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        검색결과 22

        1.
        2023.05 구독 인증기관·개인회원 무료
        Fault activity acts as the greatest risk factor in relation to the stability of the radioactive waste disposal facilities and nuclear power plant site, and for this reason, geological studies on areas with past fault activity history must precede site evaluation studies. This study aims to trace the fault activity history of large fault zones, including the Yangsan fault in the southeastern part of the Korean Peninsula, where two major earthquakes occurred, and to obtain fault activity direction information that is the basis for stability evaluation. The 3D-Shape Preferred Orientation (SPO) of particles in the fault rock created by the earthquake was investigated to analyze the direction of fault plane activity, and the age of fault activity was estimated through Illite Age Analysis (IAA) analysis. It is expected that the large-scale fault activity information in the southeastern part of the Korean Peninsula obtained through the SPO and IAA analysis can be used as basic data for safety evaluation of existing or future nuclear power plants and radioactive waste facilities.
        4.
        2020.08 KCI 등재 구독 인증기관 무료, 개인회원 유료
        전기장에 의해 생성 된 진공 분극은 양자장에서 가상 전자-양전자 쌍의 재배열을 만든다. 그러나 정지 전하가 다른 장소로 이동할 때, 정지 전하에 의해 생성된 전기장은 사라질 것이다. 이때, 정지 전하에 의해 분극화된 가상 전자-양전자 쌍들은 같이 소멸된다. 가상 전자-양전자의 소멸 과정에서 가상 광자가 생성되는데, 이때 만들어지는 가상 광자들은 양자 전기 역학에서 자기력을 매개하는 광자가 된다. 이로 인하여, 전하의 이동은 자기장을 발생시키고, 전기장의 변화가 자기장을 생성하게 하는 원인이 된다.
        3,000원
        6.
        2018.07 구독 인증기관·개인회원 무료
        This study aims to analyse the overall sentiments of online reviews on restaurants in Malaysia using predictive text analytics. As we know in opinion mining, sentiment analysis is a prominent technique in predictive text mining. It is a technique that categorises opinions in unstructured text format into binary classification (ie. good or bad). The authors attempt to go beyond the binary classification by viewing texts as empirical entities derived using the Term Frequency - Inverse Document Frequency (TF-IDF) weighting algorithm. These empirical entities, based on online reviews of restaurants in Malaysia, are then manifested into hypothetically defined constructs closely reflecting their thematic and semantic nature. The were 4914 customer reviews from restaurants across 20 towns and cities in Malaysia scraped off TripAdvisor.com using web crawler tools. Then a series of analytical tests were carried out. First the online reviews were parsed, filtered and clustered using SAS Text Miner. Then the online reviews underwent the TF-IDF process to identify significant terms and weightages were assigned according to their importance. The TF-IDF process resulted in a series of important nouns and adjectives from the text corpus. Using these weightages of nouns and adjectives, the authors went on to thematise these terms based on their semantic nature to manifest hypothetical constructs. These constructs were based on the Mehrabian–Russell Stimulus Response Model. Subsequently the authors tested the associations among the constructs using variance-based and covariance-based Structural Equation Modelling (SEM). The authors were encouraged by this exploratory methodological approach in formulating predictive text analytics using SEM. Results indicated that sentiments were generally positive towards restaurants and the important terms derived were price, hospitality, location, waiting time, availability of parking and size of food portion.
        7.
        2014.06 구독 인증기관·개인회원 무료
        Information and communication technology(ICT) around the world in the 21st century presents a new vision of agriculture. Time, place, and the high-tech industry to overcome barriers to the fusion of the so-called "smart agriculture" is changing the landscape of agriculture. Precision Agriculture's core temperature, humidity, location information, and summary information in real time, all significant ICT controlling technique. The system is a four-season container production for the mushroom cultivation temperature, humidity, illumination, self-regulation, such as carbon dioxide, the optimal environment for mushroom cultivation was implemented. Hericium erinaceum (also called Lion's Mane Mushroom, Bearded Tooth Mushroom, Hedgehog Mushroom, Satyr's Beard, Bearded Hedgehog Mushroom, pom pom mushroom, or Bearded Tooth Fungus) is an edible mushroom and medicinal mushroom in the tooth fungus group. Native to North America, Europe and Asia it can be identified by its tendency to grow all the spines out from one group (rather than branches), long spines (greater than 1 cm length) and its appearance on hardwoods. The humidity was maintained more than 85~90% and temperature was 16~18℃, and CO2 density was 500ppm. The days for primordium formation showed us 7~12 days. The width of pileus was 77~115mm. The length of pileus was 43~72mm. The spine was 11~14mm. The amount of fruitbody production was 125~240g per bag. This technique to establish the agricultural sector of Official Development Assistance (ODA) projects and new community support program in conjunction with the international movement, domestic sales and exports are also planned.
        10.
