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Article
Publication date: 7 August 2020

Elaine Lim, Tze Cheng Kueh and Yew Mun Hung

The present study aims to investigate the inverse-thermocapillary effect in an evaporating thin liquid film of self-rewetting fluid, which is a dilute aqueous solution…

Abstract

Purpose

The present study aims to investigate the inverse-thermocapillary effect in an evaporating thin liquid film of self-rewetting fluid, which is a dilute aqueous solution (DAS) of long-chain alcohol.

Design/methodology/approach

A long-wave evolution model modified for self-rewetting fluids is used to study the inverse thermocapillary characteristics of an evaporating thin liquid film. The flow attributed to the inverse thermocapillary action is manifested through the streamline plots and the evaporative heat transfer characteristics are quantified and analyzed.

Findings

The thermocapillary flow induced by the negative surface tension gradient drives the liquid from a low-surface-tension (high temperature) region to a high-surface-tension (low temperature) region, retarding the liquid circulation and the evaporation strength. The positive surface tension gradients of self-rewetting fluids induce inverse-thermocapillary flow. The results of different working fluids, namely, water, heptanol and DAS of heptanol, are examined and compared. The thermocapillary characteristic of a working fluid is significantly affected by the sign of the surface tension gradient and the inverse effect is profound at a high excess temperature. The inverse thermocapillary effect significantly enhances evaporation rates.

Originality/value

The current investigation on the inverse thermocapillary effect in a self-rewetting evaporating thin film liquid has not been attempted previously. This study provides insights on the hydrodynamic and thermal characteristics of thermocapillary evaporation of self-rewetting liquid, which give rise to significant thermal enhancement of the microscale phase-change heat transfer devices.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 31 no. 4
Type: Research Article
ISSN: 0961-5539

Keywords

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Book part
Publication date: 31 March 2015

Ho-fung Hung

From the sixteenth to eighteenth century, China underwent a commercial revolution similar to the one in contemporaneous Europe. The rise of market did foster the rise of a…

Abstract

From the sixteenth to eighteenth century, China underwent a commercial revolution similar to the one in contemporaneous Europe. The rise of market did foster the rise of a nascent bourgeois and the concomitant rise of a liberal, populist version of Confucianism, which advocated a more decentralized and less authoritarian political system in the last few decades of the Ming dynasty (1368–1644). But after the collapse of the Ming Empire and the establishment of the Qing Empire (1644–1911) by the Manchu conquerors, the new rulers designated the late-Ming liberal ideologies as heretics, and they resurrected the most conservative form of Confucianism as the political orthodoxy. Under the principle of filial piety given by this orthodoxy, the whole empire was imagined as a fictitious family with the emperor as the grand patriarch and the civil bureaucrats and subjects as children or grandchildren. Under the highly centralized administrative and communicative apparatus of the Qing state, this ideology of the fictitious patrimonial state penetrated into the lowest level of the society. The subsequent paternalist, authoritarian, and moralizing politics of the Qing state contributed to China’s nontransition to capitalism despite its advanced market economy, and helped explain the peculiar form and trajectory of China’s popular contention in the eighteenth century. I also argue that this tradition of fictitious patrimonial politics continued to shape the state-making processes in twentieth-century China and beyond.

Details

Patrimonial Capitalism and Empire
Type: Book
ISBN: 978-1-78441-757-4

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Book part
Publication date: 25 November 2019

Kien Nguyen-Trung

In late 2015, the El Nĩno phenomenon induced Vietnam’s worst drought in 60 years, which lasted until mid-2016 and intensified the most expansive saline intrusion in 90…

