Alien Registration- Mclean, Neil (Waterville, Kennebec County)

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A Study of the Effect of Local and Distant Sepsis on the Patency of Microvascular Anastomoses

1. Introduction. Although Carrel laid the basic foundations of organ transplantation, vascular anastomosis and free tissue transfer in the early part of this century, it was not until almost 50 years later that the first successful free flap was reported by Seidenberg and colleagues. Now, using refined instrumentation, success rates of around 90% are reported in most large clinical studies involving the microvascular transfer of free tissues. Many factors such as technique, irradiation, tension, diabetes and nicotine, are known to influence the patency of a micro-vascular anastomosis, but although the role of infection in vascular practice has been well documented, to date, little work has been published on the effect of sepsis on a micro-vascular repair. The purpose of this study in the rat experimental model, was to investigate the role of distant septic inflammation, distant sterile inflammation, local wound sepsis and a transient sub-lethal bacteraemia on the patency of microvascular anastomoses

The formation of teaching identities among novice social science seminar tutors: A longitudinal study at the London School of Economics and Political Science

Research into academic identities has predominantly identified how social structures influence and constrain the agency of those involved in academic work (McLean, 2012). This reflects the predominantly sociological underpinnings of this research area (Clegg,200S). This study introduces psychological theory on identity formation to offer a complementary focus on individual agency and personal meaning making. This longitudinal case study investigates how five novice social science graduate teaching assistants (GTAs) formed identities as academic teachers during their first two years inservice. These tutors participated in the London School of Economics' Postgraduate Certificate in Higher Education (PGCertHE) during these two years. Changing identity positioning over time (Wetherell, 2001) was captured in tutors' writing using discourse analysis developed in the Discursive Psychological tradition (Edley, 2001). The findings of this study offer insight into academic identity formation. However, this study also contributes to research into the impact that participation on developmental courses, such as the LSE PGCertHE, can have on aspiring faculty as academic teachers. Impact has been assessed through pre- and post-testing (Gibbs & Coffey, 2004; Hanbury, Prosser, & Rickinson, 2008; Postareff, Lindblom-Ylanne, & Nevgi, 2007) and case studies (Butcher & Stoncel, 2012; Ho, Watkins, & Kelly, 2001). These studies have found impacts in terms of increased student focus and self-efficacy (Stes, Min-Leliveld, Gijbels, & Van Petegem, 2010). This study presents complementary findings. However, the longitudinal design offers an account of how the change identified in the larger, survey-ba~ed studies can come about. This shifting positioning is presented here in terms of initial 'idealism' becoming 'realism' with experience, but then leading to 'independence' as tutors developed 'pedagogic content knowledge' (Shulman, 1987)

Nesting of Red-Winged Blacbirds in Cattails and Commed Reed Grass in Mentor Harsh

Author Institution: Department of Biology, John Carrol UniversityDuring summer 1976, a study of habitat selection by the red-winged blackbird, Agelaius phoeniceus, was conducted. Mentor Marsh near Mentor, Ohio was chosen because of its unique geologic and botanical history. A swamp forest prior to 1959, the area is now a marsh composed of Typha latifolia, T. angustifolia, and Phragmites australis. Preferences of A. phoeniceus for each of these plants were investigated, and T. latifolia was significantly most chosen. Presumed advantages include rigidity, easy nest accessibility, and wide spacing to facilitate nest defense. Additional features of habitat selected such as available perches, proximity of open water, and edge effect were investigated. If rapid succession to monodominant stands of P. australis continues at the present rate, the nesting red-winged blackbird population may decrease sharply

The New Zealand workforce survey II: occupational risk factors for asthma.

INTRODUCTION: We conducted a cross-sectional population-based survey in New Zealand that collected information on work history, current workplace exposures, and selected health outcomes. We report here the findings on occupational risk factors for asthma symptoms. METHODS: A random sample of men and women aged 20-64 years were selected from the New Zealand Electoral Roll and invited to take part in a telephone survey. Current asthma was defined as: (i) woken up by shortness of breath in the past 12 months; or (ii) an attack of asthma in the past 12 months; or (iii) currently taking asthma medication. Adult-onset asthma was defined as first attack of asthma at age 18 or over. Prevalence odds ratios (ORs) for all occupations were calculated using logistic regression adjusting for sex, age, smoking, and deprivation. RESULTS: Totally, 2903 participants were included in the analyses. The prevalence of current asthma was 17% and the prevalence of adult-onset asthma was 9%. Prevalence ORs for current asthma were elevated for ever working as a printer [OR = 2.26; 95% confidence interval (CI) = 1.09-4.66], baker (OR = 1.98; 95% CI = 1.02-3.85), sawmill labourer (OR = 3.26; 95% CI = 1.05-10.16), metal processing plant operator (OR = 2.48; 95% CI = 1.22-5.05), and cleaner (OR = 1.60; 95% CI = 1.09-2.35). Excess risks of adult-onset asthma were also found for ever working as a printer, baker, and sawmill labourer as well as ever-working as a market-oriented animal producer (OR = 1.66; 95% CI = 1.14-2.41), and other agricultural worker (OR = 2.08; 95% CI = 1.03-4.20). A number of occupations not previously considered at high risk for asthma were also identified, including teachers and certain sales professionals. CONCLUSION: This population-based study has confirmed findings of previous international studies showing elevated risks in a number of high-risk occupations. The strongest risks were consistently observed for printers, bakers, and sawmill labourers. Several occupations were also identified that have not been previously associated with asthma, suggesting that the risk of occupational asthma may be more widely spread across the workforce than previously assumed

