143,076 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Raw data of Zhao et al., 2022, Geoderma
No full textRaw data associated with Zhao et al., 2022, Geoderma. Any use of the data set should be approved by the corresponding author Kai Yue at "[email protected]".</p
Milema Zhao & Li 2022, gen. nov.
No full textMilema Zhao & Li, gen. nov. Type species. Milema nuichua Zhao & Li, sp. nov. Diagnosis. This genus can be distinguished from Telema by the following characters: the ratio of the length of embolus/carapace 0.25–0.30 (vs. 0.50–0.65), the presence of a prolateral cymbial apophysis (vs. absence), belt-shaped tibial glands (vs. plate-shaped), the ratio of the length of embolus/bulb 0.38–1.10 (vs. smaller than 0.32); spermatheca sac-like or globular (vs. cane shaped). Description. Total length 0.90–1.15 in male, 0.95–1.20 in female. Carapace 0.40–0.51 long, Carapace pear shaped, pale or dark brown. Six eyes encircled by black or absent. Tibia I 0.52–0.94. Leg formula 1243, leg glands belt shaped. Abdomen blue or for males, bulb small relative to carapace, the length ratio of bulb/carapace 0.25–0.30. Length of cymbium> femur> tibia> patella; cymbial apophysis present prolaterally. Distribution. Southern Vietnam and Southern Thailand. Etymology. The generic name is a combination of the first two letters of millet (referring to the small size) and the latter four letters of Telema (type genus of the family); feminine in gender. Species included. Milema lorkor Zhao & Li, sp. nov., Milema nuichua Zhao & Li, sp. nov. and Milema sai Zhao & Li, sp. nov. Biology. Habitats of this genus are diverse. The type species, M. nuichua Zhao & Li, sp. nov. inhabits leaf litter; M. sai Zhao & Li, sp. nov. is found at cave entrances; and M. lorkor Zhao & Li, sp. nov. is found deep in caves. These spiders have particular morphological characters adapting to their diverse habitats.Published as part of Lin, Yejie, Zhao, Huifeng, Koh, Joseph K H & Li, Shuqiang, 2022, Taxonomy notes on twenty-eight spider species (Arachnida: Araneae) from Asia, pp. 198-270 in Zoological Systematics 47 (3) on page 245, DOI: 10.11865/zs.2022303, http://zenodo.org/record/717585
Numerical simulations of combustion instability in Rijke-Zhao tube
No full textIn this report, a numerical model is developed to investigate the combustion instability in a Rijke-Zhao tube. This study is carried out in an attempt to better understand the internal coupling among pressure and velocity oscillations and heating element changes. Combustion instabilities or oscillations occur in confined geometries and are caused by the interactions between unsteady heat release and acoustic waves [1-4]. However, instabilities occur if the phase shifts between the pressure and heat flux is less than ±90 degree [5]. For a given combustion system, when the Rayleigh criterion [19] is satisfied, the unsteady heat release rate will be increased by amplified pressure fluctuations, and the oscillation amplitude will grow until it reaches the limit cycle.
The mechanisms of instability are numerous, and there is no reliable technique which can express how to predict the occurrence of instability. However, some understanding may be gained on the control mechanisms and characterization of the processed instabilities. Numerical simulation will help to further understand the combustion instabilities.
In this project Ansys Fluent 14® was used to numerically simulate the combustion instability in a Rijke-Zhao tube. The project resulted in successfully simulating the combustion instability (limit cycle) in several different design patterns of Rijke-Zhao tubes, and it also contrasted and compared the results for further study.Bachelor of Engineering (Mechanical Engineering
Xun zhao yu zhou can shu de ge xiang yi xing
No full textChan, King Pak Keven = 尋找宇宙參數的各向異性 / 陳景柏.Thesis Ph.D. Chinese University of Hong Kong 2015.Includes bibliographical references (leaves 104-107).Abstracts also in Chinese.Title from PDF title page (viewed on 29, September, 2016).Chan, King Pak Keven = Xun zhao yu zhou can shu de ge xiang yi xing / Chen Jingbo
Burmalema Zhao & Li 2022, gen. nov.
