198,596 research outputs found
Patient perfectionism and clinician impression formation during an initial interview
No full textHewitt, P. L., Chen, C., Smith, M. M., Zhang, L. C., Habke, M. A., Flett, G. L., & Mikail, S.F. (in press). Patient perfectionism and clinician impression formation during an initial interview. Psychology and Psychotherapy: Theory, Research and Practice
Corrigendum to “General reduced vehicle model for simulating truck-bridge pier collisions” [Dev. Built. Environ. 16 (2023) 100233] (Developments in the Built Environment (2023) 16, (S2666165923001151), (10.1016/j.dibe.2023.100233))
No full textThe authors regret there were two errors in the authors' affiliation in the published article. First, the affiliation of the first author (Daogang Ou) should only be the School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China. Second, the corresponding author (Lin Chen) should have two affiliations; the first one should be: School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China; and the second one should be: Key Laboratory of Building Safety and Energy Efficiency of Ministry of Education, Hunan University, Changsha, 410082, China. The authors would like to apologise for any inconvenience caused
Structure characterization and tribological study of magnetron sputtered nanocomposite nc-TiAlV(N, C)/a-C coatings
Full text linkGrown by reactive unbalanced magnetron sputtering in a mixed N2 and CH4 gaseous medium, heterogeneous nanocomposite coatings in the Ti-Al-V-N-C system show extraordinarily excellent tribological performance of coated machining tools. Using analytical high resolution TEM, EELS, FEG-SEM, XRD, and Raman spectroscopy, this paper reports detailed structural and chemical characterization of the coatings grown at various CH4: N2 ratios. Meanwhile, the mechanical and tribological properties were also measured, including hardness, Young’s modulus, residual stress and the dry-sliding friction and wear at varying environmental humidity. When CH4 gas was introduced in the deposition, the structure of the coatings has been found to experience a change from nano-scale TiAlN-VN multilayer architecture to a complex mixture of columnar grains of nc-TiAlV(N,C)/a-C nanocomposites and inter-column network of sp2-type amorphous carbon. Carbon incorporation and segregation also shows remarkable influence on the columnar growth model by leading to finer grain size. As compared to the carbon-free nitride coating, the nanocomposite coatings showed substantially reduced residual stress owing to the free-carbon precipitation, whereas the coatings maintained comparable hardness to the carbon-free TiAlN/VN. Their tribological properties were found to be strongly dependent on the environment. In humid air at RH > 30%, the coatings showed low friction coefficient less than 0.4 and extremely low wear rate at a scale of ~10-17 m3N-1m-1
Cobitis oxycephala Chen YX & Chen YF 2018, sp. nov.
No full textCobitis oxycephala Chen YX & Chen YF, sp. nov. (Figs 2–7) Cobitis sinensis Chen, 1986 (nec. Sauvage & Dabry, 1874): 145 (Hainan, fig. 81). Cobitis taenia dolichorhynchus Nichols & Popo, 1927 (nec. Nichols, 1918): 335 (Hainan, fig. 8); Nichols, 1943: 197 (Fukien, Kwangtung, Hainan, fig. 81). Holotype. ♂, IHB 0509273, 67.7 mm TL, 57.9 mm SL, China, Hainan, Ding’an County (19°68′N, 110°36′E; elev. 65 m), the Nandujiang River, July 2005, leg. Kun Li. Paratypes. IHB 0509392–9, 0509401–5, 13♂, 63.1–70.3 mm TL, 51.8– 59.1 mm SL, IHB 509400, 0509406–7, 3♀, 74.6–84.7 mm TL, 61.6–71.6 mm SL, same data as holotype. Diagnosis. The new species can be distinguished from its congeners by possessing the following combination of characteristics: 13–15 large rectangular blotches on L 1; 10–14 elongated blotches on L 5; snout sharp (Figs 2–3); males with a semicircular lamina circularis at the base of the first branched pectoral fin ray (Fig. 4); mental lobes undeveloped, three superficial longitudinal lobes short and bluntly rounded (Fig. 5); suborbital spine thick and curved, with a short processus medio-caudalis (Fig. 6). Cobitis oxycephala Chen YX & Chen YF, sp. nov. is similar to C. sinensis, C. dolichorhynchus and C. zhejiangensis in color pattern (with L 1 –L 5 line on the body) and lamina circularis morphology (plate-like), but differs from them in having snout sharp (vs. rounded); 10–14 horizontally elongated blotches and without the deeper faint dusky band on L 5 (vs. 11–12 rectangular and vertically elongate spots in C. sinensis (Son & Kim, 2002); a row of more or less oval blotches and with the deeper faint dusky band on the mid-lateral line in C. dolichorhynchus (Nichols, 1918); 14–16 short vertical spots in C. zhejiangensis). It further differs from C. dolichorhynchus and C. zhejiangensis in body slender, depth 7.6 in SL in male and 7.7 in female (vs. sturdy, depth 5.8 in SL in male in C. dolichorhynchus (Nichols, 1918); 5.6–6.7 (mean 6.0) in males and 4.3–5.0 (mean 4.7) in females in C. zhejiangensis); 13–15 large rectangular blotches on L 1 (vs. irregular dark cross blotches in C. dolichorhynchus (Nichols, 1918); 13–19 rectangular blotches in C. zhejiangensis). Description (Figs 2–7, Table 2). D. III–7; A. III–5; V. I–6; P. I–6–7; C. IV–14–16–IV. Body moderately slender, compressed. Head small. Snout sharp. Eyes located on upper part and middle of head. Preorbital part of head equal to or longer than postorbital part of head. Mouth small, inferior, with three pairs of short barbels. Length of maxillo-mandibular barbels shorter than diameter of eye. Mental lobes undeveloped, three superficial longitudinal lobes short and bluntly rounded (Fig. 5) Suborbital spine thick and curved, with a short processus medio-caudalis. Processus latero-caudalis long, less than one-third of processus medio-caudalis (Fig. 6). Subdorsal scales small, oval, with a moderately large focal area, 18–20 radial grooves, and 3–5 supplementary ones (Fig. 7). Dorsal fin moderately long, inserted midway between nostril and base of caudal fin. In males, pectoral fins long, second pectoral fin ray longest (Fig. 2). In females, pectoral fins slightly short, third pectoral fin ray longest (Fig. 3). Ventral fins small and short, approximately at same level as second or third branched dorsal-fin ray. Anal fin short, located on half of space between ventral and caudal fins. Anal orifice close to anal fin. Caudal fin long, emarginated tip. Caudal peduncle with ventral adipose crest. Lateral line long, not exceeding length of pectoral fins in males, and exceeding in females. Pigmentation pattern. Color characterized by pigmentation pattern with five longitudinal lines of dark speckles on dorsolateral sides of body (L 1 –L 5 from dorsal to ventral) (Figs 2–3). Color pattern characteristic of sexual dimorphism not observed. Head sprinkled with many black dots, and a black stripe extended from insertion of rostral barbels through eye to occiput. L 1 consisted of a row of 5–6 large rectangular blotches before dorsal fin; 2 on dorsal fin and 6–7 behind dorsal fin. Gap of rectangular blotches smaller than width of blotches. L 2 composed of a line of irregularly small and solitary spots or blotches and not intermingle with gap of large rectangular blotches, and reaching beyond dorsal fin. L 3 composed a narrow stripe beyond anal fin and a row of rounded blotches behind anal fin. L 4 composed of a line of minute black dots, which fused to a line and diminished towards end of ventral fin. L 5 consisted of a row of 10–14 horizontally elongated blotches, without deeper faint dusky band. One small oblique vertical jet blotch at upper base of caudal fin base and far smaller than eye diameter. 4–5 narrow rows of dark dots on dorsal and caudal fins. Sexual dimorphism. Males smaller than females with proportionally longer pectoral fins. In males, second pectoral fin ray thickened and elongated, a semicircular lamina circularis at base of first branched pectoral fin ray. In females, third pectoral fin ray elongated. Distribution. This new species occurs in the Nandujiang River, Hainan, China (Fig. 1). Etymology. The species name is derived from the Greek oxys, meaning sharp, and kephale meaning head, in reference to the pointed head of the species.Published as part of Chen, Yongxia, Chen, Hao, He, Dekui & Chen, Yifeng, 2018, Two new species of the genus Cobitis (Cypriniformes: Cobitidae) from South China, pp. 156-168 in Zoological Systematics 43 (2) on pages 160-162, DOI: 10.11865/zs.201814, http://zenodo.org/record/461768
Metal-Free Transfer Hydroiodination of C–C Multiple Bonds
No full textThe design and a gram-scale synthesis
of a bench-stable cyclohexa-1,4-diene-based
surrogate of gaseous hydrogen iodide are described. By initiation
with a moderately strong Brønsted acid, hydrogen iodide is transferred
from the surrogate onto C–C multiple bonds such as alkynes
and allenes without the involvement of free hydrogen iodide. The surrogate
fragments into toluene and ethylene, easy-to-remove volatile waste.
This hydroiodination reaction avoids precarious handling of hydrogen
iodide or hydroiodic acid. By this, a broad range of previously unknown
or difficult-to-prepare vinyl iodides can be accessed in stereocontrolled
fashion
Blind joint maximum likelihood channel estimation and data detection for SIMO systems
No full textA blind adaptive scheme is proposed for joint maximum likelihood (ML) channel estimation and data detection of single-input multiple-output (SIMO) systems. The joint ML optimisation over channel and data is decomposed into an iterative optimisation loop. An efficient global optimisation algorithm called the repeated weighted boosting search is employed at the upper level to optimally identify the unknown SIMO channel model, and the Viterbi algorithm is used at the lower level to produce the maximum likelihood sequence estimation of the unknown data sequence. A simulation example is used to demonstrate the effectiveness of this joint ML optimisation scheme for blind adaptive SIMO systems
Cobitis gracilis Chen & Chen 2016, sp. nov.