Abstract

In late 2015, the El Nĩno phenomenon induced Vietnam’s worst drought in 60 years, which lasted until mid-2016 and intensified the most expansive saline intrusion in 90 years. The combination of the two hazards resulted in a large-scale disaster, which has led 18 provinces of Vietnam, most of them from the Mekong Delta, to water shortage, insanitation, human and animal diseases, food emergency need and a considerable disruption in local communities’ livelihoods. These devastating effects raise the question of what makes local households vulnerable to drought and saline intrusion. The chapter argues that vulnerability to the natural disaster is not something resulted from external threats, but rather, is derived from the interplay between social structures residing deeply inside the socio-economic systems and agency’s conditions presenting at the household level. Social structures are rules and procedures that constrain and/or enable human actions in agricultural production, risk taking and adaptation. Agency refers to the capacities of disaster-affected households in the Vietnamese Mekong Delta who cultivated third rice crop and suffered heavily from the 2015–2016 disaster. In addition to households’ lack of planning and coping capacities, the constitution of vulnerability to drought and saline intrusion can be attributed to the interaction between farmers’ choice of extra rice crops and the state’s policies and directions in agricultural and irrigation development since 1990s to date.

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Article
Publication date: 1 May 2005

C.W.M. Yuen, S.K.A. Ku, P.S.R. Choi, C.W. Kan and S.Y. Tsang

An infrared (IR) spectroscopic technique was used to determine the possible functional groups and chemical compounds present in commercially available ink-jet printing…

Abstract

An infrared (IR) spectroscopic technique was used to determine the possible functional groups and chemical compounds present in commercially available ink-jet printing reactive dyes of four primary colours, i.e. Cyan, Magenta, Yellow, and Black. Although other instrumental analytical methods can help to determine the actual chemical composition of reactive dyes, the IR technique alone can still provide important structural information about the commercially available reactive dyes. Experimental results revealed that the reactive dyes under determination contained the same functional groups and chemical compounds as the reference reactive dyes.

Details

Research Journal of Textile and Apparel, vol. 9 no. 2
Type: Research Article
ISSN: 1560-6074

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Article
Publication date: 1 November 2005

C.K. Chan, X.Y. Jiang, L.K. Chan, K. Liew, W.K. Wong and M.P. Lau

Comfort is one of the most important attributes demanded by modern clothing consumers. It reflects the psychological feeling of a wearer, featured by three latent…

Abstract

Comfort is one of the most important attributes demanded by modern clothing consumers. It reflects the psychological feeling of a wearer, featured by three latent independent sensory factors: thermal comfort, tactile comfort, and psychological comfort. This paper presents a detailed discussion of the mechanisms influencing different thermal variables on the basis of the thermal comfort properties of 12 commercial types of uniform materials collected from different sources with various fiber content, blend composition, fabric weave, color and end uses. Results generated include thermal conductivity, air permeability and moisture permeability since it is well established that the movement of heat, moisture and air through a fabric are the major factors governing clothing thermal comfort. The initiated research is intended to enable a quantitative analysis of the comfort properties of uniform fabrics currently in use. The results will help establish comfort levels for a wide range of fabric types and assist in fabric selection during uniform product development. In addition, this study might have potential application to other clothing products as well.

Details

Research Journal of Textile and Apparel, vol. 9 no. 4
Type: Research Article
ISSN: 1560-6074

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Article
Publication date: 5 September 2017

Siu Keung Cheung and Wing Sang Law

The majority of Hong Kong filmmakers have pursued co-production with China filmmakers for having the Mainland market at the expense of local styles and sensitivities. To…

Abstract

Purpose

The majority of Hong Kong filmmakers have pursued co-production with China filmmakers for having the Mainland market at the expense of local styles and sensitivities. To many critics, the two-part series of Ip Man and Ip Man II provide a paradigmatic case of film co-production that sell the tricks of Chinese kung fu, regurgitating the overblown Chinese nationalism against Japanese and kwai-lo. The purpose of this study is to rectify such observation of the Ip Man series.

Design/methodology/approach

The authors read the series deconstructively as a postcolonial text in which Hong Kong identity is inscribed in the negotiated space in between different versions of Chinese nationalism.

