• Journal of radiological science and technology
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• v.39 no.4
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• pp.661-667
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• 2016

The purpose of this was to study and analyze smart learning the self directed learning, self efficacy, learning satisfaction about department of radiology in a college. For this study total students 102 in 3 classes were surveyed at the end of semester. The research data was analyzed using SPSS also self directed learning, self learning efficacy, learning satisfaction analyzed t-test, ANOVA and Pearson's correlation coefficient results were followings. First, Men is more higher than women in a self learning efficacy, self directed learning, learning satisfaction. Second, in a learning satisfaction smart learning ever heard in a first time group more satisfaction. Third, during the smart learning classes a students appeared a positive response. As a results, learning satisfaction will increase a learning when learners need a ability of self control planning and learning motivation by themselves in voluntarily and actively. Suggest to change a paradigm in a radiology classes so we have to improve a teaching skills this solution recommend is two way communication. In conclusion, smart learning applied for classes of college is meaningful as a new teaching, which can be change gradually learning satisfaction by teaching methods.

• Proceedings of the KWS Conference
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• 2009.11a
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• pp.29-29
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• 2009

On this research, laser welding technology for manufacturing automobile body is studied. Laser welding technology is one of the important technologies used in the manufacturing of lighter, safer automotive bodies at a high level of productivity; the leading automotive manufacturers have replaced spot welding with laser welding in the process of car body assembly. Korean auto manufacturers are developing and applying the laser welding technology using a high output power Nd:YAG laser and a 6-axes industrial robot. On the other hand, the robot-based remote laser welding system was equipped with a long focal laser scanner system in robotic end effect. Laser system, robot system, and scanner system are used for realizing the high speed laser welding system. The remote laser welding system and industrial robotic system are used to consist of robot-based remote laser welding system. The robot-based remote laser welding system is flexible and able to improve laser welding speed compared with traditional welding as spot welding and laser welding. The robot-based remote laser systems used in this study were Trumpf's 4kW Nd:YAG laser (HL4006D) and IPG's 1.6kW Fiber laser (YLR-1600), while the robot systems were of ABB's IRB6400R (payload:120kg) and Hyundai Heavy Industry's HX130-02 (payload:130kg). In addition, a study of quality evaluation and monitoring technology for the remote laser welding was conducted. The welding joints of steel plate and steel plate coated with zinc were butt and lapped joints. The quality testing of the laser welding was conducted by observing the shape of the beads on the plate and the cross-section of the welded parts, analyzing the results of mechanical tension test, and monitoring the plasma intensity and temperature by using UV and IR detectors. Over the past years, Trumf's 4kW Nd:YAG laser and ABB's IRB6400R robot system was used. Nowadays, the new laser source, robot and laser scanner system are used to increase the processing speed and to improve the efficiency of processes. This paper proposes the robot-based remote laser welding system as a means of resolving the limited welding speed and accuracy of conventional laser welding systems.

• Korean Journal of Poultry Science
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• v.30 no.4
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• pp.281-287
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• 2003

This experiment was carried out to study the effect of dietary Monascus culture on the cholesterol contents of egg yolk, muscle and serum of layers with 180 Isa-Brown laying hens for 10 weeks. Control group(C) was fed the commercial laying hen diet and 2.67(T1), 5.33(T2) and 8.00(T3)% of Monascus culture which contained 0.6% monacolin-k added to control diet so as to supply the monacolin-k 20(T1), 40(T2) and 60(T3) mg respectively, per hen-day with 125g diet. Hen-day egg production and average egg weight were not affected by the dietary Monascus culture, but feed intake and feed conversion per kg egg were significantly decreased(P<0.05) as the dietary Monascus culture increased. Cholesterol contents of egg yolk measured 4~5 weeks after feeding the Monascus culture and those of thigh meat measured at the end of experiment were significantly decreased(P<0.05) as the dietary Monascus culture increased. Average cholesterol contents of serum showed a trend to decrease as the dietary Monascus culture increased without significant difference.

• Korean Journal of Medicinal Crop Science
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• v.12 no.1
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• pp.24-30
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• 2004

The immune activities of Ganoderma lucidum Mycelium added garlic extracts (GAM), Ganoderma lucidum Mycelium (GM), garlic extracts (GS) and standard $({\beta}-glucan)$ were compared. GAM enhanced the growth of human immune T cell up to $1.25{\sim}1.46$ times, compared to control group. GAM showed relatively lower cytotoxicity in using normal human lung cell, while GAM showed the most potent inhibitory effect on the human lung carcinoma, compared to GM and GS. The selectivity of GAM was also higher than that of GM and GS. GAM increased the secretion of cytokines, IL-6 and TNF- from human B cell as well as the growth of human immune cells. It can imply that GAM has higher immune activity than GM or GS.

