• 제목/요약/키워드: Confidence Evaluation

검색결과 795건 처리시간 0.029초

Analyzing the Type of Recognition for College Students' Department Jumpers

  • Cha, Su-Joung
    • 한국컴퓨터정보학회논문지
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    • 제25권7호
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    • pp.125-134
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    • 2020
  • 본 연구에서는 Q방법론을 적용하여 대학생을 대상으로 학과 점퍼에 대한 주관적 평가와 인식 유형별 특성을 알아보고자 하였다. 대학생의 학과 점퍼에 대한 태도 및 인식유형은 3유형으로 분류되었다. 제1유형의 경우 학과 점퍼는 학과에 대한 소속감을 주고 학과를 홍보하는 역할을 한다고 인식하였다. 또, 학과 점퍼 착용 시 행동을 조심하지만, 활동이 편하고 주변 사람들의 좋은 평가를 하여 나의 신뢰감을 높여주는 효과가 있다고 생각하였다. 제2유형의 경우 학과 점퍼는 활동하기 편하며 유행을 따르지 않는 무난한 디자인이라 만족스럽고, 등교 시 늘 착용하였다. 제3유형은 학과 점퍼 착용 시 동질감과 소속감을 주고, 학과 점퍼가 유행을 따라가는 스타일이면 좋겠고 학과 점퍼 착용에 긍정적인 유형이다. 대학생들의 학과 점퍼는 유니폼으로 학과의 이미지나 상징성을 잘 나타내고, 활동량이 큰 대학생들의 신체적 특징을 반영하여 맞음새가 우수한 학과 점퍼가 개발되어야 할 것으로 생각된다.

Applying a Forced Censoring Technique with Accelerated Modeling for Improving Estimation of Extremely Small Percentiles of Strengths

  • Chen Weiwei;Leon Ramon V.;Young Timothy M.;Guess Frank M.
    • International Journal of Reliability and Applications
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    • 제7권1호
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    • pp.27-39
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    • 2006
  • Many real world cases in material failure analysis do not follow perfectly the normal distribution. Forcing of the normality assumption may lead to inaccurate predictions and poor product quality. We examine the failure process of the internal bond (IB or tensile strength) of medium density fiberboard (MDF). We propose a forced censoring technique that closer fits the lower tails of strength distributions and better estimates extremely smaller percentiles, which may be valuable to continuous quality improvement initiatives. Further analyses are performed to build an accelerated common-shaped Weibull model for different product types using the $JMP^{(R)}$ Survival and Reliability platform. In this paper, a forced censoring technique is implemented for the first time as a software module, using $JMP^{(R)}$ Scripting Language (JSL) to expedite data processing, which is crucial for real-time manufacturing settings. Also, we use JSL to automate the task of fitting an accelerated Weibull model and testing model homogeneity in the shape parameter. Finally, a package script is written to readily provide field engineers customized reporting for model visualization, parameter estimation, and percentile forecasting. Our approach may be more accurate for product conformance evaluation, plus help reduce the cost of destructive testing and data management due to reduced frequency of testing. It may also be valuable for preventing field failure and improved product safety even when destructive testing is not reduced by yielding higher precision intervals at the same confidence level.

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매설조건에 따른 연성관의 변형특성 (Deformation Characteristics of Flexible Pipe with Variation of Buried Conditions)

  • 이봉직
    • 한국지반환경공학회 논문집
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    • 제15권10호
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    • pp.53-62
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    • 2014
  • 국내의 경우 하수관으로 많이 사용되어 온 관종은 콘크리트 흄관으로 대표되는 강성관이 주를 이루고 있으나, 시간 경과에 따른 관 부식 및 수밀성 부족 등의 이유로 사용이 급격히 감소하고 있다. 반면에 연성관은 부식에 강할 뿐만 아니라 자재의 무게가 경량이어서 시공성이 우수한 장점이 있어 사용이 증가하고 있는 실정이다. 그러나 연성관에 대한 시장의 신뢰성 부족과 미흡한 다짐관리로 인한 국부적인 파손사례가 발생하고 있어 이에 대한 원인분석 및 관리방안이 필요한 실정이다. 이에 본 연구에서는 시공순서, 관의 강성, 관 하부 콘크리트 기초의 강도, 관 하부 모래기초의 다짐도, 관 주변 모래의 다짐도 및 관 상단 되메움재의 다짐도 등을 변화시켜 가며 각각의 조건에 따른 관의 변형특성을 수치해석을 통하여 평가하였다. 평가결과 각 인자에 대한 영향을 확인할 수 있었으며 특히 연성관의 경우 관 주변 모래의 품질관리가 중요한 것으로 나타났다.