Use of Drains for Passive Control of Flow Through a Permeable Reactive Barrier

Abstract Permeable reactive barrier technology is a cost effective means of treating near surface groundwater contaminant plumes. However, current reactive barrier technology lacks the capacity to manipulate flow rates and thus hydraulic retention time (HRT) within the barriers in order to maximize the effectiveness and longevity of the media. This study examines the effectiveness of tile drains as passive controls on the flow rate of ground-water through an existing wood particle media permeable reactive barrier treating agricultural nitrate. The use of upgradient and downgradient tile drains allowed HRT to be increased from 4.5 to 10 days in one trial and then to be decreased from 11.1 to 0.8 days in a second trial. Influent groundwater NO3-N concentrations of ~100 mg/L were attenuated to detection limit (0.02 mg/L) only 12% of the 4 m long barrier with HRTs of 4.5 to 10 days. During the second trial, HRT was decreased to 0.8 days and NO3-N penetrated to the downgradient edge of the PRB at 1.8 mg/L. The behaviour of SO4 in the PRB was also affected by flow rate. SO4 entered the PRB at 60 to 71 mg/L during the first trial. Under a HRT of 10 days it was depleted to detection limit after traveling through only 13% of the barrier. When HRT was decreased to 4.5 days, SO4 was able to penetrate the downgradient edge of the PRB at concentrations from 4 to 6 mg/L. With a 0.8 day HRT SO4 reduction was highly restricted as calculations showed 90% of available carbon in the PRB was being used to reduce NO3-N, compared to 7.5% being used for SO4 reduction at that time. In comparison, at the 10 day HRT, 61% of carbon being used for NO3-N reduction, 8.7% for SO4 reduction, 0.7 for dissolved oxygen and 29% was lost through DOC leaching. These calculations suggest that barrier efficiency can be greatly enhanced by manipulation of HRT through use of tile drains

Vestibular evoked potentials (VsEPs) of cortical origin produced by impulsive acceleration applied at the nasion

Abstract: We report the results of a study to record vestibular evoked potentials (VsEPs) of cortical origin produced by impulsive acceleration (IA). In a sample of 12 healthy participants, evoked potentials recorded by 70 channel electroencephalography were obtained by IA stimulation at the nasion and compared with evoked potentials from the same stimulus applied to the forefingers. The nasion stimulation gave rise to a series of positive and negative deflections in the latency range of 26–72 ms, which were dependent on the polarity of the applied IA. In contrast, evoked potentials from the fingers were characterised by a single N50/P50 deflection at about 50 ms and were polarity invariant. Source analysis confirmed that the finger evoked potentials were somatosensory in origin, i.e. were somatosensory evoked potentials, and suggested that the nasion evoked potentials plausibly included vestibular midline and frontal sources, as well as contributions from the eyes, and thus were likely VsEPs. These results show considerable promise as a new method for assessment of the central vestibular system by means of VsEPs produced by IA applied to the head

A longitudinal study of the impact of reflective coursework writing on teacher development courses: a ‘legacy effect’ of iterative writing tasks

Studies into the efficacy of teacher development courses for early career academics point to graduates conceiving of their teaching in increasingly complex and student-focussed ways. These studies have used pre- and post-testing of conceptions of teaching to identify this finding. However, these studies do not identify what aspects of these courses contributed to these changes. This exploratory case study investigates this phenomenon through a longitudinal study of 16 academic teachers’ reflective coursework writing. Discourse analysis was used to contrast causal reasoning statements in assignments completed during participants’ first 2 years in-service, while they were completing a UK-based teacher development course. This analysis identified how reasoning about teaching and learning became more complex over time. A key element was the integration of experiences and earlier learning into more nuanced and multi-factorial later reasoning about teaching choices and effects. This ‘legacy effect’ provides new evidence for the efficacy of academic teacher development courses