2,317 research outputs found
A Profile of Fatherhood Among Young Men: Moving Away from Their Birth Family and Closer to Their Child.
No full textHave things changed all that much in terms of how fatherhood is conceptualized and exercised in daily life? That is the question underlying this article. The author compares the findings of a recent analysis on certain aspects of the lived experiences of young fathers (under 25 years of age) with the results of studies undertaken over the past ten years, and replies in the affirmative. First of all, when considering the representations held of fathers or mothers, most of these young fathers believe that their role is a multi-faceted one, and that it is often identical to that of their spouse. According to young fathers, fatherhood is a dual experience that requires them to be present on a daily basis while also casting their eye on the future. This is an experience that is constructed out of affectionate moments, child-care duties, education in the literal sense, and especially out of shared experiences with their spouse. In addition, they question the degree to which involvement in a career should take precedence over involvement in their child's life. In other words, the former 'competes' with their ability to be present in their child's daily life, which denotes a change from the attitudes of previous generations.Fatherhood, Young Fathers, Representation, Paternal Identity, Qualitative Research
The politics of fashion: perceptions of power in female clothing and ornamentation as reflected in the sixteenth-century Chinese novel Jin Ping Mei
No full textThis thesis examines issues of female power and influence in sixteenth-century China focusing on how women and their roles were perceived in the changing social environment of the mid-late Ming dynasty. Using aspects of a New Historicist approach, information from contemporary literary and historical sources are analysed alongside each other. With its emphasis on the lives of women and preoccupation with the description of material objects, the late Ming novel Jin Ping Mei forms an important element in the thesis. China in the sixteenth century saw expanding urbanisation, the emergence of a new wealthy merchant class, increasing visibility of women and a questioning of traditional morality. Fashion consciousness, as one of the most conspicuous aspects of the new material culture, is a possible indicator of these trends. Traditional Western theories contend that fashion began in the particular context of Renaissance Europe. However, this study argues that a similar fashion awareness existed in China too, and was manifested in a competitive striving for social status, in this case specifically among women. In contrast to previous studies which downplayed the impact women had on defining traditional Chinese culture, this thesis demonstrates how women and their sartorial choices began to redefine the boundaries of material culture, influencing literati discourse which, in turn, re- influenced female behaviour
A model system for studying the role of phosphoryl group in energy transfer system
No full textThe discovery of alkyl phosphonic acids in the Murchison meteorite suggests the possibility of delivery of these water soluble, phosphorus containing molecules by meteorites to the earl Earth. Phosphonic acids may have been precursors to the first nucleic acids ([1]). We propose the model of energy transfer system as the following steps: (1) alkyl hydrocarbon absorbed far UV energy. (2) R-P=O group accepted energy from excited alkanes. (3) The P-C bond in phosphonate may be broken to form phosphate and corresponding acid in the presence of oxygen.Astronomy & AstrophysicsCPCI-S(ISTP)
