12,283 research outputs found
Oral History of Dang Nguyen
No full textThis is an oral history of Mr. Dang Nguyen. He was born in Da Nang, Vietnam in 1964. After the Fall of Saigon and the communist takeover in 1975, his father was imprisoned in a reeducation camp. In 1981, when he had just finished high school in Vietnam, he and his younger sister made their escape by boat. After three days at sea, he was processed at the Pulau Bidong refugee camp in Malaysia, where they stayed for seven months. His aunt and uncle in Akron, Ohio were able to sponsor him. After a year living in Ohio, he moved to Santa Ana, California where he pursued an Electronic Technician certificate at Santa Ana College. Through his work in an assembly line at a factory, he was able to sponsor his father and brother to California. His mother arrived via the Orderly Departure Program. He later moved on to the California State University of Long Beach to receive a Bachelors of Science in Engineering. Since then, he has worked in the computer-engineering field and is now a manager. He got married in 1993 and has three children. As of this interview, Mr. Dang Nguyen and his family live in Tustin, California.Recorded digitall
Metaphire peguana subsp. laisonensis Nguyen & Nguyen 2017
No full textMetaphire peguana laisonensis Nguyen & Nguyen, 2017 (Figures 5–6, Table 3) Metaphire peguana laisonensis Nguyen et al. 2017b: 900, fig. 12; Nguyen et al. 2021c: 105. Pheretima sp. 11 – Nguyen 2013: 78, 2014: 111. Type locality. Viet Nam (Kien Giang: Lai Son island) (Nguyen et al. 2017b) Type material. Laboratory of Zoology, Department of Biology, Can Tho University (EW.087.01), Vietnam. Diagnosis. Body cylindrical, length 62–114 mm, diameter 2.7–4.4 mm, segments 62–111. Prostomium epilobous. First dorsal pore at 12/13. Three pairs of spermathecal pores in lateral intersegments 6/7/8/9, bithecate. Two pairs of ellipsoid genital markings in xvii and xix, each genital marking with a small opening at the center. Male pores located inside copulatory pouches in xviii. Septum 10/11 only present ventrally. Intestinal caeca simple. Holandric, testis sacs separated. Accessory glands coelomic, strongly covered by muscular-walled bursae in 17/18 and 18/19. Habitat. The subspecies were found numerously in leaf litters in natural forest (Nguyen 2014; Nguyen et al. 2017b). Distribution. Only known in Vietnam (Kien Giang: Lai Son island; An Giang: Cam mountain) (Nguyen 2014; Nguyen et al. 2017b) (Fig. 3). Remarks. Nguyen et al. (2017b) described a new subspecies, M. peguana laisonensis found in Lai Son Island (Kien Giang Province, Vietnam) based on the location of genital markings, spermathecal pores, and the attachment of the spermathecal diverticulum (Fig. 5) (Nguyen et al. 2017b). Previously, Nguyen (2013) identified samples collected from the Cam Mountain (An Giang Province) as M. bahli (Fig. 6), and observed that these samples have intermediate characters between M. bahli and M. peguana, for example, slit-shaped genital markings in xvii and xix, and the much laterally wider spermathecal pores (Nguyen 2013). The re-examination confirmed that specimens were definitely M. peguana laisonensis. There was a minor difference in the ending of the spermathecal diverticulum between the type specimens from Lai Son Island and samples collected from the Cam Mountain (An Giang Province) (attached directly to the base of the ampulla duct vs. attached to the middle of the ampulla duct). Genetic distance of M. peguana laisonensis in Cam Mountain and M. peguana peguana was 12.2%±1.4%, and that distance with other Metaphire species was 12.9%±1.5% (with M. bahli (type I)) to 22.3%±2.1% (with M. grandiverticulata) (Table 4). Notes: Intraspecific distances are in bold; na = no dataPublished as part of Nguyen, Tung T., Lam, Dang H. & Nguyen, Anh D., 2023, A revision of the Metaphire peguana species-group (Oligochaeta: Megascolecidae) from Vietnam, pp. 113-135 in Zootaxa 5255 (1) on pages 123-125, DOI: 10.11646/zootaxa.5255.1.15, http://zenodo.org/record/774455
Replication Data for: Inequality and Support for Government Responses to COVID-19
No full textThese files replicate the results in "Dang, Hai-Anh, Edmund Malesky, and Cuong Viet Nguyen. (2022). "Inequality and Support for Government Responses to COVID-19". PLoS ONE.
