Safe storage of dilute ethylene oxide mixtures in water

In the past industry has had to rely on a number of “rules of thumb” to provide a means of reasonable analysis for many design, operation, safety and similar issues. The lack of readily available computing facilities made the use of “rules of thumb” a necessary part of doing business in the hydrocarbon processing industry. And these “rules of thumb” have proven useful and allowed many tasks to be accomplished successfully. Today, however, availability of mainframe computers or desktop computing facilities has provided a tool that has decreased the need to rely on “rules of thumb.” And in many cases processing improvements can only be accomplished by replacing “rules of thumb” with more rigorous analysis. In the ethylene oxide producing/consuming industry a widely-used “rule of thumb” concerns the storage of ethylene oxide water solutions. A well-publicized “rule” stated that solutions in excess of 1-2 weight percent ethylene oxide in water should not be stored [1]. This “rule” is certainly valid in many situations. However, this guideline may be unnecessarily restrictive in other cases. The impact of several key process parameters impacts the amount of ethylene oxide in water than can be safely stored. This study will show that higher concentrations of ethylene oxide in water can be safely stored under the right circumstances. The study will also discuss the key variables that determine whether aqueous ethylene oxide solutions can be safely stored. Finally, a methodology used in determining how much ethylene oxide in water can be safely stored will be outlined.     

Research engagement,impact and sustainable tourism

In this editorial, we reflect on how the Journal of Sustainable Tourism can contribute towards sustainable tourism researchers achieving more impact with their research. We propose some changes that can be tested in, and introduced gradually and collaboratively with, the community of the editorial board and authors. To support impactful mind sets, we will promote research that reflects diverse academic communities. To promote impactful research topics, we will encourage authors to frame their submitted articles against the Sustainable Development Goals, while research that is time sensitive will be fast tracked so it can contribute to current debates. To promote impactful methodologies, we shall favour articles that use mixed methods and action research, and those that conduct longitudinal, experimental, and evaluative research. To promote impactful partnerships, we will favour multidisciplinary approaches and research that has been co-created with stakeholders. To promote impactful communication and dissemination, we will continue to build an online community on social media for sustainable tourism researchers, we will promote articles in social media to raise their visibility, and we will provide free access to those articles that are deemed to have the greatest potential to impact positively on society.     

Evaluating Consumer Preferences for Organic Food Production Standards

In 21st century agriculture, standards are increasingly used to define new food products, such as organic food and fair trade. In some cases these standards are privately determined but in other cases they have been established by governments. Indeed, the Government of Canada recently announced its organic food regulations. A key dimension of the policy process involves choosing which standards are to be used to govern the production of organic food. Unfortunately, decision makers faced with these choices know very little about how the public values the various standards that could be used to define organic. This study evaluates Canadian consumers' preferences for different organic standards. Standards pertaining to pesticide‐residue testing, product origin specifications, the standard setting agency, and standard monitoring agency are evaluated using a conjoint method. Key results suggest that consumers place a high value on a pesticide standard that involves regular testing of the end product and that they prefer an organic food standard to include a rule that limits where the good is produced. En agriculture en ce 21^e siècle, des normes sont de plus en plus utilisées pour définir de nouveaux produits alimentaires tels que les aliments biologiques et les aliments issus du commerce équitable. Dans certains cas, ces normes sont établies par des organismes privés, et dans d'autres cas, elles sont établies par les gouvernements. Dernièrement, le gouvernement du Canada a annoncé son Règlement sur les produits biologiques. Un élément clé du processus d'élaboration des politiques consiste à choisir les normes qui s'appliqueront à la production d'aliments biologiques. Malheureusement, les décideurs à qui reviennent ces choix en savent très peu sur les valeurs que le public accorde aux diverses normes qui pourraient être utilisées pour définir le terme «biologique». La présente étude évalue les préférences des consommateurs canadiens concernant les diverses normes sur les produits biologiques. Les normes sur l'analyse des résidus de pesticides, les spécifications sur l'origine du produit, les organismes de normalisation et les organismes de surveillance sont évaluées à l'aide d'une méthode conjointe. Les résultats fondamentaux montrent que les consommateurs accordent une grande importance à une norme sur les pesticides qui exige des analyses régulières du produit final et qu'ils préfèrent une norme sur les aliments biologiques qui inclut un règlement sur l'origine du produit.     

