Bài trích Báo - Tạp chí Khoa học Trường Đại học Hoa Sen (HSU)
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Item Leadership styles, internal employer branding and organizational identification: insights from Vietnam(Emerald Insight, 2025-12-02) An Hoang Kim Vo; Loan Ngoc Tuong Pham; Duong Tuan Nguyen; Minh Hien HaGrounded in social identity theory (SIT), this study investigates the mediating role of internal employer branding (IEB) in shaping the relationships between transformational leadership (TL) and organizational identification (OI) as well as autocratic leadership (AL) and OI at a Vietnamese public university.Item Spatial Conceptualization in Vietnamese: A Contrastive Analysis of ‘Ra’ and ‘Vào’ and Their English Equivalents(Faculty of Foreign Languages – International Cultures, Hoa Sen University, Ho Chi Minh City, Vietnam, 2025-09-05) Tran Van DuongThis study explores the cognitive mechanisms underlying spatial conceptualization in Vietnamese, focusing on the directional markers ra (‘out’) and vào (‘into’) in contrast with their English equivalents. Using a cognitive linguistic framework and bilingual corpus analysis, the study reveals that, unlike English, which primarily employs goal-oriented prepositions, Vietnamese conceptualizes spatial relations through containment schemas and hierarchical reference frames. Vietnamese conceptualizes motion based on interior/exterior contrasts, narrow/wide spaces, and regional axes (e.g., vào Nam ‘into the South,’ ra Bắc ‘out to the North’), while English focuses on endpoints with prepositions like into or to. The findings highlight key differences in spatial cognition, particularly in directional conceptualization and sociocultural influences. This study contributes to cognitive linguistics, cross-linguistic spatial representation, and translation studies, offering insights into how language-specific structures shape conceptualization and influence meaning construction across different linguistic systems.Item Une internationalisation proactive et responsable(Éditions des archives contemporaines, 2014) Bui, Tran Phuong; Pham, Quoc LocAprès avoir hésité entre plusieurs approches, nous avons finalement choisi celle d’un entretien pour rendre compte du parcours de l’Université Hoa Sen à Hô Chi Minh Ville. Ce parcours constitue un exemple atypique dans l’ensemble de l’évolution de l’enseignement supérieur au Viêt Nam. Il représente cependant une initiative origi- nale et proactive de la part d’une équipe universitaire vietnamienne qui a délibéré- ment fait le choix d’une internationalisation responsable de l’enseignement supérieur, une tentative de préserver l’authenticité de l’entreprise universitaire et de ses valeurs humanistes, tout en l’adaptant à un environnement national et international où les tensions sont permanentes entre la commercialisation et le développement du savoir, entre les demandes croissantes des masses et les moyens et ressources limités des États et institutions, entre la tendance à l’uniformisation globalisante et la préservation des identités culturelles en pleine mutation et interpénétration, entre la nostalgie conser- vatrice de la planification centralisée et le dynamisme des initiatives à la base, entre les besoins impérieux de coopérations et partenariats équitables et les rapports de force encore par trop inégaux..., enfin entre la soumission aux lois du marché et les possibilités toujours renouvelées de la créativité intellectuelle. Voici donc une interview de Bui Trân Phuong, présidente de l’Université Hoa Sen. Les questions sont formulées par Pham Quôc Lôc.Item Metabolic Network Reconstruction and Their Topological Analysis(Springer Science+Business Media New York, 2014) Beurton-Aimar, Marie; Nguyen, Vu Ngoc Tung; Colombie, SophieThis chapter focuses on the way to build a metabolic network and how to analyze its structure. The first part of this chapter describes the methods of the network model reconstruction from biochemical data found in specialized databases and/or literature. The second part deals with metabolic pathway analysis as a useful tool for better understanding the complex architecture of intracellular metabolism. The graph analysis and the stoichiometric network analysis are important approaches for understanding the network topology and consequently the function of metabolic networks. Among the methods presented, the Elementary Flux Modes analysis will be more detailed. Finally, we illustrate in this chapter an example of network reconstruction from heterotrophic plant cells metabolism and its topological analysis leading to a huge number of Elementary Flux Modes.Item Business-IT Alignment: A practical research approach(Elservier, 2014) Charoensuk, Suwatana; Wongsurawat, Winai; Do, Ba KhangThe purpose of this study is to empirically investigate the impact of Business-Information Technology Alignment, or BIA, on organizations and to revisit the BIA antecedents by using data from hotel sector of the service industry. The research model was developed based on the literature and inputs from the hotel industry and IT experts, using the Structural Equation Modeling (SEM) technique in data analysis, and data from phone interviews that were conducted with both business and IT personnel from 3 to 5 star hotels in Thailand. We found that Business-IT Alignment does have a positive relationship with organizational performance. Shared domain