Thermal performance analysis of earth pipe cooling system for subtropical climate

Energy crisis is one of the major obstacles for human development. There are on-going researches to overcome this for a sustainable environment and economy. Passive air cooling system of earth pipe cooling is seen as a viable energy efficient technology for hot and humid subtropical climates. It can be an attractive economical alternative to conventional cooling since there are no compressors or any habitual mechanical unit. It utilizes earth’s near constant underground temperature to cool air for residential, agricultural or industrial uses. This paper reports the thermal performance of earth pipe cooling technology for a hot and humid subtropical climatic zone in Queensland, Australia. A series of pipes buried underground were used in order to increase the cooling performance of the system. To measure the thermal performance, a thermal model was developed for the earth pipe cooling system and simulated using ANSYS Fluent. Data were collected from two modelled rooms built from shipping containers and installed at Central Queensland University, Rockhampton, Australia. The impact of air temperature and velocity on room cooling performance has also been assessed. A significant temperature reduction is seen in this study, which will save energy cost for thermal cooling in buildings.

ID scanners in the night-time economy: Social sorting or social order?

Digital technologies are often considered effective methods of deterring or preventing crime. New forms of surveillance have particular appeal when attempting to reduce violence in the night-time economy, given ongoing concerns over perceived increases in the frequency and severity of reported assaults. This study examines the rationales for adopting compulsory patron ID scanning as a key method of reducing violence in and around licensed venues in the Victorian regional city of Geelong. Using a mixed methods approach, this paper challenges the popular perception that ID scanning has helped to reduce violence Geelong’s night-time economy. Further, the research identifies several limits in the administration of this technology that potentially undermine patron safety in the night-time economy. The authors conclude by proposing a series of reforms to address current regulatory gaps associated with ID scanning and related surveillance and identity authentication technologies to prevent crime.

ID scanners and uberveillance in the night-time economy: crime prevention or invasion of privacy?

ID scanners are promoted as an effective solution to the problems of anti-social behavior and violence in many urban nighttime economies. However, the acceptance of this and other forms of computerized surveillance to prevent crime and anti-social behavior is based on several unproven assumptions. After outlining what ID scanners are and how they are becoming a normalized precondition of entry into one Australian nighttime economy, this chapter demonstrates how technology is commonly viewed as the key to preventing crime despite recognition of various problems associated with its adoption. The implications of technological determinism amongst policy makers, police, and crime prevention theories are then critically assessed in light of several issues that key informants talking about the value of ID scanners fail to mention when applauding their success. Notably, the broad, ill-defined, and confused notion of “privacy” is analyzed as a questionable legal remedy for the growing problems of überveillance.

The Twitter float and free labour : the political economy of digital media

Nick Dyer-Witheford’s Cyber-Marx was published nearly 15 years ago, but there are continuing echoes of its dire promises today. The trends that Dyer-Witheford outlined—the growth of tech-giants in the communications field at the expense of democratic media practices and the radical shedding of jobs in the traditional mass media context—are confirmed by recent events. In November 2013, Twitter launched itself on the public share register, despite having no visible means of financial support, or even much of a business plan. The Twitter IPO tells us a lot about the economy of cyber-capitalism. Aligned to the trend of ‘technological unemployment’ is the rise of what some commentators call ‘digital serfdom’. This is not just growing unemployment, but also drastic under-employment of talented media professionals and an alarming rise in the number of media outlets that want to pay contributors in ‘exposure’, rather than in corporeal, fungible dollars and cents. This articlediscusses these trends and events in the context of the political economy of digital communication.

Someone’s looking at you: welcome to the surveillance economy

Everything that fugitive whistle-blower Edward Snowden has revealed about America’s global espionage network PRISM should make you alert and alarmed. His exposé shows that we are clearly living in a well-established surveillance society. But it also reveals more than that: surveillance is at the heart of the global digital economy too.

Capital and Consumption Tax Reforms in a Small Open Economy

The effects of a reform in capital and consumption taxes on private welfare and government tax revenue are examined for a small open, capital-importing economy. A trade-off between private welfare and tax revenue is encountered in maximizing social welfare. Nonetheless, lowering capital taxes and raising consumption taxes can increase both private welfare and tax revenue if the initial tax rates are not optimal. In addition, a tax reform by this fashion is a likely response to a rise in the foreign rate of return on capital.

Islam and development: exploring the invisible aid economy

The study of Islam since the advent of 9/11 has made a significant resurgence. However, much of the work produced since then has tended to focus on the movements that not only provide aid to their fellow Muslims, but also have political and at times violent agendas. This tendency has led to a dearth of research on the wider Muslim aid and development scene. Focusing on the role and impact of Islam and Islamic FBOs, an arena that has come to be regarded by some as the 'invisible aid economy', Islam and Development considers Islamic theology and its application to development and how Islamic teaching is actualized in case studies of Muslim FBOs. It brings together contributions from the disciplines of theology, sociology, politics and economics, aiming both to raise awareness and to function as a corrective step within the development studies literature.