Corrigendum to “Alternative metrics for spatially and temporally resolved ambient particle monitoring” [Journal of Aerosol Science 102 (2016) 96–104]

2020 ◽  
Vol 140 ◽  
pp. 105486
Author(s):  
Liem Pham ◽  
Heejung S. Jung
1997 ◽  
Vol 36 (4) ◽  
pp. 191-198
Author(s):  
G. Standen ◽  
P. J. Insole ◽  
K. J. Shek ◽  
R. A. Irwin

The application of laser diffraction particle monitoring to the performance optimisation of a pilot clarifier and full-scale rapid gravity filters (RGF), operating on water supply works in Hampshire, is described. Furthermore the dosing of powdered activated carbon (PAC) into the works' clarifiers has been evaluated in terms of RGF performance. A costly proposal to install a third filter medium was subsequently abandoned when it was found that particle numbers in the filtered water were consistently below 1×102/ml. Various combinations and doses of coagulants and flocculant aids, shown to give optimum particulates removal during intensive jar testing trials, were transferred to the pilot clarifier. Particle monitoring enabled a more accurate derivation of suitable blanket chemistry and optimum blanket heights than turbidity changes. Raw water turbidities were 10-15 NTU at start-up with corresponding counts beyond the upper limit of the particle monitor. An on-line dilution system was developed to overcome this problem. Latex bead (4.33 μm) and Lycopodium spore (4-5 μm) suspensions (about 1 × 109 particles) were injected into the pilot clarifier to assess the removal efficiency of Cryptosporidium-sized particles. Reductions of about 1.7 log and 2.6 log were achieved for the beads and spores, respectively. Particle distributions of various PAC's and a bentonite were obtained in order to assess their potential effects on the coagulation process during clarification. Bentonite was also beneficial as an on-line means of checking particle monitor response and calibration. The works' filters achieved 1.5 to 2.0 log removals of 2-5 μm particles without media addition or operational changes. Combined clarification and filtration gave better particulates removal than two-stage microfiltration.


2014 ◽  
Author(s):  
Greg Schivley ◽  
Joe Marriott ◽  
Matt Jamieson ◽  
Timothy J. Skone ◽  
Paulina Jaramillo

2018 ◽  
Vol 186 ◽  
pp. 05002
Author(s):  
Rodrigo Cortes ◽  
Denise Depoortere ◽  
Lucina Malaver

The skies of Northern Chile are considered among the best in the world for astronomy due to their geographical, climatic and atmospheric conditions. In fact, during the last several decades, a great number of astronomical observatories have been built by space research institutions devoted to space research, turning Chile into one of the countries with the greatest astronomical observation capacity in the world. Consequently, it is relevant to explore and assess the development of astronomy in Chile during the last ten years (2005-2015), carrying out a bibliometric analysis to extract traditional metrics, complemented with alternative metrics, to identify the Chilean production and scientific contribution of research in this field of knowledge. The results from traditional metrics, based on the information obtained in the Web of Science (WoS) database analyzed through InCites for the Astronomy & Astrophysics category indicate a sustained increase of the scientific production for the discipline during the last ten years. In particular, the Normalized Citation Impact of organizations and institutions conducting research in Chile is above the worldwide average. On the other hand, the alternative metrics, including for instance, the altmetrics types presented by the SCOPUS database, reflect that the Chilean research impact is much lower in the context of social networks.


2004 ◽  
Vol 6 (2/3) ◽  
pp. 313-320 ◽  
Author(s):  
Sheldon K. Friedlander ◽  
David Y.H. Pui

1999 ◽  
Vol 30 ◽  
pp. S111-S112 ◽  
Author(s):  
R.F. Holub ◽  
G.M. Reimer ◽  
P.K. Hopke ◽  
J. Hovorka ◽  
B. Krcmar ◽  
...  
Keyword(s):  

2011 ◽  
Vol 409 (10) ◽  
pp. 1811-1817 ◽  
Author(s):  
Guoxing Li ◽  
Maigeng Zhou ◽  
Yue Cai ◽  
Yajuan Zhang ◽  
Xiaochuan Pan

2001 ◽  
Vol 109 (suppl 4) ◽  
pp. 523-527 ◽  
Author(s):  
K Donaldson ◽  
V Stone ◽  
A Seaton ◽  
W MacNee

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