The High-Resolution Coronal Imager (Hi-C)     

Ken Kobayashi  Jonathan Cirtain  Amy R. Winebarger  Kelly Korreck  Leon Golub  Robert W. Walsh  Bart De Pontieu  Craig DeForest  Alan Title  Sergey Kuzin  Sabrina Savage  Dyana Beabout  Brent Beabout  William Podgorski  David Caldwell  Kenneth McCracken  Mark Ordway  Henry Bergner  Richard Gates  Sean McKillop  Peter Cheimets  Simon Platt  Nick Mitchell  David Windt 《Solar physics》2014,289(11):4393-4412

The High-Resolution Coronal Imager (Hi-C) was flown on a NASA sounding rocket on 11 July 2012. The goal of the Hi-C mission was to obtain high-resolution (≈?0.3?–?0.4′′), high-cadence (≈?5 seconds) images of a solar active region to investigate the dynamics of solar coronal structures at small spatial scales. The instrument consists of a normal-incidence telescope with the optics coated with multilayers to reflect a narrow wavelength range around 19.3 nm (including the Fe xii 19.5-nm spectral line) and a 4096×4096 camera with a plate scale of 0.1′′?pixel^?1. The target of the Hi-C rocket flight was Active Region 11520. Hi-C obtained 37 full-frame images and 86 partial-frame images during the rocket flight. Analysis of the Hi-C data indicates the corona is structured on scales smaller than currently resolved by existing satellite missions.  相似文献   

Optimized Herschel/PACS photometer observing and data reduction strategies for moving solar system targets     

C. Kiss  T. G. Müller  E. Vilenius  A. Pál  P. Santos-Sanz  E. Lellouch  G. Marton  E. Verebélyi  N. Szalai  P. Hartogh  J. Stansberry  F. Henry  A. Delsanti 《Experimental Astronomy》2014,37(2):161-174

The “TNOs are Cool!: A survey of the trans-Neptunian region” is a Herschel Open Time Key Program that aims to characterize planetary bodies at the outskirts of the Solar System using PACS and SPIRE data, mostly taken as scan-maps. In this paper we summarize our PACS data reduction scheme that uses a modified version of the standard pipeline for basic data reduction, optimized for faint, moving targets. Due to the low flux density of our targets the observations are confusion noise limited or at least often affected by bright nearby background sources at 100 and 160 \(\mu \) m. To overcome these problems we developed techniques to characterize and eliminate the background at the positions of our targets and a background matching technique to compensate for pointing errors. We derive a variety of maps as science data products that are used depending on the source flux and background levels and the scientific purpose. Our techniques are also applicable to a wealth of other Herschel solar system photometric observations, e.g. comets and near-Earth asteroids. The principles of our observing strategies and reduction techniques for moving targets will also be applicable for similar surveys of future infrared space projects.  相似文献   

Leitfaden der Pollenbestimmung fur Mitteleuropa und angrenzende Gebiete. H.‐J. Beug. Publisher Verlag Friedrich Pfeil,Munich, 2004 (542 pp. 120 plates, 12 tables) ISBN 3 89937 043 0     

Henry Hooghiemstra 《第四纪科学杂志》2006,21(1):105-105

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Visit to the British Museum (natural history), cromwell road: Saturday,March 20th, 1897     

Henry Woodward 《Proceedings of the Geologists' Association. Geologists' Association》1897,15(3):85-87

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Consolidation with threshold gradients     

Florica Pascal  Henry Pascal  D. W. Murray 《国际地质力学数值与分析法杂志》1981,5(3):247-261

Evidence for threshold gradients is reviewed. The consolidation problem, with threshold gradient, is properly formulated and solved numerically. An approximate analytical solution is also developed. The influence of a threshold gradient on the time rate of settlement is examined, and it is shown that by modifying the definition of the degree of consolidation a good approximation to the threshold gradient problem can be obtained directly from the Terzaghi solution. It is also shown that threshold gradients will have no influence on odometer testing and their effect is, therefore, to reduce the primary compression below that predicted from standard tests.  相似文献   

On the use of the Proudman—Heaps tidal theorem     

M. G. G. Foreman  L. M. Delves  I. Barrodale  R. F. Henry 《Geophysical Journal International》1980,63(2):467-478

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CHANGES IN AGRICULTURAL PRODUCTION IN METROPOLITAN AREAS *     

Henry W. Lawrence 《The Professional geographer》1988,40(2):159-175

Different types of farming in metropolitan areas show both negative and positive responses to urban and nonurban forces of change. The variety of impacts has been neglected by most spatial intensity models and land use studies. This study examines census data from 1949 to 1982 in seven major U.S. metropolitan areas for six commodity types to detect regular patterns of changes in sales value, area harvested, number of animals, and intensity of production. Results show large declines in dairy farming, followed by poultry and fruit and nuts; some recent recovery in vegetable crops; and steady increases in both low value field crops and high value horticultural specialties. A trend toward polarization of metropolitan agriculture is indicated. Results also show differences between inner and outer urban fringe areas and a decline in the differential in intensity of production between metropolitan and non-metropolitan agriculture.  相似文献   

Detection of individual normal modes of oscillation of the Sun in the period range from 2 hr to 10 min in solar diameter studies     

Bos  Randall J.  Hill  Henry A. 《Solar physics》1983,82(1-2):89-102

Solar Physics - New observations of solar oscillations are reported. Power density spectra derived from these observations reveal narrow-band oscillations that are spatially global, have spatial...  相似文献   

An operational method for the real-time monitoring of E. coli numbers in bathing waters     

Lebaron P  Henry A  Lepeuple AS  Pena G  Servais P 《Marine pollution bulletin》2005,50(6):652-659

The aim of this study was to investigate the potential application of the beta-d-glucuronidase (GLUase) activity measurement for the routine detection and quantification of E. coli in marine bathing waters. GLUase activity was measured as the rate of hydrolysis of 4-methylumbelliferyl-beta-d-glucuronide. Culturable E. coli were quantified by the most probable number (MPN) microplate method. Both methods were applied to a large set of seawater samples. Significant correlation was found between the log of GLUase activity and the log of culturable E. coli. The mean coefficient of variation (CV) of the GLUase activity was less than 15% at concentrations around the current standards of International regulations whereas the CV of the microplate method was around 30%. When samples were stored at 4 degrees C and 20 degrees C, the mean CV of the GLUase activity remained below 15% up to 6 hours after sample collection whereas the range of variation of the microplate method varied between 10 and 50%. We concluded that the GLUase activity is an operational, reproducible, simple, very rapid and low cost method for the real-time enumeration of E. coli in bathing waters and should be preferred to the microplate method. The GLUase activity method should be routinely applied to the rapid enumeration of E. coli in recreational waters and recommendations for its application were suggested to water quality managers.  相似文献   

    

W. A. Heiskanen  J. Lamar Worzel  G. Lynn Shurbert  Paul Herget  Clair E. Ewing  Carl I. Aslakson  Simo Laurila  John R. Williams  David T. Williams  Bertil Hallert  Robert C. Fitzpatrick  W. M. Markowitz  S. P. Worden  Henry Wild Jr  W. Kneissl 《Journal of Geodesy》1955,29(2):55-78

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