4,396 research outputs found

    Influence of Weather On Movement and Habitat Use of Hen Pheasants During Brood Rearing

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    Pheasants survive in a wide range of yearly weather extremes but can be limited by certain short-term weather factors (Graham and Hosterburg 1948). Study of short-term weather conditions can therefore be important in understanding pheasant survival. Many studies have been done on yearly and seasonal effects of weather on pheasant production and survival. Bemitt and Terril (1940) reported on possible temperature factors in pheasant management in the north central area of the United States. Effects of weather on pheasant reproduction were studied by Buss and Swanson (1950) and Kozieky et al. (1955). MacKullan and Eherhardt (1953) studied the tolerance of incubating eggs and young chicks to exposure. Labisky et al. (1964) discussed the influence of land use and weather on pheasant distribution. A few studies have reported the daily effects of weather on movement and habitat use of pheasants. The ability of pheasants to withstand climatic elements was measured by Latham (1947). Restriction of pheasant movement by weather was reported by Shick (1952) and Weston (1954). Cover type use was related to weather by Grondahl (1953). The previous studies were all done by visual observation. The development of radio-telometry systems (LeKunyan et al. 1959, Marshall 1960, Cochrane and Lord 1963) and techniques (Marshall and Kupa 1963) have made possible the collection of more information on daily movement and habitat use. The use of computers to analyze these data has allowed more detailed studies to be done (Siniff and Tester 1965). Movement and behavior of her pheasants during the nesting season were reported by Kuck et al. (1970). Carter (1971) studied seasonal movement of pheasants. General habitat use and movement of hen pheasants during brood-rearing were studied by Hanson (1971). Survival of broods may have as much influence on pheasant population as hatching success (Trautman and Dahlgren 1965). Since little is known about the influence of daily weather variations on hens during the brood-rearing period, the objective of this study was to determine the effect of selected weather conditions on the movement and habitat use of hen pheasants during the brood-rearing period

    A prospective longitudinal study of perceived infant outcomes at 18-24 months: Neural and psychological correlates of parental thoughts and actions assessed during the first month postpartum

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    The first postpartum months constitute a critical period for parents to establish an emotional bond with their infants. Neural responses to infant-related stimuli have been associated with parental sensitivity. However, the associations among these neural responses, parenting, and later infant outcomes for mothers and fathers are unknown. In the current longitudinal study, we investigated the relationships between parental thoughts/actions and neural activation in mothers and fathers in the neonatal period with infant outcomes at the toddler stage. At the first month postpartum, mothers (n=21) and fathers (n=19) underwent a neuroimaging session during which they listened to their own and unfamiliar baby’s cry. Parenting-related thoughts/behaviors were assessed by interview twice at the first month and 3-4 months postpartum and infants’ socioemotional outcomes were reported by mothers and fathers at 18-24 months postpartum. In mothers, higher levels of anxious thoughts/actions about parenting at the first month postpartum, but not at 3-4 months postpartum, were associated with infant’s low socioemotional competencies at 18-24 months. Anxious thoughts/actions were also associated with heightened responses in the motor cortex and reduced responses in the substantia nigra to own infant cry sounds. On the other hand, in fathers, higher levels of positive perception of being a parent at the first month postpartum, but not at 3-4 months postpartum, were associated with higher infant socioemotional competencies at 18-24 months. Positive thoughts were associated with heightened responses in the auditory cortex and caudate to own infant cry sounds. The current study provides evidence that parental thoughts are related to concurrent neural responses to their infants at the first month postpartum as well as their infant’s future socioemotional outcome at 18-24 months. Parent differences suggest that anxious thoughts in mothers and positive thoughts in fathers may be the targets for parenting-focused interventions very early postpartum

    Drilling down into ethics: A thematic review of ethical considerations for the creation and use of 3D printed human remains in crime reconstruction

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    The existing literature contains some exploration of the ethics concerning human remains in forensic and virtual anthropology. However, previous work has stopped short of interrogating the underlying ethical concepts. The question of how people understand and apply these concepts in practice, and what it means to act ethically, remain underexplored. This thematic review explores the ethical considerations that contribute to the creation and use of 3D printed human remains for forensic purposes. The three main branches of ethical theory are outlined to explore how they may apply to forensic practice. Key themes relating to 3D printing human remains in forensic contexts were explored to better understand the ethics landscape, ethical challenges, and the current guidelines in place. Through this thematic review, nine ethics principles were identified as key principles for guiding best practice: anonymity, autonomy, beneficence, consent, context, justice, non-maleficence, proportionality, and transparency. It is suggested that these principles could be incorporated into adaptable guidelines going forward to support ethical practice. The findings also suggest that holistic ethics cognition training may have value in supporting forensic scientists in ethical decision-making, together with procedural and structural design that may promote best practice and reduce cognitive load

