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The effect of controlled cooling after hot rolling on the mechanical properties of a commercial high carbon steel wire rod
, Article Materials and Design ; Volume 24, Issue 6 , 2003 , Pages 415-421 ; 02641275 (ISSN) ; Karimi Taheri, A ; Sharif University of Technology
Elsevier Ltd
2003
Abstract
In this research, the effects of different cooling conditions after hot rolling in Stelmor conveyor line on the mechanical properties of a commercial high carbon steel wire rod are investigated. By opening and closing the lids, turning on and off the fans in Stelmor system, an air patenting process is performed on a commercial high carbon steel to improve its mechanical properties and ductility. The wire rods produced in different cooling conditions are investigated by tensile test, metallography and image analyzing. The optimum cooling condition required for high strength and ductility are evaluated. Moreover, the relationships between yield stress, UTS and fracture stress, and...
Trend of laser research developments in global level
, Article Optics and Laser Technology ; Volume 38, Issue 2 , 2006 , Pages 122-131 ; 00303992 (ISSN) ; Mahdieh, M. H ; Sharif University of Technology
2006
Abstract
An up-to-date progress of the international laser research and development is given in this article. The number of scientific publications and filed patents are considered as a figure of merit and based on these numbers the growth pace and important aspects are investigated. We have used the Science Finder Scholar search engine, which indexes more than 4000 journals, in different languages, and represents most significant published materials in laser science and engineering. The growth of the laser and related fields are described in terms of resulting scientific publications for the period of 1990-2003. The share of top nations in scientific publications, and in particular laser...
Carbon nanotube research developments in terms of published papers and patents, synthesis and production
, Article Scientia Iranica ; Volume 19, Issue 6 , December , 2012 , Pages 2012-2022 ; 10263098 (ISSN) ; Sharif University of Technology
2012
Abstract
Progress of carbon nanotube (CNT) research and development in terms of published papers and patents is reported. Developments concerning CNT structures, synthesis, and major parameters, in terms of the published documents are surveyed. Publication growth of CNTs and related fields are analyzed for the period of 2000-2010. From the explored search term, "carbon nanotubes", the total number of papers containing the CNT concept is 52,224, and for patents is 5,746, with a patent/paper ratio of 0.11. For CNT research in the given period, an annual increase of 8.09% for paper and 8.68% for patents are resulted. Published papers for CNT, CVD and CCVD synthesis parameters for the period of 2000-2010...
National laser research progress in context of international developments
, Article Journal of Applied Sciences ; Volume 8, Issue 17 , 2008 , Pages 2958-2966 ; 18125654 (ISSN) ; Sharif University of Technology
2008
Abstract
This study presents an up to date progress of the national and international laser research and developments. The number of scientific publications and accepted patents are considered as a figure of merit and based on these numbers the growth pace for the period of 1990-2003 is investigated. The share of top nations in scientific publications and in particular laser publications in term of their Gross Domestic Product (GDP) is presented. Four countries including the USA, Japan, Germany and China have a laser publication contribution of 58.9% while the rest of the world including (189) countries contribute 41.1%. However, for the case of accepted patents, which are the more important factor,...
Investigating the Effect of Patent Activities on the Centrality Indices of Scientific Collaboration Network of Faculty Members in Selected Iranian Universities
, M.Sc. Thesis Sharif University of Technology ; Mirnezami, Reza (Supervisor)
Abstract
Scientific collaboration and the resulting outputs have been always of interest to the scientific community. Specifically, drawing and understanding the elements of scientific collaboration network and identifying its determinants are important step in prescribing and implementing policies in various fields and disciplines of science. Focusing on the Iran context, this study examines the scientific collaborations of faculty members in selected Iranian universities (Sharif University of Technology, University of Tehran, Iran University of Science and Technology, Amirkabir University of Technology, Isfahan University of Technology, and Ferdowsi University of Mashhad). We have drawn the...
Does knowledge base complexity affect spatial patterns of innovation? An empirical analysis in the upstream petroleum industry
, Article Technological Forecasting and Social Change ; Volume 143 , 2019 , Pages 273-288 ; 00401625 (ISSN) ; Rosiello, A ; Sharif University of Technology
Elsevier Inc
2019
Abstract
Using network analysis, we investigate if an industry's complex and integrated knowledge base leads to a higher spatial concentration (or dispersal)of innovative activities. This is important because the extant literature provides competing claims about how knowledge base complexity impacts on the spatial distribution of industrial innovation. To help empirically resolve this issue, we draw on longitudinal data (1970–2010)on the upstream petroleum industry and build indexes of entropy and complexity to render knowledge base dynamics, assess the spatial concentration of innovation, and study industry structural transformations. We first find a correlation – once a crucial distinction between...
