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High sensitivity determination of iridium contents in ultra-basic rocks by INAA with coincidence gamma-ray detection

  • Ebihara, Mitsuru;Shirai, Naoki;Kuwayama, Jin;Toh, Yosuke
    • Nuclear Engineering and Technology
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    • v.54 no.2
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    • pp.423-428
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    • 2022
  • Very low contents (in the range of 10-9 g/g) of Ir in mantle-derived rock samples (komatiites) were non-destructively determined by INAA coupled with coincidence gamma-ray spectrometry using 16 Ge detectors. Aliquots of the same samples were analyzed by NiS fire-assay ICP-MS for Ir and other platinum group elements. Because the INAA procedure used in this study is non-destructive and is almost free from spectral interference in gamma-ray spectrometry, the INAA values of Ir contents obtained in this study can be highly reliable. Iridium values obtained by ICP-MS were consistent with the INAA values, implying that the ICP-MS values of Ir obtained in this study are equally reliable. Under the present experimental conditions, detection limits were estimated to be 1 pg/g, which corresponds to 0.1 pg for a sample mass of 0.1 g. These levels can be even lowered by an order of magnitude, if necessary, which cannot be achieved by ICP-MS carried out in this study.

Analysis of Visual Attention on Visual Elements of Ramen Package Design using Eye-Tracking Device (시선추적장치를 활용한 라면 패키지 디자인의 시각적 요소에 대한 시각적 주의집중도 분석)

  • Park, Minhee;Kwon, Mahnwoo;Hwang, Mikyung;Kim, Hyeonseong
    • Journal of Korea Multimedia Society
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    • v.25 no.7
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    • pp.945-952
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    • 2022
  • In a market situation full of brands and products, packaging requires a differentiated design that reflects the needs and trends of the times, as well as the characteristics of the product. Therefore, in this study, through literature reviews, market research methods, questionnaire surveys, eye-tracking experiments, etc., we derived related research and current status of ramen package design, and visual expression elements that induce consumers' subjective perception and interest. As a result, the ramen package design was generally simplified and tended to visualize the spicy taste. Second, consumers buy bag ramen once a week on average at a large discount mart, consider the color of the ramen package design as important, and recognize that the aesthetics of the package design can improve quality. Finally, the spicy phrases and ramen illustrations were the first visual elements of the ramen package design, and for the longest time, attention was focused on the brand name.

On the Analysis of ACQ Effect in Serious Game Contents by Listening Type (기능성 게임콘텐츠의 음향 청취방법이 뇌 활성화지수에 미치는 효과)

  • Min, Yong-Sik;Yoo, Hunter
    • The Journal of the Acoustical Society of Korea
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    • v.29 no.4
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    • pp.237-242
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    • 2010
  • To do an experimental analysis in this paper, we divided two non-equivalent control groups, such as pre and post test groups for difference listening types by serious game contents. From these test groups, we can achieve the most ability of its activity quotient (ACQ) effect is a phonic type and the next one is an aural type. The purpose of this paper is focused on the quantitative analysis of the human's brain quotient (BQ) derived from serious educational game contents.

Ginseng root-derived exosome-like nanoparticles protect skin from UV irradiation and oxidative stress by suppressing activator protein-1 signaling and limiting the generation of reactive oxygen species

  • Wooram Choi;Jeong Hun Cho;Sang Hee Park;Dong Seon Kim;Hwa Pyoung Lee;Donghyun Kim;Hyun Soo Kim;Ji Hye Kim;Jae Youl Cho
    • Journal of Ginseng Research
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    • v.48 no.2
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    • pp.211-219
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    • 2024
  • Background: Recently, plant-derived exosome-like nanoparticles (PDENs) have been isolated, and active research was focusing on understanding their properties and functions. In this study, the characteristics and molecular properties of ginseng root-derived exosome-like nanoparticles (GrDENs) were examined in terms of skin protection. Methods: HPLC-MS protocols were used to analyze the ginsenoside contents in GrDENs. To investigate the beneficial effect of GrDENs on skin, HaCaT cells were pre-treated with GrDENs (0-2 × 109 particles/mL), and followed by UVB irradiation or H2O2 exposure. In addition, the antioxidant activity of GrDENs was measured using a fluorescence microscope or flow cytometry. Finally, molecular mechanisms were examined with immunoblotting analysis. Results: GrDENs contained detectable levels of ginsenosides (Re, Rg1, Rb1, Rf, Rg2 (S), Gyp17, Rd, C-Mc1, C-O, and F2). In UVB-irradiated HaCaT cells, GrDENs protected cells from death and reduced ROS production. GrDENs downregulated the mRNA expression of proapoptotic genes, including BAX, caspase-1, -3, -6, -7, and -8 and the ratio of cleaved caspase-8, -9, and -3 in a dose-dependent manner. In addition, GrDENs reduced the mRNA levels of aging-related genes (MMP2 and 3), proinflammatory genes (COX-2 and IL-6), and cellular senescence biomarker p21, possibly by suppressing activator protein-1 signaling. Conclusions: This study demonstrates the protective effects of GrDENs against skin damage caused by UV and oxidative stress, providing new insights into beneficial uses of ginseng. In particular, our results suggest GrDENs as a potential active ingredient in cosmeceuticals to promote skin health.

