• 대한치과교정학회지
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• 제42권5호
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• pp.242-248
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• 2012

Objective: The aim of this study was to compare the success rates of the manual and motor-driven mini-screw insertion methods according to age, gender, length of mini-screws, and insertion sites. Methods: We retrospectively reviewed 429 orthodontic mini-screw placements in 286 patients (102 in men and 327 in women) between 2005 and 2010 at private practice. Age, gender, mini-screw length, and insertion site were cross-tabulated against the insertion methods. The Cochran-Mantel-Haenszel test was performed to compare the success rates of the 2 insertion methods. Results: The motor-driven method was used for 228 mini-screws and the manual method for the remaining 201 mini-screws. The success rates were similar in both men and women irrespective of the insertion method used. With respect to mini-screw length, no difference in success rates was found between motor and hand drivers for the 6-mm-long mini-screws (68.1% and 69.5% with the engine driver and hand driver, respectively). However, the 8-mmlong mini-screws exhibited significantly higher success rates (90.4%, p < 0.01) than did the 6-mm-long mini-screws when placed with the engine driver. The overall success rate was also significantly higher in the maxilla (p < 0.05) when the engine driver was used. Success rates were similar among all age groups regardless of the insertion method used. Conclusions: Taken together, the motor-driven insertion method can be helpful to get a higher success rate of orthodontic mini-screw placement.

• The Korean Journal of Pain
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• 제9권1호
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• pp.126-129
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• 1996

Background: Advantages of paramedian approach over midline approach include less tissue trauma and less dependence on patient's ability to assume a fetal position. When midline approach fails in patients who are difficult to take a position with lumbar spine flexed, paramedian approach to interlaminar space may succeed. Methods: Success rates of spinal anesthesia were measured for 47 flexed patients by midline approach, 48 flexed patients by paramedian approach, 23 straightened patients receiving spinal anesthesia by midline approach, and 23 straightened patients by paramedian approach. Results: Success rates in flexed patients were 100% by midline approach and 100% by paramedian approach. Success rates for straightened patients were 13.0% by midline approach and 78.3% by paramedian approach. For straightened patients there were no correlations between success fate and age, weight, Ponderal Index but there were correlations between height and midline approach of spinal anesthesia. Conclusion: Pertaining to adult Koreans, success rates of spinal anesthesia for strainghtened patients were less than those for flexed patients. Success rate of paramedian approach of spinal anesthesia among strainghtened patients were better than those of midline approach.

• Journal of Veterinary Science
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• 제24권5호
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• pp.61.1-61.12
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• 2023

Background: Percutaneous renal cyst sclerotherapy (PRCS) as a treatment for renal cysts is usually performed with a high concentration of ethanol (≥ 90%). This study reviewed cases in which a lower concentration of ethanol (83%) was used for the procedure in dogs. Methods: Records of cases of renal cysts treated by sclerotherapy using 83% ethanol in dogs were reviewed. Outcomes of the treatment were evaluated by comparing volumes of renal cysts before the procedure and the volumes after treatment, using ultrasound images with the volume reduction rates classified as follows: < 50% of initial volume (failed); ≥ 50% but < 80% of initial volume (partial success); ≥ 80% but < 95% of initial volume (great success); ≥ 95% of initial volume (complete success). Results: Out of nine dog kidneys, renal cysts sclerotherapy with 83% ethanol achieved partial success in one kidney, great success in four, and complete success in the other four. No side effect was observed. The mean of the volume-reduction rates was 90.00 ± 11.00 while the minimum and maximum reduction rates were 65% and 100%, respectively. Conclusions: The lower ethanol concentration (83%) is good for disinfecting kidneys in PRCS.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 International Symposium on GPS/GNSS Vol.2
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• pp.243-246
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• 2006

This study investigates the improvement in the theoretical success rate of the integer ambiguity resolution in GPS/GNSS carrier-phase positioning by using many visible satellites. It estimates the dependence of the rate on the baseline length in relative positioning under the condition of the use of double/triple-frequency navigation signals. The calculation results show that the use of 14 navigation satellites (i.e., seven GPS and seven Galileo ones) remarkably improves the success rate under the condition of very short baseline length, compared with the use of seven GPS ones. The numerical reliability of the calculated success rates is strictly tested by examining the tightness of the union and minimum-distance bounds to the rate. These bounds are also shown to be effective to investigate the realization of the high success rates.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제49권1호
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• pp.13-20
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• 2023

