• Journal of Electrical Engineering and Technology
• /
• v.12 no.2
• /
• pp.890-903
• /
• 2017

The problem of determining a smooth and collision-free path with maximum possible speed for a Mobile Robot (MR) which is chasing a moving target in a dynamic environment is addressed in this paper. Genetic Network Programming with Reinforcement Learning (GNP-RL) has several important features over other evolutionary algorithms such as it combines offline and online learning on the one hand, and it combines diversified and intensified search on the other hand, but it was used in solving the problem of MR navigation in static environment only. This paper presents GNP-RL based on predicting collision positions as a first attempt to apply it for MR navigation in dynamic environment. The combination between features of the proposed collision prediction and that of GNP-RL provides safe navigation (effective obstacle avoidance) in dynamic environment, smooth movement, and reducing the obstacle avoidance latency time. Simulation in dynamic environment is used to evaluate the performance of collision prediction based GNP-RL compared with that of two state-of-the art navigation approaches, namely, Q-Learning (QL) and Artificial Potential Field (APF). The simulation results show that the proposed GNP-RL outperforms both QL and APF in terms of smooth movement and safer navigation. In addition, it outperforms APF in terms of preserving maximum possible speed during obstacle avoidance.

• Journal of the Korea Convergence Society
• /
• v.8 no.12
• /
• pp.391-395
• /
• 2017

In this research, we conducted a questionnaire survey of contents necessary for eyeglass dispensing & fitting fee and characterization solution of eyeglass dispensing & fitting fee. From August 1, 2016 to September 30, questionnaires were set up for 202 spectators of Seoul and Gyeonggi area, questionnaire survey was conducted online and offline. Statistical processing of all data was performed using Origin Pro 8.5. 92.1% (186 people) and 93.1% (188 people) were positively evaluating the necessity of introduction for the necessity of introducing eyeglass dispensing & fitting fee, respectively. The result suggested that it is necessary to establish the position of the optician as a medical service expert by providing a more stable policy through analysis of overseas cases of eyeglass dispensing & fitting fee.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.39 no.6
• /
• pp.924-937
• /
• 2015

This study surveyed the recognition and credibility of infant's organic cotton apparel and examined the current quality of children's organic cotton clothes available in the market. This study contributes to improve fabric certification programs and safety standards by understanding customer opinions and actual quality. A customer survey revealed that customers believe that organic cotton products should not include chemicals such as pesticides, fluorescent whitening agents and chemical colors; in addition, customers have high expectations for safety as well as worries about the products' validity. Children's underwear was the most purchased item category among organic cotton products. Current organic cotton certification programs are voluntary with multiple organizations that provide various certification standards. A total of 34.2% of children's organic cotton clothes sold at online and offline stores were not certified, and 10.5% had invalid certification information. This may substantially lower the credibility of organic cotton products and requires immediate change. Examination of organic cotton products showed that products do not meet customer expectations for quality and safety: 3 out of 8 products used accessories (buttons and wappens) that include harmful chemicals such as lead, phthalate and formaldehyde, 6 products used fluorescent whitening agents, and 4 products used other fabrics such as rayon, polyurethane and polyester. GOTS mark is the most recognized organic certification, but it still allows the usage of fluorescent whitening agents, which indicates a gap between customer opinions and actual certification standards. Managing national-level mandatory certification programs like food and setting quality standards that meets customer expectations are required to enhance the credibility of organic cotton products.

• The Journal of the Korea Contents Association
• /
• v.11 no.1
• /
• pp.469-478
• /
• 2011

The purpose of this study was to investigate the effects of learning style on blended learning. Subjects were 102 college students(grade 1, department of physical therapy) who enrolled in 'neuroanatomy' course. Blended learning was composed of 13 weeks-3 hour/1week in offline and 16 chapters-24 lessons in online. According to Kolb's learning style, assimilator was the most common. There were no significant differences between the learning style but, they were most preferred blended learning(92.1% of subjects), improved participation and excitation in learning(each 55.5%, 58.8% of subjects), and blended learning was helpful in learning(85.1% of subjects). In student's satisfaction, there was significant difference between the learning style. Statistical difference was found in satisfaction between assimilator(80.7%) and accommodator(67.5%).

• Women's Health Nursing
• /
• v.22 no.1
• /
• pp.1-10
• /
• 2016

Purpose: This study was conducted to identify the pattern and factors associated with women's use of complementary and alternative medicine (CAM) during postpartum in Korea. Methods: With a descriptive survey design, data of 423 postpartum women were collected via online and offline surveys. Results: A total of 251 women (59.3%) reported CAM use during postpartum. Eating animal-based foods (65.3%), plant-based health foods (52.2%), and using oriental medicine (31.8%) were commonly used in postpartum women. The reason for using CAM were physical recovery (39.1%), breastfeeding (29.7%), weight loss (24.8%), prevention of postpartum complications (5.1%), and others (1.3%). People who recommended CAM use was mainly family (41.3%), and expense of using CAM was 751,188 Korea won. Most women discussed CAM use with doctor (44.9%), and 29.3% of women didn't even consult CAM use with health care providers. Most of (72.3%) women were satisfied with CAM use. Higher level of education and monthly income, being employed, primipara, normal range of gestational weight gain, no abortion experience, and no maternal complication were significantly associated with CAM use in postpartum women. Conclusion: Results of this study were somewhat different from those of western research. Findings offer baseline data of CAM use in postpartum women, and health care providers need to understand it when they care for them.

