6,157 research outputs found
Delineating Grassland in British Columbia using Object-Based Image Analysis (GEOBIA) through Google Earth Engine
No full textGrasslands in British Columbia (BC) play a pivotal role in biodiversity, supporting over 30% of the region's endangered species. However, rapid urbanization and forest encroachment threaten these habitats. This study addresses the urgent need for an accurate, automated method for delineating and monitoring BC's grasslands by employing Object-Based Image Analysis (GEOBIA) within the Google Earth Engine platform, utilizing high-resolution Sentinel-2 satellite imagery. The approach innovates by integrating Superpixel Segmentation Based on Simple Non-Iterative Clustering (SNIC) with Random Forest classification, aimed at overcoming the mixed pixel effect prevalent in pixel-based methods. The methodology demonstrates a significant improvement in the accuracy of grassland delineation, achieving an overall classification accuracy of 96%. Specifically, the accuracy for grassland identification increased by 26.6% compared to the previous study, underscoring the effectiveness of GEOBIA for environmental monitoring. This advancement offers a promising tool for the conservation and management of grassland ecosystems in BC, suggesting a scalable model for similar ecological studies worldwide. The findings advocate for the adoption of GEOBIA in remote sensing practices, potentially transforming how grasslands are monitored and conserved, thereby contributing to the preservation of biodiversity
First person – Xuan Xie
No full textABSTRACT
First Person is a series of interviews with the first authors of a selection of papers published in Journal of Cell Science, helping early-career researchers promote themselves alongside their papers. Xuan Xie is the first author on ‘Deubiquitylases USP5 and USP13 are recruited to and regulate heat-induced stress granules through their deubiquitylating activities’, published in Journal of Cell Science. Xuan is a PhD student in the lab of Masayuki Komada at the Tokyo Institute of Technology, Yokohama, Japan, investigating the roles of ubiquitylation and deubiquitylation in the regulation of stress granules.</jats:p
Chao leng xuan liang hun he wu zhong de yi he jian xiang gan zi xuan dong li xue
No full textLi, Xiaoke = 超冷旋量混合物中的異核間相干自旋動力學 / 李小科.Thesis Ph.D. Chinese University of Hong Kong 2015.Includes bibliographical references (leaves 126-142).Abstracts also in Chinese.Title from PDF title page (viewed on 25, October, 2016).Li, Xiaoke = Chao leng xuan liang hun he wu zhong de yi he jian xiang gan zi xuan dong li xue / Li Xiaoke
The Dunhuang Manuscript Version of a Synopsis of the Yu zhu jinggang bore jing xuan yan and Its Author
No full text110009359848The present paper investigates a synoptic text, surviving only in Dunhuang manuscript fragments (Stein Nos 8044, 8166, and 9723 衾all part of the same scroll), dealing with the Yu zhu jingang bore jing xuan yan御註金剛般若經宣演, the work of Daoyin 道氤(668-740), a scholar-monk active during the Kaiyuan開元era.My examination of the content and form of the extant fragments leads me to conclude that this must be a synopsis compiled on the basis of the Jingang ying, a commentary to the Yu zhu jingang bore jing xuan yan. We know from Yitianʼs 義天Xin bian zhu zong jiao zang zong lu 新編諸宗教藏總録that a synoptic text called Yu zhu jingang bore jing xuan yan ke 御註金剛般若經宣演科, in two scrolls, was composed by Quanming 詮明, a scholar-monk who lived under the Liao 遼Dynasty. The text, however, has not been indentified so far. My investigation raises the possibility that the author of the above Dunhuang manuscript fragments might be no other than Quanming. These materials thus become very important sources not only for our understanding of the influence exerted by the Yu zhu jingang bore jing xuan yan ke and the Jingang ying on later Chinese Buddhism but also for the study of Quanmingʼs work and thought.departmental bulletin pape
Shi si han wei ma ma, da dao jia pai! Jian jue yong hu ba ba, pi xiu yi pai!
