• Title/Summary/Keyword: perception errors

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Development of Management Guidelines and Procedure for Anthropometric Suitability Assessment: Control Room Design Factors in Nuclear Power Plants

  • Lee, Kyung-Sun;Lee, Yong-Hee
    • Journal of the Ergonomics Society of Korea
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    • v.34 no.1
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    • pp.29-43
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    • 2015
  • Objective: The aim of this study is to develop management guidelines and a procedure for an anthropometric suitability assessment of the main control room (MCR) in nuclear power plants (NPPs). Background: The condition of the MCR should be suitable for the work crews in NPPs. The suitability of the MCR depends closely on the anthropometric dimensions and ergonomic factors of the users. In particular, the MCR workspace design in NPPs is important due to the close relationship with operating crews and their work failures. Many documents and criteria have recommended that anthropometry dimensions and their studies are one of the foremost processes of the MCR design in NPPs. If these factors are not properly considered, users can feel burdened about their work and the human errors that might occur. Method: The procedure for the anthropometric suitability assessment consists of 5 phases: 1) selection of the anthropometric suitability evaluation dimensions, 2) establishment of a measurement method according to the evaluation dimensions, 3) establishment of criteria for suitability evaluation dimensions, 4) establishment of rating scale and improvement methods according to the evaluation dimensions, and 5) assessment of the final grade for evaluation dimensions. The management guidelines for an anthropometric suitability assessment were completed using 10 factors: 1) director, 2) subject, 3) evaluation period, 4) measurement method and criteria, 5) selection of equipment, 6) measurement and evaluation, 7) suitability evaluation, 8) data sharing, 9) data storage, and 10) management according to the suitability grade. Results: We propose a set of 17 anthropometric dimensions for the size, cognition/perception action/behavior, and their relationships with human errors regarding the MCR design variables through a case study. The 17 selected dimensions are height, sitting height, eye height from floor, eye height above seat, arm length, functional reach, extended functional reach, radius reach, visual field, peripheral perception, hyperopia/myopia/astigmatism, color blindness, auditory acuity, finger dexterity, hand function, body angle, and manual muscle test. We proposed criteria on these 17 anthropometric dimensions for a suitability evaluation and suggested an improvement method according to the evaluation dimensions. Conclusion: The results of this study can improve the human performance of the crew in an MCR. These management guidelines and a procedure for an anthropometric suitability assessment will be able to prevent human errors due to inadequate anthropometric dimensions. Application: The proposed set of anthropometric dimensions can be integrated into a managerial index for the anthropometric suitability of the operating crews for more careful countermeasures to human errors in NPPs.

Hands-on Tools to Prevent Human Errors in Highway Construction (고속도로 건설현장의 인적오류 예방을 위한 실무자용 도구 개발)

  • Kim, Jung-Yong;Yoon, Sang-Young;Cho, Young-Jin
    • Journal of the Ergonomics Society of Korea
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    • v.30 no.1
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    • pp.19-28
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    • 2011
  • Objective: The aim of this study is to reclassify human errors and to develop hands-on tools to apply the new classification for preventing human error accidents in highway construction site. Background: The main cause of accidents in highway construction was reported as the carelessness of workers. However, such diagnosis could not help us operationally prevent accidents in real workplace. Method: The accidents in highway construction were reanalyzed and the causes of human error were reclassified in order to educate and improve the awareness of human error in highway construction. Field survey and interview with safety managers and workers were conducted to find the causal relationship between the actual accidents and the human errors. Results: The most frequently observed human errors in highway construction were classified into six categories such as mis-perception, distraction, memory fail, slip, cognition error and mis-judgment. In order to provide hands-on tools to increase the awareness of human error in construction field, the human error checklist and card sorting diary were developed. Especially, the card sorting diary was designed to increase the ability in human error inspection of safety manager at construction site. Moreover, posters were developed based on actual accident cases. Conclusion: We suggested that the improved awareness and analytical report on checklist, card sorting diary and posters for construction field could collectively prevent the accident. Application: The classification of human error, hands-on tools and posters can be directly applicable on highway construction site. This analytical and collective approach preventing human error-related accident could be extended to other construction workplaces.

Analysis of the causes of high-risk intravenous medication errors recognized by hospital nurses (병원간호사가 인식한 고위험 정맥주사 투약오류 원인 분석)

  • Kim Mi Ran
    • The Journal of the Convergence on Culture Technology
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    • v.10 no.3
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    • pp.625-633
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    • 2024
  • This study was attempted to identify the perception and experience of hospital nurses on medication errors of high-risk intravenous drugs, and to identify the causes of medication errors and ways to improve them. The subjects of the study were nurses with work experience related to high-risk intravenous administration working at a university hospital located in D City, and data were collected between May 16 ~ 30, 2021. As a result of the study, six key factors were identified as the key factors in the safety of high-risk intravenous injections: the lack of a protocol for the administration of major drugs in each ward, the lack of training in the operation of the injection machine, the lack of standardized procedures for administering high-risk intravenous injections, the lack of individualized medication training for nurses, the lack or lack of the hospital's own drug list, and the lack of identification of drugs packaged in similar containers. At the nursing practice level, it is proposed to apply a high-risk intravenous medication safety program and conduct a future study to identify safety outcome indicators.

