| 1. |
|
|
| 2. |
- Agelis, Sacki
(author)
-
Reconfigurable Optical Interconnection Networks for High-Performance Embedded
- 2005
-
Licentiate thesis (other academic/artistic)abstract
- In embedded computer and communication system the capacity demand for interconnection networks is increasing continuously in order to achieve high-performance systems. Recent breakthroughs show that by using reconfigurability inside a single chip substantial performance gains can be added. However, in this thesis the focus is on system level reconfigurability (between chips or modules) and the performance gains that potentially can be achieved by having support for runtime reconfigurability on the system level.This thesis addresses the field of runtime system level reconfigurability with the use of optics in switches and routers for data- and telecommunications, and in multi-processor systems used for embedded signal processing. Several reconfigurable systems for switching and routing with support to adapt for asymmetric traffic patterns are proposed and compared to identify how design choices affect flexibility, performance etc. The proposed solutions are characterized by their multistage optical interconnection networks with reconfigurable shuffle patterns, where the reconfigurability is provided by micro-optical-electrical mechanical systems. More specifically, application-specific bottlenecks can be resolved by reconfiguring the interconnection network according to the current application demands. The benefits of the architectural solutions are confirmed by simulations that clearly show that the architectures can achieve high performance for both symmetric application characteristics and for several classes of asymmetric application characteristics. The final architectural solution is characterized by electronic packet-switches interconnected through an optical backplane, which is reconfigurable. Moreover, the thesis presents how several signal processing applications can be mapped to run concurrently in a time-shared scheme on a single reconfigurable multi-processor system that has high flexibility to adapt for the application currently at hand. The interconnection network is then adapted (reconfigured) according to the demands of the currently executed application in each time instance. The analysis shows that it is feasible to build such a system with today’s components.
|
|
| 3. |
- Agelis, Sacki, et al.
(author)
-
Reconfigurable optical interconnection system supporting concurrent application-specific parallel computing
- 2005
-
In: 17th Symposium on Computer Architecture and High Performance Computing. - Washington, DC, USA : IEEE Computer Society. - 076952446X ; , s. 44-51
-
Conference paper (peer-reviewed)abstract
- Application specific architectures are highly desirable in embedded parallel computing systems at the same time as designers strive for using one embedded parallel computing platform for several applications. If this can be achieved, the cost can be decreased in comparison to using several different embedded parallel computing systems. This paper presents a novel approach of running several high-performance applications concurrently on one single parallel computing system. By using a reconfigurable backplane interconnection system, the applications can be run efficiently with high network flexibility since the interconnect network can be adapted to fit the application that is being processed for the moment. More precisely, this paper investigates how the space time adaptive processing (STAP) radar algorithm and the stripmap synthetic aperture radar (SAR) algorithm can be mapped on a multi-cluster processing system with a reconfigurable optical interconnection system realized by a micro-optical-electrical mechanical system (MOEMS) crossbars. The paper describes the reconfigurable platform, the two algorithms and how they individually can be mapped on the targeted multiprocessor system. It is also described how these two applications can be mapped simultaneously on the optical reconfigurable platform. Implications and requirements on communication bandwidth and processor performance in different critical points of the two applications are presented. The results of the analysis show that an implementation is feasible with today's MOEMS technology, and that the two applications can be successfully run in a time-sharing scheme, both at the processing side and at the access for interconnection bandwidth.
|
|
| 4. |
- Ahlborg, Tone, 1950, et al.
(author)
-
Assessing the quality of the dyadic relationship in first-time parents: development of a new instrument.
- 2005
-
In: Journal of family nursing. - Thousand Oaks, Calif. : SAGE Publications. - 1074-8407 .- 1552-549X. ; 11:1, s. 19-37
-
Journal article (peer-reviewed)abstract
- The purpose of this research was to psychometrically evaluate the Dyadic Adjustment Scale (DAS), modified for use with new, first-time parents by extending the items of communication, sensuality, and sexuality. A total of 820 Swedish respondents, 6 months after the birth of their first child, participated in the study. Psychometric evaluation was conducted with factor analysis. The obtained factor structure was tested with multitrait analysis program. Thirty-three items were found to fit into a five-factor solution, explaining 50% of the total variance. Descriptive data revealed that most new parents were satisfied with their intimate relationship in general, but dissatisfied with their sexual lives. The modified DAS, now called the Quality of Dyadic Relationship Instrument includes 33 items and seems to be a useful, updated measurement for assessing quality of the intimate relationship in new first-time parents.
|
|
| 5. |
|
|
| 6. |
- Alonso-Fernandez, Fernando, 1978-, et al.
