• Korean Journal of Construction Engineering and Management
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• v.18 no.2
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• pp.38-48
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• 2017

Finding causes of workers' unsafe behaviors is important to prevent construction accidents because 80 percent of accidents occur by workers' unsafe behaviors. In this regard, this research aims to investigate possible reasons of workers' unsafe behaviors based on workers' cognitive process model using System dynamics. This study is based on two ways of workers' cognitive process which are in relation to hazard perception and failure of hazard perception. Based on existing literature, causal loops for workers' cognitive process are developed to explain workers' habituation by staying out of accidents, safety learning by experience, failure of hazard perception, and attitude change by accidents. The interactions between the developed loops provide managerial insights to reduce workers' unsafe behaviors from a safety manager's perspective including increasing the probability of workers' hazard perception through knowledge management, maintaining workers' positive attitude toward safety, and controlling first-line supervisors to eliminate workers' unsafe behavior. The research allows us to better understand the causes and solutions of workers' unsafe behaviors in workers' cognitive perspectives.

• Journal of the Korean School Mathematics Society
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• v.20 no.4
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• pp.521-536
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• 2017

One of difficulties with which teachers meet is to have underachievers with no willingness and motivation for study involved in class. Mathematics underachiever are average or above average in their intelligence but their actual achievement in mathematics did not coincide to their intellectual capabilities. The teaching strategy for them is to motivate them to try to study mathematics and to experience the improvement in their mathematics grade. In this paper, we choose flipped classroom as the strategy of teaching basic mathematics to math underachievers and applied it to them. Then we wanted to make sure the possibility for applying flipped classroom to teaching math underachievers through the analysis of change in the scholastic achievement of students in mathematics and mathematical disposition. The results of this study are as followings; First, when we taught basic math to underachievers using a flipped classroom, we confirm that math underachievers with active participation improved scholastic achievements significantly. Second, the flipped classroom was led to positive effects in an affective domain. In particular, it showed the most noticeable change in the area of willingness to math problem-solving and perception about the value of mathematics.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.6
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• pp.618-628
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• 2016

This study was conducted to identify the influence of clinical practice stress and communication skills on the ego-resilience of nursing students. The subjects were 122 nursing college seniors in B city who have experience in clinical practice. Data were collected from March 23 to 30, 2015, and analyzed by the t-test, ANOVA, Scheffe's test, Pearson's correlation coefficients and multiple regression. It was found that there were significant differences in the ego-resilience depending on the gender, satisfaction with nursing major and relationships among fellow students during clinical practice. There was a significant positive correlation between ego-resilience and communication skills. The meaningful variables which influence the ego-resilience were communication skills, satisfaction with nursing major, relationships among fellow students during clinical practice and gender. These factors were responsible for 38.9% of the total variance in the ego-resilience of the nursing students, and communication skills were the most influential factor. In conclusion, to increase the ego-resilience of nursing students, it is necessary to develop effective communication training programs and strategies to improve their satisfaction with the nursing major and relationships among fellow students during clinical practice.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.12
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• pp.8585-8595
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• 2015

This study was implemented to amass and analyze the data from 500 Seoul district beauty shop workers, which came from the use of the SPSS18.0. The statistical analysis was conducted through frequency for demographic characteristics, validity for factors analysis by using Varimax rotation, and reliability for Cronbach's alpha coefficient.. Also, the analysis was once again analyzed through the Pearson correlation coefficient, where our hypothesis was proven through regression analysis. Our research results have shown that, first, job satisfaction and job performance differed over matters like gender, age, education level, employment conditions, job category, overall work experience, daily work hours, and monthly income. Second, job satisfaction was shown to have a significant influence on job performance, where higher job satisfaction levels led to higher job performance. Thus, job satisfaction was a great factor to increase job performance by fulfilling their needs level. Also, they would act more positive and future-oriented when they have special needs like motivate achievement, wage, promotion, and reward. Therefore, managerial staff should continually develop any programs in order to upgrade beautician's job performance through their job satisfaction.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.12
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• pp.8487-8497
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• 2015

