394 research outputs found

    Longley Building: Reuse and Rehabilitation Feasibility Report

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    The southern, eastern, and northern façades (the principal façades) have a great amount of decorative masonry including granite, slate coursing, brownstone coursing, and brick veneer (Photo 2). All of these materials are in good condition, except for the brownstone, which is deteriorating in areas that are connected to a wrought iron balustrade. The surface of the brownstone is face-beded, and the corrosion of the iron in contact with the stone has caused oxide jacking. All of the masonry has environmental staining

    Effect of grazing on ship rat density in forest fragments of lowland Waikato, New Zealand

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    Ship rat (Rattus rattus) density was assessed by snap-trapping during summer and autumn in eight indigenous forest fragments (mean 5 ha) in rural landscapes of Waikato, a lowland pastoral farming district of the North Island, New Zealand. Four of the eight were fenced and four grazed. In each set of four, half were connected with hedgerows, gullies or some other vegetative corridor to nearby forest and half were completely isolated. Summer rat density based on the number trapped in the first six nights was higher in fenced (mean 6.5 rats ha–1) than in grazed fragments (mean 0.5 rats ha–1; P = 0.02). Rats were eradicated (no rats caught and no rat footprints recorded for three consecutive nights) from all eight fragments in January–April 2008, but reinvaded within a month; time to eradication averaged 47 nights in fenced and 19 nights in grazed fragments. A second six-night trapping operation in autumn, 1–3 months after eradication, found no effect of fencing (P = 0.73). Connectedness to an adjacent source of immigrants did not influence rat density within a fragment in either season (summer P = 0.25, autumn P = 0.67). An uncalibrated, rapid (one-night) index of ship rat density, using baited tracking tunnels set in a 50 × 50 m grid, showed a promising relationship with the number of rats killed per hectare over the first six nights, up to tracking index values of c. 30% (corresponding to c. 3–5 rats ha–1). The index will enable managers to determine if rat abundance is low enough to achieve conservation benefits. Our results confirm a dilemma for conservation in forest fragments. Fencing protects vegetation, litter and associated ecological processes, but also increases number of ship rats, which destroy seeds, invertebrates and nesting birds. Maximising the biodiversity values of forest fragments therefore requires both fencing and control of ship rats

    A Study of Planned Health and Production in Beef Suckler Herds

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    The benefits of taking positive action on a herd basis to maintain animal health and efficient production have long been appreciated by the dairy industry. Planned health and production schemes in beef suckler herds have been run successfully in Canada, America and Australia since the late 1970's and their popularity has continued to grow. In the United Kingdom the subject of herd health has recently been fashionable in the dairy and sheep industries however it has had little recognition in the beef industry. There has been a renewed interest in beef suckler cattle and a move from the traditional extensive hill systems to more intensive systems on upland and lowground farms. Due to consumer pressure there are tighter specifications for carcase quality. Therefore more planned systems of production are necessary to maintain profitability and minimise disease. In this study it was hoped that after the implementation of planned health and production schemes on a cross section of beef suckler farms there would be an improvement in herd performance. Records of cow calving details and calf weights by the majority of the farmers allowed the monitoring of herd performance. In the herds studied there was great variation in husbandry practices and in the agricultural background of the farmers so advice was tailored to suit each individual. Certain problems were commonly encountered especially diarrhoea and pneumonia in calves and poor reproductive efficiency of cows. The majority of problems were best overcome by changes in farm management. On all farms there were improvements seen as a result of visits as measured by cow reproductive performance, incidence of calf diseases and calf performance

    The Motivation for and Developmental Benefits of Youth Participation in County 4-H Fairs: A Pilot Study

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    The county 4-H fair is a way for 4-H youth to showcase their project work and receive recognition for their efforts, but it can also provide important opportunities for positive youth development. The study reported here sought to determine motivation for participating in county fair and the impact of fair on development outcomes. Results revealed that having fun was the biggest participation motivator. There were few significant differences in motivation for fair participation that were found between youth who participated in the market animal projects and those who did not. Analysis revealed that fair participation contributes to youth development outcomes

    YA4-H! Youth Advocates for Health: Impact of a 4-H Teens-as-Teachers Program

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    This article reports the results of an evaluation of the YA4-H! Youth Advocates for Health—Teens as Teachers program. Consistent with previous research on the impact of teen teaching, the teens participating in the program gained confidence and skill with regard to teaching younger youths. The program also affected the teens\u27 understanding that they are role models for younger youths and their desire to be role models. Additionally, the teens learned the content they taught and adopted new healthful behaviors. These results are promising and add to the growing body of evidence suggesting that teens learn and adopt practices they teach to younger youths

    Orientational effects on the amplitude and phase of polarimeter signals in double resonance atomic magnetometry

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    Double resonance optically pumped magnetometry can be used to measure static magnetic fields with high sensitivity by detecting a resonant atomic spin response to a small oscillating field perturbation. Determination of the resonant frequency yields a scalar measurement of static field (B_0) magnitude. We present calculations and experimental data showing that the on-resonance polarimeter signal of light transmitted through an atomic vapour in arbitrarily oriented B0B_0 may be modelled by considering the evolution of alignment terms in atomic polarisation. We observe that the amplitude and phase of the magnetometer signal are highly dependent upon B_0 orientation, and present precise measurements of the distribution of these parameters over the full 4 pi solid angle

