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      • KCI등재

        Morphological and Molecular Characterization of Lymnaeid Snails and Their Potential Role in Transmission of Fasciola spp. in Vietnam

        Bui Thi Dung,Pham Ngoc Doanh,Dang Tat The,Ho Thi Loan,Bertrand Losson,Yannick Caron 대한기생충학열대의학회 2013 The Korean Journal of Parasitology Vol.51 No.6

        Freshwater snails of the family Lymnaeidae play an important role in the transmission of fascioliasis worldwide. In Vietnam, 2 common lymnaeid species, Lymnaea swinhoei and Lymnaea viridis, can be recognized on the basis of morphology, and a third species, Lymnaea sp., is known to exist. Recent studies have raised controversy about their role in transmission of Fasciola spp. because of confusion in identification of the snail hosts. The aim of this study is, therefore, to clarify the identities of lymnaeid snails in Vietnam by a combination of morphological and molecular approaches. The molecular analyses using the second internal transcribed spacer (ITS2) of the nuclear ribosomal DNA clearly showed that lymnaeids in Vietnam include 3 species, Austropeplea viridis (morphologically identified as L. viridis), Radix auricularia (morphologically identified as L. swinhoei) and Radix rubiginosa (morphologically identified as Lymnaea sp.). R. rubiginosa is a new record for Vietnam. Among them, only A. viridis was found to be infected with Fasciola spp. These results provide a new insight into lymnaeid snails in Vietnam. Identification of lymnaeid snails in Vietnam and their role in the liver fluke transmission should be further investigated.

      • KCI등재

        Determinants of Implementation of Enterprise Resource Planning System: A Case Study in Vietnam

        Xuan Hiep NGUYEN,Thi Cam Loan NGUYEN,Xuan Dao MAI,Thi To Loan BUI,Thi Tra Giang TRAN,Thuy Trinh HO,Thi Huyen NGUYEN 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.4

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.

        Under the pressure of business competition and effectiveness, more and more organizations in the world are likely to apply modern software such as enterprise resource planning (ERP) which can help them to create better organizing practice, better managing capabilities of administrators, and better operations of personnel. In Vietnam, many firms are afraid to install it and the number of firms adopting this software is limited mainly due to the insufficient scientific evidence of the successful implementation of ERP. This study aims to identify and measure the factors influencing the successful implementation of ERP of firms in Vietnam. Qualitative research methodology combined with quantitative research methodology is used. The data are surveyed with 343 administrators of 45 organizations that have successfully deployed ERP in Ha Noi and Ho Chi Minh cities. Of these 19 were excluded from analyses due to unsatisfactory responses, and only 324 were used for statistical processing. The collected data were processed by using the SPSS software. The result of the study shows that there are six factors affecting the successful implementation of ERP of firms in Vietnam, (ranked in descending order of importance), they are top management commitment and support, business process re-engineering, user involvement, project management board, vendor support, and suitability of software and hardware.

      • SCIESCOPUS

        Free-standing Three Dimensional Graphene Incorporated with Gold Nanoparticles as Novel Binder-free Electrochemical Sensor for Enhanced Glucose Detection

        Bui, Quoc Bao,Nguyen, Dang Mao,Nguyen, Thi Mai Loan,Lee, Ku Kwac,Kim, Hong Gun,Ko, Sang Cheol,Jeong, Hun The Korean Electrochemical Society 2018 Journal of electrochemical science and technology Vol.9 No.3

        The electrochemical sensing performance of metal-graphene hybrid based sensor may be significantly decreased due to the dissolution and aggregation of metal catalyst during operation. For the first time, we developed a novel large-area high quality three dimensional graphene foam-incorporated gold nanoparticles (3D-GF@Au) via chemical vapor deposition method and employed as free-standing electrocatalysis for non-enzymatic electrochemical glucose detection. 3D-GF@Au based sensor is capable to detect glucose with a wide linear detection range of $2.5{\mu}M$ to 11.6 mM, remarkable low detection limit of $1{\mu}M$, high selectivity, and good stability. This was resulted from enhanced electrochemical active sites and charge transfer possibility due to the stable and uniform distribution of Au NPs along with the enhanced interactions between Au and GF. The obtained results indicated that 3D-GF@Au hybrid can be expected as a high quality candidate for non-enzymatic glucose sensor application.

