• 대한치과보존학회:학술대회논문집
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• 대한치과보존학회 2001년도 춘계학술대회
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• pp.257-257
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• 2001

Failures occur in dentistry as a result of manny factors some of which can be controlled by the operator whilst others are unavoidable. The long-term success rate of endodontic treatment has often been thought to be very high although studies reported in the literature do not support this perception. The number of failure can be reduced by adhereing to accepted treatment procedures and by avoiding 'short cut'. Endodontic disaters are usually related to operator errors and they mat have detrimental effects on the outcome of treatment in the long term, eventually becoming catastrophes. Endodontic disasters will require special techniques to salvage them whereas catastrophes usually result in loss of the tooth and every effort should be made to prevent such problems from occurring. This presentation will cover common errors in endodontic procedures especially access opening, canal negotiation, canal irrigation, canal preparation, canal filling, post preparation.ration.

• 대한간호학회지
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• 제42권4호
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• pp.568-578
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• 2012

Purpose: The purpose of this cross-sectional study was to examine current status of IT-based medication error prevention system construction and the relationships among system construction, medication error management climate and perception for system use. Methods: The participants were 124 patient safety chief managers working for 124 hospitals with over 300 beds in Korea. The characteristics of the participants, construction status and perception of systems (electric pharmacopoeia, electric drug dosage calculation system, computer-based patient safety reporting and bar-code system) and medication error management climate were measured in this study. The data were collected between June and August 2011. Descriptive statistics, partial Pearson correlation and MANCOVA were used for data analysis. Results: Electric pharmacopoeia were constructed in 67.7% of participating hospitals, computer-based patient safety reporting systems were constructed in 50.8%, electric drug dosage calculation systems were in use in 32.3%. Bar-code systems showed up the lowest construction rate at 16.1% of Korean hospitals. Higher rates of construction of IT-based medication error prevention systems resulted in greater safety and a more positive error management climate prevailed. Conclusion: The supportive strategies for improving perception for use of IT-based systems would add to system construction, and positive error management climate would be more easily promoted.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1987년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 16-17 Oct. 1987
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• pp.96-99
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• 1987

In the way of perception and depth finding of 3-D scene stereo vision is one of the best ways. Matching is important problem of stereo vision. In this paper we develop an algorithm that is adaptable to errors and computation time. And we demonstrate the way of matching.

• 한국산학기술학회논문지
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• 제20권3호
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• pp.71-81
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• 2019

이 연구의 목적은 성격 5요인에 기초하여 교육대학교 학생의 잠재적 성격 특성 유형을 확인하고, 성격 특성 에 따라 심리적 안녕감, 대학생활적응에 차이가 있는지 살펴보는 것이다. 분석 자료는 A 교육대학교 1~4학년 1,295명의 데이터를 활용하였다. 교육대학교 학생의 잠재적 성격 특성 유형을 확인하기 위해 잠재프로파일분석을 활용하였으며, 분류된 성격 특성 잠재 집단에 따른 심리적 안녕감, 대학생활적응 차이 검증을 위해 다변량분산분석방법을 사용하였다. 잠재프로파일분석결과 교육대학교 학생의 성격 특성은 신경과민성, 외향성, 개방성, 우호성, 성실성의 다중 속성에 의해 (1) 높은 수준의 적응적 성격(신경과민성 하, 나머지 성격 요인 상), (2) 중간 수준의 적응적 성격(성격 5요인 모두 중), (3) 낮은 수준의 적응적 성격(신경과민성 상, 나머지 성격 요인 하)의 세 개 유형으로 구분하는 것이 적합한 것으로 확인되었다. 세 집단에 따라 성격 5요인에 유의한 차이가 나타났는데, 높은 수준의 적응적 성격 집단이 중간과 낮은 수준의 적응적 성격 집단보다, 중간이 낮은 수준의 적응적 성격 집단보다 신경과민성은 낮고 외향성, 개방성, 우호성, 성실성이 높은 것으로 확인되었다. 둘째, 성격 특성 잠재 집단에 따라 심리적 안녕감과 대학생활적응에 차이가 있는지 확인한 결과 높은 수준의 적응적 성격 집단은 중간과 낮은 수준의 적응적 성격 집단보다, 중간은 낮은 수준의 적응적 성격 집단보다 심리적 안녕감과 대학생활적응 하위 요인 모두에서 점수가 더 높은 것으로 나타났다. 본 연구 결과는 교육대학교 학생의 심리적 안녕감과 대학생활적응에 있어 성격 특성의 중요성을 보여주며, 교육대학교 학생의 행복한 대학생활을 위해서는 성격 특성을 고려한 교육적 개입이 필요함을 시사한다.

