| 1. |
|
|
| 2. |
- Lundgren, Rebecka, et al.
(författare)
-
Circular Economy in the Nordic Real Estate and Construction Industry: A Policy Review
- 2023
-
Ingår i: SDGs in Construction Economics and Organization : Nordic Conference on Construction Economics and Organization CREON 2022 - Nordic Conference on Construction Economics and Organization CREON 2022. - 2198-7254 .- 2198-7246. - 9783031254970 - 9783031254987
-
Konferensbidrag (refereegranskat)abstract
- Circular economy (CE) has gained attention in the real estate and construction policy, practice, and research in the past few years. This study explores how two neighboring Nordic countries and EU member states, Sweden and Finland, are transitioning toward circularity in the real estate and construction industry context. The aim is reached through a review of CE policies on the national and industrial level, as well as a practice review on the city level. Common features for both countries include the promotion of circular business models, with digitalization seen as an enabler for circular economy. This indicates that the policies from both countries have moved beyond the so-called long loops and recycling focus. Still, much more focus should be placed on the short loops, such as sharing and access-based models, which are more efficient in reaching sustainable consumption targets.
|
|
| 3. |
- Lundgren, Sofia, et al.
(författare)
-
Clinical outcome and factors determining new bone formation in lateral sinus membrane elevation with simultaneous implant placement without grafting material : a cross‐sectional, 3‐17 year follow‐up study
- 2019
-
Ingår i: Clinical Implant Dentistry and Related Research. - Hoboken : John Wiley & Sons. - 1523-0899 .- 1708-8208. ; 21:5, s. 827-834
-
Tidskriftsartikel (refereegranskat)abstract
- Background: Lateral sinus membrane elevation with simultaneous implant placement without grafting material (graft‐less LSFE) is a widely investigated method for bone augmentation of the maxillary sinus floor. Long‐term follow‐up studies are rare.Purpose: This study aimed to investigate the long‐term effects of implants placed with graft‐less LSFE.Materials and methods: The study group was comprised of 111 patients previously treated with graft‐less LSFE. The first follow‐up visit, which occurred after a mean of 5 years after surgery, included a clinical examination, cone beam computerized tomography, and panorama or intraoral radiography. The second follow‐up included panorama or intraoral radiography, and it was conducted after a mean of 8 years.Results: Overall, 218 implants were placed in 127 sinuses. Nine of the 218 implants failed resulting in an overall implant survival of 95.9%. The average bone gain at the follow‐up was 4.0 ±2.0 mm.Conclusion: The implant‐supported rehabilitation achieved using graft‐less LSFE was stable over time, and there was no or little impact on sinus health. Furthermore, it was concluded that the new bone formation and the amount of bone gain is proportional to the length of the implant protruding into the sinus cavity.
|
|
| 4. |
- Lundgren, Tord, et al.
(författare)
-
Periodontal treatment of patients with Papillon-Lefèvre syndrome : a 3-year follow-up
- 2004
-
Ingår i: Journal of Clinical Periodontology. - 0303-6979 .- 1600-051X. ; 31:11, s. 933-938
-
Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND/AIM: Conventional mechanical periodontal treatment of Papillon-Lefevre syndrome (PLS) has often been reported to fail. This study describes the outcome of a non-surgical periodontal therapy including antimicrobial treatment of nine patients diagnosed with PLS. The patients originate from a total of 15 children and adolescents with PLS for which clinical characteristics are presented.METHODS: Clinical examination including conventional periodontal measurements. Initial treatment including oral hygiene instruction, scaling and root planing and systemic amoxicillin-metronidazole therapy for 6 weeks. After that the patients were enrolled in a 3-month recall maintenance program. In addition to this mechanical supportive maintenance treatment, tetracycline was prescribed and used continuously for 1.5 years.RESULTS/CONCLUSION: On five patients who were showing acceptable standard of oral hygiene and also compliance with the antibiotic medication, development of periodontitis on erupting teeth was prevented and disease activity on the previously periodontally involved teeth controlled during a 3-year period. Poor results of treatment were observed for three patients, all siblings. These patients failed to comply with the medication and also failed to improve their oral hygiene.
|
|
| 5. |
- Alavian Ghavanini, Farzan, 1978, et al.
(författare)
-
CMOS considerations in nanoelectromechanical carbon nanotube-based switches
- 2008
-
Ingår i: Nanotechnology. - 1361-6528 .- 0957-4484.