        2007.12 구독 인증기관 무료, 개인회원 유료
        In this study, we exarnined the effects of different concentrations of red pepper seed (0%, 1%, 3%, 5%, and 7%) on pH, total acidity, color, reducing sugar content, total microbes, lactic acid bacteria, and sensory quality, in terms of prolonging the shelf-life of kimchi. The additions of red pepper seed resulted in higher pH leveIs, while total acidity was lower than that of the control. The kimchi with red pepper seed had higher reducing sugar contents than the control. Furthermore, the kimchi with red pepper seed showed higher b-values than the control. During fermentation, the arnounts of lactic acid bacteria and total microbes were higher in the kimchi with red pepper seed than in the control, and the higher ratios resulted in higher quality kimchi. The additions of red pepper seed also resulted in changes of color, flavor, taste, and texture, having a large influence on overall product quality. In conclusion, in terms of preservation and consumption, the 3% and 5% red pepper seed concentrations offered enhanced shelf-life and better quality kimchi products.
        4,000원
        12.
        2020.12 KCI 등재 서비스 종료(열람 제한)
        Lilium lancifolium (LL) is widely cultivated in East Asia and used to attenuate airway diseases. Our current study aimed to investigate the therapeutic effect of LL on pain level and inflammatory response in a rat model of monosodium iodoacetate (MIA)-induced osteoarthritis (OA). We first examined the effect of LL on inflammatory cytokines and inflammatory mediators in IL-1β-treated HTB-94 cells. The LL extract was found to significantly inhibit the levels of Interleukin-6 (IL-6), Interleukin-8 (IL-8), and prostaglandin-E2 (PGE-2) in Interleukin-1 β (IL-1β)-stimulated HTB-94 cells in a dose-dependent manner. Moreover, chronic oral administration of LL effectively restored the weight-bearing distribution in the rat model of MIA-induced OA. In addition, administration of LL inhibited inflammatory cytokines and inflammatory mediators, such as C-reactive protein (CRP), IL-6, leukotriene B4 (LTB-4), PGE-2, and matrix metalloproteinase-9 (MMP-9). Our findings collectively suggested LL as one of the potential therapeutic agents for OA, owing to its properties of reducing pain and inflammatory responses.
        13.
        2019.10 서비스 종료(열람 제한)
        Tuberculosis (TB) is still a significant public health problem in Korea. In many cases, it is not easy to diagnose TB. A 13-year-old male patient was admitted for left chest pain for 6 months period. Chest radiography done two months ago during the school screening revealed a pleural effusion in the left lung. All cultures were negative, and 3 sputum samples and his pleural fluid sample tested negative for Acid-fast bacilli. There was no evidence of a malignant effusion. A pleural fluid examination revealed features suggestive of an empyema. Thick and yellowish pus was drawn out. Pleural fluid analysis presented White blood cell 5,200/mm3, and neutrophil-dominant with 60% of neutrophil. In an effort to attain a diagnosis, a video-assisted thoracoscopy procedure was performed with pleural drainage and biopsies. Active chronic granulomatous pleuritis was found through pleural biopsies. He was responsive to treatment and received 6 months of anti-TB therapy with complete clinical resolution. If the clinical picture is in confusion, pleural biopsy is occasionally indicated to diagnose TB pleuritis.
        14.
        2018.04 KCI 등재 SCOPUS 서비스 종료(열람 제한)
        The roots of Rosa multiflora Thunberg have been used in traditional oriental medicine as remedies for rheumatic arthralgia and scabies. In this study, the anti-fungal, anti-oxidant, and anti-inflammatory activities of a supercritical extract of Rosa multiflora root were investigated in vitro. To investigate the anti-oxidant and anti-inflammatory effects of the supercritical extract, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS) radical scavenging activity, and the inhibition of nitric oxide production in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells were examined, respectively. In addition, the anti-fungal activities of the extract were assessed. The results showed a concentration-dependent, increase in ABTS radical scavenging activity. The supercritical fluid extracts of Rosa multiflora root exhibited low toxicity to RAW 264.7 cells at 100 μg/mL the highest concentration tested. Cells stimulated with LPS produced more nitric oxide than normal control cells; however, cells treated with the supercritical fluid extract decreased this production in a concentration-dependent manner. Finally, the supercritical fluid extracts showed significant anti-fungal activity. These results suggest that extracts of the roots of Rosa multiflora might be used to develop potent anti-fungal, anti-oxidant, and anti-inflammatory agents, and may be useful as ingredients for related new functional cosmetic materials.
        15.
        2016.12 서비스 종료(열람 제한)
        The study aimed to evaluate the usability of sterile bag collection (SBC) urinalysis and urine culture for diagnosing urinary tract infections (UTI). Urine culture is key for diagnosing UTI, and transurethral catheterization (TUC) or suprapubic aspiration is recommended for non-toilet-trained children. Although urine testing using SBC is non-invasive and easy, UTI can be diagnosed only if other criteria including clinical symptoms and positive urinalysis results are met. This study included 228 infants who were hospitalized for unexplained fever from October 2015 to June 2016. TUC culture, SBC urinalysis, and urine culture were performed for all patients. UTI was diagnosed when the TUC culture results met the criterion of ≥104 colony-forming units (CFU)/mL. When UTI diagnosis was made based on SBC urine colony counts ≥105 CFU/mL, the false-positive and false-negative rates were 6.3% and 70.0%, respectively. When the criterion was set as ≥104 CFU/mL, they were 23.7% and 30.0%, respectively. When both the criteria of ≥105 CFU/mL and positive urinalysis results were met, the false-positive rate was 2.4%, and the false-negative rate was 80%. Our results suggest that diagnosing UTI using SBC urinalysis and urine culture is not useful in infants with unexplained fever.
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