15,643 research outputs found
Dataset for Accurate Inverse Design of Fabry–Pérot-Cavity-Based Color Filters far beyond sRGB via a Bidirectional Artificial Neural Network
No full textData to support article "Accurate inverse design of Fabry–Perot-cavity-based color filters far beyond sRGB via a bidirectional artificial neural network". Peng Dai, Yasi Wang, Yueqiang Hu, C. H. de Groot, Otto Muskens, Huigao Duan, and Ruomeng Huang. PHOTONICS Research. 10.1364/PRJ.415141</span
Analysis of the Cambodian bagnet ("dai") fishery data
No full textThis report summarises general and detailed features of catches from the bagnet ("dai") fishery in Cambodia between 1995 and 1999, as monitored by the MRC/DoF/DANIDA Management of the Freshwater Capture Fisheries Project (MFCFP) in Phnom Penh.Fishery data, Cambodia,
Images of the Dai : the aesthetics of gender and identity in Xishuangbanna
No full textThis thesis is based on fieldwork carried out m Xishuangbanna Dai Autonomous Prefecture, Yunnan Province, China. The main focus of the work is the Dai people, one of China's fifty-five so called 'Minority Nationalities'. I aim to paint a picture of the complex processes through which Dai ways of being and images of them are created and recreated. This is not to suggest that the Dai constitute a bounded group. Although Chinese official discourse presents a static, rigid picture of the so-called 'Minority Nationalities', I hope to have demonstrated that the everyday experiences of those in Banna are governed by a fluid and dynamic relationality. Images of 'Minority Nationalities' abound in China, these images are multiple and often contradictory. The Dai are known throughout China for their beauty, a beauty often portrayed as highly erotic. In this thesis I explore the implications of this image and the role of the Dai in its formation and continuity. With this in mind I examine the ways that the striking Dai aesthetic is used in the intricate power plays of Xishuangbanna. This work examines aspects of the Dai lived aesthetic and as such it has chapters on tattoo, architecture and feminine beauty. Dai aesthetic knowledge is interlaced with strands of moral, philosophical and cosmological insight, thus this work also includes a chapter on morality, autonomy and cooperation. The penultimate chapter uses vivid ethnography of the Water Splashing festival as a example of play of identities in Xishuangbanna. The Conclusion reiterates that the processes by which images, identities and aesthetic understandings are generated, and by which limits are explored and transgressed in Xishuangbanna are dialogic in character
“Ubiquitous uncertainties”: spillovers across economic policy uncertainty and cryptocurrency uncertainty indices
No full textPurpose The purpose of this paper is to extend the literature on the spillovers across economic policy uncertainty (EPU) and cryptocurrency uncertainty indices. Design/methodology/approach This paper uses cross-country economic policy uncertainty indices and the novel data measuring the cryptocurrency price uncertainties over the period 2013-2021 to construct a sample of 946 observations and applies the time-varying parameter vector autoregression (TVP-VAR) model to do an empirical study. Findings The findings suggest that there are cross-country spillovers of economic policy uncertainty. In addition, the total uncertainty spillover between economic policies and cryptocurrency peaked in 2015 before gradually decreasing in the following periods. Concomitantly, the cryptocurrency uncertainty has acted as the "receiver." More importantly, the authors found the predictive power of economic policy uncertainty to predict the cryptocurrency uncertainty index. This paper's results hold robust when using alternative measurement of cryptocurrency policy uncertainty. Originality/value This study is the first research that deeply investigates the association between two uncertainty indicators, namely economic policy uncertainty and the cryptocurrency uncertainty index. We provide fresh evidence about the dynamic connectedness between country-level economic policy uncertainty and the cryptocurrency index. Our work contributes a new channel driving the variants of uncertainties in the cryptocurrency market
Inverse design of structural colour devices via machine learning
