150,895 research outputs found
FIGURE. Flowering (A) and fruiting (B) specimens of Thalictrum spiristylum (= T. atriplex) from the exact type locality, i.e. Shuicaoba in Ninglang county in northwestern Yunnan, China. A. Y.P. Zeng & Y.F. Luo 495 (IBSC). B. Y.P. Zeng 590 (IBSC). in Thalictrum spiristylum (Ranunculaceae), described from northwestern Yunnan, China, is merged with T. atriplex
No full textFIGURE. Flowering (A) and fruiting (B) specimens of Thalictrum spiristylum (= T. atriplex) from the exact type locality, i.e. Shuicaoba in Ninglang county in northwestern Yunnan, China. A. Y.P. Zeng & Y.F. Luo 495 (IBSC). B. Y.P. Zeng 590 (IBSC).Published as part of Zeng, You-Pai, Yuan, Qiong & Yang, Qin-Er, 2022, Thalictrum spiristylum (Ranunculaceae), described from northwestern Yunnan, China, is merged with T. atriplex, pp. 1-20 in Phytotaxa 538 (1) on page 6, DOI: 10.11646/phytotaxa.538.1.1, http://zenodo.org/record/633196
FIGURE. Mitotic metaphase chromosomes of Thalictrum longistipitatum (A) (2n = 14), T. tsawarungense (B, C) (2n = 14), T. wangii (D) (2n = 14), and T. rostellatum (E, F) (2n = 28), all same scale. A. China, Xizang, Bomi, L. Wang, X.Q. Guo & Y.P. Zeng 3350 (IBSC). B. China, Xizang, Bomi, L. Wang, X.Q. Guo & Y.P. Zeng 3313 (IBSC). C. China, Xizang, Bomi, L. Wang, X.Q. Guo & Y.P. Zeng 3317 (IBSC). D. China, Yunnan, Lijiang, Y.P. Zeng & Y.F. Luo 200 (IBSC). E. China, Xizang, Gyirong, L. Wang, X.Q. Guo & Y.P. Zeng 2732 (IBSC). F. China, Xizang, Mainling, L. Wang, X.Q. Guo & Y.P. Zeng 3295 (IBSC). in Thalictrum hengduanshanense and T. longistipitatum (Ranunculaceae), two new species from southeastern Xizang and northwestern Yunnan, China
No full textFIGURE. Mitotic metaphase chromosomes of Thalictrum longistipitatum (A) (2n = 14), T. tsawarungense (B, C) (2n = 14), T. wangii (D) (2n = 14), and T. rostellatum (E, F) (2n = 28), all same scale. A. China, Xizang, Bomi, L. Wang, X.Q. Guo & Y.P. Zeng 3350 (IBSC). B. China, Xizang, Bomi, L. Wang, X.Q. Guo & Y.P. Zeng 3313 (IBSC). C. China, Xizang, Bomi, L. Wang, X.Q. Guo & Y.P. Zeng 3317 (IBSC). D. China, Yunnan, Lijiang, Y.P. Zeng & Y.F. Luo 200 (IBSC). E. China, Xizang, Gyirong, L. Wang, X.Q. Guo & Y.P. Zeng 2732 (IBSC). F. China, Xizang, Mainling, L. Wang, X.Q. Guo & Y.P. Zeng 3295 (IBSC).Published as part of Zeng, You-Pai, Yuan, Qiong & Yang, Qin-Er, 2022, Thalictrum hengduanshanense and T. longistipitatum (Ranunculaceae), two new species from southeastern Xizang and northwestern Yunnan, China, pp. 1-20 in Phytotaxa 571 (1) on page 16, DOI: 10.11646/phytotaxa.571.1.1, http://zenodo.org/record/727042
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text linkWe 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
Optimal beaconing control for epidemic routing in delay tolerant networks
No full textOwing to the uncertainty of transmission opportunities between mobile nodes, the routing in delay-tolerant networks (DTNs) exploits the mechanism of opportunistic forwarding. Energy-efficient algorithms and policies for DTN are crucial to maximizing the message delivery probability while reducing the delivery cost. In this contribution, we investigate the problem of energy-efficient optimal beaconing control in a DTN. We model the message dissemination under variable beaconing rate with a continuous-time Markov model. Based on this model, we then formulate the optimization problem of the optimal beaconing control for epidemic routing and obtain the optimal threshold policy from the solution of this optimization problem. Furthermore, through extensive numerical results, we demonstrate that the proposed optimal threshold policy significantly outperforms the static policy with constant beaconing rate in terms of system energy consumption savings
In the web of history: Zeng Fanzhi's recent paintings
