scholarly journals A comparative study of soiling on solar mirrors in Portugal and Morocco: Preliminary results for the dry season

2019 ◽  
Author(s):  
Ricardo Conceição ◽  
Ahmed Alami Merrouni ◽  
Daniel Lopes ◽  
Azouzoute Alae ◽  
Hugo Gonçalves Silva ◽  
...  
Keyword(s):  
Comparative Study ◽  
Dry Season ◽  
Preliminary Results

MR imaging features and tumor biomarkers of screen-detected and non-screen detected breast cancers: preliminary results of a comparative study

2018 ◽  
Vol 52 ◽  
pp. 350-355
Author(s):  
Evangelia Panourgias ◽  
Charis Bourgioti ◽  
Andreas Koureas ◽  
Vassilis Koutoulidis ◽  
Georgios Metaxas ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Comparative Study ◽  
Tumor Biomarkers ◽  
Imaging Features ◽  
Breast Cancers ◽  
Preliminary Results

scholarly journals Column water vapor determination in night period with a lunar photometer prototype

2013 ◽  
Vol 6 (1) ◽  
pp. 767-793
Author(s):  
A. Barreto ◽  
E. Cuevas ◽  
B. Damiri ◽  
P. M. Romero ◽  
F. Almansa
Keyword(s):  
Water Vapor ◽  
Comparative Study ◽  
Global Positioning System ◽  
High Mountain ◽  
Positioning System ◽  
Gps Receiver ◽  
Preliminary Results ◽  
Global Positioning ◽  
Lc Filter ◽  
Night Period

Abstract. In this paper we present the preliminary results of atmospheric column integrated water vapor (PWV) obtained with a new Lunar Cimel photometer (LC) at the high mountain Izaña Observatory in the period July–August, 2011. We have compared nocturnal PWV from LC with PWV from a Global Positioning System (GPS) receiver and nighttime radiosondes (RS92). LC data have been calibrated using the Lunar Langley Method (LLM). We complemented this comparative study using quasi-simultaneous daytime PWV from Cimel AERONET (CA), GPS and RS92. Comparison of daytime PWV from CA shows differences against GPS and RS92 up to 0.18 cm. Two different filters, with and approximate bandwidth of 10 nm and central wavelengths at 938 nm (Filter#1) and 937 nm (Filter#2), were mounted into the LC. Filter#1 is currently used in operational AERONET sunphotometers. PWV obtained with LC-Filter#1 showed an overestimation above 0.18 and 0.25 cm compared to GPS and RS92, respectively, meanwhile Filter#2, with a reduced out-of-band radiation, showed very low differences compared with the same references (≤0.03 cm). These results demonstrate the ability of the new lunar photometer to obtain accurate and continuous PWV measurements at night in addition to the notably influence of the filter's transmissivity response on PWV determination at nighttime. The use of enhanced bandpass filters in lunar photometry, which is affected by more important inaccuracies than sun-photometry, is necessary to infer PWV with similar precision than AERONET.

164Selective yuxtapectoral axillary block versus a proximal humeral approach. A comparative study. Preliminary results

2006 ◽  
Vol 31 (5) ◽  
pp. 71-71
Author(s):  
S CASTELLARNAU ◽  
A GARCIAMURET ◽  
X GONZALEZCARRASCO ◽  
J CASAS ◽  
M MORAL
Keyword(s):  
Comparative Study ◽  
Axillary Block ◽  
Preliminary Results

scholarly journals A comparative study of media, media use and ethnolinguistic vitality in bilingual communities

2011 ◽  
Vol 2 (1) ◽  
pp. 283-301 ◽  
Author(s):  
Tom Moring ◽  
Catharina Lojander-Visapää ◽  
Andrea Nordqvist ◽  
Laszlo Vincze ◽  
Nadja Mänty
Keyword(s):  
Comparative Study ◽  
Media Use ◽  
Institutional Analysis ◽  
Comparative Perspective ◽  
Minority Languages ◽  
Ethnolinguistic Vitality ◽  
Preliminary Results ◽  
South Tyrol ◽  
Bilingual Speakers ◽  
Bilingual Communities

This paper presents some preliminary results from acomparative study of interrelations between identity (in terms of subjectively identified identity); media (in terms of completeness in supply); media use (in terms of choice of language); and EV among bilingual speakers of autochthonous minority languages. It builds on studies that are carried out among German speakers in South Tyrol, Hungarian speakers in Romania and Swedish speakers in Finland, combining institutional analysis and quantitative surveys in a comparative perspective

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