A Development of Management System for Publication and Operation of Clinical Contents Model's Outcomes (임상콘텐츠모형 산출물 홍보와 운영을 위한 관리시스템 개발)

  • Yun, Ji-Hyun;Ahn, Sun-Ju;Lee, Bo-Hye;So, Hye-Jin
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.9
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    • pp.3398-3405
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    • 2010
  • In this paper we developed a CCM Manager which is a management system to support efficient development, publication and promotion of Clinical Contents Model(CCM)'s outcomes. We derived the functions of manager and user from the analysis of work process from development of CCM to management and publication, designed the database based on CCM architecture, and developed web-based system for each user to easily access and search the contents. CCM Manager supports to share the results between model developers well, distribute and promote the outcomes of model type to general users without manager's manual packaging and publishing it. This paper shows superiority compared with other clinical information model management system in aspects of providing multiple search functions, visual model browsing methods and management functions. The proposed CCM Manager is currently used in process of CCM development, and the analysis of its efficiency with the results will be made in the future.

Effects of L-arginine on Endothelium Derived Factors and Cyclic Nucleotides in Broilers under Low Ambient Temperature

  • Han, Bo;Yoon, Soonseek;Han, Hongryul;Wang, Xiaolong
    • Asian-Australasian Journal of Animal Sciences
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    • v.17 no.11
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    • pp.1570-1574
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    • 2004
  • A flock of AA breed chickens were reared in peterstme brood-vait chamber and were provided with high energy pelleted feed. At 14 d of age, a total of 350 birds were randomly divided into 3 groups as follows: 100 birds were exposed to normal ambient temperature of 20$^{\circ}C$ for control group; 150 birds were exposed to lower ambient temperature of 11$^{\circ}C$ to induce ascites (treatment I); and another group of 100 birds were exposed to lower ambient temperature of 11$^{\circ}C$ and fed diet containing 1% L-arginine for ascitic prophylactic treatment (treatment II). Samples were collected from blood and abdominal fluid of chicken at 3, 4, 5, 6 and 7 wk of age subsequently, to analysis the contents of plasma endothelin (ET-1), angiotensin II (Ang II), cyclic adenosine monophosphate (cAMP), cyclic guanosine monophosphate (cGMP). The results indicated that the contents of cAMP, cGMP, and Ang II in reatment I and ascitic broilers were higher than the corresponding control group (p<0.01, p<0.05), ET-1 of preascitic broilers were control group (p<0.05), while there was an insignificant difference with later ascitic broilers. The contents of cAMP and cGMP in treatment II were higher than the treatment I and control groups (p<0.01, p<0.05), whereas, the contents of Ang II were gradually decreased compared to the control group (p<0.05), the contents of ET-1 were insignificantly different. On further analysis, the increased plasma Ang II at low ambient temperature condition in broilers made endothelium cell secretion of increased ET-1, cAMP, cGMP and decreased NO. Therefore, low temperature accelerated ascites syndrome in broilers. Supplemently L-arginine can decrease ET-1, and increase cAMP and cGMP. It is concluded that cAMP mediated in broilers pulmonary hypertension syndrome.

A Model to Predict Popularity of Internet Posts on Internet Forum Sites (인터넷 토론 게시판의 게시물 인기도 예측 모델)

  • Lee, Yun-Jung;Jung, In-Jun;Woo, Gyun
    • The KIPS Transactions:PartD
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    • v.19D no.1
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    • pp.113-120
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    • 2012
  • Today, Internet users can easily create and share the digital contents with others through various online content sharing services such as YouTube. So, many portal sites are flooded with lots of user created contents (UCC) in various media such as texts and videos. Estimating popularity of UCC is a crucial concern to both users and the site administrators. This paper proposes a method to predict the popularity of Internet articles, a kind of UCC, using the dynamics of the online contents themselves. To analyze the dynamics, we regarded the access counts of Internet posts as the popularity of them and analyzed the variation of the access counts. We derived a model to predict the popularity of a post represented by the time series of access counts, which is based on an exponential function. According to the experimental results, the difference between the actual access counts and the predicted ones is not more than 10 for 20,532 posts, which cover about 90.7% of the test set.

