Fifty years of atrazine in Iowa: Benefits, impacts, and current status

Atrazine was first registered for use in the U.S. in 1958. It quickly became the preferred herbicide of corn growers, controlling both grasses and broadleaf weeds and being used either as a postemergence or preemergence application, unlike the primary alternative herbicide of the time, 2,4-D (Muller 2008). Over 50 years later, atrazine is still an important weed management tool for corn growers, and was the most widely used herbicide until recently when only glyphosate was used on more acres

Flashback to 1985: The State of Speech and Debate: A National Perspective

Since I left Minnesota to join the staff at the National Federation of State High School Associations as their speech and music coordinator in July 1978, a number of forces have impacted America’s high schools, high school activities programs, and more specifically, high school speech and debate activities. I should like to focus on some of these forces tracing their eventual impact on speech and debate programs

Growing green?: co-creating an evidence-based model of SME engagement

Topic: This paper reports on our experiences in running a pilot ESRC Impact Acceleration Account (IAA) project that addresses the issue of ‘sustainable growth’ by engaging SME owners and managers in facilitated workshop discussions on this important, yet highly contested topic. If the UK and other countries are to meet their carbon reduction obligations, it is clear that SMEs will need to make significant, and in some cases radical changes, not only in terms of their day-to-day operational practices but also in their longer-term trajectories. However, policymakers face substantial obstacles in communicating with this audience, including: the scale and diversity of the SME population, competing priorities, competitive pressures and resource constraints. This project combines published research on SMEs, their growth processes and environmental behaviours, with specialist expertise in SME engagement and climate change communication. Aim: The multi-partner collaboration is designed to co-create new knowledge on environmentally sustainable growth in SMEs. Its primary aim is to help SMEs and intermediaries gain a better understanding of sustainable growth and its implications for their businesses. The team designed and trialled an innovative approach engagement, based on facilitated workshop discussions, creating an initial evidence base that will be coupled with a set of practical recommendations. The project builds on the academic and external partners’ complementary research insights into SMEs, organisational growth, climate change communication, energy use and associated policy-making. By incorporating the expertise of the practical insights of practitioners and intermediary organisations, the project seeks to initiate a vigorous knowledge exchange about the conceptualisation and practical application of sustainable growth. Methodology: Prior to engaging with SMEs, the team conducted a review of the literature on sustainable growth, which informed the engagement phase of the project. We also conducted a small survey of SME owners and managers and engaged in an informal consultation with stakeholders that informed the design and contents of the pilot workshops. Two half-day workshops were organised with SME owner and manager participants, facilitated by the communications specialists, Climate Outreach, and drawing on previous engagement projects with hard to reach groups. The workshops provided a forum for participants to engage in grounded, ‘peer to peer’ discussion about sustainable growth, expressed in their own terms and drawing on their own values and narratives. Audio recording of the workshops provided the basis for a thematic analysis, which has been combined with the other sources to construct this working paper. Contribution: The project is generating new insights into SME perspectives on sustainable growth that are grounded in relevant theory and evidence, coupled with practical tools that will be of value to practitioners and policymakers. The project team has also developed audio-visual resources, which will be used to raise awareness and help to provide the foundations for future engagement activity. The aim of the next phase of the project is to further refine this approach to engagement in the form of a more fully developed ‘toolkit’ and associated resources

Scottish medieval Parish churches: The evidence from the Dioceses of Dunblane and Dunkeld

The great majority of Scottish parish churches owe their present appearance to reconstructions carried out from the later eighteenth or nineteenth centuries. It was the view of the authors of this paper, however, that in many cases those reconstructions had been relatively superficial, and that medieval work might have survived under what could, in some cases, be little more than a modern veneer. To test this view, a survey was carried out of all medieval parish sites within the dioceses of Dunblane and Dunkeld. The findings from that survey are summarized in this paper

Exploring the past with Google Cardboard

Combining digital reconstruction with mobile technologies has the potential of enriching visitors experience to historic sites. Through designing a mobile App with Google Cardboard it is possible to use technology already in peoples' pockets to provide immersive on-site exploration of historic sites. This paper looks at our experience in developing such a mobile App which acts as a digital guided tour of the remains of St Andrews Cathedral. The App brings together traditional media such as audio, images, panoramas, 3D video and 4π Steradian (or 360°) video with a mobile smartphone and Google Cardboard to provide a tour of one of Scotland's most important historic sites. The mobile App is available from both Google Play and iTunes, providing direct delivery to a potential audience of millions. It complements the location-aware mediaeval St Andrews App, which provides a guided tour to the town of St Andrews as a whole. In the absence of Google Cardboard the App is still useful providing both visual content and audio commentary on this historic monument.Postprin

Emerging models of environmentally sustainable enterprise: a comparative study of low-energy housing retrofit organisations in the UK and France.

