scholarly journals Examining spatiotemporal variability of urban particulate matter and application of high-time resolution data from a network of low-cost air pollution sensors

2019 ◽  
Vol 213 ◽  
pp. 579-584 ◽  
Author(s):  
Stephen Neil Feinberg ◽  
Ron Williams ◽  
Gayle Hagler ◽  
Judy Low ◽  
Larry Smith ◽  
...  
Keyword(s):  
Air Pollution ◽  
Particulate Matter ◽  
Time Resolution ◽  
Low Cost ◽  
High Time ◽  
Spatiotemporal Variability ◽  
High Time Resolution ◽  
Urban Particulate Matter ◽  
Resolution Data

scholarly journals A New Technique for Precise Stellar Photometry: Application to Small-Scale Activity of EV Lacertae

1995 ◽  
Vol 151 ◽  
pp. 133-134 ◽  
Author(s):  
B.E. Zhilyaev
Keyword(s):  
Time Resolution ◽  
High Time ◽  
Small Scale ◽  
High Time Resolution ◽  
Stellar Photometry ◽  
A New Technique ◽  
Ev Lac ◽  
Counting Statistics ◽  
Simple Integration ◽  
Resolution Data

AbstractA new prefiltering technique (PFT) for precise stellar photometry is described. It has been proved that the prefiltered and added high-time resolution data provide an increase in S/N ratio by factors 1.3 — 1.7 in comparison with simple integration. The PFT allows to detect event amplitudes which are comparable to that caused by counting statistics. Adopting the PFT, our observations reveal small-scale flare events in the subsecond range in EV Lac.

Field Survey of Trans-boundary Air Pollution with High Time Resolution at Coastal Sites on the Sea of Japan during Winter in Japan}

2006 ◽  
Vol 122 (1-3) ◽  
pp. 61-79 ◽  
Author(s):  
Masahide Aikawa ◽  
Takatoshi Hiraki ◽  
Motonori Tamaki ◽  
Mikio Kasahara ◽  
Akira Kondo ◽  
...  
Keyword(s):  
Air Pollution ◽  
Sea Of Japan ◽  
Time Resolution ◽  
Field Survey ◽  
High Time ◽  
The Sea Of Japan ◽  
High Time Resolution

PIXE ANALYSIS OF SPOT SAMPLES ON NEW TYPE OF PTFE ULTRA-MEMBRANE FILTER-TAPE MOUNTED IN AN AUTOMATED BETA-RAY ABSORPTION MASS MONITOR

2006 ◽  
Vol 16 (01n02) ◽  
pp. 95-101 ◽  
Author(s):  
KATSUMI SAITOH ◽  
KOICHIRO SERA ◽  
HITOSHI IMASEKI ◽  
MASYASHI SHINOHARA ◽  
MASAHIKO FUJIWARA
Keyword(s):  
Particulate Matter ◽  
Time Resolution ◽  
Membrane Filter ◽  
Direct Analysis ◽  
Atmospheric Particulate Matter ◽  
High Time ◽  
Chemical Information ◽  
High Time Resolution ◽  
Pixe Analysis ◽  
New Type

In order to obtain high time-resolution, i.e., chemical data of atmospheric particulate matter (PM) at one-hour intervals, we carried out direct analysis of suspended particulate matter (SPM) on hourly spot samples on a new type of PTFE ultra-membrane filter-tape mounted in an automated beta-ray absorption mass monitor by conventional PIXE. Analysis of hourly SPM spot samples revealed 20 elements ( Na , Mg , Al , Si , S , Cl , K , Ca , Mn , Fe , Co , Ni , Cu , Zn , Ga , As , Se , Br , Sr and Pb ) in total. Therefore, we are convinced that the chemical information that is obtained from high time-resolution PM spot samples on a PTFE membrane filter-tape mounted in an automated beta-ray absorption mass monitor will lead to new developments in PM research. Furthermore, elemental data obtained by the high time-resolution along with data for ionic species compositions, and SO 2, NO X and other gaseous air pollutants at the same level, will make possible the analysis of detailed air pollution phenomenon.

Feasibility study of ED-XRF analysis of atmospheric particulate matter samples collected with high time resolution

2015 ◽  
Vol 44 (4) ◽  
pp. 282-288 ◽  
Author(s):  
M. Giannoni ◽  
G. Calzolai ◽  
M. Chiari ◽  
F. Lucarelli ◽  
A. Mazzinghi ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Feasibility Study ◽  
Time Resolution ◽  
Atmospheric Particulate Matter ◽  
High Time ◽  
High Time Resolution ◽  
Atmospheric Particulate ◽  
Xrf Analysis

Towards Low-Cost, Ubiquitous High-Time Resolution Sensing for Terrestrial Spectrum

2020 ◽  
Vol 24 (1) ◽  
pp. 23-27
Author(s):  
Yeswanth Guddeti ◽  
Raghav Subbaraman ◽  
Moein Khazraee ◽  
Aaron Schulman ◽  
Dinesh Bharadia
Keyword(s):  
Time Resolution ◽  
Low Cost ◽  
High Time ◽  
High Time Resolution

scholarly journals How to Get the Best from Low-Cost Particulate Matter Sensors: Guidelines and Practical Recommendations

Sensors ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 3073 ◽  
Author(s):  
Erika Brattich ◽  
Alessandro Bracci ◽  
Alessandro Zappi ◽  
Pietro Morozzi ◽  
Silvana Di Sabatino ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Time Resolution ◽  
Low Cost ◽  
Weather Conditions ◽  
High Time Resolution ◽  
Hygroscopic Growth ◽  
Sensor Performance ◽  
Practical Guidelines ◽  
High Space ◽  
Guidelines And Recommendations

Low-cost sensors based on the optical particle counter (OPC) are increasingly being used to collect particulate matter (PM) data at high space and time resolution. In spite of their huge explorative potential, practical guidelines and recommendations for their use are still limited. In this work, we outline a few best practices for the optimal use of PM low-cost sensors based on the results of an intensive field campaign performed in Bologna (44°30′ N, 11°21′ E; Italy) under different weather conditions. Briefly, the performances of a series of sensors were evaluated against a calibrated mainstream OPC with a heated inlet, using a robust approach based on a suite of statistical indexes capable of evaluating both correlations and biases in respect to the reference sensor. Our results show that the sensor performance is sensibly affected by both time resolution and weather with biases maximized at high time resolution and high relative humidity. Optimization of PM data obtained is therefore achievable by lowering time resolution and applying suitable correction factors for hygroscopic growth based on the inherent particle size distribution.

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