126,566 research outputs found
On Kolmogorov entropy compactness estimates for scalar conservation laws without uniform convexity
No full textIn the case of scalar conservation laws u_t +f(u)_x = 0; t > 0; x in R, with uniformly strictly convex flux, quantitative compactness estimates-in terms of Kolmogorov entropy in L^1_{loc}- were established in [C. De Lellis and F. Golse, Comm. Pure Appl. Math., 58 (2005), pp. 989{998; F. Ancona, O. Glass, and K. T. Nguyen, Comm. Pure Appl. Math., 65 (2012), pp. 1303{1329] for sets of entropy weak solutions evaluated at a fixed time t > 0, whose initial data have a uniformly bounded support and vary in a bounded subset of L1. These estimates reflct the irreversibility features of entropy weak discontinuous solutions of these nonlinear equations. We provide here an extension of such estimates to the case of scalar conservation laws with a smooth flux function f that either is strictly (but not necessarily uniformly) convex or has a single inflection point with a polynomial degeneracy
Eumenes congnatus Nguyen, sp. nov.
No full textEumenes congnatus Nguyen, sp. nov. (Figs 7–12) Material examined. Holotype, ♀, “ VIETNAM, Tuyen Quang, Bac Vang Ranger Station, Na Hang Natural Reserve, Na Hang, 22 ° 20 ' 52.6 "N 105 ° 25 ' 49 "E, 10.VI. 2015, LTP Nguyen, DD nguyen & LX Truong [IEBR]. Paratypes: VIETNAM: Ha Giang: 1 ♂, Tung Ba, Vi Xuyen, 3.vii. 2013, TV Nguyen; Bac Kan: 1 ♀, Lang San, Na Ri, 21 0 15 ’N, 106 0 06’E, 270 m, 3-4.viii. 2012, J Kojima, H Nugroho & IED-c; Thai Nguyen: 1 ♂, Xom O, Yen Lac, Phu Luong, 2.vi. 2014, LTP Nguyen; Son La: Lang Son: 1 ♀, Cai Kinh, xi. 2015, LTP Nguyen, DD Nguyen & NT Tran; Son La: 1 ♀, Nam Pam, Muong La, 660 m, 25.vii. 2009, LTP Nguyen, PH Pham & J Kojima; Vinh Phuc: 1 ♂, Tam Dao NP, 21 0 26 ’N, 105 0 37 ’E, 400 m, 20.viii. 2005, J Kojima; Ha Noi: 1 ♂, Suoi Mo, Yen Bai, Ba Vi, 01.vi. 2001, LTP Nguyen Hai Duong: 1 ♀, Hoang Hoa Tham, Chi Linh, 19.viii. 2012, O.T. Nguyen [IEBR]; Lang Son: 3 ♂, Cai Kinh, Huu Lung, 22 ° 39 ' 42.9 "N, 106 ° 15 ' 36 "E, 28 m, 24.xi. 2015, LTP Nguyen, DD Nguyen, NT Tran; Thanh Hoa: 1 ♂, Xuan Lien NR, Hon Can, Van Xuan, Thuong Xuan, 19052 ’ 27.5 ”N, 105014 ’ 20.8 ”E, 106 m, LTP Nguyen; Nguyen; Nghe An: 1 ♀, Pu Mat NP, 26.vii. 2004, LTP Nguyen [VNMN]. Description. Female. Body length 11–12 mm (holotype 11.5 mm); fore wing length 10–11 mm (holotype 10.5 mm). Structure as in Eumenes longus sp. nov., but differs as follows. Head in frontal view slightly wider than high (Fig. 7). Distance between inner eye margins (frontal view) at vertex twice more than at clypeus. Clypeus nearly 1.8 × as highas wide (Fig. 7). Metasomal segment 1 in dorsal view gradually widened from base to apex (Fig. 9), tergum and sternum fused, suture between them distinct almost throughout basal part. T 2 in lateral view as long as wide (Fig. 8). Body with slightly less coarse punctures than in E. longus. Color. Black, with following parts yellow: narrow band along inner eye margin extending from bottom to near ocular sinus, spot between antennal sockets, short line at vertex behind eye, short line at basal margin of dorsal pronotum, apical part of parategula and apical margin of T 1. Legs black. Propodeal valvulae dark brown. Wings dark brown, strongly infuscate, veins dark brown. Male. Body length 10–11 mm; fore wing length 9–10 mm. Structure as in female and male of E. longus but clypeus proportionally longer, in frontal view 2.3 × as long as wide, with sharper teeth (Fig. 10). F 11 propotionaly shorter than in E. longus (Fig. 11). Color as in female. Distribution. Northern Vietnam: Tuyen Quang, Ha Giang, Bac Kan, Thai Nguyen, Son La, Vinh Phuc, Ha Noi, Thanh Hoa, Nghe An. Etymology. The specific name refers to the similarity with its congener E. longus. Remarks. This species is similar to E. longus, but can be easily distinguished from the latter by having T 1 gradually widened from base to apex (gradually widened basally and then parallel in E. longus), T 2 in lateral view as long as wide (1.1 × as long as wide in E. longus), and male clypeus with sharper teeth. This species can be distinguished from two Papuan species by having clypeus nearly 1.8 × as high as wide (less than 1.3 × as high as wide in two Papuan species).Published as part of Nguyen, Lien Thi Phuong, 2016, Two new species of the genus Eumenes Latreille, 1802 (Hymenoptera: Vespidae, Eumeninae) from Vietnam, pp. 583-588 in Zootaxa 4093 (4) on pages 585-587, DOI: 10.11646/zootaxa.4093.4.11, http://zenodo.org/record/27097
