Dalat University Journal of Science / Tạp chí khoa học Đại học Đà Lạt
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UNPACKING SOCIAL INTERACTIONS IN PACKAGE TOURS: A FOCUS ON TOURIST-TO-TOURIST AND TOURIST-TO-TOUR GUIDE INTERACTIONS AND INFLUENCING FACTORS
Get PDFThis study aims to comprehensively understand social interactions on package tours. Using a qualitative approach, combining interviews (n = 33) and field observations (n = 3) administered to Vietnamese package tourists, the study identified ten common forms of social interaction among tourists and eight common forms between tourists and tour guides. The majority of tourist-to-tourist interactions were found to be social-oriented, while most tourist-to-tour guide interactions were service-oriented. The study also found that factors influencing these interactions included tour guide performance, tourist personality, tourist needs, and situational factors on tours. The findings make a significant contribution to the literature on social interactions and offer valuable practical implications for tour marketing and management practitioners, particularly in their efforts to manage social interactions on tours and recovery package tours in the post-Covid era
IMPLEMENTING ETHNIC TOURISM AS A TOOL CONTRIBUTING TO THE DESTINATION COMMUNITY WELL-BEING IN THE CENTRAL HIGHLANDS, VIETNAM
Get PDFDespite being well-recognized as a means of poverty alleviation in poor remote areas, ethnic tourism should not be solely pursued for economic benefits as an end goal for the host community. To achieve sustainability and destination community well-being, it is argued that ethnic tourism can become a tool to improve various types of community capital rather than only economic capital. The main goal of this study is to identify strategies to improve community capital in an ethnic tourism destination. By conducting a community workshop with 34 local tourism stakeholders in the Central Highlands, the study found that the top priority was placed on human capital and political capital. First, local wisdom and genuine characteristics of naivete, honesty, friendliness, and hospitality need to be promoted to attract visitors, while local residents need to be educated and trained to build capacity for improving tourism services and to actively engage in the tourism decision-making process. Second, improvements in political capital were strongly suggested to tackle common barriers to community empowerment and collaboration, tourism organizational structure, local policies, standards, and assessment procedures. This study reaffirms the interrelationship and synergy among types of community capital and proves the value of the destination community well-being approach to ethnic tourism planning and governance. Future research implications are also presented.
HEAVY METALS IN SURFACE SEAWATER AND SEDIMENT FROM THE COAST OF KHANH HOA PROVINCE: LEVELS AND ECOLOGICAL RISK ASSESSMENT
Get PDFContamination by heavy metals in coastal and marine environments is an increasingly serious threat to both marine ecosystems and humans. The numerous marine cultivation and industrial zones along the coast of Khanh Hoa may influence the heavy metal contamination in the seawater and marine sediments. In this study, 36 seawater and 36 marine sediment samples were collected along the coast of Khanh Hoa to evaluate the levels of eight heavy metal elements. The results indicated that heavy metal concentrations in the surface seawater at Khanh Hoa were much lower than the national technical regulatory limits. The comprehensive pollution index of the heavy metals averaged less than 1. Therefore, heavy metal pollution in the seawater along the coast of Khanh Hoa is slight. Among the eight heavy metals (Cd, Co, Cu, Cr, Mn, Ni, Pb, and Zn) analyzed in the sediments, Cu concentration in the sediment at Cam Ranh Bay is much higher than the national technical regulatory limit. Ecological risk assessment of the sediments also indicated a possible combined biological effect of Cu, Pb, and Zn at Cam Ranh. Therefore, heavy metals in the marine environment at Khanh Hoa should be monitored yearly. Decision-makers should consider the Cu content in seafood because bioaccumulation of heavy metals may occur in marine organisms
A VERY LOW BANDGAP LINE-TUNNEL FIELD EFFECT TRANSISTOR WITH CHANNEL-BURIED OXIDE AND LATERALLY DOPED POCKET
Get PDFLow bandgap and line tunneling techniques have demonstrated the most effectiveness in enhancing the on-current of tunnel field-effect transistors (TFETs). This study examines the mechanisms and designs of channel-buried oxide and a laterally doped pocket for a very low bandgap line-TFET. Numerical TCAD simulations show that the channel-buried oxide is needed to prevent off-state lateral tunneling while still maintaining the on-state vertical tunneling. The buried oxide pillar should be high so that the channel is thin, about 10 nm thick, to completely suppress the tunneling leakage. The dopant pocket is required to trigger the line tunneling earlier than the point tunneling to improve the subthreshold swing and on-current. Increasing the pocket concentration or decreasing the pocket thickness both cause an increase not only in the vertical band bending but also in the effective gate-insulator thickness. Because of the trade-off between these two operation parameters, for a given thickness/concentration, there exists an optimal concentration/thickness of the pocket to maximize the on-current. The on-current is optimized using a heavy, thin pocket, for which the band bending is maximized and the effective gate-insulator thickness is minimized. For the fabrication feasibility using existing doping techniques, the pocket concentration and thickness should be 1019 cm-3 and 4 nm, respectively, to maximize the on-current of the InAs line-TFET
THE GROTESQUENESS IN VIETNAMESE FOLK JOKES
Get PDFGrotesqueness exploits laughter, exaggeration, and unusual contrasts between the imaginary and the real, beauty and ugliness, tragedy and comedy. Grotesqueness is prevalent in folk jokes, especially in tales about gluttony, henpecked husbands, and sexual desire. It manifests itself through character type, language, tone, and time frame. Using analytical and synthetic methods and an interdisciplinary approach, the author examines Vietnamese folk jokes to elucidate this viewpoint