Modelling the magnetic activity and filtering radial velocity curves of young Suns : the weak-line T Tauri star LkCa 4
No full textSGG acknowledges support from the Science & Technology Facilities Council (STFC) via an Ernest Rutherford Fellowship [ST/J003255/1]. SHPA acknowledges financial support from CNPq, CAPES and Fapemig.We report results of a spectropolarimetric and photometric monitoring of the weak-line T Tauri star LkCa 4 within the Magnetic Topologies of Young Stars and the Survival of close-in giant Exoplanets (MaTYSSE) programme, involving ESPaDOnS at the Canada–France–Hawaii Telescope. Despite an age of only 2 Myr and a similarity with prototypical classical T Tauri stars, LkCa 4 shows no evidence for accretion and probes an interesting transition stage for star and planet formation. Large profile distortions and Zeeman signatures are detected in the unpolarized and circularly polarized lines of LkCa 4 using Least-Squares Deconvolution (LSD), indicating the presence of brightness inhomogeneities and magnetic fields at the surface of LkCa 4. Using tomographic imaging, we reconstruct brightness and magnetic maps of LkCa 4 from sets of unpolarized and circularly polarized LSD profiles. The large-scale field is strong and mainly axisymmetric, featuring a ≃2 kG poloidal component and a ≃1 kG toroidal component encircling the star at equatorial latitudes – the latter making LkCa 4 markedly different from classical T Tauri stars of similar mass and age. The brightness map includes a dark spot overlapping the magnetic pole and a bright region at mid-latitudes – providing a good match to the contemporaneous photometry. We also find that differential rotation at the surface of LkCa 4 is small, typically ≃5.5 times weaker than that of the Sun, and compatible with solid-body rotation. Using our tomographic modelling, we are able to filter out the activity jitter in the radial velocity curve of LkCa 4 (of full amplitude 4.3 km s−1) down to an rms precision of 0.055 km s−1. Looking for hot Jupiters around young Sun-like stars thus appears feasible, even though we find no evidence for such planets around LkCa 4.Peer reviewe
Ming Qing zhi ji Chongzhen yu qin ji xiang guan shi wen yan jiu =: A study of the poetry and prose on Emperor Chongzhen’s (r. 1628-1644) imperial lute during the Ming-Qing transition
No full textM.Phil.The death of Emperor Chongzhen was a major historical event at the Ming-Qing transition. On the nineteenth day of the third lunar month in 1644 (25th April, 1644), Zhu Youjian (r. 1628-1644), the last emperor of the Ming dynasty, strangled himself at Coal Hill. The event not only signifies the downfall of the Ming dynasty, it was incessantly recollected and commemorated by the Ming loyalists. More importantly, it was circulated and passed on in the form of a collective, public memory. Multifarious and abundant literary works were inspired, yet merely not investigated, including the poetry and prose using Emperor Chongzhen’s imperial lute as a core imagery. This thesis aims at revealing the importance of this specific historical memory of Chongzhen among Ming loyalists in early Qing literature.Encounters with “objects from the former dynasty” or “the person who remembers” constitute a common theme in the literature of remembrance during the early Qing. Chongzhen’s lute (Xiangfeng), place of death, ministers in the former palace like Yang, the chamberlain for ceremonials (Yang Zhengjing) appear repeatedly in the texts written by the Ming intellectuals. These people and objects carry with them the historical memory of going through the death of Chongzhen, so that the