10,955 research outputs found
Hedonic Prices and House Numbers: The Influence of Feng Shui
No full textIn contemporary practice, feng shui incorporates a wide range of concepts considered to affect a person’s luck. These include traditional ideas about site selection and building design, as well as newer beliefs about the “luckiness” of certain numbers. Focusing on an area with a relatively high percentage of Chinese households in Auckland, New Zealand, this paper uses hedonic price analysis to investigate whether house values are affected by lucky and unlucky numbers. Sales transactions for 1989 to 1996 are used in this analysis. The results demonstrate that lucky house numbers are capitalised into house values.Feng shui, hedonic price model, lucky, New Zealand
Study of the wave packet treatment of neutrino oscillation at Daya Bay
No full textThe disappearance of reactor ν ̄ e observed by the Daya Bay experiment is examined in the framework of a model in which the neutrino is described by a wave packet with a relative intrinsic momentum dispersion σrel. Three pairs of nuclear reactors and eight antineutrino detectors, each with good energy resolution, distributed among three experimental halls, supply a high-statistics sample of ν ̄ e acquired at nine different baselines. This provides a unique platform to test the effects which arise from the wave packet treatment of neutrino oscillation. The modified survival probability formula was used to fit Daya Bay data, providing the first experimental limits: 2.38 × 10 - 17< σrel< 0.23. Treating the dimensions of the reactor cores and detectors as constraints, the limits are improved: 10 - 14≲ σrel< 0.23 , and an upper limit of σrel< 0.20 (which corresponds to σx≳10-11cm) is obtained. All limits correspond to a 95% C.L. Furthermore, the effect due to the wave packet nature of neutrino oscillation is found to be insignificant for reactor antineutrinos detected by the Daya Bay experiment thus ensuring an unbiased measurement of the oscillation parameters sin 22 θ13 and Δm322 within the plane wave model
Achievements and Challenges of Graphene Chemical Vapor Deposition Growth
No full textGraphene, since the first successful exfoliation of graphite, has continuously attracted attention due to its remarkable properties and applications. Recently, the research focus on graphene synthesis has been directed to the controllable synthesis of large-area and high-quality graphene. In the last decade, there has been great progress in the chemical vapor deposition (CVD) growth of graphene. Theoretical investigations have led to an enhanced understanding of puzzles on hydrocarbon species stability, key reaction pathways, the role of hydrogen gas, the morphology of graphene islands, and the alignment of graphene on substrates. Experimentally, high-quality graphene is epitaxially grown on both insulating and metal substrates. Progress has also been reported on low-temperature graphene growth and on controlling the thickness and stacking of graphene layers. In this review, the authors summarize the previous theoretical and experimental studies on graphene CVD growth and discuss the future challenges on the growth of graphene i) on insulating substrates, ii) at low temperature, iii) with controllable thickness, and iv) with selected stacking twist angles. The authors assert that the key to the continuous advancement of graphene growth is the synergy of experimental and theoretical investigations
An Algebraic Inequality, II
No full textIn this article, using inequality between logarithmic mean and one-parameter mean, which can be deduced from monotonicity of the extended mean values, an integral analogue of J. S. Martins’ inequality is proved. An open problem is proposed
Belisana chaoanensis Zhang & Peng, 2011, sp. nov.