-
Tidskriftsartikel (refereegranskat)abstract
- In this paper, we focus on critical issues directly related to the viability of carbon nanotube-based nanoelectromechanical switches, to perform their intended functionality as logic and memory elements, through assessment of typical performance parameters with reference to complementary metal-oxide-semiconductor devices. A detailed analysis of performance metrics regarding threshold voltage control, static and dynamic power dissipation, speed, and integration density is presented. Apart from packaging and reliability issues, these switches seem to be competitive in low power, particularly low-standby power, logic and memory applications.
|
|
| 6. |
- Alavian Ghavanini, Farzan, 1978, et al.
(författare)
-
Vertically aligned carbon based varactors
- 2011
-
Ingår i: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 110:2
-
Tidskriftsartikel (refereegranskat)abstract
- This paper gives an assessment of vertically aligned carbon based varactors and validates their potential for future applications. The varactors discussed here are nanoelectromechanical devices which are based on either vertically aligned carbon nanofibers or vertically aligned carbon nanotube arrays. A generic analytical model for parallel plate nanoelectromechanical varactors based on previous works is developed and is used to formulate a universal expression for their voltage-capacitance relation. Specific expressions for the nanofiber based and the nanotube based varactors are then derived separately from the generic model. This paper also provides a detailed review on the fabrication of carbon based varactors and pays special attention to the challenges in realizing such devices. Finally, the performance of the carbon based varactor is assessed in accordance with four criteria: the static capacitance, the tuning ratio, the quality factor, and the operating voltage. Although the reported performance is still far inferior to other varactor technologies, our prognosis which stems from the analytical model shows a promise of a high quality factor as well as a potential for high power handling for carbon based varactors.
|
|
| 7. |
|
|
| 8. |
- Andersson, Anders, et al.
(författare)
-
Global analysis of mRNA stability in the archaeon Sulfolobus
- 2006
-
Ingår i: Genome Biology. - : Springer Science and Business Media LLC. - 1465-6906 .- 1474-760X. ; 7:10, s. R99-
-
Tidskriftsartikel (refereegranskat)abstract
- Background: Transcript half-lives differ between organisms, and between groups of genes within the same organism. The mechanisms underlying these differences are not clear, nor are the biochemical properties that determine the stability of a transcript. To address these issues, genome-wide mRNA decay studies have been conducted in eukaryotes and bacteria. In contrast, relatively little is known about RNA stability in the third domain of life, Archaea. Here, we present a microarray-based analysis of mRNA half-lives in the hyperthermophilic crenarchaea Sulfolobus solfataricus and Sulfolobus acidocaldarius, constituting the first genome-wide study of RNA decay in archaea. Results: The two transcriptomes displayed similar half-life distributions, with medians of about five minutes. Growth-related genes, such as those involved in transcription, translation and energy production, were over-represented among unstable transcripts, whereas uncharacterized genes were over-represented among the most stable. Half-life was negatively correlated with transcript abundance and, unlike the situation in other organisms, also negatively correlated with transcript length. Conclusion: The mRNA half-life distribution of Sulfolobus species is similar to those of much faster growing bacteria, contrasting with the earlier observation that median mRNA half-life is proportional to the minimal length of the cell cycle. Instead, short half-lives may be a general feature of prokaryotic transcriptomes, possibly related to the absence of a nucleus and/or more limited post-transcriptional regulatory mechanisms. The pattern of growth-related transcripts being among the least stable in Sulfolobus may also indicate that the short half-lives reflect a necessity to rapidly reprogram gene expression upon sudden changes in environmental conditions.
|
|
| 9. |
- Andersson, Anders, et al.
(författare)
-
Replication-biased genome organisation in the crenarchaeon Sulfolobus
- 2010
-
Ingår i: BMC Genomics. - : Springer Science and Business Media LLC. - 1471-2164. ; 11, s. 454-
-
Tidskriftsartikel (refereegranskat)abstract
- Background: Species of the crenarchaeon Sulfolobus harbour three replication origins in their single circular chromosome that are synchronously initiated during replication. Results: We demonstrate that global gene expression in two Sulfolobus species is highly biased, such that early replicating genome regions are more highly expressed at all three origins. The bias by far exceeds what would be anticipated by gene dosage effects alone. In addition, early replicating regions are denser in archaeal core genes (enriched in essential functions), display lower intergenic distances, and are devoid of mobile genetic elements. Conclusion: The strong replication-biased structuring of the Sulfolobus chromosome implies that the multiple replication origins serve purposes other than simply shortening the time required for replication. The higher-level chromosomal organisation could be of importance for minimizing the impact of DNA damage, and may also be linked to transcriptional regulation.
|
|
| 10. |
|
|
