• Korean Journal of Food Science and Technology
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• v.28 no.1
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• pp.53-57
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• 1996

As the production of chonma became increased by the farmer's cultivation, developments of the processed food such as tea using chonma have been actively pursued. In the present study, the components of chonma and its beneficial effects on health using SD (Sprague-Dawley) rat model were analyzed. The contents of moisture, protein, ash, fat and fiber in dried-chonma were 11.8, 7.6, 3.2, 0.5, and 3.9%(w/w), respectively. The contents of calcium, sodium, iron, phosphorus, magnesium and potassium were 121, 83, 6.2, 170, 69 and 1,278 mg%. When chow diets containing 0, 0.15, 1.5 or 5.0% chonma powder were fed to SD rats for 4 weeks, no significant differences were observed in the composition of the large-intestinal flora, ${\beta}-glucuronidase$ level of the large-intestinal contents and the weight gains of rats. The level of ${\beta}-glucosidase$ was higher and the serum cholesterol level was lower in 5.0% chonma group compared with control group. The highest sedative effect was shown in 0.15% chonma group.

• Journal of Digital Convergence
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• v.17 no.3
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• pp.129-137
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• 2019

The purpose of this study is to investigate the effects of the actual self congruity and the ideal self congruity on positive attitudes toward city through fictitious city brand experiments. Additionally, the moderating role of city brand personality in relationship between brand-self congruity and positive attitudes are examined. This research conducted a survey after developing scenarios of two city brand personality. Frequency analysis to identify the characteristics of respondents, t-test to check the experimental manipulation, multiple regression analysis and chow test for hypothesis testing were performed through the SPSS Statistics 21 program. The self congruity of city brand had significant effects on attitudes toward city, but the moderating role of city brand personality was not significant. Theoretical and managerial implications of the findings were discussed and self congruity is an important variable in brand-consumer relationship in city brand. Finally, limitations of this study and future research directions were discussed.

• Journal of Korea Entertainment Industry Association
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• v.14 no.1
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• pp.107-116
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• 2020

The Hong Kong film "Project Gutenberg" has obtained the great achievements at the box office and public reputation due to such multiple factors as realistic counterfeit banknote production process, breathtaking gunfight scenes, brain-burning plot, unexpected reversal ending, personal charm of Chow Yun-Fat and so on. In terms of film narrative, the director utilized the narrator, Li Wen, to guide the police and audience in the limited angle of perspective into the scheme, and make the symbolic meaning image of the actor Chow Yun-Fat stengthen the audience's confirmation for the imagination of "painter", with the introduction of multiple narratives and flashback of different characters and scenes, and then finally, used the narrative structure with multiple lines and layers to uncover the truth. There are three great reversals in the film, each of which is overthrow for the film plot, and every overthrow is a disavowal of the audience's cognition for the previous story; therefore it brings the greatly emotional tension, making the audience get complete release and relief in the process of the psychological game of cognition, identification and decision-making at the end.

• Journal of Ginseng Research
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• v.47 no.2
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• pp.319-328
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• 2023

Background: Demyelination has been observed in neurological disorders, motivating researchers to search for components for enhancing remyelination. Previously we found that Rb1, a major ginsenoside in Korean Red Ginseng (KRG), enhances myelin formation. However, it has not been studied whether Rb1 or KRG function in remyelination after demyelination in vivo. Methods: Mice were fed 0.2% cuprizone-containing chow for 5 weeks and returned to normal chow with daily oral injection of vehicle, KRG, or Rb1 for 3 weeks. Brain sections were stained with luxol fast blue (LFB) staining or immunohistochemistry. Primary oligodendrocyte or astrocyte cultures were subject to normal or stress condition with KRG or Rb1 treatment to measure gene expressions of myelin, endoplasmic reticulum (ER) stress, antioxidants and leukemia inhibitory factor (LIF). Results: Compared to the vehicle, KRG or Rb1 increased myelin levels at week 6.5 but not 8, when measured by the LFB⁺ or GST-pi⁺ area within the corpus callosum. The levels of oligodendrocyte precursor cells, astrocytes, and microglia were high at week 5, and reduced afterwards but not changed by KRG or Rb1. In primary oligodendrocyte cultures, KRG or Rb1 increased expression of myelin genes, ER stress markers, and antioxidants. Interestingly, under cuprizone treatment, elevated ER stress markers were counteracted by KRG or Rb1. Under rotenone treatment, reduced myelin gene expressions were recovered by Rb1. In primary astrocyte cultures, KRG or Rb1 decreased LIF expression. Conclusion: KRG and Rb1 may improve myelin regeneration during the remyelination phase in vivo, potentially by directly promoting myelin gene expression.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.05a
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• pp.115-117
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• 2022

Whitebox encryption technique is a method of preventing exposure of encryption keys by mixing encryption key information with a software-based encryption algorithm. Whitebox encryption technique is attracting attention as a technology that replaces conventional hardware-based security encryption techniques by making it difficult to infer confidential data and keys by accessing memory with unauthorized reverse engineering analysis. However, in the encryption and decryption process, a large lookup table is used to hide computational results and encryption keys, resulting in a problem of slow encryption and increased memory size. In particular, it is difficult to apply whitebox cryptography to low-cost, low-power, and light-weight Internet of Things products due to limited memory space and battery capacity. In addition, in a network environment that requires real-time service support, the response delay time increases due to the encryption/decryption speed of the whitebox encryption, resulting in deterioration of communication efficiency. Therefore, in this paper, we analyze whether the AES-based whitebox(WBC-AES) proposed by S.Chow can satisfy the speed and memory requirements based on the experimental results.