Objectives: Ultra-wide implants may be used as a replacement if existing implants fail. This study was conducted to evaluate the factors influencing the prognosis and failure of ultra-wide implants. Patients and Methods: This study evaluated whether sex, age, site, diameter, length, additional surgery, implant stability (primary and secondary), and reason for ultra-wide implant placement affect the 5-year survival and success rates and marginal bone loss (MBL) of ultra-wide implants. Seventy-eight ultra-wide implants that were placed in 71 patients (39 males and 32 females) from 2008 to 2010 were studied. One-way ANOVA analysis was conducted to evaluate the statistical significance of MBL according to the patient's sex, implant site, and diameter. Independent sample t-tests were used to determine the statistical significance of MBL analysis which was used to determine the significance of the 5-year success and survival rates related to the variables. One-way ANOVA was conducted to evaluate the statistical significance of sex, implantation site, diameter, and MBL. Independent sample t-tests were used to evaluate the correlation between implantability and MBL for implantation reasons, while additional surgery, length, and Kaplan-Meier analysis were used to evaluate 5-year survival and success rates. Results: The mean age of patients was 54.2 years with a survival rate of 92.3% and a success rate of 83.3% over a mean 97.8-month period of observation. MBL averaged 0.2 mm after one year of prosthetic function loading and 0.54 mm at the time of final observation. Success rates correlated with primary stability (P=0.045), survival rates correlated with secondary stability (P=0.036), and MBL did not correlate with any variables. Conclusion: Ultra-wide implants can be used to achieve secure initial fixation in the maxillary and mandibular molar regions with poor bone quality or for alternative purposes in cases of previous implant failure.

• Journal of Multimedia Information System
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• 제9권2호
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• pp.103-112
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• 2022

Background: A presentation attack places the printed image or displayed video at the front of the sensor to deceive the biometric recognition system. Usually, presentation attackers steal a genuine user's biometric image and use it for presentation attack. In recent years, reconstruction attack and adversarial attack can generate high-quality fake images, and have high attack success rates. However, their attack rates degrade remarkably after image shooting. Methods: In order to comprehensively analyze the threat of presentation attack to palmprint recognition system, this paper makes six palmprint presentation attack datasets. The datasets were tested on texture coding-based recognition methods and deep learning-based recognition methods. Results and conclusion: The experimental results show that the presentation attack caused by the leakage of the original image has a high success rate and a great threat; while the success rates of reconstruction attack and adversarial attack decrease significantly.

• 한국IT서비스학회지
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• 제16권4호
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• pp.47-64
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• 2017

Three years after establishment, companies are said to face a period of risk called the "valley of death." To start a venture company and make it sustainable, the chance of failure must be minimized. According to an in-depth assessment report on special taxation in 2015, the one-year survival rate of Korean companies was about 60 percent and the five-year survival rate about 30%. These rates are low compared to those of major OECD member countries. Worse, such rates in Korea are decreasing year by year. The purpose of this study is to classify the success factors behind venture companies into human capital, social capital and financial capital, and verify through empirical analysis the factors influencing the success of venture companies based on the mediating roles of capability of the startup team and that for innovation. To find the success factors behind venture companies, this study first examined the theories derived from previous studies. SPSS 21 was used as the study method, while descriptive statistics, exploratory factor analysis and CMB test were conducted. In addition, SmartPLS 2 was used for confirmatory factor analysis, hypothesis test, mediation effect. The results of this study can help efforts toward job creation and economic revitalization pursued by the creative economy policy of the incumbent Korean administration. They can also be used as the cornerstone for venture companies in their pursuit of success.

• Journal of Korean Dental Science
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• 제6권2호
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• pp.67-77
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• 2013

Purpose: The purpose of this study was to evaluate the survival and success rates of Korean Osstem implants US II Plus, GS II following loading period. Materials and Methods: Dental records were obtained in total 201 patients who were treated with Korean Osstem implants US II Plus, GS II on both maxillary and mandibular anterior and posterior areas in six different clinics for 2 years from January 2007 to December 2008. Total 430 implants were evaluated clinically and radiographically using predefined success criteria prospectively and following results were obtained. Result: US II Plus, GS II implants showed high survival rates of more than 99% and high success rates more than 90% independent of loading period. As a result of cross analysis to evaluate clinical significance between implant loading period and success rate, the P-value of US II Plus was 0.10 (P>0.05), and the P-value of GS II was 0.17 (P>0.05), which showed no statistical significance. Bone quality, smoking, and edentulous state are factors that can affect the survival and success rates following differently loaded implants, but did not significantly affect in this study. Conclusion: These results suggest that selection of loading period of Korean Osstem implants US II Plus, GS II would be done carefully considering implant install area, the quality alveolar bone, the state of edentulous ridge and experience of operator, though they showed clinically good results on both maxillary and mandibular anterior and posterior areas.