The purpose of this study was to determine the relationship between of oral health belief and self-efficacy on oral health awareness for marriage migrant women's in the Yeongnam region and provide basic data that could help develop programs necessary to improve oral health awareness and change attitudes; for this purpose, a self-administered questionnaire based on interview was used in marriage migrant women's using eight multicultural centers in Daegu and North and South Gyeongsang Provinces from October 1 to December 15, 2013 and 256 copies were finally analyzed. The statistically analysis was performed using SPSS 18.0 and AMOS 7.0, with the statistical significance level set at p<.05. As for the effects of oral health belief and self-efficacy on oral health awareness, the experience of scaling was affected by seriousness(${\beta}$=.568) among the factors of oral health belief(p<.05), oral health status was affected by sensitivity(${\beta}$=-.391)(p<.01), and oral health concern was affected by sensitivity(${\beta}$=-.183), seriousness(${\beta}$=.172), usefulness (${\beta}$=.224), and self-efficacy(${\beta}$=.237)(p<.01). It is necessary to analyze the effects of oral health belief and self-efficacy on oral health awareness, make positive efforts to develop preventive oral health management and oral health education programs, and make fundamental policies for improving oral health in multicultural families so that marriage migrant women's can make efficient oral health management.

• Parasites, Hosts and Diseases
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• v.47 no.3
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• pp.299-302
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• 2009

The incidence of imported malaria has been increasing in Korea. Were viewed data retrospectively to evaluate the epidemiology, clinical features, and outcomes of imported malaria from 1995 to 2007 in a university hospital. All patients diagnosed with imported malaria were included. Imported malaria was defined as a positive smear for malaria that was acquired in a foreign country. A total of 49 patients (mean age, 35.7 year; M: F = 38 : 11)were enrolled. The predominant malarial species was Plasmodium falciparum (73.5%), and the most frequent area of acquisition was Africa (55.1%), followed by Southeast Asia (22.4%) and South Asia (18.4%). Fourteen-patients (30.6%) suffered from severe malaria caused by P. falciparum and 1 patient (2.0%) died of multiorgan failure. Most of the patients were treated with mefloquine (79.2%) or quinine (10.2%); other antimalarial agents had to be given in 13.2% treated with mefloquine and 44.4% with quinine due to adverse drug events (ADEs). P. falciparum was the most common cause of imported malaria, with the majority of cases acquired from Africa, and a significant number of patients had severe malaria. Alternative antimalarial agents with lower rates of ADEs might be considered for effective treatment instead of mefloquine and quinine.

• Korean Journal of Head & Neck Oncology
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• v.22 no.1
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• pp.23-28
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• 2006

Background and Objectives: Maxillectomy is the mainstay of treatment for malignant tumors of the maxillary sinus(MS). Nevertheless, few have been reported on the surgical outcomes of maxillectomy for malignant tumors of MS in Korean literature. Based on our clinical experience, the authors aimed to present the treatment outcomes of maxillectomy for squamous cell carcinomas(SCC) of MS. Subjects and Methods: We reviewed the medical records of 26 cases of maxillectomies with see of MS, who were treated from 1995 to 2004 at Samsung Medical Center. Most patients(73.1%) were locally advanced stage(T3 or T4a) at initial presentation. Total maxillectomy was performed in 18 cases, which is the most frequent procedure(69.2%). We analyzed the treatment outcomes of see of MS and several variables includeing tumor stage and resection margin to identify predictors for treatment failure after maxillectomy. Follow-up duration ranged from 7 to 89 months with a mean of 33 months. Results: Treatment failure occurred in 7 cases(26.9%), among which 3 were salvaged. Three of 26 maxillectomies(11.5%) showed the positive or close(less than 5mm) resection margin in their posterior resection sites; however it did not coincide with the site of recurrence after radiation therapy. Among patients who had been followed up for more than 6 months, disease-free 3 year survival rate was 100.0% in T1 and T2, 76.2% in T3, 60% in T4a, and 69.6% in total. Conclusion: Even though most of see of MS were detected at locally advanced stage, maxillectomy with or without postoperative radiation therapy for resectable MS see(T1-T4a) provided the acceptable treatment outcome(70%, 3Y disease-free survival rate).