No full textThe article discusses the new series of paintings that Chinese artist Zeng Fanzhi (b. 1964) recently exhibited at Gagosian Gallery in London. In his monumental series inspired by the drawings of European Renaissance masters Albert Dürer and Leonardo da Vinci, Zeng adds a further dimension to his longstanding exploration of key elements of the medium, such as the relationship between abstraction and figuration, tradition and originality, expression and representation and Eastern and Western aesthetics, contributing to the vitality of the pictorial tradition
Pragmatic Case Studies as a Source of Unity in Applied Psychology
No full textTo unify or not to unify applied psychology: that is the question. In this article we review pendulum swings in the historical efforts to answer this question—from a comprehensive, positivist, “top-down,” deductive yes between the 1930s and the early 60s, to a postmodern no since then. A rationale and proposal for a limited, “bottom-up,” inductive yes in applied psychology is then presented, employing a case-based paradigm that integrates both positivist and postmodern themes and components. This paradigm is labeled “pragmatic psychology” and, its specific use of case studies, the “Pragmatic Case Study Method” (“PCS Method”). We call for the creation of peer-reviewed journal-databases of pragmatic case studies as a foundational source of unifying applied knowledge in our discipline. As one example, the potential of the PCS Method for unifying different angles of theoretical regard is illustrated in an area of applied psychology, psychotherapy, via the case of Mrs. B. The article then turns to the broader historical and epistemological arguments for the unifying nature of the PCS Method in both applied and basic psychology.Peer reviewe
Batrisiella riparia Yin & Zeng 2023, sp. nov.
No full text<i>Batrisiella riparia</i> Yin & Zeng, sp. nov. <p>(Figs 1, 3)</p> <p> Chinese common name: <b>DZḳṁŧDzfim</b></p> <p> <b>Type material</b> (67 exx.). <b>Holotype: CHINA:</b> J, ‘China: Hubei, Xianning City, Chongyang Co., Shuikeng Vill., 29°18′22″N, 114°10′23″E, 165 m, 16-17.vii.2023, riverbank, under stone, Ting-Kai Zeng, <b>AE</b> ẌṪOiǥŵDzffiṁṻ ḦAEñƃäŀ ’ (SNUC). <b>Paratypes: CHINA:</b> 37 JJ, 29 ♀♀, same collecting data as for holotype (SNUC).</p> <p> <b>Diagnosis.</b> <i>Male</i>. Body length approximately 1.7–1.8 mm. Head subtruncate at base; vertex with curved transverse sulcus posterior to level of antennal tubercles, with long mediobasal carina, vertexal foveae moderately distinct and asetose; antenna relatively long, antennomeres each elongate, lacking modification. Discal stria of elytron extending posteriorly to approach posterior margin. Metafemur greatly swollen at apical 3/5 of dorsal margin. Abdomen dorsally with tergite 1 (IV) longer than 2–4 (V–VII) combined, simple. Aedeagus strongly asymmetric, ventral stalk of median lobe much narrower than dorsal lobe. <i>Female.</i> Body length approximately 1.7–1.8 mm, metafemur lacking modification, genital complex as in Figure 1I.</p> <p> <b>Description.</b> <i>Male</i>. Body (Fig. 1A) length 1.73–1.79 mm; color reddish-brown, tarsi and mouthparts lighter in color. Dorsal surface of body covered with relatively short pubescence.</p> <p>Head (Fig. 1B) subtruncate at base, much wider than long, length 0.37 mm, width across eyes 0.42 mm; vertex finely punctate, convex at middle, with moderately distinct, asetose and broadly separated vertexal foveae (dorsal tentorial pits), with short, curved transverse sulcus at level of posterior to antennal tubercles, mediobasal carina extending posteriorly to occipital constriction and anteriorly to sulcus (level of anterior margin of eyes), antennal tubercles moderately raised, surrounding area roughly punctate; frons coarsely punctate broadly and shallowly impressed medially, confluent with clypeus at