흥미도 측도 관점에서 상대적 인과 강도의 고찰 (A study on the relatively causal strength measures in a viewpoint of interestingness measure)

  • 박희창
    • Journal of the Korean Data and Information Science Society
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    • 제28권1호
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    • pp.49-56
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    • 2017
  • 빅 데이터를 분석하기 위한 기법 중에서 연관성 규칙은 여러 가지 연관성 평가 기준을 이용하여 항목들 간에 연관성 유무를 탐색하는 기법이다. 이러한 연관성 규칙 기법은 규칙의 생성 방향에 따라 정과 부, 그리고 역의 연관성 규칙 등이 있다. 본 논문에서는 여러 가지 상대적 인과 강도를 흥미도 측도의 관점에서 어떤 유형의 연관성 규칙에 적용 가능한 지를 탐색하는 동시에 기존의 기본적인 평가측도 증에서 여러 가지 유형의 신뢰도들과의 관계를 규명하고자 하였다. 그 결과, 후항변수가 발생할 비율이 0.5 이상이면 Good이 제안한 측도 ($RCS_{IJ1}$)가 Lewis가 제안한 측도 ($RCS_{LR1}$) 보다 값의 변화폭이 더 크므로 $RCS_{IJ1}$이 더 바람직한 측도가 되며, 그 비율이 0.5 미만이면 $RCS_{LR1}$이 더 바람직하다고 할 수 있다.

학습동기모델과 특수목적영어 융합 모듈 프로그램 평가연구: 간호학과 신입생을 대상으로 (An Evaluation Study of an ESP Module Program Combining with Keller's Learning Motivation Model for the 1st grade Nursing Students)

  • 안선욱
    • 한국융합학회논문지
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    • 제9권5호
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    • pp.257-267
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    • 2018
  • 본 연구는 간호학과 신입생들의 학과목 적응과 외국어 능력 향상에 대한 부담을 덜어주기 위해 고안된 Keller의 학습동기 모델과 특수목적영어를 융합한 모듈 프로그램에 대한 평가 연구이다. 특수목적영어 융합 모듈 프로그램을 적용한 험군과, 전통적 강의방식을 적용한 대조군의 학습동기와 학업성취도를 비동등성 대조군 사후 실험설계를 통해 비교하고, 듈 프로그램에 대한 학생들의 인식과 주관적인 효과를 질적 자료를 통해 파악하였다. 연구 결과, 학습동기의 총합은 실험군과 대조군의 차이가 유의하였지만(t= 2.391, p=.019), 학업성취도에서는 두 그룹 간의 차이가 유의하지 않았다(t=0.116, =.098). 융합 모듈프로그램에 대한 주관적 효과들로는 '흥미로움', '학습에 효과적임', '임상의 이해를 도움', '자신감과 만족감을 경험함' 등 4가지로 범주화 되었다. 본 연구를 통해 Keller의 학습동기 모델과 특수목적영어를 융합한 모듈 프로그램은 호학과 영어에 대한 부담을 가진 신입생들에게 흥미를 주고, 학습과 임상의 이해를 도울 뿐 아니라, 자신감과 만족감을 험하게 하는 등, 학습동기를 높이는데 긍정적으로 평가되었다.