Figure 1 from: Dong L-N, Nguyen KS, Shui Y-M, Nguyen HQ, Xu W, Nguyen XK (2021) Begonia catbensis (sect. Coelocentrum, Begoniaceae), a new species from northern Vietnam. PhytoKeys 179: 1-12. https://doi.org/10.3897/phytokeys.179.65812
No full textFigure 1 Begonia catbensisA plants growing on rocks in the wild B habit C apical shoot bearing stipules D young leaf, abaxial view E part of adaxial leaf surface showing bullae, setae and palmate veins F dendritic hairs on petiole and abaxial veins G portion of leaf showing reddish setae on bullae and along margin. Photos and layout by K.S. Nguyen & L.N. Dong
Figure 2 from: Dong L-N, Nguyen KS, Shui Y-M, Nguyen HQ, Xu W, Nguyen XK (2021) Begonia catbensis (sect. Coelocentrum, Begoniaceae), a new species from northern Vietnam. PhytoKeys 179: 1-12. https://doi.org/10.3897/phytokeys.179.65812
No full textFigure 2 Begonia catbensisA apical part of inflorescence showing peduncle, pedicel, bracts, bracteoles, staminate and pistillate flowers B staminate and pistillate flowers C staminate flower (upper) in front view D stamens E pistillate flower-top view F pistillate flower, lateral view G dissected styles and stigmas H fruits and their cross-cut. Photos and layout by K.S. Nguyen & L.N. Dong
Gombrich (Richard F.) Precept and Practice
No full textNguyen Van Phong Joseph. Gombrich (Richard F.) Precept and Practice. In: Archives de sociologie des religions, n°32, 1971. p. 234
Fig. 5 in Gagones A-F: Six prenylated chalcones from the heartwood of Mansonia gagei
No full textFig. 5. The proposed biosynthetic pathway of 1–6.Published as part of Le, Huong Thi Thu, Nguyen, Lam H., Nguyen, Tuan H., Nguyen, Van-Kieu, Danova, Ade, Truong, Thanh N. & Chavasiri, Warinthorn, 2023, Gagones A-F: Six prenylated chalcones from the heartwood of Mansonia gagei, pp. 1-6 in Phytochemistry (113516) 206 on page 5, DOI: 10.1016/j.phytochem.2022.113516, http://zenodo.org/record/819453
Gagones A-F: Six prenylated chalcones from the heartwood of Mansonia gagei
No full textLe, Huong Thi Thu, Nguyen, Lam H., Nguyen, Tuan H., Nguyen, Van-Kieu, Danova, Ade, Truong, Thanh N., Chavasiri, Warinthorn (2023): Gagones A-F: Six prenylated chalcones from the heartwood of Mansonia gagei. Phytochemistry (113516) 206: 1-6, DOI: 10.1016/j.phytochem.2022.113516, URL: http://dx.doi.org/10.1016/j.phytochem.2022.11351
Effects of insecticidal crystal proteins (Cry proteins) produced by genetically modified maize (Bt maize) on nematode Caenorhabditis elegans
No full textHoess S, Menzel R, Gessler F, Nguyen HT, Jehle J, Traunspurger W. Effects of insecticidal crystal proteins (Cry proteins) produced by genetically modified maize (Bt maize) on nematode Caenorhabditis elegans. Environmental Pollution. 2013;178:147-151
Wright (Arthur F.) Twitchett (Denis), éd. Perspectives on T'ang
No full textNguyen Van Phong Joseph. Wright (Arthur F.) Twitchett (Denis), éd. Perspectives on T'ang. In: Archives de sciences sociales des religions, n°37, 1974. p. 269
Interview with Bill Cloonan in Japan, tape 5
No full textDuc Nguyen interviews William E. Cloonan, U.S. Navy (Retired), for the documentary Bolinao 52. Cloonan served as a Chief Petty Officer aboard the USS Dubuque when it encountered the Bolinao 52 in 1988. Cloonan had been involved with two other rescues of Vietnamese boat people before the Bolinao 52 affair. This interview took place in Japan
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