• 말소리와 음성과학
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• 제1권4호
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• pp.39-46
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• 2009

This study compares the perception of English high tense and lax vowels (/i, I, u, $\mho$/) by English speakers and Korean speakers of English. The four vowels were produced in /hVd/ context by a native speaker of English, and each word's vowel duration was manipulated to range from 170ms to 290ms in 30ms increments. Two English speakers and six Korean speakers of English were asked to listen to pairs of tense and lax vowel words with manipulated vowel durations and to identify the pair by choosing either heed-hid or hid-heed for front vowels and either who'd-hood or hood-who'd for back vowels. The results show that English speakers distinguished tense vowels from lax vowels with 100% accuracy regardless of the different durations, compared to 62% accuracy for Korean speakers of English. Most errors occurred for lengthened lax vowels and shortened tense vowels. The results of this study demonstrate that Korean speakers mainly rely on vowel duration as a cue to discriminate the tense and lax vowels. The theoretical and pedagogical implications of this finding are discussed.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1998년도 제13차 학술회의논문집
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• pp.329-334
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• 1998

This work is concerned with the problem of tracking a maneuvering target. In this paper, an error monitoring and recovery method of perception net is utilized to improve tracking performance for a highly maneuvering tar-get. Many researches have been performed in tracking a maneuvering target. The conventional Interacting Multiple Model (IMM) filter is well known as a suboptimal hybrid filter that has been shown to be one of the most cost-effective hybrid state estimation scheme. The subfilters of IMM can be considered as fusing its initial value with new measurements. This approach is also shown in this paper. Perception net based error monitoring and recovery technique, which is a kind of geometric data fusion, makes it possible to monitor errors and to calibrate possible biases involved in sensed data and extracted features. Both detecting a maneuvering target and compensating the estimated state can be achieved by employing the properly implemented error monitoring and recovery technique. The IMM filter which employing the error monitoring and recovery technique shows good tracking performance for a highly maneuvering target as well as it reduces maximum values of estimation errors when maneuvering starts and finishes. The effectiveness of the pro-posed method is validated through simulation by comparing it with the conventional IMM algorithm.

• 대한정형도수물리치료학회지
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• 제17권2호
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• pp.1-9
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• 2011

Background: Injury or pain in the neck can affect proprioception. People who have a reduced proprioception are easily exposed to induce injury or pain. The aim of this study was to examine the reduced proprioception among people who had lateral flexion postural habit of neck in a sitting position. Methods: Twenty subjects with lateral flexion postural habit were compared with a matched control group. Relocation errors in 30 degree rotation to the right were measured three times with and without visual information randomly. Results: Relocation errors were higher in the lateral flexion postural group than the control group with (p<.01) and without (p<.005) the visual information. Visual information didn't affect the cervical relocation errors in the abnormal and control groups. Repetition is increased the relocation errors with (p<.01) and without (p<.001) visual information. Conclusions: The results support the hypothesis that subjects with lateral flexion postural habit have incorrect perception of their head position. It is necessary to realize the possibility of injury or pain found among people with lateral flexion postural habit.