No full text毛泽東思想宣传隊春雷红衛兵宣."一九六六年十二月一日""得奖漫画, 原作保存, 春雷红卫兵总部, 1966.12.30"--背面.题名及丛书由编目者拟定.Mao Zedong si xiang xuan chuan dui chun lei hong wei bing xuan."Yi jiu liu liu nian shi er yue yi ri""De jiang man hua, yuan zuo bao cun, Chun lei hong wei bing zong bu, 1966.12.30"--Bei mian.Ti ming ji cong shu you bian mu zhe ni ding
Arsenic behavior during the treatment of refractory gold ores via POX: Characterization of Fe-AsO4-SO4 precipitates
No full textArsenic is a common contaminant in refractory gold ores/concentrates and its accepted that total pressure oxidation (POX) is the most appropriate technology to treat these due to their refractoriness and ability to stabilize arsenic via ferric arsenate compounds (Fe-As). However, information gaps about the behavior and stability of the various Fe-As' s formed at high temperatures in downstream gold processing steps remain and may have significant practical implications. This paper focuses on the precipitation behavior of arsenic during autoclaving of various arsenopyrite containing ore concentrates from around the world. The first portion involved the precipitation of different synthetic precipitates at POX conditions found in the gold industry by varying Fe/As ratios in the feed solutions. Mineralogical characterization results showed that arsenate-containing basic ferric sulphate (As-BFS), basic ferric arsenate sulphate (BFAS), and ferric arsenate sub-hydrate (FAsH) formed. In the second portion, five pyrite/arsenopyrite concentrates received from gold mines around the world were submitted to batch POX and mineralogical analysis. We observed that the mechanism of precipitation for pyrite/arsenopyrite concentrates appears to be different vs. synthetic solutions. Upon processing of the gold concentrates under POX, the initial Fe/As ratio in the concentrates was retained to the final generated residues. The major Fe-As' s generated in the POX residues from the concentrates were As-BFS and BFAS, while non-As containing ferric phases included hematite and some small fraction of jarosite. Finally, we observed that as the Fe/As molar ratio in the concentrate feed increased, the amount of As-BFS decreased while that of BFAS increased
FIGURE 2 in Integrative taxonomy base on morphology and molecular phylogeny with description of a new genus, Progoniogryllus gen. nov. and two new species (Orthoptera: Grylloidea: Gryllidae; Gryllinae)
No full textFIGURE 2. The phylogenetic relationship among Gryllinae species, obtained by Maximum likelihood inference. Outgroups are Gryllotalpa sp_Moz, Gryllotalpa africana and Gryllotalpa sp_PNG. Abbreviations: Van (Vanuatu, Espiritu Santo), Moz (Mozambique Yemen, Socotra), PNG (PNG, Mt Wilhelm), NC (New Caledonia), India (India, Kerala).Published as part of Ma, Libin, Jing, Xuan & Zheng, Yanna, 2021, Integrative taxonomy base on morphology and molecular phylogeny with description of a new genus, Progoniogryllus gen. nov. and two new species (Orthoptera: Grylloidea: Gryllidae; Gryllinae), pp. 523-536 in Zootaxa 4995 (3) on page 525, DOI: 10.11646/zootaxa.4995.3.7, http://zenodo.org/record/505746
Progoniogryllus rotundus Ma & Jing & Zheng 2021, sp. nov.
No full text<i>Progoniogryllus rotundus</i> sp. nov. <p> <b>Type materials.</b> <b>Holotype. Male. China:</b> Xizang, Motuo, Beibeng, vi-1-2019, Ma, Libin coll. (SNNU). <b>Paratype. China:</b> 2 males, Xizang, Motuo, Beibeng, vi-1-2019, Ma, Libin coll. (SNNU); 1 male, Xizang, Chayu, Cibagou, vi-7-2019, Lv, Lin coll. (SNNU); 1 female, Xizang, Motuo, Beibeng, v-31-2019, Ma, Libin coll. (SNNU); 1 male, Yunnan, Lushui, Pianma, vi-20-2019, Ma, Libin coll. (SNNU); 1 female, Yunnan, Lushui, Pianma, vi-19-2019, Ma, Libin coll. (SNNU).</p> <p> <b>Measurements. Male (n=5):</b> BL 10.09±0.61, HL 1.76±0.09, HW 3.05±0.08, PL 2.06±0.08, PW 3.29±0.17, FWL 5.02±0.49, FWW 3.5±0.18, MTL 2.69±0.28, HFL 6.88±0.21; <b>female (n=5):</b> BL 10.84±0.59, HL 1.8±0.23, HW 3.14±0.39, PL 2.35±0.20, PW 3.33±0.25, MTL 2.33±0.36, HFL 7.50±0.25, OL 7.80±0.66</p> <p> <b>Description. Male.