264,574 research outputs found
Heat transfer and fluid flow in a water-filled glass louver subject to solar irradiation
No full textNumerical studies of fluid flow and heat transfer in a water-filled prismatic glass louver have been carried out to investigate the efficiency of solar thermal energy harvest via the proposed louver that could be deployed in buildings to improve natural lighting to save electrical bills as well as to harvest and store solar energy into thermal energy. One surface of the prismatic louver is adjusted to face the direct solar irradiation. Both direct and diffuse irradiations are incorporated for different air mass models. The distribution of absorbed solar radiation in the louver is pre-calculated via the Monte Carlo method and input as the heating source. The finite element method based on COMSOL is adopted to simulate the three-dimensional steady-state fluid flow and conjugate heat transfer in the triangular water channel. Temperature-dependence of water property is considered. The prismatic louver is surrounded by ambient air. Emphasis is placed on investigating the effects of flow rate and solar irradiation conditions on water temperature rise and energy harvest. It is found that the outlet water temperature is a strong function of the water flow rate. Most of the absorbed solar energy in the glass can be converted into stored thermal energy in the water through convective heat transfer. The water pumping power consumed is negligible as compared to the energy harvested. When the louver is adjusted to face the direct solar irradiation and the water flow velocity is 0.1 m/s, the overall utilization efficiency of the louver reaches 89.2, 90.3, 89.1, and 87.9% for AM1.0, 1.5, 2.0, and 3.0, respectively.Peer reviewe
Lebertia (Lebertia) abseta Guo, Jin & Asadi 2006
No full text3.4 <i>Lebertia</i> (<i>Lebertia</i>) <i>abseta</i> Guo, Jin <i>&</i> Asadi, 2006 <p> <i>Lebertia</i> (<i>Pseudolebertia</i>) <i>abseta</i> Guo, Jin & Asadi, 2006: 346; Guo & Xu, 2013: 190.</p> <p>Material examined. 3 females, 1 male, Pangquangou Nature Reserve, Jiaocheng County, Shanxi, China (37°30′N, 111°39′E; elev. 1 500 m), 15 August 2002, coll. Jianjun Guo; 6 females, 2 males, Mt. Luya National Nature Reserve, Shanxi, China (37°43′N, 111°51′E; elev. 1 350 m), 17 August 2002, coll. Jianjun Guo; 2 females, Mt. Cangyan, Jingxing County, Hebei, China (38°02′N, 114°08′E; elev. 900 m), 19 August 2002, coll. Jianjun Guo; 3 females, 2 males, Taibaishan National Nature Reserve, Taibai County, Shaanxi, China (37°07′N, 107°53′E; elev. 2 150 m), 9 July 2009, coll. Chengshuai Xu.</p> <p> Remarks. The species was erected by Guo, Jin <i>&</i> Asadi (2006) based on specimens from Iran, and redescribed by Guo <i>&</i> Xu (2013) based on specimens from China. In this paper, the authors agree with the system which proposed by Gerecke (2009) that the subgenus <i>Pseudolebertia</i> should be considered the synonym of the subgenus <i>Lebertia</i>. So that, the species <i>L.</i> (<i>Pseudolebertia</i>) <i>abseta</i> should be <i>L.</i> (<i>Lebertia</i>) <i>abseta</i>.</p> <p>Distribution. Palaearctic Region (Iran (Kerman); China (Shanxi, Shannxi, Hebei)).</p> <p> <b>Founding</b> This research was supported by the National Natural Science Foundation of China (31372161, 31201744), the Program of Science and Technology Innovation Talents Team, Guizhou Province (20144001), the Innovation Team Program for Systematic and Applied Acarology ([2014]33), and the Provincial Outstanding Graduate Program for Agricultural Entomology and Pest Control ([2013]010).</p> <p> <b>Acknowledgement</b> Special thanks to Prof. Shangwei Li (Institute of Entomology, Guizhou University, P. R. China) and Chengshuai Xu (Huantai No. 1 Middle School, Shandong Province, P. R. China) for providing references and advice to the authors.</p>Published as part of <i>Wang, Jialin, Jin, Daochao, Yi, Tianci & Guo, Jianjun, 2016, Water mites of subgenus Lebertia (Lebertia) Neuman from China (Hydrachnidia: Lebertiidae), pp. 54-63 in Zoological Systematics 41 (1)</i> on page 62, DOI: 10.11865/zs.201603, <a href="http://zenodo.org/record/5367272">http://zenodo.org/record/5367272</a>
Podocinum tibetensis Yan, Jin, Wu, Guo & Guo 2012
No full text36. Podocinum tibetensis Yan, Jin, Wu, Guo & Guo, 2012 Podocinum tibetensis Yan, Jin, Wu, Guo & Guo, 2012: 36. Type depository. Institute of Entomology, Guizhou University, Guiyang, China. Type locality and habitat. China, Bome County (29°53’ N, 95°40’ E; alt. 2726 m), Nyingchi, Tibet Autonomous Region, 25 August 2010, in litter under pine tree.Published as part of Barros, Avyla R. A., Castilho, Raphael C. & De Moraes, Gilberto J., 2020, Catalogue of the mite family Podocinidae Berlese (Acari: Mesostigmata), pp. 141-156 in Zootaxa 4802 (1) on page 153, DOI: 10.11646/zootaxa.4802.1.9, http://zenodo.org/record/390496