      • KCI등재

        Natural radioactivity level in fly ash samples and radiological hazard at the landfill area of the coal-fired power plant complex, Vietnam

        Truong Thi Hong Loan,Vu Ngoc Ba,Bui Ngoc Thien 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.4

        In this study, natural radioactivity concentrations and dosimetric values of fly ash samples were evaluated for the landfill area of the coal-fired power plant (CFPP) complex at Binh Thuan, Vietnam. Theaverage activity concentrations of 238U, 226Ra, 232Th and 40K were 93, 77, 92 and 938 Bq kg 1, respectively. The average results for radon dose, indoor external, internal, and total effective dose equivalent (TEDE)were 5.27, 1.22, 0.16, and 6.65 mSv y 1, respectively. The average emanation fraction for fly ash were0.028. The excess lifetime cancer risks (ELCR) were recorded as 20.30 10 3, 4.26 10 3, 0.62 10 3, and25.61 10 3 for radon, indoor, outdoor exposures, and total ELCR, respectively. The results indicated thatthe cover of shielding materials above the landfill area significantly decreased the gamma radiation fromthe ash and slag in the ascending order: Zeolite < PVC < Soil < Concrete. Total dose of all radionuclides inthe landfill site reached its peak at 19.8 years. The obtained data are useful for evaluation of radiationsafety when fly ash is used for building material as well as the radiation risk and the overload of thelandfill area from operation of these plants for population and workers.

      • SCIESCOPUSKCI등재

        Effects of element composition in soil samples on the efficiencies of gamma energy peaks evaluated by the MCNP5 code

        Ba, Vu Ngoc,Thien, Bui Ngoc,Loan, Truong Thi Hong Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.1

        In this work, self-absorption correction factor related to the variation of the composition and the density of soil samples were evaluated using the p-type HPGe detector. The validated MCNP5 simulation model of this detector was used to evaluate its Full Energy Peak Efficiency (FEPE) under the variation of the composition and the density of the analysed samples. The results indicates that FEPE calculation of low gamma ray is affected by the composition and the density of soil samples. The self-absorption correction factors for different gamma-ray energies which was fitted as a function of FEPEs via density and energy and fitting parameters as polynomial function for the logarithm neper of gamma ray energy help to calculate quickly the detection efficiency of detector. Factor Analysis for the influence of the element composition in analysed samples on the FEPE indicates the FEPE distribution changes from non-metal to metal groups when the gamma ray energy increases from 92 keV to 238 keV. At energies above 238 keV, the FEPE primarily depends only on the metal elements and is significantly affected by aluminium and silicon composition in soil samples.

      • KCI등재

        Effects of element composition in soil samples on the effi ciencies of gamma energy peaks evaluated by the MCNP5 code

        Vu Ngoc Ba,Bui Ngoc Thien,Truong Thi Hong Loan 한국원자력학회 2021 Nuclear Engineering and Technology Vol.53 No.1

        In this work, self-absorption correction factor related to the variation of the composition and the densityof soil samples were evaluated using the p-type HPGe detector. The validated MCNP5 simulation modelof this detector was used to evaluate its Full Energy Peak Efficiency (FEPE) under the variation of thecomposition and the density of the analysed samples. The results indicates that FEPE calculation of lowgamma ray is affected by the composition and the density of soil samples. The self-absorption correctionfactors for different gamma-ray energies which was fitted as a function of FEPEs via density and energyand fitting parameters as polynomial function for the logarithm neper of gamma ray energy help tocalculate quickly the detection efficiency of detector. Factor Analysis for the influence of the elementcomposition in analysed samples on the FEPE indicates the FEPE distribution changes from non-metal tometal groups when the gamma ray energy increases from 92 keV to 238 keV. At energies above 238 keV,the FEPE primarily depends only on the metal elements and is significantly affected by aluminium andsilicon composition in soil samples.

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