275 research outputs found
Ophthalmothrips elongatus Li & Dang 2022, sp. nov.
No full text<i>Ophthalmothrips elongatus</i> Li & Dang, sp. nov. (Figs 1–15) <p>Description. Holotype female (macropterous). Body length 4.2 mm. Body uniform brown; antennal segment III yellow, but brownish apically, IV yellow at basal half, brown at apical half, V yellow at basal 1/3, rest of antennae uniform brown (Fig. 10); tube darkest; all major setae yellowish-brown.</p> <p>Head. Head about two times as long as wide (Figs 1, 8); head elongate, preocular projection about 1.4 times as long as wide; compound eyes prolonged posteriorly on ventral surface (Fig. 1); interocellar setae well developed, longest setae on head, pointed at apex; postocular setae small, not reaching posterior margin of eyes, pointed at apex, arise behind inner margin of eyes; cheeks with several pairs of spine-like setae (Fig. 1). Antennae 8-segmented, slender, segment III longest, about 5 times as long as wide, III with 1+1 sense cone, IV with 2+2 (Figs 2, 10). Mouth-cone short and rounded, maxillary stylets V-shaped, retracted into head one third way to posterior margin of eyes (Fig. 1).</p> <p>Thorax. Pronotum almost smooth, notopleural sutures complete (Figs 1, 8), aa and am slightly developed, pointed at apex, ml and pa developed, longer than aa, pointed at apex, epim well-developed, blunt at apex; basantra surround mouth-cone, ferna developed (Figs 1, 12). Mesopresternum boat-shaped (Figs 4, 12). Metanotal median setae well developed, metanotum smooth anterior middle, metathoracic sternopleural sutures absent. Fore wing broad, three pairs of sub-basal setae pointed at apex, S1 smaller, shorter than S2, S3 longest (Fig. 3), with 15–16 duplicated cilia. All tibia and tarsus without tooth.</p> <p>Abdomen. Pelta triangular, with entire reticulation (Figs 5, 11); abdominal tergites II–VII dorsal with reticulation in front half, each with two pairs of wing-retaining setae (Fig. 11); tergite IX setae almost as long as tube; tube smooth, shorter than head, anal setae about as long as tube (Figs 7, 13).</p> <p>Measurements (holotype female in microns). Body length 4200. Head length 540, width across eyes 240; preocular projection length 170, width 125; eyes length 130, ventral length 180; postocular setae length 20. Antennae length 810, segment I–VIII lengths (maximum width) 70 (50), 80 (40), 170 (35), 140 (35), 115 (30), 90 (30), 65 (30), 65 (20). Pronotum length 225, width 300, length of pronotal setae, am 10, aa 15, ml 30, epim 75, pa 35. Metanotal median setae length 15. Fore wing length 1470, sub-basal setae S1– S3, 20, 55 and 90. Abdominal sternite IX S1–S3 length, 375, 445 and 265, tube length 375, basal width 115, at apex 60, anal setae length 410.</p> <p>Male (macroptera). Very similar to female, but smaller, fore tarsal without tooth (Figs 9, 14).</p> <p>Measurements (paratype male in microns). Body length 3860. Head length 505, width across eyes 230; preocular projection length 145, width 120; eyes length 115, ventral length 160; postocular setae length 20. Antennae length 740, segment I–VIII lengths (maximum width) 70 (50), 75 (35), 160 (35), 125 (35), 95 (30), 70 (30), 60 (25), 60 (20). Pronotum length 180, width 270, length of pronotal setae, am 15, aa 15, ml 25, epim 65, pa 35. Metanotal median setae length 20. Fore wing length 1120, sub-basal setae S1– S3, 20, 50 and 65. Abdominal sternite IX S1–S3 length, 265, 310 and 215, tube length 305, basal width 105, at apex 60, anal setae length 300.</p> <p>Material examined. Holotype ♀, China, Hunan, Yongzhou, Dupangling National Nature Reserve (25.46°N, 111.37°E; elev. 380 m), from the root of Poaceae grasses (Fig. 15), 4.IX.2020, coll. Xia Wang. Paratype. 1♂, same data as holotype.</p> <p> Etymology. This species name is composed of the Latin word, “ <i>elongatus</i> ”, based on its elongated preoclular projection of head.