No full textBelisana chaoanensis sp. nov. (Fig. 3) Type material. Holotype male, China: Guangdong Province, Chao’an County (23 ° 41 'N, 116 ° 38 'E), Fenghuang Town, 25 May 2010, Shuwen Xing leg.; paratypes: 1 Ƥ, same data as holotype. Etymology. The species name refers to the type locality. Diagnosis. The new species strongly resembles B. aliformis Tong & Li, 2008, but can be distinguished by the shapes of the procursus (Fig. 3 C) and the female internal genitalia (Fig. 3 H), and also by the bulbal hooked apophysis with a small scale (Fig. 3 E). Description. Male (holotype). Total length 1.52 (1.60 with clypeus), carapace length 0.54, width 0.45. Leg I lost, tibia II: 2.18, tibia III: 1.37, tibia IV: 1.91. Habitus as in Fig. 3 A, carapace pale ochre-yellow, brown margins laterally; abdomen ochre-grey, with two pairs of large spots dorsally. Ocular area not elevated, thoracic furrow absent. Clypeus brown, modified with an apophysis forward. Sternum nearly as long as wide (0.57). Chelicerae as in Fig. 3 B, with pair of proximal rounded projections laterally and pair of short frontal apophyses. Legs yellowish without spines and curved hairs, with vertical hairs proximally on all metatarsi. Palps as in Figs 3 C–F, trochanter with short rounded retrolateral apophysis; femur with hump proximo-dorsally; procursus complicated distally, with ventral membranous flap and hooked dorsal spine; bulbal hooked apophysis with a small scale, and embolus complicated. Female: In general similar to male. Tibia I 2.82. Epigynum simple externally (Fig. 3 G), frontally with dark internal semicircular shade. Dorsal view as in Fig. 3 H, with wavy sclerotized arch anteriorly, and a pair of irregular pore plates. Distribution. Known only from the type locality.Published as part of Zhang, Feng & Peng, Yan-Qiu, 2011, Eleven new species of the genus Belisana Thorell (Araneae: Pholcidae) from South China, pp. 51-68 in Zootaxa 2989 on page 55, DOI: 10.5281/zenodo.20130
Epitaxial Growth of 2D Materials on High-Index Substrate Surfaces
No full text© 2021 Wiley-VCH GmbHRecently, the successful synthesis of wafer-scale single-crystal graphene, hexagonal boron nitride (hBN), and MoS2 on transition metal surfaces with step edges boosted the research interests in synthesizing wafer-scale 2D single crystals on high-index substrate surfaces. Here, using hBN growth on high-index Cu surfaces as an example, a systematic theoretical study to understand the epitaxial growth of 2D materials on various high-index surfaces is performed. It is revealed that hBN orientation on a high-index surface is highly dependent on the alignment of the step edges of the surface as well as the surface roughness. On an ideal high-index surface, well-aligned hBN islands can be easily achieved, whereas curved step edges on a rough surface can lead to the alignment of hBN along with different directions. This study shows that high-index surfaces with a large step density are robust for templating the epitaxial growth of 2D single crystals due to their large tolerance for surface roughness and provides a general guideline for the epitaxial growth of various 2D single crystals.11Nsciescopu
Mechanism of MoS2 Growth on a Au(111) Surface: An Ab Initio Molecular Dynamics Study
No full textChemical vapor deposition (CVD) of transition-metal dichalcogenide (TMD) thin films, such as MoS2, on a gold (Au) surface has been regarded as one of the most promising approaches for the mass production of high-quality TMD thin films. However, the mechanism of TMD CVD growth on a gold surface remains a mystery, and many experimental observations, such as the surface chemistry during the initial stage of TMD growth and the formation of T-phase MoS2 on a Au surface, remain unclear. In this study, we systematically explored the initial stage of MoS2CVD growth on a Au(111) surface by using density functional theory-based molecular dynamics simulations. Some critical steps of MoS2 growth, such as the sulfidation of MoO3, the passivation of the Au(111) surface in the S-rich environment, and the lifting of Mo atoms from the Au substrate to form stable MoS2 nuclei, have been revealed in our atomic simulations. The theoretically predicted most stable T-phase small MoS2 clusters agree well with the previous experimental observations. Therefore, with an increase in the size of MoS2, a phase transition from the T phase to the H phase is essential for the growth of highly stable H-phase MoS2 films. This study greatly deepens our understanding of the mechanism of TMD CVD growth on a Au surface and provides guidance for the controllable CVD synthesis of various TMDs
Axinoscymnus pingxiangicus Peng et Chen 2022, sp. n.
