12,188 research outputs found
Bu guan hei mao bai mao neng zhuo dao lao shu du shi hao mao! miao. miao. miao dui ji le
No full text下款: 《造反戰报》画刊 (1967.5); 文字: 不管黑猫白猫 能捉到老鼠都是好猫! 妙.妙.妙 对极了… …裝裱後高寬: 118 x 65 cm.Xia kuan : "Zao fan zhan bao" hua kan (1967.5); Wen zi : bu guan hei mao bai mao neng zhuo dao lao shu du shi hao mao! miao. miao. miao dui ji le… …Zhuang biao hou gao kuan : 118 x 65 cm
Using performance assessment in secondary school mathematics: an empirical study in a Singapore classroom
No full textThis article reports an exploratory study on using performance assessment in mathematics instruction in a high-performing secondary school in Singapore. An intact mathematics class participated in the study, and received chapter-based performance tasks as intervention during regular mathematics lessons for about one and a half school years. The performance tasks used included authentic and/or open-ended tasks. The students’ academic achievements and attitudes in mathematics were compared with a comparison class that did not receive the intervention. Both quantitative and qualitative data were collected, mainly through questionnaire surveys, performance task tests, conventional school exams, and interviews with students and teachers. The results suggest that the students receiving the intervention performed significantly better than their counterparts in solving conventional exam problems, and in general they also showed more positive changes in attitudes towards mathematics and mathematics learning. The students from the experimental class also expressed positive views about the benefits of using performance tasks in promoting their ability in higher order thinking, though no statistically significant difference was detected between the two classes of students in solving unconventional tasks before and after intervention. Overall, the results appear to support teachers’ using contextualised problems in real life situations and open-ended investigations in students’ learning of mathematic
Richardson, Barbauld, and the construction of an early modern fan club
No full textMPhilMuch has been written about the life and long works of the eighteenth century epistolary novelist, Samuel Richardson, but the prospect of his position as the first celebrity novelist – responsible for courting his own fame as well as initiating his own fan club – has largely been ignored. The body of manuscripts housed at the National Art Library in the Victoria and Albert Museum in London provides the modern scholar with evidence of the skeletal beginnings of an early fan club. This thesis aims to show how these manuscripts were turned into a saleable commodity by the publisher and entrepreneur Richard Phillips, while under the guiding hand of another, slightly later, literary celebrity, Anna Laetitia Barbauld. In order to restore Richardson’s reputation amongst a new nineteenth century audience, Barbauld was required to construct her own idea of him as an eighteenth century celebrity author, and in doing so the insecurities of a self-professed, apparently diffident man, are revealed. Barbauld’s capacious, but heavily edited selection of letters is analyzed in this thesis, providing ample evidence that Richardson’s correspondents were more than just eager letter writers. By using Barbauld’s biography of Richardson this thesis aims to show how she manipulates the genre of life writing in her construction of him.
