A Survey on Blockchain for Information Systems Management and Security

Blockchain technologies have grown in prominence in recent years, with many experts citing the potential applications of the technology in regard to different aspects of any industry, market, agency, or governmental organizations. In the brief history of blockchain, an incredible number of achievements have been made regarding how blockchain can be utilized and the impacts it might have on several industries. The sheer number and complexity of these aspects can make it difficult to address blockchain potentials and complexities, especially when trying to address its purpose and fitness for a specific task. In this survey, we provide a comprehensive review of applying blockchain as a service for applications within today’s information systems. The survey gives the reader a deeper perspective on how blockchain helps to secure and manage today information systems. The survey contains a comprehensive reporting on different instances of blockchain studies and applications proposed by the research community and their respective impacts on blockchain and its use across other applications or scenarios. Some of the most important findings this survey highlights include the fact that blockchain’s structure and modern cloud- and edge-computing paradigms are crucial in enabling a widespread adaption and development of blockchain technologies for new players in today unprecedented vibrant global market. Ensuring that blockchain is widely available through public and open-source code libraries and tools will help to ensure that the full potential of the technology is reached and that further developments can be made concerning the long-term goals of blockchain enthusiasts.     

Mastic Production in Medieval Chios: Economic Flows and Transitions in an Insular Setting

ABSTRACT

The Aegean island of Chios provides a special case of insularity during the Middle Ages, aspects of which are reflected in the production of a highly-valued product, mastic resin, which was sought after across the Mediterranean world for use in medicine, fragrances and flavourings. Produced only on the island, high-quality mastic became an iconic Chian product that highlighted the island’s uniqueness and significantly contributed to its economy. This article presents a diachronic view of mastic production in and circulation from Chios during the periods of Roman, Byzantine and Genoese rule. The widespread demand for its luxury commodity meant that the island was always active in the wider maritime networks in this period. The lens of mastic production makes these connections visible in textual, archaeological and architectural evidence that highlights the role local products played in the ways islands, like Chios, navigated the economic and political transitions of the medieval Mediterranean world.     

Parental Involvement Moderates Etiological Influences on Attention Deficit Hyperactivity Disorder Behaviors in Child Twins

Although few would now contest the presence of Gene × Environment (G × E) effects in the development of child psychopathology, it remains unclear how these effects manifest themselves. Alternative G × E models have been proposed (i.e., diathesis–stress, differential susceptibility, bioecological), each of which has notably different implications for etiology. Child twin studies present a powerful tool for discriminating between these models. The current study examined whether and how parental involvement moderated etiological influences on attention deficit hyperactivity disorder (ADHD) within 500 twin pairs aged 6–11 years. Results indicated moderation of genetic and nonshared environmental contributions to ADHD by parental involvement, and moreover, suggested both differential susceptibility and bioecological models of G × E. Results highlight the utility of child twin samples in testing different manifestations of G × E effects.