• Transactions of the KSME C: Technology and Education
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• v.3 no.3
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• pp.165-173
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• 2015

This paper presents numerical results of static structural stability analysis in development of a vertical transfer device of a PRT(Personal Rapid Transit) vehicle. The vertical transfer of a fully occupied vehicle operating on a road network is the first attempt, which is expected to contribute to overcome the limitations of conventional 2-dimensional operation mode. In particular, the vertical transfer apparatus designed based on vertical circulating conveyors is capable of continuous transfer without time delay so that it enables to accommodate a high traffic density. This system has been frequently used in a logistics field; however, it is essential to assess a structural integrity because an external force by a vehicle weight is exerted on the conveyors in the form of a concentrated load unlike a conventional logistic transport. In this study, prior to the production process, the structural performance of the pilot design in an early stage is numerically evaluated using the commercial finite element method (FEM) solver (i.e., $Ansys^{(R)}$).

• Journal of radiological science and technology
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• v.32 no.4
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• pp.371-380
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• 2009

This study was executed to find out the intensity of turnover intention and its associated factors of radiologic technologists who worked for private clinic and university hospitals in Daejoen. Such variables as social and demographic characteristics, job-related features, job stress, job satisfaction, job performance, organizational commitment and turnover intention were investigated based on the survey of randomly sampled 400 radiologic technologists. The results are summarized as follows. 1. College graduates of private clinic workers were significantly higher than junior college graduates of them in the mean score for turnover intention. And low age groups, unmarried group, no religion group, low job career groups and low income groups of university hospital workers were significantly higher than high age groups, married group, religion group, high job career groups and high income groups of them respectively in the mean score for turnover intention. 2. Private clinic and university hospital workers' low and high groups in the variables of job demand, job control, supervisor support, job satisfaction, organizational commitment showed significant difference in the mean score for turnover intention. specially private clinic workers' low and high groups in the variables of coworker support, job performance showed significant difference in the mean score for turnover intention. 3. A hierarchial multiple regression analysis was conducted to catch the influence of related variables on turnover intention according to private clinic workers and university hospital workers. As a result of the analysis, the higher the degrees of education and job demand were and the lower the degree of job satisfaction was for private clinic workers, the higher the degree of turnover intention was. And the lower the degrees of age, job career, job satisfaction and organizational commitment were for university hospital workers, the higher the degree of turnover intention was. In conclusion, it was found that job demand and job satisfaction for private clinic workers and job satisfaction and organizational commitment for university hospital workers influenced on turnover intention.

• Journal of radiological science and technology
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• v.33 no.3
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• pp.203-211
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• 2010

The purpose of this study is meant to develop an evaluation framework for PBL and S-PBL package, as well as verify reliability and propriety of developed framework. To achieve the purpose, existing researches and related documents were considered, and composed basic questionnaire which fits to the basic frame of the framework, 3 categories 15 items for PBL/S-PBL. Verifying its contents propriety, examined by 9 experts who professors in college and made 14 items for PBL, 15 items for S-PBL. To verify construct validity of basic frameworks, carried out factor analysis. Final evaluation framework questionnaire were 15 items selected, its PBL for 3 items in motivating, 7 items in integrity, 4 items in systematic and total 14 items, S-PBL for 4 items in motivating, 6 items in integrity, 5 items in systematic and total 15 items, and was verify to have adequate reliability with Cronbach's $\alpha$ is 0.9112 in PBL, 0.9166 of S-PBL.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.26 no.4
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• pp.295-310
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• 2015