Stochastic efficiency analysis with risk aversion bounds: a correction

A recent paper by Hardaker et al. (The Australian Journal of Agricultural and Resource Economics, 48, 2004a, 253) and book by Hardaker et al. (Coping with Risk in Agriculture, 2004b) describe a procedure for determining an efficient set from among a set of random alternatives. This procedure, called stochastic efficiency with respect to a function (SERF), is claimed to make the same assumption concerning the risk aversion measures as does stochastic dominance with respect to a function (SDRF). This is claim is incorrect. SERF imposes an additional requirement on the risk aversion measures of the decision makers. Both procedures assume a lower and an upper bound on risk aversion, but SERF also assumes that all risk aversion measures are of the same functional form as these lower and upper bound functions. This additional strong requirement on risk preferences implies that the efficient set identified under SERF is usually smaller than that identified using SDRF.     

Chefs and suppliers: An exploratory look at supply chain issues in an upscale restaurant alliance

This paper examines some basic issues associated with supply chains in the context of acquiring local ingredients as part of producing a culinary tourism experience. Based on data collected from Executive Chefs at Relais & Châteaux restaurants through surveys and personal interviews, the authors document producer-to-chef relationships, why and how local ingredients are featured in menu listings, and how chefs communicate their use of local ingredients to their guests. The results also describe chefs’ beliefs about the use of local ingredients, as well as potential issues related to the use of suppliers and their perceptions of their guests’ expectations for their meals.     

Which Elasticity? Estimating the Responsiveness of Taxpayer Reporting Decisions

In this paper we present estimates of the responses of individuals to marginal tax rates in their reporting of income, using data from individual tax returns for the year 1995. One estimation method is ordinary least squares regression. A second method uses quantile regression, which provides evidence on behavioral responses at different points (or quantiles) in the distribution of income and so is relevant to the question of whether the responses of, say, the rich differ from those at other points in the income distribution. Our results clearly indicate that marginal tax rates affect the reporting decisions of individuals. However, there are significant differences in the marginal tax rate reporting responses for the various types of reported income, there are major differences across income classes, and there are notable differences in the estimated responses across estimation methods.

Do Community Supported Agriculture programmes encourage change to food lifestyle behaviours and health outcomes? New evidence from shareholders

Community Supported Agriculture (CSA) programmes have recently received attention for their potential to influence food lifestyle behaviours and health outcomes, though studies have mostly drawn from small samples (n?t-tests assess if paired means are statistically different, and multiple regressions of paired differences on socioeconomic factors, self-reported health, and years of CSA enrolment estimate the effect of respondent characteristics on behaviour change. The results strongly suggest that CSAs have the potential to positively impact shareholders’ food lifestyle behaviours and health outcomes, and that those reporting ‘poor health’ prior to CSA enrolment exhibited the most change overall. These results should be taken as an initial, yet promising, analysis of the impact of CSA participation on shareholder food lifestyle behaviours and health outcomes.     

Assessing the growth-inducing impact of the Appalachian Development Highway System in southern Ohio: Did policy promote change?

The concept of “inducing growth” is typically considered an adverse consequence of a project on the land use system. In certain instances, however, the desire to induce growth and foster land use change is a focus of land use policy. Such is the example of the Appalachian Highway Development System (AHDS) program initiated by the Appalachian Regional Commission (ARC) during the late 1960s. With the goal of providing highway infrastructure to improve assess to a geographically isolated and historically impoverished region, the ADHS has added nearly 3000 miles of highway to the Appalachian landscape. The degree to which highway investment has contributed to regional growth remains a controversial point and tractable methods to quickly assess landscape change given a project of this magnitude are elusive. In this paper a portion of the AHDS trending through southern Ohio is examined using data acquired from the Landsat series of satellites. Beginning with a pre-highway condition in 1976, a 26 year time horizon, concluding in 2002, was analyzed based on a post-classification change detection methodology. Results of this investigation revealed slight, yet significant, levels of urban expansion within a 10 km corridor along the path of AHDS Corridor D/State Route 32. Beyond this buffer zone the land use system evidenced more stability, suggesting that as distance increased from Corridor D/State Route 32, reduced accessibility also reduced the attractiveness of land for urban uses. Relating these results back to the infrastructure investment policies of the ARC demonstrates that growth did result from the construction of Corridor D and supports previous findings that land development based on highway construction is extremely time-sensitive.