목적 : 본 연구는 여가 참여, 여가 탐색 및 방해요인에 대한 다면적 측정이 가능한 노인여가참여 평가도구가 뇌졸중 환자의 여가 평가도구로써 유용하게 사용될 수 있는지 알아보기 위해 신뢰도와 타당도를 검증한 연구이다. 연구방법 : 신뢰도 검증을 위해 뇌졸중 환자 64명이 참여하였으며, 노인여가참여 평가도구를 시행하여 내적 일치도를 분석하였다. 공인 타당도는 단축형 노팅햄 여가 설문지(The shortened version of the Nottingham Leisure Questionnaire)와의 상관관계를 분석하였다. 판별 타당도 검증을 위해 건강한 대 학생 55명이 참여하였고, 두 군간 노인여가참여 평가도구의 평가 결과를 비교하였다. 결과 : 내적 일치도는 전체 문항에 대한 크론바흐 알파 값은 .749로 높은 신뢰도를 나타냈고, 공인 타당도 결과는 단축형 노팅햄 여가 설문지 총점과 노인여가참여 평가도구의 여가 참여 문항 점수 간 상관계수가 .851로 높은 상관관계를 나타냈다(p < .01). 판별 타당도 결과는 두 그룹 간 여가 활동 수, 여가 탐 색의 활동 수, 방해요인에서 통계적으로 유의한 차이가 있는 것으로 나타났다(p < .01) 결론 : 노인여가참여 평가도구는 뇌졸중 환자를 대상으로 평가가 가능하다는 것을 신뢰도 및 타당도 검증을 통해 확인하였다. 여가 참여에 대한 다면적 측정이 이루어지는 노인여가참여 평가도구를 통해 뇌졸중 환자의 여가 중재 계획 및 실행에 유용하게 적용할 수 있기를 기대한다.

PURPOSES : This study defines travel time reliability as a concept that explains the change in travel time that passengers can hardly predict and calculates the value of travel time reliability based on travel objectives. METHODS : Because the reliability of passage time is difficult to estimate from actual passenger data, standard quantification measures have not been established despite various interests. In this study, the reliability of transit time was defined as the expense that passengers did not recognize in advance, such as an accidental delay caused by unforeseen circumstances. For analysis based on the individual behavior of users, the data were constructed using the optional experiment method (marginal rate of substitution method) of the stated preference survey, which has the advantage of controlling the correlation between attribute variables and maintaining the independence of the data of the study. RESULTS : Consequently, the reliability value of travel time in mandatory-purposed traffic was almost identical to the value of travel time, and the reliability value of travel time in return and shopping/leisure, which is not mandatory during non-business-purpose traffic, is lower than the value of travel time. Comparing and analyzing with existing studies on estimating the reliability value of transit time, both work/ non-work purposes are in line with the overall research results. CONCLUSIONS : Estimating the reliability value of transit time for each purpose of passage was the first attempt, and it is meaningful to suggest a direction for quantifying and applying the reliability value of transit time along with the passage time value of this study.

Currently, there are two types of trainer in Korea : basic and advanced. Both models have been in operation for more than 10 years, and compared to the early stage of operation, reliability has gradually improved and failure rates have also entered a trend of stabilization. Therefore, it is necessary to extend the maintenance period considering economic feasibility. This study investigates the three maintenance period calculation methods: NAVAIR 00-25-403 [17], DOD, U.S. [4], CERL and US Army [3], with intention to extend the maintenance period of the trainer from current 200 hours to 400 hours. In addition, the maintenance period was calculated by the three methods with actual operational data. Common standards and procedures were established to apply operational data to the existing maintenance period calculation methods, the required reliability indicators were derived, and the maintenance periods was calculated based on the results, additionally, a review on the field applicability of the three maintenance cycles was conducted. An on-site interviews were conducted with the calculation results, and 11 out of the 15 items were expected to be extended by 400 hours. It was suggested that the remaining 4 items could be extended to 400 hours by supplementing the inspection method through additional analysis such as functional analysis, inspection content verification, and site connection.

Background: With the increasing elderly population, the need for gait analysis of these elderly individuals is also increasing. Most devices are costly and not portable; however, smartphones using built-in sensors capable of measuring motion and are easily available. Objectives: To examine the reliability and validity of knee joint angles of the elderly using smartphone measurements during walking. Design: Quasi-experimental research. Methods: Sixteen elderly people, aged 65+ and living in Daejeon and Chungbuk, South Korea, participated in the study. Electrogoniometers and smartphones were attached to the thigh and the side and front of the shank of each subject, respectively, using double-sided tape, an arm band, and an elastic band. Each subject completed two sets of at least seven gait cycles (14 steps). Results: Both the smartphones and electrogoniometers exhibited high agreement in terms of their primary and secondary measurements (ICC>.75). The agreement between the smartphones and electrogoniometers was also high in terms of both the primary and secondary measurements (ICC<.60). Conclusion: These results indicate that smartphones can be costly equipment cannot, even though they cannot completely replace existing clinical-grade devices. Their utility is emphasized herein for measuring knee joint angles of the elderly during walking.