intellectuals from the South like Qu Dajun (1630-1696) attempted to find and revisit remnants of the former dynasty and the eunuch, receiving memories of the previous dynasty through indirect experience. Praises and songs of the “imperial lute” and of “Yang, the chamberlain for ceremonials playing the lute” among intellectuals from Jiangnan and Lingnan were attempts of recalling memories of the former dynasty through objects (imperial lute) and people who remember (lute player).This thesis examines how intellectuals held literary gatherings, witnessing or relating the Chongzhen’s mementoes and previous court music, and connecting to the memory of Ming’s collapse. They then wrote corresponding poems in shared themes and forms propagating the tales of Chongzhen among communities and inciting the collective memory and collective trauma of the Ming loyalists. Through collating different communities’ praises of the imperial objects and their dissemination from 1644 to 1694 during the Ming-Qing transition, we can see how social and literary ties had been affected by political change and how Ming loyalists interacted and condensed their memory of the former dynasty showing the recognition of their identity.甲申（1644）三月十九日，明思宗朱由檢自縊煤山。君殉社稷，亡國之象。此後，追憶崇禎之死的時間與場地成為明遺民紀念故國的重要方式衍生不少詩文創作。其中一組以崇禎御琴「翔鳳」為主題的文本尤為特殊。淮安、嶺南文士均有參與創作，並觸及一連串有關崇禎樂官楊太常之賦詠即與崇禎之死的歷史事件緊密聯繫。嶺南屈大均（翁山，16301696順治十五年1658）北遊拜謁崇禎帝死社稷所在，從故宮宦官得悉御琴下落，主動參與物主舉辦的遺民集會，與太常結交，並作〈御琴歌〉、〈御琴記〉。康熙元年1660）南歸大均復將崇禎御琴的話題帶到嶺南，引起南粵文士賦詩相和，開拓御琴文本的流動空間以及傳播維度。康熙三十年前後，嶺南諸子發現另一張御琴的遺蹤，乃鄺露（湛若16041650）所藏「綠綺臺」，引發另一番唱酬。此琴雖非崇禎御琴，乃明武宗朱厚照內府之器，大均將其納入「御琴」的論述之中，有意等同綠綺臺與翔鳳的價值與地位，深意藏焉。學界對明遺民之討論頗夥，然對崇禎之死的歷史事件及衍生的相關文學作品關注不足。有關崇禎御琴的詩文研究，更是寥寥。御琴作為前朝遺物，既是皇權的象徵，亦保存先帝手澤；由物及人，乃勾起遺民之故國記憶。楊太常於不同場合彈奏崇禎「賜琴」，孤臣孽子復從亡國之音回溯舊都風景，引發家國之思。本文即欲尋繹相關文本，鉤沈其中故實，以期展示其時南北志士的生存空間與討論話題，回應遺民結社酬唱的文化語境。復以大均之個人行動為另一主軸，觀察其遺民心境、志業重心之變化，揭示明亡入清五十年間其遺民心志之歸結，剖析、重構明遺民的身分認同。本文擇取「崇禎御琴」的相關詩文為研究對象，正文分為四章，擬先梳理清初文士「以詩存史」的書寫樣態、以音樂再現歷史的詩歌作法鉤稽崇禎雅好鼓琴之史料，呈現崇禎一朝改革樂制的政治意圖。進而處理淮水一帶淮安文士圈所詠「聽楊太常彈琴歌」的酬唱詩文，以王猷定（于一，15981662）原詩為中心衍生的相關和作，揭示順治年間明遺民的家國之思及生存境況。第三章乃聚焦大均所撰御琴詩文，闡釋御琴的意涵，對讀西園諸子的和作，連結嶺南文士的抗清記憶。末章討論綠綺琴及鄺露殉難事迹，拈出大均建構嶺南忠義傳統的嘗試，思考國家認同與地域文化之間的辯證關係。大均刻意將綠綺臺與御琴翔鳳並置，即欲將地方記憶上接國家記憶，呈現地方與中央、邊緣與中心、南與北共同譜寫的集體記憶。他通過定義「廣東」，最終獲得了自身的定位。羅惠丹."2020年2月".Parallel title from English abstract.Thesis M.Phil. Chinese University of Hong Kong 2020.Includes bibliographical references (leaves 89-105).Abstracts in Chinese and English.Title from PDF title page (viewed on February 8, 2022).Luo Huidan
PCNN toolbox used in image fusion
No full textThis toolbox contains Matlab files that implement the image fusion algorithms based on Pulse Coupled Neural Networks(PCNN).
You can download this code from http://quxiaobo.go.8866.org/project/PCNN/PCNN_toolbox.rar
or http://dspace.xmu.edu.cn
This code is copyright and is supplied free of charge for research
purposes only. In return for supplying the code, all I ask is that, if
you use the algorithms, you give due reference to this work in any
papers that you write. If the applications are good, I would be
very interested in collaboration. I accept no liability arising from use
of these algorithms.
QU Xiao-BO,
Xiamen University in P.R.China, Aug. 2008.
% ---------
% Author: Qu Xiao-Bo Aug.28,2008
% Postal address:
% Rom 509, Scientific Research Building # 2,Haiyun Campus, Xiamen University,Xiamen,Fujian, P. R. China, 361005
% Website: http://quxiaobo.go.8866.org
%=====================================
% References:
[1]Qu Xiao-Bo, YAN Jing-Wen, XIAO Hong-Zhi, ZHU Zi-Qian. Image Fusion Algorithm Based on Spatial Frequency-Motivated Pulse Coupled Neural Networks in Nonsubsampled Contourlet Transform Domain. Acta Automatica Sinica, Vol.34, No.12, pp: 1508-1514.Dec.2008.