</p> <p> Comments. This new species can be recognized as the genus <i>Ophthalmothrips</i> by the elongated preocular projection of the head, which is about 1.4 times as long as its wide. Similarly, this character is also present to <i>O. faurei</i> and <i>O. longiceps</i>. But the new species differs by having postocular setae small (not reaching at posterior margin of eyes), interocellar setae, pronotal epimal setae well-developed and pelta triangular with slightly rounded laterally. In <i>O</i>. <i>faurei</i>, the original description showed that it had postocular setae well-developed (Ananthakrishnan, 1964); Ananthakrishnan (1973) redescribed both sexes of <i>O</i>. <i>faurei</i> in detail, of which its postocular setae were also developed, interocellar setae absent, and one pair of median dorsal setae of head well-developed (but we think that these setae were probably located ventrally.); Haga (1975) studied Ananthakrishnan’s specimens of <i>O</i>. <i>faurei</i>, and showed that the pronotal epimeral setae are small and the interocellar setae developed. The genus <i>Ophthalmothrips</i> was reviewed worldwide by Minoura & Mound (2019) as the latest research. They recorded only one female represented as <i>O</i>. <i>faurei</i> from Guilin City in China, but the author helped to re-check this specimen, and found its head was too dark to see any characters. And the specimens from Japan identified as <i>O</i>. <i>faurei</i> together with Chinese specimen showed developed postocular setae. Thus, the only female specimen identified as <i>faurei</i> need to further study in the future. In <i>O. longiceps</i>, it is distinguished from <i>O</i>. <i>elongatus</i> Li & Dang, <b>sp. nov.</b> by the shorter preocular projection (wider than long), the well-developed postocular setae, and the pelta sharply pointed laterally.</p> <p> Figures 16–25. <i>Ophthalmothrips formosanus</i> (16–17, 21–22, 24), <i>O. miscanthicola</i> (18, 20, 23) and <i>O. longiceps</i> (19, 25). 16. Head and pronotum; 17–19. Antenna; 20, 22. Fore leg, female; 21. Fore leg, male; 23–25. Pelta.</p>Published as part of <i>Li, Yanqiao, Zhao, Linpeng, Li, Chengwen & Dang, Lihong, 2022, Review of the genus Ophthalmothrips Hood (Thysanoptera: Phlaeothripidae) from China, with a new species, pp. 305-312 in Zoological Systematics 47 (4)</i> on pages 306-309, DOI: 10.11865/zs.2022403, <a href="http://zenodo.org/record/10940767">http://zenodo.org/record/10940767</a>
The association between parents’ ethnic socialization and interethnic contact among Hui and Han in China and the moderating role of essentialism
No full textIn a multiethnic country like China, ethnic membership is an important dimension ofsocial construction, and interethnic contact is a necessary component of socialinteractions. Family is the context where ethnic socialization takes place and whereparents play a relevant role. The present study focused on the Hui‐Han interethniccontext. Measures of perceived parent's ethnic socialization, interethnic contact,and essentialism were administrated to Hui minority (N= 560) and Han majority(N= 954) secondary students. Results indicated that parents' positive ethnicsocialization (cultural socialization/pluralism, promotion of harmony) was associatedwith greater positive and lower negative contact, while negative ethnic socialization(preparation for bias, promotion of mistrust) had opposite effects. Essentialist viewsof ethnicity moderated the associations of perceived parents' positive ethnicsocialization with positive contact: the association between positive ethnicsocialization and positive contact was stronger among individuals with lower(vs. higher) essentialist views. Results did not differ across the majority and theminority group. Implications for prompting positive interethnic interactions andpreventing negative contact are discussed
Ophthalmothrips longiceps
