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1.
PAPER CURRENT
Normal and dusty days comparison of culturable indoor airborne bacteria in Ahvaz, Iran (2014)
Publication Date: 2014-10-24
Description: Abstract Important sources of chemical and biological indoor pollutants include outdoor air, the human body and human activities, emission from materials, furnishings, appliances and use of commodities. The main purpose of this study was to identify culturable indoor airborne bacteria in normal and dust event days in indoor environments of a school, a hospital and a university in Ahvaz city, which individuals such as children, teenagers, adolescences and old people had activity there. Samples were collected using the biostage sampler, an Andersen-based method, with a flow rate of 28.3 l/min, from July 2010 to March 2011. Temperature and humidity were measured and registered in each time of sampling. The identification of bacteria was performed to genus level by using appropriate methods and standard biochemical tests. Gram-positive bacteria in both normal and dust event days with more than 90 % had the highest concentration and frequency. Predominant bacteria in normal and dust event days were Staphylococcus spp. (72.9, 87.9 %), Streptomyces spp. (60.9, 62.1 %), Bacillus spp. (94, 89 %) and Micrococcus spp. (65.4, 71.2 %), respectively. The highest concentrations of bacteria in normal and dust event days were in winter. The range of bacteria in normal and dust event days were 0–4,800 and 210–10,000 cfu/m3, respectively. There was a significant difference between the concentration of bacteria in normal and dust event days (p = 0.001) and also a significant association was found between the concentration of total bacteria with temperature and humidity (p < 0.05). The concentration of bacteria in dust event days was 1.8 times higher than normal days. Consequently, the concentrations of bacteria in all three sampling sites were higher in dust event days than normal days indicating the impact of dust storms on increased bacterial concentration in indoor environment.
Print ISSN: 0393-5965
Electronic ISSN: 1573-3025
Topics: Biology
Published by Springer
2.
PAPER CURRENT
Influence of air–soil temperature on leaf expansion and LAI of Carpinus betulus trees in a temperate urban forest patch (2014)
Publication Date: 2014-10-24
Description: Publication date: 15 January 2015 Source:Agricultural and Forest Meteorology, Volume 200 Author(s): Melih Öztürk , İlyas Bolat , Ahmet Ergün Air temperature is effective meteorological parameter in overall leaf phenology of deciduous temperate forests. Not only the air temperature but also the soil temperature influences seasonal leaf development of deciduous trees. In order to determine the extent of air and soil temperature impact on the Carpinus betulus leaves, we analyzed two significant parameters; leaf area (LA) and leaf area index (LAI) as an indicator of leaf development. We monitored LA expansion through leaf harvesting with about weekly intervals from early April to late May, and LAI through hemispherical photographing from mid-March and mid-June. After the budburst and leaf unfolding between late March and early April, mean LAI and LA consecutively exhibited increasing patterns until their maximums (2.70 and 28.60cm2) in late May and early May, respectively. Both the LA and LAI trends were in accordance particularly with the soil temperatures of all layers. Namely, the coefficients (r) were at least 0.88 indicating high significance (P <0.01) for all correlations. The correlations between LAI and air temperatures were also significant (P <0.01) i.e. r =0.76, 0.82 and 0.88 for maximum, mean and minimum air temperatures, respectively. However, the correlations between LA and air temperatures were insignificant. Unlike the current year, there were significant correlations of the LA with both the preceding year's mean air temperature (P =0.05) and sunlight duration (P =0.02). Consequently, the results revealed the importance of relatively less referred parameter; soil temperature, primarily for the urban forest trees which are susceptible to anthropogenic climate warming.
Print ISSN: 0168-1923
Electronic ISSN: 1873-2240
Topics: Geography , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Physics
Published by Elsevier
3.
PAPER CURRENT
Evaluation of a self-correcting dual probe heat pulse sensor (2014)
Publication Date: 2014-10-24
Description: Publication date: 15 January 2015 Source:Agricultural and Forest Meteorology, Volume 200 Author(s): Minmin Wen , Gang Liu , Baoguo Li , Bing C. Si , Robert Horton The dual probe heat pulse method (DPHP) can be used to measure soil thermal properties. However, in situ probe spacing is prone to change resulting in large errors of measured soil heat capacity c. A newly designed DPHP sensor has two thermistors in the temperature probe which can be used to calculate in situ changes in probe spacing. This new sensor has been tested under the limited condition of linear coplanar probe deflection. i.e., probes were deflected in-line but were not bent in different directions. However, actual probe deflections may not always be coplanar linear. In this study the applicability of the new DPHP sensor is evaluated in fine sand and in silica sand for a variety of probe deflections. Probes are deflected at the bottom end (bottom) or top end (top) of probes. Results indicate that the new sensor can significantly eliminate errors in c caused by coplanar and non-coplanar probe deflections. Compared with bottom deflections, top deflections have larger errors in c. Thus, theory used to correct for deflections is more applicable to bottom deflections than to top deflections. The errors in c for saturated soil materials are larger than the errors in c for dry soil materials, because of the finite response times of the thermistors used in the probes. Clearly, the newly designed DPHP sensors have the potential for reducing errors caused by various kinds of probe deflections that may be encountered in the field. Graphical abstract
Print ISSN: 0168-1923
Electronic ISSN: 1873-2240
Topics: Geography , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Physics
Published by Elsevier
4.
