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Performance evaluation of differently structured RCE-DR GdBCO coated conductor tapes under uniaxial tension at 77 K

  • Diaz, Mark Angelo E.;Shin, Hyung-Seop;Jung, Ho-Sang;Lee, Jaehun
    • Progress in Superconductivity and Cryogenics
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    • v.24 no.1
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    • pp.13-17
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    • 2022
  • The mechanical properties of REBCO coated conductor (CC) tapes under uniaxial tension are mainly determined by the thick layer Components like the substrate and the stabilizer. Depending on the applications of the CC tapes, it is also needed to externally reinforce thin metallic foils to one side or both sides of the CC tapes. This study investigated the effect of additional stabilizer layers or lamination on the electrical resistivity and electromechanical properties in RCE-DR processed GdBCO CC tapes with different structures. The strain/stress tolerance of Ic in differently processed 12 mm-wide REBCO CC tapes under uniaxial tension at 77 K and self-field could be determined by the loading-unloading scheme. As a result, Sn-Cu stabilized CC tape showed a significant decrease in mechanical properties due to its soft but thick stabilizing layer. However, similar electromechanical properties have been observed on both Sn-Cu and Sn-stabilized CC tapes, the Ic degradation behavior was independent of whether the CC tape has an external reinforcement or different stabilizing layers.

Associations between the Frequency and Quantity of Heated Tobacco Product Use and Smoking Characteristics among Korean Smoking Adolescents

  • Lee, Haein;Lee, Bo Gyeong
    • Journal of Korean Academy of Nursing
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    • v.53 no.2
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    • pp.155-166
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    • 2023
  • Purpose: Although heated tobacco product (HTP) use among adolescents is an emerging public health problem, little is known about the frequency and quantity of HTP use. Thus, we investigated the associations between the frequency and quantity of HTP use and smoking characteristics (i.e., combustible cigarette [CC] and electronic cigarette [EC] use, and attempts to quit smoking) among CC-smoking adolescents. Methods: We analyzed nationally representative data from 2,470 Korean adolescents who were current CC smokers. To investigate our aim, we conducted multinomial logistic and logistic regression analyses. Results: We found that daily and heavier CC users had greater likelihoods of more frequent and heavier HTP use. In addition, dual users of CCs and ECs were more likely to use HTPs more frequently and heavily than CC users who did not use ECs. Moreover, daily EC users had the highest risk of frequent and heavy HTP use. The frequency and quantity of HTP use were not associated with attempts to quit smoking. Compared to CC-only use, dual use of CCs and HTPs was not associated with quitting attempts, and triple use of CCs, ECs, and HTPs was associated with a lower likelihood of quitting attempts. Conclusion: HTP use was less likely to displace CC use and promote attempts to quit smoking. Thus, strict regulations are required to prevent the promotion of HTPs as a substitute for CCs or as a means of quitting smoking. Additionally, health professionals should consider preventive interventions for HTP, as well as CC and EC use among adolescents.

Development of an Automated Control System for Bioreactor using the Plant Tissue Culture (식물조직배양용 바이오리액터의 농도제어 시스템 개발)

  • Chung, Seok-Hyun;No, Daehyun;Kang, Changho;Kang, Sukwon;Han, Bong-Hee;Lee, Gee-Myung;Na, Young-Sun
    • Journal of Plant Biotechnology
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    • v.31 no.4
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    • pp.307-312
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    • 2004
  • The bioreactor system for the large-scale plant tissue culture was developed to control the pH concentration and DO (dissolved oxygen), and air flowrate. The system controlling the proper air flow rate for each bulblet growth stage and monitoring the contamination of bioreactor using the pH change was controled by computer program. For the uniform bulblet distribution in bioreactor, the proper air flow rate was 300 cc/min at the beginning of bulblet culture, 400 cc/min after 20 days, 500 cc/min after 40 days, 600 cc/min after 60days, and 700 cc/min after 80 days. It was possible to maintain the pH concentration within 5.5$\pm$0.5 during the culture by control system of bioreactor.

Activation Mode and Glycosidic Linkage of Anti-Complementary Polysaccharide Isolated from Young Stems of Cinnamomum cassia Blume (계지(桂枝)에서 정제한 보체계 활성화 다당의 작용양식과 당쇄구조)

  • Ra, Kyung-Soo;An, Hyun-Jung;Kweon, Mee-Hyang
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.26 no.2
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    • pp.248-253
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    • 1997
  • The paper describes the activation mode and the glycosic linkage of anti-complementary polysaccharide isolated from Cinnamomum cassia. The polysaccharide fractions, CC-IIIa, CC-IIIb, and CC-IIIc, activated C3 component existed in normal human serum and produced C3 cleavage segments, C3a and C3b. The polysaccharide, CC-2-IIIa-3 activated the complement system both in the presence and absence of $Ca^{++}$, suggesting that it involved in both classical and alternative complement pathways. Methylation of CC-2-IIIa-3 was performed with methylsulphinyl carbanion and methyl iodide in DMSO. The methylated products was hydrolyzed, then converted into the partially methylated alditol acetates. Gas chromatography-mass spectrometry(GC-MS) revealed derivatives of terminal $Glc{\rho}$ and $Gal{\rho}$, 1,2-linked $Rha{\rho}$, 1,6-linked $Man{\rho}$, 1,3-linked $Glc{\rho}$, 1,6-linked $Gal{\rho}$ etc.

