• Journal of the Korean Society for Aviation and Aeronautics
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• v.31 no.4
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• pp.72-81
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• 2023

The use of EFB (Electronic Flight Bag) has expanded, providing convenience to flight crews by minimizing paper usage within aircraft and offering the latest information, operability, and convenience related to aircraft operations. EFBs provide flight-sensitive information such as aircraft performance calculations, airport diagrams, routes, and approach procedures. For these information, EFBs connect to the cyber environment through Wi-Fi or self-contained data communication, allowing access to cloud-based systems for information updates, with administrators uploading the latest information for retrieval. However, in contrast to the evolving aviation technology, there is currently no legislation or security policy in place to maintain the security of EFBs, leaving them exposed to potential cyber threats. Therefore, improvements such as revising relevant laws to address potential cyber threats targeting EFBs and establishing and implementing EFB management systems are necessary. This paper aims to present the necessity for amending laws related to EFB security in response to cyber threats and suggests methods for enhancement.

• Smart Structures and Systems
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• v.32 no.3
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• pp.179-193
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• 2023

This study explores an alternative to the existing centralized process for data anomaly detection in modern Internet of Things (IoT)-based structural health monitoring (SHM) systems. An edge intelligence framework is proposed for the early detection and classification of various data anomalies facilitating quality enhancement of acquired data before transmitting to a central system. State-of-the-art deep neural network pruning techniques are investigated and compared aiming to significantly reduce the network size so that it can run efficiently on resource-constrained edge devices such as wireless smart sensors. Further, depthwise separable convolution (DSC) is invoked, the integration of which with advanced structural pruning methods exhibited superior compression capability. Last but not least, quantization-aware training (QAT) is adopted for faster processing and lower memory and power consumption. The proposed edge intelligence framework will eventually lead to reduced network overload and latency. This will enable intelligent self-adaptation strategies to be employed to timely deal with a faulty sensor, minimizing the wasteful use of power, memory, and other resources in wireless smart sensors, increasing efficiency, and reducing maintenance costs for modern smart SHM systems. This study presents a theoretical foundation for the proposed framework, the validation of which through actual field trials is a scope for future work.

• International Journal of Internet, Broadcasting and Communication
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• v.15 no.4
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• pp.142-148
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• 2023

In Modern days, Self-driving for modern people is an absolute necessity for transportation and many other reasons. Additionally, after the outbreak of COVID-19, driving by oneself is preferred over other means of transportation for the prevention of infection. However, due to the constant exposure to stressful situations and chronic fatigue one experiences from the work or the traffic to and from it, modern drivers often drive under drowsiness which can lead to serious accidents and fatality. To address this problem, we propose a drowsy driving prevention learning model which detects a driver's state of drowsiness. Furthermore, a method to sound a warning message after drowsiness detection is also presented. This is to use MoveNet to quickly and accurately extract the keypoints of the body of the driver and Dense Neural Network(DNN) to train on real-time driving behaviors, which then immediately warns if an abnormal drowsy posture is detected. With this method, we expect reduction in traffic accident and enhancement in overall traffic safety.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.24 no.1
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• pp.175-180
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• 2024

This paper investigates the effect of a deep learning-based system on data labeling task productivity by individuals with developmental disabilities. It was found that interventions, particularly those using AI, significantly improved productivity compared to self-serving task. AI interventions were notably more effective than job coach-led approaches. This research underscores the positive role of AI in enhancing task efficiency for those with developmental disabilities. This study is the first to apply AI technology to the data labeling tasks of individuals with developmental disabilities and highlighting deep learning's potential in vocational training and productivity enhancement for this group.

