• Title/Summary/Keyword: 통계 처리

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Evaluation of Distortion in Measuring the Stability of Distal Radio-ulnar Joint in Wrist PA-Grip View (Wrist PA-grip view에서 먼쪽노자관절의 안정성 정도 측정 시 왜곡도 평가)

  • Shim, Jina;Lee, Youngjin
    • Journal of the Korean Society of Radiology
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    • v.15 no.3
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    • pp.321-327
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    • 2021
  • Wrist PA-grip view is used to diagnose triangular fibrocartilage complex (TFCC) tear because it can easily diagnose damage to the surrounding wrist ligaments. However, despite advances in radiology equipment, distortion of images due to geometric elements still has many limitations. In this paper, we propose a method that can minimize the distortions of images by analyzing the distortions occurring in the wrist PA-grip view. A source of image distance (SID) were set at 130 cm and 150 cm for comparison with 110 cm. Depending on the SID, the phantom of wrist was moved at 0, 2, 4, 6, 8, and 10 cm in the X-axis and Y-axis directions, respectively. For quantitative evaluation, the difference of distance between the radius and ulna was measured in picture archiving and communication system (PACS) system. As a qualitative evaluation, survey was conducted among 20 radiologic technologists who examined the Wrist PA-grip view. The Kruskal Wallis test was performed to compare the distortion according to the phantom movement in the X-axis and Y-axis directions based on the SID, and the Tukey test was performed as a post-test. In the quantitative evaluation results, the measured values obtained in the X-axis was not significantly different in all groups (p>0.05). The measured values obtained in the Y-axis was significantly different in the most groups (p<0.05). Therefore, to reduce distortion while maintaining image quality, we recommend what examine the SID at 150 cm than 110 cm.

Determination of fluorine in Krill oils by combustion-ion chromatography (연소-이온크로마토그래프를 이용한 크릴오일 중 불소 시험법)

  • Jung, Jaehak;Kim, Soobin;Chu, Euisung;Joung, Joungmoo
    • Analytical Science and Technology
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    • v.33 no.6
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    • pp.262-273
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    • 2020
  • A fluorine content analysis method for krill oils, which is a representative oil formulation in foods, was developed in compliance with the Korea Food and Drug Ministry's "Guidelines for Validation of Testing Methods Related to Food". Using this method for krill oils, the presence of impurities was evaluated via combustion-ion chromatography (C-IC). A review of published technical data on fluorine in krill oils showed that while the traditional wet potentiometric method was typically used, it was not reliable. Moreover, there was no food testing/analysis laboratory in Korea to perform a fluorine test analysis on such an oil matrix. Therefore, we identified halogen (fluorine) tests, developed to national and international standards, and developed a test method suitable for krill oils by selecting a C-IC method that is sufficiently applicable to the oil matrix. Based on the characteristics of the oil matrix, the optimal test method was established through various experiments by reviewing the concerns related to loss and interference in the preparation and introduction of samples. The fluorine content test was carried out on 11 krill oil products that were purchased online. Most products (with the exception of only one) were found to contain less than the reporting limit obtained by the test method. Furthermore, after additional testing, a high fluorine content of approximately 2,000 ~ 3,000 mg/kg was detected on the krill surface, although the concentration varied depending on the area of the krill. A comparison with samples from two ISO/IEC 17025 testing laboratories confirmed that there was no significant difference in the statistical analysis results obtained by ANOVA among the three laboratories. A testing guide for fluorine content analysis was completed.