No full text<i>Ophthalmothrips longiceps</i> (Haga) <p> <i>Pyrgothrips longiceps</i> Haga, 1975: 264.</p> <p> <i>Ophthalmothrips longiceps</i> (Haga): Mound & Palmer, 1983: 71; Han, 1997: 337; Okajima, 2006: 138.</p> <p>Diagnosis. Head about two times as long as wide; head elongate, preocular projection wider than long; postocular setae well-developed, but shorter than interocellar setae, blunt at apex. Antennae 8-segmented, segment III longest, about 5 times as long as wide, III with 1+1 sense cones, IV with 2+2 (Fig. 19). Maxillary stylets V-shaped. Pronotum with five pairs of developed major setae, pointed to blunt at apex. Mesopresternum boat-shaped. Fore tarsal tooth absent in both sexes. Pelta triangular, with entire reticulation (Fig. 25); abdominal tergites II–VII with two pairs of well-developed wing-retaining setae; tube shorter than head, anal setae slightly shorter than tube.</p> <p>Distribution. China (Hainan, Taiwan); Japan.</p> <p>Material examined. China, Taiwan (Kenting), 1♀ 1♂, from dead leaves, 22–24.V.1972, coll. Shuji Okajima (IZCAS); China, Hainan, 1♂, 11.IV.1958, coll. Xiangling Meng (IZCAS).</p> <p> Comments. Described from Japan on decayed grasses by Haga (1975), this species was recorded from Taiwan, China by Han (1997). Here, one female and one male from Taiwan, and one male from Hainan were studied. <i>O. longiceps</i> is similar to <i>O</i>. <i>elongatus</i> Li & Dang, <b>sp. nov.</b> by having an elongate preocular projection of the head and lacking fore tarsal teeth in both sexes, but they have obvious distinct characters (see Comments of the new species).</p>Published as part of <i>Li, Yanqiao, Zhao, Linpeng, Li, Chengwen & Dang, Lihong, 2022, Review of the genus Ophthalmothrips Hood (Thysanoptera: Phlaeothripidae) from China, with a new species, pp. 305-312 in Zoological Systematics 47 (4)</i> on page 310, DOI: 10.11865/zs.2022403, <a href="http://zenodo.org/record/10940767">http://zenodo.org/record/10940767</a>
Ophthalmothrips yunnanensis Cao, Guo & Feng
No full text<i>Ophthalmothrips yunnanensis</i> Cao, Guo & Feng <p> <i>Ophthalmothrips yunnanensis</i> Cao, Guo & Feng, 2010: 263.</p> <p>Diagnosis. Head about two times as long as wide, head elongate, preocular projection wider than long; postocular setae developed, slightly shorter than interocellar setae. Antennae 8-segmented, segment III longest, about 8 times as long as wide. Maxillary stylets V-shaped, retracted into head. Pronotum with five pairs of developed major setae, blunt at apex. Mesopresternum boat-shaped. Fore tarsal tooth present in both sexes. Pelta triangular, with entire reticulation, abdominal tergites II–VII with two pairs of small and straight wing-retaining setae in macropterous; tube shorter than head, anal setae slightly shorter than tube.</p> <p>Distribution. China (Yunnan).</p> <p> Comments. Known only from Yunnan, China, this species is distinguished by the small and straight wing-retaining setae in macropterae according to the original description (Cao <i>et al</i>., 2010). The character is relatively rare in the genus, even in Idolothripinae species.</p> <p> <b>Funding</b> The work was supported by the National Natural Sciences Foundation of China (31702042), Key project of Natural Science Basic Research program of Shaanxi Province (2019JZ-34), the Undergraduate Innovation and Entrepreneurship Training program [202210720037], and a Young Talent Fund of University Association for Science and Technology in Shaanxi, China (20180209).</p> <p> <b>Acknowledgements</b> The authors are grateful to Laurence Mound (CSRIO, Australia) for checking the <i>Ophthalmothrips</i> specimens, and to Xia Wang for collecting the specimens.</p>Published as part of <i>Li, Yanqiao, Zhao, Linpeng, Li, Chengwen & Dang, Lihong, 2022, Review of the genus Ophthalmothrips Hood (Thysanoptera: Phlaeothripidae) from China, with a new species, pp. 305-312 in Zoological Systematics 47 (4)</i> on page 311, DOI: 10.11865/zs.2022403, <a href="http://zenodo.org/record/10940767">http://zenodo.org/record/10940767</a>
Ophthalmothrips miscanthicola
No full text<i>Ophthalmothrips miscanthicola</i> (Haga) <p> <i>Pyrgothrips miscanthicola</i> Haga, 1975: 265.</p> <p> <i>Ophthalmothrips miscanthicola</i> (Haga): Mound & Palmer, 1983: 71; Han, 1997: 339.</p> <p>Diagnosis. Head about two times as long as wide; head elongate, preocular projection wider than long; postocular setae developed, as long as interocellar setae. Antennae 8-segmented, segment III longest, about 4 times as long as wide, III with 1+1 sense cones, IV with 2+2 (Fig. 18). Maxillary stylets V-shaped, retracted into head. Pronotum with five pairs of developed major setae, pointed at apex. Mesopresternum boat-shaped. Fore tarsal tooth present in both sexes (Fig. 20). Pelta triangular, with entire reticulation (Fig. 23); abdominal tergites II–VII with two pairs of well-developed wing-retaining setae; tube shorter than head, anal setae shorter than tube.