Metaphire dorsomultitheca Nguyen & Nguyen 2015
No full text<i>Metaphire dorsomultitheca</i> Nguyen & Nguyen, 2015 <p>(Figure 11, Table 3)</p> <p> <i>Metaphire dorsomultitheca</i> Nguyen <i>et al.</i> 2015: 465, fig. 2; Nguyen <i>et al.</i> 2016: 56, 2021c: 105.</p> <p> <i>Pheretima</i> sp. 15 <i>–</i> Nguyen 2013: 87, 2014: 112.</p> <p> <b>Type locality.</b> Vietnam (An Giang: Sam mountain) (Nguyen <i>et al.</i> 2015)</p> <p> <b>Type material.</b> Laboratory of Zoology, Department of Biology, Can Tho University (EW.025.h01, EW.025. p02), Vietnam.</p> <p> <b>Diagnosis.</b> Body cylindrical, small-medium size, length 76–111 mm, diameter 2.9–3.6 mm, segments 88–120. Prostomium epilobous. First dorsal pore at 12/13. Spermathecal pores numerous in dorsal intersegments 7/8/9, polythecate. Male pores located inside copulatory pouches in xviii. Genital markings invisible outside, but two pairs opened on the front and back walls of the copulatory pouches, respectively. Septum 10/11 present only ventrally. Intestinal caeca simple. Holandric, testis sacs separated. Accessory glands coelomic, strongly covered by muscularwalled bursae in 17/18 and 18/19.</p> <p> <b>Habitat.</b> The species was usually found in the depth of 0–5 cm in the soils under small trees and shrubs on mountain peaks (Nguyen <i>et al.</i> 2015).</p> <p> <b>Distribution.</b> Known only in Vietnam (An Giang: Sam, Cam, and Co To mountains) (Nguyen <i>et al.</i> 2015) (Fig. 3).</p> <p> <b>Remarks.</b> There are no significant differences between individuals except the number of spermathecae. The K2P intraspecific genetic distance was 0.7%±0.3%. The genetic distance between <i>M. dorsomultitheca</i> and other <i>Metaphire</i> species was from 14.9%±1.6% (with <i>M. bahli</i> (I)) to 21.8%±2.0 (with <i>M. grandiverticulata</i>) (Table 4).</p>Published as part of <i>Nguyen, Tung T., Lam, Dang H. & Nguyen, Anh D., 2023, A revision of the Metaphire peguana species-group (Oligochaeta: Megascolecidae) from Vietnam, pp. 113-135 in Zootaxa 5255 (1)</i> on pages 129-130, DOI: 10.11646/zootaxa.5255.1.15, <a href="http://zenodo.org/record/7744555">http://zenodo.org/record/7744555</a>
Lasianthus kbangensis V. S. Dang, Vuong & Naiki 2022
No full text35. Lasianthus kbangensis V.S.Dang, Vuong & Naiki (2022: 292) — Fig. 59 (plate), Fig. 57 (map) Type: — VIETNAM. Gia Lai province, K’Bang district, Kon Chu Rang Nature Reserve, 1015 m elev., 20 April 2021, Van-Son Dang, Ba Vuong Truong, Ngoc Minh Tam Thao Duong, Ngan Thi Kim Le & Dinh Hiep Nguyen, Dang 463 (holotype VNM! [VNM00045839]; isotypes HN! VNM! [VNM00045840]). Specimens examined: — VIETNAM. Central: Gia Lai Province, K’Bang District, Kon Chu Rang Nature Reserve, 1010 m elev., 24 April 2021, Van-Son Dang, Ba Vuong Truong, Ngoc Minh Tam Thao Duong, Ngan Thi Kim Le & Dinh Hiep Nguyen, Dang 463a (VNM). Distribution: —Endemic to Vietnam (currently known only from Kon Chu Rang Nature Reserve of Gia Lai Province). Habitat & Ecology: — Lasianthus kbangensis is easily found under the shade of the primary evergreen forest at an elevation of 1000–1100 m. Phenology: —Flowering and fruiting from March to September. Vernacular name: —Xú hưƠng kbang. Notes: — Lasianthus kbangensis was described from a Vietnamese specimen (Dang 463) by Nguyen et al. (2022). It is similar to L. oblongilobus H.Zhu (2002: 400) in its shrub habit, smooth on branches and branchlets, and glabrous leaves, but differs in having larger leaf blades, longer petioles, calyx lobes 4 (vs. 5), smaller corolla. Fruit color is also different when ripe.Published as part of Dang, Van-Son & Naiki, Akiyo, 2023, A revision of the genus Lasianthus Jack (Rubiaceae) from Vietnam, pp. 1921-1935 in Phytotaxa 581 (1) on pages 1921-1935, DOI: 10.11646/phytotaxa.581.1.1, http://zenodo.org/record/757155
Book Review: Nguyen, V. T. (2016). The Sympathizer: A Novel. New York, NY: Grove Atlantic. 384 pp. ISBN: 978-1543618020
No full textBook Review by Linh Dang: Nguyen, V. T. (2016). The Sympathizer: A Novel. New York, NY: Grove Atlantic
Hypoponera mesoponeroides Dang & Yamane & Nguyen & Eguchi 2018, comb. nov.