• Korean Journal of Environmental Agriculture
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• v.10 no.1
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• pp.77-83
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• 1991

An animal experiment was performed to investigate the effects of dietary cadmium on growth rates and cadmium accumulations in internal organic tissues and blood by feeding mice with dietary $cdcl_2$ additives and/or brown rice with high cadmium content as during a 12-week feeding period. The results were as follows : Mice weights decreased with increasing levels of dietary cadmium at the end of a 9-week feeding period. The weights of mice organs in the cadmium-free feeding group were higher than in the cadmium-added groups, and the weights of mice organs did not show any significant differences among feeding groups with different levels of dietary cadmium. The concentrations of cadmium in kidney and liver were much higher than in other internal organs and blood, and the next higher concentration was in the heart. The cadmium accumulation in all internal organs and blood increased with increasing dietary cadmium levels, respectively. The ratios of cadmium accumulation in organ tissues and total blood of cadmium-added groups increased with decreasing dietary cadmium levels.

• Korean Journal of Biological Psychiatry
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• v.3 no.1
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• pp.102-108
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• 1996

This was an open trial to evaluate the efficacy and safety of moclobemide twice daily for treatment of Korean patients with major depressive disorder(DSM-III-R). The duration of the trial was 6 weeks with the initial dose of moclobemide being fixed lor the first two weeks at 300mg/day(150mg twice daily, each token after morning and evening meals). Thereafter, when necessary, the dose was allowed to increase to 600mg/day or decrease to 150mg/day according to the seventy of the depression and/or the tolerability of the drug. Hypnotics and/or sedatives from a benzodiazepine group could be concomitantly administered at usual dosage. Patients were assessed at baseline and at days 14, 28 and 42. Efficacy was primarily judged on the Hamilton Rating Scale for Depression(HAM-D) and Beck Depression Inventory(BDI). Patients had to score at least 17 respectively an both scales to enter the trial. Secondary efficacy parameters included Clinical Global Impression(CGI) for severity of illness and improvement. Safety and tolerability were judged on reported adverse events, vital signs and laboratory parameters. In addition, there was a series of questions and assessments for the psychiatrists and patients to complete at the end of the trial Twenty nine patients completing trial were included in the analysis of efficacy : of thirty one patients participating in the safety and tolerability analysis, those who withdraw voluntarily without particular reasons or violated the treatment schedule were not included. The efficacies as determined by HAM-D, BDI or CGI were found to be significant compared to baseline. The number of responders defined as patients with a total score of 10 or less or with a total score of 50% or less of the baseline score on HAM-D and BDI were 17(59%) and 18(62%) respectively. Regarding safety and tolerability, nine patients(29%) reported mild adverse events probably related to moclobemide : of these one patient dropped out because of poor tolerability : however, there were no appreciable changes in blood pressure, pulse rate, body weight or laboratory parameters for all patients over the trial period. Furthermore, the physicians' and patients' opinions at final evaluation showed that moclabemide has a good antidepressant effect as well as a favorable tolerability. In conclusion, a twice-daily dosage schedule with maclobemide is recommendable for the treatment of Korean patients with major depressive disorder since its efficacy and safety were demonstrated in this study.

• Proceedings of the Ginseng society Conference
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• 1988.08a
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• pp.70-76
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• 1988

Since ancient times, records pertaining to chi-reinforecenent of ginseng have been documented in books of Chinese nedicine. We, therefore, assessed the therapeutic effects of ginseng on patients with chi-deficiency syndrome. Eigheen cases of chi-deficiency, screened at the outpatient service in the internal department of Chinse medicine at the China Medical College Hospital. were prescribed two grams of Korean red ginseng powder three times daily for a two week period. For evaluation, a questionnaire and diagnosis by sphygmography were conducted prior to and after administration of the prescription. For control purposes, fourteen volunteers fasted for more than five days (seven had access only to ginseng. and the other seven were given only mineral water) and were subsequently evaluated by the same criteria. Three results were obtained for the ginseng treated group: (1) improvements in symptoms of chi-deficiency such as fatigue and dizziness; (2) changes in pulse waves with time domains showing alternate P-waves, strengthened dicrotic waves, and some minute waves in the end-diastolic period; (3) frequency domains with enhanced amplitudes around 12Hz. These three findings, which are consistent with each other, suggest the reinforcement of the effect of ginseng on 'heart-spleen chi' in Chinese medicine.