</b> Body size small for Gryllinae species (Fig. 5A). In frontal view, head higher dorsoventrally, vertex rounded and convex (Fig. 9D). Dorsally viewed, occiput short, round and convex; vertex inclined. Frons convex and narrow (almost equal to the width of antennal scape), and arched in lateral view. A shallow groove present between bottom of frons and top of clypeus (along with epistomal suture). Labrum shield-like with lateral margins acutely convex and apically pointed round. End section of maxillary palpus conspicuously longer than the third; end section of labial palpus obviously longer than the total length of anterior two. Pronotum long and obviously longer than head. In dorsal view, pronotum somewhat trapezoid-like, anteriorly narrower than the posterior. Anterior margin of pronotum slightly concave and posteriorly straight. Disc flatten and possessing with a middle groove, and laterally fold down. Lateral lobes depressed posteriorly. Elytra broad and flatten, conspicuously wider than hind margin of pronotum. Basal field somewhat wide but short and almost as half length of pronotum. Oblique veins two. Diagonal vein arched. Mirror transverse and obviously wider than length. Dividing vein separating hind part oval-like. Apical field distally rounded, very short and somewhat a half length of mirror, and possessing two rows of irregular cells. Hind wings absent. Cercus long and almost as long as hind tibia. Outer tympana large and long oval-like; inner tympana absent and corresponding part pit-like. Hind femur slightly longer than tibia. Subapical spurs five pairs and inner ones obviously shorter than the outer proximally.</p> <p>Body pubescent, brown and ornamented with yellowish-brown and dark-brown patterns. Lateral areas of head and pronotum possessing continuous yellowish-brown stripes (Fig. 9D). Lateral lobes of pronotum almost dark brown with bottom margin yellowish-brown. Maxillary palpus colored dark and labial palpus colored light. Elytral disc yellowish-brown and most of lateral lobes colored dark brown. Fore and middle legs yellowish-brown and ornamented with brown patterns, and on femur and tibia ornamented with dark brown spots dorsally and laterally, and, especially, dark brown spots almost forming a ring on middle tibia. Hind legs and cercus colored brown and ornamented with dull yellowish brown. Abdomen dark brown dorsally and laterally, and ventrally colored yellowish-brown and ornamented with brown spots. Subgenital plate colored brown.</p> <p>Epiphallus almost without median lobe and slightly extended outward at the middle (Fig. 6A–C). Lateral lobes of epiphallus short and obtuse, the gap between them broad and somewhat rectangular. In lateral view, included angle between median and lateral lobe nearly arched. Ectoparamere short and slightly upward curved. In ventral view, ectoparamere comprise of two branches proximally, combined medially and curved upward.</p> <p> <b>Female.</b> Body size and coloration similar to male (Figs. 5B; 9C). Brachypterous, portions after mesonotum uncovered. Ovipositor long and slightly longer than cercus. Some samples macroperous and armed with normal elytra (Fig. 4B, D).</p> <p> <b>Etymology.</b> The name refers to its elytra armed with rounded margin apically, and its somewhat oval-like body.</p> <p> <b>Remarks.</b> Holotype and most specimens light brown and there are also some specimens that are darker. Compared with light ones, patterns or stripes of those dark samples are not clear or absent, and the coloration of legs and abdomen are darker. In addition, this species possesses rounded apical end of the tegmina.</p>Published as part of <i>Ma, Libin, Jing, Xuan & Zheng, Yanna, 2021, Integrative taxonomy base on morphology and molecular phylogeny with description of a new genus, Progoniogryllus gen. nov. and two new species (Orthoptera: Grylloidea: Gryllidae; Gryllinae), pp. 523-536 in Zootaxa 4995 (3)</i> on pages 531-532, DOI: 10.11646/zootaxa.4995.3.7, <a href="http://zenodo.org/record/5057465">http://zenodo.org/record/5057465</a>
Progoniogryllus directus Ma & Jing & Zheng 2021, sp. nov.
