• Phonetics and Speech Sciences
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• v.2 no.2
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• pp.123-133
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• 2010

Speech language pathologists depend on their voice for livelihood and are high risk group of voice disorders. But there are few studies on their prevalence of voice symptoms and voice handicap index. This study aimed to evaluate prevalence of voice symptoms and Korean voice handicap index with 86 speech language pathologists and 90 individuals employed in other occupations. We analyzed self-reported voice symptoms and voice handicap index using a questionnaire for this study. The results showed that the prevalence of voice symptoms of speech language pathologists is 60.5% and voice handicap index scores of speech language pathologists group are significantly higher than those of control group in physical and total score. And we found that alcohol history was a risk factor for voice symptoms. These findings indicate that special vocal hygiene program for speech language pathologists and follow up studies for comparisons of prevalence of voice symptoms and voice handicap index with other professional voice users are necessary.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.10a
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• pp.280-283
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• 2019

통신기술이 1 세에서 5 세대로 발전하는 동안 해상물류의 핵심인 컨테이너는 기능상의 큰 발전없이 과거에 머물러 있다. 이에 본 논문에서는 컨테이너의 위치 및 상태 정보를 수기로 관리하던 기존의 방식에서 벗어나 IoT 장비를 활용해 실시간 위치 파악, 상태 모니터링 및 자동화 등을 통해 물류의 가시성을 확보하고 컨테이너를 효율적으로 재배치함으로써 비용 절감 및 새로운 서비스 창출하기 위한 스마트 컨테이너를 제안한다. 부가적으로, 태양열판을 이용한 전원공급, 펠티어 소자를 이용한 냉방기능을 제공함으로써 신선 식품 배송의 핵심인 풀 코드 체인(Full Cold Chain) 플랫폼으로 활용범위를 넓히고자 한다.

• Journal of the Korea Concrete Institute
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• v.19 no.4
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• pp.467-474
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• 2007

In this paper, a total of 13 beams with bonding, anchorage system, amount of prestressing and span length as variables of experiment were tested in flexural test and analyzed in finite element analysis; one control beam, two simplified FRP-boned beams, four prestressed FRP-unbonded beams and four prestressed FRP-bonded beams. Also, a nonlinear finite element analysis of beams in the flexural test is performed by DIANA program considered material nonlinear of concrete, reinforcement and the interfacial bond-slip model between concrete and CFRP plates. The failure mode of prestressed CFRP plated-beams is not debonding but FRP rupture. RC members strengthened with external bonded prestressed CFRP plates occurred 1st and 2nd debonding of the composite material. After the debonding of CFRP plates occurs in bonded system, behavior of bonded CFRP-plated beams change into that of unbonded CFRP-plated beams due to fix of the anchorage system. Also, It was compared flexural test results and analytical results of RC members strengthened with CFRF plates. The ductility of beams strengthened by CFRP plates with the anchorage system is considered high with the ductility index of above 3. Analysis results showed a good agreement with experiment results in the debonding load, yield load and ultimate load.

• The Journal of the Korea Contents Association
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• v.11 no.5
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• pp.224-232
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• 2011

The purpose of this study was to test the reliability and validity of the Korean version of the fear of daily activities questionnaire (FDAQ) for low back pain patients. Seventy-three subjects with low back pain were participated in this study. The subjects completed ten standardized self-administered questionnaires that measure fear of specific daily activities. The reliability of the acquired data was determined by the intra-class correlation coefficient (ICC) and the Cronbach's ${\alpha}$ for internal consistency. Constructive validity was analyzed by factor analysis, and concurrent validity was acquired from comparison FDAQ scores to the visual analogue scale (VAS) and Oswestry disability index (ODI) scores. The test-retest reliability of the Korean version of the FDAQ showed good ICC (2,1)= 0.96 (95%CI 0.94.0.98) and Cronbach's alpha value was 0.93. Factor analysis suggested two factors solution consisting of spinal loading and spinal movement/posture, it explained 76.1% of the total variance. The concurrent validity was moderately related with pain and disability. Therefore, the Korean version of the FDAQ is a useful method for measuring the fear of daily activities of patients with low back pain.

• Progress in Medical Physics
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• v.25 no.4
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• pp.193-198
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• 2014

The purpose of this study is to see the feasibility of the newly developed 2D dosimetry system using phosphor screen for helical tomotherapy. The cylindrical water phantom was fabricated with phosphor screen to emit the visible light during irradiation. There are three types of virtual target, one is one spot target, another is C-shaped target, and the other is multiple targets. Each target was planned to be treated at 10 Gy by treatment planning system (TPS) of tomotherapy. The cylindrical phantom was placed on the tomotherapy table and irradiated as calculations of the TPS. Every frame which acquired by CCD camera was integrated and the doses were calculated in pixel by pixel. The dose distributions from the fluorescent images were compared with the calculated dose distribution from the TPS. The discrepancies were evaluated as gamma index for each treatment. The curve for dose rate versus pixel value was not saturated until 900 MU/min. The 2D dosimetry using the phosphor screen and the CCD camera is respected to be useful to verify the dose distribution of the tomotherapy if the linearity correction of the phosphor screen improved.

