3,191 research outputs found

    Mobile remote manipulator system for a tetrahedral truss

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    The mobile remote manipulator system (MRMS) was initially developed for transit about the trusses of the delta space station; however, it can be utilized just as easily for transit about the trusses of the dual keel station. The MRMS is comprised of a mobile platform having a rail system formed of transversely disposed T-shaped tracks, which engage with guide pins located at the nodes of the trusses. The guide pins form a grid and the tracks are so designed as to permit travel in either of two orthogonal directions. The present invention provides a near-uniform traversing velocity with minimal dynamic loading on the system. Pivoting changers move the platform from one face to another

    An Assay for the Estimation of Organic Content in Unknown Biological Samples

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    Potassium dichromate, in an acidic solution, will oxidize organic material. The reduction to the chromium ion is associated with a color change, which can be measured as a change in absorbance using a spectrophotometer. The degree of change is linearly related to the total energy contained in a sample and this information can be used to predict the energy content of unknown samples. However, the slopes of these relationships are significantly different for carbohydrates and proteins. It is hypothesized that these variations are due to differences in the reaction kinetics and that these differences can be used to predict the biochemical composition of mixtures of proteins and carbohydrates. Data collected to date indicate changes to the procedure are necessary for accurate estimation of biochemical content

    Father Involvement Among Nonresident Dads: Does Paternity Leave Matter?

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    ObjectiveThis article examines whether paternity leave influences father involvement among nonresident fathers, if associations differ by coresidential status, and whether leave is a stronger predictor of nonresident father involvement than other indicators of father identity or interest.BackgroundFathering promotes child development, yet many children are born to unmarried parents and do not live with their fathers. Paternity leave may increase fathering among nonresident fathers, but extant research has largely overlooked these fathers.MethodUsing the Fragile Families and Child Wellbeing Study (Nāˆ¼2,000), a longitudinal birth cohort of largely lowā€income families, this study examines the link between paternity leave and parenting using regression analyses.ResultsLeaveā€taking was associated with higher reports of engagement for both coresident and nonresident fathers, but for maternal reports of trust, coparenting, and responsibility, the positive associations with leaveā€taking were concentrated among nonresident fathers. Nonresident fathers who took leave were more likely to provide inā€kind child support but not monetary support. Although leave, prenatal involvement, and being at the birth were all associated with greater involvement among nonresident fathers, mothersā€™ reports of fathering were more strongly influenced by prenatal involvement and being at the hospital for the birth than leave.ConclusionLeaveā€taking is associated with maternal reports of trust, coparenting, and responsibility for nonresident fathers but not coresident fathers. Leave and prenatal involvement predict nonresident father involvement.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/163467/2/jomf12677.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/163467/1/jomf12677_am.pd

    Desirable Qualities, Attributes, and Characteristics of Successful Athletic Trainers -- A National Study

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    In an effort to determine the importance of desirable qualities, attributes and characteristics necessary for the success of interscholastic athletic trainers a Likert-type scale survey was mailed to all head athletic trainers of NCAA Division III institutions in the United States. The survey consisted of 24 statements allowing for the following responses: essential, very important, important, not very important, and irrelevant. The qualities that were deemed the most desirable by head athletic trainers were trustworthiness (76.2%), honesty (73.5%), dependability (66.4%), and possessing high ethical standards (66.4%). The two characteristics that were found to be the least essential were being a risk-taker (2.1%) and being a visionary (6.4%
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