The Planning and Adoption of a Merit Program for the Rush-Henrietta Central School

This paper outlines the planning and implementation of a merit-based evaluation program for the teachers at Rush-Henrietta Central School. Details include a history of teacher evaluation at Rush-Henrietta, committee formation, program chronology, and arguments opposed to the merit program. The author discusses the difficulties of defining merit-based evaluation and suggests a number of situations in which teachers may demonstrate merit, including in-service training, curriculum planning, and further education. He also presents alternatives to simplistic checklist evaluation. Appendices include news articles regarding teacher salaries, teacher salary schedules and promotion requirements, and assorted teacher evaluation forms

The Fate of Social Character in an Age of Uncertainty

This paper develops the longstanding sociological tradition of ‘character studies’ (Riesman, 1969 [1950]), arguing that the accelerated change and associated uncertainties central to late modern life have been accompanied by a new opportunity-directed form of individuality. Engaging with Sayer’s (2019) agenda-setting return to the subject, we acknowledge the ideological uses to which the promotion of this characterological form may be put, but argue that its core qualities can help suitably situated persons negotiate radical uncertainty via a reflexive, future-oriented commitment to agency. Despite the advantages of this orientation in the contemporary era, however, we conclude by suggesting that opportunity-directedness is associated with certain ‘pathologies’, involving psychological costs and social inequalities, that raise questions about its desirability and sustainability

The Influence of Formulation, Buffering, pH and Divalent Cations on the Activity of Endothall on Hydrilla.

Endothall has been used as an aquatic herbicide for more than 40 years and provides very effective weed control of many weeds. Early research regarding the mechanism-of-action of endothall contradicts the symptomology normally associated with the product. Recent studies suggest endothall is a respiratory toxin but the mechanism-of-action remains unknown. To further elucidate the activity of endothall, several endothall formulations were evaluated for their effects on ion leakage, oxygen consumption and photosynthetic oxygen evolution from hydrilla shoot tips. The influence of pH, buffering and divalent cations was also evaluated. (PDF contains 6 pages.

Droplet activation, separation, and compositional analysis: laboratory studies and atmospheric measurements [Discussion paper]

Droplets produced in a cloud condensation nucleus chamber as a function of supersaturation have been separated from unactivated aerosol particles using counterflow virtual impaction. Residual material after droplets were evaporated was chemically analyzed with an Aerodyne Aerosol Mass Spectrometer and the Particle Analysis by Laser Mass Spectrometry instrument. Experiments were initially conducted to verify activation conditions for monodisperse ammonium sulfate particles and to determine the resulting droplet size distribution as a function of supersaturation. Based on the observed droplet size, the counterflow virtual impactor cut-size was set to differentiate droplets from unactivated interstitial particles. Validation experiments were then performed to verify that only droplets with sufficient size passed through the counterflow virtual impactor for subsequent analysis. A two-component external mixture of monodisperse particles was also exposed to a supersaturation which would activate one of the types (ammonium sulfate) but not the other (polystyrene latex spheres). The mass spectrum observed after separation indicated only the former, validating separation of droplets from unactivated particles. Results from atmospheric measurements using this technique indicate that aerosol particles often activate predominantly as a function of particle size. Chemical composition is not irrelevant, however, and we observed enhancement of sulfate in droplet residuals using single particle analysis

Droplet activation, separation, and compositional analysis: laboratory studies and atmospheric measurements

Droplets produced in a cloud condensation nuclei chamber (CCNC) as a function of supersaturation have been separated from unactivated aerosol particles using counterflow virtual impaction. Residual material after droplets were evaporated was chemically analyzed with an Aerodyne Aerosol Mass Spectrometer (AMS) and the Particle Analysis by Laser Mass Spectrometry (PALMS) instrument. Experiments were initially conducted to verify activation conditions for monodisperse ammonium sulfate particles and to determine the resulting droplet size distribution as a function of supersaturation. Based on the observed droplet size, the counterflow virtual impactor cut-size was set to differentiate droplets from unactivated interstitial particles. Validation experiments were then performed to verify that only droplets with sufficient size passed through the counterflow virtual impactor for subsequent analysis. A two-component external mixture of monodisperse particles was also exposed to a supersaturation which would activate one of the types (hygroscopic salts) but not the other (polystyrene latex spheres or adipic acid). The mass spectrum observed after separation indicated only the former, validating separation of droplets from unactivated particles. Results from ambient measurements using this technique and AMS analysis were inconclusive, showing little chemical differentiation between ambient aerosol and activated droplet residuals, largely due to low signal levels. When employing as single particle mass spectrometer for compositional analysis, however, we observed enhancement of sulfate in droplet residuals