비행안전 프로그램으로서의 생체 활성도 활용방안 연구 (A Study on the Practical Use of Human Alertness for Flight Safety Program)

  • 이달호;최승호
    • 대한인간공학회지
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    • 제17권3호
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    • pp.13-22
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    • 1998
  • Aircraft and the three-dimensional environment in which they operate are not user-friendly for human beings. As a result, maintaining the proficiencies necessary to safely and efficiently fly an airplane are difficult, and costly. The physiological and emotional status of the human element remains crucial in maintaining safe performance by all crew members. In the study of Hagiwara et al.(1993). they called the physiological and emotional status of the human element into the human alertness or physiological activity and stress, fatigue, circadian rhythm, alcohol. smoking, and self-medication are known the major factors that deteriorate the human alertness. Accordingly. this paper deals with the quantitative and objective performance test based on tracking error and reaction time by means of the new computer test program into which the perception-motion system of human beings is applied. Throughout this experiment using performance test, the results suggest that performance capability in state of sleep deprivation 2 hours and alcoholic 0.05~0.06% in blood were more impaired than one in a normal state, and they further showed statistically significant differences between them, which were influenced by impairment factors of body regulation and pilot's grade. We also obtained the prediction value and the 95% confidence interval of tracking error and reaction time at the normal state for the purpose of distinguishing performance capability between the normal state and the abnormal state. And it is expected that the evaluation of human alertness using performance test will be applied to the quantitative assessment of an each pilot's realistic consciousness/attention, and will lead a flight commander to the accurate decision of mission approval prior to a flight.

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한국 성인남녀에서 스트레스와 세로토닌 전달체(5-HTTLPR) 유전자 변이가 인터넷 게임장애(IGD)에 미치는 영향 (Effect of Stress and Serotonin-Transporter-Linked Polymorphic Region Variants on Internet Gaming Disorder in Korean Adults)

  • 홍형숙;정조은;조현;곽수민;최미란;최정석;최삼욱;김대진
    • 생물정신의학
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    • 제25권3호
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    • pp.79-87
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    • 2018
  • Objectives Internet gaming disorder (IGD) is known to be related to stress and the serotonin-transporter-linked polymorphic region (5-HTTLPR) that is known to be associated with stress and has been studied to affect various psychiatric illness outbreaks. We tried to examine the relationship between stress, 5-HTTLPR and IGD. Methods A total of 59 participants with IGD, diagnosed according to the 5th edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) criteria and 67 normal controls (NC) were enrolled. The IGD group and the NC were compared using chisquare test and independent sample t-test, and logistic regression analysis was used to examine the relationship between stress, the 5-HTTLPR, and IGD. Results The mean scores for anxiety, impulsivity and stress were significantly higher in the IGD group than in the NC. In addition, there was a significant association between stress and IGD [odds ratio (OR) = 1.172, 95% confidence interval (CI) = 1.008-1.362]. Conclusions This study showed that stress would affect IGD. Therefore, the evaluation and management of stress should be included in the diagnosis and treatment of IGD.

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Evaluation of Common Risk Factors for Breast Carcinoma in Females: a Hospital Based Study in Karachi, Pakistan

  • Sufian, Saira Naz;Masroor, Imrana;Mirza, Waseem;Butt, Sehrish;Afzal, Shaista;Sajjad, Zafar
    • Asian Pacific Journal of Cancer Prevention
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    • 제16권15호
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    • pp.6347-6352
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    • 2015
  • Background: Breast malignancies are one of the leading causes of deaths in females worldwide. There are a number of risk factors associated with breast cancer but in Karachi Pakistan there are insufficient data available. Materials and Methods: A case control study was conducted on females in age group between 30-80 years. This study was accomplished by retrospective data collection in Aga Khan University Hospital Karachi, Pakistan. A total of 108 females with primary malignancy of breast were included along with 108 matched controls. Relationship of various factors with disease was studied using logistic regression to calculate odds ratios with 95 % confidence intervals. Results: A total of 14 variables were analyzed and based on and 7 were found to be risk factors: old age, family history of breast cancer, family history of other carcinomas, personal history of breast carcinoma, early age of menarche, older age of mother at first delivery and lower number of children. Five factors, parity, breast feeding, history of oral contraceptive pills intake, past history of oophorectomy and hysterectomy showed protective associations. One variable, use of hormonal replacement therapy, showed a controversial link and one other, marital status, was not significant in this study. Conclusions: It is concluded that most of the well-known risk factors for breast cancer are also associated with the disease in the female population of Karachi, Pakistan. High risk patients should be the focus with the help of this study so that screening can be more effective for early diagnosis before clinically evident breast malignancy.