No full textHypoponera mesoponeroides (Radchenko, 1993) comb. nov. Figs 2-5 Brachyponera mesoponeroides Radchenko, 1993: 81. ‒ Schmidt & Shattuck, 2014: 80. Pachycondyla mesoponeroides. ‒ Bolton, 1995: 307. Type materials examined: Brachyponera mesoponeroides; MIZ; 2 paratype workers; Vietnam, Ninh Binh, Cuc Phuong; 05.06.1966; R. Bielawski & B. Pisarski leg. Nontype materials examined: IEBR; Vietnam, Ninh Binh, Cuc Phuong, 20.29472°N 105.64500°E - 20.30250°N 105.65611°E, ca. 231 m alt.; 1 worker (colony AD17CP16), 1 worker (AD17CP30), 1 worker, 1 dealate queen (AD17CP31), 1 worker (AD17CP34), 1 worker (AD17CP37), 1 worker (AD17CP38), 1 worker (AD17CP41), 1 worker (AD17CP43); 22.03.2017; Dang V.A. leg. – MHNG; Vietnam, Ninh Binh, Cuc Phuong, 20.29472°N 105.64500°E - 20.30250°N 105.65611°E, ca. 231 m alt.; 1 worker (colony AD17CP16); 22.03.2017; Dang V.A. leg. – IEBR; Vietnam, Ninh Binh: Cuc Phuong, 20.35000°N 105.57805°E - 2 0.35861°N 105.59333°E, ca. 366 m alt.; 1 worker, 1 dealate queen (AD17CP57), 1 worker (AD17CP58), 1 worker (AD17CP60), 1 worker (AD17CP74); 23.03.2017; Dang V.A. leg. – MHNG; Vietnam, Ninh Binh: Cuc Phuong, 20.35000°N 105.57805°E - 20.35861°N 105.59333°E, ca. 366 m alt.; 1 worker (AD17CP74); 23.03.2017; Dang V.A. leg. – IEBR; Vietnam, Ninh Binh, Cuc Phuong, 20.35861°N 105.59333°E, 212 m alt.; 1 worker (AD17CP87); 24.03.2017; Dang V.A. leg. – MHNG; Vietnam, Ninh Binh, Cuc Phuong, 20.35861°N 105.59333°E, 212 m alt.; 1 worker (AD17CP87); 24.03.2017; Dang V.A. leg. – IEBR; Vietnam, Tuyen Quang, Na Hang Nature Reserve, Ban Chu; limestone forest; 22.49389°N 105.42111°E, 90-185 m alt.; 1 worker (Eg 13iii15-16), 1 worker (Eg 13iii15-25); 13.03.2015; Eguchi K. leg. – IEBR; Vietnam, Lang Son, Van Lang, 20.39055°N 105.86889°E, 967 m alt.; 1 worker (ADLS0027); 21.04.2016; Dang V.A. leg. – MHNG; Vietnam, Lang Son, Van Lang, 20.39055°N 105.86889°E, 967 m alt.; 1 worker (ADLS0027); 21.04.2016; Dang V.A. leg. Worker measurements and indices (nontypes, n=10): HL 0.85-0.93 mm; HW 0.77-0.85 mm; HS 0.81- 0.89 mm; SL 0.71-0.79 mm; ML 0.31-0.34 mm; EL 0.07-0.10 mm; PrW 0.56-0.62 mm; WL 1.18-1.36 mm; PeH 0.58-0.69 mm; PeNL 0.26-0.28 mm; PeNW 0.38- 0.41 mm; PeS 0.41-0.46 mm; ML 0.37-0.43 mm; CI 89-91; MI 33-38; SI 91-98; PeNI 64-69; LpeI 41-47; DPeI 136-154. Worker description (Figs 2-4): Head in full-face view subrectangular, distinctly longer than wide, with posterior margin very weakly concave or almost straight, with lateral margin weakly convex, in lateral view with dorsal margin straight and ventral margin slightly convex; mandible triangular; masticatory margin of mandible with large apical and two distinct preapical teeth followed by a series of smaller teeth; outer basal portion of mandible without a pit or groove; median portion of clypeus produced anteriad, with anteromedian margin weakly concave; compound eye located on the side of head close to the mandibular insertion, small (EL 0.07-0.10 mm), consisting of 12-16 ommatidia in total; antenna 12-merous; antennal scape when laid backward extending beyond posterolateral corner of head by length of antennal segment II; II almost as long as total length of III and IV; III-V almost identical in length; VI-XII gradually increasing in length towards apex, not forming a distinct club. Pronotum in lateral view with steep anterodorsal outline; mesonotum in lateral view slightly convex; promesonotal suture and mesonotal-mesopleural suture distinct; metanotal groove conspicuous across mesosomal dorsum, deeply incised; mesopleuron not divided by distinct transverse sulcus; meso-metapleural suture distinct; propodeum in lateral view with dorsum short and faintly convex or almost straight, and posterior declivity almost straight; propodeal spiracle elliptical; propodeal lobe absent; apicoventral part of meso- and metatibia with a single