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Artistic Contact between Italy and Mongol Eurasia: State of the Field
Anne Dunlop 이화여자대학교 이화사학연구소 2018 梨花史學硏究 Vol.0 No.57
Until recently, there had been little study of the links between Italian art and Mongol Eurasia. This is now changing, as art historians have grown more interested in global art, and in artistic exchange and contact across cultures. This essay offers a short overview of this developing field. It first discusses the types of visual evidence available for study. It then gives a brief history of research. It ends with a single case study: a large wall painting in Siena by the local painter Ambrogio Lorenzetti. Since the year 2000, there have been several articles on this painting. It is thus a useful example of how research in this field is developing, and of the challenges of evidence and method that occur.
A Comparison of Different Approaches for Coefficient Alpha for Ordinal Data
최재화(Jaehwa Choi),Maggie Dunlop, Jinsong Chen, 김석우(Sukwoo Kim) 한국교육평가학회 2011 교육평가연구 Vol.24 No.2
이 연구의 목적은 서열자료의 크론바흐 알파계수에 대한 두 가지 추정방법, 즉 요인분석에 기초한 방법과 새롭게 제안된 다항 상관계수 행렬를 이용한 방법을 비교하는 것이다. 또한, 다항 상관계수 행렬방법에서 두 가지 베이지안 추정법 즉, 기대사후확률법과 최대사후확률법을 추가적으로 비교하였다. 이 연구에서는, 최대사후확률법을 이용한 다항상관계수 행렬을 이용한 방법이 다른 방법들에 비하여 추정치를 항상 추정할 수 있는 점과, 모수에 대한 추정치의 정확도가 높다는 점에 있어서 우월한 것으로 밝혀졌다. 연구방법으로는 몬테카를로 시뮬레이션 기법이 이용되었으며, MATLAB과 BayesPCC 프로그램이 사용되었다. This study aims to compare two different estimation methods of coefficient alpha with ordinal data, the factor loading based method and the proposed polychoric correlation matrix based method, under various conditions. Furthermore, for the polychoric correlation matrix based approach, this study also compares two Bayesian estimates, i.e., expected a posteriori (EAP) and maximum a posteriori (MAP) estimates, for the polychoric correlations. A Monte Carlo simulation is used for this comparison by a specialized program code in MATLAB and BayesPCC.
AzTEC half square degree survey of the SHADES fields – I. Maps, catalogues and source counts
Austermann, J. E.,Dunlop, J. S.,Perera, T. A.,Scott, K. S.,Wilson, G. W.,Aretxaga, I.,Hughes, D. H.,Almaini, O.,Chapin, E. L.,Chapman, S. C.,Cirasuolo, M.,Clements, D. L.,Coppin, K. E. K.,Dunne, L.,Dy Blackwell Publishing Ltd 2010 MONTHLY NOTICES- ROYAL ASTRONOMICAL SOCIETY Vol.401 No.1
<P>ABSTRACT</P><P>We present the first results from the largest deep extragalactic mm-wavelength survey undertaken to date. These results are derived from maps covering over 0.7 deg<SUP>2</SUP>, made at λ= 1.1 mm, using the AzTEC continuum camera mounted on the James Clerk Maxwell Telescope. The maps were made in the two fields originally targeted at λ= 850 μm with the Submillimetre Common-User Bolometer Array (SCUBA) in the SCUBA Half-Degree Extragalactic Survey (SHADES) project, namely the Lockman Hole East (mapped to a depth of 0.9–1.3 mJy rms) and the Subaru/<I>XMM–Newton</I> Deep Field (mapped to a depth of 1.0–1.7 mJy rms). The wealth of existing and forthcoming deep multifrequency data in these two fields will allow the bright mm source population revealed by these new wide-area 1.1 mm images to be explored in detail in subsequent papers. Here, we present the maps themselves, a catalogue of 114 high-significance submillimetre galaxy detections, and a thorough statistical analysis leading to the most robust determination to date of the 1.1 mm source number counts. These new maps, covering an area nearly three times greater than the SCUBA SHADES maps, currently provide the largest sample of cosmological volumes of the high-redshift Universe in the mm or sub-mm. Through careful comparison, we find that both the Cosmic Evolution Survey (COSMOS) and the Great Observatories Origins Deep Survey (GOODS) North fields, also imaged with AzTEC, contain an excess of mm sources over the new 1.1 mm source-count baseline established here. In particular, our new AzTEC/SHADES results indicate that very luminous high-redshift dust enshrouded starbursts (<I>S</I><SUB>1.1mm</SUB> > 3 mJy) are 25–50 per cent less common than would have been inferred from these smaller surveys, thus highlighting the potential roles of cosmic variance and clustering in such measurements. We compare number count predictions from recent models of the evolving mm/sub-mm source population to these sub-mm bright galaxy surveys, which provide important constraints for the ongoing refinement of semi-analytic and hydrodynamical models of galaxy formation, and find that all available models overpredict the number of bright submillimetre galaxies found in this survey.</P>
Avishai Ceder,Stephan Hassold,Christopher Dunlop,Iris Chen 서울시립대학교 도시과학연구원 2013 도시과학국제저널 Vol.17 No.2
This paper deals with the creation of bus timetables using different vehicle sizes. The need for the development of new bus timetables for public transport (PT) stems from the current reliability and efficiency problems that current bus services are facing. These issues arise from the fact that timetables are designed mainly with even headways; however, it is also possible to design timetables with even passenger loads on the vehicles at the maximum load points, but with uneven headways. This paper hopes to bridge the two strategies together through the use of the incorporation of a mixed fleet size, running in conjunction. The timetables were constructed using two key concepts; assigning capacity and shifting departure times. The methodology for the creation of timetables was applied to a real-life example from Auckland, New Zealand. The results of the timetable are promising, validating the methodology of the model. The new timetables lead to a reduction in both passenger waiting time (user perspective) and empty seat time (operator perspective), with only a marginal increase in passenger standee time. The implementation of a mixed fleet of different vehicle sizes shows to be a promising way for achieving both an even headway and an even loading.