knowledge was found to have the highest relationship with Business- IT Alignment while IT management sophistication had the least impact, but in a negative direction, while organizational size was found to be a moderator. Other BIA antecedents were effective communication, IT operational and implementation success, and planning sophistication. This study developed a model that integrates the alignment between the strategic and operational levels which offers a holistic view of BIA, different from previous studies that considered only one or the other level. Secondly, we cross verify the antecedents from the literature and actual practice by interviewing experts in the industry. Finally, we revisited measurements and relationships among the constructs so that the model is up-to-date and applicable to the current business environment.Item Public infrastructure investments and regional specialization: empirical evidence from Greece(The Author(s), 2014) Tsekeris, Theodore; Vogiatzoglou, KlimisThe paper investigates the determinants of regional specialization for six broad sectors of economic activity in Greece, focusing on the effect of various types of public infrastructure investment. A system-wide model of panel regression equations is employed to recognize the significance of spatially fixed effects and that the covariates of specialization may vary with each sector. The role of market access on the specialization of manufacturing and main service activities is found to be conflicting with that of regional public investment, especially with regard to road expenditure. The results signify the potential of policy-makers to affect specialization patterns through reallocation of regional investment shares.Item Cassava root supply chain in nakhornrnratchasima province: Challenges and Opportunities for Local Starch MillsSuvittawatt, Adisak; Soni, Peeyush; Do, Ba KhangThe demand of cassava roots is rapidly growing due to its use in both starch extraction and ethanol production. Not only the demand is high but also the competition for crop’s planting areas is also severe. Local starch mills have changed the way they procure cassava. They used to purchase cassava by volume, but now they focus more on the per cent content of extractable starch the cassava contains. Usually, it takes about 4.4 kg of cassava to produce one kg of starch, as long as the cassava contains at least 25% starch. Starch content is at its highest value when cassava is freshly harvested, so procuring the root directly from farmers offers higher starch content than buying from brokers. At the moment, the quality of cassava procured from both farmers and brokers is poor, which makes cassava production inefficient and raises starch production cost. The starch mills realize the importance of procuring quality cassava from its suppliers, since this is a proven strategy towards reducing cost of starch production. Improper planning in cassava procurement causes significant loss in the starch content - at the farmer field while waiting to harvest in anticipatory higher selling price, and at the mill warehouses where it is excessively stocked in the fear of inconsistent supply during off season. This results in loss of potential starch content, dissatisfying return to farmers, and inconsistent supply of raw materials to meet yearlong demand of mills. Proper planning in procurement process would therefore improve production efficiency and decrease production costs; simultaneously will also maintain consistent supply of raw material to the starch mills. To identify the factors influencing production and trading decision of farmers, this study considered the case of a leading starch mill (Corn Product Thailand, Nakornrachasima, Thailand) and its associated farmers and middleman in its procurement process.Item Item Optical bistability based on Fano resonances in single-and double-layer nonlinear slab waveguide gratingsNgo, Quang Minh; Le, Quang Khai; Vu, Dinh Lam; Pham, Van HoiItem Economic, social and environmental disclosure, a theoretical framework and its application in Vietnam(2014) TRAN VU, Viet Ha; MAI, Anh; DOAN, Cam Tu; PIGÉ, BenoîtThis study focuses on the appraisal of firms’ performance and on its representation and reporting. Using interviews and inquiries in firms operating in the cement industry in Vietnam, two points are investigated. First, whether firms’ top execu- tives consider that firms’ sustainable performance may include economic, social or environmental performance that is not integrated in financial statements. The theo- retical framework is the stakeholder theory complemented with the institutional theory. Second, whether economic, social and environmental performance should be disclosed to answer the expectations of the various stakeholders. Therefore, our research contributes to corporate focusing on reporting dedi-cated to all the stakeholders.Item Calculation of intermolecular potentials for H₂–H₂ and H₂–O₂ dimers ab initio and prediction of second virial coefficients(Elservier, 2015) Pham, Van Tat; Deiters, Ulrich K.The intermolecular interaction potentials of the dimers H₂–H₂ and H₂–O₂ were calculated from quan-tum mechanics, using coupled-cluster theory CCSD(T) and correlation-consistent basis sets aug- cc-pVmZ (m = 2, 3); the results were extrapolated to the basis set limit aug-cc-pV23Z. The interaction energies were corrected for the basis