Reinventing Imperata: Revaluing Alang‐Alang Grasslands in Indonesia

This article takes a new look at the economic value and cultural significance of Imperata cylindrica grasslands in Indonesia, drawing particularly on fieldwork in Bali, Lombok and West Timor, where the focus is on the use of alang‐alang grass for roof thatch. The development of tourism has resulted in the commodification of thatch in Bali and Lombok for quality roofing and insulation. With its visual impact reinforcing its traditional cultural significance, the thatched roof has become a tourist artefact, its resulting high price elevating Imperata to the status of temporary cash crop and lucrative export. In West Timor, on the other hand, the grass has become a scarce commodity for roofing traditional houses. While it lacks the high prices of Bali‐Lombok, in Timor the cheapness of thatch in this time of economic crisis has increased its value over alternatives. This article explores the valuing and revaluing of Imperata within various agro‐ecological and economic niches, and provides case studies of some of the highly adaptive and opportunistic responses of local people to land‐use change. While the Bali case represents an extreme example of the grass as commodity, the more significant view of its value is the place it continues to occupy, in a subsistence or contingency sense, in many rural economies.     

The power of precision air strikes and social media feeds in the 2012 Israel–Hamas conflict: ‘targeting transparency’

This article analyses the evolving uses of social media during wartime through the IDF (Israel Defense Forces) Spokesperson Facebook and Twitter accounts. The conflict between Israel and Hamas-affiliated groups in November 2012 has generated interesting data about social media use by a sovereign power in wartime and the resultant networked discourse. Facebook data is examined for effective patterns of dissemination through both content analysis and discourse analysis. Twitter data is explored through connected concept analysis to map the construction of meaning in social media texts shared by the IDF. The systematic examination of this social media data allows the authors’ analysis to comment on the evolving modes, methods and expectations for state public diplomacy, propaganda and transparency during wartime.     

Single-Degree-of-Freedom Characterization of Multi-Phase Passive Control Systems

A Multi-phase Passive Control System (MPCS) combines two passive control devices in order to offset the individual weaknesses and enhance structural performance, allowing the structure to respond effectively to varying levels of loading. Previous work involving a nine-story frame demonstrated the effectiveness of MPCSs but the fundamental understanding of the system was lacking. In order to more clearly understand the behavior and identify important parameters and parameter interactions, a single-degree-of-freedom (SDOF) non-linear dynamic study was performed. The results offer significant insight towards developing structural systems adaptable to multi-objective performance-based design procedures that meet higher performance standards than for ductility-based design.