Ultraviolet background radiation from cosmic structure formation     

Francesco Miniati  rea Ferrara  Simon D. M. White  Simone Bianchi 《Monthly notices of the Royal Astronomical Society》2004,348(3):964-976

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On the optical counterparts of the X-ray sources in the Orion Nebula     

Luciana Bianchi 《Astrophysics and Space Science》1982,82(1):161-166

A great step forward in our knowledge of the X-ray emission from the Orion Nebula has recently been made possible by HEAO-2 observations. On the basis of these new data, and with the purpose of suggesting further analysis and observations, this note aims to contribute to on-going discussions about plausible optical counterparts, by considerations on those observational traits which have not yet been taken into account.  相似文献   

Non-marine bacteria in dialysis bags, in seawater     

Armand J. M. Bianchi  Maurice G. Bensoussan 《Marine pollution bulletin》1977,8(12):282-283

In a previous study we demonstrated the progressive disappearance of Escherichia coli populations upon contact with marine environment (Bianchi & Mircea, 1976). We have used the same experimental device to study the behaviour of other bacteria of enteric or terrigenous origin (Vibrio cholerae, Streptococcus faecalis, Staphylococcus aureus, Pseudomonas aeruginosa) when rejected into the sea.  相似文献   

Ground-Water Turbidity Resulting from Artificial Recharge   总被引：2，自引：0，他引：2  

Harry I. Nightingale  William C. Bianchi 《Ground water》1977,15(2):146-152

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Low-mass X-ray binaries in the LMC     

M. W. Pakull  K. Beuermann  L. P. Angebault  L. Bianchi 《Astrophysics and Space Science》1987,131(1-2):689-689

We report results on three low-mass X-ray binaries (LMXB) in the LMC, obtained with EXOSAT, IUE and ground-based (ESO) telescopes: LMC X-2 which appears to be Sco X-1-like, LHG 83 and LHG 87. The latter are two weaker sources first detected in the course of the HEAO-B LMC survey. They have faint optical counterparts of which LHG 87 was only recently identified by us. In X-rays, they are characterized by ultrasoft X-ray spectra possibly characteristic of black-hole primaries. LHG 83 furthermore shows evidence for X-ray ionization of the surrounding interstellar medium, similar to the He III region around the black-hole candidate LMC X-1. X-ray binaries with masses of compact objects in excess of 3 M and ultrasoft X-ray spectra are comparatively frequent in the LMC. We suggest that subcritical accretion onto black holes takes place in LHG 83 and LHG 87.Paper presented at the IAU Colloquium No. 93 on Cataclysmic Variables. Recent Multi-Frequency Observations and Theoretical Developments, held at Dr. Remeis-Sternwarte Bamberg, F.R.G., 16–19 June, 1986.  相似文献   

Soil thermal behavior in different moisture condition: an overview of ITER project from laboratory to field test monitoring     

Eloisa Di Sipio  David Bertermann 《Environmental Earth Sciences》2018,77(7):283

The thermal properties of soils can be considered one of the most important parameters for many engineering projects designing. In detail, the thermal conductivity plays a fundamental role when dimensioning ground heat exchangers, especially very shallow geothermal (VSG) systems, interesting the first 2 m of depth from the ground level. However, the determination of heat transfer in soils is difficult to estimate, because depends on several factors, including, among others, particle size, density, water content, mineralogy composition, ground temperature, organic matter. The performance of a VSG system, as horizontal collectors or special forms, is strongly correlated to the kind of sediment at disposal and suddenly decreases in case of dry-unsaturated conditions in the surrounding soil. Therefore, a better knowledge of the relationship between thermal conductivity and water content is required for understanding the VSG systems behavior in saturated and unsaturated conditions. Key challenge of ITER project, funded by European Union, is to understand how to enhance the heat transfer of the sediments surrounding the pipes, taking into account the interactions between the soil, the horizontal heat exchangers and the surrounding environment. In detail, changes of soil moisture content in the same climatic conditions and under the same thermal stress for five different soil mixtures have been monitored in the ITER test site. The relationship with precipitation and natural/induced ground temperature variations, reaching also water freezing point, are here discussed.  相似文献   

Tectonically driven deposition and landscape evolution within upland incised valleys: Ambra Valley fill,Pliocene–Pleistocene,Tuscany, Italy          下载免费PDF全文