• 한국체육학회지인문사회과학편
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• v.54 no.2
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• pp.431-439
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• 2015

The purpose of this study was to investigate the effects of resistance exercise training and high-protein diet on anabolic factors and insulin resistance of skeletal muscle in sarcopenic obese rats. 50wks of male Sprague-Dawley rats were randomly assigned for 4 groups(Chow, HP, Ex, HPEx) after 6 weeks of high-rat diet induced obesity period. The 8-week of ladder climbing exercise significantly reduced body fat and insulin resistance, significantly increased mTOR activity. However hind limb muscles weight were not changed. When treat with exercise and high-protein diet, body fat and insulin resistance did not improve, but rather the effect of exercise training appeared to be inhibited. Therefore high protein diet for improving the sarcopenic obesity may be need more study about the amount and composition of protein.

• 한국노년학
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• v.31 no.2
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• pp.419-437
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• 2011

The purpose of this study is to compare on the productive activities and life satisfaction between rural and urban elderly. Economic activities and caring labor activity had a negative effect on life satisfaction. but, community participation had a positive effect. In other words, the concept of productive activities in life satisfaction has multidimensionality. Therefore, using multiple indicators to measure is inappropriate. And, according to Chow test, coefficients that describe the structure of life satisfaction were different between the elderly living in rural and urban. The self-actualization needs of the elderly can be interpreted as due to be implemented differently, because of the different cultures of urban and rural areas. And, In life satisfaction, we have found that individual volunteer activity is more effective than volunteer through groups.

• Journal of Ginseng Research
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• v.47 no.5
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• pp.672-680
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• 2023

Background: Korean Red Ginseng (KRG), the steamed root of Panax ginseng, has pharmacological activities for immunological and neurodegenerative disorders. But, the role of KRGE in multiple sclerosis (MS) remains unclear. Purpose: To determine whether KRG extract (KRGE) could inhibit demyelination in corpus callosum (CC) of cuprizone (CPZ)-induced murine model of MS Methods: Male adult mice were fed with a standard chow diet or a chow diet supplemented with 0.2% (w/w) CPZ ad libitum for six weeks to induce demyelination while were simultaneously administered with distilled water (DW) alone or KRGE-DW (0.004%, 0.02 and 0.1% of KRGE) by drinking. Results: Administration with KRGE-DW alleviated demyelination and oligodendrocyte degeneration associated with inhibition of infiltration and activation of resident microglia and monocyte-derived macrophages as well as downregulation of proinflammatory mediators in the CC of CPZ-fed mice. KRGE-DW also attenuated the level of infiltration of Th1 and Th17) cells, in line with inhibited Mrna expression of IFN-γ and IL-17, respectively, in the CC. These positive effects of KRGE-DW mitigated behavioral dysfunction based on elevated plus maze and the rotarod tests. Conclusion: The results strongly suggest that KRGE-DW may inhibit CPZ-induced demyelination due to its oligodendroglial protective and anti-inflammatory activities by inhibiting infiltration/activation of immune cells. Thus, KRGE might have potential in therapeutic intervention for MS.

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• v.5B no.2
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• pp.103-110
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• 2005

Broken rotor bars in induction motors can be detected by monitoring any abnormality of the spectrum amplitudes at certain frequencies in the motor current spectrum. Broken rotor bar fault detection schemes should rely on multiple signatures in order to overcome or reduce the effect of any misinterpretation of the signatures that are obscured by factors such as measurement noises and different load conditions. Multiple Discriminant Analysis (MDA) and Artificial Neural Networks (ANN) provide appropriate environments to develop such fault detection schemes because of their multi-input processing capabilities. This paper describes two fault detection schemes for broken rotor bar fault detection with multiple signature processing, and demonstrates that multiple signature processing is more efficient than single signature processing.

• Korean System Dynamics Review
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• v.8 no.2
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• pp.25-49
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• 2007

An important assumption of the classical linear regression model is that the disturbances appearing in the population regression function are homoskedastic; that is, they all have the same variance. If we persist in using the usual testing procedures despite heteroskedasticity, what ever conclusions we draw or inferences we make be very misleading. The contribution of this paper will be to the concrete procedure of the proper estimation when the heteroskedasticity does exist in the data, because the quality of dependent variable predictions, i.e., the estimated variance of the dependent variable, can be improved by giving consideration to the issues of regional homogeneity and/or heteroskedasticity across the research area. With respect to estimation, specific attention should be paid to the selection of the appropriate strategy in terms of the auxiliary regression model. The paper shows that by testing for heteroskedasticity, and by using robust methods in the presence of with and without heteroskedasticity, more efficient statistical inferences are provided.