Total safety culture by behavior-based safety approach

Safety is a social responsibility and providing a safe working environment is the obligation of a responsible employer. Working safely can generate direct financial benefits. However, poor safety planning and management may lead to tremendous adverse effects on cost, time and quality of a project. Statutory liabilities and heavy fines directly increase project cost; losing working hours as a result of safety incident impacts on the project programme. When tradesmen are working in an unsafe site environment, the project quality may be affected. Therefore, promoting "safety" is always the very first and utmost priority in any large scale projects. Bodley (2000) argues that culture involves what people think, what they do, and what they produce. In order to provide a safe working environment, one of the best ways is to create a safety culture within the organization, because organizational-cultural factors play an important role in safety management. Geller emphasises the importance of safety culture and further states that behaviour-based safety (BBS) is a useful approach to uphold organizational safety culture. The basic premise of BBS is self-perception and the degree of self-perception will lead to pleasant safety outcomes. This degree can be measured by level of workers' involvement. When everyone in the project is accountable to safety, they will contribute positively. This paper is a case study reviewing how BBS approach fosters safety culture leading to ultimate success. The model illustrated by the case study will be useful to analyze the organizational safety culture quantitatively.

Privacy preserving in location data release: A differential privacy approach

Communication devices with GPS chips allow people to generate large volumes of location data. However, location datasets have been confronted with serious privacy concerns. Recently, several privacy techniques have been proposed but most of them lack a strict privacy notion, and can hardly resist the number of possible attacks. This paper proposes a private release algorithm to randomize location datasets in a strict privacy notion, differential privacy. This algorithm includes three privacy-preserving operations: Private Location Clustering shrinks the randomized domain and Cluster Weight Perturbation hides the weights of locations, while Private Location Selection hides the exact locations of a user. Theoretical analysis on utility confirms an improved trade-off between the privacy and utility of released location data. The experimental results further suggest this private release algorithm can successfully retain the utility of the datasets while preserving users’ privacy.

A hybrid localization approach in 3D wireless sensor network

Location information acquisition is crucial for many wireless sensor network (WSN) applications. While existing localization approaches mainly focus on 2D plane, the emerging 3D localization brings WSNs closer to reality with much enhanced accuracy. Two types of 3D localization algorithms are mainly used in localization application: the range-based localization and the range-free localization. The range-based localization algorithm has strict requirements on hardware and therefore is costly to implement in practice. The range-free localization algorithm reduces the hardware cost but at the expense of low localization accuracy. On addressing the shortage of both algorithms, in this paper, we develop a novel hybrid localization scheme, which utilizes the range-based attribute RSSI and the range-free attribute hopsize, to achieve accurate yet low-cost 3D localization. As anchor node deployment strategy plays an important role in improving the localization accuracy, an anchor node configuration scheme is also developed in this work by utilizing the MIS (maximal independent set) of a network. With proper anchor node configuration and propagation model selection, using simulations, we show that our proposed algorithm improves the localization accuracy by 38.9% compared with 3D DV-HOP and 52.7% compared with 3D centroid.

The big gamble: the need for a comprehensive research approach to understanding the causes and consequences of gambling harm in Australia

Problem gambling is now recognised as a major public health issue, with some gambling products posing significant burdens for individuals, families and communities. While gambling has attracted significant political and media attention, governments have been largely unwilling to implement a comprehensive approach to gambling reform. This article reviews the evidence base associated with gambling harm and advocates for a shift in focus away from initiatives that focus on responsible gambling, towards an approach that recognises the mutual obligation between industry, individuals, governments and the general community to engage in practices that prevent the development of gambling-related harm.