The study evaluated the accuracy and intra-rater reliability for OWAS (Ovako Working posture Analysing System), RULA (Rapid Upper Limb Assessment), REBA (Rapid Entire Body Assessment) to improve their evaluation accuracy and reliability. Participants (n = 163) with undergraduate degree were recruited in this study and trained for 6 hours about the ergonomic assessment methods. Ergonomic assessments were conducted using OWAS, RULA, and REBA for a representative work with dynamic posture found in manufacturing industries. The study compared action categories (overall level) and detailed evaluation scores for individual body part. Action categories of the participants significantly differed from the golden reference defined by ergonomic experts. The participants underrated or omitted scores for truck (37.4% of the participants) and legs (52.8%) in OWAS. Similarly, the participants underrated or omitted additional scores for all body parts except the hand and wrist in RULA (53.5%) and REBA (54.8%). On the other hand, the participants overrated scores for the hand and wrist in RULA (55.2%) and REBA (39.9%). The results found in this study can help of selecting focus points and parts during assessment and education to improve accuracy and reliability of the ergonomic assessment methods.

Background: The Functional Assessment of Chronic Illness Therapy (FACIT) for Dyspnea was developed to assess multidimensional dyspnea using two subscales (experience of dyspnea and functional limitation) and a total score. Objects: This study aimed to assess the reliability and validity of the Korean version of the FACIT-dyspnea 10-item short form questionnaire (FACIT-dyspnea-K). Methods: Subjects were 163 patients with cancer. Dyspnea-related scales (modified Medical Research Council scale [mMRC], European Organization for Research and Treatment of Cancer Quality of Life Questionnaire-Core 30 [EORTC QLQ-C30], Hospital Anxiety and Depression [HAD], and WHO Performance Scale) were used to validate the FACIT-dyspnea-K. Results: Internal consistency was confirmed by Cronbach’s alpha values of 0.90 and 0.95 in factors 1 and 2, respectively. Convergence validity was determined by comparing the two factors and total score of the FACIT-dyspnea-K with conceptually related assessment tools measuring the physical and emotional effects of dyspnea, with which correlations ranged from 0.364 to 0.567. Criterion validity was established by significant differences in the FACITdyspnea- K score between groups when the patients were classified by performance status as assessed by the WHO performance scale. Furthermore, the FACIT-dyspnea-K showed notable correlations with other dyspnea scales (mMRC, EORTC QLQ-C30, and HAD) for cancer patients (r = 0.28 to 0.54). The test-retest reliability of the two factors and total score of the FACITdyspnea- K appeared to be excellent (Cronbach’s alpha = 0.96 to 0.97). Conclusion: This study supports FACIT-dyspnea-K as a valid and reliable instrument to assess the dyspnea experience of cancer patients in clinical settings.

PURPOSES : This study was purposed to investigate whether the current passing sight distance standard is appropriate. Therefore, to determine a safe passing sight distance, data collected from the observations of a two-lane road were implemented in reliability analysis to develop a realistic passing sight distance model. METHODS : First, passing sight distance data were collected for analysis from two-lane roads in Jeollabuk-do. Next, the speed profile was generated based on the collected data in order to analyze driver behavior. Finally, a model reflective of the driving behavior of motorists was developed and compared to the existing passing sight distance standard using reliability analysis. RESULTS : As compared to the existing model for safe passing sight distance, the actual speed of the overtaking vehicle indicated higher acceleration and a longer acceleration duration. The entire model, with exception of the d1 section, was modified to reflect the overtaking behavior of motorists d1. d2 was set to correspond to the time until the vehicles run side by side (t21); Time t22 was set to correspond to the time until subsequent recovery to the main lane, and d3 was set to range between 19 and 47 m following review of the actual passing sight distance data. In addition, d4 was computed to be two-thirds of the distance d2, and the oncoming car was found to drive at a constant speed that was similar to the speed associated with d2 . Analysis of the reliability of the existing Korean passing sight distance standard revealed that the current standard does not recommend a safe passing sight distance for drivers. CONCLUSIONS : As compared to the existing passing sight distance criterion, the actual speed and acceleration that driver apply to overtake a vehicle are higher, and the existing passing sight distance criterion is shorter than the actual passing sight distance. Additionally, the results of reliability analysis revealed that the proposed model developed to reflect driver overtaking behavior has more explanatory power than the existing one. Therefore, it is necessary to introduce new design standards that implement passing sight distance variables that are relevant to local drivers.