PAPER CURRENT
Algorithms, Vol. 7, Pages 582-596: Processing KNN Queries in Grid-Based Sensor Networks (2014)
Publication Date: 2014-10-24
Description: Recently, developing efficient processing techniques in spatio-temporal databases has been a much discussed topic. Many applications, such as mobile information systems, traffic control system, and geographical information systems, can benefit from efficient processing of spatio-temporal queries. In this paper, we focus on processing an important type of spatio-temporal queries, the K-nearest neighbor (KNN) queries. Different from the previous research, the locations of objects are located by the sensors which are deployed in a grid-based manner. As the positioning technique used is not the GPS technique, but the sensor network technique, this results in a greater uncertainty regarding object location. With the uncertain location information of objects, we try to develop an efficient algorithm to process the KNN queries. Moreover, we design a probability model to quantify the possibility of each object being the query result. Finally, extensive experiments are conducted to demonstrate the efficiency of the proposed algorithms.
Electronic ISSN: 1999-4893
Topics: Computer Science
Published by MDPI Publishing
5.
PAPER CURRENT
Algorithms, Vol. 7, Pages 554-581: Parallelizing Particle Swarm Optimization in a Functional Programming Environment (2014)
Publication Date: 2014-10-24
Description: Many bioinspired methods are based on using several simple entities which search for a reasonable solution (somehow) independently. This is the case of Particle Swarm Optimization (PSO), where many simple particles search for the optimum solution by using both their local information and the information of the best solution found so far by any of the other particles. Particles are partially independent, and we can take advantage of this fact to parallelize PSO programs. Unfortunately, providing good parallel implementations for each specific PSO program can be tricky and time-consuming for the programmer. In this paper we introduce several parallel functional skeletons which, given a sequential PSO implementation, automatically provide the corresponding parallel implementations of it. We use these skeletons and report some experimental results. We observe that, despite the low effort required by programmers to use these skeletons, empirical results show that skeletons reach reasonable speedups.
Electronic ISSN: 1999-4893
Topics: Computer Science
Published by MDPI Publishing
6.
PAPER CURRENT
Evolution of newspaper coverage of water issues in Australia during 1843–2011 (2014)
Publication Date: 2014-10-24
Description: Abstract News accounts both reflect and influence public opinion through their noted ‘agenda-setting’ capability. We examined newspaper articles in Australia’s The Sydney Morning Herald from 1843 to 2011 to observe the evolution of media coverage on water issues related to water resources management. The results showed that water supply-related articles have dominated the reporting of water issues since 1843. This emphasis is reflected in the institutions involved and their related policy/management initiatives, as well as the themes of the articles. Extreme events such as flooding and drought have punctuated the historical record of reports on water issues. An economic development-driven tone was overwhelmingly predominant in newspaper articles (85 % of the total); however, there has been a marked decline in the importance of development-driven tone relative to environmental-sustainability oriented tone of articles since 1994. People from academia and NGOs were rarely quoted. Inclusion of wider range stakeholders should be considered as a strategic break-through and natural events should be considered as an “opportunity” to change public opinion on water issues for environmental sustainability.
Print ISSN: 0044-7447
Electronic ISSN: 1654-7209
Topics: Energy, Environment Protection, Nuclear Power Engineering
Published by Springer on behalf of The Royal Swedish Academy of Sciences.
7.
PAPER CURRENT
Comparison of different calibration approaches for chloramphenicol quantification in chicken muscle by ultra-high pressure liquid chromatography tandem mass spectrometry (2014)
Publication Date: 2014-10-24
Description: Analyst, 2014, Accepted ManuscriptDOI: 10.1039/C4AN01560F, PaperXiao-Dong Pan, Wei Jiang, Ping-Gu WuMatrix-dependent signal suppression often occurs in quantitative analysis by ultra-high pressure liquid chromatography tandem mass spectrometry (UPLC-MS/MS). In this study, we investigated three calibration methods for compensation of signal suppression...The content of this RSS Feed (c) The Royal Society of Chemistry
Print ISSN: 0003-2654
Electronic ISSN: 1364-5528
Topics: Chemistry and Pharmacology
8.
PAPER CURRENT
Printing silicone-based hydrophobic barriers on paper for microfluidic assays using low-cost ink jet printers (2014)
Publication Date: 2014-10-24
Description: Analyst, 2014, Accepted ManuscriptDOI: 10.1039/C4AN01626B, CommunicationVinodh Rajendra, Clemence Sicard, J D Brennan, Michael A. BrookPaper-based microfluidic devices exhibit many advantages for biological assays. Normally, the assays are restricted to certain areas of the paper by hydrophobic barriers comprised of wax or alkyl ketene dimers...The content of this RSS Feed (c) The Royal Society of Chemistry
Print ISSN: 0003-2654
Electronic ISSN: 1364-5528
Topics: Chemistry and Pharmacology
9.
PAPER CURRENT
Publication Date: 2014-10-24
Description: ACS Sustainable Chemistry & EngineeringDOI: 10.1021/sc500440q
Electronic ISSN: 2168-0485
Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
10.
PAPER CURRENT
Dual-Functional Probes for Sequential Thiols and Redox Homeostasis Sensing in Live cells (2014)
Publication Date: 2014-10-24
Description: Analyst, 2014, Accepted ManuscriptDOI: 10.1039/C4AN01441C, PaperZhiyuan Tian, Tao Ma, Hui Ding, Haijiao Xu, Yanlin Lv, Heng Liu, Hongda WangA new type of resorufin-based dual-functional fluorescent probe whose fluorescence emission features are sensitive to thiol compounds and redox homeostasis was developed. Thiols-triggered nucleophilic substitution of the probes transfers the...The content of this RSS Feed (c) The Royal Society of Chemistry
Print ISSN: 0003-2654
Electronic ISSN: 1364-5528
Topics: Chemistry and Pharmacology