47,758 research outputs found
Delamination evaluation of composite laminates with different interface fiber orientations using acoustic emission features and micro visualization
No full textThis study aims to investigate the sequence of initiation and evolution of different damage mechanisms during the DCB standard test procedure on specimens with different interface fiber orientation using Acoustic Emission (AE) data analysis and microscopic imaging methods. For this purpose, a series of experiments based on standard ASTM D5528 were performed on 24 layer glass epoxy multidirectional specimens with ±θ/05 As As layup, in which θ is 0. 30. 45 and 60. The acoustic data were then acquired with two AE sensors and the whole test procedure was observed by two digital cameras, which were focused on specimen edges. The results show that the initiation and evolution process of matrix cracking as the first activated damage mechanism greatly depends on the interface fiber orientation. Also, load-displacement curves and AE data can be well correlated with microscopic observation in all stages of damage initiation, evolution and propagation. Although the standard nonlinear point as crack initiation onset predict an equal fracture energy for all cases, however AE analyses and microscopic observations show early damage initiation and evolution in 45 and 60-degree interfaces
IS200 fingerprinting of Salmonella enterica serotype Abortusovis strains isolated in Iran
No full textSalmonella enterica serovar Abortusovis is one of the most common pathogens responsible for abortion in sheep. In Iran, the spread of Abortusovis is highly dependent on the nomadic life style. In this study we performed IS200 fingerprinting to identify the clonal lines circulating in Iran. All the isolates contained 4 or 5 copies of the transposon and could be classified in 4 genotypes. A single genotype was highly prevalent and very likely it has circulated in Iran since 1970. All the isolates showed a high degree of relatedness
Techno-economical Analysis of Rooftop Grid-connected PV Dairy Farms; Case Study of Urmia University Dairy Farm
No full textThe global trends indicate a growing commitment to renewable energy development because of declining fossil fuels and environmental threats. Moreover, the global demographic growth coupled with rising demands for food has escalated the rate of energy consumption in food section. This study aims to investigate the techno-economic impacts of a grid-connected rooftop PV plan applied for a educational dairy farm in Urmia university, with total estimated annual electrical energy consumption of 18,283 kWh, located at the north west part of Iran. Based on the current feed-in tariff and tremendously low electricity price in agriculture section in Iran, the plants with size ranged from 14.4 to 19.7 kWp (initial investment ranged from 26,000 to 36,000 USD) would be satisfied economically
Process Engineering for Low-Temperature Carbon-Based Perovskite Solar Modules
No full text<p>In less than a decade, Perovskite solar cell (PSC) technology has gained high efficiency and broad attention because of its key enabling physical and morphological features. One of the main obstacles to PSC industrialization and commercialization is managed with the demonstration of stable devices by adopting low-cost, reliable materials and fabrication process methods. Here, we report a Perovskite solar module based on a low-temperature carbon electrode. The full process was performed in ambient air and engineered by printing techniques.</p>
A pragmatic methodology to estimate hourly energy demand profile of a case studied dairy farm; primary step toward PV application
No full textOn-farm detailed electric load profile is becoming increasingly important in the context of renewable energy source implementation in livestock housing due to rising energy costs along with concerns over greenhouse gas emissions. This study aimed to propose and investigate a pragmatic methodology to determine detailed energy demand profile in dairy farm sizes of 20 to 100 cows as the most common size in Iran. A model was developed based on the case studied dairy farm conditions, including artificial lighting, milking, milk cooling and water pumping subsections. This research prepares the first step toward employing photovoltaic electricity in dairy farms and thereby encouraging sustainable dairy farming
Enhanced carbon-based back contact electrodes for perovskite solar cells: effect of carbon paste composition on performance and stability
No full textThe Role of Green Finance in Supporting Maritime Sustainable Development
No full textThis chapter introduces an observation of the achievement of a green economy that requires a stable and growing financial system. In this regard, the announcement of the European Green Deal, at the end of 2019, testified to the commitment to strengthening one of the crucial factors for achieving an increasingly sustainable economy, i.e., the financial instrument represented by Green Bonds. For this reason, this study focuses on Green Bonds which, within the European Union, from the very early stages of drafting the post-Covid-19 Recovery Plan, have been attributed a crucial role in achieving the objectives of the ecological transition. To strengthen the green bond market, it is necessary to mobilize the resources of investors on environmental issues. The underlying logic that contributed to the birth of these new financial instruments, and differentiates them from traditional bonds, is the need to finance investment projects capable of minimizing the negative effects produced by business operations
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
Mesophilic-hydrothermal-thermophilic (M-H-T) digestion of green corn straw
No full textMesophilic-hydrothermal (80-160 degrees C, 30 min)-thermophilic (M-H-T) digestion and control tests of mesophilic (M), thermophilic (T), hydrothermal-mesophilic (H-M), and mesophilic-thermophilic digestion (M-T) of green corn straw were conducted for a 20-day fermentation period. The results indicate that M-H-T is an efficient method to improve methane production. A maximum methane yield of 371.74 mL/g volatile solid was obtained by the M (3 days)-H (140 degrees C)-T (17 days) process, which was 20.44%, 16.55%, 31.44%, and 14.31% higher than the yields of the M, T, 140-M, and M-T processes. The enhanced methane production was attributed to (1) the improved hemicellulose degradation and lignin disorganization; (2) prevention of the degradation of soluble sugar, easily hydrolyzed hemicellulose and cellulose into furfural and methylfurfural; and (3) lack of formation of Maillard reaction products during initial hydrothermal treatment. (C) 2015 Elsevier Ltd. All rights reserved
Contribution of Information and Communication Technology (ICT) in Country’S H-Index
No full textThe aim of this study is to examine the effect of Information and Communication Technology (ICT) development on country’s scientific ranking as measured by H-index. Moreover, this study applies ICT development sub-indices including ICT Use, ICT Access and ICT skill to find the distinct effect of these sub-indices on country’s H-index. To this purpose, required data for the panel of 14 Middle East countries over the period 1995 to 2009 is collected. Findings of the current study show that ICT development increases the H-index of the sample countries. The results also indicate that ICT Use and ICT Skill sub-indices positively contribute to higher H-index but the effect of ICT access on country’s H-index is not clear.Cite as:
FARHADI, M., SALEHI, H., EMBI, M. A., FOOLADI, M., FARHADI, H., AGHAEI CHADEGANI, A., & ALE EBRAHIM, N. (2013). Contribution of Information and Communication Technology (ICT) in Country’S H-Index. Journal of Theoretical and Applied Information Technology, 57(1), 122-127
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