Comparisons of seismic rock slope stability assessments between the Hoek-Brown and Mohr-Coulomb failure criteria

Current investigations have shown that earthquakes can trigger significant damages of equipment, property infrastructure and environment. This is a persistent cause of economic loss for any country, especially for the loss of life. The conventional method for slope stability design is to utilize limit equilibrium method (LEM) in conjunction with the pseudo-static (PS) approach. However, the LEM has a significant drawback which is to determine the slip surface before factor of safety calculation. The numerical upper and lower bound limit analysis method employed in this paper can avoid this limitation. In this study, the presented slope stability evaluations considering earthquake effects based on the finite difference method will be discussed and compared with the results from the numerical limit analysis methods.

Women directors on boards of Australian Real Estate Investment Trusts

Purpose – This is the first paper which aims to investigate factors that might influence the gender composition of boards of directors of Australian Real Estate Investment Trusts (A-REITs).

Design/methodology/approach – This study follows Mateos de Cabo, Gimeno and Nieto and the gender diversity literature and investigates the existence and number of women directors on the boards of directors of 37 A-REITs from 2006 to 2011.

Findings – There is evidence that larger (by market capitalization) A-REITs are more likely to employ a woman director and that A-REITs with larger boards are more likely to employ a woman director and indeed more women directors. It also appears that A-REITs whose head office is in Sydney are more likely to employ a woman director and also more women directors.

Practical implications – Women seeking to be engaged as directors of A-REITs are more likely to be employed by larger A-REITs (by market capitalization), those with larger boards and those located in Sydney.

Originality/value – This paper adds to the existing literature on gender diversity by examining the factors that appear to influence the employment of women on A-REIT Boards.

The effect of financial constraints, investment policy, product market competition and corporate governance on the value of cash holdings

This study empirically investigates the value shareholders place on excess cash holdings and how shareholders’ valuation of cash holdings is associated with financial constraints, firm growth, cash-flow uncertainty and product market competition for Australian firms from 1990 to 2007. Our results indicate that the marginal value of cash holdings to shareholders declines with larger cash holdings and higher leverage. However, firms that are more financially constrained, that have higher growth rates and that face greater uncertainty exhibit a higher marginal value of cash holdings. These findings are consistent with the explanation that excess cash holdings are not necessarily detrimental to firm value. Firms with costly external financing and that also save more cash for current operating and future investing needs find that the market values these cash hoarding policies favourably. Finally, there is limited evidence of an association between various corporate governance measures and the value of cash holdings for a shorter sample period.

Evaluation of housing developments for sustainability using a multi-criteria approach

New housing developments in Australia, particularly on Greenfield sites on the edge of existing urban centres, need to be sustainable in environmental and social terms if long term problems are to be avoided. Sustainability is multi-dimensional and existing analyses have been found to be inadequate in assessing housing developments holistically. This paper describes research which has used five criteria (energy use, resource use, neighbourhood character, neighbourhood connectivity and diversity), representing 31 indicators, to assess three housing precincts of a regional city in southern Australia. The method has been found to produce useful assessments of sustainability. The method has the potential to inform future housing developments and to be used to improve existing suburbs.

An algorithm to median shortest path problem (MSPP) in the design of urban transportation networks

This paper proposes an efficient solution algorithm for realistic multi-objective median shortest path problems in the design of urban transportation networks. The proposed problem formulation and solution algorithm to median shortest path problem is based on three realistic objectives via route cost or investment cost, overall travel time of the entire network and total toll revenue. The proposed solution approach to the problem is based on the heuristic labeling and exhaustive search technique in criteria space and solution space of the algorithm respectively. The first labels each node in terms of route cost and deletes cyclic and infeasible paths in criteria space imposing cyclic break and route cost constraint respectively. The latter deletes dominated paths in terms of objectives vector in solution space in order to identify a set of Pareto optimal paths. The approach, thus, proposes a non-inferior solution set of Pareto optimal paths based on non-dominated objective vector and leaves the ultimate decision to decision-makers for purpose specific final decision during applications. A numerical experiment is conducted to test the proposed algorithm using artificial transportation network. Sensitivity analyses have shown that the proposed algorithm is advantageous and efficient over existing algorithms to find a set of Pareto optimal paths to median shortest paths problems.

Foreign direct investment and the stages of sector diversification

Foreign direct investment (FDI), when considered homogenous, has case-specific result on sector diversification. However, FDI when disaggregated by its type, market-seeking FDI diversifies developed countries, while efficiency-seeking FDI diversifies developing countries, particularly in the manufacturing sector. Flexible labour markets and well-established financial markets also play important role in this context.

Identifying and developing effective approaches to foster intercultural understanding in schools

This paper provides a systematic review of education literature focused on identifying school-based approaches for developing students’ intercultural understanding. Studies were assessed using selection criteria and then critically appraised for study quality. A key finding from the review is that developing students’ intercultural understanding beyond cultural awareness requires students and teachers to take a critical approach toward cultural diversity, as well as the opportunity for ongoing intercultural and intergroup contact. Studies reported that only building cultural awareness and knowledge is not enough to promote long-term changes in attitudes. There is a need for more rigorously evaluated longitudinal school-based interventions. Finally, studies consistently call for investment in teachers’ professional and personal intercultural capabilities. The paper concludes by calling for school-based interventions that are informed by best practice approaches at a whole school level in order to effectively develop students’ intercultural attitudes and skills.

Reproductive investment and optimum clutch size of Loggerhead Sea Turtles (Caretta caretta)

(1) Data for loggerhead turtles (Caretta caretta L.) nesting on the Greek island of Cephalonia were used to develop a model which predicted the optimum clutch size. (2) There was a positive linear relationship between the number of clutches into which eggs could be divided and the total time spent by a nesting turtle on the beach, and hence a negative relationship between the time invested on the beach per egg and clutch size. (3) A previous study indicated that energy expenditure for nesting turtles on land is very high, so there may be a selective pressure to maximize clutch size in order to minimize the energy expended per egg laid. As there appeared to be no counterselective pressures favouring small clutches, clutch size should be constrained by a female's egg-carryingc apacity,w hich in turn could be expected to be related to her body size. Hence, a positive relationship between clutch size and body size was predicted, and was found in the population under study.