ELEVENTH ANNUAL MEETING OF THE AMERICAN FOLK-LORE SOCIETY     

Newell WW 《Science (New York, N.Y.)》1899,9(214):173-174

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OUR VACANT PUBLIC LANDS     

Newell FH 《Science (New York, N.Y.)》1893,21(532):198-199

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Holocene changes in sea level: evidence in micronesia     

Shepard FP  Curray JR  Newman WA  Bloom AL  Newell ND  Tracey JI  Veeh HH 《Science (New York, N.Y.)》1967,157(3788):542-544

Investigation of 33 islands, scattered widely across the Caroline and Marshall Island groups in the Central Pacific revealed no emerged reefs in which corals had unquestionably formed in situ, or other direct evidence of postglacial high stands of sea level. Low unconsolidated rock terraces and ridges of reefflat islands, mostly lying between tide levels, were composed of rubble conglomerates; carbon-14 dating of 11 samples from the conglomerates so far may suggest a former slightly higher sea level (nine samples range between 1890 and 3450 and one approaches 4500 years ago). However, recent hurricanes have produced ridges of comparable height and material, and in the same areas relics from World War II have been found cemented in place. Thus these datings do not in themselves necessarily indicate formerly higher sea levels. Rubble tracts are produced by storms under present conditions without any change in datum, and there seems to be no compelling evidence that they were not so developed during various periods in the past.  相似文献   

Use of overlap studies to evaluate method changes in water chemistry protocols     

Avis D. Newell  Marilyn L. Morrison 《Water, air, and soil pollution》1993,67(3-4):433-456

Long-term monitoring projects are usually plagued with method changes that occur in the midst of the monitoring record. Such changes can affect the data, resulting in observations of long-term trends that reflect the change in methods rather than the monitored system. This article describes two statistical approaches to evaluate the effect of method changes, illustrated by several examples from the U.S. Environmental Protection Agency's Long-Term Monitoring Project, a study of the effects of acidic deposition on surface water chemistry. Structural regression models or paired t-tests were applied to various overlapping datasets to determine whether statistically significant differences existed between methods. Statistically significant differences between method changes were seen for each of the following: different filter types, a change in anion analysis from colorimetric to ion Chromatographic techniques, and a change in sample collection method from an integrated hose sampler to a Kemmerer sampler. The characteristics under which each statistical approach was applied are discussed, as are considerations regarding calibration of the older portions of the data.  相似文献   

Determination of nitrosodimethylamine in the low parts per billion     

N E Newell  H R Sisken 《Journal of agricultural and food chemistry》1972,20(3):711-713

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An ultrasonographic off-set system for examination of equine tendons and ligaments.     

A K Wood  W H Newell  R P Borg 《American journal of veterinary research》1991,52(12):1945-1947

In a dorsal plane, an improved ultrasonographic off-set system was used to obtain serial ultrasonographic images with enhanced anatomic and pathologic detail of the tendons, ligaments, and associated structures of the limbs of 100 horses. The off-set provided good acoustic coupling between a linear array ultrasonographic transducer and the horse's skin. A water-soluble gel contained within the off-set had acoustic properties similar to those of mammalian soft tissues.  相似文献   

The control of samonellae affecting swine and man     

K W Newell  L P Williams 《Journal of the American Veterinary Medical Association》1971,158(1):89-98

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Manure management practices applied to a seven‐course rotation on a sandy soil: effects on nitrate leaching     

M. Shepherd  P. Newell‐Price 《Soil Use and Management》2013,29(2):210-219

This experiment tested whether it was possible to incorporate broiler litter (BL) or cattle farmyard manure (FYM) into a 7‐yr arable rotation on a sandy soil without causing an increase in nitrate‐nitrogen (NO₃‐N) leaching. Four manure treatments (with adjusted fertilizer inputs), varying in frequency and timing of application, were imposed on the rotation and compared with a control that received inorganic fertilizer according to recommended rates. Over seven winters, the annual average NO₃‐N leached from the inorganic fertilizer treatment (control) was 39 kg/ha in 183 mm drainage. Total manure N loadings over the period of the experiment ranged between 557 and 1719 kg/ha (80–246 kg/ha/yr) for the four treatments. Three of the four manure treatments significantly increased NO₃‐N leaching over the rotation (P < 0.001). Annual applications of FYM (1719 kg/ha manure N or 246 kg/ha/yr) increased NO₃‐N leaching by 39%. We hypothesize that this was due to increased mineralization of the organic N accumulating from repeated FYM applications. BL applied each year (1526 kg/ha manure N or 218 kg N/ha/yr) increased NO₃‐N leaching by 52% above the control; BL applied 5 of 7 yr (972 kg/ha manure N or 139 kg N/ha/yr on average) and including inadvisable autumn applications increased leaching by 50%. BL applied in late winter or early spring every 2–3 yr (557 kg/ha manure N or 80 kg N/ha/yr on average) resulted in NO₃‐N leaching similar to the control. This suggests that to avoid additional NO₃‐N leaching from manure use in an arable rotation, manure should not be applied every year and autumn applications should be avoided; there are real challenges where manure is used on an annual basis.  相似文献   

Estimates of variance components and repeatability for total forage yield in rye: implications for breeding     

Stephen L. Webb  Jagadeesh Mosali  Jerry L. Baker  Mark A. Newell 《Plant Breeding》2013,132(6):580-585

Cereal rye (Secale cereale L.) is an important forage crop in the USA for stocker cattle (Bos sp.) production, thus making forage yield an important breeding objective for the crop. However, little information is known about the repeatability for forage yield in this crop. The objectives of this research were to: (i) estimate variance components for forage yield from long‐term variety trials, (ii) estimate the repeatability for forage yield and (iii) relate this to breeding strategies for increased forage yield in rye. Trials were conducted over 14 years where 97 USA open‐pollinated varieties (OPVs) were evaluated. Repeatability ranged from 0.57 to 0.86 when the data were analysed by year for the 3 years with significant genotype main effects. Possible explanations for the lack of significant genotype main effects are discussed. Practical implications of these findings indicate that the development of improved cultivars with greater forage yield will require improved methods of selection based on family performance rather than the current methods based primarily on single plant visual selection.  相似文献   

Electromechanical properties of graphene drumheads     

Klimov NN  Jung S  Zhu S  Li T  Wright CA  Solares SD  Newell DB  Zhitenev NB  Stroscio JA 《Science (New York, N.Y.)》2012,336(6088):1557-1561

We determined the electromechanical properties of a suspended graphene layer by scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) measurements, as well as computational simulations of the graphene-membrane mechanics and morphology. A graphene membrane was continuously deformed by controlling the competing interactions with a STM probe tip and the electric field from a back-gate electrode. The probe tip-induced deformation created a localized strain field in the graphene lattice. STS measurements on the deformed suspended graphene display an electronic spectrum completely different from that of graphene supported by a substrate. The spectrum indicates the formation of a spatially confined quantum dot, in agreement with recent predictions of confinement by strain-induced pseudomagnetic fields.  相似文献