set superposition error with the counterpoise scheme. For comparison also Møller–Plesset perturbation theory (at levels 2 to 4) with the basis sets aug-cc-pVTZ were considered, but the results proved inferior. The quantum mechanical results were used to construct analytical pair potential functions. From these functions the second virial coefficients of hydrogen and the cross virial coefficients of the hydrogen–oxygen system were obtained by integration; in both cases corrections for quantum effects were included. The results agree well with experimental data, if available, or with empirical correlations.Item The effects of ePortfolio-based learning model on student self- regulated learning(The Author(s), 2015) Nguyen, Trung Lap; Ikeda, MitsuruSelf-regulated learners are aware of their knowledge and skills and proactive in learning. They view learning as a controllable process and accept more responsibility for the results of this process. The research described in this article proposes, implements, and evaluates an ePortfolio-based self-regulated learning model. An ePortfolio system was developed based on self-regulated learning theories. This ePortfolio system was used in designing a learning model for fostering self-regulated learning in higher education. Two surveys were conducted with the Motivated Strategies for Learning Questionnaire at the beginning and at the end of the courses. The differences in Motivated Strategies for Learning Questionnaire scales between pre-test and post-test, or control group and experimental group were evaluated. The trace data of learning activity were also analyzed to evaluate the effects of the learning model on students’ self-regulated learning. The results show that students implemented self-regulated learning processes, and their intrinsic goal orientation, metacognitive self-regulation, effort regulation, elaboration, rehearsal, and critical thinking improved after applying ePortfolio-based learning model in the courses. In conclusion, the ePortfolio system and the proposed learning model had positive effects on students’ self-regulated learning skills.Item International Production Sharing and Export Growth in the Service Sector (Evidence from India)(2015) Vogiatzoglou, Klimis; Beauty, aesthetic development, young children, socialization, culture, artsInternational production sharing activities have increased substantially in the service sector. India as a host-country has attracted a large amount of those activities and by now holds a significant position in the global service supply chain. This development may have shaped significantly India’s service industry and affected the country’s trade patterns. Therefore, the paper examines the inflow of production sharing activities in the service sector in India, and assesses econometrically the role and quantitative effect on India’s service exports. Our empirical findings indicate that international production sharing had subsequently a decisive impact on the growth of service exports from India to her trade partners.Item Nonlinear nanocircuitry based on quantum tunneling effects(Materials Research Society, 2015) Chen, Pai-Yen; Le, Quang Khai; Alù, Andreacircuit functionalities in the optical regime. So far, these concepts have been mostly limited to linear operations, while many of the relevant operations in integrated circuits require nonlinear responses. In this work, we introduce nonlinear infrared nanocircuit elements exploiting large quantum conductance driven by photon-assisted tunneling and enhanced by hybrid plasmonic nanojunctions. Based on these concepts, we present infrared lumped nanocircuit mixers and switches for second-harmonic generation, and wide-spectrum self-amplitude modulators based on nanorods.Item Numerical investigation of tunable Fano-based optical bistability in coupled nonlinear gratings(Elservier, 2014) Ngo, Quang Minh; Le, Quang Khai; Hoang, ThuTrang; Vu, Dinh Lam; Pham, Van HoiIn this paper, we numerically report the optical bistability based on tunable Fano resonances in photonic structures consisting of two coupled nonlinear slab waveguide gratings facing to each other. Quality factor (Q-factor) and asymmetric factor (q-factor) of Fano resonance of the coupled grating structure can be tuned by changing the gap-distance and horizontal shifted-alignment. The switching intensity not only depends on the Q-factor, but also strongly depends on the q-factor of the resonance. Considering strong coupling coefficients and optimizing the gap-distance between two gratings, the Fano resonance with high Q-factor and optimal q-factor can be excited. It is found that the horizontal shifted-alignment of the system provides high-order resonant mode having higher Q-factor and thus reduces the switching intensity than that of the perfect alignment system. Depending on the wavelengths of operation and q- factors of Fano resonances, the optical bistabilities will provide various switching intensities.Item Nanoplasmonic Enhancement of Molecular Fluorescence: Theory and Numerical Modeling(2014) Le, Quang KhaiSignificant emission enhancement of fluorescent molecules placed in close proximity to metallic nanoparticles has been observed. Recent advances in nanotechnology have enabled the introduction of plasmon-enhanced molecular fluorescence in various applications. Comprehensive theory of the physics behind this enhancement mechanism