• 한국의류학회지
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• 제39권5호
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• pp.755-764
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• 2015

This study investigates if the relationships between hemline and macro-economic factors (rGDP, recession, and unemployment) are still applicable as well as analyzes time lags that reflect economic factors on the hemline index using U.S. data. The hemline theory and fashion cyclical theory were applied to propose the relationships studied. The data for the hemline measurements of women's day-wear were obtained from US Vogue spring and fall editions from 1950 to 2014. Data were standardized by dividing the length from shoulder to hemline by the length from the shoulder to ankle. I aggregated 2260 samples and hemline data to create a yearly average. This study used OLS of Stata 13 program to explore the relationship between macro-economic factors and hemline. The main findings were the recession and unemployment influenced hemline length for four years in a positive direction. Furthermore, the effects of previous recession and unemployment on the current hemline were very close to the significant level respectively. This finding supports the hemline theory in that a recessionary economy is related to longer hemlines and hemlines become shorter in flourishing economic periods.

• 대한지하수환경학회지
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• 제3권1호
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• pp.21-26
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• 1996

5대강 유역의 28개 관측지점의 수위와 유량자료를 이용하여 추정된 지하수 함양량 즉 지하수 유출량은 90억 m$^3$/년이고, 그것은 지하수 개발가능량과 같은 개념이다. 일유출수문곡선의 분석을 통하여 우리나라 지하수 수문년 2월말에 시작됨을 알 수 있었다. 감수계수(k)는 유역면적과 관계없이 거의 일정한 값을 가지므로, 거시적 관점에서 지하수유출에 영향을 미치는 유역은 거의 균질하다고 할 수 있다. 또한 4월 감수기간에서 증발산량이 상대적으로 많이 발생하므로, 4월 감수곡선이 9월 감수곡선보다 급격히 감수함을 확인할 수 있었다.

• Journal of Periodontal and Implant Science
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• 제44권6호
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• pp.300-306
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• 2014

Purpose: A laterally positioned flap (LPF) combined with a subepithelial connective tissue graft (SCTG) is one of the conventional approaches for resolving gingival recession defects, with the advantages of flap flexibility and extended coverage of the tissue graft. However, thus far, evidence is lacking for the use of this technique for the treatment of advanced gingival recession defects. This report discusses three Miller class III cases with interproximal bone loss and wide and deep defects treated with a combination procedure of a modified laterally positioned flap (mLPF) and SCTG. Methods: mLPF combined with SCTG was performed for each case. The defect size and the degree of hypersensitivity at baseline and the final appointment in each case were documented. Results: The three cases had a mean initial defect of $7.7{\pm}1.5mm$ and a mean residual defect of $1.7{\pm}1mm$ at the 6-, 3-, and 36-month follow-up, respectively, after the root coverage surgery. The symptom of hypersensitivity was improved, and the patients were satisfied with the clinical outcomes. Conclusions: The results demonstrated that the combination of mLPF with SCTG is promising for treating these advanced cases with respect to obtaining the expected root coverage with the gingival tissue.

• Safety and Health at Work
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• 제3권4호
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• pp.294-297
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• 2012

Previous studies on the vast increase in suicide mortality in Southeast Asia have indicated that suicide rates increase in parallel with a rise in unemployment or during periods of economic recession. This paper examines the effects of economic recession on suicidal rates amongst agriculture, fisheries, and forestry workers in Korea. Monthly time-series gross domestic product (GDP) data were linked with suicidal rates gathered from the cause of death records between1993-2008. Data were analyzed using generalized additive models to analyze trends, while a polynomial lag model was used to assess the unconstrained time lag effects of changes in GDP on suicidal rate. We found that there were significant inverse correlations between changes in GDP and suicide for a time lag of one to four months after the occurrence of economic event. Furthermore, it was evident that the overall relative risks of suicide were high enough to bring about social concern.

• Journal of Periodontal and Implant Science
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• 제38권3호
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• pp.483-492
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• 2008

Purpose: The purpose of this study was to compare clinical effect of the Langer & Langer technique, the modified Langer & Langer technique and Bruno technique. Material and Methods: 30 patients who have gingiva recession(Miller class I or class II) were carried root coverage. Langer & Langer technique(14 patients/32 tooth), modified Langer & Langer technique(5 patients/10 tooth) and Bruno technique(11 patients/18 tooth) was carried. At baseline and average 3 months after operation, it was estimated clinical index(Pocket depth, gingiva recession, clinical attachment level, keratinized gingiva, scar tissue, root coverage rate) by Williams style probe. Result: Root coverage rate is indicated Langer & Langer technique(8S%), Modified Langer & Langer technique(86%) and Bruno technique(90%). Conclusion: All three of the procedures were effective in gingival recession and improved clinical parameters.

• 대한치과교정학회지
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• 제51권3호
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• pp.217-227
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• 2021

Maxillary transverse deficiency often manifests as a posterior crossbite or edge-to-edge bite and anterior crowding. However, arbitrary arch expansion in mature patients has been considered to be challenging due to the possible periodontal adverse effects such as alveolar bone dehiscence and gingival recession. To overcome these limitations, nonsurgical maxillary expansion of the basal bone has been demonstrated in young adults. However, the age range for successful orthopedic expansion has remained a topic of debate, possibly due to the underlying individual variations in suture maturity. This case report illustrates nonsurgical, miniscrew-assisted rapid palatal expansion (MARPE) in a 60-year-old patient with maxillary transverse deficiency accompanied by anterior and posterior crossbites, crowding, and gingival recession. The use of MARPE allowed relief of crowding and correction of the crossbite without causing significant periodontal adverse effects.

