• 한국재난관리표준학회지
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• 제2권2호
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• pp.75-83
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• 2009

암반사면에 대한 표면조사 시에는, 암반 사면파괴로 인한 재해의 원인이 될 수 있는 파쇄대에서의 응력이완, 노출되지 않은 불연속면 등의 요인들을 고려하지 못하는 한계가 있다. 이에 본 고에서는 사면의 절취 또는 절취사면의 유지관리에 있어서 사면 안정성에 대한 판단을 도와 사면 파괴로 인한 재해를 예방하는 방안을 제시하고자 한다.

• 한국인터넷방송통신학회논문지
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• 제17권1호
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• pp.261-268
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• 2017

모바일 스마트 플랫폼 중심의 ICT 기술의 발전은 협력적 소비에 기반을 둔 공유경제 플랫폼을 출현시키고 있다. 본 연구에서는 2008년부터 2016년 현재까지 상용화된 공유 경제 플랫폼에 있어서 성공과 실패에 영향을 미치는 요인이 무엇인지 분석하고 공유 경제 플랫폼이 활성화 되기 위하여 필요한 정책적 요인이 무엇인지 제시하고자 한다. 이를 위하여 성공한 공유경제 플랫폼 사례와 실패한 사례에 대한 분석을 진행하고, 성공과 실패에 영향을 미치는 주요 변수를 도출한 후 이를 기반으로 ID 3 알고리즘 기반의 귀납적 분석을 실시하고자 한다. 이를 통하여 공유 경제 플랫폼의 성공과 실패에 있어서의 규칙들을 도출하여, 공유경제 플랫폼의 상업적 성공을 위하여 필요한 정책적 요인이 무엇인지 제시하고자 한다.

• 동의생리병리학회지
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• 제20권4호
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• pp.1085-1088
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• 2006

This research is purposed to find congenital and acquired factors affected percentile of height and weight. One hundred foriy two children visited to Hamsoa oriental medical clinic in Gwangju for about one year. The majority of them complaint failure to thrive and answered questionarre examined state of sleeping, living, health and diet. The mean age of them is $8.2{\pm}3.2$ years old. The mean percentile of height is $24.8{\pm}22.4$, that of male is $20.9{\pm}20.6$ and that of female is $28.7{\pm}23.5$. The highest correlation coefficient between percentile of height and congenital factors is height of mother, it is 0.289. By regression analysis, the significant congenital factors affected percentile of height are gestational age, height of fathe andr height of mother, that of weight are gestational age, height of father and height of mother. The significant correlation coefficient between percentile of height and weight and acquired factors is health and diet items.

• The Journal of Asian Finance, Economics and Business
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• 제8권5호
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• pp.727-739
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• 2021

Over the past decades, the Jordanian government has made great efforts to help poor women start small businesses by providing microcredit and facilitating financial services. Although in Jordan almost hundreds of thousands of women have the ability to contribute more fully to their economy, they are reluctant to do so. Women's participation in economic activities in 2016 was only 13.2%, while the unemployment rate for Jordanian women was 24.1%. The decline in women's participation in small business management has gradually become an important issue following the trial of more than 13,000 Jordanian women for non-payment of their micro-loans. This study aims to identify the factors that hinder Jordanian women from achieving job stability. In this qualitative study, a semi-structured interview method with sixteen open-ended questions was used to collect relevant data. A purposeful sampling method is also used to select participants. To analyze the data, this study used NVivo 11 software as a method. Using System Theory, this study showed that women's failure depends on three factors: women entrepreneurs, the environment around women entrepreneurs, and micro-financial institutions. Findings of this study suggest that strengthen women's entrepreneurship sustainability and minimize the risk of failure should be done through integrated strategies include these three domains.

• Journal of the Korean Data and Information Science Society
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• 제5권2호
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• pp.87-94
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• 1994

In this paper, we consider optimum plan to determine stress change times under the three-step stress PALTs, assuming that each test units follows an exponential distribution. The tampered random variable(TRV) model for the three-step stress PALTs setup are introduced, and maximum likelihood estimators(MLEs) of the failure rate and the acceleration factors are obtained. The change times to minimize the generalized asymptotic variance(GAVR) of MLEs of the failure rate and the acceleration factors are proposed for the three-step stress PALTs.

• 한국항공운항학회지
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• 제18권4호
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• pp.38-43
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• 2010

A continuing challenge in the aviation industry is how to safely keep aircraft in service longer with limited maintenance budgets. Therefore, all the advanced countries in aircraft technologies put great efforts in prediction of failure rate in parts and system, but in the domestic aircraft industry is lack of theoretical and experimental research. Prediction of failure rate provides a rational basis for design decisions such as the choice of part quality levels and derating factors to be applied. For these reasons, analytic prediction of failure rate is essential process in developing aircraft structure. In this paper, a procedure for prediction of failure rate for aircraft structural parts is presented. Cargo door kinematic parts are taken to illustrate the process, in which the failure rate for Hook part is computed by using Monte Carlo Simulation along with Response Surface Model, and system failure rate is obtained afterwards.