Modeling kinetic partitioning of secondary organic aerosol and size distribution dynamics: representing effects of volatility, phase state, and particle-phase reaction

This paper describes and evaluates a new framework for modeling kinetic gas-particle partitioning of secondary organic aerosol (SOA) that takes into account diffusion and chemical reaction within the particle phase. The framework uses a combination of (a) an analytical quasi-steady-state treatment for the diffusion–reaction process within the particle phase for fast-reacting organic solutes, and (b) a two-film theory approach for slow- and nonreacting solutes. The framework is amenable for use in regional and global atmospheric models, although it currently awaits specification of the various gas- and particle-phase chemistries and the related physicochemical properties that are important for SOA formation. Here, the new framework is implemented in the computationally efficient Model for Simulating Aerosol Interactions and Chemistry (MOSAIC) to investigate the competitive growth dynamics of the Aitken and accumulation mode particles. Results show that the timescale of SOA partitioning and the associated size distribution dynamics depend on the complex interplay between organic solute volatility, particle-phase bulk diffusivity, and particle-phase reactivity (as exemplified by a pseudo-first-order reaction rate constant), each of which can vary over several orders of magnitude. In general, the timescale of SOA partitioning increases with increase in volatility and decrease in bulk diffusivity and rate constant. At the same time, the shape of the aerosol size distribution displays appreciable narrowing with decrease in volatility and bulk diffusivity and increase in rate constant. A proper representation of these physicochemical processes and parameters is needed in the next generation models to reliably predict not only the total SOA mass, but also its composition- and number-diameter distributions, all of which together determine the overall optical and cloud-nucleating properties

Arbitrage, uncertainty and the new ethos of capitalism

This paper examines the arbitrageur as a figure who both embodies the new ethos of uncertainty central to ‘financialised’ capitalism, and exemplifies the issues of ethics and innovation raised by those who now personify what Weber called the ‘devotion to the calling of making money’. We begin by providing a brief background to financial ‘abstraction’ in the economy, and the issues of dissimulation with which this has been associated, before suggesting that engaging creatively with Weber’s writings can help us identify uncertainty as key to the character of contemporary financial decision-making. It is against this background that we analyse the arbitrageur as an ideal-type personality who embodies a newly abstract approach to capitalism. This approach is frequently portrayed as unethical, but we suggest it can be associated with an ethics of managing the unknown through an innovative commitment to overcoming limits that has consequences for human life in general

Edgework, Uncertainty and Social Character

This paper proposes a novel conceptual understanding of ‘edgework’ – a term denoting the voluntary embrace of risk - by drawing on the longstanding sociological tradition of character studies. In so doing, it addresses the paradox that while first-generation research into high-risk leisure suggested that these activities provided identity-affirming escapes from bureaucratized capitalism, second-generation writings argued that edgework exists in harmony with the norms of ‘risk societies’, raising questions about its continuing appeal. Developing a new analytical perspective with which to assess these views, we argue that the former studies should be understood in the context of challenges to ‘other-directed’ characterological forms prominent within the post-War era, while the latter signal the embodiment of edgework within emergent ‘opportunity-directed’ modalities of social character. This interpretation explains the enduring attractions of edgework alongside its changed social role, and also signals its utility as a prism through which to observe broader characterological changes

Hygroscopic Growth of Ammonium Sulfate/Dicarboxylic Acids

Recent studies have shown that tropospheric sulfate aerosols commonly contain 50% by mass organic species. The influence of these organics on the chemical and physical properties of sulfate aerosols is not fully established. We have measured the water activity of pure dicarboxylic acids and eutonic mixtures of ammonium sulfate/dicarboxylic acids at 25°C and have calculated van\u27t Hoff factors for each individual system. We have also used the vapor pressure data to determine the hygroscopic growth curves for pure dicarboxylic acids and eutonic mixtures and provide power law fits to the data. For the systems studied we find that the presence of soluble dicarboxylic acids at the eutonic proportion depresses hygroscopic growth when compared to pure ammonium sulfate. In addition, we find that the presence of low-solubility dicarboxylic acids at the eutonic proportion has no effect on the hygroscopic growth when compared to pure ammonium sulfate. To model the hygroscopic growth curves of the eutonic solutions, we employed the Zdanovskii, Stokes, and Robinson method. It was found that this approximation was accurate to within 17% for all the systems studied