80,003 research outputs found
mechanization of lily microbulb
No full textmechanization of lily microbulb multiplication operations. ta-te lin & ching-lu hsieh. department of agricultural machinery engineering.. national taiwan university.. taipei. taiwan. roc. mechanization of lily microbul
Guineapona Lu & Zhang 2023, gen. nov.
No full textGuineapona gen. nov. Type species: Guineapona monolophos sp. nov., here designated.Published as part of Lu, Lin & Zhang, Yalin, 2023, New genera and species of Paraboloponina (Hemiptera: Cicadellidae: Drabescini) from Indonesia, pp. 588-594 in Zootaxa 5244 (6) on page 589, DOI: 10.11646/zootaxa.5244.6.4, http://zenodo.org/record/767310
Canopyana apicospina Lu & Zhang 2023, sp. nov.
No full textCanopyana apicospina sp. nov. (Figs. 2A–W)Published as part of Lu, Lin & Zhang, Yalin, 2023, New genera and species of Paraboloponina (Hemiptera: Cicadellidae: Drabescini) from Indonesia, pp. 588-594 in Zootaxa 5244 (6) on page 591, DOI: 10.11646/zootaxa.5244.6.4, http://zenodo.org/record/767310
Bombus (Pyrobombus) taiwanensis Williams, Sung, Lin and Lu 2022, sp. nov.
No full textBombus (Pyrobombus) taiwanensis Williams, Sung, Lin and Lu sp. nov. (Figures 1, 2) urn:lsid:zoobank.org:act: 726E8A64-28A2-4DD9-8801-651DED8BD495 [Bombus sp. non descripta Chiu 1948: 71, 1♀ (worker) (TARI)] [Bombus (Pyrobombus) nr. hypnorum Starr, 1992: 149, 3♀ (workers) 2♂ (TARI)] +Inference of being conspecific supported by published (Huang et al. 2015; Williams et al. 2020) or ++unpublished (Thanoosing, in prep.) GMYC- or PTP-coalescent analyses for COI barcodes. *Inference of being separate species supported by PTP-coalescent analyses for COI barcodes (Williams et al. 2020) or **by morphology (Williams et al. 2009). Bombus (Megabombus) trifasciatus Smith, 1852 Bombus wilemani Cockerell, 1911 Bombus (Megabombus) bicoloratus Smith, 1879 Bombus (Psithyrus) turneri (Richards, 1929 [Psithyrus]) Psithyrus monozonus (Friese, 1931) not of Friese 1909 [= B. lucorum (Linnaeus)] Bombus (Pyrobombus) taiwanensis sp. nov. * Bombus (Pyrobombus) flavescens Smith, 1852 Bombus (Pyrobombus) sonani (Frison, 1934 [Bremus])* Bombus (Alpigenobombus) angustus Chiu, 1948 * [Bombus (Bombus) terrestris (Linnaeus, 1758) – introduced from Europe only in glass houses] Bombus (Melanobombus) eximius Smith, 1852 Bombus latissimus Friese, 1910 Bombus (Melanobombus) formosellus (Frison, 1934 [Bremus])* Material examined. Holotype: 1♀ (queen), labels (1): white, printed in black ‘ Mt. Hehuan, South peak/(3100 m), Nantou Co.,/ Taiwan, VI-15-2019,/ I. H. Sung’; (2) white, printed in black ‘ Bombus taiwanensis /Williams, Sung, Lin & Lu sp. nov./det. Paul H. Williams’; (3) red, printed in black ‘ HOLOTYPE / ♀ / Bombus taiwanensis /Williams, Sung, Lin & Lu’; (4) white, printed in black ‘[barcode]/00214314’ (TFRI). Paratypes: 1♀ (worker), labels: (1) white, printed in black ‘Mt. Hehuan, South peak/ (3100 m), Nantou Co,/ Taiwan, VI-15-2019,/I. H. Sung’; (2) white, printed in black ‘ Bombus taiwanensis /Williams, Sung, Lin & Lu sp. nov./det. Paul H. Williams’; (3) red, printed in black ‘ PARATYPE / ♀ / Bombus taiwanensis / Williams, Sung, Lin & Lu’; (4) white, printed in black ‘[barcode]/00214315’ (TFRI). 1♀ (worker), labels (1): white, printed in black ‘ Mt. Hehuan, South peak/(3100 m), Nantou Co.,/ Taiwan, VI-15-2019 /I. H. Sung’; (2) white, printed in black ‘ Bombus taiwanensis /Williams, Sung, Lin & Lu sp. nov./det. Paul H. Williams’; (3) red, printed in black ‘ PARATYPE / ♀ / Bombus taiwanensis / Williams, Sung, Lin & Lu’; (4) white, printed in black ‘[barcode]/00214316’ (TFRI). 1♀ (worker), labels (1): white, printed in black ‘Mt. Hehuan, South peak/(3100 m), NantouCo.,/ Taiwan, VI-15-2019,/I. H. Sung’; (2) white, printed in black ‘ Bombus taiwanensis / Williams, Sung, Lin & Lu sp. nov./det. Paul H. Williams’; (3) red, printed in black ‘ PARATYPE / ♀ / Bombus taiwanensis / Williams, Sung, Lin & Lu’; (4) white, printed in black ‘[barcode]/00214317’ (TFRI). 