(author)
-
A Review Of Schemes For Fingerprint Image Quality Computation
- 2005
-
In: COST Action 275. - Luxembourg : EU Publications Office (OPOCE). - 9789289800198 ; , s. 3-6
-
Conference paper (peer-reviewed)abstract
- Fingerprint image quality affects heavily the performance of fingerprint recognition systems. This paper reviews existing approaches for fingerprint image quality computation. We also implement, test and compare a selection of them using the MCYT database including 9000 fingerprint images. Experimental results show that most of the algorithms behave similarly.
|
|
| 7. |
- Alonso-Fernandez, Fernando, et al.
(author)
-
An enhanced Gabor filter-based segmentation algorithm for fingerprint recognition systems
- 2005
-
Conference paper (peer-reviewed)abstract
- An imponant step in fingerprint recognition is the segmentation of the region of interest. In this paper, we present an enhanced approach for fingerprint segmentation based on the response of eight oriented Gabor filters. The performance of the algorithm has been evaluated in terms of decision error trade-off curves of an overall verification system. Experimental results demonstrate the robustness of the proposed method.
|
|
| 8. |
- Alonso-Fernandez, Fernando, et al.
(author)
-
On-line signature verification using Tablet PC
- 2005
-
In: Proceedings of the 4th International Symposium on Image and Signal Processing and Analysis. - Zagreb : University of Zagreb. - 9789531840897 - 953184089X ; , s. 245-250
-
Conference paper (peer-reviewed)abstract
- On-line signature verification for Tablet PC devices is studied. The on-line signature verification algorithm presented by the authors at the First International Signature Verification Competition (SVC 2004) is adapted to work in Tablet PC environments. An example prototype of securing access and securing document application using this Tablet PC system is also reported. Two different commercial Tablet PCs are evaluated, including information of interest for signature verification systems such as sampling and pressure statistics. Authentication performance experiments are reported considering both random and skilled forgeries by using a new database with over 3000 signatures.
|
|
| 9. |
- Alonso-Fernandez, Fernando, et al.
(author)
-
Sensor interoperability and fusion in signature verification : a case study using Tablet PC
- 2005
-
In: Advances in biometric person authentification. - New York : Springer-Verlag New York. - 9783540294313 ; , s. 180-187
-
Conference paper (peer-reviewed)abstract
- Several works related to information fusion for signature verification have been presented. However, few works have focused on sensor fusion and sensor interoperability. In this paper, these two topics are evaluated for signature verification using two different commercial Tablet PCs. An enrolment strategy using signatures from the two Tablet PCs is also proposed. Authentication performance experiments are reported by using a database with over 3000 signatures. © Springer-Verlag Berlin Heidelberg 2005.
|
|
| 10. |
- Amirahmadi, S. F., et al.
(author)
-
Arthritogenic anti-type II collagen antibodies are pathogenic for cartilage-derived chondrocytes independent of inflammatory cells
- 2005
-
In: Arthritis and Rheumatism. - : Wiley. - 0004-3591 .- 1529-0131. ; 52:6, s. 1897-1906
-
Journal article (peer-reviewed)abstract
- OBJECTIVE: Some monoclonal antibodies (mAb) to type II collagen (CII) are arthritogenic upon passive transfer to mice. We undertook this study to investigate whether such mAb are pathogenic in the absence of mediators of inflammation. METHODS: The arthritogenic mAb CIIC1 and M2139, and the nonarthritogenic mAb CIIF4, each reactive with a distinct and well-defined conformational epitope on CII, were compared with control mAb GAD6. Bovine chondrocytes were cultured with one of the mAb, and on days 3, 6, and 9, antibody binding by chondrocytes and newly synthesized extracellular matrix (ECM) was examined by immunofluorescence, morphologic effects were studied by electron microscopy, and synthesis of matrix components was determined by metabolic labeling with (3)H-proline for collagen and (35)S-sulfate for proteoglycans. RESULTS: All 3 mAb to CII bound to the matrix. CIIC1 and M2139 adversely affected the cultures, whereas CIIF4 did not. CIIC1 caused disorganization of CII fibrils in the ECM without affecting chondrocyte morphology, and increased matrix synthesis. M2139 caused thickening and aggregation of CII fibrils in the ECM and abnormal chondrocyte morphology but matrix synthesis was unaffected. CONCLUSION: The unique arthritogenic capacity of particular anti-CII mAb upon passive transfer could be explained by their adverse, albeit differing, effects in primary cultures of chondrocytes. Such effects occur independent of inflammation mediators and are related to the epitope specificity of the mAb. Interference with the structural integrity of CII could precede, and even initiate, the inflammatory expression of disease.
|
|
