73,007 research outputs found
Q and A with Winnie M Li on Complicit
No full text‘Like the best filmmakers, Li draws you to the edge of your seat and keeps you there’. Following Winnie M Li’s debut novel Dark Chapter, winner of the Not the Booker Prize 2017, Complicit is her new thriller that follows protagonist Sarah Lai as she reflects on her past experiences of silence, suppression and abuse in the film industry. We speak to Winnie M Li about writing the novel, delving into workplace practices and webs of complicity, the power of fiction for social justice movements and the need for spaces of collective healing. Q&A with Winnie M Li on Complicit. Orion Books (UK)/Atria Books (US). 2022
Few-layered MoS2 as a saturable absorber for a passively Q-switched Er: YAG laser at 1.6 mu m
No full text
The passively Q-switched Er: YAG laser at 1.6 mu m was achieved with a YAG-based MoS2 saturable absorber (SA) for the first time. The saturable absorption properties of the MoS2 SA near 1.6 mu m were investigated. Under an absorbed pump power of 8.09 W, an average output power of 1.08 W with a pulse duration of 1.138 mu s and a repetition rate of 46.6 kHz was obtained, corresponding to an optical conversion efficiency of 40.67%. The pulse energy and peak power were calculated to be 23.08 mu J and 20.28 W, respectively. (C) 2017 Optical Society of America</p
q-Differential equations for q-classical polynomials and q-Jacobi-Stirling numbers
Get PDFWe introduce, characterise and provide a combinatorial interpretation for the so-called q-Jacobi–Stirling numbers.
This study is motivated by their key role in the (reciprocal) expansion of any power of a second order
q-differential operator having the q-classical polynomials as eigenfunctions in terms of other even order operators,
which we explicitly construct in this work. The results here obtained can be viewed as the q-version of
those given by Everitt et al. and by the first author, whilst the combinatorics of this new set of numbers is a
q-version of the Jacobi–Stirling numbers given by Gelineau and the second author
Interfacial “Single-Atom-in-Defects” Catalysts Accelerating Li+ Desolvation Kinetics for Long-Lifespan Lithium-Metal Batteries
Get PDFThe lithium-metal anode is a promising candidate for realizing high-energy-density batteries owing to its high capacity and low potential. However, several rate-limiting kinetic obstacles, such as the desolvation of Li+ solvation structure to liberate Li+, Li0 nucleation, and atom diffusion, cause heterogeneous spatial Li-ion distribution and fractal plating morphology with dendrite formation, leading to low Coulombic efficiency and depressive electrochemical stability. Herein, differing from pore sieving effect or electrolyte engineering, atomic iron anchors to cation vacancy-rich Co1−xS embedded in 3D porous carbon (SAFe/CVRCS@3DPC) is proposed and demonstrated as catalytic kinetic promoters. Numerous free Li ions are electrocatalytically dissociated from the Li+ solvation complex structure for uniform lateral diffusion by reducing desolvation and diffusion barriers via SAFe/CVRCS@3DPC, realizing smooth dendrite-free Li morphologies, as comprehensively understood by combined in situ/ex situ characterizations. Encouraged by SAFe/CVRCS@3DPC catalytic promotor, the modified Li-metal anodes achieve smooth plating with a long lifespan (1600 h) and high Coulombic efficiency without any dendrite formation. Paired with the LiFePO4 cathode, the full cell (10.7 mg cm−2) stabilizes a capacity retention of 90.3% after 300 cycles at 0.5 C, signifying the feasibility of using interfacial catalysts for modulating Li behaviors toward practical applications
Kockovaella haikouensis Q. M. Wang, F. Y. Bai & A. H. Li 2020, sp. nov.