• Journal of Sport and Applied Science
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• 제7권2호
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• pp.39-51
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• 2023

Purpose: The purpose of this study was to investigate differences in the control process to satisfy spatial and temporal constraints imposed upon the anticipation timing response by analyzing the effect of spatio-temporal accuracy demands on eye movements, response accuracy, and the coupling of eye and hand movements. Research design, data, and methodology: 12 right-handed male subjects participated in the experiment and performed anticipation timing responses toward a stimulus moving at three velocities (0.53m/s, 0.66m/s, 0.88m/s) in two task constraint conditions (temporal constraint, spatial constraint). During the response, response accuracy and eye movement patterns were measured from which timing and radial errors, the latency of saccade, fixation duration of the point of gaze (POG), distance between the POG and stimulus, and spatio-temporal coupling of the POG and hand were calculated. Results: The timing and radial errors increased with increasing stimulus velocity, and the spatio-temporal constraints led to larger timing errors than the temporal constraints. The latency of saccade and the temporal coupling of eye and hand decreased with increasing stimulus velocity and were shorter and longer respectively in the spatio-temporal constraint condition than in the temporal constraint condition. The fixation duration of the POG also decreased with increasing stimulus velocity, but no difference was shown between task constraint conditions. The distance between the POG and stimulus increased with increasing stimulus velocity and was longer in the temporal constraint condition compared to the spatio-temporal constraint condition. The spatial coupling of eye and hand was larger with the velocity 0.88m/s than those in other velocity conditions. Conclusions: These results suggest that differences in eye movement patterns and spatio-temporal couplings of stimulus, eye and hand by task constraints are closely related with the accuracy of anticipation timing responses, and the spatial constraints imposed may decrease the temporal accuracy of response by increasing the complexity of perception-action coupling.

• 한국병원경영학회지
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• 제18권3호
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• pp.27-42
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• 2013

Purpose: This study is aimed to provide the fundamental data for building the patient safety culture by identifying the perceptions of patient safety culture of hospital nurses. Methods: this study was a cross-sectional survey. For this study, 816 nurses participated from three general hospital and one university hospital located in Gwangju and Chonnam. The data were collected from April to June, 2012 by self-administrated questionnaires. The 'Hospital Survey on Patient Safety Culture'developed AHRQ(2004) and translated in Korean and edited by Je(2006), was used to measure the patient safety culture which the nurses were perceived. The collected data were analyzed with descriptive statistics, t-test, ANOVA, Scheffe test using SPSS window 18.0. Results: With a possible score of 5 points, the average score for nurses'perceived patient safety culture 3.32. In the sub dimension of patient safety culture, the score hospital-level aspects was the highest level of 3.27(0.50) and reporting system medical errors was the lowest of 3.08(0.40). The difference of perception level on patient safety culture were statistically significant depending on demographic and job-related characteristics such as age, hospital level, work experience in present hospital, work experience in present unit, work experience in present area, positions, work hours of week. Conclusion: The scores of perception of which were shown to be relatively low in this study, needed to be improved through continuous education, evaluation and researches. We suggest developing a new tool on patient safety culture fit our country which will help to manage ongoing patient safety culture.

• 간호행정학회지
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• 제17권4호
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• pp.462-473
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• 2011

Purpose: This study was done to identify the factors affecting the perception of patient-safety-culture and the level of safety-care-activity among nurses in small-medium sized general hospitals. Method: Data were collected during April and May 2011, from 241 nurses of five hospitals. A hospital survey questionnaire on patient-safety-culture and safety-care-activity was used. Collected data were analyzed using descriptive statistics, Pearson correlation, t-test, ANOVA, Scheffe test and multiple-regression. Results: There were significant differences in the level of perception of patient-safety-culture according to the nurses' age, type of hospital, position, work department, and knowing whether there was a Patient-Safety committee in their hospitals. Nurses with higher perceived level of the patient-safety-culture performed more safety-care-activities. Factors influencing on the safety-care-activities were general patient safety, having had safety-education, patient-to-nurse ratio, employment status, and the level of reporting medical errors. These factors explained 22.9% of the safety-care-activity. Conclusions: The study findings suggest that in order to improve the nurses' perceived level of patient-safety-culture and safety-care-activity, the hospitals need to establish patient-safety committees and communication systems, and openness to reporting medical errors are needed. Better work conditions to ensure appropriate work time, regulate patient-to-nurse ratio, and nursing education standards and criteria, are also required.