1♀ (worker), labels (1): white, printed in black ‘ Mt. Hehuan, South peak/(3100 m), Nantou Co.,/ Taiwan, VI-15- 2019,/I. H. Sung’; (2) white, printed in black ‘ Bombus taiwanensis /Williams, Sung, Lin & Lu sp. nov./det. Paul H. Williams’; (3) red, printed in black ‘ PARATYPE / ♀ / Bombus taiwanensis / Williams, Sung, Lin & Lu’; (4) white, printed in black ‘[barcode]/00214318’ (TFRI). Compared material. 1♀ (worker), labels: (1) orange, printed in black ‘C. TAIWAN: Tsuifeng/ 2300 m. Nantou Hsien / 23‒25.VI.1983 /K.S. Lin & S.C. Lin’; (2) white, handwritten ‘nr. ardens ’; (3) white, handwritten ‘[worker] Bombus /(Pyrobombus)/ hypnorum /(Linnaeus)/ det. P.H. Williams /1991’; (4) green, printed in black ‘BOLD# (BEE-BOL /BBW/ PHW)/ 1550A06-TWN’; (5) white, printed in black ‘[worker] Bombus /(Pyrobombus)/ taiwanensis / det. P.H. Williams /2021’ (PHW). 1♂, labels: (1) orange, printed in black ‘C. TAIWAN: Tayuling/ 2560 m. Hualien Hsien / 9‒16.VI.1980 /K.S. Lin & B.H. Chen’; (2) white, handwritten ‘ ♂ Bombus /(Pyrobombus)/ hypnorum /(Linnaeus)/det. P.H. Williams /1991’; (3) green, printed in black ‘BOLD# (BEE-BOL /BBW/ PHW)/1550A07-TWN’; (4) white, printed in black ‘ ♂ Bombus /(Pyrobombus)/ taiwanensis /det. P.H. Williams /2021’ (PHW). Etymology Named for its occurrence in Taiwan, avoiding homonymy with earlier names in Bombus of formosanus, formosellus, formosulus and formosus. Diagnosis A predominantly black, orange-tailed bumblebee from Taiwan (Figure 1). Within the hypnorum complex distinguished by (Figure 1): female and male with the front, middle and hind leg basitarsi all with the integument lighter brown than the tibiae (vs darker like the rest of the body for B. hypnorum); hair (pubescence) of the metasoma with all of terga 4‒6 a pale but dull sandy brown or very pale orange (vs white for B. hypnorum). Female clypeus in the half nearest to the labrum smooth and shining with only a few large punctures, mostly spaced by much more than their own widths (Figure 2) (vs large punctures often separated by only their own widths for B. hypnorum). Male genitalia with the gonostylus inner anterior (basal) projection separated from the gonocoxa by less than the breadth of the recurved hook of the penis-valve head (vs separated by much more than the breadth of the recurved hook of the penis-valve head for B. hypnorum). Description Female habitus illustrated in Figure 1, body size small (worker body length 10‒12 mm), hair (pubescence) moderately long, wings nearly clear. Mandible with the distal notch anterior to the posterior tooth (incisura) very shallow and hardly marked. Oculo-malar area (‘cheek’ sensu Williams et al. 2014; not the gena) of medium length, 1.0× longer (length measured between the ventral edge of the compound eye and the edge of the malar area at the articulation of the mandible midway between the mandibular condyles) than the breadth of the mandible at its base (breadth between and including the mandibular condyles). Clypeus weakly swollen (Figure 2), its raised area nearly flat, the central area with few widely scattered large and medium punctures, few punctures especially medially and ventrally adjacent to the labrum. The area between the inner edge of the compound eye and the outer edge of the lateral ocellus occupied in just over its outer third by a broad band with a few mostly large punctures, spaced by more than their own widths, the smaller punctures between the larger punctures very few. Mid basitarsus with the distal posterior corner broadly rounded; hind tibia outer surface with a corbicula, the surface sculpturing weakly reticulate so that the surface appears slightly matt; hind basitarsus in the distal three-quarters covered with short branched decumbent and weakly overlapping hairs with golden reflections; tergum 6 posteriorly rounded and not divided medially, with a small subapical dorsal boss. Colour pattern of the hair of the body predominantly brownish black. Head entirely black except for orange hairs anteriorly on the labrum and