Determination of propylenethiourea and related compounds by HPLC

Propylenethiourea (4-methylimidazolidine-2-thione) is the major breakdown product of Propineb, a fungicide of the propylenebisditiocarbamate group. The degradation pattern of Propineb is analagous to those of ethylenebisdithiocarmabates which give ethylenethiourea as the principal metabolite. This compound has been reported to possess a carcinogenic activity. [Continues.

Interoperability in Open IoT Platforms: WoT-FIWARE Comparison and Integration

The rapid and exponential growth of the Internet of Things (IoT) has been generating a new breed of technologies that introduce several different protocols and interfaces. The Web of Things (WoT) architecture stands out as an emerging and poten- tial solution to improve interoperability across IoT platforms by describing well-defined software interfaces. However, few studies analyze and compare WoT to other interoperability solutions proposed in the IoT literature. In this paper, we attempt to bridge the gap by three main contributions. First, we qualitative compare the WoT approach with the well-known FIWARE- based interoperability solution.Second, based on the previous analysis, we design and implement a connector to bridge the WoT architecture to the FIWARE ecosystem. Third, we conduct a performance analysis emulating a real IoT-based environment to understand scalability, response time, and computer resource usage of the two interoperability solutions. The results reveal that conceptual design choices impact the applications’ performance: the WoT architecture effectively enables interoperability across IoT Platforms, though it incorporates several characteristics that hinder the implementation of applications. On the other hand, the FIWARE IoT Agent solution is platform-specific. Hence new implementations are needed for each different IoT data model

Pharmaceutical Creep: U.S. Military Power and the Global and Transnational Mobility of Psychopharmaceuticals

In 2006, the United States Department of Defense developed for the first time official criteria for the use of psychopharmaceuticals “in theater”—in the physical and tactical spaces of military operations including active combat. Based on fieldwork with Army soldiers and veterans, this article explores the transnational and global dimensions of military psychopharmaceutical use in the post‐9/11 wars. I consider the spatial, material, and symbolic dimensions of what I call “pharmaceutical creep”—the slow drift of psychopharmaceuticals from the civilian world into theater and into the military corporate body. While pharmaceutical creep is managed by the U.S. military as a problem of gatekeeping and of supply and provisioning, medications can appear as the solution to recruitment and performance problems once in theater. Drawing on soldiers’ accounts of medication use, I illuminate the possibilities, but also the frictions, that arise when routine psychopharmaceuticals are remade into technologies of global counterinsurgency

Estimating Properties of Flow Statistics using Bootstrap

Traffic measurement has been gaining increasing attention of the network community in the last years, due to its application in a variety of important areas, such as traffic engineering and network planning. Much effort has been devoted to passive flow measurement since collecting packet-level information in high speed links makes this process extremely complex and expensive. There are some techniques for dealing with flow statistics in current commercial routers and associated measurement infrastructure. However, even though flow-level information is more compact than packet-level information, transmitting and storing it would still impose a significant burden on the operation of a typical Internet Service Provider (ISP). In this paper, we advocate that only a small portion of the flow records need to be preserved for further processing. We propose the use of the Bootstrap resampling technique for deriving statistical properties from a previously preprocessed sampled set of flows. Our results show that only 10 % or less of the original sampled statistics is necessary in order for Bootstrap to reconstruct the main characteristics of the original raw flow records. Key words Network Traffic Measurement; Sampling Technique