64,852 research outputs found
Tran, L. T., Nguyen, L & Green, W. (2017). Enhancing the experience and outcomes of international higher degree research candidates: Reciprocal Intercultural Supervision.
No full textTran, L. T., Nguyen, L & Green, W. (2017). Enhancing the experience and outcomes of international higher degree research candidates: Reciprocal Intercultural Supervision.</p
Tran, L. T., Nguyen, L & Green, W. (2017). Enhancing the experience and outcomes of international higher degree research candidates: Reciprocal Intercultural Supervision.
No full textTran, L. T., Nguyen, L & Green, W. (2017). Enhancing the experience and outcomes of international higher degree research candidates: Reciprocal Intercultural Supervision
JODI J. L. ROWLEY, DAO T. A. TRAN, DUONG T. T. LE, VINH Q. DAU, PEDRO L. V. PELOSO, TRUONG Q. NGUYEN, HUY D. HOANG, TAO T.
No full textanonymous (2016): JODI J. L. ROWLEY, DAO T. A. TRAN, DUONG T. T. LE, VINH Q. DAU, PEDRO L. V. PELOSO, TRUONG Q. NGUYEN, HUY D. HOANG, TAO T. Zootaxa 4105 (4): 400-400, DOI: http://doi.org/10.11646/zootaxa.4105.4.
An Optimal Degree Distribution Design and a Conditional Random Integer Generator For The Systematic Luby Transform Coded Wireless Internet
No full textRecently, the authors of this paper proposed Systematic Luby Transform (SLT) codes and their soft decoding using the classic loglikelihood message passing algorithm for transmission over hostile Wireless Internet channels, where the transmitted data is affected by both packet loss events and random Gaussian noise. This scheme is further improved here with the aid of a new degree distribution and a novel random integer generator, which are termed as the truncated degree distribution and the conditional random integer generator. The SLT code using the new design is capable of achieving BER ≤ 10-5 at low Eb/N0 values. For example, the SLT(1200,3600) code attains BER ≤ 10-5 in excess of an Eb/N0 value of 1.5dB for transmission over the AWGN channel and above 3.5dB over the uncorrelated Rayleigh channel if additionally a packet erasure probability Pe of 0.1 is inflicted, an Eb/N0 value above 2dB is required for transmission over the AWGN channel and in excess of 4dB over the uncorrelated Rayleigh channel, when using a maximum of Iter = 20 iterations and Quadrature Phase-Shift Keying
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
Meristotheca lysonensis X.-V. Nguyen, X.-T. Nguyen, Kittle & McDermid 2022
No full textMeristotheca lysonensis X.-V. Nguyen, X.-T. Nguyen, Kittle & McDermid sp. nov. (Figs. 3–14) Holotype: VIETNAM. Quang Ngai: Ly Son Island; 15.3743 ° N; 109.1329 ° E, 15 February 2021, coll. X.- V. Nguyen & X.- T. Nguyen (ION - CS 210215 b, tetrasporophyte, Fig. 3). GenBank accession number for rbc L and COI-5 P: MZ 770759 and MZ 770756 Isotypes: VIETNAM. Ninh Thuan: Thai An; 11.5648 ° N; 109.1269 ° E, 20 February 2021, coll. X.- V. Nguyen & X. - T. Nguyen (ION - CS 210301 b, tetrasporophyte, Fig. 5). GenBank accession number for rbc L and COI-5 P: MZ770761 and MZ770758. VIETNAM. Quang Ngai: Ly Son Island; 15.3743 ° N; 109.1329 ° E, 02 April 2003, coll. H.- D. Nguyen & H.- T. Pham (ION -01011b, male plant, Fig. 6). GenBank accession number for rbc L and COI-5 P: MZ770760 and MZ770757 Habitat: Growing on dead corals in the mid-to lower intertidal zone where subjected to strong wave action. Etymology: The specific epithet refers to Ly Son Island, the type locality of the new species in Viet Nam. Description: Thalli prostrate or forming decumbent prostrate clumps; thallus attached to the substratum by many secondary holdfasts; thalli flattened, gelatinous in texture, deep rose-red to dark red, 10–20 cm tall with small papillae on the surface; divided into many broad segments in an irregularly dichotomous manner with rounded