• 한국신뢰성학회지:신뢰성응용연구
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• 제11권4호
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• pp.387-398
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• 2011

$217Plus^{TM}$, a newly developed as a surrogate of the MIL-HDBK-217, may be widely applied for reliability predictions of electronic systems. In this study, we performed sensitivity study of the $217Plus^{TM}$ system model to various parameters. Specific attention was put to logistics model and its behavior has been examined in terms of non-component failure causes. We first briefly explained the $217Plus^{TM}$ methodology with system level failure rate evaluation. We then applied experimental designs with several failure causes as factors. We used an orthogonal array with three levels of each parameter. Our results indicate that cannot duplicate, induced, and wear-out causes have dominant effects on the system failures and design, parts, and system management have much less but a little strong effects. The results in this study not only figure out the behavior of the predicted failure rate as functions of failure causes but provide meaningful guidelines for practical applications.

• Coupled systems mechanics
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• 제3권4호
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• pp.345-365
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• 2014

A significant problem met in engineering practice when designing cable-stayed bridges is the failure of cables. Many different factors can lead to sudden failure of cables, such as corrosion, continuous friction or abrasion, progressive and extended crevice created by fatigue and finally an explosion caused by sabotage or accident, are some of the causes that can lead to the sudden failure of one or more cables. This paper deals with the sudden failure of cables in a special form of cable-stayed bridges with a single line of cables anchored at the central axis of the deck's cross-section. The analysis is carried out by the modal superposition technique where an analytical method developed by the authors in a previous work has been employed.

• Radiation Oncology Journal
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• 제33권1호
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• pp.29-35
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• 2015

Purpose: To analyze the prognostic factors for survivals and to evaluate the impact of postoperative whole pelvic radiotherapy (WPRT) on pelvic failure in patients with uterine sarcoma treated with radical surgery. Materials and Methods: We retrospectively analyzed 75 patients with uterine sarcoma who underwent radical surgery with (n = 22) or without (n = 53) radiotherapy between 1990 and 2010. There were 23 and 52 patients with carcinosarcoma and non-carcinosarcoma (leiomyosarcoma, 22; endometrial stromal sarcoma, 25; others, 5), respectively. The median follow-up period was 64 months (range, 17 to 269 months). Results: The 5-year overall survival (OS) and pelvic failure-free survival (PFFS) of total patients was 64.2% and 83.4%, respectively. Multivariate analysis revealed that mitotic count (p = 0.006) was a significant predictor of OS. However, factors were not found to be associated with PFFS. On analyzing each of the histologic subtypes separately, postoperative WPRT significantly reduced pelvic failure in patients with carcinosarcoma (10.0% vs. 53.7%; p = 0.046), but not in patients with non-carcinosarcoma (12.5% vs. 9.9%; p = 0.866). Among the patients with carcinosarcoma, 4 patients (17%) had recurrence within the pelvis and 3 patients (13%) had recurrence in other sites as an initial failure, whereas among the patients with non-carcinosarcoma, 3 patients (6%) experienced pelvic failure and 13 patients (25%) experienced distant failure. Conclusion: The most significant predictor of OS was mitotic count. Based on the improved PFFS after postoperative WPRT only in patients with carcinosarcoma and the difference in patterns of failure between histologic subtypes, optimal adjuvant treatment options should be offered to patients based on the risk of recurrence patterns.

• 한국임상약학회지
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• 제24권2호
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• pp.115-125
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• 2014

Purpose: The purpose of the present study was to assess the incidence of the potentially inappropriate medication (PIM) use in Korean elderly patients with heart failure, and to evaluate factors that influence PIM use. Method: Korean National Health Insurance claims database between January 2009 and December 2009 was used. Using 2012 updated Beers criteria, PIM use in heart failure patients aged 65 years or older was examined. Result: The incidence of PIM use in elderly heart failure patients was higher than in overall elderly patients. Among the 12,759 elderly patients with heart failure, 46.2% of study subjects were prescribed PIM(s) at least once. The number of PIM per 10 medications that patients received per patient was 1.53. The most commonly used PIMs in elderly heart failure patients were benzodiazepines (30.9%), non-steroidal anti-inflammatory drugs (NSAIDs) including COX-2 inhibitors (16.3%), digoxin (9.9%), and spironolactone (9.0%). Women (odds ratio, 1.20; 95% CI, 1.17-1.24), medical aid (odds ratio, 1.11; 95% CI, 1.08-1.13), and long-term facilities (odds ratio, 2.69; 95% CI, 2.44-2.96) were revealed to be important factors associated with PIM use. In addition, patient's age also seems to influence PIM use. Conclusion: Elderly heart failure patients are at a greater risk for adverse drug events attributed by inappropriate medication use. Efforts to increase awareness of PIM use in elderly heart failure patients are needed. In addition, various comprehensive strategies and policies to identify and prevent PIM use should be established nationwide.