• Communications of Mathematical Education
• /
• v.37 no.1
• /
• pp.1-19
• /
• 2023

Mathematics Listening Ability(MLA) refers to the ability to listen to and grasp the meaning of speech language containing mathematical concepts and principles, distinguishing it from daily life and listening in other subject classes. According to literature, MLA might be divided into six types. Among them, interpretation, discovering, evaluating, and evaluation may indicate an attitude that correctly listens to the meaning of the language used in mathematics classes. On the other hand, selective, pretend, and ignore are types of listening attitudes that are not appropriate. Based on the statistical analysis of 834 3rd to 6th graders and a total of 44 homeroom teachers I developed a MLA survey items for elementary school students. In this study, principal component analysis was conducted to verify reliability in the development of survey items, and expert review and correlation analysis of survey results were conducted to verify validity. In addition, the validity was verified by statistically analyzing the survey results of students and their homeroom teachers. Based on literature and statistical analysis, I developed a MLA Survey items(for students) consisting of 25 questions and a mathematical resolution measurement tool(for teachers) consisting of 26 questions.

• Journal of Korea Entertainment Industry Association
• /
• v.13 no.7
• /
• pp.497-503
• /
• 2019

The purpose of this study was to investigate the effect of self care training program on motor function of upper limb and self-efficacy in chronic stroke patients. This study selected 20 chronic stroke patients in local community men. The subjects carried out self care training program be composed of task oriented training for 40 minutes, 4 times per week for 6 weeks. Manual function test(MFT), digital grip dynamometer, self-efficacy scale were used to evaluate motor function of upper limb and self-efficacy during pre and post intervention. In MFT and hand grip force test, the post outcome were significantly increase than the pre outcome(p<.05). In self-efficacy evaluation, the post outcome of was significantly improve than the pre outcome(p<.05). The result of this study show that the self care training program be composed of task oriented training may be appropriate for improving the motor function of upper limb and self-efficacy in chronic stroke patients. This will enable the application of self care training program in rehabilitation therapy of chronic stroke patients and it will help guide the selection of the therapist as one therapeutic basis

• Journal of Naturopathy
• /
• v.7 no.1
• /
• pp.20-25
• /
• 2018

The purpose of this study was investigated to observe the relatively low amino acid mutations in six different strains of ATCC or KCTC Salmonella strains (four species and two isolates). The mutations in the strains were to be detected and compared with the genes csgA and csgB corresponding to the Thin aggregative fimbriae. Amino acid mutations in the strains were observed from Ser20→ Gly(AGT→GGT) in the csgA gene, Asp25→Ala(GAT→GCT) and Lys66→Thr(AAA→ACA) in the csgB gene. Among the six strains, the two most common amino acid variations were observed in S. typhimurium - TH strains. On the other hand, no mutation of nucleotide sequence was observed in the strains of S. typhimurium ATCC 13311 and S. typhimurium KCTC 1925. In conclusion the genes csgA and csgB in the strains may be useful for the evaluation and detection of amino acid mutation.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
• /
• v.36 no.4
• /
• pp.122-144
• /
• 2023

Objectives : The purpose of this study is to evaluate the effects of herbal medicine treatment in patients with cold urticaria. Methods : We searched randomized controlled trials(RCTs) reporting the effects of herbal medicine for cold urticaria through domestic and international databases from their inception to September 2023. The results were summarized in tables. We assessed the risk of bias in included RCTs through Cochrane risk of bias tool and the data synthesis was conducted through RevMan version 5.4. Results : A total of 12 RCTs were included in this review and all trials compared herbal medicine alone treatment(treatment group) with western medicine alone treatment(control group). The total effective rate(TER) of treatment group was statistically higher than that of control group(RR: 1.49, 95% CI: 1.38 to 1.62, p<0.00001, I²=65%). On the other hand, when comparing except for 1 trial with different evaluation period, the TER of treatment group was statistically higher than that of control group and heterogeneity was very low(RR: 1.36, 95% CI: 1.26 to 1.47, p<0.00001, I²=0%). And when comparing 8 trials using the total symptom score(TSS) change index as an indicator of TER, the TER of treatment group was statistically higher than that of control group and heterogeneity was very low(RR: 1.38, 95% CI: 1.26 to 1.51, p<0.00001, I²=0%). The treatment group showed more statistically significant decrease compared to the control group in TSS(MD: -2.51, 95% CI: -2.63 to -2.40, p<0.00001, I²=99%). The relapse rate of treatment group was statistically lower than that of control group(RR: 0.19, 95% CI: 0.10 to 0.40, p<0.00001, I²=0%). Mild adverse events such as sleepiness, dizziness were reported in control group and gastric discomfort was reported in treatment group. In the risk of bias assessment, many cases were evaluated as 'Unclear risk'. Conclusions : This review found that herbal medicine alone treatment could more effective and safe than western medicine alone treatment for cold urticaria. But further well-designed researches are needed because of heterogeneity between trials and the quality of the included trials.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
• /
• v.16 no.5
• /
• pp.354-361
• /
• 2023