apices, becoming gradually narrower above and tapering below to a cuneate or sometimes cordate or heart-shaped base with a short slender stipe. Mature blades are 1–2 cm broad, margins entire at the beginning, later giving rise to irregularly branched obvious proliferations, broader or narrower intermixed; surface smooth, sometimes roughened by the presence of warty or short spinose processes (Figs 3, 4), pinkish or yellowish when dried (Figs 5, 6). Blades are 1.3–1.8 mm thick in the basal portions (Fig. 7), becoming progressively thinner upward, 320–450 µm thick below the apices (Fig. 8). Thalli are multiaxial and internally consist of a filamentous medulla. In traverse section, the outer cortex consists of 3– 4 layers of small, elongate cells, 12–20 µm in diameter, the inner cortex consists of 4–5 layers of bigger, ellipsoidal, or rounded cells, 40–140 µm in diameter. The medulla occupies about 20–30% of the blade thickness. Axial filaments run parallel to the longitudinal plane of the blade; adjacent axial filaments frequently linked by secondary pit-connections (Fig. 9). Crosswise filaments originate from inner cortical cells and traverse the blade to connect with inner cortical cells of the opposite side (Fig. 10). Tetrasporangia in scattered patches throughout the outer cortex on both dorsal and ventral sides of the entire blade except at tips and lowermost portions. Tetrasporangia are cut off from cortical cells located in the second layer of the outer cortex. In a few cases, tetrasporangial initials appear laterally, pit-connected to their parental cells (Fig. 11). Tetrasporangial initials are basally attached to their supporting parental cortical cells (Fig. 12, solid triangle), and basal pit-connections remain in mature tetrasporangia. Tetrasporangia zonately divided, 10–15 µm diameter and 40–45 µm long (Fig. 13). Spermatangia produced from the outermost cortical cells (Fig. 14). Female gametophytes were not observed. R emarks:A morphological comparison of M. lysonensis and other related species is given in Table 1. Meristotheca lysonensis sp. nov. differs from M. coacta based on M. lysonensis’ larger size and greater blade thickness, blades that do not bear proliferations along the margins, and usually smooth blade margins. M. lysonensis clade habit is compressed to flattened. Pit-connections between tetrasporangial initials and the supporting parental cells change from lateral (young tetrasporangium) to basal (divided tetrasporangium). Meristotheca lysonensis also differs from M. procumbens in terms of thallus size and thickness, and the smaller medulla thickness in cross-sections. Position of pit-connections between tetrasporangial initials and the parental cells differ: basal position in M. lysonensis sp. nov., unlike lateral position in M. procumbens. This new species also differs from M. papulosa because M. lysonensis has many secondary holdfasts compared to single or a few erect blades arising from a discoid holdfast in M. papulosa. There are no branchlets in M. lysonensis whereas M. papulosa shows branchlets.Published as part of Nguyen, Xuan-Vy, Nguyen, Xuan-Thuy & Kittle Iii, Ronald P., 2022, Meristotheca lysonensis sp. nov. (Solieriaceae, Rhodophyta), a new flattened species from Vietnamese waters, pp. 137-148 in Phytotaxa 574 (2) on pages 141-144, DOI: 10.11646/phytotaxa.574.2.2, http://zenodo.org/record/738082
Fig 1. – Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D in Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D. Vu (Poaceae), a new species from Vietnam