No full text<p> <i>Kockovaella haikouensis</i> Q.M. Wang, F.Y. Bai & A.H. Li <i>sp. nov.</i> MycoBank MB828736. Fig. 7A, B.</p> <p> <i>Etymology</i>: the specific epithet <i>haikouensis</i> refers to the geographic origin of the type strain, Haikou county, Hainan.</p> <p> <i>Culture characteristics</i>: In YM broth, after 7 d at 17 °C, cells are ellipsoidal or ovoid, 1.8 –3.5 × 2.5– 5.0 μm and single, budding is polar (Fig. 7A), a sediment is formed. After 1 mo at 17 °C, a ring and sediment are present. On YM agar, after 1 mo at 17 °C, the streak culture is yellowish-cream, butyrous, smooth and glistening. The margin is entire. In Dalmau plate culture on CM, pseudohyphae are not formed. Sexual structures are not observed on YM, PDA, V8 and CM agar. Ballistoconidia are ellipsoidal or some what kidney-shaped, 3.3 –5.0 × 5.0–8.3 μm (Fig. 7B).</p> <p> <i>Physiological and biochemical characteristics</i>: Glucose fermentation is absent. Glucose, galactose, sucrose, maltose, cellobiose, trehalose, lactose, melibiose, raffinose, melezitose, soluble starch (variable), D-xylose (variable), L-arabinose (variable), D-ribose, D-glucosamine, N-Acetyl-D-glucosmine, ethanol (variable), glycerol (variable), erythritol (variable), ribitol (variable), galactitol, D-mannitol, methyl α- D-glucoside, salicin, DLlactate(variable), succinate (variable) are assimilated as sole carbon sources. L-sorbose, inulin, D-arabinose, L-rhamnose, methanol, D-glucitol, citrate, myo-inositol and hexdecane are not assimilated. Ammonium sulfate, L-lysine (variable), ethylamine hydrochloride (delayed) and cadaverine dihydrochloride are assimilated as sole nitrogen sources. Potassium nitrate and sodium nitrite are not assimilated. Maximum growth temperature is 30 °C. Growth in vitamin-free medium is positive. Starch-like substances are not produced. Growth on 50 % (w/w) glucose-yeast extract agar is negative. Urease activity is positive. Diazonium Blue B reaction is positive. The major ubiquinone is Q-10.</p> <p> Physiologically, <i>Koc. haikouensis</i> differs from the closely related species <i>Koc. ischaemi</i> in its inability to assimilate inulin, D-arabinose, L-rhamnose and sodium nitrite and its ability to assimilate ethylamine (Table S1.1).</p> <p> <i>Typus</i>: <b>China</b>, Haikou county, Hainan province, obtained from a leaf of an unidentified plant, Nov. 2006, Q.-M. Wang (<b>holotype</b> CGMCC 2.3443 T preserved in a metabolically inactive state, ex-type CBS 15478 = HKX2).</p>Published as part of <i>Li, A. - H., Yuan, F. - X., Groenewald, M., Bensch, K., Yurkov, A. M., Li, K., Han, P. - J., Guo, L. - D., Aime, M. C., Sampaio, J. P., Jindamorakot, S., Turchetti, B., Inacio, J., Fungsin, B., Wang, Q. - M. & Bai, F. - Y., 2020, Diversity and phylogeny of basidiomycetous yeasts from plant leaves and soil: Proposal of two new orders, three new families, eight new genera and one hundred and seven new species, pp. 17-140 in Studies In Mycology 96</i> on page 81, DOI: 10.1016/j.simyco.2020.01.002, <a href="http://zenodo.org/record/10497182">http://zenodo.org/record/10497182</a>
Kockovaella ischaemi Q. M. Wang, F. Y. Bai & A. H. Li 2020, sp. nov.
No full text<p> <i>Kockovaella ischaemi</i> Q.M. Wang, F.Y. Bai & A.H. Li <i>sp. nov.</i> MycoBank MB828738. Fig. 7C, D.</p> <p> <i>Etymology</i>: the specific epithet <i>ischaemi</i> refers to <i>Ischaemum</i>, the plant genus from which the type strain was isolated.</p> <p> <i>Culture characteristics</i>: In YM broth, after 7 d at 17 °C, cells are ellipsoidal or ovoid, 2.0–3.8 × 2.3– 6.2 μm and single or pairs, budding is polar (Fig. 7C), blastoconidia are produced on short stalk-like conidiophores, a sediment is formed. After 1 mo at 17 °C, a ring and sediment are present. On YM agar, after 1 mo at 17 °C, the streak culture is yellowish-cream, butyrous, smooth and glistening. The margin is entire. In Dalmau plate culture on corn meal agar, pseudohyphae are not formed. Sexual structures are not observed on YM, PDA, V8 and CM agar. Ballistoconidia are ellipsoidal or some what kidney-shaped, 2.0–3.7 × 4.2– 6.7 μm (Fig. 7D).