• Journal of Chest Surgery
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• 제44권6호
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• pp.418-422
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• 2011

Background: It has recently become most general to use the small bore catheter to perform closed thoracostomy in treating iatrogenic pneumothorax. This study was performed for analysis of the efficacy of treatment methods by using small bore catheter such as 7 F (French) central venous catheter, 10 F trocar catheter, 12 F pigtail catheter and for analysis of the appropriateness of each procedure. Materials and Methods: From March 2007 to February 2010, Retrospective review of 105 patients with iatrogenic pneumothorax, who underwent closed thoracostomy by using small bore catheter, was performed. We analyzed the total success rate for all procedures as well as the individual success rate for each procedure, and analyzed the cause of failure, additional treatment method for failure, influential factors of treatment outcome, and complications. Results: The most common causes of iatrogenic pneumothorax were presented as percutaneous needle aspiration(PCNA) in 48 cases (45.7%), and central venous catheterization in 26 cases (24.8%). The mean interval to thoracostomy after the procedure was measured as 5.2 hours (1~34 hours). Total success rate of thoracostomy was 78.1%. The success rate was not significantly difference by tube type, with 7 F central venous catheter as 80%, 10 F trocar catheter as 81.6%, and 12 F pigtail catheter as 71%. Twenty one out of 23 patients that had failed with small bore catheter treatment added large bore conventional thoracostomy, and another 2 patients received surgery. The causes for treatment failure were presented as continuous air leakage in 12 cases (52.2%) and tube malfunction in 7 cases (30%). The causes for failure did not present significant differences by tube type. Statistically significant factors affecting treatment performance were not discovered. Conclusion: Closed thoracostomy with small bore catheter proved to be effective for iatrogenic pneumothorax. The success rate was not difference for each type. However, it is important to select the appropriate catheter by considering the patient status, pneumothorax aspect, and medical personnel in the cardiothoracic surgery department of the relevant hospital.

• 디지털융복합연구
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• 제19권8호
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• pp.133-139
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• 2021

본 연구는 사회적 지지의 중요성을 인식하고 사회적 지지가 성취동기를 매개로 주관적 웰빙에 미치는 영향을 검증하는데 초점을 두었다. 이러한 과정에 있어서 주관적 웰빙을 향상시킬 수 있는 핵심 변수로 성취동기의 성공추구 동기와 실패회피 동기의 매개효과를 명확히 규명하였다. 이러한 연구목적을 달성하기 위해 국내 대학에 재학하고 있는 중국 유학생을 대상으로 실증분석을 실시하였다. 실증분석을 통해 사회적 지지는 성공추구 동기와 실패회피 동기를 향상시키며, 성공추구 동기와 실패회피 동기는 주관적 웰빙을 강화하는 요소로 판명되었다. 또한 사회적 지지와 주관적 웰빙 간의 관계에서 성공추구 동기와 실패회피 동기의 매개효과 및 다중매개효과를 분석한 결과, 성공추구 동기만이 부분매개 효과가 있는 것으로 나타났다. 마지막으로 본 연구를 통한 실무적 시사점을 제시함과 동시에 향후의 연구 방향에 관해서 논의하였다.

• 융합정보논문지
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• 제9권8호
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• pp.221-232
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• 2019

이 연구에서는 임용시험에서의 실패와 성공을 경험한 특수교사들의 임용시험 실패 요인과 성공 요인이 무엇인지를 탐구하였다. 24명의 특수교사들과 반구조화된 면담을 실시하였으며, 면담 자료의 연속적 비교 분석을 통해 12개의 의미 있는 주제를 추출하였다. 연구 결과를 종합하면 다음과 같다. 첫째, 특수교사들은 임용시험 실패 요인을 남 따라 하기식의 공부, 실패를 부르는 공부전략, 무조건 달달 외우기, 비효율적인 스터디, 불안함과 자신감 부족, 내가 나를 관리하지 못함에 두었다. 둘째, 특수교사들은 임용시험 성공 요인을 자신만의 공부 스타일, 올바른 공부전략, 이해와 암기의 조화, 모두가 득이 되는 스터디, 긍정적인 마음가짐, 무너지지 않는 자신만의 루틴에서 찾았다. 이러한 연구 결과를 임용시험 준비과정에서 실제적으로 활용하는 방안을 제언하였다.

• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 2010년도 춘계학술대회
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• pp.435-439
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• 2010

The purpose of this paper is to design a new management model based on the grill-formed product charscteristic area(PCA) which specify the position of products classified by the level of market and technology. This product characteristic area is composed of 9 cells and the cases sorted by market and technology are analyzed by each cell. Conclusion of this study based on many significant results gained by the various multi-variate analysis is summarized as follows; First, it can be noted that success/failure factor and progress stages are different by each cell. Second, a new management model is designed by combining the Motive Resource, Success/Failure(S/F) factors, and Progress Stages of New Product Development. Third, success products featured a balance between marketing oriented and technically oriented activities. A new attemp that combine S/F factors with development stages by each product cell will be of great usefulness for further study.

• 한국항해학회지
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• 제21권3호
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• pp.19-38
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• 1997

It is one of the important study for improving education quality to investigate School climate, Campus Life and Academic Achievement in University. This study focuses on the of success / failure attribution in academic achievement and its internal-external attribution of Maritime college students. The main purpose of this study was investigate the relationship between the perception of college climate and attribution of success and failure about college life and cadet's academic performance. The subjects were 490 cadets of freshman, sophomore and junior of Korea Maritime University. The data was analysed by Pearson's correlation, one-way and simple factorial ANOV A, $x^2$, and t-test by using SPSSWIN Ver. 7.5 programme. The major results of this study were as follows : 1. Social relationship orientation was higher than the others on the perception of college climate, while the relationship between professor and collegian was lower. 2. The most collegian recognized on the attribution of failure about the college life and the relationship between professor and collegian. But most collegian recognized on the attribution of sucess about collegian's relationship. 3. The perception of college climate and attribution of success / failure was not influenced on the student's academic performance and academic adaptability.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제27권1호
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• pp.39-47
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• 2005

The purpose of this study is to review the prognosis of the TG Osseotite implant(3i Co, USA) placed in partial edentulous area of oral cavity and to suspect the possible causes leading to failure. 124 TG Osseotite implants that had been inserted between 2000 - 2002 were followed up for 2 years(avg : 9.5 months) in function. Medical records, and radiographs were evaluated and analyzed by the over all success rate, gender and age factor, general disease, implant fixture length and diameter, implant site, bone density, and various surgical methods. Chi square test was used statistically. Of the 124 TG Osseotite implants, 9 implants(7.3%) were removed in early phase and 3 implants(2.4%) were in late phase. The cumulative survival rate was 90.2%. The failure of the TG Osseotite implant was closely related with the use of bone graft techniques such as sinus elevation or immediate implantation and not with the age, sex, general disease, implant site, bone density of implanted site. The failure of the TG Osseotite implant was well developed when it was the wide type of implant and it was inserted for single tooth replacement. The developement of peri-implantitis was the most important factor in the failure of the TG Osseotite implant.

• 한국운동역학회지
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• 제12권2호
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• pp.331-344
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• 2002

본 연구는 볼링 투구동작의 성패는 스텝과 스윙이 결정한다는 가정 하에 어프로치에서의 동작에 주안점을 두고, 볼링선수를 대상으로 자유로이 투구를 하게 하고 피험자 본인이 잘되었다고 판단하는 동작과 잘못되었다고 판단하는 투구 동작을 비교 분석하는 것이 본 연구의 목적이다. 투구동작시 어드레스에서부터 릴리즈까지의 동작을 각 스텝별로 국면을 설정하고, 3차원영상분석을 실시하여 각 스텝별로 보폭, 신체중심의 위치, 볼의 위치를 성공과 실패동작으로 나누어서 비교 분석하였다. 보폭은 성공과 실패동작에서 큰 차이를 보이지 않았으며, 4국면과 5국면에서의 보폭이 실패동작에서 크게 나타났다. 신체중심의 위치에서도 큰 차이를 보이지 않았으나 성공시가 실패시보다 상하 이동폭이 작게 나타났다. 볼의 위치는 성공과 실패시 모두 스텝중에는 3국면이 가장 낮게 나타났으며, 상하 이동폭이 적은 안정적인 투구를 하는 것으로 나타났다.