This thesis offers an alternative reading of how the Richardson manuscripts are viewed, redefining them as not simply a collection of letters, but as a collective entity, deliberately selected and archived as evidence of an early modern fan club, and its celebrity managing director
"Han zai" Sichuan bu xia yu he miao du ku si
No full text珠江水利造反兵团.文字: 《旱灾》 四川不下雨 禾苗都枯死; 下款: 珠江水利造反兵团批判李井泉漫画 一九六七年三月.裝裱後高寬: 119 x 37 cm.Zhujiang shui li zao fan bing tuan.Wen zi : "Han zai" Sichuan bu xia yu he miao du ku si; Xia kuan : Zhujiang shui li zao fan bing tuan pi pan Li Jingquan man hua 1967 nian 3 yue.Zhuang biao hou gao kuan : 119 x 37 cm
Development of a rotor model for the numerical simulation of helicopter exterior flow-fields
No full textIncludes bibliographical references (leaves 84-85).A numerical methodology is developed to model the effect of a rotor on the surrounding flow-field. The model calculates the time-averaged aerodynamic forces exerted on the air by the fan blades within the blade-swept region, and permits the user to specify blade properties such as cross-sectional profile and orientation at a particular radial and azimuthal location. The calculated forces are included as source terms within the Reynolds-averaged Navier-Stokes equations for an incompressible fluid, which are solved by the commercial CFD solver, FLUENT. The effects of turbulence are incorporated through the use of Launder and Spalding's k-g turbulence model. This method is selected as being the most efficient use of the resources available, giving the economic advantages of a steady simulation, while allowing radial and azimuthal variations of rotor characteristics. In order to validate the accuracy of the numerical model for both aligned and non-aligned inflow conditions, results are compared with experimental data reported for an axial flow fan. Agreement between experimental and numerical results is excellent to good. Fan static pressure rise is closely predicted by the numerical solution, while fan power consumption and fan static efficiency are under and over-predicted respectively. This error may be attributed to frictional losses not accounted for in the numerical model. These include physical rotational instabilities, leading to increased mechanical losses, and tip effects due to the clearance between the fan blade tips and the fan casing. Trends are nevertheless consistently predicted by the numerical model for inflow angles up to 45°, and for the range of blade pitch settings used. The adverse effect of off-axis inflow on the fan static pressure rise is numerically predicted, while fan power consumption is found to remain independent of inflow angle, as had been experimentally observed. The rotor model is finally integrated with the fuselage of the CIRSTEL (Combined Infra-Red Suppression and Tail rotor Elimination) prototype in an analysis of the helicopter exterior flow-field. No experimental data for this configuration was available for validation purposes. However, the model is used in the simulation of several common helicopter flight conditions. Results are presented graphically, and generally indicate good agreement with physically observed phenomena
Textbook research in mathematics education: development status and directions
No full textThis paper presents a survey study aiming to systematically examine, analyse and review relevant research focusing on mathematics textbooks and hence identify future directions in this field of research. The literature surveyed is selected from different data sources, including mainly journal articles, research theses and conference proceedings. The survey revealed that important progress has been made over the last few decades in mathematics textbook research, though the major achievement has been concentrated in the areas of textbook analysis (including textbook comparison), and the use of textbooks in teaching and learning. It is overall no longer true that the textbook research in mathematics is “scattered, inconclusive, and often trivial” as described six decades ago; however, the development of research on mathematics textbooks has been unbalanced in different areas. Following the review and discussion, the paper proposes five needed directions for advancing the research in this field
sj-docx-1-ijpp-10.1177_19401612221086905 - Supplemental material for The Effects of Flagging Propaganda Sources on News Sharing: Quasi-Experimental Evidence from Twitter
No full textSupplemental material, sj-docx-1-ijpp-10.1177_19401612221086905 for The Effects of Flagging Propaganda Sources on News Sharing: Quasi-Experimental Evidence from Twitter by Fan Liang, Qinfeng Zhu and Gabriel Miao Li in The International Journal of Press/Politics</p
Uronema orientalis Pan & Huang & Fan & Ma & Al-Rasheid & Miao & Gao 2015, spec. nov.
