708 research outputs found

    The Quaternary Stratigraphy Of A Portion Of Southeastern Manitoba, Canada

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    RACE WALKING GROUND REACTION FORCES

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    Race walking is an athletic event which is contested in most major international track and field competitions, including the Olympics. It is also slowly growing in popularity as a form of exercise and recreation. The rules of race walking state that it is "progression by steps so taken that unbroken contact with the ground is maintained". Further, "during the period of each step when a foot is on the ground, the leg must be straightened (i.e., not bent at the knee) at least for one moment... in the vertical upright position" (I . A . A . F . , 1982)

    The Effect of Chemical Amendments Used for Phosphorus Abatement on Greenhouse Gas and Ammonia Emissions from Dairy Cattle Slurry: Synergies and Pollution Swapping

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    peer-reviewedLand application of cattle slurry can result in incidental and chronic phosphorus (P) loss to waterbodies, leading to eutrophication. Chemical amendment of slurry has been proposed as a management practice, allowing slurry nutrients to remain available to plants whilst mitigating P losses in runoff. The effectiveness of amendments is well understood but their impacts on other loss pathways (so-called ‘pollution swapping’ potential) and therefore the feasibility of using such amendments has not been examined to date. The aim of this laboratory scale study was to determine how the chemical amendment of slurry affects losses of NH3, CH4, N2O, and CO2. Alum, FeCl2, Polyaluminium chloride (PAC)- and biochar reduced NH3 emissions by 92, 54, 65 and 77% compared to the slurry control, while lime increased emissions by 114%. Cumulative N2O emissions of cattle slurry increased when amended with alum and FeCl2 by 202% and 154% compared to the slurry only treatment. Lime, PAC and biochar resulted in a reduction of 44, 29 and 63% in cumulative N2O loss compared to the slurry only treatment. Addition of amendments to slurry did not significantly affect soil CO2 release during the study while CH4 emissions followed a similar trend for all of the amended slurries applied, with an initial increase in losses followed by a rapid decrease for the duration of the study. All of the amendments examined reduced the initial peak in CH4 emissions compared to the slurry only treatment. There was no significant effect of slurry amendments on global warming potential (GWP) caused by slurry land application, with the exception of biochar. After considering pollution swapping in conjunction with amendment effectiveness, the amendments recommended for further field study are PAC, alum and lime. This study has also shown that biochar has potential to reduce GHG losses arising from slurry application.This research was funded by the Teagasc Walsh Fellowship Scheme and the AnimalChange Framework 7 Project (FP7-KBBE-2010-4)

    Impact of pig slurry amendments on phosphorus, suspended sediment and metal losses in laboratory runoff boxes under simulated rainfall

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    peer-reviewedLosses of phosphorus (P) when pig slurry applications to land are followed by a rainfall event or losses from soils with high P contents can contribute to eutrophication of receiving waters. The addition of amendments to pig slurry spread on high P Index soils may reduce P and suspended sediment (SS) losses. This hypothesis was tested at laboratory-scale using runoff boxes under simulated rainfall conditions. Intact grassed soil samples, 100 cm-long, 22.5 cm-wide and 5 cm-deep, were placed in runoff boxes and pig slurry or amended pig slurry was applied to the soil surface. The amendments examined were: (1) commercial grade liquid alum (8% Al2O3) applied at a rate of 0.88:1 [Al:total phosphorus (TP)] (2) commercial-grade liquid ferric chloride (38% FeCl3) applied at a rate of 0.89:1 [Fe:TP] and (3) commercial-grade liquid poly-aluminium chloride (PAC) (10% Al2O3) applied at a rate of 0.72:1 [Al:TP]. The grassed soil was then subjected to three rainfall events (10.3 ± 0.15 mm h−1) at time intervals of 48, 72, and 96 h following slurry application. Each sod received rainfall on 3 occasions. Results across three rainfall events showed that for the control treatment, the average flow weighted mean concentration (FWMC) of TP was 0.61 mg L−1, of which 31% was particulate phosphorus (PP), and the average FWMC of SS was 38.1 mg L−1. For the slurry treatment, there was an average FWMC of 2.2 mg TP L−1, 47% of which was PP, and the average FWMC of SS was 71.5 mg L−1. Ranked in order of effectiveness from best to worst, PAC reduced the average FWMC of TP to 0.64 mg L−1 (42% PP), FeCl3 reduced TP to 0.91 mg L−1 (52% PP) and alum reduced TP to 1.08 mg L−1 (56% PP). The amendments were in the same order when ranked for effectiveness at reducing SS: PAC (74%), FeCl3 (66%) and alum (39%). Total phosphorus levels in runoff plots receiving amended slurry remained above those from soil only, indicating that, although incidental losses could be mitigated by chemical amendment, chronic losses from the high P index soil in the current study could not be reduced.The first author gratefully acknowledges the award of the EMBARK scholarship from IRCSET to support this study

    The Effects of the COVID-19 Pandemic on Maine’s Labor Market and Workforce

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    This article uses a variety of data sources to examine the pandemic’s impact on the labor market in Maine, first by putting it in the context of past recessions, then by assessing telework suitability across occupations, and finally by exploring the differential job losses that occurred during the pandemic by sector and by gender and educational attainment

    Estimating the Undercoverage of a Sampling Frame due to Reporting Delays

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    One of the imperfections of a sampling frame is miscoverage caused by delays in recording real- life events that change the eligibility of population units. For example, new units generally appear on the frame some time after they came into existence and units that have ceased to exist are not removed from the frame immediately. We provide methodology for predicting the undercoverage due to delays in reporting new units. The approach presented here is novel in a business survey context, and is equally applicable to overcoverage due to delays in reporting the closure of units. As a special case, we also predict the number of new-born units per month. The methodology is applied to the principal business register in the UK, maintained by the Office for National Statistics. <br/

    Intuition, expertise and emotion in the decision making of investment bank traders

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    The role of intuition may be especially dominant in organizations embedded in turbulent environments (Khatri & Ng, 2000). Dane and Pratt (2007) argue that intuition will be more likely to function as an effective component of decision making in performance domains that require significant experience and complex domain-relevant schema, a description that fits the world of financial trading. Traders are also frequently engaged in decision making that is characterized by time pressure, high risk, complexity and imperfect information. In a previous study (Fenton-O’Creevy et al., 2011), the second author found that many high performing traders deploy a reflective and critical approach to the use and development of intuition, which they understand as well-founded in prior experience. In this chapter we draw on our prior research to discuss the role of intuition in the work of professional traders. We bring together the results of our research on emotion regulation of investment bank traders (Fenton-O’Creevy et al., 2005, 2011, 2012; Vohra & Fenton-O’Creevy, 2011) with research on expertise and affect-based intuition (Baylor, 2001; Dane & Pratt, 2007; Simon, 1987; Sinclair & Ashkanasy, 2005; Weiss & Cropanzano, 1996) to argue that since more effective emotion regulation is associated with greater experience and more effective use of emotions in decision making (Fenton-O’Creevy et al., 2012) and emotions underpin the use of intuition (Lieberman, 2000; Sinclair & Ashkanasy, 2005), then effective emotion regulation will be essential in the deployment of expert intuition
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