The purpose of this study is to provision the standard method for ensuring the reliability of measuring indoor air quality in public transportation. The objective is to determine the difference in the measured concentration values according to various conditions. These variables include measurement conditions, measurement equipment, measurement points, and measurement time. The value differences are determined by measuring the PM10 and CO2 concentration of subways, and express buses and trains, which are targets of indoor air quality management. The concentration of CO2 was measured by the NDIR method and that of PM10 was measured by the gravimetric method and light-scattering method. Statistically, the results of the concentration comparison according to the measurement points of the public transportation modes were not significantly different (p > 0.05), and it is deemed that the concentration is not affected by the measurement points. In terms of the concentration analysis results according to the measurement method, there was a difference of the concentration between the gravimetric and light scattering method. In the case of the light scattering method, the concentration differed depending on whether it was corrected with standard particles in the laboratory environment.

Sand casting 3D printing uses a binder jetting method to produce a mold having complicated shape by spraying a binder on sand coated with activator. Appropriate heat treatment process in sand mold fabrication can increase the degree of polymerization to improve flexural strength. However, long heat treatment of over 24 hours decreases flexural strength and reliability due to chemical bond decomposition through thermal degradation. The main role of the activator is to control the reaction rate between the polymer chains. As a result, when the activator composition is increased from 0.15 wt% to 0.25 wt%, the flexural strength is increased by 218 N/cm2. However, excess activator (0.40 wt%) has been shown to decrease reliability without increasing flexural strength. The main role of the binder is to control the flexural strength of the specimen. As the binder composition is increased from 2.00 wt% to 4.00 wt%, the flexural strength increases to about 255 N/cm2, indicating the maximum flexural strength increase. Finally, the reliability of the flexural strength of the fabricated specimens is evaluated by a Weibull plot. Weibull modulus calculations are used to evaluate the flexural strength reliability of the specimens, and maximum reliability value of 11.7 is obtained at 0.20 wt% activator composition. Therefore, it is confirmed that this composition has maximum flexural strength reliability.

목적 : 본 연구에서는 뇌졸중 환자를 대상으로 Tablet PC 기반 인지 평가도구와 MMSE-K, MoCA-K를 비교하여 공인타당도와 Tablet PC 기반 인지 평가도구의 검사-재검사를 시행하여 신뢰도를 알아보고자하였다. 연구방법 : 본 연구는 2018년 6월 18일부터 2018년 9월 16일까지 시행하였으며, 울산에 소재한 종합병 원에 입원하여 작업치료를 받는 67명의 아급성 뇌졸중 환자를 대상으로 하였다. 평가는 MMSE-K, MoCA-K, Tablet PC 기반 인지 평가도구를 사용하였다. 공인타당도와 검사-재검사 신뢰도는 Pearson 상관분석을 사용하였다. 결과 : 공인타당도를 분석한 결과 Tablet PC 기반 인지 평가도구와 MMSE-K의 상관계수는 r=.85(p<0.01), MoCA-K의 상관계수는 r=.86(p<0.01)로 높은 공인타당도를 보였다. 신뢰도는 r=.97(p<0.01)로 검증 되었다. 결론 : 본 연구를 통해 Tablet PC 기반 인지 평가도구의 공인타당도와 신뢰도를 검증하였으며, Tablet PC 기반 인지 평가도구가 임상에서 인지 평가도구로서 사용될 수 있는 근거를 제시하였다.

Background: Although magnetic resonance imaging is accurate, it is expensive to measure the movement of temporomandibular joint. The three-dimensional (3D) motion analysis system is an inexpensive measurement tool. Objects: This study examined the reliability of quantifying the mouth opening and lateral mandibular shift and differences between individuals with and without temporomandibular disorder (TMD) using the hygienic method of surface markers on the skin with 3D ultrasound-based motion analysis. Methods: This study included 24 subjects (12 with and 12 without TMD). Temporomandibular joint motion during mouth opening was recorded using two surface markers with 3D ultrasound-based motion analysis. An intraclass correlation coefficient [ICC (3,k)] was used to confirm the intrarater reliability of quantifying kinematic temporomandibular joint motion, and an independent t-test was used to evaluate differences in maximal mouth opening and lateral mandibular shift between the two groups. Results: Assessment of mouth opening and lateral mandibular shift showed excellent test–retest reliability with low standard error of measurement. The lateral mandibular shift and opening-lateral mandibular shift ratio were significantly increased in the TMD group during maximum mouth opening (p<.05). However, no significant difference in maximal mouth opening was observed between the groups with and without TMD (p>.05). Conclusion: This hygienic and simple surface marker method can be used to quantify the mouth opening and lateral mandibular shift at the end-range of mouth opening. The TMD group showed an increased lateral mandibular shift movement at the end-range of mouth opening. The lateral mandibular shift movement can be regarded as a symptom in the diagnosis and treatment of TMD.