Objectives : Symptoms of attention-deficit hyperactivity disorder (ADHD) during childhood may persist into adulthood. This study included the development and validation process of the Korean Adult ADHD Rating Scale (K-AARS), which was developed for screening and monitoring treatment of adults with ADHD. Methods : Preliminary questionnaires of the K-AARS were based on the reviews of previous adult ADHD scales and clinical experiences of the board certified child and adolescent psychiatrists in Korea. For this study, 136 adults (18-50 years old) with inattention, hyperactivity and/or impulsivity symptoms were enrolled as ADHD subjects, and compared with 406 control subjects (18-50 years old) without ADHD symptoms. Construct validity was examined using explorative factor analysis and Cronbach's alpha to obtain internal reliability coefficients. Concurrent validity was evaluated by comparison with the Conners' Adult ADHD Rating Scale (CAARS). Results : An explorative factor analysis showed that the K-AARS had 8 factors (inattention, hyperactivity, impulsivity, antisocial personality disorder/conduct disorder/oppositional defiant disorder, impairment, driving, emotional dysregulation, disorganization). K-AARS was highly reliable in terms of internal consistency (Cronbach's alpha 0.77-0.95) and correlation between factors (0.57-0.86). Concurrent validity with the CAARS and discriminant validity were statistically significant. Conclusion : The K-AARS is a valid and reliable measure for assessment of Korean adults with ADHD.

• Transactions of the KSME C: Technology and Education
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• v.1 no.2
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• pp.167-177
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• 2013

The use of mechanical anastomosis coupler instead of sutures has been increasing in microvascular anastomosis surgery. However, non-biodegradable anastomosis coupler has problems such as not only inflammatory reaction but also remaining permanently in operation wound. Therefore, we fabricated biodegradable anastomosis coupler using injection molding process to overcome the limitation of non-biodegradable anastomosis coupler. In various injection molding process conditions, the shrinkage was calculated with different cylinder temperatures and injection molding pressures and anastomotic strength was measured. As a result, changes in shrinkage hole part larger than the pin part. In addition, the shrinkage in the cylinder at higher temperatures increase. However, the higher the injection pressure, shrinkage tends to decrease, respectively. In-vitro degradation behavior of PCL anastomotic coupler evaluated for 12 weeks, water uptake was increased and molecular weight was accompanied by a reduction in mass of the biological degradation and reduction of anastomotic strength was confirmed. However, decreased levels of anastomotic strength enough to exceed the requirements of preclinical surgery, PCL microvascular anastomosis coupler suitable candidate materials that could identify.

• Analytical Science and Technology
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• v.25 no.1
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• pp.39-49
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• 2012

A method to detect 37 volatile organic compounds (VOCs) in surface water was described based on headspace solid-phase micro extraction and gas chromatography-mass spectrometry. VOCs in water were vaporized for 30 min at 40 $^{\circ}C$ in a headspace vial and adsorbed on 85 ${\mu}m$ carboxen-polydimethylsiloxane. Under the established condition, the lowest quantification limit was 4.1-96 ng/L by using 4.0 mL water sample, and the relative standard deviation was less than 15% at concentrations of 0.05 and 0.50 ${\mu}g/L$. The detection limits meet lower concentration than 1/10 of the water quality criteria for VOCs established by the US EPA or Germany. The LOQ is a sensitivity which the monitoring for the establishing water quality criteria requires. When the proposed method was used to analyze the target compounds in sixteen surface water samples and total 16 VOCs were detected in surface water samples collected from Gum-River. Maximum concentrations of VOCs detected were not exceeded the EPA or Germany guidelines in any of the samples.

• Journal of the Korean Society of Radiology
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• v.12 no.2
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• pp.225-231
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• 2018

Recently, new teaching methods for communicating with teachers and students have been emerged according to the trends of decreasing the school-age population and the development of the mass media. We have applied teaching-learning model based on the flip learning to the college students in this work. As a result of the test for the customized flipped learning teaching-learning model in pre-class, the attendance rate of the major subject was 92.3% whereas that in liberal arts courses other than majors revealed 87.6%. This result for attendance rate shows that first year students in the radiology department have been actively participated in pre-class of the major subject than that of the liberal arts curriculum. From comparing the differences between the study group that was applied flipped learning in class and the non-applied group, the research group showed higher scores in knowledge, skills, and attitudes than the comparative group. In addition, more than 90% of the learners improved their responsibility, problem solving ability, creative thinking, cooperative ability, and communication ability through this learning program. From the test for the difference in the role of radiologists in the post class, the mean score was 4.40 for the group applied the teaching-learning model while that for non-applied group was 2.10. Hence, from such results, we see that this teaching-learning model is appropriate and needs to be extended to cultivate basic skills in radiology and relevant vocational education.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.5
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• pp.871-878
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• 2017

