Observations of First Occurrence and Severity of Potato Leafhopper, \u3ci\u3eEmpoasca Fabae\u3c/i\u3e (Harris), (Homoptera: Cicadellidae) in the North Central and Eastern United States.

This paper presents available data on the first occurrence dates and the damage severity of the potato leafhopper in the north central and north eastern United States collected during the past 47 years (1951-1997). The data were collected from a variety of sources including: potato leafhopper literature review; published reports; pest alerts; pest surveys; and delphi surveys. First occurrence and severity data show that the arrival time of potato leafhopper and subsequent damage severity varies substantially from year to year. A correlation analysis between date of first occurrence and severity of damage for Michigan, Minnesota, Wisconsin, the north central region and the northeastern region indicated no significant relationship between first arrival dates and damage severity. The lack of a relationship between the time of arrival of the migrant leafhopper and severity indicate that other factors, including frequency and magnitude of arrivals, weather conditions during the growing season and crop management contribute to the eventual severity of damage caused to crops by this migratory pest. The analysis of potato leafhopper severity data showed significant differences between years. There were no significant differences in severity among states within the north central region, indicating that potato leafhopper severity is a regional phenomenon

Observations of First Occurrence and Severity of Potato Leafhopper, \u3ci\u3eEmpoasca Fabae\u3c/i\u3e (Harris), (Homoptera: Cicadellidae) in the North Central and Eastern United States.

This paper presents available data on the first occurrence dates and the damage severity of the potato leafhopper in the north central and north eastern United States collected during the past 47 years (1951-1997). The data were collected from a variety of sources including: potato leafhopper literature review; published reports; pest alerts; pest surveys; and delphi surveys. First occurrence and severity data show that the arrival time of potato leafhopper and subsequent damage severity varies substantially from year to year. A correlation analysis between date of first occurrence and severity of damage for Michigan, Minnesota, Wisconsin, the north central region and the northeastern region indicated no significant relationship between first arrival dates and damage severity. The lack of a relationship between the time of arrival of the migrant leafhopper and severity indicate that other factors, including frequency and magnitude of arrivals, weather conditions during the growing season and crop management contribute to the eventual severity of damage caused to crops by this migratory pest. The analysis of potato leafhopper severity data showed significant differences between years. There were no significant differences in severity among states within the north central region, indicating that potato leafhopper severity is a regional phenomenon

Reaction kinetics of cinnamaldehyde hydrogenation over Pt/SiO2: comparison between bulk and intraparticle diffusion models

The liquid-phase hydrogenation of cinnamaldehyde over a Pt/SiO2 catalyst was investigated experimentally and theoretically. The experiments were conducted in a 300 cm3 stainless steel stirred batch reactor supplied with hydrogen gas and ethanol as a solvent. Five Langmuir–Hinshelwood kinetic models were investigated to fit the experimental data. The predictions from the bulk model were compared with predictions from the intraparticle diffusion model. Competitive and non-competitive mechanisms were applied to produce the main intermediate compound, cinnamyl alcohol. Reaction rate parameters for the different reaction steps were calculated by comparing between the experimental and mathematical models. All rate data utilized in the present study were obtained in the kinetic regime. The kinetic parameters were obtained by applying a nonlinear dynamic optimization algorithm. Nevertheless, the comparison between the methodology of the present model and these five models indicated that the non-competitive mechanism is more acceptable and identical with the single-site Langmuir–Hinshelwood kinetic model including mass transfer effects and it mimicked the reactant behavior better than the other models. In addition, the observed mean absolute error (MAE) for the non-competitive mechanism of the present model was 2.3022 mol/m3; however, the MAE for the competitive mechanism was 2.8233 mol/m3, which is an increase of approximately 18%. The prediction of the intraparticle diffusion model was found to be very close to that of the bulk model owing to the use of a catalyst with a very small particle size (<40 microns). Employing a commercial 5% Pt/SiO2 catalyst showed a result consistent with previous research using different catalysts, with an activation energy of ≈24 kJ/mol

Who is to blame for Autonomous Weapons Systems’ misdoings?

This Chapter analyses who (or what) should be held responsible for behaviours by autonomous weapons systems (AWS) that, were they enacted by a human agent, would qualify as internationally wrongful acts. After illustrating the structural problems which make ascription of responsibility for AWS’ activities particularly difficult, when not impossible, the alternative routes proposed to solve the ensuing responsibility gap will be assessed. The analysis will focus, in the first place, on the international criminal responsibility of the individuals who, in one way or another, are involved in the process of production, deployment and activation of the AWS. The possibility to hold the deploying State accountable for AWS’ wrongdoings will then be gauged. Subsequently, attention will be paid to the responsibility of the corporations manufacturing and/or programming the AWS. It will be observed that these options may solve some responsibility problems more effectively than critics of AWS are ready to admit. At the same time, it will be shown that, unless a no-fault liability regime is adopted, autonomy in weapons systems is bound to magnify the risk that no one may be held to answer for acts which are objectively in contrast with international legal prescriptions. Also, it will be argued that, given the complementary relationship among the various forms of responsibility under international law, proposals aimed at focusing solely on one of these at the expense of others are incapable of leading to satisfying results

Polyhydroxyalkanoate (PHA) bioplastics from organic waste

Polyhydroxyalkanoates (PHA) bioplastics, which are produced by pure and mixed culture biotechnology, are high-performance and truly biodegradable materials. The use of organic wastes as feedstocks for PHA production has been widely documented, though the focus has been on increasing PHA yield; knowledge of the resulting polymer quality and processability has been lacking. In this chapter, it is shown that copolymer composition, blend composition, thermal properties, molecular weight, type of processing and other characteristics such as microstructure and crystallisation kinetics all govern the mechanical properties, but property-structure relationships are complex, and therefore more research in this space is needed, regardless of the feedstock. Still, there is no doubt that organic wastes can be used as feedstocks for PHA production—particularly if they are pretreated—and there is now interest in commercialisation of PHA bioplastics from such wastes. But further advances are tempered with the conclusion that, for organic wastes to be viable feedstocks, the waste must be relatively abundant, concentrated and readily degradable. For some perspective, mass flows of organic wastewater streams from some relevant Australian industries are presented. It is shown that only if all the wastes from any given industry were collected and consolidated would there be sufficient feedstock for production of industrially relevant volumes of PHA

Incorporating human rights into the corporate domain: due diligence, impact assessment and integrated risk management

Business and human rights are often thought to be antithetical, but as societal expectations on companies have grown, it has become increasingly important for businesses to understand and act upon their legal and moral obligations to respect human rights. The authors of this paper begin by charting the evolution of the rights paradigm and its incorporation into the corporate sphere of influence. Second, the concept of human rights due diligence is examined, owing to its prominence in John Ruggie’s ‘Protect, Respect and Remedy’ framework. Human Rights Impact Assessments, as an emerging due diligence tool, warrant further attention, theorization and critique. Finally, it is suggested that human rights due diligence could be consolidated within existing corporate risk management systems. Reframing human rights in the context of social and business risks may provide a path forncompanies to understand the need for human rights due diligence by linking rights considerations with business concerns