[2]Xiao-Bo Qu,Jingwen Yan.Image Fusion Algorithm Based on Features Motivated Multi-channel Pulse Coupled Neural Networks, The 2nd International Conference on Bioinformatics and Biomedical Engineering-iCBBE2008，Shanghai, China, 16-18 May 2008, pp. 2103-2106
[3]Xiaobo Qu, Changwei Hu, Jingwen Yan, Image Fusion Algorithm Based On Orientation Information Motivated Pulse Coupled Neural Networks, The seventh World Congress on Intelligent Control and Automation-WCICA 2008，Chongqing, China,25-27 June 2008, pp.2437-2441
[4]Xiaobo Qu, Jingwen Yan, Ziqian Zhu, et al. Multi-focus image fusion algorithm based on regional firing characteristic of Pulse Coupled Neural Networks, Conference Pre-proceedings of The Second International Conference on Bio-Inspired Computing: Theories and Applications, pp:563-565,2007
[5]Yan Jingwen, QU Xiaobo. Beyond Wavelets and Its Applications [M].Beijing: National Defense Industry Press, June 2008.(In Chinese)
(Check http://quxiaobo.go.8866.org, http://quxiaobo.blog.edu.cn or http://naec.stu.edu.cn for these and
other related papers.)
%==================================
Toward Inclusive, Vital and Livable City Scenarios: The Transformation of Urban Villages in Shenzhen
No full textCurrently Shenzhen is experiencing industrial upgrading and city reprofiling, transforming from a world factory to a world city. It is a crucial moment to rethink the future of urban villages in the city, informal settlements that emerged extensively along with rapid industrialization and urban development in the past three decades, and played essential roles as “arrival cities” for migrants. This chapter investigates the formation process of urban villages as well as planning strategies for future development, from the perspective of urban form and governance. Urban vitality, livability, and inclusiveness are addressed as multidimensional urban values that could generate common interests among stakeholders, which therefore could be considered desirable and possible future scenarios for such neighborhoods in Shenzhen.Accepted Author ManuscriptSpatial Planning and Strateg
Experimental Study of the Melting and Reduction Behaviour of Ore Used in the HIsarna Process
No full textThe HIsarna is a coal-based smelting reduction process for ironmaking to drastically reduce CO2 emission and is one of the most promising alternative ironmaking processes under development in the world. The furnace consists of two inter-connected reactors: i) a smelting cyclone, ii) a smelting reduction vessel. The smelting cyclone is expected to provide about 20 % pre-reduction degree through thermal decomposition and reduction. However, as a new technology still at its development stage, the iron ore behaviour in the smelting cyclone is not well studied. Three HIsarna pilot plant campaigns have been conducted successfully during the years of 2011-2013 at the Tata Steel site in IJmuiden, the Netherlands. The laboratory study has been carried out in the same period at Delft University of Technology as part of the research programme of the Matrials innovation institute M2i, to focus on the thermal decomposition and reduction kinetics of individual particles in the smelting cyclone of the HIsarna, forming the main part of this thesis. In this study, a special experimental set-up has been designed and commissioned: the high temperature drop tube furnace (HTDF). The HTDF was used to investigate the reduction mechanism at high temperature of individual ore particles without agglomeration. The reaction gas is a mixture of CO, CO2, H2 and N2, and the composition is controlled with mass flow controllers. The gases are firstly guided into a gas mixing station and form a flow of gas mixture. And then the gas mixture is split up into two flows. A small flow of the gas mixture enters the syringe pump feeder as particle carrier gas. The other flow is preheated to 773 K through a pre-heat furnace before entering the electrically heated furnace. The particle feed rate is controlled by a syringe pump feeder. The individual iron ore particles from the syringe pump feeder pass through a water-cooled injection probe before entering the hot zone. The iron ore reduction takes place during the flying time of the particle in the hot zone. The off-gas and the partially reduced particles are received by a water-cooled sampling probe. Finally, the iron ore particles are collected by a sample collector. The study