Modeling of Different Geometries of Children's Heart Occluder's by Finite Element Method
, M.Sc. Thesis Sharif University of Technology ; Arghavani, Jamal (Supervisor)
Abstract
Congenital heart defects are a type of heart diseases that some babies get at birth. These diseases generally have symptoms such as shortness of breath, headache, impaired blood supply, hyperplasia of the lungs, enlarged heart, and so on. In the past, open heart surgery was commonly used to treat such diseases, which was a costly and risky procedure. But over time, occluders made it easier. An occluder is referd to a device that is generally minimally invasive in the area of the fault and could block it. The occluders are usually braided type, with inside polyethylene fibers, where tissues can grow and clogs the defect over time. Although occluders have greatly increased the success rate of...
A synergistic program between engineering and business schools towards medical technology commercialization
, Article IEEE TENSYMP 2014 - 2014 IEEE Region 10 Symposium ; 14- 16 April , 2014 , pp. 456-461 ; ISBN: 9781479920280 ; Gan, K. B ; Chellappan, K ; Ali, M. A. M ; Mustafa, M. M ; Sharif University of Technology
Abstract
Governments in developing countries have invested in institutions of higher learning in order to develop homegrown, high technology products. Among these, the National University of Malaysia (Universiti Kebangsaan Malaysia), recognized as a Research University, is actively involved in projects related to medical technology through its various faculties. The net result of these activities is impressing from the point of view of patents and publications, but unfortunately not yet in terms of commercialization. This paper starts by presenting the main obstacles towards the objective of bringing a laboratory prototype to the market in the context of Malaysia. Then, a framework is presented...
High-performance enzyme-free glucose sensor with Co-Cu nanorod arrays on Si substrates
, Article Recent Patents on Biotechnology ; Volume 12, Issue 2 , 2018 , Pages 126-133 ; 18722083 (ISSN) ; Yazdanpanah, A ; Karponis, D ; Aghabarari, B ; Tahmasbi, M ; Seifalian, A ; Mozafari, M ; Sharif University of Technology
Bentham Science Publishers B.V
2018
Abstract
Background: Glucose sensors have been extensively researched in patent studies and manufactured a tool for clinical diabetes diagnosis. Although some kinds of electrochemical enzymatic glucose sensors have been commercially successful, there is still room for improvement, in selectivity and reliability of these sensors. Because of the intrinsic disadvantages of enzymes, such as high fabrication cost and poor stability, non-enzymatic glucose sensors have recently been promoted as next generation diagnostic tool due to their relatively low cost, high stability, prompt response, and accuracy. Objective: In this research, a novel free standing and binder free non-enzymatic electrochemical sensor...
A deflation procedure for subspace decomposition
, Article IEEE Transactions on Signal Processing ; Volume 58, Issue 4 , 2010 , Pages 2363-2374 ; 1053587X (ISSN) ; Jutten, C ; Shamsollahi, M. B ; Sharif University of Technology
2010
Abstract
A general deflation framework is described for the separation of a desired signal subspace of arbitrary dimensions from noisy multichannel observations. The method simultaneously uses single and multichannel priors to split the desired and undesired subspaces, even for coplanar (intersecting) subspaces. By appropriate use of signal priors, it can even extract signals from degenerate mixtures of signals and noise recorded from a few number of channels in low SNR scenarios, without the reduction of the data dimensions. As a case study, the performance of the proposed method is studied for the problem of extracting fetal cardiac signals from maternal abdominal recordings, over simulated and...
Quantification of technological progress in greenhouse gas (GHG) capture and mitigation using patent data
, Article Energy and Environmental Science ; Volume 12, Issue 9 , 2019 , Pages 2789-2805 ; 17545692 (ISSN) ; Triulzi, G ; Magee, C. L ; Sharif University of Technology
Royal Society of Chemistry
2019
Abstract
Greenhouse gas emissions from anthropogenic sources are believed to be the main cause of global warming and climate change. Furthermore, fossil fuels are forecasted to remain the dominant source of energy in the near future. Therefore, capture and sequestration of greenhouse gases and in particular carbon dioxide is likely to be a major pathway toward environmental protection and energy sustainability. Such clarity has stimulated an intense and diverse range of research into various capture and mitigation technologies, which race with global warming in real-time. Quantification of the performance improvement rates of these technologies can inform decision-makers' long-term investment...