20,477 research outputs found
Brevivalvala Dai, Qu & Yang, 2016, gen. nov.
No full textBrevivalvala gen. nov. Type species: Brevivalvala melanosticta Dai, Qu &Yang sp. nov. Description. Body color. Background yellow to brown with dark brown irrorate markings. Morphology. Head distinctly narrower than pronotum, discal portion of crown glabrous; slightly produced in dorsal view; crown midlength longer than next to eyes; anterior margin of head with two transverse striations. Pronotum not exceeding eyes anteriorly, lateral margin carinate, lateral margin longer than basal width of eye. Lorum wider than clypellus near base. Antennal base near middle of eye; antennal ledge weakly carinate. Clypellus widening apically. Ocelli present, close to eyes, on anterior margin of head. Forewing with four apical cells and three subapical cells, inner subapical cell open (second m-cu crossvein absent) and outer one short, without crossvein between claval veins (Fig. 5). Male genitalia. Pygofer lobes narrowly rounded posteriorly; with macrosetae; without processes (Fig. 6). Valve very short (Fig. 7). Subgenital plate apices narrow, elongate; few short fine setae at subbase laterally; without macrosetae (Fig. 7). Style broad at base, abruptly narrowing subapically, preapical lobe with fine setae, apex short (Fig. 8). Connective Yshaped; broad and short (Fig. 11). Aedeagus laterally compressed; with one pair of ventral processes; gonopore apical (Figs 9, 10). Distribution. Oriental region (China). Remarks. The new genus is very similar to Phlepsius Fieber, 1866 with the connective (Fig. 11; Zahniser & Dietrich, 2013, Fig. 46 J) with stem short but can be easily distinguished from Phlepsiu s and other genera of the tribe by the aedeagal shaft with a pair of processes (Fig. 9), the short valve (Fig. 7), the subgenital plate without macrosetae (Fig. 7) and with apices elongate, and style with short apophysis (Fig. 8). Etymology. The new genus name is derived from the Latin word “ Brevi- ” (short) and “ valvala ” (valve), referring to the short valve.Published as part of Dai, Ren-Huai, Qu, Ling & Yang, Mao-Fa, 2016, First record of the tribe Phlepsiini (Hemiptera: Cicadellidae: Deltocephalinae) from China, with description a new genus and species, pp. 81-84 in Zootaxa 4107 (1) on pages 81-82, DOI: 10.11646/zootaxa.4107.1.4, http://zenodo.org/record/25970
An Interflow between Yang-Ping and Qu : in comparison with an interflow between Shang and Qu
No full textA total of 333 characters have been found in the interflow between the tones Yang-Ping and Qu ; 75 of which, also involve Shang, making it a three-way interflow. The changes from Qu to Yang-Ping have a completion rate of 62. 1 % and a reversal rate of 10.3 %, as compared to the 21.9 % of completion rate and 50.0 % of reversal rate for changes from Yang-Ping to Qu. These are indications that Qu -> Yang-Ping change was not only the more dominant move but also an earlier move. The wave of changes that began at earlier times not only shows a higher rate of completion but also exerted pressure on changes in the opposite direction, making them turn back halfway.L'auteur montre qu'au total 333 caractères aux tons Yang-Ping et Qu ont évolués entre le chinois ancien et le chinois moderne de Pékin. Ceci confirme les résultats d'autres auteurs sur les changements de ton et nous autorise à nous poser la question de la validité des règles phonétiques universellement acceptées, qui auraient régi jusqu'à aujourd'hui l'évolution tonale de la langue incluant les transitions du ton Ru.Chen Chung-yu. An Interflow between Yang-Ping and Qu : in comparison with an interflow between Shang and Qu. In: Cahiers de linguistique - Asie orientale, vol. 24 1, 1995. pp. 97-138
Brevivalvala melanosticta Dai, Qu & Yang, 2016, sp. nov.