Kinematic Simulation and Structure Analysis of a Morphing Flap
No full textThis thesis presents a study on the design and analysis of a morphing flap
structure integrated with actuation mechanism for potential application to large
aircraft. Unlike the conventional rigid flap mounted on the wing trailing edge,
the morphing flap is designed as a unitized structural system integrated with
three primary components: the upper and lower flexible skins reinforced by
stringers, an eccentric beam actuation mechanism (EBAM) with discs fixed on it,
and the connection of the discs with the stringers. Based on the EBAM concept
proposed by Dr Guo in previous research [1], the current study has been
focused on the EBAM design and optimization, kinematic simulation and
structural modelling of the morphing flap.
Although a lot of efforts have been made to develop the morphing flap in
previous research, it is lack of detailed design of the disc-skin linkage and clear
view on the mechanism optimization in relation to the shape requirement. The
main objective of this research is to meet the morphing shape requirements and
calculate the actuation torque for a specified morphing flap. Firstly effort was
made to design and optimize the disc shape and locations in the EBAM for the
best matching of the specified morphing shape with minimum actuation torque
demand. It is found that minimum three discs are required and their locations
have little effect on the actuation torque. Secondly attention was focused on
designs of the disc and a C-linkage with the stringers. To ensure that the C-
linkage works in practice, a twisted stringer flange design was proposed. Thirdly
the actuation mechanism was integrated with the stiffened skin to play the role
of an active rib in the flap structure. Based on the design, FE modelling and
analysis of the morphing flap structure was carried out. The behaviour of the
morphing flap under the internal actuation and external aerodynamic load was
applied for stress analysis and detailed design of the structures. Finally the
kinematics of the integrated morphing flap was simulated by using CATIA to
demonstrate the feasibility and the effectiveness of the improved design
Tuber mongolicum T. Bau & F. Guo 2023, sp.nov.
No full textTuber mongolicum T. Bau & F. Guo sp.nov. (Figure 2–5) MycoBank number:—846829 Diagnosis:— Tuber mongolicum differs from related species by its pseudoparenchymatous peridum, ellipsoid ascospores and 1–5 spored asci. Etymology:—‘mongolicum’ refers to its occurrence in Inner Mongolia Autonomous Region, China. Types:— CHINA, Inner Mongolia Autonomous Region, Tongliao Daqinggou National Nature Reserve, in soil under Populus sp., 42°47′N, 122°10′E, 214 m, 23 Aug. 2022, Fang Guo, Tolgor Bau, HMJAU65125 (holotypus!). Same location; Fang Guo, Tolgor Bau HMJAU65126 (paratypus!). Description:—Ascomata are spherical to irregular spherical, 0.8–1.5 cm in diameter, with depressions. The surface is yellowish-green (30B7), olive-brown (4D7) to yellowish brown (5D8) when fresh, with small protrusions at the concave part of the fruiting body. Gleba is yellow-brown with white veins that have a sparse radial distribution from the base, and starch-like aroma (Figs 2–3). Peridum is 349–506 µm, thick, with two layers: the outer layer is yellow-brown, and 71–174 μm thick, the inner layer is a clear shade, 205–418 μm thick, and composed of sub-globose pseudoparenchymatous cells of 15–33 × 9–20 µm wide (Figs 4a, 5c). Asci are usually 1–4-spored, but occasionally 5-spored. Asci are sub-globose to ellipsoid, thin-walled, and short or nearly sessile, measuring 56–91 × 46–68 µm (Figs. 4 b-c. 5b). Ascospores are oblong-ellipsoid, ellipsoid to broadly ellipsoid, yellow-brown at maturity, and reticulate. In 1-spored asci 38–50 × 30–40 µm, Q=1.1–1.28, in 2- spored asci 33–44 × 25–37 µm, Q=1.1–1.4, in 3-spored asci 28–40 × 22–28 µm, Q=1.15–1.43, in 4-spored asci 25–35 × 20–29 µm, Q=1.15–1.37, in 5-spored asci 26–31 × 22–25 µm, Q=1.1–1.24, spike ornamentation 2.92–5.06 µm length, and mostly 3–6 meshes across the spore width (Figs 4 b-c, 5b). Habitat: Hypogeous, in soil under Populus sp.; ascoma occurring in autumn. Distribution: Only within Inner Mongolia Autonomous Region, Northern China.Published as part of Guo, Fang & Bau, Tolgor, 2023, A new species of Tuber (Tuberaceae, Pezizales) from Inner Mongolia, China, pp. 39-48 in Phytotaxa 592 (1) on pages 43-45, DOI: 10.11646/phytotaxa.592.1.3, http://zenodo.org/record/783562
Protiaropsis pedunculata Xu, Huang & Guo, sp. nov.
