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Measurements of 21 cm Epoch of Reionization (EoR) structure are subject to systematics originating from both the analysis and the observation conditions. Using 2013 data from the Murchison Widefield Array (MWA), we show the importance of mitigating both sources of contamination. A direct comparison between results from Beardsley et al. and our updated analysis demonstrates new precision techniques, lowering analysis systematics by a factor of 2.8 in power. We then further lower systematics by excising observations contaminated by ultra-faint RFI, reducing by an additional factor of 3.8 in power for the zenith pointing. With this enhanced analysis precision and newly developed RFI mitigation, we calculate a noise-dominated upper limit on the EoR structure of Δ2 ≤ 3.9 × 103 mK2 at k = 0.20 h Mpc−1 and z = 7 using 21 hr of data, improving previous MWA limits by almost an order of magnitude. [ABSTRACT FROM AUTHOR]

Background : Past research has shown farmer anxiety and stress have significantly affected many farmers and their families due not only to the impact on feelings of happiness and success, but also on output efficiency, accident rates, and health. The past approach to ameliorating anxiety has been through utilizing coping mechanisms such as sharing with significant others, venting, planning, self-blame, and positive thinking. A problem has also been farmers' reluctance to voice difficulties and seek help. Method : An alternative, more basic approach to anxiety amelioration is possible. This involves isolating the human characteristics that lead to anxiety, and subsequently modifying these to reduce anxiety and its associated impacts. Accordingly, the extensive literature on anxiety and stress was reviewed to facilitate developing an hypothesis outlining the important components explaining farmer anxiety. To assess the parameters of farmer anxiety, a random survey of New Zealand farmers was used to obtain their ratings on their anxiety. Regression models were used to quantify the relationships. Results : Specific farmer personal characteristics were shown to be highly related to anxiety. These included a farmer's personality, objective set, belief in their ability to control outcomes, as well as education and age. Conclusion : This analysis provides the information required to direct counseling efforts to modify the anxiety creating personal variables and, consequently, reduce anxiety and its impact on a longer term basis.

Applications of immunophenotyping using flow cytometry offer precise and accurate means for providing information used to both diagnose and monitor disease; they serve as a standard platform for many research endeavors that study discrete populations of biological entities. The proper use of this highly sophisticated technology requires daily and ongoing monitoring of both the instrument and the methodology. Best practices for this begin with quality control (QC) procedures designed to set up and monitor the instrument performance, the reagents, and the results to ensure that they are working properly both on the day of use and over time. If the results of those QC procedures are outside of acceptable then recording the corrective action taken must also be included in the quality control records. Quality assurance (QA) is a way to know that the three phases of testing, namely, preanalytic, analytic, and postanalytic procedures, are being followed. This chapter describes the procedures used to assess quality control as it pertains to flow cytometry and immunophenotyping in all three phases of testing.