scholarly journals Characterizing the size distribution of particles in urban stormwater by use of fixed-point sample-collection methods

Author(s):  
William R. Selbig ◽  
Roger T. Bannerman
2014 ◽  
Vol 11 (3) ◽  
pp. 1-15
Author(s):  
Ike Arisanti ◽  
Isti Fadah ◽  
Novi Puspitasari

This study purposes to analyze the influence of financial and non financial factors to prediction of the rating islamic bond in indonesia. The study used independent variable,that is financial factor (growth, size, profit sharing/fee, liquidity) and non financial factor ( secure and maturity) and dependent variable that is the rating of islamic bond. This study applied logistic regresion analysis with sample collection methods using purposive sampling. After selecting fixed criterias, there were 25 islamic bonds chosen with the numbers of 75 investigation from periods of 2010-2012. The result of this study showed that significantly effect the variable growth (X1) , size(X2), profit sharing/ fee (X3), liquidity (X4), secure (X5), maturity (X6) simultaneously to the rating prediction of islamic bond in indonesia. Partially, variable variables of growth (X1) , size (X2), profit sharing/ fee (X3) which referred not significant affecting to the rating prediction of islamic bond in indonesia. Meanwhile, variables of liquidity (X4), secure (X5), maturity ( X6) referred significant affecting to the rating prediction of islamic bond in indonesia.


2009 ◽  
Vol 37 (1) ◽  
pp. 42-44 ◽  
Author(s):  
Luca Giovanella ◽  
Luca Ceriani ◽  
Sergio Suriano ◽  
Stefano Crippa

2015 ◽  
Vol 10 (9) ◽  
pp. 1485-1504 ◽  
Author(s):  
Vincent Thomas ◽  
James Clark ◽  
Joël Doré

2013 ◽  
Vol 68 (394) ◽  
pp. 40-44 ◽  
Author(s):  
Jakeline Fernandes Cabral ◽  
Marco Antônio Pereira da Silva ◽  
Rafaella Belchior Brasil ◽  
Thiago Soares Carvalho ◽  
Cristiane Isabô Giovannini ◽  
...  

2021 ◽  
Author(s):  
Fumio Nakazawa ◽  
Kumiko Goto-Azuma

<p>The storage of melted snow and/or ice samples from snow pits and ice cores in a refrigerator for long durations may be limited by an increase in particle concentration caused by microbial growth after approximately 1–2 weeks. In this study, we examined an ultraviolet (UV) disinfection method for the storage of melted snow and/or ice samples. Surface snow obtained from Glacier No. 31 in the Suntar-Khayata Range, eastern Siberia, Russia was divided into two portions for UV treatment and untreated controls. Particle concentrations in the samples were measured using a Coulter counter (Multisizer 4e; Beckman Coulter, USA). Whereas the particle concentration in untreated samples increased, no obvious increase was observed over 53 days in the samples subjected to UV treatment. In addition, the original particle concentrations were unaffected by UV treatment. These findings indicate that the antimicrobial effect of UV radiation is effective for long-term sample storage of melted water samples. A detailed analysis of the particle size distribution for untreated samples indicated that particles of 0.7–1.2 µm appeared within the first 7–14 days. Measurements using a viable particle counter (XL-10BT2 and XL-28A1; RION Co. Ltd., Japan) confirmed that these were biological particles, suggesting that microbial growth occurs during this period. Subsequently, the particles shifted to a smaller size and a higher concentration, suggesting that the decomposition of microorganisms occurred in the water samples. Therefore, the size distribution of particles in untreated samples reflected the growth and decomposition of microorganisms over time.</p>


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