title: Coronal heating distribution due to low-frequency, wave-driven turbulence

authors: Dmitruk, Pablo

subjects: MHD

abstract: The heating of the lower solar corona is examined using numerical simulations and theoretical models of magnetohydrodynamic turbulence in open magnetic regions. A turbulent energy cascade to small length scales perpendicular to the mean magnetic field can be sustained by driving with low-frequency Alfvén waves reflected from mean density and magnetic field gradients. This mechanism deposits energy efficiently in the lower corona, and we show that the spatial distribution of the heating is determined by the mean density through the Alfvén speed profile. This provides a robust heating mechanism which can explain observed high coronal temperatures and accounts for the significant heating (per unit volume) distribution below 2 solar radii needed in models of the origin of the solar wind. The obtained heating per unit mass, on the other hand, is much more extended, indicating that the heating on a per-particle basis persists throughout all the lower coronal region considered here.

text: Coronal heating distribution due to low-frequency, wave-driven turbulence The heating of the lower solar corona is examined using numerical simulations and theoretical models of magnetohydrodynamic turbulence in open magnetic regions. A turbulent energy cascade to small length scales perpendicular to the mean magnetic field can be sustained by driving with low-frequency Alfvén waves reflected from mean density and magnetic field gradients. This mechanism deposits energy efficiently in the lower corona, and we show that the spatial distribution of the heating is determined by the mean density through the Alfvén speed profile. This provides a robust heating mechanism which can explain observed high coronal temperatures and accounts for the significant heating (per unit volume) distribution below 2 solar radii needed in models of the origin of the solar wind. The obtained heating per unit mass, on the other hand, is much more extended, indicating that the heating on a per-particle basis persists throughout all the lower coronal region considered here.

year: 2002

title: The Representation of Gender in Contemporary Chinese Television Advertising: An Analysis of Content, Meaning, and Production

authors: Shao, Yun

subjects: advertising

abstract: This thesis examines how gender is portrayed in Chinese television commercials and how these representations reflect the social and cultural contexts of their production and the institutional practices of advertising production personnel. To date, while there have been a plethora of studies on gender representation in advertising in western contexts only limited attention has been given to Chinese advertising portrayals of gender. This study, therefore, explores particular ways in which femininity and masculinity are discursively constructed, and how this process, in turn, contributes to reinforcing and/or challenging certain gender ideologies, in particular those found in Chinese Confucian culture. The study is unique in its approach to Chinese television advertising in that it combines methods from textual analysis (quantitative content analysis, semiotic analysis and critical discourse analysis) and empirical research (interview). A sample of 679 television commercials was collected and analysed in this investigation. Content analysis was initially applied to identify recurrent patterns and characteristics of gender representation which, in turn, formed the basis for in-depth semiotic and discourse analysis. Specific signs, images, codes, discourses and myths were subsequently discussed. The study also included semi-structured interviews with 26 Chinese advertising personnel in order to understand their multiple dispositions toward gender and their actual experiences of depicting female and male characters in the creative process. Several main findings emerged from this study. The portrayal of gender in Chinese television commercials is complex because it embodies a series of simultaneously conflicting and complementary discourses on what constitute femininity and masculinity. The results of the content analysis revealed that the representation of gender in this study’s sample still remains stereotypical in terms of the different distribution of the sexes across product category, role, dress, age, credibility and voice-over. By focusing on the constructs of gender in domestic, occupational and recreational contexts, the use of semiotic and discourse analysis revealed that Chinese television advertising not only portrays women and men in line with the significant aspects embedded in both Chinese and western patriarchal traditions, but is also constitutive of cultural shifts in gender ideologies through highlighting modern (western) values. In addition, the interview findings yielded support for the conclusions of textual analysis, demonstrating that the process of advertising production is significantly influenced by traditional and modern gender values, the restriction of advertising regulations, client expectations, and the professionals’ divergent perceptions of gender and their assumptions about the audience.

text: The Representation of Gender in Contemporary Chinese Television Advertising: An Analysis of Content, Meaning, and Production This thesis examines how gender is portrayed in Chinese television commercials and how these representations reflect the social and cultural contexts of their production and the institutional practices of advertising production personnel. To date, while there have been a plethora of studies on gender representation in advertising in western contexts only limited attention has been given to Chinese advertising portrayals of gender. This study, therefore, explores particular ways in which femininity and masculinity are discursively constructed, and how this process, in turn, contributes to reinforcing and/or challenging certain gender ideologies, in particular those found in Chinese Confucian culture. The study is unique in its approach to Chinese television advertising in that it combines methods from textual analysis (quantitative content analysis, semiotic analysis and critical discourse analysis) and empirical research (interview). A sample of 679 television commercials was collected and analysed in this investigation. Content analysis was initially applied to identify recurrent patterns and characteristics of gender representation which, in turn, formed the basis for in-depth semiotic and discourse analysis. Specific signs, images, codes, discourses and myths were subsequently discussed. The study also included semi-structured interviews with 26 Chinese advertising personnel in order to understand their multiple dispositions toward gender and their actual experiences of depicting female and male characters in the creative process. Several main findings emerged from this study. The portrayal of gender in Chinese television commercials is complex because it embodies a series of simultaneously conflicting and complementary discourses on what constitute femininity and masculinity. The results of the content analysis revealed that the representation of gender in this study’s sample still remains stereotypical in terms of the different distribution of the sexes across product category, role, dress, age, credibility and voice-over. By focusing on the constructs of gender in domestic, occupational and recreational contexts, the use of semiotic and discourse analysis revealed that Chinese television advertising not only portrays women and men in line with the significant aspects embedded in both Chinese and western patriarchal traditions, but is also constitutive of cultural shifts in gender ideologies through highlighting modern (western) values. In addition, the interview findings yielded support for the conclusions of textual analysis, demonstrating that the process of advertising production is significantly influenced by traditional and modern gender values, the restriction of advertising regulations, client expectations, and the professionals’ divergent perceptions of gender and their assumptions about the audience.

year: 2011

title: Rumours of gold at Te Aroha

authors: Hart, Philip

abstract: From the time of the opening of the Thames goldfield, miners were tormented by the belief that the best gold would be found in Te Aroha mountain, on their southern horizon - so near and yet so far because of Maori resistance to prospecting that district. Some Maori claimed to have found gold there, and visiting Pakeha from at least the 1850s onwards detected gold in the vicinity. The first time gold in the Waiorongomai valley was noted was in 1868. Several prospectors claimed to have explored the district, illegally and, potentially, dangerously, especially after Ohinemuri was opened to mining in 1875. But not until Hone Werahiko found gold in 1880 and the field was officially opened on 25 November would it be possible to prove whether a payable goldfield existed.

text: Rumours of gold at Te Aroha From the time of the opening of the Thames goldfield, miners were tormented by the belief that the best gold would be found in Te Aroha mountain, on their southern horizon - so near and yet so far because of Maori resistance to prospecting that district. Some Maori claimed to have found gold there, and visiting Pakeha from at least the 1850s onwards detected gold in the vicinity. The first time gold in the Waiorongomai valley was noted was in 1868. Several prospectors claimed to have explored the district, illegally and, potentially, dangerously, especially after Ohinemuri was opened to mining in 1875. But not until Hone Werahiko found gold in 1880 and the field was officially opened on 25 November would it be possible to prove whether a payable goldfield existed.

year: 2016