189 research outputs found
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Wood pole maintenance manual : inspection and supplemental treatment of douglas-fir and western redcedar poles
The effects of the spontaneous presence of a spouse/partner and others on cardiovascular reactions to an acute psychological challenge
The presence of supportive others has been associated with attenuated cardiovascular reactivity in the laboratory. The effects of the presence of a spouse and others in a more naturalistic setting have received little attention. Blood pressure and heart rate reactions to mental stress were recorded at home in 1028 married/partnered individuals. For 112 participants, their spouse/partner was present; for 78, at least one other person was present. Women tested with a spouse/partner present showed lower magnitude systolic blood pressure and heart rate reactivity than those tested without. Individuals tested with at least one nonspousal other present also displayed attenuated reactivity. This extends the results of laboratory studies and indicates that the spontaneous presence of others is associated with a reduction in cardiovascular reactivity in an everyday environment; spouse/partner presence would appear to be especially effective for women.\ud
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Marine wood maintenance manual : a guide for proper use of Douglas-fir in marine exposures
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Control of wood rot in waterfront structures
Published August 1981. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the Sea Grant Catalog: http://seagrant.oregonstate.edu/publication
Spectral super-resolution in metamaterial composites
We investigate the optical properties of periodic composites containing
metamaterial inclusions in a normal material matrix. We consider the case where
these inclusions have sharp corners, and following Hetherington and Thorpe, use
analytic results to argue that it is then possible to deduce the shape of the
corner (its included angle) by measurements of the absorptance of such
composites when the scale size of the inclusions and period cell is much finer
than the wavelength. These analytic arguments are supported by highly accurate
numerical results for the effective permittivity function of such composites as
a function of the permittivity ratio of inclusions to matrix. The results show
that this function has a continuous spectral component with limits independent
of the area fraction of inclusions, and with the same limits for both square
and staggered square arrays.Comment: 17 pages, 6 figure
Standardized Management Protocol in Severe Postpartum Hemorrhage: A Single-Center Study.
Severe postpartum hemorrhage (sPPH) is an obstetric emergency that needs prompt and effective therapy to reduce the risk of complications. In this study, women who developed sPPH (study cohort, n = 27) were treated according to a standardized management protocol prescribing sequential administration of uterotonic drugs, crystalloids, tranexamic acid, labile blood products, low-dose fibrinogen, and recombinant activated factor VII (rFVIIa). This group was compared to patients treated with different strategies during 2 preceding periods: an in-house guideline regulating the administration of rFVIIa (historical cohort 1, n = 20) and no specific guideline (historical cohort 2, n = 27). The management protocol was used over 33 months. The study cohort had a lower estimated blood loss ( P = .004) and required less red blood cell concentrates ( P = .007), fresh frozen plasma units ( P = .004), and platelet concentrates ( P = .020) compared to historical cohort 1 and historical cohort 2, respectively. The necessity of emergency postpartum hysterectomy was lower in the study group ( P = .012). In conclusion, in patients with sPPH treated with this standardized management protocol, we observed a decreased requirement of labile blood products and lower need to proceed to emergency postpartum hysterectomy
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Spectral bounds for the Neumann-Poincaré operator on planar domains with corners
The boundary double layer potential, or the Neumann-Poincaré operator, is studied on the Sobolev space of order 1/2 along the boundary, coinciding with the space of charges giving rise to double layer potentials with finite energy in the whole space. Poincaré’s program of studying the spectrum of the boundary double layer potential is developed in complete generality on closed Lipschitz hypersurfaces in euclidean space. Furthermore, the Neumann-Poincaré operator is realized as a singular integral transform bearing similarities to the Beurling-Ahlfors transform in 2 dimensions. As an application, in the case of planar curves with corners, bounds for the spectrum of the Neumann-Poincaré operator are derived from recent results in quasi-conformal mapping theory
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