- Craig Scott added an answer:How to determine the negative refractive Index of metamaterials?
Dear all, how I can determine the negative refractive index of the metamaterials by CST studio suite or by using S-Parameters?
And a related question - is it possible to tell if a material is a NIM based on its dispersion relation, since that's what many 3D codes compute... something like negative slope for example.
I found out the answer - if the slope of the band diagram is negative near the origin (i.e., about the Gamma point, along the Gamma-K or Gamma-M lines), then the index is negative for that band and is related to the (negative) slope of the dispersion curve, dw/dk.Following
- Ahmad Reeves added an answer:What expectations do university students bring to the experience of using virtual worlds such as Second Life for educational purposes?Given the high end user experience in gaming, and the expectations created by multiplayer environments with sophisticated graphics and interactivity - what value do virtual worlds such as Kaneva, Second Life and others have for research and teaching at university level?
Minocha, S and Reeves, A.J. (2010).Designing for Learner Engagement: Relating pedagogical and learning-space designs in 3D virtual environments In Journal of Learning, Media & Technology Special Issue: Learning and Researching in Virtual Worlds, Volume 35 Issue 2, pp.111-137.Following
- Ján Kozempel added an answer:What is the best method for CNT acid functionalization??
Now, I'm doing the SWCNT functionalization. I refluxed (90% purity)SWCNT with 3:1 volume ratio of H2SO4:HNO3 at 70 degree celcius for 6 hours. After that, I wash the acids using vacuum filtration (0.22um pore size PTFE) for several times..Lastly, I centrifuged the solution(CNT in DI water) with 8000rpm and take out supernatant for characterization. However, when I characterized the solution using SEM and AFM no tubes appeared. And only nanorod that I can get. Before this, I also refluxed with 90 degree celcius instead of 70 because some researchers said the high temperature will cause CNT to be destroyed. Unfortunately, I obtained the same results.Could anyone suggest the best method functionalization in order to get pure CNT-COOH??Thanks for your help :)
In case of SWCNTs I would suggest some acylation reactions instead of oxidation (you may get CO2 easily)Following
- Marie Florence Desir Pierre added an answer:Is Big Bang Disruption really true?How can technology just be a fad?
Technology can be a fad endless mountain enabling progress in almost all sectors. It has become a remedy for all ills in the sectors of activities.Following
- Srinivas Sridhar added an answer:Where could I find examples of nanotechnology and personalized medicine?I am looking for publications or ongoing projects involved with the development of personalized medicine enabled by nanotechnology. In particular I am interested in applications that can be expected to Reach the market within 5-10 years.Hello we have several formulations and projects that we intend to translate and commercialize. See http://sagar.physics.neu.eduFollowing
- Pierre Prado added an answer:What is your forecast about the next life changing scientific breakthrough?What are your insights?Dear Demeritt,
very interesting, thanks a lot.Following
- Feng Shi asked a question:Is there any linear equivalent circuit model for spintronics devices?I need this model to simplify my circuit design.Following
- Theodora Issa added an answer:Hype cycles - do they exist, can researchers gather anything from them?Gartner Group has published hype cycle charts (e.g. for emerging technologies), which seem to indicate the maturity of new or novel ideas, concepts and products in academic and technological communities.
What is the reality behind those charts? Are they useful in forecasting the lifecycle of technologies? Do researchers render them useful to define projects, get funding and write articles?
http://na1.www.gartner.com/imagesrv/newsroom/images/hype-cycle-pr.png;pv4a3db6f9c029a4dbThank Gyorgy, being careful might need them to have other opinions!Following
- Usman Zafar Paracha asked a question:How we can know the emerging science concepts or terms in different fields for research?As a researcher, and science blogger, working on emerging science concepts is worthy but don't know any authentic source for this. Previously, Thomson Reuters presented this information.Following
- Mehryar Nooriafshar added an answer:I am investigating the practical applications of Google Glass in education. I would be interested in sharing ideas with fellow researchers on this topic.Google is about to introduce “Google Glass”. This device is described as a wearable computer which, in a hands-free manner, allows the wearer to access the Internet and utilize the incorporated 720p camera. The camera, a prominent feature, can capture both still shots and video clips for storage or sharing purposes. The most important feature of Google Glass (The Glass) is that the user has the option of providing the commands without, practically, lifting a finger. In other words, the interface with this wearable computer is more natural and human-like. This feature can be referred to as bringing the technology closer to human senses.Andreas, thank you for your message. That sounds really interesting. I am very excited about this emerging technology. I have identified a few suitable applications in education. They include learning languages, mathematics and undertaking research in higher degrees. I plan to put the Glass to the test using these topics.Following
- Wolf Tombe asked a question:I'm leading an R&D effort tasked with predicting where data storage as an industry and technology is going over the next 5 to 7 years.The purpose of this research is to pre-position our agency to be able to take full advantage of the next generation of storage (whatever that is) . The goal is to save tax payer dollars by correctly predicting where storage as a technology and industry is going; thereby reducing the possibilities of purchasing technology (in a couple of years) that doesn't not have strong longevity or will not continue to meet our organizational goals as it evolves over the next 5 to 7 years. Cloud and the potential migration of storage vendors toward adoption of open standards for integration of their storage devices from a single ubiquitous configuration, management and visibility perspective as potential themes being explored. Any and all input, thoughts or theories are greatly appreciated.Following
- Ewald Strasser asked a question:IURO StudyDear colleagues,
The HCI & Usability Unit of the ICT&S Center (University of Salzburg) is conducting a study as part of the EU FP7 funded project - Interactive Urban Robot (IURO) - in which we investigate HRI in public space. We would like to cordially invite you to participate in our online survey. In the survey you will be asked to answer questions about the robot or to rate displayed videos. In particular we are interested in User Experience and Acceptance of robots in public space. No prior knowledge is necessary to participate.
Participation is completely voluntary. The collected data is anonymous and will be kept confidential. The results will be used in aggregated form as part of researcher’s thesis and in future publications.
The survey can be done completely online. However, it requires Flash enabled in your browser in order to watch the videos. Whole study takes approximately 20 minutes. Please read the questions carefully and answer them according to your first thoughts.
Your participation in this study will make an important contribution to the future course of the IURO project.
You can find the detailed instructions and the survey here:
We would like to warmly thank you in advance for helping us with your invaluable participation. For further information please contact:
Jakub Zlotowski, Phone: +43 662 8044 4836, E-Mail: firstname.lastname@example.org
- Shahbaz Ahmed asked a question:Technology and RelegionTechnology is proving relegions day by day. and the most popoular among technology is Islam.
the contents of the holy book "Quran" followed by muslims in Islam relegion are perfect with reference to technological and Social and Philosophical realities.
Every relegion is true but misconceptions by humans is the main barrier to find out their realities. the laws of science and society in Quraan are perfect and technology is opening the secrets of this revealed knowlege.Following
About Emerging Technologies
Connect the people in various disciplines about the future of science and society interaction.