2,376 research outputs found

    The diurnal mixed layer and upper ocean heat budget in the western equatorial Pacific

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    This paper presents the results of an experiment in the western equatorial Pacific centered on the equator at 165°E which was designed to study the changes to the structure of the upper ocean on timescales of a few days and spatial scales of tens of kilometers. The results show that the response of the upper ocean to atmospheric forcing is very sensitive to the vertical structure of both the temperature and salinity. The diurnal response of the near-surface temperature to daytime heating and nighttime cooling was found to have an amplitude of a few tenths of a degree Celsius, This compares with a horizontal variation of temperature on scales of a few tens of kilometers of a similar magnitude. Even away from the very fresh surface layers typical of the area, salinity is found to play an important role in limiting the depth of nighttime mixing. In this case a subsurface salinity maximum restricts the depth to around 40 m. The nighttime convection is severely limited by either a small change in the surface forcing or the horizontal advection of slightly cooler waters from the east; we are unable to determine which is the dominant mechanism in the present case. The reduced mixing leads to an increase of the diurnal variation of sea surface temperature to over 1°C. The estimated net surface heat flux from the atmosphere to the ocean was found to be not significantly different from zero at 10 W m?2, in agreement with recent measurements. The net surface heat flux during the period of the heat budget experiment, which took place on the equator, was substantially higher at 65 W m?2. Changes of in situ temperature are found to be dominated by advection. The vertical velocity is estimated to be of order 10 m d?1 and to be caused by advection along east-west sloping density surfaces. Changes to the temperature structure of the upper ocean induced by motions with a timescale of a few days (possibly planetary waves) are found to be significantly greater than longer-term wind-induced upwelling or advectio

    Coming home to mother

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    Gift of Dr. Mary Jane Esplen.Piano vocal [instrumentation]We love to think of years ago [first line]We are coming home to Mother [first line of chorus]A flat [key]Piano [tempo]House, families, birds, photograph of M.E. Mollins [illustration]Popular song [form/genre]Publisher's advertisement on inside front [note]Mediatoon by G.A. Boyton [note

    Glider observations of enhanced deep water upwelling at a shelf break canyon: a mechanism for cross-slope carbon and nutrient exchange

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    Using underwater gliders we have identified canyon driven upwelling across the Celtic Sea shelf-break, in the vicinity of Whittard Canyon. The presence of this upwelling appears to be tied to the direction and strength of the local slope current, which is in itself highly variable. During typical summer time equatorward flow, an unbalanced pressure gradient force and the resulting disruption of geostrophic flow can lead to upwelling along the main axis of two small shelf break canyons. As the slope current reverts to poleward flow, the upwelling stops and the remnants of the upwelled features are mixed into the local shelf water or advected away from the region. The upwelled features are identified by the presence of sub-pycnocline high salinity water on the shelf, and are upwelled from a depth of 300 m on the slope, thus providing a mechanism for the transport of nutrients across the shelf break onto the shelf

    M.E. Church exterior

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    A monochrome postcard of the M.E. Church in Georgetown, Delaware. The church was made out of brick and had a tall tower on its corner. Writing on the right indicates that the author was having a good time. Mrs. P. H. Adkins of Milton, Delaware, received this postcard. A postmark on the back indicates that this postcard was mailed from Georgetown, Delaware. The postage stamp is a one-cent U.S. #300, Benjamin Franklin. The back of the postcard is labeled 75.00 and 0240

    M.E. Church exterior

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    A monochrome postcard of the M.E. Church in Georgetown, Delaware. The church was made out of brick and had a tall tower on its corner. Writing on the right indicates that the author was having a good time. Mrs. P. H. Adkins of Milton, Delaware, received this postcard. A postmark on the back indicates that this postcard was mailed from Georgetown, Delaware. The postage stamp is a one-cent U.S. #300, Benjamin Franklin. The back of the postcard is labeled 75.00 and 0240

    On using Directional Information for Parameter Space Decomposition in Ellipse Detection

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    In this paper we use the parametric polar representation to extend the application of edge directional information from circle to ellipse extraction. As a result we obtain a mapping which decomposes the parameter space required for ellipse extraction into two independent sub-spaces and one final histogram accumulator. The mapping includes the tangent of the angle of the first and second directional derivatives. These tangents are computed by considering edge direction at two border points. We show that the use of gradient information for parameter space decomposition avoids the intensive point labelling imposed by geometric constraints used by other approaches

    La fecondazione assistita dopo dieci anni di legge 40 : il punto di vista del costituzionalista

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    The Author of this paper adds the point of view of the constitutionalist to the debate on the Italian statute n.40/1994 on assisted reproduction illustrated by Flamigni and Mori in their work. The paper ends with a reflection on the recent decision n. 162/2014 issued by the Constitutional Court, which has declared the illegitimacy of the prohibition of heterologous reproduction

    L'approvazione della legge Cirinnà : fra riconoscimento dei diritti e scontro ideologico

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    The New Italian Law on Civil Unions: Between Rights Recognition and Ideological Clash Abstract: The author examines the coming into force of the first Italian law on civil unions, which, for the first time, grants protection for both homosexual and different sex couples

    La Corte costituzionale chiude la porta agli scienziati in nome della dignità dell’embrione

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    This essay aims to analize decision no. 84 of 2016 of the Italian Constitu-tional Court, on the matter of scientific research on embryos. In particular the essay dwells with the problematic acknowledgement of the embryo dignity. The Author considers this aspect in the context of the relation between sci-entific evolution and legislative discretionality, taking into account the other deci-sions of the Court on the matter of medically assisted procreation
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