Big data analysis systems apply NoSQL databases like MongoDB to store, process, and analyze diverse forms of large-scale data. MongoDB offers scalability and fast data processing speeds through distributed processing and data replication, depending on its configuration. This paper investigates the suitable MongoDB environment configurations for implementing big data analysis systems. For performance evaluation, we configured both single-node and multi-node environments. In the multi-node setup, we expanded the number of data nodes from two to three and measured the performance in each environment. According to the analysis, the processing speeds for complex data structures with three or more dimensions are approximately 5.75% faster in the single-node environment compared to an environment with two data nodes. However, a setting with three data nodes processes data about 25.15% faster than the single-node environment. On the other hand, for simple one-dimensional data structures, the multi-node environment processes data approximately 28.63% faster than the single-node environment. Further research is needed to practically validate these findings with diverse data structures and large volumes of data.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.27 no.6
• /
• pp.182-192
• /
• 2023

In this study, the efficacy of Engineered Cementitious Composite(ECC) jacket for masonry fences subjected to lateral dynamic load was experimentally verified through a shaking table test, comparing it with the performance of an unreinforced masonry(URM) fence. Firstly, dominant frequencies, modal damping ratios and deformed shapes were identified through an impact hammer test. URM and ECC-strengthened fences with heights of 940mm and 970mm had natural frequencies of 6.4 and 35.3Hz, and first modal damping ratios of 7.0 and 5.3%, respectively. Secondly, a shaking table test was conducted in the out-of-plane direction, applying a historical earthquake, El Centro(1940) scaled from 25 to 300%. For the URM fence, flexural cracking occurred at the interface of brick and mortar joint(i.e., bed joint) at the ground motion scaled to 50%, and out-of-plane overturning failure followed during the subsequent test conducted at the ground motion scaled to 30%. On the other hand, the ECC-jacketed fence showed a robust performance without any crack or damage until the ground motion scaled to 300%. Finally, the base shear forces exerted upon the URM and ECC-jacketed fences by the ground motions scaled to 25~300% were evaluated and compared with the ones calculated according to the design code. In contrast to the collapse risk of the URM fence at the ground motion of 1,000-year return period, the ECC-jacketed fence was estimated to remain safe up to the 4,800-year return period ground motion.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.27 no.6
• /
• pp.55-61
• /
• 2023

In this study, a basic research was conducted to establish a maintenance plan considering the environmental factors and deterioration characteristics of port facilities. The precise safety diagnosis reports for Incheon and Busan port facilities were referenced to examine the extent of deterioration and damage. The relationship with the degradation environmental assessment presented in the current guidelines was also analyzed. The analysis of the damage level of Incheon and Busan port facilities revealed that Incheon Port exhibited approximately three times higher damage rate compared to Busan Port. In the case of Incheon Port, reinforcement corrosion and external damage showed similar proportions, while in Busan Port, reinforcement corrosion had a higher proportion compared to external damage. On the other hand, when comparing with the degradation environmental assessment presented in the guidelines, it was found that there were some limitations in performing quantitative evaluation based on the guidelines for assessing port facilities. Therefore, an analysis based on tidal range was conducted by referring to existing literature. The analysis of tidal range in Incheon and Busan regions showed that Incheon had approximately five times higher difference compared to Busan. It is considered that this can be utilized as a differentiated item from existing degradation environmental assessment criteria.

