33,774 research outputs found
A 20-year database of MCSs in eastern China
No full textThis dataset contains the mesoscale convective systems (MCSs) over eastern China (20-42N, 95-125E) during the eight monsoon stages from 2001 to 2020.
The zipped data are in netCDF format, each contains the brightness temperature (lon, lat, time) of an MCS event. Note that
The time attribute shows "minutes since 2001-01-01 00:00"
The lon, lat attributes are in degrees at the 4-km resolution
For inquiries or potential collaborations, feel free to contact Dr. Tat Fan Cheng ([email protected]) or Prof. Mengqian Lu ([email protected]).
If you find our dataset/analyses useful, please cite our recent paper (Thank you!).
Cheng, T. F., Dong, Q., Dai, L., & Lu, M.* (2022). A Dual Regime of Mesoscale Convective Systems in the East Asian Monsoon Annual Cycle. Journal of Geophysical Research: Atmospheres, 127, e2022JD036523. https://doi.org/10.1029/2022JD03652
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
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
Commercialization or moralization in fandom?: Understanding the organizational dynamics and roles of Hong Kong fan clubs.
No full textCheng Wai Sum, Christine.Thesis (M.Phil.)--Chinese University of Hong Kong, 2004.Includes bibliographical references (leaves 133-135).Abstracts in English and Chinese.Chapter Chapter 1 --- Background --- p.1-5Chapter Chapter 2 --- Literature Review and Research Methods --- p.6-24Chapter Chapter 3 --- Framework for Data Analysis and Interpretation: A Commercialization-Moralization Continuum --- p.25-33Chapter Chapter 4 --- The Commercializing Role of a Fan Club: Joey Yung International Fan Club --- p.34-66Chapter Chapter 5 --- The Moralizing Role of a Fan Club: Hong Kong Teresa Teng Fan Club --- p.67-97Chapter Chapter 6 --- A Dual-purpose Fan Club: Andy World Club (AWC) Limited --- p.98-119Chapter Chapter 7 --- Discussion and Conclusion References --- p.120-13
fandycheng/ITCC-project: First release
No full text<p><strong>Description</strong>: This repository is for demonstrating the detection and tracking of the Intertropical Convective Cell (ITCC).</p>
<p><strong>Usage</strong>: For demonstration, please refer to <em><strong>ITCC_demo.m</strong></em>.</p>
<p><strong>Platform Requirement</strong>: The source codes were developed in Matlab (version 2019a or later).</p>
<p><strong>Citations</strong>: If you found this repository helpful, please cite the repository and our first journal article about the ITCC. Thank you!</p>
<p>Cheng, T. F., M. Lu, B. Wang, L. Dai (2023). A Fresh View of the Asian-Australian Monsoon Complexity: the Intertropical Convective Cell (ITCC) Framework. *Journal of Geophysical Research: Atmospheres*. (Under Review)</p>
<p><strong>Acknowledgments</strong>: Some of the source codes were sourced from the internet—for example, the "M_Map" Matlab package (https://www.eoas.ubc.ca/~rich/map.html).</p>
The Intertropical Convective Cell (ITCC): detection and tracking software
No full text<p><strong>Description</strong>: This repository is for demonstrating the detection and tracking of the Intertropical Convective Cell (ITCC).</p>
<p><strong>Usage</strong>: For demonstration, please refer to <em><strong>ITCC_demo.m</strong></em>. For the results of the ITCC tracking, load <em><strong>ITCC_attrs_ERA5_OLR.mat</strong></em> and <em><strong>ITCC_attrs_NOAA_CDR_OLR.mat</strong></em>.</p>
<p><strong>Platform Requirement</strong>: The source codes were developed in Matlab (version 2019a or later).</p>
<p><strong>Citations</strong>: If you found this repository helpful, please cite the repository and our journal article. Thank you!</p>
<p><span>Cheng, T. F.</span><span>, Lu, M., Wang, B., & Dai, L. (2024). A fresh view of the Asian-Australian monsoon complexity: The intertropical convective cell (ITCC) framework. <em>Journal of Geophysical Research: Atmospheres</em>, 129, e2023JD039498. <a href="https://doi.org/10.1029/2023JD039498">https://doi.org/10.1029/2023JD039498</a> </span></p>
FIGURE 3. Cotylidia fibrae. a–b in Cotylidia fibrae (Rickenellaceae, Hymenochaetales), a new species from China
No full textFIGURE 3. Cotylidia fibrae. a–b. Basidiomes; c. Basidiospores; d. Hymenial cystidia; e. Basidia. Scale bars: a–b: 10 mm; c: 1 μm; d: 10 μm; e: 5 μm. Photos: a–b by Jinzhong Cao. Drawings: c–e by Cheng Yang.Published as part of Yang, Cheng, Xu, Yu-Yan & Fan, Li, 2021, Cotylidia fibrae (Rickenellaceae, Hymenochaetales), a new species from China, pp. 139-148 in Phytotaxa 487 (2) on page 145, DOI: 10.11646/phytotaxa.487.2.4, http://zenodo.org/record/575668
Fan-shaped firing range of a single battlement gap.
No full textFan-shaped firing range of a single battlement gap.</p
Hybrid Cultural Codes in Non-Western Civil Society: Images of Women in Taiwan and Hong Kong
No full text- …