• The Journal of Korean Academy of Sensory Integration
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• v.18 no.2
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• pp.29-41
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• 2020

Objective : This study was conducted to verify the validity of the content of the Behavioral Pediatric Feeding Assessment Scale (BPFAS) following its translation into Korean, to allow the instrument to be used in Korea. Methods : The BPFAS was translated by the researcher and a pediatric occupational therapist with 12 years' experience. To validate the contents of the translated instrument, it was reviewed by three professors in the Department of Occupational Therapy who have taught how to evaluate instruments or conducted related research. The BPFAS was then translated back into English by a professional translator whose native language is English but who is fluent in Korean. The contents of the instrument were verified by using it to survey five parents with normally developed children aged between 9 and 72 months. The BPFAS instrument was successfully revised for use in Korea. Results : The content validity index (CVI) of the Korean version of the evaluation of children's eating behavior was an average of 0.9 points in the fluency area, an average of 0.8 points in the semantic area, and an average of 1 points in the technology area, and the overall average was 0.8 points or more. The average of the content understanding score was 3 points or more. Conclusion : It was confirmed that the Korean version of the BPFAS is an evaluation tool with high content validity and can be usefully used to gather data in clinical trials and research in Korea.

• Korean Journal of Psychosomatic Medicine
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• v.29 no.2
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• pp.136-143
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• 2021

Objectives : The coronavirus disease 2019 (COVID-19) outbreak is a global medical crisis imposing particular burden on public sector employees. The aim of this study was to investigate the psychiatric distress among public sector workers amid the COVID-19 pandemic. Methods : We conducted a cross-sectional study with 531 public sector workers in Gwangmyung city who completed Korean versions of the Perceived Stress Scale (PSS), Patient Health Questionnaire-9 (PHQ-9), and Impact of Event Scale-Revised-Korean (IES-R-K). Results : The results revealed more than moderate levels of stress (85.2%), depressive symptoms (22.2%), and posttraumatic stress symptoms (38.8%). PSS total score was significantly correlated with PHQ-9, IES-R-K total scores as well as IES-R-K subscale scores. Total scores on the PSS, PHQ-9, and IES-R-K were all inversely correlated with age. Conclusions : COVID-19-related workers experience considerable stress and depressive symptoms, with self-rated stress correlating significantly with depression scores. Age may serve as a protective factor against occupational stress and burnout. These findings highlight the need for adequate psychiatric screening and intervention for public sector workers.

• Journal of the Korean Geotechnical Society
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• v.34 no.12
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• pp.115-131
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• 2018

Extension plate attached PHC piles and bolts spliced PHC piles were installed in field test site. Pile integrities were checked during installation with dynamic pile test and the actual pile conditions after installation were compared with integrity index (${\beta}$ index) by PDA test. Theoretically the break in near pile end or pile end (especially extension plate itself) was very difficult to access by integrity index (${\beta}$ index) and also require a high level of knowledge and field experience on PDA test. First actual wave equation of bolts spliced PHC piles due to bolts spliced equipment can be different with welding spliced. Second wave length of the stress wave from installing can be longer than the height of bolts spliced equipment (about 100 mm). Third Beta processing in PDA analysis function is very difficult to access without a high level of knowledge and field experience on wave equation. Above-mentioned three reasons can make conclusion that traditional PDA test in domestic site can not access the integrity of bolts spliced equipment in bolts spliced PHC piles.

• Journal of dental hygiene science
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• v.17 no.1
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• pp.20-29
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• 2017

The purpose of this study was to investigate the validity and reliability of the Korean version of a tool used to measure dental anxiety and fear. The Index of Dental Anxiety and Fear ($IDAF-4C^+$) was translated into Korean, and modified and revised to adapt to Korean culture. A survey was conducted among 457 patients in a dental clinic. The validity and reliability were determined using PASW Statistics ver. 18.0 and IBM SPSS AMOS ver. 21.0. Factor analysis showed that Korean version of $IDAF-4C^+$ was composed of three elements: dental anxiety, dental phobia, feared stimulus. The validity of the model was examined by confirmatory factor analysis and satisfied relevant requirements. All elements had convergent validity and discriminant validity exceeding requirements to ensure validity. Cronbach's ${\alpha}$ showed good reliability. In conclusion, the findings of this study demonstrate that the Korean version of $IDAF-4C^+$ has high validity and reliability. Furthermore, it can be used in clinical practice and research to decrease dental anxiety and fear.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.4 no.4
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• pp.25-36
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• 1984

This paper checked up the safety criteria of the steel structural members by LRFD. And it calculated the resistance and load modulus for it by the proposed method, considering our circumstance, by establisting the taget relability index (${\beta}_0$), and compared their calculated modulus with the nominal safety factors of the road-bridge code and analyzed them. Uncertain quantity measurements fnr the resistance of the steel structural members and for the load effect are due to the method of the uncertain quantity analysis of the load and the resistance, of Galambos-Ravindra and SGST. The summary of the results is as follows: 1) Considering our circumstance, taget relibility index(${\beta}_0$) for current steel structural members are appropriate ${\beta}_0=3.5$. 2) Nominal resistance ${\Phi}^{\prime}$ of the strength design formula for 1) and nominal load modulus ${\gamma}_i^{\prime}$ are as follows; a) Both-sides support plate: ${\Phi}{^{\prime}}=0.75$, ${\gamma}_0{^{\prime}}=1.04$, ${\gamma}_L{^{\prime}}=2.08$ b) One-side support plate: ${\Phi}{^{\prime}}=0.82$, ${\gamma}_0{^{\prime}}=1.04$, ${\gamma}_L{^{\prime}}=2.11$.