</p> <p>Distribution. China (Fujian, Guangdong, Sichuan, Hainan); Japan.</p> <p>Material examined. China, Sichuan, 6♀ 4♂, 2.VII.1984, coll. Shuyong Wang (IZCAS); China, Guangxi, 1♂, from dead leaves, 2.VI.2011, coll. Lihong Dang (IZCAS); Japan, 1♀ 1♂, 2.VIII.1976, coll. Kobayashi (IZCAS).</p> <p> Comments. Described originally from Japan (Haga, 1975), <i>O. miscanthicola</i> was also recorded from Korea (Okajima, 2006). In China, it is widely distributed in the temperate regions of southern China (Zhang, 1984; Han & Cui, 1992; Han, 1997; Cao <i>et al.</i>, 2010). In here, seven females and four males are studied from Sichuan and Guangxi.</p>Published as part of <i>Li, Yanqiao, Zhao, Linpeng, Li, Chengwen & Dang, Lihong, 2022, Review of the genus Ophthalmothrips Hood (Thysanoptera: Phlaeothripidae) from China, with a new species, pp. 305-312 in Zoological Systematics 47 (4)</i> on page 310, DOI: 10.11865/zs.2022403, <a href="http://zenodo.org/record/10940767">http://zenodo.org/record/10940767</a>
Ophthalmothrips formosanus
No full text<i>Ophthalmothrips formosanus</i> (Karny) <p> <i>Idolothrips formosanus</i> Karny, 1913: 130.</p> <p> <i>Pyrgothrips formosanus</i> (Karny): Haga, 1975: 270.</p> <p> <i>Ophthalmothrips formosanus</i> (Karny): Mound & Palmer, 1983: 71.</p> <p>Diagnosis. Head about two times as long as wide; head elongate, preocular projection wider than long; postocular setae well-developed, distinctly longer than interocellar setae, pointed at apex (Fig. 16). Antennae 8-segmented, segment III longest, about 3.6 times as long as wide, III with 1+1 sense cones, IV with 2+2 (Fig. 17). Maxillary stylets V-shaped, retracted into head but not reaching to posterior margin of eyes (Fig. 16). Pronotum with five pairs of developed major setae, blunt to expanded at apex (Fig. 16). Mesopresternum boat-shaped. Fore tarsal tooth absent in both sexes (Figs 21–22). Pelta triangular, with entire reticulation (Fig. 24); abdominal tergites II–VII with two pairs of wing-retaining setae; tube smooth, shorter than head, anal setae slightly shorter than tube.</p> <p>Distribution. China (Henan, Taiwan).</p> <p>Material examined. China, Henan, 2♀ 1♂, 13.VII.1985, coll. Yunfa Han (IZCAS); China, Henan, 2♂, from dried-up elm bark, 18.IV.1957, coll. Yunfa Han (IZCAS).</p> <p>Comments. This species was described originally from Taiwan based on one female specimen. Dang & Qiao (2013) recorded it from the Chinese mainland in Henan Province. Two females and three males from dried-up elm bark are studied here.</p>Published as part of <i>Li, Yanqiao, Zhao, Linpeng, Li, Chengwen & Dang, Lihong, 2022, Review of the genus Ophthalmothrips Hood (Thysanoptera: Phlaeothripidae) from China, with a new species, pp. 305-312 in Zoological Systematics 47 (4)</i> on page 310, DOI: 10.11865/zs.2022403, <a href="http://zenodo.org/record/10940767">http://zenodo.org/record/10940767</a>
Mode-locked fiber laser of 3.5 μm using a single-walled carbon nanotube saturable absorber mirror
No full textWe report on a mid-infrared fiber laser that uses a single-walled carbon nanotube saturable absorber mirror to realize the mode-locking operation. The laser generates 3.5 µm ultra-short pulses from an erbium-doped fluoride fiber by utilizing a dual-wavelength pumping scheme. Stable mode-locking is achieved at the 3.5 µm band with a repetition rate of 25.2 MHz. The maximum average power acquired from the laser in the mode-locking regime is 25 mW. The experimental results indicate that the carbon nanotube is an effective saturable absorber for mode-locking in the mid-infrared spectral region
High power Er:YAP laser at 2.92 μm based on incoherent beam combining
No full textWe report on a high-power Er3+-doped yttrium aluminum perovskite (Er:YAP) laser system run by incoherent beam combining at RT. A stable continuous-wave (CW) laser beam at 2.92 μm with an average power of 8.2 W is generated. To the best of our knowledge, this is the highest average power achieved from CW Er3+-doped solid-state lasers above 2.9 μm. No power saturation is observed, indicating that the output power can be further scaled up. Moreover, the experimental results show that the beam quality is maintained during the beam combining process.journal articl