    Effects of phonological phrasing on syntactic structure

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    Bantu languages are renowned as tone languages that utilize this suprasegmental feature not only on the lexical level to distinguish lexical items, but also on the grammatical level to distinguish clause types. This article investigates one such use of grammatical tone in relative clauses in Bemba where a low tone can be used in place of a segmental relative marker. This low tone relative morpheme functions in conjunction with phrase boundary tone indicated on the head noun and which entails either restrictive or non-restrictive interpretations of relatives. Considering a mapping of XPs to major phonological phrases in the syntax-prosody interface, the resultant phonological phrasing in relatives influences the choice of syntactic structure. In the case at hand, a head-raising analysis provides an optimal mapping between syntax and prosody for restrictives. Further, a more direct influence of phonology on syntax can be seen in a perception-based model like Dynamic Syntax where the on-line building of syntactic trees can gain import from phonological information. © Walter de Gruyter 2007

    The Relationship Between Crystal Structure and Methyl and \u3ci\u3et\u3c/i\u3e-Butyl Group Dynamics in van der Waals Organic Solids

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    We report x-ray diffractometry in a single crystal of 2-t-butyl-4-methylphenol (TMP) and low-frequency solid state nuclear magnetic resonance (NMR) proton relaxometry in a polycrystalline sample of TMP. The x-ray data show TMP to have a monoclinic, P2(1)/c, structure with eight molecules per unit cell and two crystallographically inequivalent t-butyl group (C(CH3)(3)) sites. The proton spin-lattice relaxation rates were measured between 90 and 310 K at NMR frequencies of 8.50, 22.5, and 53.0 MHz. The relaxometry data is fitted with two models characterizing the dynamics of the t-butyl groups and their constituent methyl groups, both of which are consistent with the determined x-ray structure. In addition to presenting results for TMP, we review previously reported x-ray diffractometry and low-frequency NMR relaxometry in two other van der Waals solids which have a simpler structure. In both cases, a unique model for the reorientational dynamics was found. Finally, we review a similar previously reported analysis in a van der Waals solid with a very complex structure in which case fitting the NMR relaxometry requires very many parameters and serves mainly as a flag for a careful x-ray diffraction study

    Investing in Leadership Development: A Tool for Systems Change in the Community Health Center Field

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    Over the course of 12 years, the Blue Shield of California Foundation committed nearly $20 million to growing a pool of community health center leaders who were prepared to be effective agents of change in their organizations and in the safety net field. This signature investment, the Clinic Leadership Institute, was implemented in partnership with the Healthforce Center at University of California, San Francisco, in anticipation of a generation of California health center leaders beginning to transition into retirement. During the institute\u27s 10 cohorts, access to community health centers dramatically increased with the Affordable Care Act, and this — coupled with rising costs of health care — continued to underscore how crucial community health centers were to accessible and quality care for poor and underserved populations. A study spanning 10 cohorts of alumni found that the institute served a critical role in supporting community health center leaders and their organizations in navigating these changes, while also building alumni networks advocating for community health centers in county- and state-level policy. The program equipped 258 individuals to lead and deliver care in a field marked by continuous change, complexity, and mounting demand. Drawing on these findings, we make the case that investment in leadership development is a critical philanthropic tool for field building and, ultimately, systems change. We explore how the foundation made the most of this investment through intentional funding, design, and strategic considerations

    Effects of sodium intake, furosemide, and infusion of atrial natriuretic peptide on the urinary and metabolic clearances of arginine vasopressin in normal subjects

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    Arginine vasopressin (AVP) and atrial natriuretic peptide (ANP) have important influences on water and electrolyte metabolism, and studies on the interactions between these hormones may have important implications. We have investigated the effects of sodium intake, furosemide, and infusion of ANP on the urinary and metabolic (nonurinary) clearances of AVP in hydrated normal subjects. On a high sodium diet there was an increase in urine volume, sodium excretion, osmolal clearance, plasma ANP concentration, and urinary clearance and fractional excretion of AVP, with a decrease in PRA. The infusion of furosemide increased urine volume, sodium excretion, osmolal clearance, and PRA, but decreased circulating ANP levels and urinary clearance and fractional excretion of AVP. Since there was a positive correlation between circulating ANP and urinary clearance of AVP in these experiments, we infused human aANP in physiological amounts and found increases in the urinary and metabolic (nonurinary) clearances of AVP. The changes in urinary clearance of AVP in all three experiments occurred even in relation to creatinine clearance. These observations demonstrate that urinary clearance of AVP does not correlate with urine volume, sodium or solute excretion, or PRA. The observations support a physiological role for ANP in modulating the renal action of AVP, probably at the level of the renal tubules, and indicate a need for caution when using plasma or urinary AVP as an indicator of AVP release from the neurohypophysis
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