No full textCobitis gracilis sp. nov. (Figs 3–12) * Retrieved from GenBank. Holotype. ♂, HU 1600062, 74.4 mm TL, 64.2 mm SL, the Yalu River, Linjiang (41°81′N, 126°92′E), Jilin, China, October 2015, collected from the Linjiang farm product market by Yongxia Chen. Paratypes. HU 1505136, 1600037, 1600056, 3♀, 75.2–88.4 mm TL, 65.0– 78.4 mm SL, same data as holotype; HU 1506359, 1506347, 1506354, 3♀, 81.5–86.4 mm TL, 71.0– 74.3 mm SL, the Ussuri River, Raohe (46°80′N, 134°02′E), Heilongjiang, China, October 2015, collected from the Raohe farm product market by Yongxia Chen. Diagnosis. The new species is most similar to C. granoei and C. melanoleuca, but distinguished from C. granoei and C. melanoleuca in the upper jet black spot at the base of caudal fin inconspicuous or absent (Figs 3–4, 9–10) (vs. jet black spot conspicuous in C. melanoleuca (Figs 19–20) and C. granoei (Figs 13–14)); suborbital spine is slender and straight, with long processus latero-caudalis, less than one-second of the processus medio-caudalis (Fig. 7) (vs. suborbital spine thick and straight with short processus latero-caudalis in C. melanoleuca (Fig. 23); suborbital spine slender and curved with long processus latero-caudalis in C. granoei (Fig. 17)); males with a small meniscus lamina circularis at the base of the first branched pectoral fin ray (Fig. 5) (vs. an knife lamina circularis in C. melanoleuca (Fig. 21); a larger semilunar lamina circularis in C. granoei (Fig. 15)); 15–20 blotches on L 5 (vs. 10–16 blotches on L 5 in C. melanoleuca; 11–16 large blotches on L 5 in C. granoei). Description. General appearance and morphometic data of holotype and paratypes are given in Figs 3–12 and Table 2, respectively. D. III–7; A. III–5; V. I–6; P. I–7–8; C. IV–14–16–IV. Body slender, depth 8.7 in SL in males and 8.9–11.1 (mean 9.8) in females. Head small, with a length of 5.3 in SL in males and 5.2–5.6 (mean 5.5) in females. Snout rounded. Preorbital part of head shorter than postorbital part of head. Mouth small, with three pairs of short barbels. Length of maxillo-mandibular barbels shorter than diameter of eye. Maxillary barbels not reach under anterior border of eye. Mental lobes undeveloped, two superficial longitudinal lobes short, and lower tip bluntly rounded (Fig. 6). Suborbital spine slender and straight, with long processus latero-caudalis, less than one-second of processus medio-caudalis (Fig. 7). Subdorsal scales small and oval, with a large focal area, 19–22 radial grooves, and 3–5 supplementary ones (Fig. 8). Dorsal fin inserted midway between posterior nasal and base of caudal fin. Length of predorsal 1.9 in SL in males and 1.8–1.9 (mean 1.8) in females. In males, pectoral fins longer than those in females; first branched pectoral fin ray longest. Length of first branched pectoral fin ray 7.1 in SL. In females, second branched pectoral fin ray longest with length of second branched pectoral fin ray 8.6–11.0 (mean 9.8) in SL. Ventral fins approximately at same level as dorsal fin. Anal fin located in far behind dorsal extremity and not reach caudal fin. Anal orifice close to anal fin. Caudal fin emarginated tip. Pigmentation pattern. Body color whitish with a variable dark brown pigmentation pattern organized in L 1 –L 5 (Figs 3–4, 9–12). Color patterns characteristic of sexual dimorphism not obvious. L 1 consisted of a row of 7–9 rectangular blotches before dorsal fin that became less regular behind head; 2 on dorsal fin and 7–10 behind dorsal fin. Gap of rectangular blotches narrower than width of blotches. L 2 comprised a line of irregularly small dots that not intermingle with gap of L 1, and diminished towards end of caudal fin. L 3 comprised a row of horizontally elongated or rounded spots and that decreased beyond anal fin. L 4 spotted with one line of dots and that diminished towards end of caudal fin. L 5 comprised 15–20 oval blotches that together formed an irregular small blotch near head and caudal fin. At base of caudal fin, one inconspicuous jet-black spot found in upper region. In a few individuals, spot absent. Five or six striations on dorsal and caudal fins. Head sprinkled with many black spots on dorsal side, and a black stripe extended from occiput through eye to insertion of rostral barbels. Sexual dimorphism. Males smaller than females with proportionally longer pectoral, ventral, and anal fins. In males, first branched pectoral-fin ray thickened and elongated, with a small meniscus lamina circularis at base (Fig. 5). In females, second branched pectoral fin ray elongated. Distribution. This new species occurs in the Yalu and Heilongjiang rivers in Jilin and Heilongjiang Provinces in northeast of China (Figs 1–2). Etymology. The specific name derives from the Latin gracilis, meaning slender, in reference to the slender body.Published as part of Chen, Yongxia & Chen, Yifeng, 2016, A new species of the genus Cobitis (Cypriniformes: Cobitidae) from the Northeast China, pp. 379-391 in Zoological Systematics 41 (4) on pages 381-385, DOI: 10.11865/zs.201643, http://zenodo.org/record/461761