Exploring the Thalamus of the Human Brain using Tractography Analysis at 3Tesla MRI (3 Tesla MRI에서 트랙토그래피 분석을 이용한 시상 탐색)

  • Im, Sang-Jin;Kim, Joo-Yeon;Baek, Hyeon-Man
    • Journal of the Korean Society of Radiology
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    • v.15 no.4
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    • pp.555-564
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    • 2021
  • Thalamus is known to play an important role in the regulation of nerve function. Thalamus, located in the center of the brain, is involved in sleep, arousal, and emotional regulation, and has been reported to be associated with multiple sclerosis, essential tremors, and neurodegenerative diseases such as Parkinson's disease. In addition, it has been reported that iron deposits in the thalamus can cause depressive symptoms with age. Although there are discrepancies between studies, it can be deduced that the thalamus region has a clear effect on neurological disorders due to a strong relationship between the thalamus and neurological functions such as emotional control and processing. Through tractography analysis, the connectivity between the detailed areas of each subcortical region was investigated in the form of a matrix, showing strong connectivity and weak interhemispheric connectivity. In the 59> group, the WM connectivity of thalamus was found to be weaker than those of the two groups. Comparisons between the two groups showed that the young groups (10-39 and 40-59) had higher connection intensity than the 59> group and that statistically significant differences in 3 connection pathways were found in each hemisphere. A decrease in thalamus-related connection strength in aging has shown that it can affect emotional and neurological disorders such as anxiety and depression, and network measurements can help assess cognitive impairment across clinical conditions.

The Effect of Fundamental nursing practice class with Flipped Learning on Self-efficacy and Critical Thinking Disposition of Nursing students (플립러닝을 적용한 기본간호학실습 수업이 간호대학생의 자기효능감과 비판적 사고능력에 미치는 효과)

  • Kim, Hye-Suk
    • The Journal of the Convergence on Culture Technology
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    • v.7 no.3
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    • pp.277-284
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    • 2021
  • This study was conducted to confirm the effect on self-efficacy and critical thinking disposition by applying flip learning class to fundamental nursing practice education for nursing students. The study subjects were 42 people in the experimental group and 40 people in the control group who were allowed to participate in the study. Data analysis was statistically processed using SPSS/WIN 24.0 program. As a result of this study, the self-efficacy score of the experimental group who received the flipped learning class increased significantly immediately after class (t=3.49, p=.001) compared to before class, and 10 weeks after class (t=-0.75, p=.456), the effect persisted. The critical thinking disposition score of the experimental group increased significantly immediately after class (t=3.49, p=.001) compared to before class, and the effect persisted 10 weeks after class (t=0.11, p=.913). However, there was no significant difference in the academic self-efficacy and critical thinking disposition scores of the control group who received lecture classes. In other words, it was confirmed from the results of this study that fundamental nursing practice classes applied with flip learning are effective in improving self-efficacy and critical thinking disposition of nursing students. Based on this study, it is suggested that the application of flip learning method should be expanded in the major subject of nursing science.

Scale Revalidation Study for Online Use of the Learning Strategy Diagnostic Scale for Junior College (전문대학생용 학습전략 진단 척도의 온라인 활용을 위한 재타당화 연구)

  • Hwang, Jae Gyu
    • The Journal of the Convergence on Culture Technology
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    • v.8 no.1
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    • pp.349-359
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    • 2022
  • The purpose of this study is to add and revalidate items of learning cognition and learning emotion factors for online use of the K-LSS for junior college. It is important for self-reflection and improvement of academic achievement to specifically explore and analyze the sub-factors of learning cognition, learning behavior, and learning emotion for each item that can affect the learning strategy of junior college students. The added items are two items for diagnosing the concentration of attention in the learning information processing process of the learning cognitive factor and two questions about the interpersonal anxiety factor for diagnosing the level of anxiety about others in the learning emotional factor. The study area was conducted in 5 areas nationwide, and the subjects of the study were 923 junior college students excluding 327 respondents who answered insincerity. The K-LSS_r scale is a learning strategy diagnosis scale of 52 questions composed of three sub-elements of learning cognition (18 questions), learning emotion (15 questions), and learning behavior (19 questions), and reliability for generalization in this study. As a result of the verification, Cronbach's α coefficient of the entire scale was .896, and Cronbach's α coefficient of the three factors ranged from .876 to .910. The half-segment reliability coefficient of the scale was .858 in total, and the half-segment reliability coefficients of the three factors ranged from .792 to .843. The test-retest reliability verification result for 3 weeks for 350 Junior college Students in 5 regions was .884, and the validity test for generalization also confirmed that the recruitment validity is significant.

