347 research outputs found
FIGURES 20–25 in Description of Chlorogomphus danhkyi sp. nov. from Vu Quang National Park, central Vietnam with notes on other congeners from the Park (Odonata Chlorogomphidae)
No full textFIGURES 20–25. Appendages of Chlorogomphus spp., ♂. (20, 21), C. nasutus; (22, 23), C. sachiyoae; (24, 25), C. tunti.Published as part of Phan, Quoc Toan, Karube, Haruki, Hung, Nguyen Viet & Anh, Tran Dinh, 2021, Description of Chlorogomphus danhkyi sp. nov. from Vu Quang National Park, central Vietnam with notes on other congeners from the Park (Odonata Chlorogomphidae), pp. 102-110 in Zootaxa 4985 (1) on page 108, DOI: 10.11646/zootaxa.4985.1.6, http://zenodo.org/record/493036
Land-tenure policy reforms: Decollectivization and the Doi Moi system in Vietnam
No full textmillions fed, food security, rice, Land tenure, Land reform, Doi Moi, Decollectivization,
Supplementary material - Supplemental material for New Constituents From the Roots and Stems of <i>Paramignya trimera</i>
No full textSupplemental material, Supplementary material, for New Constituents From the Roots and Stems of Paramignya trimera by Tran Thu Huong, Vu Thi Ha, To Dao Cuong, Ninh The Son, Tran Quoc Toan, Hoang Thi Ngoc Anh, Nguyen Thi Thu Tram, Sun Hee Woo, Young Ho Kim, and Nguyen Manh Cuong in Natural Product Communications</p
Chlorogomphus (Sinorogomphus) nasutus subsp. nasutus Needham 1930
No full textChlorogomphus (Sinorogomphus) nasutus nasutus Needham, 1930 (Figures 20, 21) Examined specimens. 4 ♂♂, 1 ♀, Khe Ro (15.0444 N, 107.9270 E, altitude 1480 m), Vu Quang National Park, Kim Quang Commune, Vu Quang District, Ha Tinh Province, 2.vi.2020, Q. T. Phan & Q.P. Ngo leg. Notes. Body coloration of both sexes and male appendage morphology from Vu Quang National Park (Figs 20, 21) match those in Karube (2013: Fig. 11). The nominotypic subspecies was formally known only from Pia Oac National Park, Cao Bang Province of northern Vietnam (Karube 2013). This record extends its geographic distribution further into central Vietnam.Published as part of Phan, Quoc Toan, Karube, Haruki, Hung, Nguyen Viet & Anh, Tran Dinh, 2021, Description of Chlorogomphus danhkyi sp. nov. from Vu Quang National Park, central Vietnam with notes on other congeners from the Park (Odonata Chlorogomphidae), pp. 102-110 in Zootaxa 4985 (1) on page 107, DOI: 10.11646/zootaxa.4985.1.6, http://zenodo.org/record/493036
Eye Lesions in Patients After One Year of Kidney Transplantation
No full textNguyen Le Trung,1,2 Pham Quoc Toan,3 Nguyen Kien Trung,4 Vu Anh Tuan,1 Nguyen Thu Huyen5 1Vietnam Department of Ophthalmology, Hanoi Medical University, Hanoi, Vietnam; 2Vietnam Department of Ophthalmology, Military Hospital 103, Hanoi, Vietnam; 3Vietnam Department of Nephrology, Military Hospital 103, Hanoi, Vietnam; 4Vietnam Department of Trauma, National Eye Hospital, Hanoi, Vietnam; 5Vietnam Department of Ophthalmology, National Military Hospital 108, Hanoi, VietnamCorrespondence: Pham Quoc Toan, Email [email protected]: Determine the incidence of some eye lesions in kidney transplant patients after one year at Military Hospital 103 and comment on related factors.Patients and Methods: A cross-sectional study description of 111 kidney transplant patients (222 eyes) at Military Hospital 103. We assessed several eye lesions, including dry eyes, corneal conjunctival calcification, cataracts, and retinopathy.Results: The rate of retinopathy was 84.7%, dry eye was 59.5%, cataract was 29.7%, and corneal conjunctival calcification was 24.8%, atrophy optic nerve was 9.9%, epiretinal membrane was 1.8%. Post-transplant influence factors associated with cataracts include the dose of prednisolone (OR= 1.6, p < 0.05) and post-transplant diabetes (OR=1.4, p < 0.05). The influence factor related to the atrophy of the optic nerve is systemic infection after transplantation (OR=2.4, p < 0.05).Conclusion: Retinopathy accounted for the highest rate, followed by dry eye disease; cataracts ranked third; and finally, calcified corneal conjunctiva. Factors that affect cataracts are diabetes mellitus and prednisolone dose. Factors affecting optic nerve atrophy are infections after kidney transplantation.Keywords: kidney transplant, corneal conjunctival calcification, dry eyes, hypertensive retinopath
Matrona taoi Phan & Hamalainen, spec. nov.