• Fashion & Textile Research Journal
• /
• v.17 no.1
• /
• pp.116-126
• /
• 2015

This paper compared the properties of cosmetics depending on the shopping tendency of female consumers in Korea and China. The data on Chinese women living in Korea and Korean women in their 20s was collected using an offline survey. The data on Chinese women living in China in their 20s was collected using an online survey. Three hundred twenty-seven questionnaires out of a total of 330 questionnaires were used for statistical analysis. The survey was conducted from January to February 2014. Eighteen questions on shopping tendency and eight questions on the properties of cosmetics were analyzed using a 5-point Likert scale. Data was analyzed by Descriptives, Factor Analysis, Reliability Analysis, ANOVA and Cluster Analysis, and SPSS 21 statistical program. In accordance with the analyses, the shopping tendency comprised a showing-off tendency, pleasure-seeking tendency, and practicality tendency; the properties of cosmetics were classified into conformity and functionality. On the basis of the elements in the shopping tendency, the female consumers were categorized into a low involvement consumer group, high involvement consumer group, and hedonic consumer group. The Chinese women emphasized conformity or functionality of cosmetics more than the Korean women regardless of the countries where they lived. Regardless of shopping types or countries where they lived, the Korean and Chinese women in their 20s emphasized functionality over conformity of cosmetics. Furthermore, Chinese women living in Korea showed a similar shopping tendency to Chinese living in China.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.20 no.12
• /
• pp.780-788
• /
• 2019

This study is intended to analyze flipped classroom learning activities, which have recently been spotlighted as a learner-centered teaching method in universities, from the perspective of cultural and historical activity theory. A survey and some participation observations were conducted with one professor and the students who participated in Educational Methods and Technology courses at A university. The components of the flipped classroom learning activities were analyzed based on the model of the activity system, and contradictions that appeared in the interactions between components were analyzed. Four implications were proposed for a more advanced flipped classroom learning activity system: the professor's and the learners' true identity recognition and role performance, strengthening the organic link between online and offline activities, support for alleviating the burden of teaching and learning preparation, and readjusting the system to support its smooth operation.

• The Journal of the Korea Contents Association
• /
• v.15 no.5
• /
• pp.179-190
• /
• 2015

This study discusses on the influential factors of satisfaction in communication by focusing on the political communication phenomenon that is revealed in our society. The acts of political communication and its communication satisfaction are examined by exploring individuals' political inclination and their media usage which are the main influential factors of political communication. An interview survey was conducted on a thousand adults over the age of nineteen who are residing in sixteen cities and provinces nationwide. As a result, a high rate of online media usage was observed among people with progressive political inclination. It showed that the political communication acts of 'writing/communicating' which indicates ons actively posting their personal opinions, has a positive influence on communication satisfaction. On the other hand, the usage of offline media was dominant over people with conservative and neutral political inclination. A passive act of 'reading/watching,' which is to observe other people's opinions, was shown by most of the interviewees. Therefore, it was able to discuss that in order for a harmonious flow of political communication among our society, the understanding of citizens' political characteristic must be preceded and the differentiated political communication using media must be raised accordingly.

• Journal of Intelligence and Information Systems
• /
• v.14 no.3
• /
• pp.41-57
• /
• 2008

U-Publication, the Tag-Embedded publication, is one of U-Media. U-Media is defined as a media where human creates and consumes content through not only human cognitive and perceptual processes but also through the interactions between surrounding digital systems. U-Media provides information by generating, collecting, and attaching the content itself and the related information based on the interaction of the bio-systems incorporating digital information and devices embedded in humans, and surrounding objects including external digital devices. Using U-Publication, readers consume its content not only in offline but also online through a mobile RFID reader which touches and connects the URLs embedded in the RFID tags attached to it. Readers can consume the additional content though the hyperlinks attached to U-Publication and perform commercial activity as well as consumer the printed content. This paper defines the RFID-Tagged publication, proposes its related business models, and evaluates the alternative business models through a simulation study.

• The Journal of Internal Korean Medicine
• /
• v.42 no.4
• /
• pp.532-546
• /
• 2021

Objective: This study investigated the perception, diagnosis, and treatment of irritable bowel syndrome (IBS) in the general population, in patients, and in Korean medicine doctors (KMDs) in order to provide basic information for the development of Korean medicine clinical practice guidelines for IBS. Methods: A questionnaire was developed in two versions, one for the general population/patients and one for KMDs. The questions were about the general perception, diagnosis, and treatment of IBS. Both online and offline surveys were conducted using these questionnaires. Results: In total, 213 general population/patients and 435 KMDs responded to the survey. The results of the analysis were as follows. Most of the KMDs diagnosed IBS based on clinical aspects. Acupuncture was the most common treatment, followed by prescription herbal medicine, moxibustion, and manufactured herbal medicine. 34.3% of KMDs used clinical practice guidelines for IBS patient treatment. 57.8% of patients were diagnosed with IBS by doctors at primary medical institutions, and 53.1% were diagnosed with colonoscopy. More than half of the IBS patients who have been treated with Korean medicine said they experienced improvement of symptoms and prevention of recurrence, but more than 70% of the respondents said future safety and effectiveness studies of Korean medicine were needed. Conclusions: In spite of the positive perception of IBS treatment with Korean medicine, actual utilization was relatively low. The development and promotion of, as well as education about, appropriate and reasonable Korean medicine practice guidelines for IBS is necessary.