</p> <p> <i>Physiological and biochemical characteristics</i>: Glucose fermentation is absent. Glucose, galactose, sucrose, maltose, cellobiose, trehalose, lactose, melibiose, raffinose, melezitose, inulin, soluble starch, D-xylose, L-arabinose, D-arabinose (weak), Dribose, L-rhamnose, D-glucosamine, N-Acetyl-D-glucosamine, glycerol (variable), ribitol (variable), galactitol, D-mannitol, Methyl-α- D-glucoside (variable), salicin (weak), succinate (weak), citrate (variable) and myo-Inositol (variable) are assimilated as sole carbon sources. L-sorbose, methanol, ethanol, erythritol, D-glucitol, DL-lactate and hexadecane are not assimilated. Ammonium sulfate, sodium nitrite and cadaverine dihydrochloride are assimilated as sole nitrogen sources. Potassium nitrate, L-lysine and ethylamine hydrochloride are not assimilated. Maximum growth temperature is 30 °C. Growth in vitamin-free medium is positive. Starch-like substances are not produced. Growth on 50 % (w/w) glucose-yeast extract agar is negative. Urease activity is positive. Diazonium Blue B reaction is positive. The major ubiquinone is Q-10.</p> <p> Physiologically, <i>Koc. ischaemi</i> differs from the closely related species <i>Koc. haikouensis</i> in its inability to assimilate ethylamine and its ability to assimilate inulin, D-arabinose, L-rhamnose and sodium nitrite (Table S1.1).</p> <p> <i>Typus</i>: <b>China</b>, Jinghong, Yunnan province, obtained from a leaf of <i>Ischaemum sp.</i>, Nov. 2006, Q.-M. Wang (<b>holotype</b> CGMCC 2.3565 T preserved in a metabolically inactive state, ex-type CBS 15500 = JH5.17)</p>Published as part of <i>Li, A. - H., Yuan, F. - X., Groenewald, M., Bensch, K., Yurkov, A. M., Li, K., Han, P. - J., Guo, L. - D., Aime, M. C., Sampaio, J. P., Jindamorakot, S., Turchetti, B., Inacio, J., Fungsin, B., Wang, Q. - M. & Bai, F. - Y., 2020, Diversity and phylogeny of basidiomycetous yeasts from plant leaves and soil: Proposal of two new orders, three new families, eight new genera and one hundred and seven new species, pp. 17-140 in Studies In Mycology 96</i> on pages 81-83, DOI: 10.1016/j.simyco.2020.01.002, <a href="http://zenodo.org/record/10497182">http://zenodo.org/record/10497182</a>
High-Q bismuth silicate nonlinear glass microsphere resonators
Get PDFThe fabrication and characterization of a bismuth-silicate glass microsphere resonator has been demonstrated. At wavelengths near 1550 nm, high-modes can be efficiently excited in a 179 µm diameter bismuth-silicate glass microsphere via evanescent coupling using a tapered silica fiber with a waist diameter of circa 2 µm. Resonances with Q-factors as high as were observed. The dependence of the spectral response on variations in the input power level was studied in detail to gain an insight into power-dependent thermal resonance shifts. Because of their high nonlinearity and high- factors, bismuth-silicate glass microspheres offer the potential for robustly assembled fully integrated all-optical switching devices
Polysulfide-mediated solvation shell reorganization for fast Li+ transfer probed by in-situ sum frequency generation spectroscopy
Get PDFUnderstanding of interfacial Li+ solvation shell structures and dynamic evolution at the electrode/electrolyte interface is requisite for developing high-energy-density Li batteries. Herein, the reorganization of Li+ solvation shell at the sulfur/electrolyte interface along with the presence of a trace amount of lithium polysulfides is verified by in-situ sum frequency generation (SFG) spectroscopy together with density functional theory (DFT) calculations. Both the spectroelectrochemical and DFT calculation results reveal a strongly competitive anion adsorption of the polysulfide anion additive against the pristine electrolyte anion on the sulfur cathode surface, reorganizing the interfacial local solvation shell structure facilitating rapid Li ion transfer and conduction. Meanwhile, the evolution of the SFG signals along with the discharging/charging cycle exhibits improved reversibility, indicating the transformation of the inner Helmholtz plane layer into a stable molecular-layer polysulfide interphase rather than a dynamic diffusion layer. Consequently, applications in practical Li-S batteries reveal the capacity and cycling stability of the corresponding cells are significantly enhanced. Our work provides a methodology using in-situ SFG for probing solvation reorganization of charge carriers at electrochemical interfaces
Kockovaella nitrophila Q. M. Wang, F. Y. Bai & A. H. Li 2020, sp. nov.