Areca Nut Chewing and the Risk of Re-hospitalization and Mortality Among Patients With Acute Coronary Syndrome in Pakistan

  • Karim, Muhammad Tariq;Inam, Sumera;Ashraf, Tariq;Shah, Nadia;Adil, Syed Omair;Shafique, Kashif
    • Journal of Preventive Medicine and Public Health
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    • 제51권2호
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    • pp.71-82
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    • 2018
  • Objectives: Areca nut is widely consumed in many parts of the world, especially in South and Southeast Asia, where cardiovascular disease (CVD) is also a huge burden. Among the forms of CVD, acute coronary syndrome (ACS) is a major cause of mortality and morbidity. Research has shown areca nut chewing to be associated with diabetes, hypertension, oropharyngeal and esophageal cancers, and CVD, but little is known about mortality and re-hospitalization secondary to ACS among areca nut users and non-users. Methods: A prospective cohort was studied to quantify the effect of areca nut chewing on patients with newly diagnosed ACS by categorizing the study population into exposed and non-exposed groups according to baseline chewing status. Cox proportional hazards models were used to examine the associations of areca nut chewing with the risk of re-hospitalization and 30-day mortality secondary to ACS. Results: Of the 384 ACS patients, 49.5% (n=190) were areca users. During 1-month of follow-up, 20.3% (n=78) deaths and 25.1% (n=96) re-hospitalizations occurred. A higher risk of re-hospitalization was found (adjusted hazard ratio [aHR], 2.05; 95% confidence interval [CI], 1.29 to 3.27; p=0.002) in areca users than in non-users. Moreover, patients with severe disease were at a significantly higher risk of 30-day mortality (aHR, 2.77; 95% CI, 1.67 to 4.59; p<0.001) and re-hospitalization (aHR, 2.72; 95% CI, 1.73 to 4.26; p<0.001). Conclusions: The 30-day re-hospitalization rate among ACS patients was found to be significantly higher in areca users and individuals with severe disease. These findings suggest that screening for a history of areca nut chewing may help to identify patients at a high risk for re-hospitalization due to secondary events.

다짐밀도 측정장비(Non-nuclear Type)를 사용한 현장 다짐밀도 평가 (Evaluation of Field Compaction Density by Non-nuclear Density Gauge)

  • 김영민;임정혁;양성린;김기현;황성도;정규동
    • 한국도로학회논문집
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    • 제17권1호
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    • pp.51-58
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    • 2015
  • PURPOSES : The objective of this study is to compare the densities of asphalt pavements measured both in the field and in the laboratory, and also to evaluate the applicability of field density measuring equipment, such as the pavement quality indicator (PQI), by using statistical analysis. METHODS : For the statistical analysis of the density measured from asphalt pavement, student t-tests and a coefficient of correlation are investigated. In order to compare the measured densities, two test sections are prepared, with a base layer and an intermediate layer constructed. Each test section consists of 9 smaller sections. During construction, the field densities are measured for both layers (base and intermediate) in each section. Core samples are extracted from similar regions in each section, and moved to the laboratory for density measurements. All the measured densities from both the field and laboratory observations are analyzed using the selected statistical analysis methods. RESULTS AND CONCLUSION : Based on an analysis of measured densities, analysis using a correlation coefficient is found to be more accurate than analysis using a student t-test. The correlation coefficient (R) between the field density and the core density is found to be very low with a confidence interval less than 0.5. This may be the result of inappropriate calibration of the measuring equipment. Additionally, the correlation coefficient for the base layer is higher than for the intermediate layer. Finally, we observe that prior to using the density measuring equipment in the field, a calibration process should be performed to ensure the reliability of measured field densities.