No full text<i>Progoniogryllus directus</i> sp. nov. <p> <b>Type materials.</b> <b>Holotype. Male. China:</b> Xizang, Chayu, Zhala village, vi-5-2019, Ma, Libin coll. (SNNU). <b>Paratype. China:</b> 2 males, Xizang, Chayu, Zhala village, vi-5-2019, Ma, Libin coll. (SNNU); 1 male, Xizang, Chayu, Xiachayu, vi-6-2019, Ma, Libin coll. (SNNU); 2 males, Xizang, Chayu, vi-13-2019, Yang, qichen coll. (SNNU); 2 females, Xizang, Chayu, Zhala village, vi-5-2019, Ma, Libin coll. (SNNU); 3 females, Xizang, Chayu, Xiachayu, vi-6-2019, Ma, Libin coll. (SNNU).</p> <p> <b>Measurements. Male (n=5):</b> BL 8.8±0.42, HL 1.37±0.08, HW 2.24±0.22, PL 1.83±0.07, PW 2.76±0.06, FWL 4.92±0.50, FWW 3.35±0.10, MTL 2.32±0.13, HFL 5.98±0.23; <b>female (n=2):</b> BL 8.21±0.34, HL 1.29±0.15, HW 2.19±0.04, PL 1.67±0.52, PW 2.69±0.07, MTL 2.61±0.15, HFL 6.22±0.17, OL 6.15±0.22</p> <p> <b>Description. Male.</b> Body smaller than medium species of Gryllinae (Fig. 7A, B). In frontal view, head laterally widened and dorsoventrally short, and vertex broad and flat (Fig. 9B). In dorsal view, head longer than pronotum; occiput widened and slightly convex; vertex inclined; and frons somewhat convex, wide and slightly wider than antennal scape. Antennal scape transverse, shield-like. Epistomal suture shallow, sinuate and medially upward convex. Lower portion of clypeus and labrum depressed. Labrum broad with lateral margins rounded convex and apically arched. End section of maxillary palpus obviously longer than the third; end section of labial palpus conspicuously longer than the total length of remainder two. Pronotum transverse and slightly longer than the half width. Disc of pronotum broad and flattened, anteriorly concave and posteriorly straight, and lateral margin straight and inclined down. Lateral lobes of pronotum broad and flattened with ventral surface slightly inwardly concave. Tegmina very short and not reaching abdominal tip. Tegminal disc broad and flattened, almost rectangular-shaped, slightly arched laterally and pointed rounded apically. Basal field short and slightly longer than 1/3 length of pronotum. Oblique veins two; diagonal vein weakly arched and smoothly jointing with outside margin of mirror. Mirror transverse, somewhat shaped as rhombus with inner and bottom corner rounded. Dividing vein separating a small oval at mirror bottom. Apical field distally straight, very short and shorter than 1/3 length of mirror. Cercus thin and tapering. Outer tympana large and long oval-like; inner tympana very small and oval-like. Hind femur slightly longer than tibia. Subapical spurs six pairs and proximally possessing an additional small one outside. Hind tarsus armed with two rows of spines and numbered more outside.</p> <p>Body colored dark brown dorsally and yellowish-brown ventrally. Occiput ornamented with six yellowishbrown stripes (Fig. 9B). Of them, the outermost ones inclined outward and jointing with yellowish-brown stripes above eyes. Yellowish-brown ornamented above eyes or around ocelli. Occiput, vertex, top portions of frons and inner margin of antennal socket dark brown. Eyes and portions between antennal socket and labrum, including mandible, maxillary and labial palpi yellowish-brown. Pronotum dark brown dorsally and only ornamented with few of yellowish-brown spot laterally. Lateral lobes of pronotum colored yellowish-brown at half lower portions. Elytra yellowish brown with lateral lobes colored dark.Abdomen colored dark brown dorsally and laterally, and yellowishbrown ventrally. Subgenital plate brown. Legs yellowish-brown and ornamented with few of brown spots.</p> <p>Epiphallus transverse (Fig. 8A–C), median lobe weakly convex and truncate apically; lateral lobes short and obtuse, in dorsal view, gap between them large and rectangular-like. Ectoparamere prismatoidal, proximally branched with outside branch thick and inner one thin, and combined as one apically.</p> <p> <b>Female.</b> Body form and coloration similar with male (Figs. 7C, D; 9A). Brachypterous individual armed with elytra bud-like (Fig. 7C). Ovipositor (Fig. 4A, C) yellowish-brown.</p> <p> <b>Etymology.</b> The name refers to its elytra armed with straight margin apically.</p> <p> <b>Remarks.</b> Inner tympana varied, sometimes pit-like and without tympanic membrane and sometimes with a very small tympanic membrane. This species possesses straight apical end of elytra.</p>Published as part of <i>Ma, Libin, Jing, Xuan & Zheng, Yanna, 2021, Integrative taxonomy base on morphology and molecular phylogeny with description of a new genus, Progoniogryllus gen. nov. and two new species (Orthoptera: Grylloidea: Gryllidae; Gryllinae), pp. 523-536 in Zootaxa 4995 (3)</i> on pages 534-535, DOI: 10.11646/zootaxa.4995.3.7, <a href="http://zenodo.org/record/5057465">http://zenodo.org/record/5057465</a>
- …
