199 research outputs found
Wetting of real surfaces De Gruyter studies in mathematical physics ;, 19./ Edward Yu. Bormashenko.
No full textIn English.Includes bibliographical references and index.The revealing of the phenomenon of superhydrophobicity (the "lotus-effect") has stimulated an interest in wetting of real (rough and chemically heterogeneous) surfaces. In spite of the fact that wetting has been exposed to intensive research for more than 200 years, there still is a broad field open for theoretical and experimental research, including recently revealed superhydrophobic, superoleophobic and superhydrophilic surfaces, so-called liquid marbles, wetting transitions, etc. This book integrates all these aspects within a general framework of wetting of real surfaces, where physical and chemical heterogeneity is essential. Wetting of rough/heterogeneous surfaces is discussed through the use of the variational approach developed recently by the author. It allows natural and elegant grounding of main equations describing wetting of solid surfaces, i.e. Young, Wenzel and Cassie-Baxter equations. The problems of superhydrophobicity, wetting transitions and contact angle hysteresis are discussed in much detail, in view of novel models and new experimental data. The second edition surveys the last achievements in the field of wetting of real surfaces, including new chapters devoted to the wetting of lubricated and gradient surfaces and reactive wetting, which have seen the rapid progress in the last decade. Additional reading, surveying the progress across the entire field of wetting of real surfaces, is suggested to the reader. Contents What is surface tension? Wetting of ideal surfaces Contact angle hysteresis Dynamics of wetting Wetting of rough and chemically heterogeneous surfaces: the Wenzel and Cassie Models Superhydrophobicity, superhydrophilicity, and the rose petal effect Wetting transitions on rough surfaces Electrowetting and wetting in the presence of external fieldsNonstick droplets Wetting of lubricated surfaces.Frontmatter -- Preface to the second edition -- Preface to the first edition -- Symbol Index -- Contents -- 1. What is surface tension? -- 2. Wetting of ideal surfaces -- 3. Contact angle hysteresis -- 4. Dynamics of wetting -- 5. Wetting of rough and chemically heterogeneous surfaces: the Wenzel and Cassie Models -- 6. Superhydrophobicity, superhydrophilicity, and the rose petal effect -- 7. Wetting transitions on rough surfaces -- 8. Electrowetting and wetting in the presence of external fields -- 9. Nonstick droplets -- 10. Wetting of lubricated surfaces -- 11. Reactive wetting -- Index1 online resourc
Physics of wetting: phenomena and applications of fluids on surfaces De Gruyter graduate./ Edward Yu. Bormashenko.
No full textIn English.Includes bibliographical references and idnex.Motivated by a plethora of phenomena from nature, this textbook introduces into the physics of wetting of surfaces. After a brief discussion of the foundations of surface tension, its implementation for floating objects, capillary waves, bouncing droplets, walking of water striders, etc. is discussed. Furthermore, Marangoni flows, surface tension inspired instabilities, condensation and evaporation of droplets, liquid marbles, superhydrophobicity and superoleophobicity (lotus effect) are introduced. All relevant concepts are illustrated by the numerous qualitative and quantitative exercises. ContentsWhat is surface tension?Wetting of surfaces: the contact angleSurface tension-assisted floating of heavy and light objects and walking of water stridersCapillary interactions between particles. Particles placed on liquid surfaces. Elasticity of liquid surfaces, covered by colloidal particlesCapillary wavesOscillation of dropletsMarangoni flow and surface instabilitiesEvaporation of droplets. The Kelvin and the coffee-stain effectsCondensation, growth and coalescence of droplets and the breath-figure self-assemblyDynamics of wetting: bouncing, spreading and rolling of droplets (water hammer effect - water entry and drag-out problems)Superhydrophobicity and superoleophobicity: the Wenzel and Cassie wetting regimesThe Leidenfrost effect. Liquid marbles: self-propulsionPhysics, geometry, life and death of soap films and bubbles.Preface; Contents; Symbol index; 1. What is surface tension?; 2. Wetting of surfaces: the contact angle; 3. Surface tension-assisted floating of heavy and light objects and walking of water striders; 4. Capillary interactions between particles. Particles placed on liquid surfaces. Elasticity of liquid surfaces, covered by colloidal particles; 5. Capillary waves; 6. Oscillation of droplets; 7. Marangoni flow and surface instabilities; 8. Evaporation of droplets. The Kelvin and the coffee-stain effects; 9. Condensation, growth and coalescence of droplets and the breath-figure self-assembly10. Dynamics of wetting: bouncing, spreading and rolling of droplets (water hammer effect -- water entry and drag-out problems)11. Superhydrophobicity and superoleophobicity: the Wenzel and Cassie wetting regimes; 12. The Leidenfrost effect. Liquid marbles: self-propulsion; 13. Physics, geometry, life and death of soap films and bubbles; Index1 online resource (xxii, 232 pages)
Appropriations of Irish drama by modern Korean nationalist theatre : a focus on the influence of Sean O’Casey in a colonial context
No full textMy thesis explores how a translated author on the periphery of the host culture’s
translated repertoire can be at once subversive and innovative on the colonial scene,
using as an example the case of Sean O’Casey in colonial Korea. It explores the
importation of Irish drama in modern Korean theatre during the colonial period and
examines the appropriations of O’Casey’s plays by a central Korean playwright, Yu
Chi-jin, in creating his own plays. Under Japanese colonial rule in the early twentieth
century, intellectuals perceived the supreme task for the Korean people to be the
recovery of national sovereignty and independence. The modern Korean theatre
movement which rose among Korean intellectuals and dramatists during the colonial
