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1. |
Record Nr. |
UNINA9910705411303321 |
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Titolo |
Geology and mineral deposits of the Venezuelan Guayana Shield / / edited by Gary B. Sidder, Andrés E. García, and Judith W. Stoeser |
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Pubbl/distr/stampa |
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Washington : , : United States Government Printing Office, , 1995 |
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Descrizione fisica |
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1 online resource (various pagings) : illustrations (some color), maps (some color) |
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Collana |
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U.S. Geological Survey bulletin ; ; 2124 |
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Soggetti |
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Geology - Venezuela |
Minerals - Venezuela |
Geology |
Minerals |
Guiana Highlands |
South America Guiana Highlands |
Venezuela |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Title from title screen (viewed August 28, 2014). |
Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/). |
Prepared as part of a cooperative project with the Corporación Venezolana de Guayana, Técnica Minera, C.A. |
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Nota di bibliografia |
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Includes bibliographical references. |
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2. |
Record Nr. |
UNINA9910557576903321 |
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Autore |
Hoshi Yoko |
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Titolo |
New Horizons in Time-Domain Diffuse Optical Spectroscopy and Imaging |
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Pubbl/distr/stampa |
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Basel, Switzerland, : MDPI - Multidisciplinary Digital Publishing Institute, 2020 |
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Descrizione fisica |
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1 online resource (246 p.) |
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Soggetti |
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Medicine and Nursing |
Neurosciences |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Sommario/riassunto |
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Jöbsis was the first to describe the in vivo application of near-infrared spectroscopy (NIRS), also called diffuse optical spectroscopy (DOS). NIRS was originally designed for the clinical monitoring of tissue oxygenation, and today it has also become a useful tool for neuroimaging studies (functional near-infrared spectroscopy, fNIRS). However, difficulties in the selective and quantitative measurements of tissue hemoglobin (Hb), which have been central in the NIRS field for over 40 years, remain to be solved. To overcome these problems, time-domain (TD) and frequency-domain (FD) measurements have been tried. Presently, a wide range of NIRS instruments are available, including commonly available commercial instruments for continuous wave (CW) measurements, based on the modified Beer-Lambert law (steady-state domain measurements). Among these measurements, the TD measurement is the most promising approach, although compared with CW and FD measurements, TD measurements are less common, due to the need for large and expensive instruments with poor temporal resolution and limited dynamic range. However, thanks to technological developments, TD measurements are increasingly being used in research, and also in various clinical settings. This Special Issue highlights issues at the cutting edge of TD DOS and diffuse optical tomography (DOT). It covers all aspects related to TD measurements, |
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including advances in hardware, methodology, the theory of light propagation, and clinical applications. |
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