• Korean Journal of Social Welfare
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• v.59 no.3
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• pp.201-227
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• 2007

This study is to investigate determinants of social workers' career commitment, compare the level of career commitment of social workeks by social work organization, and analyze the effects of career commitment on job attitudes. Social workers working for government agencies and community welfare centers and institutions in Busan city and Gyeongnam province were surveyed using structured questionnaires and 326 usable questionnaires were obtained. The questionnaires were analyzed for job, career, role, and organizational justice characteristics models and comprehensive model using SPSS/PC+.. The results are as follows; the level of social worker's career commitment was relatively high but the level of career commitment of social workers working for government agencies was slightly lower than that of social workers working for private agencies. According to the demographic characteristics, the level of career commitment of males was higher than that of famales. That of older workers was higher than that of younger worker, that of 2nd rank workers was higher than that of 1st rank workers. Task significance, task identity, feedback for the job done, career satisfaction, low role conflict, high distributive justice and interactive justice were related to higher level of career commitment while the skill variety was related to the lower level of career commitment. However, the main determinants differ according to the social work organization. Career commitment affected negatively on the career turnover intention while it affected positively on organizational commitment, organizational citizenship behavior, job involvement, and intrinsic job satisfaction. Therefore, different approaches and systematic measures are needed according to the organization.

• Journal of the Korean Society of Radiology
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• v.10 no.5
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• pp.321-325
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• 2016

Dose creep is one of clinical errors that arises from the tester's inexperience or carelessness, and according to Task Group #116 of American Association of Physicists in Medicine, its continued occurrence is being reported in the digital method. At this point, the demand for an automatic exposure control device that minimizes the dose creep phenomenon and can improve reproducibility is increasing. In this study is to consider the automatic exposure control device sensor that can is not only easy to produce, but also reduce the dose creep phenomenon by conducting a research on high-efficient semiconductor sensor. As a result, the Intrinsic-type and PIN-type sensors have excellent optical property compared to Ref sensor, would have less shading effect, and have relatively low sensitivity, but would provide accurate feedback signals to automatic exposure control device with its consistent tendency according to exposure condition changes.

• Journal of Biomedical Engineering Research
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• v.45 no.1
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• pp.10-19
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• 2024

The purpose of this study is to conduct a summative evaluation of the usability of a general-purpose ventilator to determine whether it can be used for its intended purpose in the intended environment by the intended user and to find possible errors in use. The importance of ventilators has increased due to the accelerated aging of the population and the impact of the pandemic. In addition, patients who require ventilators are often in critical condition, so even a small error in use can be fatal. Therefore, it is important to ensure that the ventilator has sufficient stability and can be used satisfactorily without inconvenience to the user. In this study, we conducted a usability test with 17 respiratory nurses with more than 3 years of experience using the ventilator. We analyzed the task success rate, satisfaction, and opinions of the intended users while going through a total of 17 scenarios. Satisfaction was captured through an ASQ questionnaire and subjective opinions were captured through a detailed opinion questionnaire. The results showed a high level of satisfaction with an average score of 6.3 for the use scenarios. Evaluators expressed satisfaction with the overall visibility and versatility of the features, but noted that improvements were needed for calibration tasks with low task success rates. As the calibration method is different from other equipment, it was suggested that specific explanations of the calibration method and the picture that appears when calibrating are needed, and that if relevant training is provided, the equipment can be used without problems. If the usability evaluation is not limited to securing efficiency and satisfaction from the intended users, but also continuously receives feedback from users to prepare for use in emergency environments such as pandemic situations, it will be very helpful to seize opportunities such as emergency authorization in future situations, and ultimately contribute to patient safety by reducing use errors.

• Journal of the HCI Society of Korea
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• v.2 no.2
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• pp.53-59
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• 2007

Several researches in 3D interaction have identified and extensively studied the four basic interaction tasks for 3D/VE applications, namely, navigation, selection, manipulation and system control. These interaction schemes in the real world or VE are generally suitable for interacting with small graspable objects. In some applications, it is important to duplicate real world behavior. For example, a training system for a manual assembly task and usability verification system benefits from a realistic system for object grasping and manipulation. However, it is not appropriate to instantly apply these interaction technologies to such applications, because the quality of simulated grasping and manipulation has been limited. Therefore, we introduce the intuitive and natural 3D interaction haptic interface supporting high-precision hand operations and realistic haptic feedback.

• Journal of Korean Home Economics Education Association
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• v.30 no.2
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• pp.117-136
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• 2018

The purpose of this study is restructuring the template to apply the 'Backward design' for Home Economics Instruction. This study reviewed the theory of Wiggins and McTighe, the advocates of backward design, and examined the template for version 2.0 of Wiggins and McTighe (2011). In addition, This study analyzed various previous researches using backward design, and drew implications for template restructuring for applying backward design on Home Economics Instruction. In addition, the validity of the template was verified through facial validity through the expert council. Through this process, the final 5 stages (1. Curriculum Analysis → 2. Instructional Design (Learning Experience Design ↔ Evaluation Design (Performance Task Planning) → 3. Instruction Flow → 4. Class guide for each class → 5. Evaluation record, and feedback)suggested templates for applying backward design. Future research will use the restructured assumptions and templates to develop teaching materials in the Home Economics areas of the 2015 revised curriculum. In future research, field research should be carried out on how the Home Economics instruction with backward design affects learners.