Objectives: This paper examines emerging models that are being adopted by organisations engaged in the low carbon transition, with a particular focus on the role played by social enterprises. It presents a case-based comparison of recent efforts by industry actors in the housing retrofit supply chain to deliver low-energy retrofits (or refurbishments) of existing housing stocks in the UK and France. Prior Work: The study adopts a multi-disciplinary approach which makes connections between three broad strands of research: (1); energy policy, with a focus on energy efficiency in buildings (e.g. Fawcett and Mayne 2012); (2) social and sustainable enterprise (e.g. Blundel et al. 2013, Gibbs and O’Neill 2012); (3) socio-technical transitions (e.g. Geels and Kemp 2006; Smith 2007, Killip 2013). Approach: The issues are examined through a comparative study of the low-energy housing retrofit policy environment and of current organisational structures and practices in the building industries of the UK and France. Industry responses to recent policy signals are explored in case materials that are based around reviews of published evidence and a series of semi-structured interviews with designers and contractors who have direct experience of innovative, low-energy refurbishment projects in each country. Results: The case study evidence suggest that while the two countries have comparable long-term policy goals for CO2 emissions reduction, there are important organisational differences displayed in the more immediate initiatives being undertaken by industry actors involved in delivering retrofitting of the housing stock. The discussion section indicates possible explanations for these differences and highlights issues requiring further investigation. Implications: The transition towards a more environmental sustainable residential housing depends largely on social, as opposed to technological, innovation. Policy-makers need to address specific organisational constraints, including the longstanding fragmentation evident in this part of the UK building industry. The cases suggest that there is considerable scope for reconfiguring traditional networks and for giving greater emphasis to collaborative arrangements involving private sector firms, social and community based enterprise. Value: The study provides new empirical insights into the organisational dimensions of an important sustainability transition. It also makes a contribution to theoretical development by combining insights from several distinct disciplines, and by applying concepts from energy research, organisational studies, social entrepreneurship and socio-technical transitions to recent development in the UK and French building industries. It also identifies several implications for future research policy and practice

Review of Atrazine Water Monitoring Data in Iowa Relative to Label and Management Changes

Trends in atrazine detections and concentrations in Iowa surface and groundwater were reviewed relative to adoption of Best Management Practices and atrazine label changes designed to protect water resources. Analysis of a large statewide water monitoring database from 1982 to 1995 revealed statistically significant declines in both atrazine detection rates and concentrations in both groundwater and surface water. USGS monitoring of streams from 1989 to 1995 showed a decline in atrazine median concentration of almost 50%. Rural wells in Floyd and Mitchell Counties were sampled in 1986 and 198 7 and resampled in 1994, four years after the area was designated as an atrazine management area. Mean atrazine concentrations declined by 87%, and no wells exceeded the atrazine Maximum Contaminant Level (MCL) drinking water standard (6% of wells exceeded the MCL in 1986). Other studies also documented declines in atrazine detections and concentrations, which have been attributed to improved management of the herbicide. Exposure of Iowans to atrazine through drinking water is low. For the period 1994-2002, eleven Community Water Systems (CWS) utilizing the most vulnerable surface water sources were intensively monitored for atrazine. Only one CWS in one year exceeded the 3 ppb annual average drinking water standard. In an analysis of all Safe Drinking Water compliance monitoring in Iowa for the period 1993 through 2000, no CWS utilizing groundwater had an atrazine detection of 3 ppb or greater. No atrazine was detected in 90.2% of groundwater

Regional Regulation of Purkinje Cell Dendritic Spines by Integrins and Eph/Ephrins.

Climbing fibres and parallel fibres compete for dendritic space on Purkinje cells in the cerebellum. Normally, climbing fibres populate the proximal dendrites, where they suppress the multiple small spines typical of parallel fibres, leading to their replacement by the few large spines that contact climbing fibres. Previous work has shown that ephrins acting via EphA4 are a signal for this change in spine type and density. We have used an in vitro culture model in which to investigate the ephrin effect on Purkinje cell dendritic spines and the role of integrins in these changes. We found that integrins α3, α5 and β4 are present in many of the dendritic spines of cultured Purkinje cells. pFAK, the main downstream signalling molecule from integrins, has a similar distribution, although the intenstity of pFAK staining and the percentage of pFAK+ spines was consistently higher in the proximal dendrites. Activating integrins with Mg2+ led to an increase in the intensity of pFAK staining and an increase in the proportion of pFAK+ spines in both the proximal and distal dendrites, but no change in spine length, density or morphology. Blocking integrin binding with an RGD-containing peptide led to a reduction in spine length, with more stubby spines on both proximal and distal dendrites. Treatment of the cultures with ephrinA3-Fc chimera suppressed dendritic spines specifically on the proximal dendrites and there was also a decrease of pFAK in spines on this domain. This effect was blocked by simultaneous activation of integrins with Mn2+. We conclude that Eph/ephrin signaling regulates proximal dendritic spines in Purkinje cells by inactivating integrin downstream signalling