laterally on the mandibles. Thoracic dorsum anterior to the wing bases with paler but dark sandy brown hair intermixed, this paler hair extending down the side of the thorax anteriorly, and on the scutellum posteriorly; the front, middle and hind leg tibiae all with some hairs orange, the basitarsi all with the integument lighter brown than the tibiae and with more orange hairs. Hair of the metasoma with tergum 3 posteriorly and all of terga 4‒6 a pale but dull sandy brown or very pale orange. Male body size small (body length 12 mm), hair (pubescence) moderately long, wings nearly clear. Colour pattern of the hair of the body predominantly dark brownish, almost black. Head and the thoracic dorsum anterior to the wing bases with paler but dull sandy brown hair intermixed, this pale hair covering the side of the thorax (mesepisternum), and on most of the scutellum; the front, middle and hind leg tibiae all with the long hairs orange, the basitarsi all with the integument lighter brown than the tibiae and with the long hairs orange. Hair of the metasoma with tergum 1 and all of terga 4‒7 a pale but dull sandy-brown or very pale orange. Male genitalia with the gonostylus nearly triangular, the inner anterior (basal) projection separated from the gonocoxa by less than the breadth of the recurved hook of the penis-valve head; the volsella scarcely projecting beyond the gonostylus; the penis valve with the head recurved as a flattened sickle-shaped hook that is not strongly tapered. Distribution Endemic to the mountains of Hsinchu, Nantou and Hualien counties, central Taiwan, at elevations of 2300‒3100 m.Published as part of Williams, Paul H., Sung, I-Hsin, Lin, Yi-Jing & Lu, Sheng-Shan, 2022, Discovering endemic species among the bumblebees of Taiwan (Apidae, genus Bombus), pp. 435-447 in Journal of Natural History 56 (5 - 8) on pages 438-442, DOI: 10.1080/00222933.2022.2052991, http://zenodo.org/record/680972
On the size of outerplanar graphs with positive Lin-Lu-Yau Ricci curvature
No full textIn this paper, extending a result of Brooks et.al. [arXiv:2403.04110], we show that if an outerplanar graph with minimum degree at least has positive Lin-Lu-Yau curvature on every vertex pair, then has at most vertices, and this upper bound is sharp.17 page
A First- and Second-Order Motion Energy Analysis of Peripheral Motion Illusions Leads to Further Evidence of “Feature Blur” in Peripheral Vision
No full textAnatomical and physiological differences between the central and peripheral visual systems are well documented. Recent findings have suggested that vision in the periphery is not just a scaled version of foveal vision, but rather is relatively poor at representing spatial and temporal phase and other visual features. Shapiro, Lu, Huang, Knight, and Ennis (2010) have recently examined a motion stimulus (the “curveball illusion”) in which the shift from foveal to peripheral viewing results in a dramatic spatial/temporal discontinuity. Here, we apply a similar analysis to a range of other spatial/temporal configurations that create perceptual conflict between foveal and peripheral vision.To elucidate how the differences between foveal and peripheral vision affect super-threshold vision, we created a series of complex visual displays that contain opposing sources of motion information. The displays (referred to as the peripheral escalator illusion, peripheral acceleration and deceleration illusions, rotating reversals illusion, and disappearing squares illusion) create dramatically different perceptions when viewed foveally versus peripherally. We compute the first-order and second-order directional motion energy available in the displays using a three-dimensional Fourier analysis in the (x, y, t) space. The peripheral escalator, acceleration and deceleration illusions and rotating reversals illusion all show a similar trend: in the fovea, the first-order motion energy and second-order motion energy can be perceptually separated from each other; in the periphery, the perception seems to correspond to a combination of the multiple sources of motion information. The disappearing squares illusion shows that the ability to assemble the features of Kanisza squares becomes slower in the periphery.The results lead us to hypothesize “feature blur” in the periphery (i.e., the peripheral visual system combines features that the foveal visual system can separate). Feature blur is of general importance because humans are frequently bringing the information in the periphery to the fovea and vice versa