No full textAxinoscymnus pingxiangicus Peng et Chen, sp. n. (Figs 1a–h, 13a–g) Diagnosis. This species is similar to A. nigripennis Kamiya in colour pattern but can be separated from the latter by slightly rounded body shape (Fig. 13a), the triangular penis guide in inner view (Fig. 13g) and ventrite 1 with fine punctures at middle (Fig. 13d). In A. nigripennis, it has an elongate oval body shape (Fig. 12a), the parallel sided penis guide in inner view (Fig. 12g) and ventrite 1 with coarse punctures at middle (Fig. 12d). Description. TL: 1.42–1.66 mm, TW: 1.06–1.29 mm, TH: 0.73–0.91 mm, TL/TW: 1.28–1.34, EL/EW: 1–1.03, PL/PW: 0.47–0.49, HW/PW: 0.66–0.70, PW/EW: 0.66–0.67. Body slightly oval, moderately convex, dorsum with white pubescence (Figs 13a–c). Head, antennae and mouthparts yellowish brown (Figs 1a, 13c), tip of mandibles dark brown. Pronotum and scutellar shield yellowish brown. Elytra black with narrowly apical margins yellowish brown (Figs 13a–b). Prothoracic hypomeron and prosternum yellowish brown. Mesoventrite and elytral epipleurae blackish brown. Metaventrite black. Legs yellowish brown. Head with fine frontal punctures, slightly larger than eye facets, 0.5–1.0 diameters apart. Eye densely faceted, interocular distance about 0.29 times of head width (Figs 1a, 13c). Pronotal punctures slightly larger than those on frons, 0.5–1.5 diameters apart. Surface of elytra with punctures much larger than those on pronotum, separated by 1.0–2.0 diameters. Abdominal postcoxal lines complete and moderately recurved, reaching 2/3 length of ventrite 1 (Fig. 13d), area enclosed by the lines finely and sparsely punctate, irregularly distributed, broadly smooth along the lines; ventrite 1 with fine and sparse punctures at middle, irregularly distributed. Male genitalia. Penis short and slender, slightly broadened at base, apex pointed (Fig. 13e); tegmen with penis guide in lateral view widest at base, gradually tapering to apex (Fig. 13f), in inner view subtriangular and stout (Fig. 13g), about 1/2 length of parameres; parameres stout and elongate oval with few setae at apex in lateral view (Fig. 13f). Type material. Holotype: male, No. SCAU (E)17041, CHINA: Guangxi: Daqingshan Mountains, Pingxiang, 2. VIII. 2005, Wang XM leg (SCAU). Paratypes: Guangxi: 1♀, with same data as holotype. 1♂ 1♀, Tongling Canyon, Huatong, 5. VIII. 2005, Wang XM leg. 1♂ 3♀, Pingxiang, Collecter unknown. Distribution. China (Guangxi). Etymology. The specific epithet is given after Pingxiang City, the type locality of this species.Published as part of Peng, Feng, Xie, Xiufeng, Peng, Zhengqiang, Wang, Xingmin & Chen, Xiaoshen, 2022, A taxonomic review of the genus Axinoscymnus Kamiya, with descriptions of three new species (Coleoptera, Coccinellidae), pp. 431-453 in Zootaxa 5154 (4) on pages 451-452, DOI: 10.11646/zootaxa.5154.4.2, http://zenodo.org/record/665115
Morphological and molecular evidence for the recognition of Caloglossa fonticola sp. nov. (Delesseriaceae, Rhodophyta) from an underground spring in Guangxi, China
No full textFang, Kun-Peng, Nan, Fang-Ru, Feng, Jia, Liu, Qi, Liu, Xu-Dong, Xie, Shu-Lian (2021): Morphological and molecular evidence for the recognition of Caloglossa fonticola sp. nov. (Delesseriaceae, Rhodophyta) from an underground spring in Guangxi, China. Phytotaxa 522 (1): 15-26, DOI: 10.11646/phytotaxa.522.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.522.1.
sj-pdf-1-jcm-10.1177_00219983211041755 - Supplemental material for Parametric sensitivity research of interference-fit bolted single-lap laminates joint based on an improved analytical stiffness model
No full textSupplemental material, sj-pdf-1-jcm-10.1177_00219983211041755 for Parametric sensitivity research of interference-fit bolted single-lap laminates joint based on an improved analytical stiffness model by Yuan Yang, Peng Zou, Xilin Dai, Bo Yang and Feng Gao in Journal of Composite Materials</p
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