No full textBrevivalvala melanosticta sp. nov. (Figs 1–12) Body length. (including tegmina): ♂, 6.0–7.0 mm. Description. Body color. Dark brown with brown and dark brown patches (Figs 1–5). Costal margin of forewing (Fig. 5) with a black spot in distal 1 / 3. Face (Fig. 3) brown with yellow spots and short transverse band. Vertex with brown median transverse line. Morphology. Head (Fig. 1) including eyes slightly narrower than pronotum; fore margin (Figs 1–2, 4) slightly produced anteriorly with two transverse striations; crown with midlength approximately 1.5 times as long as next to eyes. Ocelli (Figs 2–3) situated on fore margin of vertex, not visible in dorsal view, its diameter equal to distance between ocellus to adjacent eye. Clypellus (Fig. 3) slightly broad at base, expanding apically; antennal (Fig. 3) bases located near middle of eyes. Profemur (Fig. 12) IC row with long fine setae; AV row with about 10 stout and short setae; AM 1 with only one strong and long seta; fore tibia with dorsal setal formula 1 + 5. Hind tibia with 11 setae of AV row, 19 setae of AD row, PV row and AV row with numerous setae; first tarsomere with five platellae and second tarsomere with four. Male genitalia. Male pygofer lobe (Fig. 6) dorsal margin sinuated; caudodorsal part elongated, distal half with numerous long macrosetae. Valve (Fig. 7) short, bandlike, anterior margin sinuated. Subgenital plate (Fig. 7) broad at basal 1 / 4, then gradually tapered to elongate subacute apex and fingerlike. Style (Fig. 8) with lateral corner of base elongated; concave at middle of outer edge with several fine, short setae. Connective (Fig. 11) Y-shaped, stem short. Aedeagal shaft (Figs. 9, 10) compressed and tapered about from at basal 1 / 4 to apical 3 / 4 in lateral view with pair of ventral spines arising on apical 1 / 5 and extended distad, not exceeding apex of shaft; dorsal apodeme elongated; gonopore apical on ventral surface of shaft. Female. Unknown. Material examined. Holotype, ♂, CHINA: Yunnan Province, Tongbiguan Provincial Natural Reserve, 3 -VI- 2011, coll. Li Yujian; Paratypes, 2 ♂♂, Yunnan Province, Gaoligong National Natural Reserve, Baihualing, 13 -VI- 2012, coll. Long Jiankun (GUGC). Distribution. China (Yunnan Province). Etymology. The new species name is an adjective derived from a composite of the Greek words “melano” (black) and “sticto” (spotted), indicating that the costal margin of forewing (Fig. 5) with a black spot at distal 1 / 3.Published as part of Dai, Ren-Huai, Qu, Ling & Yang, Mao-Fa, 2016, First record of the tribe Phlepsiini (Hemiptera: Cicadellidae: Deltocephalinae) from China, with description a new genus and species, pp. 81-84 in Zootaxa 4107 (1) on pages 82-83, DOI: 10.11646/zootaxa.4107.1.4, http://zenodo.org/record/25970
Bhatia longiradiata Yu & Qu & Dai & Yang 2019, sp. nov.
No full textBhatia longiradiata sp. nov. (Fig. 1) Measurement. Length (including tegmen): (holotype), 7.0 mm. Description. Body pattern yellowish brown. Head with eyes faint brown (Fig. 1c); ocelli separated by about 4x distance from ocelli to adjacent eyes (Fig. 1a); antenna situated near upper corner of eye; anteclypeus flat and broad at base (Fig. 1c). Pronotum shorter than crown, with pair of black spots submarginally and straight lateral carinae. Scutellum yellowish with pair of semicircular brown markings; suture distinct and arched forward. Forewings opaque, veins yellow and anterior margin yellowish (Fig. 1a). Hind femur with apical setae 2+2+1. Male genitalia. Pygofer side rounded with numerous setae, with notch in middle of ventral margin (Fig. 1d). Valve nearly pentagonal. Subgenital plate broad at base, narrowing at middle, without macrosetae, only with few marginal fine setae (Fig. 1e). Connective short and H-shaped (Fig. 1f), slightly curved in profile (Fig. 1g). Style slender, broad at base, curved laterally and acute to apex (Fig. 1h). Aedeagal shaft tubulose, short moderately, curved dorsad with single elongate ventral processes in lateral view, forked and expanded in middle, extending to approximately 2x length of aedeagal shaft in dorsal view (Fig. 1i). Gonopore apical. Material examined Holotype, ♂, China: Guangdong province, Huizhou city, Mt. Xiangtou, 18. V. 2013, collected by Meng Jiao & Bin Li. Paratype, 1♂, China, Guangxi Zhuang Autonomous Region, Rongshui village, Yangmei depression, 12. VII. 2015, collected by Hongping Zhan. Distribution. China (Guangdong, Guangxi). Etymology. The new species name is derived from the Latin word “ longiradiate ”, referring to the aedeagal has a elongate forked processes. Remarks. This species is similar to B. satsumensis but can be distinguished from the latter by the aedeagus shaft without processes and with the shaft short and triangular in dorsal view.Published as part of Yu, Zhou, Qu, Ling, Dai, Ren-Huai & Yang, Mao-Fa, 2019, Key to species of the leafhopper genus Bhatia Distant, 1908 (Hemiptera: Cicadellidae: Drabescini) with description of a new species from China, pp. 142-146 in Zootaxa 4624 (1) on page 143, DOI: 10.11646/zootaxa.4624.1.11, http://zenodo.org/record/325844
Modelling vortex-induced vibrations with a single wake oscillator coupled to both cross-flow and in-line motions