No full textFig 1. – Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D. Vu. A. Culm and dormant bud; B. Culm sheath (abaxial view); C. Culm sheath (adaxial view); D. Leaf; E. Leaf ligule; F. Flowering branch; G. Pseudospikelet; H. Prophyll; I. Glume; J. Lemma; K. Palea; L. Pistil; M. Anther. [A-C: V. T. Nguyen NVT224, FSIV; D-M: V. T. Nguyen NVT260, FSIV] [Drawn by V. T. Nguyen]Published as part of Nguyen, Van Tho, Le, Viet Lam, Vu, Van Dung & Xia, Nian-He, 2012, Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D. Vu (Poaceae), a new species from Vietnam, pp. 255-259 in Candollea 67 (2) on page 257, DOI: 10.15553/c2012v672a6, http://zenodo.org/record/571021
Characterization and photocatalytic activity of the biochar converted from the Acrostichum aureum Linn. biomass
No full textIn the present study, Acrostichum aureum Linn. (AAL) was proved as an accumulator of iron and a potential candidate to remove iron pollutants from groundwater. The iron-loaded biochar converted from the iron-contaminated AAL plants was determined the characterization and photocatalytic activity to demonstrate the potential for reusing the AAL biomass enriched with iron. In a 47-day hydroponic experiment, AAL plants could steadily grow in 20.0 mg L-1 Fe(NO3)(3) solutions and pH ranging from 6.0 to 7.0. The total amount of iron introduced into the phytoremediation system is 240 mg iron, of which the AAL plants accumulate about 70%. X-ray diffraction (XRD) analysis showed that the iron-enriched biochar (named Fe-Bio-C) mainly consists of alpha-Fe2O3, and the Fe content determined by EDX is around 23 wt%. BET results revealed that the iron-enriched biochar possesses a higher specific surface area, around 266.9 m(2) g(-1), compared to the original biochar, around 18.2 m(2) g(-1). The photocatalytic performance of the Fe-Bio-C was studied in the discoloration of methyl orange (MO), with a maximum MO removal capacity of 18.8 mg g(-1). These findings show the phytoaccumulation of Acrostichum aureum Linn. plants to remove iron pollutants from groundwater and the potential application of the iron-accumulated biomass.
Luby Transform Coding Aided Bit-Interleaved Coded Modulation for the Wireless Internet
No full textBit-Interleaved Coded Modulation using Iterative Decoding (BICM-ID) is amalgamated with Luby Transform (LT) coding. The resultant joint design of the physical and data link layer substantially improves the attainable Bit Error Rate (BER) performance. A Cyclic Redundancy Check (CRC) combined with a novel Log-Likelihood Ratio (LLR) based packet reliability estimation method is proposed for the sake of detecting and disposing of erroneous packets. Subsequently, bit-by-bit LT decoding is proposed, which facilitates a further BER improvement at a lower number of BICM-ID iterations. Finally, we revisit the pseudo random generator function used for designing the LT generator matrix
Leptolalax ardens Rowley & Tran & Le & Dau & Peloso & Nguyen & Hoang & Nguyen & Ziegler 2016, sp. nov.
No full textLeptolalax ardens sp. nov. Figs. 7D, 9A, 10. Holotype. VNMN 04707/AMS R 176454, adult male, calling on clay bank 1.5 m from headwaters of 1–2m wide rocky, medium gradient, high–flow stream in evergreen forest in Kon Ka Kinh National Park, Gia Lai Province, Vietnam (14.2258º N, 108.3230º E; 1162 m elevation, Fig. 1, Fig 9E). Collected at 19:30 h on 21 August 2011 Jodi J. L. Rowley, Vinh Quang Dau, Huy Duc Hoang, Luong Thi Nguyen, Tan Thanh Le, Dinh Djung, and Y H'Jun. Paratypes. AMS R 176452–176453, two adult males (both calling), and VNMN 04708/AMS R 176455– VNMN 04710/AMS R 176457, three adult males (not observed calling), collected on same date and locality as holotype. VNMN 04711 /AMS R 176458, adult female (gravid) and VNMN 04712 /AMS R 176459 adult male (calling), collected at 19:55 h on 23 August 2011 in evergreen forest in Kon Ka Kinh National Park, Gia Lai Province, Vietnam (14.2263º N, 108.3345º E; 1450 m elevation). UNS 00530/AMS R 176460–UNS 00532/ 176462, AMS R 176463, AMS R 176464, UNS 00533/176465, UNS 00534 /AMS R 