Anticipation of somatosensory and motor events increases centro-parietal functional coupling: an EEG coherence study
No full textObjective: Does functional coupling of centro-parietal EEG rhythms selectively increase during the anticipation of sensorimotor events composed by somatosensory stimulation and visuomotor task? Methods: EEG data were recorded in (1) 'simultaneous' condition in which the subjects waited for somatosensory stimulation at left hand concomitant with a Go (or NoGo) visual stimulus triggering (50%) right hand movements and in (2) 'sequential' condition where the somatosensory stimulation was followed (+ 1.5 s) by a visuomotor Go/NoGo task. Centro-parietal functional coupling was modeled by spectral coherence. Spectral coherence was computed from Laplacian-transformed EEG data at delta-theta (2-7 Hz), alpha (8-14 Hz), beta 1 (15-21 Hz), beta 2 (22-33 Hz), and gamma (34-45 Hz) rhythms. Results: Before 'simultaneous' sensorimotor events, centro-parietal coherence regions increased in both hemispheres and at all rhythms. In the 'sequential' condition, right centro-parietal coherence increased before somatosensory event (left hand), whereas left centro-parietal coherence increased before subsequent Go/NoGo event (right hand). Conclusions: Anticipation of somatosensory and visuomotor events enhances contralateral centro-parietal coupling of slow and fast EEG rhythms. Significance: Predictable somatosensory and visuomotor events are anticipated not only by synchronization of cortical pyramidal neurons generating EEG power in parietal and primary sensorimotor cortical areas (Babiloni C, Brancucci A, Capotosto P, Arendt-Nielsen L, Chen ACN, Rossini PM. Expectancy of pain is influenced by motor preparation: a high-resolution EEG study of cortical alpha rhythms. Behav. Neurosci. 2005a; 119(2):503-511; Babiloni C, Brancucci A, Pizzella V, Romani G.L, Tecchio F, Torquati K, Zappasodi F, Arendt-Nielsen L, Chen ACN, Rossini PM. Contingent negative variation in the parasylvian cortex increases during expectancy of painful sensorimotor events: a magneto-encephalographic study. Behav. Neurosci. 2005b; 119(2):491-502) but also by functional coordination of these areas. (c) 2006 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved
A Rosary of Rubies: The Chronicle of the Gur-rigs mDo-chen Tradition from South-Western Tibet
Full text linkThe mDo-chen bKa’-brgyud-pa school represents a little known Buddhist tradition from Mang-yul Gung-thang in south-western Tibet. It goes back to a Buddhist yogin known as Ma-bdun-pa or Ma-bdun ras-chen (12th/13th c.) and was later mainly spread by members of the Gur family. Although belonging to the “Upper ’Brug” (stod ’brug) branch of the ’Brug-pa bKa’-brgyud-pa school, the mDo-chen tradition has always been deeply infused with the “spoken teachings” (bka’ ma) and “treasure teachings” (gter ma) of the rNying-ma-pa school, and the cult of the “Seven Ma-mo Sisters” (ma mo mched bdun) was particularly practised and transmitted by its members. This book presents a critical edition, an annotated translation and a photographic reproduction of a manuscript copy of a rare chronicle of the Gur-rigs mDo-chen tradition written by Brag-dkar rta-so sPrul-sku Chos-kyi dbang-phyug (1775–1837). The text provides us with an overview of the tradition’s development mainly through biographical accounts but also through prophecies, prayers and praises for individual masters. The study concludes with two appendices based on the mDo chen bka’ brgyud gser ’phreng, a lineage history composed in the 15th century, and the “records of teachings received” (thob yig) of three important members of the Gur family, thus allowing us to gain an insight into the transmissions of the mDo-chen bKa’-brgyud-pa school and the interactions of its representatives with other important Buddhist teachers up to the 18th century. The present work is a further outcome of the author’s investigations into the cultural and religious traditions of south-western Tibet and the neighbouring Himalayan valleys
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