Manganese Geochemistry and Plant Availability in Response to Agricultural Practices

Manganese (Mn) is an essential micronutrient for all organisms. In soils, Mn forms determine availability to plants. Most Mn research has been conducted in forest ecosystems and Mn cycling in agricultural systems is understudied. Therefore, the objective of the experiment is to understand the effect of different agricultural management strategies on Mn cycling and plant availability. First, a greenhouse experiment was conducted to determine the effect of different application rates of two Mn fertilizers (MnSO4 and MnEDTA) on soil geochemical properties and growth of corn (Zea mays) and soybean (Glycine max). The fertilizers were applied to soil at three different rates (Recommended, 10x, and 50x). Second, a field experiment was conducted to investigate the effects of contrasting land-use systems (Organic and Conventional Agriculture, Unmanaged Forest) on soil geochemical properties and Mn availability. For both experiments, soil analysis included a sequential extraction to understand the distribution of plant available and stabilized Mn. Plant uptake of Mn and other nutrients was measured in the greenhouse experiment. In the greenhouse experiment, both fertilizer types increased available Mn in the soybean group. However, there was only an increase in plant uptake in the MnSO4 treatment. The MnEDTA treatment decreased Mn uptake with increased Mn application, likely due to competition with Fe. Overall, MnSO4 has a stronger effect on plant Mn uptake and Mn cycling than MnEDTA. The field experiment showed depleted available Mn levels in the agricultural systems relative to the unmanaged system. Additionally, available Mn forms had a positive relationship with SOC, while unavailable forms had a negative relationship

Container Culture: an Educational Program To Reduce the Overuse

The increased pace of society, improved safety, mobility and the need for parent efficiency have created a vast market of infant products to meet these demands: car seats that clip in and out of everything from the car to the grocery cart, jumpers, walkers, exersaucers, swings, bouncers and bumbos. These infant equipment products are helpful and can be beneficial if used effectively, however, the problem synthesized from the literature and clinical observation is that these containers designed to support safety and mobility are being overused causing a decrease in tummy time and human interaction which is leading to delays in healthy infant motor development. This project developed an educational program to inform at- risk parents in the community of the potentially negative effects of consistent infant equipment use, its effect on development and offer solutions for promoting appropriate developmental play skills to use in place of pacifying through container play. Infant containers were defined as car seats, jumpers, walkers, exersaucers, swings bouncers and bumpo seats. The outcomes of the program were measured through pre/post program surveys, parent time study of container use completed in their home setting; monitoring types of equipment used, time of day used and amount of time used

Use of an Extracorporeal Femoral-carotid Shunt in the Management of Complex Supra-aortic Disease

AbstractManagement of symptomatic multifocal supra-aortic atherosclerotic disease presents a complex surgical challenge. We describe a novel approach where a temporary extra-corporeal femoro-carotid shunt was used to maintain cerebral perfusion during hybrid surgical and endovascular treatment for tandem supra-aortic lesions

Planning for the Sun to Come Up: How Nevada and California Explain the Future of Net Metering

This Article explores the growth of rooftop solar and the future of net metering through the debates and policies of Nevada and California. Part II details the recent, rapid growth and projected future growth of solar power in the United States. Part II also describes how Nevada and Californiaare leading the nation in utilization of solar power and are already addressing issues that are likely to emerge in other areas of the country. Part III begins with a brief introduction to net metering and the national scope of net metering program reviews. Part III concludes with a summary of the most recent changes to each states net metering laws. Part IV contains a comparative analysis of five key legislative and regulatory factors influencing how net metering will develop in the future. The elements are the interaction between renewable portfolio standards and net metering programs, solar photovoltaic (PV) incentive programs, time-of-use rates, electricity sector decoupling, and comprehensive electric grid planning. Part V summarizes key findings from our research and provides lessons learned for other states considering evolving their net metering programs. Part VI concludes this article with a forward-looking assessment of the challenges facing net metering

Estimation of the Health Impact and Cost-Effectiveness of Influenza Vaccination with Enhanced Effectiveness in Canada