Valeria Bianchi  Massimiliano Ghinassi  Mauro Aldinucci  Jacopo Boaga  Andrea Brogi  Rita Deiana 《Sedimentology》2015,62(3):897-927

Sedimentation in the upstream reaches of incised valleys is predominantly of alluvial origin and, in most cases, independent from relative sea‐level or lake‐level oscillations. Preserved facies distributions record the depositional response to a combination of allogenic factors, including tectonics, climate and landscape evolution. Tectonics drive fluvial aggradation and degradation through local changes in gradient, both longitudinal and transverse to the valley slope. This article deals with a Pliocene–Pleistocene fluvial valley fill developed in the north‐eastern shoulder of the Siena Basin (Northern Apennines, Italy). Evolution of the valley was not influenced by sea‐level or lake‐level changes and morphological and depositional evolution of valley resulted from extensional tectonics that gave rise to normal and oblique‐slip faults orthogonal and parallel to the valley axis. Data from both field observations and geophysical study are interpreted to develop a comprehensive tectono‐sedimentary model of coeval longitudinal and lateral tilting of the developing alluvial plain. Longitudinal tilting was generated by a transverse, upstream‐dipping normal fault that controlled the aggradation of fining‐upward strata sets. Upstream of the fault zone, valley back‐filling generated an architecture similar to that of classic, sea‐level‐controlled, coastal incised valleys. Downstream of the fault zone, valley down‐filling was related to an overwhelming sediment supply sourced and routed from the active fault zone itself. Lateral tilting was promoted by the activity of a fault oriented parallel to the valley axis, as well as by different offsets along near orthogonal faults. As a result, the valley trunk system experienced complex lateral shifts, which were governed by interacting fault‐generated subsidence and by the topographic confinement of progradational, flank‐sourced alluvial fans.  相似文献   

Mapping a coastal transition in braided systems: an example from the Precipice Sandstone,Surat Basin     

V. Bianchi  F. Zhou  D. Pistellato  M. Martin  S. Boccardo  J. Esterle 《Australian Journal of Earth Sciences》2018,65(4):483-502

The Precipice Sandstone is traditionally interpreted as a braided fluvial deposit that transitions upwards into meandering channel deposits responding to a rise in base level that eventually deposits the overlying alluvial to lacustrine Evergreen Formation. This study found sedimentary evidence of tidal to marine influence within the Precipice Sandstone coincident with avulsion and diversion of the system from southward to northward-flowing channels as the system was transgressed. The north-flowing channels are interpreted to debouch into a shallow restricted marine embayment with tide and wave influence, which provides an alternative insight into this unit and suggests a Lower Jurassic north or northeasterly marine connection. The Precipice Sandstone is a regional aquifer, in places hosts hydrocarbons and has been considered as a storage unit for CO₂ geosequestration. Outcrop analogues can provide geometries to accompany facies interpreted from sedimentary structures that are observable in core, to assist in characterising reservoir heterogeneity.  相似文献   

Hurricane Katrina impact on water quality in the East Pearl River,Mississippi     

Alan M. Shiller  Moo-Joon Shim  Laodong Guo  Thomas S. Bianchi  Richard W. Smith  Shuiwang Duan 《Journal of Hydrology》2012

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Groundwater connections under a barrier beach: A case study in the Venice Lagoon     

John Rapaglia  Eloisa Di Sipio  Henry Bokuniewicz  Gian Maria Zuppi  Luca Zaggia  Antonio Galgaro  Aaron Beck 《Continental Shelf Research》2010

The flow of groundwater beneath barrier islands has been cited as a possible pathway for salt water and chemical exchange between a protected embayment and the open sea. Evidence is presented that identifies an exchange of groundwater through a highly permeable paleoinlet along the barrier beach of Cavallino, which separates the northern Venice Lagoon from the Adriatic Sea. We utilized both point measurements of submarine groundwater discharge (SGD) and a geophysical investigation of the subsurface resistivity to analyze the movement of saline groundwater. Discharge of groundwater and associated nutrients, was higher at the site of a former inlet than at a similar site along the barrier and modulated by the difference in tidal water level between the lagoon and Adriatic Sea. If the measured conditions are typical, storm surge barriers could potentially result in a saline groundwater flow of up to 1.5×10⁶ m³ d⁻¹ into the lagoon.  相似文献