• Wind and Structures
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• 제36권2호
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• pp.105-120
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• 2023

The present study is performed to find the effect of corner recession on a square plan-shaped tall building. A series of numerical simulations have been carried out to find the two orthogonal wind force coefficients on various model configurations using Computational Fluid Dynamics (CFD). Numerical analyses are performed by using ANSYS-CFX (k-ℇ turbulence model) considering the length scale of 1:300. The study is performed for 0° to 360° wind angle of attack. The CFD data thus generated is utilised to fit parametric equations to predict alongwind and crosswind force coefficients, C_fx and C_fy. The precision of the parametric equations is validated by employing a wind tunnel study for the 40% corner recession model, and an excellent match is observed. Upon satisfactory validation, the parametric equations are further used to carry out multiobjective optimization considering two orthogonal force coefficients. Pareto optimal design results are presented to propose suitable percentages of corner recession for the study building. The optimization is based on reducing the alongwind and crosswind forces simultaneously to enhance the aerodynamic performance of the building.

• 한국콘텐츠학회논문지
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• 제18권9호
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• pp.366-374
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• 2018

본 논문에서는 기업이 경영활동들에 대해 생각하는 중요성 정도를 경기 침체 전후로 구분하여 경영성과에 유의한 영향을 미치는 경영활동 요인을 발견하고자 한다. 또한, 기업이 포함되어 있는 산업별로, 기업이 참여하는 정부 지원정책 유형별로 경영활동별 중요도가 경영성과에 미치는 영향을 분석하고자 한다. 분석 결과에 따르면, 경기침체 이전과 이후에 동일하게 주로 '국내 외부 기술 도입'과 '신제품 출시' 등의 경영활동이 중요하다고 생각할수록 매출액에 유의한 영향을 주고, 추가적으로 경기침체 이전에는 '외국 외부 기술 도입' 활동이, 경기침체 이후에는 '자금조달' 활동이 매출액에 유의한 영향을 주는 것으로 나타났다. 대기업과 중소기업, IT기업과 비IT기업, 연구개발 투자 비중이 높은 기업과 낮은 기업, 그리고 참여한 정부 지원정책이 다른 기업별로 매출액에 영향을 주는 경영활동은 서로 다른 결과가 나타났다. 즉, 경영성과를 제고할 수 있는 경영활동의 지원은 모든 기업에게 공통적으로 제공되는 것보다는 기업의 특성을 고려하여 적절한 방법으로 이루어져야 한다는 것을 확인할 수 있다.

• 한국콘텐츠학회논문지
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• 제18권10호
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• pp.498-506
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• 2018

경기 상황에 따라 연구개발 활동을 보는 기업의 시각이 다를 수 있음을 고려해 본 논문에서는 경기 침체 전후로 구분하여 기업이 연구개발 정책들에 대해 생각하는 중요성 정도가 경영성과(매출액)에 유의한 영향을 미치는 관계를 분석하고자 한다. 또한, 기업이 포함되어 있는 산업별로, 연구개발 투자 비중 별로, 기업이 참여하는 정부 지원정책 유형별로 연구개발 정책별 중요도 인식이 경영성과에 미치는 영향이 어떻게 다른 지를 비교하고자 한다. 설문조사를 실시하여 실증 분석한 결과에 의하면, 경기침체 전후 동일하게 '글로벌 시장 및 기술 정보 제공'을 중요하게 생각할수록 경영성과가 증가하며, 경기침체 이전에 유의한 영향을 주었던 '자체 기술개발에 대한 지원', '외국과의 기술협력 강화', '계약 및 지적재산권 보호 시스템의 강화'에 대한 중요성 인식은 경기침체 이후에는 경영성과에 유의한 영향을 주지 않는 것으로 나타났다. 본 논문의 분석결과는 경기 상황에 따라 어느 연구개발 활동이 원활하게 수행될 수 있도록 정책적으로 지원할 것인지를 결정하는 데에 의미 있는 시사점을 줄 수 있을 것이다.

• Journal of Construction Engineering and Project Management
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• 제1권3호
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• pp.1-8
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• 2011

Available data on the recent global financial crisis (GFC) show that it lasted between the second quarter (Q2) of 2007 and the fourth quarter (Q4) of 2009. Australia is one of the first economies to fully recover from this crisis. This study explorles the role played by the Australian construction industry in stimulating economic growth during the recession. In order to investigate the macro-variability trend during the financial crisis, data were collected and analysed relating to the quarterly GDP of Australia and selected countries between Q1 2000 and Q4 2009. Specifically, changes in the construction industry's GDP were compared with aggregate GDP changes in Australian economy and similar indices in the 'Group of 7' (G7) countries and Organisation for Economic Co-operation and Development (OECD) countries. Moreover, specific attention was focused on Germany, France, Japan, United States of America (USA) and United Kingdom (UK). Graphical and Pearson's correlation methods were used to analyse the relationships between changes in construction GDP and Australia's overall economic growth during the recession. In addition, an attempt was made to develop a regression model for predicting economic growth during the recent recession using changes in gross fixed capital formation (GFCF), changes in construction GDP and the impact of these changes on national economy. Analysis shows a slight contraction in construction activities during the crisis; however construction triggered significant growth in the economy during the crisis period and afterwards. This appears to be the major difference between Australia and other major economies that have experienced a longer recession.