Korean Part-Of-Speech Tagging by using Head-Tail Tokenization (Head-Tail 토큰화 기법을 이용한 한국어 품사 태깅)

  • Suh, Hyun-Jae;Kim, Jung-Min;Kang, Seung-Shik
    • Smart Media Journal
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    • v.11 no.5
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    • pp.17-25
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    • 2022
  • Korean part-of-speech taggers decompose a compound morpheme into unit morphemes and attach part-of-speech tags. So, here is a disadvantage that part-of-speech for morphemes are over-classified in detail and complex word types are generated depending on the purpose of the taggers. When using the part-of-speech tagger for keyword extraction in deep learning based language processing, it is not required to decompose compound particles and verb-endings. In this study, the part-of-speech tagging problem is simplified by using a Head-Tail tokenization technique that divides only two types of tokens, a lexical morpheme part and a grammatical morpheme part that the problem of excessively decomposed morpheme was solved. Part-of-speech tagging was attempted with a statistical technique and a deep learning model on the Head-Tail tokenized corpus, and the accuracy of each model was evaluated. Part-of-speech tagging was implemented by TnT tagger, a statistical-based part-of-speech tagger, and Bi-LSTM tagger, a deep learning-based part-of-speech tagger. TnT tagger and Bi-LSTM tagger were trained on the Head-Tail tokenized corpus to measure the part-of-speech tagging accuracy. As a result, it showed that the Bi-LSTM tagger performs part-of-speech tagging with a high accuracy of 99.52% compared to 97.00% for the TnT tagger.

Growth and Fruit Characteristics and Working Time of 'Duke' Highbush Blueberry by Shrub Distance (주간 거리에 따른 하이부쉬블루베리 'Duke' 품종의 수체 생육, 과실 특성, 작업 시간)

  • Kim, Su-Jin;Lee, Dong-Hoon;Hur, Youn-Young;Im, Dong-Jun;Park, Seo-Jun
    • Korean Journal of Organic Agriculture
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    • v.29 no.1
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    • pp.75-84
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    • 2021
  • Shrub growth and fruit characteristics and working time of 'Duke' blueberry by shrub distance were investigated. Overapping rate of blueberry crown was 109% in 0.6 m shrub distance, 37% in 1.2 m shrub distance, and -88% in 2.4 m shrub distance, respectively. The number of main stem tended to increase as the shrub spacing widened. The other fruit characteristics, except for the fruit weight, did not show any significantly different according to the shrub distance. The yield per 10 a was 2,097 kg for 0.6 m shrub distance, 1,303 kg for 1.2 m shrub distance, and 710.7 kg for 2.4 m shrub distance in 2019, respectively. Total working time was 154 hr for 0.6 m shrub distance, 114 hr for 1.2 m shrub distance, and 74 hr for 2.4 m shrub distance. Therefore, the blueberry shrub distance was judged to be appropriate about 1.2 m in the long-termly. However, in order to increase yield early and income, the shrub can maintain 0.6 m distance during young shrub, it can managed flexibly to 1.2 m distance when it becomes a mature shrub.

A Study on the Policy Direction for the Introduction and Activation of Smart Factories by Korean SMEs (우리나라 중소기업의 스마트 팩토리 수용 및 활성화 제고를 위한 정책 방향에 대한 연구)