• Health Policy and Management
• /
• v.33 no.4
• /
• pp.450-456
• /
• 2023

Background: This study aims to develop a "Predictive Model for the Possibility of Collection Delinquent Health Insurance Contributions" for the National Health Insurance Service to enhance administrative efficiency in protecting and collecting contributions from livelihood-type defaulters. Additionally, it aims to establish customized collection management strategies based on individuals' ability to pay health insurance contributions. Methods: Firstly, to develop the "Predictive Model for the Possibility of Collection Delinquent Health Insurance Contributions," a series of processes including (1) analysis of defaulter characteristics, (2) model estimation and performance evaluation, and (3) model derivation will be conducted. Secondly, using the predictions from the model, individuals will be categorized into four types based on their payment ability and livelihood status, and collection strategies will be provided for each type. Results: Firstly, the regression equation of the prediction model is as follows: phat = exp (0.4729 + 0.0392 × gender + 0.00894 × age + 0.000563 × total income - 0.2849 × low-income type enrollee - 0.2271 × delinquency frequency + 0.9714 × delinquency action + 0.0851 × reduction) / [1 + exp (0.4729 + 0.0392 × gender + 0.00894 × age + 0.000563 × total income - 0.2849 × low-income type enrollee - 0.2271 × delinquency frequency + 0.9714 × delinquency action + 0.0851 × reduction)]. The prediction performance is an accuracy of 86.0%, sensitivity of 87.0%, and specificity of 84.8%. Secondly, individuals were categorized into four types based on livelihood status and payment ability. Particularly, the "support needed group," which comprises those with low payment ability and low-income type enrollee, suggests enhancing contribution relief and support policies. On the other hand, the "high-risk group," which comprises those without livelihood type and low payment ability, suggests implementing stricter default handling to improve collection rates. Conclusion: Upon examining the regression equation of the prediction model, it is evident that individuals with lower income levels and a history of past defaults have a lower probability of payment. This implies that defaults occur among those without the ability to bear the burden of health insurance contributions, leading to long-term defaults. Social insurance operates on the principles of mandatory participation and burden based on the ability to pay. Therefore, it is necessary to develop policies that consider individuals' ability to pay, such as transitioning livelihood-type defaulters to medical assistance or reducing insurance contribution burdens.

• Journal of The Korean Association For Science Education
• /
• v.26 no.2
• /
• pp.200-211
• /
• 2006

The purpose of this study was to analyze Korean middle school student achievement in environmental science based on the TIMSS 2003 (Trends in International Mathematics and Science Study), a student comparison of 46 participating nations. Korea ranked the fourth with a mean score of 554 in environmental science. However, all 3 environment science topics assessed in TIMSS are not included in the Korean science curriculum through 8th grade, even though they are included in most other participating nations' curricula. The average percent correct of items was analyzed according to the main topic, the item type and the cognitive domain. Items that showed differences between the average percent correct of Korea and the international average as well as differences between the average percent correct of boys and girls were further analyzed. Results revealed that Korean students performed better than the international average, especially in 'use and conservation of natural resources', multiple-choice items, and items requiring 'factual knowledge'. Also, male students demonstrated significantly higher achievement than female students. On the other hand, Korean students showed relatively lower achievement in constructed-response items, items that contained content they had not learned in science lessons and items requiring descriptions of the uses and effect of science and technology. Moreover, Korean student lacked understanding about acid rain, global warming, and ozone layer destruction. Korean female students showed relatively lower environmental conceptions and lower performance on items requiring data analysis than Korean male students. On the basis of these results, this study suggested that topics of environmental science be included in the science curriculum and taught in the science classroom to help middle school students more fully comprehend environmental issues.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.28 no.1
• /
• pp.70-81
• /
• 2024

In this study, Tridimensional Hybrid Isolation System(THIS) was proposed as a vibration isolator for traffic loads, combining vertical and horizontal isolation systems. Its efficacy in improving serviceability for vertical vibration was analytically evaluated. Firstly, for the analysis, the major vibration modes of the existing apartment were identified through eigenvalue analysis for the system and pulse response analysis for the bedroom slab using commercial structural analysis software. Subsequently, a 16-story model with horizontal, vertical and rotational degrees of freedom for each slab was numerically organized to represent the achieved modes. The dynamic analysis for the measured acceleration from an adjacent ground to high-speed railway was performed by state-space equations with the stiffness and damping ratio of THIS as variables. The result indicated that as the vertical period ratio increased, the threshold period ratio where the slab response started to be suppressed varied. Specifically, when the period ratio is greater than or equal to 5, the acceleration levels of all slabs decreased to approximately 70% or less compared to the non-isolated condition. On the other hand, it was ascertained that the influence of damping ratios on the response control of THIS is inconsequential in the analysis. Finally, the improvement in vertical vibration performance of THIS was evaluated according to design guidelines for floor vibration of AIJ, SCI and AISC. It was confirmed that, after the application of THIS, the residential performance criteria were met, whereas the non-isolated structure failed to satisfy them.