    ENSURING MATHEMATICAL LEARNING IN RURAL SCHOOLS Investing in Teacher Knowledge

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    In this research article we share our vision of how to improve student mathematics success in rural districts. Good teaching matters. We have found two recurring features that can support teachers\u27 success in effectively teaching students mathematics: high-quality, longitudinal professional development and professional connections. We partner with rural districts and master teachers to offer local high-quality professional development for mathematics teachers to strengthen their mathematical knowledge for teaching. We have substantial evidence that participation in longitudinal, high-quality professional development significantly increases teachers\u27 mathematical knowledge for teaching, as well as improves their confidence in teaching. Bringing teachers together for professional development helps teachers develop professional connections. Such connections are necessary for teachers to have regular conversations about mathematics teaching and learning with peers. University-district partnerships can provide infrastructure to allow teachers to develop connections with each other, to collectively support each other, and to collaborate in teaching mathematics more effectively. Investing in professional development for rural teachers and supporting professional connections among teachers will help us achieve the common goal of increasing student success in mathematics

    An Ethical Claim for Administration of Pre-Exposure Prophylaxis (PREP) in HIV and AIDS Burdened Africa

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    It is morally justifiable for every person of good will to venture into HIV and AIDs prevention among the populace. Pre-exposure Prophylaxis (PrEP) administration promises to help meet the promise of this moral claim, which is founded on two ethical principles of ensuring wellbeing and justice for all. In spite of the efforts, challenges abound, especially in Africa. Some African tenets of sexuality, unavailability of contextualized and harmonized African sexuality theory as well as Africa’s poor economic standing are major threats to the administration of PrEP. This paper highlighted the major challenges and calls for their resolution if PrEP administration is to be of help to the poor and HIV burdened Africans.Key Words: HIV prevention, Preexposure Prophylaxis (PrEP), well-being, justic

    No dose response effect of carbohydrate mouth rinse on cycling time-Trial performance

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    © 2017 Human Kinetics, Inc. The aim of the current study was to investigate the influence of mouth rinsing carbohydrate at increasing concentrations on ~1 hr cycle time trial performance. Eleven male cyclists completed three experimental trials, following an overnight fast. Cyclists performed a ~1 hr time trial on a cycle ergometer, while rinsing their mouth for 5 s with either a 7% maltodextrin solution (CHO), 14% CHO or a taste-matched placebo (PLA) after every 12.5% of the set amount of work. Heart rate was recorded every 12.5% of the time trial, while RPE and GI comfort were determined every 25% of the time trial. The mouth rinse protocol influenced the time to complete the time trial (p < .001), with cyclists completing the time trial faster during 7% CHO (57.3 ± 4.5 min; p = .004) and 14% CHO (57.4 ± 4.1 min; p = .007), compared with PLA (59.5 ± 4.9 min). There was no difference between the two carbohydrate trials (p = .737). There was a main effect of time (P<0.001) for both heart rate and RPE, but no main effect of trial (p = .107 and p = .849, respectively). Scores for GI comfort ranged from 0-2 during trials, indicating very little GI discomfort during exercise. In conclusion, mouth rinsing and expectorating a 7% maltodextrin solution, for 5 s routinely during exercise was associated with improved cycle time trial performance approximately 1 h in duration. Increasing the carbohydrate concentration of the rinsed solution from 7% to 14% resulted in no further performance improvement

    Does hypohydration really impair endurance performance? Methodological considerations for interpreting hydration research

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    The impact of alterations in hydration status on human physiology and performance responses during exercise is one of the oldest research topics in sport and exercise nutrition. This body of work has mainly focussed on the impact of reduced body water stores (i.e. hypohydration) on these outcomes, on the whole demonstrating that hypohydration impairs endurance performance, likely via detrimental effects on a number of physiological functions. However, an important consideration, that has received little attention, is the methods that have traditionally been used to investigate how hypohydration affects exercise outcomes, as those used may confound the results of many studies. There are two main methodological limitations in much of the published literature that perhaps make the results of studies investigating performance outcomes difficult to interpret. First, subjects involved in studies are generally not blinded to the intervention taking place (i.e. they know what their hydration status is), which may introduce expectancy effects. Second, most of the methods used to induce hypohydration are both uncomfortable and unfamiliar to the subjects, meaning that alterations in performance may be caused by this discomfort, rather than hypohydration per se. This review discusses these methodological considerations and provides an overview of the small body of recent work that has attempted to correct some of these methodological issues. On balance, these recent blinded hydration studies suggest hypohydration equivalent to 2–3% body mass decreases endurance cycling performance in the heat, at least when no/little fluid is ingested

    Infrastructure Redesign and Instructional Reform in Mathematics: Formal Structure and Teacher Leadership

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    Designing infrastructures to support instruction remains a challenge in educational reform. This article reports on a study of one school system\u27s efforts to redesign its infrastructure for mathematics instruction by promoting teacher leadership. Using social network and interview data from 12 elementary schools, we explore how the district\u27s infrastructure redesign efforts were internally coherent with and built upon existing infrastructure components. We then explore relations between infrastructure and school practice as captured in the instructional advice- and information-seeking interactions among school staff, finding that teacher leaders emerged as central actors and brokers of advice and information about mathematics within and between schools. Further, changes in school advice and information networks were associated with shifts in teachers\u27 beliefs about and practices in mathematics toward inquiry-oriented approaches consistent with district curriculum. We argue that the district\u27s redesign efforts to support teacher leadership coupled district curriculum and school and classroom practice in mathematics
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