THE STONE TOOL-MAKING TECHNIQUES USED BY THE HOABINHIAN INHABITANTS FROM THE LATE PLEISTOCENE TO THE EARLY HOLOCENE: A CASE STUDY OF PIT 3 AT CHO CAVE, HOA BINH PROVINCE
Get PDFThe collection of both shaped and unshaped stone tools discovered at Cho Cave during the 2004 excavation has provided new data on an early system of Hoabinhian archaeological sites in northern Vietnam. However, the attributes of unifacial and bifacial flaking techniques in Vietnam and Southeast Asia remain underexplored. This article, in addition to building upon past research data, applies attribute-based research methods to the stone tool assemblage from Pit 3 to investigate the diversity of stone tool production techniques over time. The research findings indicate that from approximately 24,000 to 20,000 cal. BP, both shaped and unshaped tools coexisted. After 20,000 cal. BP, the group of unshaped tools diminished, while the types of shaped tools exhibited greater diversity. The transition from unifacial to bifacial flaking techniques in the shaped tool group is evident at Cho Cave. In the early Holocene, the evolution from flaking techniques to grinding techniques was also recorded. Thus, this study contributes new insights into the emergence of stone tool-making techniques of Hoabinhian residents from the late Pleistocene to the Holocene in Vietnam and Southeast Asia
NHÂN GIỐNG IN VITRO CÂY NÚC NÁC (OROXYLUM INDICUM (L.) KURZ)
No full textThis study develops a basic micropropagation protocol for Oroxylum indicum, a well-liked plant in Southeast Asia with medicinal properties that have been recognized by various civilizations worldwide for centuries. Seeds were sterilized with 0.1% HgCl2 for 1 minute, yielding an optimal sterilization efficiency of 89.9%. MS medium supplemented with 1.0 mg/l BAP was the most effective medium for shoot initiation, and MS medium supplemented with 0.7 mg/l IBA was the best rooting medium
AN EFFECTIVE APPROACH TO FACE RECOGNITION WITH ARTIFICIAL INTELLIGENCE AND THE INTERNET OF THINGS USING NVIDIA JETSON NANO
Get PDFThis study examines how artificial intelligence (AI) can be incorporated into the Internet of Things (IoT), with a particular focus on using the NVIDIA Jetson Nano as a specialized AI platform. The aim is to boost the functional capabilities of IoT devices, allowing them to independently carry out sophisticated data analysis and decision-making tasks to heighten their efficiency and effectiveness. The paper begins by outlining the motivation for this investigation, then proceeds with a literature review to evaluate the prospective applications, challenges, and benefits of AI in IoT environments. It explores in detail the technical attributes of the NVIDIA Jetson Nano, including its compact design, robust computing power, and the availability of software libraries that facilitate the deployment of AI models on devices with limited resources. A prototype IoT device equipped with the NVIDIA Jetson Nano was developed at Tien Giang University. This device is capable of capturing video and executing AI algorithms for real-time analysis, thereby deriving crucial data for IoT decision-making processes. The outcomes and structure of this prototype exhibit the potential for wider application, particularly in facial recognition technologies. The discussion on this subject extends beyond the confines of this document, indicating ongoing developments and enhancements
ASSESSING SELECT PUBLIC SCHOOLS DISASTER AND RISK REDUCTION MANAGEMENT DURING PANDEMIC RESTRICTION IN THE PHILIPPINES
Get PDFThis study uses a descriptive methodology to assess the implementation of disaster risk reduction and management (DRRM) by selected public schools during the COVID-19 pandemic. Survey data were collected with a two-part questionnaire to construct a demographic profile of the respondents and assess the level of DRRM implementation by the schools in four thematic areas: disaster prevention and mitigation, disaster preparedness, disaster response, and disaster rehabilitation and recovery. Eighty-one teachers from five high schools participated in the survey. The participants were diverse in terms of age, sex, length of service, field of specialization, and level of training on DRRM. The level of DRRM implementation was high in all four thematic areas. Means and standard deviations were 3.06 ± 0.49 for disaster prevention and mitigation, 2.99 ± 0.51 for disaster preparedness, 2.99 ± 0.59 for disaster response, and 2.98 ± 0.49 for disaster rehabilitation and recovery. Overall, the four thematic areas were carefully observed and implemented by the surveyed schools during the pandemic. The schools adhered to the standards prescribed by the national DRRM council and reinforced by order of the Philippine Department of Education. It is highly recommended that schools maximize their implementation in these four areas and create ways to enhance their ability to deal with disasters
RESULTS OF ARCHAEOLOGICAL FIELDWORK IN THE DISTRICTS OF DAK SONG AND DAK MIL, DAK NONG PROVINCE, IN 2018
Get PDFThis study investigates the archaeological potential of Dak Nong Province, Vietnam, as revealed by fieldwork in the Dak Song and Dak Mil districts. We conducted field surveys at various sites, resulting in the discovery of a rich prehistoric heritage in the region, despite challenges posed by complex natural conditions. While artifact distribution and concentration vary across sites, we identified significant concentrations in areas near lakes, rivers, and streams. We find that at locations such as Village 9A, volcanic Lake Dak Mil, and Tay Son Village, traces of concentration are faint. In contrast, at sites such as Dak Peur Border Gate and Tan Lap Village, there are traces of a dense population and long occupation by prehistoric people. The prehistoric inhabitants of Dak Mil and Dak Song districts often lived along lakes, rivers, and streams that did not dry up in the dry season; they lived in a large area and were highly mobile. Our preliminary research highlights the value of Dak Nong Province in studying the early stages of prehistory and cultural development in the Central Highlands region of Vietnam. This also underscores the importance of preserving and promoting archaeological heritage in Dak Mil and Dak Song districts