Perception and Production of English Geminate Graphemes by Korean Students (한국 학생들의 영어 겹자음 철자 인지와 발화)

  • Cho, Mi-Hui
    • Proceedings of the Korea Contents Association Conference
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    • 2009.05a
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    • pp.1092-1096
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    • 2009
  • While Korean allows the same consonants at the coda of the preceding syllable and at the onset of the following syllable, English does not allow the geminate consonant in the same position. Due to this difference between Korean and English, Korean learners of English tend to incorrectly produce geminate consonants for English geminate graphemes as in summer. Based on this observation, a pilot study was designed to investigate how Korean learners of English perceive and produce English doubleton graphemes and singleton graphemes. Twenty Korean college students were asked to perform a forced-choice perception test as well as a production test for the 36 real word stimuli which consist of near minimal pairs of singleton and doubleton graphemes. The result showed that the accuracy rates for the word with singleton graphemes were relatively high both in perception and production (78.6% and 76.1%, respectively), while those for the word with doubleton graphemes were low both in perception and production (55.3% and 61.7%, respectively). Also, spectrographic analyses were provided where more production errors were witnessed in doubleton grapheme words than singleton grapheme words.

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Training Effect on the Perception and Production of English Grapheme by Korean Learners of English (한국 학생들의 영어 철자 인지와 발화에 대한 훈련효과)

  • Cho, Mi-Hui
    • The Journal of the Korea Contents Association
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    • v.19 no.11
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    • pp.226-233
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    • 2019
  • Given that English grapheme is realized as five different American English vowels [ʌ, ju, ʊ, u, ə], the purpose of the current study is to examine Korean learners' perception and production of English grapheme and training effect on words with . Thus, the current study conducted pretest, training, and posttest for 31 Korean university students on 24 English words with . The overall results showed that the participants' perception and production accuracy was significantly improved in the posttest, thus indicating training effect on both perception and production. However, it was not the case that all five different vowels demonstrated training effect. In perception the accuracy rates of [ʌ], [ju], and [ə] were improved after training whereas those of [ʊ] and [u] were not. In production [ʌ], [ʊ], and [u] did not show training effect. These results indicate that the Korean participants had difficulty distinguishing between tense [u] and lax [ʊ] both in perception and production. In particular, the Korean participants tended to replace lax [ʊ] with tense [u] in production. This is because tense [u] is the best match to Korean [u] in acoustic measurements, so that tense [u] is easy for the Korean participants to pronounce than lax [ʊ]. Also, English [ʌ] tended to be mispronounced as [u]-quality vowels such as [u] and [ju], which is due to the spelling . The Korean participants also showed errors which insert [j] after alveolars [t, d, n, s], which runs against yod-dropping in American English. They also deleted [j] after labials and velars, which is due to the absence of orthography in the target words. Finally, pedagogical implications were discussed based on the findings of the current study.

The Process of Multicultural Perception Change in University students who Participated in Multicultural Mentoring (대학생의 다문화 멘토링 활동 경험을 통한 다문화 인식 변화)

  • Oh, Sekyung;Kim, Misoon
    • Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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    • v.6 no.9
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    • pp.201-210
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    • 2016
  • The purpose of this study is to explore the process of multicultural perception change of university students who have participated in multicultural mentoring. From May to December of the year 2015, the researcher conducted continuous e-mail interviews as well as in-depth interviews with mentors who participated in multicultural mentoring at I university. The interview contents were transcribed and comparative analysis was done. The result of the study is as follows. The process of multicultural perception change of mentors were discovered to be change in stereotypes, prejudice and ideas on multiculture, difference detection and social desire. They realized that stereotypes and prejudice were the errors of generalization due to their ideas on multiculture which were developed through media. Through mentoring activities the mentors reflected on the inherent negative ideas on multiculture, thus changing their ideas and thoughts. Also, the difference detection acknowledged cultural diversity along with the understanding of the cultural environment of mentees. Social desire expressed their wish for the change of perception in the cultures of others along with the positive change of multicultural perception through mentees. Thus, it was discovered that multicultural mentoring activities are sufficient prerequisites to change the social perception of multiculture from personal interest.