Biculturalism, Cultural Diversity and Globalisation: Issues for Aotearoa New Zealand
David C. Thorns,Tagaloa Peggy Fairbairn-Dunlop,Rosemary Du Plessis 한국사회과학협의회 2010 Korean Social Science Journal Vol.37 No.1
Like many other nation states in Asia and the Pacific, Aotearoa/New Zealand confronts the challenges of increasing cultural diversity and its benefits. This paper argues that Te Tiriti O Waitangi/ The Treaty of Waitangi is central to understanding cultural diversity and the impacts of globalisation in Aotearoa/New Zealand. Attention to this founding document and its implications sets the scene for discussion of recent settlement trends. Presentations at a national workshop on cultural diversity are used to highlight the complexity of living in a multi-ethnic and multi-cultural society. The paper concludes with reflections on how people in Aotearoa/New Zealand are reworking understandings of national identity while recognising the special status of Māori as indigenous people, their shared Polynesian heritage with citizens of Pacific Island descent, and appreciating and maintaining the cultural traditions of an increasingly diverse population.
A PbS quantum-cube: conducting polymer composite for photovoltaic applications
A. A. R. Watt,P. Meredith,J. D. Riches,S. Atkinson,H. Rubinsztein-Dunlop 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
We have developed a new non-polar synthesis for lead sulde (PbS) ‘‘quantum-cubes’’ in the conjugated polymer poly-2-methoxy,5-(2-ethyl-hexyloxy-p-phenylenevinylene) MEH-PPV. The conducting polymer acts to template and control the quantum-cube growth. Transmission electron microscopy of the composites has shown a bimodal distribution of cube sizes between 5 and 15nm is produced with broad optical absorption from 300 to 650 nm. Photoluminescence suggests electronic coupling between thecubes and the conducting polymer matrix. The synthesis and initial characterization are presented in this paper.
The source counts of submillimetre galaxies detected at λ= 1.1 mm
Scott, K. S.,Wilson, G. W.,Aretxaga, I.,Austermann, J. E.,Chapin, E. L.,Dunlop, J. S.,Ezawa, H.,Halpern, M.,Hatsukade, B.,Hughes, D. H.,Kawabe, R.,Kim, S.,Kohno, K.,Lowenthal, J. D.,Montañ,a, A. Blackwell Publishing Ltd 2012 Monthly notices of the Royal Astronomical Society Vol.423 No.1
<P><B>ABSTRACT</B></P><P>The source counts of galaxies discovered at submillimetre and millimetre wavelengths provide important information on the evolution of infrared‐bright galaxies. We combine the data from six blank‐field surveys carried out at 1.1 mm with AzTEC, totalling 1.6 deg<SUP>2</SUP> in area with root‐mean‐square depths ranging from 0.4 to 1.7 mJy, and derive the strongest constraints to date on the 1.1 mm source counts at flux densities <I>S</I><SUB>1100</SUB>= 1–12 mJy. Using additional data from the AzTEC Cluster Environment Survey to extend the counts to <I>S</I><SUB>1100</SUB>∼ 20 mJy, we see tentative evidence for an enhancement relative to the exponential drop in the counts at <I>S</I><SUB>1100</SUB>∼ 13 mJy and a smooth connection to the bright source counts at >20 mJy measured by the South Pole Telescope; this excess may be due to strong‐lensing effects. We compare these counts to predictions from several semi‐analytical and phenomenological models and find that for most the agreement is quite good at flux densities ≳ 4 mJy; however, we find significant discrepancies (≳ 3σ) between the models and the observed 1.1‐mm counts at lower flux densities, and none of them is consistent with the observed turnover in the Euclidean‐normalized counts at <I>S</I><SUB>1100</SUB>≲ 2 mJy. Our new results therefore may require modifications to existing evolutionary models for low‐luminosity galaxies. Alternatively, the discrepancy between the measured counts at the faint end and predictions from phenomenological models could arise from limited knowledge of the spectral energy distributions of faint galaxies in the local Universe.</P>