| 1. |
- Albinsson, John, et al.
(författare)
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Combined use of Iteration, Quadratic Interpolation and an Extra Kernel for high-resolution 2D particle tracking : a first evaluation
- 2010
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Ingår i: 2010 ieee international ultrasonics symposium. - New York : IEEE Press. - 9781457703829 ; , s. 2000-2003
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Konferensbidrag (refereegranskat)abstract
- A novel 2D particle tracking method, that uses 1) iteration, 2) fast quadratic sub-pixel estimation (with only 28 multiplications per movement), and 3) a previous kernel, has been evaluated and compared with a full-search block-matching method. The comparison with high-frequency ultrasound data (40 MHz) was conducted in silico and on phantoms, which comprised lateral, diagonal, and ellipsoidal movement patterns with speeds of 0–15 mm/s. The mean tracking error was reduced by 68% in silico and 71% for the phantom measurements. When only sub-pixel estimation was used, the decrease in the tracking error was 61% in silico and 57% for the phantom measurements. As well as decreasing the tracking error, the new method only used 70% of the computational time needed by the full-search block-matching method. With a fast method having good tracking ability for high-frequency ultrasound data, we now have a tool to better investigate tissue movements and its dynamic functionality.
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| 2. |
- Cronquist, Björn, et al.
(författare)
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The CILO method : firm-supportive research approach enhancing enterprise performance
- 2010
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Ingår i: Knowledge Management and Innovation. - : International Business Information Management Association (IBIMA). ; , s. 1239-1251, s. 1239-1251
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Konferensbidrag (refereegranskat)abstract
- This paper describes a case of collaboration between academia and business firms in supporting innovation processes based on the CILO method, named after the CILO project (communication in learning organizations). The CILO method is an example of firm-supportive research approach. We describe the outcomes related to enhancing enterprise performance from applying the CILO-method in relation to one of the partner companies. The aim of the paper is to describe and discuss the concept of firm-supportive research in relation to the concept of innovation and to demonstrate how the specific characteristics of this research approach can enhance enterprise performance in one of our partner companies, Flower Systems Ltd.
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| 3. |
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| 4. |
- Larsson, Tony, et al.
(författare)
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Dependable Automotive Systems based on Model Certified Components
- 2011
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Konferensbidrag (refereegranskat)abstract
- Advances in Intelligent Transport Systems (ITS), intelligent vehicles and cooperative systems are enabling traffic and transport solutions that are both safer and more environmentally acceptable. While it is well known that high dependability is a desirable feature it has a price, and the level of dependability needed varies from application to application. Typical examples are cooperative safety applications, in particular traffic situation aware vehicle driver warning and assisting systems, enabled by vehicle-to-vehicle and vehicle-to-infrastructure wireless communication in combination with the use of geographical map information, Differential Global Positioning System (DGPS) and vehicle-carried sensors. This kind of applications depend on the reception of satellite data (combined with on-board sensor data from, e.g. odometer and accelerometer) for positioning of the own vehicle and on periodic broadcasting of this information to all neighbors in range. Both the wireless communication with satellites and the one between vehicles can have severe difficulties, for example due to hills or high buildings directly hindering both kinds of radio transmission. There are techniques to make the solutions more robust, e.g. by information fusion for temporary or local communication outage compensation. However, further development is needed and since coverage problems can be made known in advance and related to geographical areas, such information can also be explored.
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| 5. |
- Nilsson, Peter, et al.
(författare)
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Ultra Low Power Hardware for Computing Squared Euclidean Distances
- 2011
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Ingår i: 2011 20th European Conference on Circuit Theory and Design (ECCTD). - Piscataway, NJ : IEEE Press. - 9781457706172 - 9781457706165 ; , s. 580-583
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Konferensbidrag (refereegranskat)abstract
- Computing Euclidean Distances is a very important operation in digital communication, especially in the case of trellis coded modulation, where it is used numerously. This paper shows that a substantial reduction in complexity can be achieved in hardware processing elements for computing Euclidean Distances. A reduction in complexity down to 39% is shown compared to traditional designs. The paper also shows that the optimized design can be done completely ripple free, which leads to a reduction of the critical path to far more than half. The reduction in complexity leads to a reduction in power consumption. The ripple free design also leads to lower power consumption for two reasons: the rippling in itself leads to unnecessary glitches, which costs power and the shorter critical path enables a lower supply voltage, which reduces the power consumption as well. © 2011 IEEE.
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| 6. |
- Olander, Stefan, et al.
(författare)
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Productivity comparisons, are they possible or even desirable?
- 2010
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Ingår i: [Host publication title missing]. - Salford : University of Salford. ; , s. 58-67
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Konferensbidrag (refereegranskat)abstract
- Increased productivity is of societal good and efforts to achieve this should be a relevant task for all businesses. However, the concept of productivity is not clear as to what is to be measured. This becomes a problem especially when statements are made that the development of productivity in the construction industry is not as good as other sectors of industry. It is not clear if this comparison is relevant or even possible to make. This study aims to address and discuss the problem surrounding productivity measurements and comparison of them and is based on literature reviews that address the problem of evaluating productivity, with special focus on construction productivity. The results show that there is no uniform measure for construction productivity that can be used. Different situation calls for different measures. There unique circumstances for various construction activities, such as housing, commercial, industrial, infrastructure etc, that makes comparison of productivity between them virtually impossible. If statements of productivity are made without the knowledge of what the measures really show or is based on, there is a risk that these lead to misleading conclusions. Every study of productivity needs to be critically scrutinised with a high degree of scepticism. Instead of trying to achieve one uniform measure of productivity a set of key performance indicators can be used instead in order to obtain more qualitative facts about the state of the construction industry.