Background: The hyoid bone is the only non-jointed structure among the skeletal tissues of the head and neck region, and its movement and posture depend on the attached muscle, ligament, and fascia. The location of the hyoid bone is important for airway maintenance, vocalization, chewing, swallowing, breathing, and head and scapular position. In general, the location of the hyoid bone is measured using radiographs and 3D computed tomography, and no studies have reported on clinical measurement methods. Objects: This study was performed to suggest clinical measurement methods for lateral deviation of the hyoid bone and to evaluate their reliability. Methods: In this study, 24 healthy volunteers (12 males, 12 females) in Cheongju-si participated. Two examiners performed the center point test and lateral motion test twice each to measure the lateral displacement of the hyoid bone. The reliability of the center point test was analyzed using intra-class correlation coefficients (ICC), and the reliability of the lateral motion test was analyzed using Cohen’s kappa coefficient. Results: The intra-rater reliability of the center point test was good, and the inter-rater reliability was moderate. The intra- and inter-rater reliability of the lateral motion test showed substantial reliability. Conclusion: Based on these results, the center point test and the lateral motion test can be used as an alternative methods of the measurement of lateral deviation of the hyoid bone for people who have musculoskeletal disorders of the head, neck, and scapula.

스포츠 상품 시장에서 각 브랜드가 소비자에게 미치고자 하는 영향력은 여러 가지 형태로 시도 되었으며, 그 효과 또한 증명되어 가고 있다. 각 브랜드들이 자신들이 활용할 가치가 있다고 판단하여 수립한 다양한 마케팅 전략들이 증명되어가고 있는 것이다. 하지만 최근 나타난 새로운 소비 유형이라 할 수 있는 스포츠 상품 수집가를 활용한 마케팅 전략은 지금껏 그 영향력이 실증적으로 검증된 바가 없었다. 기존의 스포츠 상품 시장에서 나타난 수집 행위에 이해도가 매우 낮았기 때문이다. 어느 정도 한계에 봉착했다고 여겨지는 스포츠 상품 시장에 새로운 마케팅 전략이 필요하다고 판단한 도전적 사고에서 본 연구를 시작하였으며 스포츠 상품 수집가를 활용한 마케팅 전략을 수립함에 있어서 그 영향력이 형성되는 경로를 설정하고 증명하는데 그 목적을 두고 있다. 이 연구의 목적을 달성하기 위하여 가상의 스포츠 상품 수집가의 상품 설명에 대한 자극물을 접한 잠재 소비자 231명을 대상으로 SPSS 21.0과 AMOS 20.0을 이용하여 빈도분석, 신뢰도분석, 상관관계분석 및 확인적 요인분석과 구조방정식을 이용하였다. 이 연구에서 도출된 결과를 바탕으로 하여 스포츠 상품 시장에서 스포츠 상품 수집가들이 보유하고 있는 전문성을 바탕으로 하는 새로운 마케팅 전략의 경로를 발견하였다고 할 수 있으며, 이를 바탕으로 침체된 우리나라 스포츠 상품 시장에 새로운 성장 동력의 하나로 작용할 수 있기를 기대하는 바이다.