Ksavers Andermanis – LU Akadēmiskās nozīmītes meta autors
No full textRaksts tapis kā turpinājums 2024. gada septembra mēneša priekšmetam par Latvijas Universitātes (LU) Akadēmisko nozīmīti, kur uzmanība pievērsta LU Akadēmiskās nozīmītes meta autoram, LU Arhitektūras fakultātes studentam un novadpētniekam, vācbaltietim Ksaveram Andermanim. K. Andermanis ne tikai ir sniedzis ieguldījumu Latvijas etnogrāfijas pētniecībā, bet arī LU simbolu izgatavošanā, kas mūsdienās saglabā savu unikalitāti un vērtību. Meta autora piederība pie LU saimes sakņojusies jau viņa ģimenē, jo viņa tēvs ir absolvējis Rīgas Politehnisko institūtu, LU priekšteci starpkaru periodā, un strādājis LU Saimniecības padomē par inspektoru.The article is a continuation of the September 2024 Museum Object on the Academic Badge of the University of Latvia (UL), which focuses on the author of the UL Academic Badge design, the student of the Faculty of Architecture and local historian, the Baltic German Ksavers Andermanis. K. Andermanis has not only contributed to the research of Latvian ethnography, but also to the production of symbols of the UL, which today retain their uniqueness and value. The author's belonging to the UL family is rooted in his family, as his father graduated from the Riga Polytechnic Institute, the predecessor of UL during the interwar period, and worked as an inspector at the UL Economical council
Papuakutara Lu & Webb & Zhang 2018, gen. nov.
No full textPapuakutara gen. nov. Papuakutara ficus sp. nov. Papuakutara lucidicosta (Walker) comb. nov.; Walker, 1870: 323, Iassus, NG; Zhang & Webb, 1996: 16, fig. 495, Kutara. Lectotype ♀, New Guinea, designated by Zhang & Webb, 1996. Papuakutara robustipenis sp. nov.Published as part of Lu, Lin, Webb, M. D. & Zhang, Yalin, 2018, A new leafhopper genus of subtribe Paraboloponina (Hemiptera: Cicadellidae: Deltocephalinae: Drabescini), with description of two new species from Papua New Guinea, pp. 281-286 in Zootaxa 4521 (2) on page 282, DOI: 10.11646/zootaxa.4521.2.9, http://zenodo.org/record/260989
Graphs with Lin-Lu-Yau curvature at least one and regular bone-idle graphs
No full textWe study the Ollivier-Ricci curvature and its modification introduced by Lin, Lu, and Yau on graphs. We provide a complete characterization of all graphs with Lin-Lu-Yau curvature at least one. We then explore the relationship between the Lin-Lu-Yau curvature and the Ollivier-Ricci curvature with vanishing idleness on regular graphs. An exact formula for the difference between these two curvature notions is established, along with an equality condition. This condition allows us to characterize edges that are bone-idle in regular graphs. Furthermore, we demonstrate the non-existence of 3-regular bone-idle graphs and present a complete characterization of all 4-regular bone-idle graphs. We also show that there exist no 5-regular bone-idle graphs that are symmetric or a Cartesian product of a 3-regular and a 2-regular graph.23 pages, 5 figures. arXiv admin note: substantial text overlap with arXiv:2407.0885
Outerplanar graphs with positive Lin–Lu–Yau curvature
No full textIn this paper, we show that all simple outerplanar graphs G with minimum degree at least 2 and positive Lin–Lu–Yau Ricci curvature on every edge have maximum degree at most 9. Furthermore, if G is maximally outerplanar, then G has at most 10 vertices. Both upper bounds are sharp.</p
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