| 1. |
- Ahlsson, Anders, et al.
(författare)
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Atrial function after epicardial microwave ablation in patients with atrial fibrillation
- 2008
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Ingår i: Scandinavian Cardiovascular Journal. - : Taylor & Francis. - 1401-7431 .- 1651-2006. ; 42:3, s. 192-201
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: To study epicardial microwave ablation of concomitant atrial fibrillation and its effects on heart rhythm and atrial function during follow-up. DESIGN: The study included 20 open-heart surgery patients with concomitant atrial fibrillation. Transthoracic echocardiography with flow and tissue Doppler recordings was performed preoperatively and at 6 months postoperatively. Blood samples were obtained preoperatively and postoperatively for analysis of atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP), and amino terminal precursor of brain natriuretic peptide (NT-proBNP). RESULTS: Fourteen of 19 patients (74%) were in sinus rhythm with no antiarrhythmic drugs at 12 months. All patients in sinus rhythm had preserved left and right atrial-filling waves through atrioventricular valves during atrial contraction. Tissue velocity echocardiography on patients in sinus rhythm showed preserved atrial wall velocities, atrial strain, and atrial strain rate. Levels of natriuretic peptides tended to decrease in patients with stable sinus rhythm at one year compared to patients in atrial fibrillation. CONCLUSIONS: Epicardial microwave ablation results in sinus rhythm in a majority of patients and seems to preserve atrial mechanical function
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| 3. |
- El-Sayed, Najib M., et al.
(författare)
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The genome sequence of Trypanosoma cruzi, etiologic agent of Chagas disease.
- 2005
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Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 1095-9203 .- 0036-8075. ; 309:5733, s. 409-15
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Tidskriftsartikel (refereegranskat)abstract
- Whole-genome sequencing of the protozoan pathogen Trypanosoma cruzi revealed that the diploid genome contains a predicted 22,570 proteins encoded by genes, of which 12,570 represent allelic pairs. Over 50% of the genome consists of repeated sequences, such as retrotransposons and genes for large families of surface molecules, which include trans-sialidases, mucins, gp63s, and a large novel family (>1300 copies) of mucin-associated surface protein (MASP) genes. Analyses of the T. cruzi, T. brucei, and Leishmania major (Tritryp) genomes imply differences from other eukaryotes in DNA repair and initiation of replication and reflect their unusual mitochondrial DNA. Although the Tritryp lack several classes of signaling molecules, their kinomes contain a large and diverse set of protein kinases and phosphatases; their size and diversity imply previously unknown interactions and regulatory processes, which may be targets for intervention.
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| 4. |
- Clapham, Eric, et al.
(författare)
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Revisiting the Past and Settling the Score:Index Revision for House Price Derivatives
- 2006
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Ingår i: Real Estate Economics. - : Wiley. - 1080-8620 .- 1540-6229. ; 34:2, s. 275-302
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Tidskriftsartikel (refereegranskat)abstract
- This paper examines index revision in measuring the prices for owner-occupied housing. We consider the context of equity insurance and the settlement of futures contracts. In addition to other desirable characteristics for aggregate price indexes, their usefulness in these contexts requires stability as they are revised. Methods that are subject to substantial or complex revision raise questions about the viability of derivatives markets. Of course, all indexes are subject to revision as the result of new information. Nevertheless, we find that the most-widely used house price indexes are not equally exposed to volatility in revision. Hedonic indexes appear to be substantially more stable than repeat-sales indexes and are less prone to substantial revision in the light of new information. Moreover, we find that the repeat-sales indexes are subject to systematic downward revision. We analyze alternative settlement procedures and contracts to mitigate the impact of revision associated with repeat sale indexes.
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| 5. |
- Englund, Göran, et al.
(författare)
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Scale dependence of immigration rates : models, metrics and data.
- 2007
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Ingår i: J Anim Ecol. - : Wiley. - 0021-8790 .- 1365-2656. ; 76:1, s. 30-5
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Tidskriftsartikel (refereegranskat)abstract
- 1. We examine the relationship between immigration rate and patch area for different types of movement behaviours and detection modes. Theoretical models suggest that the scale dependence of the immigration rate per unit area (I/A) can be described by a power model I/A = i*Areaζ, where ζ describes the strength of the scale dependence.2. Three types of scaling were identified. Area scaling (ζ=0) is expected for passively dispersed organisms that have the same probability of landing anywhere in the patch. Perimeter scaling (−0·30>ζ>−0·45) is expected when patches are detected from a very short distance and immigrants arrive over the patch boundary, whereas diameter scaling (ζ=−0·5) is expected if patches are detected from a long distance or if search is approximately linear.3. A meta-analysis of published empirical studies of the scale dependence of immigration rates in terrestrial insects suggests that butterflies show diameter scaling, aphids show area scaling, and the scaling of beetle immigration is highly variable. We conclude that the scaling of immigration rates in many cases can be predicted from search behaviour and the mode of patch detection.
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| 6. |
- Englund, Göran, et al.
(författare)
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Top-down and bottom-up effects on the spatiotemporal dynamics of cereal aphids: Testing scaling theory for local density
- 2007
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Ingår i: Journal of Animal Ecology. - : Wiley. - 0021-8790 .- 1365-2656. ; 76:1, s. 30-35
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Tidskriftsartikel (refereegranskat)abstract
- 1.We examine the relationship between immigration rate and patch area for different types of movement behaviours and detection modes. Theoretical models suggest that the scale dependence of the immigration rate per unit area (I/A) can be described by a power model I/A = i*Areaζ, where ζ describes the strength of the scale dependence. 2.Three types of scaling were identified. Area scaling (ζ = 0) is expected for passively dispersed organisms that have the same probability of landing anywhere in the patch. Perimeter scaling (−0·30 > ζ > −0·45) is expected when patches are detected from a very short distance and immigrants arrive over the patch boundary, whereas diameter scaling (ζ = −0·5) is expected if patches are detected from a long distance or if search is approximately linear. 3.A meta-analysis of published empirical studies of the scale dependence of immigration rates in terrestrial insects suggests that butterflies show diameter scaling, aphids show area scaling, and the scaling of beetle immigration is highly variable. We conclude that the scaling of immigration rates in many cases can be predicted from search behaviour and the mode of patch detection.
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| 8. |
- Englund, Peter, et al.
(författare)
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Adjustment in property space markets : Taking long-term leases and transaction costs seriously
- 2008
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Ingår i: Real estate economics (Print). - : Wiley. - 1080-8620 .- 1540-6229. ; 36:1, s. 81-109
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Tidskriftsartikel (refereegranskat)abstract
- Markets for property space adjust only gradually because tenants and landlords are constrained by long-term leases and transaction and information costs. Not only do rents adjust slowly, but space occupancy, which depends on historical rents, often differs from demand at current rent. This creates "hidden vacancies," vacancies that will develop in the future if market rent and the space demand driver are unchanged. That is, if current rent is greater/lesser than average rent, then hidden vacancies are positive/negative. Moreover, because of hidden vacancies, open vacancies and rent are not mirror images of each other. Thus it is necessary to estimate both rental and vacancy rate adjustment processes. We do this using annual data for Stockholm offices during the 1977-2002 period and simulate the response of rent and vacancies (open and hidden) to an employment shock.
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