middle, anterolaterally with thin, oblique carinae; clypeus with rough surface, its anterior margin carinate and moderately raised; ocular-mandibular carinae complete. Venter with tiny gular foveae (posterior tentorial pits) originating from shared small, transverse opening, with distinct median carina extending from opening anteriorly to mouthparts. Compound eyes greatly prominent, each composed of approximately 32 large ommatidia. Antenna 1.0 mm long, lacking modification; antennomere 1 thick and short, anterolateral margin with small hyaline, lamellar structure (Fig. 1C), antennomeres 2–7 each elongate, 7 longer than 6 and 8, 8 shortest, elongate, 9–11 enlarged, forming indistinct club, 10 as long as but broader than 9, 11 largest, slightly shorter than 9 and 10 combined (18:21), sub-fusiform, truncate at base.</p> <p>Pronotum (Fig. 1B) slightly longer than wide, length 0.41–0.42 mm, width 0.40–0.41 mm, widest at middle; lateral margins rounded; disc moderately convex, finely punctate, with median longitudinal sulcus as long as semicircular lateral sulci in dorsal view; lacking median antebasal fovea, with complete, deep transverse antebasal sulcus connecting lateral antebasal foveae, with distinct antebasal spines; outer and inner pair of basolateral foveae small. Prosternum with anterior part slightly longer than coxal part, with small lateral procoxal foveae; hypomeral groove complete, with small lateral antebasal hypomeral impression; margin of coxal cavity thinly carinate.</p> <p>Elytra much wider than long, length 0.57 mm, width 0.66–0.67 mm; each elytron with two large, widely separated basal foveae, lacking subbasal fovea; humeri roundly protuberant; discal striae long, slightly curved, extending from outer basal foveae to approximately apical 4/5 of elytral length; subhumeral foveae small, carinate marginal striae extending posteriorly from fovea to apex of elytra. Metathoracic wings fully developed.</p> <p>Mesoventrite short, fully demarcated from metaventrite by oblique lateral carinae, with pair of admesal carinae; setose median mesoventral foveae broadly separated, lateral mesoventral foveae large and setose, forked internally. Metaventrite weakly convex adjacent to middle, with pairs of setose lateral mesocoxal and lateral metaventral foveae located lateral and posterior to coxal cavities, respectively, posterior margin with small and narrow split at middle.</p> <p>Legs elongate; mesotibia with small spur at apex; metafemur (Fig. 1D) distinctly clavate, greatly swollen on dorsal side, forming two projections and with setose sulcate area between them, proximal area with dense, short sensory setae.</p> <p>Abdomen slightly narrower than elytra, widest at basolateral margins of tergite 1 (IV), length 0.49–0.51 mm, width 0.61 mm; lacking modification. Tergite 1 (IV) in dorsal view longer than 2–4 (V–VII) combined; setose basal sulcus laterally ended at inner pair of basolateral foveae, with outer pair of basolateral foveae lateral to sulcus, discal carinae thin and short, indistinct; tergites 2 and 3 (V and VI) each short, lacking fovea, 4 (VII) as long as 2 and 3 combined along middle, with one pair of small basolateral foveae, 5 (VIII) semicircular, posterior margin broadly and roundly emarginate at middle. Sternite 2 (IV) with one pair of mediobasal foveae and one pair of large basolateral sockets, with one pair of short lateral carinae; midlength of sternite 2 as long as 3–5 (V–VII) combined, 3–5 each short, successively shorter, lacking fovea, 6 (VIII) greatly transverse, posterior margin evenly roundly curved, sternite 7 (IX) (Fig. 1E) suboval, apical half moderately sclerotized, basal half membranous, apical margin with few scattered long setae.