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| 2. |
- Nilsson, Emil, et al.
(författare)
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A low power-long range active RFID-system consisting of active RFID backscatter transponders
- 2010
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Ingår i: 2010 IEEE International Conference on RFID-Technology and Applications (RFID-TA). - Piscataway, N.J. : IEEE Press. - 9781424466986 ; , s. 26-30, s. 26-30
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Konferensbidrag (refereegranskat)abstract
- In this paper we present a novel active radio frequency identification system consisting of transponders with low complexity, low power consumption, and long system reading range. The transponder’s low complexity and small circuit integration area indicate that the production cost is comparable to the one of a passive tag. The hardware keystone is the transponder’s radio wake-up transceiver, which is a single oscillator with very low power consumption. The communication protocol, based on frequency signalling binary tree, contributes to the low complexity of the tag architecture. More than 1500 tags can be read per second. The average transponder ID read-out delay is 319 ms when there are 1000 transponders within reach of the interrogator. The calculated expected life time for a transponder is estimated to be almost three years.
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| 3. |
- Nilsson, Emil, et al.
(författare)
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A Pharmaceutical Anti-counterfeiting Method Using Time Controlled Numeric Tokens
- 2011
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Ingår i: 2011 IEEE International Conference on RFID-Technologies and Applications. - Piscataway, NJ : IEEE Press. - 9781457700286 ; , s. 335-339
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Konferensbidrag (refereegranskat)abstract
- An anti-counterfeit and authentication method usingtime controlled numeric tokens enabling a secure logistic chain ispresented. Implementation of the method is illustrated with apharmaceutical anti-counterfeit system. The method uses activeRFID technology in combination with product seal. Authenticityis verified by comparing time controlled ID-codes, i.e. numerictokens, stored in RFID tags and by identical numeric tokensstored in a secure database. The pharmaceutical products areprotected from the supplier to the pharmacist, with thepossibility to extend the authentication out to the end customer.The ability of the method is analyzed by discussion of severalpossible scenarios. It is shown that an accuracy of 99.9% tellingthe customer she has an authentic product is achieved by the useof 11-bit ID-code strings.
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| 5. |
- Nilsson, Martin, et al.
(författare)
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A Cluster Approach to Spatio-Temporal Channel Estimation
- 2000
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Ingår i: <em>IEEE International Conference on Acoustics, Speech, and Signal Processing</em>. - : IEEE. ; , s. 2757-2760
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Konferensbidrag (refereegranskat)abstract
- In a severe multipath environment the antenna receives multiple copies of the same transmitted signal. To solve for all waves is difficult if possible at all. In this paper we use the approach of grouping the spatio-temporalreflections into clusters. We study how the aperture and bandwidth affects the cluster resolution using experimental data. The measurements were obtained by transmitting linear FM (chirp) signals of 150 MHz bandwidth, in the 1800 MHz band. An antenna array of 16 elements was used as a receiver.
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| 6. |
- Nilsson, Susanna, et al.
(författare)
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A co-located collaborative Augmented Reality application
- 2009
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Ingår i: VRCAI 2009. - New York : ACM. - 9781605589121 ; , s. 179-184
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Konferensbidrag (refereegranskat)abstract
- This paper presents results from a study on using an AR application to support collaborative command and control activities requiring the collaboration of three different civil service organisations. The technology is used to create a common ground between the organisations and allows the users to interact, plan resources and react to the ongoing events on a digital map. The AR application was developed and evaluated in a study where a forest fire scenario was simulated. Participants from the involved organisations acted as command and control teams in the simulated scenario and both quantitative and qualitative results were obtained. The results show that AR can become a useful tool in these situations in the future.
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| 10. |
- Alcorta, M., et al.
(författare)
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Nuclear Structure of C-12 from Break-up Studies in Complete Kinematics
- 2009
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Ingår i: AIP Conference Proceedings. - : AIP. - 1551-7616 .- 0094-243X. - 9780735407022 ; 1165, s. 27-30 461
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Konferensbidrag (refereegranskat)abstract
- A complete kinematics study of the B-10(He-3,p alpha alpha alpha) and B-11(He-3,d alpha alpha alpha) reactions has been performed to study the multi-particle break-up of C-12 resonances above the triple-alpha threshold. Four-particle coincidence detection gives us complete information on the direction and energy of the individual alpha particles from the decay of C-12, allowing us to extract new information on the structure of C-12 which we shall present in this contribution. We have observed gamma de-excitation of the T=1 15.11 MeV resonance using charged particle detectors, and have constructed Dalitz plots of the individual resonances in C-12 using the complete kinematics information of the alpha particles which come from their break-up.
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