• The Mathematical Education
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• v.56 no.3
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• pp.281-300
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• 2017

This study analyzed the difficulties of middle school students in computer simulation of the law of large numbers through eye movement analysis. Some students did not attend to the simulation results and could not make meaningful inferences. It is observed that students keep the existing concept even though they observe the simulation results which are inconsistent with the misconceptions they have. Since probabilistic intuition influence student's thinking very strongly, it is necessary to design a task that allows students to clearly recognize the difference between their erroneous intuitions and simulation results. In addition, we could confirm through eye movements analysis that students could not make meaningful observations and inferences if too much reasoning was needed even though the simulation included a rich context. It is necessary to use visual representations such as graphs to provide immediate feedback to students, to encourage students to attend to the results in a certain intentional way to discover the underlying mathematical structure rather than simply presenting experimental data. Some students focused their attention on the visually salient feature of the experimental results and have made incorrect conclusion. The simulation should be designed so that the patterns of the experimental results that the student must discover are not visually distorted and allow the students to perform a sufficient number of simulations. Based on the results of this study, we suggested that cumulative relative frequency graph showing multiple results at the same time, and the term 'generally tends to get closer' should be used in learning of the law of large numbers. In addition, it was confirmed that eye-tracking method is a useful tool for analyzing interaction in technology-based probabilistic learning.

• The Mathematical Education
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• v.56 no.2
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• pp.161-175
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• 2017

The purpose of this study is to compare and analyze the impact on low-achievers in mathematics who studied mathematics using Blended e-learning and Personalized system of instruction after school. Blended e-learning is defined as the management of e-learning using the e-study run by the education office in local. Personalized system of instruction was proceeded as follows; (1) all students are given a syllabicated learning task and a study guide, (2) students study the material autonomously according to their own pace for a certain period of time, (3) the teacher strengthens the students' motivation through grading and feedback after students study a subject and solve the evaluation problem. The learning materials for Personalized system of instruction are re-edited the offline education contents provided by the blended e-learning to the level of students. The 118 $7^{th}$ grade students from the D middle school participated in this study. The results were verified by achievement tests before and after the study, as well as survey regarding their attitude toward mathematics. The results are as follows. First, Blended e-learning has more positive impacts than Personalized system of instruction in mathematics achievement. Second, there was no difference in mathematics achievement according to their self-directed learning between Blended e-learning and Personalized system of instruction. Third, both types utilizing Blended e-learning and Personalized system of instruction have positive effect on attitude toward mathematics, and there is not their difference between two methods of teaching and learning mathematics.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.8
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• pp.1483-1490
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• 2009

This parer is presented multiple path-planning of unmanned autonomous forklift using modified genetic algorithm and fuzzy inference system. There are a task-level feedback method and a method that path is dynamically replaned in realtime while the autonomous vehicles are moving by means of an optimal algorithm for existing multiple path-planning. However, such methods cause malfunctions and inefficiency in the sense of time and energy, and path-planning should be dynamically replanned in realtime. To solve these problems, we propose multiple path-planning using modified genetic algorithm and fuzzy inference system and show the performance with autonomous vehicles. For experiment, we designed and built two autonomous mobile vehicles that equipped with the same driving control part used in actual autonomous forklift, and test the proposed multiple path-planning algorithm. Experimental result that actual autonomous mobile vehicle, we verified that fast optimized path-planning and efficient collision avoidance are possible.

• The Journal of the Korea Contents Association
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• v.11 no.12
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• pp.753-763
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• 2011

The goal of this study is to analyze the problem and performance of life sympathy policy and to present development plan. For this, literature, and empirical research were performed. The analysis showed the problem of life sympathy policy in the following manner. That is the confusion of the mix of department, the lack of publicity, the uncertain of persistence and the lack identity of the monitor, the absence a unified operating instructions on the monitor, the insufficient to activities and operations housewife monitors etc. To vitalize life sympathy policy and operational needs of aspects of the institutional and the activation. First, The task of activation of the institutional challenge is to modify the related law, strengthen the organization, strengthen the personnel, expand the scope of participation monitors. The improvement of the operational aspects of the policy include strengthening integration and connectivity, the construction of policy promotion environment that reinforce feedback and outcome of life sympathy policy, And the energization of on-line activities needs the reinforcement of the operating system, etc. Through the activation of the sector policy, the application of the idea of housewives, and the participation of government policies will be a lot of contribution to the development of South Korea in the 21st century.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.2
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• pp.517-524
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• 2010

Recently, the size of online texts and textual information is increasing explosively, and the automated classification has a great potential for handling data such as news materials and images. Text classification system is based on supervised learning which needs laborous work by human expert. The main goal of this paper is to reduce the manual intervention, required for the task. The other goal is to increase accuracy to be high. Most of the documents have high complexity in contents and the high similarities in their described style. So, the classification results are not satisfactory. This paper shows the implementation of classification system based on ETOM+RPost algorithm and classification progress using SPAM data. In experiments, we verified our system with right-training documents and wrong-training documents. The experimental results show that our system has high accuracy and stability in all situation as 16% improvement in accuracy.