Cassini measurements of cold plasma in the ionosphere of Titan     

Wahlund JE  Boström R  Gustafsson G  Gurnett DA  Kurth WS  Pedersen A  Averkamp TF  Hospodarsky GB  Persoon AM  Canu P  Neubauer FM  Dougherty MK  Eriksson AI  Morooka MW  Gill R  André M  Eliasson L  Müller-Wodarg I 《Science (New York, N.Y.)》2005,308(5724):986-989

The Cassini Radio and Plasma Wave Science (RPWS) Langmuir probe (LP) sensor observed the cold plasma environment around Titan during the first two flybys. The data show that conditions in Saturn's magnetosphere affect the structure and dynamics deep in the ionosphere of Titan. The maximum measured ionospheric electron number density reached 3800 per cubic centimeter near closest approach, and a complex chemistry was indicated. The electron temperature profiles are consistent with electron heat conduction from the hotter Titan wake. The ionospheric escape flux was estimated to be 10(25) ions per second.  相似文献   

Evidence of early pyrometallurgy in the kerman range in iran     

Dougherty RC  Caldwell JR 《Science (New York, N.Y.)》1966,153(3739):984-985

Physical and chemical anal ysis of pottery fragments, including a crucible shard and ore samples from Tal-i-Iblis, Iran, suggests that copper smelting may have been well advantced late in the fifth millennium B.C.  相似文献   

Electromyographic and pressure studies of the esophagus of the sheep     

R W Dougherty  K J Hill  H M Cook  J L Riley 《American journal of veterinary research》1971,32(8):1247-1252

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The effect of scald-water temperature on the histologic appearance of chicken skin     

E Dougherty  H R Seibold 《Avian diseases》1965,9(4):570-578

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Identification of a dynamic atmosphere at Enceladus with the Cassini magnetometer     

Dougherty MK  Khurana KK  Neubauer FM  Russell CT  Saur J  Leisner JS  Burton ME 《Science (New York, N.Y.)》2006,311(5766):1406-1409

The Cassini magnetometer has detected the interaction of the magnetospheric plasma of Saturn with an atmospheric plume at the icy moon Enceladus. This unanticipated finding, made on a distant flyby, was subsequently confirmed during two follow-on flybys, one very close to Enceladus. The magnetometer data are consistent with local outgassing activity via a plume from the surface of the moon near its south pole, as confirmed by other Cassini instruments.  相似文献   

Transcription Profile of Candidate Genes for the Acquisition of Competence During Oocyte Growth in Cattle     

IR Bessa  RC Nishimura  MM Franco  MAN Dode 《Reproduction in domestic animals》2013,48(5):781-789

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Micromechanical "Trampoline" magnetometers for use in large pulsed magnetic fields     

V Aksyuk  FF Balakirev  GS Boebinger  PL Gammel  RC Haddon  DJ Bishop 《Science (New York, N.Y.)》1998,280(5364):720-722

A silicon micromechanical magnetometer was constructed and successfully used in 60-tesla pulsed magnetic fields of less than 100-millisecond duration. The device is small, inexpensive to fabricate, and easy to use. It features a fast mechanical response (up to 50,000 hertz) and extremely high sensitivity yet is relatively robust against electrical and mechanical noise. Quantum oscillations in the magnetization of a 1-microgram sample of an organic superconductor, kappa-[bis(ethylenedithio)tetrathiafulvalene]2Cu(NCS)2, have been observed with this device.  相似文献   

Major compositional units of the moon: lunar prospector thermal and fast neutrons   总被引：2，自引：0，他引：2  

WC Feldman  BL Barraclough  S Maurice  RC Elphic  DJ Lawrence  DR Thomsen  AB Binder 《Science (New York, N.Y.)》1998,281(5382):1489-1493

Global maps of thermal and fast neutron fluxes from the moon suggest three end-member compositional units. A high thermal and low fast neutron flux unit correlates with the lunar highlands and is consistent with feldspathic rocks. The South Pole-Aitken basin and a strip that surrounds the nearside maria have intermediate thermal and fast neutron flux levels, consistent with more mafic rocks. There appears to be a smooth transition between the most mafic and feldspathic compositions, which correspond to low and high surface altitudes, respectively. The maria show low thermal and high fast neutron fluxes, consistent with basaltic rocks.  相似文献   

Lunar Fe and Ti abundances: comparison of lunar prospector and clementine data   总被引：3，自引：0，他引：3  

RC Elphic  DJ Lawrence  WC Feldman  BL Barraclough  S Maurice  AB Binder  PG Lucey 《Science (New York, N.Y.)》1998,281(5382):1493-1496

The Lunar Prospector neutron spectrometer data correlate well with iron and titanium abundances obtained through analysis of Clementine spectral reflectance data. With the iron and titanium dependence removed, the neutron spectrometer data also reveal regions with enhanced amounts of gadolinium and samarium, incompatible rare earth elements that are enriched in the final phases of magma crystallization. These regions are found mainly around the ramparts of the Imbrium impact basin but not around the other basins, including the much larger and deeper South Pole-Aitken basin. This result confirms the compositional uniqueness of the surface and interior of the Imbrium region.  相似文献   

Short-term soil nutrient impact in a real-time drain field soil moisture–controlled SDI wastewater disposal system     

Jiajie He  Mark Dougherty  Francisco J. Arriaga  John P. Fulton  Charles W. Wood  Joey N. Shaw  Clifford R. Lange 《Irrigation Science》2013,31(1):59-67

The Alabama Black Belt area is widespread of Vertisols that are generally unsuitable for conventional septic systems; nonetheless, systems of this type have been widely used in this region for decades. In order to explore alternatives for these conventional septic systems, a real-time soil moisture–controlled subsurface drip irrigation wastewater disposal system was integrated and field tested in a Houston Vertisol for 1 year. This automated disposal system effectively limited wastewater disposal during unfavorably wet drain field conditions. However, the resulting nutrient supply into the drain field was observed to be in surplus to crop growth requirements. Soil cores taken at the conclusion of the 1-year study indicated evidence of nitrate and phosphorus leaching. Available nitrates in the top 100 cm of soil showed a decreasing trend but were higher than all other parallel controls. Soil crop-available phosphorous in the soil increased below the drip line, as result that may be ascribed to soil cracking that was not properly controlled at the test site. Despite the demonstrated deficiencies, integrating timing of wastewater disposal with soil moisture conditions can supplement existing municipal or decentralized community wastewater treatment disposal systems.  相似文献