INTRODUCTION: The propensity for influenza viruses to mutate and recombine makes them both a familiar threat and a prototype emerging infectious disease. Emerging evidence suggests that the use of MF59-adjuvanted vaccines in older adults and young children enhances protection against influenza infection and reduces adverse influenza-attributable outcomes compared to unadjuvanted vaccines. The health and economic impact of such vaccines in the Canadian population are uncertain. METHODS: We constructed an age-structured compartmental model simulating the transmission of influenza in the Canadian population over a ten-year period. We compared projected health outcomes (quality-adjusted life years (QALY) lost), costs, and incremental cost-effectiveness ratios (ICERs) for three strategies: (i) current use of unadjuvanted trivalent influenza vaccine; (ii) use of MF59-adjuvanted influenza vaccine adults ≥65 in the Canadian population, and (iii) adjuvanted vaccine used in both older adults and children aged < 6. RESULTS: In the base case analysis, use of adjuvanted vaccine in older adults was highly cost-effective (ICER = $2111/QALY gained), but such a program was "dominated" by a program that extended the use of adjuvanted vaccine to include young children (ICER =$1612/QALY). Results were similar whether or not a universal influenza immunization program was used in other age groups; projections were robust in the face of wide-ranging sensitivity analyses. INTERPRETATION: Based on the best available data, it is projected that replacement of traditional trivalent influenza vaccines with MF59-adjuvanted vaccines would confer substantial benefits to vaccinated and unvaccinated individuals, and would be economically attractive relative to other widely-used preventive interventions

A field study of team working in a new human supervisory control system

This paper presents a case study of an investigation into team behaviour in an energy distribution company. The main aim was to investigate the impact of major changes in the company on system performance, comprising human and technical elements. A socio-technical systems approach was adopted. There were main differences between the teams investigated in the study: the time of year each control room was studied (i.e. summer or winter),the stage of development each team was in (i.e. 10 months), and the team structure (i.e. hierarchical or heterarchical). In all other respects the control rooms were the same: employing the same technology and within the same organization. The main findings were: the teams studied in the winter months were engaged in more `planning’ and `awareness’ type of activities than those studies in the summer months. Newer teams seem to be engaged in more sharing of information than older teams, which maybe indicative of the development process. One of the hierarchical teams was engaged in more `system-driven’ activities than the heterarchical team studied at the same time of year. Finally, in general, the heterarchical team perceived a greater degree of team working culture than its hierarchical counterparts. This applied research project confirms findings from laboratory research and emphasizes the importance of involving ergonomics in the design of team working in human supervisory control

Building and Maintaining LGBTQ+ Picture Book Collections

The LGBTQ+ community has had to continuously fight for their rights, including their right to be represented in the library. This toolkit provides instruction on how to develop and manage a library collection of LGBTQ+ children’s picture books. It is split into four sections that include a guide to evaluating materials, recommended picture books, a guide to fighting censorship, and a list of recommended resources

Electromyographical Comparison of a Traditional, Suspension Device, and Towel Pull-Up

Strengthening muscles of the back may have various implications for improving functions of daily living, aiding in the transfer of power in throwing, and assist in injury prevention of the shoulder complex. While several versions of the pull-up exist, there is currently no literature comparing their differences. The purpose of this investigation was to compare the electromyographical activity of the latissimus dorsi, posterior deltoid, middle trapezius, and biceps brachii while performing three variations of the pull-up. Resistance-trained men and women (n = 15, age = 24.87 ± 6.52 years) participated in this study by performing traditional pull-ups, suspension device pull-ups, and towel pull-ups in a randomized fashion. Each pull-up was performed for three repetitions with a 1.5 bi-acromial grip-width for each participant. Normalized (%MVC) electromyographical values were recorded for each muscle group during each pull-up variation. No significant differences existed within the latissimus dorsi, biceps brachii or posterior deltoid between any of the exercises. For the middle trapezius, towel pull-ups provided significantly lower muscle activity than the traditional pull-up, while no differences between suspension pull-ups and the other variations occurred. In conclusion, only one muscular difference existed between the exercise variations and all versions examined provided electromyographical values, determined by current literature, to invoke a sufficient stimulus to promote increases in muscle strength and hypertrophy. Although further research is needed, practitioners can be confident when programming any of the movement variations examined when attempting to elicit adaptations of muscular strength and hypertrophy