Formant Measurements of Complex Waves and Vowels Produced by Students (복합음과 대학생이 발음한 모음 포먼트 측정)

  • Yang, Byung-Gon
    • Speech Sciences
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    • v.15 no.3
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    • pp.39-51
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    • 2008
  • Formant measurements are one of the most important factors to objectively test cross-linguistic differences among vowels produced by speakers of any given languages. However, many speech analysis softwares present erroneous estimates and some researchers use them without any verification procedures. The purposes of this paper are to examine formant measurements of complex waves which were synthesized from the average formant values of five Korean vowels using three default methods in Praat and to verify the measured values of the five vowels produced by 20 students using one of the methods. Variances along the time axis are discussed after determining absolute difference sum from the 1/3 vowel duration point. Results show that there were smaller measurement errors by the burg method. Also, greater errors were observed in the sl or lpc methods mostly caused by the inappropriate formant settings. Formant measurement deviations were greater in those vowels produced by the female students than those of the male students, which were mostly attributed to the settings for the vowels /o, u/. Formant settings can best be corrected by changing the number of formants to the number of visible dark bands on the spectrogram. Those results suggest that researchers should check the validity of the estimates from the speech analysis software. Further studies are recommended on the perception test of the original sound with the synthesized sound by the estimated formant values.

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A Study on the Coincidences Between Group Traits and Personal Traits upon the Job Stress (개인 및 조직 성향의 적합도와 직무스트레스와의 상관성에 관한 연구)

  • Lee, Yong-Hee;Yun, Jong-Hun;Lee, Yong-Hee
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.35 no.2
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    • pp.21-29
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    • 2012
  • Person characteristics and the perception of organization climate affect on the performances associated with causes of job stress, and may induce various types of human errors. For incidence, a person's adaptation to organizational traits can influence on a person's performance with tasks assigned as well as job satisfaction, a change of occupation, etc. There are several evaluation methods such as an aptitude test to evaluate the suitability of department allocation. However, only person's traits such as an aptitude has been associated with department allocation and job assignment for the personnel management. This paper shows not only an evaluation result on the job-stress of the workers in nuclear power plants (NPPs), but also the relationships between the job-stress and the coincidences of group-personal, team-personal traits. Then, we systematically deduct a basic information on the factors to be considered to manage the organizational traits and job stress. We expect this result can contribute to enhance the organizational management against to the human errors as well as for the promotion of safety and efficiency of NPPs.

Audit Expectation Gap: Empirical Evidence from Vietnam

  • NGUYEN, Hieu Thanh;NGUYEN, Anh Huu
    • The Journal of Asian Finance, Economics and Business
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    • v.7 no.5
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    • pp.51-60
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    • 2020
  • The paper examines the characteristics and causes of the expectation gap of audit and assurance services. The paper has conducted three surveys with three target groups. In the first survey, participants are auditors, users of audit reports are subject in the second survey and in the third survey, and students major in auditing are selected. The content of the survey aims to find out the differences in perception of the survey participants on two issues: (i) responsibilities of auditors for detection frauds, errors, protection of the enterprise's assets and financial scandals, and (ii) the role of audit and auditors in making investment decisions and investor's belief. The research carried out survey from March to September 2019 with 165 responds. The collected data was processed by statistical software SPSS, version 23, and Mann-Whitney U test was used to analyze the results of the audit expectation gap between the auditor group and the users of audit report group and between the student group and users of audit report group. The results showed that there exists an expectation gap in the responsibility of auditors for detection of all frauds, errors and protection enterprise's assets. Recommendations include strengthening audit standards, penalizing bad practices and ensuring auditor's independence.

Characteristics, Mapping Understanding, Mapping Errors, and Perceptions of Student-Generated Analogies by Elementary School Students' Approaches to Learning (초등학생의 학습접근양식에 따른 비유 만들기 특성, 대응 관계 이해도, 대응 오류, 비유 만들기에 대한 인식)

  • Kang, Hun-Sik;Cheon, Ji-Hyun
    • Journal of The Korean Association For Science Education
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    • v.30 no.5
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    • pp.668-680
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    • 2010
  • In this study, we investigated the characteristics, the mapping understanding, the mapping errors, and the perceptions of student-generated analogies on the separation of mixtures using the sizes of particles by elementary school students' approaches to learning. Fourth graders (N=92) were selected and administered with the tests on the approaches to learning, self-generating analogies, and perception of self-generating analogies. The results revealed that the meaningful learners made more analogies, especially structural/functional, enriched, and higher systematic ones than the rote learners. However, there were little difference in students' approaches to learning in the subcategories of representation (verbal, pictorial, and verbal/pictorial), artificiality (artificial and everyday), and abstraction (abstract and concrete). The meaningful learners had deeper understanding of the analogy and fewer mapping errors than the rote learners. In addition, the numbers of the shared attributes included in student-generated analogies and the scores of the mapping understanding of the meaningful learners were significantly higher than those of the rote learners. Many students, regardless of students' approaches to learning, had positive perceptions of the self-generating analogies in various cognitive and motivational aspects. However, they also point out the various difficulties in the self-generating analogies as their disadvantages. Educational implications of these findings are discussed.


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