| 1. |
|
|
| 2. |
- Biro, Thomas, et al.
(författare)
-
Substrate Integrated Waveguide
- 2008
-
Ingår i: Proceedings of RVK08/MMWP08, Växjö June 9-13, 2008. - : Växjö universitet. ; , s. 284-286
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- A substrate integrated waveguide, SIW, is a waveguide that is integrated directly on a subtrate. These structeres has recently been developed for different applications. The simplest SIW design is a rectangular waveguide in a subtrate formed by metallization of the upper and lower surfaces of the substrate and by placing vertical metal vias periodically along two parallel lines. Different types of SIW are analyzed and simulated in this contribution. In particular wave propagation along an SIW is analyzed.
|
|
| 3. |
- Guilford, Tim, et al.
(författare)
-
GPS tracking of the foraging movements of Manx Shearwaters Puffinus puffinus breeding on Skomer Island, Wales
- 2008
-
Ingår i: Ibis. - 1474-919X. ; 150, s. 462-473
-
Tidskriftsartikel (refereegranskat)abstract
- We report the first successful use of miniature Global Positioning System loggers to track the ocean-going behaviour of a c. 400g seabird, the Manx Shearwater Puffinus puffinus. During three field seasons, breeding birds were tracked during the incubation and chick rearing periods on their foraging excursions from the large colony on Skomer Island, Pembrokeshire, UK. Foraging effort was concentrated in the Irish Sea. Likely foraging areas were identified to the north off the Mull of Galloway (some 330km from Skomer), in Dundalk Bay, Cardigan Bay, and more diffusely to the west of the colony both locally and off southern Ireland. No foraging excursions were recorded significantly to the south of the colony, conflicting with the conclusions of earlier studies based on ringing recoveries and off-shore observations. We discuss several explanations including the hypothesis that foraging may have shifted substantially northwards in recent decades (although the possibility that breeding birds forage further south in the very early part of the season remains open). We found no obvious relationship between birds’ positions and water depth, although night-time observations were more likely to be in shallower water than day-time observations. We also found that despite the fact that shearwaters can be observed rafting off-shore from their colonies in the hours prior to making landfall at night, breeding birds are usually located much further from the colony in the last eight hours before arrival, a finding that has significance for the likely effectiveness of marine protection areas if they are only local to the colony. Short sequences of precise second-by-second fixes gathered every two hours enabled us to measure movement speed and direction. Movement speeds were bimodal, corresponding to sitting on the water and flying, with flight behaviour separable into erratic (perhaps indicative of searching for food) and directional (perhaps indicative of travelling). Movement behaviour had a diurnal pattern, with flight predominating in the morning and evening, with more sitting at night and around midday. We also provide a first direct measurement of mean flight speed during directional flight (approximately 40 kmh-1), slower than a shearwater’s predicted Vmr (maximum range velocity) and suggesting that birds are exploiting wave or dynamic soaring during long-distance travel.
|
|
| 4. |
- Lundbäck, Jonas, et al.
(författare)
-
A Digital Directional Coupler with Applications to Partial Discharge Measurements
- 2008
-
Ingår i: IEEE Transactions on Instrumentation and Measurements. - 0018-9456. ; 57:11, s. 2561-2567
-
Tidskriftsartikel (refereegranskat)abstract
- This paper presents a digital directional coupler (DDC) that separates forward- and backward-traveling waves on a transmission line. Based on two independent wideband measurements of voltage and current and on frequency-domain digital wave splitting using a fast Fourier transform (FFT), the DDC is a versatile device for direction separation. A practical procedure is described for the calibration of the digital processor with respect to the particular transmission line and the voltage and current sensors that are being used. As an experiment, a DDC was designed and implemented using low-cost wideband sensors and was installed with medium-voltage equipment in a power distribution station. Partial discharge (PD) measurements were conducted on cross-linked polyethylene (XLPE)-insulated power cables to illustrate the directional separation capabilities of the DDC.
|
|
| 5. |
|
|
| 6. |
- Ola, Thomas O, et al.
(författare)
-
Importin beta : A novel autoantigen in human autoimmunity identified by screening random peptide libraries on phage
- 2006
-
Ingår i: Journal of Autoimmunity. - : Elsevier BV. - 0896-8411 .- 1095-9157. ; 26:3, s. 197-207
-
Tidskriftsartikel (refereegranskat)abstract
- By screening random peptide libraries (RPLs) with sera of Type 1 diabetes (T1D) patients, we previously identified 5 disease-specific 'mimotopes' displayed on phages (phagotopes). We already characterised 1 phagotope (CH1p), as an epitope of human osteopontin, an autoantigen expressed within the somatostatin cells of human islets. In this paper, we report the characterization of the second phagotope, 195Dyn, by immunohistochemistry, Western Blotting and screening of a human islet cDNA library using rabbit anti-195Dyn antibodies. The 195Dyn mimotope was detected in human islets. The screening of a λgt11 cDNA library from human islets has identified a clone, which corresponded to human importin beta. ELISA detected autoantibodies against this protein in sera of around 60% of TD1 patients and in 30% of patients affected by other autoimmune diseases. In summary, RPLs technology proved again successful in identifying another novel autoantigen (importin beta), whose significance in the autoimmune process remains to be fully elucidated. © 2006 Elsevier Ltd. All rights reserved.
|
|