of the thermal decomposition behaviour of hematite ore started with a theoretical evaluation. The experimental study has been conducted with the TGA-DSC analyser and in a high temperature horizontal furnace at a steady state. The individual particle thermal decomposition behaviour has been investigated in the HDTF under different conditions. The theoretical evaluation shows that, in the inert gas environment, the lowest start thermal decomposition temperature of Fe2O3 could be room temperature when the partial pressure of oxygen is close to zero bar. The thermal decomposition of Fe2O3 can be accelerated when the temperature is higher than 1473 K. The thermal decomposition of pure Fe3O4 can also take place at room temperature when the partial pressure of oxygen is close to zero bar and the thermal decomposition can be accelerated when the temperature is higher than 1673 K. These results have been confirmed by the following experimental studies. From the TGA-DSC analysis, it was found that a sharp weight loss in a short time appears on the TG curve. However, the weight loss is quite small during the time elapsed after the sharp weight loss stage. The experimental study in the horizontal furnace provided accurate results of the thermal decomposition degree of hematite ore at different temperatures and holding times by chemical titration. The thermal decomposition degree of iron ore increases with the increase of temperature. At the same temperature, the thermal decomposition degree of iron ore increases slowly with the increase of holding time (1 h, 2 h and 3 h). In addition, no significant difference was observed between the results at 1673 K and 1773 K. Furthermore, whether the sharp weight loss stage occurs and how much of the thermal decomposition degree could be achieved in the smelting cyclone has been further tested with the HTDF. The effects of different inert gases: N2, Ar, CO2 (CO2 is the primary gas in the pilot plant besides CO), temperature, residence time, and particle size on the final thermal decomposition degree were studied. It was found that the sharp weight loss stage observed in the TGA-DSC experiments can be mostly achieved in the HTDF in the CO2 gas rather than N2 and Ar. For example, at 1750 K in CO2 gas, the thermal decomposition degree of iron ore in the HTDF is around 10.8 % which is slightly lower than the value of 12.6 % obtained in the horizontal furnace. This is because the fine iron ore particles could be heated up faster in CO2 gas than in N2 and Ar gas due to the strong radiation properties (emission and absorption) of CO2 gas. Temperature plays an important role in determining the iron ore thermal decomposition which dramatically goes up with the increase of temperature. However, there is no significant influence of particle size and residence time on the thermal decomposition degree observed, when the particle diameter is smaller than 250 µm. It indicates that the thermal decomposition of iron ore quickly takes place in the first 210 ms. Based on the results of thermal decomposition of iron ore particles, the individual particle reduction mechanism of hematite ore in the smelting cyclone has been investigated with the HTDF. Under the studied experimental conditions, the maximum reduction degree of iron ore particle is in the range of 23-30 %. Before reaching the reduction equilibrium state, the reduction degree of iron ore goes up with the increase of residence time and temperature, and decreases with the increase of Post Combustion Ratio (CO2 + H2O)/(CO + CO2 + H2+ H2O). The gas-solid particle reaction takes place in all the studied residence times at 1550 K and 1600 K, and at 1650 K in the residence times of 210-970 ms. The 100 % gas-molten particle reduction takes place at 1700 K in the residence times of 700-2020 ms and in all the studied residence times at 1750 K. The reduction degree of iron ore in the first 210 ms is the combined result of reduction and thermal decomposition. During the reduction process, quantities of micro pores were formed due to the different crystal structures of hematite, magnetite and w?stite. The micro pores could accelerate the reduction process. The reaction mechanism of iron ore reduction at high temperature has been revealed through the kinetic analysis. The kinetic model was determined by microscopic examination. The unreacted shrinking core model was applied to both gas-solid