No full textProtiaropsis pedunculata Xu, Huang & Guo, sp. nov. (Figs 8, 11– 12) Material examined. Holotype (TIO 015), East China Sea, station DF083 (27 ° 37 ’N, 123 ° 41 ’E), depth 103 m, 24 July 2009, coll. Donghui Guo. Diagnosis. Umbrella bell-shaped with scattered nematocyst clusters on exumbrella; manubrium on short and broad gastric peduncle; with 4 large, interradial gonads, no transverse folds. Description. Umbrella bell-shaped, 1.0 mm in height, 0.8 mm in width, with rounded summit without marked apical process, jelly uniformly thick, with scattered cnidocysts on exumbrella; manubrium cylindrical, mounted upon the distal end of the short and broad gastric peduncle, about 1 / 2 length of bell cavity; with wide quadratic mouth and slightly flared lips; with 4 large gonads, one covering each interradial wall of manubrium, no transverse folds; with 4 simple radial canals and circular canal; no centripetal canals; 4 perradial and 4 interradial hollow primary marginal tentacles, without base swelling, but their basal part adnate to exumbrella, sunk into a narrow fissure between two marginal lobes, each tentacle with a terminal knob; no secondary tentacles; without ocelli; velum narrow. Distribution. East China Sea. Etymology. The specific name is from the Latin pedunculata, meaning peduncle, referring to the manubrium with gastric peduncle. Remarks. The new species can be easily distinguished from the other species of Protiaropsis by: 1) manubrium mounted upon the distal end of the short and broad gastric peduncle; 2) exumbrella with scattered cnidocyst clusters; 3) with 4 large gonads, covering each interradial wall of manubrium, no transverse folds (see the key of Protiaropsis).Published as part of Zhenzu Xu, Jiaqi Huang, Mao Lin, Donghui Guo & Chunguang Wang, 2016, Taxonomic notes on Hydroidomedusae (Cnidaria) from South China Sea II: Family Bythotiaridae (Anthomedusae), pp. 149-157 in Zoological Systematics 41 (2) on pages 153-154, DOI: 10.11865/zs.2016013, http://zenodo.org/record/27028
Interphasma leigongshanense Xu, Yang et Guo 2010
No full textInterphasma leigongshanense Xu, Yang et Guo, 2010 Type locality: China (Leigongshan, Guizhou). NOTE. No material examined.Published as part of Li, B. L., Shi, F. M. & Wang, H. J., 2021, Stick insects of the genus Interphasma Chen et He, 2008 (Phasmida: Phasmatidae) from China, pp. 24-32 in Far Eastern Entomologist 422 on page 30, DOI: 10.25221/fee.422.3, http://zenodo.org/record/716634
Ixodes kandingensis Guo, Sun, Xu and Durden 2017
No full text112. Ixodes kandingensis Guo, Sun, Xu and Durden, 2017. A Palearctic species known only to parasitize Carnivora: Mustelidae. M: unknown F: Guo et al. (2017) N: Guo et al. (2017) L: unknown Redescriptions: nonePublished as part of Guglielmone, Alberto A., Petney, Trevor N. & Robbins, Richard G., 2020, Ixodidae (Acari: Ixodoidea): descriptions and redescriptions of all known species from 1758 to December 31, 2019, pp. 1-322 in Zootaxa 4871 (1) on page 37, DOI: 10.11646/zootaxa.4871.1.1, http://zenodo.org/record/442334
Processing of figure and background motion in the visual system of the fly
No full textReichardt W, Egelhaaf M, Guo A-K. Processing of figure and background motion in the visual system of the fly. Biological Cybernetics. 1989;61(5):327-345
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
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