period was to play a major part in this task. The ultimate goal of this movement was
to establish a modern national theatre promoting Korean culture and educating the
people, thereby recovering national independence. As their modernised dramatic
polysystem was still "young", Korean intellectuals and dramatists who were
involved in the theatre movement had to borrow dramatic models from other
countries. One of the models they chose was Irish playwrights, especially those who
were involved in the Irish dramatic movement. They published or staged the works
of W.B. Yeats, Lord Dunsany [Edward John Moreton Drax Plunkett], Augusta
Gregory, J.M. Synge, St. J. Ervine, T.C. Murray and Sean O'Casey. Although
O'Casey was considered an important dramatist in the Irish dramatic movement, he
was a playwright on the periphery in the list of translated Irish dramatists in Korea
due to the colonisers’ censorship. However, he remained as a subversive and
innovative playwright on the colonial scene by virtue of being appropriated by Yu
Chi-jin who used O’Casey’s plays as models when creating his own works. In
discussing the subject matter of my thesis, I use Even Zohar’s polysystems theory as
a starting point in looking at ideological issues surrounding translation and extend
the discussion to offer a postcolonial perspective. While most translation in a
colonial context was considered as "an expression of the cultural power of the
colonisers," my thesis shifts the focus to translation as an expression of the cultural
power of the colonised. I explore how the colonised uses another colonised culture to
subvert the colonisers’ power
Wetting of real surfaces
No full textThe problem of wetting and drop dynamics on various surfaces is very interesting from both the scientificas well as thepractical viewpoint, and subject of intense research.The results are scattered across papers in journals, sothis workwill meet the need for a unifying, comprehensive work
Square tilings of surfaces from discrete harmonic 1-chains
No full textWorks of Dehn [De] and Brooks, Smith, Stone, and Tutte [BSST] have noted a classical correspondence between planar electrical networks and square tilings of a Euclidean rectangle. In this thesis, a generalization of this result is proven for a closed, orientable surface S_g of genus g greater than or equal to 1 with a CW decomposition Gamma and a generic non-zero 1st homology class. From these data, a square-tiled flat cone metric on S_g is produced. The construction utilizes a discrete harmonic representative, and a discrete Poincar e-Hopf theorem is obtained in the process. Similar results for non-generic non-zero homology class are also obtained where the metric and tiling are constructed on a surface of equal or lower genus. Additionally, we obtain similar constructions of square-tiled metrics on surfaces with boundary via modi cation of the harmonicity conditions. Finally, it is simple to obtain rectangle-tiled flat cone metrics with the extra data of a resistance function r on the edges of Gamma, and the necessary changes are described.Ph.D.Includes bibliographical referencesby Edward Der-Yu Chie
Zhen dui gao mi du cheng shi de cheng shi qi hou gui hua yu she ji zong he ce lüe: Xianggang an li
No full textYuan, Chao = 針對高密度城市的城市氣侯規劃與設計綜合策略 : 香港案例 / 袁超.Thesis Ph.D. Chinese University of Hong Kong 2014.Includes bibliographical references (leaves 124-134).Abstracts also in Chinese.Title from PDF title page (viewed on 10, November, 2016).Yuan, Chao = Zhen dui gao mi du cheng shi de cheng shi qi hou gui hua yu she ji zong he ce lüe : Xianggang an li
Economic immigrant parents’ educational involvement in Prince Edward Island
No full textAs a strategy for addressing the issues of aging population and economic development, the
Canadian government collaborated with provinces and territories and continued to develop
policies and programs to recruit substantial economic immigrants in recent decades. Many
economic immigrants choose Canada as a destination country because of its quality education
systems and services for their children, and they also eagerly search opportunities to engage in
their children’s schooling after landing in Canada. The purpose of this study was to investigate
economic immigrants’ parental involvement in their children’s education in Prince Edward Island
(PEI), Canada. Specifically, this research examined (1) immigrant’s obligations and expectations
while involving themselves in children’s education; (2) immigrants’ parental involvement in
children’s education; (3) the essential challenges and issues influencing immigrants’ parental
involvement; and, (4) immigrants’ perception for their educational involvement in public schools.
Answers to these topics are critical for schools, educators, and parents as they will eventually
inform the best policy, program, and practices supporting immigrants’ parental involvement in
education.
Informed by Epstein's (2001) Parental Involvement Framework, McNeal (1999) and Coleman's (1988) Social Capital Theory, this research study adopted a qualitative research design to
understand economic immigrants’ experiences and perception of their parental involvement in
Canadian public schools. Eight immigrant parents from five different countries voluntarily
participated in the study. Data analysis revealed four major sources for immigrants to collect
needed information, eight challenges and five requests calling to inform their parental
involvement in education. The immigrants not only hold high expectations for their children, but
also actively involve themselves in home-based learning and parent-teacher communications. However, these parents scarcely had opportunities entering the role of leadership and not engaging in community collaboration mainly due to language barriers and culture differences.
Recommendations generated from the findings include offering immigrant parents workshops on
Canadian education and cultures, and fostering cross-cultural sensitiveness for family-school communication through professional development for educators
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