</p> <p>Aedeagus (Fig. 1F–H) 0.27 mm long, strongly asymmetric; median lobe with greatly expanded basal capsule and large, suboval foramen, with long, extended basoventral projection, ventral stalk of median lobe shorter and narrower than dorsal lobe, in lateral view sharply narrowing toward apex, in axial view twisted and narrowed at middle; dorsal lobe broadened apically, at apex bifurcated; parameres reduced to small, membranous structure located above foramen.</p> <p> <i>Female</i>. Similar to male in external morphology; antenna slightly shorter; metafemur lacking modification; each compound eye composed of approximately 23 ommatidia; humeral prominence small, indistinct; metathoracic wings absent. Measurements (as for male): body length 1.72–1.81 mm; length/width of head 0.36–0.37/ 0.39–0.40 mm, pronotum 0.40–0.42/ 0.40 mm, elytra 0.50/ 0.64 mm; abdomen 0.50–0.52/ 0.59–0.60 mm; length of antenna 0.91–0.93 mm; maximum width of genital complex (Fig. 1I) 0.22 mm, genital plate slightly narrower than sternite 9, lateral arms narrowing distally.</p> <p> <b>Comparative notes.</b> This species is morphologically most similar to the type species of <i>Physomerinus</i> Jeannel, <i>P. septemfoveolatus</i> (Schaufuss, L. W.) distributed in Vietnam and Thailand, by the greatly swollen male metafemora. They may be separated by the different shapes of the male femoral modification and the aedeagus. The metafemora of <i>P. septemfoveolatus</i> appear to have only one projection on the dorsal margin, and the surface declines distally following the projection. For the aedeagus of <i>P</i>. <i>septemfoveolatus</i> see Jeannel 1952: fig. 42.</p> <p> <b>Biology.</b> Most individuals were collected under stones on the river bank, and a few were observed running around on sandy soil between grasses (Fig. 3).</p> <p> <b>Distribution.</b> Central China: Hubei.</p> <p> <b>Etymology.</b> The name <i>rîpârius</i> (- <i>a</i>, - <i>um</i>) is a Latin adjective, meaning, “that inhabits the banks of rivers”, “riparian”, referring to the habitat where the species was collected.</p> <p> <b>Remarks.</b> Without examining the aedeagus and lacking a closer look at the scapes, this species would be easily regarded as a member of <i>Physomerinus</i> due to the swollen male metafemora. This may be the reason why Jeannel (1952, 1958) created <i>Physomerinus</i> and removed other, unrelated species there when his generic concept of Pselaphinae was largely based on male features. The probable synonymy of <i>Physomerinus</i> with <i>Batrisiella</i> Raffray (pers. com. with S. Nomura, dated 2023-07-27), and placement of the other species of the genus will be dealt with separately.</p>Published as part of <i>Yin, Zi-Wei & Zeng, Ting-Kai, 2023, Two new riparian Pselaphinae from Hubei, Central China (Coleoptera: taphylinidae), pp. 317-324 in Zootaxa 5346 (3)</i> on pages 318-320, DOI: 10.11646/zootaxa.5346.3.5, <a href="http://zenodo.org/record/8390212">http://zenodo.org/record/8390212</a>
How do flooding regime and traits related to oxygen uptake and transport affect plant performance?
Full text linkCornelissen, J.H.C. [Promotor]Zeng, B. [Promotor]Bodegom, P.M. van [Copromotor
A New Method to Characterize the Structured Tessellation Surface
No full textTessellated structure surface has been widely used for engineering surface. However, comprehensive characterization method for tessellated structure surface does not exist. In this paper, a systematic method that based on lattice building combined with the spectral analysis for the characterization of tessellation surface is introduced. The basic procedure includes six steps: pre-processing the measured data; converting the filtered data to AACF domain; finding the peak and the translation vectors; building the lattice and classifying the lattice type; tessellation reconstruction and finally comparison. Experimental works verified the effectiveness of the proposed method
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