Modelling the demographic impact of HIV/AIDS in South Africa and the likely impact of interventions

This paper describes an approach to incorporating the impact of HIV/AIDS and the effects of HIV/AIDS prevention and treatment programmes into a cohort component projection model of the South African population. The modelled HIV-positive population is divided into clinical and treatment stages, and it is demonstrated that the age profile and morbidity profile of the HIV-positive population is changing significantly over time. HIV/AIDS is projected to have a substantial demographic impact in South Africa. Prevention programmes - social marketing, voluntary counselling and testing, prevention of mother-to-child transmission and improved treatment for sexually transmitted diseases - are unlikely to reduce AIDS mortality significantly in the short term. However, more immediate reductions in mortality can be achieved when antiretroviral treatment is introduced.antiretroviral treatment, demographic impact, HIV/AIDS prevention, simulation model, South Africa

Forensic Attacks Analysis and the Cyber Security of Safety-Critical Industrial Control Systems

Industrial Control Systems (ICS) and SCADA (Supervisory Control And Data Acquisition) applications monitor and control a wide range of safety-related functions. These include energy generation where failures could have significant, irreversible consequences. They also include the control systems that are used in the manufacture of safety-related products. In this case bugs in an ICS/SCADA system could introduce flaws in the production of components that remain undetected before being incorporated into safety-related applications. Industrial Control Systems, typically, use devices and networks that are very different from conventional IP-based infrastructures. These differences prevent the re-use of existing cyber-security products in ICS/SCADA environments; the architectures, file formats and process structures are very different. This paper supports the forensic analysis of industrial control systems in safety-related applications. In particular, we describe how forensic attack analysis is used to identify weaknesses in devices so that we can both protect components but also determine the information that must be analyzed during the aftermath of a cyber-incident. Simulated attacks detect vulnerabilities; a risk-based approach can then be used to assess the likelihood and impact of any breach. These risk assessments are then used to justify both immediate and longer-term countermeasures

From Coalition to Commons: Plan S and the Future of Scholarly Communication

Abstract The announcement of Plan S in September 2018 triggered a wide-ranging debate over how best to accelerate the shift to open access. The Plan’s ten principles represent a call for the creation of an intellectual commons, to be brought into being through collective action by funders and managed through regulated market mechanisms. As it gathers both momentum and critics, the coalition must grapple with questions of equity, efficiency and sustainability. The work of Elinor Ostrom has shown that successful management of the commons frequently relies on polycentricity and adaptive governance. The Plan S principles must therefore function as an overarching framework within which local actors retain some autonomy, and should remain open to amendment as the scholarly communication landscape evolves

Dysfunctional Warfare: The Russian Invasion of Ukraine

Russia’s invasion of Ukraine was based on false premises, faulty assumptions, and a weak strategy. As the conflict has unfolded, heavy losses have imposed a strain on available Russian manpower. The Russian army reached a culminating point outside Kyiv and has exhibited little sign of operational learning. By contrast, Ukrainians have fought an existential war, making good use of dispersed light infantry tactics with high motivation levels. Western support has allowed them to compensate for their deficiencies in armaments and munitions. This commentary also shows military and policy leaders how the political context continues to impose limitations on the Ukrainians

From Coalition to Commons: Plan S and the Future of Scholarly Communication

Abstract The announcement of Plan S in September 2018 triggered a wide-ranging debate over how best to accelerate the shift to open access. The Plan’s ten principles represent a call for the creation of an intellectual commons, to be brought into being through collective action by funders and managed through regulated market mechanisms. As it gathers both momentum and critics, the coalition must grapple with questions of equity, efficiency and sustainability. The work of Elinor Ostrom has shown that successful management of the commons frequently relies on polycentricity and adaptive governance. The Plan S principles must therefore function as an overarching framework within which local actors retain some autonomy, and should remain open to amendment as the scholarly communication landscape evolves

Retirees Look Back on the Years

Professors Howard Leichter, Linda Olds and Kareen Sturgeon share memories of their years at Linfield