• 정보처리학회논문지D
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• 제13D권5호
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• pp.709-716
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• 2006

소프트웨어 복잡도가 증가할수록 소프트웨어 성공률은 기하급수적으로 감소하며, 반대로 실패율은 증가한다. 소프트웨어 규모 증가에 따른 실패율은 성장곡선으로 표현할 수 있다. 이 현상에 따라, 본 논문은 Gompertz 성장곡선으로 개발 성공률과 완료율을 추정하였다. 먼저, 수치적으로 제시된 $10^n$의 소프트웨어 규모를 로그값으로 변환시켜 데이터 간격을 일정하게 하였다 로그값의 소프트웨어 규모 변화에 따른 개발 성공률과 완료율의 함수관계를 유도하고자 하였다. 그러나 이 관계를 적절히 표현하는 함수를 찾지 못하였다. 따라서 본 논문에서는 개발 성공률의 역 개념인 실패율과 완료율의 역 개념인 취소율을 도입하였다. 로그값의 소프트웨어 규모 변화에 따른 개발 실패율과 취소율 관계는 성장곡선 형태를 나타내었다. 결론적으로, 개발 취소율과 실패율을 적절히 표현하는 함수로 Gompertz 성장곡선을 적용한 결과 실측 데이터를 적절히 표현할 수 있었다. 본 모델을 적용하면 특정 규모의 소프트웨어에 대한 개발 성공률과 완료율을 보다 정확히 얻을 수 있을 것이다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제46권3호
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• pp.162-173
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• 2020

Dental implants are the first option for replacement of missing teeth. Failure usually involves additional cost and procedures. As a result, the physician should limit the risk factors associated with implant failures. Implant site is one of many factors that can influence the success or failure of dental implants. The association between early implant failure (EIF) and implant site has yet to be documented. This review aims to estimate the impact of insertion site on the percentage of EIFs. An electronic and manual search of studies that reported early failure of dental implants based on collection site. A total of 21 studies were included in the review and examined for the association between EIF and alveolar site. Subgroup analysis, including a comparison between implants inserted in four alveolar ridge regions of both jaws was performed. The early failure rate was higher for maxillary implants (3.14%) compared to mandibular implants (1.96%). Applying a random effect, risk ratio (RR), and confidence interval (CI) of 95% revealed higher failure in the maxilla compared to the mandible (RR 1.41; 95% CI [1.19, 1.67]; P<0.0001; I²=58%). The anterior maxilla is more critical for early implant loss than other alveolar bone sites. Implants in the anterior mandible exhibited the best success rate compared of the sites.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1990년도 PROCEEDINGS OF THE FIRST KOREA-JAPAN JOINT GEOTECHNICAL SEMINAR ON EXCAVATION and TUNNELING IN URBAN AREAS
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• pp.97-110
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• 1990

This paper presents a case history of a deep open cut excavation of Nakagawa section for Futuoka Subway construction which adopted observational mettled against boiling failure and completed with success by modifying construction based upon field monitoring. One of the difficult conditions for the excavation was sandy layer with high water pressure which was anticipated boiling failure. The boiling was generally considered as one of the difficult phenomena to work with the observational method because of its unpredictable catastrophic nature. Laboratory experiments showed the existence of the prefailure movements of the ground and the possibility of the application of the observational method against the boiling failure. Construction step was planned to be modified, if necessary, based upon field monitoring and was completed with success.