• 디지털융복합연구
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• 제12권1호
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• pp.445-455
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• 2014

본 연구는 보건소 금연클리닉의 신규등록자와 재등록자의 금연성공 요인을 비교분석하여, 향후 보건소 금연 사업의 효율성 제고를 위한 개선방안을 제안하고자 하였다. 연구자료는 2009년 7월 16일부터 2010년 7월 15일까지 전국 253개 보건소 금연클리닉에 등록하여 6개월 이상 서비스를 이용한 흡연자 319,908명이며, 재등록자와 신규등록자로 구분한 후, 6개월 금연성공여부를 종속변수로 하여 ${\chi}^2$검정과 t검정, 로지스틱 회귀분석을 실시하였다. 연구결과에 따르면 조사대상자들의 6개월 금연성공률은 재등록자(51.6%)가 신규등록자(48.7%) 보다 높게 나타났고, 금연성공에 영향을 미치는 공통적인 요인으로는 성, 연령, 사회보장유형, 거주지역, 하루 평균 흡연량, 처음 흡연연령, 니코틴 의존도, 서비스 내용 등이었다. 특히 보건소 금연클리닉에서 제공되는 서비스 내용 중 신규등록자는 행동요법만 제공하는 경우가 금연성공률이 높은 반면 재등록자는 행동요법과 약물요법을 병행하는 경우가 금연성공률이 높았다. 이에 따라 보건소 금연클리닉을 운영함에 있어 대상자의 특성을 고려한 다양한 금연지원서비스를 제공할 필요가 있으며, 등록유형에 따라 차별화된 서비스 제공의 필요성을 제언한다.

• 대한안과학회지
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• 제59권11호
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• pp.1001-1008
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• 2018

목적: 눈물길미세내시경을 이용한 실리콘관삽입술과 기존의 코내시경만으로 시행한 방법 간의 성공률을 비교하고자 하였다. 대상과 방법: 2014년 1월부터 2017년 6월까지 본원에서 실리콘관삽입술을 시행한 환자들을 대상으로 하였다. 술 전 눈물소관 관류검사와 눈물주머니조영술로 진단하였다. 술 후 3개월 때 실리콘관을 제거하였고 4, 12개월 때 성공률을 내시경 사용에 따라 두 군으로 나눠 분석하였다. 결과: 총 55명, 80안으로 술 전 진단에서 사용군은 부분폐쇄 26안, 완전폐쇄 14안, 미사용군은 부분폐쇄 35안, 완전폐쇄 5안이었다(p=0.018). 술 후 4, 12개월 때 성공률은 사용군에서는 87.5%, 80.0%, 미사용군에서는 72.0%, 62.1%였다(p=0.546, p=0.565). 부분폐쇄에서 사용군과 미사용군의 성공률은 4개월 때 92.3%, 82.9%, 12개월 때 71.4%, 62.9% (p=0.448, p=1.000), 완전폐쇄에서 성공률은 4개월 때 78.6%, 60.0%, 12개월 때 72.7%, 33.3%였다(p=0.570, p=0.505). 눈물길미세내시경의 사용과 폐쇄의 위치 및 정도의 차이가 술 후 4, 12개월 때 성공률에 유의한 영향을 미침을 확인하였다(p=0.001, p=0.022). 결론: 눈물길미세내시경을 이용한 실리콘관삽입술은 기존의 것에 비하여 성공률이 유의하게 높지는 않았으나, 코눈물길의 구조를 실시간으로 확인하여 적절한 진단 및 치료가 동시에 가능하다. 완전폐쇄로 진단되었던 환자들에게도 좋은 성공률을 보여 그 적용 범위를 확대시켜 비침습적인 치료를 시행할 수 있을 것이다.