particle reaction and gas-molten particle reaction. The rate controlling step of gas-solid particle reduction was obtained by the model-fitting method and confirmed by the model-free method, and the rate controlling step of gas-molten particle reduction and mixed reduction was obtained by the model-fitting method. The reaction rate controlling step was found to be the chemical control for gas-solid particle reduction, mixed reduction and gas-molten particle reduction from a macrokinetics point of view. Through further study, the rate controlling step of gas-solid particle reduction was found to be mass transport of cations and electrons inside the matrix along the interfaces from a microkinetics point of view. The most typical operating conditions of the smelting cyclone of the HIsarna process have been studied in this study and the fundamental understanding of the reduction kinetics of the individual iron ore particle is presented in this thesis. At the same time, new questions about the reactions and the reactor systems have been raised like the reduction mechanism of bigger particle size, reduction behaviour of ‘particle swarms’, the particles’ collision behaviour and so on. The further laboratory study seems significant for future development of the HIsarna process.Materials Science & EngineeringMechanical, Maritime and Materials Engineerin
Matlab Image Fusion Toolbox for Sum-modified-Laplacian-based Multifocus Image Fusion Method in Cycle Spinning Sharp Frequency Localized Contourlet Transform
No full textThis toolbox contains Matlab files that implement the image fusion algorithms described in paper
QU Xiao-bo, YAN Jing-wen, YANG Gui-de. Sum-modified-Laplacian-based Multifocus Image Fusion Method in Sharp Frequency Localized Contourlet Transform Domain.Optics and Precision Engineering, 17(5): 1203-1202, June 2009. (in Chinese)
Chinese Version of this paper can be downloaded at
http://dspace.xmu.edu.cn/dspace/bitstream/2288/15999/1/SFLCT_SML_CS_Optics_and_Precision_Engineering_CN.pdf
English Version of this paper can be downloaded at
http://dspace.xmu.edu.cn/dspace/bitstream/2288/15999/2/SFLCT_SML_CS_Optics_and_Precision_Engineering_EN.pdf
(download Chinese version or English version)
If you use the code, please cite the paper as follows:
% References:
[1] QU Xiao-bo, YAN Jing-wen, YANG Gui-de. Sum-modified-Laplacian-based Multifocus Image Fusion Method in Sharp Frequency Localized Contourlet Transform Domain.Optics and Precision Engineering, 17(5): 1203-1202, June 2009. (in Chinese)
(Check http://quxiaobo.go.8866.org, http://quxiaobo.blog.edu.cn or http://naec.stu.edu.cn for these and
other related papers.)
QU Xiao-BO,
Xiamen University in P.R.China, April 2009.
Author: Qu Xiao-Bo Aug.28,2008
% Postal address:
% Rom 509, Scientific Research Building # 2,Haiyun Campus, Xiamen University,Xiamen,Fujian, P. R. China, 361005
% Website: http://quxiaobo.go.8866.org
%
You have to other toolbox required:
1. FusionEvalution toolbox at http://dspace.xmu.edu.cn/dspace/bitstream/2288/16979/1/FusionEvaluation.rar
2. Sharp Frequency Localized Contourlet Transform at http://lcavwww.epfl.ch/~lu/code/ContourletSD.zip
Acknowledgement
1. This code is copyright and is supplied free of charge for research
purposes only. In return for supplying the code, all I ask is that, if
you use the algorithms, you give due reference to this work in any
papers that you write. If the applications are good, I would be
very interested in collaboration. I accept no liability arising from use
of these algorithms.
2. Thanks Y. M. Lu for sharing his contourletSD code for our image fusion algorithm
Tunable Spin-Orbit Coupling via Strong Driving in Ultracold-Atom Systems
No full textIncludes supplemental materialSpin-orbit coupling is an essential ingredient in topological materials, conventional and quantum-gas-based alike. Engineered spin-orbit coupling in ultracold-atom systems - unique in their experimental control and measurement opportunities - provides a major opportunity to investigate and understand topological phenomena. Here we experimentally demonstrate and theoretically analyze a technique for controlling spin-orbit coupling in a two-component Bose-Einstein condensate using amplitude-modulated Raman coupling.Funding includes ARO (Grant No. W911NF-12-1-0334), AFOSR (Grant No. FA9550-13-1-0045), and NSF-PHY (Grant No. 1249293)
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