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| 7. |
- Pouyan, Peyman, et al.
(författare)
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A VLSI Implementation of Logarithmic and Exponential Functions Using a Novel Parabolic Synthesis Methodology Compared to the CORDIC Algorithm
- 2011
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Ingår i: 2011 20th European Conference on Circuit Theory and Design (ECCTD). - New York : Institute of Electrical and Electronics Engineers (IEEE). - 9781457706189
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Konferensbidrag (refereegranskat)abstract
- High performance implementations of unary functions are important in many applications e.g. in the wireless communication area. This paper shows the development and VLSI implementation of unary functions like the logarithmic and exponential function, by using anovel approximation methodology based on parabolic synthesis, which is compared to the well known CORDIC algorithm. Both designs are synthesized and implemented on an FPGA and as an ASIC. The results of such implementations are compared with metrics such as performance and area. The performance in the parabolic architecture is shown to exceed the CORDIC architecture by a factor 4.2, in a 65 nm Standard-VT ASIC implementation. © 2011 IEEE.
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| 8. |
- Sjöberg, Katrin, et al.
(författare)
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Measuring and using the RSSI of IEEE 802.11p
- 2010
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Ingår i: 17th World Congress on Intelligent Transport Systems, ITS 2010, Busan, South Korea, 25-29 October 2010.
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Konferensbidrag (refereegranskat)abstract
- The scalability of intelligent transport systems (ITS) applications is difficult to test in a field operational test (FOT) due to the high number of ITS equipped vehicles required. Therefore, computer simulations for evaluating different wireless communication technologies for ITS different applications can serve as a complement. In this paper we present results from lab measurements conducted on the CVIS hardware platform equipped with the upcoming standard IEEE 802.11p. We have measured the packet error rate versus the signal-to-noise ratio (SNR) for different packet lengths. This lab measurement is the first step towards an outdoor measurement campaign which also considers interference. The outdoor measurements will then be fed into a computer simulator together with a realistic channel model for evaluating the scalability of VANETs in a highway scenario.
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| 9. |
- Suyatin, Dmitry, et al.
(författare)
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Nano-Schottky contacts realized by bottom-up technique
- 2010
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Ingår i: INEC 2010 - 2010 3rd International Nanoelectronics Conference, Proceedings. - Piscataway, N.J. : IEEE Press. - 9781424435432 ; , s. 252-253
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Konferensbidrag (refereegranskat)abstract
- Properties of nanostructures realized by bottom-up techniques are often different from their bulk counterparts. Here we present a study of a nano-Schottky contact formed at the interface between a gold catalytic particle and an epitaxially grown GaxIn1-xAs/InAs nanowire. Selective electrical connections formed to the catalytic particle on one side and to the InAs segment on the other side allowed electrical and optical characterization of the formed junction. We demonstrate that the heterostructure region adjacent to the catalytic particle may act as an ultra-small volume unipolar photodetector with potentially ultra-fast response.
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| 10. |
- Widén, Kristian, et al.
(författare)
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Effects of a Lack of Support for Public Private Partnerships : the Swedish Case.
- 2010
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Ingår i: [Host publication title missing]. - Loughborough : Loughborough University. - 9781897911358 ; , s. 668-676
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Konferensbidrag (refereegranskat)abstract
- Sweden is part of a small European minority in the perceived societal gain of PPP. After a pilot PPP project in late 1990’s no additional project has been started in Sweden. Although there is interest from both public infrastructure clients and construction companies the national government has very clearly stated that infrastructure projects should be procured in a traditional way where all funding should come from the national budget. The purpose of this paper is to discuss how a lack of support for governmental interests in PPP solutions affect the innovative climate of infrastructure investments. Broadly defined, PPP solutions are arrangements where the public sector together with a private partner engages in a long-term co-operation to solve a public need. The opponents in Sweden base their arguments on the viewpoint that it if the state cannot finance a well needed infrastructure project within the national budget there is no need for a private initiative since the state can borrow funds on better terms than a private actor. However, the proponents see PPP as way of not only financing well needed project but also as a way of improving the innovative climate of the infrastructure sector. In short, the opponents only see PPP as an alternative way of financing public projects while the proponents see PPP as a opportunity to improve performance of infrastructure facilities by long-term partnerships and incentives to adopt new and innovative solutions in construction and maintenance. The study presented here shows that the main effects of a lack of PPP solutions is the following: First, the time from an identified need until finished project becomes very long since each project needs to fit in the yearly national budget. Secondly, when national funds are insufficient, well needed infrastructure projects are delayed in the planning process often with no definite new time plan, and very rarely does the government borrow additional funds. Thirdly, there is a tendency to divide large infrastructure facilities in smaller entities in order to fit them in the national budget, which has the effect that the full benefits of the investment are delayed. Finally, and maybe most importantly, the Swedish government’s reluctance to adopt PPP solutions and to finance infrastructure projects in small entities, promotes traditional design and build contracts with very small incentives for adopting new innovative solutions to improve the construction process.
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