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Components in Chinese Cabbage (Brassica rapa ssp. campestris) as Affected by Soil pH: 6.9 vs. 7.6 (토양의 pH (6.9 vs. 7.6)에 의한 배추 (Brassica rapa ssp. campestris) 의 성분에 대한 영향)

  • Jo, Man-Hyun;Ham, In-Ki;Lee, Eun-Mo;Lee, Jo-Eun;Jiang, Nan;Lim, Yong-Pyo;An, Gil-Hwan
    • Korean Journal of Agricultural Science
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    • v.37 no.1
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    • pp.73-80
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    • 2010
  • Functional and nutritional components of 7 cultivars of Chinese cabbage (CC; Brassica rapa subspecies campestris) from China were analyzed to compare the effects of soil pH (6.9 vs. 7.6). The CC grew on the soil of pH6.9 (CC-6.9) contained significantly increased amounts (2.3~4-fold) of pectin, crude protein, vitamin C and vitamin E compared to the control. The contents of ash and minerals (Ca, Fe, Na, Zn, K and Mn) were also significantly increased in CC-6.9. However, CC-6.9 contained 16-75% lower contents of reducing sugars, cellulose and crude fat than CC-7.6. CC-7.6 contained more glucosinolates than CC-6.9; gluconasturtiin (20.68 vs. 0.84 $nmol{\cdot}g^{-1}$ wet wt) and gluconapin (202.55 vs. 0.15 $nmol{\cdot}g^{-1}$ wet wt). In conclusion, CC-6.9 had an improved texture (high pectin and low cellulose) and nutritional value (high in protein, Ca, Fe, Zn, vitamin C, and E), whereas CC-7.6 had better taste (high in reducing sugars) and anticancer functionality (high in glucosinolates).

Development of Security Evaluation Management System Based on Common Criteria (공통평가기준을 기반으로 한 보안평가관리 시스템의 개발)

  • Kang Yeon-Hee;Bang Young-Hwan;Lee Gang-Soo
    • The Journal of Society for e-Business Studies
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    • v.10 no.3
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    • pp.67-83
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    • 2005
  • Common Criteria(CC) was announced in June, 1999 in order to solve a problem which be happened by applying a different evaluation criteria among nations. Currently, a official version is v2.2 and v3.0 is a draft version. Because an evaluation demand is increased in the inside and outside of the country, an evaluation market growth is expected. Also, It needs methodology and work automation and project management for evaluation. In this paper, we propose A CC based Security Evaluation Management System(CC-SEMS) that is managing evaluation resources(deliverables , evaluation criteria, evaluators) and is useful in evaluation environment efficiently. CC-SEMS is to have integrated project management, workflow management, process management and is composed of deliverables, Evaluation Activity Program(EAP), Management Object(MO), Evaluation Database(EDB), Evaluation Workflow Engine(EWE).

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Test Case Generation for Conformance Test of DSM-CC U-U (DSM-CC U-U 적합성 시험을 위한 시험열 생성)

  • Kim, Young-Gyu;Lee, Ok-Bin;Kim, Hak-Suh;Kwon, Young-Duk;Lee, Sang-Ho
    • The Transactions of the Korea Information Processing Society
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    • v.6 no.8
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    • pp.2171-2178
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    • 1999
  • In these days, as rapid growth of multimedia industries and development of techniques, and effort to develop DAVIC(Digital Audio-Visual Council) systems which support multimedia services such as VOD(Video onn Demand) and teleshopping is being done. Therefore it will be indispendable to establish a new conformance testing method related DAVIC system with respect to their standard specification. DSM-CC is a core part of DAVIC and adopts DSM-CC U-N for S3 information stream which plays a part in connection establishment and release of session and transmission layer, and DSM-CC U-U for S2 which operates user application of the system. In this paper, we propose a new conformance testing architecture and methodology based on scenario in order to test DSM-CC U-U which doesn't have any message sequences.