  • Lee, Yong-Gyu;Park, Chan-Kwon
    • Korean small business review
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    • v.42 no.4
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    • pp.251-283
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    • 2020
  • The purpose of this study is to provide assistance to the establishment of related policies to improve the level of acceptance and use of smart factories for SMEs in Korea. To this end, the Unified Technology Acceptance Model (UTAUT) was extended to select additional factors that could affect the intention to accept technology, and to demonstrate this. To achieve the research objective, a questionnaire composed of 7-point Likert scales was prepared, and a survey was conducted for manufacturing-related companies. A total of 136 questionnaires were used for statistical processing. As a result of the hypothesis test, performance expectation and social influence had a positive (+) positive effect on voluntary use, but effort expectation and promotion conditions did not have a significant effect. As an extension factor, the network effect and organizational characteristics had a positive (+) effect, and the innovation resistance had a negative effect (-), but the perceived risk had no significant effect. When the size of the company is large, the perceived risk and innovation resistance are low, and the level of influencing factors for veterinary intentions, veterinary intentions, and veterinary behaviors are excluded. Through this study, factors that could have a positive and negative effect on the adoption (reduction) of smart factory-related technologies were identified and factors to be improved and factors to be reduced were suggested. As a result, this study suggests that smart factory-related technologies should be accepted.

An Analysis of the Relationship between Self-Esteem and Leisure Satisfaction and Quality of Life in the Elderly Women's Participation of a Ballet Program (고령여성의 발레운동 참여에 따른 자아존중감과 여가만족 및 삶의 질의 관계 분석)

  • Park, Seon-Hee
    • Journal of Korea Entertainment Industry Association
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    • v.14 no.6
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    • pp.161-170
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    • 2020
  • The purpose of this study is to examine satisfaction at using leisure time and quality of life in the elderly women's participation of a ballet program. A questionnaire survey was conducted with 148 elderly women registering for 10 dance academies in G Metropolitan City in relation to self-esteem, leisure satisfaction, and quality of life. After data processing, the following conclusions were drawn. The results of correlation and regression analysis between self-esteem and leisure satisfaction and quality of life were as follows. Positive self-esteem had positive effects on all sub-factors of leisure satisfaction and quality of life. Negative self-esteem had negative effects on social satisfaction of leisure satisfaction and health and psychological factors of quality of life. The results of research model fit and hypothesis testing between self-esteem and leisure satisfaction and quality of life were as follows. Self-esteem had positive effects on leisure satisfaction and quality of life and high leisure satisfaction had significant effects on quality of life factors. In conclusion, the elderly women's participation in the ballet program improved their self-esteem and significantly positive effects on their leisure satisfaction and quality of life. It is, therefore, suggested that the elderly's ballet exercise through constant physical activity will prevent diseases and promote health in their old age.

The Effect of Presence for Virtual Reality Sports Use Activation on Participation Satisfaction (가상현실 스포츠 이용 활성화를 위한 프레즌스이 참여만족에 미치는 영향)

  • Lee, Seung-Do;Lim, Kwan-Sun
    • Journal of Korea Entertainment Industry Association
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    • v.14 no.7
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    • pp.79-94
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    • 2020
  • The purpose of this study is to analyze the difference in the effect of presence for the activation of virtual reality sports on participation satisfaction, to suggest continuous screen golf exercise participation, and to provide empirical and academic data for the development of the entire virtual reality sports market. To achieve this purpose, the survey period was from March 13 to May 13, 2020, with five researchers and assistants. The purpose of this study and the questionnaire were fully explained to consumers who experienced screen golf directly, and 247 questionnaires were used as the final valid sample by making a questionnaire with self-administration method. The data processing method was the statistical program Windows SPSS 18.0. First, factor analysis and reliability analysis, second, frequency analysis mean(M) and standard deviation(SD), third, Scheffe analysis among t-test and One-way ANOVA analysis, fourth, correlation analysis between variables and multiple regression analysis were conducted. The results of this study through these methods and procedures are as follows. First, there was a significant difference in participation satisfaction of presence in gender, and participation period of general characteristics. Second, there was a high difference in social presence, social self-reliance, and Ego, which are sub-factors of Presence, in social satisfaction, psychological satisfaction, and physical satisfaction. Third, the sub-factors of Presence, Social Presence, Social Self-Reliance, and Ego, were found to have a high effect on the sub-factors of Participation Satisfaction, Social Satisfaction, and Psychological Satisfaction.