No full textMatrona taoi Phan & Hämäläinen, spec. nov. (Figs. 1–7) Material. Holotype 3: Vietnam, Phu Tho province, Tan Son district, Xuan Son National Park, Xom Coi, (21 °06'56.6''N, 104 ° 57 '27.4''E), elevation 442 m, 15 xi 2010, Phan Quoc Toan leg. Holotype to be deposited in Vietnam National Museum of Nature (VNMN), Hanoi. Paratypes: 1 3, 3 Ƥ, same locality as for holotype, 07 xii 2009, Phan Quoc Toan leg.; 2 3, 4 Ƥ, same locality as for holotype, 15 xi 2010, Phan Quoc Toan and Do Manh Cuong leg.). Paratypes are deposited in the authors’ collections; 2 3, 2 Ƥ in coll. Hämäläinen, the rest in coll. Phan. Etymology. The species is named after Mr Nguyen Thien Tao (Biology Department, Vietnam National Museum of Nature) as a token of gratitude for his friendly support of the first author’s field work and research activity. Diagnosis. A Matrona species with reddish-brown wings, lacking any milky coloured reticulation at the wing bases of the male; apical 1 / 3 rd of male fore wing subhyaline. Posclypeus metallic green. Ventral side of the apical segments of abdomen a conspicuous pale olive yellow. Description of male (Figs 1, 3). Head: Labium olive yellow, the lateral lobes black at tips. Labrum black with an olive yellow median band, narrowed in the middle; in older specimens the yellow colour reduced to two separate spots. Base of mandibles largely yellow. Anteclypeus black with an obscure yellow spot in the middle. Postclypeus shining metallic green. Frons and upper surface of head black with obscure metallic green sheen. Genae black. Antennae dark, with a yellowish stripe on pedicel. Prothorax dark metallic green. Synthorax dark metallic green. Pale yellow portions are restricted to the level anterior to stigma and around metepimeron (Fig. 3). Underside of synthorax largely pale yellow. Legs: Coxae pale yellow with black markings on pro- and mesothoracic legs. Femora black with flexor surface partly pale in younger specimens, more markedly so in meso- and metathoracic legs. Tibiae black; meso- and metathoracic tibiae moderately curved (Fig. 3). Wings (Fig. 5) largely brownish, the apical 1 / 3 rd of fore wing subhyaline; in hind wing the apical part slightly more hyaline than base; this difference less marked than in fore wing. In hind wing lower half darker in middle section of wing. Venation dark violet red. Reticulation sparse for genus, best seen in number of intercalary veins and density of crossveins in the area defined by CuP and wing border (Fig. 7) and in wing tip. Only 1–3, partly reticulated, crossveins in median space. Cubital space with 17–20 crossveins in fore wing, 17–20 in hind wing (in holotype 20 crossveins in all wings). Quadrangle with 13–18 crossveins in fore wing, 14–20 in hind wing (in holotype 15 – 13 and 18 – 18, respectively). Antenodals (in first row) number 41–53 in fore wing and 36–48 in hind wing (in holotype 41 – 41 and 38 – 36, respectively). Arculus (Arc) situated at the level of the fifth antenodal. Pterostigma absent in both wings. Abdomen metallic bluish-green dorsally and laterally; the lower half of side of S 10 yellow (Fig. 3). Ventral side of S 1 -S 5 blackish brown, S 6-7 obscurely pale yellow and S 8 -S 10 conspicuous pale olive yellow (Figs 1, 3). Anal appendages of the typical shape for the genus: cercus wholly black, bearing a row of small