No full text<p> <i>Kockovaella nitrophila</i> Q.M. Wang, F.Y. Bai & A.H. Li <i>sp. nov.</i> MycoBank MB828739. Fig. 7E.</p> <p> <i>Etymology</i>: the specific epithet <i>nitrophila</i> refers to the physiological character of assimilating nitrate.</p> <p> <i>Culture characteristics</i>: In YM broth, after 7 d at 17 °C, cells are subglobosal and ellipsoidal, 2.4 –4.4 × 3.7– 4.5 μm and single, budding is polar (Fig. 7E), a sediment is formed. After 1 mo at 17 °C, a sediment is present. On YM agar, after 1 mo at 17 °C, the streak culture is creamish white, butyrous, smooth. The margin is entire. In Dalmau plate culture on corn meal agar, pseudohyphae are not formed. Sexual structures are not observed on YM, PDA, V8 and CM agar. Ballistoconidia are not produced.</p> <p> <i>Physiological and biochemical characteristics</i>: Glucose fermentation is absent. Glucose, galactose (weak), sucrose, maltose, trehalose, melibiose (weak), raffinose, melezitose, inulin, Dxylose (weak), L-arabinose (weak), D-arabinose (weak), Dribose (weak) and DL-lactate (weak) are assimilated as sole carbon sources. L-sorbose, cellobiose, lactose, soluble starch, L-rhamnose, D-glucosamine, N-Acetyl-D-glucosamine, methanol, ethanol, glycerol, erythritol, ribitol, galactitol, D-mannitol, D-glucitol, Methyl-α- D-glucoside, salicin, succinate, citrate, myo-inositol and hexadecane are not assimilated. Ammonium sulfate, potassium nitrate, L-lysine (weak), ethylamine hydrochloride (weak) and cadaverine dihydrochloride (weak) are assimilated as sole nitrogen sources. Sodium nitrite is not assimilated. Maximum growth temperature is 37 °C. Growth in vitamin-free medium is positive (weak). Starch-like substances are not produced. Growth on 50 % (w/w) glucose-yeast extract agar is negative. Urease activity is positive. Diazonium Blue B reaction is positive. The major ubiquinone is Q-10.</p> <p> Physiologically, <i>Koc. nitrophila</i> differs from its five closely related species, <i>Koc. ischaemi</i>, <i>Koc. haikouensis</i>, <i>Koc. sacchari</i>, <i>Koc. thailandica</i> and <i>Koc. imperatae</i>, in its inability to assimilate cellobiose, melibiose, D-glucosamine, N-Acetyl-D-glucosamine and D-mannitol and its ability to assimilate potassium nitrate (Table S1.1).</p> <p> <i>Typus</i>: <b>China</b>, Wuzhishan mountain, Hainan province, obtained from a leaf of an unidentified plant, Nov. 2006, Q.-M. Wang (<b>holotype</b> CGMCC 2.3465 T preserved in a metabolically inactive state, ex-type CBS 15487 = WZS12.1).</p>Published as part of <i>Li, A. - H., Yuan, F. - X., Groenewald, M., Bensch, K., Yurkov, A. M., Li, K., Han, P. - J., Guo, L. - D., Aime, M. C., Sampaio, J. P., Jindamorakot, S., Turchetti, B., Inacio, J., Fungsin, B., Wang, Q. - M. & Bai, F. - Y., 2020, Diversity and phylogeny of basidiomycetous yeasts from plant leaves and soil: Proposal of two new orders, three new families, eight new genera and one hundred and seven new species, pp. 17-140 in Studies In Mycology 96</i> on page 83, DOI: 10.1016/j.simyco.2020.01.002, <a href="http://zenodo.org/record/10497182">http://zenodo.org/record/10497182</a>
A review of the modeling approaches of the lightning M-component with special attention to their current and electric field characteristics
Get PDFIn this paper, we present the characteristics of current, electric fields and modeling approaches of lightning M -component mode of charge transfer. We consider both the classical M-components (occurring after return strokes) and M-component-type ICC (Initial Continuous Current) pulses occurring during the initial (ICC) phase of upward flashes. M-component-type ICC pulses can be distinguished from mixed-mode pulses using different criteria: (i) the 10-90% current risetime at the channel-base with respect to an 8-mu s risetime; (ii) the time lag between the onset of the current and electric fields with a respect to a threshold of 10 mu s; (iii) an asymmetrical waveform coefficient (AsWc) with respect to a value of 0.8; (iv) the relative height of the junction or connection points on the grounded channel above the ground. The features of M-component electric field waveforms are summarized for close, intermediate, and far distance ranges. The observed millisecond-scale slow-part pulse shows a polarity reversal from an initial-negative waveform at close range, to a full positive-flattening late-time response at intermediate range and a bipolar wave-shape at the far distance range. One or some microsecond -scale fast pulses (junction pulse) are observed to precede the millisecond-scale slow part pulse at intermediate and far distance ranges. The microsecond-scale fast pulses are dominated by unipolar pulses along with several cases of bipolar pulses exhibiting initial polarities of both signs. The main advantage of the guided wave model and its variations is their simplicity and straightforward implementation. The guided wave model is also able to reproduce reasonably well the observed slow electric fields. The nonlinear models are more physics-based compared to the guided wave models. They are based on an important number of adjustable parameters, many of which cannot be directly inferred from experimental observations. The significance of M-components is reviewed according to practical aspects in transformer secondary, surge protective devices (SPD), grounding systems
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