Findings

The analysis points to the varying subversive features in the series from which Hong Kong’s colonial experiences are tacitly displayed, endorsed and rewritten into the Chinese nationalistic discourse whose dominance is questioned, if not debased.

Originality/value

This paper advances new research insights into the postcolonial reinvention of kung fu film and, by implication, the Hong Kong cinema in general.

Details

Social Transformations in Chinese Societies, vol. 13 no. 2
Type: Research Article
ISSN: 1871-2673

Keywords

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Article
Publication date: 1 August 2005

X.Y. Cheng, M.Y. Leung, X.M. Tao, C.W. Yuen, W.Y. Kwok and P. Xue

Polypyrrole (PPy)-coated fabric can be produced by means of chemical vapour deposition using pyrrole in the presence of an oxidizing agent. This electrically conductive…

Abstract

Polypyrrole (PPy)-coated fabric can be produced by means of chemical vapour deposition using pyrrole in the presence of an oxidizing agent. This electrically conductive fabric can be used as a strain sensor, and has high potential for producing wearable sensors that can detect the movements of the wearer. Since direct contact between this conductive fabric and human body will be involved, an investigation of the effect of different types of liquids such as sweat, rain water, drinking water, etc. on the electrical conductivity of fabric sensors is critical. Changes in the conductivity and surface morphology of the PPy-coated textile were analysed by placing few drops of liquid onto the fabrics. The results showed that the electrical resistance of the PPy-coated fabrics was different when the fabrics came into contact with different types of liquid. The phenomenon can be explained by both the fibre/fibre contact and yarn/yarn contact models as well as by the uniformity of the PPy-coating layer on the surface of the fibre.

Details

Research Journal of Textile and Apparel, vol. 9 no. 3
Type: Research Article
ISSN: 1560-6074

Keywords

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Expert briefing
Publication date: 25 June 2015

Electoral politics in Taiwan.

Details

DOI: 10.1108/OXAN-DB200541

ISSN: 2633-304X

Keywords

Geographic
Topical
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Article
Publication date: 23 February 2010

Hoang Vinh Hung, Rajib Shaw and Masami Kobayashi

The purpose of this paper is to investigate the reasons for an unusual over‐development of flood‐prone areas outside the river dyke in Hanoi, while analysing the urban…

Abstract

Purpose

The purpose of this paper is to investigate the reasons for an unusual over‐development of flood‐prone areas outside the river dyke in Hanoi, while analysing the urban development and disaster management policies, and to suggest policy measures for regulating the rapid urbanization incorporating catastrophic flood risk planning.

Design/methodology/approach

Urban development and disaster management policies were analyzed and key stakeholders were interviewed to discover the effectiveness of the policies and governance tasks.

Findings

A discrepancy was identified between the goals of urban development and disaster management. The negative side of this discrepancy has been amplified by ineffective Construction Regulations and a lack of specificity with regard to Ordinances on Dyke. These factors, combined with poor coordination and lack of motivation within the city authorities in managing the Riverside Urban Areas (RUA), have contributed to the over‐development, which consists primarily of squatting and illegal construction.

Research limitations/implications

Along with a consideration of community perception of catastrophic flood risk in the RUA, which has been examined, the paper further analyses the effectiveness of related policies for catastrophic risk reduction in the RUA.

Practical implications

The paper identifies the following effective measures: build and share a knowledge base concerning catastrophic flood risk and sustainable ways of coping with the flood; be responsible and develop a commitment to manage flood‐prone areas; and develop better coordination between urban development and flood management.

Originality/value

The paper suggests new policy standards for managing the RUA development and reducing flood risks.

Details

Disaster Prevention and Management: An International Journal, vol. 19 no. 1
Type: Research Article
ISSN: 0965-3562

Keywords

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Executive summary
Publication date: 21 December 2020

GHANA: Hung parliament will test Akufo-Addo's control

Details

DOI: 10.1108/OXAN-ES258333

ISSN: 2633-304X

Keywords

Geographic
Topical
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