• Korean Journal of Head & Neck Oncology
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• v.23 no.1
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• pp.26-31
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• 2007

Background and Objectives：Microvascular free flap reconstruction has been revolutionized in last two decades, and became a standard option in the reconstruction of head and neck defects. We intended to review our experiences of 51 microvascular free flap for head and neck defects during 5-year period and to analyze the types of flaps according to primary sites, success and complication rates. Subjects and Methods：From Oct. 2001 through Dec. 2005, fifty one free flap reconstructions were performed in forty nine patients at ENT department of Soonchunhyang university bucheon hospital. Primary sites, pathology, T-stage, operative time, time interval of oral feeding, and various reconstructive factors such as recipient and donor vessels, free flap related complications, failure rates and salvage rates were retrospectively analyzed. The relation between complication rates and preoperative risk factors were statistically analyzed. Results：Methods of reconstruction were radial forearm free flap(RFFF)(n=28, 54.9%), anterolateral thigh free flaps(n=9, ALTFF)(17.6%), rectus abdominis free flap(n=7, RAFF)(13.7%), jejunal free flap(n=5, JFF)(9.8%), and miscellanous(n=2, 4.0%) in order. In free flap related complications, failure of free flap occurred in seven cases(13.7%) and pharyngocutaneous fistula occurred in five cases(9.8%) among fifty one free flaps. The overall success rate of free flaps was 86.3%. Salvage of free flaps was possible only one among eight cases(12.5%). In positive preoperative risk factor groups, failure of free flap was higher than in negative risk factor group. However, it was not statistically significant. Conclusion：We confirmed that free flap reconstructions are highly versatile and reliable options for use in the reconstruction of various soft tissue defects of the head and neck. Free flaps have gained great popularity given its versatility, ability for a two-team approach, and minimal donor site morbidity. However, complications related to microvascular surgery may be overcome by increased surgical experience and by intensive flap monitoring in early postoperative period.

• Journal of The Korean Association of Information Education
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• v.21 no.4
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• pp.451-462
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• 2017

This study selected 3D printing that is highly likely to be adopted in schools. This research was conducted in two stages: 1) proposing the learning activity framework for utilizing 3D printing in education, and 2) exploring the potential of integrating 3D printing in the school field. The '3D printing learning activity framework' proposed in this study includes four phases that are categorized according to the complexity of problem-solving processes and collaborative interaction: Step 1 as production through replication, Phase 2 as means of imaginary expression, Phase 3 as near problem-solving, and Phase 4 as expanded problem-solving. Next, we conducted the field study with 23 students in the 6th grade math class where they learned the various solid shapes and volumes through 3D printing-integrated activities. The lesson was considered as Phase 1, which is the production through replication. Overall, the results showed that the participants had positive perceptions about the efficacy of 3D printing activities, the quality of learning experience, and satisfaction. On the other hand, it was found that the usability of 3D printers and CAD program needs further improvement The contribution of this study can be found in the learning activity framework that can guide 3D printing activity design in school, and in the exploration of enhancing the connection between 3D printing activities and curricular relevance beyond simple interest toward a novel technology.

• Journal of The Korean Association For Science Education
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• v.20 no.1
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• pp.12-19
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• 2000

The relationships among students' perceptions of computerized science learning environments, computer-related attitudes. and computer experiences were investigated with a sample of 164 9thgraders (80 boys and 84 girls) from two middle schools. The Computerized Science Learning Environment Inventory (CSLEI) and the Computer-Related Attitudes Scale (CRAS) were administered, and students' computer experiences were examined. Students' perceptions of preferred learning environments were also studied with the preferred form of the CSLEI, and compared with those of actual learning environments. Gender differences in the perceptions of computerized science learning environments, computer-related attitudes, and computer experiences were also studied. Students' perceptions of preferred learning environments were significantly better than those of actual learning environments in all subscales of the CSLEI except gender equity. There was no gender difference in the perceptions of computerized science learning environments. However, boys were found to have more positive computer-related attitudes and more computer experiences than girls. Students' perceptions of computerized science learning environments were significantly correlated with computer-related attitudes in resource adequacy subscale, but not with computer experiences. Significant relationships between computer-related attitudes and computer experiences were also found.