pectinate spur. Petiolar node in lateral view squamiform and thin; subpetiolar process developed well as a lobe, without an anterior fenestra, in lateral view with a weak concavity on the ventral margin, without a posterior shelf-like process. Abdominal tergite III as long as or slightly longer than IV. Prora present as a distinct U-shaped ridge below helcium. Head, pronotum, mesonotum and dorsum of propodeum and petiole entirely covered with fine, hair-bearing punctures; mandible smooth; mesopleuron largely smooth and shiny; metapleuron largely smooth and shiny, with posteriormost part finely striate; pretergite IV almost smooth and shiny, with fuzzy transverse striations. Body covered with appressed to subdecumbent background pubescence which is sparser in mesopleuron and metapleuron than in the remainder of body; clypeus with several erect setae; compound eye with short hairs between ommatidia; antenna covered relatively desenly with very short, appressed to suberect pubescence; abdominal segments III-VII with many erect to suberect setae among background pubescence. Body dark-brown to reddish brown; mandibles, antenna and legs paler. Queen measurements and indices (n=2): HL 0.98- 0.99 mm; HW 0.88 mm; HS 0.93-0.94 mm; SL 0.84- 0.87 mm; ML 0.38-0.4 mm; EL 0.20-0.22 mm; PrW 0.77-0.78 mm; WL 1.65-1.67 mm; PeH 0.79-0.80 mm; PeNL 0.36-0.37 mm; PeNW 0.46-0.48 mm; PeS 0.54- 0.55 mm; ML 0.47-0.48 mm; CI 95; MI 48; SI 90-93; PeNI 60-62; LpeI 46; DPeI 128-130. Queen description (Fig. 5): In general appearance queen similar to worker. Body larger than in the worker; gaster sometimes distinctly larger than in the worker. Compound eye large (EL 0.20-0.22 mm), with short hairs between ommatidia (Fig. 5C); ocelli present; distance between median and lateral ocelli as long as distance between lateral ocelli. Mesosoma with main sclerites associated with wing function (Fig. 5B); mesoscutum with conspicuous parapsidal lines, without notauli, in lateral view with slightly convex anterodorsal outline; dorsal outline of mesonotum in lateral view weakly depressed between mesoscutum and mesoscutellum; mesopleuron with a well-developed transverse sulcus that divides it into upper and lower portions; propodeum in lateral view with dorsum short and gradually sloping posteriad, and posterior declivity almost straight. Apical part of petiolar node in lateral view tapering sharply more than in the worker. Bionomics: This species inhabits in secondary and primary forests from the lowland to the highland (up to an approximately 1,000 m alt.), and nests in the leaf litters, soil, rotting logs and rotting wood fragments, and under rocks. Distribution: Known from northern Vietnam.Published as part of Dang, An Van, Yamane, Seiki,, Nguyen, Anh D., & Eguchi, Katsuyuki, 2018, New combination and redescription of Brachyponera mesoponeroides Radchenko, 1993 (Hymenoptera: Formicidae: Ponerinae), pp. 221-229 in Revue suisse de Zoologie 125 (2) on pages 224-227, DOI: 10.5281/zenodo.141420
Replication Data for: Inequality and Support for Government Responses to COVID-19
No full textThese do files and data help replicate the results in the paper "Inequality and Support for Government Responses to COVID-19" by Hai-Anh H. Dang, Edmund Malesky and Cuong Viet Nguyen (earlier version IZA Discussion paper No. 13816). The World file "Note on data and codes" describes these files in more detail
Replication data for "The Long-Run and Gender-Equalizing Impacts of School Access: Evidence from the First Indochina War"
No full textThese data and do files replicate the results in the paper "The Long-run and Gender-equalizing Impacts of School Access: Evidence from the First Indochina War", by Dang, Hai-Anh, Trung Hoang, and Ha Nguyen. (forthcoming) Economic Development and Cultural Change
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