Research and application of reliability-based cost optimization method for constant interval preventive maintenance

Preventive maintenance is a means to ensure the component is kept in the desired state. Lack of preventive maintenance will cause unexpected consequences for the component, and too much preventive maintenance will result in unnecessary investment of resources. Based on the reliability data of the component, this paper establishes an analysis model to determine the optimal preventive maintenance interval of the component to make the cost of preventive and corrective maintenance lowest.

Dune(s): Fiction, history, and science on the Oregon coast

What connects the sci-fi book Dune with coastal dunes and geoengineering? The answer lies in humans and their world-making activities. This paper proposes an innovative approach to coastal dunes as hybrid environments by analyzing the dunes stabilization programs developed on the US Pacific Coast. It looks into the shifting sands of the Oregon coast and how they influenced Frank Herbert to write his novel, why local communities and federal authorities were interested in fixing the moving dunes and how these works ended up having unexpected consequences. It explores how human features acting as forcing mechanisms on beach-dune systems caused changes that turned into controlling influences in their own right, creating new environments and concerns. The paper ends with a reflection on how fiction and the history of dunes can be used to critically think about the anthropocentric hubris of building futures by geoengineering the planet for environmental repair.

Coronavirus and Immigration Detention in Europe: The Short Summer of Abolitionism?

In managing the coronavirus pandemic, national authorities worldwide have implemented significant re-bordering measures. This has even affected regions that had dismantled bordering practices decades ago, e.g., EU areas that lifted internal borders in 1993. In some national cases, these new arrangements had unexpected consequences in the field of immigration enforcement. A number of European jurisdictions released significant percentages of their immigration detention populations in spring 2020. The Spanish administration even decreed a moratorium on immigration detention and closed down all detention facilities from mid-spring to late summer 2020. The paper scrutinises these unprecedented changes by examining the variety of migration enforcement agendas adopted by European countries and the specific forces contributing to the prominent detention decline witnessed in the first months of the pandemic. Drawing on the Spanish case, the paper reflects on the potential impact of this promising precedent on the gradual consolidation of social and racial justice-based migration policies.

A PRACTICAL APPROACH TO MALWARE ANALYSIS

Malware analysis takes significant place at the intersection of incident response, forensics, and security monitoring, and system and network administration. The reason behind performing malware analysis is to extract information from a malware sample that can assist in responding to a malware incident. From a business perspective malware analysis is critical for saving valuable data of many organizations since the control of any IT system vulnerability in the wrong hands can have unexpected consequences. In this article we will cover general practical aspects and pre requirements needed for quick start in this area.

Interventions with Sticky Social Norms: A Critique

We study the consequences of policy interventions when social norms are endogenous but costly to change. In our environment a group faces a negative externality that it partially mitigates through incentives in the form of punishments. In this setting policy interventions can have unexpected consequences. The most striking is that when the cost of bargaining is high introducing a Pigouvian tax can increase output - yet in doing so increase welfare. An observer who saw that an increase in a Pigouvian tax raised output might wrongly conclude that this harmed welfare and that a larger tax increase would also raise output. This counter-intuitive impact on output is demonstrated theoretically for a general model and found in case studies for public goods subsidies and cartels.