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    Wyświetlanie 1-4 z 4
    Tytuł:
    Gas Hydrate Detection Based on High Resolution Seismic Data in the Southeastern Offshore of Vietnam
    Autorzy:
    Mai, Thanh Tan
    Mai, Thanh Ha
    Nguyen, Quoc Huy
    Nguyen, Nhu Trung
    Powiązania:
    https://bibliotekanauki.pl/articles/27323248.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    gas hydrate
    high resolution seismic
    Gas Hydrate Stability Zones/GHSZ
    Bottom Simulated Reflector/BSR
    gaz
    sejsmika
    hydratacja
    Opis:
    Gas hydrates are the accumulations of methane (natural gas) trapped in ice-like structures with water. Gas hydrates represent an immense energy resource underlying large portions of the world’s marine continental shelves. Vietnam has a large continental shelf area, in the deep water zone with suitable low temperatures and high pressure, which is suitable for the formation and existence of potential energy source of Gas Hydrate (GH). The application of High-Resolution Seismic method (HRS) plays an important role in exploring for Gas Hydrate. The enhancement of HRS research such as optimal short - reception conditions and advanced data processing suitable for Gas Hydrate in shallow layers below the seafloor, allows for determining the geological factors related to Gas Hydrate’s existence in the deep water area. Advancements in data processing technology, such as noise filters (Radon, F-K, SRMA, Tau-P..), seismic attributes analysis, seismic migration, AVO, seismic inversion, pre-stack seismic data and AI technology … allow to identify of the signs of Gas Hydrate presence, such as Bottom Simulated Reflector (BSR), Gas Hydrate Stability Zone (GHSZ), Pockmark, Chimney, etc. This paper presents some of the results obtained from applying High-Resolution Seismic method to predict the distribution of Gas hydrate in the Southeastern offshore of Vietnam.
    Źródło:
    Inżynieria Mineralna; 2023, 2; 137--142
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Social capital and digital transformation of startups in Vietnam during the COVID-19 pandemic: the mediating role of human capital and access to resources
    Autorzy:
    Nguyen, Thi Thuy Quynh
    Ghi, Tran Nha
    Nguyen, Tan Trung
    Powiązania:
    https://bibliotekanauki.pl/articles/27315592.pdf
    Data publikacji:
    2023
    Wydawca:
    STE GROUP
    Tematy:
    access to resources
    digital transformation
    human capital
    social capital
    Opis:
    Based on social network theory, the study explained the digital transformation process of startups in Vietnam during the outbreak of the COVID-19 pandemic. The study examined the relationship between social capital, human capital, access to resources, and digital transformation of startups in Vietnam. The study used Partial Least Squares - Structural Equation Modelling (PLS-SEM) with a sample size of 230 startups managers. The results show that there are positive and statistically significant relationships between social capital, human capital, access to resources, and digital transformation. The results also reveal the partial mediating roles of access to resources and human capital in the relationship between social capital and digital transformation. The results proposed some managerial implications for startups managers in building relationship networks with stakeholders such as government agencies and business partners (customers, competitors, suppliers, and providers of digital platform services). Through managers' social capital, accessible resources and the improvement of human capital have accelerated digital transformation for startups to escape the crisis of the COVID-19 pandemic. Finally, the study presented some limitations and directions for further research.
    Źródło:
    Management Systems in Production Engineering; 2023, 1 (31); 33--42
    2299-0461
    Pojawia się w:
    Management Systems in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Human capital, digital transformation, and firm performance of startups in Vietnam
    Autorzy:
    Ghi, Tran Nha
    Thu, Nguyen Quang
    Huan, Ngo Quang
    Trung, Nguyen Tan
    Powiązania:
    https://bibliotekanauki.pl/articles/2105388.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Ekonomii i Zarządzania
    Tematy:
    human capital
    digital transformation
    firm performance
    kapitał Ludzki
    transformacja cyfrowa
    wydajność firm
    Opis:
    Based on social capital theory, the study explained the digital transformation process of startups in Vietnam. The primary object of this study is to examine the relationship between human capital, digital transformation, and firm performance of startups in Vietnam. The study applied Partial Least Squares Structural Model (PLS-SEM) with a sample size of 230 managers. The results demonstrated the positive relationships between human capital, digital transformation, and firm performance. The study explored digital transformation as a mediation mechanism between human capital and firm performance. The results provided some managerial implications for managers to focus on improving human capital in order to promote digital transformation and firm performance. This is an important strategy to help startups escape the crisis of Covid-19 pandemic. Finally, the study presented some limitations and directions for further research.
    Źródło:
    Management; 2022, 26, 1; 1--18
    1429-9321
    2299-193X
    Pojawia się w:
    Management
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Response surface methodology for optimization studies of hydro-distillation of essential oil from pixie mandarin (Citrus reticulata Blanco) peels
    Autorzy:
    Tan, Phat Dao
    Ngo, Thi Cam Quyen
    Tran, Thi Yen Nhi
    Chi, Cuong Nguyen
    Trung, Thanh Nguyen
    Xuan, Tien Le
    Powiązania:
    https://bibliotekanauki.pl/articles/2081508.pdf
    Data publikacji:
    2021
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Hydro-distillation
    pixie mandarin oil (Citrus reticulata Blanco)
    RSM
    GC-MS
    Opis:
    Essential oil extraction technique from mandarin pixie peels by hydro-distillation is optimized by respon-se surface methodology (RSM). Mathematical techniques were used in experimental design to evaluate the impacts of factors that affect the extraction process and improve the yield of the extraction process. A central mixed design based on infl uencing variables such as water ratio (3–5 mL/g), temperature (110–130° C) and extraction time (90–150 min) was adopted with essential oil yield as the target func-tion. Correlation analysis of the mathematical regression model showed that the quadratic polynomial model can be used to optimize hydro-distillation of pixie mandarin oil. The results showed that under the optimum extraction conditions, the highest quantity of essential oils was achieved (7.28 mL/100 g materials). In terms of statistical analysis, the signifi cance levels (p-value <0.05) of the model showed that the experimental results had a good impact between factors. The coeffi cient of determination indicating the match between the experimental value and the predicted value of the model was high (R2>0.9). The chemical composition of the essential oil was analyzed by Gas Chromatography-Mass Spectrometry, revealing the dominance of limonene content (97.667%), which implies that the essential oil of pixie mandarin could be an alternative source of limonene.
    Źródło:
    Polish Journal of Chemical Technology; 2021, 23, 4; 26-34
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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