spines laterally; paraproct more than half of the length of cercus, black at tip, yellow laterally and ventrally. Measurements (mm): Hind wing 38–42 (in holotype 38); abdomen (incl. appendages) 54–61 (in holotype 54). Description of female (Figs 2, 4): Head and thorax coloured as in male. Wings (Fig. 6) reddish-brown throughout, an obscure darker band in the apical third of hind wing, the darker colour extending basad along wing border. Venation reddish brown to pale brown. Reticulation as sparse as in male. Median space of fore wing with 1–3 crossveins; 2–4 crossveins in hind wing. Cubital space with 18–23 crossveins in fore wing, 18–23 in hind wing. Quadrangle with 12–20 crossveins in fore wing, 15–19 in hind wing. Antenodals (in the first row) number 45–54 in fore wing and 41–48 in hind wing. Pseudopterostigma yellowish cream, short, covering 6–9 underlying cells. Abdomen dark reddish brown, the apical segments obscurely pale laterally. Measurements (mm): Hind wing 44–46; abdomen (incl. appendages) 53–57 mm. Biology. The species was found on three streams located about 4–5 km from the Centre of Xuan Son Community. Two of the streams were open in places, 3–5 m and 5–10 m wide, respectively. Matrona taoi were collected along sections of these streams where riffles and quieter waters alternate and where the banks are densely vegetated. The third stream, a 1–7 m wide shaded branch of the narrower stream above, is in primary forest. Other calopterygids occurring on these streams were Matrona basilaris Selys, Neurobasis chinensis (Linnaeus), Ve s t al is gracilis (Rambur), Vestalaria miao (Wilson and Reels) and Noguchiphaea yoshikoae Asahina. For more details and photographs of these streams, and of their calopterygid, chlorocyphid and euphaeid fauna, see Phan & al. (2011). Females were observed from 0800 h to 1700 h, but males were seen only around noon. The damselflies perched on tree branches and bushes at the water’s edge, 50 cm to 2–3 m above the surface. No territorial behaviour was documented. In sunshine the wings display a distinct reddish violet sparkle.Published as part of Phan, Quoc Toan & Hämäläinen, Matti, 2011, Matrona taoi spec. nov., a new damselfly species from northern Vietnam (Odonata: Calopterygidae), pp. 63-68 in Zootaxa 2927 on pages 63-68, DOI: 10.5281/zenodo.20345
Chlorogomphus (Sinorogomphus) tunti Needham 1930
No full textChlorogomphus (Sinorogomphus) tunti Needham, 1930 (Figures 24, 25) Examined specimens. 1 ♂, Khe Ro (15.0444 N, 107.9270 E, altitude 1480 m), Vu Quang National Park, Kim Quang Commune, Vu Quang District, Ha Tinh Province, 2.vi.2020, Q. T. Phan leg. Notes. Appendages of the male from Vu Quang National Park (Figs 24, 25) resemble those from Bach Ma National Park (Karube 2013: Fig. 14g, h). Chlorogomphus tunti was recorded from Pia Oac National Park (Cao Bang Province) of the North and from Sao La Nature Reserve (Thua Thien Hue Province) and Tay Giang District (Quang Nam Province) of Central Vietnam (Karube et al. 2020; Kompier 2014). We do not follow Zhang (2019) in considering C. tunti a junior subjective synonym of the older name Chlorogomphus suzukii (Oguma, 1926); this issue will be discuss in the future study.Published as part of Phan, Quoc Toan, Karube, Haruki, Hung, Nguyen Viet & Anh, Tran Dinh, 2021, Description of Chlorogomphus danhkyi sp. nov. from Vu Quang National Park, central Vietnam with notes on other congeners from the Park (Odonata Chlorogomphidae), pp. 102-110 in Zootaxa 4985 (1) on page 107, DOI: 10.11646/zootaxa.4985.1.6, http://zenodo.org/record/493036