• Nutrition Research and Practice
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• v.18 no.1
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• pp.62-77
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• 2024

BACKGROUND/OBJECTIVES: Colorectal cancer (CRC) is the third most common cancer worldwide with a high recurrence rate. Oxaliplatin (OXA) resistance is one of the major reasons hindering CRC therapy. β-Carotene (BC) is a provitamin A and is known to have antioxidant and anticancer effects. However, the combined effect of OXA and BC has not been investigated. Therefore, this study investigated the anticancer effects and mechanism of the combination of OXA and BC on CRC. MATERIALS/METHODS: In the present study, the effects of the combination of OXA and BC on cell viability, cell cycle arrest, and cancer stemness were investigated using HCT116, HT29, OXA-resistant cells, and human CRC organoids. RESULTS: The combination of OXA and BC enhanced apoptosis, G₂/M phase cell cycle arrest, and inhibited cancer cell survival in human CRC resistant cells and CRC organoids without toxicity in normal organoids. Cancer stem cell marker expression and self-replicating capacity were suppressed by combined treatment with OXA and BC. Moreover, this combined treatment upregulated apoptosis and the stem cell-related JAK/STAT signaling pathway. CONCLUSIONS: Our results suggest a novel potential role of BC in reducing resistance to OXA, thereby enhances the anticancer effects of OXA. This enhancement is achieved through the regulation of cell cycle, apoptosis, and stemness in CRC.

• Journal of The Korean Association For Science Education
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• v.24 no.3
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• pp.646-658
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• 2004

In this study, the effects of feedback types in self-assessment on the students' science concept understanding and science-related attitudes were investigated. Student's perceptions towards the self-assessment and the feedback provided were also examined. Ten classes from a middle school were chosen. Five of those classes were assigned to the comparative group that any type of feedback was not provided and the other five classes were assigned to the experimental group which feedback was provided. The experimental group was further divided into three groups for implement of three types of feedback. Experimental group A was given feedback in the form of written comments and experimental group B was provided feedback through correct-wrong response to the students answer. Experimental group C was provided oral feedback to the whole class. The tests of science-related attitudes were administered before and after the instruction period. The science concepts understanding test was done only after the instruction. There were significant differences between the experimental group and comparative group in understanding of scientific concepts. The enhancement of science-related attitudes was also significantly higher for the experimental group. There were significant differences between the experimental groups in science-related attitudes. However, there were no significant differences in understanding of scientific concepts in relation to the types of feedback in experiment groups. Interviews with the students of the experimental groups showed that students had positive attitudes towards self-assessment and the types of feedback. And they regarded self-assessment and feedback as helping them understand the science concepts. In conclusion, it was acknowledged that providing feedback in self-assessment showed considerably positive influences on the improvement of the understanding of scientific concepts and science-related attitudes.

• Journal of dental hygiene science
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• v.13 no.2
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• pp.142-150
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• 2013

The aim of this study was to analyze the factors related to self-reported halitosis. This study performed a questionnaire survey, targeting at 450 adults who lived in Seoul and Gyeonggi area. Main results of this study were as followings. Relationships between socio-demographic characteristics and halitosis showed no significant difference. Relationships between subjective oral health and halitosis, the groups that were treated dental prosthesis, aware of periodontal disease and dry mouth symptoms reported more halitosis (p<0.05). The group that brushed teeth less than twice a day, did not brush teeth after having a snack, and had frequent sweet treat reported more halitosis (p<0.05). The group that more experienced limitation, discomfort, discomfort reported more halitosis (p<0.05). Based on the results derived as above, the self-reported halitosis was shown to be related to periodontal disease, dry mouth, oral hygiene care and quality of life. Therefore, it is considered that preventing periodontal disease and oral dryness as well as reinforcing the oral hygiene care will contribute to prevention of halitosis and enhancement of quality of life.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.5
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• pp.221-228
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• 2016

This study was intended to investigate predictability among variables having an effect on problem solving skill and achievement in collaborative learning by utilizing SNS at university. To this end, 61 first-year students majoring in early childhood education at I community university in the national capital region were surveyed. And on the basis of the collected data, a multiple regression analysis was carried out. The results of carrying out the analysis are as follows. First, it was shown that self-efficacy, peer learning and help seeking had a significant effect on problem solving skill, and explained 70 of variability in problem solving skill. Second, it was shown that peek learning, help seeking and problem solving skill significantly predicted achievement, and explained 72% of the variability in achievement. Third, problem solving skill partially mediated the relationship between self-efficacy and achievement. The above-mentioned results imply that learning motivation should be increased so that learners have self-efficacy in order to improve college students' academic achievement in collaborative learning by utilizing SNS at university, and a class environment making it possible to actively provide peer learning and help seeking should be designed and a specific scheme enabling the enhancement of the problem solving skill should be considered.