No full textVortex-induced vibration or as well-known as VIV is a phenomenon that has caught the attention of engineers along history. VIV is related to many engineering fields. In the offshore industry, it is of importance for risers that extract oil from the subsoil, and tethered anchors for floating units.The main aim of the thesis is to model the VIV phenomenon through a new version of the wake oscillator model by Qu,2019. This modified model includes a new in-line coupling term that is introduced in the wake equation of motion. Apart from having a new in-line coupling term in the wake equation of motion, the model also includes a coupling term that relates the lift force with the fluctuating force in the in-line direction. In order to analyze the performance of the modified wake oscillator model, it was required to understand the advantages and drawbacks of some models that were implemented before.During the investigation, four main steps were followed: 1. The performance of the equation of The Van der Pol oscillator to model the VIV phenomenon was explored. 2. Analysis and identification of advantages and drawbacks on the wake oscillator model by Ogink and Metrikine,2010, the one without in-line coupling, were conducted. This wake oscillator model was used to model a rigid cylinder elastically supported in free oscillation experiments.3. The modified wake oscillator model (Qu,2019) was used to model a rigid cylinder in free oscillation experiments and in forced in-line vibration experiments. 4. Performing a sensitivity analysis in the new model.After analyzing the behavior of the new model, it was concluded that adding a coupling term in the wake equation of motion was helpful to improve the phenomenological modelling of coupled cross-flow and in-line vortex-induced vibrations of an elastically supported cylinder in fluid flow during free oscillation experiments. However, for the case of forced in-line vibration experiments, discrepancies between the model results and experimental measurements were observed. A more in-depth study on the simulation of forced vibration experiments is recommended to further improve the wake oscillator model.Offshore and Dredging Engineerin
Parabolopona basispina Dai, Qu & Yang 2016
No full textP. basispina Dai, Qu & Yang, 2016: 394–396, figs. 1A–D, 2A–G. Holotype: male. Distribution: China.Published as part of Xu, Deliang & Zhang, Yalin, 2020, Taxonomy of the Oriental leafhopper genus Parabolopona (Hemiptera: Cicadellidae: Deltocephalinae: Drabescini) with a new species from China, pp. 189-195 in Zootaxa 4821 (1) on page 190, DOI: 10.11646/zootaxa.4821.1.12, http://zenodo.org/record/439824
A Profile of Fatherhood Among Young Men: Moving Away from Their Birth Family and Closer to Their Child.
No full textHave things changed all that much in terms of how fatherhood is conceptualized and exercised in daily life? That is the question underlying this article. The author compares the findings of a recent analysis on certain aspects of the lived experiences of young fathers (under 25 years of age) with the results of studies undertaken over the past ten years, and replies in the affirmative. First of all, when considering the representations held of fathers or mothers, most of these young fathers believe that their role is a multi-faceted one, and that it is often identical to that of their spouse. According to young fathers, fatherhood is a dual experience that requires them to be present on a daily basis while also casting their eye on the future. This is an experience that is constructed out of affectionate moments, child-care duties, education in the literal sense, and especially out of shared experiences with their spouse. In addition, they question the degree to which involvement in a career should take precedence over involvement in their child's life. In other words, the former 'competes' with their ability to be present in their child's daily life, which denotes a change from the attitudes of previous generations.Fatherhood, Young Fathers, Representation, Paternal Identity, Qualitative Research
Iodine-assisted antisolvent engineering for stable perovskite solar cells with efficiency >21.3 %
No full textThe quality of the photoactive film is a significant factor in determining the power conversion efficiency (PCE) and the stability of perovskite solar cells (PSCs). We report a simple upgraded antisolvent washing treatment using iodine modulation, which significantly improves the MAPbI3 films with high crystallinity and chemical uniformity. A detailed model for improving the mechanism is proposed to describe how the upgraded antisolvent enhances both the perovskite crystallization and passivates the under-coordinated Pb2+ dangling bond. PSCs fabricated with the FTO/TiO2/MAPbI3/Spiro-OMeTAD/Ag architecture used high quality films with less defective surfaces, present a PCE of 21.33%, retaining 91% of its initial value in ambient without any encapsulation after 30 days. These results provide insight into the surface defect passivation process achieved by halide ions balance while providing a simple and efficient process that can be extensively used to fabricate high-quality perovskite films
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