No full textThe thesis investigates the field of structural colour inverse design, with potential applications in display, anti-counterfeiting, and full-colour nanoprinting. In the conventional structural colour design, the colours are designed by sweeping the structure parameters. Nevertheless, this manner can only produce limited distinct colours, which hardly satisfy the real-world requirements, due to the finite computation resources. An on-demand inverse design method is, hence, crucial in the structural colour inverse design. Thanks to the fast development of data-driven machine learning in the past decades, the deep learning model, after experiencing a training process, is able to fit any function, making it a strong candidate in the structural colour on-demand inverse design. Our research explores the use of deep learning in accurate and diverse structural colour inverse design. A novel loss function defined in the uniform CIELAB colour space is first proposed to improve the deep learning training efficiency, which is different from the conventional usage of nonuniform CIEXYZ colour space. By employing a tandem network, the new loss function presents obvious accuracy superiority in the inverse design of transmissive Ag-SiO2-Ag Fabry-Perot cavity structural colour, obtaining an average ∆E of 1.2 in the test sets. The work also revealed the limitations of the tandem network in flexibility, while applying the inverse design of reddish colours. This problem was subsequently tackled by introducing a cGAN-based inverse design approach into the parameter-based structural colour inverse design. Based on the distribution control ability, cGAN is able to force the designs to spread the entire solution space, producing an average ∆E of 0.44 and an average solution group of 3.66 in the test set, which exhibits remarkable structural colour inverse design accuracy and diversity. The study also extends the developed cGAN-based method for the VO2-based dynamic structural colour inverse design, in which an average ∆E of 0.98 is achieved. By using the ability of cGAN to identify multiple solutions, temperature-induced information encryption is implemented. Furthermore, this technique was utilised for the inverse design of all-dielectric metasurface structural colour to evaluate its universality and effectiveness. The reliability of the cGAN-designed metasurface was valid via a series of numerical simulations, proving that the cGAN had an average ∆E of 0.41. Additionally, the inverse design of Lorentzian line shapes in visible ranges was successfully conducted by employing colour as an intermediary to broaden the potential applications of the cGAN-based inverse design method in versatile optical design. The PhD project analyses the challenges of current popular inverse design methods and proposes a novel cGAN-based inverse design approach for structural colour. We expect that the findings of the thesis can deepen the understanding between nanostructure and structural colour and make contributions to future research and applications in photonic inverse design
First report on Paratischeria from Asia (Lepidoptera: Tischeriidae)
No full textXu, Jiasheng, Dai, Xiaohua, Liu, Peng, Bai, Haiyan, Diškus, Arūnas, Stonis, Jonas R. (2017): First report on Paratischeria from Asia (Lepidoptera: Tischeriidae). Zootaxa 4350 (2): 331-344, DOI: 10.11646/zootaxa.4350.2.
Paederus daicongchaoi Peng
No full textPaederus daicongchaoi Peng and L.-Z. Li, new species (Figs 1 A, 1D, 2) Type material. HOLOTYPE: Ƌ, labeled ‘ China: Anhui Prov., Yuexi County, Yaoluoping, Duozhijian, 30°58'383'' N 116°09'59'' E, 1650 m, 19.VI.2013, Peng & Dai leg.’ (SNUC). Paratypes: 1 ♀, same label data as holotype (SNUC). Description. Measurements (in mm) and ratios: BL: 8.95–9.62; FL: 4.23–4.45; HL: 1.29–1.32; HW: 1.50– 1.51; AnL: 2.97–3.14; PL: 1.51–1.59; PW: 1.51–1.55; EL: 0.91–0.93; EW: 1.52–1.59; AW: 1.78–1.81; AL: 2.08; HL/HW: 0.86–0.87; HW/PW: 0.97–0.99; HL/PL: 0.83–0.85; PL/PW: 1.00–1.02; EL/PL: 0.58–0.60; diameter of eye: 0.38–0.43. Habitus as in Fig. 1 A. Coloration: head and labrum black, labial palpi and antennae yellowish brown; pronotum brownish red; elytra metallic-blue; legs yellowish brown; abdomen bicoloured with segments III-VI brownish red and segments VII-X black. Head wider than long, widest across eyes; punctation coarse and sparse; interstices glossy. Eyes distinctly convex. Antenna as in Fig. 1 D. Pronotum nearly oviform, strongly convex in cross-section; punctures sparser and somewhat shallower than those of head. Elytra trapeziform; punctation coarse, defined and dense. Hind wings reduced. Metatarsomere I as long as combined length of metatarsomeres II and III. Abdomen distinctly broader than elytra; punctation moderately coarse; interstices with shallow microsculpture; posterior margin of tergite VII without palisade fringe. Male. Labrum (Fig. 2 D) with deeply excavate anterior margin. Posterior margin of tergite VIII (Fig. 2 E) broadly convex; sternite VII unmodified; sternite VIII (Fig. 2 F) with deep posterior incision, this incision approximately 0.5 times as long as sternite VIII; aedeagus as in Figs 2 G–I; dorsal plate broad; parameres asymmetric and slender; internal sac with three strongly sclerotized spines of characteristic shapes. Female. Labrum as in Fig. 2 A. Posterior margin of tergite VIII (Fig. 2 B) convex; posterior margin of sternite VIII (Fig. 2 C) strongly convex. Comparative notes. Based on the structure of the aedeagus, this species is allied to P. describendus Willers, 2001 (Zhejiang: Tianmu Shan), from which it is distinguished by the somewhat stouter pronotum, the deeply excavate anterior margin of the male labrum, the longer parameres and three strongly sclerotized spines in the internal sac of the aedeagus and particularly the shape of the female sternite VIII. For illustrations of P. describendus see Willers (2001b: figures 9–12). Distribution and natural history. The type locality is in the Yaoluoping to the northwest of Yuexi, western Anhui. The specimens were sifted from leaf litter from the floor of a pine forest at an altitude of 1650 m. Etymology. The species is named after Cong-Chao Dai, the first author’s bosom friend, who collected the type specimens.Published as part of Li, Qi-Li, Li, Li-Zhen, Gu, Fuang-Kang & Peng, Zhong, 2016, New data on brachypterous Paederus (Coleoptera, Staphylinidae) of mainland China, pp. 576-588 in Zootaxa 4184 (3) on page 577, DOI: 10.11646/zootaxa.4184.3.11, http://zenodo.org/record/16508
Comparison between a phenomenological approach and a morphoelasticity approach regarding the displacement of extracellular matrix
No full textPlastic (permanent) deformations were earlier, modeled by a phenomenological model in Peng and Vermolen (Biomech Model Mechanobiol 19(6):2525–2551, 2020). In this manusctipt, we consider a more physics-based formulation that is based on morphoelasticity. We firstly introduce the morphoelasticity approach and investigate the impact of various input variables on the output parameters by sensitivity analysis. A comparison of both model formulations shows that both models give similar computational results. Furthermore, we carry out Monte Carlo simulations of the skin contraction model containing the morphoelasticity approach. Most statistical correlations from the two models are similar, however, the impact of the collagen density on the severeness of contraction is larger for the morphoelasticity model than for the phenomenological model.Numerical Analysi
How does climate policy uncertainty affect financial markets? Evidence from Europe
No full textThis study analyzes the time-varying effect of climate policy uncertainty (CPU) on the stock market and clean energy indices in the European context. For this purpose, we use the Bayesian time-varying parameter VAR model. The empirical results show that CPU shocks have a significant effect on the financial indexes. Returns on clean energy (crude oil) stocks increase (decrease) in response to heightened climate risk. Moreover, the COVID-19 pandemic is a relevant tipping point in CPU dynamics. These results offer important implications for European investors and policymakers in the context of the European climate-energy crisis
Cesiribacter roseus sp. nov., a pink-pigmented bacterium isolated from desert sand
No full textMing Liu, Huan Qi, Xuesong Luo, Jun Dai, Fang Peng and Chengxiang Fang (2012): Cesiribacter roseus sp. nov., a pink-pigmented bacterium isolated from desert sand. International Journal of Systematic and Evolutionary Microbiology 62: 96-99, DOI: 10.1099/ijs.0.028423-
- …