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Biocontrol of Ginseng Damping-off by Bacillus velezensis CC112 (Bacillus velezensis CC112 균주의 인삼 잘록병에 대한 생물적 방제)

  • Lee, Sang Yeob;Song, Jaekyeong;Park, Kyeong Hun;Weon, Hang Yeon;Kim, Jeong Jun;Han, Ji Hee
    • The Korean Journal of Mycology
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    • v.44 no.3
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    • pp.176-183
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    • 2016
  • Bacillus velezensis CC112 inhibited the mycelial growth of several plant pathogens, including Rhizoctonia solani, causing damping-off on ginseng. The control efficacies of B. velezensis CC112 against R. solani by seed dipping in LB and BSM broth diluted 10 times, soil dipping, and soil drenching with LB broth diluted 10 times were 65.8%, 67.1%, and 64.2%, respectively. Treatment of soil drenching with the 100 times diluted prototype of B. velezensis CC112 against R. solani and Pythium sp. by soil revealed control efficacies of 77.3% and 65.7%, respectively. These results indicate that B. velezensis CC112 is a prospective biofungicide for the biological control of ginseng damping off.

Effect of Co-administration of Aconiti Lateralis Preparata Radix and Cinnamomi Cortex on Osteoclast Differentiation (부자와 육계 병용투여 시 파골세포 분화 억제에 미치는 영향)

  • Jung, Gi-Eun;Kim, Jung Young;Kim, Ji-Hoon;Han, Sang-Yong;Kim, Yun-Kyung
    • The Korea Journal of Herbology
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    • v.29 no.2
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    • pp.61-67
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    • 2014
  • Objectives : Aconiti Lateralis Preparata Radix (Aconitum Carmichaeli, AC) and Cinnamomi Cortex (Cinnamomi Cortex, CC) have been treated to elderly for kidney yang enhancement in Korean traditional medicine. In this study, the effects of water extract of AC and CC on RANKL (Receptor Activator for Nuclear Factor ${\kappa}B$ Ligand)-induced osteoclast differentiation were evaluated in culture system. Methods : MTT assay was used to evaluate the potential cytotoxicity of AC and CC extracts in bone macrophage marrows (BMMs) stimulated with M-CSF. TRAP (tartrate-resistant acid phosphatase) staining and TRAP activity were performed to know the inhibitory effect on osteoclast differentiation. The protein expression levels of nuclear factors such as activated T cell(NFAT)c1, c-Fos, MAPKs and ${\beta}$-actin in cell lysates treated with AC and CC extracts were analysed by western blotting. Results : AC, CC extracts and their co-administration inhibited significantly RANKL-induced osteoclast differentiation in BMMs in a dose dependent manner without toxicity. Each AC and CC extracts inhibited the phosphorylation of p38. Also, AC and CC extracts, respectively, inhibited the protein expression of c-Fos and NFATc1 more than Co-administration of AC and CC even if all treatments did. It was observed that RANKL-induced degradation of I-${\kappa}B$ is significantly suppressed by all treatments. Conclusions : Taken together, It was concluded that AC and CC have beneficial effect on osteoporosis by inhibition of osteoclast differentiation. Thus, Atractylodis AC and CC could be a treatment option for osteoporosis.

Effect of Non-Perforated Breathable Films on the Storability of 'Fuji' Apples in Modified Atmosphere Condition in the Different Storage Temperature (비천공 Breathable필름이 몇 가지 저장온도에서 '후지' 사과의 MA 저장성에 미치는 영향)

  • Choi, In-Lee;Sung Mi, Hong;Min Jae, Jeong;Jun Pill, Baek;Ho-Min, Kang
    • Journal of Bio-Environment Control
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    • v.23 no.1
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    • pp.60-64
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    • 2014
  • These studies were conducted to identify the effects of non-perforated breathable package film on storability at $1^{\circ}C$, $8^{\circ}C$, and $20^{\circ}C$ storage of 'Fuji' apples. The fresh weight loss rate was less than 2.0% in all non-perforated breathable films at three different storage periods and temperatures, $1^{\circ}C$; 210 days, $8^{\circ}C$; 75 days, and $20^{\circ}C$; 30 days except for the perforated film. 1,300 cc ($1^{\circ}C$), 5,000 cc ($8^{\circ}C$), and 10,000 cc ($20^{\circ}C$) films were closed at the optimum MA storage condition by carbon dioxide and oxygen concentration. Ethylene concentration was lowest at the 40,000 cc film in every temperatures during storage. The 1,300 cc film established higher result in soluble solid and vitamin C content than any other films at $1^{\circ}C$, also showed higher in visual quality by panel test. The 5,000 cc film had the best results on soluble solid and off-flavor in $8^{\circ}C$. In the $20^{\circ}C$ storage after 30 days of treatment the 10,000 cc film had highest firmness and visual quality. Following these results, it come to conclusion the suitable type of non-perforated breathable film such as 1,300 cc at $1^{\circ}C$, 5,000 cc at $8^{\circ}C$, and 10,000 cc at $20^{\circ}C$ for MA storage in 'Fuji' apples.