• Annals of Clinical Neurophysiology
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• v.3 no.2
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• pp.136-142
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• 2001

Background : Nervous system dysfunction is a major complication of end stage renal disease. Although severe neurologic symptoms are partially or completely reversed by adequate hemodialysis, even optimally dialyzed patients will usually not return to normal neurocognitive function. To investigate the influence of chronic renal failure and hemodialysis on higher cognitive function electrophysiologically, we studied auditory P300 event-related potentials in 14 hemodialysis patients and 14 age- and sex-matched normal healthy controls. Methods : The subjects consisted of 14 patients(M: 6, F: 8) with chronic renal failure(CRF) for 1 to 10 years and 14 age- and sex-matched healthy controls(M: 5, F: 9). For the reliability of study, patients with diabetes mellitus, abnormal brain CT findings, or low mini-mental state score(below 20) were excluded. Event related potentials(ERPs) for hemodialysis patients were performed at pre- and post-hemodialysis. To obtain ERPs, subjects underwent 2-tone auditory discrimination test(oddball paradigm). Results : Although the age(control: $48.79{\pm}10.31years$, CRF: $51.21{\pm}7.61years$) and mini-mental state score(control: $27.00{\pm}1.71points$, predialysis CRF: $25.07{\pm}3.58points$) were not different in normal control and CRF groups significantly(P>0.05), P300 latencies at Cz(control: $288.11{\pm}17.36msec$, predialysis CRF: $332.35{\pm}42.34msec$) were significantly delayed(P<0.05)and the duration of Trail making test A was significantly prolonged(control: $64.2{\pm}24.2sec$, CRF: $118.9{\pm}101sec$) in CRF group. P300 latencies between pre- and post-hemodialysis CRF patients(predialysis CRF: $332.35{\pm}42.34msec$, postdialysis CRF: $325.82{\pm}38.69msec$) were not significantly different. The P300 latency was not related with the duration of CRF(Spearman's correlation test, r=0.25, P>0.05) and the frequency of hemodialysis(Spearman's correlation test, r=0.28, P>0.05). Conclusions : From these results, we suggest that P300 latency is valuable in evaluating cognitive brain dysfunction in patients with CRF and hemodialysis does not have a significant effect on cognitive brain dysfunction in patients with CRF.

• Informatization Policy
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• v.29 no.2
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• pp.106-126
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• 2022

The digital divide issue is re-emerging in step with the rapid progress of digital transformation. Recently, the discussion of the digital divide is expanding to the point that the difference in digital access and use competency deepens economic and social inequality and discrimination. Notably, the phenomenon of the exclusion and alienation of the elderly from society is a serious matter to be addressed. Accordingly, this research was conducted to provide practical help in minimizing the digital divide through its understanding among the elderly. To this end, both the accomplished capital accumulated and experienced in the course of life and their attitudes toward technology in relation to digital competence capital by the elderly were examined in three dimensions. This analysis was conducted using the results of the '2020 The Report on the Digital Divide'. The target group of the analysis comprised 653 seniors aged 65 and above. As a result of the analysis, digital competence capital among the elderly was affected by both various types of accomplished capital such as educational, income, social, and emotional capital and digital device use attitude. Based on this, this study proposed measures to bridge the digital divide among the elderly.

• Journal of Animal Science and Technology
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• v.64 no.2
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• pp.380-395
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• 2022

This study investigated the utilization of detoxified Rhus verniciflua (RV) extract as a natural antioxidant to extend the shelf life of chicken breast meat during storage. Pre-heating at (35℃, 100℃, 120℃, and 140℃) was conducted on heartwood of RV prior to extraction to improve its antioxidant activity and remove the allergenic compound urushiol. The antioxidant activity was the highest when RV pre-heated at 120℃ with the 2,2-diphenyl-1-picrylhydrazyl (DPPH) and azinobis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) scavenging activity observed at 62.29 EC₅₀ ㎍/mL and 12.11 IC₅₀ mg/mL, respectively. Pre-heating also significantly increased the total phenolic content (TPC), with the highest improvement was seen at 120℃, 100℃, and 140℃ respectively, wherein 35℃ shared no difference with the raw RV (RRV). Urushiol content was vanished following pre-heating at 120℃ and 140℃. With respect to these result, pre-heating treatment at 120℃ was applied before the extraction of the heartwood of RV. Prepared breast meat sample was dipped into distilled water as a negative control, 0.02% butylated hydroxytoluene (BHT) as positive control, and a solution containing detoxified RV extract (0.10%, 0.25%, 0.50%, 1.00%) at 4℃ for 60 min. Treatment group with 0.50% and 1.00% addition increased the redness and yellowness value on day 6 and day 3 of storage respectively (p < 0.05). The pH value of breast meat was also increased in treatment of 0.50% and 1.00% on day 0, but subsequently lower until end of storge day compared to control negative (p < 0.05). Furthermore, 0.50% treatment exhibited a higher antioxidant activity, stronger inhibition of the microbial growth evaluated by total viable count and maintaining a lower total volatile basic nitrogen among treatments (p < 0.05), unless for BHT and 1.00% treatment groups (p > 0.05). It indicates a similar efficacy of detoxified RV extract with that of positive control treated with BHT. The results of this study suggested that dipping chicken breast meat into a solution containing 0.50% of previously pre-heated RV heartwood at 120℃ could be a promising natural antioxidant for extending the shelf life, and at the same time improve its quality during storage.