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Trung Tran,Loc Thi My Nguyen,Thanh Thi Nghiem,Hien Thi Thu Le,Cuong Huu Nguyen,Thuy Phuong La,Trung Tien Nguyen,Hang Thi-Thu Nguyen 한국과학학술지편집인협의회 2019 Science Editing Vol.6 No.2
This study aimed at elucidating the present situation of scholarly journals published in Vietnam according to the minimum criteria to be indexed in the ASEAN Citation Index (ACI) and Scopus, with the goal of suggesting development strategies for scholarly journals in Vietnam. From the 387 journals accredited by the Vietnamese State Council for Professorship, 13 education journals were arbitrarily selected, and their compliance with the five minimum criteria for the ACI (peer review, timeliness, abstracts in English, references in Roman script, and a website in English) and the six minimum criteria for Scopus (peer review, timeline, abstracts in English, references in Roman characters, Electronic International Standard Serial Number [ISSN], and publication ethics) were assessed. Two of the 13 journals were eligible to be indexed in the ACI, while none fulfilled the minimum criteria to be indexed in Scopus. An urgent task for the editors of those journals is to establish an informative journal homepage in English that provides basic information on the journal. Then, an Electronic ISSN can be obtained from the ISSN International Center. Furthermore, the following steps are suggested for journal promotion: establishment of appropriate editorial policies and publication ethics procedures, improvement of research integrity, enhancement of the journals’ reputation in the international scientific community, and improvement of the online publishing system by adopting a journal manuscript management system. To achieve those goals, financial support from the Vietnamese government will be invaluable.
Vortex shedding in free-flying beetles
Tien Van Truong,Hieu Trung Tran,Tuyen Quang Le,Hoon Cheol Park(박훈철),Doyoung Byun(변도영) 한국항공우주학회 2009 한국항공우주학회 학술발표회 논문집 Vol.2009 No.11
The detail of the field of air flow around the wings of free-flying beetle is presented by using smoke wire visualization technique. It is apparent that beetle is unusual in comparison with other insects, it has a pair of an elytron and a hind wing. Hence, vortices are generated by movement of both wings and wing-wing interaction. The images show that the vortex generated by eytron is strongly influence the vortex dynamic generated by hind wings. In forward flight, the leading edge vortex (LEV) of both wings grew in size and shed during downstroke, meanwhile the trailing edge vortex (TEV) is formed in supination. The formation of LEV on elytron highlights that total aerodynamic force of beetle can be improved by eytron.
Maneuvering flight of beetle (Allomyrina Dichotoma)
Trung-Hieu Tran,Tien Van Truong,Tuyen Quang Le,Hoon Cheol Park,Doyoung Byun 한국항공우주학회 2009 한국항공우주학회 학술발표회 논문집 Vol.2009 No.11
Maneuvering flight has been recognized as an important characteristic of insects and animals where these species frequently use. Here we investigate kinematics and role of flexibility of hind wing of Allomyrina Dichtoma in which body and wing kinematics were reconstructed into three?dimensional through DLT method. Result shows that a flexibility of hind wing can increase performance significantly in turning and stability control of beetle especially in supination and pronation phases. In the downstroke phase, hindwing has positive wing camber, inversely, it is passive deformed into negative wing camber in chordwise as well as in span wise direction at begin of upstroke. These mechanisms can create a large variant of force and moment In magnitude and direction which can change direction and altitude of beetle in maneuvering.
Three-dimensional kinematics of beetle wings in free flight
Tien Van Truong,Hieu Trung Tran,Tuyen Quang Le,Hoon Choel Park,Doyoung Byun 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
In this study, the 3D kinematics parameters of of Allomyrina dichotoma has been obtained by using 3D reconstruction from two synchronized, the high speed cameras digitalized marked points on the wings. Wing tip trajectory, attack angle and camber deformation are presented. Beetle flaps at 38Hz with flapping angle of 165 degree, the angle of attack varies significant along the spanwise direction in free flight condition. In addition, camber deformation changes greatly with time at difference section. These characteristics highlight the extraordinary flexibility of beetle’s hindwing compared with other insects: honeybee, dragonfly. Furthermore, the interaction between the elytron and the hind wing through the leading edge vortex (LEV) and trailing edge vortex (TEV) generation and development are figured out through the smoke wire visualization technique.
Effect of Flexibility performance of hindwing in maneuvering flight of beetle (Allomyrina Dichotoma)
Trung-Hieu Tran,Tien Van Truong,Tuyen Le Quang,Doyoung Byun,Hoon Cheol Park 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
High ability of maneuvering and self stability of insect flight have been interesting topic for biology researchers recently. Here we investigate kinematics and role of flexibility of hind wing of Allomyrina Dichtoma in side and back turnings. Body and wing kinematics were reconstructed into three-dimensional through DLT method. Result shows that a flexibility of hindwing can increase performance significantly in turning and stability control of beetle especially in supination and pronation phases. In the downstroke phase, hindwing has positive wing camber, inversely, it is passive deformed into negative wing camber in chordwise as well as in spanwise direction at begin of upstroke. These mechanisms can create a large variant of force and moment in magnitude and direction which can change direction and altitude of beetle in maneuvering.