The quality control personnel of the construction work shall establish and execute the quality control plan or the quality test plan and check the qualification of the used materials according to the process, the management of the test and inspection equipment, the quality education, the own quality inspection and measures. Management and quality test of Korea and plays an important role in preventing accidents. However, related organizations did not explicitly disclose their roles in quality testing and quality control tasks while changing the names of quality control personnel to test personnel and quality managers when revising related laws and regulations and the application of labor costs. Therefore, a research of this is needed to improve conflicting situation. In this study, the ambiguous title relation to the quality control persons is improved to meet the requirements of the construction work based on related laws and regulations, and each role and title is classified as 'quality tester' and 'quality manager'. In other words, the person who carries out the quality test of the "Construction Quality Test Standard" specified in the Guideline for Quality Management of Construction Projects shall be the "Quality Tester" and the person who performs the quality control plan establishment and execution work specified in the Enforcement Rule of the Construction Technology Promotion Act shall be referred to as the 'Quality Manager'.

• Journal of Digital Convergence
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• v.14 no.11
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• pp.225-232
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• 2016

The purpose of this study is to analyze the effect of the glass ceiling induction factors on the improvement of the job Commitment on the glass ceiling perception and to analyze the effect of the organizational Commitment on the influence of the local medical institute and private medical institute employees. Purpose. As a research method, structural equation model analysis was carried out to investigate the influence relationship of each factor. In particular, multiple group analysis was performed to analyze the difference of influence relations between public and private medical personnel. Respectively. Result, First, empirical studies on the effect of the glass ceiling inducing factors on job Commitment showed that job Commitment was influenced by stereotype and organizational culture, and the magnitude of the influence was different. Second, the employees of the room medical center were influenced by perceived promotion, job placement, education and training, reward, and job satisfaction. Third, in the hypothesis that job Commitment will be affected by the perception of glass ceiling, only the workers of the private medical center showed significant results. Based on the results of this study, it will be necessary to plan policies to improve the perception of the glass ceiling phenomenon and improve its status in order to improve the personnel and system that women workers in the medical field can enter more senior management positions.

• Korean Journal of Human Ecology
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• v.20 no.4
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• pp.861-869
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• 2011

This paper examined the frequency of skipping breakfast by middle school students for one week. It carried out the study in order to understand the ways skipping breakfast effected other habits. The subjects were 467 middle school students (219 boys, 248 girls). The results of the survey were as follows; average male students were $171.16{\pm}5.9cm$, $61.45{\pm}10.0kg$, and $20.93{\pm}2.9$ in height, weight and body mass index, while the average female students were $159.27{\pm}6.0cm$, $51.62{\pm}7.9kg$ and $20.33{\pm}2.8$. As for the reasons for skipping breakfast, 58.0% of the subjects responded that they had no time. The frequency of skipping breakfast was divided into the eating group (0~1 time) and the skipping breakfast group (2~3times/week, 4~5 times/week, or 6~7 times/week). As the frequency of skipping breakfast increased, so the rate of the subjects eating alone was higher and eating with family lower(p<.05). The dietary behavior change stage was divided into contemplation stage, preparation stage, action stage, and maintenance stage. The eating group(59.2%) was higher than the skipping breakfast group(29.1%~46.3%) in the rate of subjects maintenance stage(p<.01). Accordingly, skipping breakfast was closely connected with eating habits in their families. A dietitian needs to teach the importance of meals and life habits, so as to enhance public awareness of health and nutrition to the students. Subjects of nutrition education must even enlarge their parents as well as the students.