional helical tomotherapy (3DHT) plans for the patients with left-sided breast cancer, who underwent breast conserving surgery. Materials and Methods: We selected total of 15 patients based on the location of tumor, as following subsite: subareolar, upper outer, upper inner, lower lateral, and lower medial quadrants. The clinical target volume (CTV) was defined as the area of architectural distortion surrounded by surgical clip plus 1 cm margin. The conformity index (CI), homogeneity index (HI), quality of coverage (QC) and dose-volume parameters for the CTV, and organ at risk (OAR) were calculated. The following treatment techniques were assessed: single conformal EB plans; 3DHT plans with directional block of left anterior descending artery (LAD); and 3DHT plans with complete block of LAD. Results: 3DHT plans, regardless of type of LAD block, showed significantly better CI, HI, and QC for the CTVs, compared with the EB plans. However, 3DHT plans showed increase in the $V_{1Gy}$ at skin, left lung, and left breast. In terms of LAD, 3DHT plans with complete block of LAD showed extremely low dose, while dose increase in other OARs were observed, when compared with other plans. EB plans showed the worst conformity at upper outer quadrants of tumor bed site. Conclusion: 3DHT plans offer more favorable dose distributions to LAD, as well as improved target coverage in comparison with EB plans.

• Nuclear Engineering and Technology
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• 제54권4호
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• pp.1414-1420
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• 2022

High dose rate (HDR) brachytherapy treatment planning usually involves optimization methods to deliver uniform dose to the target volume and minimize dose to the healthy tissues. Four optimizations were used to evaluate the high-risk clinical target volume (HRCTV) coverage and organ at risk (OAR). Dose-volume histogram (DVH) and dosimetric parameters were analyzed and evaluated. Better coverage was achieved with PGO (mean CI = 0.95), but there were no significant mean CI differences than GrO (p = 0.03322). Mean EQD₂ doses to HRCTV (D₉₀) were also superior for PGO with no significant mean EQD₂ doses than GrO (p = 0.9410). The mean EQD₂ doses to bladder, rectum, and sigmoid were significantly higher for NO plan than PO, GrO, and PGO. PO significantly reduced the mean EQD₂ doses to bladder, rectum, and sigmoid but compromising the conformity index to HRCTV. PGO was superior in conformity index (CI) and mean EQD₂ doses to HRCTV compared with the GrO plan but not statistically significant. The mean EQD₂ doses to the rectum by PGO plan slightly exceeded the limit from ABS recommendation (mean EQD₂ dose = 78.08 Gy EQD₂). However, PGO can shorten the treatment planning process without compromising the CI and keeping the OARs dose below the tolerance limit.