목적 : 본 연구는 8~19세 아동 및 청소년의 가정, 학교, 지역사회, 공동체 생활에서의 참여를 측정할 수 있는 참여 평가도구인 The Child and Adolescent Scale of Participation(CASP)을 우리나라 문화에 적합하게 한국어로 번안하고, 타당도와 신뢰도를 검증하여 한글판 CASP를 개발하고자 하였다. 연구 방법 : 본 연구는 장애 22명 및 비장애 38명을 모집하였으며, 아동 및 청소년 총 60명을 대상으로 2018년 9월부터 2019년 1월까지 약 5개월간 진행되었다. 아동 및 청소년의 보호자를 대상으로 한글판 The Child and Adolescent Scale of Participation(CASP)을 자가 보고식 설문으로 진행하였다. 수집 된 자료는 Statistical Package for Social Science(SPSS) 통계분석 프로그램을 사용하여 타당도 및 신뢰도를 검증하였다. 결과 : 대상자의 일반적 특성에 대한 검증에서는 두 집단 간 유의한 차이를 보이지 않았으며, 장애 유무에 따른 집단 간 점수를 비교한 결과, 한글판 CASP의 타당도 검증에서 유의미한 차이가 발생하여 높은 판 별타당도가 검증되었으며, 신뢰도 검증에서는 높은 수준의 내적일치도와 검사-재검사 신뢰도를 확인하였다. 결론 : 한글판 CASP는 장애 유무에 상관없이 아동 및 청소년을 대상으로 참여를 평가할 수 있는 참여 평가도구이다. 본 연구를 통해 높은 수준의 타당도와 신뢰도가 확인되었다. 연구결과를 바탕으로 작업치료 임상 및 연구에서 장애 학령기 아동 및 청소년의 효과적인 참여 증진을 위한 치료 계획 수립의 기초자료로 활용되기를 기대한다.

목적 : 본 연구의 목적은 활동분석과 프로세스 맵핑을 기반으로 한 Korean version of Modified Barthel Index(K-MBI) 가이드북을 제작하여 내용 타당도와 평가자 간 신뢰도 및 일치도를 확인하고자 하였다. 연구방법 : 본 연구에서는 활동분석과 프로세스 맵핑을 기반으로 한 K-MBI 가이드북을 개발하였다. 개발 된 K-MBI 가이드북에 대한 이해도 조사 및 수정을 하여 최종 가이드북을 제작하여 40명의 작업치료 전문가 집단에 내용 타당도를 검증하였다. 평가자 간 신뢰도 및 일치도 조사를 위해 기존의 K-MBI 검 사 지침에 근거하여 총 5명의 환자의 일상생활활동 동영상을 촬영하였다. 평가자 간 신뢰도와 일치도 조 사는 84명의 작업치료사가 교육 전과 후에 동일하게 동영상 속의 5명의 환자를 평가하여 확인하였다. 결과 : 내용 타당도 검증 결과는 개발된 K-MBI 가이드북 11개의 모든 항목에서 CVI 점수가 .93 이상으 로 높은 수준의 타당도를 나타내었다. 평가자 간 신뢰도에서는 ICC가 교육 전 .983, 교육 후에 .982로 교육 전과 후 모두 높은 수준의 신뢰도를 보였다. 정답률의 변화는 교육 전 48.37%에서 교육 후에 69.48%로 향상되었고, 평가자 간 일치도는 옷 입고 벗기 항목을 제외한 모든 항목에서 일치도가 향상 된 것으로 나타났다. 결론 : 본 연구의 결과를 통해 활동분석 및 프로세스 맵핑을 기반으로 한 K-MBI 가이드북은 일상생활활 동 평가에서 평가자 간의 신뢰도와 일치도를 향상되게 시키는 것으로 확인되었다.

Background: Spontaneous use of the upper extremities on the affected side of patients with stroke is a meaningful indicator of recovery and may vary by the age or dominant hand of patients. No prior study has reported changes in actual amount of use test (AAUT) and motor activity log (MAL)-28 according to age and handedness in healthy adults, and AAUT inter-rater reliability for assessment of healthy adults. Objects: This study aimed to (1) research the differences in AAUT and MAL-28 according to age and handedness in healthy adults, and (2) determine the inter-rater reliability of the AAUT. Methods: Seventy healthy adults participated in this study. The MAL-28 was assessed by dividing 61 subjects into young right-handed (n1=20), young left-handed (n2=21), and older right-handed (n3=20) groups. The AAUT was assessed by dividing 63 subjects into young right-handed (n1=25), young left-handed (n2=18), and older right-handed (n3=20) groups. Student’s t-test and the Wilcoxon signedrank test were used for statistical analysis. Results: The Amount of Use (AOU) scale values for each group showed no significant differences between age groups and handedness groups in the MAL-28 (p>.05). The AAUT AOU scale value showed significant differences regarding dominant handedness in the AAUT (p<.05), but no significant differences according to age (p>.05). (2) Inter-rater reliability of the AAUT was excellent, except few items (item 9, 11, and 12). Conclusion: Although both the MAL-28 and the AAUT measured how much participants used their dominant arms in healthy subjects, the AAUT only showed significantly higher dominant arm use in left hander than the right hander. In addition, the inter-rater reliability of the AAUT was excellent. Current results can be utilized as a basic information when clinicians develop rehabilitation strategies, and AAUT was shown to be a reliable evaluation tool for measurement of upper extremity use in Korean adults, based on the reliability demonstrated by this study.