No full text<i>Uronema orientalis</i> spec. nov. (Fig. 4; Table 1) <p> <b>Diagnosis:</b> <i>In vivo</i> about 40–55 × 20–30 μm with a truncated apical plate; buccal field about 50% of body length; consistently twenty somatic kineties; membranelle 1 (M1) one-rowed, divided into two parts: the anterior part (M1a) and the posterior part (M1b), comprising four and three basal bodies, respectively; contractile vacuole caudally positioned near ventral margin; contractile vacuole pore (CVP) positioned at end of the second somatic kinety; marine habitat.</p> <p> <b>Type locality:</b> A beach near Sculpture Garden (36°4′N; 120°29′E), Qingdao, China.</p> <p> <b>Type slides:</b> The holotype slide (registration number: PXM-2012041301) and one paratype slide (registration number: NHMUK 2013.8.15.2) with protargol stained-specimens are deposited in the Laboratory of Protozoology, OUC and the Natural History Museum, London, respectively.</p> <p> <b>Dedication and etymology:</b> The species receives its name ‘ <i>orientalis</i> ’ from the locality where it was isolated.</p> <p> <b>Description:</b> Size <i>in vivo</i> about 40–55 × 20–30 μm, elongate-elliptical in outline (Figs 4A, E). An- terior end flat, with an apical plate, dorsal posterior area broadly rounded (Figs 4A, E). Buccal field about 50% of body length (Fig. 4A). Pellicle smooth, with- out ridges (Figs 4E–G). Extrusomes bar-shaped, about 4 μm long, and sparsely arranged beneath pellicle. Cytoplasm colourless to grayish, containing several to many large (ca 5 μm across) food vacuoles and dumb- bell-shaped crystals, which are usually 4 μm long (Figs 4A, I, J). Single macronucleus oval to spherical, centrally located (Fig. 4C). Contractile vacuole moderately large, 5 μm in diameter, caudally positioned (Figs 4A, J). Somatic cilia about 10 μm long, densely arranged; single caudal cilium approximately 20 μm long (Figs 4G, H). Swimming moderately fast while rotating about main body axis, sometimes crawling on debris, or resting on the bottom.</p> <p>Consistently twenty somatic kineties arranged longitudinally, which usually have monokinetids in the entire length of each row (Figs 4B, C, K). Buccal apparatus as shown in Figs 4D, K: M1 one-rowed, divided into two parts: the anterior part (M1a) and the posterior part (M1b) comprising four and three basal bodies, respectively. M2 composed of two longitudinal rows of basal bodies; M3 comprising three longitudinal rows (Figs 4D, K). Paroral membrane on right of buccal cavity terminating halfway along M2 (Figs 4D, K). Scutica consisting of four pairs of basal bodies (Figs 4D, K). Contractile vacuole pore positioned at the end of second somatic kinety (Fig. 4L).</p> <p> <b>SSU rRNA gene sequence:</b> The SSU rRNA gene sequence of <i>Uronema orientalis</i> spec. nov. has been deposited in the GenBank database with the accession number, length and G+C content as follows: KF840517, 1657 bp, 42.37%.</p> <p> <b>Remarks and comparison:</b> Considering the morphology, infraciliature and habitat, three species have similarities with our new species: <i>Uronema marinum</i> Dujardin, 1841, <i>U. elegans</i> Maupas, 1883 and <i>U. heteromarinum</i> Pan <i>et al</i>., 2010.</p> <p> Though <i>Uronema marinum</i> is similar to <i>U. orientalis</i> in body shape and the conspicuous extrusomes, it can be distinguished by the patterns of M1 (one row with 3–6 basal bodies in <i>U. marinum</i> vs. divided into two parts and comprising four and three basal bodies, respectively in <i>U. orientalis</i>), the number of somatic kineties (12–14 vs. 20 in <i>U. orientalis</i>), and the location of the contractile vacuole pore (at posterior end of kinety 2 in <i>U. marinum</i> vs. at posterior end of kinety 1 in <i>U. orientalis</i>) (Pan <i>et al</i>. 2010).</p> <p> Compared with <i>Uronema orientalis</i>, <i>U. elegans</i> is distinguished by the ratio of body length to width (1.5: 1 vs. 2.5: 1 in <i>U. orientalis</i>) and more somatic kineties (23–26 vs. 20) (Song <i>et al</i>. 2002).</p> <p> <i>Uronema heteromarinum</i> differs from <i>U. orientalis</i> in having reticulate ridges on a notched pellicle and fewer somatic kineties (15–16 vs. 20 in <i>U. orientalis</i>) (Pan <i>et al</i>. 2010).</p>Published as part of <i>Pan, Xuming, Huang, Jie, Fan, Xinpeng, Ma, Honggang, Al-Rasheid, Khaled A. S., Miao, Miao & Gao, Feng, 2015, Morphology and Phylogeny of Four Marine Scuticociliates (Protista, Ciliophora), with Descriptions of Two New Species: Pleuronema elegans spec. nov. and Uronema orientalis spec. nov., pp. 31-43 in Acta Protozoologica 54 (1)</i> on pages 38-40, DOI: 10.4467/16890027AP.15.003.2190, <a href="http://zenodo.org/record/8356852">http://zenodo.org/record/8356852</a>
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