176466, 176467, and NCSM 79650, 9 adult males, collected at night on 24 August 2011 in swampy area with small rocky stream in evergreen forest in Kon Ka Kinh National Park, Gia Lai Province, Vietnam (14.2197 º N, 108.3207 º E; 1041 m elevation). All specimens were collected by Jodi J. L. Rowley, Vinh Quang Dau, Huy Duc Hoang, Luong Thi Nguyen, Tan Thanh Le, Dinh Djung, and Y H'Jun. Etymology. The specific name “ ardens ”, meaning burning, fiery, shining, or brilliant, is used as an adjective in reference to the bold and conspicuous coloration of this species compared to other species in the group. Diagnosis. Assigned to the genus Leptolalax on the basis of the following characters: small size, rounded finger tips, the presence of an elevated inner palmar tubercle not continuous to the thumb, presence of macroglands on body (including supra–axillary, pectoral, femoral and ventrolateral glands), the absence of vomerine teeth, the presence of tubercles on eyelids, and anterior tip of snout with pale vertical bar (Dubois 1983; Lathrop et al. 1998; Delorme et al. 2006). Leptolalax ardens sp. nov. is distinguished from its congeners by a combination of (1) supra– axillary and ventrolateral glands present; (2) dark brownish red ventral surface with white speckling; (3) small SVL for the genus (21.6.1– 24.7 mm in 15 adult males, 24.5 mm in one female); (4) toes lacking webbing and lateral fringes; (5) tibia length 44–49% of SVL in males; (6) pectoral gland 3.5–5.6% of SVL in males, (7) mostly smooth dorsum, (8) iris dark coppery brown, (9) distinct black supratympanic line present, (10) an advertisement call with 3–10 notes with the first, introductory note encompassing one–third of each call. Description of holotype. Head width equal to head length; snout slightly truncate in dorsal view and rounded in profile, projecting slightly beyond margin of the lower jaw; nostril closer to snout than to eye; canthus rostralis indistinct, gently rounded; lores sloping; pupil vertical; eye diameter smaller than snout length; tympanum distinct, round, diameter smaller than that of the eye; tympanic rim elevated relative to skin of temporal region; vomerine teeth absent; pineal ocellus absent; vocal sac openings slit–like, located posteriolaterally on floor of mouth; tongue wide with broad, shallow notch at posterior tip; supratympanic ridge distinct, running from eye to axillary gland. Tips of fingers rounded, very slightly swollen; relative finger lengths I 4.5% divergence at the 16S gene fragment examined. Interspecific variation in three L. ardens sp. nov. collected from ~ 2 km apart was 0%. 1 Leptolalax applebyi : ;: (;: 3;). ( +. 3 (/)* 3)/ 3* ;: * K.).;:)K.));: *(K ;:)K 3/;:*..K /;:(/K/ 3;:3K3)/;:.K +; ; * + *3 3 (+ (* 3 (. / * :*3)K).;: (*K (;: *.K. /;:*.)K *.;: K. *;:* 3K; * / *. ! Leptolalax 0 2 !> 1 2!:; 9 5 C H 2 K botsfordi & 0 0 0 2 eos > 0 0 0 " 2 0 firthi > 0 (.K 3 2 " B fuliginosis K)) B & " " 0 0 :; melanoleucus 0 " " 0 0 0 minimus H + (K *. B = 2 nahangensis H 0 0 .) B 6 C + * B P 7 0 pluvialis 0 0 0 2 solus H 0 0 / (B " H sungi H " . K+ / tuberosus H 0 0 zhangyangpingi H 0 0 .+ K+ + " " 0 0 0:; applebyi & 0 0 0 *3 (K:) ; B 2 bidoupensis & 0 0 0 * +K +.: (; B & " 2 0 melicus & 0 0 0 *3 +K /:) /; B 2 pyrrhops & 0 0 0 2 ardens & 0 0 0 pallidus & 0 0 0 . K ((: + +; B A 2 K tadungensis & 0 0 0 K : +); B 2Published as part of Rowley, Jodi J. L., Tran, Dao T. A., Le, Duong T. T., Dau, Vinh Q., Peloso, Pedro L. V., Nguyen, Truong Q., Hoang, Huy D., Nguyen, Tao T. & Ziegler, Thomas, 2016, Five new, microendemic Asian Leaf-litter Frogs (Leptolalax) from the southern Annamite mountains, Vietnam, pp. 63-102 in Zootaxa 4085 (1) on pages 75-86, DOI: 10.11646/zootaxa.4085.1.3, http://zenodo.org/record/105245
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