Dark Matter in Wide Triple Systems of Galaxies     

Valentin P. Dolgachev  Arthur D. Chernin 《Astrophysics and Space Science》1997,252(1-2):151-153

Numerical models for wide triplets of galaxies are developed, and a statistical estimate of the dark matter content in these systems is derived. In a typical system, the mass of dark matter proves to be (1.5 - 3) × 1012h-1 M.  相似文献   

A GENERALISED ANALYTICAL RELATIVE ORIENTATION PROCEDURE AND ITS APPLICATION TO APOLLO 14 CLOSE UP PHOTOGRAPHY OF THE LUNAR SURFACE     

D. W. G. Arthur 《The Photogrammetric Record》1972,7(40):442-453

Close up photographs of the lunar surface obtained by the Apollo 14 astronauts presented unusual problems in relative orientation caused by essentially different directions of the camera axes. The problem was resolved by dividing each large unknown rotation into two parts, one of which was a large known part and the other was a small unknown part. The method succeeds when the unknown rotation elements can be initially estimated to about 10°.  相似文献   

A Catalogue of British Fossil Vertebrata     

Arthur Smith Woodward  Charles Davies Sherborn 《Proceedings of the Geologists' Association. Geologists' Association》1889,11(5):I-II

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Excursion to Walton heath and Headley with special reference to the supposed Pliocene deposits: Saturday,June 11th, 1921     

George W. Young  Ernest Arthur Turner 《Proceedings of the Geologists' Association. Geologists' Association》1921,32(4):231-235

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Excursion to the North Downs in Kent: Saturday,July 17th, 1920     

Arthur L. Leach  M.J. Bassett 《Proceedings of the Geologists' Association. Geologists' Association》1921,32(1):36-IN1

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Further notes on the geology of Shooter's Hill,Kent     

Arthur L. Leach 《Proceedings of the Geologists' Association. Geologists' Association》1930,41(3):343-IN11

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Field meeting in the Ravensbourne valley at Hayes and Keston: Saturday,July 1st, 1933     

Arthur L. Leach 《Proceedings of the Geologists' Association. Geologists' Association》1934,45(1):70-71

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The 16th Workshop on Antarctic Meteorology and Climate and 6th Year of Polar Prediction in the Southern Hemisphere Meeting     

David H.BROMWICH  Matthew A.LAZZARA  Arthur M.CAYETTE  Jordan G.POWERS  Kirstin WERNER  John J.CASSANO  Steven R.COLWELL  Scott CARPENTIER  Xun ZOU 《大气科学进展》2022,39(3):536-542

1. Overview In June 2021, the 16th Workshop on Antarctic Meteorology and Climate (WAMC) and the 6th Year of Polar Prediction in the Southern Hemisphere (YOPP-SH) Meeting (http://polarmet.osu.edu/WAMC;021/) were held online and hosted by the Polar Meteorology Group at Byrd Polar and Climate Research Center, The Ohio State University, Columbus,Ohio (Fig. 1).  相似文献   

A Temporal Comparison of Drought Impacts and Responses in the New York City Metropolitan Area   总被引：1，自引：0，他引：1  

Arthur T. DeGaetano 《Climatic change》1999,42(3):539-560

Climate impact analyses seldom examine temporal changes in the impacts and responses associated with climate anomalies. Newspaper reports, quantitative agricultural and water resource data and a survey of drought sensitive segments of society are used to compare the impacts and responses of a 1995 drought in the New York City metropolitan area to those experienced during five previous droughts. Impacts related to surface water supplies dominated each of the drought periods studied. Over time, however, changes in water consumption habits and available reservoir capacity lead to an increase in impact severity for similar meteorological conditions. To account for these non-climatic influences on water storage, a method to adjust for trends in available reservoir storage and water use is developed and implemented. Once adjusted, a fairly strong (R² = 70.9%) exponential relationship exists between the minimum reservoir level and Palmer Drought Severity Index experienced during each drought period. Unadjusted levels exhibit a considerably weaker (R² = 49.0%) relationship. Changes in water consumption and reservoir capacity also influenced the enactment of voluntary and ultimately mandatory water conservation measures. These restrictions were responsible for business and industrial impacts that varied through time as technology evolved and societal attitudes changed. Minor time-dependent changes were also evident in agricultural and wildfire impacts.  相似文献   

Integrating Stalagmite, Vertebrate, and Pollen Sequences to Investigate Holocene Vegetation and Climate Change in the Southern Midwestern United States     

Rhawn F. Denniston  Luis A. Gonzalez  Holmes A. Semken  Jr.  Yemane Asmerom  Richard G. Baker  Heather Recelli-Snyder  Mark K. Reagan  E. Arthur Bettis  III 《Quaternary Research》1999,52(3):381

Speleothem carbon and oxygen isotopic records from Onondaga Cave, south-central Missouri, and Beckham Creek Cave, north-central Arkansas, are compared with the Cupola Pond and Oldfield Swamp pollen series from southeastern Missouri and the Rodgers Shelter and Modoc Shelter vertebrate biostratigraphic sequences from central Missouri and southwestern Illinois. Similar, and roughly contemporaneous, shifts between deciduous forest and steppe indicators throughout the Holocene are revealed in each database. These independent proxies record steppe conditions between approximately 9000 and 1500 cal yr B.P. A shift toward lighter speleothem carbon may reflect a change from warm and dry to cool and dry conditions between 4500 and 3000 yr B.P. The sensitive response of speleothem δ¹³C to changes in vegetation emphasizes their importance as paleoclimate records in an area containing few other millenial-scale climate proxies.  相似文献