• Child Health Nursing Research
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• v.7 no.3
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• pp.342-358
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• 2001

The purpose of the study is both to develope the group counseling program applying Reality Therapy, by which positive body image could be conceived by adolescent women, by helping them identify their bodies as what they are, and then admit their real bodies, and also find out some practical methodologies of self-esteem, and to verify the program to show how effectively this program can be applied to them. Data were collected by self-reported questionnaires(body image and depression) from 59 high school girls in Seoul who were selected by criteria of this study, from the 1st of September to 10th of November, 2000. The experimental group participated in the group counseling by applying Reality Therapy with 8 sessions for 4 weeks. Descriptive statistics, homogeneity test, hypothesis testing, reliability were performed statistically by utilizing SAS pc program, and additionally the reaction due to the change of body image by adolescent women was also analyzed. The results drawn through the present study are as follows: 1. A hypothesis that 'adolescent women who participated in the group counseling program by applying Reality Therapy may get higher points on body image than adolescent women who did not participated' has been adopted (t=6.73, p=.000). 2. A hypothesis that 'adolescent women who participated in the group counseling program by applying Reality Therapy may get lower points on depression than adolescent women who did not participated' has been adopted (t=5.28, p=.000). 3. After applying the group counseling program, the degree of depression for upper group who obtained higher preliminary points on depression has decreased rather meaningfully more than that for lower group who obtained higher preliminary points(t=5.58, p=.000). 4. Reactions associated with positive change in body image of adolescent women who participated in the group counseling program by applying Reality Therapy has been shown to be body acceptance, enhancement of self-esteem, and change of value judgment of beauty. 5. The difference in the motivation and attitude of each group has been observed, by analyzing the reactions obtained from those who show the highest change of body image and those who show the lowest change of body image through the group counseling program by applying Reality Therapy. According to the present studies, it can be concluded that the group counseling program by applying Reality Therapy has turned out as an effective strategy for nursing intervention for adolescent women, by helping them form positive body images and reducing depression.

• Journal of The Korean Association For Science Education
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• v.39 no.1
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• pp.115-128
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• 2019

The purpose of this study is to analyze the relationship between mentor teachers' mentoring characteristics and mentee teachers' reflective practices and to investigate mentor teachers' mentoring methods to enhance mentee teachers' reflective practices based on the analysis. The participants were four beginning science teachers and four mentors who have more than seven years of teaching experience. This study compiled mentor and mentee teachers' journals, records and transcripts from mentee teachers' five periods of classes, lesson plans, evaluation forms of lessons, one-on-one mentoring records and transcripts, questionnaires conducted before, during, and after the mentoring program, and a questionnaire about the effects of one-on-one mentoring. The mentoring characteristics of mentor teachers were analyzed based on mentor's interaction methods and the contents and frequency of the support based on teaching feedback. Mentee teachers' reflective thinking was analyzed by being categorized as voluntary self-reflections of their classes and reflections on the support provided by mentor teachers. Mentee teachers' reflective practices were analyzed by utilizing RTOP. The conclusions of this study are as follows: Mentor teachers could promote mentee teachers' reflective practices by eliciting conversation that helped mentees perceive problems in their teaching practices. Mentors' questions evoking mentees' reflective thinking could elicit mentees' spontaneous self-reflection, and it led to the enhancement of self-reflection on mentors' support and reflective practices. When mentors offered the support based on teaching practices while playing a role as a facilitator to help mentees identify and solve problems by themselves, mentees' reflective practices could be promoted.