Implementation of Image Block Linked Contents to Improve Children's Visual Perception and Cognitive Function (유아의 시지각 인지기능 개선을 위한 이미지 블록 연동형 콘텐츠 구성과 구현)

  • Kwak, Chang-Sub;Lee, Young-Soon
    • The Journal of the Korea Contents Association
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    • v.22 no.9
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    • pp.76-84
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    • 2022
  • In this paper, in order to compose the visual perception cognitive function training content that can be linked with the IPUZZLE image block, an interactive content device that utilizes photos and videos of smartphones. Four areas of visual memory, visual continuity, spatial relationship, and visual discrimination were derived and the content operation, application method, and scenario were written. It was intended to continuously give and induce children's desire to participate in training by designing the content image and developing the existing learning terrain visual and perceptual cognitive function training materials in the form of mobile mini-games. Experiential activities were conducted for general children and their guardians using the developed contents, and the results were found to be significant in terms of concentration, effect, and effect compared to basic puzzle toys. It is expected that this thesis will be a meaningful data for the study of cognitive function improvement activities based on digital toys and contents.

Heritabilities, Genetic Correlations and Path-coefficient Analysis of Some Economic Characters among Dihaploids from Anther Cultured (Nicotiana tabaccum L.) (담배 약배양에 의한 반수체배가계통의 특성에 관한 연구 - 유전력, 유전상관, 경로계수를 중심으로 -)

  • Jin, J.E.;Chang, K.Y.
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.27 no.1
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    • pp.87-93
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    • 1982
  • Dihaploid lines derived from the another of the $F_1$ of single cross, SC72 $\times$ Hicks (Nicotiana tabacum L.) were estimated the variation, heritablities, genetic correlations and path-co-efficients on agronomic characters and chemical compositions. Dinaploids exhibited reduced vigor and growth when comparecd with the mid-parent value but had increased nicotine contents, and the range of dihaploids characters were deviated more than that of their parents. Heritabilities of days to flowering, leaves per plant, nicotine. contents, leaf size and plant height appeared high value, and the yield, value per kg. and reducing sugar contents were low. There were positive genetic correlations between yield, and value per kg., leaf width, leaves per plant and reducing sugar contents and negative genetic correlations appeared between nicotine contents and the other characters except for index of leaf shape. Path-coefficient analysis of genotypic correlation coefficients showed that leaves per plant and leaf width lave a high direct effect, and plant height and days to flowering have a high indirect effect on yield, respectively.

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Evaluation of Heavy Metal Contents in the Floras Derived from Granite and Coal Bearing Shale Areas in Keumsan (금산의 화강암 및 함탄질 셰일 지역 토양내 식물체의 중금속 함량 특성)

  • Song Suck-hwan;Kang Young-Rib;Kim Il-Chool
    • Korean Journal of Plant Resources
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    • v.18 no.2
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    • pp.251-259
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    • 2005
  • Three different floras(M. sinsinsis, A. vulgaris, Robinia pseudo-acacia) were collected from the granite(GR) and coal bearing shale area(CB) and analysed for their heavy metal elements with the representative soils. Regardless of the flora species, the CB were high in average contents. Among the correlation relationships, the CB were more distinctive than the GR, and the A. vulgaris showed higher correlations than the M. sinsinsis. In the same soils, the A. vutgaris showed high contents than the M. sinsinsis and Robinia pseudo-acacia, and the M. sinsinsis were high relative to the Robinia pseudo-acacia. In the comparisons of the flora, root parts were high in most of the elements except for Zn. In the soils, the CB were high in most of elements while As and Mo showed different contents between the GR and CB. In the comparison between soil and flora, soils of the GR were high in the V and Sc contents and low in Zn and Cu, while those of the CR were high in the Cr, V and Sc contents, and low in the Zn contents, Comparing with the soil contents, the M, sinsinsis in the GR were similar to Co and V contents while, in the CB, the M. sinsinsis were similar to the Ni, Cr, Co, Zn, Mo contents, and the Robinia pseudo-acacia were similar to the Ni, Zn, Cu contents. Overall results suggested that the M. sinsinsis and A. vulgaris should be eligible for the bioremediation of the soils polluted by heavy metal such as the CB.