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  • Journal of Science, Hanoi National University of Education  (3)
  • 2020-2024  (3)
  • 1
    In: Journal of Science Natural Science, Journal of Science, Hanoi National University of Education, Vol. 67, No. 3 ( 2022-10), p. 124-132
    Abstract: Bat flies are highly specialized ectoparasites of the superfamily Hippoboscoidea and only associate with bats. They were rarely documented in Vietnam due to limited study in the country. Between 2017 and 2020, we conducted a series of field surveys in six localities in northern and central Vietnam with an emphasis on bat flies. Bats were captured using mist nets, harp traps, and handnets then morphologically identified following literatures relevant to the bats of each study site. Bat flies were collected using fine forceps and preserved in 70% alcohol for morphological identification. Twelve individuals of Brachytarsina cucullata and thirty-five individuals of Raymondia pseudopagodarum of the family Streblidae were collected over the surveys. Of which, B. cucullata is new to two localities in northern Vietnam (Nham Duong Mountain Area and Ha Long Bay) while R. pseudopagodarum is new to five localities in both northern and southern Vietnam (Bach Ma National Park, Cat Ba National Park, Ha Long Bay, Cu Lao Cham Island and Sop Cop Nature Reserve). Within Vietnam, B. cucullata and R. pseudopagodarum were only recorded from Cat Ba National Park and Vu Quang National Park, respectively. Notably, the previous records from Vietnam did not include either description or illustration. We here provide brief descriptions and illustrated photos of each species for morphological identification of these two bat fly species. A map showing the distributional records of each species is also included in this paper.
    Type of Medium: Online Resource
    ISSN: 2354-1059
    Language: Unknown
    Publisher: Journal of Science, Hanoi National University of Education
    Publication Date: 2022
    Location Call Number Limitation Availability
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  • 2
    Online Resource
    Online Resource
    Journal of Science, Hanoi National University of Education ; 2022
    In:  Journal of Science Natural Science Vol. 67, No. 3 ( 2022-10), p. 133-140
    In: Journal of Science Natural Science, Journal of Science, Hanoi National University of Education, Vol. 67, No. 3 ( 2022-10), p. 133-140
    Abstract: Myotis alticraniatus is a small mammal species with widespread distribution in Vietnam and other Asian countries. However, prior to the present study, its echolocation calls were poorly documented. Between 2018 and 2020, we conducted bat surveys in Cat Ba National Park and other areas of Vietnam. Echolocation calls of the species were obtained in different recording situations: handheld, flying inside a fight tent and foraging in natural habitats. The average initial frequency (iFM) and terminal frequency (tFM) of this species’ echolocation calls are in ranges of 113.2-140 kHz and 57.8-68.6 kHz, respectively. Its call duration is in a range of 1.6-3.9 ms. When detecting an object or prey in natural habitats, the species emitted echolocation calls in groups of up to 10 signals with the iFM and tFM values in ranges of 60.6-64.3 kHz and 28.2-31.0 kHz, respectively. Results from the present study exhibited a wide variation in frequencies and signal shapes of the species echolocation calls.
    Type of Medium: Online Resource
    ISSN: 2354-1059
    Language: Unknown
    Publisher: Journal of Science, Hanoi National University of Education
    Publication Date: 2022
    Location Call Number Limitation Availability
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  • 3
    Online Resource
    Online Resource
    Journal of Science, Hanoi National University of Education ; 2022
    In:  Journal of Science Educational Science Vol. 67, No. 4 ( 2022-9), p. 115-125
    In: Journal of Science Educational Science, Journal of Science, Hanoi National University of Education, Vol. 67, No. 4 ( 2022-9), p. 115-125
    Abstract: Due to the increasing competition of educational sector, universities are striving for their brand positioning. As an intangible service sector, universities can get the sustainable competitive advantage in the market by providing the excellent service quality. The study aims to evaluate students' satisfaction with the quality of Business English (BE) programs at economics universities in Hanoi, Vietnam. The model and hypotheses are developed based on quantitative research. Data was collected through self-administered close-ended questionnaire from a sample of 360 students. For analysis purpose, SPSS 22 were used to confirm the validity concerns and determine the proposed relationship among selected variables. The output reveals that lecturers are the strongest influencers of students’ satisfaction, followed by reputation, facilities and curriculum while administrative support is found to have no impact on students’ satisfaction. This study provides a ‘snapshot’ to the university management about the provision of current service quality and proposes suggestions to improve the service quality within minimum resources to get the sustainable competitive advantage in the market.
    Type of Medium: Online Resource
    ISSN: 2354-1075
    Language: Unknown
    Publisher: Journal of Science, Hanoi National University of Education
    Publication Date: 2022
    Location Call Number Limitation Availability
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