Efficient Processing and Delivery of Multimedia Data
No full textThe explosion of multimedia data on the Internet in recent years has greatly enriched people's online experience. However, it also poses a great challenge to analyze and process, and then deliver such content to the worldwide audience. This dissertation presents novel approaches to improve the overall efficiency of the stack by tailoring software design to hardware properties, as well as optimize systems by exploiting workload characteristics using learning-based approaches.
First, to improve the caching performance of the flash-memory caches for content delivery network, this thesis proposes RIPQ, a framework for efficient and advanced caching with flash memory. Traditional implementations of these algorithms generate random writes that perform poorly on flash devices, decreasing the device's performance and lifespan. RIPQ overcomes this issue by aggregating small writes, colocating items with similar priorities, and perform lazy updates to achieve low over- head. By providing a priority queue interface, it allows a variety of caching algorithms to be easily implemented.
Second, this thesis proposes Chess, which uses popularity prediction for higher quality video streaming. Although better encodings improve video streaming, they are also compute-intensive, and it is infeasible to encode all videos uploaded to Face- book with the highest quality codec. However, because the accesses to videos are highly skewed, we may obtain most of the benefit by only running the compute- intensive encoding on a small portion of popular videos, and the challenge lies in how to accurately and scalably run popularity prediction to detect those videos before- hand. Chess meets this demand by designing an approximate but fast base predictor with the access history information, and using an online learning method to combine multiple such predictors as well as the social signals to boost accuracy.
Lastly, this thesis investigates how to accelerate deep learning models on many-core CPUs. Deep learning is now widely used for analyzing multimedia data, but it is compute-intensive, which constitutes its major bottleneck. The manycore CPU, combining both high FLOPS and a flexible computing model, is a promising solution to this problem. However, existing frameworks are still mainly optimized for GPU, and do not run efficiently on this architecture. To overcome this issue, this thesis proposes Graphi, the first attempt to accelerate the execution of computation graphs for deep learning models on this architecture. Graphi determines the optimal parallel settings with a profiling step, runs concurrent operations with low contention, and further reduces execution makespan with critical-path first scheduling. This thesis demonstrated that these techniques can achieve significant speedups over TensorFlow on manycore CPUs
Direct uptake of electrode electrons for autotrophic denitrification by Thiobacillus denitrificans
No full textIn this work, we reported that Thiobacillus denitrificans could utilize poised electrodes directly as sole electron donors for autotrophic denitrification in bioelectrochemical systems. A potential-dependent denitrification process was observed and catalyzed by the biofilms colonizing on the electrode surface, with a maximum nitrate removal rate of 21.12 +/- 1.67 mmol NO3--NL-1 day(-1) m(-2) at a potential of -500 mV. The intermediate products (nitrite and N2O) suggested that denitrification was the main electron transfer pathway, and dissimilatory nitrate reduction to ammonium was not present in this process. Cyclic voltammetry revealed the acclimation potentials played an important role in the electrochemical activity of the biofilms. Electron transport inhibitors suggested the participation of complex I, II, and III in the electron transfer during the denitrification. (C) 2015 Elsevier B.V. All rights reserved
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