No full textBurmalema Zhao & Li, gen. nov. Type species. Burmalema shan Zhao & Li, sp. nov. Diagnosis. The new genus resembles Telema Simon, 1882 by lacking a cymbial apophysis, but it can be distinguished by the following: belt-shaped tibial glands (vs. plate-shaped); ratio of embolus/bulb lengths ca. 0.80 (vs. less than 0.42), and twisted embolus (vs. triangular or nearly needle-shaped); females can be distinguished by the L-shaped endogyne with long and sclerotized tubes (vs. cane shaped, with membranous tubes). The new genus can be distinguished from all the other genera of Telemidae by the absence of a cymbial apophysis (vs. presence). Description. Total length 1.25–1.53, carapace 0.52–0.90 long. Eyes vestigial. Carapace, sternum, endites, labium and legs light brown. Endites longer than wide; labium wider than long. Tibia I 0.90–1.00. Leg formula 1243. In male, length of cymbium> femur> tibia> patella; prolateral cymbial apophysis absent; embolus spiraled and long relative to bulb. Endogyne simple, with tube inside, expended distally. Distribution. Myanmar. Etymology. The generic name is derived from “ Burma ”, referring the name of type locality, Myanmar, and “-lema” is a convention from Telema, the type genus of the family; feminine in gender. Species included. Burmalema shan sp. nov.Published as part of Lin, Yejie, Zhao, Huifeng, Koh, Joseph K H & Li, Shuqiang, 2022, Taxonomy notes on twenty-eight spider species (Arachnida: Araneae) from Asia, pp. 198-270 in Zoological Systematics 47 (3) on page 238, DOI: 10.11865/zs.2022303, http://zenodo.org/record/717585
Experimental measurement of combustion instabilities in Rijke-Zhao tubes
No full textThis project aims to investigate the onset and selection of combustion-excited oscillations in uniquely configured combustion systems through experimental approaches such as thermal imaging and flow visualization. The insights gained on the behavior of such combustion systems can be used in future researches to develop control methodologies to minimize and eliminate combustion instability, or to improve efficiencies in applications such as industrial dryers and engine systems. In this paper, the theoretical concept of pulse combustion will also be explained and demonstrated.
The experimental set-up consists of Rijke-Zhao tubes of various configurations, being placed vertically above a flame. The Rijke-Zhao tubes are made of quartz and they are Y-shaped, with configurations varying in terms of the branch lengths and angles. High speed camera at 20 frames per second (fps) was used to capture flow motion within the quartz tubes, while infrared camera was used to display the temperature distribution. To measure the pressure field within the tube, two arrays of microphones were strategically positioned along the upper branches. Finally, a flow anemometer and a K-type thermocouple were used to measure the flow velocity and flow temperature at the ends of the branches respectively. The results gathered were tabulated and analyzed.Bachelor of Engineering (Aerospace Engineering
Chao Yuen Ren (1892–1982)
No full textY. R. Chao is easily the most famous linguist to have come out of China. Born before the end of the last dynasty in China, he received a traditional Confucian education, but was also one of the first Chinese people to be sent to the West for training in modern Western science (under the Boxer Indemnity Fund). The remarkable breadth and scope of his studies included physics, mathematics, linguistics, musical and literary composition, and translation, and he was a pioneer in many of these fields
Liangcoris Zhao, Cai & Ren
No full textLiangcoris Zhao, Cai & Ren, gen. nov. Type species. Liangcoris yangae Zhao, Cai & Ren, sp. nov. Diagnosis. Medium sized, oblong, smooth, shiny. Head (including neck) distinctly shorter than pronotum (Fig. 1); eyes large, protruding laterally; ocelli widely separated; anteocular portion slightly shorter than postocular portion (including neck); first antennal segment nearly as long as head (Fig. 1); rostrum robust and recurved, second segment nearly as long as first, apical segment shortest. Pronotum with anterior lobe longer than half of posterior; anterior pronotal lobe developed, longitudinal median depression short, neither reaching collar anteriorly nor transverse constriction of pronotum posteriorly (Fig. 1); posterior pronotal lobe with disk distinctly depressed, longitudinal depression, which not reaching posterior margin of pronotum (Fig. 1); lateral pronotal angles rounded, posterior margin of pronotum slightly convex, posterior angles rounded; mesopleuron without a tubercular process near border of anterior margin; scutellum nearly triangular and unarmed; femora incrassate and subapical portion constricted, fore femora thickest. Abdomen slightly dilated laterally. Distribution. China. Etymology. The new generic name refers to the shiny surface of the new species. “Liang” in Chinese means bright and shiny, and “coris” in Greek means bug. Masculine. Remarks. The body of the new genus is smooth and shiny, which is distinctly different from that of all morphologically similar genera. The general body plan and the middle longitudinal sulcus on the anterior pronotal lobe resemble those of the genus Rhynocoris, but in the new genus the first antennal segment is subequal to the head and the femora are moderately thickened (vs. in Rhynocoris, where the first antennal segment is longer than head, mid and hind femora are not distinctly incrassate). The new genus is allied to Coranus in first antennal segment subequal in length to head, but mesopleuron lacks a tubercle near border of anterior margin, the scutellum is unarmed, and legs are unnodulose in new genus (vs. the mesopleuron has a tubercle near border of anterior margin, the scutellum is armed, and legs are nodulose in Coranus). The new genus is similar to Stalireduvius: the first antennal segment is subequal in length to the head and the mesopleuron lacks a tubercle near border of anterior margin; but the new genus can be separated from the latter in legs are unnodulose (vs. the legs nodulose in Stalireduvius). These four genera can be distinguished with the following key.Published as part of Zhao, Ping, Cai, Wanzhi & Ren, Dong, 2007, Liangcoris, a new genus of Harpactorinae (Hemiptera: Reduviidae) from China, pp. 63-68 in Zootaxa 1405 on pages 63-64, DOI: 10.5281/zenodo.17548
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