has also been developed. However, most of the existing analytical tools are applicable mainly for particular nanoparticles in either spherical or ellipsoidal shapes. Since the plasmonic enhancement of molecular fluorescence is dependent on various parameters such as shape, size, and distribution of nearby nanoparticles, it is crucial to have more powerful analysis tools to be able to handle any arbitrary nanoparticles. For this purpose, the 3D finite element method, which is a commonly used technique for arbitrary structures, is implemented and reported in this paper. The emitting molecule is assumed to be an electric dipole point source. The fluorescence enhancement factor is described in term of a local electric fieldenhancement factor and the quantum yield of the system. The model is validated by comparison to the approximate quasistatic model and the exact Mie theory. It provides more accurate results than those of the quasistatic model, which makes it become the powerful numerical approach for investigation of arbitrary nanostructure influence on molecular fluorescence. It is then applied for investigating the emission characteristics of the fluorescent molecule when it is placed in the vicinity of more complicated structures including dimers and chains of coupled nanoparticles. It is found that these coupled nanoparticle configurations provide stronger fluorescence enhancement than the single nanoparticle of the same particle size when the inter-particle gap is small. It is attributed to the higher electric-field enhancement in the inter-particle gap region via strong surface plasmon coupling effects of two neighboring nanoparticles.Item Multiple Fano interferences in a plasmonic metamolecule consisting of asymmetric metallic nanodimers(2015) Le, Quang Khai; Alù, Andrea; Bai, JingWe theoretically explore signatures of plasmonic Fano interferences in a subwavelength plasmonic metamolecule consisting of closely packed asymmetric gold nanodimers, which lead to the possibility of generating multiple Fano resonances in the scattering spectrum. This spectral feature is attributed to the interference between bright and dark plasmonic modes sustained by the constituent nanodimers. The excited Fano dips are highly sensitive in both wavelength and amplitude to geometry and background dielectric medium. The tunability of induced Fano resonances associated with enhanced electric fields from the visible to infrared region provides promising applications, particularly in refractive index sensing, light-trapping, and photon up-convertingItem Enhanced absorption efficiency of ultrathin metamaterial solar absorbers by plasmonic Fano resonance(2015) Le, Quang Khai; Bai, JingWe demonstrate a proof of principle that plasmonic Fano resonance can provide a complementary enhancement mechanism boosting the absorption efficiency of thin metamaterial solar absorbers over a wide angle of incidence under both TE and TM polarizations. Fano resonances are induced in arrays of two asymmetric metallic nanodimers coupled to a metallic layer through an intermediate insulator thin film. The resulting moderate resonant peaks shown in the scattering spectrum are predicted to play a dominant role in light-trapping enhancementItem Calibrated Dielectric Fiber Arrays for Light-Trapping Enhancement in Organic Solar Cells(IEEE Explore, 2015) Le, Khai Q.; Nixon, Matthew; Bai, JingA numerical investigation of an array consisting of SiO2 fibers to generate whispering gallery modes (WGMs) and lensing effects atop an organic solar cell (OSC) to enhance optical absorption efficiency is reported. SiO2 fibers calibrated to generate the optimal WGM resonator (WGMR) and antireflection coating for broadband light account for increases in integrated absorption up to16% when comparedwith its flat-OSC counterpart. The overall absorption, using AM1.5 G (air mass 1.5 global) spectra, yields absorption efficiencies of 60% in an optimal configuration with a cell size of 600 nm and fiber radius of 200 nm. Using fibers like the WGMR and antireflector, it is seen that there is a broadband absorption over all wavelengths, except for 380–400 nm, when using this substrate.Item Surface plasmon-assisted optical switching/bistability at telecommunication wavelengths in nonlinear dielectric gratings(2015) Hoang, Thu Trang; Le, Khai Q.; Ngo, Quang MinhIn this paper, we numerically investigate nonlinear optical responses in dielectric gratings coated by flat metallic surface, where the structural parameters are chosen for wavelengths of operation at the telecom regime. The presented designs show the output light reflection with respect to the incident intensity of increasing, decreasing, and non-monotonic belt-shape functions. Nonlinear optical responses including switching and bistability appeared in the telecom region owing to assistance of surface plasmon resonance excited at the metal/dielectric interface, which enhances the diffraction efficiency and induces the momentum matching for the leaky modes of the dielectric grating. This results in electric intensityeffective refractive index dependence enhancement in the Kerr nonlinear media. Our design and investigation of the linear and nonlinear optical responses will provide a general guideline for a hybrid metallic-dielectric structure-based optical switching/bistability device design.
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