Chlorogomphus (Sinorogomphus) sachiyoae Karube 1995
No full textChlorogomphus (Sinorogomphus) sachiyoae Karube, 1995 (Figures 22, 23) Examined specimens. 3 ♂♂, Khe Da Lai (18.1762 N, 105.5371 E, altitude 160 m), Vu Quang National Park, Phu Gia Commune, Huong Khe District, Ha Tinh Province, 9.v.2019, Q. T. Phan & Q.P. Ngo leg.; 1 ♂, Khe Voi (18.4018 N, 105.2846 E, altitude 125 m), Vu Quang National Park, Son Kim 1 Commune, Huong Son District, Ha Tinh Province, 24.vii.2020, Q. T. Phan leg. Notes. This species was originally described from Tam Dao National Park, Vinh Phuc Province (Karube 1995) and was subsequently reported from Pia Oac National Park, Cao Bang Province, both located in northern Vietnam (Kompier 2014). Recently Karube et al. (2020) also recorded this species from Pu Mat and Vu Quang National Parks, both in central Vietnam.Published as part of Phan, Quoc Toan, Karube, Haruki, Hung, Nguyen Viet & Anh, Tran Dinh, 2021, Description of Chlorogomphus danhkyi sp. nov. from Vu Quang National Park, central Vietnam with notes on other congeners from the Park (Odonata Chlorogomphidae), pp. 102-110 in Zootaxa 4985 (1) on page 107, DOI: 10.11646/zootaxa.4985.1.6, http://zenodo.org/record/493036
Prodasineura croconota Ris 1916
No full textProdasineura croconota Ris, 1916 Figs 6 A–C, 7 A–C, 8 A–C, 13 A–B, 16 B, 18 Material examined VIETNAM – Gia Lai Province • 2 ♂♂, 2 ♀♀; K’Bang District, KaNak; 25 Apr. 2015; Q.T. Phan leg.; ZCDTU 2015042502-ODO. – Ha Tinh Province • 3 ♂♂, 2 ♀♀; Vu Quang National Park; 7 Sep. 2015; Q.T. Phan leg.; ZCDTU 2015090702-ODO. – Quang Nam Province • 1 ♂; Cu Lao Cham Island, 25 Sep. 2015; Q.T. Phan leg.; ZCDTU 2015092502-ODO • 1 ♂; Tay Giang District, Bhalee Commune; 25 Jul. 2019; Q.T. Phan leg.; ZCDTU 2019072510-ODO. – Lam Dong Province • 4 ♂♂, 1 ♀; Bao Loc District, Bao Lam; 11 Mar. 2016, Q.T. Phan leg.; ZCDTU 2016031101-ODO • 1 ♂; Bao Loc District, Dambri; 12 Jul. 2017; Nguyen Dang Van leg.; ZCDTU 2017071702-ODO. – Quang Binh Province • 4 ♂♂, 4 ♀♀; Minh Hoa District, Tan Hoa Commune; 14 Apr. 2016; Q.T. Phan leg.; ZCDTU 2016041401-ODO. – Da Nang City • 1 ♂; Hai Van, Van village; 21 Feb. 2017; Q.T. Phan leg.; ZCDTU 2017022102-ODO • 2 ♂♂; Son Tra Nature Reseve; 8 Jun. 2017; Q.T. Phan leg.; ZCDTU 2017060802- ODO. – Khanh Hoa Province • 4 ♂♂; Hon Ba Nature Reserve; 28 Mar. 2018; Q.T. Phan leg.; ZCDTU 2018032802-ODO. – Nghe An Province • 4 ♂♂, 2 ♀♀; Pu Mat National Park (Con Cuong District, Mon Son Commune); 13 May 2019; Q.T. Phan leg.; ZCDTU 2019051302-ODO. Diagnosis Male characterized by large egg-shaped orange-yellow markings on dorsum of synthorax (Fig. 6A, C); head dorsally with two small spots adjacent to ocellar tubercle (Fig. 6A); cerci varying from bluish to yellow dorsally, most of paraproct yellowish (Fig. 7 A–B). Female differing from male by having transverse yellow stripe across epicranium, whitish stripes on synthorax, thin antehumeral stripes (Fig. 6B). Structure of posterior pronotal lobe of prothorax in dorsal view similar to that of P. autumnalis with two rounded processes posteriorly, two short, robust horns distally (Figs 8 A–B, 13A–B). Distribution Vietnam (Fig. 18): Lang Son (Huu Lien Nature Reserve), Phu Tho (Xuan Son National Park), Thai Nguyen, Vinh Phuc (Me Linh), Nghe An (Pu Mat National Park), Ha Tinh (Huong Son District and Vu Quang National Park), Quang Binh (Minh Hoa District), Quang Tri, Quang Nam (Tay Giang District and Cu Lao Cham Islands), Da Nang (Son Tra Nature Reserve), Gia Lai (K’Bang District), Lam Dong (Bao Loc District) and Khanh Hoa (Hon Ba Nature Reserve) Provinces (Kompier 2019; T. Kompier pers. comm.; Phan & Dinh 2016; Phan & Ngo 2019; this study).Published as part of Phan, Quoc Toan & Ngo, Quoc Phu, 2020, A revision of the systematics and distribution of the damselfly genus Prodasineura Cowley, 1934 (Odonata: Zygoptera: Platycnemididae) in Vietnam with description of two new species, pp. 1-27 in European Journal of Taxonomy 650 on page 9, DOI: 10.5852/ejt.2020.650, http://zenodo.org/record/383979
Scalable Subgraph Mining: Methods and Applications
No full textGraphs are universal languages to model complex data. Subgraph mining, a fundamental task in graph analysis, aims to discover meaningful and interesting patterns in large-scale graph data. It has wide-ranging applications across diverse domains, including social network analysis, social science, and bioinformatics. Traditional subgraph mining methods commonly employ a two-step process involving candidate generation and pattern verification. However, the computational costs associated with these steps become prohibitive when dealing with large and complex graph datasets, resulting in computational bottlenecks and impractical runtimes.
The primary objective of this thesis is to propose scalable and effective methods for subgraph mining, with a specific focus on three widely applicable types of subgraph patterns: anomalous subgraph mining, frequent subgraph mining in multiple graphs, and frequent subgraph mining in a single graph.
To achieve this goal, we propose innovative approaches that involve transforming the original graph into a lower-dimensional representation. This new representation captures the complex higher-order relationships within the data graph. Consequently, the search space in both candidate generation and pattern verification steps is substantially reduced, as these steps are performed in the numerical space of the new representations rather than the exponentially combinatorial graph space. Given the inherent challenge of learning a universal representation for the aforementioned three types of patterns, we employ a divide-and-conquer strategy. We break down the overall objective into three smaller and attainable research goals, each targeting the development of an effective model for learning representations that facilitate the mining process of a specific type of subgraph pattern.
By conducting thorough experiments, our proposed algorithms demonstrate a substantial improvement over existing techniques, surpassing their performance and successfully scaling to handle larger patterns that previous solutions were unable to accommodate. The findings from these experiments have practical applications across diverse domains.Thesis (PhD Doctorate)Doctor of Philosophy (PhD)School of Info & Comm TechScience, Environment, Engineering and TechnologyFull Tex
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