title: Scaling anisotropy of the power in parallel and perpendicular components of the solar wind magnetic field

authors: Forman, Miriam A.

subjects: astrophysical plasma

abstract: Power spectra of the components of the magnetic field parallel (Pzz) and perpendicular (Pzz+Pyy) to the local mean magnetic field direction were determined by wavelet methods from Ulysses’ MAG instrument data during eighteen 10-day segments of its first North Polar pass at high latitude at solar minimum in 1995. The power depends on frequency f and the angle θ between the solar wind direction and the local mean field, and with distance from the Sun. This data includes the solar wind whose total power (Pxx + Pyy + Pzz) in magnetic fluctuations we previously reported depends on f and the angle θ nearly as predicted by the GS95 critical balance model of strong incompressible MHD turbulence. Results at much wider range of frequencies during six evenly-spaced 10-day periods are presented here to illustrate the variability and evolution with distance from the Sun. Here we investigate the aniso tropic scaling of Pzz(f,θ) in particular because it is a reduced form of the Poloidal (pseudo-Alfvenic) component of the (incompressible) fluctuations. We also report the much larger Pxx(f,θ)+Pyy(f,θ) which is (mostly) reduced from the Toroidal (Alfvenic, i.e., perpendicular to both B and k) fluctuations, and comprises most of the total power. These different components of the total power evolve and scale differently in the inertial range. We compare these elements of the magnetic power spectral tensor with “critical balance” model predictions.

text: Scaling anisotropy of the power in parallel and perpendicular components of the solar wind magnetic field Power spectra of the components of the magnetic field parallel (Pzz) and perpendicular (Pzz+Pyy) to the local mean magnetic field direction were determined by wavelet methods from Ulysses’ MAG instrument data during eighteen 10-day segments of its first North Polar pass at high latitude at solar minimum in 1995. The power depends on frequency f and the angle θ between the solar wind direction and the local mean field, and with distance from the Sun. This data includes the solar wind whose total power (Pxx + Pyy + Pzz) in magnetic fluctuations we previously reported depends on f and the angle θ nearly as predicted by the GS95 critical balance model of strong incompressible MHD turbulence. Results at much wider range of frequencies during six evenly-spaced 10-day periods are presented here to illustrate the variability and evolution with distance from the Sun. Here we investigate the aniso tropic scaling of Pzz(f,θ) in particular because it is a reduced form of the Poloidal (pseudo-Alfvenic) component of the (incompressible) fluctuations. We also report the much larger Pxx(f,θ)+Pyy(f,θ) which is (mostly) reduced from the Toroidal (Alfvenic, i.e., perpendicular to both B and k) fluctuations, and comprises most of the total power. These different components of the total power evolve and scale differently in the inertial range. We compare these elements of the magnetic power spectral tensor with “critical balance” model predictions.

year: 2013

title: Sustainable livelihood development: A case study measuring social capital and its role in sustainable livelihood development in Zoucheng, China

authors: Liu, Shaoyong

subjects: sustainable livleihood development

abstract: This thesis is to discover whether the strength of social capital can alter household livelihoods and their sustainability. The intention of this thesis is to answer two questions: (1) Can different types of social ties (kin and non-kin ties) lead to differential access to social capital in a small community in China？(2) Does the strength of social capital alter local livelihood patterns by diversifying household livelihoods, or producing new livelihoods in an industry that has potential for development? 
This thesis, using a quantitative methodology, focuses on social capital measures. It begins with data collection on the social capital status and livelihoods of mining households. The household survey used a random recruitment for sample selection, which involved 228 participants in mines and related working departments (e.g. electricity, and the corporate headquarters of the local biggest mining company) in Zoucheng city, Shandong Province, China. OLS regression models used the household survey to generate associations of variables, such as human capital resources for respondents, length and location of residency, access to social networks, etc. with the composite measure of access to social capital. With these analyses and background information about Zoucheng, I use a simulation model to project the alternative livelihoods for local rural households based on local resources (e.g. farmland, tourism, and mineral resources). The aim of the simulation model was to better understand the role that social capital might play in possible transitions to alternative livelihoods (namely, tourism and farming).

The research results argue that both kin ties and weak ties (such as friendships) are important factors associated with social capital for mining sector residents in Zoucheng (Chapter Six). The advantages of strengthened social capital are presented in the simulation model (Chapter Eight). As social capital was enhanced, both incomes and number of rural tourism operators increased. These results have implications for governmental policy regarding livelihood strategy diversification and poverty alleviation. An understanding of these concepts may play a role in assisting emerging economies to be resilient at local levels and better equipped to withstand exogenous shocks in certain cultural contexts (e.g. Confucian society).

text: Sustainable livelihood development: A case study measuring social capital and its role in sustainable livelihood development in Zoucheng, China This thesis is to discover whether the strength of social capital can alter household livelihoods and their sustainability. The intention of this thesis is to answer two questions: (1) Can different types of social ties (kin and non-kin ties) lead to differential access to social capital in a small community in China？(2) Does the strength of social capital alter local livelihood patterns by diversifying household livelihoods, or producing new livelihoods in an industry that has potential for development? 
This thesis, using a quantitative methodology, focuses on social capital measures. It begins with data collection on the social capital status and livelihoods of mining households. The household survey used a random recruitment for sample selection, which involved 228 participants in mines and related working departments (e.g. electricity, and the corporate headquarters of the local biggest mining company) in Zoucheng city, Shandong Province, China. OLS regression models used the household survey to generate associations of variables, such as human capital resources for respondents, length and location of residency, access to social networks, etc. with the composite measure of access to social capital. With these analyses and background information about Zoucheng, I use a simulation model to project the alternative livelihoods for local rural households based on local resources (e.g. farmland, tourism, and mineral resources). The aim of the simulation model was to better understand the role that social capital might play in possible transitions to alternative livelihoods (namely, tourism and farming).

The research results argue that both kin ties and weak ties (such as friendships) are important factors associated with social capital for mining sector residents in Zoucheng (Chapter Six). The advantages of strengthened social capital are presented in the simulation model (Chapter Eight). As social capital was enhanced, both incomes and number of rural tourism operators increased. These results have implications for governmental policy regarding livelihood strategy diversification and poverty alleviation. An understanding of these concepts may play a role in assisting emerging economies to be resilient at local levels and better equipped to withstand exogenous shocks in certain cultural contexts (e.g. Confucian society).

year: 2017

title: Strawmen and the decolonisation of the academy

authors: Tauri, Juan Marcellus

subjects: Social justice

abstract: For this piece I take as my point of departure Biko Agozino’s response to a series of questions posed by a member of the audience, to a panel he was a member of during this time in New Zealand. The panel in question was part of the launch of a new journal, Decolonisation of Criminology and Justice, at AUT University, Auckland in June 2018. Biko was invited to give a speech at the launch of the journal, and participate in a panel discussion on the broad theme of ‘decolonising criminology and criminal justice’.

text: Strawmen and the decolonisation of the academy For this piece I take as my point of departure Biko Agozino’s response to a series of questions posed by a member of the audience, to a panel he was a member of during this time in New Zealand. The panel in question was part of the launch of a new journal, Decolonisation of Criminology and Justice, at AUT University, Auckland in June 2018. Biko was invited to give a speech at the launch of the journal, and participate in a panel discussion on the broad theme of ‘decolonising criminology and criminal justice’.

year: 2019-07-10